Brazing machine

Abstract

The invention discloses a brazing machine which comprises a workbench and a hot air device, wherein the workbench is used for placing welded parts and a brazing material, and the hot air device is arranged in a manner of corresponding to and being separated from the welded parts and is used for generating and outputting hot air, so as to melt the brazing material to integrally weld the welded parts. In the process of welding, after the hot air device generates and outputs hot air, a thin plate and an end cap are heated to further melt solder wires attached to the welded parts, and the thin plate and the end cap are integrally welded by the molten solder wires. The brazing machine disclosed by the invention has the advantages that 1, the welded parts are heated by heating a gas with a certain temperature, thus contact between the hot air device and the welded parts is no longer needed, impressions on the welded parts by a clamping force in the prior art is avoided; and 2, the wide heating range of the hot air device results in more uniform heating for the welded parts, so deformation of the welded parts generated by centralization of heat stress after local heating is relieved and the quality of product is effectively improved.

Description

technical field [0001] The invention relates to the technical field of mechanical processing technology, in particular to a brazing machine. Background technique [0002] Brazing is a welding technique that uses solder 300°C lower than the melting temperature of the base metal, and the operating temperature is lower than the solidus of the base metal and higher than the liquidus line of the solder 300°C. [0003] In the prior art, the commonly used brazing machine is resistance brazing machine, please refer to figure 1 , figure 1 It is a working schematic diagram of a resistance brazing machine in the prior art; the following briefly describes the welding process of this brazing machine and its existing defects. [0004] Such as figure 1 As shown, the workpiece to be welded includes a thin plate 100 arranged horizontally, a plug 200 arranged at the through hole in the middle of the thin plate 100, and a solder wire is set at the contact between the thin plate 100 and the ...

AI Technical Summary

Problems solved by technology

[0006] First, because the upper electrode 1' and the lower electrode 2' must exert clamping force on the thin plate 100 during the welding process, and the thin plate 100 is soft in the heated state, and it is easy to produce indentation under the clamping force in the vertical direction defect;

[0007] Second, since the heating of the above-mentioned resistance brazing machine is concentrated in the contact area, under the effect of thermal expansion and contraction, it is easy to cause thermal stress concentration and cause deformation of the thin plate 100, which does not meet the product quality requirements

Images