By Joseph R. Davis, S. L. Semiatin, American Society for Metals
ASM instruction manual, Vol. 14: Forming and Forging
Provides an in-depth assessment of a couple of strategies lately brought or that experience come into attractiveness corresponding to radial, rotary (orbital), precision, powder, and isothermal/hot-die forging. Plus superplastic sheet forming, and abrasive waterjet and laser slicing. New fabrics during this ebook (containing 1,200 illustrations and 250 tables) relates to the advance of thermomechanical processing, rather with reference to aerospace alloys, and the advance of ideas and exams to figure out steel workability/formability relationships.
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Extra resources for ASM Metals Handbook, Vol. 14: Forming and Forging (#06360G)
Society of Manufacturing Engineers, 1984 Selection of Forging Equipment Taylan Altan, The Ohio State University Introduction FORGING EQUIPMENT influences the forging process because it affects deformation rate, forging temperature, and rate of production. The forging engineer must have sound knowledge of the different forging machines in order to: • • • • • Use existing machinery more efficiently Define the existing plant capacity accurately Communicate better with, and at times request improved performance from, the machine builder.
The ram stroke is shorter than that of a forging hammer or a hydraulic press. Ram speed is greatest at the center of the stroke, but force is greatest at the bottom of the stroke. 7 to 142 MN (300 to 16,000 tonf). Fig. 6 Principal components of a mechanical forging press Mechanical forging presses have principal components that are similar to those of eccentric-shaft, straight-side, singleaction presses used for forming sheet metal (see the article "Presses and Auxiliary Equipment for Forming of Sheet Metal" in this Volume).
The tilting of the ram produces skewed surfaces and an offset on the forging; the stiffness influences the thickness tolerance. Under off-center loading conditions, two- or four-point presses perform better than single-point presses, because the tilting of the ram and the reaction forces into gibways are minimized. The wedge-type press, developed in the 1960s, has been claimed to reduce tilting under off-center stiffness. The design principle of the wedge-type press is shown in Fig. 8 in the article "Hammers and Presses for Forging" in this Volume.
ASM Metals Handbook, Vol. 14: Forming and Forging (#06360G) by Joseph R. Davis, S. L. Semiatin, American Society for Metals