By American Society for Metals, Joseph R. Davis, S. L. Semiatin
ASM instruction manual, Vol. 14: Forming and Forging
Provides an in-depth evaluate of a couple of procedures lately brought or that experience come into recognition comparable 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 improvement of thermomechanical processing, relatively with reference to aerospace alloys, and the improvement of strategies and checks to figure out steel workability/formability relationships.
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Additional info for ASM Metals Handbook, Volume 14: Forming and Forging
Protective equipment must be distributed and used by the operator to protect against injuries to the head, eyes, ears, feet, and body. 1. The forging machines should be equipped with the necessary controls to prevent accidental operation. This can be achieved through dual pushbutton controls and/or point-of-operation devices. Guards should be installed on all exterior moving parts to prevent accidental insertion of the hands or other extremities. Guards should also be installed to protect against flying scale or falling objects during the forging operation.
12b), a reversible electric motor is built directly on the screw and on the frame, above the flywheel. The screw is threaded into the ram or slide and does not move vertically. To reverse the direction of flywheel rotation, the electric motor is reversed after each downstroke and upstroke. Other Drive Systems. In addition to direct friction and electric drives, several other types of mechanical, electric, and hydraulic drives are commonly used in screw presses. A relatively new screw press drive is shown in Fig.
Generally, mechanical presses forge the preform and final shape in one, two, or three blows; hammers are capable of delivering up to ten or more blows at varying intensities. Drive Mechanisms In most mechanical presses, the rotary motion of the eccentric shaft is translated into linear motion in one of three ways: through a pitman arm, through a pitman arm and wedge, or through a Scotch-yoke mechanism. In a pitman arm press drive (Fig. 7), the torque derived from the rotating flywheel is transmitted from the eccentric shaft to the ram through a pitman arm (connecting rod).