MFG 102 Final Exam
Feed per revolution
FPR stands for ____
dry run
Generically speaking, a ____ refers to running a machine with disabled functions to eliminate the potential for collisions
TNRC
Once ____ is properly turned on, the MCU makes all the necessary compensation and the part coordinates may be programmed as though the cutting tool did not have a radius at all
spring
___ collets are very accurately ground cylindrical sleeves
polar
___ coordinates require that positions be identified by defining both an angle and a distance (like a vector in math)
collets
___ have holes in their centers to match the size and shape of the workpiece to be held
friability
___ is the ability of the individual abrasive grains to fracture during grinding to create new, sharp edges
conversational
___ programming was developed to simplify the machine programming process
HMC
____ 's popularity is due partly to the versatility of workholding, the inherent rigidity of the machine's column, and the ability to allow gravity to help remove chips out of the machining area
squaring
____ a workpiece means machining the sides of a workpiece perpendicular and parallel to each other
bonding agents
____ act as the glue that holds individual abrasives together in the shape of a wheel
vises
____ are the most commonly used workholding devices for milling
cnc collet chucks
____ consist of a straight round shank with a tapered bore
single-pass drilling
____ cycles feed the tool continuously to the programmed Z-depth
chamfer
____ endmills are used to produce a bevel on the workpiece edge
cylindrical
____ grinders are used to grind diameters, shoulders, and faces much like the lathe is used for turning, facing, and boring operations
horizontal spindle surface
____ grinders typically use the periphery of a solid wheel to grind workpiece surfaces
vertical spindle surface
____ grinders use the side of a grinding wheel to grind workpiece surface
facing
____ is cutting across the end of a workpiece to machine the end flat
knurling
____ is producing a raised pattern on the circumference of a workpiece
tramming
____ is the process of adjusting the head so that the spindle is perpendicular to the top surface of the machine table
boring
____ is using a single-point cutting tool to enlarge an existing hole
conventional
____ milling is feeding the workpiece in against the rotation of the cutting tool
face
____ milling is using the face of the cutting tool to machine a surface
single-block
____ mode allows the ability to execute only one block of the program at a time
MDI
____ mode provides a blank program screen for entering short programs or single program commands
wear
____ offsets are used when a size adjustment needs to be made after a given tool has been satisfactorily producing parts for a while
wear
____ offsets may be used to compensate and adjust for wear as the tool is used during production
depth of cut
____ refers to the distance that the cutting tool is engaged in the workpiece
grain
____ sizes from 46 to 60 are commonly used for general-purpose surface grinding operations
pallet
____ systems use two or more work holding tool plates that can be quickly and accurately interchanged on the machine's table
buttress
____ threads are easily identified since the thread form is asymmetrical
right-hand
____ threads have a helix that causes assembled fasteners to get tight when rotated clockwise
live
____ tools are small motorized spindles that enable a turning machine to perform light-duty milling and to perform hole-work such as drilling-tapping, and reaming off-center and cross-way
rocker-type
____ tools posts and holders have been largely replaced since they do not offer as much rigidity as newer toolholding methods
rapid
____ traverse is designated by the code G0
type 1 straight
____ wheels are probably the most widely used wheel for surface and cylindrical grinding operations
CBN
____ wheels are second in hardness after diamond wheels
rapid override
_____ controls slow rapid motion while a program is running or vary the jogging rate
grooves
_____ may be needed to accept O-rings or retaining rings, act as a relief for threading, or to provide clearance on shoulders for mating parts
machine
_____ vises are the most commonly used workholding devices for milling because they are highly versatile, accurate, and simple to use
large
_____ workpieces that require direct clamping usually need to be aligned
G
_____-codes prepare a machine to engage in the particular mode for machining
turning
____is reducing the outside diameter of a workpiece
VDI
____tool-mounting adapters have a round shank with a serrated tooth pattern
gang tool
____type machines typically are of a flat bed design and are fitted with a carriage where tools are installed
magnetic
____workholding devices contain alternating segments of ferrous and nonferrous materials that are mounted together to form a single unit
side
___grinding should be performed when it is not possible to grind two perpendicular surfaces by repositioning the workpiece
deep-hole
a G83 is for the ____ drilling cycle and fully retracts the tool from the hole between pecks
micro
a ___ drill press operates at very high spindle speeds and is used to produce very small holes
tapping
a ___ head is specially designed tool that allows the spindle to be run to drive taps
protractor
a ____ aids in the position the head at the desired angle
