CN107764664A - A kind of electric field-assisted high pressure torsion testing machine - Google Patents
A kind of electric field-assisted high pressure torsion testing machine Download PDFInfo
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- CN107764664A CN107764664A CN201710927892.3A CN201710927892A CN107764664A CN 107764664 A CN107764664 A CN 107764664A CN 201710927892 A CN201710927892 A CN 201710927892A CN 107764664 A CN107764664 A CN 107764664A
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- furnace body
- fixing axle
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- down head
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Abstract
A kind of electric field-assisted high pressure torsion testing machine, it is mainly：The upper furnace body under shed that upper shed is provided with cover plate is connected with upper moved cross beam, and moved cross beam is also connected with two conjunction stove hydraulic cylinder piston rod free ends on this, and the conjunction stove hydraulic cylinder body is fixed on entablature.The under shed of the upper furnace body is corresponding with the upper shed of lower furnace body, and the under shed of the lower furnace body is fixed on lower moved cross beam.The piston rod upper end of axially loaded hydraulic cylinder is connected with push-down head fixing axle axle bed and the copper electrode being enclosed on thereon, push-down head fixing axle upper end is connected with the push-down head being placed in upper furnace body, seaming chuck corresponding thereto is provided with push-down head, the end that coupled seaming chuck fixing axle is reached on entablature is cased with spur gear, copper electrode and locking nut successively, and the spur gear is meshed with the output gear on servo motor output shaft.The present invention solves the material that plastic deformation ability is too poor at room temperature, and the problem of rupture and Fragmentation Phenomena occurs in twist process.
Description
Technical field
The present invention relates to a kind of Materials Processing Engineering equipment, particularly high pressure torsion device.
Background technology
High pressure torsion technique is a kind of typical acutely plasticity severe deformation technique, and sheet material can be fully refined using the technique
Crystal grain, crystallite dimension is set to reach sub-micron or nanoscale, so as to greatly improve physical chemistry, mechanics and the plastic deformation of material
Etc. performance.During high pressure torsion, mould is mainly made up of upper die and lower die, and upper mould is descending during work and sample is applied pressed
Power, lower mould starts to rotate after reaching both constant-pressures, applies a moment of torsion on sample end face by active friction, in moment of torsion and pressure
Make sample that compression and detrusion occur under the collective effect of power.
High pressure torsion technique is generally carried out at normal temperatures, and device structure is complex, and function is single, can only carry out room
The lower high pressure torsion deformation of temperature.The preferable material of plastic deformation ability at room temperature is generally only applicable to, if material room temperature
Under plastic deformation ability it is too poor, occur in twist process rupture and Fragmentation Phenomena.
The content of the invention
Carry out carrying out high pressure torsion and electric field simple in construction in a heated state it is an object of the invention to provide a kind of
Additional high pressure torsion testing machine.
Technical scheme is specific as follows：
The invention mainly comprises upper furnace body, lower furnace body, seaming chuck fixing axle, push-down head fixing axle, upper moved cross beam, lower work
Dynamic crossbeam, axially loaded hydraulic cylinder body, axially loaded hydraulic cylinder, conjunction stove hydraulic cylinder body, close stove hydraulic cylinder, servomotor,
Cooling water channel, column, airway tube and spur gear.Wherein, the vertical ground feet support upper end that lower end fixes on the ground is provided with frame,
The frame has horizontally disposed entablature and sill, is separately fixed between upper and lower crossbeam provided with two radicles on two crossbeams
Vertical column, the column is also each passed through corresponding through hole on moved cross beam and lower moved cross beam, through hole and column it
Between be respectively equipped with the guide sleeve being fixed on upper and lower moved cross beam.Plate shaped upper moved cross beam center is provided with through hole, and the through hole is straight
Footpath is identical with cylindrical shape upper furnace body internal diameter, and the upper furnace body under shed is connected by flange with upper moved cross beam.Moved cross beam on this
