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JP4117082B2 - Cross hole deburring method and apparatus - Google Patents
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JP4117082B2 - Cross hole deburring method and apparatus - Google Patents

Cross hole deburring method and apparatus Download PDF

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Publication number
JP4117082B2
JP4117082B2 JP06018299A JP6018299A JP4117082B2 JP 4117082 B2 JP4117082 B2 JP 4117082B2 JP 06018299 A JP06018299 A JP 06018299A JP 6018299 A JP6018299 A JP 6018299A JP 4117082 B2 JP4117082 B2 JP 4117082B2
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JP
Japan
Prior art keywords
hole
pin
deburring tool
opening
tip
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Expired - Fee Related
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JP06018299A
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Japanese (ja)
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JP2000254846A (en
Inventor
誠治 土田
修 丹羽
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JTEKT Corp
Okamura Corp
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JTEKT Corp
Okamura Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、ワークに明けられた穴の開口部に発生しているバリをバリ取り工具によって除去する、交差穴のバリ除去方法及びその装置に関するものである。
【0002】
【従来の技術】
例えば、図9に示す自動車用エンジンに取り付けられるバランスシャフト50は鋼材からなり、エンジンのシリンダブロックに装着されるもので、バランスシャフト50の軸方向数箇所に設けられた円筒部42が軸受ブッシュ43を介してシリンダブロックに軸承され、エンジン稼動中、高速回転する。このバランスシャフト50には、円筒部42の外周面と軸受ブッシュ43との間に潤滑油を供給するための内部通路が形成されている。
【0003】
前記内部通路は、バランスシャフト50を軸方向に貫通する第1の穴40と、円筒部42にて前記第1の穴40と直交して第1の穴40に開口する第2の穴41とから形成されている。この内部通路の加工は、長軸ドリルで第1の穴40を穿設した後、この第1の穴40と直交する方向にドリルを切り込ませて第2の穴41を穿設する。
【0004】
【発明が解決しようとする課題】
前記第2の穴41を穿設したときに図10で示すように、第1の穴40と第2の穴41の交差部においてドリルの切り込み出口となる第2の穴41の開口部41aにバリ44a,44bが発生する。このバリ44a,44bを除去するために、ドリル、ワイヤブラシ等のバリ取り工具45を図10の矢印A方向から図11で示すように第1の穴40に回転挿入している。
【0005】
しかし、バリ取り工具45の挿入方向奥側のバリ44aはバリ取り工具45に押されて逃げるものの、第1の穴40内面側に逃げるためバリ取り工具45による除去可能な位置であり、これは除去することができるが、バリ取り工具45の挿入方向手前側のバリ44bは、バリ取り工具45に押されて図11で示すように、完全に除去できないまま第2の穴41の開口部41a内に倒れ込んでしまいバリの一部が残ることがあった。このバリが残ると前記エンジンのバランスシャフト50においては、エンジン稼動中にバリが脱落し、潤滑油とともに流れて円筒部42と軸受ブッシュ43のと間に噛み込まれ、バランスシャフト50の円滑な回転性を損なうことになりかねない。
【0006】
本発明の目的は、バリの倒れを阻止し完全なバリ取り加工を可能にした交差穴のバリ除去方法及びその装置を提供することである。
【0007】
【課題を解決するための手段】
