CN107515164A - The dynamic test equipment and its method of testing of a kind of rubber tubing - Google Patents
The dynamic test equipment and its method of testing of a kind of rubber tubing Download PDFInfo
- Publication number
- CN107515164A CN107515164A CN201610427451.2A CN201610427451A CN107515164A CN 107515164 A CN107515164 A CN 107515164A CN 201610427451 A CN201610427451 A CN 201610427451A CN 107515164 A CN107515164 A CN 107515164A
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- China
- Prior art keywords
- oil cylinder
- rubber tubing
- torsion
- dynamic
- dolly
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- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 238000010998 test method Methods 0.000 title claims abstract description 12
- 238000005452 bending Methods 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 7
- 238000009864 tensile test Methods 0.000 claims abstract description 3
- 238000002474 experimental method Methods 0.000 claims description 9
- 230000008602 contraction Effects 0.000 claims description 6
- 102000008579 Transposases Human genes 0.000 description 9
- 108010020764 Transposases Proteins 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012812 general test Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/26—Investigating twisting or coiling properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/28—Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning
Abstract
The present invention relates to dynamic test equipment, the dynamic test equipment and its method of testing of specifically a kind of rubber tubing, equipment includes bending dolly, vehicle guide and the bending apparatus being separately mounted on ground, stretching device, torsion device, stretching device and torsion device are located at the both sides of bending apparatus respectively, the vehicle guide of installation on the ground is provided between stretching device and torsion device, vehicle guide is provided with bending dolly sliding back and forth；Method of testing is divided into dynamic bending testing method, dynamic tensile testing method and dynamic torsion test method, every kind of test device has been equipped with two corresponding hydraulic jacks, flexibility and the diversity of whole dynamic test equipment are added, the phenomenon for avoiding rubber tubing from being short of power when doing dynamic and testing.
Description
Technical field
The present invention relates to dynamic test equipment, the dynamic test equipment of specifically a kind of rubber tubing and its test side
Method.
Background technology
Due to the natural property of rubber tubing, the physical characteristic and performance level of rubber can all change, generally
Changed according to the difference of used rubber types with the time.Traditional rubber tubing test is to make by people daily
During, the empirical data of accumulation goes to gradually improve rubber tubing product.At present, it is domestic not to be directed to rubber tubing also
The dynamic test equipment of product.And in some important rubber tubing products (such as ocean oil transportation rubber tubing), measurement rubber tubing
Dynamic data, be an indispensable part in rubber tube.So on the production line of rubber tubing, a kind of rubber is researched and developed
The dynamic test equipment of plastic pipe, it is always at home and abroad a problem to get most of the attention.
Advanced modern technique of dynamic measurement role is increasing, and its importance is more and more obvious, and it is widely
Applied to every subjects field, turn into the indispensable pillar of discipline development.The manufacture craft of each rubber tubing, is required for
Some dynamic tests verify whether the technique of this rubber tubing is reasonable.Because the weight of rubber tubing is larger, itself is flexible
Change is complicated, and general test platform is difficult to the test of rubber tubing product；And this rubber tubing is small quantities of volume production again
Product, the demand in society is not more, and this is the immediate cause for causing to lack both at home and abroad rubber tubing test equipment.
The content of the invention
For existing rubber tubing weight is larger, itself flexible variety is complicated and also the dynamic parameter of test rubber tubing compared with
For difficulty the problem of, it is an object of the invention to provide a kind of dynamic test equipment of rubber tubing and its method of testing.
The purpose of the present invention is achieved through the following technical solutions：
The dynamic test equipment of the present invention includes bending dolly, vehicle guide and the bending dress being separately mounted on ground
Put, stretching device, torsion device, wherein stretching device and torsion device are located at the both sides of the bending apparatus, the drawing respectively
Stretch and the vehicle guide of installation on the ground is provided between device and torsion device, the vehicle guide is provided with sliding back and forth curved
Bent dolly；The bending apparatus is led including left rail, left curved cylinder, active dolly, follow-up trolley, right curved cylinder and the right side
Rail, the left rail and right guide rail are separately mounted on the ground of the vehicle guide both sides, the left curved cylinder and right bending
Being separately positioned on left rail and right guide rail for oil cylinder, is connected to the active dolly moved back and forth along left rail on piston rod
And the follow-up trolley moved back and forth along right guide rail；The torsion device includes reversing seat, left handed twist oil cylinder, torq and right torsion
Oil cylinder, the torsion seat are installed on the ground, and the torq, which is rotatably installed in, to be reversed on seat, is respectively equipped with the both sides of torq
On the torsion seat, the left handed twist oil cylinder that makes torq twist and right torsion oil cylinder；The stretching device includes
Stretching seat on the ground and the stretching oil cylinder on the stretching seat, for pulling follow-up trolley are installed.
