Device for two-stage constant-tension wire loading during fine wire cutting procedure of high-speed reciprocating wire-cut electrical discharge machining process

Abstract

This design discloses a device for two-stage constant-tension wire loading during a fine wire cutting procedure of a high-speed reciprocating wire-cut electrical discharge machining process. The device mainly comprises a first-stage tension regulating device and a second-stage tension regulating device, wherein the first-stage tension regulating device comprises wire clamping sheets, a wire clamping spring, a wire disc base, a magnetic damper, a tightening bolt, a regulating wrench, a magnetic attracting seat, a supporting stud, a wire pressing wheel and an electrode wire disc; and the second-stage tension regulating device comprises a tension detecting wheel, a tension regulating wheel, a screw rod sliding table module, a stepper motor and a host computer. The first-stage tension regulating process is achieved by presetting tension through the magnetic damper; through the real-time tension feedback by the tension detecting wheel, the stepper motor is controlled by the host computer todrive the tension regulating wheel to move, and then the second-stage tension regulating effect process within a certain range is achieved; the wire loading tension uniformity is guaranteed; accordingly, the device is designed to be an automatic and tension-controllable wire loading system; through the device, the phenomenon of unilateral wire loosening caused by tension non-uniformity is greatlyreduced, the situation of wire breakage during fine wire processing is reduced, and the fine wire processing stability is improved; and meanwhile, the fine wire replacement efficiency and the operation safety are improved.

Description

technical field [0001] The invention relates to the field of wire electric discharge processing equipment, in particular to a high-speed reciprocating wire electric discharge wire cutting filament cutting two-stage constant tension wire feeding device. Background technique [0002] In wire electric discharge cutting, the wire electrode and the workpiece are respectively connected to the positive and negative poles of the pulse power supply, and the workpiece material is etched by the instantaneous high temperature generated by the pulsed electric spark discharge between the workpiece and the wire electrode. Wire EDM can be divided into two forms: low-speed unidirectional wire EDM and high-speed reciprocating wire EDM according to the wire-feeding method and wire-feeding speed. The electrode wire of low-speed unidirectional wire EDM is mostly made of brass wire. During processing, the electrode wire runs in one direction at a speed of 0.03m / s-0.2m / s, and the electrode wire ca...

AI Technical Summary

Problems solved by technology

The current manual threading has problems such as low safety for the operator, difficulty in threading with uniform tension, and easy occurrence of overlapping threads.

[0004] The rigidity and strength of the thin wire below φ0.08mm is worse than that of ordinary diameter electrode wire, it is easier to be broken during the wire feeding process, and the wire feeding is more difficult

The existing damper-type wire feeding device cannot handle the tension change caused by the reduction of the thickness of the wire plate electrode wire during the wire feeding process, which aggravates the loose wire on one side, and the uneven tension of the feeding wire aggravates the filament cutting. The probability of wire breakage affects the durability and processing efficiency of the electrode wire

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