Spot welding device for direct current brushless motor circuit board and spot welding method therefor

Abstract

The invention discloses a spot welding device for a direct current brushless motor circuit board and a spot welding method therefor. The spot welding device comprises a base; a vertical plate is fixedly provided on the tabletop of the base; a spot welding platform, a circuit board mounting platform and a vertical guide platform are provided on the surface of the vertical plate in sequence from topto bottom; a welding gun is fixedly provided on the spot welding platform; a fixture mounting frame is fixedly provided on the circuit board mounting platform; a third cylinder is fixedly provided onthe vertical guide platform; and a piston rod of the third cylinder is fixedly connected to the bottom surface of the fixture mounting frame. In the spot welding process, the spot welding is performed on the direct current brushless motor circuit board by the welding gun; and after the welding gun completes the spot welding for one clamping platform, a fourth motor drives a rotation disc to rotate for 90 degrees to implement the spot welding of the direct current brushless motor circuit board on another clamping platform on the rotation disc; and the operation is sequentially circulated, so that the fixture mounting frame can implement synchronous operation of clamping and spot welding, and the spot welding efficiency of the direct current brushless motor circuit board is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of spot welding of circuit boards, in particular to spot welding equipment and a spot welding method for circuit boards of DC brushless motors. Background technique [0002] Brushless DC motor is a kind of permanent magnet synchronous motor, not a real DC motor, referred to as BLDC in English. Different from brushed DC motors, brushless DC motors do not use mechanical brush devices, but use square wave self-controlled permanent magnet synchronous motors, replace carbon brush commutators with Hall sensors, and use NdFeB as permanent magnet materials for rotors , Compared with the general traditional DC motor in performance, it has great advantages. The brushless DC motor uses semiconductor switching devices to realize electronic commutation, that is, electronic switching devices replace the traditional contact commutator and brushes. It has the advantages of high reliability, no commutation spark, low mechan...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the limitations of spot welding equipment in the spot welding process of DC brushless motor circuit boards, different sizes of DC brushless motor circuit boards need to be clamped with a separate clamping table for clamping, which is time-consuming and laborious, and the existing DC Spot welding equipment for brushless motor circuit boards can usually only perform spot welding on a single DC brushless motor circuit board, and the spot welding efficiency is low

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