JPS6343736A - Manufacture of forging piston for disk brake - Google Patents
Manufacture of forging piston for disk brakeInfo
- Publication number
- JPS6343736A JPS6343736A JP61190137A JP19013786A JPS6343736A JP S6343736 A JPS6343736 A JP S6343736A JP 61190137 A JP61190137 A JP 61190137A JP 19013786 A JP19013786 A JP 19013786A JP S6343736 A JPS6343736 A JP S6343736A
- Authority
- JP
- Japan
- Prior art keywords
- product
- piston
- cylindrical body
- die
- extrusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000005242 forging Methods 0.000 title abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000001125 extrusion Methods 0.000 claims abstract description 9
- 239000007769 metal material Substances 0.000 claims abstract 3
- 239000000463 material Substances 0.000 claims description 13
- 230000001131 transforming effect Effects 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000005097 cold rolling Methods 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 230000003245 working effect Effects 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 9
- 238000010273 cold forging Methods 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/06—Pistons
Abstract
Description
【発明の詳細な説明】
本発明は、有底円筒体の開口端面に縮径方向に突出した
フランジ部を有するディスクブレーキ用ピストンを冷間
鍛造によって製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a piston for a disc brake by cold forging, which has a flange portion protruding in a diametrical direction on an open end surface of a bottomed cylindrical body.
冷間鍛造とは熱間鍛造に対して称されるもので、焼なま
した素材を室温で型を使って行う押出し、据込みを主と
した圧縮加工であって、型を使用して押出しおよび絞り
加工によるものであるから単純な形状の製品の成形に限
られていた。Cold forging is the term used to describe hot forging, and is a compression process that mainly involves extrusion and upsetting of annealed materials using a die at room temperature. Since it is based on drawing processing, it is limited to forming products with simple shapes.
従来、本願の意図するようなフランジ部を有する複雑な
形状のピストンを造る場合には鍛造素材から旋盤等を使
用して切削加工によって内側部を削り出していたが、切
削屑が出て材料無駄が多く、シかも切削加工に長時間を
要するため量産が不可能であり、加えて製品の精度にバ
ラツキが多いという欠点を有していた。Conventionally, when making a piston with a complicated shape and a flange part as intended in this application, the inner part was cut out from a forged material using a lathe, etc., but this produced cutting waste and wasted material. There are many problems, and the cutting process takes a long time, making mass production impossible. In addition, the accuracy of the products varies widely.
本発明は、このような従来方法の欠点を解消するために
開発されたものであって、その目的とするところは、歩
留シよ〈切削加工をすることなく冷間鍛造加工のみによ
ってディスクブレー キ用ピストンを製造するものであ
って、この目的を達成するために本発明にあっては、切
削加工に代えて押出加工および絞り加工を利用すること
によって有底円筒体の開口端面に突出した７ランジ部を
有するディスクブレーキ用ピストンを製造する本のであ
る。The present invention was developed in order to eliminate the drawbacks of the conventional methods, and its purpose is to improve the yield by producing a disc brake by only cold forging without cutting. In order to achieve this objective, the present invention utilizes extrusion processing and drawing processing instead of cutting processing to produce a piston that protrudes from the open end surface of a bottomed cylindrical body. This is a book for manufacturing a disc brake piston with 7 flange parts.
以下添付図面について本発明方法を説明すると、第１図
は本発明方法によって成形きれたディスクブレーキ用ピ
ストンＡの一部切欠した斜視図であって、第２図は従来
の切削によるディスクブレーキ用ピストンＡ′であって
Ｂが切削加工によって切削する部分を示す。第３図は本
発明の冷間鍛造によって製造されるディスクブレーキ用
ピストンＡの製造工程を順を追って表した実施例図であ
シ、第４図は参考のために示す従来の切削加工による工
程順を示した実施例図を表わす。第５図は成形機の一例
を示す実施例図である。The method of the present invention will be explained below with reference to the accompanying drawings. Fig. 1 is a partially cutaway perspective view of a disc brake piston A completely formed by the method of the invention, and Fig. 2 is a conventional cutting method of a disc brake piston A. In A', B indicates the part to be cut by cutting. FIG. 3 is an example diagram showing the manufacturing process of a disc brake piston A manufactured by cold forging according to the present invention in order, and FIG. 4 is a conventional cutting process shown for reference. FIG. 3 shows an example diagram showing the order. FIG. 5 is an embodiment diagram showing an example of a molding machine.
