CN108311550A - A kind of flat extruding cylinder reducing inner cylinder stress - Google Patents
A kind of flat extruding cylinder reducing inner cylinder stress Download PDFInfo
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- CN108311550A CN108311550A CN201810442729.2A CN201810442729A CN108311550A CN 108311550 A CN108311550 A CN 108311550A CN 201810442729 A CN201810442729 A CN 201810442729A CN 108311550 A CN108311550 A CN 108311550A
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- cylinder
- inner cylinder
- stress
- flat extruding
- flat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C27/00—Containers for metal to be extruded
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A kind of flat extruding cylinder reducing inner cylinder stress.The flat extruding cylinder is made of outer barrel (501), middle cylinder (502), inner cylinder (503) and soft metal filled layer (504)；It is all made of elastic conjunction between outer barrel (501) and middle cylinder (502), middle cylinder (502) and inner cylinder (503)；Two pieces of soft metal filled layers (504) are symmetrical with flat hole long axis distribution both sides, inside inner cylinder cavity, and it is closed at both ends.By above-mentioned design, flat extruding cylinder provided by the invention can make the stress concentration phenomenon at knuckle be improved significantly, stress level significantly reduce, squeeze be on active service when pulsating stress amplitude significantly reduce, effectively improve the service life of entire flat extruding cylinder.
Description
Technical field
Present invention relates to extrusion forming field, more particularly to a kind of flat extruding cylinder reducing inner cylinder stress.
Background technology
With the rapid development of transportation and space flight and aviation industry, large-scale wide cut, thin-walled and light with labyrinth
Demand of the alloy profile in fields such as rail vehicle, aircrafts constantly increases.Wide cut structure can not only be promoted using flat fashion of extrusion
Part extrusion process and product quality decrease the tonnage of extruder.Therefore, many researchers propose the flat extruding of different structure
Cylinder.
If Fig. 1 be in the prior art inner cylinder be integrally-built flat extruding cylinder schematic diagram, it by outer barrel 101, middle cylinder 102,
Inner cylinder 103 forms.In work, at inner cylinder inner wall arc transition, i.e., position is irised out in figure, will produce prodigious stress concentration,
And the pulsating stress amplitude when squeezing work is very big, easily inner cylinder is caused to destroy, substantially reduces service life.
If Fig. 2 is the flat extruding cylinder with local pre-press structure that patent ZL01256641.1 is proposed, it is by outer barrel 201, middle cylinder
202, inner cylinder 203 forms.It is characterized in that the elastic conjunction contact surface between inner cylinder and middle cylinder is localized contact, to reduce circular arc
Transition position irises out the stress concentration at position in figure；But some is not contacted inner cylinder with middle cylinder, causes the position Stiffness Drop
Low, when work, will produce larger displacement, under periodic loading environment, it is easy to cause fatigue rupture, reduce and use the longevity
Life.
If Fig. 3 is the flat extruding cylinder that the inner cylinder that patent WO2010/145087A1 is proposed is insert structure, it by outer barrel 301,
Middle cylinder 302, inner cylinder 303, upper insert 304, lower insert 305 and dormant bolt 306 form.Upper and lower insert is consolidated by dormant bolt
It is scheduled on inner cylinder annulus, concentration internal stress is relatively evenly passed to inner cylinder annulus, to reduce the peak stress of critical section；
But due to the harsh environments of mismachining tolerance and high temperature, high pressure, high friction etc., meeting between two inserts and inner tube wall when work
Gap is generated, gap can be filled up by being extruded metal stock, damage insert and middle cylinder, while also will produce stress collection at inner cylinder screw thread
In, under periodic load condition, also it is easier to damage.
Such as the flat extruding cylinder that Fig. 4 is a kind of end part seal soft metal layer that patent ZL103934299 is proposed, it is by outer barrel
401, middle cylinder 402, soft metal layer 403 and inner cylinder 404 are constituted.Wherein, outer barrel 401 and middle cylinder 402 use elastic conjunction；In inner cylinder
The soft metal layer 403 of one layer of Varying-thickness is contained between 404 and middle cylinder 402；Both ends use interference fit by 403 envelope of soft metal layer
It closes in closed cavity.The flat extruding cylinder that the invention provides is had good under high temperature environment using the soft metal layer of variable cross-section
Good mobility, when inner cylinder bears extrusion load, inner cylinder deformation causes soft metal layer to generate hydrostatic pressure, due to hydrostatic pressure
It is obviously eliminated with the stress concentration of Inner extrusion dynamic balance, extrusion cylinder inner cylinder, stress level is greatly reduced；And middle cylinder
402, outer barrel 401 will not generate stress concentration under the action of hydrostatic pressure.However in extrusion process, that is, semi-load,
Inner cylinder stress is excessive, and deformation is more serious, is easier to damage.
