JP3591783B2

JP3591783B2 - Drive control device for CNC jig grinding machine

Info

Publication number: JP3591783B2
Application number: JP10416793A
Authority: JP
Inventors: 二千男宮澤
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-30
Filing date: 1993-04-30
Publication date: 2004-11-24
Anticipated expiration: 2019-11-24
Also published as: JPH06312356A

Description

【０００１】
【産業上の利用分野】
本発明は、左右・前後に移動する作業テーブル上に載置セットされたコーナーが円弧状で平面多角形形状の被研削物の加工輪郭面に、前記テーブルの移動と，スピンドルの上下移動とによる研削砥石の上下移動と、そして、該スピンドル軸で砥石軸を偏向させると共に、切込み量を設定するスライド部材を備えた自動切込み装置による移動によって、該スライド部材を介して支持させた高周波モーターによる独自に駆動回転する研削砥石を沿わせながら、上下に連なるテーパー部と垂直部とを連続加工するＣＮＣ治具研削盤に関し、特に上下に連なるテーパー部と垂直部とを連続加工するその加工動作の制御に係るＣＮＣ治具研削盤の駆動制御装置に関する。
【０００２】
【従来の技術及びその問題点】
従来、この種のＣＮＣ治具研削盤は、作業テーブル上に載置セットされた被研削物の加工輪郭面に、テーパー部と垂直部とを上下に連ねて研削加工する場合、研削砥石を上下に往復移動させるスピンドルの上下振動がされても、このスピンドルの上下移動を制御し、位置決めできるものがなかった。
従って、従来の研削盤においては、まず初めに研削砥石を取り付けたスピンドルの角度を垂直な姿勢から加工するテーパー部のテーパー角度に合わせ、ＮＣ装置からのＮＣ指令による作業テーブルの左右・前後方向の移動と、スピンドルの上下振動で研削砥石を前記加工面に沿わせながら加工し、テーパー部の加工が終了した後に、スピンドルを垂直な元の姿勢に戻してテーパー部に連なる垂直部を加工していた。
【０００３】
然るに、従来の研削盤は、被研削物を載置する作業テーブルを左右・前後方向即ちＸ軸方向とＹ軸方向に移動させるその駆動はＮＣ指令によるＮＣ自動運転が可能なものの、砥石を支持するスピンドルを上下方向即ちＺ軸方向へ往復移動させるその駆動はシリンダー等による機械的往復動を行なっているために、Ｚ軸方向の位置決め制御が出来ず、テーパー部のみ、或いは垂直部のみの単独加工であれば可能であるが、両者を連続加工することができなかった。
即ち、従来の研削盤はテーブルを移動させるＸ軸とＹ軸の駆動部のみを自動運転を可能とする二次元制御であるために、被研削物の加工面におけるテーパ-部と垂直部とを連続加工することはできいものであった。
【０００４】
また、従来の研削盤では、平面多角形形状を呈する被研削物の加工輪郭面にその各辺直線部とコーナーとを加工するためにはスピンドルの角度を変える段取りを行なわなければならない。
即ち、各辺直線部を加工するための段取りと、該直線部の加工が終了した後にコーナー及びその隣接する垂直部を加工する段取りとを行なわなければならないために、作業能率が極めて悪く、しかも２工程に分けてテーパー部と垂直部の加工を行なわなければならないことから、加工時間が一層長くなってしまうと言う問題がある。
【０００５】
【発明が解決しようとする課題】
本発明はこの様な従来事情に鑑みてなされたもので、平面多角形形状を呈する被研削物の加工輪郭面が上下に連なるテーパー部と垂直部とであって、このテーパ - 部と垂直部とを連続加工を可能ならしめ、且つ、各辺直線部とコーナーとを連続の移動可能ならせしめて、その加工時間の短縮と無人運転を可能にしたＣＮＣ治具研削盤の駆動制御装置を提供することを目的とする。
【０００６】
【課題を達成するための手段】
上記目的を達成するために本発明が講じる技術的手段は、請求項１では、左右・前後に移動（Ｘ軸，Ｙ軸移動）する作業テーブル上に載置セットされた平面多角形形状を呈し、コーナーが円弧状である被研削物の加工輪郭面に、前記作業テーブルの移動と、スピンドルの上下の移動による研削砥石の上下移動（Ｚ軸移動）と、そして、該スピンドルの下端にスピンドル軸（Ｃ軸）で砥石軸を偏向させると共に、切込み量を設定するスライド部材を備えた自動切込み装置の移動（Ｕ軸移動）とによって、スライド部材を介して支持された高周波モーターにより独自に駆動回転する研削砥石を沿わせながら、上下に連なるテーパー部と垂直部とを同時に連続加工するＣＮＣ治具研削盤であって、
被研削物の加工輪郭面の各辺直線部の長さと各コーナーＲの円弧長さを設計値寸法より算出する算出手段Ａ、この算出手段Ａにより算出された被研削物の前記各辺直線部の長さと、各コーナーＲの円弧長さに基づき、該直線部とコーナーＲの加工分割回数である割出し数を算出する算出手段Ｂ、割出された各部分の直線部及びコーナーＲのテーパー部の加工距離と、このテーパー部に連なる垂直部の加工距離とを設計値寸法より算出する算出手段Ｃ、直線部及びコーナーＲのテーパー部の垂直部に対するテーパー角度に基づき、前記スピンドルと作業テーブルとの同期した移動距離を算出する算出手段Ｄ、この算出手段Ｄにより算出された移動距離に基づき、位置決めできる前記スピンドルと作業テーブルとを同期移動させ、このスピンドルの移動量が前記算出手段Ｃにより算出されたテーパー部の加工距離に到達した時点でスピンドルのみが単独で移動して垂直部を加工するように制御する制御手段Ａ、この制御手段Ａに基づいて、スピンドル及び作業テーブルを同期した移動位置決めする駆動機構Ａ、前記算出手段Ｂにより算出された各辺直線部及びコーナーＲの加工分割回数である割出し数に基づく前記駆動機構Ａによる作業テーブルの移動に追動させながらその移動に伴い変わる研削砥石の当り面を常に各辺直線部及びコーナーＲの加工輪郭面に対し法線方向に向けるようにスピンドル軸で砥石軸を偏向方向へ偏向させ、このスピンドル軸による偏向を駆動機構Ａによる作業テーブルの移動に同期させる制御手段Ｂ、この制御手段Ｂに基づいて、研削砥石の当り面を常に被研削物の加工輪郭面に対して法線方向に向けるようにスピンドル軸で砥石軸を偏向させ、研削する駆動機構Ｂを備えたことを特徴とする。
【０００７】
また、請求項２では、左右・前後に移動（Ｘ軸，Ｙ軸移動）する作業テーブル上に載置セットされた平面矩形形状を呈し、コーナーが角状である被研削物の加工輪郭面に、前記作業テーブルの移動と、スピンドルの上下の移動による研削砥石の上下移動（Ｚ軸移動）と、そして、該スピンドルの下端にスピンドル軸（Ｃ軸）で砥石軸を偏向させると共に、切込み量を設定するスライド部材を備えた自動切込み装置の移動（Ｕ軸移動）とによって、スライド部材を介して支持された高周波モーターにより独自に駆動回転する研削砥石を沿わせながら、上下に連なるテーパー部と垂直部とを同時に連続加工するＣＮＣ治具研削盤であって、
被研削物の加工輪郭面の各辺直線部の長さを設計値寸法より算出する算出手段Ａ、この算出手段Ａにより算出された被研削物の前記各辺直線部の長さに基づき、加工分割回数である割出し数を算出する算出手段Ｂ、割出された各部分のテーパー部の加工距離と、このテーパー部に連なる垂直部の加工距離とを設計値寸法より算出する算出手段Ｃ、テーパー部の垂直部に対するテーパー角度に基づき、前記スピンドルと作業テーブルとの同期した移動距離を算出する算出手段Ｄ、この算出手段Ｄにより算出された移動距離に基づき、位置決めできる前記スピンドルと作業テーブルとを同期移動させ、このスピンドルの移動量が前記算出手段Ｃにより算出されたテーパー部の加工距離に到達した時点でスピンドルのみが単独で移動して垂直部を加工するように制御する制御手段Ａ、この制御手段Ａに基づいて、スピンドル及び作業テーブルを同期した移動位置決めする駆動機構Ａ、前記算出手段Ｂにより算出された各辺直線部の加工分割回数である割出し数に基づく前記駆動機構Ａによる作業テーブルの移動に追動させ、研削砥石の当り面を常に各辺直線部の加工輪郭面に対し法線方向に向けるようにスピンドル軸で砥石軸を偏向させ、このスピンドル軸による偏向を駆動機構Ａによる作業テーブルの移動に同期させる制御手段Ｂ、この制御手段Ｂに基づいて、研削砥石の当り面を常に被研削物の加工輪郭面に対して法線方向に向ける偏向をスピンドル軸による砥石軸の偏向で行い、研削する駆動機構Ｂを備えたことを特徴とする。
【０００８】
更に、請求項３では、左右・前後に移動（Ｘ軸，Ｙ軸移動）する作業テーブル上に載置セットされた平面リングを呈する被研削物の加工輪郭面に、前記作業テーブルの移動と、スピンドルの上下の移動による研削砥石の上下移動（Ｚ軸移動）と、そして、該スピンドルの下端にスピンドル軸（Ｃ軸）で砥石軸を偏向させると共に、切込み量を設定するスライド部材を備えた自動切込み装置の移動（Ｕ軸移動）とによって、スライド部材を介して支持された高周波モーターにより独自に駆動回転する研削砥石を沿わせながら、上下に連なるテーパー部と垂直部とを同時に連続加工するＣＮＣ治具研削盤であって、
被研削物の加工輪郭面の各辺直線部のリング円周長さを設計値寸法より算出する算出手段Ａ、この算出手段Ａにより算出された被研削物の前記リング円周長さに基づき、加工分割回数である割出し数を算出する算出手段Ｂ、割出された各部分のテーパー部の加工距離と、このテーパー部に連なる垂直部の加工距離とを設計値寸法より算出する算出手段Ｃ、テーパー部の垂直部に対するテーパー角度に基づき、前記スピンドルと作業テーブルとの同期した移動距離を算出する算出手段Ｄ、この算出手段Ｄにより算出された移動距離に基づき、位置決めできる前記スピンドルと作業テーブルとを同期移動させ、このスピンドルの移動量が前記算出手段Ｃにより算出されたテーパー部の加工距離に到達した時点でスピンドルのみが単独で移動して垂直部を加工するように制御する制御手段Ａ、この制御手段Ａに基づいて、スピンドル及び作業テーブルを同期した移動位置決めする駆動機構Ａ、前記算出手段Ｂにより算出されたリング円周長さの加工分割回数である割出し数に基づく前記駆動機構Ａによる作業テーブルの移動に追動させながらその移動に伴い変わる研削砥石の当り面を常にリング円周の加工輪郭面に対し法線方向に向けるようにスピンドル軸で砥石軸を偏向方向へ偏向させ、このスピンドル軸による偏向を駆動機構Ａによる作業テーブルの移動に同期させる制御手段Ｂ、この制御手段Ｂに基づいて、研削砥石の当り面を常に前記リング円周の加工輪郭面に対して法線方向に向けるようにスピンドル軸で砥石軸を偏向させ、研削する駆動機構Ｂを備えたことを特徴とする。
【０００９】
【作用】
