Closed and Open Die Forging Processes and Applications
Forging is a manufacturing process where compressive forces are used to shape metals. Forged metal parts often differ in terms of their weight that can range anywhere from less than a kilogram to about 580 metric tons. Forging requires huge facilities and complex equipment to perform closed die forging and other different types of forging processes. Forging is very often classified according to the temperature at which the process is carried out such as hot, warm or cold forging. These products will require further processing in order to achieve a desired finished part.
What Is Open Die Forging?
Also known as the smith forging, the process involves striking or deforming a work piece placed on a stationary anvil. The dies in this process are flat and do not enclose the work piece. The operator or a machine will orient and position the work piece to achieve a desired shape. In smith forging, the dies are flat in shape or can also have specially shaped surface necessary for specialized operations. The process is employed for custom work, smithing, to roughen shapes, etc. Large parts measuring over two hundred pounds and eighty feet in length can be pressed or hammered into shape with this process. Almost all types of ferrous alloys, non-ferrous alloys and other materials such as corrosion resistant refractory alloys and age hardening super alloys can be open die forged.
Open Die Products
Apart from basic shapes such as square, round, hexagon, rectangle shapes, the open die forging processes can produce a wide range of products such as spindles, rotors, solid and step shafts, gear blank, hub, blanks for rings, cylindrical shaped hollows in different diameters, ring like parts in different thickness ratios, contour formed metal shells, etc. Open die products have their applications in defence sector, railways, farm equipments, material handling equipments, light and heavy industries.
What Is Closed Die Forging?
It is the process where hot metal is shaped within the walls of two dies that enclose a work piece on all sides. In this process a bar or a rod is cut into a specific length needed to fill the die. Several dies are used to achieve the final shape especially when large and complex shapes are required. This process too requires large production space and complex equipments like the double action air hammers, heat treating, cleaning and quality assurance facilities. With such facilities, products up to 450 lbs in weight can be forged. Closed die products have their application in various industries such as automobile, tractor and farm equipments, earth moving, electric transmission, petrochemicals and machine tools.
For more information about closed die forging and open die forging you may visit: http://www.canforge.com/open_die_plant.htm
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