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Fine Punching and Spinning

Fine Blanking

Precision punching is a high-tech stamping technology used to produce stamping parts with smaller dimensions, larger loads, and higher accuracy. It is a precision punching method developed from conventional punching technology.


The precision punching process includes three types of forces: punching force FG, ring gear force FR, and back pressure FS, making the precision punching technology different from other ordinary stamping or punching processes. The workpiece processed by precision punching has many advantages such as good verticality and a bright cutting section without tearing.


The workpiece is clamped by the edge pressing ring in the mold during the precision punching process, resulting in very small gaps and particularly flat parts. Usually, the cutting edges of the components do not require subsequent processing, with small warpage and good interchangeability.


After combining processing methods such as upsetting, sinking, semi punching, and extrusion, it gradually replaces many complex components that were originally made by conventional punching, forging, machining, casting, and powder metallurgy. After punching, multifunctional components can be assembled without the need for subsequent processing, resulting in significant production efficiency and cost advantages.


As early as 1923, it was invented and patented by German Fritz Schiess, and the world's first precision punching factory was opened in Switzerland in 1924. Since then, this technology has been kept confidential, providing components for clocks, sewing machines, typewriters, and more. It was not until the 1950s that precision punching technology began to be publicly popularized. Before the 1980s, it began to be applied to instruments, cameras, household appliances, and small hardware. Since then, precision punching technology has been widely used in the automotive and motorcycle industries, as well as the 3C electronics industry.


What parts are suitable for precision punching technology to produce?

Precision punching is widely used as a safety component in the automotive industry, ensuring stable operation and error free operation even in harsh and dangerous situations. The production of automotive precision stamping parts is mainly based on strong edge pressing precision stamping, with geometric shape, dimensional tolerance, positional tolerance, and shear surface quality far higher than ordinary stamping parts. There are more than 200 common automotive components, including powertrain components, such as transmission steel plates, engine sprocket chains, brake components, shock absorber parts, and camshaft adjustment device components; Seat height adjuster, seat angle adjuster, seat slide rail parts; Seat belt tensioner and lock components for airbags; Diesel engine fuel injection nozzle chuck, multi wedge pulley, valve plate for air conditioning compressor, torque converter clutch steel plate and clutch hub, planetary carrier and drive disc, brake disc, parking gear and pawl, clutch hub in the engine; Brake pads and wheel hub support plates in the chassis.


Components similar to the aforementioned components can also be produced using precision punching in industries such as machinery, medical, electronics, hardware, and electrical tools.


Spinning - Metal Spinning

Spinning is an advanced process that combines the characteristics of forging, extrusion, stretching, bending, ring rolling, cross rolling, and roll extrusion, with little or no cutting. Metal cylinder billets, flat billets, or prefabricated billets are tightly pressed onto the core mold of the spinning machine with a tail top, and the spindle drives the core rod and billet to rotate. At the same time, the spinning wheel squeezes the material onto the rotating core mold from one side of the blank, causing continuous plastic deformation of the material point by point, thereby obtaining hollow rotating parts with various busbar shapes.


Spinning technology is an ancient technique that is similar to rotating ceramic wheels to make clay bodies. It can be divided into two types: ordinary spinning and strong spinning forming. Spinning that does not change the thickness of the billet but only changes the shape of the billet is called ordinary spinning forming. Spinning that changes both the thickness and shape of the billet is called strong spinning forming.


Modern spinning technology originated in the military industry in the 1950s and then spread to the civilian industry, with widespread applications. Spinning can complete various complex sheet metal parts and is a special forming method that completes processes such as deep drawing, flanging, necking, bulging, and curling.


Compared with stamping, spinning is a less efficient processing method, but the mold is simple. Through programming, it can produce small batches, multiple varieties, complex shapes, and load-bearing metal parts. However, once the output of some spinning parts similar to heads is huge, the method of deep drawing and stamping is often used to replace and improve efficiency.


What industries and components are suitable for spinning?

Spinning has a wide range of applications, suitable for industries such as automobiles, military, diving, natural gas, lighting, mechanical manufacturing, home appliances, chemicals, wind power, aerospace, oil, natural gas, rail transit, road construction, advertising, metal processing, musical instruments, kitchenware, hotel supplies, etc. It is used to produce the following components: car/motorcycle/truck/bus wheels, spokes, wheel lock surfaces, rail vehicle wheels, natural gas tanks, CNG tanks, industrial gas cylinders, batteries, transportation and storage tools, fire extinguishers, reflective cups, fan components, cooking pots, separator components, tank bottoms, heads, fuel containers, transmission shafts, cylindrical fittings, precision pipes, hydraulic cylinders, clutch brackets Converter housing, hollow shaft, brake piston, multi V-belt pulley, flywheel starting gear, drive components with sealing ring groove, traffic signal pole, flagpole, precision aluminum alloy pole, road crossing pole, hollow shaft with groove, etc.


As a leader in the stamping industry, Shanghai Yixing has provided various precision stamping parts to customers around the world. We have professional mold engineers, advanced stamping equipment, mold processing centers, and a caring service awareness, all of which have laid a solid foundation for us in the stamping industry. Shanghai Yixing also produces various spinning products for customers, providing production methods for low quantity parts and reducing mold investment.

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