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Title:
METHOD FOR MACHINING MATERIAL TUBE, APPARATUS FOR MACHINING THE SAME AND WORK TUBE
Document Type and Number:
Japanese Patent JP2011073015
Kind Code:
A
Abstract:

To provide a method for machining a material tube capable of reducing man-hour for work and improving work efficiency by eliminating welding connection or minimizing it, and also to provide a machining apparatus, and further to provide a work tube.

An apparatus for machining the material tube includes: a sealing tool water supplying machine 22 for mounting sealing tools at both the ends of the material tube having a first diameter and supplying liquid into the material tube; a hydrobending device 23 for bending the material tube to a bent tube while regulating the pressure of the internal liquid; a hydroforming device 24 for increasing pressure by further supplying the liquid into the bent tube at a state of mounting the sealing tools at both the ends of the bent tube and sealing the liquid therein and expanding a part of the bent tube till a second diameter to form a bent diameter expansion tube; and a sealing tool opening and water discharging machine 25 for discharging the liquid in the bent diameter expansion tube and removing the sealing tools.


Inventors:
YOSHINO TAMIO
SUZUKI HIDEHIKO
YAMAMURA YASUMI
Application Number:
JP2009225269A
Publication Date:
April 14, 2011
Filing Date:
September 29, 2009
Export Citation:
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Assignee:
YAMAHA MOTOR CO LTD
International Classes:
B21D51/16; B21D9/15; B21D26/033; B21D53/84
Domestic Patent References:
JPH057779A1993-01-19
JPH0284219A1990-03-26
JPS63256226A1988-10-24
JPS61262430A1986-11-20
JP2004283893A2004-10-14
JP2007209998A2007-08-23
JP2002219526A2002-08-06
Attorney, Agent or Firm:
Tsutomu Shimoichi