Metal spinning technology, also known as metal spinning forming technology, uses rotation to move the force point from point to line and from line to surface, while applying a certain amount of pressure in a certain direction to deform and flow the metal material in that direction to form a certain shape. It includes two forms: strong spinning and ordinary spinning. Power spinning is a mature processing technology used for spinning and forming shells of various cylindrical and conical shapes. Ordinary spinning is the process of fixing a flat or hollow billet onto the mold of a spinning machine. While the billet is randomly rotated by the main spindle of the bed, a spinning wheel is used to apply pressure to the billet, causing local plastic deformation and completing processes such as deep drawing, flanging, necking, bulging, and curling of various shapes of rotating bodies. Low carbon steel, stainless steel, brass, pure copper, aluminum, and titanium metals can all be processed by metal spinning.

Spinning deformation force on the sheet

Metal spinning shape

The advantages of spinning process

1. High strength: Spinning forming belongs to integral forming technology, and the processed parts do not have busbar welds, maintaining the integrity of the billet. According to data, the strength and hardness of the material formed by spinning are increased by more than 30% compared to the base material. ‌

2. Low cost: Spinning forming technology does not require cutting of the billet, which can maximize the utilization of raw materials and avoid various wastes, resulting in high material utilization rate. The requirements for forming molds and processing equipment are simple, which can significantly reduce production costs.

3. High precision: By utilizing spinning technology, products are manufactured with high precision and precise dimensions, which can reduce processing errors and improve product quality.

4.Strong spinning can achieve high dimensional accuracy and surface smoothness in products. During the spinning process, the spinning wheel not only has a rolling effect on the metal being spun, but also has a leveling effect, resulting in a high surface finish of the product.

5.The range of products is very wide, and the same spinning equipment can perform spinning, jointing, curling, necking, finishing and other processing, thus producing multiple products. At the same time, the product specification range is large.

6.There are various types of raw materials that can be processed, including ordinary steel, stainless steel, aluminum, aluminum alloys, copper, as well as alloy metals containing titanium, molybdenum, tungsten, tantalum, niobium, which are difficult to deform.

7.Compared with sheet metal stamping, metal spinning can greatly simplify the equipment used in the process. Some parts that require multiple stamping can be manufactured by spinning once.

 The difference of hand spinning and CNC spinning

The CNC metal spinning develop based on hand spinning ,but many people don't know the difference of hand spinning and CNC spinning ,we will introduce the different details and make you know easily .

① Metal spinning mold 

CNC spinning need a higher precision mold than hand spinning .hand spinning like to use the material of hard nylon and 45# steel to make mold，but CNC metal spinning needs 45# and Cr12mov to make mold ,because CNC spinning mold bears more spun force than hand spinning ,the hand metal spinning mold can't bear CNC metal spinning force ,it will wear and deform quickly .

② Spinning path 

Hand spinning controls the spinning path by hand ,but CNC spinning controls the spinning path by CNC program ,hand spinning is easier to make sample ,but the production is not stable ,because hand force is not stable when spinner is tired in the production ,so hand force can't control the accuracy of the gap of spinning roller and mold ,it effects the accuracy of spun part ,CNC metal spinning controls the spinning path by CNC program.

③ The accuracy  of spun part 

● The accuracy of hand spinning mold  is lower than CNC metal spinning.

● The accuracy of hand spinning path is lower than CNC metal spinning.

● The force of hand spinning is less than CNC metal spinning.

So the accuracy of spun parts : hand spinning ＜ CNC metal spinning .

④ Spun thickness

CNC metal spinning machine can spin aluminum sheet over 6mm ,steel over 4mm,stainless steel over 3mm,but hand spinning just can spin aluminum under 1.5mm,steel under 1.2mm,stainless steel under 1mm.

So the sheet is thicker and harder ,the hand spinning can't spin it .

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⑤ Metal spinning application 

Hand spinning usually spin the product that don't need accuracy ,such as lampshade ,tableware ,vase. But CNC metal spinning make the product that accuracy is higher and the sheet is thicker. such as fan ,funnel ,automobile parts , military part, aircraft  parts (turbine /turbojet /tail jet / combustor/ liner ,aerospace part )＞＞.

⑤ Exterior surface 

The spindle speed of hand spinning is higher than CNC metal spinning ,so hand spinning can make a smoother surface than CNC spinning in thin sheet (such as aluminum thickness is less than 1.2mm. CNC spinning has a better surface in thick sheet spun .）

⑥ Production efficiency 

The production efficiency of CNC metal spinning is better than hand spinning ,many factory invest CNC spinning machine instead of hand spinner in different industry.

The Dienlis spinning machine adopts Siemens control system, the bed body adopts high-strength casting structure, and the main components are made of internationally renowned brands. The machine tool has stable and reliable performance, high degree of automation, high precision, and high production efficiency.