4020-F-2011-Lecture8-(Oct 4 - Prandtl-Reuss)

4020-F-2011-Lecture8-(Oct 4 - Prandtl-Reuss) - LHOLofi-Zou...

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Unformatted text preview: LHOLofi-Zou ' Lac/(rm 3 (90¢ 3,201! The figufvwe/M €We55 awoé fig ”0W3“ £2,529.99 * EZW‘ZE 1.) The, eqw‘vodeu} ghee; «‘s- a, COM‘MMDLHW W 'Jd‘re A‘vgf‘?‘ ‘ Scam z'uvocvx‘aw1L C}F H42 SMéS {SQ/MSW, Jcl/wd wewlces 140 H42 WMMLQ shrew, . AHW’H‘MQ MMDWH ac Roan/toga I I‘MUce/vfm¥ a? ofleur‘cuLc/Y £h~e9$ 1.) Tim aqw‘l/ode g how/c {5 4m §awce camimh'w, IomL becmm 02? POMSOM (6 thcwlt‘w PM, Me {WM W4 (V 2 (9.5 {M [claSo‘fC ‘I—«egfiM/a) l/Lofg com @wfllw pmfaafw 3> T119, mut‘uadem SW99 fig 9}?!fo OQ-QOQQ Wlk [Macslqb @Wfichw, 7W} f5 vow‘ucqt, wfveanwM/VO/ / Fund/mug , Wmmew‘quL ,~ deaf , &va.wit40& (WW‘OWMLQ flex/wW/w] 02H. 1+ We NOTHIWVEIIMD MW glee; .‘cz'Ld . l ”H We @ucaw «£0009 yam 7‘0 duff/02¢ C(QQQHWA WOOL as a.) H000 WW (/(0U96 fmuw'awe ”WWW a NDZUMOL WLI'LL, mil/lg] Siecb flow 2” +0 0,? ” {Landings M )0 “Cad flea gag/7402, {7&7le SMGS SWOLI‘VL CWO cowl {he Vfi/[I'g 4WWW f? ‘ (9‘35“ g" 2 SOKSI-é {mode m4 mm (M W 1 WW! 1% {Mia/W) W0C ate fwchm cow/#101W4” 0‘} Hue mafi/&[email protected] :r/LLUYLMCQ ”r; (WM/7W, UM (PW/OLGA“ CDCQ/ C(ueshow . Lou/veep mafia me 40 ‘H/LQ, PE.QXW.. @. Metallurgical Principles and Practice of Engineering (PE) Study Guide: Question #24 It Is the Policy of The MineralsI Metals 8: Materials Society (TMSl to Encourage the Professional Registration of Metallurgical Engineers. The following information is for both questions 23 8: 24. You have a 2 high/4 high reversing rolling mill. The hot rolls, which also serve as the 4 high back-up rolls, are 600 mm in diameter and the cold rolls are 150 mm in diameter. The roll width is 760 mm. The friction coefficient for hot rolling with this equipment and alloy is approximately 0.3 and the cold rolling coefficient of friction is 0.07. You are asked to hot roll a plate of cartridge brass (Cu-302n) 3 m long x 700 mm wide x 200 mm thick to a thickness of 12 mm at 800°C. The brass must then be cold rolled to 2 mm with a final yield stress of 500 MPa. The rolls are turning at 100 rpm. Using the information provided, answer the two following questions. The numerical values given in each question may not correspond with those calculated in the previous question. Make sure you read the caption on the accompanying figure. If the average flow stress at an intermediate stage of hot rolling to 12 mm is s’ = 50 MPa and the length of contact is 77 mm, then the approximate roll force (MN) would be most nearly: (A) 0.004 (B) 2.7 (C) 4,000 (0) 2.7x106 A flat rectangular shim is to be cold open die-forged perpendicular to the long dimension of a bar 0.350 inch high x 0.350 inch wide x 3.000 inch long. The final height is to be 0.100 inch.'The material is to be cartridge brass and it is desired to make the shim in one stroke. A 500- ton press is available and the initial approach is to use no lubrication. The starting material will be in the annealed condition and the final 0 part will be annealed before use. What is the approximate final length and width dimensions (inches) of the shim? (A) 3.000,1.225' (B) 3.000,0.100 (C) 0.100, 0.857 (0) 0.100, 3.000 NOTE THE : WE ENCOURAGE PROFESSIONAL REGISTRATION. evoluljcins per sEcdn‘d f one revqutinn of a , OTE As tEmpm‘aIure Incrmses,‘ V ‘ H ‘-' gas of imperature and: stain. ' , 20058003 ' “ meant] '1'200 .440 [9004,2013 ' flan—1,200 _, . . gnu—mun . ‘V_'217200e-l,‘2003 I ’ «81599302 2004,0011... , IT IS VERY GOOD TO HAVE. . 50.074323: la #1; (3/: {“773 V “hwjzi (5‘) 2 r: 1.15" Fri/1:76 WW 12mg (Flash M90751 HA Show 1H9 M4 so (flu/{WM M900 [email protected] M %W 0am m mag ire/ml [cowhwyaym CW' .w{4u W Wm 2% flawed) S igf’ash‘c’ at; [67“ 2(522*633>j “I [1. El( j Fm? 4’ Z912 " E 452+é‘”) 515 = 0&2“ ‘ fl 2? ' am a )] Wm ~’ [433‘ ii 33" " 30 W, flea/£2 vaflé £1719 Hwy/[4%. ; Mw cap v, Mrs 06 Va, 2W K c I y, (megmghc ace/9‘6 IQ /?. wmfél‘wd f0: Ha I/ OKIcNOQ’I‘Oe’l/L 7L0 fag ‘ «V «3‘me wag/914mg, g Nob lea JrWO/chofinw W WWOK [MW/WWW ", §MOOYLM 66C WW your/c ermH (Abe/08 7L0 (“Wag iql arm/[9,06 Tim We, flFwW/Oév rgwcp, WL'H/LQ, WpéCc Vlcf VIA/ILL ...
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