JPH0677895B2 - Method for detecting drill cutting loss in printed circuit board drilling machine - Google Patents
Method for detecting drill cutting loss in printed circuit board drilling machineInfo
- Publication number
- JPH0677895B2 JPH0677895B2 JP61116248A JP11624886A JPH0677895B2 JP H0677895 B2 JPH0677895 B2 JP H0677895B2 JP 61116248 A JP61116248 A JP 61116248A JP 11624886 A JP11624886 A JP 11624886A JP H0677895 B2 JPH0677895 B2 JP H0677895B2
- Authority
- JP
- Japan
- Prior art keywords
- printed circuit
- circuit board
- signal
- sensor
- drill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
- B23Q17/0971—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring mechanical vibrations of parts of the machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/12—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring vibration
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明はプリント基板の孔明け加工時に生ずるドリル
の折損を確実に捉えることができるようにした検出方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection method capable of reliably catching a breakage of a drill that occurs when punching a printed circuit board.
（従来の技術） 各種の電子機器に用いられるプリント基板では、スルホ
ールの下孔は数が多いばかりでなく、高密度実装化のた
めその直径がき極めて細く（通常0.3〜0.5mm）なってき
ている。しかも多層プリント基板が使用される傾向にあ
るので、孔明け途中でドリルの折損のおそれが増大して
いる。(Prior Art) In printed circuit boards used in various electronic devices, not only the number of through holes of through holes are large, but also the diameter is extremely thin (usually 0.3 to 0.5 mm) for high density mounting. . Moreover, since a multilayer printed circuit board tends to be used, the risk of breakage of the drill during drilling is increasing.
かかるプリント基板孔明け加工機械のドリル折損の検出
方法として、切粉の排出状態を光学的に監視して検出
する方法、実開昭61−1311号、特開昭60−172409号公
報等に開示するプリント基板に銅箔を貼り付けてその銅
箔間の導通検査をする方法が提案されている。最近で
は、プリント基板孔明け加工機械以外の一般のドリル等
の工具破損検出方法として、特開昭59−175940号公報等
に開示する、AE（アコースティックエミッション）セン
サを用いて検出する方法が提案されている。As a method of detecting a drill breakage in such a printed board punching machine, a method of optically monitoring and detecting the discharge state of chips, disclosed in Japanese Utility Model Laid-Open No. 61-1311 and Japanese Patent Laid-Open No. 60-172409. A method has been proposed in which a copper foil is attached to a printed circuit board to be tested and a continuity test between the copper foils is performed. Recently, as a tool damage detection method for general drills other than the printed circuit board drilling machine, a method for detecting using an AE (Acoustic Emission) sensor disclosed in JP-A-59-175940 is proposed. ing.
（発明が解決しようとする問題点） しかし、上記の切粉の排出状態を光学的に検出する方法
では、切粉がドリルに付着して回転したり、あるいは飛
散するために信頼性のある検出が困難である。また、上
記のプリント基板に銅箔を張り付けて導通検査をする場
合には、導通をみるために電極の取り付けをする必要が
あるので煩雑である。(Problems to be solved by the invention) However, in the above-described method of optically detecting the discharge state of the chips, the chips are attached to the drill to rotate or scatter, so that reliable detection is possible. Is difficult. In addition, when a copper foil is attached to the above-mentioned printed circuit board and a continuity test is performed, it is necessary to attach electrodes in order to check the continuity, which is complicated.
上記のAEセンサを用いた場合には、AE波を直接検出する
ために確実性の高い手段であるが、次の２つの条件を満
す必要がある。即ち、それらは工具折損時のAE信号
（Ｓ）と正常切削時あるいはスピンドル回転の入切また
はテーブルの移動などにより生ずるAE信号（Ｎ）とのSN
比を高くすること、AE信号の減衰を極力防ぐことであ
る。このため、AEセンサを用いる場合にはテーブルやク
ランプ部、スピンドルヘッドなどAE波が伝播し易いと考
えられる部位に一々AEセンサを取付けAE波が伝播してい
るか否かSN比が良いか確かめる必要があった。場合によ
ってはどのような部位にAEセンサを取りつけしても全く
検出不可能であることもあった。特に工具の直径が3mm
以上でないと工具切損AE波の検出は不可能であった。特
にプリント基板の孔明け加工機械のドリル破損を検出す
る場合は、AE信号が減衰し易くAEセンサをどこに取り付
けても検出が困難であった。When the above AE sensor is used, it is a highly reliable means for directly detecting the AE wave, but it is necessary to satisfy the following two conditions. That is, they are the SN of the AE signal (S) when the tool breaks and the AE signal (N) generated during normal cutting, turning the spindle rotation on or off, or moving the table.
