An electronically controlled magnetic field flexible capsule liquid-filled polishing device

Abstract

The invention relates to an electrically controlled magnetic field flexible ballonet fluid-filled polishing device and belongs to the field of flexible machining tools for ultraprecise optical surfaces. The device comprises a flexible ballonet, rheological fluid, electromagnets, variable resistors, a circular carbon brush, a rotating shaft, clamping grooves and the like. During work, each variable resistor is adjusted to acquire the required current, power is supplied to each group of electromagnets, an electric power conductor is connected with the outside through the circular carbon brush; under the action of a comprehensive magnetic field formed by the multiple electromagnets, the rheological fluid in the flexible ballonet becomes thick or approaches a solid state, a working surface is in copying contact with a workpiece, and the flexibility of the ballonet can be controlled through the magnitude of the current; the clamping grooves in the rotating shaft are used for fixing the device onto a power head of a common machine tool to obtain driving power, so that the device rotates at high speed for polishing. The polishing device has the advantages of adjustable flexibility of a tool head, controllable magnetic field and high adaptability to surface curvature change, and can meet the requirement for quickly polishing ultra smooth free curved surfaces.

Description

technical field [0001] The invention relates to a polishing tool, in particular to an electrically controlled magnetic field flexible capsule liquid-filled polishing device, which belongs to the field of ultra-precision optical surface flexible processing tools. Background technique [0002] The processing technology of optical aspheric surface with changing curvature has always been the bottleneck restricting its further wide application. A polishing head composed of a hard polishing mold encounters great difficulties in polishing an aspheric surface, which is mainly caused by the inconsistency of the curvature radius of each point of the aspheric surface. The common asphalt polishing mold cannot adapt to the changing speed of the aspherical surface curvature during the high-speed polishing process. Therefore, the stability of the removal function generated at each point is greatly reduced, which is not conducive to the rapid convergence of surface shape accuracy. [0003]...

AI Technical Summary

Problems solved by technology

[0005] The present invention designs an electronically controlled magnetic field flexible bladder type liquid-filled polishing device in order to solve the problems that the tool head needs to be frequently replaced, the flexibility of the contact area cannot be accurately controlled, and the structure of the polishing tool is complicated in the actual use of the existing airbag polishing technology.

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