CN100453810C

CN100453810C - Wheel cylinder piston manufacturing method and die therefor

Info

Publication number: CN100453810C
Application number: CNB2006100499176A
Authority: CN
Inventors: 庄海君
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-03-17
Filing date: 2006-03-17
Publication date: 2009-01-21
Anticipated expiration: 2026-03-17
Also published as: CN1844672A

Abstract

The present invention relates to a manufacture method and a die for a piston of a hydraulic brake branch pump. Firstly, ferrous material is cut into required blank. Secondly, the blank is arranged in the die and is punched to form. An upper punch head and a concave die are arranged in the die, the shape of the lower part of the upper punch head and a shaped cavity of the concave die are matched with the shape of the inner diameter of a piston and the shape of the piston. As the ferrous material directly utilizes the die to extrude and form, compared with the piston which is cast and formed by aluminum at present, the present invention has the advantages of low cost, good strength and high production efficiency.

Description

The manufacture method of hydraulic braking wheelcylinder piston and die needed

Technical field

The present invention relates to a kind of manufacture method of hydraulic braking wheelcylinder piston and die needed.

Background technique

The hydraulic vehicle braking wheelcylinder piston is the automobile common components, and the profile of this piston is cylindrical body, and one is processed with the depression circular hole.At present this piston adopts the aluminium compression molding process mostly, but with the piston of this processes moulding, except aluminium cost height, wear no resistance, aluminium will pollute operating environment in fusion process, be harmful to health.In addition, the method that adopts aluminium bar or the direct cutting moulding of iron staff is also arranged, but the greatest drawback that exists with this method is that stock utilization is low, manufacturing procedure is complicated, include operations such as blanking, end face tack, perforating, bore hole, thereby cause manufacturing efficiency very low, and after multiple operation processing, the difficult control of dimensional accuracy, processing differences is bigger, can't guarantee consistency of product.

Summary of the invention

First technical problem to be solved by this invention is to provide at above-mentioned prior art present situation that a kind of manufacturing efficiency height, cost of production are low, the manufacture method of the hydraulic braking wheelcylinder piston of good product quality.

Second technical problem to be solved by this invention is that a kind of mould that is used for said method will be provided.

The present invention solves the technological scheme that above-mentioned first technical problem adopts: iron material is utilized the die stamping moulding, specifically may further comprise the steps:

1. iron material is cut into required blank;

2. above-mentioned blank in radio frequency heating is placed on the concave die cavity of the mould that matches with piston profile;

The upper punch that matches with the piston inner diameter shape in the described mould is moved downward, the blank extrusion modling is made semi-finished product;

4. with the two-sided tack of the semi-finished product that make, make the finished product piston.

The present invention solves above-mentioned second technological scheme that technical problem adopted: the push rod that it includes upper and lower die sleeve, upper punch, die and is used for the finished product in the die is ejected, it is characterized in that described upper punch is contained on the Upper Die-sleeve, the low profile of upper punch and piston inner diameter shape match, on the die shank that described Upper Die-sleeve is connected with the outside links to each other; Described die is located on the fixture, and fix by lower die-sleeve, described die central upper portion place is provided with the die cavity that matches with piston profile, cavity bottom is provided with through hole, described push rod is fixed on the suspension arm-tie, can offset with the semi-finished product in the die by through hole, the suspension arm-tie is connected with die shank by two pull bars.

Described Upper Die-sleeve and die shank are assembled into one by scyewed joint.

Described die is contained on the mould bases that fixes with fixture, and described lower die-sleeve and mould bases are integral by scyewed joint.

Compared with prior art, the invention has the advantages that: adopt the present invention to come machining piston, both simplified operation, cost of production and raw material loss have been reduced, guaranteed quality of product simultaneously, made to have the effect of intensity, wear resistance raising than the aluminum current die cast with iron material.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention.

Fig. 2 is the schematic perspective view of the embodiment of the invention.

Fig. 3 is the perspective exploded view of Fig. 2.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

Mould of the present invention as shown in the figure, it includes Upper Die-sleeve 2, lower die-sleeve 5, upper punch 3, die 10 and push rod 8, described upper punch 3 is installed on the Upper Die-sleeve 2, its lower end profile is consistent with the internal diameter shape of piston.On die shank 1, die shank 1 is connected with press machine described Upper Die-sleeve 2 by scyewed joint.