而して、上記した請求項１に記載の技術的手段によれば、被研削物を載置セットする作業テーブルの左右・前後の移動（Ｘ軸，Ｙ軸移動）と、研削砥石を独自駆動回転可能に高周波モーターを介して自動切込み装置におけるスライド部材を支持させるスピンドルの上下移動（Ｚ軸移動）は、算出手段Ａ〜Ｄにより算出されて設定される加工条件（内容を含む）に基づく制御手段Ａによる駆動機構Ａの駆動制御によって実行され、且つ駆動機構Ａにより研削砥石の当り面を常に加工輪郭面に対し法線方向に向けるスピンドル軸（Ｃ軸）に対する砥石軸の偏向を、スライド部材で行い前記駆動機構Ａによるテーブルの移動（Ｘ軸，Ｙ軸移動）に同期させる制御手段Ｂによって実行されて、コーナーが円弧状で平面多角形形状を呈する被研削物のコーナーＲと各辺直線部の加工輪郭面に上下に連なるテーパー部と垂直部との連続加工が駆動機構Ｂで行なわれる。
【００１０】
また、請求項２に記載の技術的手段によれば、被研削物を載置セットする作業テーブルの左右・前後の移動（Ｘ軸，Ｙ軸移動）と研削砥石を独自駆動回転可能に高周波モーターを介してスライド部材に支持するスピンドルの上下移動（Ｚ軸移動）は、算出手段Ａ〜Ｄにより算出されて設定される加工条件（内容を含む）に基づく制御手段Ａによる駆動機構Ａの駆動と制御手段Ｂによる駆動機構Ｂの駆動により研削砥石の当り面を、常に平面多角形形状の加工輪郭面に対し法線方向に向けるスピンドル軸（Ｃ軸）に対する砥石軸の偏向によって実行されて、被研削物の加工輪郭面に上下に連なるテーパー部と垂直部との連続加工が行なわれる。
【００１１】
更に、請求項３に記載の技術的手段によれば、被研削物を載置セットする作業テーブルの左右・前後の移動（Ｘ軸，Ｙ軸移動）と研削砥石を独自駆動回転可能に高周波モーターを介してスライド部材に支持するスピンドルの上下移動（Ｚ軸移動）は、算出手段Ａ〜Ｄにより算出されて設定される加工条件（内容を含む）に基づく制御手段Ａによる駆動機構Ａの駆動と、制御手段Ｂによる駆動機構Ｂの駆動により研削砥石の当り面を、常にリング状の加工輪郭面に対し法線方線方向に向けるスピンドル軸（Ｃ軸）に対する砥石軸の偏向によって実行されて、リング状被研削物の加工輪郭面に上下に連なるテーパー部と垂直部との連続加工が行なわれる。
【００１２】
【実施例】
本発明の実施例を図面に基づいて以下説明すれば、図１、図２はＣＮＣ治具研削盤の外観（全体）を示した側面図及び正面図である。
作業テーブル１は、架台上に左右・前後方向即ちＸ軸方向とＹ軸方向に移動自在に配設され、後述する駆動機構Ａ10のＸ軸サーボモーターX-1 により左右方向に移動、そしてＹ軸サーボモーターY-1 により前後方向に移動せしめて、その作業テー部１の上面にセットされた平面多角形形状を呈する被研削物４を左右・前後方向に移送するようになっている。
スピンドル２は、作業テーブル１の上方位置に装着した昇降枠機構に固着支持させて上下方向、即ちＺ軸方向に移動自在に配設され、そのスピンドル２下端にスピンドル軸（Ｃ軸）で砥石軸を偏向させると共に、切込み量を設定するスライド部材 14 が備えられた自動切込み装置12を介して下端に支持する高周波モーター13により独自に駆動回転し被研削物４の加工輪郭面５を研削加工する研削砥石３が、該加工輪郭面５に沿わせて上下往復移動させるようになっている。尚、研削砥石３の下端円周縁は、円弧状に面取り加工されている。
【００１３】
図３は、本発明駆動制御装置の実施の一例を示す機能ブロック図である。
図において、６は被研削物４の加工輪郭面５の各辺直線部の長さと各コーナーＲの円周長さを設計値寸法より算出する算出手段Ａ、７は算出手段Ａ６により算出された被研削物４の前記各辺直線部と、各コーナーＲの円弧長さに基づき、加工輪郭面５の加工分割回数である割出し数を算出する算出手段Ｂ、８は割出された各部分の直線部及びコーナーＲの加工輪郭面５のテーパー部5aの加工距離Ｌ１（図８（ロ）、図 12 （ロ）、図 13 （ロ）参照）と、このテーパー部5aに連なる垂直部5bの加工距離Ｌ２（図８（ロ）、図 12 （ロ）、図 13 （ロ）参照）とを設計値寸法より算出する算出手段Ｃ、９はテーパー部5aのテーパー角度θに基づき前記スピンドル２と作業テーブル１との同期させた移動距離を算出する算出手段Ｄである。
11 は前記算出手段Ｄ９により算出された移動距離に基づいて位置決めできるスピンドル２と作業テーブル１とを同期移動させ、このスピンドル２の移動量が前記算出手段Ｃ８により算出されたテーパー部 5a の加工距離Ｌ１に到達した時点でスピンドル２のみが単独で下降移動して垂直部 5b を加工するように制御する制御手段Ａ、 10 はその制御手段Ａ 11 に基づいてスピンドル２及び作業テーブル１を位置決めできる制御がされて同期させる駆動機構Ａ、 16 は前記算出手段Ｂにより算出された加工分割回数である割出し数に基づく駆動機構Ａ 10 による作業テーブル１の移動に追動させながらその移動に伴い変わる研削砥石３の当り面を常に加工輪郭面５に対し法線方向に向けるようにスピンドル軸（Ｃ軸）で砥石軸を偏向させ、このスピンドル軸による偏向を駆動機構Ａによる作業テーブル１の移動に同期させる制御手段Ｂであり、 15 は、その制御手段Ｂ 16 に基づいて、研削砥石３の当り面を常に被研削物４の加工輪郭面５に対して方線方向に向けるようにスピンドル軸（Ｃ軸）で砥石軸を偏向方向に偏向させる駆動機構Ｂである。
即ち、算出手段Ａ〜Ｄ６，７，８，９により設定される加工条件（内容を含む）に基づく制御手段Ａ 11 による駆動機構Ａ 10 で作業テーブル１の左右・前後方向の動きとスピンドル２の上下方向の動き、そして制御手段Ｂ 16 の制御による駆動機構Ｂ 15 で研削砥石３の当り面を常に加工輪郭面５に対し法線方向に向けるようにスピンドル軸による砥石軸を偏向方向へ偏向する制御駆動とによって実行されて、多角形形状を呈する被研削物４の加工輪郭面５の上下に連なるテーパー部 5a と垂直部 5b との連続加工が同時に行なわれるように構成している。
【００１４】
上記した算出手段Ａ〜Ｄ６，７，８，９は、中央処理装置（ＣＰＵ）に接続されているメモリに入力され、被研削物の加工輪郭面の長さ、その被研削物のＸ方向の設計値、同Ｙ方向の設計値、同コーナーＲの半径、そして被研削物の直線部の長さ、コーナーＲの長さ、それらの加工輪郭面の加工分割回数である割出し数、更に前記各辺直線部のＸ軸移動量とＹ軸移動量、コーナーＲのＸ軸移動量とＹ軸移動量、テーパー部及び垂直部のＺ軸移動量等を各算出し、中層処理装置で処理される方式である。
例えば算出手段Ａ６による多角形形状を呈する被研削物４の加工輪郭面５の長さを算出する場合は、Ｘ軸方向又はＹ軸方向の長さ、即ち被研削物４の長辺方向Ｌ３又は短辺方向Ｌ４の長さをメモリに記憶されている設計値寸法より算出（演算）し得る。
尚、算出は、中央処理装置（ＣＰＵ）に入力されて算出（演算）処理されるように構成してある。そして、これら算出手段Ａ〜Ｄ６，７，８，９により算出される上記した各種のデータは中央処理装置（ＣＰＵ）に接続されているＲＡＭに記憶される。
【００１５】
制御手段Ａ11は、Ｚ軸サーボモーターZ-1 によるスピンドル２の下降移動量が、前記算出手段Ｃ８により算出されたテーパー部5aの加工距離Ｌ１に到達した時点で、スピンドル２のみが単独で下降移動してテーパー部5aに連なる垂直部5bを加工するように駆動機構Ａを制御する。
即ち、算出手段Ｄ９により算出された移動距離に基づきＺ軸サーボモーターA-3 により位置決めできるスピンドル２を下降移動させながら、この動きに同期させて行なうテーパー部5aの研削加工と、このテーパー加工が終了した時点で同期するＸ軸サーボモーターX-1 又はＹ軸サーボモーターY-1 による作業テーブル１の左右又は前後方向の移動を止めてスピンドル２のみがその動きを止めることなく下降移動して垂直部5bを加工するように、そしてスピンドル１が単独で上昇移動して垂直部5bを加工し、その動きを止めることなく再びテーパー部5aの加工に入る時には該動きにＸ軸サーボモーターX-1 又はＹ軸サーボモーターY-1 による作業テーブル１の左右又は前後方向の移動を前記算出手段Ｄ９により算出された移動距離に基づき同期させる働きをなす。
【００１６】
駆動機構Ａ10は、中央処理装置（ＣＰＵ）に適宜の構成（電気）機器を介して接続され、作業テーブル１を左右方向に移動させるＸ軸サーボモーターA-1 と前後方向に移動させるＹ軸サーボモーターY-1 、そしてスピンドル２を上下方向に移動させるＺ軸サーボモーターZ-1 で、これら各サーボモーターX-1 ，Y-1 ，Z-1 は駆動回路等の適宜の構成機器を介して中央処理装置（ＣＰＵ）に接続され、該装置（ＣＰＵ）からの出力信号（データ）により作動せしめて、Ｘ軸サーボモーターX-1 はテーブル１を左右（横）方向に移動させる動きを与えると共に、Ｙ軸サーボモーターY-1 はテーブル１を前後方向に移動させる動きを与え、そしてＺ軸サーボモーターZ-1 はスピンドル２を上下方向に移動される動きを与えるように構成してある。
ちなみに、Ｘ軸・Ｙ軸両サーボモーターX-1 ，Y-1 は、ボールネジとボールナットとにより作業テーブル１の裏面において該テーブル１に連繋されており、そして、Ｚ軸サーボモーターZ-1 はボールネジとボールナット及びその他の連結部材によりスピンドル２を垂直に支持する昇降枠機構に連繋されている。
【００１７】
上記自動切込み装置12は、被研削物４の加工輪郭面５に沿って研削砥石３が一周した時点で、継続して行なう該加工輪郭面５に対する砥石３の１回当たりの切込み量を、予め設定されている“総切込み量”に到達するまで自動的に変更する働きをなすもので、Ｕ軸サーボモーターU-1 によるボールネジの回転に伴うボールナットの上下移動を、ガイド傾斜面に沿って横方向即ちＵ軸方向（砥石３の切込み方向）に変換するボールナットに連結させた楔形状の方向変換部材により砥石３を切込み方向に移動させるように構成してある。
即ち、研削砥石３を高周波モーター13へ着脱自在に取り付け、該研削砥石３を所定の回転数（ｒｐｍ）にて駆動回転させる高周波モーター13を、支持するスピンドル２下端のスライド部材 14 の移動量の設定で研削砥石３の切込みがされ、スピンドル軸（Ｃ軸）により砥石軸が偏向させるように構成してある。
そして、Ｕ軸サーボモーターU-1 は中央処理装置（ＣＰＵ）に駆動回路等の適宜の構成機器を介して接続され、該装置（ＣＰＵ）からの出力信号（データ）に基づいて作動せしめて、上記した動きを与えるようにしてある。
【００１８】
上記制御手段Ｂ16は、スライド部材 14 によってスピンドル２のスピンドル軸（Ｃ軸）で砥石軸を偏向させるＣ軸サーボモーター C-1 により上記したように砥石３の当り面が常に加工輪郭面５に対し直角に向くように偏向させるその偏向を、算出手段Ｂ７により算出された加工輪郭面５の直線部及びコーナーＲの加工分割回数による割出し部分に、スピンドル２の上下往復移動によって直線部からコーナーＲに達した時点で駆動機構Ａ 10 のＸ軸サーボモーター X-1 とＹ軸サーボモーター Y-1 による作業テーブル１の移動に同期させて、同期動作をする制御がされる。そして、コーナーＲの加工分割回数終了により偏向が解除される働きをなす。
【００１９】
