Title:
BENDING DEVICE OF HOLLOW DOUBLE TUBE
Document Type and Number:
Japanese Patent JP3676871
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a bending device having a simple structure capable of easily and continuously performing two-dimensional and three-dimensional bending.
SOLUTION: In this device, the fixing end side F of the hollow double tube P is constrained with a bending die 1 and a fixing die 2, the middle part of the hollow double tube P is slidably held with a shoe 3 and a pressing die 4 behind the bending die 1 and the fixing die 2, an inner core bar 5 is inserted into the inner tube P1 and a tubular core bar 6 is inserted between the inner tube P1 and an outer tube P2 from the opening end side of the hollow double tube P, and the hollow double tube P is bent by turning the bending die 1 in the bending direction. In this case, a pressing member 8, striking in common to the opening end surface of the inner tube P1 and the outer tube P2, is provided. The pressing member 8 and a chuck 7, fixing to the peripheral surface of the outer tube P2 at the opening end side of the hollow double tube P, are combined via a guiding long hole 10 formed in the tubular core bar 6, and the tubular core bar 6 is turned to the inner core bar 5.
Inventors:
Arai Saburo
Application Number:
JP34564195A
Publication Date:
July 27, 2005
Filing Date:
December 08, 1995
Export Citation:
Assignee:
Sankei Giken Co., Ltd.
Vista Co., Ltd.
Vista Co., Ltd.
International Classes:
B21D7/025; B21D9/00; B21D9/07; B21D53/84; (IPC1-7): B21D9/00; B21D7/025; B21D9/07
Domestic Patent References:
| JP51049157A | ||||
| JP49059766A |
Attorney, Agent or Firm:
Naoto Kan
Ryuji Takahashi
Ryuji Takahashi