Coining Sheet Metal

Metal coining is often a finishing process for manufactured products.

Coining sheet metal.

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. Coining fabrication is a basic type of bending in which the workpiece is stamped between the punch and die. 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. Coins metal currency are created with the coining process.

This is a flashless precision forging. And a brilliant surface finish. A simple round metal slug is placed into the die and forced to flow into a given shape by compressing it see figure 3. Metal coining is a forging process by which very fine and intricate details can be created on the surface of a work piece.

Coining also can reduce the metal thickness. Coining derives it name from coins as they have to be identical to make fake money distinguishable from the real one. Coining dies create the part s shape by squeezing the metal under extreme pressure. One disadvantage is that it takes a great deal of force to coin metal.

We provide a range of metal processing services including tube and steel bending for los angeles california and surrounding areas. It can produce sharp crisp corners. Because coining uses compression to form the part tension failure is unlikely. Special coining presses or knuckle presses are often used.

Coining has several advantages and disadvantages. 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. Sheet metal coining marking stamping applications overview clinching eclinching riveting joining fastener insertion assembling punching coining pressing reference projects. Both the punch tip and the punch actually penetrate into the metal past the neutral axis under a high amount of pressure.

The metal is given the die s exact shape by applying great tonnage. For instance if you want to get a 45 degree angle you need a punch and a die with the exact same angle. Hansen steel is an expert in metal forming tube bending cutting and fabrication for various markets throughout california. Coining may be used to control surface quality and detail on parts.