What is Upsetting in Forging Die Design?

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SUMMARY

The discussion focuses on the concept of "upsetting" in forging die design, specifically its definition and application in mechanical engineering. Upsetting refers to the process of shortening the length of a bar of material while increasing its diameter to achieve the desired shape. The term "hot upsetting" is highlighted as a common practice, where materials are heated above their plastic deformation range to enhance material flow and reduce strength during deformation. Historical context is provided through the example of hot riveting in steel-hulled ship construction.

PREREQUISITES
  • Understanding of forging die design principles
  • Knowledge of material properties and plastic deformation
  • Familiarity with heating processes in metallurgy
  • Basic concepts of mechanical engineering
NEXT STEPS
  • Research "hot upsetting techniques in forging" for practical applications
  • Explore "material flow in forging processes" to understand deformation
  • Study "plastic deformation range of metals" for better material selection
  • Investigate "historical forging methods" like hot riveting for context
USEFUL FOR

Mechanical engineers, students studying forging processes, and professionals involved in die design and material processing will benefit from this discussion.

hemal1972
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hello, expert people,
i am fresh mechanical engineer.
right now i am reading about forging die design.

i can not understand one term. i.e. upsetting or upsetter. please explain me about it.
 
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It means shortening the length of a bar of material and increasing its diameter to make the required shape.

http://www.ustudy.in/node/2890
 
Last edited by a moderator:
Very commonly you will see "hot upsetting" which is self explanatory.
Due to the extent of deformation resulting in most industrial upsetting processes, it is necessary to improve material flow by reducing material strength - achieved commonly by heating the material to above its plastic deformation range before upsetting.
The hot riveting process used widely in the early days of steel hulled ship construction is a good example.
 

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