Wherein：The left rail and right guide rail are symmetricly set in the both sides of vehicle guide, and the left rail and right guide rail are
Upper and lower two layers, the left curved cylinder and right curved cylinder are arranged on left rail and the right guide rail of any layer；The left bending
The piston cylinder seat of oil cylinder and right curved cylinder is separately fixed on left rail and right guide rail, piston rod and the active dolly and with
Dynamic dolly is connected, and one end of the active dolly and follow-up trolley is the ring flange being connected with rubber tubing end flange face, separately
One end is slidably connected with the left rail and right guide rail respectively；One end of the vehicle guide extends active dolly and follow-up trolley
Between underface；
Alignment pin for being connected with the stretching oil cylinder is installed on the follow-up trolley；The left handed twist oil cylinder and the right side
The both sides that oil cylinder is symmetricly set on torq are reversed, the piston rod end of the left handed twist oil cylinder and right torsion oil cylinder is connected to
The both sides of seat are reversed, both sides of the piston cylinder seat respectively with the torq are connected.
The method of testing of the dynamic test equipment of rubber tubing of the present invention：
The method of testing is divided into dynamic bending testing method, dynamic tensile testing method and dynamic and reverses survey
Method for testing, wherein：
When rubber tubing does dynamic bending experiment, by the end flange face of rubber tubing two be separately mounted to the active dolly and
On follow-up trolley, the center section of rubber tubing is by the bending dolly come Auxiliary support, the left curved cylinder and right bending
The piston rod of oil cylinder extends or shunk simultaneously, drives the active dolly and follow-up trolley to be done respectively along left rail, right guide rail past
Multiple motion, the center section of rubber tubing can move reciprocatingly with the bending dolly on vehicle guide；
When rubber tubing does dynamic tensile experiment, the active dolly on the left rail is removed, one end of rubber tubing
Flange face is arranged in the torq, and another end flange face is arranged on the follow-up trolley, the follow-up trolley and the drawing
The stretching oil cylinder stretched on seat is connected, and the tension test of rubber tubing is done by the flexible of stretching oil cylinder, rubber tubing
The center section bending dolly Auxiliary support；
When rubber tubing does dynamic torsion test, the active dolly on the left rail is removed, one end of rubber tubing
Flange face is arranged in the torq, and another end flange face is arranged on the follow-up trolley, the follow-up trolley and the drawing
The stretching oil cylinder stretched on seat is connected, and the center section of rubber tubing bends dolly Auxiliary support with described, the stretching oil cylinder
Piston rod extends, and when rubber tubing be in horizontality, the piston rod for stretching oil cylinder is kept into the state, described in startup
Reverse the left handed twist oil cylinder of seat both sides and right torsion oil cylinder, make the centre of gyration of the rubber tubing along the torsion seat counterclockwise with
Reciprocally swinging clockwise.
Wherein：When rubber tubing does dynamic tensile experiment, bending dolly transfixion on vehicle guide；In rubber
When plastic pipe does dynamic torsion test, start left handed twist oil cylinder, the right torsion oil cylinder for reversing seat both sides, make the left handed twist
The piston rod of oil cylinder is in elongation state, the right piston rod for reversing oil cylinder is in contraction state, or left handed twist oil
The piston rod of cylinder is in contraction state, the right piston rod for reversing oil cylinder is in elongation state, two kinds of working conditions it is reciprocal
Alternately, realize rubber tubing along it is described torsion seat the centre of gyration counterclockwise with reciprocally swinging clockwise.
Advantages of the present invention is with good effect：
1. the every kind of test device of the present invention has been equipped with two corresponding hydraulic jacks, adds whole dynamic test and set
Standby flexibility and diversity, the phenomenon for avoiding rubber tubing from being short of power when doing dynamic and testing.
2. the present invention organically combines stretching device, bending apparatus, torsion device these parts, what is simplified moves
The structure of state test device, it is easy for installation, it is easy to safeguard, space is smaller.
