JP2017189795A - Method for processing work-piece, method for manufacturing motor housing, punch set, and work-piece processing device - Google Patents

Method for processing work-piece, method for manufacturing motor housing, punch set, and work-piece processing device Download PDF

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JP2017189795A
JP2017189795A JP2016080180A JP2016080180A JP2017189795A JP 2017189795 A JP2017189795 A JP 2017189795A JP 2016080180 A JP2016080180 A JP 2016080180A JP 2016080180 A JP2016080180 A JP 2016080180A JP 2017189795 A JP2017189795 A JP 2017189795A
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punch
peripheral surface
inner peripheral
workpiece
center
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章 山内
Akira Yamauchi
章 山内
堅幸 大西
Takayuki Onishi
堅幸 大西
政史 深田
Masafumi Fukada
政史 深田
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Yamauchi Eng Kk
Yamauchi Engineering Kk
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/56—Making machine elements screw-threaded elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/64—Making machine elements nuts

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  • Mechanical Engineering (AREA)
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  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a method for processing a work-piece which can perform press-molding of a recess or a protrusion on an inner peripheral surface of a cylindrical part of a work-piece.SOLUTION: A method for processing a work-piece for forming a thickness change part having a recess or a protrusion on an inner peripheral surface 2b of a cylindrical part 2a of a work-piece 2 comprises the steps in which: first punches 6 are located in a peripheral direction of the inner peripheral surface 2b in the cylindrical part 2a at intervals; a second punch 7 is located between adjacent first punches 6; the first punches 6 and the second punch 7 are moved outwards with respect to a center of the inner peripheral surface 2b; and the cylindrical part 2a, in which the first punches 6 and the second punch 7 are located, is inserted in a processing part 5a of a die 5 to perform press-molding of the thickness change part.SELECTED DRAWING: Figure 1

Description

本発明は、ワークの加工方法、モータハウジングの製造方法、パンチセット及びワークの加工装置に関し、例えば、ワークにおける円筒部の内周面に凹部又は凸部を有する厚さ変化部を成形するワークの加工方法、モータハウジングの製造方法、パンチセット及びワークの加工装置に関する。   The present invention relates to a workpiece machining method, a motor housing manufacturing method, a punch set, and a workpiece machining apparatus. For example, the workpiece is formed by forming a thickness changing portion having a concave portion or a convex portion on an inner peripheral surface of a cylindrical portion of the workpiece. The present invention relates to a machining method, a motor housing manufacturing method, a punch set, and a workpiece machining apparatus.

一般的に、ワークにおける円筒部の内周面に、シール材用の溝部、ネジ部又は多条部などの周方向に連続する凹部又は凸部を有する厚さ変化部を形成する場合、図１５に示すように、円筒絞り加工によって成形したワーク１０１における円筒部１０２の内周面１０２ａを切削用刃物１０３によって切削することで、例えば、当該内周面１０２ａに周方向で水平に連続する凹部を複数有する多条部１０２ｂを形成している。   In general, when a thickness changing portion having a concave portion or a convex portion that is continuous in the circumferential direction such as a groove portion, a screw portion, or a multi-thread portion for a sealing material is formed on the inner peripheral surface of a cylindrical portion in a work, FIG. As shown in FIG. 4, by cutting the inner peripheral surface 102a of the cylindrical portion 102 of the workpiece 101 formed by cylindrical drawing with a cutting blade 103, for example, a concave portion that is continuous horizontally in the circumferential direction is formed on the inner peripheral surface 102a. A plurality of multi-row portions 102b are formed.

ここで、特許文献１には、トラック溝成形部、内径球面成形部及びトラックチャンファ成形部を有する複数の分割パンチによって、外輪におけるカップ部分にトラック溝、球形内面部分及びトラックチャンファを形成し、その後、複数の分割パンチを縮径させてカップ部分から抜くことで等速ジョイント外輪を製造する方法が開示されている。   Here, in Patent Document 1, a track groove, a spherical inner surface portion, and a track chamfer are formed in a cup portion of the outer ring by a plurality of divided punches having a track groove forming portion, an inner diameter spherical shape forming portion, and a track chamfer forming portion. A method of manufacturing a constant velocity joint outer ring by reducing the diameter of a plurality of divided punches and pulling them out of a cup portion is disclosed.

特開２００９−１８５９３３号公報JP 2009-185933 A

上述のように、ワークにおける円筒部の内周面に、当該内周面の周方向に連続する凹部又は凸部を形成する場合、内周面を切削用刃物で切削することが一般的であり、ワークの加工コストの向上を招いている。   As described above, when a concave portion or a convex portion that is continuous in the circumferential direction of the inner peripheral surface is formed on the inner peripheral surface of the cylindrical portion of the workpiece, it is common to cut the inner peripheral surface with a cutting tool. This increases the machining cost of the workpiece.

そのため、ワークにおける円筒部の内周面に、当該内周面の周方向に連続する凹部又は凸部をプレス成形することができれば、ワークの加工コストを抑制することはできるが、ワークにおける円筒部の内周面に、当該内周面の周方向に連続する凹部又は凸部をプレス成形する技術は見聞することができない。   Therefore, if the concave portion or the convex portion continuous in the circumferential direction of the inner peripheral surface can be press-formed on the inner peripheral surface of the cylindrical portion of the workpiece, the processing cost of the workpiece can be suppressed, but the cylindrical portion of the workpiece A technique for press-molding a concave portion or a convex portion that is continuous in the circumferential direction of the inner peripheral surface cannot be observed on the inner peripheral surface.

ちなみに、特許文献１の技術を用いれば、ワークの内周面に凹部又は凸部を成形することはできるが、縮径できるように間隔を開けて複数の分割パンチを配置して凹部又は凸部を成形するため、ワークにおける内周面の周方向に凹部又は凸部を断続的に成形することしかできず、ワークにおける内周面の周方向に連続する凹部又は凸部を成形することはできない。   Incidentally, if the technique of Patent Document 1 is used, a concave portion or a convex portion can be formed on the inner peripheral surface of the workpiece, but a plurality of divided punches are arranged at intervals so that the diameter can be reduced. Therefore, it is only possible to intermittently form the recesses or protrusions in the circumferential direction of the inner peripheral surface of the work, and it is not possible to form the recesses or protrusions continuous in the circumferential direction of the inner peripheral surface of the work. .

本発明は、このような問題を解決するためになされたものであり、ワークにおける円筒部の内周面に、当該内周面の周方向に連続する凹部又は凸部をプレス成形することができるワークの加工方法、モータハウジングの製造方法、パンチセット及びワークの加工装置を実現する。   The present invention has been made to solve such a problem, and a concave portion or a convex portion continuous in the circumferential direction of the inner peripheral surface can be press-molded on the inner peripheral surface of the cylindrical portion of the work. A workpiece machining method, a motor housing manufacturing method, a punch set, and a workpiece machining apparatus are realized.

本発明の一態様に係るワークの加工方法は、ワークにおける円筒部の内周面に凹部又は凸部を有する厚さ変化部を成形するワークの加工方法であって、
第１の加工面を有する第１のパンチを、前記円筒部内で前記内周面の周方向に間隔を開けて配置する工程と、
第２の加工面を有する第２のパンチを、前記円筒部内で隣接する前記第１のパンチの間に配置する工程と、
前記第１のパンチ及び前記第２のパンチを前記内周面の中心に対して外方に向かって移動させ、前記第１のパンチの第１の加工面と前記第２のパンチの第２の加工面とで前記内周面の周方向に連続する第３の加工面を形成する工程と、
前記円筒部内に前記第１のパンチ及び前記第２のパンチが配置された当該円筒部を、ダイスの加工部内に挿入して、前記円筒部を前記ダイスで押圧し、前記厚さ変化部をプレス成形する工程と、
を備える。 The workpiece processing method according to one aspect of the present invention is a workpiece processing method for forming a thickness changing portion having a concave portion or a convex portion on an inner peripheral surface of a cylindrical portion of the workpiece,
Arranging the first punch having the first processing surface at a distance in the circumferential direction of the inner peripheral surface in the cylindrical portion;
Disposing a second punch having a second processing surface between the first punches adjacent in the cylindrical portion;
The first punch and the second punch are moved outward with respect to the center of the inner peripheral surface, and the first processed surface of the first punch and the second punch of the second punch are moved. Forming a third machining surface continuous with the machining surface in the circumferential direction of the inner circumferential surface;
The cylindrical part in which the first punch and the second punch are arranged in the cylindrical part is inserted into a die processing part, the cylindrical part is pressed with the die, and the thickness changing part is pressed. Molding process;
Is provided.

上述のワークの加工方法において、前記凹部又は前記凸部は、前記内周面の周方向に連続することが好ましい。   In the workpiece processing method described above, it is preferable that the concave portion or the convex portion is continuous in a circumferential direction of the inner peripheral surface.

上述のワークの加工方法において、
前記第１のパンチは、前記第１の加工面の両側に配置された誘導面を有し、前記第１のパンチを前記円筒部内に配置する工程において、隣接する前記第１のパンチにおける向かい合う誘導面の間隔を前記内周面の中心に対して当該内周面の径方向で外方にいくに従って狭くし、
前記第２のパンチは、前記隣接する第１のパンチにおける向かい合う誘導面に夫々接触する押し出し面を有し、前記第１のパンチの第１の加工面と前記第２のパンチの第２の加工面とで前記内周面の周方向に連続する第３の加工面を形成する工程において、前記第１のパンチの誘導面と前記第２のパンチの押し出し面とを接触させ、前記第２のパンチの押し出し面を前記第１のパンチの誘導面上で摺動させつつ当該第２のパンチの押し出し面で前記第１のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって移動させることが好ましい。 In the workpiece processing method described above,
The first punch has guide surfaces arranged on both sides of the first processing surface, and in the step of arranging the first punch in the cylindrical portion, the opposing guides in the adjacent first punches The space between the surfaces becomes narrower toward the outside in the radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface,
The second punch has an extrusion surface that is in contact with each of the opposing guide surfaces of the adjacent first punch, and the first processing surface of the first punch and the second processing of the second punch. Forming a third machining surface continuous with the circumferential surface of the inner peripheral surface with the surface, bringing the guide surface of the first punch and the extrusion surface of the second punch into contact with each other, and A radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface with the extruding surface of the second punch while sliding the extruding surface of the punch on the guide surface of the first punch It is preferable to move it outward.

