SU120266A1 - Wire Insertion Machine for Electrovacuum Appliances - Google Patents

Description

The proposed machine for the manufacture of wire pins of bushings for vacuum devices refers to a known type of machine guns in which the wire to be cut is preheated and fed to the cutting site by means of a reciprocating caliper provided with clamping jaws. Like these known machines, the proposed machine has a distribution mechanism that controls the caliper, jaws, jaws holding the wire during the reverse of the caliper, and contacts for closing the wire heating circuit.

The peculiarity of this automaton is that the sponges holding the wire are mounted on a pivoting lever, which is under the influence of any tensioning device and which breaks the wire at the place of its heating.

This eliminates the dependence of the operation of the wire break mechanism on the fluctuations of the network voltage, the deviation of the wire diameter and the heterogeneity of its material.

The drawing shows the kinematic scheme of the proposed auto mat.

The motor / drives the cam shaft 2 of the four-cam distribution mechanism at constant speed, of which cam 3 serves to control the caliper 4, cam 5 to control two levers 6, cam 7 to control the jaws clamp and lever 5 to control circuit breaker in the electric current circuit.

Fist 3 feeds forward (to the left in the drawing) a support 4, in which sponges the wire is clamped. At the end of the feed, the wire is clamped in the jaws of the tearing lever 6. After that, the fist 5 moves away from the lever 9, which, through the pull 10, turns the tearing lever 6 towards the support No. 120266

port 4. Thus, the tearing lever 6, which is continuously pulled away by the tension device 11, hangs as if on a wire. The cam 8 of the chopper closes the contacts and a large current is applied to both pairs of jaws. The wire is heated by the current and broken by the tension device //. By; since the current value is set such that a rupture occurs before the return movement of the caliper starts, the voltage variation in the network, as well as deviations of the wire diameter and other factors only increase or decrease the heating time of the wire, but do not disrupt the operation of the automaton, since The heating time fluctuations do not go beyond the caliper rest time in place.

Tensioning device // can be spring, pneumatic, hydraulic or electric.

The wire is clamped in the jaws by wedges raised by holes 12 and 13 by means of levers 14 and 15. The lowering of the wedges to release the wire is made by the fist 7, which through the lever 16 rotates the pump, the shaft 17 with the levers 14 and 15. To prevent the wire when the caliper moves it backwards, it is held by the brake 18.

For the convenience of filling the wire into the machine, there is a foot pedal 19, which allows you to release both pairs of jaws at any time. The forces of the tension device 11 to the springs 12 and 13 regulate.

Subject invention

An automatic machine for making wire pins of bushings for vacuum devices by breaking a wire, preheated at the point of breaking by electric current, equipped with a distribution mechanism, controlling them: reciprocatingly moving the support, with sponges mounted on this latter and serving to clamp the wire as it feeds , sponges that hold the wire during the return stroke | Caliper, and current-carrying clamps, characterized in that, in order to eliminate the dependence of the operation of the mechanism A wire breakage caused by fluctuations in the network voltage, deviations in wire diameter and inhomogeneity of its material, said jaws holding the wire, are mounted on a pivoting lever under the influence of a pathetic device that produces a wire breakage in the place where it is heated.

Committee for Inventions and Discoveries at the Council of Ministers of the USSR Editor E. Ya. LanzburgGr. 96

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