Close die forgings or impression die forging is the process of metal deformation that uses strain to shrink a part of metal to fill an enclosed die impression. In few processes a sequence of impression tools are used to alter the form of the material into the final wanted shape and form. The type of material, rigidity of specifications and require for heat treatment can determine the number of passes the product requires through the tooling.
Closed die forging is the shaping of hot metal within the walls of two dies (called tooling) that contain a pre cut profile of the desired part. Due to this method we can convert part from a oz. to 60,000 pounds. Close die forgings of steel, aluminum, brass and other metals can generate an almost unlimited variety of 3D forms that range in weight from simply ounces up to more than 25 tons. Impression die forgings are consistently created on hydraulic presses, mechanical presses and hammers with capabilities up to 40,000 tons, 10,000 tons and 40,000 pounds respectively. As the name indicates two or more tools including impressions of the part shape are introduced together as forging stock goes through plastic deformation. Because alloy circulation is restricted by the die shapes so that this process can generate more complicated forms and better tolerances than open die forging methods. Additional versatility in developing both symmetrical and non symmetrical forms comes from various performing operations (sometimes flexing) prior to forging in finisher tooling. Most engineering alloys can be created from standard impression die processes. The applications of these products are found in many different types of indutries. One function of impression die forging is the creation of fin around the forged element. During the layout of the steel forging process the volume of the first work piece is created a little bit higher than that of the impression die cavity.
Closed die forging is the shaping of hot metal within the walls of two dies (called tooling) that contain a pre cut profile of the desired part. Due to this method we can convert part from a oz. to 60,000 pounds. Close die forgings of steel, aluminum, brass and other metals can generate an almost unlimited variety of 3D forms that range in weight from simply ounces up to more than 25 tons. Impression die forgings are consistently created on hydraulic presses, mechanical presses and hammers with capabilities up to 40,000 tons, 10,000 tons and 40,000 pounds respectively. As the name indicates two or more tools including impressions of the part shape are introduced together as forging stock goes through plastic deformation. Because alloy circulation is restricted by the die shapes so that this process can generate more complicated forms and better tolerances than open die forging methods. Additional versatility in developing both symmetrical and non symmetrical forms comes from various performing operations (sometimes flexing) prior to forging in finisher tooling. Most engineering alloys can be created from standard impression die processes. The applications of these products are found in many different types of indutries. One function of impression die forging is the creation of fin around the forged element. During the layout of the steel forging process the volume of the first work piece is created a little bit higher than that of the impression die cavity.
