A large wire tightening mechanism for wire electric discharge machine tool exterior

Abstract

The invention discloses a large-wire tightening amount wire tightening mechanism outside an electrical spark linear cutting machine tool. The large-wire tightening amount wire tightening mechanism comprises a wire cylinder, a machine tool body and a wire tightening device, wherein one end of an electrode wire is wound on the wire cylinder and is fixed at the left end of the wire cylinder; the other end of the electrode wire passes through the wire tightening device to be wound on the wire cylinder and fixed at the right end of the wire cylinder; the wire tightening device and the wire cylinder are mounted on the machine tool body; and the wire cylinder can be driven to rotate and move left and right. According to the large-wire tightening amount wire tightening mechanism, the designed structure is simple and practical, the manufacturing is convenient, the mounting is reliable, the utilization is flexible, and through adjusting the tension of the cut electrode wire, the phenomena of shorting and wire breakage due to the situation that the electrode wire is loose and shakes are avoided, the surface roughness of a cut workpiece is improved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electric discharge wire cutting machine tools, in particular to a large wire tightening mechanism for the exterior of electric discharge wire cutting machine tools. Background technique [0002] As the processing time increases, the diameter of the electrode wire will become thinner and the length will become longer due to electric corrosion. When cutting, the electrode wire will vibrate due to relaxation, which will reduce the quality of the processed surface and increase the roughness. The vibration of the electrode wire will also cause a short circuit, resulting in cutting pause or blown electrode wire, which greatly reduces the work efficiency. . [0003] In order to reduce the effect of EDM caused by the slack of the electrode wire, many methods are currently used, and the more common methods are hammer type, spring type, and reversible torque motor type. All the above-mentioned methods without exc...

AI Technical Summary

Problems solved by technology

[0004] 1. The heavy hammer type is limited by space in installation, and the heavy hammer produces self-excited oscillation when the wire barrel is running, which is fed back to the system and affects the stability of cutting;

[0005] 2. The adjustment range of the spring-type tension force is small, the adjustment amount of the electrode wire is small, and the tension force is not uniform enough;

[0006] 3. The structure of the motor type is complex and the cost is high. A sudden power failure will destroy the overall tension state

[0007] In addition to the increase in processing time, resulting in a decrease in wire tension

According to the structure of the parts, there is still a skip line in the processing route. It is necessary to remove one end of the wire on the wire barrel and connect it to the next station, resulting in a gradual decrease in the tension of the wire.

In addition, the tension of the new yarn installed on the wire drum is often small, and the wire needs to be tightened before normal processing. At present, it is done manually. The screwdriver pulls the electrode wire firmly until the limit on the right end of the wire barrel, because the diameter of the electrode wire is very small, it is no less than a sharp knife under pressure, and it is easy to injure fingers without safety measures; Silk also causes inconsistent tension, making it difficult to keep tension balanced

In the process of manual thread tightening, the margin that can be pulled out often reaches 500-800 mm. The patent applied for before: a manual adjustable tension thread tightening mechanism (patent number: ZL201210239083.0), which needs to be continuously The large amount of wire tightening can only be eliminated by moving the workbench, and it is difficult to ensure a constant tension of the electrode wire with the change of the falling position of the weight. The current internal wire tightening mechanism cannot solve such problems

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