上述のワークの加工方法において、先端に向かって細くなるテーパー部を有する挿入ピンを、前記テーパー部から前記内周面の周方向で前記隣接する第１のパンチにおける向かい合う誘導面の間に夫々配置された複数の前記第２のパンチの中央に挿入し、前記複数の第２のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって移動させることが好ましい。   In the workpiece processing method described above, the insertion pins each having a tapered portion that narrows toward the tip are disposed between the guide surfaces facing each other in the adjacent first punch in the circumferential direction of the inner peripheral surface from the tapered portion. It is preferable to insert the plurality of second punches into the center of the plurality of second punches and move the plurality of second punches outward in the radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface. .

上述のワークの加工方法において、前記厚さ変化部をプレス成形する工程の後に、前記複数の第２のパンチの中央に挿入した前記挿入ピンを抜き、前記第１のパンチ及び前記第２のパンチを前記内周面の中心側に移動させることが好ましい。   In the workpiece processing method described above, after the step of press forming the thickness changing portion, the insertion pin inserted in the center of the plurality of second punches is removed, and the first punch and the second punch are removed. Is preferably moved toward the center of the inner peripheral surface.

上述のワークの加工方法において、前記第２のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって引き込んで移動させることが好ましい。   In the workpiece machining method described above, it is preferable that the second punch is drawn and moved outward in the radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface.

上述のワークの加工方法において、前記ワークは、予め円筒絞り加工によって成形された円筒絞り部材であることが好ましい。   In the workpiece machining method described above, it is preferable that the workpiece is a cylindrical drawing member formed in advance by cylindrical drawing.

上述のワークの加工方法において、前記厚さ変化部は、シール材用の溝部又はネジ部又は多条部を有することが好ましい。   In the workpiece processing method described above, it is preferable that the thickness changing portion has a groove portion, a screw portion, or a multi-thread portion for a sealing material.

本発明の一態様に係るモータハウジングの製造方法は、上述のワークの加工方法を備える。   A method of manufacturing a motor housing according to an aspect of the present invention includes the above-described workpiece processing method.

本発明の一態様に係るパンチセットは、ワークにおける円筒部の内周面に凹部又は凸部を有する厚さ変化部を成形するためのパンチセットであって、
第１の加工面を有し、前記円筒部内で前記内周面の周方向に間隔を開けて配置され、前記内周面の径方向に移動する第１のパンチと、
第２の加工面を有し、前記円筒部内で隣接する前記第１のパンチの間に配置され、前記内周面の径方向に移動する第２のパンチと、
を備え、
前記第１のパンチ及び前記第２のパンチは、前記内周面の中心に対して当該内周面の径方向で外方に向かって移動した状態で、前記第１のパンチの第１の加工面と前記第２のパンチの第２の加工面とで前記内周面の周方向に連続する第３の加工面を形成する。 A punch set according to an aspect of the present invention is a punch set for forming a thickness changing portion having a concave portion or a convex portion on an inner peripheral surface of a cylindrical portion in a workpiece,
A first punch that has a first machining surface, is arranged in the cylindrical portion with a gap in the circumferential direction of the inner circumferential surface, and moves in the radial direction of the inner circumferential surface;
A second punch having a second working surface, disposed between the first punches adjacent in the cylindrical portion, and moving in a radial direction of the inner peripheral surface;
With
The first punch and the second punch are moved in the radial direction of the inner peripheral surface toward the outside with respect to the center of the inner peripheral surface, and the first processing of the first punch is performed. A third processed surface that is continuous in the circumferential direction of the inner peripheral surface is formed by the surface and the second processed surface of the second punch.

上述のパンチセットにおいて、前記第１の加工面及び前記第２の加工面は、前記内周面の周方向に連続する凹部又は凸部を有する厚さ変化部を少なくとも成形可能な形状とされていることが好ましい。   In the punch set described above, the first processing surface and the second processing surface are formed into a shape that can at least form a thickness changing portion having a concave portion or a convex portion that is continuous in the circumferential direction of the inner peripheral surface. Preferably it is.

上述のパンチセットにおいて、前記第１のパンチは、前記第１の加工面の両側に配置された誘導面を有し、隣接する前記第１のパンチにおける向かい合う誘導面の間隔を前記内周面の中心に対して当該内周面の径方向で外方にいくに従って狭くなるように、前記円筒部内に配置され、
前記第２のパンチは、前記隣接する第１のパンチにおける向かい合う誘導面に夫々接触する押し出し面を有し、前記第２のパンチが前記内周面の中心に対して当該内周面の径方向に移動する場合、前記第２のパンチの押し出し面が前記第１のパンチの誘導面上で摺動しつつ前記第１のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって移動させることが好ましい。 In the above-described punch set, the first punch has guide surfaces arranged on both sides of the first processing surface, and an interval between the guide surfaces facing each other in the adjacent first punch is set on the inner peripheral surface. It is arranged in the cylindrical part so as to become narrower toward the outside in the radial direction of the inner peripheral surface with respect to the center,
The second punch has an extrusion surface that contacts each of the opposing guide surfaces of the adjacent first punch, and the second punch is in a radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface. When the second punch is moved in the radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface, the pushing surface of the second punch slides on the guide surface of the first punch. It is preferable to move it outward.

上述のパンチセットにおいて、先端に向かって細くなるテーパー部を有し、前記内周面の周方向で前記隣接する第１のパンチにおける向かい合う誘導面の間に夫々配置された複数の前記第２のパンチの中央に挿入され、前記複数の第２のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって移動させる挿入ピンを備えることが好ましい。   In the punch set described above, a plurality of the second punches each having a taper portion that narrows toward the tip and each disposed between opposing guide surfaces of the adjacent first punch in the circumferential direction of the inner peripheral surface. It is preferable to include an insertion pin that is inserted in the center of the punch and moves the plurality of second punches outward in the radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface.

上述のパンチセットにおいて、前記第２のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって引き込む引き込み機構を備えることが好ましい。   In the punch set described above, it is preferable that a pull-in mechanism is provided that draws the second punch outward in the radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface.

本発明の一態様に係るワークの加工装置は、
上述のパンチセットと、
前記ワークを支持するワークホルダーと、
前記円筒部内に前記第１のパンチ及び前記第２のパンチが配置された前記ワークが挿入される加工部を有し、前記円筒部を押圧するダイスと、
を備える。 A workpiece processing apparatus according to an aspect of the present invention includes:
The above punch set;
A work holder for supporting the work;
A die that presses the cylindrical portion, the processing portion having the first punch and the second punch disposed in the cylindrical portion, the processing portion into which the workpiece is inserted;
Is provided.

本発明により、ワークにおける円筒部の内周面に、当該内周面の周方向に連続する凹部又は凸部をプレス成形することができるワークの加工方法、モータハウジングの製造方法、パンチセット及びワークの加工装置を実現することができる。   According to the present invention, a workpiece processing method, a motor housing manufacturing method, a punch set, and a workpiece capable of press-molding a concave portion or a convex portion continuous in the circumferential direction of the inner circumferential surface on the inner circumferential surface of the cylindrical portion of the workpiece. The processing apparatus can be realized.

実施の形態１のワークの加工装置における挿入ピンが第２のパンチの中央に挿入される前の状態を模式的に示す縦断面図である。It is a longitudinal cross-sectional view which shows typically the state before the insertion pin in the processing apparatus of Embodiment 1 is inserted in the center of the 2nd punch. 実施の形態１のワークの加工装置における第１のパンチ及び第２のパンチの動作を説明するための図である。FIG. 6 is a diagram for explaining operations of a first punch and a second punch in the workpiece machining apparatus according to the first embodiment. 実施の形態１のワークの加工装置で加工されたワークの縦断面図である。FIG. 3 is a longitudinal sectional view of a workpiece machined by the workpiece machining apparatus according to the first embodiment. 実施の形態１のワークの加工装置における挿入ピンのテーパー部が第２のパンチの中央を通過する様子を模式的に示す縦断面図である。It is a longitudinal cross-sectional view which shows typically a mode that the taper part of the insertion pin in the processing apparatus of the workpiece | work of Embodiment 1 passes the center of a 2nd punch. 実施の形態１のワークの加工装置における第１のパンチ及び第２のパンチの動作を説明するための図である。FIG. 6 is a diagram for explaining operations of a first punch and a second punch in the workpiece machining apparatus according to the first embodiment. 実施の形態１のワークの加工装置における挿入ピンのテーパー部が第２のパンチの中央を通過した状態を模式的に示す縦断面図である。It is a longitudinal cross-sectional view which shows typically the state which the taper part of the insertion pin in the processing apparatus of Embodiment 1 passed the center of the 2nd punch. 実施の形態１のワークの加工装置におけるダイスが下降した状態を模式的に示す縦断面図である。It is a longitudinal cross-sectional view which shows typically the state which the die | dye in the workpiece processing apparatus of Embodiment 1 fell. 実施の形態１のワークの加工装置における第１のパンチ及び第２のパンチの動作を説明するための図である。FIG. 6 is a diagram for explaining operations of a first punch and a second punch in the workpiece machining apparatus according to the first embodiment. 実施の形態１のワークの加工装置における挿入ピンが第２のパンチの中央から抜去される様子を模式的に示す縦断面図である。It is a longitudinal cross-sectional view which shows typically a mode that the insertion pin in the workpiece processing apparatus of Embodiment 1 is extracted from the center of the 2nd punch. 実施の形態１のワークの加工装置における第１のパンチ及び第２のパンチの動作を説明するための図である。FIG. 6 is a diagram for explaining operations of a first punch and a second punch in the workpiece machining apparatus according to the first embodiment. 実施の形態１のワークの加工装置における挿入ピンが第２のパンチの中央から抜去された状態を模式的に示す縦断面図である。It is a longitudinal cross-sectional view which shows typically the state from which the insertion pin in the workpiece processing apparatus of Embodiment 1 was extracted from the center of the 2nd punch. 実施の形態２のワークの加工装置における挿入ピンのテーパー部が第２のパンチの中央を通過する様子を模式的に示す縦断面図である。It is a longitudinal cross-sectional view which shows typically a mode that the taper part of the insertion pin in the workpiece processing apparatus of Embodiment 2 passes the center of the 2nd punch. 実施の形態３のワークの加工装置における引き込み機構によって第２のパンチを移動させる際の様子を模式的に示す縦断面図である。FIG. 10 is a longitudinal sectional view schematically showing a state when a second punch is moved by a drawing mechanism in the workpiece machining apparatus of the third embodiment. 実施の形態３のワークの加工装置における異なる引き込み機構によって第２のパンチを移動させる際の様子を模式的に示す縦断面図である。FIG. 10 is a longitudinal sectional view schematically showing a state when the second punch is moved by different drawing mechanisms in the workpiece machining apparatus of the third embodiment. ワークの内周面に当該内周面の周方向で連続する凹部を形成するための一般的な方法を説明するための図である。It is a figure for demonstrating the general method for forming the recessed part which continues in the circumferential direction of the said internal peripheral surface in the internal peripheral surface of a workpiece | work.

