Novel high-thermal-conductivity phase-change heat storing superhard abrasive grinding wheel and preparation method thereof

Abstract

The invention provides a novel high-thermal-conductivity phase-change heat storing superhard abrasive grinding wheel. The abrasive grinding wheel comprises a grinding wheel base body, wherein an annular pipe cavity is arranged in the position, close to the outer end, of the grinding wheel base body, annular foam metal fills the annular pipe cavity, and a gas-liquid phase-change heat transfer working medium is further arranged in the annular pipe cavity. An assembling gap is arranged between the foam metal and the inner side of annular tube cavity, metal filling blocks fill the assembling gap,and copper foil / graphite composite sheets are attached to the two side walls of the annular pipe cavity. The novel high-thermal-conductivity phase-change heat storing superhard abrasive grinding wheelhas the advantages that the heat conducting capability is high, the heat transfer performance is hardly influenced by the action of centrifugal force, and the grinding temperature can be effectivelycontrolled by using a small amount of cooling liquid.

Description

technical field [0001] The invention relates to a grinding wheel, in particular to a novel superhard abrasive grinding wheel with high thermal conduction phase change and heat storage and a preparation method thereof. Background technique [0002] At present, the key issues restricting the development and promotion of high-efficiency grinding processing technology are grinding high temperature, and the resulting burns on the surface of the workpiece and low processing efficiency. This phenomenon is particularly obvious in the high-efficiency grinding of parts such as high-strength and toughness materials. . In order to achieve the purpose of timely cooling, increasing the jet velocity and usage of coolant to maximize the heat transfer effect in the grinding arc area is currently the main method to suppress grinding burns and improve grinding efficiency. But in fact, due to the limitation of the critical heat flux density in the grinding arc area and the obstruction of the s...

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Problems solved by technology

[0004] However, there is a common problem in these two structures, that is, for the heat pipe part, the centrifugal force generated when the grinding wheel rotates at a high speed will prevent the working fluid from absorbing heat and vaporizing, moving to the cold end and releasing heat and condensing at the cold end, which will cause heat loss inside the heat pipe. The gas-liquid phase change heat transfer process and efficiency are weakened, and the thermal resistance of the heat pipe part increases

Therefore, the above-mentioned structural grinding wheel has excellent heat transfer ability only under low-speed working conditions, and under high-speed grinding conditions, the heat transfer ability of the above-mentioned structural grinding wheel decreases

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