Handbook of Machine Design P4

Ngày tải lên: 17/10/2013, 12:15

Ngày tải lên: 19/10/2013, 20:15

Ngày tải lên: 28/10/2013, 01:15

... ra, = mass of link i VI = linear velocity of center of mass of z'th link Ii = moment of inertia about center of mass for /th link co, = angular velocity of ith link 5 ... particular design. Elements of a cam system, as well as of other machine parts, are subject to wear. The proper choice of metal combinations may increase the l...

Ngày tải lên: 25/01/2014, 15:20

... combination of linkages at a limit; (/), (g) outputs derived from coupler curves. CHAPTER 39 A THESAURUS OF MECHANISMS L. E. Torfason Profesor of Mechanical Engineering University of ... drive. FIGURE 39.28 Robots. These are multidegree -of- freedom devices used for positioning or assem- bly of items. They usually have some degree of machine intelligence...

Ngày tải lên: 25/01/2014, 15:20

... frequency of the system coincides with the fre- quency of rotation of the machine imbalance, it will result in severe vibrations of the machine and the support structure. Consider a machine ... number of degrees of freedom is equal to the number of masses; and if motion in a plane is of interest, the number of degrees of freedom will eq...

Ngày tải lên: 25/01/2014, 15:20

... coeffi- cients of variation of 0.001 or less, and that of K/and M a is more than an order of magnitude higher, and so d is usually con- sidered deterministic. The distribution of a ... "A Probabilistic Model of Size Effect in Fatigue Strength of Rounds in Bending and Torsion," Transactions ofA.S.M.E., Journal of Mechanical Design, vol...

Ngày tải lên: 25/01/2014, 15:20

... diameter of worm d R Root diameter of worm D Pitch diameter of gear in central plane D b Base circle diameter D 0 Outside diameter of gear D 1 Throat diameter of gear / Length of ... number of teeth selected is governed by high ratios of reduction and considerations of strength and load-carrying capacity. 36.7.2 Number of Threads in Worm The mi...

Ngày tải lên: 25/01/2014, 15:20

... = limiting number of lines of contact, as given by n=( zi^ b} + F P X Also, PI = sum of base pitches in inches. The /th term of P 1 is the lesser of ip x taa\Vb or Z ... (lb/in)/in of face Z - length of line of contact in transverse plane e t = total effective alignment error, in/in p b - transverse base pitch, in F = net face width of n...

Ngày tải lên: 25/01/2014, 15:20

... and EID ratio of 0.15. Number of Gear Teeth, N Number of Pinion Teeth, n Number of Pinion Teeth, n Geometry Factor I FIGURE 34.47 Geometry factor / for durability of hypoid gears ... angle and EID ratio of 0.20. Number of Gear Teeth, N Number of Pinion Teeth, n Number of Pinion Teeth, n Number of Gear Teeth Read Up Number of Gear Teeth Read Down T...

Ngày tải lên: 25/01/2014, 15:20