Cylindrical Grinding Lab Experiment

Aim

To grind the cylindrical surface of the given materials as per the given dimensions

Tools Required

1. Grinding Machine
2. Grinding Wheel
3. Work Piece
4. Steel rule.
5. Outside calipers.
6. Cutting tool.

Procedure

1. The given work piece is first fitted in the chuck of the lathe.
2. By fitting the tool in tool post the work piece will be reduced to given dimensions.
3. First reduce the diameter to 23mm size then reduced the diameter to 15mm and 18mm at the middle.
4. By facing the work piece to the tool work piece is reduced to 70mm.
5. After the preliminary lathe operation, the work piece is held in the ends of the cylindrical grinder.
6. The grinding wheel is turned on and it is moved towards the work piece such that the surfaces of the cylindrical position are grinded to +-0.2mm.

Result

Thus the required dimension of cylindrical surface is obtained.

Viva Questions

Define Grinding

Ans: A process of material removal in the form of small chips by means of rotating abrasive particles bonded together in a grinding wheel to produce flat, cylindrical or other surfaces is known as grinding.

Define Grinding Wheel

Ans: A wheel composed of hard and sharp edged abrasive grains held together by a bonding material and is used to finish within close tolerances on various surfaces by its abrasive action is known as grinding wheel.

Define Grinding Machine.

Ans: The machine tool designed for finishing within close tolerances to the flat, cylindrical or other surfaces by the abrasive action of a rotating wheel is called a grinding machine or simply grinder.

Name the elements which are considered in the construction of a grinding wheel.

Ans: Six important elements which are considered in the construction of a grinding wheel are as follows:

(a) Abrasive,(b) Grain Size,(c) Bond and bonding material,(d) Grade,(e) Structure,,(f) Wheel shape

Define abrasives used in grinding wheels.

Ans: Abrasives used for making grinding wheels may be classified as follows:1. Natural abrasives,2. Artificial abrasives.

Name some natural abrasives.

Ans: The commonly used natural abrasives are as follows:1. Sand stone or quartz 2. Emery3. Corundum 4. Garnet 5. Diamond

Name some artificial abrasives.

Ans:1. Silicon carbide 2. Aluminium Carbide

Define grain size in connection with grinding wheel.

Ans: The abrasives are produces by grind mills. The size of grains produced by this process is called grain size.

Name different types of grinding wheels.

1. Built-up wheels 2. Cone and plug shape wheels 3. Mounted wheels 4. Diamond wheels

Define dressing of grinding wheels.

Ans: Dressing may be defined as the operation of sharpening dull abrasive grains or exposing fresh sharp grains on the face by cutting a portion of the wheel.

Materials Supplied: Mild steel:

Tool Material: High Speed Steel (H.S.S)