Auxiliary supporting device for improving machining rigidity of equidistant arc surface slender shaft

Abstract

The invention discloses an auxiliary supporting device for improving machining rigidity of an equidistant arc surface slender shaft, and belongs to the technical field of machining of equidistant molded surface slender shafts. The auxiliary supporting device for improving the machining rigidity of the equidistant arc surface slender shaft comprises an outer supporting base and an inner supporting plate, the inner supporting plate is arranged inside the outer supporting base, the rotation center of the inner supporting plate is consistent with the rotation center of a machine tool spindle, a plurality of supporting holes are evenly formed in the inner supporting plate in the circumferential direction, each supporting hole is evenly provided with at least three elastic supporting structures in the circumferential direction, and the axes of the elastic supporting structures are arranged in the radial direction of the supporting holes. The auxiliary supporting device for improving the machining rigidity of the equidistant arc surface slender shaft can effectively improve the machining rigidity and machining efficiency of the equidistant arc surface slender shaft, can adapt to simultaneous machining of multiple shafts, and avoids interference of clamps during machining.

Description

technical field [0001] The invention relates to the technical field of equidistant profiled slender shaft machining, in particular to an auxiliary support device for improving the machining rigidity of an equidistant arc surface slender shaft. Background technique [0002] At present, the oil drill pipe adopts a square or hexagonal drill pipe structure to transmit torque, the contact stress is concentrated during operation, the torsional rigidity is low, and the life of the drill pipe is low. Long life and other advantages. However, since the center of each arc of the slender axis of the equidistant arc surface is not concentric with the geometric center of the slender axis of the equidistant arc surface, it is difficult to process the equidistant arc surface. Although turning and milling machining centers with C-axis functions can be used for machining, the cost of the machine tool is too high, and the machining efficiency is very low. [0003] The patent with the publica...

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Problems solved by technology

However, since the arc centers of the cross-section of the slender axis of the equidistant arc surface are not concentric with the geometric center of the slender axis of the equidistant arc surface, it is difficult to process the equidistant arc surface, and it is difficult to process a single axis. Although the turning and milling machining center with C-axis function can be used for processing, the cost of the machine tool is too high, and the processing efficiency is very low

[0003]The patent "a equidistant arc surface shaft and processing device" with publication number CN108942090A discloses the realization of equidistant arc surface on ordinary machine tools or ordinary CNC machine tools Although the patent can improve the efficiency, it does not solve the problem of low rigidity in the machining of equidistant arc surface slender shafts. It can be seen that for oil drill pipes and other slender shafts with large length-to-diameter ratio and low rigidity, etc. The machining of the distance from the arc surface cannot be carried out without auxiliary support

[0004]Currently, the auxiliary support used for slender shaft turning, turning milling, grinding, etc. is only suitable for processing the slender shaft whose center of outer circle coincides with the center of rotation of the shaft However, there is still a lack of auxiliary support methods and devices for the machining of equidistant circular arc surface slender shafts whose arc centers do not coincide with the shaft's rotational centers, and there is even a lack of auxiliary support for simultaneously processing multiple equidistant circular arc surface slender shafts. support

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