Stamping die and hardware stamping overview and origin

Metal stamping (also known as stamping) is the process of placing flat metal in the form of blank or coil into a stamping die for stamping processing, where the surface of the stamping die usually needs to be heat-treated to increase hardness. Stamping involves the punching, cutting, embossing, bending, flanging and embossing of various sheet metals using punches or hydraulic presses. This can be a single engineering operation, where each engineering of the punch produces the desired shape on the sheet, or it can be an automated stamping process with a hardware continuous die. The stamping process is usually carried out on sheet metal, but can also be used for other materials, such as plastic sheets such as polystyrene. The stamping progressive die is usually made of steel coil, used to feed the coil into the straightening machine to level the coil, and then into the feeder, the feeder will feed the material into the press through the metal stamping die for stamping processing. According to the complexity of the parts, the stamping process in the stamping die can be determined, and the number of stamping die stations.

Metal stamping is usually formed by cold stamping on sheet metal. Metal stamping parts were mass-produced for 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 to the United States from Germany in 1890. American companies then began to have presses customized by American machine tool manufacturers. At that time, Western Europe was able to press and process most of the bicycle hardware stamping parts.

Several automobile manufacturers adopted metal stamping parts before Ford Motor Company. Henry Ford rejected the advice of his engineers to use stamped parts, but when the company could not meet the demand for die forgings, Ford was forced to use stamped parts later.

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

Metal stamping process

Bending - Material deforms or bends along a straight line.

Flanging - Bending the material along a curve.

Embossing - The material is stretched into a shallow depression by the stamping die. It is mainly used to add decorative patterns.

Blanking - Cutting a piece from a piece of material, usually used for further processing.

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

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

Stretch - The surface area of the blank is increased by tension, without the inward movement of rough edges. Usually used to make smooth body parts.

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

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

Crimping - deforming the material into a tubular profile. Door hinges are a common example.

Crimping - Folding an edge over itself to increase thickness. The edges of a car door are usually rolled.

The stamping process is usually carried out on the punching machine. Progressive die stamping is to combine the stamping process into a stamping die. When the die is produced in one punch, the metal stamping process is completed through the feeding machine at the same time.



Stamping lubricant

The metal stamping process creates friction, which requires the use of lubricants to protect the workpiece and stamping die surface from scratches or wear. The lubricant also protects sheet metal and finished stamped parts from the same surface wear and promotes elastic material flow to prevent cracking, tearing or wrinkling. A variety of lubricants are available for this task. They include plant and mineral oil based, animal fat or lard, graphite based, soap and acrylic based dry film. The latest technology in the industry is polymer-based synthetic lubricants, also known as oil-free or non-oil lubricants. The term "water-based" lubricants refers to a larger category that also includes more traditional oil and fat-based compounds. Dongguan Changdong Mold Co., Ltd. specializes in the development and manufacture of stamping molds, good at the development and production of domestic electronic products within 4 meters hardware molds and large automobile molds.