Above-mentioned flat extruding cylinder structure all unavoidably generates stress concentration at knuckle, and stress level is too high；
Under high temperature and pressure Service Environment, inner cylinder mean stress level is already close to yield stress, due to the influence of stress concentration, part
Stress is very high, easily exceeds allowable stress, and under the operating mode that actual production periodically loads, pulsating stress amplitude is very big, leads
It causes the fatigue life of inner cylinder to significantly reduce, cracks in a short time.Currently, the service life of above-mentioned flat extruding cylinder is difficult to meet work
Industry demand.
Invention content
The purpose of patent of the present invention is exactly to overcome the stress concentration with stress amplitude of flat extruding cylinder in above-mentioned background prodigious existing
As proposing a kind of flat extruding cylinder can significantly reduce inner cylinder stress concentration and reduce pulsating stress amplitude, improving flat extruding cylinder
Service life.
This invention is a kind of flat extruding cylinder and manufacturer for reducing inner cylinder stress concentration and reducing pulsating stress amplitude
Method.Flat extruding cylinder structure proposed by the invention is as shown in Figure 5.The flat extruding cylinder is by outer barrel 501, middle cylinder 502,503 and of inner cylinder
Soft metal filled layer 504 is constituted；Outer barrel 501 and middle cylinder 502 use elastic conjunction；Middle cylinder 502 and inner cylinder 503 are filled using interference
Match；Two pieces of soft metal filled layers 504 are inlayed inside inner cylinder 503；By the closed at both ends in inner cylinder of two pieces of soft metal filled layers 504
In cavity inside 503, as shown in Figure 6.
Compared with prior art, the present invention has the following advantages：
Flat extruding cylinder provided by the invention inlays the structure of soft metal layer using inner cylinder, when inner cylinder bears extrusion load,
The deflection of soft metal filling region same area compared with the existing technology slightly increases, and then improves the stress distribution feelings of inner cylinder
Condition, the stress concentration at inner cylinder inner wall arc transition significantly reduce；And middle cylinder 502, outer barrel 501 will not generate stress concentration；
For the practical alternating load for squeezing operating mode, the pulsating stress amplitude at inner cylinder inner wall arc transition is significantly reduced.Therefore, originally
The flat extruding cylinder that invention provides can effectively improve the entire flat extruding cylinder service life.
Description of the drawings
Fig. 1 is that inner cylinder is integrally-built flat extruding cylinder schematic diagram in the prior art
Wherein：Cylinder, 103 inner cylinders in 101 outer barrels, 102
Fig. 2 is flat extruding cylinder with local pre-press structure schematic diagram in the prior art
Wherein：Cylinder, 203 inner cylinders in 201 outer barrels, 202
Fig. 3 is the flat extruding cylinder schematic diagram that inner cylinder is insert structure in the prior art
Wherein：Insert, 305 times inserts, 306 attachment screws on 304
Fig. 4 is the flat extruding cylinder embodiment schematic diagram of end part seal soft metal layer in the prior art
Wherein：Outer barrel 401, middle cylinder 402, soft metal layer 403, inner cylinder 404
Fig. 5 is the flat extruding cylinder embodiment schematic diagram of the present invention
Wherein：Cylinder, 503 inner cylinders, 504 soft metal filled layers in 501 outer barrels, 502
Fig. 6 is 1/4 model schematic of flat extruding cylinder of the present invention
Wherein：Cylinder, 503 inner cylinders, 504 soft metal filled layers in 501 outer barrels, 502
Fig. 7, Fig. 8, Fig. 9 are that the flat extruding cylinder of the present invention and tradition flat extruding cylinder and patent ZL103934299 schemes are answered
Power compares
Specific implementation mode
To enable the above objects, features and advantages of the present invention to become apparent from expression, below in conjunction with the accompanying drawings to the present invention's
Specific implementation mode elaborates.Flat extruding cylinder embodiment schematic diagram proposed by the invention is as shown in Figure 5 and Figure 6.By outer
Cylinder 501, middle cylinder 502, inner cylinder 503, soft metal filled layer 504 are constituted；Outer barrel 501 and middle cylinder 502 use elastic conjunction；Middle cylinder
502 and inner cylinder 503 use elastic conjunction；Two pieces of soft metal filled layers 504 are inlayed in 503 internal cavity of inner cylinder；By two blocks of soft gold
Belong to the closed at both ends in 503 internal cavity of inner cylinder of filled layer 504, as shown in Figure 6.
