METHOD FOR MAKING ARTICLES SUCH AS BOLT BLANKS Russian patent published in 2000 - IPC

Abstract RU 2161082 C1

FIELD: plastic metal working, possibly manufacture of articles such as bolt blanks including bolts with large-size heads. SUBSTANCE: method comprises steps of cutting initial blank, preliminary and final shaping of head at simultaneous upsetting of rod, reducing rod for making thread. Initial blank has diameter no more than 0.98 of nominal diameter of rod. Preliminary upsetting is realized by several stages. Rod reduction for thread making and final upsetting of bolt head are performed by one stage. Deformation degree of rod at preliminary and final shaping of head is no more than 18%. EFFECT: enlarged manufacturing possibilities of method, enhanced strength properties of bolts. 3 cl, 6 dwg, 1 ex

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RU 2 161 082 C1

Authors

Pospelov A.L.

Artjukhin V.I.

Chukharev G.A.

Drapeko V.N.

Pikalov A.V.

Khristenko T.V.

Dates

2000-12-27Published

2000-03-20Filed