Machining Operation

Question 1

Rotational work part shape and production

Answer 1

Cylindrical or disk like

Cutting tool removes material from a rotating oart

Question 2

Non rotational work part shape and production

Answer 2

Block like or plate like

Linear motion combined with rotating or liner at roll motions

Question 3

What two factors influence geometry produced by machine operations

Answer 3

Relative motion between tool and work part

Shape of cutting tool

Question 4

Generating

Answer 4

Geometry determined by feed trajectory of cutting look

Question 5

Forming

Answer 5

cutting tool is imparted to the work in order to create part geometry

Question 6

Thread cutting

Answer 6

Pointed shape of cutting tool determines the form of the threads, but the large feed rate generates the threads.

Question 7

Slotting

Answer 7

Width of cutter determined the width of slip, but feed motion creates the slot

Question 8

Turning

Answer 8

A machine process in which a single point tool removes material from the surface of a rotating workpiece.

Question 9

What is name of tool machine turning is carried out on

Answer 9

Lathe- provided power to turn the path and feed tool and specific rate and depth

Question 10

Facing (on lathe)

Answer 10

Tool is fed radially into the rotating work on one end to create a flat surface of the end

Question 11

Taler turning (on lathe)

Answer 11

Tool is fed at an angle, thus creating a tapered cylinder or conical shape

Question 12

Contour turning (on lathe)

Answer 12

Too, follows a contour that is other than straight, creating a contoured form in the turning oart

Question 13

Form turning (on lathe)

Answer 13

Too, has a shape that is imparted to the work by plunging the tool radially into work

Question 14

Chamfering (on lathe)

Answer 14

Cutting edge of tool is used to cut an angle on the corner

Question 15

Cutoff (in lathe)

Answer 15

Too is fed radially into work at some location along its length to cut end of the part

Question 16

Threading (on lathe)

Answer 16

Pointed tool is fed linearly across the outside surface of the rotating part in a direction parallel to axis of rotation

Question 17

Boring (on lathe)

Answer 17

A single pint tool is fed linearly, parallel to axis of rotation , on the inside diameter of an existing hole in the part

Question 18

Drilling (on lathe)

Answer 18

Drill into the rotating work along its axis

Question 19

Knudling (on lathe)

Answer 19

(Not a machining operation as it does not involve cutting material). It is a metal forming operation used to produce a regular crosshatch pattern on work surface

Question 20

Reaming (operation after drilling)

Answer 20

Used to slightly englarge hole to provide better tolerance on its diameter and improve surface finish. Too, has straight flutes

Question 21

Tapping (operation after drilling)

Answer 21

Performed by a tap and is used to prove internal screw threads

Question 22

Counterboring (after drilling operation)

Answer 22

Provides a stepped hole, where larger diameter follows a smaller diameter partially into the hole. Used to seat bolt heads into hole

Question 23

Countersinking (after drill operations)

Answer 23

Like counterboring but step in hole in cone shaped for flat head screws and bolts

Question 24

Centering (before drilling operation)

Answer 24

Operation drills a starting hole to establish location for subsequent drilling

Question 25

Spot facing (after drilling operation)

Answer 25

Makes flat machined surface on the work part in localised area

Question 26

Milling

Answer 26

Work part is fed past a rotating cylindrical roll with multiple cutting edges. Axis of rotation of tool is perpendicular to direction of feed (opposite to drilling).

Question 27

Name of tool used in milling

Answer 27

Milling cutter and edge are called teeth. Machine is called a milling machine

Question 28

What type of operation is milling

Answer 28

Interrupted cutting. Teeth enter and exit material during each revolution. Impact force and thermal shock in teeth so tool must withstand this.

Question 29

What are the two types of milling operations

Answer 29

Peripheral milling and face milling

Question 30

Face milling

Answer 30

Axis of cutter perpendicular to surface being milled and machining is performed by cutting edges on both the end and outside of the cutter.

Question 31

Type of milling when diameter of cutter is greater that the work part widge so there is overhang of cutter on both sides

Answer 31

Conventional face milling

Question 32

Type of milling when cutter overhangs on only one side

Answer 32

Partial face milling

Question 33

Type of milling where cutter diameter is less than that of flat part being cut

Answer 33

End milling

Question 34

Type of milling used to form shallow pockets into flat part

Answer 34

Pocket milling

Question 35

Type of milling where outside periphery of flat part is cut

Answer 35

End milling

Question 36

Type of milling where a ball nose cutter (rather than square) is fed back and forth to create a curvilinear path at close intervals to create three dimensional surface form

Answer 36

Surface contouring