lecture 2

Question 1

What is the primary purpose of turning in machining?

Answer 1

To produce parts cylindrical in shape by a single point cutting tool on lathes.

Question 2

What type of lathe is primarily used for turning?

Answer 2

Center Lathe

Question 3

What is facing in lathe operations?

Answer 3

Creating a smooth, flat face perpendicular to the axis of a cylindrical part.

Question 4

What does straight turning accomplish?

Answer 4

Reduces the diameter of a part to a desired dimension.

Question 5

What is parting (cutoff) in lathe operations?

Answer 5

The separation of a part from a larger piece of stock by means of a parting tool.

Question 6

What is the purpose of grooving in lathe operations?

Answer 6

To produce recesses and shoulders.

Question 7

What does chamfering do?

Answer 7

Removes sharp edges.

Question 8

How is threading accomplished on a lathe?

Answer 8

By advancing the cutting tool at a feed equal to the thread pitch.

Question 9

What is contour turning?

Answer 9

Using a single-point cutting tool to reproduce a surface contour from a template.

Question 10

What is knurling in machining?

Answer 10

A metal forming operation used to produce a regular cross-hatched pattern in the work surface.

Question 11

What is taper in the context of lathe operations?

Answer 11

A uniform increase or decrease in the size or diameter of a work piece.

Question 12

What is the process of centering in lathe operations?

Answer 12

Aligning the workpiece for accurate machining.

Question 13

What is drilling in lathe operations?

Answer 13

Feeding the drill into the rotating work along its axis.

Question 14

What is boring or internal turning?

Answer 14

Enlarging a hole in a workpiece.

Question 15

What is internal threading?

Answer 15

Creating threads inside a workpiece using tapping tools mounted in the tailstock.

Question 16

What does a right-hand tool do?

Answer 16

Cuts from right to left.

Question 17

What are the materials commonly used for lathe tools?

Answer 17

• H.S.S
• Cemented carbide

Question 18

What is the shank of a single point cutting tool?

Answer 18

Main body of the tool, gripped in the tool holder.

Question 19

What is the face of a single point cutting tool?

Answer 19

Top surface of the tool between the shank and the point.

Question 20

What is the flank of a single point cutting tool?

Answer 20

Portion of the tool that faces the work.

Question 21

What is the point of a single point cutting tool?

Answer 21

Wedge shaped portion where the face and flank of the tool meet.

Question 22

What is the base of a single point cutting tool?

Answer 22

Bearing surface of the tool on which it is held in a tool holder.

Question 23

What is the purpose of the nose radius on a cutting tool?

Answer 23

To enable greater strength, increase tool life, and surface life.

Question 24

What is a chuck used for in workpiece holding techniques?

Answer 24

Used for circular shapes.

Question 25

What is a face plate used for?

Answer 25

Clamping irregularly shaped workpieces.

Question 26

What is a collet?

Answer 26

A device that tightens around a workpiece, generally with a maximum diameter of 25 mm.

Question 27

What is a mandrel in machining?

Answer 27

A tool used for holding workpieces, especially those that are tubular.

Question 28

What are centers used for in workpiece holding?

Answer 28

Aligning and supporting the workpiece during turning.

Question 29

What is a steady rest in lathe operations?

Answer 29

A device used to support long workpieces during turning.

Question 30

What is a follower rest in lathe operations?

Answer 30

A device that follows the workpiece and provides support during machining.