The flat extruding cylinder military service of the present invention is dropped in hot environment, the under high temperature environment yield stress of soft metal filled layer
Low, inner cylinder 503 obtains reduction appropriate in the rigidity of the partial structurtes of soft metal filling region, and then improves the stress point of inner cylinder
Cloth situation；Scientific and reasonable design inner cylinder 503 inner cavity configuration, the parameter of soft metal filled layer 504 and internal cavity and each
Interference volume between layer cylinder, can make stress concentration phenomenon at knuckle be improved significantly, stress level significantly reduces, and squeezes
Pulsating stress amplitude when military service significantly reduces, therefore the present invention can greatly improve the service life of flat extruding cylinder.
It should be further noted that the flat extruding cylinder that present example provides is not limited to specific size and each layer
The geometric parameter of cylinder and soft metal filled layer, the material physical chemistry characteristic of unlimited fixture body soft metal filled layer can basis
Theoretical research and needs of production are changed size and each layer metal material；In addition, both ends seal form can also
Using different structure.
The above is only one embodiment of the present of invention, is imposed any restrictions to the present invention.It is any to be familiar with sheet
The technical staff in field according to above-mentioned principle can modify to the present invention, modify or structure change generates equivalent reality
Example；Therefore, any flat extruding cylinder without departing from principle of the present invention and technical solution, belongs to the scope of the present invention
Within.
Claims (2)
1. it is a kind of reduce inner cylinder stress flat extruding cylinder, the flat extruding cylinder by outer barrel (501), middle cylinder (502), inner cylinder (503) and
Soft metal filled layer (504) is constituted；In shape, structure and fit on, with essential features that are existing or being shared close to technology
It is：Elastic conjunction is used between outer barrel (501) and middle cylinder (502), and elastic conjunction is used between middle cylinder (502) and inner cylinder (503)；
Being different from the technical characteristic of the immediate prior art is：Two pieces of soft metals are embedded in the internal cavity of inner cylinder (503) to fill
Layer (504).
2. a kind of flat extruding cylinder reducing inner cylinder stress according to claim 1, it is characterized in that：Two pieces of soft metal filled layers
(504) it is symmetrical with flat hole long axis and is embedded in inner cylinder cavity both sides, and is closed at both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810442729.2A CN108311550A (en) | 2018-05-10 | 2018-05-10 | A kind of flat extruding cylinder reducing inner cylinder stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810442729.2A CN108311550A (en) | 2018-05-10 | 2018-05-10 | A kind of flat extruding cylinder reducing inner cylinder stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108311550A true CN108311550A (en) | 2018-07-24 |
Family
ID=62896082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810442729.2A Pending CN108311550A (en) | 2018-05-10 | 2018-05-10 | A kind of flat extruding cylinder reducing inner cylinder stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108311550A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3011134A1 (en) * | 1980-03-22 | 1981-10-01 | Schloemann-Siemag AG, 4000 Düsseldorf | Indirect metal extrusion press - where moving traverse contg. billet holder barrel also carries radial shear knife for removing billet residue |
| CN102274868A (en) * | 2010-06-10 | 2011-12-14 | 苏州昆仑先进制造技术装备有限公司 | Separating barrel and damping extruding method and device for pipes |
| CN103934299A (en) * | 2014-05-05 | 2014-07-23 | 重庆大学 | Flat squeezing barrel for eliminating concentrated stress of inner barrel and manufacturing method for flat squeezing barrel |
| CN205966829U (en) * | 2016-08-11 | 2017-02-22 | 西安工程大学 | Flat recipient of an inside component of stress can release |
-
2018
- 2018-05-10 CN CN201810442729.2A patent/CN108311550A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3011134A1 (en) * | 1980-03-22 | 1981-10-01 | Schloemann-Siemag AG, 4000 Düsseldorf | Indirect metal extrusion press - where moving traverse contg. billet holder barrel also carries radial shear knife for removing billet residue |
| CN102274868A (en) * | 2010-06-10 | 2011-12-14 | 苏州昆仑先进制造技术装备有限公司 | Separating barrel and damping extruding method and device for pipes |
| CN103934299A (en) * | 2014-05-05 | 2014-07-23 | 重庆大学 | Flat squeezing barrel for eliminating concentrated stress of inner barrel and manufacturing method for flat squeezing barrel |
| CN205966829U (en) * | 2016-08-11 | 2017-02-22 | 西安工程大学 | Flat recipient of an inside component of stress can release |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180724 |
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| WD01 | Invention patent application deemed withdrawn after publication |