Mechanisms and Mechanical Devices Sourcebook doc

... place and remove parts from annealing furnaces and punch presses, and they assemble and test electrical and mechanical products. Benchtop robots pick and place electronic components on circuit boards ... William J. Anderson and William Shipitalo of Nastec, Inc., and Wyatt Newman of Case Western Reserve University for Lewis Research Center. 48 IMPROVED ROLLER AND GEAR DRIV...

Ngày tải lên: 27/06/2014, 01:21

... positioning antenna reflectors, opening and closing security gates, handling materials, and raising and lowering scissors-type lift tables, machine hoods, and light-duty jib crane arms. Other linear ... input command for the desired output and the measured actual output. • In integral control the signal driving the motor equals the time integral of the difference between the input...

Ngày tải lên: 23/01/2014, 05:20

... drawings of feed mechanisms. Sclater Chapter 3 5/3/01 10:20 AM Page 62 73 TRAVERSING MECHANISMS FOR WINDING MACHINES The seven mechanisms shown are parts of different yarn- and coil-winding machines. ... off. Cutoff and transfer devices for glass tubes. The upper part of a rotating glass tube is held by a chuck (not shown). When the cutter cuts the tube to a given length, the mand...

Ngày tải lên: 23/01/2014, 05:20

... every lobe on gear 4, and T 3 /T 4 = L 3 /L 4 = 2/3, where T 3 and T 4 are the numbers of teeth on gears 3 and 4. T 1 and T 2 will denote the numbers of teeth on gears 1 and 2. Next, select the ... number of lobes L 3 and L 4 on the gears 3 and 4. In the drawings, L 3 = 2 and L 4 = 3. Any two lobes on the two gears (i.e., any two lobes of which one is on one gear and the...

Ngày tải lên: 23/01/2014, 05:20

... ARRANGEMENTS Differential, duplex, and other types of screws can provide slow and fast feeds, minute adjustments, and strong clamping action. Rapid and slow feed. With left- and right-hand threads, slide motion ... retains and drives a dowel pin for locking purposes. A right- and left-handed shaft (C) actuates a press. Sclater Chapter 6 5/3/01 12:25 PM Page 192 FLEXURES ACCURA...

Ngày tải lên: 27/01/2014, 14:20

... ROLLER CHAINS AND THEIR ADAPTATIONS Various roller, side-plate and pin configurations for power transmissions, conveying, and elevating. STANDARD ROLLER CHAIN—FOR POWER TRANSMISSION AND CONVEYING SINGLE ... 5 ⁄8 in and smaller have a spring-clip connect- ing link; those 3 ⁄4 in and larger have a cotter pin. MULTIPLE WIDTH—Similar to single-width chain. It is made in widths up to...

Ngày tải lên: 27/01/2014, 14:20

... clutch plates, gear fingers, and pinned members form the basis of these ingenious mechanisms. Mechanical stops are often required in automatic machinery and servomechanisms to limit shaft rotation ... 5/3/01 1:07 PM Page 345 356 MECHANICAL, GEARED, AND CAMMED LIMIT SWITCHES Limit switches are electric current switching devices that are operated by some form or mechanical motion...

Ngày tải lên: 27/01/2014, 14:20

... left-handed threads, • An eye on a shank with external right- handed threads, and • A flanged collar with left-handed external threads to mate with the shank of the first- mentioned eye, and right-handed ... position) by a spring within the handle. To some extend the plunger can slide forward against the plunger spring, and the handle can slide backward against the handle spring. A groo...

Ngày tải lên: 27/01/2014, 14:20

... the raising and lowering of the transport is accomplished by a cam. The shafts, F, E, and D are positioned by the frame of the machine. Special bell cranks support the transport and are interconnected ... hand out of the way), (4) are fail-safe, (5) are sen- sitive enough to operate instantly, and (6) render the machine inoperative if anyone attempts to tamper with them or remove the...

Ngày tải lên: 22/10/2012, 14:26

... every lobe on gear 4, and T 3 /T 4 = L 3 /L 4 = 2/3, where T 3 and T 4 are the numbers of teeth on gears 3 and 4. T 1 and T 2 will denote the numbers of teeth on gears 1 and 2. Next, select the ... number of lobes L 3 and L 4 on the gears 3 and 4. In the drawings, L 3 = 2 and L 4 = 3. Any two lobes on the two gears (i.e., any two lobes of which one is on one gear and the...

Ngày tải lên: 22/10/2012, 14:26