CN105312349A - Method of increasing deformation quantity of cylinder bottom of metal backward-extrusion cylindrical part - Google Patents
Method of increasing deformation quantity of cylinder bottom of metal backward-extrusion cylindrical part Download PDFInfo
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- CN105312349A CN105312349A CN201410299423.8A CN201410299423A CN105312349A CN 105312349 A CN105312349 A CN 105312349A CN 201410299423 A CN201410299423 A CN 201410299423A CN 105312349 A CN105312349 A CN 105312349A
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- mandrel
- blank
- backward extrusion
- baffle plate
- cylindrical member
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Abstract
The invention relates to a method of increasing deformation quantity of a cylinder bottom of a metal backward-extrusion cylindrical part and belongs to the field of metal extrusion moulding. The method includes the following steps: 1) processing an end of a core shaft of a mould into a convex circular-arc-shaped surface and a baffle into a concave circular-arc-shaped surface; 2) fixing the core shaft to a main piston of an extrusion machine and fixing the end of the core shaft to the core shaft so that the core shaft and the end of the core shaft are assembled to form a male die; 3) fixing an extrusion cylinder to a movable cross beam of the extrusion machine and fixing the baffle to a front rack of the extrusion machine so that the extrusion cylinder and the baffle are assembled to form a female die; and 4) placing a metal blank into the extrusion cylinder to perform backward extrusion. In an initial stage of deformation of the blank, the blank is closed to the concave circular-arc-shaped surface of the baffle and is subjected to plastic deformation under direct effect of the end of a core shaft, so that the concave circular-arc-shaped surface is flattened gradually; during continuous deformation, the bottom of the blank enters the circular-arc-shaped concave groove in the baffle to form the cylinder bottom having the convex circular-arc-shaped surface. The method greatly increases the deformation quantity of a cylinder bottom of a cylindrical part in backward extrusion, which can improve the mechanical performance of the cylinder bottom.
Description
Technical field
The present invention relates to a kind of method increasing deflection at the bottom of metal backward extrusion cylindrical member cylinder, belong to metallic extrusion molding field.
Background technology
At present, during metal cylindrical member backward extrusion, the blank usually adopted is regular cylindrical, and mould is planar base surface.When backward extrusion is out of shape there is larger stretching class distortion in bowl wall portion, and cylinder bottom part deflection is explained inadequate relative to barrel.The plastic deformation of metal is the essential condition of improving product intensity and other combination properties.Therefore the performance boost effect that cylinder bottom part is brought by plastic deformation is weaker than bowl wall portion, causes the overall performance of finished product not high.Therefore, be necessary that proposing a kind of new technical scheme solves the problems referred to above.
Summary of the invention
The object of the present invention is to provide a kind of method increasing deflection at the bottom of metal backward extrusion cylindrical member cylinder, it can enlarge markedly deflection at the bottom of the cylinder of the metal cylindrical member of backward extrusion.
To achieve these goals, the present invention takes following technical scheme:
Increase a method for deflection at the bottom of metal backward extrusion cylindrical member cylinder, comprise the steps:
(1) outer convex arc surface is processed in the mandrel termination of mould, and baffle plate is processed into interior concaved circular cambered surface;
(2) be fixed on the main piston of extruder by mandrel, mandrel termination is fixed on mandrel, and mandrel and core shaft end's head group are closed and formed punch; Recipient is fixed on extruder moving beam, and baffle plate is fixed on the forebay of extruder, and recipient and baffle combination form die;
(3) metal stock is put into recipient, carry out backward extrusion; In the blank deformation starting stage, there is plastic deformation near the concave shaped arc surface of baffle plate in blank, concave shaped arc surface flattens gradually under the direct effect of mandrel termination; When continuing distortion, bottom blank, start the circular arc inner groovy entering baffle plate, formed and have at the bottom of the cylinder of spirogyrate arc surface.
The side machining of described blank goes out interior concaved circular cambered surface, and when putting into recipient, blank has the side of concaved circular cambered surface near baffle plate.
