Machining method for rack tooth profile of circulating ball type variable ratio diverter gear pair

Abstract

The invention discloses a machining method for a rack tooth profile of a circulating ball type variable ratio diverter gear pair. The machining method is characterized in that an involute gear sector transmitted by a variable ratio rack is replaced with a slotting cutter with design parameters being the same with the basic design parameters of the gear sector, the slotting cutter is adopted to simulate the movement of the involute gear sector, and the variable ratio rack tooth profile meeting the design requirement is machined in a generating manner. The machining method mainly comprises the first step of calculation of basic design parameters, the second step of design of the slotting cutter, the third step of establishment of a generating motion equation, the fourth step of establishment of a radial feeding motion equation of the slotting cutter, the fifth step of establishment of an axial feeding motion equation of the slotting cutter, the sixth step of establishment of a gear shaping machining variable ratio rack tooth profile mathematical model, and the seventh step of generating manufacturing of the variable ratio rack tooth profile through the slotting cutter. According to the machining method, the calculation process is simple, gear shaping machining is adopted, and the overall efficiency of designing and machining can be improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering, and relates to a straight-tooth variable ratio gear pair, in particular to a processing method for a gear pair rack tooth profile of a recirculating ball type variable ratio steering gear. Background technique [0002] The variable ratio characteristic of the steering gear can improve the steering performance of the entire steering system, that is, the transmission ratio of the gear fan and the rack is changed during the transmission process. In the gear pair of the recirculating ball type variable ratio steering gear, the tooth profile of the tooth sector is an involute, which is called an involute tooth sector tooth profile, while the rack is a variable ratio tooth shape, and the tooth shape parameters of the tooth sector are the basic design parameters . At present, the profiling method is mainly used in the market to process variable-ratio racks. However, the tooth profile of ...

AI Technical Summary

Problems solved by technology

At present, the profiling method is mainly used in the market to process variable-ratio racks, but since the tooth profile of the profiling tool is usually designed by the traditional analytical method, the calculation process is extremely complicated, and the tooth profile of the tooth root is relatively complicated.

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