edge finder
a ____ can be used to very accurately find a reference end
steady rest
a ____ clamps directly to the lathe's ways and acts as a brace to surround and support the workpiece
shell
a ____ endmill is a multiple-flute hollow cutter that is mounted onto an arbor
tool and cutter
a ____ grinder is used for tool sharpening while the cutting tools are held in workholding devices and machine slides provide movement for much greater control and flexibility
mandrel
a ____ is a special precision cylindrical shaft that can be inserted through the center bore of the workpiece to secure it for machining
fixture
a ____ is a workholding device speciifially designed to accommodate a specific workpiece
sub-spindle
a ____ is an auxiliary secondary spindle, which opposes the machine's main headstock spindle
wiggler
a ____ is sometimes used to position the workpiece under the center of the drill press spindle
servo
a ____ motor is a hybrid electric motor with half motor/half position sensor
indexable
a ____ tool posts consists of a t-nut, clamping stud, and a multi-sided tool block with either removable to integral toolholders
collet
a ____ type fixture can be used to spin a workpiece beneath the grinding wheels to grind diameters
bar puller
a _____ is a tool that is mounted to the turret and, when programmed, can approach the remaining bar material after a part has been cut off
face
a _____ mill is a multiple-cutting-edge milling cutter that has replaceable inserted cutting edges
gang
a ___drill press contains multiple drilling heads attached to a single base and worktable
pilot
a counterbore has a guide on its end called a ____ that keeps the counterbore aligned in the existing hole
sensitive
a drill press without a power-feed mechanism is sometimes called a ____ drill press because the operator can "feel" the cutting action of the tool and adjust the rate of feed for optimal cutting pressure by increasing or decreasing pressure on the feed handle
45
a magnetic v-block can be used to hold a workpiece at a ___-degree angle and extends the magnetism of a check to the workpiece
machinability
a relative measure of how easily a material can be machined is called its ____
spotting
after the workpiece is position and securely clamped, a center drill is usually used to create a more positive starting point for a twist drill. This operation is sometimes called ____
A
aluminum oxide and ceramic aluminum oxide wheels are identified by the letter ____
diamond
aluminum oxide and silicon carbide wheels are dressed and trued simultaneously using a ____ dresser
end of block
at the very end of each block is a semicolon (;) character is called a _____ character
silicon carbide
green wheels are the purest form of ____ wheels
thru holes
holes that are drilled entirely through a workpiece are called ____
thread micrometer
if ring gages or a _____ is not available, the three-wire method may be used to measure pitch diameter
clearance plane
in CNC mill programming, it is standard practice to establish a safety zone above the workpiece of workholding device called a ____
graphic simulation
is a quick way to troubleshoot obvious programming issues, but doesn't analyze an actual machine setup or small positioning errors
heel
lip clearance is the relief angle from the lips back to the ____
parallels
magnetic _____ are not magnetic by themselves but are designed to extend the magnetic field of the chuck to the workpiece
stub arbor
milling cutters are secured onto a _____ for mounting in the machine spindle
arbors
milling cutting tools may be mounted either with ___ or directly to their shanks
HSS
milling cuttings may be made from one solid piece of ____ or carbide
sleeve
morse taper ____ adapters increase the size of a tool's shank taper
tombstone
most commonly used in horizontal spindle machines, a ____ is a tower with multiple vertical working surfaces where workholding devices are mounted
linear guides
most modern cnc machines employ a high-tech modernized version of ways called ___
cutter radius
offsetting the path of the cutting tool is called ___ compensation
automatic
once the production performance is proved satisfactory, the machine is now ready to be run in ____ mode
geometry
once the tool measurement has been determined, the tool offset measurements are stored in the machine's ____ offset page
cutoff
performing a ____ operation on the lathe uses a special narrow tool to take off the end workpiece to a desired length
sine
precision angles can be ground using a magnetic ____ chuck
centerless
production grinding of the outside shafts and tubes can be performed with the ____ grinder
word
programming code that the machine can understand is called ____address
CAM
programming is done largely with the aid of specialized computer software on a regular personal computer called ___ software
solid models
some drawings, called ____, look like solid illustrations of the actual part and are much more realistic looking
rigid
some machines have a more accurate method of mating the spindle RPM and feed rate throughout the entire tapping cycle, which is called ____ tapping
dressing
superabrasive wheels should first be trued to eliminate runout using a brake truing device and then dressed using a ___ stick
tailstock
the ___ can be used to secure workholding accessories to help support workpiece in many operations
ballnose