上記の目的を達成するための本発明の方法は、請求項1に記載の通り、第1の穴の内面に第2の穴が開口部を有するように交差する交差穴の穴明け加工後、前記第1の穴内にバリ取り工具を挿入して前記第2の穴の開口部に発生しているバリを除去する交差穴のバリ除去方法において、前記第1の穴内にバリ取り工具を挿入するに際して、前記第2の穴と略同径のピンをワーク外部から第2の穴にピン先端が第1の穴内に突出する位置まで挿入することにより、前記第2の穴の開口部を閉塞して前記バリ取り工具を前記第1の穴内に挿入し、この第1の穴内に挿入したバリ取り工具との接触によって前記ピン先端が第1の穴内面と略一致する位置まで後退するように前記ピンを保持するようにしたことを特徴とするものである。
【0008】
上記の目的を達成するための本発明の装置は、請求項2に記載の通り、第1の穴の内面に第2の穴が開口部を有するように交差形成された交差穴の前記開口部に発生しているバリを前記第1の穴にバリ取り工具を挿入して除去する交差穴のバリ除去装置において、
前記第2の穴と略同径のピンが一側から突出しているガイドピン機構と、前記ピンがワーク外部から第2の穴に挿入されてピンの先端が第1の穴内に突出する位置まで前記ガイドピン機構を移動させる駆動機構とを備え、前記ピンが第1の穴内に挿入したバリ取り工具との接触によってピン先端が第1の穴の内面と略一致する位置まで前記ガイドピン機構内で後退するようにガイドピン機構に保持されていることを特徴とするものである。
【0009】
【発明の実施の形態】
以下本発明の実施形態を図面に基づいて説明する。本発明の方法は図1及び図2で示すように、従来と同様にワークWに長軸ドリルで第1の穴40を穿設し、この第1の穴40と直交する方向にドリルを切り込ませて第2の穴41を穿設して第1の穴40の内面に第2の穴41が開口部41aを有するように交差する交差穴の穴明け加工後、前記第2の穴41の開口部41aに発生しているバリ44を除去するため、前記第1の穴40内にバリ取り工具45を挿入するに際して、前記第2の穴41と略同径のピン1をワークW外部から第2の穴41に挿入し、前記第2の穴41の開口部41aを前記ピン1で閉塞して前記バリ取り工具45の挿入により前記バリ44が第2の穴41内へ倒れ(逃げ)ることをを防止するようにした。
【0010】
また、前記ピン1を、ピン1の先端が第1の穴40内に突出する位置まで挿入すると共に、第1の穴40内に挿入したバリ取り工具45との接触によって前記ピン1の先端が第1の穴40内面と略一致する位置まで後退する(図2)ように前記ピン1を保持するようにした。
【0011】
上記本発明の方法を実現するための装置について以下に説明する。
[第1の実施形態の構成]
図3で示すように、第2の穴41と略同径のピン1が一側から突出しているガイドピン機構2と、このガイドピン機構2を、バリ取り時の前進位置と待機時の後退位置との間を移動させる駆動機構3とから構成されている。この駆動機構3は油圧シリンダ、空圧シリンダ、リニアモータ等である。
【0012】
前記ガイドピン機構は、筒状のハウジング4内に、先端部に円錐状部5aが形成され、前記ピン1を保持しハウジング4内を軸方向に摺動可能なピンホルダ5と、前記ピン1が突出する側のハウジング4内に固定され前記ピンホルダ5の円錐状部5aがテーパ嵌合して求心案内する円錐状穴部6aが形成されたガイド部材6と、前記ピン1の突出側とは反対側の前記ハウジング4に螺合したエンドキャップ7と、このエンドキャップ7と前記ピンホルダ5との間に介装され、ピンホルダ5を前記ガイド部材6の方向に押圧付勢し、バリ取り工具45とピン1との接触によって容易にピンホルダ5を後退しうる強さに設定されたコイルスプリング9とから構成されている。
【0013】
前記駆動機構3は進退作動するロッド8を有し、このロッド8が前記ガイドピン機構2のエンドキャップ7に結合されている。
【0014】
[第1の実施形態の作用]
図1で示すように、第1の穴40と第2の穴41の交差穴を穿設加工後、前記駆動機構3を作動させ、ガイドピン機構2をワークWに接近させてピン1を第2の穴41に挿入する。このピン1の先端が第2の穴41を貫通し第1の穴40内に若干量突出する位置で駆動機構3の作動を停止する。これにより第2の穴41にバリ44が発生している側の開口部41aはピン1の先端で閉塞された状態になっている。
【0015】
この状態でバリ取り工具45を第1の穴40に挿入して前進させることによりバリ取り工具45がバリ44とピン1の先端に接触し、ピン1はバリ取り工具45に押されてコイルスプリング9の付勢力に抗してピン1の先端が第1の穴40の内面と略一致する位置まで後退し、バリ44が発生している部位をバリ取り工具45が通過してバリ44を除去する。
【0016】
この際に、第2の穴41の開口部41aが前述の通りピン1の先端で閉塞された状態になっているため、バリ44は第2の穴41内に倒れ込む(逃げる)ことなく第1の穴40内面に止どまり、バリ取り工具45によって完全に除去されるのである。
【0017】
