CN116413139A - Clamp fatigue stress testing method - Google Patents
Clamp fatigue stress testing method Download PDFInfo
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- CN116413139A CN116413139A CN202310392398.7A CN202310392398A CN116413139A CN 116413139 A CN116413139 A CN 116413139A CN 202310392398 A CN202310392398 A CN 202310392398A CN 116413139 A CN116413139 A CN 116413139A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009662 stress testing Methods 0.000 title abstract description 6
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims description 63
- 238000003825 pressing Methods 0.000 claims description 12
- 238000009661 fatigue test Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- 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
- G01N3/02—Details
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- 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
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Physics & Mathematics (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a clamp fatigue stress testing method, which comprises the following steps: the invention relates to the technical field of clamp test, in particular to a clamp test device, which is characterized in that a collet to be tested is extracted, a shaft is clamped in the collet, the collet is clamped in a collet pneumatic clamping seat in test equipment, and a plurality of collets are clamped through the collet pneumatic clamping seat. According to the clamp fatigue stress testing method, the plurality of chucks are fixed in a repeated mode, then the pushing force and the pulling force are tested simultaneously, after the testing is completed, the clamps can be quickly exchanged, different testing contents are carried out, the operation is simple, the use is convenient, the testing effect is good, and the chucks are loaded manually.
Description
Technical Field
The invention relates to the technical field of clamp testing, in particular to a clamp fatigue stress testing method.
Background
The clamp replaces manual operation, and in actual use, the clamp is also huge in difference due to the specificity of the workpiece; how to ensure the reliability of the clamp is urgently considered so as to reduce the risk in actual production; the collet is required to be subjected to fatigue stress test after production to detect the product quality of the collet, but when the collet is detected by the existing detection equipment, external pressure is applied to the collet after the collet is fixed to simulate various working environments, so that the operation is inconvenient and errors are easily caused.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a clamp fatigue stress testing method, which solves the problems.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a method for testing fatigue stress of a clamp comprises the following steps:
step one, preparing detection: extracting a collet chuck to be detected, clamping a shaft in the collet chuck, clamping the collet chucks in a collet chuck pneumatic clamping seat in detection equipment, clamping a plurality of collet chucks through the collet chuck pneumatic clamping seat, fixing the collet chucks, starting a hydraulic rod to drive an upper pressing table to slide downwards on a detection table, and driving a connecting shaft pneumatic clamping seat to move downwards to clamp the connecting shaft, so that the fixing is completed;
step two, detecting, namely starting a driving air cylinder to drive a receiving plate to move, enabling the receiving plate to drive a first clamping frame and a second clamping frame to move towards the direction of a collet chuck, enabling guide inclined planes on the surfaces of the first clamping frame and the second clamping frame to be in butt joint with the collet chuck, enabling the first clamping frame and the second clamping frame to rotate and stretch a tension spring to move under the driving of a rotating rod, driving the first clamping frame and the second clamping frame to stretch, enabling the receiving plate to continuously move forwards, enabling the surface of a clamping groove of the collet chuck to be attached to the surface of the collet chuck, enabling the tension spring to lose stress relaxation to drive the first clamping frame and the second clamping frame to move on the rotating rod to clamp the collet chuck, enabling a detection sensor to be attached to the surface of the collet chuck, collecting internal stress data, and then retracting the driving air cylinder to drive the first clamping frame and the second clamping frame to retract;
step three, fatigue test: the method comprises the steps that a starting motor drives a collet chuck pneumatic clamping seat to rotate, drives the collet chuck and a driving shaft to rotate, then rotates through a connecting shaft pneumatic clamping seat above, performs fatigue test, and during test, supplies air to an inflation cavity through an external air source, drives an air pushing plate to slide in the inner cavity of the inflation cavity, drives a push rod to move outwards, drives a reset spring to stretch, and applies stress in different directions to the surface of the driving shaft through the contact between a push block and a pull block and the surface of the driving shaft, wherein the number of the push block and the pull block is three, and after detection is finished, the second step is repeated, detection is performed through a detection sensor, and stress data are collected;
fourth, detecting again: the air in the air filling cavity is pumped away through an external air source, negative pressure is formed inside the air filling cavity, the ejector rod is driven to retract into the rotating end under the tension of the reset spring, then the rotating end is rotated to drive the push block and the pull block to rotate, the pull of the pull block is applied to the connecting shaft which is abutted by the push block, the force of the push block is applied to the connecting shaft which is pulled by the pull block, then the second step is repeated, the detection is carried out through the detection sensor, and stress data are collected.
