Free forging VS Die forging
Free forging is the use of impact or pressure to make the metal between the upper and lower anvil surface in all directions of free deformation, without any restrictions and obtain the required shape and size and certain mechanical properties of the forgings of a processing method, referred to as free forging
Die forging refers to the forging method of obtaining forgings by using moulds to shape the blanks on special die forging equipment.
Free forging is a traditional forging method, mainly relying on the skills and experience of the forging workers, through manual operation to heat and plastic deformation of the metal. This process is more flexible, according to the actual needs of the metal forging of any shape. While die forging is under the action of forging equipment, the use of moulds to make the metal to obtain the predetermined shape and properties. Die forging has the characteristics of high moulding precision and high production efficiency.
Comparison of features
|
Features |
Free forging |
Die forging |
|
Precision |
low precision |
high precision |
|
Production efficiency |
Low |
high |
|
Labour intensity |
high |
low |
|
Cost |
low |
High mold cost |
|
Machining allowance |
Large machining allowance |
Small machining allowance |
|
Application |
Only for repair or simple, small, small batch forging production |
Complex shapes can be forged Suitable for mass production |
|
Equipment |
Simple and versatile tools and equipment used |
Specialised die forging equipment is required |
Comparison of basic processes
1.Free forging: upsetting, elongation, punching, cutting, bending, twisting, misalignment and forging, etc.
2.Die forging: billet making, pre-forging and final forging.
