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Closed Die Forging

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Closed die forging is distinct from open die forging, in which the die only comes into contact with part of the workpiece at a time. Read More…

Closed Die Forging Closed die forging, also known as impression die forging, involves the pressing or hammering of preformed metal blanks into a set of dies shaped as a three dimensional negative of the part to be produced. In closed die forging the hammer and anvil fully enclose the workpiece, forcing the metal to fill all areas of the die. Closed die forging can produce a nearly limitless variety of 3-D shapes, and is capable of producing complex parts with tight tolerances.
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Leading Manufacturers

Freeport, IL  |  815-233-3833

Anchor Harvey is a one-stop, fully-integrated aluminum forge shop with in-house engineering to assist our customers bring their products to market faster. We’ve been producing dependable products since 1923, and we serve industries including aerospace, medical devices, recreational vehicles, and heavy equipment. When you choose Anchor Harvey, you choose dependability, competitive pricing, and the shortest lead time in our industry.

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Anchor Harvey $$$

Chicago, IL  |  800-932-0357

Although we have over 100 years of experience, we are committed to continually expanding our offerings in all industries. We are not content to remain as we are, but we continually work to improve our products and processes each and every day.

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Anderson Shumaker Company $$$

Mesa, AZ  |  818-486-1522

ZETWERK provides high quality forged components produced using range of ferrous and non-ferrous alloys. Our in-house forging expertise, together with our production partners, successfully supports demanding programs involving complicated part designs and project requirements. We also perform necessary secondary operations on the forged parts such as finish machining, heat treatment, surface treatment etc. ZETWERK is ISO 9001:2015 and AS9100D certified. Our forging plants are IATF 16949:2016 certified.

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ZETWERK $$$

Cleveland, OH  |  440-250-1900

For over 30 years, we have provided metal forged products for a wide variety of industries, including the aerospace, military, food service, medical, and automotive industries. Our customers know they can trust our forgings for quality and affordability.

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Ferralloy Inc. $$$

Jefferson, OH  |  888-536-3674

Here at Ken Forging we are a family-owned business who offers our customers high quality forgings. We require no minimum orders and our forgings come in a variety of materials including: stainless steel, carbon steel and more. We provide outstanding technical support and our teams are here to meet your needs by providing same day shipping. You can trust the experts at Ken Forging. Contact us today for more information!

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Ken Forging $$$

Cincinnati, OH  |  888-321-7200

For over a century, we have manufactured metal component parts for OEMs utilizing the forging process for strength and integrity. We offer forgings of carbon, alloy, stainless and tool steels, aluminum, high-temperature and specialty metals. We provide hammer, press and upset forging.

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Queen City Forging Company $$$

McKees Rocks, PA  |  800-223-2818

McKees Rocks Forgings is a producer of forged circular products. Our high quality items are suitable for use in many industrial applications. We specialize in crane wheels, industrial wheels, sheave wheels and gear blanks. Custom products are available and we are able to meet any standard forging specs as well as many other closed-die circular forging projects. A range of materials is available.

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McKees Rocks Forgings, Inc. $$$
placeholder image Anchor Harvey Anderson Shumaker Company ZETWERK Ferralloy Inc. Ken Forging Queen City Forging Company McKees Rocks Forgings, Inc.

Initial costs for developing the processes and tooling for closed die forging can be quite high, but it is the most cost-effective forging method for high volume production, since recurring costs for each part are very low. In addition, closed die forging is capable of producing both symmetrical and non-symmetrical parts.

Materials that frequently undergo closed die forging processes include high alloy steel, naval brass, carbon steel, aluminum, alloy metals, stainless steel, copper, nickel, tool steel and titanium. Closed die forgings are used particularly often by industries such as electronics, aerospace, automotive, commercial, manufacturing, semiconductor, construction, hardware and food processing.

Closed die forging machines consist of two tooling dies: a stationary die (anvil) and a moving die (hammer). Both dies contain an impression of the desired part shape. The moving die presses down onto the stationary die and the metal workpiece and causes the metal to flow into every part of the die and take its shape.

A small amount of excess metal flows into a thin recess at the edges of the two dies called a flash gutter; the flash cools quickly and then serves as a plug keeping the rest of the metal in the die. Often, closed die forging requires that the workpiece be moved through a series of impression cavities, at first forming the rough shape, then proceeding until a finisher cavity turns out the final product.

The closed die forging process can be done with cold forging, hot forging or warm forging. In cold forging the metal is not directly heated, but formed using high pressure. In hot forging the metal is heated to high temperatures then formed. In warm forging the metal is heated to a range that is typically above room temperature, but below the re-crystallization temperature of the metal.

Closed die forging is the most common method of forging utilized in the industry to produce intricate and difficult geometries, offering countless possibilities for creating high strength components and tools with precision.

Closed Die Forging Informational Video