以下、本発明を実施するための最良の形態について、添付図面を参照しながら説明する。但し、本発明が以下の実施の形態に限定される訳ではない。また、説明を明確にするため、以下の記載及び図面は、適宜、簡略化されている。   The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. However, the present invention is not limited to the following embodiment. In addition, for clarity of explanation, the following description and drawings are simplified as appropriate.

＜実施の形態１＞
図１は、本実施の形態のワークの加工装置における挿入ピンが第２のパンチの中央に挿入される前の状態を模式的に示す縦断面図である。図２は、本実施の形態のワークの加工装置における第１のパンチ及び第２のパンチの動作を説明するための図である。図３は、本実施の形態のワークの加工装置で加工されたワークの縦断面図である。図４は、本実施の形態のワークの加工装置における挿入ピンのテーパー部が第２のパンチの中央を通過する様子を模式的に示す縦断面図である。図５は、本実施の形態のワークの加工装置における第１のパンチ及び第２のパンチの動作を説明するための図である。図６は、本実施の形態のワークの加工装置における挿入ピンのテーパー部が第２のパンチの中央を通過した状態を模式的に示す縦断面図である。図７は、本実施の形態のワークの加工装置におけるダイスが下降した状態を模式的に示す縦断面図である。図８は、本実施の形態のワークの加工装置における第１のパンチ及び第２のパンチの動作を説明するための図である。図９は、本実施の形態のワークの加工装置における挿入ピンが第２のパンチの中央から抜去される様子を模式的に示す縦断面図である。図１０は、本実施の形態のワークの加工装置における第１のパンチ及び第２のパンチの動作を説明するための図である。図１１は、本実施の形態のワークの加工装置における挿入ピンが第２のパンチの中央から抜去された状態を模式的に示す縦断面図である。 <Embodiment 1>
FIG. 1 is a longitudinal sectional view schematically showing a state before the insertion pin is inserted into the center of the second punch in the workpiece machining apparatus of the present embodiment. FIG. 2 is a diagram for explaining the operations of the first punch and the second punch in the workpiece machining apparatus according to the present embodiment. FIG. 3 is a longitudinal sectional view of a workpiece processed by the workpiece processing apparatus of the present embodiment. FIG. 4 is a vertical cross-sectional view schematically showing how the tapered portion of the insertion pin passes through the center of the second punch in the workpiece processing apparatus of the present embodiment. FIG. 5 is a view for explaining the operations of the first punch and the second punch in the workpiece machining apparatus of the present embodiment. FIG. 6 is a longitudinal sectional view schematically showing a state where the taper portion of the insertion pin passes through the center of the second punch in the workpiece machining apparatus of the present embodiment. FIG. 7 is a vertical cross-sectional view schematically showing a state in which a die is lowered in the workpiece machining apparatus of the present embodiment. FIG. 8 is a diagram for explaining the operations of the first punch and the second punch in the workpiece machining apparatus according to the present embodiment. FIG. 9 is a vertical cross-sectional view schematically showing how the insertion pin is removed from the center of the second punch in the workpiece machining apparatus of the present embodiment. FIG. 10 is a view for explaining the operations of the first punch and the second punch in the workpiece machining apparatus of the present embodiment. FIG. 11 is a longitudinal sectional view schematically showing a state in which the insertion pin is removed from the center of the second punch in the workpiece machining apparatus of the present embodiment.

なお、以下の説明では、説明を明確にするために、図１の紙面の上下方向をワークの加工装置の上下方向とし、図１の紙面に対して直交する方向をワークの加工装置の前後方向とするが、これらの方向は、ワークの加工装置の使用形態によって、適宜、変更される。   In the following description, in order to clarify the description, the vertical direction of the paper surface of FIG. 1 is the vertical direction of the workpiece processing device, and the direction perpendicular to the paper surface of FIG. However, these directions are appropriately changed depending on the usage pattern of the workpiece processing apparatus.

本実施の形態のワークの加工方法（以下、単に加工方法と省略する場合がある。）は、図１などに示すワークの加工装置（以下、単に加工装置と省略する場合がある。）１を用いて実施され、例えば、図３に示すような円筒絞り加工によって成形されたワーク２における円筒部２ａの内周面２ｂに、当該内周面２ｂの周方向で水平に連続する凹部を複数有する多条部２ｃを厚さ変化部としてプレス成形するために実施される。   The workpiece machining method of the present embodiment (hereinafter sometimes simply referred to as a machining method) is a workpiece machining apparatus (hereinafter simply abbreviated as a machining device) 1 shown in FIG. For example, the inner peripheral surface 2b of the cylindrical portion 2a of the workpiece 2 formed by cylindrical drawing as shown in FIG. 3 has a plurality of concave portions that are horizontally continuous in the circumferential direction of the inner peripheral surface 2b. This is carried out in order to press-mold the multi-threaded portion 2c as a thickness changing portion.

但し、ワーク２は、円筒絞り加工によって成形された円筒絞り部材に限定されず、鋳造品などであってもよい。また、厚さ変化部は、シール材などを収容する溝部でもよく、ワーク２の内周面２ｂの周方向に連続する凹部又は凸部を有する部分であることが好ましい。ここで、「周方向に連続」とは、凹部又は凸部が多条部２ｃのような水平に連続する場合だけでなく、ネジ部のような螺旋状に連続する場合も含み、波形、ジグザグ形などに連続していてもよい。また、凹部又は凸部におけるワーク２の円筒部２ａの軸方向の間隔は、均一であっても、不均一であってもよい。   However, the workpiece 2 is not limited to the cylindrical drawing member formed by the cylindrical drawing process, and may be a cast product or the like. Further, the thickness changing portion may be a groove portion that accommodates a sealing material or the like, and is preferably a portion having a concave portion or a convex portion that is continuous in the circumferential direction of the inner peripheral surface 2 b of the workpiece 2. Here, “continuous in the circumferential direction” includes not only the case where the concave portion or the convex portion is horizontally continuous as in the multi-threaded portion 2c but also the case where the concave portion or the convex portion is continuous in a spiral shape such as a screw portion. It may be continuous in shape. Moreover, the space | interval of the axial direction of the cylindrical part 2a of the workpiece | work 2 in a recessed part or a convex part may be uniform, or may be non-uniform | heterogenous.

先ず、本実施の形態の加工装置１の構成を簡単に説明する。加工装置１は、図１及び図２に示すように、パンチセット３、ワークホルダー４及びダイス５を備えている。パンチセット３は、第１のパンチ６及び第２のパンチ７を備えている。   First, the structure of the processing apparatus 1 of this Embodiment is demonstrated easily. The processing apparatus 1 includes a punch set 3, a work holder 4, and a die 5 as shown in FIGS. 1 and 2. The punch set 3 includes a first punch 6 and a second punch 7.

第１のパンチ６は、図１及び図２に示すように、ワーク２の内周面２ｂに多条部２ｃを少なくとも成形するための第１の加工面６ａを備えている。例えば、第１の加工面６ａは、後述するようにダイス５のワンショット（即ち、一回のプレス成形）でワーク２の内周面２ｂを所望の形状にプレス成形できる形状とされており、凸円弧面にワーク２の多条部２ｃを成形するための多条成形部（不図示）を備えている。   As shown in FIGS. 1 and 2, the first punch 6 includes a first processed surface 6 a for forming at least the multi-section portion 2 c on the inner peripheral surface 2 b of the workpiece 2. For example, the first processed surface 6a has a shape that allows the inner peripheral surface 2b of the workpiece 2 to be press-molded into a desired shape by one-shot (that is, one press molding) of the die 5 as will be described later. A multi-strip forming part (not shown) for forming the multi-strip part 2c of the workpiece 2 is provided on the convex arc surface.

そして、第１のパンチ６は、ワーク２の円筒部２ａ内で当該ワーク２の内周面２ｂの周方向に間隔を開けて配置され、ワーク２の内周面２ｂの径方向に移動する。   The first punch 6 is disposed in the cylindrical portion 2a of the work 2 with a gap in the circumferential direction of the inner peripheral surface 2b of the work 2 and moves in the radial direction of the inner peripheral surface 2b of the work 2.

第２のパンチ７は、図１及び図２に示すように、ワーク２の内周面２ｂに多条部２ｃを少なくとも成形するための第２の加工面７ａを備えている。例えば、第２の加工面７ａは、後述するようにダイス５のワンショットでワーク２の内周面２ｂを所望の形状にプレス成形できる形状とされており、凸円弧面にワーク２の多条部２ｃを成形するための多条成形部７ｂを備えている。   As shown in FIGS. 1 and 2, the second punch 7 includes a second processed surface 7 a for forming at least the multi-section portion 2 c on the inner peripheral surface 2 b of the workpiece 2. For example, the second processed surface 7a has a shape that allows the inner peripheral surface 2b of the workpiece 2 to be press-formed into a desired shape by one shot of a die 5 as will be described later. A multi-strip forming part 7b for forming the part 2c is provided.

