Processing method of work piece with ring gear

Abstract

The invention discloses a processing method of a work piece with a ring gear. An external contour corresponding to the ring gear of the work piece comprises at least two types of cross sections with different sizes. The work piece is processed through the following steps: 1) processing the external contour of the work piece to form a blank work piece with cross sections of different sizes; 2) adding a pressure sleeve to the end of the blank work piece with a small cross section after processing of Step 1; 3) processing a round hole and internal teeth for the blank work piece with the pressuresleeve obtained in Step 2 to obtain the ring gear; and 4) removing the pressure sleeve of the blank work piece after obtaining the ring gear in Step 3 and then carrying out heat treatment. Since the pressure sleeve is added on the small end of the external contour prior to the processing of the ring gear in the method for processing the work piece with the ring gear so that the small end of the external contour can produce processing deformation under high pressure during the processing of the ring gear, and the heat treatment is carried out for the work piece after the processing of the ringgear so that the shrinkage deformation of the ring gear can compensate for the deformation during processing, the ideal size is obtained ultimately.

Description

technical field [0001] The invention relates to a machining method, in particular to a machining method for a workpiece with an inner ring gear. Background technique [0002] As we all know, gears, including internal gears with internal ring gears and various external gears, are widely used in various mechanical transmissions. However, different industry needs and uses lead to different structures of gears. For example, in many practical productions and lives, it is necessary to use a gear with an inner ring gear whose outer profile has cross-sections with different sizes. In the process of producing this gear, the outer profile and the inner ring gear are combined After processing and forming, heat treatment is carried out; however, due to the different cross-sectional dimensions of the external profile of this gear, the deformation of the large and small ends is different during heat treatment, that is, the deformation rate of the small end is fast and the deformation is l...

AI Technical Summary

Problems solved by technology

For example, in many practical productions and lives, it is necessary to use a gear with an inner ring gear whose outer profile has cross-sections with different sizes. In the process of producing this gear, the outer profile and the inner ring gear are combined After processing and forming, heat treatment is carried out; however, due to the different cross-sectional dimensions of the external profile of this gear, the deformation of the large and small ends is different during heat treatment, that is, the deformation rate of the small end is fast and the deformation is large; while the deformation rate of the large end is slow and the deformation is small. , which eventually causes the size deviation of the inner ring gear, that is, the internal diameter a of the inner ring gear after heat treatment near the large end of the outer contour is large, and the inner diameter b near the small end of the outer contour is small, becoming a contracted horn shape such as figure 1 As shown, the precision of the internal teeth is low, the defect rate is high, and the entire machine equipment may fail due to poor transmission, burying hidden dangers

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