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

A technology of ball nut and large lead, which is applied in the direction of metal processing equipment, grinding/polishing equipment, grinding machines, etc., can solve the problems of grinding process and equipment that are not ideal enough, and achieve high grinding wheel repair efficiency and high grinding process efficiency. The effect of simple process and simple system structure

Inactive Publication Date: 2013-06-26
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this example, see figure 1 and figure 2 , a flexible shaft grinding head system for large-lead ball nut grinding, mainly including a mechanical flexible shaft 3, a small front shaft 8, a flexible shaft joint 4, a support block 10, a grinding rod sleeve 2, and the power of the mechanical flexible shaft 3 The output end and the front small shaft 8 are connected and assembled through the flexible shaft joint 4, the driven end of the mechanical flexible shaft 3 is coaxially fixedly connected with the electric spindle connection shaft head 1, and the front small shaft 8 is movably nested and installed on the support in a rotational connection. In the inner hole of the block 10, the mechanical flexible shaft 3 is movably nested and installed in the inner cavity of the grinding rod bushing 2 in a rotating connection mode, and the connecting support block 10 is tightly connected with the nested grinding rod bushing 2. 9 Fix the nested grinding rod sleeve 2 on the grinding ...

Embodiment 2

[0036] This embodiment is basically the same as Embodiment 1, especially in that:

[0037] In this embodiment, the front small shaft 8 is movably nested in the inner hole of the support block 10 through bearings, and the mechanical flexible shaft 3 is movably nested in the inner cavity of the grinding shaft sleeve 2 through bearings to form a rotating connection pair respectively. When the rotating parts are made to move relative to each other, the friction coefficient in the power transmission process is reduced and the central position of the shaft is kept fixed, so as to improve the working stability and service life of the flexible shaft grinding head system of this embodiment.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B19/06
Inventor 李静林帷杰沈南燕杜永聪何永义张伟贾亚凯
Owner SHANGHAI UNIV
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