Method for machining ball screw electric power steering machine rack

Abstract

The invention relates to a method for machining a ball screw electric power steering machine rack. The method includes the following steps that (1) a V-shaped spiral channel is cut in the surface of acylindrical screw rod; (2) the screw rod with the V-shaped spiral channel being cut is subjected to quenching treatment; and (3) the V-shaped spiral channel subjected to quenching treatment is accurately ground, a circular ball channel is ground in the inner side surface of the V-shaped spiral channel, and accordingly the ball screw electric power steering machine rack can be obtained. Compared with the prior art, machining difficulties are reduced, dependence on single procedures is distributed into other procedures, equipment utilization efficiency is improved and the utilization rate is increased; and the service life of cutters is prolonged and cost is reduced. In addition, by adoption of the machining method disclosed in the invention, the period cycle is greatly shortened, production efficiency is improved and the yield is increased.

Description

technical field [0001] The invention relates to the technical field of automobile steering systems, in particular to a processing method for a rack of a ball screw electric power steering machine. Background technique [0002] Automobiles have been developed for more than a hundred years. Automobiles are no longer pure mechanical metal products. Behind them is the embodiment of a country's technological strength. It is related to machinery, electronic technology, material applications, IT, intelligence, green environmental protection and All in one comprehensive product. With the development of the times and the advancement of science and technology, the automobile steering system is steadily increasing with each passing day. We are vigorously innovating and striving to create a steering system with superior performance, high comfort, more economical and more environmentally friendly. [0003] Today's automobile steering system is divided into two types: mechanical steering...

AI Technical Summary

Problems solved by technology

[0004] However, due to the high precision and material requirements of each component of the whole system, the processing is difficult, especially the processing of the rack screw ballway

In the existing rack screw fairway, in order to ensure the depth of the quenched layer of the fairway after grinding and the amount of deformation after quenching, the rod part is quenched first and then the fairway is machined. The energy consumption of the equipment is high, and the surface hardness is relatively hard. When performing superfine grinding of the fairway, the grinding area is large, the tool material requirements are high, the life is short, difficult to grind, the production capacity is low, and the overall cost is high.

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