CN105312349B - 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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- CN105312349B CN105312349B CN201410299423.8A CN201410299423A CN105312349B CN 105312349 B CN105312349 B CN 105312349B CN 201410299423 A CN201410299423 A CN 201410299423A CN 105312349 B CN105312349 B CN 105312349B
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- cylinder bottom
- mandrel
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- backward extrusion
- baffle plate
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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 of increase metal backward extrusion cylindrical member cylinder bottom deflection, belongs to metallic extrusion molding neck
Domain.
Background technology
At present, during metal cylindrical member backward extrusion, for regular cylindrical, mould is planar base surface to the blank for generally adopting.
When backward extrusion deforms there is larger stretching class deformation in bowl wall portion, and cylinder bottom point deflection it is relative for barrel it is obvious not
Foot.The plastic deformation of metal is improving product intensity and the essential condition of other combination properties.Therefore cylinder bottom point is become by plasticity
The performance boost effect that shape is brought is weaker than bowl wall portion, causes the overall performance of finished product not high.Therefore, it is necessary to propose a kind of new
Technical scheme solving the above problems.
The content of the invention
It is an object of the invention to provide a kind of method of increase metal backward extrusion cylindrical member cylinder bottom deflection, it can show
Write the cylinder bottom deflection of the metal cylindrical member of increase backward extrusion.
To achieve these goals, the present invention takes following technical scheme：
A kind of method of increase metal backward extrusion cylindrical member cylinder bottom deflection, comprises the steps：
(1) outer convex arc surface is processed into in the mandrel termination of mould, and baffle plate is processed into into interior concaved circular cambered surface；
(2) mandrel is fixed on the main piston of extruder, mandrel termination is fixed on mandrel, mandrel and mandrel termination group
Close and constitute punch；Recipient is fixed on extruder moving beam, and baffle plate is fixed on the forebay of extruder, recipient and gear
Plate combination constitutes die；
(3) metal stock is put in recipient, carries out backward extrusion；In the blank deformation starting stage, blank is near baffle plate
Concave shaped arc surface there is plastic deformation under the direct effect of mandrel termination, concave shaped arc surface is gradually flattened；Continue to become
During shape, blank bottom initially enters the groove in the interior concaved circular cambered surface of baffle plate, forms the cylinder bottom with spirogyrate arc surface.
The side of described blank is machined into concave shaped arc surface, and there is blank concave shaped to justify when being put into recipient
The side of cambered surface is near baffle plate.
With certain matching relationship between the outer convex arc surface of described mandrel termination and the interior concaved circular cambered surface of baffle plate, two
Person's cooperation shapes a bottom.
Described mandrel termination is threaded connection and is fixed on mandrel；Described recipient and baffle-panels is contacted.
Described backward extrusion includes mould preheating, blank preheating and pressing steps；Described mould preheating includes extruding
Cylinder preheating, baffle plate preheating, mandrel and mandrel termination preheat.
By the shape chi for changing concaved circular cambered surface and blank concave shaped arc surface in mandrel termination evagination arc surface, baffle plate
It is very little, different amount of plastic deformation can be realized in cylindrical member bottom.
Baffle plate is processed into interior concaved circular cambered surface by the present invention by the way that the mandrel termination of mould is processed into into outer convex arc surface, this
Two arc surfaces have certain matching relationship, while the bottom surface that metal stock presses close to baffle plate side is machined into into specific dimensions
Concave shaped arc surface, the deflection at cylindrical member cylinder bottom when can significantly increase backward extrusion.
Compared with cylindrical member backward extrusion method general at present, cylindrical member cylinder bottom when the method can significantly increase backward extrusion
Deflection.The plastic deformation of metal is the essential condition for ensureing its combination property, increases the amount of plastic deformation at cylinder bottom and contributes to
The mechanical property at increase cylinder bottom position.
Description of the drawings
Fig. 1 is that the inventive method is starting the schematic diagram before backward extrusion.
Fig. 2 is the schematic diagram that backward extrusion deforms the starting stage.
Fig. 3 is the schematic diagram in the end of a period stage of backward extrusion deformation.
Main Reference Numerals：
The mandrel termination of 1 mandrel 2
The blank of 3 recipient 4
5 baffle plates
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further described.
The method of the increase metal backward extrusion cylindrical member cylinder bottom deflection of the present invention, the process units of employing include mandrel 1,
Mandrel termination 2, recipient 3, baffle plate 5, comprise the steps：
(1) outer convex arc surface is processed into in the mandrel termination 2 of mould, and baffle plate 5 is processed into into interior concaved circular cambered surface, this two
Individual arc surface has certain matching relationship, and both shape a bottom at cooperation；Simultaneously metal stock 4 is pressed close to into a bottom surface for bottom side
It is machined into the concave shaped arc surface of certain size.
(2) mandrel 1 is fixed on the main piston of extruder, mandrel termination 2 is fixed on mandrel 1 with being threadedly coupled, core
Axle 1 and the combination of mandrel termination 2 constitute punch；Recipient 3 is fixed on extruder moving beam, and baffle plate 5 is fixed on extruder
On forebay, recipient 3 and the face of baffle plate 5 contact, and recipient 3 and the combination of baffle plate 5 constitute die.Between recipient 3 and baffle plate 5
Active force, is controlled by the active force between crossbeam and forebay.
