5.2.2 The Impression Die Process

Impression die forgings range in size from a few ounces to over 10,000 pounds, and vary in length from a fraction of an inch to over twenty-six feet. The process accounts for the vast majority of all commercial forging production. Impression die forging is sometimes called "closed die forging". However, although the terms are sometimes used interchangeably, this design guideline identifies closed die forging as a special form of impression die forging described below under the heading "flashless forging".

Impression die forging provides three-dimensional control of the workpiece, which provides much closer dimensional control than does open die forging. The control is achieved by a pair of matched dies with specially fabricated impressions, which form an impression, or cavity in the shape of the forging. The term "impression die" forging derives from the impressions.


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Impression die forgings range in size from a few ounces to over 10,000 pounds, and vary in length from a fraction of an inch to over twenty-six feet. The process accounts for the vast majority of all commercial forging production. Impression die forging is sometimes called "closed die forging". However, although the terms are sometimes used interchangeably, this design guideline identifies closed die forging as a special form of impression die forging described below under the heading "flashless forging".

Impression die forging provides three-dimensional control of the workpiece, which provides much closer dimensional control than does open die forging. The control is achieved by a pair of matched dies with specially fabricated impressions, which form an impression, or cavity in the shape of the forging. The term "impression die" forging derives from the impressions.


Return to Table of Contents

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Impression die forgings range in size from a few ounces to over 10,000 pounds, and vary in length from a fraction of an inch to over twenty-six feet. The process accounts for the vast majority of all commercial forging production. Impression die forging is sometimes called "closed die forging". However, although the terms are sometimes used interchangeably, this design guideline identifies closed die forging as a special form of impression die forging described below under the heading "flashless forging".

Impression die forging provides three-dimensional control of the workpiece, which provides much closer dimensional control than does open die forging. The control is achieved by a pair of matched dies with specially fabricated impressions, which form an impression, or cavity in the shape of the forging. The term "impression die" forging derives from the impressions.


Return to Table of Contents

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