Pierced type master slice of radiator of internal combustion engine and processing method thereof

Abstract

The invention relates to a master slice of a radiator core of an internal combustion engine, particularly to a pierced type master slice of a radiator of an internal combustion engine and a processing method thereof. A plurality of mounting holes which are formed by stretching and piercing are uniformly distributed in the length direction of the master slice, each mounting hole is welded to a high-frequency welded pipe by brazing, and a solder coating is arranged on the cross section of each mounting hole. The processing method comprises the following steps: the master slice is placed on a concave die of a punching machine, one side, which is provided with the solder coating, of the master slice, faces the concave die, and a convex die is used for stretching the master slice, so that the mounting hole part of the master slice extends towards the direction of the concave die until the mounting hole part of the master slice, deformed by stretching, is pierced, and the pierced type mounting holes are formed. The mounting holes in the master slice provided by the invention are formed by stretching and piercing, the linear segments of the mounting holes are lengthened, the matching area of the mounting holes and the high-frequency welded pipe is enlarged, the strength after brazing is good, and the problem of leakage in pipe roots caused by poor welding strength of the radiator after brazing due to limit of the structure of the master slice is solved.

Description

technical field [0001] The invention relates to a core main piece of an internal combustion engine radiator, in particular to a punctured main piece of an internal combustion engine radiator and a processing method thereof. Background technique [0002] The radiator is an important part in the cooling system of the internal combustion engine. If the cooling is not good, the leakage will directly affect the life of the internal combustion engine, and even the failure of the cylinder will appear; and the main plate is an important part of the radiator core. Brazing strength directly affects sealing and reliability. Therefore, the design of the main film is of great significance. [0003] At present, the structure and installation of the main sheet of the aluminum-plastic internal combustion engine radiator are as follows: Figure 1~4 As shown, the main piece 1 and the high-frequency welded pipe 2 are assembled and brazed. After brazing, the solder 3 formed by melting the sold...

AI Technical Summary

Problems solved by technology

But because the mounting hole 12 of the traditional main sheet 1 is formed by punching, the section 5 of the mounting hole 12 has no solder cladding 4; A small amount of connection, there are problems such as small welding surface and poor connection strength, which may easily cause the solder of the main core of the car to crack and fall off and the radiator to leak when the car is driving on bumpy road conditions

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