Also it is connected with being located at the two of upper furnace body both sides vertical conjunction stove hydraulic cylinder piston rod free ends, the conjunction stove hydraulic cylinder body is then fixed
On entablature.Upper furnace body is provided with and spies on aperture mirror and passage, and the passage is provided with the airway tube of supplied gas disengaging.Upper stove
Body upper shed is provided with the cover plate closed.The under shed of the upper furnace body is corresponding with the upper shed of tubular lower furnace body, Liang Zhetong
Axis, the under shed of the lower furnace body are fixed on plate shaped lower moved cross beam by flange.It is vertical to be provided with ground feet support center
Axially loaded hydraulic cylinder, its cylinder body upper end is fixed on sill, and its piston rod is fixed through sill upper end with push-down head
Axle axle bed and the copper electrode being enclosed on thereon are connected by bolt.The push-down head fixing axle being connected as a single entity with push-down head fixing axle axle bed
The cooling-water duct being coaxial therewith inside is set, the entery and delivery port of the cooling-water duct is respectively provided at the two of push-down head fixing axle lower end
Side, push-down head fixing axle upper end set circular passage, and cooling water flows into from the water inlet of push-down head fixing axle lower end, passes through cooling water
Passage, the circular passage of push-down head fixing axle upper end is flowed through, flowed out finally by the delivery port of fixing axle lower end opposite side.Push
Head fixing axle is upward through through hole upper end corresponding on lower moved cross beam by connector and under being placed in upper furnace body
Pressure head is flexibly connected, due to upper push-down head and fixing axle contact area be much larger than with workpiece side contact area, so ensureing work
Make relative slide does not occur between push-down head and fixing axle while part deforms.It is provided with and its phase on the push-down head
Corresponding seaming chuck, it is flexibly connected with seaming chuck fixing axle lower end, the seaming chuck fixing axle with push-down head fixing axle coaxial line
The cooling-water duct being coaxial therewith inside is set, the entery and delivery port of the cooling-water duct is respectively provided at the two of seaming chuck fixing axle lower end
Side, seaming chuck fixing axle lower end set circular passage, and cooling water flows into from the water inlet of seaming chuck fixing axle upper end, passes through cooling water
Passage, the circular passage of seaming chuck fixing axle lower end is flowed through, flowed out finally by the delivery port of fixing axle upper end opposite side.Upper pressure
Head fixing axle is upward through the corresponding through hole of upper furnace body cover plate and the corresponding through hole of entablature, best seaming chuck are fixed
Rolling bearing is provided between axle and entablature, the fixation shaft end of the seaming chuck on entablature is reached and is cased with successively upwards by entablature
Spur gear, copper electrode and locking nut, the spur gear and the output gear being located on the servo motor output shaft on entablature
It is meshed.
The present invention has the following advantages that compared with prior art：
1st, the present invention can be processed to various materials, solve the material that plastic deformation ability is too poor at room temperature, turned round
The problem of rupture and Fragmentation Phenomena occurs during turning.
2nd, the structure of testing machine is more simple, easy to operation.
3rd, the axially loaded hydraulic cylinder for providing axial compressive force is arranged on frame lower end, there is provided the servomotor of circumferential twisting resistance
The resistance to overturning of equipment can be effectively improved installed in this design of frame upper end.
Brief description of the drawings
Fig. 1 is the main view half-section diagram of the present invention.
Schematic diagram cuts open in the left view office that Fig. 2 is the present invention.
In figure：1. moved cross beam on the lower furnace body 7. of 5. guide sleeve of ground feet support 2. sill, 3. column, 4. times moved cross beams 6.
8. the rolling bearing of 13. locking nut of upper furnace body 9. upper furnace body cover plate, 10. seaming chuck fixing axle, 11. entablature, 12. spur gear 14.
15. the push-down head fixing axle axle bed 21. of 19. cooling water channel of cooling water channel 16. seaming chuck, 17. push-down head, 18. push-down head fixing axle 20.
The airway tube 27. of 25. passage of the axially loaded 24. times copper electrodes of hydraulic cylinder of the axially loaded hydraulic cylinder body 23. of piston rod 22. 26.
Close the servomotor 31. of copper electrode 30. conjunction stove hydraulic cylinder 32. on the output gear 29. of stove hydraulic cylinder 28. and spy on aperture mirror.