このようなバリ除去の効果を得るには、ピン1の先端が第1の穴40の内面と略一致するまでピン1を第2の穴41に挿入し、この位置でピン1を保持するだけで足りるが、この実施形態では、ピン1の先端を第1の穴40内に突出させると共に、前記バリ取り工具45とピン1との接触によってピン1の先端が第1の穴40の内面と略一致するまで後退するようピン1を保持しているので、駆動機構3の作動によるガイドピン機構2の移動位置精度を厳格に管理しなくても、バリ取り工具45がバリ44に接触するときには、第2の穴41の開口部41aは確実に閉塞される。すなわち、駆動機構3の作動に多少の誤差があっても、ピン1の先端が第1の穴40の内面と略一致する位置に届かないようなガイドピン機構2の移動量不足が生じることがないので、バリ44の倒れ込みを許容するようなことはなくバリ44を完全に除去することができる。
【0018】
[第2の実施形態の構成]
第2の実施形態の構成は前記第1の実施形態の構成と基本的に同様である。この第2の実施形態はピン1と第2の穴41との間の調心を行う調心手段を追加したものである。すなわち、図4で示すように、エンドキャップ7に函体10を設け、駆動機構3のロッド8端に大径係合部11を形成し、ロッド8の軸部8aを前記函体10のロッド挿通孔10aに遊動隙間を持たせて貫通して、前記大径係合部11を函体10で包囲係合した構成である。
【0019】
[第2の実施形態の作用]
この第2の実施形態においては、ガイドピン機構2全体が駆動機構3のロッド8の軸線に対して、半径方向に変位が可能であるから、第2の穴41の加工誤差によってピン1と第2の穴41との間に多少のずれがあっても、ピン1が第2の穴41に倣って挿入されるので、ピン1を第2の穴41に確実に挿入することができる。
【0020】
[第3の実施形態の構成]
第3の実施形態の構成は前記第1の実施形態の構成と基本的に同様である。この第3の実施形態はガイドピン機構2のハウジング4とピン1との間の調心を行う調心手段を追加したものである。すなわち、図5で示すように、ピン1が挿通されるハウジング4内に、ピン1の外径よりも大きい径のピン挿通穴13を有するリング12を固設した構成である。
【0021】
[第3の実施形態の作用]
この第3の実施形態においても、ピン1がロッド8及びハウジング4に対して半径方向に変位が可能であるから、ピン1と第2の穴41との間に多少のずれがあってもピン1が第2の穴41に倣って挿入されるので、ピン1を第2の穴41に確実に挿入することができる。
【0022】
[その他の実施形態]
上記各実施形態のものにおいて、図6で示すように、ピン1の先端部を第1の穴40の内面と同じ曲率の凹形状である部分円筒面14にする。これにより、バリ44が発生している部位をバリ取り工具45が通過する際に、第1の穴40の内面とピン1の部分円筒面14とで略完全な円筒面が形成され、バリ44の倒れ込む余地は全くなく、より確実にバリ44が除去される。
【0023】
この場合、ピン1の回り止めが必要となるので、図7で示すように、ピンホルダ5とハウジング4の一方に設けたキー16と他方に設けたキー溝17とで回転方向を係合した構成や、図8で示すように、ピンホルダ5の円筒外周面の一部とハウジング4の円筒内周面の一部とに、互いに回転方向を係合する平坦部18,19を設けることにより容易に達成できる。
【0024】
また、上記の実施形態ではピン1とピンホルダ5は別体であるが、ピン1とピンホルダ5は一体物でも良い。
【0025】
さらには、ガイドピン機構2のコイルスプリング9を次のものに置換しても上記本発明の作用が得られる。その1つは、コイルスプリング9を廃止し、ピン1及びピンホルダ5の自重によってピン1をハウジング4から最も突出するハウジング4内の最下降位置に位置させ、バリ取り工具45との接触によって後退(上昇)できるようピン1及びピンホルダ5の質量を設定することである。
【0026】
また、他の1つは、ピンホルダ5のピン1側とハウジング4の内壁との間にコイルスプリングを介装すると共に、ピンホルダ5のピン1側とは反対側とハウジング4の内壁との間に圧力室を形成し、これに流体を供給してピンホルダ5とともにピン1をワーク方向へ付勢することである。この場合、バリ取り工具45との接触によってピン1を後退させる際には、バリ取り工具45を第1の穴40に挿入する動作に連動させて前記圧力室内を減圧し、ピン1を容易に後退できるようにする。
【0027】
上記の各実施形態では、バリ取り工具45との接触によりピン1が後退しうるように設定したが、ピン1をハウジング4に対して軸方向に相対変位しないようにハウジング4内に保持して、バリ取り工具45との接触によってピン1が後退しないようにし、バリ44とともにピン1も切削するようにもできる。これにより、バリ取り工具45に対してバリ44がいささかも逃げることがなく、完全にバリ44を除去できる。この場合のピン1の材質は、樹脂、軟金属(銅、真ちゅう、アルミ等)や木材等の軟削材が用いられる。
【0028】
尚、本発明は従来技術で例示したバランスシャフト50のバリ除去の他に、交差する潤滑油の供給穴を有する変速機のアウトプットシャフトやカウンタシャフトあるいは工作機械等のシャフト等に広く適用することができる。
【0029】
【発明の効果】