そして、第２のパンチ７は、ワーク２の円筒部２ａ内で隣接する第１のパンチ６の間に配置され、ワーク２の内周面２ｂの径方向に移動する。   The second punch 7 is disposed between the adjacent first punches 6 in the cylindrical portion 2 a of the work 2 and moves in the radial direction of the inner peripheral surface 2 b of the work 2.

このような第１のパンチ６及び第２のパンチ７は、ワーク２の内周面２ｂの中心（なお、中心とは、厳密な意味での中心ではなく、ワーク２の加工に影響しない範囲でズレていてもよい。）に対して当該内周面２ｂの径方向で外方に向かって最も移動した状態で、第１のパンチ６の第１の加工面６ａと第２のパンチ７の第２の加工面７ａとでワーク２の内周面２ｂの周方向に連続する、パンチセット３の加工面３ａ（図８、第３の加工面）を形成する。   The first punch 6 and the second punch 7 are not the center of the inner peripheral surface 2b of the work 2 (the center is not a strict sense center and does not affect the processing of the work 2). The first processed surface 6a of the first punch 6 and the second punch 7 may be moved in the radial direction of the inner peripheral surface 2b. A machining surface 3a (FIG. 8, third machining surface) of the punch set 3 is formed in the circumferential direction of the inner circumferential surface 2b of the workpiece 2 with the second machining surface 7a.

ワークホルダー４は、ワーク２のフランジ部２ｄが収容される第１の収容部４ａを備えており、第１の収容部４ａの底面にワーク２のフランジ部２ｄが載置される。そして、ワークホルダー４は、第１のパンチ６及び第２のパンチ７を支持するパンチホルダー（不図示）が収容される第２の収容部４ｂを備えている。   The work holder 4 includes a first accommodation portion 4a in which the flange portion 2d of the workpiece 2 is accommodated, and the flange portion 2d of the workpiece 2 is placed on the bottom surface of the first accommodation portion 4a. The work holder 4 includes a second accommodating portion 4b in which a punch holder (not shown) that supports the first punch 6 and the second punch 7 is accommodated.

なお、パンチホルダーは、第１のパンチ６及び第２のパンチ７におけるワーク２の内周面２ｂの径方向への移動をガイドするためのガイド機構、及び第１のパンチ６並びに第２のパンチ７をワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方に移動した状態から当該中心側に引き戻す復帰機構などを備え、連結部材によってワークホルダー４に固定されているとよい。   The punch holder includes a guide mechanism for guiding the movement of the inner peripheral surface 2b of the workpiece 2 in the radial direction in the first punch 6 and the second punch 7, and the first punch 6 and the second punch. And a return mechanism that pulls 7 to the center side from a state where it is moved outward in the radial direction of the inner peripheral surface 2b with respect to the center of the inner peripheral surface 2b of the work 2, and is fixed to the work holder 4 by a connecting member. It is good to have.

例えば、ガイド機構としては、パンチホルダーの上面でワーク２の内周面２ｂの径方向に延在するガイドレールに沿って、第１のパンチ６及び第２のパンチ７を案内する構成を採用できるが、第１のパンチ６及び第２のパンチ７の移動をガイドできる構成であれば限定されない。   For example, as a guide mechanism, the structure which guides the 1st punch 6 and the 2nd punch 7 along the guide rail extended in the radial direction of the internal peripheral surface 2b of the workpiece | work 2 on the upper surface of a punch holder is employable. However, there is no limitation as long as the movement of the first punch 6 and the second punch 7 can be guided.

また、復帰機構としては、弾性体によって第１のパンチ６及び第２のパンチ７をワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方に移動した状態から当該中心側に引き戻す構成を採用できるが、第１のパンチ６及び第２のパンチ７を引き戻すことができる構成であれば限定されず、例えば、エアーシリンダ、油圧シリンダ又は機械式強制動作などを採用することができる。   Further, as the return mechanism, the first punch 6 and the second punch 7 are moved outward in the radial direction of the inner peripheral surface 2b with respect to the center of the inner peripheral surface 2b of the work 2 by an elastic body. Although the structure which pulls back to the said center side can be employ | adopted, it will not be limited if it is the structure which can pull back the 1st punch 6 and the 2nd punch 7, For example, an air cylinder, a hydraulic cylinder, or a mechanical forced operation | movement is employ | adopted. can do.

ダイス５は、ワークホルダー４の上方に配置されており、加工装置１の上下方向に移動する。そして、ダイス５は、ワーク２の円筒部２ａ内に第１のパンチ６及び第２のパンチ７が配置された当該ワーク２が挿入される加工部５ａを備えている。例えば、加工部５ａは、ワーク２における円筒部２ａの外径に対して若干小さい直径を有する貫通孔である。   The die 5 is disposed above the work holder 4 and moves in the vertical direction of the processing apparatus 1. The die 5 includes a processing portion 5a into which the workpiece 2 in which the first punch 6 and the second punch 7 are arranged in the cylindrical portion 2a of the workpiece 2 is inserted. For example, the processed portion 5 a is a through hole having a slightly smaller diameter than the outer diameter of the cylindrical portion 2 a in the workpiece 2.

次に、本実施の形態の加工方法を説明する。先ず、図１及び図２に示すように、ワークホルダー４の第１の収容部４ａにワーク２のフランジ部２ｄを収容し、当該第１の収容部４ａの底面にワーク２のフランジ部２ｄを載置する。   Next, the processing method of this Embodiment is demonstrated. First, as shown in FIG.1 and FIG.2, the flange part 2d of the workpiece | work 2 is accommodated in the 1st accommodating part 4a of the work holder 4, and the flange part 2d of the workpiece | work 2 is accommodated in the bottom face of the said 1st accommodating part 4a. Place.

そして、ワーク２の円筒部２ａ内で当該ワーク２の内周面２ｂの周方向に間隔を開けて第１のパンチ６（例えば、４個の第１のパンチ６）を配置する。また、ワーク２の円筒部２ａ内で隣接する第１のパンチ６の間に夫々第２のパンチ７（例えば、４個の第２のパンチ７）を配置する。このとき、第１のパンチ６及び第２のパンチ７は、パンチホルダーに支持される。なお、第１のパンチ６及び第２のパンチ７の個数は、限定されない。   And the 1st punch 6 (for example, four 1st punches 6) is arranged in the cylindrical part 2a of work 2 at intervals in the peripheral direction of inner peripheral surface 2b of the work 2 concerned. In addition, second punches 7 (for example, four second punches 7) are disposed between the first punches 6 adjacent in the cylindrical portion 2a of the workpiece 2 respectively. At this time, the first punch 6 and the second punch 7 are supported by the punch holder. The numbers of the first punch 6 and the second punch 7 are not limited.

ここで、例えば、第２のパンチ７がワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方に向かって移動するのに伴って、第１のパンチ６がワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方に向かって移動する構成とするとよい。   Here, for example, as the second punch 7 moves outward in the radial direction of the inner peripheral surface 2b with respect to the center of the inner peripheral surface 2b of the workpiece 2, the first punch 6 moves. It is good to set it as the structure which moves to the outward in the radial direction of the said internal peripheral surface 2b with respect to the center of the internal peripheral surface 2b of the workpiece | work 2. FIG.

このような構成を実現するために、第１のパンチ６は、加工装置１の上下方向から見て、第１の加工面６ａの両側に配置された誘導面６ｂを備えており、例えば、扇形である。つまり、誘導面６ｂは、第１のパンチ６における扇の要を挟んで配置されている。   In order to realize such a configuration, the first punch 6 includes guide surfaces 6b disposed on both sides of the first processing surface 6a when viewed from the vertical direction of the processing apparatus 1, for example, a fan shape. It is. In other words, the guide surface 6 b is arranged with the main fan of the first punch 6 interposed therebetween.

そして、第１のパンチ６は、隣接する第１のパンチ６における向かい合う誘導面６ｂの間隔をワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方にいくに従って狭くなるように、ワーク２の円筒部２ａ内に配置される。このとき、第１の加工面６ａがワーク２の内周面２ｂと対向するように、第１のパンチ６がワーク２の円筒部２ａ内に配置される。   And the 1st punch 6 goes to the outer side in the radial direction of the said internal peripheral surface 2b with respect to the center of the internal peripheral surface 2b of the workpiece | work 2 with respect to the center of the internal peripheral surface 2b of the workpiece | work 2 in the adjacent 1st punch 6. It arrange | positions in the cylindrical part 2a of the workpiece | work 2 so that it may become narrow. At this time, the first punch 6 is disposed in the cylindrical portion 2 a of the workpiece 2 so that the first processed surface 6 a faces the inner peripheral surface 2 b of the workpiece 2.

第２のパンチ７は、加工装置１の上下方向から見て、第２の加工面７ａの両側に配置された押し出し面７ｃを備えている。押し出し面７ｃは、第２のパンチ７が隣接する第１のパンチ６の間に配置された状態で、第１のパンチ６の誘導面６ｂに夫々面接触する。   The second punch 7 includes extrusion surfaces 7 c disposed on both sides of the second processing surface 7 a when viewed from the vertical direction of the processing apparatus 1. The extrusion surface 7c is in surface contact with the guide surface 6b of the first punch 6 in a state where the second punch 7 is disposed between the adjacent first punches 6.

そして、第２のパンチ７は、隣接する第１のパンチ６における向かい合う誘導面６ｂで形成する、ワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方にいくに従って狭くなる空間に対応する形状とされており、加工装置１の上下方向から見て、ワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方にいくに従って、押し出し面７ｃの間隔が狭くなる。   And the 2nd punch 7 goes outside in the radial direction of the said internal peripheral surface 2b with respect to the center of the internal peripheral surface 2b of the workpiece | work 2 formed in the opposing guide surface 6b in the adjacent 1st punch 6. FIG. And the shape corresponding to the space that becomes narrower according to the vertical direction of the processing apparatus 1, as it goes outward in the radial direction of the inner peripheral surface 2b with respect to the center of the inner peripheral surface 2b of the workpiece 2, The space | interval of the extrusion surface 7c becomes narrow.