As a further scheme of the invention: the top fixedly connected with hydraulic stem of detection platform, the top of hydraulic stem piston rod and the bottom fixed connection of last platform, the top of detection platform rotates and is connected with the pneumatic grip slipper of collet chuck through motor drive, the bottom of going up the platform rotates and is connected with the pneumatic grip slipper of connecting axle.
As a further scheme of the invention: in the first step, the collet to be detected is extracted when the collet is fixed, then the shaft is clamped in the collet, then the collet is clamped in the collet pneumatic clamping seat in the detection equipment, and a plurality of collets are clamped through the collet pneumatic clamping seat to fix the collet.
As a further scheme of the invention: and in the second step, when the connecting shaft is fixed, the hydraulic rod is started to drive the upper pressing table to slide downwards on the detection table, and the pneumatic clamping seat of the connecting shaft is driven to move downwards to clamp the connecting shaft, so that the fixing is completed.
As a further scheme of the invention: and in the second step, when the first detection is carried out, the driving cylinder is started to drive the bearing plate to move, the bearing plate drives the first clamping frame and the second clamping frame to move towards the direction of the collet chuck, at the moment, the guide inclined planes on the surfaces of the first clamping frame and the second clamping frame are abutted against the collet chuck, under the driving of the rotating rod, the first clamping frame and the second clamping frame rotate to stretch the tension spring to move, the first clamping frame and the second clamping frame are driven to stretch, the bearing plate continues to move forwards, then the surface of the collet chuck clamping groove is attached to the surface of the collet chuck, and at the moment, the tension spring loses stress and relaxes to drive the first clamping frame and the second clamping frame to move on the rotating rod to clamp the collet chuck.
As a further scheme of the invention: and secondly, attaching a detection sensor to the surface of the collet chuck during first collection, collecting internal stress data, and then retracting the driving cylinder to drive the first clamping frame and the second clamping frame to retract.
As a further scheme of the invention: and thirdly, when external pressure is applied, the starting motor drives the collet chuck pneumatic clamping seat to rotate, the collet chuck and the driving shaft are driven to rotate, then the connecting shaft pneumatic clamping seat above the collet chuck and the driving shaft are driven to rotate, fatigue test is carried out, during test, the air supply is carried out on the air inflation cavity through an external air source, the air pushing plate is driven to slide in the inner cavity of the air inflation cavity, the ejector rod is driven to move outwards, the ejector rod drives the reset spring to move in a stretching mode, stress in different directions is applied to the surface of the driving shaft through the pushing block and the pulling block, and the pushing block and the pulling block are all provided with three.
As a further scheme of the invention: and step one to step three, when the drive detection sensor resets, the air in the air filling cavity is pumped away through an external air source, negative pressure is formed inside the air filling cavity, the ejector rod is driven to retract into the rotary end under the tension of the reset spring, then the rotary end is rotated to drive the push block and the pull block to rotate, the tension of the pull block is applied to the connecting shaft abutted by the push block, and the force of the push block is applied to the connecting shaft pulled by the pull block.