上記駆動機構Ｂ15は、中央処理装置（ＣＰＵ）に適宜の構成（電気）機器を介して制御手段Ａ11に接続され、Ｘ軸サーボモーターX-1 とＹ軸サーボモーターY-1 による作業テーブル１の左右・前後方向の移動と、スピンドル２の上下方向のＺ軸サーボモーターZ-1による移動で加工輪郭面５のテーパ-部と垂直部との連続加工され、これに同期して研削砥石３の当り面が常に加工輪郭面５に対し法線方向に向くようにスピンドル軸（Ｃ軸）で砥石軸を偏向させる。それは、スピンドル２のＣ軸サーボモーターC-1 で偏向させ、これを駆動回路等の適宜の構成機器を介して中央処理装置（ＣＰＵ）に接続し、該装置（ＣＰＵ）からの出力信号（データ）により作動せしめて、砥石３の偏向方向を常に加工輪郭面５に対し直角に（法線方向に）向けるようにスピンドル軸（Ｃ軸）を偏向させる役目をなす。
【００２０】
上記した実施例における駆動機構Ｂ 15 はスピンドル２がＣ軸サーボモーター C-1 により砥石軸３の当り面が常に加工輪郭面５に対し法線方向に向くようにスピンドル軸（Ｃ軸）を偏向させるその偏向が、駆動機構Ａ 10 のＸ軸サーボモーター X-1 とＹ軸サーボモーター Y-1 による作業テーブル１の移動に同期させる制御手段Ｂ 16 を備えたものである。
即ち、平面矩形形状を呈し、コーナーが角状である被研削物４の各辺直線部にテーパー部 5a と垂直部 5b とを上下に連なる加工輪郭面５を夫々周方向に連設させて連続加工する際、Ｘ軸サーボモーター X-1 又はＹ軸サーボモーター Y-1 による作業テーブル１の左右又は前後方向と、これに同期するＺ軸サーボモーター Z-1 によるスピンドル２の上下方向の往復移動とでテーパー部５ a と垂直部 5b とが連ねて連続加工され、このようにして、これに同期したＸ軸サーボモーター X-1 とＹ軸サーボモーター Y-1 による作業テーブル１の左右・前後両方向の移動で直線的な各辺直線部の加工輪郭面５を研削する。即ち遊星回転させずに制御手段Ｂ 16 を備えたものである。そして、自動切込み装置 12 のＵ軸サーボモーター U-1 による研削砥石３の切込み方向（当り面）を常に法線方向に向ける方向補正を行なう。
【００２１】
そこで、リング形状を呈する被研削物４の場合、円周加工輪郭面５や多角形形状の被研削物のコーナーが円弧状でコーナーＲの加工輪郭面５に研削砥石３を沿わせて上記したテーパー部 5a と垂直部 5b とを連続加工する際には、Ｘ軸サーボモーター X-1 とＹ軸サーボモーター Y-1 による作業テーブル１の左右・前後方向の移動と、スピンドル２の上下方向の移動である駆動機構Ａ 10 に同期して研削砥石３の当り面を常に加工輪郭面５に対し法線方向に向けるようにスピンドル軸（Ｃ軸）が、前記作業テーブル１の左右・前後方向の移動に追動させて偏向させる動きを与えるものである。
【００２２】
次に、以上の如く構成されたＣＮＣ治具研削盤の駆動制御装置による被研削物４の研削加工の一実施例を説明する。
図４乃至図７及び図９乃至図 11 は、図 14 に示した平面矩形形状を呈し、コーナーが円弧状のリング状被研削物４の外側加工輪郭面５に上下に連なるテーパー部5aと垂直部5bを、内側加工輪郭面5-1 に外向き傾斜のテーパー部5a-1と内向き傾斜のテーパー部5a-2（逆向きテーパー部）を加工する場合の動作の一例を示すフローチャートであり、これらのフローチャートは、中央処理装置（ＣＰＵ）のＲＯＭに記憶されている制御プログラムを実行することにより進行するＲＡＭに関するものである。
即ち、被研削物４の外側加工輪郭面５の各辺直線部と四隅コーナーＲへのテーパー部5aと垂直部5bの加工、そして内側加工輪郭面5-1 への外向き傾斜のテーパー部5a-1の加工、最後に内側加工輪郭面5-1 への内向き傾斜のテーパー部5a-2の加工が一連の動作により自動的に行なわれる。
【００２３】
作業者が研削盤の起動操作スイッチを入れると、算出手段Ａ６による被研削物４の外側加工輪郭面５の長辺と短辺の直線部の長さＬ３，Ｌ４とコーナーＲの円弧長さが算出されると共に、算出手段Ａ６により算出された直線部の長さＬ３，Ｌ４とコーナーＲの円弧長さに基づき該直線部と四隅コーナーＲの加工分割回数である割出し数が算出手段Ｂ７により算出される。
次に、直線部とコーナーＲのテーパー部5aの加工距離Ｌ１とこのテーパー部5aに連なる垂直部5bの加工距離Ｌ２が算出手段Ｃ８により算出され、最後に直線部とコーナーＲの垂直部 5b に対するテーパー部5aのテーパー角度θに基づきスピンドル２の上下と作業テーブル１の左右・前後の移動距離が算出手段Ｄ９により算出されてＲＡＭに記憶される。
【００２４】
算出手段Ａ〜Ｄ６，７，８，９により算出され設定された加工条件（内容を含む）がＲＡＭに記憶されると、ＲＡＭに予めプログラムメモリにて記憶させておいた図５に示すフローチャートのステップ順にて、まず初めに奥側直線部（図８（イ）において上側）のプログラムメモリが呼び出される（ステップ20）。
【００２５】
奥側直線部のプログラムが呼び出されると、図５のフローチャートに示すように直線部の加工分割回数である上記割出し数に基づきスピンドル２の上下往復移動回数をカウントするカウンタの初期化が行なわれる（ステップ31）。本実施例においてスピンドル２が上下に１往復することで加工分割回数の割出し数、１回を更新するようにしてある。例えば加工分割回数が５の場合、スピンドル２が上下に５往復することで繰り返しカウンタが更新される。
【００２６】
カウンタの初期化が行なわれると、高周波モーター13が作動して研削砥石３を回転させ、Ｘ軸サボモーターX-1 、Ｙ軸サーボモーターY-1 、Ｚ軸サーボモーターZ-1 が作動を開始して作業テーブル１を左右（Ｘ軸）・前後（Ｙ軸）方向に移動させ、この移動に同期させてスピンドル２を下降（Ｚ軸）移動させてテーパー部5aの加工（ステップ32）、垂直部5bの加工（ステップ33）が行われると共に、スピンドル２を上昇（Ｚ軸）移動させて垂直部5bの加工（ステップ34）、テーパー部5aの加工（ステップ35）が、上記奥側直線部の加工分割回数の割出し数に基づき該分割回数分、カウンタが更新される（ステップ36）まで繰り返し行なわれる（図７参照）。
この時点で繰り返しカウンタが、加工分割回数の割出し数より小さいか否かを判断し（ステップ37）、大きい場合には今回移動したテーブル１の左右（Ｘ軸）移動距離を算出する（ステップ38）と共に、残りの移動距離を算出する（ステップ39）。残り移動距離の有無を判断し（ステップ40）、残りの移動距離がある場合にはその残りの移動距離を２分割して（ステップ41）スピンドル２を作業テーブル１の移動に同期させて再び上下往復移動させる（ステップ42〜45）ことで、奥側直線部の加工輪郭面５に対するテーパー部5aと垂直部5bの加工が終了となる。
【００２７】
奥側直線部の加工が終了すると、次に左奥コーナーＲ（図８（イ）において上側左）のプログラムメモリが呼び出される（ステップ21）。
左奥コーナーＲのプログラムが呼び出されると、図６のフローチャートに示すようにコーナーＲの上記加工分割回数の割出し数に基づきスピンドル２の上下往復移動回数をカウントするカウンタの初期化が行なわれる（ステップ50）。
【００２８】
カウンタの初期化が行なわれると、高周波モーター13が作動して研削砥石３を回転させ、Ｘ軸サーボモーターX-1 、Ｙ軸サーボモーターY-1 、Ｚ軸サーボモーターZ-1 が作動を開始すると共に、制御手段Ｂ16によりＣ軸サーボモーターC-1 をも作動を開始し、作業テーブル１の左右（Ｘ軸）・前後（Ｙ軸）方向の移動に同期させて研削砥石３の当り面が常に加工輪郭面５に対し法線方向に向くようにスピンドル軸（Ｃ軸）で砥石軸を偏向させるＣ軸制御が制御手段ＢによるＣ軸サーボモーター C-1 により行われ、スピンドル２を下降（Ｚ軸）移動させてテーパー部5aの加工（ステップ51）、垂直部5bの加工（ステップ52）を行うと共に、スピンドル２を上昇移動させて垂直部5bの加工（ステップ53）、テーパー部5aの加工（ステップ54）を上記コーナー部の加工分割回数である割出し数に基づき、該割出し数、カウンタが更新される（ステップ55）まで繰り返し行なわれる。
この時点で繰り返しカウンタが加工分割回数である割出し数より小さいか否かを判断し（ステップ56）、大きい場合には再度上記した動作を繰り返すことで左奥コーナー部の加工輪郭面５に対するテーパー部5aと垂直部5bの加工が終了となる。
【００２９】
左奥コーナー部の加工が終了すると、次に左側直線部（図８（イ）において左側）のプログラムメモリが呼び出される（ステップ22）。
左側直線部のプログラムが呼び出されると、図７のフローチャートに示すように左側直線部の上記加工分割回数である割出し数に基づきスピンドル２の上下往復移動回数をカウントするカウンタの初期化が行なわれる（ステップ31）。
カウンタの初期化が行なわれると、以後は上記した奥側直線部のステップ32〜35順にて左側直線部の加工分割回数である割出し数に基づき該割出し数、カウンタが更新される（ステップ36）まで繰り返し行なわれる。
即ち、左側直線部の加工にあってはステップ37による判断により繰り返しカウンタが加工分割回数である割出し数より大きい場合には今回移動したテーブル１の前後（Ｙ軸）移動距離を算出し（ステップ60）。ステップ60を得ることで、左側直線部の加工輪郭面５に対するテーパー部5aと垂直部5bの加工が終了となる。
【００３０】
以後は、左手前コーナーＲ（図８（イ）において下側左）のプログラムメモリ（ステップ23）、手前直線部（図８（イ）において下側）のプログラムメモリ（ステップ24）、右手前コーナーＲ（図８（イ）において下側右）のプログラムメモリ（ステップ25）、右側直線部（図８（イ）において右側）のプログラムメモリ（ステップ26）、右奥コーナーＲ（図８（イ）において上側右）のプログラムメモリ（ステップ27）を呼び出して、上記した如く図５乃至図７に夫々示すフローチャートにより実行することで、各辺直線部と四隅コーナーＲに対するテーパー部5aと垂直部5bの加工が終了となる。
最後に、ニゲＲのプログラムメモリを呼び出し（ステップ28）、そしてＸ軸サーボモーターX-1 、Ｙ軸サーボモーター Y-1 、Ｚ軸サーボモーターZ-1 、Ｃ軸サーボモーターC-1 が作動してスピンドル２を原点位置まで移動させて戻す（ステップ29）と共に、作業テーブル１及び砥石３の向きを原点位置まで移動させて戻す（ステップ30）ことによって、被研削物４の外側加工輪郭面５の加工が終了する。
【００３１】
被研削物４の外側加工輪郭面５の加工が終了すると、内側加工輪郭面5-1 への外向き傾斜のテーパー部5a-1の加工に入り、ＲＡＭに予めプログラムメモリにて記憶させておいた図９に示すフローチャートのステップ順にて、まず初めにアプローチコーナーＲ（図13（イ）において下側左）のプログラムメモリが呼び出され（ステップ70）、該コーナーＲの加工分割回数を２分割する（ステップ71）。同コーナーＲの２分割後、アプローチＲの角度指示して左手前コーナーＲのプログラムを呼び出す（ステップ72）。