次に、図４及び図５に示すように、第１のパンチ６及び第２のパンチ７をワーク２の内周面２ｂの中心に対して外方に向かって移動させる。上述のように、第２のパンチ７の移動に伴って第１のパンチ６をワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方に向かって移動させる場合、第２のパンチ７をワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方に向かって移動させる。   Next, as shown in FIGS. 4 and 5, the first punch 6 and the second punch 7 are moved outward with respect to the center of the inner peripheral surface 2 b of the work 2. As described above, when the second punch 7 is moved, the first punch 6 is moved outward in the radial direction of the inner peripheral surface 2b with respect to the center of the inner peripheral surface 2b of the workpiece 2. The second punch 7 is moved outward in the radial direction of the inner peripheral surface 2b with respect to the center of the inner peripheral surface 2b of the workpiece 2.

これにより、第２のパンチ７の押し出し面７ｃが第１のパンチ６の誘導面６ｂ上で摺動しつつ、第１のパンチ６をワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方に向かって押し出す。このとき、上述のように、パンチホルダーがガイド機構を備えていると、第１のパンチ６及び第２のパンチ７を精度良く移動させることができる。   As a result, while the extrusion surface 7 c of the second punch 7 slides on the guide surface 6 b of the first punch 6, the first punch 6 is moved to the center of the inner peripheral surface 2 b of the work 2. Pushing outward in the radial direction of the surface 2b. At this time, as described above, when the punch holder includes the guide mechanism, the first punch 6 and the second punch 7 can be moved with high accuracy.

ここで、第２のパンチ７を移動させるために、複数の第２のパンチ７の略中央に挿入ピン８を挿入するとよい。挿入ピン８は、先端に向かって細くなるテーパー部８ａを備えている。例えば、挿入ピン８は、多角柱形（例えば、八角柱形）を基本形態としており、先端部に多角錐形（八角錐形）のテーパー部８ａを備えている。   Here, in order to move the second punch 7, the insertion pin 8 may be inserted in the approximate center of the plurality of second punches 7. The insertion pin 8 includes a tapered portion 8a that becomes thinner toward the tip. For example, the insertion pin 8 has a polygonal prism shape (for example, an octagonal prism shape) as a basic form, and includes a tapered portion 8a having a polygonal pyramid shape (an octagonal pyramid shape) at the tip.

そして、挿入ピン８における第２のパンチ７と対向する面８ｂは、挿入ピン８を複数の第２のパンチ７の略中央に挿入した際に、第２のパンチ７に接触する。但し、挿入ピン８の形状は、第２のパンチ７の個数などに応じて、適宜、変更される。また、挿入ピン８の形状は、円柱形を基本形態としてもよい。   The surface 8 b of the insertion pin 8 that faces the second punch 7 comes into contact with the second punch 7 when the insertion pin 8 is inserted into the approximate center of the plurality of second punches 7. However, the shape of the insertion pin 8 is appropriately changed according to the number of the second punches 7 and the like. Further, the shape of the insertion pin 8 may be a cylindrical shape as a basic form.

これにより、テーパー部８ａを複数の第２のパンチ７の略中央に加工装置１の上方から挿入して、テーパー部８ａにおける第２のパンチ７と対向する面８ｂを第２のパンチ７に接触させた状態で、挿入ピン８を下方に押し込むと、テーパー部８ａの傾斜に倣って、複数の第２のパンチ７がワーク２の内周面２ｂの中心に対して当該内周面２ｂの径方向で外方に移動し、それに伴って、第１のパンチ６がワーク２の内周面２ｂの中央に対して内周面２ｂの径方向で外方に移動する。   Accordingly, the tapered portion 8a is inserted into the approximate center of the plurality of second punches 7 from above the processing apparatus 1, and the surface 8b of the tapered portion 8a that faces the second punch 7 is brought into contact with the second punch 7. When the insertion pin 8 is pushed downward in the state of being made, the plurality of second punches 7 have a diameter of the inner peripheral surface 2b with respect to the center of the inner peripheral surface 2b of the workpiece 2 following the inclination of the tapered portion 8a. Accordingly, the first punch 6 moves outward in the radial direction of the inner peripheral surface 2b with respect to the center of the inner peripheral surface 2b of the workpiece 2.

このとき、挿入ピン８を複数の第２のパンチ７の略中央に導くために、第２のパンチ７の上面には、複数の第２のパンチ７の略中央に向かって低くなる誘導面７ｄが形成されているとよい。誘導面７ｄは、挿入ピン８のテーパー部８ａにおける第２のパンチ７と対向する面８ｂと略面接触する。これにより、挿入ピン８を複数の第２のパンチ７の略中央に容易に挿入することができる。   At this time, in order to guide the insertion pin 8 to the approximate center of the plurality of second punches 7, the guide surface 7 d that is lowered toward the approximate center of the plurality of second punches 7 is formed on the upper surface of the second punch 7. Is good to be formed. The guide surface 7d is substantially in surface contact with the surface 8b facing the second punch 7 of the tapered portion 8a of the insertion pin 8. Thereby, the insertion pin 8 can be easily inserted into the approximate center of the plurality of second punches 7.

そして、さらに第１のパンチ６及び第２のパンチ７をワーク２の内周面２ｂの中心に対して外方に向かって移動させ、第１のパンチ６の第１の加工面６ａと第２のパンチ７の第２の加工面７ａとでワーク２の内周面２ｂの周方向に連続する、パンチセット３の加工面３ａを形成する。   Then, the first punch 6 and the second punch 7 are further moved outward with respect to the center of the inner peripheral surface 2b of the work 2, and the first processed surface 6a and the second punch 6 of the first punch 6 are moved. A processing surface 3a of the punch set 3 is formed which is continuous with the second processing surface 7a of the punch 7 in the circumferential direction of the inner peripheral surface 2b of the workpiece 2.

例えば、上述のように、挿入ピン８を用いて第１のパンチ６及び第２のパンチ７を移動させる場合、図６に示すように、加工装置１の前後方向から見て、挿入ピン８のテーパー部８ａが複数の第２のパンチ７の略中央を貫通して、少なくとも挿入ピン８における多角柱形の部分８ｃが複数の第２のパンチ７の略中央に到達するまで押し込む。   For example, as described above, when the first punch 6 and the second punch 7 are moved using the insertion pin 8, as shown in FIG. The tapered portion 8 a passes through substantially the center of the plurality of second punches 7 and is pushed in until at least the polygonal columnar portion 8 c of the insertion pin 8 reaches the substantially center of the plurality of second punches 7.

これにより、第１のパンチ６及び第２のパンチ７がワーク２の内周面２ｂの中心に対して外方に向かって移動し、第１のパンチ６の第１の加工面６ａと第２のパンチ７の第２の加工面７ａとでパンチセット３の加工面３ａを形成する。このとき、挿入ピン８における複数の第２のパンチ７の略中央から下方に突出する部分は、パンチホルダーに形成された収容部に収容される。   Accordingly, the first punch 6 and the second punch 7 move outward with respect to the center of the inner peripheral surface 2b of the workpiece 2, and the first processed surface 6a and the second punched surface 6a of the first punch 6 are moved. The processed surface 3 a of the punch set 3 is formed with the second processed surface 7 a of the punch 7. At this time, the portion of the insertion pin 8 that protrudes downward from the approximate center of the plurality of second punches 7 is accommodated in the accommodating portion formed in the punch holder.

ここで、第２のパンチ７におけるワーク２の内周面２ｂの中心側の面７ｅは、第２のパンチ７の移動方向と略直交し、挿入ピン８における第２のパンチ７と対向する面８ｂと面接触することが好ましい。これにより、挿入ピン８の挿入により、第２のパンチ７をワーク２の径方向に精度良く移動させることができる。   Here, the surface 7e on the center side of the inner peripheral surface 2b of the work 2 in the second punch 7 is a surface that is substantially orthogonal to the moving direction of the second punch 7 and faces the second punch 7 in the insertion pin 8. It is preferable to make surface contact with 8b. As a result, the second punch 7 can be accurately moved in the radial direction of the workpiece 2 by inserting the insertion pin 8.

次に、図７及び図８に示すように、ダイス５を下方に移動させて、ダイス５の加工部５ａ内に、ワーク２の円筒部２ａ内に第１のパンチ６及び第２のパンチ７が挿入された当該円筒部２ａを挿入し、ワーク２の円筒部２ａをダイス５で押圧する。   Next, as shown in FIGS. 7 and 8, the die 5 is moved downward so that the first punch 6 and the second punch 7 are moved into the machining portion 5 a of the die 5 and into the cylindrical portion 2 a of the work 2. Is inserted, and the cylindrical portion 2 a of the work 2 is pressed with a die 5.

これにより、ダイス５における加工部５ａの周面とパンチセット３の加工面３ａとの間にワーク２の円筒部２ａが挟み込まれる。このとき、上述のように、ダイス５の加工部５ａは、ワーク２における円筒部２ａの外径に対して若干小さい直径に形成されている。そのため、ダイス５の下方への押圧に伴ってワーク２の円筒部２ａが絞られ、当該円筒部２ａの一部が第１のパンチ６における第１の加工面６ａの多条成形部及び第２のパンチ７における第２の加工面７ａの多条成形部７ｂ内に収容される。   Thereby, the cylindrical part 2a of the workpiece 2 is sandwiched between the peripheral surface of the processed part 5a in the die 5 and the processed surface 3a of the punch set 3. At this time, as described above, the processed portion 5a of the die 5 is formed to have a slightly smaller diameter than the outer diameter of the cylindrical portion 2a of the workpiece 2. Therefore, the cylindrical portion 2a of the workpiece 2 is squeezed along with the downward pressing of the die 5, and a part of the cylindrical portion 2a is partly formed on the first processed surface 6a of the first punch 6 and the second portion. The punch 7 is accommodated in the multi-row forming portion 7b of the second processed surface 7a.

