FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and maybe used for production of fasteners for space engineering. In making said fasteners, used is the workpiece with oxalate coating applied on its surface. Workpiece diameter makes 1.06-1.12 of fastener diameter. Heading is carried out, bolt body is reduced, circular transition for head and body is rolled. Then, thread with vee having rounded radius equal to 0.14-0.17 of thread pitch is cut. Bolt body is reduced at the rate of 0.2-1.5 m/s.
EFFECT: higher cyclic durability and strength.
2 cl, 1 tbl, 1 ex
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Authors
Dates
2013-06-20—Published
2012-02-16—Filed