Metal stamping (also known as stamping) is a process in which flat metal is put into a stamping mold in the form of a blank or coil to perform a stamping process. The surface of the stamping mold usually requires heat treatment to increase hardness. Punching includes forming various metal plates, such as punching, punching, embossing, bending, flanging and embossing using a punch or hydraulic press. This can be a single-engineering operation, where each process of the punching machine produces the desired shape on the sheet, or it can be automated stamping with a hardware continuous die. The stamping process is usually performed on metal plates, but it can also be used for other materials, such as plastic sheets such as polystyrene. The stamping progressive die is usually made of steel coils, which are used to feed the coils into a straightening machine to level the coils, and then into the feeder, which feeds the material into the press and presses through the metal stamping die for press forming. According to the complexity of the part, the stamping process and the number of stamping die stations can be determined.

   Metal stamping is usually cold stamped on a metal plate. Metal stampings mass produced bicycles in the 1880s. Metal stamping replaces die forging and machining, which greatly reduces costs. Although not as strong as the forged parts, they are of good enough quality.

   Stamped bicycle parts were imported from Germany to the United States in 1890. American companies then began to own presses customized by American machine tool makers. Western Europe was then able to stamp most stamped parts of bicycle hardware.

   Several automakers used hardware stampings before Ford Motor Company. Henry Ford rejected the engineer's suggestion and refused to use stamped parts, but when the company could not meet the demand for die forgings, Ford was forced to use stamped parts later.

   In the history of metal stamping, forging and deep drawing, various types of punches have been the backbone of metal manufacturing. Presses and interconnected automation equipment (automatic feeders, levelers) increase productivity, reduce labor costs, and provide factory workers with a higher level of safety.

Metal stamping process

Bend-The material deforms or bends along a straight line.

Flanging-The material bends along a curve.

Embossing-The material is stretched into shallow depressions by a stamping die. Mainly used to add decorative patterns.

Blanking-cutting a piece from a piece of material, usually used as a blank for further processing.

Embossing-The pattern is compressed or pressed into the material. Traditionally used to make coins.

Stretching-The surface area of the blank is stretched into another shape by a controlled flow of material. You can also see deepening.

Stretching-The surface area of the blank is increased by tension and moves inward without burrs. Usually used to make smooth body parts.

Cold extrusion-the material is extruded by a stamping die and the thickness is reduced along the vertical wall. For beverage cans and ammunition boxes.

Neck / Neck-Used to gradually reduce the diameter of the open end of a container or tube.

Curl-deformed material into a tubular profile. Door hinges are a common example.

Hemming-Folds the edge onto itself to increase thickness. The edges of the doors are usually crimped.

Stamping is usually performed on a punch. Progressive die stamping is the combination of the above-mentioned stamping processing technology into a stamping die. When the die is produced in one punch, the above-mentioned metal stamping and adding process is completed by a feeder at the same time.