A processing technology for gear modification of agricultural machinery

Abstract

The invention discloses a process for modifying the shape of an agricultural machinery gear, which comprises the following steps: processing a blank to obtain a first-order gear; taking pictures to record the shape data of the first-order gear, set A; performing heat treatment on the first-order gear to obtain a second-order gear ;Calculate the deformation deviation coefficient H and the deformation deviation amount by the weighted average comparison method as a set C; according to the set A, set multiple sampling points at the tooth profile position of the first-order gear, and set all sampling points along the involute The line normal direction is offset, the offset data set is set D, and the data of the corresponding sampling points in set D and set C are added together to obtain the offset data set E of the second-order gear; for the data set E, a The modified curve, the modified surface and the modified 3D model; the modified 3D model of the second-order gear is input into the CNC machine tool to process the finished agricultural machinery gear. The invention not only can reduce the running noise of the gear, but also has the advantages of less wear of the gear and higher production efficiency.

Description

technical field [0001] The invention relates to a gear modification processing technology, in particular to an agricultural machinery gear modification processing technology. Background technique [0002] At present, most of the gears used in the existing agricultural machinery are large spur gears (modulus ≥ 6mm), and such gears are seldom modified carefully, resulting in relatively large noise during the use of agricultural machinery; and when When the load of agricultural machinery is large, the gears of agricultural machinery are easy to wear. In addition, after the heat treatment of the large gear, the deformation ratio at the tooth position of the large gear is relatively large, and the modification method calculated by directly referring to the calculation method of the tooth modification function of the small gear (modulus ≤ 3mm) with small tooth deformation The shape quantity data has large errors, resulting in unsatisfactory final agricultural machinery gear modif...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the gears used in the existing agricultural machinery are large spur gears (modulus ≥ 6mm), and such gears are seldom modified carefully, resulting in relatively large noise during the use of agricultural machinery; and when When the load of agricultural machinery is large, the gears of agricultural machinery are easy to wear

In addition, after the heat treatment of the large gear, the deformation ratio at the tooth position of the large gear is relatively large, and the modification method calculated by directly referring to the calculation method of the tooth modification function of the small gear (modulus ≤ 3mm) with small tooth deformation The large error in shape data leads to unsatisfactory final agricultural machinery gear modification effect, and it will still cause problems such as high noise and large wear

Therefore, the existing agricultural machinery gear modification processing technology has the problems of high gear running noise and serious gear wear.