Tensile testing machine of steel wire rope

Abstract

The invention relates to a tensile testing machine of a steel wire rope. The tensile testing machine comprises a stretcher, wherein a base is fixed on a rack of the stretcher; a lower clamping head isarranged just above the base; the top of an upper clamping head is fixed with the rack through a hoisting column; a steel wire rope to be tested is arranged between the clamping heads; reflection patches are stuck on parts, which are close to the clamping heads, of the steel wire rope; the reflection patches can be used for reflecting laser ray with low energy; a laser measuring instrument is arranged at the front side of the stretcher; after laser is emitted by a laser emission opening, the laser is reflected to a receiving end through an emission patch. According to the tensile testing machine of the steel wire rope, provided by the invention, the reflection patches are stuck on the steel wire rope and the clamping heads are used for stretching the steel wire rope; the laser is emittedby the laser measuring instrument and the reflected laser is received, so that the elongation amount and the elongation percentage of the steel wire rope are measured in real time and the problem thata previous contact type testing device is easy to damage is avoided; the elongation percentage at the breaking moment of the steel wire rope can also be measured.

Description

technical field [0001] The invention relates to a tensile testing machine for steel wire ropes. Background technique [0002] After the production of the steel wire rope is completed, some samples need to be selected for tensile test to test the parameters of the steel wire rope. A section of the steel wire rope is selected as a sample, and the two ends of the steel wire rope are wound and fixed on the two clamping heads on the tensile testing machine. On the upper frame beam of the testing machine, the lower clamping head is fixed on the base of the testing machine, and the upper clamping head can be lifted up and down, so as to stretch the steel wire rope to test its elongation and other conventional parameters. [0003] A conventional tensile testing machine fixes a grating on the steel wire rope sample between its two clamping heads, and detects the stretched length of the steel wire rope through the grating. However, the grating is in direct contact with the steel wire...

AI Technical Summary

Problems solved by technology

However, the grating is in direct contact with the steel wire rope, and the steel wire is likely to break during the stretching process, which will damage the grating and affect the service life of the grating

In addition, the traditional tensile testing machine cannot detect the elongation of the wire rope at the moment of fracture, because once a steel wire breaks, the grating may be displaced, resulting in the inability to accurately measure the elongation of the wire rope at the moment of fracture

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