問題一覧
1
an example of a primary use for high carbon steel is
a file
2
high carbon steels lose their hardness above a machining speed of
50 fpm
3
when cooled to room temperature high speed steel retains Rockwell hardness value of
63 to 65
4
straight carbide, cutting tools should not be used to machine plain carbon steel because they
Crater and fail quickly
5
polycrystalline diamond cutting tools are not effective on cobalt or nickel because
They chemically react with the cutter and cause rapid wear
6
during ordinary, turning operations with a lathe tool, the edge that does most of the cutting is the
side cutting edge
7
Delay tool bit relief angle affected by a 14 1/2° tool holder angle is the
end
8
if you take too light a feed on a workpiece
work harden the work peice
9
The type of grinding wheel you should use for rough, grinding carbides is
80 grit silicon carbide
10
which is not a common nano oxide matrice
aluminosiliate
11
because of his strength, the best type of advance, ceramic cutting tool for mechanical, and where applications is
silicon nitride
12
The advance ceramic that retains its straight at temperatures as high as 1400°C is
Silicon carbide
13
The advanced ceramic that is extensively used in electrical applications is
aluminum oxide
14
The size of a lid is designated by the maximum diameter of the workplace swung over the way distance between centers and
Overall length of the bed
15
The item that permits used to remove the backlash between the compound rest, and the cross slide is the
Gib
16
you can use the carriage clamp screw only to lock the carriage in position when you are
Facing
17
The lever on the lathe apron you must engage to cut threads with a lathe is the
Split nut
18
on a leave, adjust the Gibbs on the compound rest
snuggly, but not tight on the compound rest
19
The lathe Chuck that has the greatest holding power is the
Four jaw independent
20
The lathe chug that can hold duplicate pieces of irregular shape is the
Four jaw combination
21
when truing a faceplate for machining, your last option should be
Taking a light facing cut
22
when you take a light cut to true the face of a face plate, you should make only one or two
shallow cuts 0.001 to 0.003
23
What item can you mount on a face plate to hold a work piece that is vertical surface
Angle plate
24
A characteristic that face place and dry place do not share is the
provision, for mounting work on the face
25
The lathe center use only with facing work, held between centers is the
half
26
The lathe center you used to support hollow work is the
pipe
27
The amount of eccentricity for an eccentric mandrel is determined by the
Distance between the offset and center holes
28
The Mandot type you should use to machine surfaces, concentric to threaded holes is the
nut
29
The machine, a one diameter carbon steel rod with a selected cutting foot speed of 80 U determine the lace spindle revolutions per minute with the formula RPM equals CFS times four, divided by D which results in an RPM of
320 RPM
30
when machining, long work pieces with small outside damage to feed rates must be reduced
Because long work pieces tend to spring away
31
The amount of material that should be left on the outside diameter for finishing is
0.010 to 0.020
32
The least accurate method of facing to length is
Facing to split the layout line
33
The purpose of filleted shoulders is to
Strengthen parts
34
You can break a square corner by
Using a file to remove the burr
35
A process of feeding a parting tool into the work piece and then moving it slightly to one side for clearance is
Step parting
36
The method of cutting radii on the lathe that requires simultaneous coordinated movement of the carriage and cross slide is
Hand manipulation
37
The method of cutting radii on the lathe that requires a full scale, layout of the form of the work on a piece of thin sheet metal is
Template and pointer
38
to cut a convex radius while using the compound rest you
position the cutting tool behind the compound rest pivot point
39
Compared to speed for rough turning leg spindle speed for filing metal is
4to5 times faster
40
With the offset tail stock method of cutting tapers, as the length of the work increases the
Amount of taper decreases
41
One disadvantage of using the tailstock, offset method of machining tapers is
You can only machine external tapers
42
The lathe taper, turning attachment component that prevents backlash from developing in the cross slide during operation is the
Drawbar
43
To take depth of cut when using the taper attachment, use the
Compound rest
44
You can keep a drill from turning when you float it on the tailstock center by
mounting it in a lathe dog and resting it on the compound rest
45
when preparing for hand reaming you should rough drill a hole
1/32 undersized
46
to produce a very accurate hand, reamed hole you
drill approximately 1/32 undersize bore within 0.005 and then hand ream
47
The revolutions per minute you should use for machine reaming is
1/2 of the drilling speed
48
The end relief of a boring tool varies with the
Diameter of the hole
49
The position of the boring tool in relation to the work for boring is
5° above center for straight and on center for taper boring
50
to prevent producing bell mouthed holes when boring
Take free cuts to reduce springing
51
in the thread designation 1/4–20 UNC – 3B, the 3B represents a
Close tolerance internal thread
52
Unless otherwise, specified all international organization for standardization, metric, threats are considered
Right hand
53
