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upsetting

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Published: 30 September 2023
Figure 11.12: Upsetting of a long slab (lamina). (a) Plan view before and after upsetting between parallel anvils. (b) Theoretical calibration curves for coefficient of friction, μ . More
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Published: 01 December 2006
Fig. 6.5 Upsetting of a billet clamped on the press centerline (good), and upsetting of a billet resting in the container (poor) More
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Published: 30 September 2023
Figure 2.4: The consequences of friction illustrated in the upsetting of a cylinder. (a) Normal pressure and direction of shear stresses; (b) inhomogeneity of deformation. More
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Published: 30 September 2023
Figure 5.23: Squeeze-film development and breakdown in upsetting. Note that the sides of the cylinder roll into contact during deformation, with a low entrainment velocity. More
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Published: 30 September 2023
Figure 6.20: Polymer films, illustrating (a) failure in upsetting; (b) formation of transfer film in drawing; (c) shaving of a laminated layer. More
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Published: 30 September 2023
Figure 7.3: Squeeze films in (a) upsetting; (b) ring compression; (c) plane-strain compression; and (d) backward extrusion. More
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Published: 30 September 2023
Figure 11.4: Means of promoting fluid-film lubrication in upsetting. (a) Producing grooves to entrap lubricant; (b) use of a rimmed specimen; (c) conical impression. More
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Published: 30 September 2023
Figure 11.5: Upsetting between conical platens. More
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Published: 30 September 2023
Figure 11.6: Effect of lubricant on barreling in room temperature upsetting of aluminum alloy 7075 specimens. More
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Published: 30 September 2023
Figure 11.7: Folding over observed in unlubricated nonisothermal hot upsetting of steel. More
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Published: 30 September 2023
Figure 11.8: Deformation of a ring and pressure distribution in upsetting. (a) Original ring with dimensions; (b) low friction; (c) high friction. More
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Published: 30 September 2023
Figure 11.10: Upsetting of a flat slab with overhanging anvils. More
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Published: 30 September 2023
Figure 11.30: Shear stress and coefficient of friction measured in upsetting of aluminum with various lubricants. A - Dry; B - Oleic acid in mineral oil, abraded surface; C - same as B, but etched; D - lauric acid in mineral oil, etched; E - mineral oil, etched; F-MoS 2 ; G - soap. More
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Published: 30 September 2023
Figure 11.31: Coefficient of friction in upsetting of (a) low-carbon steel and (b) copper with various lubricants. A - mineral oil; B - lauric acid in mineral oil; C - oleic acid in mineral oil; D - same as C, but oxidized surface. More
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Published: 30 September 2023
Figure 11.33: Friction in hot upsetting of steel rings with dry lubricants. (a) Contact time of 18 ms, ϵ = 0.2; (b) contact time of 29 ms, ϵ = 0.5. More
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Published: 30 September 2023
Figure 11.37: Effect of die surface coating on wear in (a) upsetting and (b) forging around a boss. More
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Published: 30 September 2023
Figure 11.39: Friction measured in hot ring upsetting, with a reduction in thickness of 50%. More
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Published: 30 September 2023
Figure 11.40: Die pressures and shear stresses measured in upsetting of mild steel at 1000°C to 50% reduction in height ( d 0 = 35 mm; h 0 = 21 mm). 1 - Dry; 2 - graphite in water; 3 - copper in bentone grease. More
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Published: 30 September 2023
Figure 11.43: Friction in unlubricated ring upsetting of zinc and magnesium. More
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Published: 30 September 2023
Figure 11.44: Friction in unlubricated ring upsetting of copper and several brasses. More