Self-adaption tension control device and method of electrode wires of linear cutting machine

Abstract

The invention discloses a self-adaption tension control device and method of electrode wires of a linear cutting machine. The device comprises a rack, a wire storage cylinder, transition reversing wheels, an upper machine head and a lower machine head; the wire storage cylinder is arranged on the rack, and the upper machine head and the lower machine head are each provided with a main guide wheel; the electrode wires, wound on the wire storage cylinder, all the reversing wheels and the guide wheels form a wire winding loop, and the position, arranged between the upper machine head and the wire storage cylinder, of the rack, and the position, arranged between the lower machine head and the wire storage cylinder, of the rack are each provided with a shaft type tension sensor; each shaft type tension sensor is provided with a tension detection wheel through a bearing, and the electrode wires are wound on the two tension detection wheels to form wrap angles; each shaft type tension sensor is connected with a single chip microcomputer; two parallel guide columns and a lead screw and nut pair are arranged on the rack, and a lead screw is mounted on the rack and is parallel to the two guide columns; a servo motor is connected with the lead screw through a synchronous belt wheel mechanism, and a sliding seat is fixedly connected with the nut and is arranged on the two guide columns in a sliding manner; a tensioning wheel is arranged on the sliding seat, and the electrode wires are wound on the tensioning wheel. According to the device, tension of the electrode wires on the machining segment can be more precisely detected and adjusted, and therefore the machining quality is improved.

Description

technical field [0001] The invention relates to an adaptive tension control device and method for an electrode wire of a reciprocating wire electric discharge machine tool. Background technique [0002] Whether the tension of the electrode wire of the wire cutting machine meets the requirements is closely related to the processing quality; the existing device and method for detecting and adjusting the tension of the electrode wire usually adopts a set on the electrode wire outside the processing section between the upper head and the lower head. The tension detection wheel judges the tension value of the electrode wire at the processing section by the measured tension value, and then adjusts the tension by changing the position of the tension wheel; but because the electrode wire passes through the reversing wheel and the guide wheel, the There is friction in the middle, and there is a certain difference between the measured tension value and the tension value of the elec...

AI Technical Summary

Problems solved by technology

[0002] Whether the tension of the electrode wire of the wire cutting machine meets the requirements is closely related to the processing quality; the existing device and method for detecting and adjusting the tension of the electrode wire usually adopts a set on the electrode wire outside the processing section between the upper head and the lower head. The tension detection wheel judges the tension value of the electrode wire at the processing section by the measured tension value, and then adjusts the tension by changing the position of the tension wheel; but because the electrode wire passes through the reversing wheel and the guide wheel, the There is friction in the middle, and there is a certain difference between the measured tension value and the tension value of the electrode wire at the processing section. When the electrode wire reciprocates, the tension value detected by the sensor can only reflect the tension of one side of the electrode wire. , and the processing quality is determined by the tension value of the wire electrode in the processing section, but the tension detection wheel cannot be installed at the processing section, so this method is not accurate enough for the detection and control of the wire tension in the processing section, which affects the processing quality

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