| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to powder metallurgy, particularly, to production of microdrill for boring microholes composed of two sintered parts. Drill compacted powder part is formed with recess at its one end as well as drill shank compacted powder part with ledge to be fitted in drill part recess. Drill and shank parts are assembled to have a ledge fitted in said recess and sintered. Shank part has permanent joint with engine. Drill and shank parts are made from different materials.EFFECT: higher strength and stability of joint.11 cl, 4 dwg |
