Forging

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Shape classification • More complicated parts have pronounced longitudinal axis and are curved in several planes. Suranaree University of Technology Tapany Udomphol Jan-Mar 2007
Preform design is the most difficult and critical step in forging design. Proper preform design assures defect-free flow, complete die fill, and minimum flash loss. mfge.atilim.edu.tr/ Upsetting - Metal flow consists only of two basic types • extrusion (flow parallel to the direction of the die motion) • upsetting ( flow perpendicular to the direction of the die motion). - However both types of metal flow occur simultaneously. - We need to identify the neutral surface since metal flows away from the neutral surface in a direction perpendicular to the die motion. See simulation http://www.qform3d.com/images/el ectrups/elecrups2.gif Metal flow during forging Suranaree University of Technology Tapany Udomphol Jan-Mar 2007
Page 1 and 2: Chapter 2 Forging Subjects of inter
Page 3 and 4: Introduction • Forging is the wor
Page 5 and 6: Forging operations Fullering is use
Page 7 and 8: Classification of forging processes
Page 9 and 10: Hammer and press forging processes
Page 11 and 12: Forging hammer or drop hammer Belt
Page 13 and 14: Power hammer • Power hammer provi
Page 15 and 16: Example: Hydraulic Press forging
Page 17 and 18: Typical values of velocity for diff
Page 19 and 20: Open-die forging • Open-die forgi
Page 21 and 22: Closed-die forging operation billet
Page 23 and 24: Example: Die set and forging steps
Page 25: Shape classification •The degree
Page 29 and 30: General considerations for preform
Page 31 and 32: www.nitrex.com Die materials Requir
Page 33 and 34: Die materials Die life can be incre
Page 35 and 36: Calculation of forging loads The to
Page 37 and 38: D o h o h D We have engineering str
Page 39 and 40: • Consider the force acting on a
Page 41 and 42: As the frictional force µσ y is u
Page 43 and 44: The total forging load, P, is given
Page 45 and 46: Example: The flash has high deforma
Page 47 and 48: In the case of sticky friction, if
Page 49 and 50: The mean forging load (in the stick
Page 51 and 52: Forming textures Redistribution of
Page 53 and 54: Residual stresses in forging • Th
Page 55 and 56: Typical forging defects www.mece.ua
Page 57 and 58: Summary • Mainly hot forging - Bl

Forging

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