| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to metal forming, particularly, to cutting of pipe hollow shells. Said blade comprises flat base and cutting part. Blade cutting part is bulged and has the recess at its centre. Blade geometrical parameters are as follows: B=D+(2.5-3)S; R=(1.2-1.3)D; r=(0.25-0.3)D; h=(1.3-1.5)S, where B is the blade width, R is the radius of curvature of cutting surface, r is the recess radius, h is the recess depth, D is the pipe blank diameter, S is the pipe blank wall depth.EFFECT: smaller blade stroke and lower cutting forces.3 dwg |