その結果、ワーク２の円筒部２ａが所望の厚さに形成されると共に、ワーク２の内周面２ｂに多条部２ｃが形成される。なお、ダイス５の押圧力及び下降速度などは、ワーク２における円筒部２ａの一部が良好に第１のパンチ６の多条成形部及び第２のパンチ７の多条成形部７ｂ内に収容されるように、適宜、設定される。   As a result, the cylindrical portion 2a of the workpiece 2 is formed with a desired thickness, and the multi-section portion 2c is formed on the inner peripheral surface 2b of the workpiece 2. Note that the pressing force and the lowering speed of the die 5 are such that a part of the cylindrical portion 2a of the work 2 is satisfactorily accommodated in the multi-row forming portion of the first punch 6 and the multi-row forming portion 7b of the second punch 7. Is set as appropriate.

次に、第１のパンチ６及び第２のパンチ７を、ワーク２の内周面２ｂの中心側に移動させる。例えば、上述のように、挿入ピン８を用いて第１のパンチ６及び第２のパンチ７を移動させた場合、図９及び図１０に示すように、ダイス５及び挿入ピン８を上昇させて、挿入ピン８を複数の第２のパンチ７の略中央から抜去する。これにより、第１のパンチ６及び第２のパンチ７は、ワーク２の内周面２ｂの中心側に移動可能な状態となる。   Next, the first punch 6 and the second punch 7 are moved to the center side of the inner peripheral surface 2 b of the workpiece 2. For example, when the first punch 6 and the second punch 7 are moved using the insertion pin 8 as described above, the die 5 and the insertion pin 8 are raised as shown in FIGS. The insertion pin 8 is removed from the approximate center of the plurality of second punches 7. As a result, the first punch 6 and the second punch 7 are movable to the center side of the inner peripheral surface 2 b of the workpiece 2.

そして、図１１に示すように、第１のパンチ６及び第２のパンチ７をワーク２の内周面２ｂの中心側に移動させると、ワーク２を取り出すことができる。このとき、上述のように、パンチホルダーが復帰機構を備えていると、第１のパンチ６及び第２のパンチ７をワーク２の内周面２ｂの中心側に簡単に移動させることができる。   Then, as shown in FIG. 11, when the first punch 6 and the second punch 7 are moved to the center side of the inner peripheral surface 2 b of the work 2, the work 2 can be taken out. At this time, as described above, if the punch holder includes the return mechanism, the first punch 6 and the second punch 7 can be easily moved to the center side of the inner peripheral surface 2b of the workpiece 2.

ここで、ワークとして有底円筒部を備えるワークを用いて上述の加工方法を実施し、ワークのフランジ部を削除したり、ワークの底部にモータシャフトの貫通孔を形成したり、するなどの加工をワークに施すとモータハウジングを製造することができる。   Here, the above-mentioned processing method is carried out using a workpiece having a bottomed cylindrical portion as the workpiece, and the flange portion of the workpiece is deleted, or the through hole of the motor shaft is formed in the bottom portion of the workpiece. Is applied to the workpiece, the motor housing can be manufactured.

このようなワーク２の加工方法、モータハウジングの製造方法、パンチセット３及びワーク２の加工装置１は、第１のパンチ６、及び第１のパンチ６をワーク２の円筒部２ａ内で当該ワーク２の内周面２ｂの中心に対して外方に移動させた際に生じる隙間を補完する第２のパンチ７の二種類のパンチを用いるので、ワーク２の内周面２ｂに当該内周面２ｂの周方向に連続する凹部又は凸部を有する厚さ変化部をプレス成形することができる。そのため、ワーク２の加工コストを飛躍的に抑制することができる。   The machining method of the workpiece 2, the manufacturing method of the motor housing, the punch set 3 and the machining device 1 of the workpiece 2 include the first punch 6 and the first punch 6 in the cylindrical portion 2a of the workpiece 2. Since the two types of punches of the second punch 7 that complement the gap generated when the outer peripheral surface 2b is moved outward with respect to the center of the inner peripheral surface 2b of the second workpiece 2 are used, the inner peripheral surface 2b of the workpiece 2 is used. It is possible to press-mold a thickness changing portion having a concave portion or a convex portion that is continuous in the circumferential direction 2b. Therefore, the processing cost of the workpiece 2 can be drastically suppressed.

しかも、ダイス５のワンショットでワーク２の内周面２ｂを所望の形状にプレス成形することができるので、内周面２ｂを所望の形状に加工するための他の加工を削減することができる。   In addition, since the inner peripheral surface 2b of the workpiece 2 can be press-molded into a desired shape with a single shot of the die 5, other processing for processing the inner peripheral surface 2b into a desired shape can be reduced. .

また、ワーク２として円筒絞り部材を用いると、ワーク２の加工におけるプレス成形の割合を高めることができ、ワーク２の加工コストを抑制することができる。   Moreover, when a cylindrical aperture member is used as the workpiece 2, the ratio of press molding in the processing of the workpiece 2 can be increased, and the processing cost of the workpiece 2 can be suppressed.

また、第２のパンチ７の移動に伴って第１のパンチ６を移動させる構成を採用すると、第１のパンチ６を移動させるための駆動装置を省略することができる。そのため、加工装置１の構成を簡略化することができる。なお、第１のパンチ６の誘導面６ｂ及び第２のパンチ７の押し出し面７ｃの角度（ワーク２の内周面２ｂの直径に対する傾斜角度）は、第２のパンチ７を予め設定された移動量で移動させた際に、第１のパンチ６の第１の加工面６ａと第２のパンチ７の第２の加工面７ａとで、ワーク２の内周面２ｂの周方向に連続する、パンチセット３の加工面３ａを形成することができるように設定される。   Moreover, when the structure which moves the 1st punch 6 with the movement of the 2nd punch 7 is employ | adopted, the drive device for moving the 1st punch 6 is omissible. Therefore, the structure of the processing apparatus 1 can be simplified. The angle of the guide surface 6b of the first punch 6 and the extrusion surface 7c of the second punch 7 (inclination angle with respect to the diameter of the inner peripheral surface 2b of the workpiece 2) is a predetermined movement of the second punch 7. When moved by an amount, the first machining surface 6a of the first punch 6 and the second machining surface 7a of the second punch 7 are continuous in the circumferential direction of the inner circumferential surface 2b of the workpiece 2. It is set so that the processed surface 3a of the punch set 3 can be formed.

また、挿入ピン８を複数の第２のパンチ７の中央に挿入することで、第１のパンチ６及び第２のパンチ７を移動させる構成を採用すると、第２のパンチ７を移動させるための駆動装置を削減することができる。そのため、加工装置１の構成をさらに簡略化することができる。   Moreover, when the structure which moves the 1st punch 6 and the 2nd punch 7 by inserting the insertion pin 8 in the center of several 2nd punch 7 is used, the 2nd punch 7 is moved. The number of driving devices can be reduced. Therefore, the structure of the processing apparatus 1 can be further simplified.

＜実施の形態２＞
実施の形態１の挿入ピン８は、加工装置１の下方に向かって複数の第２のパンチ７の中央に挿入しているが、図１２に示すように、加工装置の上方に向かって複数の第２のパンチ７の略中央に挿入してもよい。この場合、誘導面７ｄは、第２のパンチ７の下面に形成するとよい。 <Embodiment 2>
The insertion pin 8 according to the first embodiment is inserted into the center of the plurality of second punches 7 toward the lower side of the processing apparatus 1, but as shown in FIG. You may insert in the approximate center of the 2nd punch 7. FIG. In this case, the guide surface 7 d is preferably formed on the lower surface of the second punch 7.

＜実施の形態３＞
実施の形態１、２では、挿入ピン８を複数の第２のパンチ７の略中央に挿入することで、第２のパンチ７を移動させ、それに伴って、第１のパンチ６を移動させているが、図１３に示すように、引き込み機構３１によって第２のパンチ７を移動させ、それに伴って、第１のパンチ６を移動させてもよい。 <Embodiment 3>
In the first and second embodiments, the insertion pin 8 is inserted into the approximate center of the plurality of second punches 7 to move the second punch 7 and accordingly the first punch 6 is moved. However, as shown in FIG. 13, the second punch 7 may be moved by the pull-in mechanism 31, and the first punch 6 may be moved accordingly.

ここで、本実施の形態は、図１３に示すように、円筒部３２ａが底部３２ｂで塞がれたワーク３２の内周面３２ｃに、凹部又は凸部を有する厚さ変化部を成形する際に好適である。   Here, in the present embodiment, as shown in FIG. 13, when the thickness changing portion having the concave portion or the convex portion is formed on the inner peripheral surface 32 c of the workpiece 32 in which the cylindrical portion 32 a is closed by the bottom portion 32 b. It is suitable for.

引き込み機構３１は、例えば、突出部３１ａ及び挿入ピン３１ｂを備えている。但し、引き込み機構３１は、第２のパンチ７をワーク３２の内周面３２ｃの中心に対して外方に移動させることができる構成であれば、特に限定されない。   The retracting mechanism 31 includes, for example, a protruding portion 31a and an insertion pin 31b. However, the drawing-in mechanism 31 is not particularly limited as long as the second punch 7 can be moved outward with respect to the center of the inner peripheral surface 32c of the workpiece 32.

突出部３１ａは、第２のパンチ７がワーク３２の円筒部３２ａ内に挿入された状態で、ワーク３２と干渉しないように、第２のパンチ７からワーク３２の内周面３２ｃの中心に対して外方に突出している。そして、突出部３１ａには、挿入ピン３１ｂが挿入される挿入部３１ｃが形成されている。   The protruding portion 31a is formed from the second punch 7 to the center of the inner peripheral surface 32c of the work 32 so as not to interfere with the work 32 in a state where the second punch 7 is inserted into the cylindrical portion 32a of the work 32. Projecting outward. And the insertion part 31c in which the insertion pin 31b is inserted is formed in the protrusion part 31a.

