1982 Volume 48 Issue 12 Pages 1567-1572
To analyze the cutting mechanism of face grinding, model tests of two-dimensional cutting are carried out under the condition that depth of cut is kept constant and that rake angle is negative. The work is made of Plasticine whose similarity with heated steel is claimed. At first small-sized three-component dynamometer with the structure of parallel beams having circular holes is developed. Using a fiat tool to which those dynamometers are attached, the distribution of the stress in chip-tool contact region is observed. The results are as follows : (1) The normal stress takes a maximum value near the tool edge and has a constant in the middle of the contact region. The frictional stress varies to positive or negative alternately. (2) The curves of the distribution change slightly with rake angle or cutting speed. The value of the normal stress increases as rake angle decreases or cutting speed increases. In contract with that, the absolute value of the frictional stress reduces.