Thread micrometers are designed to give a direct reading of thread
Pitch diameter
54
when you grind a thread, cutting tool for cutting unified threads, you grind the cutting edge to ensure an included angle of
60°
55
The amount of side relief angle ground on a threading tool, depends upon the
Helix angle of the thread
56
During a threading operation takes successive cuts by setting a depth of cut with the
Compound arrest
57
Before you cut internal threads on a work piece, you must bore the hole to the
Minor diameter of the thread
58
During internal threading operation, positioned the compound rest
29 to 30° to the left of the perpendicular position
59
The main difference between cutting right hand and left-hand threads is when you cut
Left-hand threads, you swivel the compound rest to the left for the external threads
60
The size of the undercut machine in a shot as the star port for a left hand threading tool should be
Equal to a least one thread pitch, wide and slightly deeper than the single thread depth
61
The method of cutting multiple lead threads on the lathe that works best for cutting ACME, and square threads is
Positioning the compound rest parallel to the ways
62
When you set the cutting tool center gauge for cutting taper thread, as you said it to the
Straight portion of the pipe
63
they included angle on the a ACME thread is
29°
64
How wide should you grind the point of a square 13 tool for cutting internal Square threads
slightly less than 1/2 pitch
65
when coming to the end of a cut while machining metric threads on a standard lathe you
Back out the cutting do not disengage the split nut
66
The spindle speed you should use when power tapping a whole with a lathe is
10 to 30 RPM
67
if you’re considering a power tapping operation, restrict the operation to taps of at least a
1/2 diameter
68
The setting for your finish cut when you thread with a geometric dye is the
Actual screw pitch
69
if you allow the work piece to stop without relieving the nursling tool, pressure the
Work May spring
70
if the diametrical pitch and work, blank diameter are not in relation to each other, the nurl
tool does not track properly
71
When dressing a grinding wheel on the post grinder, the final depth of the cut should be
0.0005
72
During an internal grinding operation, the grinding wheel and work piece should rotate
In the same direction at the point of contact
73
by using the micrometer carriage stop, you can position the carrots to a tolerance within
0.0001
74
The factors use identify milling machines are
Size horsepower model and type
75
The size of a milling machine is determined by the
Longitudinal table travel in inches
76
Before you tighten in or loosen the arbor nut on a horizontal milling machine you should
Install the arbor support
77
The backlash and the vertical feet screw of a milling machine table is eliminated by
The weight of the knee
78
The feature on a milling cutter that keeps the cutter tooth from rubbing in the cut as it passes is the
Primary clearance angle
79
The feature of a plane milling cutter that reduces shock and permits a smooth cutting action is
helical tooth
80
The type of milling cutter you would selected, cut off work or mill narrow slots is the
Metal slitting saw
81
The corner on a shill mill easiest to grind is the
chamfered corner
82
While rotating in mills with a right hand cut are designed to
Counterclockwise only
83
The type of email that is best for interrupt the cuts is a
helical fluted
84
what is the width and diameter of a 404 wood rough key seat cutter
1/8 wide and 1/2 diameter
85
The number 54M on a mailing machine taper adapter means the adapter has a number
50 milling machine taper outside, and a number for Morse internal taper
86
if you have a spindle speed of 80 revolutions per minute a chip thickness of 0.004 inch and a card with a 12 teeth what is the correct feed rate determined by using the formula F = T x NT x RPM
3.8 inches per minute
87
The process of milling, a flat surface parallel to the cutters, axis is an example of
Plain milling
88
The process of mailing a flat surface perpendicular to the cutter axis is an example of
Face milling
89
When you select a milling cutter for face milling select one that
Is slightly larger and diameter than the material surface
90
If after taking your first boring cut you notice the hole is not properly located adjust the
Table to bring the spindle to the proper location
91
To mail a square ended keyway in a shaft. You should use a.
Plain milling cutter
92
you align the index head with the longitudinal axis of the milling machine table by using
Keys on the base plate
93
solve the plane indexing solution to machine a hexagon on a round workpiece use of formula T = 40 divided by by N
6 turns 26 holes using a 39 – hole circle
94
when you turn a index crank one complete turn on a 40:1 index the work rotates
9°
95
The type of indexing attachment that is quick and easy to set up and is adjusted by the use of a clutch lever is
Super spacer
96
The milling machine attachment used to machine complex. Compound angles is the.
Toolmakers knee
97
when using the Cartesian system, the spindle axis is
The Z axis
98
If line segments do not begin, and in at the same point when creating geometry for a computer numerical control
Do you have problems? Converting them tool paths.
99
The purpose of a post processing a completed computer, edit design/computer. Edit manufacturing file is it
Converse the program into G code
100
If the toilet offset is not set during the programming phase
Manually set it at the machine before cutter begins