The detection equipment comprises a detection table, the top of the detection table is fixedly connected with a support column, the periphery of the support column is connected with an upper pressing table in a sliding manner, the top of the detection table is fixedly connected with a hydraulic rod, the top end of a piston rod of the hydraulic rod is fixedly connected with the bottom of the upper pressing table, the top of the detection table is rotationally connected with a collet chuck pneumatic clamping seat driven by a motor, the bottom of the upper pressing table is rotationally connected with a connecting shaft pneumatic clamping seat, the surface of an inner cavity of the detection table is rotationally connected with a rotating end, the inner cavity of the rotating end is provided with an air charging cavity, the inner cavity of the air charging cavity is connected with an air pushing plate in a sliding manner, one side of the air pushing plate is fixedly connected with a push rod, one end of the push rod penetrates through and extends to the outer side of the detection table, the inner cavity of the rotating end is provided with a penetrating groove movably connected with the surface of the push rod, the ejector rod is fixedly connected with a guide plate in the inner cavity of the through groove, the surface of the guide plate is in sliding connection with the inner cavity of the through groove, a reset spring is sleeved on the surface of the inner cavity of the through groove, one end of the reset spring is abutted against the surface of the guide plate, the other end of the reset spring is abutted against the inner cavity of the through groove, one end of the ejector rod is respectively in threaded connection with a push block and a pull block through a thread groove, the surfaces of the push block and the pull block are respectively abutted against the surface of a shaft, the collet chuck pneumatic clamping seats are provided with a plurality of cylinders and are arranged in one-to-one correspondence with the positions of the ejector rod, a driving cylinder is fixedly connected with the surface of the hydraulic rod, one end of a driving cylinder piston rod is fixedly connected with a bearing plate, the top of the bearing plate is fixedly connected with a rotating rod, the surface of the rotating rod is respectively in rotary connection with a first clamping frame and a second clamping frame, the collet chuck clamping groove is formed in one side, opposite to the first clamping frame and the second clamping frame, of the collet chuck clamping groove, guide inclined planes are formed in one ends of the first clamping frame and the second clamping frame, detection sensors are fixedly connected to the surfaces of the first clamping frame and the second clamping frame, connecting frames are fixedly connected to one ends of the first clamping frame and the second clamping frame, and tension springs are fixedly connected to one sides, opposite to the connecting frames, of the first clamping frame and the second clamping frame.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the plurality of collets are fixed at one time, then the test of pushing force and pulling force is carried out simultaneously, and after the test is completed, the collet chucks can be quickly exchanged to carry out different test contents, so that the collet chuck testing device is simple in operation, convenient to use and good in testing effect, and the collet chucks can be loaded manually.
2. According to the invention, the collet can be rapidly clamped by the arrangement of the first clamping frame and the second clamping frame during detection, the sensor is tightly attached to the surface of the collet for data acquisition, and the self-adaptive adjustment can be performed, and the mounting and the dismounting are convenient.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a top view of the structure of the rotating end of the present invention;
FIG. 3 is an enlarged view of a portion of the invention at A in FIG. 2;
fig. 4 is a schematic structural view of a first clamping frame and a second clamping frame according to the present invention.
In the figure: 1. a detection table; 2. a collet chuck pneumatic clamping seat; 3. a compression bar; 4. a support column; 5. a pressing table; 6. pneumatic clamping seat of the connecting shaft; 7. a push rod; 8. a through groove; 9. a guide plate; 10. a return spring; 11. a thread groove; 12. a pushing block; 13. pulling blocks; 14. a driving cylinder; 15. a receiving plate; 16. a rotating lever; 17. a first clamping frame; 18. a collet clamping groove; 19. a detection sensor; 20. a second clamping frame; 21. a guide slope; 22. a connecting frame; 23. a tension spring; 24. an air-filling cavity; 25. and an air pushing plate.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1-4, the present invention provides a technical solution: a method for testing fatigue stress of a clamp comprises the following steps:
step one, preparing detection: extracting a collet chuck to be detected, clamping a shaft in the collet chuck, clamping the collet chucks in a collet chuck pneumatic clamping seat 2 in detection equipment, clamping a plurality of collet chucks through the collet chuck pneumatic clamping seat 2, fixing the collet chucks, starting a hydraulic rod 3 to drive an upper pressing table 5 to slide downwards on a detection table 1, and driving a connecting shaft pneumatic clamping seat 6 to move downwards to clamp the connecting shaft, so that the fixing is completed;
step two, detecting, namely starting a driving cylinder 14 to drive a bearing plate 15 to move, driving the bearing plate 15 to drive a first clamping frame 17 and a second clamping frame 20 to move towards the direction of a collet chuck, abutting guide inclined planes 21 on the surfaces of the first clamping frame 17 and the second clamping frame 20 with the collet chuck, driving a rotating rod 16 to drive the first clamping frame 17 and the second clamping frame 20 to rotate and stretch a tension spring 23 to move so as to drive the first clamping frame 17 and the second clamping frame 20 to open, continuing to move the bearing plate 15, then enabling the surface of a collet chuck clamping groove 18 to be attached to the surface of the collet chuck, enabling the tension spring 23 to lose stress relaxation so as to drive the first clamping frame 17 and the second clamping frame 20 to move on the rotating rod 16, enabling a detection sensor 19 to be attached to the surface of the collet chuck, collecting internal stress data, and then retracting the driving cylinder 14 so as to drive the first clamping frame 17 and the second clamping frame 20 to retract;
step three, fatigue test: the starting motor drives the collet chuck pneumatic clamping seat 2 to rotate, drives the collet chuck and the driving shaft to rotate, then rotates through the connecting shaft pneumatic clamping seat 6 above, performs fatigue test, and when in test, supplies air to the inflation cavity 24 through an external air source, drives the air pushing plate 25 to slide in the inner cavity of the inflation cavity 24, drives the ejector rod 7 to move outwards, drives the reset spring 10 to move in a stretching mode, and applies stress in different directions to the surface of the driving shaft through the pushing block 12 and the pulling block 13 which are abutted against the surface of the driving shaft, wherein the pushing block 12 and the pulling block 13 are respectively provided with three, and after detection is completed, the second step is repeated to detect through the detection sensor 19 again, so that stress data are collected;
fourth, detecting again: the gas in the inflation cavity 24 is pumped away through an external gas source, negative pressure is formed inside the inflation cavity, the ejector rod 7 is driven to retract into the rotating end under the tension of the reset spring 10, then the rotating end is rotated to drive the push block 12 and the pull block 13 to rotate, the pull of the pull block 13 is applied to the connecting shaft abutted by the push block 12, the force of the push block 12 is applied to the connecting shaft pulled by the pull block 13, then the detection is carried out through the detection sensor 19 in a repeated mode, and stress data are collected.
The top fixedly connected with hydraulic stem 3 of detection platform 1, the top of hydraulic stem 3 piston rod and the bottom fixed connection of last platform 5, the top of detection platform 1 rotates and is connected with the pneumatic grip slipper 2 of collet chuck through motor drive, the bottom rotation of going up platform 5 is connected with connecting axle pneumatic grip slipper 6.
In the first step, the collet to be detected is extracted when the collet is fixed, then the shaft is clamped in the collet, then the collet is clamped in the collet pneumatic clamping seat 2 in the detection equipment, and a plurality of collets are all clamped through the collet pneumatic clamping seat 2 to fix the collet.
In the second step, when the connecting shaft is fixed, the hydraulic rod 3 is started to drive the upper pressing table 5 to slide downwards on the detection table 1, and the connecting shaft pneumatic clamping seat 6 is driven to move downwards to clamp the connecting shaft, so that the fixing is completed.
In the second step, when the first detection is performed, the driving cylinder 14 is started to drive the bearing plate 15 to move, the bearing plate 15 drives the first clamping frame 17 and the second clamping frame 20 to move towards the direction of the collet chuck, at the moment, the guide inclined planes 21 on the surfaces of the first clamping frame 17 and the second clamping frame 20 are abutted against the collet chuck, under the driving of the rotating rod 16, the first clamping frame 17 and the second clamping frame 20 rotate to stretch the tension spring 23 to move, the first clamping frame 17 and the second clamping frame 20 are driven to open, the bearing plate 15 continues to move forwards, then the surface of the collet chuck clamping groove 18 is attached to the surface of the collet chuck, at the moment, the tension spring 23 loses stress relaxation to drive the first clamping frame 17 and the second clamping frame 20 to move on the rotating rod 16, and the collet chuck is clamped.
And step two, when the first collection is carried out, the detection sensor 19 is attached to the surface of the collet chuck to collect internal stress data, and then the driving cylinder 14 is retracted to drive the first clamping frame 17 and the second clamping frame 20 to retract.
In the third step, when external pressure is applied, the starting motor drives the collet chuck pneumatic clamping seat 2 to rotate, the collet chuck and the driving shaft are driven to rotate, then the connecting shaft pneumatic clamping seat 6 above is driven to rotate, fatigue test is carried out, during test, the air supply is carried out on the air inflation cavity 24 through an external air source, the air pushing plate 25 is driven to slide in the inner cavity of the air inflation cavity 24, the ejector rod 7 is driven to move outwards, the ejector rod 7 drives the reset spring 10 to stretch, the surface of the driving shaft is abutted with the surface of the driving shaft through the pushing block 12 and the pulling block 13, stress in different directions is applied to the surface of the driving shaft, and three pushing blocks 12 and three pulling blocks 13 are respectively arranged.
And step one to step three, when the driving detection sensor 19 resets, the air in the inflation cavity 24 is pumped away by an external air source, negative pressure is formed in the inflation cavity, the ejector rod 7 is driven to retract into the rotating end under the tension of the reset spring 10, then the rotating end is rotated to drive the push block 12 and the pull block 13 to rotate, the tension of the pull block 13 is applied to the connecting shaft abutted by the push block 12, and the force of the push block 12 is applied to the connecting shaft pulled by the pull block 13.
The detection equipment comprises a detection table 1, a support column 4 is fixedly connected to the top of the detection table 1, an upper pressing table 5 is slidingly connected to the periphery of the support column 4, a hydraulic rod 3 is fixedly connected to the top of the detection table 1, the top of a piston rod of the hydraulic rod 3 is fixedly connected with the bottom of the upper pressing table 5, a collet chuck pneumatic clamping seat 2 driven by a motor is rotationally connected to the top of the detection table 1, a connecting shaft pneumatic clamping seat 6 is rotationally connected to the bottom of the upper pressing table 5, a rotating end is rotationally connected to the inner cavity surface of the detection table 1, an air charging cavity 24 is arranged in the inner cavity of the rotating end, an air pushing plate 25 is slidingly connected to the inner cavity of the air charging cavity 24, a push rod 7 is fixedly connected to one side of the air pushing plate 25, one end of the push rod 7 penetrates and extends to the outer side of the detection table 1, a through groove 8 movably connected to the surface of the push rod 7 is arranged in the inner cavity of the through groove 8, a guide plate 9 is fixedly connected to the inner cavity of the through groove 8, the surface of the guide plate 9 is slidably connected with the inner cavity of the through groove 8, the ejector rod 7 is sleeved with a return spring 10 on the surface of the inner cavity of the through groove 8, one end of the return spring 10 is abutted against the surface of the guide plate 9, the other end of the return spring 10 is abutted against the inner cavity of the through groove 8, one end of the ejector rod 7 is respectively connected with a push block 12 and a pull block 13 in a threaded manner through a threaded groove 11, the surfaces of the push block 12 and the pull block 13 are respectively abutted against the surface of a shaft, the collet chuck pneumatic clamping seat 2 is provided with a plurality of cylinders and is arranged in one-to-one correspondence with the positions of the ejector rod 7, the surface of the hydraulic rod 3 is fixedly connected with a driving cylinder 14, one end of a piston rod of the driving cylinder 14 is fixedly connected with a bearing plate 15, the top of the bearing plate 15 is fixedly connected with a rotating rod 16, the surface of the rotating rod 16 is respectively connected with a first clamping frame 17 and a second clamping frame 20 in a rotating manner, the collet chuck clamping groove 18 has all been seted up to the opposite one side of first holder 17 and second holder 20, and the one end of first holder 17 and second holder 20 all is provided with the direction inclined plane 21, and the surface of first holder 17 and second holder 20 all fixedly connected with detects sensor 19, and the one end of first holder 17 and second holder 20 all fixedly connected with link 22, the opposite one side of two link 22 all fixedly connected with extension spring 23.
The present invention is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present invention.
Claims (8)
1. A method for testing fatigue stress of a clamp is characterized by comprising the following steps: the method comprises the following steps:
step one, preparing detection: the collet is fixed through a detection table (1) of detection equipment, and then the connecting shaft is fixed;
step two, detecting, namely clamping the collet chuck for the first time, then collecting for the first time, and then driving the detection sensor to reset;
step three, fatigue test: applying external pressure to the collet chuck, repeating the second step, detecting through the detection sensor (19), collecting stress data, and then driving the detection sensor to reset;
fourth, detecting again: and (3) driving the detection sensor to reset, and then repeating the steps to detect through the detection sensor (19) and collect stress data.
2. The method for testing fatigue stress of a clamp according to claim 1, wherein: the top fixedly connected with hydraulic rod (3) of detecting platform (1), the top of hydraulic rod (3) piston rod and the bottom fixed connection of last platform (5), the top of detecting platform (1) rotates and is connected with pneumatic grip slipper (2) of collet chuck through motor drive, the bottom of going up platform (5) rotates and is connected with connecting axle pneumatic grip slipper (6).
3. The method for testing fatigue stress of a clamp according to claim 1, wherein: in the first step, the collet to be detected is extracted when the collet is fixed, then the shaft is clamped in the collet, then the collet is clamped in the collet pneumatic clamping seat (2) in the detection equipment, and a plurality of collets are all clamped through the collet pneumatic clamping seat (2) to fix the collet.
4. The method for testing fatigue stress of a clamp according to claim 1, wherein: in the second step, when the connecting shaft is fixed, the hydraulic rod (3) is started to drive the upper pressing table (5) to slide downwards on the detection table (1), and the connecting shaft pneumatic clamping seat (6) is driven to move downwards to clamp the connecting shaft, so that the fixing is completed.
5. The method for testing fatigue stress of a clamp according to claim 1, wherein: in the second step, when the first detection is carried out, the driving cylinder (14) is started to drive the bearing plate (15) to move, the bearing plate (15) drives the first clamping frame (17) and the second clamping frame (20) to move towards the direction of the collet chuck, at the moment, the guide inclined planes (21) on the surfaces of the first clamping frame (17) and the second clamping frame (20) are abutted with the collet chuck, under the driving of the rotating rod (16), the first clamping frame (17) and the second clamping frame (20) rotate to stretch the tension spring (23) to move, the first clamping frame (17) and the second clamping frame (20) are driven to open, the bearing plate (15) continues to move forwards, then the surfaces of the collet chuck clamping grooves (18) are attached to the surfaces of the collet chuck, and at the moment, the tension spring (23) loses stress relaxation to drive the first clamping frame (17) and the second clamping frame (20) to move on the rotating rod (16) to clamp the collet chuck.
6. The method for testing fatigue stress of a clamp according to claim 1, wherein: and secondly, attaching a detection sensor (19) to the surface of the collet chuck during first collection, collecting internal stress data, and then retracting the driving cylinder (14) to drive the first clamping frame (17) and the second clamping frame (20) to retract.
