Title:
DRAWING PLUG
Document Type and Number:
WIPO Patent Application WO/2017/135598
Kind Code:
A2
Abstract:
A drawing plug according to an embodiment of the present invention is disposed between a drawing die and a pipe, is inserted inside the inner surface of the pipe, and processes the pipe. The drawing plug according to the present invention comprises: a large-diameter part formed to have a first outer diameter; a contact part which is in contact with one side surface of the large-diameter part and includes an inclined part having one side, which is in contact with the large-diameter part and is formed to have the first outer diameter, and having an outer diameter decreasing toward the other side of the inclined part; and an insertion part inserted in both the large-diameter part and the contact part to connect the large-diameter part and the contact part, wherein the inclined part has a stepped part stepped along the insertion direction and at least a part made of a diamond sintered body.
Inventors:
CHO BYUNG BOCK (KR)
YUN WON SUK (KR)
KIM MOO SUNG (KR)
KIM CHANG HYUN (KR)
YUN WON SUK (KR)
KIM MOO SUNG (KR)
KIM CHANG HYUN (KR)
Application Number:
PCT/KR2017/000635
Publication Date:
August 10, 2017
Filing Date:
January 19, 2017
Export Citation:
Assignee:
ILJIN STEEL CORP CO LTD (KR)
International Classes:
B21C3/16; B21C1/24; B21C3/02
Attorney, Agent or Firm:
CHOI, Hoon Sik (KR)
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