Stampings is the process of cutting and forming metal alloys into specific forms, especially for use as components for large machinery or structures. Metal sheets can be molded into different pre-defined forms for use as food, as regular pots and jars. The most common alloys used in metal stamping steel, zinc, nickel, aluminum and titanium. Stampings is a very effective and productive means of production of many types of metal on a large scale.
In stamping, metal sheets are placed in a matrix or a press tool which is specially designed cavity that gives the preferred form of sheet metal. Upper part of the matrix is connected to the press slide while the lower component connects to the press bed. Specific component known as the blow pushes the sheet metal through the die, thus performing the actual development of the operation. After pressing, metal coated with gold, palladium, nickel or tin to prevent corrosion.
Coverage also increases wear and solderable nature of the product. Sometimes leaves are also pre-coated before the stamping process, and then purify the product from excess stamping oils and films. The product is then heat-treated to make it stronger, because it is still in soft condition after stamping. The product is then subjected to the process of deburring to remove sharp corners. This is done with chemicals or abrasives. Stampings also includes other processes such as metal-piercing, cleaning, shaping and drawing on the same machines.
Precision metal stamping is applicable to many industries like computers, electronics, electrical, dental, aerospace, instrumentation, military specs, defense, telecom and automotives. There are many methods in precision metal stamping for producing stamped prototypes. Blank creation is one such method. Blank creation involves the creation of a flat state of the component. The flat blank sheet is then used to make the part's features. In blank creation, there are many processes like nibbling, chemical etching, water jet cutting, wire EDM, punch and die.
Stamping presses have specific strength, speed and accuracy to give a definite form to the metal. There are two types of metal stamping presses: mechanical and hydraulic. They are available in a wide range of power, size, stroke length and operating speed.
Stampings are gradually replacing other metal forming processes, like casting, forging, fabrication and processing. One reason for this is the very low cost of metal stamping. Dies for stamping cost less than those used in the forging and casting. In addition, the metals used in metal stamping can be harder than those used in other processes, resulting in a final product stronger. The cost of secondary processes, like cleaning and plating is also significantly reduced.
In addition, there are certain foods that should be done only through a metal stamping: Base weights, brackets, balance clamps, brake flanges, conveyer flights, bushing seats, engine bases, flywheel shrouds and friction plates. There are also various types of stamping including: Deep drawn stamping, electronic stamping, embossing Fourslide, medical stamping, embossing and short-term, progressive stamping. The most commonly used type is a progressive drawing Die where the sheet metal passes through a series of stamps and stamping dies made all at once, thereby significantly reducing the time it takes.