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What is the purpose of grinding in the metal cutting operation?
What is the purpose of grinding in the metal cutting operation?
- To remove a large volume of metal
- To increase the material removed from the work
- To obtain very high dimensional accuracy (correct)
- To create a rough surface finish
Which type of grinding machine is used to remove excess metal from cast parts and welded joints?
Which type of grinding machine is used to remove excess metal from cast parts and welded joints?
- Hand grinding machine (correct)
- Cylindrical grinding machine
- Internal grinding machine
- Surface grinding machine
What is the accuracy level of the grinding process mentioned in the text?
What is the accuracy level of the grinding process mentioned in the text?
- $0.000025mm$ (correct)
- $0.00025mm$
- $0.0000025mm$
- $0.0025mm$
Which type of grinding machine is used to finish parts to very accurate dimensions?
Which type of grinding machine is used to finish parts to very accurate dimensions?
Which type of grinding machine is used for removing stock with no reference to the accuracy of results?
Which type of grinding machine is used for removing stock with no reference to the accuracy of results?
What is the main cutting tool used during the grinding operation?
What is the main cutting tool used during the grinding operation?
Which natural abrasive has a greater hardness and abrasive action than sandstone?
Which natural abrasive has a greater hardness and abrasive action than sandstone?
What is the manufacturing process for silicon carbide abrasives?
What is the manufacturing process for silicon carbide abrasives?
What is the trade name for silicon carbide abrasives?
What is the trade name for silicon carbide abrasives?
Which natural abrasive is used in making grinding wheels for cemented carbide tools?
Which natural abrasive is used in making grinding wheels for cemented carbide tools?
Which abrasive material has a higher toughness compared to silicon carbide?
Which abrasive material has a higher toughness compared to silicon carbide?
What does the grade of a grinding wheel refer to?
What does the grade of a grinding wheel refer to?
What term refers to the relative spacing occupied by the abrasives and bond in a grinding wheel?
What term refers to the relative spacing occupied by the abrasives and bond in a grinding wheel?
What is the first element in the Indian standard marking system for grinding wheels?
What is the first element in the Indian standard marking system for grinding wheels?
What is the main purpose of cylindrical grinders?
What is the main purpose of cylindrical grinders?
Which type of surface grinder leaves a criss-cross pattern of grinding scratches on the work surface?
Which type of surface grinder leaves a criss-cross pattern of grinding scratches on the work surface?
What is the main operation involved in removing excess material from metal parts using a grinding wheel?
What is the main operation involved in removing excess material from metal parts using a grinding wheel?
Which type of grinding machine is used specifically for accurately grinding gears?
Which type of grinding machine is used specifically for accurately grinding gears?
What is the main characteristic of a grinding wheel?
What is the main characteristic of a grinding wheel?
Which category do grinding wheels fall into based on their construction?
Which category do grinding wheels fall into based on their construction?
What is the purpose of a diamond tool dresser in taper grinding?
What is the purpose of a diamond tool dresser in taper grinding?
Which abrasive is obtained from the Earth's crust and is used to grind softer materials only?
Which abrasive is obtained from the Earth's crust and is used to grind softer materials only?
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Study Notes
Grinding Operation
- The purpose of grinding in metal cutting is to remove excess material from metal parts.
Types of Grinding Machines
- The type of grinding machine used to remove excess metal from cast parts and welded joints is a rough grinding machine.
- The type of grinding machine used to finish parts to very accurate dimensions is a precision grinding machine.
- The type of grinding machine used for removing stock with no reference to the accuracy of results is a rough grinding machine.
Accuracy of Grinding Process
- The accuracy level of the grinding process is high, with a precision of up to 0.001 mm.
Cutting Tool
- The main cutting tool used during the grinding operation is an abrasive wheel.
Abrasives
- Corundum is a natural abrasive that has a greater hardness and abrasive action than sandstone.
- Silicon carbide abrasives are manufactured through a process of reacting silica and carbon in an electric furnace.
- The trade name for silicon carbide abrasives is Carborundum.
- Diamond is used in making grinding wheels for cemented carbide tools.
- Diamond has a higher toughness compared to silicon carbide.
Grinding Wheel Characteristics
- The grade of a grinding wheel refers to its hardness.
- The structure of a grinding wheel refers to the relative spacing occupied by the abrasives and bond.
- The Indian standard marking system for grinding wheels starts with the letter "A".
Cylindrical Grinders
- The main purpose of cylindrical grinders is to grind cylindrical surfaces.
Surface Grinders
- The type of surface grinder that leaves a criss-cross pattern of grinding scratches on the work surface is a reciprocating surface grinder.
Gear Grinding
- The type of grinding machine used specifically for accurately grinding gears is a gear grinder.
Grinding Wheel Construction
- Grinding wheels fall into the category of bonded abrasives.
- The main characteristic of a grinding wheel is its ability to cut and polish metal surfaces.
Diamond Tool Dresser
- The purpose of a diamond tool dresser in taper grinding is to restore the grinding wheel's cutting ability.
- Emery is an abrasive that is obtained from the Earth's crust and is used to grind softer materials only.
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