以上述べたように本発明によると、第1の穴の内面に第2の穴が開口部を有するように交差した交差穴の前記第2の穴の開口部に発生しているバリを除去するために前記第1の穴内にバリ取り工具を挿入するに際して、前記第2の穴と略同径のピンをワーク外部から第2の穴にピン先端が第1の穴内に突出する位置まで挿入することにより、前記第2の穴の開口部を閉塞して前記バリ取り工具を前記第1の穴内に挿入し、この第1の穴内に挿入したバリ取り工具との接触によって前記ピン先端が第1の穴内面と略一致する位置まで後退するように前記ピンを保持するようにしたので、バリ取り工具の挿入によるバリが第2の穴へ倒れ込むことを防止し、バリを残すことなく完全に除去することができる。
【図面の簡単な説明】
【図1】 本発明方法を示すバリ除去前の状態の要部断面図
【図2】 本発明方法を示すバリ除去後の状態の要部断面図
【図3】 本発明装置の第1実施形態を示す要部断面側面図
【図4】 本発明装置の第2実施形態を示す要部断面図
【図5】 本発明装置の第3実施形態を示す要部断面図
【図6】 先端部を部分円筒面にしたピンを示す図
【図7】 ピンの回り止め構造を示す断面図
【図8】 ピンの回り止め構造を示す断面図
【図9】 バリを除去するワークの1例を示す正面図
【図10】 交差穴のバリの発生状態を示す断面図
【図11】 従来の交差穴のバリ除去方法を示す断面図
【符号の説明】
1 ピン
2 ガイドピン機構
3 駆動機構
4 ハウジング
5 ピンホルダ
7 エンドキャップ
9 コイルスプリング
40 第1の穴
41 第2の穴
44 バリ
45 バリ取り工具
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an intersecting hole deburring method and apparatus for removing deburring generated in an opening of a hole formed in a workpiece by a deburring tool.
[0002]
[Prior art]
For example, the balance shaft 50 attached to the automobile engine shown in FIG. 9 is made of steel and is attached to the cylinder block of the engine. The cylindrical portions 42 provided at several axial positions of the balance shaft 50 include bearing bushes 43. It is supported by the cylinder block via the and rotates at high speed while the engine is running. In the balance shaft 50, an internal passage for supplying lubricating oil is formed between the outer peripheral surface of the cylindrical portion 42 and the bearing bush 43.
[0003]
The internal passage includes a first hole 40 that penetrates the balance shaft 50 in the axial direction, and a second hole 41 that opens in the first hole 40 at a cylindrical portion 42 perpendicular to the first hole 40. Formed from. In the processing of the internal passage, after the first hole 40 is drilled with a long-axis drill, the drill is cut in a direction perpendicular to the first hole 40 to drill the second hole 41.
[0004]
[Problems to be solved by the invention]
When the second hole 41 is drilled, as shown in FIG. 10, the opening 41 a of the second hole 41 serving as a drill cutout exit at the intersection of the first hole 40 and the second hole 41 is formed. Burrs 44a and 44b are generated. In order to remove the burrs 44a and 44b, a deburring tool 45 such as a drill or a wire brush is rotationally inserted into the first hole 40 from the direction of arrow A in FIG. 10 as shown in FIG.