挿入部３１ｃは、ワーク３２の内周面３２ｃの中心に対してダイス５より外方に配置されている。そして、挿入部３１ｃにおけるワーク３２の内周面３２ｃの中心に対して外方に配置された側面３１ｄには、加工装置の下方にいくに従って当該外方に傾斜する傾斜部３１ｅが形成されている。   The insertion portion 31 c is disposed outward from the die 5 with respect to the center of the inner peripheral surface 32 c of the work 32. And in the side part 31d arrange | positioned outward with respect to the center of the internal peripheral surface 32c of the workpiece | work 32 in the insertion part 31c, the inclination part 31e which inclines to the said outer side as it goes below a processing apparatus is formed. .

挿入ピン３１ｂは、挿入部３１ｃに挿入可能な断面形状を有し、先端部に加工装置の下方にいくに従ってワーク３２の内周面３２ｃの中心に対して外方に傾斜する傾斜部３１ｆが形成されている。   The insertion pin 31b has a cross-sectional shape that can be inserted into the insertion portion 31c, and an inclined portion 31f that is inclined outward with respect to the center of the inner peripheral surface 32c of the workpiece 32 is formed at the tip portion as it goes down the processing apparatus. Has been.

このような引き込み機構３１を用いて第２のパンチ７を移動させる場合、挿入ピン３１ｂの傾斜部３１ｆが突出部３１ａの傾斜部３１ｅに面接触するように、加工装置の上方に向かって挿入ピン３１ｂを突出部３１ａの挿入部３１ｃに挿入する。そして、さらに加工装置の上方に向かって挿入ピン３１ｂを移動させると、当該挿入ピン３１ｂの傾斜部３１ｆに倣って第２のパンチ７をワーク３２の内周面３２ｃの中心に対して外方に移動させることができ、それに伴い、第１のパンチ６も移動させることができる。   When the second punch 7 is moved using such a pull-in mechanism 31, the insertion pin 31b faces upward to the processing device so that the inclined portion 31f of the insertion pin 31b is in surface contact with the inclined portion 31e of the protruding portion 31a. 31b is inserted in the insertion part 31c of the protrusion part 31a. When the insertion pin 31b is further moved upward in the processing apparatus, the second punch 7 is moved outward with respect to the center of the inner peripheral surface 32c of the workpiece 32 along the inclined portion 31f of the insertion pin 31b. Accordingly, the first punch 6 can be moved accordingly.

円筒部３２ａが底部３２ｂで塞がれたワーク３２の内周面３２ｃに、厚さ変化部を成形するために、実施の形態１、２のように挿入ピン８を複数の第２のパンチ７の略中央に挿入する場合、挿入ピン８の移動量が制限されるが、本実施の形態の引き込み機構３１は、挿入ピン３１ｂの移動量が制限されないので、第２のパンチ７をワーク３２の内周面３２ｃの中心に対して外方に良好に移動させることができる。   In order to form the thickness changing portion on the inner peripheral surface 32c of the workpiece 32 in which the cylindrical portion 32a is closed by the bottom portion 32b, the insertion pin 8 is inserted into the plurality of second punches 7 as in the first and second embodiments. In the case where the insertion pin 8 is inserted, the amount of movement of the insertion pin 8 is limited. However, since the amount of movement of the insertion pin 31 b is not limited in the pull-in mechanism 31 of the present embodiment, the second punch 7 is moved to the workpiece 32. It can be favorably moved outward with respect to the center of the inner peripheral surface 32c.

上述の引き込み機構３１は、挿入ピン３１ｂを加工装置の上方に向かって突出部３１ａの挿入部３１ｃに挿入しているが、図１４に示すように、加工装置の下方に向かって突出部３１ａの挿入部３１ｃに挿入する構成でもよい。   Although the above-mentioned drawing mechanism 31 has inserted the insertion pin 31b into the insertion part 31c of the protrusion part 31a toward the upper direction of a processing apparatus, as shown in FIG. The structure inserted in the insertion part 31c may be sufficient.

なお、本実施の形態では、第２のパンチ７を引き込み機構３１で移動させ、それに伴って、第１のパンチ６も移動させているが、第１のパンチ６及び第２のパンチ７を夫々引き込み機構で移動させてもよい。   In the present embodiment, the second punch 7 is moved by the pull-in mechanism 31, and the first punch 6 is also moved accordingly. However, the first punch 6 and the second punch 7 are respectively moved. You may move with a drawing-in mechanism.

以上、本発明の実施の形態を説明したが、上述の構成に限らず、本発明の技術的思想を逸脱しない範囲で、変更することが可能である。   The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described configuration, and modifications can be made without departing from the technical idea of the present invention.

上述の実施の形態１、２では、挿入ピン８を用いて第１のパンチ６及び第２のパンチ７を移動させているが、この限りでない。例えば、アクチュエータなどを用いて第１のパンチ６及び第２のパンチ７を移動させてもよい。この場合、第１のパンチ６及び第２のパンチ７は、少なくとも加工面を備えていればよい。   In the first and second embodiments described above, the first punch 6 and the second punch 7 are moved using the insertion pin 8, but this is not restrictive. For example, the first punch 6 and the second punch 7 may be moved using an actuator or the like. In this case, the 1st punch 6 and the 2nd punch 7 should just be provided with the processed surface at least.

上述の実施の形態では、ワークの円筒部における内周面に当該内周面の周方向で水平に連続する凹部を複数有する多条部などを成形しているが、上記実施の形態と略同様にして、内周面に不連続な１つ又は複数の凹部又は凸部を成形することもできる。そのため、一部の第１のパンチの第１の加工面又は第２のパンチの第２の加工面は、厚さ変化部を成形するための成形部を有さない場合もある。   In the above-described embodiment, the multi-threaded portion having a plurality of concave portions that are horizontally continuous in the circumferential direction of the inner peripheral surface is formed on the inner peripheral surface of the cylindrical portion of the workpiece, but is substantially the same as the above-described embodiment. Thus, one or more discontinuous or convex portions that are discontinuous can be formed on the inner peripheral surface. For this reason, the first processed surface of some of the first punches or the second processed surface of the second punch may not have a forming part for forming the thickness changing part.

１ ワークの加工装置
２ ワーク、２ａ 円筒部、２ｂ 内周面、２ｃ 多条部、２ｄ フランジ部
３ パンチセット、３ａ 加工面
４ ワークホルダー、４ａ 第１の収容部、４ｂ 第２の収容部
５ ダイス、５ａ 加工部
６ 第１パンチ、６ａ 第１の加工面、６ｂ 誘導面
７ 第２のパンチ、７ａ 第２の加工面、７ｂ 多条成形部、７ｃ 押し出し面、７ｄ 誘導面、７ｅ 第２のパンチにおけるワークの内周面の中心側の面
８ 挿入ピン、８ａ テーパー部、８ｂ 挿入ピンにおける第２のパンチと対向する面、８ｃ 挿入ピンの多角柱形の部分
３１ 引き込み機構
３１ａ 突出部、３１ｃ 挿入部、３１ｄ 側面、３１ｅ 傾斜部
３１ｂ 挿入ピン、３１ｆ 傾斜部
３２ ワーク、３２ａ 円筒部、３２ｂ 底部、３２ｃ 内周面 DESCRIPTION OF SYMBOLS 1 Work processing apparatus 2 Work, 2a Cylindrical part, 2b Inner peripheral surface, 2c Multiple strip part, 2d Flange part 3 Punch set, 3a Work surface 4 Work holder, 4a 1st accommodating part, 4b 2nd accommodating part 5 Dies, 5a Processing portion 6 First punch, 6a First processing surface, 6b Guide surface 7 Second punch, 7a Second processing surface, 7b Multi-strip forming portion, 7c Extrusion surface, 7d Guide surface, 7e Second The surface on the center side of the inner peripheral surface of the workpiece in the punch of 8 No. 8 Insertion pin, 8a Tapered portion, 8b The surface of the insertion pin facing the second punch, 8c Polygonal column portion 31 of the insertion pin Retraction mechanism 31a Projection portion, 31c Insertion part, 31d Side surface, 31e Inclination part 31b Insertion pin, 31f Inclination part 32 Workpiece, 32a Cylindrical part, 32b Bottom part, 32c Inner peripheral surface

Claims (15)

