A wide range of metallic materials including aluminum, iron, copper, stainless steel, titanium, molybdenum, etc., are applicable to CNC metal spinning. We adopt metal circular blanks and metal tubes as spinning workpieces.
Circular blanks are generally produced by laser cutting standard metal sheets, which fall into hot-rolled sheets and cold-rolled sheets. Cold-rolled sheets feature higher hardness yet superior spinning formability compared with hot-rolled sheets. Tiny internal voids tend to form inside hot-rolled stock before rolling, and such voids easily trigger cracks during spinning.
Tube blanks cover extruded tubes and welded tubes, both suitable for spinning processes. Extruded tubes deliver higher dimensional precision after spinning than welded tubes. It is essential for us to master the material properties of various metals used for spinning.
Metals such as aluminum, pure copper and iron exhibit better spinning performance than stainless steel, titanium and brass, primarily due to their superior ductility. All metals undergo work hardening and grain refinement during cold spinning. After spinning, the finished parts boast much higher strength with the same wall thickness compared with workpieces made via other processing methods. Higher material springback reduces the dimensional precision of formed products. Lower material hardness contributes to better surface finish after spinning forming.
Aluminum < Copper < Brass < Iron < Titanium < Stainless SteelHigher material hardness demands greater spinning force and accelerates wear of spinning mandrels and spinning rollers.
Aluminum > Pure Copper > Iron > Stainless Steel > Brass > TitaniumMetals with poorer ductility are more prone to cracking during metal spinning.
Aluminum < Copper < Brass < Iron < Stainless Steel < TitaniumMetals with high tensile strength require larger spinning forming force.
Aluminum < Copper < Brass < Iron < Stainless Steel < TitaniumInternal stress induces material springback and impairs forming precision. For this reason, dimensional accuracy is hard to control when processing stainless steel and titanium.