[0005]
However, although the burr 44a on the back side in the insertion direction of the deburring tool 45 is pushed by the deburring tool 45 and escapes, the burr 44a escapes to the inner surface side of the first hole 40 and is a position that can be removed by the deburring tool 45. Although the burr 44b on the front side in the insertion direction of the deburring tool 45 can be removed, the burr 44b is pushed by the deburring tool 45 and cannot be completely removed as shown in FIG. Some of the burrs were left behind. When the burrs remain, the balance shaft 50 of the engine falls off while the engine is running, flows together with the lubricating oil, is caught between the cylindrical portion 42 and the bearing bush 43, and the balance shaft 50 rotates smoothly. It can be detrimental.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus for removing burrs in an intersecting hole that prevents burrs from falling down and enables complete deburring.
[0007]
[Means for Solving the Problems]
The method of the present invention for achieving the above-described object is as set forth in claim 1, after drilling a cross hole that intersects so that the second hole has an opening on the inner surface of the first hole. In a deburring method for an intersecting hole in which a deburring tool is inserted into the first hole to remove a burr generated at the opening of the second hole, the deburring tool is inserted into the first hole. in, by inserting the second hole and the pin of substantially the same diameter from the workpiece outside to a position where pin tip in the second bore protrudes into the first hole, and closes the opening of the second hole The deburring tool is inserted into the first hole, and the tip of the pin is retracted to a position substantially matching the inner surface of the first hole by contact with the deburring tool inserted into the first hole. It is characterized by holding a pin .
[0008]
In order to achieve the above object, an apparatus according to the present invention is characterized in that, as described in claim 2, the opening of the cross hole formed so as to cross the second hole has an opening on the inner surface of the first hole. In the deburring device of the cross hole for removing the burr occurring in the first hole by inserting a deburring tool into the first hole,
A guide pin mechanism in which a pin having substantially the same diameter as the second hole protrudes from one side, and a position where the pin is inserted into the second hole from the outside of the workpiece and the tip of the pin protrudes into the first hole A drive mechanism for moving the guide pin mechanism, and the pin is brought into contact with a deburring tool inserted into the first hole so that the tip end of the pin substantially coincides with the inner surface of the first hole. It is characterized in that it is held by a guide pin mechanism so as to move backward .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the method of the present invention, as shown in FIGS. 1 and 2, the first hole 40 is drilled in the workpiece W with a long-axis drill as in the prior art, and the drill is cut in a direction perpendicular to the first hole 40. The second hole 41 is formed by drilling a cross hole that intersects the inner surface of the first hole 40 so that the second hole 41 has an opening 41a. When the deburring tool 45 is inserted into the first hole 40 in order to remove the burr 44 generated in the opening 41a, the pin 1 having the same diameter as that of the second hole 41 is attached to the outside of the workpiece W. To the second hole 41, the opening 41a of the second hole 41 is closed with the pin 1, and the burr 44 falls into the second hole 41 by the insertion of the deburring tool 45 (escape) ) Was prevented.
[0010]
Further, the pin 1 is inserted to a position where the tip of the pin 1 protrudes into the first hole 40, and the tip of the pin 1 is brought into contact with the deburring tool 45 inserted into the first hole 40. The pin 1 is held so as to retreat to a position substantially coinciding with the inner surface of the first hole 40 (FIG. 2).
[0011]
An apparatus for realizing the method of the present invention will be described below.
[Configuration of First Embodiment]
As shown in FIG. 3, the guide pin mechanism 2 in which the pin 1 having the same diameter as the second hole 41 protrudes from one side, and the guide pin mechanism 2 are moved forward when deburring and retracted when waiting. It is comprised from the drive mechanism 3 which moves between positions. The drive mechanism 3 is a hydraulic cylinder, a pneumatic cylinder, a linear motor, or the like.
[0012]
In the guide pin mechanism, a conical portion 5a is formed at a tip end portion in a cylindrical housing 4, and a pin holder 5 that holds the pin 1 and is slidable in the housing 4 in the axial direction; The guide member 6 fixed in the projecting side housing 4 and formed with a conical hole 6a for taper-fitting the conical part 5a of the pin holder 5 to be centripetically guided is opposite to the projecting side of the pin 1 An end cap 7 screwed into the housing 4 on the side, and is interposed between the end cap 7 and the pin holder 5, presses and urges the pin holder 5 toward the guide member 6, The coil spring 9 is set to such a strength that the pin holder 5 can be easily retracted by contact with the pin 1.
[0013]
The drive mechanism 3 has a rod 8 that moves forward and backward, and this rod 8 is coupled to an end cap 7 of the guide pin mechanism 2.
