Two-stage tension control device for wire cut electrical discharge machining

Abstract

The invention relates to a two-stage tension control device for wire cut electrical discharge machining. The two-stage tension control device comprises a wire storage cylinder, a heavy hammer tensioncomponent, a first wire arm and a second wire arm, which are sequentially connected in series and form a closed wire conveying loop; the first wire arm and the second wire arm are the same in structure, and are symmetrically arranged at the two ends of the heavy hammer tension component; a first spring tension component and a second spring tension component, which have the same structure, are separately arranged on the first wire arm and the second wire arm; the first wire arm is connected with the heavy hammer tension component through the first spring tension component; and the second wire arm is connected with the heavy hammer tension component through the second spring tension component. Compared with the prior art, the two-stage tension control device has the advantages of no single edge wire loosening, high machining quality, high precision, long service life of an electrode wire and the like.

Description

technical field [0001] The invention relates to the field of electric discharge wire cutting processing equipment, in particular to a secondary tension control device for electric discharge wire cutting. Background technique [0002] In the process of high-speed reciprocating wire EDM processing, on the one hand, the electrode wire is in a high-temperature state of spark discharge, which will be heated and stretched, and the loss will become thinner. Therefore, the electrode wire will elongate and become loose as the processing time continues. On the other hand, the electrode wire is driven by the wire storage cylinder to move forward and reverse. After a period of processing, the electrode wire will gradually appear on the wire storage cylinder with one end loose and one end tight, commonly known as "unilateral loosening". Wire” phenomenon, and the tension of the electrode wire is an important factor affecting the spatial position of the electrode wire, and the problem of i...

AI Technical Summary

Problems solved by technology

However, the energy storage stroke of the spring is small. Since the tension energy comes from the elastic force of the spring, the elastic deformation and yield force of the spring will also change due to the comprehensive influence of the service time and environmental factors, resulting in uneven tension, which leads to tension. The tension slider is abnormally unstable or temporarily stagnant, causing unilateral loose threads; in addition, the tension slider in the mechanism is supported by the suspension of the guide rod. When the slider moves to the left end, it is easy to shake or swing, causing tension. Tension wheel jumps, resulting in lapping failure

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