A kind of preparation method of helically arranged fiber grinding wheel

Abstract

The invention discloses a preparing device and method for a spirally and orderly arranged fiber abrasive wheel. The device comprises an abrasive wheel forming mechanism and a fiber equal-height protrusion mechanism. The abrasive wheel forming mechanism comprises an upper die plate, a lower die plate, a die sleeve I, a die sleeve II and a core bar. The fiber equal-height protrusion mechanism comprises a support, electromagnets and clamps. The preparing method comprises the steps that phenolic resin, a heat conduction material, metallic oxide, a solid lubricating agent and a pore forming material are mixed according to the proportion, and a blank is manufactured through hot-press forming; a series of circular holes spirally distributed are machined in the outer circumference of the blank through a deep hole drill, and a base body is obtained; the circular holes are filled with epoxy resin, fiber is embedded in the circular holes one by one, and the fiber is fixed to the base body through the abrasive wheel forming mechanism; the consistency of the fiber protrusion height is ensured through the fiber equal-height protrusion mechanism; and the epoxy resin is heated and cured, and the abrasive wheel is formed. The preparing device and method for the spirally and orderly arranged fiber abrasive wheel have the beneficial effects that the fiber protrusion height is consistent, the holding force is large, and the bending resistance is high; and the finishing workload of the abrasive wheel is low, the manufacturing cost is low, and the service life is long.

Description

technical field [0001] The invention belongs to the field of abrasive tool preparation, in particular to a preparation method of a grinding wheel, especially a preparation method of a spirally arranged fiber grinding wheel. Background technique [0002] Grinding technology is one of the most effective and widely used processing techniques for precision machining and ultra-precision machining in modern machinery manufacturing. As a grinding tool, the grinding wheel has been developed rapidly, but the traditional grinding wheel preparation process still has some shortcomings, such as the abrasive grains are easy to fall off, regular dressing is required, the temperature in the grinding area is high, some binders are easy to carbonize and decompose, and the service life is short. . [0003] In order to solve the above problems of the grinding wheel, the patent "a high-precision electroplating CBN grinding wheel manufacturing process" with the publication number CN102009391B us...

AI Technical Summary

Problems solved by technology

As a grinding tool, the grinding wheel has been developed rapidly, but the traditional grinding wheel preparation process still has some shortcomings, such as the abrasive grains are easy to fall off, regular dressing is required, the temperature in the grinding area is high, some binders are easy to carbonize and decompose, and the service life is short.

[0003] In order to solve the above problems of the grinding wheel, the patent "a high-precision electroplating CBN grinding wheel manufacturing process" with the publication number CN102009391B uses the method of electroplating to coat the abrasive grains on the substrate, which improves the grip of the grinding wheel on the abrasive grains. force, reducing the shedding of abrasive grains, but the working abrasive grain layer of the grinding wheel is a single layer, and there is no follow-up abrasive grain replenishment after the abrasive grains of the grinding wheel are worn out, and its service life is limited to a certain extent, and the electroplating grinding wheel has to go through many times during the production process. Pickling or alkaline cleaning has a great impact on the environment. At the same time, the invention has relatively strict technological conditions for the production of grinding wheels, and the process is relatively complicated.

The patent "resin bond diamond grinding wheel" with publication number CN102615598B uses phosphorous tungsten bronze alloy powder as filler to improve the performance of resin bond diamond grinding wheel, so that it has good self-sharpening and thermal conductivity, but this kind of grinding wheel The holding force on the abrasive grains is small, and the abrasive grains are easy to fall off, which reduces the service life of the grinding wheel

Some scholars have proposed the orderly arrangement of abrasive grains on the grinding wheel or the use of fibers instead of traditional abrasive grains to undertake the grinding task. Studies have found that both the orderly arrangement of abrasive grains and the fiber grinding wheel can improve the heat dissipation performance of the grinding wheel grinding area to a large extent. And it can alleviate the problem of abrasive particle falling off, but its preparation process is very complicated, and the problems such as poor consistency of fiber blade height have not been effectively solved.

The fiber grinding wheel prepared by this method significantly improves the chip space of the grinding wheel, the holding force of the grinding wheel to the diamond and the service life of the grinding wheel, and reduces the temperature in the grinding area, but there are certain defects in the preparation method. During the process, the resin bond will soften and flow under high temperature and high pressure, so the diamond fiber will inevitably be dislocated due to the softening and flow of the resin bond, resulting in the accumulation or vacancy of the diamond fiber in the local position after the grinding wheel is formed. The vibration of the grinding wheel is aggravated during grinding, which reduces the grinding accuracy

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