左手前コーナーＲのプログラムが呼び出されると、図11のフローチャートに示すように同コーナーＲの加工分割回数に基づきスピンドル２の上下往復移動回数をカウントするカウンタの初期化が行なわれる（ステップ90）。
【００３２】
カウンタの初期化が行なわれると、高周波モーター13が作動して研削砥石３を回転させ、Ｘ軸サーボモーターX-1 、Ｙ軸サーボモーターY-1 、Ｚ軸サーボモーターZ-1 及び制御手段Ｂ16によるＣ軸サーボモーターC-1 が作動を開始して、作業テーブル１の左右（Ｘ軸）・前後（Ｙ軸）方向の移動に同期して研削砥石３の当り面が常に加工輪郭面5-1 に対し法線方向に向くようにスピンドル軸（Ｃ軸）で砥石軸を偏向させると共に、スピンドル２を下降（Ｚ軸）移動させてテーパー部5a-1の加工（ステップ91）を行なうと共に、スピンドル２を上昇させてテーパー部5a-1の加工（ステップ92）を上記コーナー部の加工分割回数である割出し数に基づき該割出し数、カウンタが更新する（ステップ93）まで繰り返し行なう。
この時点で繰り返しカウンタが加工分割回数である割出し数より小さいか否かを判断し（ステップ94）、大きい場合には再度上記したステップ91〜93を繰り返すことで左奥コーナー部の加工輪郭面5-1 に対するテーパー部5a-1の加工が終了となる。
【００３３】
左手前コーナーＲの加工が終了すると、次に左側直線部（図13（イ）において左側）のプログラムメモリが呼び出される（ステップ73）。左側直線部のプログラムが呼び出されると、図12のフローチャートに示すように左側直線部の上記加工分割回数である割出し数に基づきスピンドル２の上下往復移動回数をカウントするカウンタの初期化が行なわれる（ステップ100 ）。
【００３４】
カウンタの初期化が行なわれると、高周波モーター13が作動して砥石３を回転させ、Ｘ軸サーボモーターX-1 、Ｙ軸サーボモーターY-1 、Ｚ軸サーボモーターZ-1 が作動を開始して作業テーブル１を左右（Ｘ軸）・前後（Ｙ軸）方向の移動に同期させてスピンドル２を下降（Ｚ軸）移動させてテーパー部5a-1の加工（ステップ101 ）を行なうと共に、スピンドル２を上昇させてテーパー部5aの加工（ステップ102 ）を上記コーナー部の加工分割回数である割出し数に基づき該割出し数、カウンタが更新する（ステップ103 ）まで繰り返し行なう（図10参照）。
この時点で繰り返しカウンタが加工分割回数である割出し数より小さいか否かを判断し（ステップ104 ）、大きい場合には今回移動したテーブル１の前後（Ｙ軸）移動距離を算出する（ステップ105 ）と共に、残りの移動距離を算出する（ステップ106 ）。残り移動距離の有無を判断し（ステップ106 ）、残りの移動距離がある場合にはその残りの移動距離を２分割して（ステップ107 ）スピンドル２を作業テーブル１の移動に同期させて再び上下往復移動させる（ステップ109 〜110 ）ことで、左側直線部の加工輪郭面5-1 に対するテーパー部5a-1の加工が終了となる。
【００３５】
以後は、左奥コーナーＲ（図13（イ）において上側左）のプログラムメモリ（ステップ74）、奥側直線部（図13（イ）において上側）のプログラムメモリ（ステップ75）、右奥コーナーＲ（図13（イ）において上側右）のプログラムメモリ（ステップ76）、左側直線部（図13（イ）において左側）のプログラムメモリ（ステップ77）、右手前コーナーＲ（図14（イ）において下側右）のプログラムメモリ（ステップ78）、手前直線部（図14（イ）において下側）のプログラムメモリ（ステップ79）、そしてコーナーＲの加工分割回数を２分割する（ステップ80）。
同コーナーＲの２分割後、アプローチＲの角度を指示して左手前コーナーＲのプログラムメモリ（ステップ81）を呼び出して、上記した如く図10乃至図11に夫々示すフローチャートにより実行することで、各辺直線部と四隅コーナーＲに対するテーパー部5a-1の加工が終了となり、最後にニゲＲのプログラムメモリを呼び出し（ステップ82）及びスピンドル軸（Ｃ軸）の数値更新（ステップ83）、そしてＸ軸サーボモーターX-1 、Ｙ軸サーボモーターY-1 、Ｚ軸サーボモーターZ-1 、Ｃ軸サーボモーターC-1 が作動してスピンドル２を原点位置まで移動させて戻す（ステップ84）と共に、作業テーブル１及び砥石３の向きを原点位置まで移動させて戻す（ステップ85）ことによって、被研削物４の内側加工輪郭面5-1 の外向き傾斜のテーパー部5a-1の加工が終了する。
【００３６】
被研削物４の内側加工輪郭面5-1 の外向き傾斜のテーパー部5a-1の加工が終了すると、内側加工輪郭面5-1 への内向き傾斜のテーパー部5a-2の加工に入り、上記したように図９に示すフローチャートのステップ73〜81順にて図10乃至図11に夫々示すフローチャートが呼び出されて、各辺直線部と四隅コーナーＲに対する内向き傾斜のテーパー部5a-2の加工が終了となる（図13 及び図 14参照）。
【００３７】
而して、本発明ＣＮＣ治具研削盤の駆動制御装置によれば、作業テーブル１を左右・前後に移動させるＸ軸，Ｙ軸、スピンドル２を上下に移動させるＺ軸の三次元制御（同時三軸制御）が可能となり、平面視略矩形形状を呈する被研削物４の各辺直線部に上下に連なるテーパー部5aと垂直部5bとを同時に連続加工することができる。しかもこれらＸ軸，Ｙ軸，Ｚ軸の同時三軸制御に加えて、作業テーブル１の左右・前後の移動に追動させながらその移動に伴い変わる研削砥石３の当り面を常に被研削物４の加工輪郭面５に対し法泉方向に向けるようにスピンドル軸（Ｃ軸）で砥石軸を偏向させるＣ軸をも同時に制御する四次元制御（同時四軸制御）が可能となり、それにより、前記被研削物４の四隅コーナーＲにおいても上下に連なるテーパー部 5a と垂直部 5b とを同時に連続加工することができる。更には円錐，外向きテーパー，内向きテーパー（逆向きテーパー部），底面，コーナーＲ面等をも同時に連続加工することができる。
【００３８】
【発明の効果】
本発明ＣＮＣ軸研削盤の駆動制御装置は叙上の如く構成してなるから、下記の効果を奏する。
作業テーブルを左右・前後に移動させるＸ軸，Ｙ軸、スピンドルを上下に移動させるＺ軸の三次元制御（同時三軸制御）に加えて、作業テーブル１の左右・前後の移動に追動させながらその移動に伴い変わる研削砥石の当り面を常に被研削物の加工輪郭面に対し法線方向に向けるようにスピンドル軸で砥石軸を偏向させるＣ軸をも同時に制御される四次元制御（同時四軸制御）が可能であることから、平面多角形形状を呈し、コーナーが円弧状である被研削物の加工輪郭面の各辺直線部及びコーナーＲに、高周波モーターにより独自に駆動回転する研削砥石を沿わせながら、上下に連なるテーパー部と垂直部とを同時に連続加工することができる。
また、リング状被研削物の外側加工輪郭面のみならず、内側加工輪郭面においても上下に連なるテーパー部と垂直部との同時連続加工が可能であり、更には円錐，垂直，外向きテーパー，内向きテーパー（逆向きテーパー），底面，コーナーＲ面等をも連続加工することができる被研削物の加工輪郭面形状に制限されることなく、それらの加工輪郭面に上下に連なるテーパー部と垂直部を同時に連続加工することができることで、加工時間の大幅な短縮化と無人運転が可能となり、同時に高精度にてテーパー部、垂直部等を連続して研削加工することができる。
【図面の簡単な説明】
【図１】ＣＮＣ治具研削盤の外観（全体）を示した側面図
【図２】同正面図
【図３】本発明ＣＮＣ治具研削盤の駆動制御装置の実施の一例を示す機能ブロック図
【図４】本発明ＣＮＣ治具研削盤の駆動制御装置の一実施例を示す外側加工輪郭面にテーパー部と垂直部を加工する動作フローチャート
【図５】同外側加工輪郭面のＸ軸方向の直線部にテーパー部と垂直部を加工する動作フローチャート
【図６】同外側加工輪郭面のコーナーＲにテーパー部と垂直部を加工する動作フローチャート
【図７】同外側加工輪郭面のＹ軸方向の直線部にテーパー部と垂直部を加工する動作フローチャート
【図８】同フローチャートによる加工状態を示した被研削物の概略図で、（イ）は平面図、（ロ）はその一部を示した正面図
【図９】内側加工輪郭面にテーパー部を加工する動作フローチャート
【図１０】同内側加工輪郭面の直線部にテーパー部を加工する動作フローチャート
【図１１】同内側加工輪郭面のコーナーＲにテーパー部を加工する動作フローチャート
【図１２】同フローチャートによる外向き傾斜のテーパー部の加工状態を示した被研削物の概略図で、（イ）は平面図、（ロ）はその一部を示した正面図
【図１３】同フローチャートによる内向き傾斜のテーパー部（逆向きテーパー部）の加工状態を示した被研削物の概略図で、（イ）は平面図、（ロ）はその一部を示した正面図
【図１４】本発明ＣＮＣ治具研削盤の駆動制御装置の一実施例により加工した被研削物を示し、（イ）は平面図、（ロ）は同縦断面図
【符号の説明】
１…作業テーブル２…スピンドル
３…砥石４…被研削物
５…加工輪郭面６…算出手段Ａ
７…算出手段Ｂ８…算出手段Ｃ
９…算出手段Ｄ 10…駆動機構Ａ
11…制御手段Ａ 12 …自動切込み装置
13 …高周波モーター 14 …スライド部材
15…駆動機構Ｂ 16…制御手段Ｂ[0001]
[Industrial applications]
The present invention relates to a corner placed and set on a work table moving left, right,Moving the table, the vertical movement of the grinding wheel by the vertical movement of the spindle, and deflecting the grinding wheel axis by the spindle axis, By the movement by the automatic cutting device having a slide member for setting the cutting amount, it is independently driven and rotated by a high-frequency motor supported via the slide member.Along the grinding wheel,A CNC jig grinder for continuously machining a vertically tapered portion and a vertical portion, particularly a machining operation for continuously machining a vertically tapered portion and a vertical portion.CNC jig grinder related to controlThe present invention relates to a drive control device.
