Diagonal modification bevel gear point contact tooth grinding method

Abstract

According to the diagonal modification bevel gear point contact tooth grinding method, tooth grinding is conducted according to the conical surface grinding wheel point contact generating method principle, when a conical surface grinding wheel strokes along a contact line, workpiece generating motion and grinding wheel stroke motion are alternately conducted, materials are removed only along the contact line in the stroke motion, and the tooth shape is not changed; when the grinding wheel strokes in the axial direction, the stroke motion and the generating motion are conducted at the same time and limited by a shape correction area, so that motion parameters of a machine tool in each stroke are different, the optimal stroke position and the total number of times of the grinding wheel are determined according to an equal roughness method, and machining error sensitivity analysis is conducted on the basis of finite discrete points of tooth surface strokes. The cross section of a conical surface grinding wheel shaft is a straight line, machining and correction are convenient, a grinding wheel with a small diameter can be adopted, and machining of any high-precision diagonal modification bevel gear and a combined herringbone gear can be accurately and rapidly completed.

Description

technical field [0001] The invention belongs to the technical field of gear manufacturing, and in particular relates to a point contact grinding method for diagonally modified helical gears. Background technique [0002] Compared with the traditional modification of the helical gear diagonal, since the modification area is only the meshing end and the meshing end and the modification area is small, the teeth after modification still have greater rigidity and high coincidence, thus improving the load capacity It is especially suitable for solving the vibration and noise problems of helical gear pairs installed at high speed and high precision. Diagonally modified helical gears mainly have two kinds of modified tooth surfaces, one is that the modification amount is equal along the instantaneous contact line, and the other is that the modification amount is unequal along the contact line, and its design and processing are more difficult. The radial shaving cutter after sharpen...

AI Technical Summary

Problems solved by technology

The traditional tool setting method is to use the outer circle of the grinding wheel to touch the tooth top, and then accurately set the tool to the root of the tooth according to the cutting depth. Large modification errors are generated; automatic tool setting technology involves contact detection, which needs to accurately obtain the position of the alveolar boundary, which is relatively complicated

When the grinding wheel undergoes diagonal modification of the tooth surface along the axial stroke, the tool setting method is relatively easy, but the stroke movement and the generation movement are carried out at the same time. Due to the limitation of the modification area, the movement parameters of the machine tool are different for each stroke. The processing is very complicated and cumbersome; in order to reduce the number of strokes and improve the precision of grinding teeth, it is necessary to accurately determine the motion parameters of the machine tool for each stroke

Domestic related technologies in this area are not yet mature. In order to solve the manufacturing of different diagonally modified tooth surfaces of helical gears and combined herringbone gears, a new technical solution is proposed.

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