Embodiment
In the schematic diagram of the electric field-assisted high pressure torsion testing machine shown in Fig. 1 and Fig. 2, lower end fixes on the ground perpendicular
The straight upper end of ground feet support 1 is provided with frame, and the frame has horizontally disposed entablature 11 and sill 2, is provided between upper and lower crossbeam
Two radicles are separately fixed at the vertical column 3 on two crossbeams, and the column is also each passed through moved cross beam 7 and lower moved cross beam
Corresponding through hole on 4, the guide sleeve 5 being fixed on upper and lower moved cross beam is respectively equipped between through hole and column.On plate shaped
Moved cross beam center is provided with through hole, and the through-hole diameter is identical with the internal diameter of cylindrical shape upper furnace body 8, and the upper furnace body under shed passes through flange
It is connected with upper moved cross beam.Moved cross beam is also with being located at the two of the upper furnace body both sides vertical piston rods of conjunction stove hydraulic cylinder 31 certainly on this
It is connected by holding, the conjunction stove hydraulic cylinder body 27 is then fixed on entablature.Upper furnace body is provided with and spies on aperture mirror 32 and passage 25,
The passage is provided with the airway tube 26 of supplied gas disengaging.Upper furnace body upper shed is provided with the cover plate 9 closed.The upper furnace body
Under shed it is corresponding with the upper shed of tubular lower furnace body 6, both coaxial lines, the under shed of the lower furnace body is fixed on flat by flange
Under plate shape on moved cross beam 4.Vertical axially loaded hydraulic cylinder 23, axially loaded hydraulic cylinder body are provided with ground feet support center
22 upper ends are fixed on sill, and its piston rod 21 is through sill upper end and push-down head fixing axle axle bed 20 and is enclosed on thereon
Lower copper electrode 24 is connected by bolt.Set and be coaxial therewith in the push-down head fixing axle 18 being connected as a single entity with push-down head fixing axle axle bed
Cooling-water duct 19, the entery and delivery port of the cooling-water duct is respectively provided at the both sides of push-down head fixing axle lower end, and push-down head is solid
Dead axle upper end sets circular passage, and push-down head fixing axle is upward through through hole upper end corresponding on lower moved cross beam and passes through connection
Part is flexibly connected with the push-down head 17 that can be placed in upper furnace body, and seaming chuck 16 corresponding thereto is provided with the push-down head,
It is flexibly connected with the lower end of seaming chuck fixing axle 10, is coaxial therewith with being set in the seaming chuck fixing axle of push-down head fixing axle coaxial line
Cooling-water duct 15, the entery and delivery port of the cooling-water duct is respectively provided at the both sides of seaming chuck fixing axle lower end, and seaming chuck is solid
Dead axle lower end sets circular passage.Seaming chuck fixing axle is upward through the corresponding through hole of upper furnace body cover plate and entablature is right with it
The through hole answered, rolling bearing 14 is provided between seaming chuck fixing axle and entablature, the seaming chuck reached on entablature fixes shaft end
Portion is cased with spur gear 12, upper copper electrode 29 and locking nut 13 by entablature successively upwards, and the spur gear is with being located at entablature
On the output shaft of servomotor 30 on output gear 28 be meshed.
The present invention the course of work approximately as：First by between the upper and lower pressure head 16,17 of sample charging apparatus, upper stove
Body 8, by closing the tight closure of stove hydraulic cylinder 31, makes furnace chamber be connected to form vacuum with vacuum system with lower furnace body 6 by airway tube 26
Environment, then axially loaded hydraulic cylinder 23 by push-down head fixing axle 18 drive push-down head on exercise sample upper and lower surface with
The contact of upper and lower pressure head, open control power supply make pulse current by upper and lower copper electrode 29,24 and upper and lower pressure head fixing axle 10,
18 are loaded on sample, and sample is heated to push-down head after certain temperature and continues up to apply sample certain pressure and carry out
Pressurize, afterwards servomotor 30 drive seaming chuck fixing axle 10 to rotate by gear drive, twisting resistance is applied to material.Work as torsion
Process terminates rear deenergization and stops heating, and the axially loaded backhaul of hydraulic cylinder piston 21 drives lower furnace body 6 to move downward, upper furnace body
8 are separated with lower furnace body 6 by closing stove hydraulic cylinder 31, are reached the purpose of blow-on, are then taken out sample.
Embodiment
ZrTiAlV alloy high pressure torsion deformation techniques：A diameter of 10~20mm, a height of 1~2mm zircaloy sample are put
Put in push-down head center, start hydraulic press, push-down head start upper enforcement sample upper surface contacted with seaming chuck lower surface and
Push-down head contacts, lower furnace chamber in closure, and push-down head continuation is up to give sample to apply 3~5GPa pressure, starts servomotor and passes through
Seaming chuck reverses 1~3 circle to sample, is pressed specific direct current pulse power source and compacting using upper and lower mould and energization copper electrode
Power is put on zircaloy sample, by loading 2000~5000A pulse currents, plasma caused by pulse current is made conjunction
Golden inner ion electric discharge heat production, alloy are brought rapidly up to 300 DEG C~800 and are incubated.It is straight to reverse obtained zircaloy sample
Footpath is changed into 13~34mm, is highly changed into 0.5~0.8mm.Average grain size is changed into 5~30 μm from original 300~350 μm.
