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Generation Of Involute Gear Tooth Profile
This board illustrates the process of cutting of involutes Gear Teeth, by use of rack type cutter It consists of 3 white acrylic discs A, B, C. having pitch circle diameter 450 mm, 300 mm & 200 mm respectively. A gear tooth profile with module 25mm can be traced out on a peace of paper placed between disc and cutter. An affect of Interference and Undercutting on correct profile of gear tooth can be studied from the profiles traced.
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Motorised Gyroscope Apparatus
The apparatus consists of a rotor mounted in bearings. This rotor is free to rotate about
(i) Its own axis i.e. axis of spin.
(ii) Axis of precession.
(iii) Axis of gyroscopic couple.
The rotor is connected to the variable speed motor. The weight of the motor is balanced by another weight, which is on either side of the rotor. By putting weights on the weight platform torque can be supplied to rotor, which is also called gyroscopic couple.
SPECIFICATIONS OF MOTORISED GYROSCOPE APPARATUS:
1.Rotor dia. 250mm free about 3 axis of rotation driven by variable speed motor. 2.Dimmerstat to control the motor speed. 3.Stopwatch to measure the angular speed about the axis of precession. 4.Weights – 0.2 kg, 0.5 kg and 1 kg. 5.A technical manual accompanies the unit.SERVICES REQUIRE FOR MOTORISED GYROSCOPE APPARATUS:
1.220v stabilized AC supply with earthing connection. 2.Bench area – 0.5 x 0.5m at working height. 3.Tachometer for speed measurement (can be supplied at extra cost).
Coriollis Component Of Acceleration
This set up is designed to study coriollis component of Acceleration of a slider crank Mechanism. The apparatus uses hydraulic analogy to represent the rotating slider. It consists of a rotating block with two arms in opposite direction. These tubes can be rotated at various speeds by using a swinging field motor, which also acts as a dynamometer to measure torque applied to rotating tubes. A Perspex window on top cover helps to visualize the process. Rotameter is used to measure water flow rate through tubes. Water is circulated by small monoblaock pump.
Specifications:
1.Main Tank with fiberglass lining. 2.Rotating Arms 9/6 mm dia, 300 mm long. 3.Motor – Swinging field, D.C., 0.5 HP. 4.Rotameter 5.Monoblock Pump 6.Control Panel comprising of – (i) Speed Control Unit. (ii) Speed Indicator. (iii) Necessary switches. 7.Rigid support frame.Range of Experiment:
Coriollis Component of Acceleration can be determined at various speeds of rotation and water flow rates.Service Required:
1.A.C. Single Phase .230 V. stabilized supply. 2.Floor Space -1.5 m X 1.5 m.
Tool Dynamometers
A machine-tool dynamometer is a multi-component dynamometer that is used to measure forces during the use of the machine tool. Empirical calculations of these forces can be cross-checked and verified experimentally using these machine tool dynamometers.
(1) Milling Tool Dynamometers
(2) Grinder Tool Dynamometers
(3) Lathe Tool Dynamometers
(4) Drilling Tool Dynamometers
Journal Bearing Apparatus
DESCRIPTION:
The apparatus consists of a plain steel shaft encased in a bearing and directly driven by a small electric motor. The bearing is freely supported on the shaft and sealed at motor end. The motor speed is precisely controlled by control unit and sealed at motor end. The motor speed is precisely controlled by control unit and can be run in both directions. The bearing contains twelve equi-spaced pressures tapping around circumference and four along the axis. All are connected by light flexible plastic tube to the manometer so that the pressure head of all sixteen point can be observed at a time. The bearing can be loaded by attaching weight to the arm supported beneath it.SPECIFICATIONS:
1. Journal : 50 mm. dia. (nominal) 2. Bearing : 55 mm. dia. 3. Weights : 4 adjustable weights 4. Motor : D.C. shunt Motor, 3,000 RPM. 5. Control panel : For speed control of Motor 6. Manometer panel : 16 tube Manometer 7. Oil recommended : SAE 10EXPERIMENTS:
1. Observation of the pressure profile at various conditions of load and speed. 2. Plotting the Cartesian and polar pressure curves. 3. Plotting the theoretical Summerfield curves.SERVICE REQUIRED:
1. Electric Connections : A.C Single Phase, 230v. supply with ear thing. 2. Stand Alone Space : 1.5m X 1.5m X 4m Height.
Milling Tool Dynamometers
This is a simple and essay to understand set up introduce by sharp techno systems to study the behavior of cutting forces during milling operation in three directions. With this unit students can evaluate cutting depth, speed and feed. The unit works on standard method of octagonal ring with strain gauges. It is in to part one mechanical rings sandwiched between two M.S. plate with strain gauges fixed on it. This set of octagonal rings transmits the relevant data to the force indicator during milling operation.
FEATURES
1.Rigid construction & Compact Unit. 2.Assessment of cutting forces by giving due consideration to various parameters like depth of cut, material, cut, material, speed and feed. 3.Eassy in handling & Digital force indicators to measure three forces simuleniously.SPECIFICATIONS-
1.Mechanical sencing unit with set of octagonal rings and strain gauges. 2.Three channel digital force indicator with balancing potentiometers and polycarbonate front plate. 3.Range of force measurement in coordinate direction – 0 to 500 kg. 4.Over all size of mechanical unit- 300 x 300 mm.SERVICE REQUIRED
1.Necessary Milling Machine with automatic feed arrangement and tooling 2.230 volts, single phase, 50 Hz stabilized power supply.
Whirling Of Shaft Apparatus
The unit consists of a main spindle driven by a variable speed motor. Three different governor assemblies can be mounted over the spindle. A with pointer measures the lift of the governor. Students can calculate characteristics of governor at and compare their performance viz. Sensitiveness, stability, governor effort etc.
SPECIFICATIONS OF WHIRLING OF SHAFT APPARATUS:
1.Governor assemblies – Hartnell, porter & propel governor assembly one each with rotating weights. 2.Variable speed FHP D.C. motor to drive the main spindle. 3.Sliding weights for porter & proell governor. 4.Scale & a pointer to measure governor lift. 5.Spring & Spring compression adjustment arrangement. 6.A technical manual accompanies the unit.SERVICES REQUIRE FOR WHIRLING OF SHAFT APPARATUS:
1.230V, 5A, AC supply connection. 2.Bench area of 0. 75 x 1m. at working height.
Interference Undercutting
The board shows the demonstration of this phenomenon of Interference and Undercutting. When we rotate the teeth in anticlockwise direction, as the teeth is undercut is gives us a smooth working. When we give a rotation in clockwise direction, we can observe that the rack tip will be resisted by the tooth flank thus giving interference.
Cam Analysis Apparatus
The apparatus is designed to study the cam profiles and performance of cam and follower system. The apparatus consists of a shaft supported by ball bearings upon which three different types of cams can be mounted.
The push rod for follower is supported vertically, which can adopt three different types of followers. Cams and followers can be changed easily. A variable speed motor rotates the cam. A dial gauge permits plotting of follower displacement with respect to cam position. By operating the system at different Speeds, jump speed can be found and also the effect of weight and spring force on jump speed can be studied. Jump can be visualized also with the help of stroboscope (it is not supplied With the product).
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