ToolingU Knowledge Examination /
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The ____ axis normally describes the longer direction of travel on the
machine, and the ____ axis describes the shorter direction of travel.
X-axis, Y-axis
Each CNC machine has a built-in location that is called ____. This
point is typically located at the _____ direction along the X-, Y-, and Z-
axes, and cannot be changed by anyone after it leaves the original
manufacturer.
machine zero, farthest positive
In addition to machine zero, each part program sets a starting
location called ____.
program zero
If the G codes tell the machine "what to do," and the X, Y, and Z codes
tell the machine "where to do it," the ___ and ___ codes tell the
machine "how fast to do it." These codes are used to set the feed and
speed for the machine as it performs a cutting operation.
F, S
___ codes tell the computer to choose a specific tool, and ____ codes
might tell the computer an assortment of miscellaneous commands.
T, M
The ____ is the series of movements made by a single cutting tool.
toolpath
,Before the operator runs a program for the first time, he or she must
set program zero. You may also see this position referred to as ___ or
___ zero.
work zero or part
On a lathe, ___ offsets adjust the entire turret along the Z-axis from
home position. This offset affects every tool in the turret.
Workshift
On a lathe, ___ offsets adjust cutting tools along both the X-axis and
Z-axis. This offset affects only one cutting tool.
Geometry
The ___ sets the starting place for all the other geometry offsets of
other tools
reference tool
Cutting forces, part deflection, tool wear, etc. can potentially cause
slight changes to tool location and variations in measurements. ___
offsets act as the minor adjustments that compensate for these
variables.
Wear
On a mill, ___ offsets compensate for varying tool lengths in the Z-
axis. Each tool has its own offset.
Tool length
On a mill, ___ adjusts for varying tool diameters. It is only necessary
for tools that travel in the X- and Y-axes.
Cutter radius compensation (CRC)
Like the turning offsets, a workshift offset affects the position of
every tool held in the machining center. For milling, you may also see
this offset referred to as a ___ offset.
fixture
The three areas of an insert are the ____ face, ____ , and ____ edge.
rake, flank, cutting
A ___ ___ is the area of the edge that is abraded away during flank
wear.
wear land
, As a rule, an ____ change in any variable has an equal impact on the
rate of metal removal. For example, if you want to decrease your
metal removal rate by 50%, you can decrease your cutting speed,
your feed rate, or DOC by ____ percent.
equal, 50%
Tool life is least affected by ____. Maximize this whenever possible to
extend tool life
Depth of cut
___ ___ has the next highest impact on tool life. Maximize it only after
you have maximized Depth of Cut (DOC).
Feed rate
____ has the greatest impact on tool life. It is the variable you use to
strike the balance between tool life and productivity.
Speed
Set your speed only after you have maximized ____ and ____.
DOC and feed rate
Flank wear is only a problem if ___.
it occurs too rapidly
To eliminate rapid ____:
Reduce the speed.
Select an insert with a harder grade.
Increase the clearance angle.
Reduce edge hone.
Reduce corner radius.
Use a coated carbide insert, such as an aluminum oxide (Al2O3)
coated grade, to counter diffusion.
flank wear
Define diffusion
wearing of material due to atom exchange, such as flank wear
____ wear is the formation of a depression in the rake face behind the
cutting edge of an insert.
Crater
Newest Version with Well Elaborated
Questions and Answers / 100% Solved /
Already Rated A+
The ____ axis normally describes the longer direction of travel on the
machine, and the ____ axis describes the shorter direction of travel.
X-axis, Y-axis
Each CNC machine has a built-in location that is called ____. This
point is typically located at the _____ direction along the X-, Y-, and Z-
axes, and cannot be changed by anyone after it leaves the original
manufacturer.
machine zero, farthest positive
In addition to machine zero, each part program sets a starting
location called ____.
program zero
If the G codes tell the machine "what to do," and the X, Y, and Z codes
tell the machine "where to do it," the ___ and ___ codes tell the
machine "how fast to do it." These codes are used to set the feed and
speed for the machine as it performs a cutting operation.
F, S
___ codes tell the computer to choose a specific tool, and ____ codes
might tell the computer an assortment of miscellaneous commands.
T, M
The ____ is the series of movements made by a single cutting tool.
toolpath
,Before the operator runs a program for the first time, he or she must
set program zero. You may also see this position referred to as ___ or
___ zero.
work zero or part
On a lathe, ___ offsets adjust the entire turret along the Z-axis from
home position. This offset affects every tool in the turret.
Workshift
On a lathe, ___ offsets adjust cutting tools along both the X-axis and
Z-axis. This offset affects only one cutting tool.
Geometry
The ___ sets the starting place for all the other geometry offsets of
other tools
reference tool
Cutting forces, part deflection, tool wear, etc. can potentially cause
slight changes to tool location and variations in measurements. ___
offsets act as the minor adjustments that compensate for these
variables.
Wear
On a mill, ___ offsets compensate for varying tool lengths in the Z-
axis. Each tool has its own offset.
Tool length
On a mill, ___ adjusts for varying tool diameters. It is only necessary
for tools that travel in the X- and Y-axes.
Cutter radius compensation (CRC)
Like the turning offsets, a workshift offset affects the position of
every tool held in the machining center. For milling, you may also see
this offset referred to as a ___ offset.
fixture
The three areas of an insert are the ____ face, ____ , and ____ edge.
rake, flank, cutting
A ___ ___ is the area of the edge that is abraded away during flank
wear.
wear land
, As a rule, an ____ change in any variable has an equal impact on the
rate of metal removal. For example, if you want to decrease your
metal removal rate by 50%, you can decrease your cutting speed,
your feed rate, or DOC by ____ percent.
equal, 50%
Tool life is least affected by ____. Maximize this whenever possible to
extend tool life
Depth of cut
___ ___ has the next highest impact on tool life. Maximize it only after
you have maximized Depth of Cut (DOC).
Feed rate
____ has the greatest impact on tool life. It is the variable you use to
strike the balance between tool life and productivity.
Speed
Set your speed only after you have maximized ____ and ____.
DOC and feed rate
Flank wear is only a problem if ___.
it occurs too rapidly
To eliminate rapid ____:
Reduce the speed.
Select an insert with a harder grade.
Increase the clearance angle.
Reduce edge hone.
Reduce corner radius.
Use a coated carbide insert, such as an aluminum oxide (Al2O3)
coated grade, to counter diffusion.
flank wear
Define diffusion
wearing of material due to atom exchange, such as flank wear
____ wear is the formation of a depression in the rake face behind the
cutting edge of an insert.
Crater
