Magnetorheological elastomer grinding wheel and preparation method thereof

Abstract

The invention discloses a magnetorheological elastomer grinding wheel and a preparation method thereof. The magnetorheological elastomer grinding wheel is characterized in that a grinding wheel body comprises non-magnetic micro-powder abrasive particles and a magnetorheological elastomer binding agent, and a magnetorheological elastomer is composed of ferromagnetic particles, a rubber base body and additives. The preparation process of the grinding wheel mainly comprises the steps of material mixing, mold filling, magnetizing, compression molding, deep solidification and cooling demolding, andthe prepared grinding wheel has the variable stiffness characteristic of the magnetorheological elastomer. The magnetorheological elastomer grinding wheel and the preparation method thereof have theadvantages that the binding agent of the grinding wheel is an intelligent material, the preparation process is mature, the flexibility of the grinding wheel can be controlled by using a magnetic fieldin engineering application to improve self-adaptation of the grinding wheel to the workpiece face type and contact force, the machining efficiency can be improved, the surface loss of a workpiece isreduced, and the magnetorheological elastomer grinding wheel and the preparation method thereof are suitable for high-precision machining of micro aspherical surfaces and micro complex curved surfacesand the like.

Description

technical field [0001] The invention belongs to the field of grinding wheels, and in particular relates to a magneto-rheological elastomer grinding wheel and a preparation method thereof. Background technique [0002] With the development of miniaturization and portability of mechanical and optoelectronic products, ultra-precision parts such as tiny aspheric surfaces and tiny molds have become the key core components of high-tech products. Such parts have the following characteristics: 1) Complex shape and small size , mostly hard and brittle materials; 2) High requirements for processing accuracy and dimensional stability, surface quality requirements of nanometer or sub-nanometer; 3) There is no surface or subsurface damage. All of these pose great challenges to ultra-precision machining. [0003] At present, the most effective ultra-precision machining method is to use ultra-precision milling, turning, grinding and other processes before polishing, and the commonly used ...

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Problems solved by technology

[0003] At present, the most effective ultra-precision machining method is to use ultra-precision milling, turning, grinding and other processes before polishing, and the commonly used polishing methods are mainly divided into two categories: one is through the relative movement between the polishing head and the workpiece Adding abrasives, using free abrasives to scrape, squeeze, etc. the workpiece to achieve processing, the problem is that the processing efficiency is low, the cycle is long, and the processing quality cannot be guaranteed; the other is the fluid or Colloidal polishing can obtain a high-quality processed surface, but the processing process is not easy to control, and it is difficult to accurately modify the surface shape of the part

Therefore, the traditional ultra-precision machining technology is difficult to meet the high-precision requirements of small aspheric surfaces in terms of processing efficiency, processing accuracy, automation, and applicable processing profiles.

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