Headstand type threading-free wire cut electrical discharge machining device

Abstract

The invention discloses a headstand type threading-free wire cut electrical discharge machining device comprising a workpiece clamping platform, a guide wheel support fixing plate, a wire coiling cylinder, an electrode wire, first guide wheels, second guide wheels and a plurality of electric spark guide wheel machining mechanisms. The electrode wire is wound around the wire coiling cylinder, the first guide wheels, the second guide wheels and the electric spark guide wheel machining mechanisms to form a closed loop. Meanwhile, the electrode wire is sequentially wound around the upper left circumferential face of an upper right guide wheel, the lower right circumferential face of a lower right guide wheel, the lower left circumferential face of the lower left guide wheel and the upper right circumferential face of an upper left guide wheel of each electric spark guide wheel machining mechanism to achieve 180-degree reversing. Compared with the prior art, the headstand type threading-free wire cut electrical discharge machining device has the advantages of being easy, convenient and rapid to install, reliable in use, capable of effectively improving the production efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of electric discharge machining of connecting rods, in particular to an inverted wire-thread-free wire electric discharge machining device. Background technique [0002] In the connecting rod cracking process, two stress grooves need to be machined in the axial direction at the symmetrical position of the inner wall surface of the big head hole of the connecting rod. In the prior art, processing methods such as broaching, laser, water jet, and wire electric discharge cutting are generally used. [0003] Among them, when the broaching method is used to process fine grooves, the tip of the tool needs to be sharp, so the tool is extremely prone to wear and the processing quality is unstable during the processing, so it is eliminated. The laser processing method has high efficiency and stable quality, but the high manufacturing cost and maintenance cost hinder its popularization and application. Although the w...

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Problems solved by technology

[0006] However, the above-mentioned two-way processing device for the initial stress groove of the cracked connecting rod is relatively difficult in threading. Once the wire is broken during processing, the threading will take a lot of time and affect the batch processing efficiency. The two-way processing device for the initial stress groove of the cracked connecting rod is applied to In the actual processing of the stress groove of the connecting rod, the relative lifting of the workpiece clamping table and the wire frame determines that when the connecting rod is clamped, the electrode wire guide wheel must pass through one end of the big end hole of the connecting rod and pass out from the other end. Therefore, it is cumbersome to clamp the connecting rod during batch operation, which reduces the processing efficiency, and the connecting rod is easy to collide with the wire rack guide rod of the device, which affects the grooving accuracy and even damages the wire EDM device.

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