SU1234114A1 - Electrode unit for resistance spot welding - Google Patents

Description

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The invention relates to mechanical engineering, in particular to the production of electrode assemblies for resistance spot welding.

The aim of the invention is to increase the operational reliability by providing optimum cooling conditions for the electrodes,

FIG. 1 shows the electrode unit, section; in fig. 2 — node 1 in FIG. triangular protrusion; in fig. 3 - the same protrusion in the form of a trapezoid.

The electrode assembly contains an electrode 1 with a water-cooled channel, inside which is placed a tube 2 for supplying a cooling fluid. The flat-faced end of the tube 2 is complete with the protrusions 3 forming, with the bottom surface, an opening A for passing the coolant. The protrusions can be made in the form of isosceles triangles or trapezium, abstracted by a smaller base to the bottom surface of the channel. The end of the protrusion tube 2 rests on the bottom of the water-cooled channel. The opposite end of the tube is made with a shoulder on which the spring 5 is supported, mounted in the housing 6.

Electrode site works as follows.

Under the action of the welding current, depending on the duration of the current flow and the compression force of the electrodes, the welding electrode 1 is heated.

The cooling of the working part of the welding electrode proceeds. The rate of discharge of fluid from the cooling tube is the greater, the smaller the cross-sectional area of the holes. The higher the coolant flow rate, the better the condition of the electrode cooling and the lower the flow rate of the liquid. The total hole area is chosen to be less than or equal to the cross-sectional area of the tube, since in this case the heat generated in the electrode is removed with the minimum flow rate of coolant.

When the worn electrode 1 is removed, the cooling tube 2 is pulled out of the housing 6 by the action of the spring 5.

When a new electrode is installed, the cooling tube 2 is inserted into the water-cooled channel of the electrode, the flat-treated end of the cooling tube 2 with the protrusions 3 is pressed to the bottom of the water-cooled channel of the electrode 1, ensuring the installation of the electrode by compression of the spring 5.

The use of the invention provides optimal conditions for cooling the working part of the electrode, which increases operational reliability and reduces the complexity of their maintenance. The laboriousness of replacing the electrode by simplifying the installation of the water-cooled tube and eliminating the operation of monitoring its position is reduced to 5 minutes per electrode. In addition, the use of a spring-loaded water-cooled tube with protrusions on the flat-faced end allows the use of electrodes that differ in length within the axial displacement of the tube.

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Compiled by E. Guzikov Editor M. Nedoluzhenko Tehred O. Gortvay Corrector T. Kolb

Order 2935/15 Circulation 1001 Subscription

VINILI State Committee of the USSR

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

Production and printing company, Uzhgorod, st. Project, 4

FIG. J

Claims (1)

ELECTRODE KIT FOR CONTACT SPOT WELDING, containing an electrode with a water cooling channel, inside of which there is a tube for supplying a cooling liquid, the end of which is made with protrusions forming holes for the passage of coolant with the bottom surface of the channel, characterized in that, in order to increase operational reliability by providing optimal conditions for cooling the electrode, the protrusions are made in the form of isosceles triangles or trapezoids, facing a smaller base to the bottom surface of the water cooling channel, and the total area of the holes is less than or equal to the cross-sectional area of the tube. A 3 ω 1234