| 摘要 |
FIELD: plastic working of metals, possibly forming by extrusion sleeve type articles used, namely for making envelopes of bimetallic products. ^ SUBSTANCE: punch includes stem portion and cylindrical working portion having on end face concentric turnings with depth in range 0.05 - 0.10 mm. Diameter of turning maximally spaced from punch axis does not exceed 0.7 diameter of end face of working portion of punch. ^ EFFECT: enhanced quality of formed articles. ^ 3 dwg, 1 ex |
