Spherical-cage-free symmetrical type spot-welding electrode automatic grinding device

Abstract

The invention discloses a spherical-cage-free symmetrical type spot-welding electrode automatic grinding device. The spherical-cage-free symmetrical type spot-welding electrode automatic grinding device comprises a closed shell composed of a left shell (13) and a right shell (12) which are of a mirror image structure, wherein mechanical parts or all or main body parts of all functional mechanisms are arranged in the closed shell, and each functional mechanism comprises an electrode cutting and grinding mechanism, a cutting displacement control mechanism and an electrode grinding angle adjusting mechanism. According to the spherical-cage-free symmetrical type spot-welding electrode automatic grinding device, electrode consumption is reduced by 50% or above, the welding spot quality can be effectively improved, the spot welding process energy consumption is reduced, the service life of a cutting tool is prolonged by more than 10 times, the welding spot quality is further improved, the spot welding process energy consumption is reduced, the electrode replacement frequency can be reduced by 50% or above, and the process productivity can be effectively improved under the same process condition.

Description

technical field [0001] The invention belongs to the technical field of spot welding electrode grinding in the resistance spot welding process, and more specifically, the invention relates to the grinding of the electrode working ends of various automatic welding tongs or fixed spot welding machines in the resistance spot welding process. Special technical equipment for automatic grinding, especially a kind of automatic grinding device for spot welding electrode without spherical cage symmetry. Background technique [0002] During the continuous spot welding process, under the cyclic effect of high temperature and high pressure and other harsh workloads, the diameter and composition of the electrode working surface, the contact area with the workpiece surface, the contact resistance and the contact thermal resistance, etc. are continuously increasing with the number of solder joints. Changes, a series of changes dynamically change the total resistance value between the solder...

AI Technical Summary

Problems solved by technology

(3) Considering the influence of robot repeat positioning accuracy, in order to remove the metal to be scraped at the axis of the electrode, the length of the cutting edge must pass through the center of rotation of the cutting tool in design, and the cutting edge beyond the center of rotation must withstand harsh conditions such as hard extrusion during the scraping process. In this case, it is easy to cause the cutting edge to become blunt or chipped rapidly.

⑷During spot welding, under the action of electrode pressure, the electrode handle will inevitably produce a certain amount of deflection deformation, and the working surface of the electrode will produce an angle deflection with the deflection deformation, prolonging the ablation and plastic deformation of the electrode during spot welding The time of gradually increasing the actual contact area with the workpiece surface will have a negative impact on the service life of the electrode and the quality of the solder joints; the known automatic electrode grinders do not have the corresponding grinding angle compensation capability

[0008] 3. Strictly speaking, the grinding principle of the known technology automatic electrode grinder is only applicable to the electrode grinding on the linear motion fixed spot welding machine

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