SU1673345A1 - Apparatus for resistance butt welding - Google Patents

Abstract

The invention relates to process equipment and devices for micro-welding and can be used in instrument-making, electronic and electrical industries. The purpose of the invention is to improve the quality of welding by ensuring the stability of the forces on the electrodes and increasing productivity. The device comprises a housing, spring-loaded movable electrode assemblies, which are installed with the possibility of interaction with the eccentric movement mechanism. The device contains groups of electrode assemblies that alternate with each other. Some electrode nodes have electrodes in the form of a beam. Each electrode has the ability to press to the contact protrusions of the strap attached to the housing. The movable electrodes are mounted on sliders placed on rolling pins and spring-loaded. The eccentric is made in the form of a roller with annular grooves. The platen is made flats. 1 hp f-ly, 6 ill.

Description

The invention relates to process equipment and devices for micro-welding of the leads of resistors with drives and can be used in the instrument-making, electronic and electrical industries.

The purpose of the invention is to improve the welding quality by ensuring the stability of the force on the electrodes and increasing the productivity.

Figure 1 shows a device for contact micro-welding, a general view; figure 2 - section aa in figure 1; on fig.Z - section bb in fig. 1: in FIG. 4 — view B in FIG. 3; in fig. , 5 and 6 is an example of welded resistors.

A device for contact micro-welding, for example, resistor leads, comprises a housing 1, slides 3 mounted on rolling pins 2, on which movable electrodes 5, made in the form of a rocker arm, are attached to the axes 4 and connected to the housing springs 6, fixed in the housing 1, slides 8 and 9 are placed on which movable electrodes 12 and 13 are mounted with screws 10 and 11, having grooves 14, 15 and interconnected by tension springs 16. On the housing 1 is fixed the strap 17, through which the rolling pins 2 and 7 are passed. The slat 17 has contact lugs 18 and 19. For movable

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electrodes 5, 12, 13 and the strap 17 are connected to the current leads 20-23. In the housing 1 perpendicular to the direction of movement of the moving electrodes 5, 12 and 13, an eccentric is installed, made in the form of a roller 24, equipped with a handle 25. On the roller 24 there are annular grooves 26 and 27 under the sliders 3.8 and 9. In the grooves 26 on the roller 24, there are flats 28, and in the grooves 27 there are diametrically located flats 29 and 30.

A device for resistance welding of resistor leads operates as follows.

In the initial state, the roller 24 is rotated to the position when the electrodes 5, 13 and 12 are separated. Pins 31 of the resistors to be welded are inserted into the gaps. With the handle 25, the roller 24 is rotated to the position where the flats 28, 29 and 30 of the roller 24 are located opposite the sliders 3.8 and 9. At the same time, the electrodes 5, 12 and 13 and the protrusions 18 and 19 will be pressed under the influence of the springs 6 and 16 resistor terminals 31, followed by welding.

At the end of welding, the roller 24 is turned to its original position with the handle 25, the welding resistors are removed, and the New ones are installed instead.

The proposed device provides an increase in labor productivity, since the leads of a group of resistors can be simultaneously clamped (or released) in one motion. In this case, the force of compression of the electrodes is provided, due to the presence of calibrated expansion springs connecting one electrode to each other, and the other to the case of the device.

The device for contact micro-welding is simple and convenient to maintain, the working electrodes have an uncomplicated configuration, their quick change is ensured if necessary. In addition, the electrodes allow multiple cleaning of the contacting surfaces, which increases the service life of the device.

Claims (2)

1. A device for contact micro-welding, mainly of resistor leads, comprising a housing, electrode nodes fixed therein, kinematically associated with an eccentric displacement mechanism, and current leads, distinguished by the fact that, in order to improve the quality of welding, by ensuring the stability of compression force and productivity, the device provided with a plate with holes and contact protrusions mounted in the housing; some electrode assemblies are made as mounted on rolling pins with the possibility of moving the sliders on Electrodes, which are made in the form of rocker arms and spring-loaded relative to the body, are fixed by means of axes; other electrode units are made in the form of two sliders facing each other and not each of which are fixed electrodes mounted on rolling pins; electrode nodes are placed in body through one, with the electrodes located opposite the respective contact protrusions of the bar, the rolling pins are passed through the holes in the bar that is connected to the current supply s, and the eccentric movement mechanism is designed as a roller with annular recesses in which to cooperate with it are sliders electrode assemblies. 2. The device is pop.1, characterized by the fact that on an eccentric in places of annular grooves under the slide of electrodes in the form of a rocker arm are made on one bald spot, and in the others - on two faces. BUT . b 1n 13 22 FIG. 2 -2 / Fig 3 Vid FIG A FIG. 6