It is to raise the ratio and to prevent the attenuation of the AE signal as much as possible. For this reason, when using the AE sensor, it is necessary to attach one AE sensor to each part where AE waves are likely to propagate, such as the table, clamp, spindle head, etc., and check whether the AE waves are transmitting and whether the SN ratio is good. was there. In some cases, no matter what part the AE sensor was attached to, it could not be detected at all. Especially the diameter of the tool is 3mm
Otherwise, it would be impossible to detect the AE wave of tool cutting. In particular, when detecting a drill breakage on a printed circuit board drilling machine, it was difficult to detect the AE signal regardless of where the AE sensor was attached.
（問題を解決するための手段） 本発明は、上述の問題点を解決すべくなされたものであ
って、AEセンサとプリント基板上に載置する押え部材と
連結し、プリント基板の孔明け加工中に発するAE波を押
え部材から捉え、捉えられたAE信号を信号処理回路に入
力し、ドリ折損検出信号を出力させるプリント基板孔明
け加工機械のドリル折損検出方法としたものである。(Means for Solving the Problem) The present invention has been made to solve the above-mentioned problems, and is to perform drilling of a printed circuit board by connecting the AE sensor and a holding member mounted on the printed circuit board. This is a method for detecting a drill breakage in a printed circuit board drilling machine that captures the AE wave emitted inside from the pressing member, inputs the captured AE signal to a signal processing circuit, and outputs a drill breakage detection signal.
（作 用） 孔明け加工中にドリルが折損すると、ドリル折損により
生じたAE波は折損部位からプリント基板１、押え部材
３、AEセンサ７と伝わっていく。本発明ではプリント基
板孔明け加工機械の押え部材からAE信号を捉えるように
することによって、従来プリント基板孔明け加工におい
てAEセンサをどこに取り付けても検出が困難であったAE
信号を捉えてドリルの折損を検出することに成功した。(Operation) If the drill breaks during drilling, the AE waves generated by the drill break are transmitted from the broken part to the printed circuit board 1, holding member 3, and AE sensor 7. In the present invention, by detecting the AE signal from the pressing member of the printed circuit board punching machine, it was difficult to detect the AE sensor wherever the AE sensor was attached in the conventional printed circuit board punching process.
We succeeded in catching the signal and detecting breakage of the drill.
（実施例） 以下、図面により実施例を説明する。第１図は本発明に
用いられた一実施例装置の概略を示すものであって、被
加工材であるプリント基板１は、孔明け機械のテーブル
11に基準ピン2,2によって水平面方向に位置決めされ、
かつ載置したリング状の押え部材３に押えられて、図上
において上下方向の振れを規制する。押え部材３は周知
のように、プリント基板１のドリル孔明け部分を押さえ
るためのものである。なお押え部材３とスピンドルカバ
ー12の間にはスプリング13を介装して押え部材３の押圧
力を一層大ならしめる。この状態でドリル５を装着した
スピンドル４に図示しない駆動源から回転が伝えられ、
下方に送りがかけられてプリント基板１の孔明け加工が
なされる。(Example) Hereinafter, an example will be described with reference to the drawings. FIG. 1 shows an outline of an apparatus according to an embodiment used in the present invention, in which a printed board 1 as a work material is a table of a punching machine.
11 is positioned in the horizontal plane by the reference pins 2 and 2,
Further, it is pressed by the ring-shaped pressing member 3 that is placed, and regulates the vertical shake in the drawing. As is well known, the pressing member 3 is for pressing the drilled portion of the printed circuit board 1. A spring 13 is interposed between the pressing member 3 and the spindle cover 12 to further increase the pressing force of the pressing member 3. In this state, the rotation is transmitted to the spindle 4 equipped with the drill 5 from a drive source (not shown),
The printed board 1 is fed downward and the printed board 1 is perforated.
AEセンサ７と押え部材３とを連結するとき、第１図のよ
うに、AEセンサ７をホルダ８を介して固定部材６に取付
け、固定部材６と押え部材３とを、例えばビニールホー
ス等の可撓性のある導体９で連結し、AE波を押え部材３
から取り出すようにしてもよい。この固定部材６はスピ
ンドル回転やXY移動時に生ずるAE波を検出を防ぐために
例えば上下から図示しないスプリングなどで保持して孔
明け機械と切り離した状態に保持する。When connecting the AE sensor 7 and the pressing member 3, the AE sensor 7 is attached to the fixing member 6 via the holder 8 as shown in FIG. 1, and the fixing member 6 and the pressing member 3 are connected to each other, for example, with a vinyl hose. A flexible conductor 9 is connected to suppress the AE wave.