3. the method for testing of the present invention is simple to operate, operating efficiency is high.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of dynamic test equipment of the present invention；
Fig. 2 is the structural front view of dynamic test equipment of the present invention；
Fig. 3 is the structure left view of dynamic test equipment of the present invention；
Fig. 4 is the structure top view of dynamic test equipment of the present invention；
Wherein：1 is reverses seat, and 2 be left handed twist oil cylinder, and 3 be torq, and 4 be left rail, and 5 be left curved cylinder, based on 6
Dynamic dolly, 7 be follow-up trolley, and 8 be alignment pin, and 9 be right curved cylinder, and 10 be right guide rail, and 11 be stretching oil cylinder, and 12 be stretching
Seat, 13 be bending dolly, and 14 be vehicle guide, and 15 be right torsion oil cylinder.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figures 1-4, dynamic test equipment of the invention include bending dolly 13, vehicle guide 14, bending apparatus,
Stretching device and torsion device, wherein bending apparatus, stretching device and torsion device are fixed on flatly with independent posture
On face, stretching device and torsion device are provided with installation respectively positioned at the both sides of bending apparatus between stretching device and torsion device
Vehicle guide 14 on the ground, the vehicle guide 14 are provided with bending dolly 13 sliding back and forth.The one of vehicle guide 14
End extends the underface between active dolly 6 and follow-up trolley 7.
Bending apparatus is led including left rail 4, left curved cylinder 5, active dolly 6, follow-up trolley 7, right curved cylinder 9 and the right side
Rail 10, the left rail 4 and right guide rail 10 are symmetrically fixed on the ground of the both sides of vehicle guide 14, left curved cylinder 5 and right bending
Oil cylinder 9 is separately positioned on left rail 4 and right guide rail 10；Left rail 4 and right guide rail 10 are two layers up and down, left curved cylinder
5 and right curved cylinder 9 be arranged on any layer left rail 4 and right guide rail 10 on；The work of left curved cylinder 5 and right curved cylinder 9
Plug cylinder seat is separately fixed on left rail 4 and right guide rail 10, and piston rod is connected with active dolly 6 and follow-up trolley 7, active dolly
6 and one end of follow-up trolley 7 be the ring flange that is connected with rubber tubing end flange face, the other end is led by sliding block and a left side respectively
Rail 4 and right guide rail 10 are slidably connected, and can be moved back and forth along left rail 4 and right guide rail 10.
Torsion device includes torsion transposase 11, left handed twist oil cylinder 2, torq 3 and right torsion oil cylinder 15, the torsion transposase 11 and is fixed on
On ground, torq 3, which is rotatably installed in, to be turned round on transposase 11, is respectively equipped with the both sides of torq 3 on torsion transposase 11, is made torsion
The left handed twist oil cylinder 2 and right torsion oil cylinder 15 that rotary head 3 twists；Left handed twist oil cylinder 2 is symmetricly set on right torsion oil cylinder 15
The piston rod end of the both sides of torq 3, the left handed twist oil cylinder 2 and right torsion oil cylinder 15 is connected to the both sides for turning round transposase 11,
Both sides of the piston cylinder seat respectively with torq 3 are connected.
Stretching device include installation stretching seat 12 on the ground and on the stretching seat 12, it is servo-actuated small for pulling
The stretching oil cylinder 11 of car 7, the alignment pin 8 for being connected with stretching oil cylinder 11 is installed on follow-up trolley 7.
The method of testing of the dynamic test equipment of rubber tubing of the present invention is divided into dynamic bending testing method, dynamic is drawn
Testing method and dynamic torsion test method are stretched, wherein：
When rubber tubing does dynamic bending experiment, by the end flange face of rubber tubing two be separately fixed at active dolly 6 and with
On dynamic dolly 7, the center section of rubber tubing is fixed by bending dolly 13 come Auxiliary support, the piston cylinder seat of left curved cylinder 5
On left rail 4, its piston rod be connected with active dolly 6, the piston cylinder seat of right curved cylinder 9 is fixed on right guide rail 10, it
Piston rod is connected with follow-up trolley 7.The piston rod of left curved cylinder 5 and right curved cylinder 9 extends or shunk simultaneously, drives actively
Dolly 6 and follow-up trolley 7 move reciprocatingly along left rail 4, right guide rail 10 respectively, and the center section of rubber tubing can be with bending
Dolly 13 moves reciprocatingly on vehicle guide 14.
When rubber tubing does dynamic tensile experiment, manually the active dolly 6 on left rail 4 is removed, the one of rubber tubing
End flange face is fixed in torq 3, is turned round transposase 11 and is fixed by screws on ground, another end flange face of rubber tubing is consolidated
It is scheduled on follow-up trolley 7, the follow-up trolley 7 is connected with two stretching oil cylinders 11 on stretching seat 12 with two alignment pins 8, is passed through
The piston rod of stretching oil cylinder 11 stretches to do the tension test of rubber tubing, and the center section of rubber tubing uses bending dolly 13 auxiliary
Support is helped, bends the transfixion on vehicle guide 14 of dolly 13.