第３図において、（ロ）は据込み工程であシ、（イ）−
゛に示すような鋼などの加工すべき材料（１）を円柱形
状、即ち庇付円筒体の外周形状に類似した形状に加工す
る第１工程であり、（ハ）は第２工程を示す。この第２
工程は押出し工程であって、ここでは第１工程（ロ）の
据込み後の材料を一端部（２）に底部（３）を有する庇
付円筒形状に加工するもので、この押出し工程において
一端部（２）及び底部（３）については製品の最終形状
に加工し、この際一端部（２）において底部（３）と円
筒部（６）との接続部位は後述の押出しや絞り加工の際
の材料の流れを良くするためにＲ形状とする。に）は第
３工程である。この第３工程は絞り工程であシ、この工
程において第２工程で成形された開口部（７）を周回シ
方向に向けて負荷をかけて絞り加工をし、この加工にお
いて縮径方向に突出部（４）が得られる。（ホ）は第４
工程である。この第４工程は押出し加工であり、第３工
程に）で得られた縮径方向に突出部（４）を有する素材
を第５図に示す鍛造用金型成形機のダイＤに押入させ、
製品の形状に枦じた形状を有するポンチＰにより負荷を
かけである。この押出し加工によって縮径方向に突出し
た７ランジ部（５）ヲ有するディスクブレーキ用鍛造ピ
ストンが得られる。In Figure 3, (b) is the upsetting process, and (b) -
This is the first step in which the material (1) to be processed, such as steel, as shown in (c) is processed into a cylindrical shape, that is, a shape similar to the outer peripheral shape of the cylindrical body with the eaves, and (c) is the second step. This second
The process is an extrusion process, in which the material after the upsetting in the first process (b) is processed into a cylindrical shape with an eave having a bottom part (3) at one end part (2). The part (2) and the bottom part (3) are processed into the final shape of the product, and at this time, the connection part between the bottom part (3) and the cylindrical part (6) at one end part (2) is processed during extrusion or drawing as described below. The rounded shape is used to improve the flow of the material. ) is the third step. This third step is a drawing step, and in this step, the opening (7) formed in the second step is drawn with a load applied in the circumferential direction. Part (4) is obtained. (e) is the fourth
It is a process. This fourth step is an extrusion process, in which the material having the protruding portion (4) in the diametrical direction obtained in the third step is pushed into the die D of the forging mold forming machine shown in FIG.
A load is applied by a punch P whose shape corresponds to the shape of the product. By this extrusion process, a forged piston for a disc brake having seven flange portions (5) protruding in the direction of diameter reduction is obtained.
本発明における冷間鍛造によるピストンの製造方法は、
第４図に示す従来からの切削による製造に比較すると、
従来法にあっては（ハ）の工程から（ロ）の製品を得る
までにおいて円筒形に成形するため中ぐシの切削を行い
Ｂ部分を切削するものであって成形に際しては時間と人
手を要し、しかも製品にバラツキが出るばかシか、Ｂ部
分が切削屑として排出されることにより材料無駄が多い
。これに対して本発明によるときは、押出しおよび絞や
加工で成形を行うためこのような無駄は皆無となり、成
形時間も短くしかも製品が美麗に仕上るものである。し
かも従来殆んど無理とみられていた縮径方向に７フンジ
を設けるような複雑形状であっても材料中のファイバー
の切断もなく製品の機械的強願も向上する第１図は本発
明方法によって加工された製品の一部切断した製品の斜
視図であり、第２図は従来法による製品の断面図、第３
図は本発明の製造工程を示す実施例図であシ、第４図は
従来法の実施例図を示す。第５図は本発明の第４工程で
使用する冷間鍛造用の成形機の実施例図である。The method for manufacturing a piston by cold forging in the present invention includes:
Compared to the conventional manufacturing by cutting shown in Fig. 4,
In the conventional method, in order to form the product into a cylindrical shape, from step (c) to obtaining the product in (b), a hollow hole is cut and part B is cut, which requires time and manpower during forming. Moreover, not only does this lead to variations in the product, but the B part is discharged as cutting waste, resulting in a lot of wasted material. On the other hand, according to the present invention, since the molding is performed by extrusion, drawing, and processing, there is no such waste, the molding time is short, and the product is beautifully finished. In addition, even with complex shapes such as seven flange in the diameter reduction direction, which was considered impossible in the past, the fibers in the material are not cut and the mechanical strength of the product is improved. Figure 1 shows the method of the present invention. FIG. 2 is a partially cutaway perspective view of a product processed by the conventional method; FIG.
