LATHE MACHINE: VIVA QUESTIONS AND ANSWERS

What is a Lathe Machine?

Ans: A Lathe Machine is a machine tool used for shaping metal or wood pieces by rotating the workpiece on its axis and using cutting tools to remove material to achieve the desired shape.

What are the parts of a Lathe Machine?

Ans: The major parts of a Lathe Machine are: bed, headstock, tailstock, carriage, cutting tool, and tool post.

What are the different types of Lathe Machines?

Ans: The different types of Lathe Machines are: Engine Lathe, Bench Lathe, Speed Lathe, Turret Lathe, and Automatic Lathe.

What is the use of a Lathe Machine?

Ans: Lathe Machines are used for a variety of purposes including shaping and cutting metal and wood pieces, drilling, boring, thread cutting, and knurling.

What is the headstock in a Lathe Machine?

Ans: The headstock in a Lathe Machine is the part of the machine that holds the spindle and motor, and provides the necessary power to rotate the workpiece.

What is the bed in a Lathe Machine?

Ans: The bed in a Lathe Machine is the base of the machine that supports the headstock, tailstock, and carriage.

What is the tailstock in a Lathe Machine?

Ans: The tailstock in a Lathe Machine is a movable component that supports the end of the workpiece opposite the headstock.

What is the carriage in a Lathe Machine?

Ans: The carriage in a Lathe Machine is the component that carries the cutting tool and moves along the bed to cut the workpiece.

What is the cutting tool in a Lathe Machine?

Ans: The cutting tool in a Lathe Machine is the tool that is used to remove material from the workpiece.

What is the tool post in a Lathe Machine?

Ans: The tool post in a Lathe Machine is the component that holds the cutting tool in place and allows it to be rotated and adjusted as needed.

What is the difference between a Lathe Machine and a Milling Machine?

Ans: A Lathe Machine is used for shaping and cutting cylindrical objects, while a Milling Machine is used for cutting flat and irregular shapes. The Lathe Machine works by rotating the workpiece, while a Milling Machine works by moving the cutting tool in different directions.

What is the function of the Leadscrew in a Lathe Machine?

Ans: The Leadscrew in a Lathe Machine is used to move the carriage along the bed, either for cutting or to change the position of the cutting tool.

What is the purpose of the Chuck in a Lathe Machine?

Ans: The Chuck in a Lathe Machine is used to hold the workpiece in place while it is being shaped or cut.

What is the function of the Toolpost in a Lathe Machine?

Ans: The Toolpost in a Lathe Machine is used to hold and support the cutting tool, and to allow it to be adjusted and rotated as needed for the cutting operation.

How is the speed of the Lathe Machine controlled?

Ans: The speed of the Lathe Machine is controlled by adjusting the speed of the motor, which is typically done using a belt and pulley system.

What is the importance of selecting the right cutting tool for a Lathe Machine?

Ans: The right cutting tool is important because it affects the accuracy and quality of the final product, as well as the efficiency and safety of the cutting operation.

What are the safety precautions that should be taken while using a Lathe Machine?

Ans: Some safety precautions that should be taken while using a Lathe Machine include wearing protective clothing, wearing eye protection, keeping loose clothing and long hair tied back, and following the manufacturer's guidelines for safe operation.

What is the purpose of the faceplate in a Lathe Machine?

Ans: The faceplate in a Lathe Machine is used to hold the workpiece in place for operations that require the workpiece to be rotated around a fixed axis.

What is the function of the steady rest in a Lathe Machine?

Ans: The steady rest in a Lathe Machine is used to support the workpiece and prevent it from vibrating or moving during the cutting operation.

What is the significance of center height in a Lathe Machine?

Ans: The center height in a Lathe Machine is the distance from the bed to the center of the spindle and is an important measurement for determining the maximum size of the workpiece that can be accommodated by the machine.

How does the cutting speed affect the quality of the final product in a Lathe Machine?

