Multiunit wire-cut electrical discharge machining method and combined machine tool

Abstract

The invention discloses a multiunit wire-cut electrical discharge machining method and a combined machine tool. The combined machine tool comprises an operating platform and more than two wire-cut electrical discharge machining units, wherein the wire-cut electrical discharge machining units are arranged around the operating platform; each wire-cut electrical discharge machining unit comprises a control device, a transmission mechanism and a wire-cut device arranged on the transmission mechanism; the transmission mechanism comprises an upper sliding plate, a lower sliding plate, an X-direction guide rail pair, a Y-direction guide rail pair, an X-direction screw-nut pair and a Y-direction screw-nut pair; the lower sliding plate and a mounted object arranged below the lower sliding plate as well as the upper sliding plate and the lower sliding plate are respectively connected by one guide rail pair; the two screws of the two screw-nut pairs are respectively arranged on the mounted object and the lower sliding plate, the two nuts are respectively arranged on the lower sliding plate and the upper sliding plate, and the two screws are respectively connected with a servo motor thereof; the wire-cut device comprises wire storage cylinders, a wire frame, an upper wire arm, a lower wire arm, a guide roller and a wire electrode, the upper wire arm and the lower wire arm are fixed on the wire frame, and each wire storage cylinder is respectively connected with a servo motor thereof; and each servo motor is connected with the control device of the wire-cut electrical discharge machining unit thereof. The method and the combined machine tool disclosed by the invention have the advantages of low cost and power consumption, high product precision and high machining efficiency.

Description

technical field [0001] The invention relates to a multi-unit electric discharge wire cutting processing method and a combined machine tool. Background technique [0002] With the continuous improvement of the national manufacturing level, the bottleneck of some large-scale parts processing technology has become increasingly prominent, such as the processing of super-large gears (with a top circle of 2m, a thickness of 1m, and a modulus of more than 60). The processing method, first, equipment and tools are hard to find, even if they are expensive, the cost is high; second, the loss of the tool after long-term processing is relatively large, resulting in poor precision and smoothness of the product; third, the workpiece needs to be machined For large workpieces, the energy consumption of the machine tool is very high; Fourth, for workpieces that require heat treatment, due to the high hardness of the material after heat treatment, the cutting method cannot be applied, and the...

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Problems solved by technology

[0002] With the continuous improvement of the national manufacturing level, the bottleneck of some large-scale parts processing technology has become increasingly prominent, such as the processing of super-large gears (with a top circle of 2m, a thickness of 1m, and a modulus of more than 60). The processing method, first, equipment and tools are hard to find, even if they are expensive, the cost is high; second, the loss of the tool after long-term processing is relatively large, resulting in poor precision and smoothness of the product; third, the workpiece needs to be machined For large workpieces, the energy consumption of the machine tool is very high; Fourth, for workpieces that require heat treatment, due to the high hardness of the material after heat treatment, the cutting method cannot be applied, and the scope of its use is limited; if wire cutting is used , the currently commonly used wire electric discharge machine tool includes a workbench, a transmission mechanism installed under the workbench, a set of fixed wire-feeding devices, and a control device. The transmission mechanism includes upper and lower plates, X-direction and Y-direction The guide rail pair and the X-direction and Y-direction screw-nut pairs, the lower plate and the installation below it and the upper and lower plates are respectively connected through a set of guide rail pairs. The two screw rods of the two screw-nut pairs are respectively Set on the installation and the lower plate, two nuts are respectively set on the lower plate and the upper plate, and the two screw rods are connected with their respective servo motors; the wire feeding device includes a wire storage tube, a wire rack, and an upper wire The arm and the lower wire arm, the guide wheel and the electrode wire, and the wire storage cylinder are connected with their respective servo motors; each servo motor is connected with the control device; when in use, the control device controls each servo motor, and the worktable drives the workpiece to move forward through the transmission mechanism. For the movement, the wire electrode moves back and forth through the rotation of the wire storage cylinder to complete the wire cutting process of the workpiece. However, for large workpieces, since there is only one set of wire feeding device, the processing efficiency is low, and the large workpieces must be fed Exercise requires high energy consumption

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