[0014]
[Operation of First Embodiment]
As shown in FIG. 1, after the drilling process of the intersection hole of the first hole 40 and the second hole 41, the drive mechanism 3 is operated, the guide pin mechanism 2 is brought close to the workpiece W, and the pin 1 is moved to the first position. 2 is inserted into the hole 41. The operation of the drive mechanism 3 is stopped at a position where the tip of the pin 1 passes through the second hole 41 and slightly protrudes into the first hole 40. As a result, the opening 41 a on the side where the burr 44 is generated in the second hole 41 is closed at the tip of the pin 1.
[0015]
In this state, the deburring tool 45 is inserted into the first hole 40 and moved forward so that the deburring tool 45 comes into contact with the burr 44 and the tip of the pin 1, and the pin 1 is pushed by the deburring tool 45 and coil spring. 9 against the urging force of the pin 9, the tip of the pin 1 is retracted to a position where it substantially coincides with the inner surface of the first hole 40, and the deburring tool 45 passes through the portion where the burr 44 is generated to remove the burr 44. To do.
[0016]
At this time, since the opening 41a of the second hole 41 is closed at the tip of the pin 1 as described above, the burr 44 does not fall into (escape from) the second hole 41 and the first hole 41a is closed. It stops on the inner surface of the hole 40 and is completely removed by the deburring tool 45.
[0017]
In order to obtain such a burr removal effect, the pin 1 is inserted into the second hole 41 until the tip of the pin 1 substantially coincides with the inner surface of the first hole 40, and the pin 1 is held at this position. However, in this embodiment, the tip of the pin 1 protrudes into the first hole 40 and the tip of the pin 1 is brought into contact with the inner surface of the first hole 40 by the contact between the deburring tool 45 and the pin 1. Since the pin 1 is held so as to be retracted until it substantially matches, the deburring tool 45 comes into contact with the burr 44 without strictly managing the movement position accuracy of the guide pin mechanism 2 due to the operation of the drive mechanism 3. The opening 41a of the second hole 41 is reliably closed. That is, even if there is a slight error in the operation of the drive mechanism 3, the amount of movement of the guide pin mechanism 2 may be insufficient so that the tip of the pin 1 does not reach a position that substantially matches the inner surface of the first hole 40. Therefore, the burrs 44 can be completely removed without allowing the burrs 44 to fall down.
[0018]
[Configuration of Second Embodiment]
The configuration of the second embodiment is basically the same as the configuration of the first embodiment. In the second embodiment, alignment means for performing alignment between the pin 1 and the second hole 41 is added. That is, as shown in FIG. 4, a box 10 is provided on the end cap 7, a large-diameter engaging portion 11 is formed at the end of the rod 8 of the drive mechanism 3, and the shaft portion 8 a of the rod 8 is connected to the rod of the box 10. The large-diameter engaging portion 11 is enclosed and engaged with the box 10 through the insertion hole 10a with a loose clearance.
[0019]
[Operation of Second Embodiment]
In the second embodiment, the entire guide pin mechanism 2 can be displaced in the radial direction with respect to the axis of the rod 8 of the drive mechanism 3. Even if there is a slight deviation between the second hole 41 and the pin 1, the pin 1 is inserted following the second hole 41, so that the pin 1 can be reliably inserted into the second hole 41.
[0020]
[Configuration of Third Embodiment]
The configuration of the third embodiment is basically the same as the configuration of the first embodiment. In the third embodiment, alignment means for aligning the housing 4 and the pin 1 of the guide pin mechanism 2 is added. That is, as shown in FIG. 5, a ring 12 having a pin insertion hole 13 having a diameter larger than the outer diameter of the pin 1 is fixed in a housing 4 through which the pin 1 is inserted.
[0021]
[Operation of Third Embodiment]
Also in the third embodiment, the pin 1 can be displaced in the radial direction with respect to the rod 8 and the housing 4, so that even if there is a slight deviation between the pin 1 and the second hole 41, the pin 1 Since 1 is inserted following the second hole 41, the pin 1 can be reliably inserted into the second hole 41.
