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2 037 350

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IPC

(21) (22)

Application

5065244/02, 1992-10-12

(22)

Actual filing date

1992-10-12

(45)

Published

1995-06-19

(72)

Inventor

Kurjatnikov A.V.Frolochkin V.V.Chikalov G.V.Pivkin V.P.Shirjaev V.K.Jachmenev A.N.Mironov Ju.G.

(73)

Holder

Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Trubnoj Promyshlennosti"

PIERCING MILL MANDREL Russian patent published in 1995 - IPC

Abstract RU 2037350 C1

FIELD: mechanical working. SUBSTANCE: mandrel has spout, body increasing in cross section along axis and calibrating cylinder body. Central hollow space and system of wall placed inclined channels outgoing to the surface of the body are inside mentioned members. Cylinder body of spout has annular flute. Additional group of inclined channels connecting outside surface with the side part of space is led up to the flute. Front part diameter of the space is determined according to mathematical function. EFFECT: improved design. 2 cl, 4 dwg, 1 tbl

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RU 2 037 350 C1

Authors

Kurjatnikov A.V.

Frolochkin V.V.

Chikalov G.V.

Pivkin V.P.

Shirjaev V.K.

Jachmenev A.N.

Mironov Ju.G.

Dates

1995-06-19—Published

1992-10-12—Filed