SU1227386A1 - Method of resistance butt welding - Google Patents

Description

The invention relates to butt welding, in which a liquid phase is formed, displaced into a burr, and can be used in the production of chains by the method of contact resistance welding, as well as resistance 1,

The purpose of the invention is to improve the quality of welded editions and labor productivity by eliminating brewing between themselves or in the heat-welded zone of the parts to be removed of the welding flash.

The drawing shows a circuit for carrying out the proposed method.

The drawing shows the section of the welded link 1, the electrodes 2, the secondary circuit of the welding transformer 3 and schematically shows the solid part of grata 4 in the form of a circle concentric to the cross section of the welded link 1, as well as the liquid part 5 of grat 4. Arrows A and B indicate the possible direction of air movement streams cooling the liquid phase of grata by means of an arrow tracking system are carried out at once.

From the welding position, the link is guided to the deburring position, where its

5, clamping and directing a stream of air or nitrogen to the liquid part of the flash, arrows A and B. Cooling is carried out to a temperature of 1000-1250 C, i.e. to the temperature of the remaining part of the grata, at which the metal does not undergo allotropic changes. For each gauge to be welded, the cooling mode should be selected - gas nozzle pressure, blowing time. So for

15 chain links of 18 x 64 mm is enough pressure of compressed up to 5 amu of air coming out of two tubes with an internal diameter of 8 mm, acting on the cooled metal for 1-1s5 s,

20 After that, the burrs are removed mechanically: they cut off with a single cutter a little more than half of the perimeter, a part of the burrs, after which they cut off the remaining

Shuyus part of the bur by another cutter. When B is the direction of movement of the liquid 25 this temperature of the 1000-1250 C phase of the welded joint, under the action actually allows the welding of electromagnetic currents of the welding semi-ring or their clamping from the naked transformer. .three heat wave zone.

Compiled by Iofelitsin Editor E. Kopcha Tehred N. Wonkalo Proofreader E. Sirohman

Order 2247/14 Circulation 1001Subscription

VNSHSHI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. 4/5

-Production and printing company, Uzhgorod, ul, Proektna, 4

Follow-up of the OS manual is carried out at once.

From the welding position, the link is guided to the deburring position, where its

clamping and directing a stream of air or nitrogen (arrows A and B) to the liquid part of the stream. Cooling is carried out to a temperature of 1000-1250 C, i.e. to the temperature of the remainder of the flash, at which the metal does not undergo allotropic changes. For each gauge of the link to be welded, a cooling mode should be selected - gas nozzle pressure, blowing time. So for

chain links of 18 x 64 mm is enough pressure compressed to 5 MPa of air coming out of two tubes with an internal diameter of 8 mm, acting on the cooled metal for 1-1s5 s,

After that, the burrs are removed by mechanical means: they cut several more than half of the perimeter with one cutter, a part of the burrs, after which the remaining

Claims (2)

1. METHOD OF CONTACT BUTT WELDING, mainly of chain links, including mechanical, with the help of cutters, removal of hot burr, part of which is displaced by the electromagnetic field of the welding transformer in the opposite direction from it and has a higher temperature than the main part, characterized in that , in order to improve the quality of welded products and labor productivity by eliminating brewing between each other or in the heat-affected zone of the removed parts of the welding tool, before removing the tool part of it displaced in Counterface side of the welding transformer, cooled to temperature of the main body. 2. The method according to π. 1, with respect to the fact that cooling is carried out with compressed air. / IN h V V? "