CN106556679B - A kind of tubing reducing formation experimental rig and pipe end is fixed and discharge method - Google Patents
A kind of tubing reducing formation experimental rig and pipe end is fixed and discharge method Download PDFInfo
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- CN106556679B CN106556679B CN201611032001.XA CN201611032001A CN106556679B CN 106556679 B CN106556679 B CN 106556679B CN 201611032001 A CN201611032001 A CN 201611032001A CN 106556679 B CN106556679 B CN 106556679B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The present invention discloses a kind of tubing reducing formation experimental rig and pipe end is fixed and discharge method, the device includes the barrel of both ends open, the first open end of barrel is sealedly connected with pedestal, the second open end of barrel is fixedly installed with pressing plate, it further include that one end is located in barrel, and the pressure head being flexibly connected with material tube inner wall, the pressure head other end are open across pressing plate, outside barrel, and it is provided with the outer rim being cooperatively connected with press.Pipe end is fixed and discharge method mainly includes, and tubing both ends is cut along axial as multiple small pieces, cut-away portions are located to tubing inner bending is extremely vertical with tubing bus；Tubing cut-away portions are compressed by the briquetting outside the core model and tubing in tubing；The tubing in barrel is taken out after the completion of undergauge experiment, and the tubing fixed is cut along core model groove, mold processing cost of the invention is low, simple reliable without special seal device, operation, and pipe end fixation, discharging is quick, convenient after experiment.
Description
Technical field
The present invention relates to tubing reducing formation experimental technique fields, more particularly to a kind of tubing reducing formation experimental rig
It is fixed with pipe end and discharge method.
Background technique
With part forming technology rapid development with it is increasingly mature, current all kinds of hi-tech industries tend to using
Lightweight, high-intensitive thin-wall hollow member, and the corrugation faced when thin-walled hollow parts forming and rupture destabilization problems, are mesh
The a great problem of preceding puzzlement domestic and foreign scholars.When carrying out reducing formation process test research to tubing, pipe end is fixed
Constraint or offer prestressing force are one of the main points that tubing reducing formation mold needs to realize.
Current existing solution is for example:
①Gao iron army, Wang Zhongjin, Deng, which builds, to be understood.Skill is forged and pressed in the influence of necking length on viscous medium outer pressure necking forming
Art, 2007,32 (5): 23-26
②Gao iron army, Wang Zhongjin.Influence of the cylinder base diameter to viscous medium external pressure reducing formation, mould industry, 2009,35
(6): 35-37
In above-mentioned two papers in viscous medium forming test use the preformed method of external mold, first to tubing into
The pre- bulging of row, is embedded in its upper and lower end parts in external mold, to realize that pipe end is fixed, in discharging, only need to be by external mold dismounting
It can.
However the external mold that this pipe end fixed form needs special processing to match with tube outer diameter, and pipe deforms segment length
Degree immobilizes, while more demanding to the sealing performance of mold, and mold processing cost greatly improves, and is not suitable for small lot, more
The formability test of specification pipe.
Summary of the invention
The object of the present invention is to provide a kind of tubing reducing formation experimental rig and pipe end is fixed and discharge method, with
The above-mentioned problems of the prior art is solved, mold processing cost is reduced, is simple reliable without special seal device, operation.
To achieve the above object, the present invention provides the following technical scheme that
The present invention provides a kind of tubing reducing formation engineer testing device, the barrel including both ends open, the barrel
One open end is sealedly connected with pedestal, and second open end of barrel is fixedly installed with pressing plate；It further include pressure head, the pressure head one
End is located in the barrel, and is flexibly connected with the material tube inner wall, and the other end is located at outside the barrel, and is provided with and pressure
The outer rim that equipment is cooperatively connected.
Optionally, the pedestal and the pressing plate pass through bolt respectively and are fixedly connected with the barrel.
It optionally, further include core model that briquetting and both ends side wall offer annular groove, the core model is radially divided into two
Block.
The present invention also provides a kind of tubing reducing formation technique examinations using aforementioned tubes reducing formation engineer testing device
It tests pipe end to fix and discharge method, the method steps are as follows:
Step 1 first places the core model in tubing to be processed；Tubing both ends are cut into small pieces, cutting section along axial direction
Divide and locates to tubing inner bending to vertical with the tubing bus；
Step 2, the core model are bolted with the briquetting；Outside by the core model and tubing in tubing
The briquetting compresses tubing cut-away portions；
The tubing fixed is placed in the barrel by step 3, the briquetting at tubing both ends respectively with the pedestal and institute
Pressing plate is stated to be fixedly connected；Carry out undergauge experiment；
Step 4 takes out the tubing fixed in the barrel after the completion of undergauge experiment, and the tubing edge that will be fixed
Core model groove is cut, and tubing fixed part is separated with diameter shrinkage part.
Optionally, in step 2, core model one end in the tubing is provided with preload block, the preload block and the pressure
Pre-loading screw is connected between block；Axial pre tightening force is applied to tubing cut-away portions by pre-loading screw.