Ans: The cutting speed affects the quality of the final product because it determines the amount of material that is removed from the workpiece during each revolution. If the speed is too high, the cutting tool may become overheated and lose its sharpness, while if the speed is too low, the cutting process may take too long and cause the tool to wear out.

How does the feed rate affect the cutting operation in a Lathe Machine?

Ans: The feed rate in a Lathe Machine determines the speed at which the cutting tool moves along the workpiece, and affects the amount of material that is removed during each pass of the tool. If the feed rate is too high, the cutting tool may become overheated or break, while if the feed rate is too low, the cutting process may take too long.

What is the importance of proper lubrication in a Lathe Machine?

Ans: Proper lubrication is important in a Lathe Machine because it helps to reduce friction, heat, and wear on the moving parts, extending the life of the machine and improving the quality of the final product.

What is the purpose of the tailstock in a Lathe Machine?

Ans: The tailstock in a Lathe Machine is used to support the end of the workpiece that extends beyond the headstock, providing additional stability during the cutting operation.

What is the function of the tool holder in a Lathe Machine?

Ans: The tool holder in a Lathe Machine is used to securely hold the cutting tool in place on the tool post, allowing it to be easily and quickly changed as needed.

What is the importance of having a bed with a rigid construction in a Lathe Machine?

Ans: A bed with a rigid construction is important in a Lathe Machine because it provides a stable and level platform for the cutting operation, reducing vibration and ensuring the accuracy of the final product.

How does the cutting direction affect the cutting operation in a Lathe Machine?

Ans: The cutting direction in a Lathe Machine affects the cutting operation because it determines the direction in which the cutting forces are applied to the workpiece. In general, cutting in the direction of the grain of the material will produce a smoother, more accurate cut than cutting against the grain.

What is the importance of having a balanced cutting tool in a Lathe Machine?

Ans: A balanced cutting tool is important in a Lathe Machine because it helps to reduce vibration and improve the stability of the cutting operation, leading to a smoother and more accurate cut.

How does the coolant system work in a Lathe Machine?

Ans: The coolant system in a Lathe Machine is used to cool the cutting tool and workpiece during the cutting operation, reducing heat and friction and extending the life of the tool. The coolant is typically delivered to the cutting area through a nozzle or spout, and is either a liquid, such as oil or water, or a mist or spray.

What is the purpose of the leadscrew in a Lathe Machine?

Ans: The leadscrew in a Lathe Machine is used to drive the carriage and cutting tool along the length of the workpiece, allowing the operator to control the cutting speed and depth.

What is the function of the apron in a Lathe Machine?

Ans: The apron in a Lathe Machine is used to control the movement of the carriage and cutting tool, allowing the operator to adjust the feed rate and cutting speed. The apron is typically attached to the carriage and is equipped with gears and hand cranks that are used to control the movement of the carriage.

What is the significance of the chuck in a Lathe Machine?

Ans: The chuck in a Lathe Machine is used to hold the workpiece in place on the spindle, allowing it to rotate for cutting operations. The chuck can be opened and closed to secure the workpiece in place, and is typically made from high-strength materials to withstand the forces generated during the cutting operation.

How does the tool post in a Lathe Machine support the cutting tool?

Ans: The tool post in a Lathe Machine supports the cutting tool by securely holding it in place on the carriage. The tool post can be adjusted to allow the cutting tool to be positioned at various angles and heights, allowing for a range of cutting operations to be performed.

What is the significance of the bed ways in a Lathe Machine?

Ans: The bed ways in a Lathe Machine are the surfaces on which the carriage and tailstock move, and are critical to the accuracy and stability of the cutting operation. The bed ways should be smooth and level, and should be lubricated to reduce friction and wear.

What is the importance of having a reliable and efficient drive system in a Lathe Machine?

Ans: A reliable and efficient drive system is important in a Lathe Machine because it powers the movement of the cutting tool and workpiece, and affects the speed and accuracy of the cutting operation. A well-designed drive system will provide consistent power and speed control, reducing the risk of tool breakage and improving the quality of the final product.