SU1047636A1 - Clamping mechanism of microwelding machine - Google Patents

Abstract

A MECHANICAL MACHINE COMPRESSION MECHANISM, comprising a housing, an electrode holder connected to a movable bracket, flat springs, and a switch characterized in that, in order to improve the quality of welding, the mechanism is equipped with a pressure regulator that is complete in the form of two two shoulders spring-loaded levers, hinged on a common axis, located on a movable bracket, with the possibility of periodic interaction with one of their shoulders with the electrode holder, and the others through each other, switch, us ± a copulating on one of these levers, which in turn soedi.nen to the housing via the stop and regul.irue- IWGE pruzhiny.g

Description

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() uSodl / W The invention relates to equipment for resistance welding and is intended for use in instrument making in welding of materials of small thickness. Known is the compression mechanism of the resistance welding machine, comprising a housing, an electrode holder connected to a movable bracket, a flat spring, and a switch 1. The disadvantages of this device are the large inertia of the movable parts of the compression mechanism due to the friction of the electrode holder. The body bearings in the housing, as well as the large size and weight of the electrode holder, creates greater rest inertia of this mechanism, degrades the dynamic characteristics, reduces the quality of welding and makes unsuitable for micro-welding. The closest to the invention in technical essence and the achieved result is the mechanism of compression of the machine for contact mi-. Cross-welds, comprising a housing, an electric holder, connected to a movable arm by flat springs, and a switch 2. The disadvantages of the known mechanism are its increased inertia and low dynamic characteristics. The purpose of the invention is to improve the quality of welding. The goal is achieved by the fact that the compression mechanism of a micro-welding machine, comprising a housing, an electric holder connected to a movable arm of flat springs, and a switch, is equipped with a pressure regulator, made in the form of two two-arm mutually-spring-loaded arms, hinged on A common axis, located on the sub-carrier, with the possibility of periodic interaction, with its shoulders with the electric holder, and with the others through a switch mounted on one of these arms, to which in turn is connected to the housing by means of an adjustable stop and spindle. Figure 1 shows a diagram of the mechanism in the initial position, before welding; Fig. 2 - the same, after compressing the welding parts at the moment of turning on the welding current. The compression mechanism consists of a housing 1 with a movable fixed on it: a bracket 2, an indicator. an adjustable stop 4 and an adjusting screw 5. On the movable crown of matte 2 there is a hinge b, with the help of which are connected between the double-arm lever 7. and the double-arm lever 8. The movable arm 2 is connected to the electrode holder 9 by two flat springs 10. The double-arm levers 7 and 8 with one arm, from the side of electrode 11-, contact with electrode holder 9 through pin 12, and the other with each other through switch 13 .. This contacting is carried out with the help of adjustable stop 14 fixed on lever 8 .. It is also fixed fuse {1 stop 15, to prevent the mechanism from failing in the event of an unexpected increase, the movement of the mechanism when compressing parts. The spring 16 continuously presses the two shoulders lever 7 against the stop 4, with which the deflection of the flat springs 10 is predetermined, and hence the initial welding force. The spring 17, located between the levers 7 and 8, on the one hand, expands them and ensures that these levers are in constant contact with the pin 12. The mechanism works as follows. Adjustable stop 4 double-arm lever 7 rotate around the hinge 6 at some angle. At the same time, the left shoulder of the lever 7, overcoming the force of the spring 16, moves downwards, and the right shoulder rises up and its rightmost point, in contact with the pin 12, raises this pin. The movement of the pin 12 is accompanied by the bending of the flat springs 10. In this case, the electrode holder 9 rises upwards, and the springs 10, bending, create an initial compressive force. The amount of deflection of the springs 10, and hence the pre-compression force, is determined by the indicator 3. Then, an adjustable stop 14 sets the gap between the button of the switch 13 and this stop. This gap determines the size of the draft. After that, the parts to be welded are placed between the electrodes and the housing 1 is moved down. The electrode 11 presses the parts to be welded, and after the compressive force of the parts exceeds the force generated by the deflection of the springs 10, the electrode holder 9 moves relative to the movable bracket 2 up, the pin 12, resting on the right arm of the lever 8, turns it around the hinge 6. At This second lever arm 8, compressing the spring 17, presses the button of the switch 13 and switches on the welding current. Welding takes place and the electrode 11 moves downward while the pin 12 rests on the right lever arm 7. After welding, the housing 1 together with all the mechanism is raised And the cycle repeats.

The effectiveness of the proposed mechanism compared with the prototype; taken as the base object, improves the quality of welding due to

reducing the deformation of welded parts, improving the dynamic characteristics of the compression mechanism and using friction in moving parts.

Claims (1)

COMPRESSION MECHANISM FOR A MICROWELDING MACHINE, comprising a housing, an electrode holder connected to a movable bracket, flat rods and a switch, so that 23 K 11/10, 1975. USSR certificate 23 K 11/10, 1972 in order to increase welding quality, the mechanism is equipped with a pressure regulator made in the form of two two-shouldered reciprocal spring levers pivotally mounted on a common axis located on a movable bracket, with the possibility of periodic interaction with their own shoulders with the electrode holder, and with each other through, a switch mounted on one of these levers, which in turn is connected to the housing by means of an adjustable stop and spring