Above-mentioned technical proposal disclosed by the invention achieves following technical effect compared with prior art:
Tubing reducing formation experimental rig and pipe end disclosed by the invention are fixed and discharge method combines solid
Granule medium forming technology, the not harsh requirement of the sealing for medium, also without the length of restriction pipe deformation section, by more
Reducing formation test under the conditions of different distortion length can be realized in the forming core model for changing different length, greatly reduces mold system
It makes and the cost of related accessory, is particularly suitable for small lot, the reducing formation engineer testing of plurality of specifications pipe.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings；
Fig. 1 fixes for tubing of the present invention end and discharging structure schematic diagram；
Fig. 2 is tubing of the present invention reducing formation experimental provision scheme of erection；
Description of symbols: 1 is barrel, and 2 be pedestal, and 3 be pressing plate, and 4 be pressure head, and 5 be outer rim, and 6 be briquetting, and 7 be annular
Groove, 8 be core model, and 9 is pre-tighten block, and 10 be pre-loading screw, and 11 be sealing element, and 12 be solid particle medium, and 13 be tubing.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of tubing reducing formation experimental rig, to solve above-mentioned of the existing technology ask
Topic reduces mold processing cost, is simple reliable without special seal device, operation.
The present invention provides a kind of tubing reducing formation engineer testing device, the barrel including both ends open, the barrel
One open end is sealedly connected with pedestal, and second open end of barrel is fixedly installed with pressing plate；It further include pressure head, the pressure head one
End is located in the barrel, and is flexibly connected with the material tube inner wall, and the other end is located at outside the barrel, and is provided with and pressure
The outer rim that equipment is cooperatively connected.
It fixes the present invention also provides a kind of tubing reducing formation engineer testing pipe end and discharge method, including walks as follows
It is rapid:
Step 1 first places the core model in tubing to be processed；By tubing both ends along axial incision, cut-away portions are to pipe
Material inner bending is located to vertical with the tubing bus；
Step 2, the core model are bolted with the briquetting；Outside by the core model and tubing in tubing
The briquetting compresses tubing cut-away portions；
The tubing fixed is placed in the barrel by step 3, the briquetting at tubing both ends respectively with the pedestal and institute
Pressing plate is stated to be fixedly connected；Carry out undergauge experiment；
Step 4 takes out the tubing fixed in the barrel after the completion of undergauge experiment, and the tubing edge that will be fixed
Core model groove is cut, and tubing fixed part is separated with diameter shrinkage part.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
The present invention provides a kind of tubing reducing formation engineer testing device, as depicted in figs. 1 and 2, including both ends open
Barrel 1,1 first open end of barrel are connected with pedestal 2 by bolt seal, and 1 second open end of barrel passes through bolt
It is fixedly installed with pressing plate 3；It further include pressure head 4, described 4 one end of pressure head is located in the barrel 1, and living with 1 inner wall of barrel
Dynamic connection, the other end are located at outside the barrel 1, and are provided with the outer rim 5 being cooperatively connected with press device, the pressure head 4 and institute
It states and is provided with sealing element 11 between 1 second open end of barrel, the sealing element 11 can may be sealing ring for seal washer；
It further, further include core model 8 that briquetting 6 and both ends side wall offer annular groove 7, the core model 8 is radially divided into two pieces.
Reducing formation experimental provision disclosed by the invention when in use, first will be to be packed into core inside reducing formation tubing 13
Mould 8, core model 8 are radially divided into two pieces, to guarantee that core model 8 can smoothly take out from tubing 13 after component shaping；By what is fixed
Tubing 13 is put into the barrel 1 of reducing formation experimental provision, and solid particle medium 12 is packed into barrel 1, by 1 inner wall of barrel
With it is full with the filling of solid particle medium 12 between the tubing 13 that fixes, be put into pressure head 4 from 1 second open end of barrel, barrel 1 the
The pressing plate 3 of two open ends has certain sealing function, prevents solid particle medium 12 from overflowing；Pressure head 4 pushes simultaneously, and compression is solid
Body granule medium 12 makes tubing 13 realize necking deformation, and tubing 13 gradually undergauge and holds together to the patch of core model 8, until tubing 13 and core
Mould 8 shapes after fitting closely to be terminated；4 backhaul of pressure head takes out the tubing 13 after forming from barrel 1.
