New In tube end forming practices -- Can I downsize and then upsize a pipe end?

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Discussion Overview

The discussion focuses on the feasibility of a tube end forming process where a pipe is first downsized and then upsized at the same end. The specific parameters include a transition radius and material considerations, with an emphasis on practical applications in manufacturing.

Discussion Character

  • Exploratory, Technical explanation

Main Points Raised

  • One participant inquires about the possibility of reducing the diameter of a 55 OD ferritic steel pipe from 55 OD to 50.6 ID and then expanding it by 1mm diametrically, with a transition radius of 8mm.
  • Several participants affirm the feasibility of the proposed process without providing detailed explanations or conditions.
  • Another participant requests additional information or resources related to the topic.
  • A link to a resource on end forming and swaging dies is provided by a participant.

Areas of Agreement / Disagreement

There is general agreement among participants that the proposed tube end forming process is feasible, but the discussion does not delve into specific conditions or technical details that might affect this feasibility.

Contextual Notes

The discussion lacks detailed technical specifications or empirical data to support the claims of feasibility. Assumptions regarding material properties and the specific techniques used in the forming process are not fully explored.

Amol Joshi
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In tube end forming practices, is it possible to first reduce the diameter of the pipe (tube 0.9mm thick) and then expand it, at the same end, by about 1mm in total, with a transistion radius of 8mm ?
Please see attached image. Though it might be exaggerated, but the image should suffice.
I want to know the feasibility of it.
Material is Ferritic Steel. Of diameter 55 OD. The sizing is
1: Reducing to 50.6 ID and then
2. Expanding by 1mm diametrically.

Thank You.
 

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Yes.
 
Bystander said:
Yes.
Could you please give me some more information or links to resources I can refer.

Thank You.