[0022]
[Other Embodiments]
In the above embodiments, as shown in FIG. 6, the tip end portion of the pin 1 is a partial cylindrical surface 14 having a concave shape with the same curvature as the inner surface of the first hole 40. Thereby, when the deburring tool 45 passes through the part where the burr 44 is generated, a substantially complete cylindrical surface is formed by the inner surface of the first hole 40 and the partial cylindrical surface 14 of the pin 1. There is no room to collapse, and the burr 44 is more reliably removed.
[0023]
In this case, since it is necessary to prevent the pin 1 from rotating, as shown in FIG. 7, the pin holder 5 and the key 16 provided on one side of the housing 4 and the key groove 17 provided on the other side are engaged in the rotational direction. Alternatively, as shown in FIG. 8, it is easy to provide flat portions 18 and 19 that engage with each other in the rotational direction on a part of the cylindrical outer peripheral surface of the pin holder 5 and a part of the cylindrical inner peripheral surface of the housing 4. Can be achieved.
[0024]
In the above embodiment, the pin 1 and the pin holder 5 are separate bodies, but the pin 1 and the pin holder 5 may be integrated.
[0025]
Furthermore, even if the coil spring 9 of the guide pin mechanism 2 is replaced with the following one, the above-described operation of the present invention can be obtained. One of them is that the coil spring 9 is abolished, the pin 1 is positioned at the lowest position in the housing 4 that protrudes most from the housing 4 due to the weight of the pin 1 and the pin holder 5, and retracts by contact with the deburring tool 45 ( The mass of the pin 1 and the pin holder 5 is set so that it can be increased.
[0026]
The other is that a coil spring is interposed between the pin 1 side of the pin holder 5 and the inner wall of the housing 4, and between the side opposite to the pin 1 side of the pin holder 5 and the inner wall of the housing 4. A pressure chamber is formed, fluid is supplied to the pressure chamber, and the pin 1 is urged together with the pin holder 5 in the work direction. In this case, when the pin 1 is retracted by contact with the deburring tool 45, the pressure chamber is depressurized in conjunction with the operation of inserting the deburring tool 45 into the first hole 40, and the pin 1 can be easily moved. Be able to retreat.
[0027]
In each of the above embodiments, the pin 1 is set so that it can be retracted by contact with the deburring tool 45. However, the pin 1 is held in the housing 4 so as not to be displaced relative to the housing 4 in the axial direction. The pin 1 can be prevented from retreating by contact with the deburring tool 45, and the pin 1 can be cut together with the burr 44. Thereby, the burr 44 does not escape at all with respect to the deburring tool 45, and the burr 44 can be completely removed. The material of the pin 1 in this case is a soft cutting material such as resin, soft metal (copper, brass, aluminum, etc.) or wood.
[0028]
In addition to the burr removal of the balance shaft 50 exemplified in the prior art, the present invention can be widely applied to output shafts of transmissions, counter shafts, shafts of machine tools, and the like having intersecting lubricating oil supply holes. it can.
[0029]
【The invention's effect】
As described above, according to the present invention, the burr generated in the opening of the second hole of the intersecting hole intersecting so that the second hole has an opening on the inner surface of the first hole is removed. Therefore, when inserting the deburring tool into the first hole, a pin having the same diameter as that of the second hole is inserted into the second hole from the outside of the workpiece to a position where the tip of the pin protrudes into the first hole. Accordingly, the opening of the second hole is closed , the deburring tool is inserted into the first hole, and the tip of the pin is brought into contact with the deburring tool inserted into the first hole. Since the pin is held so as to retreat to a position that substantially matches the inner surface of the hole , the burr caused by the insertion of the deburring tool is prevented from falling into the second hole and is completely removed without leaving a burr. can do.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part in a state before removing a burr showing the method of the present invention. FIG. 2 is a cross-sectional view of a main part in a state after removing the burr showing the method of the present invention. FIG. 4 is a cross-sectional side view of a main part showing a second embodiment of the apparatus of the present invention. FIG. 5 is a cross-sectional view of a main part of a third embodiment of the apparatus of the present invention. Fig. 7 is a sectional view showing a pin detent structure. Fig. 8 is a sectional view showing a pin detent structure. Fig. 9 is a front view showing an example of a workpiece for removing burrs. Fig. 10 is a cross-sectional view showing the state of occurrence of burrs in cross holes. Fig. 11 is a cross-sectional view showing a conventional method for removing burrs in cross holes.
