Machining process of heavy truck casting cross beam

Abstract

The invention provides a machining process of a heavy truck casting cross beam. The machining process comprises the following steps: (S1) top surface machining: positioning grooves on two sides of a casting cross beam, three fixed points on the bottom surface and an auxiliary fixed point are used for positioning to machine an upper reference surface and holes of the casting cross beam; (S2) bottomsurface machining: the casting cross beam is fixed by one surfaces and two pins; and a lower reference surface and hole positions of the casting cross beam are machined; (S3) end surface machining: the casting cross beam is fixed by one surfaces and two pins; two end surfaces of the casting cross beam are machined; and an inclined tabletop is machined; (S4) reverse reaming: one surface and two pins are used for positioning and reverse reaming of holes on the upper reference surface, the lower reference surface and the end surfaces; and (S5) treatment after machining: burrs are cleaned; and high points around the holes are cleaned. The new machining process comprises five procedures, shortens the machining time by 3 times, is fewer in occupied manpower and equipment, and meets the divisional truck loading demands in final assembly scene. The new machining process adopts numerical control equipment, guarantees the machining precision, and guarantees the product quality.

Description

technical field [0001] The invention belongs to the technical field of machining technology of mechanical parts, and in particular relates to a machining technology for casting beams of heavy-duty trucks. Background technique [0002] Due to the weight of the cast beam is too heavy, the shape structure is complicated, and there are special-shaped surface structures, there are many processing surfaces, through holes and threaded holes, the machining process of the cast beam of the heavy truck chassis in the past is complicated, and the process is divided into 12 processes. There are many procedures, which lead to a long processing cycle. At the same time, it takes up a lot of manpower and equipment, which cannot meet the loading needs of the assembly site branch. Contents of the invention [0003] The purpose of the present invention is to solve the problems in the above-mentioned prior art, and provide a machining process for casting beams of heavy-duty trucks. The machini...

AI Technical Summary

Problems solved by technology

[0002] Due to the weight of the cast beam is too heavy, the shape structure is complicated, and there are special-shaped surface structures, there are many processing surfaces, through holes and threaded holes, the machining process of the cast beam of the heavy truck chassis in the past is complicated, and the process is divided into 12 processes. There are many procedures, which lead to a long processing cycle. At the same time, it takes up a lot of manpower and equipment, which cannot meet the loading needs of the assembly site branch.

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