JPH0262100B2 - - Google Patents
Info
- Publication number
- JPH0262100B2 JPH0262100B2 JP61190137A JP19013786A JPH0262100B2 JP H0262100 B2 JPH0262100 B2 JP H0262100B2 JP 61190137 A JP61190137 A JP 61190137A JP 19013786 A JP19013786 A JP 19013786A JP H0262100 B2 JPH0262100 B2 JP H0262100B2
- Authority
- JP
- Japan
- Prior art keywords
- product
- piston
- extrusion
- cylindrical body
- die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 10
- 239000007769 metal material Substances 0.000 claims abstract 3
- 239000000463 material Substances 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 230000001131 transforming effect Effects 0.000 claims 1
- 238000005242 forging Methods 0.000 abstract description 4
- 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 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000007796 conventional method Methods 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
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Forging (AREA)
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イスクブレーキ用
ピストンを冷却鍛造によつて製造する方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a disc brake piston having a flange portion protruding in a diametrical direction on an open end surface of a bottomed cylindrical body by cooling forging.
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つて行う押出
し、据込みを主とした圧縮加工であつて、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 primarily 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つて内側部を
削り出していたが、切削屑が出て材料無駄が多
く、し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 that has a flange part as intended in the present application, the inner part was cut out from a forged material using a lathe, etc., but cutting waste was generated. There is a lot of wasted material, 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つて、その目的とす
るところは、歩留りよく切削加工をすることなく
冷間鍛造加工のみによつてデイスクブレーキ用ピ
ストンの製造をするものであつて、この目的を達
成するために本発明にあつては、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つ
て有底円筒体の開口端面に突出したフランジ部を
有するデイスクブレーキ用ピストンを製造するも
のである。 The present invention was developed to eliminate the drawbacks of the conventional methods, and its purpose is to manufacture disc brakes with a high yield by only cold forging without cutting. The purpose of the present invention is to manufacture pistons, and to achieve this purpose, extrusion and drawing are used instead of cutting to create a piston that protrudes from the open end surface of a cylindrical body with a bottom. The present invention is to manufacture a piston for a disc brake having a flange portion.
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つて成形されたデイ
スクブレーキ用ピストンＡの一部切欠した斜視図
であつて、第２図は従来の切削によるデイスクブ
レーキ用ピストンA′であつてＢが切削加工によ
つて切削する部分を示す。第３図は本発明の冷間
鍛造によつて製造されるデイスクブレーキ用ピス
トンＡの製造工程を順を追つて表した実施例図で
あり、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. Figure 1 is a partially cutaway perspective view of a disc brake piston A formed by the method of the present invention, and Figure 2 is a conventional disc brake piston A formed by cutting. B shows the part of piston A' that is 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. 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り、イに
示すような鋼などの加工すべき材料１を円柱形
状、即ち底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つて、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
有する底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。ニは第３工程である。この第３工程は
絞り工程であり、この工程において第２工程で成
形された開口部７を周回り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工程ニで得ら
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
の形状に応じた形状を有するポンチＰにより負荷
をかけて押出し加工をする。図中のＫはノツクア
ウトである。この押出し加工によつて縮径方向に
突出したフランジ部５を有するデイスクブレーキ
用鍛造ピストンが得られる。 In Fig. 3, B is an upsetting process, which is the first process of processing the material 1 to be processed, such as steel, as shown in A, into a cylindrical shape, that is, a shape similar to the outer peripheral shape of a cylindrical body with a bottom. , C indicate the second step.
This second step is an extrusion step, in which the material after upsetting in the first step B is processed into a bottomed cylindrical shape having a bottom 3 at one end 2. The bottom part 3 is 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 rounded in order to improve the flow of material during extrusion and drawing processing, which will be described later. . D is the third step. This third step is a drawing step, in which the opening 7 formed in the second step is drawn by applying a load in the circumferential direction, and in this step, the protruding portion 4 is drawn in the diameter reduction direction. can get. E is the fourth step. This fourth step is extrusion processing, in which the material having the protruding portion 4 in the diameter reduction direction obtained in the third step D is pushed into the die D of the forging mold forming machine shown in FIG. The extrusion process is performed by applying a load using a punch P having a shape corresponding to the shape. K in the figure is knockout. By this extrusion process, a forged piston for a disc brake having a flange portion 5 protruding in the diametrical direction 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、従来法にあつてはハの工程からニ
の製品を得るまでにおいて円筒形に成形するため
中ぐりの切削を行いＢ部分を切削するものであつ
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りか、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、押出しおよび絞り加
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
縮径方向にフランジを設けるような複雑形状であ
つても材料中のフアイバーの切断もなく製品の機
械的強願も向上するという従来にみられない画期
的効果を奏する。 The method for manufacturing a piston by cold forging according to the present invention is different from the conventional manufacturing method by cutting shown in FIG. The B part is cut by boring, which requires time and manpower during molding, and not only does the product vary, but the B part is discharged as cutting waste, resulting in a lot of material waste. On the other hand, according to the present invention, since the molding is performed by extrusion and drawing, such waste is completely eliminated, the molding time is short, and the product is beautifully finished. Moreover, even if the shape is complex, such as having a flange in the direction of diameter reduction, which was considered almost impossible in the past, the fibers in the material will not be cut and the mechanical strength of the product will be improved, an unprecedented breakthrough. It has the desired effect.
第１図は本発明方法によつ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り、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。
１……鋼材料、２……一端部、３……底部、４
……縮径方向突出フランジ、６……円筒、７……
開口部、Ｐ……ポンチ、Ｄ……ダイ、Ｋ……ノツ
クアウト。
FIG. 1 is a partially cutaway perspective view of a product processed by the method of the present invention, FIG. 2 is a sectional view of a product processed by the conventional method, and FIG. 3 is an implementation showing the manufacturing process of the present invention. This is an example diagram, and FIG. 4 shows an example diagram of a conventional method. FIG. 5 is an embodiment of a cold forging forming machine used in the fourth step of the present invention. 1... Steel material, 2... One end, 3... Bottom, 4
...Protruding flange in the direction of diameter reduction, 6... Cylindrical, 7...
Opening, P...Punch, D...Die, K...Knock out.
Claims (1)
据込み材料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。1. A first step of upsetting the metal material to be processed, 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. and a fourth step of transforming the protruding part of the material into a protruding flange part by extrusion. A method for manufacturing a forged piston for a disc brake having the following.
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 JPS6343736A (en) | 1988-02-24 |
| JPH0262100B2 true 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110899605A (en) * | 2019-10-12 | 2020-03-24 | 江苏力野精工科技有限公司 | Integral cold forging and stretching method for automobile chassis shock absorber shell |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19603586A1 (en) * | 1996-02-01 | 1997-08-07 | Teves Gmbh Alfred | Cold-formed piston for a hydraulic brake |
| JP5798965B2 (en) * | 2012-03-28 | 2015-10-21 | 日立オートモティブシステムズ株式会社 | Hollow piston for disk brake and molding die |
| DE102017214540A1 (en) * | 2017-06-09 | 2018-12-13 | Continental Teves Ag & Co. Ohg | Cold formed brake piston |
-
1986
- 1986-08-12 JP JP61190137A patent/JPS6343736A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110899605A (en) * | 2019-10-12 | 2020-03-24 | 江苏力野精工科技有限公司 | Integral cold forging and stretching method for automobile chassis shock absorber shell |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6343736A (en) | 1988-02-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |