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A processing method for electric steering gear rack

A technology of electric steering and processing method is applied in the field of auto parts processing technology to achieve the effects of improving efficiency, reducing cutting stress and improving comprehensive performance

Active Publication Date: 2017-07-07
上海格尔汽车科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art, to provide a processing method for the electric steering gear rack, and to solve the problem of the angle of the tooth surface and the accuracy of the OPD caused by the deformation of the material stress release

Method used

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  • A processing method for electric steering gear rack
  • A processing method for electric steering gear rack
  • A processing method for electric steering gear rack

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Embodiment Construction

[0021] Cooperate see Figure 1 to Figure 4 , the processing method of the electric steering gear rack of the present invention is that the driving teeth and the driven teeth at the two ends of the rack are roughly milled first, and a good margin and deformation are reserved for combined grinding; ℃ tempering, then placed in a box furnace for 560 ℃ stress relief tempering, heat preservation for 4 hours, then air cooling, multi-point automatic alignment to ensure straightness of 0.05, natural aging for 4 days, so that the internal stress of raw materials and chip stress Release to prepare for combined grinding; then clamp the rack after natural aging for 4 days on a combined grinding machine; carry out combined grinding of active teeth and driven teeth to meet the stated requirements.

[0022] The specific practice of combination grinding Figure 1 to Figure 4 described as follows:

[0023] First clamp the rack 1 with the servo rotating end face positioning fixture 2, and use th...

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Abstract

The invention provides a machining method for a rack of an electric steering gear. According to the method, the process of stress relieving tempering, natural aging, one-time clamping and combined grinding is adopted, the requirements for the tolerance of the tooth surface of each driving tooth and the tooth surface of each driven tooth being + / - 5', the OPD variation of the tooth profile of each whole driving gear and the OPD variation of the tooth profile of each whole driven gear being 0.04 mm, the linearity being 0.05 and the roughness being Ra 0.8 are met, and the requirement for the high-precision tolerance of Max0.04 is guaranteed. By means of the method, the machining efficiency is improved, and the product precision is guaranteed.

Description

technical field [0001] The invention relates to a processing technology for auto parts, in particular to a processing method for an electric steering gear rack. Background technique [0002] Today, people's living standards are becoming more and more developed. People's requirements for cars are not only for transportation. At present, there are voices in the market that are high-end, comfortable, safe and highly automated. Faced with this situation, the need for innovation and improvement of the automobile steering gear as a key module is more urgent. At present, the steering gear adopts the driving wheel servo drive to occupy the market, but the processing of this rack is still at a low level. ; For example, the angle between the two tooth surfaces ensures a tolerance of plus or minus 5', and it is difficult to meet the high-precision variation of the whole tooth OPD. Because the material itself has stress and deformation, the above two problems are mutually influencing a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 李东振
Owner 上海格尔汽车科技发展有限公司
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