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Design method and scraping modification process of a scraping tool for cylindrical gear finishing

A cylindrical gear and design method technology, applied in metal processing equipment, manufacturing tools, gear tooth manufacturing devices, etc., can solve the problem of tooth surface distortion, tooth profile modification error, tooth accuracy and other problems caused by tooth direction modification. The problem of accuracy retention is not obtained, and the effect of eliminating the distortion of the tooth surface, improving the cutting performance of the cutter teeth and being beneficial to the stability

Active Publication Date: 2022-08-05
XIAN UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

The gear cutting process has good machining accuracy and high processing efficiency. It is a hot spot in the field of gear processing. Its technological characteristics are very suitable for the finishing of internal gears. The design and modification processing are mainly based on the theory of gear shaping technology. There are principle errors in the modification of the gear tooth profile, and the modification of the tooth direction is easy to cause tooth surface distortion. The problems of gear cutting accuracy and accuracy retention cannot be fundamentally solved.

Method used

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  • Design method and scraping modification process of a scraping tool for cylindrical gear finishing
  • Design method and scraping modification process of a scraping tool for cylindrical gear finishing
  • Design method and scraping modification process of a scraping tool for cylindrical gear finishing

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Embodiment

[0064] According to the above method, the finishing scraping tool 1 of the internal gear workpiece is designed, and the related calculation of scraping and modification processing is carried out; the basic parameters of the internal gear workpiece are shown in Table 1.

[0065] Table 1

[0066]

[0067] Considering the machinability of the material of the gear workpiece 5 and the structural strength of the tooth 2, the front angle of the cutting edge 3 on both sides of the tooth 2 is designed, the rear angle of the top edge 4 is designed, and the cone bottom angle of the convex tapered end face 6 is designed. 1 The basic parameters are shown in Table 2:

[0068] Table 2

[0069]

[0070] In this embodiment, the tooth profile and tooth direction modification of the gear workpiece 5 are both drum-shaped modification methods, C ρ (ρ) is the tooth profile drum modification function, referring to ISO drum modification, it can be expressed as:

[0071]

[0072] Among the...

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Abstract

The invention discloses a design method and a scraping modification process of a scraping tool for finishing cylindrical gears. The end face of the scraping tool is in the shape of a convex cone as a whole, the teeth are divided into left and right side rake surfaces, and the working rake angle of the blades on both sides of the teeth is γ s Design separately; the side blade of the cutter tooth is enveloped by the modified tooth surface on the side rake surface, and scrapes the modified tooth surface of the gear in a single-sided cutting manner. The line-surface contact equation of the side cutting edge is obtained by fitting; this method can improve the structural strength and cutting performance of the cutter teeth, and improve the machining accuracy of gear modification.

Description

technical field [0001] The invention belongs to the technical field of gear processing technology, and relates to a design method of a scraping tool for finishing cylindrical gears. [0002] The invention also relates to a scraping and shaping processing method. Background technique [0003] Gears are key components of transmission machinery such as automatic transmissions, robot RV reducers, harmonic reducers, and wheel-side reducers for electric vehicles. However, due to the limitation of gear structure, especially the internal gear structure, it is difficult to finish them after heat treatment. Common internal gear finishing methods include gear shaping, shaving, broaching, grinding, etc. There are various limitations in finishing internal gears, and the processing effect is unsatisfactory: the efficiency and accuracy of gear shaping internal gears are comparable Low; shaving tool has poor cutting performance, and tool sharpening is inconvenient; broaching has high proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23F9/02B23F23/00
CPCB23F9/02B23F23/00
Inventor 郭正高峰李艳刘耀张燕飞
Owner XIAN UNIV OF TECH
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