ワークにおける円筒部の内周面に凹部又は凸部を有する厚さ変化部を成形するワークの加工方法であって、
第１の加工面を有する第１のパンチを、前記円筒部内で前記内周面の周方向に間隔を開けて配置する工程と、
第２の加工面を有する第２のパンチを、前記円筒部内で隣接する前記第１のパンチの間に配置する工程と、
前記第１のパンチ及び前記第２のパンチを前記内周面の中心に対して外方に向かって移動させ、前記第１のパンチの第１の加工面と前記第２のパンチの第２の加工面とで前記内周面の周方向に連続する第３の加工面を形成する工程と、
前記円筒部内に前記第１のパンチ及び前記第２のパンチが配置された当該円筒部を、ダイスの加工部内に挿入して、前記円筒部を前記ダイスで押圧し、前記厚さ変化部をプレス成形する工程と、
を備える、ワークの加工方法。 A workpiece processing method for forming a thickness changing portion having a concave portion or a convex portion on an inner peripheral surface of a cylindrical portion in a workpiece,
Arranging the first punch having the first processing surface at a distance in the circumferential direction of the inner peripheral surface in the cylindrical portion;
Disposing a second punch having a second processing surface between the first punches adjacent in the cylindrical portion;
The first punch and the second punch are moved outward with respect to the center of the inner peripheral surface, and the first processed surface of the first punch and the second punch of the second punch are moved. Forming a third machining surface continuous with the machining surface in the circumferential direction of the inner circumferential surface;
The cylindrical part in which the first punch and the second punch are arranged in the cylindrical part is inserted into a die processing part, the cylindrical part is pressed with the die, and the thickness changing part is pressed. Molding process;
A method for machining a workpiece. 前記凹部又は前記凸部は、前記内周面の周方向に連続する、請求項１に記載のワークの加工方法。   The workpiece processing method according to claim 1, wherein the concave portion or the convex portion is continuous in a circumferential direction of the inner peripheral surface. 前記第１のパンチは、前記第１の加工面の両側に配置された誘導面を有し、前記第１のパンチを前記円筒部内に配置する工程において、隣接する前記第１のパンチにおける向かい合う誘導面の間隔を前記内周面の中心に対して当該内周面の径方向で外方にいくに従って狭くし、
前記第２のパンチは、前記隣接する第１のパンチにおける向かい合う誘導面に夫々接触する押し出し面を有し、前記第１のパンチの第１の加工面と前記第２のパンチの第２の加工面とで前記内周面の周方向に連続する第３の加工面を形成する工程において、前記第１のパンチの誘導面と前記第２のパンチの押し出し面とを接触させ、前記第２のパンチの押し出し面を前記第１のパンチの誘導面上で摺動させつつ当該第２のパンチの押し出し面で前記第１のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって移動させる、請求項１又は２に記載のワークの加工方法。 The first punch has guide surfaces arranged on both sides of the first processing surface, and in the step of arranging the first punch in the cylindrical portion, the opposing guides in the adjacent first punches The space between the surfaces becomes narrower toward the outside in the radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface,
The second punch has an extrusion surface that is in contact with each of the opposing guide surfaces of the adjacent first punch, and the first processing surface of the first punch and the second processing of the second punch. Forming a third machining surface continuous with the circumferential surface of the inner peripheral surface with the surface, bringing the guide surface of the first punch and the extrusion surface of the second punch into contact with each other, and A radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface with the extruding surface of the second punch while sliding the extruding surface of the punch on the guide surface of the first punch The method for machining a workpiece according to claim 1, wherein the workpiece is moved outward. 先端に向かって細くなるテーパー部を有する挿入ピンを、前記テーパー部から前記内周面の周方向で前記隣接する第１のパンチにおける向かい合う誘導面の間に夫々配置された複数の前記第２のパンチの中央に挿入し、前記複数の第２のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって移動させる、請求項３に記載のワークの加工方法。   A plurality of second pins each having an insertion pin having a taper portion that narrows toward the tip is disposed between the guide surfaces facing each other in the adjacent first punch in the circumferential direction of the inner peripheral surface from the taper portion. The workpiece machining method according to claim 3, wherein the workpiece is inserted in a center of the punch, and the plurality of second punches are moved outward in a radial direction of the inner peripheral surface with respect to a center of the inner peripheral surface. . 前記厚さ変化部をプレス成形する工程の後に、前記複数の第２のパンチの中央に挿入した前記挿入ピンを抜き、前記第１のパンチ及び前記第２のパンチを前記内周面の中心側に移動させる、請求項４に記載のワークの加工方法。   After the step of press forming the thickness changing portion, the insertion pin inserted in the center of the plurality of second punches is pulled out, and the first punch and the second punch are moved to the center side of the inner peripheral surface. The workpiece processing method according to claim 4, wherein the workpiece is moved to a position. 前記第２のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって引き込んで移動させる、請求項３に記載のワークの加工方法。   The workpiece machining method according to claim 3, wherein the second punch is drawn and moved outward in the radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface. 前記ワークは、予め円筒絞り加工によって成形された円筒絞り部材である、請求項１乃至６のいずれか１項に記載のワークの加工方法。   The workpiece processing method according to claim 1, wherein the workpiece is a cylindrical drawing member formed in advance by cylindrical drawing. 前記厚さ変化部は、シール材用の溝部又はネジ部又は多条部を有する、請求項１乃至７のいずれか１項に記載のワークの加工方法。   8. The workpiece processing method according to claim 1, wherein the thickness changing portion includes a groove portion, a screw portion, or a multi-thread portion for a sealing material. 9. 請求項１乃至８のいずれか１項に記載のワークの加工方法を備える、モータハウジングの製造方法。   A method for manufacturing a motor housing, comprising the workpiece machining method according to claim 1. ワークにおける円筒部の内周面に凹部又は凸部を有する厚さ変化部を成形するためのパンチセットであって、
第１の加工面を有し、前記円筒部内で前記内周面の周方向に間隔を開けて配置され、前記内周面の径方向に移動する第１のパンチと、
第２の加工面を有し、前記円筒部内で隣接する前記第１のパンチの間に配置され、前記内周面の径方向に移動する第２のパンチと、
を備え、
前記第１のパンチ及び前記第２のパンチは、前記内周面の中心に対して当該内周面の径方向で外方に向かって移動した状態で、前記第１のパンチの第１の加工面と前記第２のパンチの第２の加工面とで前記内周面の周方向に連続する第３の加工面を形成する、パンチセット。 A punch set for forming a thickness changing portion having a concave portion or a convex portion on an inner peripheral surface of a cylindrical portion in a workpiece,
A first punch that has a first machining surface, is arranged in the cylindrical portion with a gap in the circumferential direction of the inner circumferential surface, and moves in the radial direction of the inner circumferential surface;
A second punch having a second working surface, disposed between the first punches adjacent in the cylindrical portion, and moving in a radial direction of the inner peripheral surface;
With
The first punch and the second punch are moved in the radial direction of the inner peripheral surface toward the outside with respect to the center of the inner peripheral surface, and the first processing of the first punch is performed. The punch set which forms the 3rd process surface which continues in the circumferential direction of the said internal peripheral surface with a surface and the 2nd process surface of the said 2nd punch. 前記第１の加工面及び前記第２の加工面は、前記内周面の周方向に連続する凹部又は凸部を有する厚さ変化部を少なくとも成形可能な形状とされている、請求項１０に記載のパンチセット。   The said 1st processed surface and the said 2nd processed surface are made into the shape which can shape | mold at least the thickness change part which has a recessed part or convex part which follows the circumferential direction of the said internal peripheral surface. The punch set described. 前記第１のパンチは、前記第１の加工面の両側に配置された誘導面を有し、隣接する前記第１のパンチにおける向かい合う誘導面の間隔を前記内周面の中心に対して当該内周面の径方向で外方にいくに従って狭くなるように、前記円筒部内に配置され、
前記第２のパンチは、前記隣接する第１のパンチにおける向かい合う誘導面に夫々接触する押し出し面を有し、前記第２のパンチが前記内周面の中心に対して当該内周面の径方向に移動する場合、前記第２のパンチの押し出し面が前記第１のパンチの誘導面上で摺動しつつ前記第１のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって移動させる、請求項１０又は１１に記載のパンチセット。 The first punch has guide surfaces arranged on both sides of the first processing surface, and the interval between the guide surfaces facing each other in the adjacent first punch is set to the inner peripheral surface with respect to the inner peripheral surface. It is arranged in the cylindrical part so as to become narrower as it goes outward in the radial direction of the peripheral surface,
The second punch has an extrusion surface that contacts each of the opposing guide surfaces of the adjacent first punch, and the second punch is in a radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface. When the second punch is moved in the radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface, the pushing surface of the second punch slides on the guide surface of the first punch. The punch set according to claim 10 or 11, wherein the punch set is moved outward by. 先端に向かって細くなるテーパー部を有し、前記内周面の周方向で前記隣接する第１のパンチにおける向かい合う誘導面の間に夫々配置された複数の前記第２のパンチの中央に挿入され、前記複数の第２のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって移動させる挿入ピンを備える、請求項１２に記載のパンチセット。   It has a taper part which becomes thin toward the tip, and is inserted in the center of the plurality of second punches respectively disposed between the guide surfaces facing each other in the adjacent first punch in the circumferential direction of the inner peripheral surface. The punch set according to claim 12, further comprising an insertion pin that moves the plurality of second punches outward in a radial direction of the inner peripheral surface with respect to a center of the inner peripheral surface. 前記第２のパンチを前記内周面の中心に対して当該内周面の径方向で外方に向かって引き込む引き込み機構を備える、請求項１２に記載のパンチセット。   The punch set according to claim 12, further comprising a drawing mechanism that draws the second punch outward in the radial direction of the inner peripheral surface with respect to the center of the inner peripheral surface. 請求項１０乃至１４のいずれか１項に記載のパンチセットと、
前記ワークを支持するワークホルダーと、
前記円筒部内に前記第１のパンチ及び前記第２のパンチが配置された前記ワークが挿入される加工部を有し、前記円筒部を押圧するダイスと、
を備える、ワークの加工装置。 The punch set according to any one of claims 10 to 14,
A work holder for supporting the work;
A die that presses the cylindrical portion, the processing portion having the first punch and the second punch disposed in the cylindrical portion, the processing portion into which the workpiece is inserted;
A workpiece processing apparatus comprising:
JP2016080180A 2016-04-13 2016-04-13 Method for processing work-piece, method for manufacturing motor housing, punch set, and work-piece processing device Pending JP2017189795A (en)

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JP2006224169A (en) * 2005-02-18 2006-08-31 Denso Corp Method for manufacturing cylindrical body, and cylindrical body
JP2012504497A (en) * 2008-10-03 2012-02-23 シーバー フォーミング ソリューションズ ゲーエムベーハー Method and apparatus for non-cutting formation of outer threads on a hollow metal workpiece

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JPS5540080A (en) * 1978-09-13 1980-03-21 Yoshiichi Sakamura Female thread forming method of nuts
JPS5557341A (en) * 1978-10-23 1980-04-28 Nissan Motor Co Ltd Spline forming method by press working
JPS577345A (en) * 1980-06-16 1982-01-14 Musashi Seimitsu Kogyo Kk Forging device for forming tooth profile on outside circumference of ringlike blank material
JPS62192226A (en) * 1986-02-17 1987-08-22 Seikosha Co Ltd Manufacture of hollow screw
JPH10156479A (en) * 1996-12-02 1998-06-16 Matsushita Electric Ind Co Ltd Thread forming method and press forming device
JP2006224169A (en) * 2005-02-18 2006-08-31 Denso Corp Method for manufacturing cylindrical body, and cylindrical body
JP2012504497A (en) * 2008-10-03 2012-02-23 シーバー フォーミング ソリューションズ ゲーエムベーハー Method and apparatus for non-cutting formation of outer threads on a hollow metal workpiece

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