[0002]
[Prior art and its problems]
Conventionally, this type of CNC jig grinder is used for machining a work contour surface of an object to be ground mounted and set on a work table.In the case where the taper portion and the vertical portion are vertically connected to each other for grinding, even if the spindle for vertically reciprocating the grinding wheel is vibrated up and down, there is no device capable of controlling the vertical movement of the spindle and positioning.
Therefore, in the conventional grinding machine,First, adjust the angle of the spindle with the grinding wheel to the taper angle of the tapered part to be machined from a vertical position., The work table is moved in the left and right and front and back directions by the NC command from the NC device, and the grinding wheel is moved by the vertical vibration of the spindle. Processing along the processing surface,After the processing of the tapered portion is completed, the spindle is returned to the original vertical position, and the vertical portion connected to the tapered portion is processed.
[0003]
But conventional grinders,The drive for moving the work table on which the workpiece is placed in the left / right and front / rear directions, ie, the X-axis direction and the Y-axis direction, can be automatically driven by the NC command, but the spindle supporting the grinding wheel is moved in the vertical direction, ie, the Z-axis. The drive to reciprocate in the direction is performing mechanical reciprocation by cylinder etc.,Z-axis positioning control is not possible,It is possible to process only the tapered portion or only the vertical portion alone, but it is not possible to continuously process both.
That is, since the conventional grinder is a two-dimensional control that enables only the X-axis and Y-axis driving units for moving the table to be automatically operated, the tapered part and the vertical part on the processing surface of the workpiece are grounded. Continuous processing was not possible.
[0004]
In addition, in a conventional grinding machine, a straight line portion and a corner of each side are formed on a processing contour surface of an object to be ground having a planar polygonal shape.In order to perform processing, a setup for changing the angle of the spindle must be performed.
That is,Setup for processing the straight part on each side, and the straight partAfter finishing the machiningCorner and its adjacent verticalThe work efficiency is extremely poor because the setup for machining must be performed, and the machining of the tapered part and the vertical part must be performed in two steps.FurtherThere is a problem that it becomes longer.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of such conventional circumstances,The processing contour surface of the workpiece to be groundVertical and vertical taper sectionsAnd this taper - Part and vertical partFor continuous machiningIn addition, the straight part and the corner of each side can be moved continuously.Accordingly, it is an object of the present invention to provide a drive control device for a CNC jig grinding machine, which can reduce the processing time and enable unmanned operation.
[0006]
[Means for achieving the object]
The technical measures taken by the present invention to achieve the above object are described in claim 1.The work table is moved on the work contour surface of a workpiece having a planar polygonal shape placed and set on a work table that moves left and right and back and forth (moves in the X-axis and Y-axis) and has a rounded corner. A vertical movement (Z-axis movement) of the grinding wheel by the vertical movement of the spindle; and a slide member at the lower end of the spindle for deflecting the grinding wheel axis by the spindle axis (C axis) and setting a cutting amount. The automatic cutting device is moved (U-axis movement), and the high-frequency motor supported via the slide member drives and rotates the grindstone, which is independently driven, while simultaneously processing the tapered portion and the vertical portion connected vertically one after the other. CNC jig grinding machine,
Calculating means A for calculating the length of each side straight portion and the arc length of each corner R of the machining contour surface of the workpiece from the design value dimensions, and the straight side portion of each side of the workpiece calculated by the calculating means A Calculating means B for calculating the indexing number, which is the number of machining divisions of the straight line portion and the corner R, based on the length of the arc and the arc length of each corner R, the taper of the straight line portion of each indexed portion and the corner R Means for calculating the machining distance of the vertical portion and the machining distance of the vertical portion connected to the tapered portion from the design value dimensions, and the spindle and the work table based on the taper angle of the linear portion and the tapered portion of the corner R with respect to the vertical portion. Calculating means D for calculating a moving distance synchronized with the spindle, based on the moving distance calculated by the calculating means D, synchronously moving the worktable spindle and the work table; At the time when the amount of movement reaches the processing distance of the tapered portion calculated by the calculating means C, the control means A controls only the spindle to move alone to process the vertical part, based on the control means A, A drive mechanism A for synchronously moving and positioning the spindle and the work table, and a movement of the work table by the drive mechanism A based on the indexing number, which is the number of processing divisions of each side linear portion and the corner R calculated by the calculating means B. Follow-up The grinding wheel axis is deflected in the deflection direction by the spindle shaft so that the contact surface of the grinding wheel, which changes with the movement, is always directed in the normal direction to the processing contour surface of each side straight part and the corner R while being moved. A control means B for synchronizing the deflection with the movement of the work table by the drive mechanism A. On the basis of the control means B, a spindle is provided so that the contact surface of the grinding wheel is always directed in the normal direction to the processing contour surface of the workpiece. Drive mechanism B that deflects the grinding wheel axis with the axis and grindsIt is characterized by having.
[0007]
In claim 2,The work table moves on the work contour surface of a workpiece having a rectangular shape in a plane, which is set and placed on a work table that moves left and right and back and forth (moves in the X-axis and Y-axis) and has corners with corners. A vertical movement (Z-axis movement) of the grinding wheel by vertical movement of the spindle, and a slide member for deflecting the grinding wheel axis by a spindle axis (C axis) at the lower end of the spindle and setting a cutting amount. By the movement of the automatic cutting device (U-axis movement), the high-frequency motor supported via a slide member drives and rotates the grindstone that rotates independently, and simultaneously successively processes the tapered part and the vertical part connected vertically. CNC jig grinding machine,
Calculation means A for calculating the length of each side straight line portion of the processing contour surface of the workpiece from the design value dimensions, based on the length of each side straight line portion of the workpiece calculated by the calculation means A Calculating means B for calculating an indexing number which is the number of divisions; calculating means C for calculating a machining distance of a tapered portion of each indexed portion and a machining distance of a vertical portion connected to the tapered portion from a design value dimension; A calculating means D for calculating a synchronous moving distance between the spindle and the working table based on the taper angle of the tapered portion with respect to the vertical part, and the spindle and the working table which can be positioned based on the moving distance calculated by the calculating means D; When the amount of movement of the spindle reaches the machining distance of the tapered portion calculated by the calculating means C, only the spindle alone moves to add the vertical portion. A driving mechanism A for synchronously positioning the spindle and the work table based on the control means A, and a dividing number, which is the number of processing divisions of each side straight portion calculated by the calculating means B. Following the movement of the work table by the drive mechanism A based on the number of outputs, the grinding wheel axis is deflected by the spindle axis so that the contact surface of the grinding wheel always faces in the normal direction to the processing contour surface of each side straight portion. A control means B for synchronizing the deflection by the spindle shaft with the movement of the work table by the drive mechanism A, based on the control means B, the contact surface of the grinding wheel is always in the normal direction to the processing contour surface of the workpiece. The drive mechanism B that performs the deflection toward the grinding by deflecting the grinding wheel axis by the spindle axisIt is characterized by having.
[0008]
Furthermore,According to a third aspect of the present invention, the work table is moved on the work contour surface of the work to be ground which exhibits a plane ring placed and set on the work table which moves left and right and back and forth (moves in the X and Y axes). Up and down movement (Z-axis movement) of the grinding wheel by up and down movement, and an automatic cutting device equipped with a slide member for deflecting the grinding wheel axis by a spindle shaft (C axis) at the lower end of the spindle and setting a cutting amount. Jig which continuously processes the tapered part and the vertical part which are connected up and down at the same time while moving the grinding wheel which is independently driven and rotated by the high frequency motor supported via the slide member by the movement of the U-axis A grinder,
Calculating means A for calculating the ring circumferential length of each side straight portion of the processing contour surface of the workpiece from the design value dimensions, based on the ring circumferential length of the workpiece calculated by the calculating means A, Calculating means B for calculating the indexing number which is the number of machining divisions, calculating means C for calculating the machining distance of the tapered portion of each indexed portion and the machining distance of the vertical portion connected to the tapered portion from the design value dimensions. Calculating means D for calculating a synchronous moving distance between the spindle and the working table based on the taper angle of the tapered portion with respect to the vertical part, and the spindle and the working table which can be positioned based on the moving distance calculated by the calculating means D Are synchronized with each other, and when the movement amount of the spindle reaches the machining distance of the tapered portion calculated by the calculation means C, only the spindle alone moves and hangs. Control means A for controlling to process the parts, on the basis of the control unit A, the driving mechanism for moving and positioning synchronized spindle and the work table A, before While following the movement of the work table by the drive mechanism A based on the indexing number which is the number of processing divisions of the ring circumference calculated by the calculating means B, the contact surface of the grinding wheel that changes with the movement is always changed. A control means B for deflecting the grinding wheel axis in a deflecting direction by a spindle axis so as to be directed in the normal direction to the processing contour surface of the ring circumference, and synchronizing the deflection by the spindle axis with the movement of the work table by the drive mechanism A; On the basis of the control means B, a drive mechanism B for deflecting the grinding wheel axis with the spindle axis so that the contact surface of the grinding wheel is always directed in the normal direction to the processing contour surface of the ring circumference and grinding is provided.It is characterized by having.
[0009]
[Action]
Thus, according to the technical means described in claim 1 described above,A spindle for supporting a slide member in an automatic cutting device via a high-frequency motor so that the work table on which the workpiece is placed and set can be moved left and right and back and forth (movement in the X and Y axes) and the grinding wheel can be independently driven and rotated via a high frequency motor. The vertical movement (Z-axis movement) is executed by the drive control of the drive mechanism A by the control means A based on the processing conditions (including the contents) calculated and set by the calculation means A to D, and grinding by the drive mechanism A. The deflection of the grindstone axis with respect to the spindle axis (C axis), which always directs the contact surface of the grindstone in the normal direction to the processing contour surface, is performed by the slide member and the table is moved by the drive mechanism A (X-axis, Y-axis movement). Executed by the control means B for synchronizing, the corner R of the object to be ground having a circular arc shape and a plane polygonal shape and the taper vertically connected to the processing contour surface of each side straight portion. Continuous processing of the parts and the vertical portion is performed by the drive mechanism B.
[0010]
Further, according to the technical means described in claim 2,Movement of the work table on which the workpiece is placed and set in the left and right and front and back directions (X-axis and Y-axis movements) and the vertical movement of the spindle that supports the grinding wheel on a slide member via a high-frequency motor so that the grinding wheel can rotate independently (Z-axis) The movement) is performed by driving the drive mechanism A by the control means A and driving the drive mechanism B by the control means B based on the processing conditions (including the contents) calculated and set by the calculation means A to D. Is performed by the deflection of the grinding wheel axis with respect to the spindle axis (C axis), which always directs in the normal direction to the processing contour surface of the planar polygonal shape, so that the tapered portion and the vertical portion vertically connected to the processing contour surface of the workpiece to be ground. Is performed continuously.
[0011]
Further, according to the technical means of claim 3,Movement of the work table on which the workpiece is placed and set in the left and right and front and back directions (X-axis and Y-axis movements) and the vertical movement of the spindle that supports the grinding wheel on a slide member via a high-frequency motor so that the grinding wheel can rotate independently (Z-axis) Movement) is a driving of the drive mechanism A by the control means A based on the processing conditions (including the contents) calculated and set by the calculation means A to D, and a drive of the drive mechanism B by the control means B to hit the grinding wheel. The surface is always oriented in the direction normal to the ring-shaped machining contour surface, and is executed by the deflection of the grinding wheel axis with respect to the spindle axis (C-axis). And the vertical portion are continuously processed.
[0012]
【Example】
1 and 2 are side views showing the appearance (entire) of a CNC jig grinding machine.And a front view.
