WealthChaser Global Research Interview Questions and Answers

The bearings used in grinding wheel spindle for centerless grinding machine are usually angular contact ball bearings. The radial play allowed is typically 0.002-0.003 mm and the axial play is around 0.005-0.008 mm.

• Angular contact ball bearings are commonly used in grinding wheel spindles for centerless grinding machines.

• Radial play allowed is usually between 0.002-0.003 mm.

• Axial play allowed is typically around 0.005-0.008 mm.

Backlash in screw rod is checked by measuring the distance between the nut and the screw when the screw is rotated in both directions. Typically, a small amount of backlash is allowed.

• Measure the distance between the nut and the screw when the screw is rotated clockwise and counterclockwise

• Calculate the difference in these measurements to determine the amount of backlash

• Typically, a small amount of backlash is allowed depending on the application

Some common problems faced in centreless grinding machines include vibration, workpiece not round, and wheel not dressed properly.

• Vibration during operation leading to poor surface finish

• Workpiece not being perfectly round due to improper setup or worn out parts

• Wheel not dressed properly causing uneven grinding or burning of workpiece

After new machine erection and commissioning, I conduct thorough testing, ensure proper functioning, train operators, and create maintenance schedules.

• Conduct thorough testing to ensure all components are functioning properly

• Train operators on how to use the machine safely and efficiently

• Create maintenance schedules to ensure the machine remains in optimal condition

• Address any issues or malfunctions that arise during initial operation

• Coordinate with production team to ensure ...read more

TIG welding uses a non-consumable tungsten electrode to create the weld, while MIG welding uses a consumable wire electrode.

• TIG welding stands for Tungsten Inert Gas welding, while MIG welding stands for Metal Inert Gas welding.

• TIG welding requires more skill and precision compared to MIG welding.

• TIG welding produces higher quality and cleaner welds, making it suitable for thin materials and critical applications.

• MIG welding is faster and more versatile, making it ideal for t...read more

In preventive maintenance schedule, I check equipment condition, lubrication, alignment, calibration, and cleanliness.

• Check equipment condition for signs of wear or damage

• Ensure proper lubrication of moving parts

• Check alignment of components for optimal performance

• Calibrate instruments and controls as needed

• Maintain cleanliness of equipment and surrounding area

• Examples: inspecting belts for wear, greasing bearings, aligning motor shafts, calibrating temperature sensors, clean...read more

Common problems faced in screw rods include wear and tear, corrosion, misalignment, and jamming.

• Wear and tear due to continuous use can lead to decreased efficiency and eventual failure.

• Corrosion can weaken the screw rod and cause it to break or malfunction.

• Misalignment of the screw rod can result in uneven wear and increased friction.

• Jammed screw rods can be caused by foreign objects or debris getting stuck in the mechanism.

• Lubrication issues can also lead to problems with s...read more