拉伸试验用夹具
By setting multiple centering blocks on the chuck and sliding them together, the chuck has the ability to converge or disperse, which solves the problem of the chuck's inability to be centered and positioned, achieves accurate positioning of the sample, reduces test errors, and improves the accuracy of test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 周宏伟
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-17
AI Technical Summary
The jaws of the existing clamps cannot center and position the specimen, resulting in the specimen axis not being parallel to the direction of the tensile force, which affects the test results.
A tensile testing fixture is designed, comprising multiple centering blocks mounted on the clamps. These centering blocks are slidably connected to the clamps, enabling them to converge towards or disperse towards the clamp axis. Simultaneously, the centering blocks abut against the outer surface of the specimen's center, supporting the specimen and restricting its movement within the jaws, thus achieving the purpose of centering and positioning the specimen.
This method enables the centering and positioning of the specimen, reduces experimental errors, and improves the accuracy of experimental results.
Smart Images
Figure CN224518332U_ABST
Abstract
Claims
1. A tensile test fixture comprising a cylindrical collet (1) having a jaw (11) formed in the end face of one end of the collet (1) and extending radially therefrom, characterised in that: The chuck (1) has multiple centering blocks (2) on its end face with jaws (11). The multiple centering blocks (2) are evenly arranged around the circumference of the chuck (1) and are all slidably connected to the chuck (1) in the radial direction.
2. The tensile test jig according to claim 1, characterized by: The centering block (2) has a V-shaped groove (21) on one side facing the axis of the chuck (1). Both inclined surfaces of the groove (21) are parallel to the axis of the chuck (1) and are symmetrically arranged with the axis of the chuck (1) as the center.
3. The tensile test grip of claim 1, wherein: The chuck (1) is covered with a sleeve (3) for covering the opening of the jaws (11) on the outer surface of the chuck (1), and the sleeve (3) can move along the axial direction of the chuck (1) on the chuck (1).
4. The tensile test grip of claim 3, wherein: The chuck (1) has an external thread on its outer surface facing away from the jaws (11), and the sleeve (3) is connected to the chuck (1) by a threaded connection at its opposite end facing away from the jaws (11).
5. The tensile test grip of claim 4, wherein: The outer circular surface of the sleeve (3) is provided with a plurality of strip grooves (31) extending axially toward the sleeve (3), and the plurality of strip grooves (31) are evenly arranged around the circumference of the sleeve (3).
6. The tensile test grip of claim 3, wherein: The chuck (1) has a sliding groove (12) on the end face with jaws (11) that corresponds to a plurality of centering blocks (2). The plurality of sliding grooves (12) extend radially along the chuck (1), and one end of the sliding groove (12) penetrates the outer circular surface of the chuck (1). One end of the centering block (2) is embedded in the sliding groove (12) and slides in fit.
7. The tensile test grip of claim 6, wherein: The slide (12) is rotatably connected to a lever (4) at one end facing the outer circular surface of the chuck (1), and the center line of the rotation trajectory is perpendicular to the axis of the chuck (1); One end of the lever (4) abuts against the side of the corresponding centering block (2) facing away from the axis of the clamp (1), and the other end extends to the outer surface of the sleeve (3), and the lever (4) is located on the movement trajectory of the sleeve (3).
8. The tensile test grip of claim 7, wherein: The centering block (2) has a guide groove (22) extending axially toward the chuck (1) on one side away from the axis of the chuck (1), and a slider (23) is slidably fitted in the guide groove (22); One end of the slider (23) protrudes outside the opening of the guide groove (22) and is hinged to one end of the lever (4).
9. The tensile testing fixture according to claim 8, characterized in that: A crossbar (24) is fixed to one end of the slide (12) facing the outer circular surface of the clamp (1) by bolts, and the axis of the crossbar (24) is perpendicular to the axis of the clamp (1).
10. The tensile test grip of claim 9, wherein: The lever (4) is fitted around the crossbar (24) and rotates in coordination.