The work table 1 is disposed on the gantry so as to be movable in the left-right and front-rear directions, that is, in the X-axis direction and the Y-axis direction. The object to be ground, which is moved in the front-rear direction by the servomotor Y-1 and has a planar polygonal shape set on the upper surface of the work table 14Is transported in the left, right, front and back directions.
Spindle 2,Mounted above work table 1Lifting frame mechanismUp and down,That is, it is movably disposed in the Z-axis direction,A slide member for deflecting the grinding wheel axis at the lower end of the spindle 2 with the spindle axis (C axis) and setting the cutting amount 14 Was providedThe grinding wheel 3 for independently driving and rotating by the high frequency motor 13 supported at the lower end via the automatic cutting device 12 to grind the processing contour surface 5 of the workpiece 4 reciprocates up and down along the processing contour surface 5. It is made to let.Note that the lower peripheral edge of the grinding wheel 3 is chamfered in an arc shape.
[0013]
Figure 3,The drive control device of the present inventionShow an example of implementationIt is a functional block diagram.
In the drawing, reference numeral 6 denotes a processing contour surface 5 of the workpiece 4.Length of each side straight part and circumference of each corner RThe calculating means A and 7 for calculating the length from the design value dimensions are the same as those of the workpiece 4 calculated by the calculating means A6.Each side straight part and the arc of each corner RNumber of machining divisions of machining contour surface 5 based on lengthIndex numberCalculating means B and 8 for calculating the processing distance L1 of the linear portion of each indexed portion and the tapered portion 5a of the processing contour surface 5 of the corner R(Fig. 8 (b), figure 12 (B), Figure 13 (See (b))And the processing distance L2 of the vertical portion 5b connected to the tapered portion 5a.(Fig. 8 (b), figure 12 (B), Figure 13 (See (b))Calculating means C, 9 for calculating from the design value dimensions calculating means D for calculating the synchronized moving distance between the spindle 2 and the work table 1 based on the taper angle θ of the tapered portion 5a.It is.
11 Moves the spindle 2 and the work table 1, which can be positioned based on the moving distance calculated by the calculating means D9, synchronously, and the amount of movement of the spindle 2 is calculated by the calculating means C8. 5a When the processing distance L1 is reached, only the spindle 2 moves down alone and 5b Control means A for controlling to process Ten Is the control means A 11 A drive mechanism A that performs control to synchronize the spindle 2 and the work table 1 based on the 16 Is a driving mechanism A based on the indexing number which is the number of machining divisions calculated by the calculating means B. Ten While following the movement of the work table 1 by the above, the grinding wheel axis is deflected by the spindle shaft (C axis) so that the contact surface of the grinding wheel 3 that changes with the movement is always directed in the normal direction to the processing contour surface 5. Control means B for synchronizing the deflection by the spindle shaft with the movement of the work table 1 by the drive mechanism A; 15 Is the control means B 16 , The spindle of the grinding wheel 3 is deflected in the direction of deflection by the spindle axis (C axis) so that the contact surface of the grinding wheel 3 is always directed in the direction perpendicular to the processing contour surface 5 of the workpiece 4.Drive mechanism B.
That is, the control means A based on the processing conditions (including the contents) set by the calculation means A to D6, 7, 8, 9 11 Drive mechanism A by Ten To move the work table 1 in the left / right and front / rear directions and the spindle 2 in the up / down direction. 16 Drive mechanism B controlled by 15 And a control drive for deflecting the grinding wheel axis in the deflecting direction by the spindle shaft so that the contact surface of the grinding wheel 3 is always oriented in the normal direction to the processing contour surface 5. Taper section connected vertically above and below the processing contour surface 5 5a And vertical 5b And the continuous processing is performed simultaneously.
[0014]
The calculation means A to D6, 7, 8, 9 are stored in a memory connected to a central processing unit (CPU).EnteredThe length of the processing contour surface of the workpiece, the design value of the workpiece in the X direction, the design value of the same in the Y direction, the radius of the corner R, the length of the straight portion of the workpiece, and the length of the corner R. Length, number of machining divisions of those machining contour surfaces, The X-axis movement amount and the Y-axis movement amount of each side linear portion, the X-axis movement amount and the Y-axis movement amount of the corner R, and the Z-axis movement amount of the taper portion and the vertical portion. And processed by middle-layer processing equipmentIt is.
For example, when calculating the length of the processing contour surface 5 of the workpiece 4 having a polygonal shape by the calculating means A6, the length in the X-axis direction or the Y-axis direction, that is, the long side direction L3 or The length of the short side direction L4It can be calculated (calculated) from the design value dimensions stored in the memory.
The calculation isIt is configured to be input to a central processing unit (CPU) and subjected to calculation (operation) processing. The various data described above calculated by these calculating means A to D6, 7, 8, 9 are stored in a RAM connected to a central processing unit (CPU).
[0015]
The control means A11 determines that only the spindle 2 moves downward alone when the downward movement amount of the spindle 2 by the Z-axis servo motor Z-1 reaches the processing distance L1 of the tapered portion 5a calculated by the calculation means C8. And process the vertical part 5b connected to the tapered part 5aDrive mechanism A Control.
That is,While the spindle 2 which can be positioned by the Z-axis servomotor A-3 is moved down based on the moving distance calculated by the calculating means D9, the grinding of the tapered portion 5a performed in synchronization with this movement, and this tapering is completed. The movement of the work table 1 in the left-right or front-rear direction by the X-axis servo motor X-1 or the Y-axis servo motor Y-1 synchronized at the time is stopped, and only the spindle 2 moves downward without stopping the movement and the vertical portion 5b. And when the spindle 1 moves up alone to machine the vertical portion 5b, and does not stop its movement, but again starts machining the tapered portion 5a, the X-axis servomotor X-1 or Y It functions to synchronize the movement of the work table 1 in the left-right or front-back direction by the axis servomotor Y-1 based on the movement distance calculated by the calculation means D9. .
[0016]
The drive mechanism A10 is connected to a central processing unit (CPU) via an appropriate configuration (electrical) device, and includes an X-axis servomotor A-1 for moving the work table 1 in the left-right direction and a Y-axis servo for moving the worktable 1 in the front-rear direction. A motor Y-1 and a Z-axis servo motor Z-1 for moving the spindle 2 in the vertical direction. These servo motors X-1, Y-1 and Z-1 are connected via appropriate components such as a drive circuit. When connected to a central processing unit (CPU) and operated by an output signal (data) from the CPU (CPU), the X-axis servo motor X-1 gives a movement for moving the table 1 in the left-right (horizontal) direction and , The Y-axis servo motor Y-1 is configured to provide a movement for moving the table 1 in the front-rear direction, and the Z-axis servo motor Z-1 is configured to provide a movement for moving the spindle 2 in the vertical direction.
By the way, both X-axis and Y-axis servo motors X-1 and Y-1 are,The Z-axis servo motor Z-1 is connected to the work table 1 on the back surface thereof by a ball screw and a ball nut, and the Z-axis servo motor Z-1 vertically supports the spindle 2 by the ball screw, the ball nut and other connecting members. It is linked to the mechanism.
[0017]
The automatic cutting device 12 moves along the processing contour surface 5 of the workpiece 4.Grinding wheel 3Is performed once, theMachining contour surfaceThe function of automatically changing the cutting amount of the grinding wheel 3 per one time to reach a preset "total cutting amount" is to rotate the ball screw by the U-axis servo motor U-1. The grinding wheel 3 is moved in the cutting direction by a wedge-shaped direction conversion member connected to the ball nut for converting the vertical movement of the ball nut in the horizontal direction, that is, the U-axis direction (the cutting direction of the grinding wheel 3), along the inclined guide surface. It is configured to make it.
That is,Grinding wheel3 can be attached to and detached from the high-frequency motor 13Mounting, grindingA high-frequency motor 13 for driving and rotating the grindstone 3 at a predetermined rotation speed (rpm);Slide member at the lower end of spindle 2 to be supported 14 The grinding wheel 3 is cut by setting the moving amount of the wheel, and the wheel axis is deflected by the spindle axis (C axis).It is configured as follows.
The U-axis servo motor U-1 is connected to a central processing unit (CPU) via appropriate components such as a drive circuit, and operates based on an output signal (data) from the device (CPU). The above movement is given.
[0018]
the aboveThe control means B16 isSlide member 14 C axis servo motor that deflects the grinding wheel axis with the spindle axis (C axis) of spindle 2 C-1 As described above, the deflection that causes the contact surface of the grindstone 3 to always face at right angles to the machining contour surface 5 is determined by the number of machining divisions of the straight portion and the corner R of the machining contour surface 5 calculated by the calculating means B7. When the spindle 2 reaches the corner R from the linear portion by the vertical reciprocating movement of the spindle 2, the drive mechanism A Ten X-axis servo motor X-1 And Y-axis servo motor Y-1 Is controlled to perform a synchronous operation in synchronization with the movement of the work table 1 by. Then, the function of releasing the deflection by the end of the number of machining divisions of the corner R is provided.
[0019]
The drive mechanism B15 is connected to a central processing unit (CPU) via appropriate components (electrical) to control means A11. The drive mechanism B15 controls the work table 1 by an X-axis servomotor X-1 and a Y-axis servomotor Y-1. The horizontal and vertical movements and the vertical movement of the spindle 2 by the Z-axis servomotor Z-1 allow continuous processing of the tapered portion and the vertical portion of the processing contour surface 5, and the grinding wheel 3 is synchronized with this. The grinding wheel axis is deflected by the spindle axis (C axis) so that the contact surface always faces in the normal direction to the processing contour surface 5. It is deflected by the C-axis servo motor C-1 of the spindle 2 and connected to a central processing unit (CPU) via appropriate components such as a drive circuit, and an output signal (data) from the device (CPU). ) To deflect the spindle axis (C axis) so that the deflecting direction of the grindstone 3 is always directed perpendicularly (in the normal direction) to the processing contour surface 5.Play a role.
[0020]
Drive mechanism B in the above embodiment 15 Indicates that the spindle 2 is a C-axis servo motor C-1 The deflection of the spindle shaft (C-axis) so that the contact surface of the grinding wheel shaft 3 always faces in the normal direction to the processing contour surface 5 by the drive mechanism A Ten X-axis servo motor X-1 And Y-axis servo motor Y-1 Means B for synchronizing with movement of work table 1 by 16 It is provided with.
That is, a tapered portion is formed on each side linear portion of the workpiece 4 having a rectangular shape in a plane and a corner having a corner shape. 5a And vertical 5b The X-axis servo motor is used when continuous machining is performed by connecting X-1 Or Y axis servo motor Y-1 Left and right or back and forth direction of work table 1 and Z-axis servo motor synchronized with this Z-1 The vertical reciprocating movement of the spindle 2 by the a And vertical 5b X-axis servo motor synchronized with this X-1 And Y-axis servo motor Y-1 By moving the work table 1 in both the left and right and front and rear directions, the processing contour surface 5 of each straight side straight portion is ground. That is, the control means B does not rotate the planet 16 It is provided with. And automatic cutting device 12 U-axis servo motor U-1 Is performed so that the cutting direction (hit surface) of the grinding wheel 3 is always directed to the normal direction.
[0021]
Therefore, in the case of the grinding object 4 having a ring shape, the grinding wheel 3 is arranged along the processing contour surface 5 of the corner R in which the corner of the circumferential processing contour surface 5 or the polygonal grinding object has an arc shape. Tapered part 5a And vertical 5b X-axis servo motor X-1 And Y-axis servo motor Y-1 Drive mechanism A that moves the work table 1 in the left-right and front-rear directions and the spindle 2 moves in the vertical direction. Ten The spindle axis (C-axis) follows the movement of the work table 1 in the left-right and front-rear directions so that the contact surface of the grinding wheel 3 is always directed in the normal direction to the processing contour surface 5 in synchronization with the deflection. Is to give.