You may take out from. In order to prevent detection of AE waves generated during spindle rotation and XY movement, this fixing member 6 is held by, for example, a spring (not shown) from above and below and kept in a state of being separated from the punching machine.
可撓性導体９は電気信号を伝えるのではなくAE波の伝達
媒体として使用されるものであり、絶縁電線や、ビニー
ルホース等の内部に液体を封入したものである。The flexible conductor 9 is used not as an electric signal transmission medium but as an AE wave transmission medium, and is a liquid sealed inside an insulated wire or a vinyl hose.
第２図に示すものは、本発明における信号伝達経路を示
している。即ち、AEセンサ７で検知されたAE信号は信号
処理回路10を構成する前置増幅器10aで増幅され、バン
ドパスフィルタ回路10bにより機械的振動などの雑音を
除外し、適切な演算回路10cを用いてドリル折損信号を
抽出する。この信号と予め設定された基準地10dとを比
較回路10eで比較し、折損信号が基準値を超える場合に
は出力回路10fに出力指示を行い、ドリルの切損発生を
発見する。信号処理回路10はその他第３図に示すような
構成としてもよい。この場合AEセンサ７で検知された信
号は、信号処理回路10を構成する前置増幅器10gで増幅
され、ADコンバータ10hでアナログ時間信号をデジタル
時間信号に変換する。このデータをマイクロプロセッサ
10iが数値データ列とみなしてメモリ10jにとりこみ、時
間的変化や周波数の分析などのプログラムを実行し、AE
信号の特徴量を数値化する。スイッチあるいはメモリ内
に準備されたデータ値などの基準値10kと比較して折損
信号が基準値を超える場合には出力回路10mに出力指示
を行い、ドリルの折損発生を発見する。The one shown in FIG. 2 shows a signal transmission path in the present invention. That is, the AE signal detected by the AE sensor 7 is amplified by the preamplifier 10a that constitutes the signal processing circuit 10, the noise such as mechanical vibration is excluded by the bandpass filter circuit 10b, and an appropriate arithmetic circuit 10c is used. To extract the drill breakage signal. The comparison circuit 10e compares this signal with a preset reference point 10d. When the breakage signal exceeds the reference value, the output circuit 10f is instructed to output and the occurrence of cutting loss of the drill is found. The signal processing circuit 10 may have other configurations as shown in FIG. In this case, the signal detected by the AE sensor 7 is amplified by the preamplifier 10g forming the signal processing circuit 10, and the AD converter 10h converts the analog time signal into a digital time signal. This data is a microprocessor
10i regards it as a numerical data string and loads it into memory 10j, and executes programs such as time change and frequency analysis.
Quantify the feature quantity of the signal. When a breakage signal exceeds a reference value 10k such as a data value prepared in a switch or a memory and the breakage signal exceeds the reference value, an output instruction is given to the output circuit 10m to detect occurrence of breakage of the drill.
ドリルの折損を検出すると、ドリル破損信号がでる。こ
の信号をドリル孔明け機械の制御装置に接続することに
よって、孔明け作業を中断させ、その破損したドリルを
予備のドリルと交換し、中断箇所から作業を自動的に再
開させることができる。When the breakage of the drill is detected, a drill breakage signal is given. By connecting this signal to the control unit of the drilling machine, the drilling operation can be interrupted, the damaged drill can be replaced with a spare drill, and the operation can be automatically restarted from the interrupted point.
（効果） 本発明は上述のようにプリント基板の押え部材からAE信
号を捉えるようにし、従来プリント基板孔明け加工にお
いてAEセンサをどこに取り付けても検出が困難であった
AE信号を押え部材で捉えてドリルを折損を検出すること
に成功した。好ましくは、押え部材と孔明け機械と切り
離した状態に保持された固定部材に取付けたAEセンサと
を可撓性導体で連結してAE信号を取り出すようにする
と、従来AEセンサの取付けが困難であった部位の信号も
捉えられるようになり、AEセンサの適用範囲を拡大する
ことができる。さらにプリント基板孔明け加工機械に容
易にAEセンサを取付けできるので、何等特別の段取作業
を要しない。(Effect) In the present invention, the AE signal is captured from the pressing member of the printed circuit board as described above, and it has been difficult to detect the AE sensor wherever the conventional printed circuit board is drilled, regardless of where it is attached.