(3) metal stock 4 is put in recipient 3, blank 4 has the side of concave shaped arc surface near baffle plate 5, carries out
Backward extrusion；Blank 4 deform the starting stage, blank 4 near baffle plate 5 concave shaped arc surface mandrel termination 2 direct effect
Lower generation plastic deformation, concave shaped arc surface is gradually flattened；When continuing to deform, the bottom of blank 4 initially enters the indent circle of baffle plate 5
Groove in cambered surface, forms the cylinder bottom with spirogyrate arc surface.
In said method, described backward extrusion includes mould and blank preheating and pressing steps, and mould preheating includes squeezing
Pressure cylinder 3 is preheated, and baffle plate 5 is preheated, and mandrel 1 and mandrel termination 2 preheat.
The backward extrusion step is as follows：
As shown in figure 1, preheated metal ingot 4 is loaded in recipient 3 first, the circular arc inner concave court of blank 4
To the direction of baffle plate 5；
As shown in Fig. 2 recipient 3 is gradually goed deep in the front end that mandrel 1 and mandrel termination 2 are controlled by controlling feed system,
Start backward extrusion, the circular arc inner concave in the presence of backward extrusion pressure of metal ingot 4 deforms, gradually flattens；
As shown in figure 3, last metal ingot 4 passes through the circular arc arcuate surface of mandrel termination 2 in the presence of backward extrusion pressure
A bottom is shaped with the fit depressions in the interior concaved circular cambered surface of baffle plate 5.
The present invention can be by changing concaved circular cambered surface and the concave shaped of blank 4 in the outer convex arc surface in mandrel termination 2, baffle plate 5
The geomery of arc surface, can realize different amount of plastic deformation in cylindrical member bottom.
Compared with cylindrical member backward extrusion method general at present, cylindrical member cylinder bottom when the method can significantly increase backward extrusion
Deflection.The plastic deformation of metal is the essential condition for ensureing its combination property, increases the amount of plastic deformation at cylinder bottom and contributes to
The performance at increase cylinder bottom position.
Claims (8)
1. a kind of method of increase metal backward extrusion cylindrical member cylinder bottom deflection, comprises the steps：
(1) outer convex arc surface is processed into in the mandrel termination of mould, and baffle plate is processed into into interior concaved circular cambered surface；
(2) mandrel is fixed on the main piston of extruder, mandrel termination is fixed on mandrel, structure is combined in mandrel and mandrel termination
Into punch；Recipient is fixed on extruder moving beam, and baffle plate is fixed on the forebay of extruder, recipient and baffle group
Close and constitute die；
(3) metal stock is put in recipient, carries out backward extrusion；In the blank deformation starting stage, blank is in baffle plate
There is plastic deformation in concave circular arcs face, concave shaped arc surface is gradually flattened under the direct effect of mandrel termination；When continuing to deform,
Blank bottom initially enters the groove in the interior concaved circular cambered surface of baffle plate, forms the cylinder bottom with spirogyrate arc surface.
2. the method for increase metal backward extrusion cylindrical member cylinder bottom according to claim 1 deflection, it is characterised in that：It is described
The side of blank be machined into concave shaped arc surface, and the side that blank has concave shaped arc surface when being put into recipient is leaned on
Nearly baffle plate.
3. the method for increase metal backward extrusion cylindrical member cylinder bottom according to claim 1 deflection, it is characterised in that：It is described
The outer convex arc surface of mandrel termination and the interior concaved circular cambered surface of baffle plate between coordinate shape a bottom.
4. the method for increase metal backward extrusion cylindrical member cylinder bottom according to claim 1 deflection, it is characterised in that：It is described
Mandrel termination be threaded connection and be fixed on mandrel.
5. the method for increase metal backward extrusion cylindrical member cylinder bottom according to claim 1 deflection, it is characterised in that：It is described
Recipient and baffle-panels contact.
6. the method for increase metal backward extrusion cylindrical member cylinder bottom according to claim 1 deflection, it is characterised in that：It is described
Backward extrusion include mould preheating, blank preheating and pressing steps.
7. the method for increase metal backward extrusion cylindrical member cylinder bottom according to claim 6 deflection, it is characterised in that：It is described
Mould preheating include that recipient is preheated, baffle plate preheating, mandrel and mandrel termination preheat.
8. the method for increase metal backward extrusion cylindrical member cylinder bottom according to claim 1 deflection, it is characterised in that：Pass through
Change the geomery of concaved circular cambered surface and blank concave shaped arc surface in mandrel termination evagination arc surface, baffle plate, can be in cylinder
Realize different amount of plastic deformation in shape part bottom.
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN105312349A CN105312349A (en) | 2016-02-10 |
| CN105312349B true CN105312349B (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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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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| 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 |
| EP4093560A4 (en) * | 2018-11-15 | 2023-05-10 | The Regents Of The University Of Michigan | Extrusion of metal material using a dummy block having a curved surface |
| 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 |
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 |
-
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 |
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|---|---|
| CN105312349A (en) | 2016-02-10 |
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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 |
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