Between the outer convex arc surface of described mandrel termination and the interior concaved circular cambered surface of baffle plate, there is certain matching relationship, at the bottom of both coordinate and are shaped tin.
Described mandrel termination is threaded connection and is fixed on mandrel; Described recipient contacts with baffle-panels.
Described backward extrusion comprises mould and die preheating, blank preheating and pressing steps; Described mould and die preheating comprises recipient preheating, baffle plate preheating, mandrel and the preheating of mandrel termination.
By the geomery of concaved circular cambered surface in concaved circular cambered surface in change mandrel termination evagination arc surface, baffle plate and blank, different amount of plastic deformation can be realized bottom cylindrical member.
The present invention is by being processed into outer convex arc surface by the mandrel termination of mould, baffle plate is processed into interior concaved circular cambered surface, these two arc surfaces have certain matching relationship, the bottom surface machining of simultaneously metal stock being pressed close to baffle plate side goes out concaved circular cambered surface in specific dimensions, deflection when can enlarge markedly backward extrusion at the bottom of cylindrical member cylinder.
Compared with cylindrical member backward extrusion method general at present, deflection when the method can enlarge markedly backward extrusion at the bottom of cylindrical member cylinder.The plastic deformation of metal is the essential condition ensureing its combination property, and the amount of plastic deformation increased at the bottom of cylinder contributes to the mechanical property increasing position bottom cylinder.
Accompanying drawing explanation
Fig. 1 is that the inventive method is starting the schematic diagram before backward extrusion.
Fig. 2 is the schematic diagram of backward extrusion distortion starting stage.
Fig. 3 is the schematic diagram in the end of a period stage of backward extrusion distortion.
Main Reference Numerals:
1 mandrel 2 mandrel termination
3 recipient 4 blanks
5 baffle plates
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
The method of deflection at the bottom of increase metal backward extrusion cylindrical member cylinder of the present invention, the process units of employing comprises mandrel 1, mandrel termination 2, recipient 3, baffle plate 5, comprises the steps:
(1) outer convex arc surface is processed in the mandrel termination 2 of mould, and baffle plate 5 is processed into interior concaved circular cambered surface, these two arc surfaces have certain matching relationship, at the bottom of both coordinate and are shaped tin; At the bottom of being pressed close to by metal stock 4 tin, the bottom surface machining of side goes out concaved circular cambered surface in certain size simultaneously.
(2) be fixed on the main piston of extruder by mandrel 1, mandrel termination 2 is fixed on to be threaded on mandrel 1, and mandrel 1 and mandrel termination 2 are combined and formed punch; Recipient 3 is fixed on extruder moving beam, and baffle plate 5 is fixed on the forebay of extruder, and recipient 3 contacts with 5, baffle plate, and recipient 3 and baffle plate 5 combine and form die.Active force between recipient 3 and baffle plate 5, is controlled by the active force between crossbeam and forebay.
(3) metal stock 4 is put into recipient 3, blank 4 has the side of interior concaved circular cambered surface near baffle plate 5, carries out backward extrusion; Be out of shape the starting stage at blank 4, there is plastic deformation near the concave shaped arc surface of baffle plate 5 in blank 4, concave shaped arc surface flattens gradually under the direct effect of mandrel termination 2; When continuing distortion, bottom blank 4, start the circular arc inner groovy entering baffle plate 5, formed and have at the bottom of the cylinder of spirogyrate arc surface.
In said method, described backward extrusion comprises mould and blank preheating and pressing steps, and mould and die preheating comprises recipient 3 preheating, baffle plate 5 preheating, mandrel 1 and mandrel termination 2 preheating.
Described backward extrusion step is as follows:
As shown in Figure 1, first load in recipient 3 by preheated metal ingot 4, the circular arc inner concave of blank 4 is towards the direction of baffle plate 5;
As shown in Figure 2, the front end controlling mandrel 1 and mandrel termination 2 by controlling feed system gos deep into recipient 3 gradually, and start backward extrusion, metal ingot 4 circular arc inner concave under the effect of backward extrusion pressure deforms, and flattens gradually;
As shown in Figure 3, at the bottom of last metal ingot 4 to be matched with the circular arc inner groovy of baffle plate 5 be shaped tin by the outer convex surface of the circular arc of mandrel termination 2 under the effect of backward extrusion pressure.
