Fineblanking-Fineblanking

Fine blanking is a high-tech stamping technology used to produce stamping parts with smaller dimensions, larger loads, and high precision. It is a precision blanking method developed on the basis of general blanking technology.

The fine blanking process includes three forces: blanking force FG, ring gear force FR, and back pressure FS, which makes fine blanking technology different from other ordinary stamping or blanking processes. Fine-blanking workpieces have many advantages such as good verticality and bright cut surfaces without tearing.

Because the workpiece is clamped by the blank holder in the die during the fine blanking process, the gap is very small and the parts are particularly flat. Normally, the cut edges of the parts do not need subsequent processing, and the warpage is small and the interchangeability is good.

After the combination of upsetting, counterboring, semi-punching and extrusion processing methods, it gradually replaces many complex parts and components originally composed of general punching, forging, machining, casting and powder metallurgy, and it can be assembled after punching. The functional parts do not require subsequent processing, and the production efficiency and cost advantages are very obvious.

As early as 1923, it was invented and patented by German FritzSchiess, and opened the world's first fine-blanking factory in Switzerland in 1924. Since then, this technology has been kept secret, providing clocks, sewing machines, typewriters, etc. Parts. It wasn't until the 1950s that fine-blanking technology began to be publicly popularized. Before the 1980s, it began to be used in instrumentation, cameras, home appliances and small hardware. Since then, fine-blanking technology has been widely used in the automotive and motorcycle industries and the 3C electronics industry. .

Which parts are suitable for fine blanking technology?

Fine blanking is widely used in safety components in the automotive industry to ensure stable work and error-free operation even under severe and dangerous conditions. The production of automobile fine-blanking parts is dominated by powerful blanking and precision blanking. The geometric shape, dimensional tolerance, form and position tolerance and the quality of the cutting surface are much higher than those of ordinary blanking parts. There are more than 200 common auto parts: power Assembly parts, namely gearbox steel sheet, engine sprocket chain, brake assembly, shock absorption parts and camshaft adjustment device parts; seat height adjuster, seat angle adjuster, seat slide rail parts; safety Locks with tighteners and airbags; diesel engine fuel injector chucks, poly-v-belt pulleys, valve plates for air-conditioning compressors, torque converter clutch steel plates and clutch gear hubs, planet carriers and drive discs in the engine , Brake discs, parking gears and pawls, clutch gear hubs; brake pads and wheel hub support plates in the chassis. Parts similar to the above-mentioned parts in machinery, medical, electronics, hardware, electrical tools and other industries can also be produced by fine blanking.

Spinning-MetalSpinning 

Spinning is an advanced technology that integrates forging, extrusion, stretching, bending, ring rolling, cross rolling, and rolling. Tighten the top of the tail on the core mold of the spinning machine, the spindle drives the mandrel and the blank to rotate, while the spinning wheel squeezes the material on the rotating core mold from the side of the blank, so that the material produces continuous plastic deformation point by point , So as to obtain a variety of bus bar shape hollow rotating body parts.

Spinning technology is an ancient technology, similar to turning a pottery wheel to make mud tires, and it is divided into two types: ordinary spinning and powerful spinning. Spinning that does not change the thickness of the blank but only changes the shape of the blank is called ordinary spinning, and the spinning that changes the thickness of the blank and the shape of the blank is called powerful spinning.

Modern spinning technology originated in the military industry in the 1950s, and then spread to the civilian industry, with a wide range of applications. Spinning can complete various complex sheet metal parts. It is a special forming method that completes deep drawing, flanging, necking, bulging and hemming.

Compared with stamping, spinning is a low-efficiency processing method, but the mold is simple, and through programming, it can produce small batches of multiple varieties, complex shapes, and heavy load. Since the output of spinning parts in the head is huge, the method of open-die drawing and deep-drawing is often used instead of improving efficiency.

Which industries and parts are suitable for spinning?

Spinning has a wide range of applications, suitable for automobiles, military industry, diving sports, natural gas, lighting, machinery manufacturing, home appliances, chemicals, wind power, aerospace, petroleum, natural gas, rail transit, road construction, advertising, metal processing, Musical instruments, kitchen utensils, hotel supplies and other industries are used to produce the following parts: automobile/motorcycle/truck/bus wheels, spokes, rim lock surfaces, rail vehicle wheels, natural gas tanks, CNG tanks, industrial gas bottles, batteries, transportation and Storage tools, fire extinguishers, reflectors, fan parts, cooking pots, separator parts, tank bottoms, heads, fuel containers, drive shafts, cylindrical pipe fittings, precision pipes, hydraulic cylinders, clutch brackets, converter housings, hollow shafts, Brake pistons, multi-V belt pulleys, flywheel starting gears, drive parts with sealing ring grooves, traffic signal poles, flag poles, precision aluminum alloy rods, crossing rods, hollow shafts with grooves, etc.