DESCRIPTION OF SYMBOLS 1 Pin 2 Guide pin mechanism 3 Drive mechanism 4 Housing 5 Pin holder 7 End cap 9 Coil spring 40 1st hole 41 2nd hole 44 Deburring 45 Deburring tool

Claims (2)

第1の穴の内面に第2の穴が開口部を有するように交差する交差穴の穴明け加工後、前記第1の穴内にバリ取り工具を挿入して前記第2の穴の開口部に発生しているバリを除去する交差穴のバリ除去方法において、
前記第1の穴内にバリ取り工具を挿入するに際して、前記第2の穴と略同径のピンをワーク外部から第2の穴にピン先端が第1の穴内に突出する位置まで挿入することにより、前記第2の穴の開口部を閉塞して前記バリ取り工具を前記第1の穴内に挿入し、この第1の穴内に挿入したバリ取り工具との接触によって前記ピン先端が第1の穴内面と略一致する位置まで後退するように前記ピンを保持するようにしたことを特徴とする交差穴のバリ除去方法。
After drilling a crossing hole that intersects so that the second hole has an opening on the inner surface of the first hole, a deburring tool is inserted into the first hole to insert into the opening of the second hole. In the method of removing burrs in the cross holes to remove the generated burrs,
When inserting a deburring tool into the first hole, by inserting a pin having the same diameter as the second hole from the outside of the work into the second hole to a position where the tip of the pin protrudes into the first hole. The opening of the second hole is closed , the deburring tool is inserted into the first hole, and the pin tip comes into contact with the deburring tool inserted into the first hole. A method for removing burrs in an intersecting hole, characterized in that the pin is held so as to retract to a position substantially coinciding with an inner surface .
第1の穴の内面に第2の穴が開口部を有するように交差形成された交差穴の前記開口部に発生しているバリを前記第1の穴にバリ取り工具を挿入して除去する交差穴のバリ除去装置において、The burr generated in the opening of the intersecting hole formed so that the second hole has an opening on the inner surface of the first hole is removed by inserting a deburring tool into the first hole. In the deburring device for cross holes,
前記第2の穴と略同径のピンが一側から突出しているガイドピン機構と、前記ピンがワーク外部から第2の穴に挿入されてピンの先端が第1の穴内に突出する位置まで前記ガイドピン機構を移動させる駆動機構とを備え、前記ピンが第1の穴内に挿入したバリ取り工具との接触によってピン先端が第1の穴の内面と略一致する位置まで前記ガイドピン機構内で後退するようにガイドピン機構に保持されていることを特徴とする交差穴のバリ除去装置。  A guide pin mechanism in which a pin having substantially the same diameter as the second hole protrudes from one side, and a position where the pin is inserted into the second hole from the outside of the workpiece and the tip of the pin protrudes into the first hole A drive mechanism for moving the guide pin mechanism, and the pin is in contact with a deburring tool inserted into the first hole to reach a position where the tip of the pin substantially coincides with the inner surface of the first hole. A deburring device for a cross hole, wherein the deburring device is held by a guide pin mechanism so as to be retracted at a point.
JP06018299A 1999-03-08 1999-03-08 Cross hole deburring method and apparatus Expired - Fee Related JP4117082B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP06018299A JP4117082B2 (en) 1999-03-08 1999-03-08 Cross hole deburring method and apparatus

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KR101302824B1 (en) 2012-01-27 2013-09-02 이상동 The ber elimination equipment of hole inside internal diam-eter

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JP4827619B2 (en) * 2006-05-30 2011-11-30 Hoya株式会社 Polisher, method for manufacturing rod-shaped polisher body, and polishing apparatus
JP4801629B2 (en) * 2007-05-28 2011-10-26 三菱重工業株式会社 Cylindrical wall through-hole manufacturing method and cylindrical structure
CN102921987B (en) * 2012-11-05 2014-10-29 河北华北柴油机有限责任公司 Fine deep hole machining burr preventing method
CN104842014A (en) * 2015-06-03 2015-08-19 铜陵市永生机电制造有限责任公司 Deburring device for cross-hole inner holes different in diameter
CN112676923A (en) * 2020-12-23 2021-04-20 江苏高光半导体材料有限公司 Mask plate hole edge burr removing process

Cited By (1)

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Publication number Priority date Publication date Assignee Title
KR101302824B1 (en) 2012-01-27 2013-09-02 이상동 The ber elimination equipment of hole inside internal diam-eter

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