Described die 10 is contained on the mould bases 9, and mould bases 9 fixes by bolt and worktable 6.Be provided with internal and external screw thread between described lower die-sleeve 5 and the mould bases 9, both are integral by scyewed joint.Described die 10 central upper portion places be provided with face with above-mentioned upper punch 3 and with the corresponding to die cavity 11 of piston profile, and be provided with central through bore 12 in cavity bottom.

Described push rod 8 is positioned at the worktable below, is fixed on the arm-tie 7, and arm-tie 7 suspends and is connected on two pull bars 4, and two pull bars 4 link to each other with die shank 1.Die shank 1, push rod 8 and arm-tie 7 pump under the effect of press machine like this, the semi-finished product in the die are outwards ejected by push rod with this.

Adopt above-mentioned mould to come the process of compaction piston as follows: at first according to the technical requirements of piston, iron staff is cut into required stock, the length of this blank conforms to the length of piston; Then above-mentioned blank is heated on high frequency heating machine, and be heated to the aglow state in whole blank place, make the easy extrusion modling of blank; Blank after will heating is then put into die 10, and under the effect of die shank 1 at press machine, upper punch 3, pull bar 4, arm-tie 7 and push rod 8 move vertically downward, by upper punch 3 blank is pressed into and finishes putting in place of piston profile and internal diameter physical dimension in the die cavity 11; Under the effect of press machine, die shank 1 drives upper punch 3 and returns, and drives pull bar 4, arm-tie 7 and push rod 8 simultaneously and moves upward again, and push rod 8 enters in die 10 bottom through-holes, and when moving to top dead center, push rod 8 outwards ejects the semi-finished product in the die 10; Again this semi-finished product piston is made two-sided tack at last and handle, promptly make profile and be cylindrical body, the finished product piston that the depression circular hole is arranged.

Similar with the inventive method, the manufacturing of piston also can be adopted cold extrusion shaped method.Be about to iron material, utilize the continuous impact briquetting of array mould, finally make profile and be cylindrical body, the finished product piston that the depression circular hole is arranged.But the molded piston that makes of this method relatively hot, operation is many, and manufacturing efficiency is low.

The present invention is because the employing iron material directly utilizes the mould extrusion modling, thereby the piston that adopts the aluminium die cast to make more at present, and cost is lower, intensity is better, and manufacturing efficiency is higher.

Claims

1, a kind of manufacture method of hydraulic braking wheelcylinder piston is characterized in that: 1. iron material is cut into required blank; 2. above-mentioned blank in radio frequency heating is placed on the concave die cavity (11) of the mould that matches with piston profile; The upper punch (3) that matches with the piston inner diameter shape in the described mould is moved downward, the blank extrusion modling is made semi-finished product; 4. with the two-sided tack of the semi-finished product that make, make the finished product piston.

2, a kind of mould that is used for the described method of claim 1, the push rod (8) that it includes upper and lower die sleeve (2,5), upper punch (3), die (10) and is used for the finished product in the die is ejected, it is characterized in that: described upper punch (3) is contained on the Upper Die-sleeve (2), the low profile and the piston inner diameter shape of upper punch (3) match, and described Upper Die-sleeve (2) is connected on the die shank (1) that links to each other with the outside; Described die (10) is located on the fixture, and it is fixing by lower die-sleeve (5), described die (10) central upper portion place is provided with the die cavity (11) that matches with piston profile, cavity bottom is provided with through hole (12), described push rod (8) is fixed on the suspension arm-tie (7), can offset with the semi-finished product in the die by through hole, suspension arm-tie (7) is connected with die shank (1) by two pull bars (4).

3, mould as claimed in claim 2 is characterized in that: described Upper Die-sleeve (2) is a scyewed joint with die shank (1).

4, mould as claimed in claim 2 is characterized in that: described die (10) is contained on the mould bases (9) that fixes with fixture, and described lower die-sleeve (5) is integral by scyewed joint with mould bases (9).