When it comes to forging, there are four main methods: impression die, cold, open die, and seamless rolled. What are the differences between the four methods? How do you know which one you should use? Well, let’s take a look at what the different types of forgings are and what their differences are.

Impression Die Forging

Impression die forging pounds or presses metal between two dies that contain a precut profile of the desired part. Parts from a few ounces to 60,000 lbs. can be made using this process. Steel, aluminum, titanium and other alloys can all be forged via impression die forging. They are routinely produced on hydraulic presses, mechanical presses, and hammers.

Cold Forging

Cold forging encompasses many processes, such as bending, cold drawing, cold heading, coining, extrusions and more, to yield a diverse range of part shapes. These include various shaft-like components, cup-shaped geometry‘s, hollow parts with stems and shafts, all kinds of upset and bent configurations, as well as combinations. The temperature of metals being cold forged may range from room temperature to several hundred degrees.

Open Die Forging

Open die forging is performed between flat dies with no precut profiles is the dies. Larger parts over 200,000 lbs. and 80 feet in length can be hammered or pressed into shape this way. Open-die forging comprises many process variations, permitting an extremely broad range of shapes and sizes to be produced.

Seamless Rolled Ring Forging

Seamless rolled ring forging is typically performed by punching a hole in a thick, round piece of metal, and then rolling and squeezing the donut into a thin ring. Ring diameters can be anywhere from a few inches to 30 feet.

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What are the different types of forgings?