ゴムの研削加工に関する研究 (第1報)

円筒プランジ研削における研削仕上面

抄録

In this paper, the formation process of saw-toothed type abrasion pattern generated on the ground surface by rubber grinding and the effects of grinding conditions and rubber materials upon the surface roughness are discussed. Grinding tests were performed in cylindrical plunge grinding of NBR (acrylonitrile butadiene rubber) and CR (chloroprene rubber), and the ground surfaces were observed with a microscope and a surface roughness meter. The main results obtained are as follows : (1) The distance and the height of saw-tooth on ground surface are proportional to speed ratio and plunge speed, but are inversely proportional to apparent distribution density of abrasive grain. (2) The distance and the height of saw-tooth are independent of rubber materials but are determined by these static modulus of elasticity E_s, and are in inverse proportion to E_s. (3) The mean values of chip thickness calculated from the ratio of sawtoothed pattern and the depth of cut per one revolution of workpiece in steady grinding state coincide fairly with the measured values.