Manufacturing method for engine assembly type camshaft

Abstract

The invention discloses a manufacturing method for an engine assembly type camshaft, and belongs to the field of manufacturing technologies of engine parts and components. Cam pieces of the camshaft are green bodies formed by pressing through powder metallurgy, gears, shaft necks and other assembly parts are powder metallurgy pressed green bodies or machined semi-finished products, a base body shaft is a hollow seamless steel tube and is connected with the assembly parts, then positions and angles of all components are guaranteed through key grooves or positioning clamps, by the utilization of the sintering shrinkage characteristic of powder metallurgy material, the powder metallurgy green bodies and the base body shaft are sintered and welded together at high temperature, and the mode that copper foil and other brazing filler metal are added is used for brazing the machined assembly parts and the base body shaft together, so that the assembly technology is completed. According to the manufacturing method for the camshaft, the powder metallurgy sintering welding technology and the common brazing technology are combined; compared with a traditional manufacturing technology for the camshaft, more materials of all components of the camshaft can be selected, the torque between the assembly parts and the base body shaft is large, the number of manufacturing steps is small, the period is short, and the manufacturing method has the advantage of obviously saving energy.

Description

technical field [0001] The invention belongs to the technical field of preparation of engine parts, in particular to a method for manufacturing an engine assembled camshaft. Background technique [0002] The camshaft is one of the five key components in the engine. It controls the gas distribution system. The performance of the camshaft directly determines the power and efficiency of the engine. The traditional camshaft is machined from a cast or forged blank, which has the disadvantages of heavy weight There are disadvantages such as low material utilization rate, long processing procedure and high energy consumption. In the 1990s, Japan, Europe and the United States began to study the hollow assembled camshaft to replace the traditional camshaft and realize industrialization. Hollow camshafts have the advantages of light weight (20%-60% lighter than traditional camshafts), high material utilization, short processing steps, less energy consumption, good wear resistance, an...

AI Technical Summary

Problems solved by technology

[0002] The camshaft is one of the five key components in the engine. It controls the gas distribution system. The performance of the camshaft directly determines the power and efficiency of the engine. The traditional camshaft is machined from a cast or forged blank, which has the disadvantages of heavy weight Disadvantages such as low material utilization, long processing procedures, and large energy consumption

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