A wire cutting tensioning device

Abstract

The invention discloses a wire cutting tensioner, comprising a support plate; bosses R, P, T, S and M are fixed on the support plate; the bosses R and P are adjacently arranged and are arranged at the opposite side of the boss T; the bosses M and S are symmetrically located at one ends of strip-shaped straight slots, formed at two sides of the boss T, of the support plate; the support plate is provided with a tension sensor between the bosses R and P; two ends of the tension sensor are respectively connected with a sensor pulley A and a sensor pulley B on the bosses R and P respectively by threads; screw rods are arranged between the boss T and the bosses R and P; the boss T is connected with a step motor arranged on the support plate; the screw rod is connected with a movable nut of which two ends are provided with a movable pulley A and a movable pulley B respectively; the movable pulleys A and B are rightly located in the strip-shaped straight slots of the support plate; the bosses S and M are respectively provided with a fixed pulley A and a fixed pulley B respectively; the fixed pulley A and the movable pulley A as well as the fixed pulley B and the movable pulley B are arranged on the same straight line respectively. The wire cutting tensioner is applied to a cutting lathe, so the service life of a molybdenum wire is prolonged.

Description

technical field [0001] The invention relates to a tensioning device, in particular to a wire cutting tensioning device. Background technique [0002] Fast wire cutting uses a continuously moving thin metal wire as an electrode to perform pulse spark discharge on the workpiece to etch the metal to achieve cutting and forming. Most of the electrode wires of cutting machine tools use molybdenum wires, which need to be routed repeatedly, and the tightness must be controlled during the routing. Too loose or too tight electrode wires will affect the quality of wire cutting. The tensioning device used to adjust the tightness of molybdenum wire recorded in the prior art is such as a Chinese invention patent named "A Wire Tensioner for Cutting Machine Tool" and the application number is "201020238893.0", which discloses a cutting machine tool. The thread tightener includes a lower fixing base and a plurality of guide posts arranged on the lower fixing base. The top of the guide post...

AI Technical Summary

Problems solved by technology

With the tensioning device of this structure, when the machine tool is not working, the molybdenum wire will always be in a tensioned state under the action of the spring tension, which will make the molybdenum wire longer due to plastic deformation, thereby reducing the service life of the molybdenum wire; At the same time, this device can only be used for tensioning on one side, which will make the tension received by the molybdenum wire uneven, which will cause processing errors

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