A new type of superhard abrasive grinding wheel with high thermal conductivity phase change heat storage and preparation method thereof

A phase-change heat storage, super-hard abrasive technology, applied in the field of grinding wheels, can solve the problems of gas-liquid phase change heat transfer process and efficiency weakening, hindering the movement of the cold end to release heat and condensation, increasing the thermal resistance of the heat pipe, etc. Liquid-to-two-phase conversion efficiency, novel grinding wheel structure, and the effect of reducing thermal resistance

Active Publication Date: 2020-11-17
HENAN UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • A new type of superhard abrasive grinding wheel with high thermal conductivity phase change heat storage and preparation method thereof
  • A new type of superhard abrasive grinding wheel with high thermal conductivity phase change heat storage and preparation method thereof
  • A new type of superhard abrasive grinding wheel with high thermal conductivity phase change heat storage and preparation method thereof

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Embodiment 1

[0036] Such as Figure 1-3 As shown, a new type of high thermal conductivity phase change heat storage superabrasive grinding wheel includes a grinding wheel base 1 and abrasive materials 10. An annular lumen 2 is provided at the inner and outer ends of the grinding wheel base 1, and the annular lumen 2 is filled with There is an annular metal foam 3, such as copper foam, and a gas-liquid phase change heat transfer working medium is also provided in the annular tube cavity 2. The pore diameter of the foam copper is 5-80PPi, and the through-hole ratio is higher than 95%. In this embodiment, due to the step structure at the entrance of the outer peripheral side of the annular lumen, the copper foam cannot completely fill the entire annular lumen, resulting in an assembly gap between the foam copper and the inner side of the annular lumen. Therefore, it is necessary to Metal filling blocks 11 are filled in the gaps. The copper foam 3 and the metal filling block 11 adopt a block-...

Embodiment 2

[0050] A method for manufacturing a novel high thermal conductivity phase change heat storage superabrasive grinding wheel, comprising the following steps:

[0051] 1) According to the design size, make the grinding wheel base, end cover, foam metal, metal filling block, copper foil / graphite composite sheet, vacuum pumping, liquid injection and sealing structure;

[0052] 2) Place the copper foil / graphite composite sheet on one side of the annular lumen in an equal area, attach another copper foil / graphite sheet to one side of the metal foam, and then splice the metal foam into the ring groove After that, apply structural glue on both sides of each metal filling block, insert it into the assembly gap between the copper foam and the grinding wheel base, and connect and fix the three after curing, and fill the structural glue between adjacent metal foams for fixing;

[0053] 3) Assemble the cover plate on the annular groove and weld it;

[0054] 4) Finish the grinding wheel bas...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D5/16B24D18/00B24D5/10
CPCB24D5/10B24D5/16B24D18/0054
Inventor 赫青山杨天标傅玉灿崔仲鸣
Owner HENAN UNIVERSITY OF TECHNOLOGY
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