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.

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. Metal coining is often a finishing process for manufactured products. For instance if you want to get a 45 degree angle you need a punch and a die with the exact same angle. Coining is a cold forming process where certain surface forms are produced with low material displacement.

Coins metal currency are created with the coining process. The term comes from the initial use of the process. Coining derives it name from coins as they have to be identical to make fake money distinguishable from the real one. Coining is a process in which the metal is compressed or squeezed into the desired shape or profile.

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 simple round metal slug is placed into the die and forced to flow into a given shape by compressing it see figure 3. The metal is given the die s exact shape by applying great tonnage. 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 may be used to control surface quality and detail on parts. And a brilliant surface finish. Coining dies create the part s shape by squeezing the metal under extreme pressure. 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.

The coins that you have in your pocket are a classic example of items made by coining. 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 has several advantages and disadvantages.

It can produce sharp crisp corners.