Quiz 5 solution - Name(PRINT& 21M'2 ELI/L g November...

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Unformatted text preview: '\ Name (PRINT) & 21M ['2 ELI/L g November 19,2012 Mechanical Engineering Technology 100 MET 4141-01: Machine Design I Quiz#5 Note: Closed booki- Time allowed 30 minutes. Must show necessary set up and calculations to get full credit. Each,_question carries equal weight. Always write the units in your answers. Draw a rectangular box around each answer. 1. Arrectangular bar is welded as shown but with welding 0 all 4 side with leg size of 7 mm. Calculate the factor of safety using MSST if a maximum 10a is applied as shown. The welding was done using E80XX electrodes (Su= 80 ksi, Sy= 67 ksi,1 ksi==6. 895 MPa). All dimensions are in mm. \9 57 .. 1,5] 96 f MA A “ Lf - Siw NE! . 1. I11 = Ad 1' :13 . WY - 05)( 0 a.) + .5.— = .00. + 1300133 , 2. Iu —. O'Dll333 Y“ LN: 26+2A= 2(Hos+o'2}= l‘r'h- _ 0 ; 7‘177 he’7’hm 1 ‘56:— 7 756 767(7) ‘7‘ ”‘3‘" _ MvC . 7 S’SBSon‘7/ N- " . - I , P (2:) 91W s/m, m A» amt/WM“ 3“” 4" ”’ em q‘ G7><Iu3 = x . 98% MI’ , (0119749 7)('m) ‘1: 5‘ Bl'thJS/OW’ W74 6/" MM ,‘ ‘umni ~..--—" 6 28'65 . 5, ;= 5*;12 i 7m”*&§-”f/‘ * “—7, i were"? (2“??? :I , I], _ - ‘ .asfgéogzd‘,+W/§y‘ 61,2] Zx31? 7‘33; - 35 66/ , 5.0/1Mfla., L’s/,2,” _67-63::€¥ . $ 53'(‘/‘('S‘0’9 : ”1 6:33:66, ”In, 62”). o; : '$€JII ’- mxfr—m Page] ' .- ay wor on the back side, if needed 9 Name (PRINT) W November 19, 2012 0:10 2. Two ACME power screws )‘(being used to load a cardboard press. Crest diameter for each is 1.0 inches, single threaded, with collar mean diameter is 1.5 inches. Coefficient of friction at both screw and collar are 0.18. Calculate: a) Pitch diameter b) Lead 1 l c) Torque required for pressing up to 30000 lbs. d) Verify if it is self locking (assuming collar friction not significant) @ Pl/zLdJann» dr‘ Ac“ .340" 0’ ML . w=3ooooab ,,0,~s(~7~/'0/ WMSW .r t 301612 ; mm“ ~ =1 , 6 ‘ I, QMMWw«Mé=WM%@Ww%z£E% dIo [M ['5 . f : Ye: : + :1 T 50'7‘5‘1/4C:OII8J fl 0 If '8'” ~ Cw ”mm X-hm 9.07/9 + #9) _—___________———————————"—'——. (n mMM -L'Iyfim 9.07/41 '35 = ISW’[ @5920 T / J W: 376K-11?“'W' WW zwwwrwwaw=.o¢' @ 73“, I" M 70 .mypllrJM’ryrl/M‘rvmry“ 6 @ Page 2 You may work on the bac S] e, if needed 9 7‘ 7F ('75) ...
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