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Title:
PRODUCTION OF BENT TUBE ON NON ROUND SHAPE CROSS SECTION AND DEVICE THEREFOR
Document Type and Number:
Japanese Patent JP3448390
Kind Code:
B2
Abstract:

PURPOSE: To provide a method and device to produce a bent tube of excellent cross sectional precision in producing a bent tube of non round shape cross section with, floating/expanding plug bending.
CONSTITUTION: When a tube stock 2 is made to a bent tube by connecting a floating/expanding plug 10 to a mandrel 5 turnable, inserting a tube stock 2 to the floating/expanding plug 10 with driving of an extruding member 6 and imparting bending force with a bending ring 11, the floating/expanding plug 10 is turnable and turned toward the bending direction of tube stock 2, the tube stock 2 is made to follow the cross section forming part 10f of floating/ expanding plug 10 and inserted therein.


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Inventors:
Tamio Nakano
Shin Takeda
Takeuchi St.
Masaru Nakamura
Application Number:
JP9869695A
Publication Date:
September 22, 2003
Filing Date:
April 24, 1995
Export Citation:
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Assignee:
Aisin Seiki Co., Ltd.
Masao Nakamura
International Classes:
B21C37/15; B21D9/03; B21D9/05; B21D39/20; (IPC1-7): B21D9/03; B21C37/15; B21D9/05; B21D39/20
Domestic Patent References:
JP5169145A
JP2268927A
JP7284855A
JP7214180A