Chapter 23

Question 1

Turning

Answer 1

The process of machining external cylindrical and conical surfaces.

Question 2

Taper turning

Answer 2

Tool is fed at an angle to the axis of rotation

Question 3

Facing

Answer 3

Tool is fed to the axis of rotation

Question 4

Form turning

Answer 4

Using a tool with a specific form that leaves the same shape on the workpieces.

Question 5

Parting or cutoff

Answer 5

The workpiece is cut into two

Question 6

Boring

Answer 6

Produces internal cylindrical or conical surfaces

Question 7

For turning

Answer 7

Do an initial cut, then a rough cut

Question 8

Speed v is

Answer 8

Feet per minute

Question 9

Feed rate

Answer 9

fr is inches per revolution

Question 10

Depth of cut

Answer 10

d is in inches

Question 11

Boring

Answer 11

The enlarging of an existing hole. Since the tool overhang will be greater, smaller deeds and depths of cuts may be selected to reduce vibration and chatter.

Question 12

Facing

Answer 12

Facing is the producing of a flat surface as the result of the tool being fed across the end of the rotation workpiece. Should be fed at a proper uniform rate.

Question 13

Parting

Answer 13

The operation by which one section of the workpiece is separate from the remainder, cut off. Tool is fed perpendicular.

Question 14

Drilling

Answer 14

When drilling deep holes, remove the drill to allow chips to exit, this is peck drilling.

Question 15

Bed of lathe

Answer 15

Base and backbone of lathe. All basic components are mounted here.

Question 16

Ways of lathe

Answer 16

Are on top of the bed.

Question 17

Headstock

Answer 17

Provides lowered means to rotate the work at various rpm values. It consists of a hollow spindle and a set of transmission gears.

Question 18

Spindle

Answer 18

Carries the headstock. Has a hole in which large bar stock can be fed through. Contains means for mounting types of work holding devices.

Question 19

Tail stock consists of

Answer 19

1 a lower casting fits in the inner ways of the bed and can slide longitudinally. 2 an upper casting fits on the lower one and can be moved transversely. 3 the quill, contains a Morse tapper.

Question 20

Quill

Answer 20

Cutting tools or a lathe center are held here

Question 21

Carriage assembly

Answer 21

Provides the means for mounting and moving the cutting tools

Question 22

The carriage

Answer 22

Rides on the outer set of the ways.

Question 23

Cross slide

Answer 23

Provides a means for moving the lathe tool in the facing direction.

Question 24

Compound test

Answer 24

Tool post mounted here.

Question 25

Apron

Answer 25

Had the controls for providing manual and powered motion for the carriage and powered motion for the cross slide.

Question 26

Feed rod

Answer 26

Provides powered movement of the carriage and cross slide

Question 27

Lead screw

Answer 27

Used for cutting threads. A split nut is closed around the lead screw

Question 28

Quick change gear boxes

Answer 28

Driven by the spindle, connect the feed rod and lead screens

Question 29

Turret lathes

Answer 29

Hexagon turret replaces tailstock. The turret holds six tools and can be rotated for the tool of need. The square turret on the cross slide can bring each of the four tools into operating position.

Question 30

Ram type turret lathe

Answer 30

Tam and turret are moved up to the cutting positions by means of the capstan wheel and power feed is engaged.

Question 31

Saddle type turret lathe

Answer 31

Main turret mounted on saddle. A pilot arm may be used for extra rigidity.

Question 32

Two types of single spindle screw machines

Answer 32

American Brown and sharpe, other is Swiss type.

Question 33

Brown and sharpe screw machines

Answer 33

Designed for bar stick with a main turret mounted. All motions of the turret controlled by cams. The turret cam defines the movement of the turret. These have a feature that locks up the workpiece after kt is cut, and carries it to a position for secondary work.

Question 34

Swiss type automatic screw machine

Answer 34

Most machining done with single point cutting tools. Not good for machining small parts

Question 35

Lathe cutting tools

Answer 35

Most lathe operations are done using single point cutting tools. Because took materials are expensive, it’s desirable to use as little as possible. Inserts may be used for higher cutting speeds.

Question 36

Lathe centers

Answer 36

Workpieces that are relatively long are usually held between centers. Two lathe centers used, ine in the spindle hole, and the other hole in the tailstock quill.

Question 37

Two types of lathe centers

Answer 37

Dead and alive. Dead centers are solid and they have a Norse taper on one end.

Question 38

Lathe dog and dog plate

Answer 38

Dog is clamped to the work. The tail of the dog enters a slot in the dog plate which is attached to the lathe spindle in the same manner as the lathe chuck.

Question 39

Lathe centers

Answer 39

Before a workpiece can be held between lathe centers a center hold must be drilled first.

Question 40

Lathe chucks

Answer 40

Support a wide variety of workpieces.

Question 41

Two types of chucks

Answer 41

Three jaw and four jaw

Question 42

Three jaw chucks

Answer 42

Used for work that had a round or hexagonal cross section. Will provide automatic centering.

Question 43

Four jaw chuck

Answer 43

Each jaw can be moved inward and outward independently through the use of chuck wrench. Support a variety of workpiece shapes, and can be used for heavy duty work.

Question 44

Collets

Answer 44

Used to hold smooth cold roller bar stock or machines workpieces more accurately than with regular chucks. For a variety of symmetrical shapes.

Question 45

Collets only used on

Answer 45

Drill rod cold rolled extended or previously machines stock.