Manual adjustable tension wire tightening mechanism

Abstract

The invention discloses a manual adjustable tension wire tightening mechanism. The manual adjustable tension wire tightening mechanism comprises a wire cylinder, an electrode wire, an upper guide wheel, a lower guide wheel, a working table, a beam and a wire tightening device; one end of the 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 is wound on the wire cylinder and is fixed at the right end of the wire cylinder after sequentially passing through the upper guide wheel, the wire tightening device and the lower guide wheel; the wire tightening device is arranged on the beam; the beam is arranged on the working table; the wire tightening device comprises a wire tightening guide wheel, an oscillating bar, an oscillating bar connecting pin, a bracket and a counter weight; the rotatable wire tightening guide wheel is arranged at one end of the oscillating bar; the position of the oscillating bar, which is close to the wire tightening guide wheel, is movably connected to a bracket by the oscillating bar connecting pin; the bracket is arranged on the beam by a screw; and the movable counter weight is inserted at the other end of the oscillating bar. By the mode, the manual adjustable tension wire tightening mechanism has simple and practical design structure, is convenient to manufacture, is reliable to install and is flexible to use; by regulating the tension of the linear cutting electrode wire, the loss caused by the loosening and shaking of the electrode wire is avoided, the surface roughness of a cut workpiece is improved and the production efficiency is improved.

Description

technical field [0001] The invention relates to a wire electric discharge machine tool, in particular to a manually adjustable tension wire tightening mechanism. 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 shaking of the wire can also cause a short circuit, resulting in cutting pauses or blown electrode wires, which greatly reduces 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 exception are that the wire tightening mechanism forms a loop with the wire-feeding system and ...

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 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

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