METHOD AND APPARATUS FOR FORMING RECESS OF HOLLOW PIPE

Title:

METHOD AND APPARATUS FOR FORMING RECESS OF HOLLOW PIPE

Document Type and Number:

WIPO Patent Application WO/2005/035159

Kind Code:

A1

Abstract:

A roll support block (10) has roll-forming rolls (6-9) arranged in four stages, and the roll support block (10) moves while being guided by a guide hole (13) of a pipe holder (5). The rolls (6-9) sequentially come, through a forming window (35) formed in the pipe holder (5), in press-contact with a hollow pipe (2) fixed by the pipe holder (5). First, while rolling, a first-stage roll (6) comes in press-contact with the hollow pipe (2), preliminarily forming a recess. Then, second- and third-stage rolls (7, 8), whose diameters are larger in that order, perform preliminary forming to enlarge the recess. Finally, a fourth roll (9) forms a final shape of a first or a second lock groove (3, 4).

More Like This:

WO/2011/068353	APPARATUS FOR MANUFACTURING A METAL PLATE FOR A DUCT, INCLUDING MESH-TYPE BEADS
WO/2000/037766	PROCEDURES AND EQUIPMENT FOR PROFILING AND JOINTING OF PIPES
JP2003191025	DEVICE AND METHOD FOR FORMING SIDE SURFACE OF WORK

Inventors:

Nagasono, Yutaka c/o Eishin, Inc Kawagoe Office (8-38 Yoshinodai 2-chom, Kawagoe-shi Saitama, 350-0833, JP)
Sato, Hiroshi c/o Eishin, Inc Kawagoe Office (8-38 Yoshinodai 2-chom, Kawagoe-shi Saitama, 350-0833, JP)
Nagasono, Hideaki c/o Eishin, Inc Kawagoe Office (8-38 Yoshinodai 2-chom, Kawagoe-shi Saitama, 350-0833, JP)

Application Number:

PCT/JP2004/015542

Publication Date:

April 21, 2005

Filing Date:

October 14, 2004

Export Citation:

Click for automatic bibliography generation Help

Assignee:

EISHIN INC. (12-18, Daikanyamacho Shibuya-ku, Tokyo, 150-0034, JP)
Nagasono, Yutaka c/o Eishin, Inc Kawagoe Office (8-38 Yoshinodai 2-chom, Kawagoe-shi Saitama, 350-0833, JP)
Sato, Hiroshi c/o Eishin, Inc Kawagoe Office (8-38 Yoshinodai 2-chom, Kawagoe-shi Saitama, 350-0833, JP)
Nagasono, Hideaki c/o Eishin, Inc Kawagoe Office (8-38 Yoshinodai 2-chom, Kawagoe-shi Saitama, 350-0833, JP)

International Classes:

B21D17/04; B21D17/00; (IPC1-7): B21D17/04

Attorney, Agent or Firm:

Kozu, Takako c/o Kubota (Hirai & Kozu 41-2-111, Senju Akebonoch, Adachi-ku Tokyo, 120-0023, JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: SYSTEM FOR CONTACTLESS APPLICATION OF TENSION IN ELECTRICALLY CONDUCTIVE METAL STRIPS

Next Patent: METHOD AND DEVICE FOR PRODUCING A PERIPHERALLY CLOSED HOLLOW PROFILED ELEMENT