Which of the following centre-less grinding can be preferred for headed, stepped, or taper-shaped workpieces?

Explanation:

Centre-Less Grinding:

• Centre-less grinding is a machining process that uses abrasive cutting to remove material from a workpiece. Unlike centered grinding, in centre-less grinding, the workpiece is not held between centers and instead supported by a work rest blade. This method is highly efficient for mass production and is used to achieve high precision and surface finish.

Working Principle: In centre-less grinding, the workpiece is held between two wheels: a grinding wheel and a regulating wheel. The grinding wheel performs the cutting action, while the regulating wheel controls the workpiece's rotational speed and feed rate. The workpiece is supported by a work rest blade, which is positioned between the two wheels.

Advantages:

• High production efficiency due to continuous grinding process.
• Capability to grind complex shapes and profiles.
• Minimal clamping and fixturing, reducing setup time.

Disadvantages:

• Requires precise setup to achieve desired tolerances.
• Not suitable for extremely large workpieces.

Applications: Centre-less grinding is commonly used for producing cylindrical parts, such as pins, bushings, and rollers. It is also used for grinding tapered, stepped, or headed workpieces in various industries, including automotive, aerospace, and manufacturing.

Plunge cut grinding:

• This is preferred for headed, stepped, or taper-shaped workpieces because it allows the grinding wheel to plunge directly into the workpiece. Plunge cut grinding is ideal for creating specific shapes and profiles on the workpiece without the need for axial movement. It is particularly effective for grinding parts with complex geometries, such as steps, tapers, and heads. The grinding wheel is fed radially into the workpiece, providing precise control over the material removal process and achieving the desired shape with high accuracy.