SU69372A1 - Device for automatic welding of pins, hairpins, etc. parts - Google Patents

Description

The subject of this invention is a device for the automatic welding of pins, pins, etc. of parts by the resistance method. A distinctive feature of the proposed device is that it is made in the form of a pneumatic riveting hammer attached to the barrel, equipped with two electrodes: movable, driven from the hammer striker and welding the stud, and fixed to the previously welded stud. Circuit welding current through this pin.

The invention is explained in FIG. 1, which shows a longitudinal section of the proposed device, worn on the end of a pneumatic riveting hammer; FIG. 2 shows a diagram of the device.

As noted above, the device is a nozzle attached to the barrel 1 of a pneumatic riveting hammer (KM). Fastening is carried out with the help of a sleeve 2, screwed onto the end

stem / CM, as is done in the embodiment shown in FIG. 1, or with locking bolts. The nut 3 is screwed on the hub 2.

Inside the device 4, the fixed and movable electrodes are mounted. The first one is formed from tube 5, base 6 and replaceable part 7 attached to tube 5 by means of sleeve 8, which forms the sliding bearing for guide rod 9, loaded 10, Base B is located in the cylindrical insulator 77 (porcelain), and tube 5 - in the electrically insulating sleeve 72 (fiber or the like).

The movable electrode 13 is planted on the spring 14 and inside it there is a rod 75, which is the end part of the crimping 16, located inside the axle box 17 KM and exposed to strikes of the striker 18.

The graphite inserts prevent the end from burning.

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part of the movable electrode and provide the ability to change and attach the main part of the electrode.

An end electrically insulating ring 27 (a fiber, etc.) is located between the nut 3 and other parts, and an insulator 22 of the same material separates the conductor 19 from the sleeve 2. The end and side insulators in which the conductive parts They are designed and arranged in such a way that they circulate cooling air that washes the entire surface of the power busbars and electrodes. For this purpose, insulators 27 and 71 are provided with channels 23 and 24. For cooling, exhaust air supplied from the CM is used along the path indicated by the arrow 23. The current is supplied by cable 26.

Using the described device, it is possible to perform riveted-welded joints by resistance welding, for example, as shown in FIG. 1, welding the studs 27 to the sheets 28, joining the sheets by installing a rivet, etc. into the hole made in one of the joined sheets, and welding this rivet to the other sheet. In order to automate the feeding of the studs, an appropriate adaptation such as a box-type cage, which feeds the studs to the electrode 73 through a side cut in its end portion, can be used.

The electromagnet 29 acting on the trigger 30 of the air valve and the manual current switch 31 are mounted on the handle KM. The electromagnet 29 is blocked through a contactor 32 (Fig. 2) with a chopper 33 ,. performing automatic switching on and off of the welding current source.

In operation, the side electrode is mounted on the previously welded pin 27. Another pin is held in electrode 73. The welding current is passed from one of electrodes 7 and 13 to the other through studs 27 and sheet 28 (shown by a dotted line in Figure 2). At the proper time to turn on the current, the electromagnet 29 is triggered and actuates the air system / CM. Crimp 16 transmits the required welding pressure (arrow 34 in FIG. 2) to. detail - pin 27, heated to a temperature of welding heat.

The proposed device has a low weight and is a portable hand-held tool that allows you to perform work with high productivity in the most inaccessible (for other welding machines) building sites.

Subject invention

A device for automatic welding of studs, studs, etc. of parts by the method of resistance, characterized in that it is designed as a nozzle attached to the barrel of a pneumatic riveting hammer, equipped with two electrodes, movable, driven by the hammer head and welding the stud , and fixed, mounted on a previously welded stud and used to clamp the welding current through this stud.

FIG. I