The drawings show an embodiment of the manufacturing process of the present invention, and FIG. 4 shows an embodiment of the conventional method. FIG. 5 is an embodiment of a cold forging forming machine used in the fourth step of the present invention.
（１）・・・鋼材料 （２）・・・一端部 （３）・・
・底部 （４）・−・縮径方向突出７ランジ （６）・
・・円筒 （７）・・〜開口部Ｐ・・・ポンチ Ｄ・・
・ダイ Ｋ・・・ノックアウト第１図 第２図
（イ） （ロ） （ハ）
（ニ）（、ホ）１Ｎ開ＩＪｎ６３−４３７３６（３）
第５図
第４図(1)...Steel material (2)...One end (3)...
・Bottom (4)・-・7 langes protruding in the direction of diameter reduction (6)・
...Cylinder (7)...~Opening P...Punch D...
・Die K...Knockout Figure 1 Figure 2 (A) (B) (C)
(d) (, e) 1N open IJn63-43736 (3) Fig. 5 Fig. 4
Claims (1)
を一端部に底部を有する円筒体に押出す第２工程と、該
材料の開口部を縮径方向に突出部を絞り成形する第３工
程と、該材料の前記突出部を押出しによつて突出したフ
ランジ部に変形させる第４工程より成ることを特徴とし
た有底円筒体の開口端面に縮径方向に突出したフランジ
部を有するデイスクブレーキ用鍛造ピストンの製造方法
。A first step of upsetting the metal material to be machined, a second step of extruding the upsetting material into a cylindrical body having a bottom at one end, and drawing a protrusion in the diameter-reducing direction of the opening of the material. a third step, and a fourth step of transforming the protruding portion of the material into a protruding flange portion by extrusion. A method for manufacturing a forged piston for a disc brake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61190137A JPS6343736A (en) | 1986-08-12 | 1986-08-12 | Manufacture of forging piston for disk brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61190137A JPS6343736A (en) | 1986-08-12 | 1986-08-12 | Manufacture of forging piston for disk brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6343736A true JPS6343736A (en) | 1988-02-24 |
| JPH0262100B2 JPH0262100B2 (en) | 1990-12-21 |
Family
ID=16253011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61190137A Granted JPS6343736A (en) | 1986-08-12 | 1986-08-12 | Manufacture of forging piston for disk brake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6343736A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997028386A1 (en) * | 1996-02-01 | 1997-08-07 | Itt Manufacturing Enterprises, Inc. | Cold-formed piston for a hydraulic brake |
| JP2013202638A (en) * | 2012-03-28 | 2013-10-07 | Hitachi Automotive Systems Ltd | Hollow piston for disk brake and molding die |
| US11614135B2 (en) * | 2017-06-09 | 2023-03-28 | Continental Automotive Technologies GmbH | Cold-worked brake piston |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110899605B (en) * | 2019-10-12 | 2021-08-31 | 江苏力野精工科技有限公司 | Integral cold forging and stretching method for automobile chassis shock absorber shell |
-
1986
- 1986-08-12 JP JP61190137A patent/JPS6343736A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997028386A1 (en) * | 1996-02-01 | 1997-08-07 | Itt Manufacturing Enterprises, Inc. | Cold-formed piston for a hydraulic brake |
| JP2013202638A (en) * | 2012-03-28 | 2013-10-07 | Hitachi Automotive Systems Ltd | Hollow piston for disk brake and molding die |
| US11614135B2 (en) * | 2017-06-09 | 2023-03-28 | Continental Automotive Technologies GmbH | Cold-worked brake piston |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0262100B2 (en) | 1990-12-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |