SU142362A1 - Device for argon-arc welding - Google Patents

Description

The proposed device for argon-arc welding of the contacts of the ignition coil is applied to the known mud of argon-arc welding units containing welding heads with an electrode clip, a contact block for sealing the product and a current lead, a source of welding current with an oscillator, and a protective gas supply system.

The main feature of the device constituting the subject matter is that the welding heads are supplied with tubular tips adjacent the contact strip and forming a closed space in the welding zone from which the exhaust gases exit to the channels in the contact connector.

The use of such tubular tips results in a reduction in the flow of shielding gas and an increase in the quality of welding.

The presence in the proposed device of two planes of welding heads mounted on a pivot stand so that one pair is in operation and the second is in reserve ensures its uninterrupted operation. The overhang of the electrodes in each of these heads is controlled by a disk nut and screw, allowing the electrode to be precisely positioned with respect to the product.

FIG. 1 shows a vertical section of a part of the device proposed: FIG. 2 is a view along arrow A in FIG. one; FIG. 3 - one pair of welding torches in a section.

At each of the ends of the crosshead / (figs. 1 and 2) mounted on the swivel arm 2 mounted on the base 3, a pair of welding heads 4 is mounted. The axes of the tungsten electrodes 5 of these heads (fig. 3) must coincide with the axes of the clamps 6 7 ignition prepared for welding. The roller is considered finished for welding in the case when it is installed appropriately in the self-aligning contact block 8, mounted on the bed plate.

142362-2 Argon from the cylinder through the rotameter and the nozzle 9 enters the burner, in which it washes the electrode 5, and the contact of the ignition coil and then goes to the atmosphere through the channel 10 in the terminal block 8.

In order to reduce argon consumption, the coil covers stitches from soot and operator’s vigilance from the ultraviolet rays of the electric arc, the burning of the latter took place in a closed space formed by a ceramic tubular tip // adjacent to terminal block 8.

The normal position of the tungsten electrode in the head is determined by a distance of 1-1.5 mm between it and the clip of the coil, which is made according to the upper tolerance. Since the height tolerance for the clamps varies within 1 mm, this distance can vary between 2-2.5 mm.

The coarse adjustment of the distance between the electrode and the clamp is carried out by pressing the collet, which, when lowered, releases the electrode and allows its installation in the desired position. The fine adjustment of the gap between the electrode and the clamp of the dryer is done with a disk nut by changing the position of the collet in the head body.

In the event of a breakdown or combustion of the electrode in one or both heads, the work on the installation is stopped for a very short time, i.e. the time required to rotate the stand through 180 ° in order to put into operation a second pair of heads prepared for work.

In order to start a normal work process, it is necessary to turn on the argon supply, the high frequency generator (oscillator) is common for two electric arcs and the source of welding current. .

The described device is implemented at the ATE-2 plant.

Subject invention

Claims (4)

1. An argon-arc welding device for the contacts of the ignition coil containing welding heads with a clip for an electrode, a terminal block for fixing the product and supplying current, a source of welding current with an oscillator and a system for supplying protective gas, in order to reduce consumption shielding gas and improving the quality of welding, the welding heads are equipped with tubular tips adjacent to the contact block and forming in the welding zone a closed space from which exhaust gases flow through the channels contact block. 2. A device according to claim 1, characterized in that, in order to ensure an accurate installation of the electrode with respect to the product, the welding heads are provided with cup nuts and screws for controlling the overhang of the electrode. 3. The device according to paragraphs. 1 and 2, characterized in that, in order to ensure uninterrupted operation, it comprises two pairs of welding heads mounted on a turntable such that one pair is in operation and the second is in reserve. 4. The device according to claim 1, characterized in that, in order to ensure the simultaneous ignition of two electric arcs, one oscillator is used.