Flexible shaft grinding head system of large-lead ball nut grinding and grinding method for machining nut

Abstract

The invention discloses a flexible shaft grinding head system of large-lead ball nut grinding, and further discloses a grinding method for machining a nut. According to the flexible shaft grinding head system of large-lead ball nut grinding, a power output end of a mechanical flexible shaft is connected and assembled with a front end small shaft through a flexible shaft connector, a driven end of the mechanical flexible shaft is coaxially and fixedly connected with a motorized shaft connection shaft head, an axis of rotation of a grinding wheel is coaxially arranged with the front end small shaft, the grinding wheel is fixed on the front end small shaft of the grinding wheel through a compression screw of the grinding wheel, and a connection angle alpha of the axis of rotation of the grinding wheel and an axis of the mechanical flexible shaft is in accordance with an angle of a thread lead angle of the nut to be grinded for grinding and machining the nut to be grinded. The flexible shaft grinding head system is constructed due to the adoption of a combined shaft with shaft end couple vector directions randomly adjustable, so that the connection angle of the axis of rotation of the grinding wheel and a grinding rod axis accords with different lead angles, and interference of a grinding wheel grinding rod and a nut inner ring is avoided. The flexible shaft grinding head system of large-lead ball nut grinding and the grinding method for machining the nut are applicable to long-distance grinding and machining of large-lead nut inner rolling passages.

Description

technical field [0001] The invention relates to a workpiece grinding process and equipment, in particular to a nut grinding device and grinding method, especially a grinding process and equipment for a large-lead ball nut. Background technique [0002] The ball screw pair has the characteristics of high transmission efficiency, high positioning and repeat positioning accuracy, long service life, and low friction factor. Although the linear motor feed drive system has appeared, the high-speed ball screw nut pair is still commonly used in mechanical transmission. part. Generally, the surface quality of the auxiliary raceway of the ball screw is required to be above Ra0.8, and the final process of ball nut processing is generally formed by grinding, so the final precision and surface quality of the inner raceway are guaranteed by the grinding process. The normal section of the helical raceway of the ball screw pair used in most feed systems adopts a Gothic section, which consi...

AI Technical Summary

Problems solved by technology

Using this grinding method increases the range of the helix angle that can be ground to a certain extent, but it cannot fundamentally solve the problem of grinding interference of the long lead nut raceway, and if the installation angle of the grinding wheel shaft is too small , it is easy to form an overcut between the grinding wheel and the thread raceway surface, so that the truncated shape of the ball nut raceway after grinding is not completely Gothic arc

Therefore, it is necessary to design a grinding method and device that can ensure sufficient rigidity of the grinding rod and realize any lead and length of the ball nut raceway. However, the grinding process and equipment of the large lead ball nut currently used are not ideal enough.

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