Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Me 37 > Chapter 25 > Flashcards

Chapter 25 Flashcards

1
Q

Twist drill

A

Most drilling done with this. Had two cutting edges or lips. Common drill geometry. Cutting action happens inside the workpiece.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

For actions that take place at point of drill:

A

1 a small hole is formed by the web, chips are not cut here. 2 chips are formed by the rotating lips. 3 chips are removed from the hole by the screw action fo the helical flutes. 4 the drill is guided by lands or margins that run against the walls of the hole.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Drilling

A

Process creates two chips.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

V Speed

A

In surface feed per minute. This is the cutting speed at the outer corner of the cutting lip.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Twist drills have what parts

A

The body, the point, and the shank.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Body of twist drill

A

Contains two or more spiral or helical grooves called flutes, separated by lands.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Lands on drill

A

To reduce friction, each land is reduced in diameter, leaving a narrow margin of full diameter and a cutting edge.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Flutes of drill

A

Serve as channels through which the chips are withdrawn from the hole and coolant gets to the cutting edges.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Helix angle

A

The principal take angles behind the cutting edges are formed by relation of flute helix angle to the work.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Take angle of drill

A

Varies along the cutting edges. Being negative close to the point and equal to the helix angle out at the lip.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Dubbing

A

Can change the rake angle adjacent to the cutting edge by a special grinding procedure.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Cone shaped point

A

Contains the cutting edges and the various clearance angles. Come able affects the direction of flow of the chips across the tool face.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Drill produces what

A

A thrust force, T, and a torque, M. drill torque increases with feed and drill diameter, while the thirst force is influenced greatly by the web design.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Web

A

Web is between the flutes and forms a metal column or backbone.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Straight line chiseled end

A

If a conical point is ground on the drill, the intersection of the web and the cone produces this.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Chisel point

A

Form a high negative rake angle, resulting in high thrust forces and excessive heat. Drill failure occurs both at the center and the outer tips rconsequently.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Straight line chiseled point does what

A

Had the tendency to walk along the surface, moving the drill away. This will require additional supporting operations like center drilling, burr removal, and tool change, which increase time and reduces productivity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Straight shank drills

A

Size uo to 3/8 diameter and must be held in drill chuck.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Taper shanks

A

Available on larger drills and common on drills above 1 in. Morse tapers used on these drills.held in a female taper in the end of the machine tool spindle. Taper assured that the drill is being accurately centered.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Tang

A

Is at the end of the taper shank and fits loosely into a slot ah the end of the tapered hole in the spindle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Drift

A

The drill maybe be loosened for removal by driving a metal wedge called a drift through a holder in the side of the spindle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

TiN coasting does what

A

Greatly increases drilling performance. Increase tools life by 200 to 1000 percent,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Depth of the hole drilled

A

The depth of the hole to be drilled. Dived by the diameter of the drill is the depth to diameter ratio.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Deep hold drills/hu drills

A

Are used when deep holes are to be drilled.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

When starting to drill a hole

A

It can reflect rathe readily because if the walking action of the chisel point.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Center drill

A

To ensure that a hole is started accurately use this.

27
Q

Special drill holders

A

Available that permit drills to be held with only a very short length protruding.

28
Q

Chuck

A

Straight shank drills must be held in a. Chuck. Chucks are adjustable and have steel fingers.

29
Q

Chucks with chuck keys

A

Required that the machine spindle be stopped in order to change a drill.

30
Q

Quick change chucks

A

Each drill is fastened in a round college that can be inserted into the chuck hole while it is turning by raising and lowering a ring on the chuck body.

31
Q

Keyless chucks

A

Have limited gripping strength

32
Q

Jigs

A

Work that is to be drilled is held in a vise or in jigs.

33
Q

Drill press

A

Consists of a base, a column that supports a power thread, a spindle, and a work table.

34
Q

Power bead

A

Obtains mot for diving the spindle

35
Q

Spindle

A

The spindle is fed by hand using a capstan wheel. Contains. Hole with a Morse taper in its lower end for which taper shank drills or dill chucks can be inserted.

36
Q

Drilling machines classified as

A

Bench, upright with single spindle, turret or NC turret, gang, multi spindle, deep hole, and trasnfer

37
Q

Sensitive drilling machines

A

Smaller, plain, bench type machines with more accurate spindles.used for tool and die work and filling small holes.

38
Q

Gang drilling machines

A

Often used when several opérateurs must be done on a single part. This consists of several independent columns and share a single table, the part can be slide into position for the other operation.

39
Q

Turret type upright drilling machines

A

Used in marge work pieces that cannot be easily handled manually.spindle can be quickly positioned.

40
Q

Plain radial drilling machines

A

Provide only a vertical spindle motion

41
Q

Semi universal machines

A

The spindle head can be pivoted at an angle to a vertical plane

42
Q

Universal machines

A

The radial arm is rotated about a horizontal axis to permit drilling at any angle.

43
Q

Radial drilling machines

A

Designated by the radius of the largest disk in which a center hole can be drilled

44
Q

Multiple spindle drilling machines

A

Mass production machines with many spindles.

45
Q

Cutting fluids

A

Fluid should be applied copiously.

46
Q

Counterboring

A

Provides an enlarged cylindrical hole with a flat bottom so that a bolt head will have a smooth bearing surface. Two or more diameters can be produced in a single counter boring operation.

47
Q

Countersinking

A

Makes a beveled section at the end of a filler hole to provide a proper seat for a flat head screw or Rivet.

48
Q

Spot facing

A

Done to provide a smooth bearing area on an otherwise fought surface at the opening of a hole and normal to its axis.

49
Q

Reaming

A

Removed a small amount of material from the surface of holes.

50
Q

Purposes of reaming

A

To bring holes to an size and to improve the finish of the existing hole. Multi edge cutting tools used.

51
Q

Hand reamerd

A

Inteneded to be turned by hand and to remove only a few thousandths of an inch of metal.

52
Q

Machine or cutting reamerd

A

Used for various machine tools at slow speeds.

53
Q

Rose chucking reamerd

A

Found cylindrical and have no relief behind the outer edges of the teeth

54
Q

Flutes chucking reamerd

A

Have relief behind teeth edges. Can cut on all portions of teeth. Their flutes are intended for light finishing cuts.

55
Q

Shell reamerd

A

Used for larger sizes in order to save cutting tool material. Only the shell is subjected to wear and need to be replaced.

56
Q

Expansion reamerd

A

Can be adjusted over a few thousandths of an inch to compensate for west to permit variation in bold size. Available in hand and machine types.

57
Q

Adjustable reamerd

A

Have cutting edges in the form of blades that are locked in the body. Blades can be adjusted over a greater range. The blades cna be replaced

58
Q

Taper reamerd

A

Are used for finishing holes to an exact taper.

59
Q

Roughing reamer

A

Had nicks along the cutting edges to break up the heavy chips that result ad a cylindrical hole is cute to a taper

60
Q

Finishing reamer

A

Had smooth cutting edges

61
Q

Solid type reamerd recommended for

A

Material that is hard, or if you need to a fairly large hole.

62
Q

Reamer speed

A

Two thirds that of drilling, for close tolerance, speeds should be lower

63
Q

Reamers p.2

A

Fluids should be used as drills are, and they must be held securely.

Me 37 (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions