Clamp with adjustable clamping thickness for fatigue crack growth rate test
By designing a fixture including a fixture body, adjustment block, screws, fixing clips and pins, the adjustability of the clamp thickness is achieved, and the problem that existing fixtures cannot adapt to samples of different thicknesses is solved, reducing the test cycle and reducing costs.
Patent Information
- Application Number
- CN202421530786.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-01
AI Technical Summary
The existing fixtures have fixed thicknesses and cannot adapt to test samples of different thickness sizes for fatigue crack propagation, resulting in large test limitations, high cost and long cycles.
A fixture including a fixture body, an adjustment block, a screw, a fixing clip and a pin is designed, and the clamp thickness is adjusted by designing the adjustment block and a fixing clip.
The clamping of samples of different thickness sizes is achieved, which reduces the test cycle, reduces the cost, and improves the flexibility and efficiency of the test.
Smart Images
Figure CN222800489U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of clamping tools, in particular to a clamp with adjustable clamping thickness for fatigue crack growth rate testing. Background Art
[0002] Existing technical solutions: According to GB / T 6398 "Methods for fatigue crack growth in fatigue testing of metallic materials", there is a certain proportional relationship between the sample size and the sample thickness. Different thicknesses require an adapted fixture for clamping, but the existing fixtures are of fixed thickness and cannot be adjusted.
[0003] Existing problems: The fixture with fixed clamping thickness can only adapt to the fatigue crack growth test of specimens of one thickness size, and cannot meet the fatigue crack growth test of specimens of different thickness sizes. If fatigue crack growth tests of samples of different thicknesses are required, it is necessary to design and process tooling fixtures separately, which is costly, has a long cycle, and has great limitations in the test, so it needs to be improved. Utility Model Content
[0004] The utility model aims to provide a clamp for fatigue crack growth rate test with adjustable clamping thickness, which can meet the effect of fatigue crack growth test of samples with different thicknesses.
[0005] The above technical purpose of the utility model is achieved through the following technical scheme: a clamp for fatigue crack growth rate test with adjustable clamping thickness, including a clamp body, the number of the clamp bodies is two, and the inner sides of the two clamp bodies are plugged with adjustment blocks, the inside of the adjustment blocks are plugged with pins, the middle of the pins are sleeved with specimens, both sides of the outside of the adjustment blocks are overlapped with fixing clips, and the internal threads of the fixing clips are connected with screws.
[0006] By adopting the above technical scheme, when clamping the sample, the pin is inserted into the inside of the sample, and the pin is passed through the through holes inside the clamp body and the adjusting block. Then, the fixing clamp is buckled on the left and right sides of the pin. The adjusting block and the fixing clamp are provided with threaded holes adapted to the screws. The ends of the fixing clamp are buckled on the two ends of the pin, and the tail of the fixing clamp fits the adjusting block. The screw is threadedly connected to the inside of the fixing clamp and the adjusting block through the threaded holes, so that the pin can be limited inside the clamp body and the adjusting block, and the number of the clamp body and the adjusting block is two, so that the left and right sides of the sample can be clamped, so that the device can design and process adjustment blocks of different thicknesses to meet the needs of samples of different thicknesses, thereby realizing fatigue crack growth tests with adjustable clamping thickness and shortening the test cycle.
[0007] The utility model is further configured as follows: the ends of the two clamp bodies are cylindrical, and the two clamp bodies are symmetrical to each other.
[0008] By adopting the above technical solution, the two clamp bodies are symmetrically arranged, thereby being able to clamp the left and right sides of the sample.
[0009] The utility model is further configured as follows: the number of the fixing clips is four, and the four fixing clips form a group of two, and each group of fixing clips is distributed on the left and right sides of the adjustment block.
[0010] By adopting the above technical solution, the number of the clamp body and the adjustment block is two, and each set of fixing clamps is distributed on the left and right sides of each adjustment block, thereby being able to lock the two ends of the pin.
[0011] The utility model is further configured as follows: an anti-skid pad is sleeved on the middle of the screw, and anti-skid particles are fixedly connected to the outside of the anti-skid pad.
[0012] By adopting the above technical solution, the anti-skid gasket and the anti-skid particles increase the friction force, thereby preventing the screws from falling off.
[0013] The utility model is further configured as follows: a cavity is provided inside each of the two clamp bodies, and bolts are threadedly connected inside the cavity.
[0014] By adopting the above technical solution, the bolt is threadedly connected to the cavity inside the clamp body, and the bolt extends to the inside of the clamp body.
[0015] The utility model is further configured as follows: one end of the bolt is rotatably connected to an L-rod, the bottom end of the L-rod is provided with a bottom plate, and a slideway is provided inside the bottom plate.
[0016] By adopting the above technical solution, one end of the L-rod is rotatably connected to the end of the bolt, and the L-rod is limited inside the bolt, so that the L-rod is not separated from the bolt.
[0017] The utility model is further configured as follows: the L-rod extends to the inside of the slideway, and the L-rod is slidably connected to the inside of the slideway.
[0018] By adopting the above technical solution, the L rod is slid so that the L rod slides in the slideway inside the bottom plate, thereby enabling the distance between the two clamp bodies to be adjusted. When the lengths of the samples are different, the distance between the two clamp bodies can be adjusted so that the device can clamp samples of different lengths.
[0019] The utility model is further configured as follows: locking rods are fixedly connected to both sides of the L rod, and a locking ring is threadedly connected to the outside of the locking rod.
[0020] By adopting the above technical solution, when locking the L rod, the locking ring is twisted so that the locking ring is displaced outside the locking rod, and the locking ring contacts the outer wall of the base plate, thereby being able to lock the locking rod and the L rod.
[0021] The utility model is further configured as follows: the number of the locking rods is two, and the two locking rods are distributed on the left and right sides of the L rod.
[0022] By adopting the above technical solution, the two locking rods lock the two sides of the L rod, thereby improving the fixing effect.
[0023] The utility model is further configured as follows: through holes are provided inside the clamp body, the adjustment block and the sample.
[0024] By adopting the above technical solution, the pin passes through the through hole to the inside of the fixture body, the adjustment block and the sample, and both ends of the pin extend to the outside of the fixture body.
[0025] The beneficial effects of the utility model are:
[0026] 1. The utility model, through the arrangement among the clamp body, the adjusting block, the screw, the fixing clamp, the pin and the specimen, can design and process the adjusting blocks of different thicknesses to meet the requirements of specimens of different thicknesses, thereby realizing fatigue crack growth test with adjustable clamping thickness and shortening the test cycle.
[0027] 2. The utility model, through the arrangement of the cavity, the bolt, the L-rod, the bottom plate, the slideway, the locking rod and the locking ring, can clamp specimens of different lengths by adjusting the distance between the two clamp bodies when the lengths of the specimens are different. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0029] Figure 1 This is a schematic diagram of the explosion structure of the utility model;
[0030] Figure 2 This is a schematic diagram of the top view structure of the utility model;
[0031] Figure 3 This is a side structural diagram of the slideway of the utility model;
[0032] Figure 4 It is a schematic diagram of the structure of the slideway of the utility model from a top view.
[0033] In the figure, 1. fixture body; 2. adjustment block; 3. screw; 4. fixing clamp; 5. pin; 6. specimen; 7. cavity; 8. bolt; 9. L rod; 10. bottom plate; 11. slideway; 12. locking rod; 13. locking ring; 14. through hole. DETAILED DESCRIPTION
[0034] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0035] Reference Figure 1-4A clamp for fatigue crack growth rate test with adjustable clamping thickness, comprising a clamp body 1, two clamp bodies 1, and an adjusting block 2 is inserted into the inner side of each of the two clamp bodies 1, a pin 5 is inserted into the inner side of the adjusting block 2, a sample 6 is sleeved in the middle of the pin 5, and fixing clips 4 are overlapped on both sides of the outer side of the adjusting block 2, and a screw 3 is connected to the inner thread of the fixing clip 4. When clamping the sample 6, the pin 5 is inserted into the inner side of the sample 6, and the pin 5 passes through the through hole 14 inside the clamp body 1 and the adjusting block 2, and then the fixing clip 4 is buckled on the left and right sides of the pin 5, and the adjusting block 2 and the fixing clip 4 are provided with threaded holes adapted to the screw 3, and the ends of the fixing clip 4 are buckled on the two ends of the pin 5, and the tail of the fixing clip 4 is connected to the adjusting block 2. The screw 3 is threadedly connected to the inside of the fixing clamp 4 and the adjusting block 2 through the threaded hole, so that the pin 5 can be limited inside the clamp body 1 and the adjusting block 2, and the number of the clamp body 1 and the adjusting block 2 is two, so that the left and right sides of the sample 6 can be clamped, so that the device can design and process adjustment blocks of different thicknesses to meet the needs of samples of different thicknesses, thereby realizing fatigue crack growth tests with adjustable clamping thickness and shortening the test cycle. The ends of the two clamp bodies 1 are cylindrical, and the two clamp bodies 1 are symmetrical to each other. The two clamp bodies 1 are symmetrically arranged, so that the left and right sides of the sample 6 can be clamped. The number of the fixing clamps 4 is four, and the four fixing clamps 4 are grouped in pairs, and each group of fixing clamps 4 is distributed on the adjusting block 2. On the left and right sides, there are two clamp bodies 1 and adjustment blocks 2, and each set of fixing clips 4 is distributed on the left and right sides of each adjustment block 2, so as to lock the two ends of the pin 5. The middle part of the screw 3 is sleeved with an anti-skid gasket, and the outside of the anti-skid gasket is fixedly connected with anti-skid particles. The anti-skid gasket and the anti-skid particles increase the friction force, so as to prevent the screw 3 from falling off. The interior of the two clamp bodies 1 is provided with a cavity 7, and the internal thread connection of the cavity 7 is provided with a bolt 8. The bolt 8 is threadedly connected to the cavity 7 inside the clamp body 1, and the bolt 8 extends to the interior of the clamp body 1, and one end of the bolt 8 is rotatably connected to an L rod 9, and a bottom plate 10 is provided at the bottom end of the L rod 9. A slideway 11 is provided inside the bottom plate 10, and one end of the L rod 9 is rotatably connected to the end of the bolt 8, and L The rod 9 is limited inside the bolt 8, so that the L rod 9 does not separate from the bolt 8. The L rod 9 extends to the inside of the slideway 11, and the L rod 9 is slidably connected inside the slideway 11. The L rod 9 is slid so that the L rod 9 slides in the slideway 11 inside the bottom plate 10, so that the distance between the two clamp bodies 1 can be adjusted. When the lengths of the specimens 6 are different, the distance between the two clamp bodies 1 can be adjusted so that the device can clamp specimens of different lengths. Locking rods 12 are fixedly connected on both sides of the L rod 9, and the external thread of the locking rod 12 is connected to a locking ring 13. When the L rod 9 is locked, the locking ring 13 is twisted so that the locking ring 13 is displaced outside the locking rod 12, and the locking ring 13 contacts the outer wall of the bottom plate 10.Then, the locking rod 12 and the L rod 9 can be locked. There are two locking rods 12, and the two locking rods 12 are distributed on the left and right sides of the L rod 9. The two locking rods 12 lock the two sides of the L rod 9 to improve the fixing effect. The fixture body 1, the adjustment block 2 and the sample 6 are all provided with through holes 14. The pin 5 passes through the through holes 14 to the inside of the fixture body 1, the adjustment block 2 and the sample 6, and the two ends of the pin 5 extend to the outside of the fixture body 1.
[0036] In the utility model, when clamping the sample 6, the pin 5 is inserted into the inside of the sample 6, and the pin 5 passes through the through hole 14 inside the clamp body 1 and the adjusting block 2, and then the fixing clamp 4 is buckled on the left and right sides of the pin 5. The adjusting block 2 and the fixing clamp 4 are provided with threaded holes adapted to the screw 3. The ends of the fixing clamp 4 are buckled on the two ends of the pin 5, and the tail of the fixing clamp 4 fits the adjusting block 2. The screw 3 is threadedly connected to the inside of the fixing clamp 4 and the adjusting block 2 through the threaded hole, so that the pin 5 can be limited inside the clamp body 1 and the adjusting block 2, and the number of the clamp body 1 and the adjusting block 2 is two, so that the left and right sides of the sample 6 can be clamped, so that the device can design and process adjustment blocks of different thicknesses to meet the requirements of different thickness sizes. inch sample, thereby realizing fatigue crack growth test with adjustable clamping thickness and shortening the test cycle. One end of the L rod 9 is rotatably connected to the end of the bolt 8, and the L rod 9 is limited inside the bolt 8, so that the L rod 9 is not separated from the bolt 8. The L rod 9 is slid so that the L rod 9 slides in the slideway 11 inside the bottom plate 10, so that the distance between the two clamp bodies 1 can be adjusted. When the lengths of the samples 6 are different, the distance between the two clamp bodies 1 can be adjusted so that the device can clamp samples of different lengths. When the L rod 9 is locked, the locking ring 13 is twisted so that the locking ring 13 is displaced outside the locking rod 12, and the locking ring 13 contacts the outer wall of the bottom plate 10, so that the locking rod 12 and the L rod 9 can be locked.
[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A clamp for fatigue crack growth rate testing with adjustable clamping thickness, comprising a clamp body (1), characterized in that: There are two clamp bodies (1), and an adjustment block (2) is inserted into the inner side of each of the two clamp bodies (1), a pin (5) is inserted into the interior of the adjustment block (2), a sample (6) is sleeved in the middle of the pin (5), and fixing clips (4) are overlapped on both sides of the exterior of the adjustment block (2), and a screw (3) is connected to the interior of the fixing clip (4) through a thread.
2. The fatigue crack growth rate test fixture with adjustable clamping thickness according to claim 1, characterized in that: The ends of the two clamp bodies (1) are cylindrical, and the two clamp bodies (1) are symmetrical to each other.
3. The fatigue crack growth rate test fixture with adjustable clamping thickness according to claim 1, characterized in that: The number of the fixing clips (4) is four, and the four fixing clips (4) form a group of two each, and each group of fixing clips (4) is distributed on the left and right sides of the adjustment block (2).
4. The fatigue crack growth rate test fixture with adjustable clamping thickness according to claim 1, characterized in that: An anti-skid pad is sleeved on the middle of the screw (3), and anti-skid particles are fixedly connected to the outside of the anti-skid pad.
5. The fatigue crack growth rate test fixture with adjustable clamping thickness according to claim 1, characterized in that: A cavity (7) is provided inside each of the two clamp bodies (1), and a bolt (8) is threadedly connected inside the cavity (7).
6. The fatigue crack growth rate test fixture with adjustable clamping thickness according to claim 5, characterized in that: One end of the bolt (8) is rotatably connected to an L-rod (9), a bottom plate (10) is provided at the bottom end of the L-rod (9), and a slideway (11) is provided inside the bottom plate (10).
7. The fatigue crack growth rate test fixture with adjustable clamping thickness according to claim 6, characterized in that: The L-rod (9) extends to the inside of the slideway (11), and the L-rod (9) is slidably connected to the inside of the slideway (11).
8. The fatigue crack growth rate test fixture with adjustable clamping thickness according to claim 6, characterized in that: Locking rods (12) are fixedly connected to both sides of the L rod (9), and a locking ring (13) is threadedly connected to the outside of the locking rod (12).
9. The fatigue crack growth rate test fixture with adjustable clamping thickness according to claim 8, characterized in that: The number of the locking rods (12) is two, and the two locking rods (12) are distributed on the left and right sides of the L rod (9).
10. The fatigue crack growth rate test fixture with adjustable clamping thickness according to claim 1, characterized in that: Through holes (14) are provided inside the clamp body (1), the adjustment block (2) and the sample (6).