When rubber tubing does dynamic torsion test, manually the active dolly 6 on left rail 4 is removed, the one of rubber tubing
End flange face is fixed in torq 3, and torq 3 is connected by bearing with turning round transposase 11, and can be around the centre of gyration for turning round transposase 11
Swing；Another end flange face of rubber tubing is fixed on follow-up trolley 7, the follow-up trolley 7 and two drawings on stretching seat 12
Stretch oil cylinder 11 to be connected with two alignment pins 8, the center section bending Auxiliary support of dolly 13 of rubber tubing.Stretch oil cylinder
11 piston rod elongation, when rubber tubing is in naturally horizontally state, the piston rod for stretching oil cylinder 11 is kept into the elongate
State；Start the left handed twist oil cylinder 2 for turning round transposase 11 both sides and right torsion oil cylinder 15, ensure that the piston rod of left handed twist oil cylinder 2 is in elongation
State, the right piston rod for reversing oil cylinder 15 is in contraction state, or the piston rod of left handed twist oil cylinder 2 is in contraction state, right
The piston rod for reversing oil cylinder 15 is in elongation state, the past complex Alternating of both working conditions, realizes rubber tubing along torsion
Seat 1 the centre of gyration present counterclockwise with reciprocally swinging clockwise.
The present invention is not on the premise of rubber tubing surface quality is damaged, using hydraulic jack as dynamical element, to rubber tube
Road does corresponding bending, stretching and reverses three kinds of dynamics and tests, and is required according to the dynamic performance experiment of each rubber tubing, test
The performance data of corresponding rubber tubing.
Claims (9)
- A kind of 1. dynamic test equipment of rubber tubing, it is characterised in that：Including bending dolly (13), vehicle guide (14) and divide Bending apparatus, stretching device, torsion device on the ground is not installed, wherein stretching device and torsion device are respectively positioned at described The both sides of bending apparatus, the vehicle guide (14) of installation on the ground is provided between the stretching device and torsion device, this is small Car guide rail (14) is provided with bending dolly (13) sliding back and forth；The bending apparatus includes left rail (4), left curved cylinder (5), active dolly (6), follow-up trolley (7), right curved cylinder (9) and right guide rail (10), the left rail (4) and right guide rail (10) It is separately mounted on the ground of the vehicle guide (14) both sides, the left curved cylinder (5) and the difference of right curved cylinder (9) It is arranged on left rail (4) and right guide rail (10), the active dolly moved back and forth along left rail (4) is connected on piston rod (6) follow-up trolley (7) and along right guide rail (10) moved back and forth；The torsion device includes reversing seat (1), left handed twist oil cylinder (2), torq (3) and right torsion oil cylinder (15), the torsion seat (1) are installed on the ground, and the torq (3) is rotatably installed in Reverse on seat (1), be respectively equipped with the both sides of torq (3) on the torsion seat (1), turn round torq (3) The left handed twist oil cylinder (2) turned and right torsion oil cylinder (15)；The stretching device include installation stretching seat (12) on the ground and Stretching oil cylinder (11) on the stretching seat (12), for pulling follow-up trolley (7).
- 2. the dynamic test equipment of rubber tubing as described in claim 1, it is characterised in that：The left rail (4) and right guide rail (10) both sides of vehicle guide (14) are symmetricly set in, the left rail (4) and right guide rail (10) are two layers up and down, and the left side is curved Bent oil cylinder (5) and right curved cylinder (9) are arranged on the left rail (4) and right guide rail (10) of any layer.
- 3. the dynamic test equipment of rubber tubing as described in claim 2, it is characterised in that：The left curved cylinder (5) and the right side The piston cylinder seat of curved cylinder (9) is separately fixed on left rail (4) and right guide rail (10), piston rod and the active dolly (6) and follow-up trolley (7) is connected, and one end of the active dolly (6) and follow-up trolley (7) is and rubber tubing end flange face The ring flange of connection, the other end are slidably connected with the left rail (4) and right guide rail (10) respectively.
- 4. the dynamic test equipment of rubber tubing as described in claim 2, it is characterised in that：One end of the vehicle guide (14) Extend the underface between active dolly (6) and follow-up trolley (7).
- 5. the dynamic test equipment of rubber tubing as described in claim 1, it is characterised in that：Installed on the follow-up trolley (7) There is the alignment pin (8) for being connected with the stretching oil cylinder (11).
- 6. the dynamic test equipment of rubber tubing as described in claim 1, it is characterised in that：The left handed twist oil cylinder (2) and the right side Reverse the both sides that oil cylinder (15) is symmetricly set on torq (3), the left handed twist oil cylinder (2) and the piston rod of right torsion oil cylinder (15) End is connected to the both sides for reversing seat (1), and both sides of the piston cylinder seat respectively with the torq (3) are connected.
