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types of gear manufacturing processesFull description
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GUITAR TABDescripción completa
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The handbook contains procedure to design gears Spur Gear Helical Gear Bevel Gear Worm gear Step by step problem solving and design technique examples included
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worm gearsFull description
Turning gears simulation is an ethical game.
Aplikasi Roda Gigi Spur GearsFull description
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This paper investigates the motion of gears with uneven surfaces (often called "cams"). It specifically investigates the case of spiral-shaped cams.Full description
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Typical Heat TreatmenFull description
LIST OF PROBLEMS AND HOME ASSIGNMENTS: 1. Two mating spur gears with module pitch p itch 65 mm have 19 and 47 teeth of 20º pressure p ressure angle and 6.5 mm addendum. Determine the number of pairs of teeth in contact and the angle turned through by the larger wheel for one pair of teeth in contact. Determine also the ratio of sliding velocity to rolling rolling velocity at the instant (a) engagement commences (b) the engagement terminates and (c) at a pitch point 2. In an epicyclic gear train, the internal wheels A and B and compound wheels C and D rotate independently about axis O. The wheels E and F rotate on pins fixed to the arm G. E gears with A and C and F gears with B and D. All the wheels have the same module and the number of teeth are : TC= 28; TD= 26; TE= TF= 18. 1. Sketch the arrangement ; 2. Find the number of teeth on A and B ; 3. If the arm G makes 100 r.p.m. clockwise and A is fixed, find the speed of B ; and 4. If the arm G makes 100 r.p.m. clockwise and wheel A makes 10 r.p.m. counter clockwise ; find the speed of wheel B. 3. Fig shows a differential gears used in a motor car. The pinion A on the propeller shaft has 12 teeth and gear with the crown gear B which has 60 teeth. The shaft P and Q from the rotor axles to which the road wheels are attached. If the propeller shaft rotaes at 100 rpm. And road wheel attached to axle Q has a speed of 210 rpm. While taking a turn , find the speed of road wheels attached to axle P. 4. A pair of involute spur gears with 16 pressure angle and module of 6mm is in mesh.
The member of teeth on pinion is 16 and its rotational speed is 240 rpm. When the gear ratio is 1.75 in order to avoid interference, find (i) The addenda on pinion and gear wheel, (ii) The length of path of contact, (iii) The maximum velocity of sliding of teeth on either of the pitch point. (AU May/June 2006)
5. An epicyclic gear train consists of a sun wheel S, a stationary internal gear E and three identical planet wheels P carried on a star- shaped planet carrier. The size of different th tooth wheels are such that the planet carrier C rotates at 1/5 of the speed of the sun wheel S. the minimum number of teeth on any wheel is 16. The driving torque on the sun wheel is 100Nm. Determine (i) Number of teeth on different wheels of the train, (ii) Torque necessary to keep the internal gear stationary. (AU April/May 2005)
6. Two gear wheels mesh externally to give a velocity ratio of 3 to 1. The involute tooth has 6mm module and 20 pressure angle. Addendum is equal to one module. The pinion rotates at 90rpm. Determine (i) number of teeth on pinion to avoid interference and the corresponding number on the wheel. (ii) The length of path and arc of contact (iii) contact ratio, 0iv) the maximum velocity sliding.
7. An epicyclic gear train consisting of fixed sun gear S with 50 teeth meshing with a planet gear, P with 40 teeth. The planet gear meshes with a ring gear, R with 60 teeth. Determine the speed of the ring gear when the arm, A which carries the planet gear rotates at a speed of 100rpm clockwise about the sun gear center axis.
8. A pair of 20 full depth involute spur gear having 30 and 50 teeth respectively of module 4mm are in mesh. The smaller gear rotates at 1000rpm. Determine (i) sliding velocity at engagement and at disengagement of pair of the teeth. (ii) Contact ratio.
9. Derive the Law of gearing. (AU May/June 2006
TEST 01: Part A 1. 2. 3. 4. 5. 6.
Define undercutting in cam. (AU April/May 2005) How can you prevent undercutting in cam? What is bevel gearing? Mention its type. What is meant by Arc of approach, arc of recess and arc of contact? State law of gearing. (AU Oct/Nov 2002) Differentiate involute tooth profile and cycloidal tooth profile. (AU April/May 2005)
Part B 1.
1. Derive the Law of gearing. (AU May/June 2006)
TEST 02: Part A 1. 2. 3. 4. 5. 6. Part B
What are the types of gear trains? Write about reverted gear train with suitable sketch. (AU April/May 2003) Define simple gear train. What is meant by compound gear train What is the advantage of compound gear train over a simple gear train? What is reverted gear train?
1. In an epicyclic gear train, the internal wheels A and B and compound wheels C and D rotate independently about axis O. The wheels E and F rotate on pins fixed to the arm G. E gears with A and C and F gears with B and D. All the wheels have the same module and the number of teeth are : TC= 28; TD= 26; TE= TF= 18. 1. Sketch
the arrangement ; 2. Find the number of teeth on A and B ; 3. If the arm G makes 100 r.p.m. clockwise and A is fixed, find the speed of B ; and 4. If the arm G makes 100 r.p.m. clockwise and wheel A makes 10 r.p.m. counter clockwise ; find the speed of wheel B
