Explanation of spinning technology
2022-11-23
There are two kinds of spinning forming: ordinary spinning and powerful spinning. The spinning that does not change the blank thickness but only the blank shape is called ordinary spinning; That is, the spinning that changes the thickness and shape of the blank is called strong spinning. The spinning pressure required for powerful spinning is large, and the structure of spinning machine is generally complex. According to the movement direction of spinning wheel and metal, the power spinning forming can be divided into positive spinning forming and reverse spinning forming. The direction of motion of the rotating wheel is the same as the direction of metal flow, which is called positive rotation; Conversely, it is called anti rotation. For the same material, reverse spinning requires a lot of spinning. The spinning method shall be determined according to the shape and process requirements of the parts.
The selection of spinning frame depends on the requirements of spinning process and various forming process conditions. Spinning machine is divided into two types: powerful spinning machine and ordinary spinning machine. The powerful spinning machine is divided into two spinning wheels and three spinning wheels. There are also spinning machines with special parts in mechanical products, such as hot spinning machines, steel ball spinning machines, etc.
In mechanical products, how to save raw materials, improve product quality, reduce product weight, extend service life, reduce product manufacturing cost and energy consumption, and whether to shorten processing time has always been a concern. For example, "V" pulley (commonly known as "V" pulley) is one of the most widely used parts in mechanical transmission. If it can be formed by steel plate, it is of great significance. Compared with the traditional cast iron pulley, the simultaneous interpretation of the sheet metal pulley can save more than 70% of the raw materials. The sheet metal spinning pulley formed by deep drawing spinning is the latest and best pulley structure at present. The pulley not only has the above advantages, but also does not pollute the environment. It is widely used in mechanical products such as automobiles, tractors, harvesters, air compressors, etc. The blank of steel plate is processed through point to line and line to line plastic deformation using a special pulley spinning machine.
There are generally three basic forms of spinning pulley: folding pulley, split pulley and rolling multi v pulley (also called multi wedge pulley).
Compared with cast iron pulley, spinning pulley has the advantages of spinning technology (no chip processing), light structure, material saving, etc., and small moment of inertia. It is a new product of material saving and energy saving. High production efficiency (2-4 tablets per minute), good balance performance, and generally no balance treatment. Because the material flow line is not cut off, the surface is hardened by working, the structural density is increased, the strength and hardness of the groove surface are improved, the dimensional accuracy is high, the slip between the V-belt and the groove is small, and the belt life is long.
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2022-11-23
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