the ___ endmill is an endmill with a half-round sphere ground on its end
longitudinal-feed
the ___ hand wheel rotated to move the table left and right
shank
the ___ of a drill bit provides an area for mounting the drill bit into a holder
grade
the ___ of a grinding wheel refers to its hardness or strength of the bond and ranges from A - Z
Morse
the ___ taper is a popular standardized style of taper used in drill press spindles and for holemaking tools
swing-arm-type
the ___ tool changer uses a double-ended arm to change tools
ram
the ____ allows the entire head to be moved forward and backward and then locked in position
helix
the ____ angle is the angle of a thread's spiral relative to the center axis of the part
pin vise
the ____ chuck is a micro drill chuck that has a much slimmer design, has a smaller capacity, and will enable very small drills to run truer than a larger chuck
quill
the ____ feed handle can be used when performed holemaking operations or to position cutting tools for milling operations
CAT
the ____ flange was originally developed specifically for CNC use by caterpillar inc
jig
the ____ grinder provided more precise X- and Y- axis movements than a vertical milling maching for extremely accurate positioning
margin
the ____ is a thin raised strip that runs the length of the drill body along the edge of the flutes and gives the drill bit its diameter
leadscrew
the ____ is a very long threaded rod supported by bearings at both ends
saddle
the ____ is an H-shaped casting that slides back and forth on the ways
angle plate
the ____ is most often used when a hole is to be drilled perpendicular to a large flat surface on the workpiece
dividing head
the ____ is mostly used for rotating the workpiece to a position and then securing it there for machining
helix angle
the ____ is the angle of a drill's spiral relative to the center axis of the drill
spindle
the ____ is the part of the drill press that holds and rotates the cutting tool
flank
the ____ is the thread surface that joins the crest to the root
MCS
the ____ is used for the machine's own reference purposes and helps it to keep track of how far each axis can move before it runs out of travel
retention
the ____ knob is gripped by a power-actuated drawbar mechanism in the machine spindle to secure the mating tapers
lips
the ____ of a drill are the angled cutting edges that shead the metal into chips as the drill rotates
swing
the ____ of the lathe is determined by the biggest diameter workpiece that can be mounted in the spindle without touching the ways
facing
the ____ operation is usually operation to be performed on a turned workpiece
homing
the ____ procedure is used to rezeroe and establish MCS location so that is may begin keeping track of position again
turret
the ____ rests on this surface and allows the entire machine head to be swiveled 360 degrees
first
the ____ step in aligning a turret is to indicate an angle plate parallel with the y-axis by moving the saddle
radial-arm
the _____ drill press is the largest of the drilling machines
spindle
the _____ is a precisely ground shaft
pecking
the alternating drilling and retracting motion of a quill to clear chips from the point is called____
WCS
the cartesian coordinate system that identifies the location of the origin on the workpiece is called the ___
work
the distance from the MCS to the WCS is called ____ offset
body
the drill ____ extends from the tip to the beginning of the shank and makes up the majority of the drill bit
geometry
the entirety of the what makes up a drawing is referred to as ___ in many software packages
chuck key
the jaws are closed and opened by inserting a special wrench called a ____ into a socket on the chuck
bed
the lathe ____ is located on the right side of the headstock and is the foundation of the entire machine
holemaking
the major benefit of performing ____ operations using the vertical mill is the ability to more precisely establish hole locations
surface
the primary purpose of a ____ grinder is to produce flat surface
CAD
the very first step in using specialized computer software is to make a drawing with ____ software
chisel edge
the___ does no actual cutting but is instead forced into the material when drilling
rotary table
the___consists of a heavy base on which a circular worktable is mounted
drill drift
to remove a taper-shank tool from the drill press spindle, a wedge-shaped____is inserted between the tapers through an opening in the spindle and lightly tapped with a hammer
program stop
two M- codes can be used to cause a _____, or hold, on the program until it is resumed by pressing the cycle start button on the MCU
turning center
when a cnc lathe is equipped with an automatic tool changer it is called a ____
zero
when an indicator reads ____ throughout a full sweep, the spindle has been aligned with the centerline of the round feature
radially
when programmed ____, all X coordinates are given as a radius of the part
pilot hole
when the desired hole is larger than 1/2" in diameter, a smaller hole called a ____ is often drilled before the larger drill bit is used
tool height
where the machine knows where the tool tip is so that the tool can be programmed from its tip regardless of its length, this is called the ____ offset
one
you should offset ____ of the mill table axes to cut a radius
ring
you should perform a ____ test to be sure that the wheel is not defective
