B-shaped cooling pipe formation technique based on high-frequency welding

Abstract

The invention relates to a B-shaped cooling pipe formation technique based on high-frequency welding. The B-shaped cooling pipe formation technique based on high-frequency welding comprises a step ofrolling formation and a step of conventional formation, wherein rolling formation includes first-time rolling, second-time rolling, third-time rolling and fourth-time rolling, and conventional formation includes extrusion through rolling wheels, primary extrusion, secondary extrusion, formation, and top high-frequency welding. According to the B-shaped cooling pipe formation technique based on high-frequency welding, a plurality of rolling wheels are used for stretching, bending, extruding and shaping aluminum strips, so that flat and straight material faces and ribbed parts according to product size precision are obtained; the requirement for cost reduction is met, the requirement for heat transfer of an engine cooling system for a CNG vehicle, an LNG vehicle, a hybrid vehicle or other vehicles is also met; and the problems that in the prior art, welding is conducted after B-shaped pipes are assembled into a radiator, and consequentially, the brazing effect is poor, water leakage is likely to occur, and the rejection rate of products is high are solved.

Description

technical field [0001] The invention relates to the technical field of production of automobile radiator pipes, in particular to a high-frequency welding B-type radiator molding process. Background technique [0002] New energy vehicles such as CNG vehicles, LNG vehicles, hybrid vehicles and other vehicle engines have a greater heat load than diesel engines. Using the original cooling system, the radiator can no longer meet the requirements of the entire vehicle, so the heat transfer of the radiator must be increased area or use a new high-efficiency radiator, but in the case of a relatively compact vehicle design, it is unlikely to increase the heat transfer area if the overall size of the radiator remains unchanged. In this case, changing the heat pipe or fin The structure of is the only option. [0003] Change the structure of the heat dissipation pipe and adopt a new type B heat dissipation pipe (abbreviated as B type pipe). When the size of the radiator remains the sa...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional B-shaped tube is formed by extruding the materials on both sides of the aluminum foil through rollers, then rolling the middle part of the aluminum foil to form, then continuing to roll the two sides to form, and finally rolling to form; After being assembled into a radiator, the B-type tube is welded into a sealed tube after brazing in a brazing furnace. The disadvantage of this molding process is that the brazing effect is poor, water leakage is easy to occur, and the product scrap rate is high.

Images