Coining Sheet Metal

Coining fabrication is a basic type of bending in which the workpiece is stamped between the punch and die.

Coining sheet metal. Coining also is a leading producer of gold aluminum and copper bonding wire as well as jumper chips bonding pads tabs heat sinks lead frames solder spheres and cover assemblies for the microelectronics industry. Both the punch tip and the punch actually penetrate into the metal past the neutral axis under a high amount of pressure. And a brilliant surface finish. One disadvantage is that it takes a great deal of force to coin metal.

Coining has several advantages and disadvantages. We provide a range of metal processing services including tube and steel bending for los angeles california and surrounding areas. Coining in bending gives similarly precise results. A beneficial feature is that in some metals the plastic flow reduces surface grain size and work hardens the surface while the material deeper in the part retains its toughness and ductility.

Coining is a form of precision stamping in which a workpiece is subjected to a sufficiently high stress to induce plastic flow on the surface of the material. In coining the sheet metal is more than just bent it is actually thinned by the impact of the punch and die as it is compressed between them along the bending surfaces fig. This is a flashless precision forging. Metal coining is a forging process by which very fine and intricate details can be created on the surface of a work piece.

The term coining comes from the idea that when it comes to money each metal coin is made exactly the same as the last despite being mass produced. Because coining uses compression to form the part tension failure is unlikely. Coining dies create the part s shape by squeezing the metal under extreme pressure. Coining derives it name from coins as they have to be identical to make fake money distinguishable from the real one.

Coining also can reduce the metal thickness. Special coining presses or knuckle presses are often used. The metal is given the die s exact shape by applying great tonnage. Coins metal currency are created with the coining process.

Hansen steel is an expert in metal forming tube bending cutting and fabrication for various markets throughout california. For instance if you want to get a 45 degree angle you need a punch and a die with the exact same angle. A simple round metal slug is placed into the die and forced to flow into a given shape by compressing it see figure 3. It can produce sharp crisp corners.