This is a cold working process, which means that the metal maintains its ductility and tensile strength, because it does not heat during the forming process, so the finished product has a round cross section, light weight, and good internal and external surface finishes.
Like flow-formed parts, shear-spinning products do not require welding, but are formed from a preform (a flat metal piece) called a blank. This metal can either have a hole in the middle or it can remain completely solid. In the former case, this will result in a rotating metal product with two openings-one above and one below.
In the latter case, the spinning product has only one opening. Many different metals can be shear-spun, including aluminum, steel, stainless steel, copper, and titanium. Common shear spinning products include rocket hose cones, gas turbine engines, and dish antennas. Heating, cooling, construction, food and beverage, agriculture, chemical and lighting industries also use conical metal products formed by shear spinning.
The shear spinning process begins with the manufacture of blanks, which are preforms made by deep drawing, stamping, or stamping. It is a flat piece of metal that has been carefully designed to ensure that there is enough material to form the dimensions of the final shape. The blank is then sheared by rollers on a rotating mandrel. In this process, spinning machines require more force than standard metal spinning machines.
When the diameter of the blank is constant, the thickness decreases with the angle of the mandrel and the gap between the roller and the mandrel. This is different from standard metal spinning, and there is no change in the thickness of the blank. The wall thickness of the part is customized according to certain stress requirements.
The inner and outer surfaces of the finished product are smooth and do not require any secondary processing, including additional polishing, polishing or polishing. No welding is required during the shear spinning process, and because the part is formed from a single blank, very little scrap metal is generated. Different metals have different degrees of spinnability, or the ability to perform shear spinning without achieving maximum tensile strength.