The present invention by the geomery of concaved circular cambered surface in concaved circular cambered surface in the outer convex arc surface in change mandrel termination 2, baffle plate 5 and blank 4, can realize different amount of plastic deformation bottom cylindrical member.
Compared with cylindrical member backward extrusion method general at present, deflection when the method can enlarge markedly backward extrusion at the bottom of cylindrical member cylinder.The plastic deformation of metal is the essential condition ensureing its combination property, and the amount of plastic deformation increased at the bottom of cylinder contributes to the performance increasing position bottom cylinder.
Claims (8)
1. increase a method for deflection at the bottom of metal backward extrusion cylindrical member cylinder, comprise the steps:
(1) outer convex arc surface is processed in the mandrel termination of mould, and baffle plate is processed into interior concaved circular cambered surface;
(2) be fixed on the main piston of extruder by mandrel, mandrel termination is fixed on mandrel, and mandrel and core shaft end's head group are closed and formed punch; Recipient is fixed on extruder moving beam, and baffle plate is fixed on the forebay of extruder, and recipient and baffle combination form die;
(3) metal stock is put into recipient, carry out backward extrusion; In the blank deformation starting stage, there is plastic deformation near the concave shaped arc surface of baffle plate in blank, concave shaped arc surface flattens gradually under the direct effect of mandrel termination; When continuing distortion, bottom blank, start the circular arc inner groovy entering baffle plate, formed and have at the bottom of the cylinder of spirogyrate arc surface.
2. the method for deflection at the bottom of increase metal backward extrusion cylindrical member cylinder according to claim 1, it is characterized in that: the side machining of described blank goes out interior concaved circular cambered surface, and when putting into recipient, blank has the side of concaved circular cambered surface near baffle plate.
3. the method for deflection at the bottom of increase metal backward extrusion cylindrical member cylinder according to claim 1, is characterized in that: coordinate between the outer convex arc surface of described mandrel termination and the interior concaved circular cambered surface of baffle plate at the bottom of being shaped tin.
4. the method for deflection at the bottom of increase metal backward extrusion cylindrical member cylinder according to claim 1, is characterized in that: described mandrel termination is threaded connection and is fixed on mandrel.
5. the method for deflection at the bottom of increase metal backward extrusion cylindrical member cylinder according to claim 1, is characterized in that: described recipient contacts with baffle-panels.
6. the method for deflection at the bottom of increase metal backward extrusion cylindrical member cylinder according to claim 1, is characterized in that: described backward extrusion comprises mould and die preheating, blank preheating and pressing steps.
7. the method for deflection at the bottom of increase metal backward extrusion cylindrical member cylinder according to claim 6, is characterized in that: described mould and die preheating comprises recipient preheating, baffle plate preheating, mandrel and the preheating of mandrel termination.
