American Made - Case Studies
How Metal Stamping Companies Create Metal Stampings
Metal Stamping Design
Metal stamping companies use a variety of sheet-metal forming manufacturing processes using a machine press or stamping press, the processes including punching, blanking, embossing, bending, forming, drawing, flanging, and coining. This could be a single stage operation where every stroke of the press create the desired form on the sheet metal part, or could occur through a series of stages. Stamping is an economical way to form metal components with variety of characteristics including strength, durability, and wear resistance. Also they will have good conductive properties and stability. The purpose of this design guideline is to provide some basic design concepts which could optimize all the features that a metal stamping company offers.
Metal Stamping Material Selection
Over-specifying a steel grade and blank thickness are major factors to drive up the cost of metal stamping. There are many choices of sheet and strip materials that will respond well to metal stamping and forming processes. However, the price and availability can vary in a wide range, so it has significant impact on the cost and delivery of production. The following are some key factors that should take into consideration when selecting the material and specifying physical characteristics of the material.
Metal Stamp Material Properties
There are many different ferrous and non-ferrous alloys available with different stock thicknesses and tolerances. The non-common alloys will be custom-produced by the steel mills, and they will only be available in the large quantities. It is possible to find someone who is using the material with the same specification for another application, but it would be a hit-or-miss, and it will have impact to the delivery schedules if missed. The quality of steel products has been improved greatly in the recent years. Continuous casting yields a very consistent and homogenous alloy mix. Today’s metal materials are more ductile and much more consistent, so the savings can be found from stock warehoused alloys instead of the more specified materials.
Metal Stamping Processes
The operations associated with stamping are blanking, piercing, forming, and drawing. These operations are done with dedicated tooling also known as hard tooling. This type of tooling is used in making high volume part of one design. By contrast, soft tooling is used in processes such as CNC turret presses, laser profilers and press brakes. All these operations can be done either at a single die station or multiple die stations — performing a progression of operations, known as a progressive die.