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Advantages of Stamping
Stamping is ideal for high part volumes and low unit costs.
Stamping is a good choice for products with annual volumes in the millions.
Stamping generally creates high-quality, durable parts.
Transfer Line Stamping
In a transfer line, either a blank of material or a continuous web of material is fed into a series of presses, each containing a stamping die. In low volumes, the part is carried from press to press manually or mechanically. In higher volumes, the part is attached to a metal carrier strip which moves forward one stage per stroke of the press. Almost any size and thickness of material can be stamped in a transfer line.
Used to form intricate parts from wire and coiled strip stock, four slide stamping is not as well-known as progressive die stamping. In four-slide stamping, the four cam-actuated forming slides are coupled together in the same press and produce multiple bends in more than one plane. The advantages of four slide stamping include reduced scrap and complex forming at a fraction of the tooling costs of a progressive die.
Deep drawing is a specialized metal stamping process to produce deep, hollow three-dimensional shapes. The blank enters a plastic state and stretches and thins as it is pulled over the die radius into the die. A part is “deep drawn” when the depth of the part is more than one-half of its diameter. A soda can is an example of a deep drawn part.
Fineblanking is a specialty stamping process that uses extremely precise dies to deliver part flatness that cannot be achieved with traditional stamping. Fineblanking produces cleanly sheared, straight cut edges and tolerances comparable to machining. Examples of fine blanked parts include gears and disk springs.
Progressive Die Stamping
A progressive die has all of the necessary stamping dies integrated into one die and loaded into a single press. All features of a part are created with a single stroke of the press and a single finished stamping is ejected with each stroke. A progressive die is limited to smaller parts and thinner material because the single press performs all stages of forming in a single stroke. But with all stages integrated into a single tool, setting up a progressive stamping production run requires only a single setup, and the high precision tools typically outlast transfer dies. Progressive stamping is also very fast, producing the lowest cycle times per part. Progressive die tooling is used to make parts for all industries requiring high precision combined with high speed production.
- Stainless Steel
Anodizing (Type II or Type III)
Aluminum stampings can be anodized. Type II anodizing creates a corrosion-resistant oxide finish on aluminum parts. Parts can be anodized in a wide variety of colors - black, red, clear and gold are most common. Type III is thicker than Type II and creates a more wear and corrosion resistant layer. Anodized coatings are not electrically conductive.
This is a process where powdered paint is electrostatically sprayed onto a part which is then baked in an oven. This creates a strong, wear- and corrosion-resistant layer that can be more durable than standard wet painting methods. Powder coatings are available in a wide variety of colors.
Metal Stampings can be wet painted in a wide variety of paint formulations and colors.
A chromate conversion coat can be applied to protect stampings from corrosion and improve adhesion of paints and primers. Chemical film conversion coatings are electrically conductive.
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Applications for Stamping
Automotive is the leading market for metal stampings at nearly 40% of the market. Chassis and engine components, transmission parts, under-the-hood parts, and exterior structural panels are stamped.
Demand is growing for stamped parts used in the manufacturing of machines.
The fastest growing market segment for stamped parts including parts for antennas and telecom products.
Overview: What is Stamping?
How Does Stamping Work?
Stamping can produce finished metal parts faster than any other metal working process. Hundreds of millions of stamped parts are produced for the appliance, electronic, and automotive industries every year. The stamping process combines conventional and/or progressive stamping tools (stamping dies) in punch presses to cut (blank) and bend (form) product out of sheet metal. A stamping press is a machine that powers the opening and closing of a matched die set. Stamping presses are fed a blank or a coil of material that is uncoiled and straightened before being fed to the press. The stamping process is ideal for high part volumes and low unit costs but incurs higher tooling costs. Hence, stamping is a logical choice for products with annual volumes in the millions and longer product life cycles.
Designing a stamped part requires a thorough understanding of the stamping process, its strengths and limitations. A designer considering a stamping should be willing to explore alternative part design, material selection and thickness. Utilizing design for manufacturing (DFM) software for stamping can assist the designer in lowering production costs. Specialized sheet metal forming simulation is also available which predicts the forming processes and can warn of common defects such as tears, wrinkles and other distortions.
Why Work With Xometry For Stamping?
Xometry partners with the most sophisticated metal stampers with the latest press technology to deliver high quality, high production, low cost stampings.
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