Automatic brazing process for heating disc production

Abstract

The invention discloses an automatic brazing process for heating disc production. The process comprises the following steps: (1) aluminum brazing flux pulp is prepared, and is brushed on the surfacesof a heat conducting aluminum plate and a stainless steel disc; (2) aluminum welding paste is injected in a to-be-brazed position of the heat conducting aluminum plate by adopting a glue dispensing mode; (3) an aluminum welding piece roll is punched to prepare a welding piece with a preset shape; and then, the welding piece is automatically fed to the stainless steel disc coated with an aluminum brazing flux for assembly; and (4) the heat conducting aluminum plate and an aluminum heating pipe are assembled for the first time; then, the heat conducting aluminum plate and the stainless steel disc to which the welding piece is attached are assembled for the second time; and then brazing is performed. Automatic and intelligent novel welding materials are obtained through the process, and the welding paste and the aluminum welding piece are used in the process, automatic and intelligent elements are embodied, and the process is green in operating environment, improves the brazing quality and the brazing efficiency, reduces the manufacturing cost, and really achieves the purpose of replacing workers with machines.

Description

technical field [0001] The invention relates to an automatic brazing process, in particular to an automatic brazing process for producing heating discs. Background technique [0002] In the small household appliance industry, as one of the core components of electric heating appliances, the heating plate is widely used in electric kettles, soybean milk machines, electric hot pots, coffee machines and other products. The brazing process of the heating plate is the key technology of the production of the heating plate. It uses the brazing material and the ammonia decomposition protective atmosphere tunnel furnace to weld the three parts of the aluminum heating tube, the heat-conducting aluminum plate, and the stainless steel disc in sequence. [0003] The brazing material used is powdered aluminum flux (KALF 4 -K 3 ALF 6 ) and powdered aluminum solder (Al 88 Si 12 ), based on this, the specific steps of the brazing process are: 1, prepare the aluminum brazing flux slurry ...

AI Technical Summary

Problems solved by technology

Both are soldered with the same powdered solder, it looks rough and it's hard to have the best of both worlds

[0006] 2. Powdery solder will produce dust pollution in the process of distributing; it also produces a lot of post-soldering residue, so the heating plate must be sandblasted, and sandblasting will produce dust pollution again, resulting in the operating environment of pre-processing and post-processing. Not environmentally friendly

[0007] 3. Powdered solder cannot be picked up by manipulators, only with the help of a lot of manual work, and cannot realize automatic operation

[0008] 4. The oxide skin of powdery aluminum solder is thick (the oxygen content is 900ppm), and the required aluminum flux is large, resulting in a high proportion of slag inclusions and pores in the weld, and the welding quality is difficult to guarantee

[0009] 5. It requires a lot of manpower, solder and related equipment, and the manufacturing cost is relatively high

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