Precision Metal Stamping

Normally, stamping refers to a single operation where a portion of a part is formed in one machine before being moved onto another machine or set of machines. The process requires multiple dies on several pieces of equipment. Finishing and shaping are separate operations performed after the part has been through the various machines. Progressive stamping removes the need for multiple machines performing several functions and handling the workpiece in a single set of operations. A strip of rolled metal unrolls into a single die press with several stations that perform individual functions. Each station adds to what has been done previously resulting in a completed, finished part.

Progressive stamping simplifies the production of complex and intricate parts decreasing production time while increasing efficiency. Movements must be precisely aligned since the part is still connected to the metal roll. The first station separates the fabricated part from the rest of the metal. Progressive die stamping is ideal for long runs since the dies last longer and do not sustain any damage as a result of the process. As with several stamping processes, progressive stamping is repeatable. Each station performs a different cut, bend, or punch to gradually achieve the desired end shape and design. Progressive die casting is faster and has limited waste scrap.

Deep draw is a highly specialized process in metal stamping requiring properly equipped press equipment and engineering expertise. We have built a reputation in the industry as deep draw experts for manufacturing deep draw stamping parts. The deep drawing process is a forming process which occurs under a combination of tensile and compressive conditions. A flat sheet metal blank is formed into a hollow body open on one side or a hollow body is formed into a hollow body with a smaller cross-section.

Transfer die stamping uses a mechanical transport system to move the part from station to station. It is used for tube applications, frames, shells, and structural components. A die can be a simple single die or part of several dies lined up in a row. To perform transfer die stamping, the part is removed from the metal strip as it transfers between stamping stations. Transfer die stamping was developed to produce large parts and workpieces with the additional benefit of lower tooling costs.

Four slide, multislide, or four way stamping shapes the workpiece horizontally sliding it between four different tools. As the workpiece feeds, it is bent by each tool using a smooth set of processes. Each slide is driven by a shaft controlled by the rotations of a cam. The shafts are connected by a bevel gear with one electrical motor to power the shafts. The workpiece may be shaped with all tools working at once or in succession. The key to four slide stamping is the shafts, which allows the work piece to be shaped on all four sides.

Fine blanking is a special type of stamping that produces flatness and a sheared edge that is impossible with traditional stamping. Any secondary machining of parts is not required since profiles, web sections, and holes are completed in one process. To achieve the perfection of fine blanking, the blank is compressed between the upper and lower punches allowing the process to hold a very tight tolerance. The process is known for its high accuracy and smooth edges. It is done with hydraulic or mechanical presses or a combination of the two.

The three individual movements of the press are used to complete blanking - clamping, blanking, and ejection. Fine blanking presses operate at higher pressures requiring tools capable of withstanding those conditions. The total process is completed in a single cold stamping step.