Tensile experiment clamp assembly

Abstract

The invention discloses a tensile experiment clamp assembly, which comprises a clamp body and a bushing, wherein the clamp body comprises a frame body comprising an upper plate, a right side plate, a bottom plate and a left side plate sequentially connected end to end, a connecting bolt perpendicular to the upper plate and positioned in the middle area of the upper surface of the upper plate, a laser emitter arranged on the lower surface of the upper plate, and laser of which irradiates towards the bottom plate and is collinear with the axis of the connecting bolt, and a first mounting groove formed in the bottom plate and extending from the side edge of the bottom plate to the middle; the bushing comprises a mounting part matched with the second mounting groove, a limiting part extending outwards from the top end of the mounting part for limiting the mounting part to move in the direction away from the connecting bolt, and a second mounting groove extending inwards from one side of the mounting part and one side of the limiting part for containing and hanging the tensile test bar. The problem that a clamp slips is solved.

Description

technical field [0001] The invention relates to the field of tensile experiments of mechanical properties, in particular to a clamp assembly for tensile experiments. Background technique [0002] At present, some of the tensile test rod clamping devices of the testing machines produced by mechanical performance testing machine manufacturers use upper and lower V-shaped alveolar chucks, with two upper parts and two lower parts. Close up and clamp both ends of the test rod in the V-shaped groove, and then rely on the V-shaped triangular teeth to engage the head of the test rod to pull the test rod off. The use of this clamping technology has the following disadvantages: 1. When the hardness of the test rod material is high (HRC ≥ 40), the chuck is prone to slippage, and sometimes the test rod cannot be broken because the V-shaped teeth cannot be engaged. 2. The teeth of the V-groove chuck are easy to break. Due to the high hardness and brittleness of the teeth, after several ...

AI Technical Summary

Problems solved by technology

The use of this clamping technology has the following disadvantages: 1. When the hardness of the test rod material is high (HRC ≥ 40), the chuck is prone to slippage, and sometimes the test rod cannot be broken because the V-shaped teeth cannot be engaged.

2. The teeth of the V-groove chuck are easy to break. Due to the high hardness and brittleness of the teeth, after several times of use, broken teeth and wear often occur, resulting in stretching and slipping.

Once slipping occurs, the tensile test cannot be performed, and new clamps need to be replaced to continue working, and the purchase cost of the clamps is generally relatively high. Under normal circumstances, if the tensile test is carried out every day, it generally needs to be replaced every year. paid, resulting in high maintenance costs

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