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6th Six Months > TPC 323 > Flashcards

TPC 323 Flashcards

1
Q

In what turning process does the reduced finished diameter always stay the same along the total length of the workpiece?

A

Straight turning

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2
Q

What is the purpose of a relief cut?

A

To ensure the grinding tool can advance right up to the square face of the larger diameter

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3
Q

What method is more accurate than the set over method?

A

The compound rest method, it is most often used for tapers larger than three inches/foot

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4
Q

How would you hold a shorter workpiece in a Lathe?

A

Generally hold shorter workpieces in a chuck, in a collet, or mounted on a mandrel for facing

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5
Q

When facing the ends of work mounted between centers what do you use?

A

Use a half-center mounted in the tailstock when facing the ends of work, this allows the cutting tool to be fed right up to the center hole in the work

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6
Q

Why do you always use the same setup used for primary boring operations in counterboring operations?

A

This ensures concentricity of the bored and counterbored holes

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7
Q

If the size and shape of a workpiece preclude mounting in a lathe, boring must be done on a?

A

Horizontal boring mill

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8
Q

When boring a short, steep taper in a workpiece what method is used?

A

Compound rest method for boring tapers

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9
Q

What is the most accurate method for boring tapered holes?

A

Using the taper attachment on a lathe

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10
Q

What controls the shape of the threads to be cut?

A

The profile of the cutting tool

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11
Q

What is the most common way to setup a drill in a lathe?

A

It is to mount the drill in the tailstock quill

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12
Q

If you are required to drill a long hole or if the workpiece is bulky and cumbersome you should mount the drill in the?

A

Lathe headstock

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13
Q

What is a more accurate method of drilling in a lathe?

A

Drilling with the drill held stationary

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14
Q

When is the “sensitive” drill pressed used?

A

When drilling holes where a great deal of accuracy is not required

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15
Q

If a job requires you to drill holes in a work piece that is too large for an upright drill press, you should use a?

A

Radial drill press

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16
Q

Spot facing is very similar to counterboring, the major difference being?

A

The amount of metal being removed, in spot facing only a small amount of metal is removed

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17
Q

To bore in a drill press you do what?

A

Install a boring bar in a boring head

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18
Q

What tool provides a way to get repeated accuracy in hole location and alignment?

A

Drill jigs

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19
Q

Can reaming be done by hand or on a drill press or lathe?

A

Yes

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20
Q

What happens during the honing process?

A

Fine abrasive stones contact the work surface and remove very small amounts of metal

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21
Q

In what process do you machine a groove in the workpieces top surface?

A

Side milling

22
Q

What cutters are used in profile milling?

A

Specialized cutters are available for milling various profiles on a workpiece, cutters are made to produce concave and convex profiles

23
Q

Face milling cutters that are less than 6 inches in diameter are often called?

A

Shell end mills

24
Q

What cutters are used for slots?

A

Special milling cutters are available for machining keyways for all standard Woodruff keys

25
Q

Shaping is less costly than milling, the ____________ cutting tool is easily made. It can often get into places where tools of other shapes cannot go.

A

Single-pointed

26
Q

What is a slotter?

A

A vertical shaper

27
Q

The cutting action of broaching is done by?

A

Pushing or pulls along

28
Q

The cutting teeth on a broach increase in height from?

A

The end of the tool first entering the work to the end entering the work last

29
Q

The very fine finishes needed for these applications can usually be obtained only by ___________ after finish machining it.

A

Grinding the surface, grinding can produce tolerances as close as plus or minus .000020 in. Grinding is also used to remove metal from a workpiece that is too hard for normal machining cutters and methods

30
Q

When using vertical type surface grinders you can…

A

Grind a larger area in a given period of time. Use vertical grinding machines when you must machine pieces in a short period of time

31
Q

When the workpieces dimensions must be close tolerances what is affected?

A

The choice of machine, the function of the workpiece, and it will help improve your skills

32
Q

How can you measure angular dimensions in a circle?

A

The basic unit of measurement is degree. Minutes are 1/60th of a degree
Seconds are 1/60th of a minute

33
Q

Why must you be careful with angular tolerances?

A

They can result in great variations if they become too large. This is because the spread gets larger as the distance from the center increases

34
Q

At times you will be required to work with multiple dimensions which are related to each other. In this case you will find what is called?

A

Tolerance stack up

35
Q

Another method of specifying tolerances is the unilateral system. In this system the tolerance is applied in only?

A

One direction from the nominal size ( either plus or minus )

36
Q

Stock is usually selected that has some amount of extra material. This extra material can be?

A

Removed to finish the part to the required dimensions and surface finish

37
Q

Why must enough material be left over after making a rough cut?

A

If not done the finishing cut will cause the workpiece to be undersized

38
Q

What’s the first step when starting a finishing cut?

A

A small portion of the piece will be machined and checked for size

39
Q

The type of surface finish made by a machine tool is influenced primarily by three things?

A
  • Vibration between the workpiece and the tool
  • feed marks left by the shape of the cutting tool
  • the way chips are formed by the tool
40
Q

What is a surface averaging instrument?

A

A surface averaging instrument electronically measures average roughness hieght

41
Q

What is machinability?

A

A term that describes the ease or difficulty with which you can remove metal from a workpiece

42
Q

Brittle metals like cast iron form discontinuous chips, discontinuous chips indicate?

A

A fairly good surface finish when working with brittle metals

43
Q

The main considerations in cutting fluids use are?

A

Use the correct type of fluid
Use the proper amount of fluid
Correct point of fluid application

44
Q

Solid lubricants are mainly used to?

A

Grease the sides and backs of power hacksaw and bandsaw blades

45
Q

What is operational sequence?

A

The best possible order that machining can be done in for the most efficient use of time

46
Q

Where does machining efficiency originate from?

A

With careful study and analysis of the total job

47
Q

Should you try and keep the workpiece in the same machine for as many operations as possible?

A

Yes

48
Q

Justifying points for obtaining specialized equipment are?

A

The repetitive need of a part
The need for making a part on obsolete equipment
Emergency requirements
Unavailable standard fixtures or tooling to do a given job

49
Q

Should you try and use a machine that is slightly oversized for a job?

A

Yes

50
Q

Always make sure the machine you use has enough power to?

A

Perform the job effectively

6th Six Months (8 decks)

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