8. the method for deflection at the bottom of increase metal backward extrusion cylindrical member cylinder according to claim 1, it is characterized in that: by the geomery of concaved circular cambered surface in concaved circular cambered surface in change mandrel termination evagination arc surface, baffle plate and blank, different amount of plastic deformation can be realized bottom cylindrical member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410299423.8A CN105312349B (en) | 2014-06-26 | 2014-06-26 | Method of increasing deformation quantity of cylinder bottom of metal backward-extrusion cylindrical part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410299423.8A CN105312349B (en) | 2014-06-26 | 2014-06-26 | Method of increasing deformation quantity of cylinder bottom of metal backward-extrusion cylindrical part |
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| CN105312349A true CN105312349A (en) | 2016-02-10 |
| CN105312349B CN105312349B (en) | 2017-04-19 |
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| CN201410299423.8A Active CN105312349B (en) | 2014-06-26 | 2014-06-26 | Method of increasing deformation quantity of cylinder bottom of metal backward-extrusion cylindrical part |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107790545A (en) * | 2017-09-30 | 2018-03-13 | 重庆长安工业(集团)有限责任公司 | A kind of deep extrusion prevents the loose method of bottom hole |
| CN108838229A (en) * | 2018-07-11 | 2018-11-20 | 上海核工程研究设计院有限公司 | A kind of main pipe hot leg integrated extrusion molding device |
| CN113226582A (en) * | 2018-11-15 | 2021-08-06 | 美国密歇根州立大学董事会 | Extruding metal material using extrusion pad having curved surface |
| CN114472573A (en) * | 2022-02-23 | 2022-05-13 | 江苏启力锻压机床有限公司 | Extrusion forming method for automobile air suspension piston cylinder |
| CN115106396A (en) * | 2022-07-20 | 2022-09-27 | 陕西长羽航空装备股份有限公司 | Blank making device of titanium alloy deep cylinder and extrusion-rolling forming method using same |
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| SU1750808A1 (en) * | 1990-07-31 | 1992-07-30 | Ижевский механический институт | Method of making hollow articles with thick bottom |
| CN2189991Y (en) * | 1993-02-01 | 1995-02-22 | 上海高压容器厂 | Sylinder extruding mould |
| DE19852537C2 (en) * | 1998-11-05 | 2003-01-09 | Mannesmann Ag | Extrusion process for the production of a seamless hollow body with a bottom or a seamless tube |
| CN1883848A (en) * | 2006-07-11 | 2006-12-27 | 张华文 | Production process for preparing finish forged blank of axial-shifting through-hole type universal joint housing and dedicated die therefor |
| CN101972792A (en) * | 2010-10-22 | 2011-02-16 | 南京迪威尔重型锻造股份有限公司 | Hot reverse-extrusion forming mold for large cup shell |
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2014
- 2014-06-26 CN CN201410299423.8A patent/CN105312349B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1750808A1 (en) * | 1990-07-31 | 1992-07-30 | Ижевский механический институт | Method of making hollow articles with thick bottom |
| CN2189991Y (en) * | 1993-02-01 | 1995-02-22 | 上海高压容器厂 | Sylinder extruding mould |
| DE19852537C2 (en) * | 1998-11-05 | 2003-01-09 | Mannesmann Ag | Extrusion process for the production of a seamless hollow body with a bottom or a seamless tube |
| CN1883848A (en) * | 2006-07-11 | 2006-12-27 | 张华文 | Production process for preparing finish forged blank of axial-shifting through-hole type universal joint housing and dedicated die therefor |
| CN101972792A (en) * | 2010-10-22 | 2011-02-16 | 南京迪威尔重型锻造股份有限公司 | Hot reverse-extrusion forming mold for large cup shell |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107790545A (en) * | 2017-09-30 | 2018-03-13 | 重庆长安工业(集团)有限责任公司 | A kind of deep extrusion prevents the loose method of bottom hole |
| CN108838229A (en) * | 2018-07-11 | 2018-11-20 | 上海核工程研究设计院有限公司 | A kind of main pipe hot leg integrated extrusion molding device |
| CN113226582A (en) * | 2018-11-15 | 2021-08-06 | 美国密歇根州立大学董事会 | Extruding metal material using extrusion pad having curved surface |
| CN114472573A (en) * | 2022-02-23 | 2022-05-13 | 江苏启力锻压机床有限公司 | Extrusion forming method for automobile air suspension piston cylinder |
| CN114472573B (en) * | 2022-02-23 | 2022-12-30 | 江苏启力锻压机床有限公司 | Extrusion forming method for automobile air suspension piston cylinder |
| CN115106396A (en) * | 2022-07-20 | 2022-09-27 | 陕西长羽航空装备股份有限公司 | Blank making device of titanium alloy deep cylinder and extrusion-rolling forming method using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105312349B (en) | 2017-04-19 |
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Effective date of registration: 20190624 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Research Institute of engineering and Technology Co., Ltd. Address before: No. 2, Xinjie street, Xicheng District, Beijing, Beijing Patentee before: General Research Institute for Nonferrous Metals |