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Patent Searching and Data


Title:
DRAWING APPARATUS AND DRAWING METHOD
Document Type and Number:
Japanese Patent JP2010052038
Kind Code:
A
Abstract:

To provide a technology capable of forming a boss part thicker than a dehisced portion while utilizing the dehiscing work capable of preventing any breakage by suppressing the plastic deformation in a drawing apparatus and a drawing method.

This invention relates to the drawing apparatus 1 provided with: a mandrel 4 for mounting a base stock W on the distal end of a spindle; a chuck bar 3a for pressing the base stock W against the mandrel 4 at the position facing the spindle; and a roller for executing the drawing work on the base stock W. The drawing apparatus 1 includes: a dehiscing roller R1 as a roller which is moved in the inner-radial direction of the spindle to execute the dehiscing work of the base stock W from an outer circumferential part W1 of the base stock W; a forming roller R2 for forming a boss part B by pressing the dehisced portion W2 subjected to the dehiscing work against the chuck bar 3a; and a regulating means 3b for regulating the movement of the distal end W4 of the dehisced portion W2 in the axial direction of the spindle 2 during the forming by the forming roller R2.


Inventors:
MURATA SHIGEO
HIGAKI KOJI
Application Number:
JP2009058511A
Publication Date:
March 11, 2010
Filing Date:
March 11, 2009
Export Citation:
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Assignee:
NIPPON SPINDLE MFG CO LTD
International Classes:
B21H1/04
Domestic Patent References:
JP2003305527A2003-10-28
JP2001212626A2001-08-07
JPH09122816A1997-05-13
Foreign References:
US6427329B22002-08-06
Attorney, Agent or Firm:
Shuichiro Kitamura