Production method of non-loose steel wire rope

Abstract

The invention provides a production method of a non-loose steel wire rope. The production method comprises the steps of wire rod forming: selecting 304 stainless steel wires with diameter of 5.5mm; surface treatment: soaking the wires in dilute hydrochloric acid to remove an oxide film; wire drawing: drawing the wires with the diameter of 5.5mm into 1.5mm steel wires; stranding: stranding a plurality of layers of steel wires into rope strands; rope laying up: stranding the rope strands around the center line of a rope core on a laying-up machine into a steel wire rope; heat treatment: puttingthe laid-up steel wire rope strand in a heat treatment furnace for heat treatment, and carrying out ultrasonic cleaning and cooling after heat treatment; and inspection: calculating the safety factorof the steel wire rope. The production method provided by the invention is not used in the steel wire rope at present, and the produced steel wire rope has the advantages that all layers of steel wires inside the steel wire rope are in close contact with each other, the non-looseness performance is excellent, the fatigue resistance is good, the stability is good, and the service life is long.

Description

technical field [0001] The invention relates to the field of wire rope production, in particular to a production method of a non-loose wire rope. Background technique [0002] The non-loose performance is an important indicator for inspecting the qualification of steel wire ropes. It is stipulated in the national standard GB1102-74 that "all steel wire ropes should be manufactured without loosening." However, during the drawing and twisting process of steel wire ropes, the steel wire ropes undergo elastic deformation under force. After the rope is closed, there are still elastic stress and residual stress inside, and the diameter of the whole rope becomes uneven. This stress state will cause the wire rope to become loose. The loose wire rope has poor fatigue resistance, poor flexibility, and flexibility. Small, the inner wire will even break early, and the service life will be severely shortened. [0003] In order to eliminate the residual stress inside the wire rope, it is...

AI Technical Summary

Problems solved by technology

This method is difficult to operate, requires a high level of operating skills, consumes a lot of labor and time, and has restrictions on the twist direction of the steel wire rope. It is only suitable for the production of the same direction twisted steel wire rope; straighten

This method is not suitable for steel wire ropes with poor flexibility and high hardness, and it is easy to cause wire rope breakage during repeated bending and straightening; 3. Use a wire rope pre-deformer to pass the steel wire rope through the three pressure rollers of the deformer according to a certain curvature. Radius or bending deformation, forming a twisted helical state, twisted into a wire rope

This method has high requirements on the precision and adjustment accuracy of the pre-deformer, and the work efficiency is low; The intermediate roller can be moved), not suitable for larger diameter wire ropes and wire rope machines that produce different diameter ranges

[0004] In addition, steel wire ropes with metal cores can also be heat-treated to obtain non-loose properties. The steel wire ropes after the rope are heat-treated in a high-temperature furnace to eliminate internal stress. However, the existing heat treatment furnaces are mostly heated by coal. The temperature of the upper and lower surfaces of each pipe is inconsistent, and the effect of stress relief is not good; and the temperature inside the high-temperature furnace is unstable, and the surface of the steel wire rope is prone to decarburization, resulting in a decrease in the wear resistance and fatigue strength of the steel wire rope, and a shortened service life.

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