Abstract: The pratical test indicated: There are many factors affecting cutting resistance of the blade edge, such as, angle of wedge β, angle of slidecutting α, velocity of cutting v and diameter of corm d. Through the indoor test of cutting resistance of the corms of Chinese pine, an regression formula P=f(β,a,v,d) is established by combinative designed method of quadratic-turning-regression. Then, the paper makes an optimization on the cutting parameters and provides a theoretical basis for designing a cutpicking device.

Key words: Corm, Cutting resistance, Cutting parameters, Optimization