A processing method for a rack of a ball screw electric power steering machine
A technology of electric power steering and ball screw, which is applied in the field of automobile steering system, can solve the problems of high energy consumption of quenching equipment, high requirements for tool materials, and large grinding area, so as to improve quality and production efficiency and reduce grinding The effect of reduction of allowance and grinding area
Active Publication Date: 2021-05-18
上海格尔汽车科技发展有限公司
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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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Embodiment 1
[0028] A method for processing a rack of a ball screw electric power steering machine, comprising the following steps:
[0029] (1) Use a lathe to turn the part of the screw ballway into a 98° V-shaped spiral path, such as figure 1 , 2 shown;
[0030] (2) Use quenching equipment for surface heat treatment to form a uniform quenched layer on the surface, such as image 3 , 4 shown;
[0031] (3) Use special ball-type fine grinding equipment to grind the screw ballway to produce a circular ballway, such as Figure 5 As shown, the central angle between the two deepest surfaces where the edge of the circular fairway is embedded is 85°.
[0032] The rack prepared by the above method only needs an ordinary CNC lathe to perform rough turning on the surface of the fairway. In terms of precision, it can meet most of the turning equipment, reducing the high cost of some special machine equipment and effectively reducing the cost. The processing burden of the follow-up sequence; and...
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Abstract
The invention relates to a processing method for a rack of a ball screw electric power steering machine, which comprises the following steps: (1) cutting a V-shaped spiral path on the surface of a cylindrical screw rod; (2) cutting a V-shaped spiral path The screw rod is subjected to quenching treatment; (3) the quenched V-shaped spiral track is finely ground, and a circular fairway is ground on the inner surface of the V-shaped spiral track to obtain the ball screw electric power steering gear rack . Compared with the prior art, the present invention reduces the difficulty of processing, and the dependence on individual steps is allocated to other steps, which improves the efficiency and utilization of equipment; and improves the service life of tools and reduces costs; in addition, the present invention The advanced processing method greatly shortens the production cycle, increases production efficiency and output.
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...
Claims
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IPC IPC(8): B23P15/14
Inventor 茅佳慧
Owner 上海格尔汽车科技发展有限公司