| 摘要 |
FIELD: metal-working industry. ^ SUBSTANCE: invention is designed for forming profile of rail head using forming cutters furnished with change polyhedral blades with straight-line cutting edge. Proposed method includes preliminary machining for more uniform distribution of allowance for finish milling. Tool is furnished only with change polyhedral blades with straight-line cutting edge arranged at angle relative to axis of symmetry of rail and at angle to direction of feed. Then forming of profile is carried out in concave generating lines at rotation of change polyhedral blades with straight-line cutting edge arranged on tool body at angles to its axis. Generating surface of milling tool for rail forming has straight-line generatrix, and milling tool is furnished with change polyhedral blades with straight-line cutting edge, blades being arranged on tool body at angle of lambda>0 (in second forth design versions, at angle of lambda<0) so that at rotation of tool arranged at angle relative to axis of symmetry of rail and at angle to direction of feed, projection of generating surface of tool onto plane of normal section of rail is section of symmetrical profile of rail head (in third and fourth design versions, asymmetrical profile):at conventional milling, radius of conjugation of left-hand side face (in second design version, right-hand side face) with working surface and working surface to axis of symmetry of rail head, and at climb milling, radius of conjugation of right-hand side face (in second design version, left-hand side face) with working surface and working surface to axis of symmetry of rail head. In third and fourth design versions, projection of generating surface of milling cutter onto plane of normal section of rail is asymmetrical profile of rail head: at conventional milling - left-hand ones (in fourth design version - right-hand ones) and at climb milling, right-hand ones (in fourth design version - left-hand ones). ^ EFFECT: improved quality of machined surface, reduced cost of milling tools and vibration at milling. ^ 6 cl, 3 dwg |
