Assistant stretching tool for directly clamping steel wire rope

Abstract

The invention discloses an assistant stretching tool for directly clamping a steel wire rope. The assistant stretching tool comprises a jaw seat and a clamping space formed in the jaw seat, wherein at least one pair of jaw clamp plates and a jaw piece at the inner side of each jaw clamp plate are arranged in the clamping space, the steel wire rope is clamped between two jaw pieces, a lining plate is arranged between each jaw clamp plate and the inner wall of the clamping space, clamping surfaces, for clamping the steel wire rope, of the jaw pieces are two crossed wavy planes, and multiple friction grains for enhancing friction force between the jaw pieces and the steel wire rope are graved in the clamping surfaces. By adopting the assistant stretching tool, the steel wire rope can be directly and reliably clamped and is damaged little, and the effectiveness of a steel wire rope tension test can be ensured; the assistant stretching tool is compact in structure, convenient for clamping, simple in structure, and reliable in performance; procedures such as scattering, cleaning, hook bending and lead pouring in a process of preparing a steel wire rope sample are omitted, the tension test can be performed by putting the sample directly cut into the assistant stretching tool, and the test efficiency is greatly improved.

Description

technical field [0001] The invention relates to a stretching aid, in particular to a stretching aid used on a horizontal tensile testing machine to directly clamp a steel wire rope. Background technique [0002] With the progress and development of society, wire rope has been more and more widely used. The quality of the required steel wire rope performance can only be detected by the corresponding breaking tensile test. [0003] At present, manufacturing enterprises and scientific research institutions mostly use the casting method for breaking and stretching of steel wire ropes, but the preparation of steel wire rope samples requires processes such as breaking up, cleaning, hooking, and lead filling, which takes a long time to prepare samples and is inefficient. Moreover, poor cleaning can easily cause test failure. Toothed jaws are generally used when clamping the wire rope. Since the wire rope is made of multi-strand twisted thin steel wires, the toothed jaws will pinc...

AI Technical Summary

Problems solved by technology

[0003] At present, manufacturing enterprises and scientific research institutions mostly use the casting method for breaking and stretching steel wire ropes, but the process of preparing steel wire rope samples requires processes such as breaking up, cleaning, hooking, and lead filling, which takes a long time to prepare samples and is inefficient.

Moreover, if the cleaning is not good, it is easy to cause the test to fail.

The toothed jaws are generally used when clamping the wire rope. Since the wire rope is made of multi-strand twisted thin steel wires, the toothed jaws will pinch the wire, causing the pinched wire rope to break inside the jaws and affecting the maximum breaking force of the wire rope.

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