Claims (2)
- A kind of 1. electric field-assisted high pressure torsion testing machine, it is characterised in that：On the vertical ground feet support that lower end fixes on the ground End is provided with frame, and the frame has horizontally disposed entablature and sill, is fixed respectively provided with two radicles between upper and lower crossbeam Vertical column on two crossbeams, the column are also each passed through corresponding through hole on moved cross beam and lower moved cross beam, logical The guide sleeve being fixed on upper and lower moved cross beam is respectively equipped between hole and column, plate shaped upper moved cross beam center is provided with logical Hole, the through-hole diameter is identical with cylindrical shape upper furnace body internal diameter, and the upper furnace body under shed is connected by flange with upper moved cross beam, should Upper moved cross beam is also connected with being located at the two of upper furnace body both sides vertical conjunction stove hydraulic cylinder piston rod free ends, the conjunction stove hydraulic cylinder Cylinder body is then fixed on entablature, and upper furnace body is provided with and spies on aperture mirror and passage, and the passage is provided with airway tube, upper furnace body Upper shed is provided with the cover plate closed, and the under shed of the upper furnace body is corresponding with the upper shed of tubular lower furnace body, and both are coaxial Line, the under shed of the lower furnace body are fixed on plate shaped lower moved cross beam by flange, are provided with vertically at ground feet support center Axially loaded hydraulic cylinder, its cylinder body upper end are fixed on sill, and its piston rod passes through sill upper end and push-down head fixing axle Axle bed and the copper electrode being enclosed on thereon are connected by bolt, in the push-down head fixing axle being connected as a single entity with push-down head fixing axle axle bed If the cooling-water duct being coaxial therewith, push-down head fixing axle is upward through through hole upper end corresponding on lower moved cross beam and passed through Connector is flexibly connected with the push-down head being placed in upper furnace body, and seaming chuck corresponding thereto is provided with the push-down head, its Be flexibly connected with seaming chuck fixing axle lower end, with set in the seaming chuck fixing axle of push-down head fixing axle coaxial line be coaxial therewith it is cold But aquaporin, seaming chuck fixing axle are upward through the corresponding through hole of upper furnace body cover plate and the corresponding through hole of entablature, Reach the fixation shaft end of the seaming chuck on entablature and spur gear, copper electrode and locking nut, institute are cased with by entablature successively upwards State spur gear and be meshed with the output gear being located on the servo motor output shaft on entablature.
- 2. electric field-assisted high pressure torsion testing machine according to claim 1, it is characterised in that：Seaming chuck fixing axle and upper horizontal stroke Rolling bearing is provided between beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710927892.3A CN107764664A (en) | 2017-10-09 | 2017-10-09 | A kind of electric field-assisted high pressure torsion testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710927892.3A CN107764664A (en) | 2017-10-09 | 2017-10-09 | A kind of electric field-assisted high pressure torsion testing machine |
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| Publication Number | Publication Date |
|---|---|
| CN107764664A true CN107764664A (en) | 2018-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710927892.3A Pending CN107764664A (en) | 2017-10-09 | 2017-10-09 | A kind of electric field-assisted high pressure torsion testing machine |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829630A (en) * | 2012-08-21 | 2012-12-19 | 燕山大学 | Horizontal type counter-extrusion discharge sintering smelting machine |
| CN104233143A (en) * | 2014-08-26 | 2014-12-24 | 燕山大学 | Electric field-assisted thermal treatment method of ZrTiAlV alloy sheets |
| CN104889186A (en) * | 2015-06-18 | 2015-09-09 | 燕山大学 | Electrical field assisted forward and backward combined extrusion forming method for ZrTiAlV alloy |
| CN105296903A (en) * | 2015-10-29 | 2016-02-03 | 燕山大学 | High-pressure twisting-electric field assistant thermal treatment fine grain method for ZrTiAlV alloy |
| CN106891009A (en) * | 2017-01-26 | 2017-06-27 | 燕山大学 | A kind of multidirectional discharge sintering extruder |
| CN106925648A (en) * | 2017-04-18 | 2017-07-07 | 燕山大学 | A kind of electric field-assisted high pressure torsion device and high pressure torsion method |
-
2017
- 2017-10-09 CN CN201710927892.3A patent/CN107764664A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829630A (en) * | 2012-08-21 | 2012-12-19 | 燕山大学 | Horizontal type counter-extrusion discharge sintering smelting machine |
| CN104233143A (en) * | 2014-08-26 | 2014-12-24 | 燕山大学 | Electric field-assisted thermal treatment method of ZrTiAlV alloy sheets |
| CN104889186A (en) * | 2015-06-18 | 2015-09-09 | 燕山大学 | Electrical field assisted forward and backward combined extrusion forming method for ZrTiAlV alloy |
| CN105296903A (en) * | 2015-10-29 | 2016-02-03 | 燕山大学 | High-pressure twisting-electric field assistant thermal treatment fine grain method for ZrTiAlV alloy |
| CN106891009A (en) * | 2017-01-26 | 2017-06-27 | 燕山大学 | A kind of multidirectional discharge sintering extruder |
| CN106925648A (en) * | 2017-04-18 | 2017-07-07 | 燕山大学 | A kind of electric field-assisted high pressure torsion device and high pressure torsion method |
Non-Patent Citations (1)
| Title |
|---|
| 华亮 等: "《机车车辆概论》", 30 September 2010, 北京交通大学出版社 * |
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Application publication date: 20180306 |