High-precision gear manufacturing method

Abstract

The invention relates to a high-precision gear manufacturing method. By optimizing nitrogen process parameters and adopting a flexible positioning net, parts are nitrogenized in a free state, a sandblasting machining method is adopted in a subsequent process to uniform residual stress on the surface of a spoke plate, and by taking measures of using a self-adaptive gear grinding fixture, increasing a sandblasting process and the like, the problems that deformation occurs during gear machining and the precision cannot be guaranteed are solved. The method provided by the invention has the advantages that the stability of nitrogenization is guaranteed, the cutting precision is improved, the spoke plate is prevented from being deformed, the deformation during machining and nitrogenization is effectively controlled and the machining quality of the part is guaranteed.

Description

technical field [0001] The invention relates to a high-precision gear manufacturing method, which is used for high-precision thin-wall gear processing and nitriding deformation control. Background technique [0002] As a common transmission part, gears are widely used in mechanical systems. In the field of aviation transmission, gears are indispensable transmission parts. In order to ensure the reliability and stability of aviation transmission, it is necessary to ensure the various indicators of gears. For example, the gear in an aviation transmission system is made of E32CDV13 and has a diameter of 67-119mm. There is a thin-walled web on the gear, and the thickness of the web is 2-4.5mm. The total deviation of the tooth profile after manufacturing is required to be within Within 6μm, the total deviation of the helix is ​​within 6.5μm. At the same time, in order to ensure the wear resistance of the gear and other indicators, it is necessary to carry out nitriding treatment...

AI Technical Summary

Problems solved by technology

[0004] ①During the nitriding process, the parts are placed in the traditional fixture support mode, and the stress on each position is unbalanced during the nitriding process, which makes the nitriding process unstable and cannot meet the requirements of stable heat treatment;

[0005] ② Due to the structure of the part, the residual stress generated in the processed web is released during the nitriding process, resulting in irregular deformation of the web of the part;

[0006] ③Because grinding cannot be carried out after nitriding, the tolerance of parts needs to be reasonably distributed in the process of grinding before processing and subsequent heat treatment. On the basis of ensuring the deformation of nitriding, the tolerance of grinding teeth after distribution is extremely small, and the existing processing methods cannot Meet tolerance requirements;

[0007] ④Gear chamfering and rounding cannot meet the requirements of the design drawings, which affects the measurement accuracy of the gear during processing, resulting in unreasonable setting of subsequent parameters, so that the final product cannot meet the requirements