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Processing method of vane pump rotor groove

A processing method and rotor slot technology, applied in metal processing equipment, pump control, manufacturing tools, etc., can solve problems such as low production efficiency, inability to process simultaneously, and low processing accuracy, to avoid uneven grinding, avoid The effect of grinding burns and improving production efficiency

Inactive Publication Date: 2011-03-23
ZF STEERING JINCHENG NANJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above processing process, the deformation of heat treatment and the positioning difference of multiple clamping will lead to low processing accuracy, and the parallelism and groove width accuracy of the groove can only be controlled at 0.01mm accuracy; and the uncontrolled pre-processing will easily lead to Poor surface roughness of galling or grooves
Heat treatment is required during the processing, which leads to complicated processing and the processing of the rotors in the prior art is carried out one by one and cannot be processed at the same time. In mass production, the production efficiency is low
[0005] In short, the quality of the rotor groove processed by the above method is not easy to control, and the process is complicated and inefficient, requiring multiple processing

Method used

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  • Processing method of vane pump rotor groove
  • Processing method of vane pump rotor groove
  • Processing method of vane pump rotor groove

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] The rotor used for steering pumps in the automotive industry, the material is GCr15, after the process test, the pre-processed spline inner hole φ9.23+0.01 is obtained, and the vacuum quenching furnace is used for heat treatment to ensure that the bottom diameter after heat treatment is φ9.3+0.015. The blank after heat treatment is clamped with a mandrel, and the mandrel is divided into two levels of φ9.3+0.01 and φ9.3-0.01 for use.

[0028] Before clamping, the two ends of the rotor blank are ground, and the parallelism is required to be less than 0.005mm. according to image 3 The clamping method shown is for clamping. Install the 5 rotors on the mandrel, and use nuts to compress it. Both ends of the mandrel are anti-thimbles, and the hydraulic cylinder drives the thimble to fix the mandrel.

[0029] The processing of this product adopts the cubic boron nitride grinding wheel with vitrified bond, the particle size is 80, the concentration is 200, and the outer diamet...

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Abstract

The invention discloses a processing method of a vane pump rotor groove, comprising the following steps: firstly, carrying out blank heat treatment; next, finely grinding a positioning surface of an end surface; and then, clamping a rotor and grinding a notch; and finally brushing up to remove burrs. The processing method is used for processing the vane pump rotor groove, forming a grinding groove once and reducing an accumulative error caused by multiple times of clamping, and the quality of products is increased by one accuracy grade. During the processing, the vane pump rotor groove is influenced by heat treatment deformation, and uncontrollable factors are removed as much as possible. The processing method avoids the problems of uneven traditional grinding quantity and grinding burn so as to obtain good surface roughness.

Description

technical field [0001] The invention relates to a method for processing a rotor of an automobile steering vane pump, in particular to a method for processing a rotor groove of a vane pump. Background technique [0002] The rotor part is one of the core parts of the steering vane pump. like figure 1 As shown, when the vane pump is working, the casing of the sealed pump is filled with hydraulic oil, and the rotor 1 rotates at high speed in the 2 circles of the stator, driving the vane 3 installed in the groove to slide back and forth, causing the area volume to change and thus the pressure to change. Therefore, the accuracy of the rotor slot directly affects the performance of the whole pump, such as minimum flow, noise, etc. [0003] The original rotor groove processing is based on the concept of "groove grinding". Firstly, the groove is pre-milled, followed by heat treatment, and then the groove is roughly ground, finely ground, and finally polished to deburr. [0004] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C14/00B24B7/17B24B19/02
Inventor 沙斌
Owner ZF STEERING JINCHENG NANJING