High-speed reciprocating two-way servo wire tightening mechanism

Abstract

The invention discloses a high-speed reciprocating two-way servo wire tightening mechanism. The mechanism comprises a wire loading mechanism, wire cylinder mechanism and a wire arrangement mechanism arranged on a machine body of a wire cutting machine tool in sequence; the wire loading mechanism comprises a motor, and a tension wheel connected with the motor; the wire arrangement mechanism comprises two sets of connecting rod combination mechanisms arranged on the same one plane in a mirror image manner; and the connecting rod combination mechanisms comprise manual wire tightening mechanisms arranged on the same one plane for enabling electrode wires to penetrate through, automatic wire tightening mechanisms, slide mechanisms and fixed guide wheels for changing a wire arrangement direction. The mechanism realizes intelligent high-frequency real-time detection and intelligent two-way servo wire tightening, thoroughly solves the problems of single-edge wire looseness and tension of molybdenum wires of a wire cutting machine tool, overcomes the defect of different elastic degrees of electrode wires caused by manual wire loading, reduces influence on the tension of the electrode wires by manual intervention, guarantees consistent tension of the electrode wires, and reduces the operation difficulty of wire cutting staff.

Description

technical field [0001] The invention belongs to the field of wire cutting machine tools, and in particular relates to a high-speed reciprocating bidirectional servo wire tightening mechanism. Background technique [0002] Wire EDM is to use the electric corrosion effect of the pulse spark discharge between the electrode wire and the workpiece to etch the metal, so as to meet the requirements of the size, shape and surface quality of the parts. Foreign countries mainly focus on the research of low-speed unidirectional WEDM machine tools, but there are few researches on reciprocating wire-feeding mechanisms such as medium-feeding wires. High-speed reciprocating wire-cutting wire-cutting machine tool is a national product independently developed by my country. It has the advantages of good cost performance and low operating cost. "Wire walking" has greatly improved the processing technology level of my country's high-speed reciprocating wire cutting machine tools. However, the...

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Problems solved by technology

There are also some machine tools equipped with mechanical or electromechanical control thread tightening devices, but there are problems such as low frequency response, easy to tighten the thread and difficult to loosen the thread.

In addition, due to the inevitable tolerances in the manufacture of the wire drum and its moving parts, coaxiality error, bearing clearance, etc., determine the high-frequency vibration of the molybdenum wire; the taper of the wire drum is relative to the guide rail of the wire drum. Due to the parallelism and straightness tolerances of the movement of the wire frame, it also determines the low-frequency vibration of the molybdenum wire, and when the wire drum moves, these tolerances often cause the cumulative error of the molybdenum wire length, that is, at both ends of the wire storage drum There will always be a phenomenon that the tension of the molybdenum wire is tight at one end and loose at the other end

[0004] At present, the molybdenum wire tension products used in wire electric discharge cutting machines, whether they are hammer type, spring type or other methods, are only a single way to tighten the molybdenum wire, and cannot correct and stabilize the tension, so it cannot really solve the molybdenum wire tension. question

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