Damping mechanism for winding system of wire cutting machine

Abstract

The invention aims to provide a damping mechanism for a winding system of a wire cutting machine, which can convert the tension force and variation of the winding system of the wire cutting machine into the deformation energy of an elastic piece and a damping piece to eliminate disturbance of wire tension force during the operation of the wire cutting machine. In the technical scheme, the damping mechanism comprises a roller which is axially provided with a roller shaft, at least one vibration adsorption rod piece which is connected with the roller and a fixed base capable of fixing the vibration adsorption rod piece, and is characterized in that: the vibration adsorption rod piece is arranged between the roller and the fixed base; one end of the vibration adsorption rod piece is connected with the roller, and the other end of the vibration adsorption rod piece is connected with the fixed base; the vibration adsorption rod piece consists of a rod piece main body and a rod piece connecting part which is arranged at the connection end between the rod piece main body and the roller and can be used for connecting the roller shaft; and the rod piece main body is formed by mutually staggering, stacking and combining a plurality of elastic material pieces and at least one damping material piece.

Description

technical field [0001] The invention relates to a vibration damping mechanism which can be used for the winding system of a wire cutting machine for fine wire processing. Background technique [0002] The current wire-cut processing machines mostly process metal wires with a diameter of more than 100 μm. The winding system of the wire-cut machine includes roller groups of different sizes, such as wire supply rollers, rollers, brake wheels, and take-up wheels. During the threading process, the thread tension stability has a considerable influence on the processing quality. [0003] The wire tension control is mainly divided into two types: open loop control and closed loop control. The open loop control method is to control the torque of the brake wheel, and then run the processing after the tension reaches the set value. The wire diameter is relatively thick, so the tension disturbance is small, and most of them are open-loop designs. [0004] Another type of closed-loop t...

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Problems solved by technology

[0004] Another type of closed-loop tension control system mainly controls the torque and speed of the brake wheel and the take-up wheel, and cooperates with the tension sensor to perform feedback control so that the thread tension is stable at a tension setting value, but due to the discharge force The line disturbances are high-frequency oscillations, and active brake control alone is not enough to respond, and can only eliminate low-frequency disturbances in the system

[0005] On the other hand, due to the addition of tension sensors, the cost of the winding system will increase significantly

[0006] The stability of wire tension is the main factor affecting the accuracy of wire cutting EDM. When the wire is disturbed, it is easy to cause poor processing accuracy, especially when processing thin wires (diameter less than 100μm), unstable tension is more likely to cause wire breakage

[0007] At present, the vibration-absorbing wheel device of the winding system of the wire-cutting processing machine is only covered with elastic material on the surface of the roller, so that when the wire tension is disturbed, the material on the surface of the roller can be deformed to absorb the disturbance to absorb vibration; Or use an elastic material block to cover the wire pole to absorb the disturbance, but because the damping coefficient of the elastic material is quite limited, the disturbance energy cannot be effectively dissipated, so that the vibration reduction effect is limited; or the roller shaft is equipped with spring or rubber support , the damping of the spring and the rubber is insufficient, resulting in limited vibration absorption effect, unable to effectively remove the line disturbance and stabilize the tension

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