7. The method for testing fatigue stress of a clamp according to claim 1, wherein: in the third step, when external pressure is applied, the starting motor drives the collet chuck pneumatic clamping seat (2) to rotate, the collet chuck and the driving shaft are driven to rotate, then the connecting shaft pneumatic clamping seat (6) above is driven to rotate, fatigue test is carried out, when the fatigue test is carried out, the external air source is used for supplying air to the inflation cavity (24), the air pushing plate (25) is driven to slide in the inner cavity of the inflation cavity (24), the ejector rod (7) is driven to move outwards, the ejector rod (7) drives the reset spring (10) to move in a stretching mode, the push block (12) and the pull block (13) are in contact with the surface of the driving shaft, stress in different directions is applied to the surface of the driving shaft, and the push block (12) and the pull block (13) are all provided with three.
8. The method for testing fatigue stress of a clamp according to claim 1, wherein: and step one to step three, when the detection sensor (19) is driven to reset, the air in the air filling cavity (24) is pumped away through an external air source, negative pressure is formed inside the air filling cavity, the ejector rod (7) is driven to retract into the rotating end under the tension of the reset spring (10), then the rotating end is rotated to drive the rotating positions of the push block (12) and the pull block (13), the pull force of the pull block (13) is applied to the connecting shaft abutted by the push block (12), and the force of the push block (12) is applied to the connecting shaft pulled by the pull block (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310392398.7A CN116413139B (en) | 2023-04-13 | 2023-04-13 | Clamp fatigue stress testing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310392398.7A CN116413139B (en) | 2023-04-13 | 2023-04-13 | Clamp fatigue stress testing method |
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| CN116413139A true CN116413139A (en) | 2023-07-11 |
| CN116413139B CN116413139B (en) | 2024-02-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205374194U (en) * | 2016-02-23 | 2016-07-06 | 南京汽车集团有限公司 | Car transmission shaft sheath draws presses fatigue test device |
| CN109991078A (en) * | 2019-03-17 | 2019-07-09 | 西安交通大学 | A kind of detection fixture improving Compound Material Engineering fatigue behaviour |
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| CN114279781A (en) * | 2021-12-07 | 2022-04-05 | 上海卫星装备研究所 | Preparation device and preparation method of groove type heat pipe mechanical tensile sample |
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| CN217084451U (en) * | 2022-04-07 | 2022-07-29 | 浙江工业大学 | Pipe test piece fatigue test anchor clamps |
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2023
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| CN205374194U (en) * | 2016-02-23 | 2016-07-06 | 南京汽车集团有限公司 | Car transmission shaft sheath draws presses fatigue test device |
| CN209372435U (en) * | 2019-03-12 | 2019-09-10 | 温州弘铭仪器有限公司 | A kind of bicycle front fork vertical fatigue tester |
| CN109991078A (en) * | 2019-03-17 | 2019-07-09 | 西安交通大学 | A kind of detection fixture improving Compound Material Engineering fatigue behaviour |
| CN209784094U (en) * | 2019-04-11 | 2019-12-13 | 盛柏儒 | Clamp and fatigue test equipment |
| CN211426061U (en) * | 2019-10-11 | 2020-09-04 | 中国石油天然气集团有限公司 | Rotatable type clamp system for in-situ fatigue and tensile test |
| CN114279781A (en) * | 2021-12-07 | 2022-04-05 | 上海卫星装备研究所 | Preparation device and preparation method of groove type heat pipe mechanical tensile sample |
| CN217084451U (en) * | 2022-04-07 | 2022-07-29 | 浙江工业大学 | Pipe test piece fatigue test anchor clamps |
| CN114778325A (en) * | 2022-05-06 | 2022-07-22 | 青岛黄海学院 | Device and method for testing metal fatigue of mechanical equipment |
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|---|---|
| CN116413139B (en) | 2024-02-20 |
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