Interference Undercutting

The unit consists of a base upon which the bearing holders and driving motor are bearing can be fitted in a holders to end conditions for test shafts, viz. Both end fixed and one end free, one end fixed. A Variac provided control of driving motor. The unit demonstrates the phenomenon of whirling of shafts with single rotor. As the test is destructive, after the test cannot be used, hence the unit only demonstrates the principle. However, results obtained are closer to theory, as compared to those with bare shafts. Also, It can be demonstrated that, after passing whirling speed, shaft again starts running true.

SPECIFICATIONS OF MOTORISED GOVERNOR APPARATUS:

1.Test shaft – 4.75 mm, 6.35 mm and 7.9 mm – 2 each. 2.Bearing to provided end conditions, (a) Both ends fixed, (b) One end fixed and one end free. 3.Drive motor 1/8 HP, 1500 rpm with control arrangement. 4.The whole unit is mounted on a sturdy base. 5.Rotor for each shaft of suitable size. 6.A technical manual accompanies the unit.

SERVICES REQUIRE FOR MOTORISED GOVERNOR APPARATUS:

Floor space area of 2m. X 1m. at working height. 230V, 15 A, AC electric supply connection.

The VIBLAB is designed to help in conducting various experiments to illustrate and verify the principles and relations involved in the study of vibrations. This apparatus enables a comprehensive range of Vibration Experiments to be conducted on single basic framework. The frame is robustly constructed from channel section. The experiments are specially designed for quick and easy assembly on to the framework using a minimum amount of common engineering tools. To reduce changeover time on tube more advanced free and forced vibration experiments, large knurled knobs are used to clamp components on the frame and many components are common to several experiments. All of the referenced groups of experiments are available separately making it possible to procure them individually & if required to build up a complete set over a period of time.

Specifications:

1.Wide range of experiments. 2.Forced and Free Vibrations. 3.Damped and undamped vibrations. 4.Arrangements for variation of damping. 5.Sturdy storage cabinet. 6.Experiments easily assembled. 7.Covers experiments for undergraduate studies. 8.Scope for student projects.

Features:

[I] Pendulum Experiments: 1.Simple Pendulum. 2.Compound Pendulum. 3.Bi-filler Suspension. [II] Longitudinal Vibration Expiariment. 1.Spring Mass System. 2.Eciuivalent Spring Mass study of undarrped 3.System free vibration [III] Torsional Vibration Experiment. 1.Single Rotor Systern. 2.Two Rotor System. 3.Single Rotor with viscous darnping. [IV] Damped Vibration Experiment. 1.Verification of Dukerleys Rule. 2.Forced rotor with viscous damping along with frictional HP Motor Strip chart recorder & control unit. 3.A technical manual accompanies the equipment.

Services required:

1.230 V, A.C. stabilized supply along with earthing connection. 2.Bench area 0.5m x 0.5m x 0.5m height. 3.Tachometer to measure the jumping speed, (can be supplied extra)

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.

This is a strain gauge type two component lathe tool dynamometer designed to measure vertical and horizontal forces on the while orthogonal cutting process. The unit is in two parts one is mechanical sensing unit or tool holder, which can mounted on the top of the Ross slide after removing swivel base and compound slide of a lathe and digital force indicator. With this Dynamometer student can study the change in these forces by varying Speed, Cut and Feed.

FEATURES:

1.Rigid in construction 2.Sensitive transuding and amplifying system for accuracy in force measurement. 3.Compact Digital force indicator. 4.Use of cutting fluid during operation is possible.

SCOPE OF SUPPLY:

1.Mechanical sensing unit or Tool Holder with string gauges. With H.S.S. tool of ½ “ size. 2.Control panel housing digital force indicator to measure two forces simuletensiously, balancing potentiometers, connoting cable. 3.Necessary switches, fuses and polycarbonate front plate. Range o to 500 Kg. 4.Centre Height, P.C.D.of clamping bolt size, clamping Bolt size. Three component lathe tool dynometer is also available.