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Title:
SYSTEM AND METHOD FOR FORMING OPENING TO PIPE
Document Type and Number:
Japanese Patent JP2014018864
Kind Code:
A
Abstract:

To provide an improved manufacturing method for forming slots on a pipe wall and a corresponding device for executing the method.

The first number of punches 2a arranged in a line penetrate a pipe wall, and slots 1a formed by the first number of punches continue to slots formed by the second number of punches 2b to be alternately arranged to form slots. In addition, when an internal support is used, small slots are first formed on the pipe wall while the internal support is in a pipe 10, and after the internal support is removed, the slots are spread to finish dimensions. The internal support can include an upper portion and a lower portion designed to engage into each other in a saw-toothed form or a wave form.


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Inventors:
KLAUS KALBACHER
BORST DANIEL
Application Number:
JP2013142499A
Publication Date:
February 03, 2014
Filing Date:
July 08, 2013
Export Citation:
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Assignee:
MODINE MFG CO
International Classes:
B21D28/28; B21D28/24; B21D51/16; B21D53/06
Domestic Patent References:
JPS56126037A1981-10-02
JPH0788572A1995-04-04
JP2003136156A2003-05-14
Foreign References:
DE19511491A11995-10-19
Attorney, Agent or Firm:
Shinjiro Ono
Yasushi Kobayashi
Shigeo Takeuchi
Osamu Yamamoto
Toru Miyamae



 
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