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The basic principle of spin forming
2025-04-16
The basic principles of spin forming can be summarized as follows:
Process Essence
A rotating wheel applies pressure point by point to a workpiece (metal sheet or tube) rotating at high speed around a mandrel, causing continuous localized plastic deformation to ultimately form a hollow rotating body part.
Equipment Structure and Movement
The equipment structure is similar to a lathe, including a mandrel (spindle), a roller frame, and a tailstock hydraulic cylinder.
The mandrel drives the workpiece rotation, and the roller applies pressure through radial and axial combined movements.
The deformation process features point-by-point continuous forming, similar to pottery wheel throwing.
Material Deformation Characteristics
Under pressure, the metal workpiece undergoes diameter contraction/expansion (ordinary spin forming) or wall thickness changes (high-strength spin forming).
Room temperature processing can improve material strength (tensile strength, fatigue strength, etc.), but will reduce plasticity.
Example Application Scenarios:
Lampshades and shell casings are made using ordinary spin forming.
Complex shells for aerospace applications often use high-strength spin forming.
Mold forming (positive/negative molds) in ceramic production (minor application)
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