Coining Process In Sheet Metal

Because the sheet metal flows during the process of coining the bend radius formed by coining is always equal to that of the punch tip.

Coining process in sheet metal.

Stamping includes a variety of sheet metal forming manufacturing processes such as punching using a machine press or stamping press blanking embossing bending flanging and coining. And a brilliant surface finish. 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 in bending gives similarly precise results.

Metal coining is often a finishing process for manufactured products. A simple round metal slug is placed into the die and forced to flow into a given shape by compressing it see figure 3. Coining is a process in which the metal is compressed or squeezed into the desired shape or profile. The term comes from the initial use of the process.

The metal is given the die s exact shape by applying great tonnage. It can produce sharp crisp corners. 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. Coining derives it name from coins as they have to be identical to make fake money distinguishable from the real one.

For instance if you want to get a 45 degree angle you need a punch and a die with the exact same angle. The coins that you have in your pocket are a classic example of items made by coining. Coining is a cold forming process where certain surface forms are produced with low material displacement. Stamping is the process of placing flat sheet metal in either blank or coil form into a stamping press where a tool and die surface forms the metal into a net shape.

Coining also can reduce the metal thickness. Coining dies create the part s shape by squeezing the metal under extreme pressure. Sheet metal coining process is explained in this video to demonstrate each step of how the product is manufactured in the metalworking industry. Coins metal currency are created with the coining process.

During the coining process the material is put under enough pressure that the punch tip penetrates the material at the bottom of the bend and it begins to flow into the die.