Control method for tooth shape size precision of cold forming straight bevel gear

Abstract

The present invention discloses a control method for tooth shape size precision of a cold forming straight bevel gear. The method comprises: 1) establishing a contact analysis gear model according to a gear theory model; 2) generating a mold cavity; 3) determining a finite element gear model after considering resilience; 4) comparing the finite element gear model with the contact analysis gear model to obtain model deviation; 5) correcting the mold cavity, and carrying out finite element calculation to obtain a new finite element straight bevel gear model; 6) comparing the finite element straight bevel gear model with the contact analysis of gear model, carrying out outputting if the size precision requirement is met, otherwise determining the deviation between the finite element straight bevel gear model and the contact analysis of gear model; and 7) repeated performing the steps of 5) and 6) until the size precision requirement is met. According to the present invention, the size of the cold forming mold cavity of the straight bevel gear is determined after the shape correcting, the material and the mold of the tooth shape after resilience are considered, such that the tooth shape size precision of the straight bevel gear is ensured, and it is ensured that excellent contact and transmission effects of the straight bevel gear after cold forming can be directly met without mechanical processing.

Description

technical field [0001] The invention relates to a gear precision control method for a straight bevel gear tooth profile under the condition of a gear cold forming process. It is a method for determining the cavity size of a cold forming mold after considering the modification of the tooth profile, the material and the rebound of the mold, and belongs to Metal plastic forming technology field. [0002] Background technique [0003] As the main body of power transmission, gear transmission is still an important basic component in the complete set of mechanical equipment in the 21st century. It has the advantages of constant power output, practicality and reliability, high efficiency, and mature production technology. Therefore, it still has an irreplaceable position in the transmission of power, especially in occasions where relatively large power is the main force. [0004] At present, people have successfully solved the problems of metal cutting processing methods, cutting...

AI Technical Summary

Problems solved by technology

However, the focus is still on the determination of the forming process, and the influence of factors such as metal deformation, blank size, elastic deformation and unevenness of the mold, and wear of the mold on the tooth profile accuracy during the forming process has not been considered. For modification, high tooth profile accuracy cannot be obtained, so a gear pair with good transmission performance cannot be obtained

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