Clamping device of tensile testing machine suitable for plate-shaped samples

Abstract

The invention relates to a clamping device of a tensile testing machine suitable for plate-shaped samples, belonging to the technical field of the high-end manufacturing equipment industry and material testing machines. The clamping device comprises a worm gear and worm contraction mechanism, a connecting rod amplification mechanism and a wedge clamping mechanism, wherein the worm gear and worm contraction mechanism adopts a special worm gear with two-way internal threads to drive connecting rods on two sides to contract, the connecting rod amplification mechanism pushes a wedge clamping block to move downwards, and finally the effect of clamping a sample is achieved. The clamping device has the amplification principle of the connecting rod mechanism and the self-locking effect of the wedge mechanism at the same time and can ensure the firm tensile clamping force. The clamping device has the advantage of being simple in structure, adopting a self-centering type clamping way and being suitable for a tensile test for plate-shaped samples being 0.5-5mm in thickness. The special worm gear mechanism with two-way internal threads is adopted for driving connecting rods, so that the clamping torque can be further amplified, and the reliable connecting self-locking performance is provided.

Description

technical field [0001] The invention relates to the technical field of high-end manufacturing equipment and material testing machines, in particular to a clamping device of a tensile testing machine suitable for plate samples. Background technique [0002] Any mechanical parts or tools are often subjected to various forms of external forces during use. For example, the steel cable on the crane is affected by the pulling force of the suspended object; the connecting rod on the diesel engine is not only affected by the pulling force, but also affected by the impact force when transmitting power; the shaft parts are affected by the bending moment and torque. function and so on. This requires that metal materials must have the ability to withstand mechanical loads without exceeding the allowable deformation or damage. This ability is the mechanical properties of the material. The mechanical properties of common metal materials refer to the ability of metal materials to resist ...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the mechanical structure and clamping principle of the existing mechanical clamps, some can provide a large initial clamping force, but the clamping force will gradually decrease with the increase of the tensile load, and it is similar to a wedge Although this type of fixture can ensure good clamping stability, the initial clamping force it can provide is relatively small. These two constraints limit the clamping efficiency of many fixtures in the entire process of material testing.

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