PURPOSE: To suppress the clogging of a polishing member and improve a finished surface by keeping the flow-rate of working liquid, surface area of a tool, and the pressing pressure of the tool into a specific relation by using a water-passing polishing material and the working liquid which has a specific surface tension and has the surface-oxidation suppressing performance for Al material.
CONSTITUTION: The abrasive having a surface tension of 60dyn/cm or less and has the water-passing performance for the working liquid having surface-oxidation suppressing function for Al material is used, and the relation between the flow-rate of the working liquid Ql/min, surface area Scm2 of a tool, and the pressing force Pkg.f/cm2 of the tool is set into Q/S.P>0.01l/min.kg.f. The working liquid 4 is supplied onto a workpiece 8 from a feeding passage 3 through an effluence port 6 and a polishing member 7, and a tool 1 in revolution is pressed onto the workpiece and shifted. When the workpiece 8 is friction-ground by the grinding grains 9 fixed onto the polishing member 7, working scraps 10 are transferred in the polishing member 7 and discharged by the working liquid 4. When a sufficient flow-rate Q is provided together with the pressing force P and the surface area S of the tool, the working scraps are smoothly discharged without being piled, and stable friction operation of the grinding grains can be maintained, and the surface roughness can be kept constant.
MAEHATA HIDEHIKO
DAIKU HIROYUKI
| JPS352586Y1 |