Research on Lightweight Precision Manufacturing Process of Motor Shaft for New Energy Vehicle

Abstract

In order to realize the composite extrusion molding of the motor shaft, this paper adopts composite extrusion, analyzes its theoretical feasibility, and calculates the reasonable process parameters by calculating the cold extrusion force. The motor shaft is an important part of the automobile transmission, and cold extrusion is an advanced processing method that can be used to manufacture the motor shaft. The motor shaft's material is made of alloy structural steel 20MnCr5, which can be lightweighted to reduce the car's weight. This technique can not only save battery costs and extend range, but it also more effectively reduces the loss of new energy vehicles during operation. The forming force of the composite extrusion of the motor shaft is determined empirically by examining the flow law of the cold extrusion forming process. In order to create the molds, including the combined concave and convex molds, and to model them in three dimensions, the properties of the parts and the dimensions of the cold-extruded parts are analyzed. Additionally, this design uses DEFORM software to optimize and simulate the cold extrusion forming process of an automotive transmission motor shaft. The quality and performance of the workpiece are enhanced by improving the machining settings through the analysis of the metal flow.The vehicle transmission motor shaft part is extruded utilizing the composite extrusion forming method, a convex die, and a combination concave die, together with a suitable intermediate preform for the cold extrusion forming process.