The present invention also provides a kind of reducing formation engineer testing pipes using aforementioned tubes reducing formation engineer testing device
Material end is fixed and discharge method, and the method steps are as follows:
Step 1 first places the core model 8 in tubing 13 to be processed；By 13 both ends of tubing along axial incision, make tubing
13 both ends are uniformly cut into multiple small pieces, the multiple small pieces being cut into tubing inner bending and successively overlapping to the tubing
13 buses are vertically located；
Step 2, the core model 8 are bolted with the briquetting 6；Outside by the core model 8 and tubing in tubing
The briquetting 6 tubing is bent after cut-away portions compress, and extrude impression, play the role of Complete Bind；The tubing
Interior 8 one end of core model, which is provided with, pre-tightens block 9, is connected with pre-loading screw 10, Ke Yigen between the preload block 9 and the briquetting 6
Needs are factually tested, axial pre tightening force is applied to tubing cut-away portions by adjusting pre-loading screw 10；
The tubing fixed is placed in the barrel 1 by step 3, the briquetting 6 at tubing both ends respectively with the pedestal 2 and
The pressing plate 3 is fixedly connected；Carry out undergauge experiment；
It, first will be to be packed into core model 8 inside reducing formation tubing 13 when carrying out undergauge experiment, core model 8 is radially divided into two
Block, to guarantee that core model 8 can smoothly take out from tubing 13 after component shaping；The tubing 13 fixed is put into reducing formation experiment
In the barrel 1 of device, and it is packed into solid particle medium 12 in barrel 1, will be used between 1 inner wall of barrel and the tubing 13 fixed
The filling of solid particle medium 12 is full, is put into pressure head 4 from 1 second open end of barrel, the pressing plate 3 of 1 second open end of barrel has one
Fixed sealing function prevents solid particle medium 12 from overflowing；Pressure head 4 pushes simultaneously, and compression solid granule medium 12 makes tubing 13
Realize necking deformation, tubing 13 gradually undergauge and holds together to the patch of core model 8, until tubing 13 shapes and terminates after fitting closely with core model 8；
4 backhaul of pressure head takes out the tubing 13 after forming from barrel 1.
The tubing 13 fixed in the barrel 1 is taken out after the completion of undergauge experiment, and is cut using angle grinder etc. by step 4
Tool is cut, the annular groove 7 along core model 8 cuts the diameter shrinkage part of the tubing 13 fixed and fixed part, and tubing 13 is fixed
Part is separated with diameter shrinkage part.
Tubing reducing formation experimental rig and pipe end disclosed by the invention are fixed and discharge method combines solid
Granule medium forming technology, the not harsh requirement of the sealing for medium, also without the length of restriction pipe deformation section, by more
Reducing formation test under the conditions of different distortion length can be realized in the forming core model for changing different length, greatly reduces mold system
It makes and the cost of related accessory, is particularly suitable for small lot, the reducing formation engineer testing of plurality of specifications tubing.Pipe end is solid when experiment
It is fixed solid and reliable, the error of experiment is reduced, experimental data accuracy is higher；After the completion of experiment, a kind of using angle grinder
The diameter shrinkage part of tubing and pipe end fixed part are cut and take out core model i.e. by cutting tool, the groove part reserved along core model
Can, discharging is quick, convenient.
This specification applies that a specific example illustrates the principle and implementation of the invention, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (3)
1. a kind of tubing reducing formation engineer testing device, it is characterised in that: the barrel including both ends open, the barrel first
Open end is sealedly connected with pedestal, and second open end of barrel is fixedly installed with pressing plate；It further include pressure head, described pressure head one end
It is flexibly connected in the barrel, and with the material tube inner wall, the other end is located at outside the barrel, and is provided with and sets with pressure
The standby outer rim being cooperatively connected；The pedestal and the pressing plate pass through bolt respectively and are fixedly connected with the barrel；It further include briquetting
The core model of annular groove is offered with both ends side wall, the core model is radially divided into two pieces；Core model one end in the tubing is set
It is equipped with preload block, is connected with pre-loading screw between the preload block and the briquetting.
2. a kind of tubing reducing formation engineer testing tubing using tubing reducing formation engineer testing device described in claim 1
End is fixed and discharge method, it is characterised in that:
Step 1 first places the core model in tubing to be processed；Tubing both ends are cut into small pieces along axial direction, cut-away portions to
Tubing inner bending is located to vertical with the tubing bus；
Step 2, the core model are bolted with the briquetting；Described in outside the core model and tubing in tubing
Briquetting compresses tubing cut-away portions；
The tubing fixed is placed in the barrel by step 3, the briquetting at tubing both ends respectively with the pedestal and the pressure
Plate is fixedly connected；Carry out undergauge experiment；
Step 4 takes out the tubing fixed in the barrel after the completion of undergauge experiment, and by the tubing fixed along core model
Groove is cut, and tubing fixed part is separated with diameter shrinkage part.
3. tubing reducing formation engineer testing pipe end according to claim 2 is fixed and discharge method, feature exist
In: in step 2, core model one end in the tubing is provided with preload block, is connected between the preload block and the briquetting pre-
Tight screw；Axial pre tightening force is applied to tubing cut-away portions by pre-loading screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032001.XA CN106556679B (en) | 2016-11-22 | 2016-11-22 | A kind of tubing reducing formation experimental rig and pipe end is fixed and discharge method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032001.XA CN106556679B (en) | 2016-11-22 | 2016-11-22 | A kind of tubing reducing formation experimental rig and pipe end is fixed and discharge method |
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| Publication Number | Publication Date |
|---|---|
| CN106556679A CN106556679A (en) | 2017-04-05 |
| CN106556679B true CN106556679B (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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2016
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| CN103894469A (en) * | 2014-04-04 | 2014-07-02 | 燕山大学 | Solid particle medium thermal expansion forming method for light alloy tubular component |
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