[0022]
Next, the configuration as aboveWas doneAn embodiment of the grinding of the workpiece 4 by the drive control device of the CNC jig grinding machine will be described.I do.
4 to 7 and 9 to 9 11 The figure 14 It has a flat rectangular shape shown inThe tapered portion 5a and the vertical portion 5b vertically connected to the outer processing contour surface 5 of the ring-shaped workpiece 4 are provided with an outwardly tapered portion 5a-1 and an inwardly tapered portion 5a provided on the inner processing contour surface 5-1. -2 (reverse taper section)These flowcharts relate to a RAM that proceeds by executing a control program stored in a ROM of a central processing unit (CPU).
That is, the tapered portion 5a and the vertical portion 5b to each side straight portion and the four corners R of the outer processing contour surface 5 of the workpiece 4 are processed, and the outwardly inclined taper portion 5a to the inner processing contour surface 5-1. -1 and finally machining of the tapered portion 5a-2 with an inward slope to the inner machining contour surface 5-1 by a series of operations.AutomaticallyDone.
[0023]
When the operator turns on the start operation switch of the grinding machine, the lengths L3 and L4 of the straight portions of the long and short sides of the outer processing contour surface 5 of the workpiece 4 by the calculating means A6 and the arc length of the corner R are changed. The number of machining divisions of the straight part and the four corners R based on the lengths L3 and L4 of the straight part and the arc length of the corner R calculated by the calculating means A6.Index numberIs calculated by the calculating means B7.
next,The processing distance L1 between the straight portion and the tapered portion 5a of the corner R and the processing distance L2 of the vertical portion 5b connected to the tapered portion 5a are calculated by the calculating means C8.Vertical part 5b AgainstBased on the taper angle θ of the taper portion 5a, the vertical and horizontal movement distances of the spindle 2 and the work table 1 are calculated by the calculating means D9 and stored in the RAM.
[0024]
When the processing conditions (including the contents) calculated and set by the calculating means A to D6, 7, 8, 9 are stored in the RAM, the processing conditions of the flowchart shown in FIG. In the order of steps, first of all,8The upper program memory in (a) is called (step 20).
[0025]
When the program in the back straight section is called,5As shown in the flow chartThe above index number isA counter for counting the number of reciprocating vertical movements of the spindle 2 is initialized on the basis of (step 31). In this embodiment, the number of machining divisions is determined by one reciprocation of the spindle 2 up and down.Index number of, Is updated once. For example, if the number of machining divisions is 5, the counter is updated by the spindle 2 reciprocating up and down 5 times.
[0026]
When the counter is initialized, the high-frequency motor 13 operates to rotate the grinding wheel 3, and the X-axis servo motor X-1, Y-axis servo motor Y-1, and Z-axis servo motor Z-1 start operating. Work table 1ToLeft / right (X-axis) / front-back (Y-axis)Move this moveThe spindle 2 is moved down (Z-axis) in synchronization with the machining of the taper portion 5a (step 32), the machining of the vertical portion 5b (step 33), and the spindle 2 is moved up.(Z axis) movementThe vertical part 5b is processed (step 34) and the taper part 5a is processed (step 35).Index number ofIt is repeated until the counter is updated by the number of divisions based on (step 36).7reference).
At this point the repetition counter,Number of machining divisionsIndex number ofIt is determined whether or not the distance is smaller (step 37). If it is larger, the left / right (X-axis) movement distance of the table 1 moved this time is calculated (step 38) and the remaining movement distance is calculated (step 39). . It is determined whether there is a remaining moving distance (step 40). If there is a remaining moving distance, the remaining moving distance is divided into two (step 41), and the spindle 2 is moved up and down again in synchronization with the movement of the work table 1. By reciprocating (steps 42 to 45), the processing of the tapered portion 5a and the vertical portion 5b with respect to the processing contour surface 5 of the back straight portion is completed.
[0027]
When the processing of the back side straight section is completed, the left back corner R (Fig.8The upper (left) program memory in (a) is called (step 21).
When the program at the left back corner R is called,6As shown in the flowchart of FIG.Index number ofA counter for counting the number of reciprocating vertical movements of the spindle 2 is initialized on the basis of (step 50).
[0028]
When the counter is initialized, the high frequency motor 13 operates to rotate the grinding wheel 3, and the X-axis servo motor X-1, the Y-axis servo motor Y-1, and the Z-axis servo motor Z-1 start operating. At the same time, the C-axis servomotor C-1 is also started to operate by the control means B16, and is synchronized with the movement of the work table 1 in the left-right (X-axis) and front-back (Y-axis) directions.Let grindingThe contact surface of the grindstone 3 always matches the processing contour surface 5.Normal directionTo faceC-axis servo motor that deflects the grindstone axis with the spindle axis (C-axis) is controlled by control means B. C-1 Done byThe spindle 2 is moved down (Z axis) to process the tapered portion 5a (step 51) and the vertical portion 5b (step 52), and the spindle 2 is moved up to process the vertical portion 5b (step 53). , The number of processing divisions of the above-mentioned corner partIndex numberThe index number and counter are updated based onBe doneRepeat until (Step 55)Done.
At this point, the repetition counter indicates the number of machining divisions.Index numberIt is determined whether or not it is smaller (step 56). If it is larger, the above-mentioned operation is repeated again to complete the machining of the tapered portion 5a and the vertical portion 5b on the machining contour surface 5 at the left rear corner.
[0029]
When the processing of the left rear corner is completed,8The program memory (left side in (a)) is called (step 22).
When the program in the left straight section is called,7As shown in the flowchart,Index numberA counter for counting the number of reciprocating vertical movements of the spindle 2 is initialized on the basis of (step 31).
After the counter is initialized, the number of machining divisions of the left-side linear part is performed in the order of steps 32 to 35 of the back-side linear part described above.The index number based on the index numberAre repeated until the counter is updated (step 36).
That is, processing of the left straight partToIf it is, the repetition counter determines the number of machiningIndex numberIf it is larger, the moving distance before and after (Y axis) of the table 1 moved this time is calculated (step 60). By obtaining step 60, the machining of the tapered portion 5a and the vertical portion 5b on the machining contour surface 5 of the left straight portion is completed.
[0030]
After that,Left front corner R (Figure8(B) lower left program memory (step 23), front straight section (fig.8The program memory (step 24) in the lower part of (a), the right front corner R (fig.8(B) lower right program memory (step 25), right straight section (fig.8The program memory (step 26) on the right side in (b), the right back corner R (see FIG.8Recall the program memory (step 27) in (b) above, and5Or figure7The processing of the taper portion 5a and the vertical portion 5b for each side straight portion and the four corners R is completed by executing the flowcharts shown in FIG.You.
Finally,The program memory of Nigge R is called (step 28), and the X-axis servo motor X-1, the Y-axis servo motor Y-1, the Z-axis servo motor Z-1, and the C-axis servo motor C-1 operate to operate the spindle 2 By moving the work table 1 and the grindstone 3 back to the origin position while moving them back to the origin position (step 29), the processing of the outer machining contour surface 5 of the workpiece 4 is completed. finish.
[0031]
When the machining of the outer machining contour surface 5 of the workpiece 4 is completed, the outward machining of the tapered portion 5a-1 to the inner machining contour surface 5-1 is started and stored in the RAM in advance in the program memory. Figure9In the order of steps in the flowchart shown in,First of all, approach corner R (Fig.13The lower (left) program memory in (b) is calledServed(Step 70), the number of machining divisions of the corner R is divided into two (Step 71). After the corner R is divided into two, the angle of the approach R is designated and the program for the left front corner R is called (step 72).
When the program of the left front corner R is called,11As shown in the flowchart, the counter for counting the number of vertical reciprocating movements of the spindle 2 is initialized based on the number of processing divisions at the corner R (step 90).
[0032]
When the counter is initialized, the high-frequency motor 13 is operated to rotate the grinding wheel 3, and the X-axis servo motor X-1, Y-axis servo motor Y-1, Z-axis servo motor Z-1 and control means B16 The C-axis servomotor C-1 starts to operate, and the contact surface of the grinding wheel 3 is constantly adjusted to the machining contour surface 5-5 in synchronization with the movement of the work table 1 in the left-right (X-axis) and front-rear (Y-axis) directions. For 1Grinding wheel axis with spindle axis (C axis) so that it faces in the normal directionIn addition to deflecting, the spindle 2 is moved down (Z axis) to process the tapered portion 5a-1 (step 91), and the spindle 2 is raised to process the tapered portion 5a-1 (step 92). Number of processing divisionsThe index number based on the index number, Until the counter is updated (step 93).
At this point, the repetition counter indicates the number of machining divisions.Index numberIt is determined whether or not it is smaller (step 94). If it is larger, the above steps 91 to 93 are repeated again to complete the processing of the tapered portion 5a-1 on the processing contour surface 5-1 at the left back corner. Become.
[0033]
When the processing of the left front corner R is completed, the left straight section (Fig.13The program memory (left side in (a)) is called (step 73). When the program of the left straight portion is called, as shown in the flowchart of FIG.Index numberA counter for counting the number of vertical reciprocating movements of the spindle 2 is initialized on the basis of (step 100).
[0034]
When the counter is initialized, the high-frequency motor 13 operates to rotate the grindstone 3, and the X-axis servo motor X-1, Y-axis servo motor Y-1, and Z-axis servo motor Z-1 start operating. The spindle 2 is moved down (Z-axis) in synchronization with the movement of the work table 1 in the left-right (X-axis) and forward-backward (Y-axis) directions to process the tapered portion 5a-1 (step 101), 2 and raise the taper portion 5a (step 102) to the above-mentioned corner portionThe index number based on the index numberUntil the counter is updated (step 103).Tenreference).
At this point, the repetition counter indicates the number of machining divisions.Index numberIt is determined whether or not the distance is smaller (step 104). If it is larger, the moving distance before and after (Y axis) of the table 1 moved this time is calculated (step 105) and the remaining moving distance is calculated (step 106). . It is determined whether there is a remaining moving distance (step 106). If there is a remaining moving distance, the remaining moving distance is divided into two (step 107), and the spindle 2 is moved up and down again in synchronization with the movement of the work table 1. By reciprocating (steps 109 to 110), the machining of the tapered portion 5a-1 on the machining contour surface 5-1 of the left straight portion is completed.
[0035]
After that,Left back corner R (Figure13(A) (upper left) Program memory (step 74), back straight section (fig.13The program memory (step 75) in the upper part of (a), the right rear corner R (see FIG.13In (a), the upper right memory (step 76) and the left straight section (fig.13(Left side in (b)), program memory (step 77), right front corner R (fig.14(B) lower right program memory (step 78), front straight section (fig.14The program memory (lower side in (a)) (step 79) and the number of machining divisions of the corner R are divided into two (step 80).
After the corner R is divided into two parts, the angle of the approach R is designated and the program memory (step 81) of the left front corner R is called, andTenOr figure11The processing of the taper portion 5a-1 for each side straight line portion and the four corners R is completed by executing the flowcharts shown in FIG.Spindle shaft (C axis)(Step 83), and the X-axis servo motor X-1, Y-axis servo motor Y-1, Z-axis servo motor Z-1 and C-axis servo motor C-1 operate to move the spindle 2 to the home position. By moving the work table 1 and the grindstone 3 back to the origin position (step 85) together with the movement back (step 84), the outward inclination of the inner processing contour surface 5-1 of the workpiece 4 is reduced. The processing of the tapered portion 5a-1 is completed.
