Which of the following movements of the grinding wheel is possible in a chucking-type internal grinder?

Explanation:

In chucking-type internal grinders, the grinding wheel's movements are crucial for the precision and efficiency of the grinding process. The correct option, which is option 3, states that "Both rotational and reciprocating movement" are possible for the grinding wheel in a chucking-type internal grinder. Let's delve into this in detail to understand why this is the case and analyze the other options as well.

Chucking-Type Internal Grinder:

A chucking-type internal grinder is a type of internal grinder where the workpiece is held in a chuck, and the grinding wheel is used to grind the internal surfaces of the workpiece. The grinding wheel can perform multiple types of movements to achieve the desired precision and surface finish. The primary movements involved in a chucking-type internal grinder are rotational and reciprocating movements.

Rotational Movement:

The rotational movement of the grinding wheel is essential for the grinding process. This movement allows the abrasive particles on the grinding wheel to remove material from the internal surface of the workpiece. The rotational speed of the grinding wheel is a critical parameter that affects the surface finish, material removal rate, and overall efficiency of the grinding process. The grinding wheel rotates at high speeds, enabling it to grind the workpiece with precision.

Reciprocating Movement:

In addition to the rotational movement, the grinding wheel in a chucking-type internal grinder also performs a reciprocating movement. This movement involves the grinding wheel moving back and forth along the axis of the workpiece. The reciprocating motion ensures that the entire internal surface of the workpiece is ground uniformly. This movement is especially important for achieving a consistent surface finish and maintaining the dimensional accuracy of the workpiece.

Combined Movements:

The combination of rotational and reciprocating movements allows the grinding wheel to achieve a high level of precision in grinding the internal surfaces of the workpiece. The rotational movement ensures the material is removed efficiently, while the reciprocating movement ensures uniformity and consistency in the grinding process. This combination is what makes the chucking-type internal grinder effective for high-precision applications.