stanchion paper roll mandrel base FIGURE P3-12 ramp

Transcription

1 1 MCHINE DESIGN - n Integrted pproch stnchion pper ro mndre se FIGURE -1 roem -7 rmp FIGURE -1 roem -8 1-ft grid -0 Run the computer mode CSE for Cse Study (on the CD-ROM in sever nguges) nd move the point of ppiction of the crimp force ong the jw, reccute, nd oserve the chnges to the forces nd moments dimensions in inches FIGURE -1 roem - Section - Ch 0 ed Fin revised 1

2 Chpter LOD DETERMINTION 1 erings re sef-igning so ct s simpe supports FIGURE -15 roems - nd -5-1 Run the computer mode CSE for Cse Study (on the CD-ROM in sever nguges) nd move the point of ppiction of ong the x direction, reccute, nd oserve the chnges to the forces nd moments on the inks. Wht hppens when the vertic force is centered on ink? so, chnge the nge of the ppied force to crete n x component nd oserve the effects on the forces nd moments on the eements. - Figure -1 shows cm nd cm-foower rm. If the od = 00, wht spring force is needed t the right end to mintin minimum od etween cm nd foower of 5? Find the mximum sher force nd ending moment in the foower rm. ot the sher nd moment digrms. - Write computer progrm or eqution-sover mode to ccute the singurity functions isted in equtions.17. Set them up s functions tht cn e ced from within ny other progrm or mode. - em is supported nd oded s shown in Figure -15. Find the rections, mximum sher, nd mximum moment for the dt given in the row(s) ssigned from Te -. * -5 em is supported nd oded s shown in Figure -15. Write computer progrm or eqution-sover mode to find the rections nd ccute nd pot the oding, sher, nd moment functions. Test the progrm with the dt given in the row(s) ssigned from Te em is supported nd oded s shown in Figure -16. Find the rections, mximum sher, nd mximum moment for the dt given in the row(s) ssigned from Te -. Te - Dt for roems - Through -1 Row (in) (in) (in) () or p (/in) c d e f * nswers to these proems re provided in ppendix D. Ch 0 ed Fin revised 1

3 1 MCHINE DESIGN - n Integrted pproch p erings re sef-igning so ct s simpe supports FIGURE -16 roems -6 nd -7-7 em is supported nd oded s shown in Figure -16. Write computer progrm or eqution-sover mode to find the rections nd ccute nd pot the oding, sher, nd moment functions. Test the progrm with the dt given in the row(s) ssigned from Te em is supported nd oded s shown in Figure -17. Find the rections, mximum sher, nd mximum moment for the dt given in the row(s) ssigned from Te em is supported nd oded s shown in Figure -17. Write computer progrm or eqution-sover mode to find the rections nd ccute nd pot the oding, sher, nd moment functions. Test the progrm with the dt given in the row(s) ssigned from Te em is supported nd oded s shown in Figure -18. Find the rections, mximum sher, nd mximum moment for the dt given in the row(s) ssigned from Te em is supported nd oded s shown in Figure -18. Write computer progrm or eqution-sover mode to find the rections nd ccute nd pot the oding, sher, nd moment functions. Test the progrm with the dt given in the row(s) ssigned from Te -. p ger d T cst iron roer 0.1 FIGURE -17 roems -8 nd erings re sef-igning so ct s simpe supports Ch 0 ed Fin revised 1

4 Chpter LOD DETERMINTION ger ger key T d erings re sef-igning so ct s simpe supports FIGURE -18 roems -0 nd kg speedot reches speed of 16 kph t the instnt it tkes up the sck in 100-m-ong tow rope ttched to surford crrying 100-kg pssenger. If the rope hs k = 5 N/m, wht is the dynmic force exerted on the surford? - Figure -19 shows n oi-fied pump jck. For the position shown, drw free-ody digrms of the crnk (), connecting rod () nd wking em () using vrie nmes simir to those used in Cse Studies 1 nd. ssume tht the crnk turns sowy enough tht cceertions cn e ignored. Incude the weight cting t the CG of the wking em nd the crnk ut not the connecting rod. - For the pump jck of roem - nd the dt of Te -, determine the pin forces on the wking em, connecting rod, nd crnk nd the rection torque on the crnk. Te - roem - R R R R R F ce 970 W 598 W 706 θ 98.5 hed end x B 6.9 CG counter weight B-CG =.00 -CG = 1. O -CG = 79. O Y ce 1 ω pump rod counterweight 1 X O we hed FIGURE -19 roems - nd y iner dimensions re in inches Ch 0 ed Fin revised 15

