UNIT3 internal grinding - micro finishing methods

Knowledge) What is internal grinding?

• Grinding the inner surface of a bore or hole
• Grinding the outer surface of a cylindrical workpiece
• Grinding the top surface of a workpiece
• Grinding the bottom surface of a workpiece

(Comprehension) What is the advantage of micro finishing methods?

• Improved surface quality and reduced roughness
• Faster machining time and higher material removal rate
• Greater flexibility in tool selection and setup
• Lower tooling costs and reduced machine wear

(Analysis) Why is it necessary to use a high-speed spindle in internal grinding?

• To improve surface finish and reduce chatter
• To increase material removal rate and reduce grinding time
• To reduce tool wear and improve tool life
• To maintain workpiece position and prevent deflection

(Knowledge) What is the purpose of using honing in internal grinding?

• To improve surface finish and size accuracy
• To remove material quickly and efficiently
• To shape the workpiece to the desired geometry
• To prevent workpiece deflection and chatter

(Comprehension) What is the difference between internal grinding and external grinding?

• Internal grinding grinds the inner surface of a bore, while external grinding grinds the outer surface of a workpiece
• Internal grinding grinds the outer surface of a cylindrical workpiece, while external grinding grinds the inner surface of a bore
• Internal grinding is a dry process, while external grinding is a wet process
• Internal grinding uses a hard abrasive wheel, while external grinding uses a soft abrasive wheel

(Evaluation) How would you determine the appropriate abrasive grain size for a given internal grinding application?

• Analyze the workpiece material and its hardness, and consult with the grinding wheel manufacturer's specifications
• Use a trial-and-error approach, starting with a coarse abrasive grain size and gradually decreasing until the desired surface finish is achieved
• Choose the largest abrasive grain size that will fit in the grinding wheel, to maximize material removal rate
• Use a fine abrasive grain size to reduce heat buildup and prevent thermal damage to the workpiece