- A kind of 7. method of testing of the dynamic test equipment of rubber tubing described in claim 1, it is characterised in that：The test side Method is divided into dynamic bending testing method, dynamic tensile testing method and dynamic torsion test method, wherein：When rubber tubing does dynamic bending experiment, by the end flange face of rubber tubing two be separately mounted to the active dolly (6) and On follow-up trolley (7), the center section of rubber tubing is by the bending dolly (13) come Auxiliary support, the left curved cylinder (5) and the piston rod of right curved cylinder (9) extends or shunk simultaneously, drives the active dolly (6) and follow-up trolley (7) respectively Moved reciprocatingly along left rail (4), right guide rail (10), the center section of rubber tubing can be as the bending dolly (13) be small Car guide rail moves reciprocatingly on (14)；When rubber tubing does dynamic tensile experiment, the active dolly (6) on the left rail (4) is removed, the one of rubber tubing End flange face is arranged in the torq (3), and another end flange face is arranged on the follow-up trolley (7), the follow-up trolley (7) it is connected with the stretching oil cylinder (11) on the stretching seat (12), rubber tube is done by the flexible of stretching oil cylinder (11) The tension test in road, the center section of rubber tubing bend dolly (13) Auxiliary support with described；When rubber tubing does dynamic torsion test, the active dolly (6) on the left rail (4) is removed, the one of rubber tubing End flange face is arranged in the torq (3), and another end flange face is arranged on the follow-up trolley (7), the follow-up trolley (7) it is connected with the stretching oil cylinder (11) on the stretching seat (12), the center section of rubber tubing bends dolly (13) with described Auxiliary support, the piston rod elongation of the stretching oil cylinder (11), when rubber tubing is in horizontality, by the stretching oil cylinder (11) piston rod keeps the state, starts the left handed twist oil cylinder (2) for reversing seat (1) both sides and right torsion oil cylinder (15), Make rubber tubing along it is described torsion seat (1) the centre of gyration counterclockwise with reciprocally swinging clockwise.
- 8. the method for testing as described in claim 7, it is characterised in that：It is described curved when rubber tubing does dynamic tensile experiment Bent dolly (13) transfixion on vehicle guide (14).
- 9. the method for testing as described in claim 7, it is characterised in that：When rubber tubing does dynamic torsion test, start institute The left handed twist oil cylinder (2) for reversing seat (1) both sides, right torsion oil cylinder (15) are stated, is in the piston rod of the left handed twist oil cylinder (2) Elongation state, the right piston rod for reversing oil cylinder (15) are in contraction state, or the piston rod of the left handed twist oil cylinder (2) Elongation state is in contraction state, the right piston rod for reversing oil cylinder (15), the past complex Alternating of two kinds of working conditions is real The centre of gyration of the existing rubber tubing along the torsion seat (1) counterclockwise with reciprocally swinging clockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610427451.2A CN107515164A (en) | 2016-06-16 | 2016-06-16 | The dynamic test equipment and its method of testing of a kind of rubber tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610427451.2A CN107515164A (en) | 2016-06-16 | 2016-06-16 | The dynamic test equipment and its method of testing of a kind of rubber tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107515164A true CN107515164A (en) | 2017-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610427451.2A Pending CN107515164A (en) | 2016-06-16 | 2016-06-16 | The dynamic test equipment and its method of testing of a kind of rubber tubing |
Country Status (1)
| Country | Link |
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| CN (1) | CN107515164A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109540696A (en) * | 2019-01-10 | 2019-03-29 | 江苏华神特种橡胶制品股份有限公司 | A kind of rubber hose sub-assembly bend test device |
| CN111638131A (en) * | 2020-06-30 | 2020-09-08 | 株洲时代新材料科技股份有限公司 | Rubber bearing composite loading test device and test method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540696A (en) * | 2019-01-10 | 2019-03-29 | 江苏华神特种橡胶制品股份有限公司 | A kind of rubber hose sub-assembly bend test device |
| CN109540696B (en) * | 2019-01-10 | 2023-11-21 | 江苏华神特种橡胶制品股份有限公司 | Bending test device for rubber hose assembly |
| CN111638131A (en) * | 2020-06-30 | 2020-09-08 | 株洲时代新材料科技股份有限公司 | Rubber bearing composite loading test device and test method |
| CN111638131B (en) * | 2020-06-30 | 2023-03-31 | 株洲时代新材料科技股份有限公司 | Rubber bearing composite loading test device and test method |
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