Coining Sheet Metal

The metal is given the die s exact shape by applying great tonnage.

Coining sheet metal.

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. 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 the term comes from the initial use of the. Sheet metal coining marking stamping solutions overview clinching eclinching riveting joining fastener insertion assembling punching coining pressing reference projects. For instance if you want to get a 45 degree angle you need a punch and a die with the exact same angle.

Coining derives it name from coins as they have to be identical to make fake money distinguishable from the real one. Coining sheet metal coining fabrication is a basic type of bending in which the workpiece is stamped between the punch and die. The theory behind coining is that with enough tonnage your sheet metal will bend to the precise angle of your tooling so your tooling should be an equal match to. Both the punch tip and the punch actually penetrate into the metal past the neutral axis under a high amount of pressure.

For the coining process enough tonnage of the press brake will be used to conform the sheet metal to the exact angle of the punch and die. How are bending flanging coining embossing stretching curling hemming ironing necking and drawing related. The term coining is derived from the stamping method of the coin which also means get very high accuracy. Metal rolling metal extrusion metal drawing sheet metal powder processes metal coining metal coining is a forging process by which very fine and intricate details can be created on the surface of a work piece.

They all are common metal forming operations. 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. Coining may be used to control surface quality and detail on parts. Metal coining is often a finishing process for manufactured products.

Find out more about these processes in this final installment of stamping expert art hedrick s sheet metal stamping series. Coins metal currency are created with the coining process. A simple round metal slug is placed into the die and forced to flow into a given shape by compressing it see figure 3.