5 16 MCHINE DESIGN - n Integrted pproch O Y 1 y X. O x B FIGURE -0 roems -5 nd 6 iner dimensions re in mm Te - roem -6 R R W 5 N θ θ Figure -0 shows n ircrft overhed in mechnism in end view. For the position shown, drw free-ody digrms of inks nd nd the door () using vrie nmes simir to those used in Cse Studies 1 nd. There re stops tht prevent further cockwise motion of ink (nd the identic ink ehind it t the other end of the door) resuting in horizont forces eing ppied to the door t points. ssume tht the mechnism is symmetric so tht ech set of inks nd crry one hf of the door weight. Ignore the weight of inks nd s they re negigie. -6 For the overhed in mechnism of roem -5 nd the dt of Te -, determine the pin forces on the door (), nd inks & nd the rection force on ech of the two stops. -7 prticur utomoie whee suspension consists of two -rms, the whee (with tire), coi spring, nd shock sorer (dmper). The effective stiffness of the suspension (ced the ride rte ) is function of the coi spring stiffness nd the tire stiffness. The -rms re designed to give the whee nery vertic dispcement s the tire rides over umps in the rod. The entire ssemy cn e modeed s spring-mss-dmper system s shown in Figure -15(). If the sprung mss (mss of the portion of the vehice supported y the suspension system) weighs 675, determine the ride rte tht is required to chieve n undmped ntur frequency of 1. Hz. Wht is the sttic defection of the suspension for the ccuted ride rte? * -8 The independent suspension system of roem -7 hs n unsprung weight (the weight of the xe, whee, -rms, etc.) of 106. Ccute the ntur frequency (hop resonnce) of the unsprung mss if the comined tire nd coi spring stiffness (ride rte) is 1100 /in. -9 The independent suspension system of roem -7 hs sprung weight of 675 nd ride rte of 15 /in. Ccute the dmped ntur frequency of the sprung mss if the dmping coefficient of the shock sorer is constnt 1 -sec/in. * nswers to these proems re provided in ppendix D. -50 Figure - shows powder compction mechnism. For the position shown, drw free-ody digrms of the input rm (), connecting rod () nd compcting rm () Ch 0 ed Fin revised 16

6 Chpter LOD DETERMINTION 17 spring dmper -rm frme whee -rm tire FIGURE -1 roems -7 through 9 Viper suspension - Courtesy of DimerChryser Corportion X 5 E 57 F in 60.6 F Te -5 roem -51 B = 105 C = 0.6 BD = 17 engths in mm Y F comp 165 R R 1E R 1F R R R R R in R FIGURE - 7 F comp 100 N θ 5.6 roems -50 nd -51 Ch 0 ed Fin revised 17

7 18 MCHINE DESIGN - n Integrted pproch 5 FIGURE - roems -5 nd -5 Te -6 roem -5 R R R R R R R R R F 85 N θ θ using vrie nmes simir to those used in Cse Studies 1 nd. ssume tht the input rm turns sowy enough tht cceertions cn e ignored. Ignore the weights of the rm, connecting rod, nd compcting rm. Negect friction. inks re symmetric with CG in the center. -51 For the compction mechnism of roem -50 nd the dt of Te -5, determine the pin forces on the compcting rm, connecting rod, nd input rm. The position vectors (R xx ) in the te octe points of force ppiction on ink versus the CG of the ink on which the force cts. inks re symmetric with CG in the center. -5 Figure - shows drg ink sider crnk mechnism. For the position shown, drw free-ody digrms of inks through 6 using vrie nmes simir to those used in Cse Studies 1 nd. ssume tht the crnk turns sowy enough tht cceertions cn e ignored. Ignore the weights of the inks nd ny friction forces or torques. inks re symmetric with CG in the center. -5 For the drg ink sider crnk mechnism of roem -5 nd the dt of Te -6, determine the pin forces on the sider, connecting rods, nd crnk nd the rection torque on the crnk. The position vectors (R xx ) in the te octe points of force ppiction on ink versus the CG of the ink on which the force cts. inks re symmetric with CG in the center. Ch 0 ed Fin revised 18