[0036]
When the machining of the outwardly inclined tapered portion 5a-1 of the inner machining contour surface 5-1 of the workpiece 4 is completed, the machining of the inwardly inclined taper portion 5a-2 to the inner machining contour surface 5-1 is started. Figure as described above9Steps 73 to 81 in the flowchart shown in the orderTenOr figure11Are called, and the machining of the inwardly inclined tapered portion 5a-2 with respect to each side straight portion and the four corners R is completed (FIG.13 And figure 14reference).
[0037]
Thus, according to the drive control device for the CNC jig grinding machine of the present invention, three-dimensional control (simultaneous control) of the X axis and the Y axis for moving the work table 1 left and right and back and forth, and the Z axis for moving the spindle 2 up and down. Three-axis control)In each side linear portion of the workpiece 4 having a substantially rectangular shape in plan viewThe vertically tapered portion 5a and the vertical portion 5b can be simultaneously and continuously processed. Moreover, in addition to the simultaneous three-axis control of the X-axis, Y-axis, and Z-axis, the grinding wheel 3 changes with the movement while following the left-right and front-to-back movement of the work table 1.The grinding wheel axis is deflected by the spindle axis (C axis) so that the contact surface is always oriented in the direction of the spring with respect to the processing contour surface 5 of the workpiece 4.Four-dimensional control (simultaneous four-axis control) that simultaneously controls the C axis becomes possible,Thereby, the tapered portion which continues vertically at the four corners R of the workpiece 4 is also provided. 5a And vertical 5b Can be continuously processed at the same time. FurthermoreConical, outward taper, inward taper(Reverse taper), Bottom surface, corner R surface, etc. can be simultaneously processed at the same time.
[0038]
【The invention's effect】
Since the drive control device of the CNC shaft grinding machine of the present invention is configured as described above, the following effects are obtained.
In addition to three-dimensional control (simultaneous three-axis control) of the X-axis and Y-axis for moving the work table left and right and back and forth and the Z-axis for moving the spindle up and down (simultaneous three-axis control), the work table 1 is also moved to the left and right and back and forth. The grinding wheel that changes as it movesDeflection of the grinding wheel axis with the spindle axis so that the contact surface always faces in the normal direction to the processing contour surface of the workpieceSince four-dimensional control (simultaneous four-axis control) that can simultaneously control the C axis is possible,A tapered section that extends vertically while a grinding wheel that is independently driven and rotated by a high-frequency motor follows the straight line and the corner R of each side of the processing contour surface of the workpiece that has a planar polygonal shape and the corner is an arc. And the vertical portion can be continuously processed simultaneously.
Also, not only the outer processing contour surface of the ring-shaped workpiece but also the inner processing contour surface can be simultaneously and continuously processed with the tapered portion and the vertical portion which are connected vertically, and further, the conical, vertical, outward taper, The inward taper (reverse taper), the bottom surface, the corner R surface, etc. can be continuously processed. By being able to continuously process vertical parts at the same time,Dramatic reduction of machining time and unmanned operation are possible, and at the same time with high accuracyContinuous taper, vertical, etc.It can be ground.
[Brief description of the drawings]
FIG. 1 is a side view showing the appearance (entire) of a CNC jig grinding machine.
FIG. 2 is a front view of the same.
FIG. 3 shows the drive control device of the CNC jig grinding machine of the present invention.Show an example of implementationFunctional block diagram
FIG. 4An operation flowchart for machining a tapered portion and a vertical portion on an outer machining contour surface showing an embodiment of a drive control device for a CNC jig grinding machine of the present invention.
FIG. 5Operation flowchart for processing a tapered part and a vertical part on a straight part in the X-axis direction of the outer processing contour surface
FIG. 6Operation flowchart for machining a tapered portion and a vertical portion at a corner R of the same outer machining contour surface
FIG. 7Operation flowchart for processing a tapered part and a vertical part on a straight part in the Y-axis direction of the outer processing contour surface
FIG. 8FIG. 4 is a schematic view of a workpiece to be ground, showing a processing state according to the flowchart, (a) is a plan view, and (b) is a front view showing a part thereof.
FIG. 9Operation flowchart for machining a tapered part on the inside machining contour surface
FIG. 10Operation flowchart for processing a tapered part on the straight part of the same inner processing contour surface
FIG. 11Operation flowchart for processing a tapered portion at the corner R of the same inner processing contour surface
FIG.FIG. 3 is a schematic view of a workpiece to be ground showing a processing state of an outwardly inclined tapered portion according to the flowchart, (a) is a plan view, and (b) is a front view showing a part thereof.
FIG. 13FIG. 3 is a schematic view of a workpiece to be ground showing a processing state of an inwardly tapered portion (reversely tapered portion) according to the flowchart;
FIG. 14Grindable processed by one embodiment of the drive control device of the CNC jig grinding machine of the present invention (A) is a plan view, (b) is a longitudinal sectional view
[Explanation of symbols]
1. Work table 2. Spindle
3 ... Whetstone 4 ... Object to be ground
5 Processing contour surface 6 Calculation means A
7 Calculation means B 8 Calculation means C
9 Calculation means D 10 Drive mechanism A
11 ... Control means A12 … Automatic cutting device
13 ... High frequency motor 14 ... Slide members
15 Drive mechanism B 16 Control means B

Claims

The work table is moved on the work contour surface of a workpiece having a planar polygonal shape placed and set on a work table that moves left and right and back and forth (moves in the X-axis and Y-axis) and has a rounded corner. A vertical movement (Z-axis movement) of the grinding wheel by the vertical movement of the spindle; and a slide member at the lower end of the spindle for deflecting the grinding wheel axis by the spindle axis (C axis) and setting a cutting amount. The automatic cutting device is moved (U-axis movement), and the high-frequency motor supported via the slide member drives and rotates the grindstone, which is independently driven, while simultaneously processing the tapered portion and the vertical portion connected vertically one after the other. CNC jig grinding machine,
Calculating means A for calculating the length of each side straight portion and the arc length of each corner R of the machining contour surface of the workpiece from the design value dimensions, and the straight side portion of each side of the workpiece calculated by the calculating means A Calculating means B for calculating the indexing number, which is the number of machining divisions of the straight line portion and the corner R, based on the length of the arc and the arc length of each corner R, the taper of the straight line portion of each indexed portion and the corner R Means for calculating the machining distance of the vertical portion and the machining distance of the vertical portion connected to the tapered portion from the design value dimensions, and the spindle and the work table based on the taper angle of the linear portion and the tapered portion of the corner R with respect to the vertical portion. Calculating means D for calculating a moving distance synchronized with the spindle, based on the moving distance calculated by the calculating means D, synchronously moving the worktable spindle and the work table; At the time when the amount of movement reaches the processing distance of the tapered portion calculated by the calculating means C, the control means A controls only the spindle to move alone to process the vertical part, based on the control means A, A drive mechanism A for synchronously moving and positioning the spindle and the work table, and a movement of the work table by the drive mechanism A based on the indexing number, which is the number of processing divisions of each side linear portion and the corner R calculated by the calculating means B. The grinding wheel is deflected in the deflection direction by the spindle so that the contact surface of the grinding wheel, which changes with the movement while moving, is always directed in the normal direction to the processing contour surface of each side straight portion and the corner R. A control means B for synchronizing the deflection by the shaft with the movement of the work table by the drive mechanism A. Based on the control means B, the contact surface of the grinding wheel is always covered. Deflect the wheel spindle in the spindle axis so as to direct normal to the machined contour surface of the cutting material, CNC jig grinder drive control apparatus characterized by comprising a grinding drive mechanism B.

The work table moves on the work contour surface of a workpiece having a rectangular shape in a plane, which is set and placed on a work table that moves left and right and back and forth (moves in the X-axis and Y-axis) and has corners with corners. A vertical movement (Z-axis movement) of the grinding wheel by vertical movement of the spindle, and a slide member for deflecting the grinding wheel axis by a spindle axis (C axis) at the lower end of the spindle and setting a cutting amount. By the movement of the automatic cutting device (U-axis movement), the high-frequency motor supported via a slide member drives and rotates the grindstone that rotates independently, and simultaneously successively processes the tapered part and the vertical part connected vertically. CNC jig grinding machine,
Calculation means A for calculating the length of each side straight line portion of the processing contour surface of the workpiece from the design value dimensions, based on the length of each side straight line portion of the workpiece calculated by the calculation means A Calculating means B for calculating an indexing number which is the number of divisions; calculating means C for calculating a machining distance of a tapered portion of each indexed portion and a machining distance of a vertical portion connected to the tapered portion from a design value dimension; A calculating means D for calculating a synchronous moving distance between the spindle and the working table based on the taper angle of the tapered portion with respect to the vertical part, and the spindle and the working table which can be positioned based on the moving distance calculated by the calculating means D; When the amount of movement of the spindle reaches the machining distance of the tapered portion calculated by the calculating means C, only the spindle alone moves to add the vertical portion. A driving mechanism A for synchronously positioning the spindle and the work table based on the control means A, and a dividing number, which is the number of processing divisions of each side straight portion calculated by the calculating means B. Following the movement of the work table by the drive mechanism A based on the number of outputs, the grinding wheel axis is deflected by the spindle axis so that the contact surface of the grinding wheel always faces in the normal direction to the processing contour surface of each side straight portion. A control means B for synchronizing the deflection by the spindle shaft with the movement of the work table by the drive mechanism A, based on the control means B, the contact surface of the grinding wheel is always in the normal direction to the processing contour surface of the workpiece. A drive control device for a CNC jig grinding machine, comprising: a drive mechanism B for performing deflection toward the surface by deflection of a grindstone axis by a spindle axis to perform grinding .

Movement of the work table and grinding by moving the spindle up and down on the processing contour surface of the object to be ground presenting a flat ring placed and set on a work table moving left and right and back and forth (moving in the X and Y axes). Up and down movement of the grinding wheel (Z axis movement), and movement of the automatic cutting device equipped with a slide member for setting the cutting amount while deflecting the grinding wheel axis at the lower end of the spindle with the spindle shaft (C axis) (U axis Moving), a high-frequency motor supported via a slide member to independently drive and rotate a grinding wheel, and simultaneously perform continuous machining of a tapered portion and a vertical portion connected vertically in a CNC jig grinding machine. ,
Calculating means A for calculating the ring circumferential length of each side straight portion of the processing contour surface of the workpiece from the design value dimensions, based on the ring circumferential length of the workpiece calculated by the calculating means A, Calculating means B for calculating the indexing number which is the number of machining divisions, calculating means C for calculating the machining distance of the tapered portion of each indexed portion and the machining distance of the vertical portion connected to the tapered portion from the design value dimensions. Calculating means D for calculating a synchronous moving distance between the spindle and the working table based on the taper angle of the tapered portion with respect to the vertical part, and the spindle and the working table which can be positioned based on the moving distance calculated by the calculating means D Are synchronized with each other, and when the movement amount of the spindle reaches the machining distance of the tapered portion calculated by the calculation means C, only the spindle alone moves and hangs. Control means A for controlling the processing of the part, a driving mechanism A for synchronously positioning the spindle and the work table based on the control means A, and processing division of the ring circumference calculated by the calculation means B While following the movement of the work table by the drive mechanism A based on the index number, which is the number of times, the contact surface of the grinding wheel that changes with the movement is always directed in the normal direction to the processing contour surface of the ring circumference. Control means B for deflecting the grinding wheel axis in the direction of deflection by the spindle axis, and synchronizing the deflection by the spindle axis with the movement of the work table by the drive mechanism A. Based on this control means B, the contact surface of the grinding wheel is always deflect the wheel spindle in the spindle axis so as to direct normal to the circumference of the machining contoured surface, characterized by comprising a grinding drive mechanism B CN Jig grinder drive controller.