We succeeded in detecting breakage of the drill by capturing the AE signal with the holding member. Preferably, if the pressing member and the AE sensor attached to the fixed member held in a separated state from the punching machine are connected by a flexible conductor to extract the AE signal, it is difficult to attach the conventional AE sensor. The signal of the existing part can be captured, and the application range of the AE sensor can be expanded. Furthermore, since the AE sensor can be easily attached to the machine for punching printed circuit boards, no special setup work is required.
第１図は本発明を用いた一実施例装置の概略図、第２図
及び第３図は信号処理回路の実施例を示すブロック図で
ある。 １……プリント基板、３……押え部材 ５……ドリル、６……固定部材 ７……AEセンサ、10……信号処理回路FIG. 1 is a schematic diagram of an embodiment of the device using the present invention, and FIGS. 2 and 3 are block diagrams showing an embodiment of a signal processing circuit. 1 ... Printed circuit board, 3 ... Pressing member 5 ... Drill, 6 ... Fixing member 7 ... AE sensor, 10 ... Signal processing circuit
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−242906（ＪＰ，Ａ) 特開 昭60−34252（ＪＰ，Ａ) 特開 昭62−61447（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 60-242906 (JP, A) JP 60-34252 (JP, A) JP 62-61447 (JP, A)
Claims (2)
センサとプリント基板上に載置する押え部材と連結し、
プリント基板の孔明け加工中に発するAE波を押え部材か
ら捉え、捉えられたAE信号を信号処理回路に入力し、ド
リル折損検出信号を出力させるプリント基板孔明け加工
機械のドリル折損検出方法。1. A AE for a printed circuit board punching machine.
Connect the sensor and the pressing member placed on the printed circuit board,
A drill breakage detection method for a printed board drilling machine that captures AE waves generated during punching of a printed circuit board from a holding member, inputs the captured AE signal to a signal processing circuit, and outputs a drill breakage detection signal.
を孔明け機械と振動的に切離した状態で保持し、絶縁電
線や、ビニールホース内に液体を封入した可撓性のある
導体を含む可撓性導体を介して、AEセンサと前記押え部
材と連結した特許請求の範囲第１項記載のプリント基板
孔明け加工機械のドリル折損検出方法。2. The AE sensor is attached to a fixing member, and the fixing member is held in a state in which the fixing member is separated from the punching machine in a vibrating manner, and includes an insulated wire and a flexible conductor in which a liquid is enclosed in a vinyl hose. The drill breakage detection method for a printed circuit board punching machine according to claim 1, wherein the AE sensor and the pressing member are connected via a flexible conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61116248A JPH0677895B2 (en) | 1986-05-22 | 1986-05-22 | Method for detecting drill cutting loss in printed circuit board drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61116248A JPH0677895B2 (en) | 1986-05-22 | 1986-05-22 | Method for detecting drill cutting loss in printed circuit board drilling machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62277246A JPS62277246A (en) | 1987-12-02 |
| JPH0677895B2 true JPH0677895B2 (en) | 1994-10-05 |
Family
ID=14682435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61116248A Expired - Lifetime JPH0677895B2 (en) | 1986-05-22 | 1986-05-22 | Method for detecting drill cutting loss in printed circuit board drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0677895B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112025405B (en) * | 2020-09-07 | 2021-07-02 | 广州驰创科技有限公司 | Pressure sensor for detecting numerical control machine tool |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59175940A (en) * | 1983-03-22 | 1984-10-05 | Nachi Fujikoshi Corp | Abnormality detection for tool |
| JPS6034252A (en) * | 1983-08-05 | 1985-02-21 | Osaka Kiko Co Ltd | Method of automatically detecting tool damage in machine tool |
| JPS6116027U (en) * | 1984-07-05 | 1986-01-30 | 株式会社 三宏堂 | Flexible band stopper for tags |
| JPS6161112U (en) * | 1984-09-26 | 1986-04-24 | ||
| JPS6280555A (en) * | 1985-10-03 | 1987-04-14 | Omron Tateisi Electronics Co | Fitting plate for ae sensor |
| JPH0410992U (en) * | 1990-05-16 | 1992-01-29 | ||
| JP2899485B2 (en) * | 1992-08-25 | 1999-06-02 | シャープ株式会社 | Cordless telephone |
-
1986
- 1986-05-22 JP JP61116248A patent/JPH0677895B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62277246A (en) | 1987-12-02 |
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