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ToolingU Knowledge Study Guide Solutions The ____ axis normally describes the longer direction of travel on the machine, and the ____ axis describes the shorter direction of travel. - ANSWER-X-axis, Y-axis Each CNC machine has a built-in location that is called ____. This point is typically loc...

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  • November 11, 2024
  • 20
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • toolingu knowledge study guide solutions

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ToolingU Knowledge Study Guide

Solutions


The ____ axis normally describes the longer direction of travel on the machine, and the ____ axis

describes the shorter direction of travel. - ANSWER✔✔-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. - ANSWER✔✔-machine zero, farthest positive


In addition to machine zero, each part program sets a starting location called ____. - ANSWER✔✔-

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. - ANSWER✔✔-F, S


___ codes tell the computer to choose a specific tool, and ____ codes might tell the computer an

assortment of miscellaneous commands. - ANSWER✔✔-T, M


The ____ is the series of movements made by a single cutting tool. - ANSWER✔✔-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. - ANSWER✔✔-work zero or part




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On a lathe, ___ offsets adjust the entire turret along the Z-axis from home position. This offset affects

every tool in the turret. - ANSWER✔✔-Workshift


On a lathe, ___ offsets adjust cutting tools along both the X-axis and Z-axis. This offset affects only one

cutting tool. - ANSWER✔✔-Geometry


The ___ sets the starting place for all the other geometry offsets of other tools - ANSWER✔✔-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. - ANSWER✔✔-Wear


On a mill, ___ offsets compensate for varying tool lengths in the Z-axis. Each tool has its own offset. -

ANSWER✔✔-Tool length


On a mill, ___ adjusts for varying tool diameters. It is only necessary for tools that travel in the X- and Y-

axes. - ANSWER✔✔-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. - ANSWER✔✔-fixture


The three areas of an insert are the ____ face, ____ , and ____ edge. - ANSWER✔✔-rake, flank, cutting


A ___ ___ is the area of the edge that is abraded away during flank wear. - ANSWER✔✔-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. - ANSWER✔✔-equal, 50%



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Tool life is least affected by ____. Maximize this whenever possible to extend tool life - ANSWER✔✔-

Depth of cut


___ ___ has the next highest impact on tool life. Maximize it only after you have maximized Depth of Cut

(DOC). - ANSWER✔✔-Feed rate


____ has the greatest impact on tool life. It is the variable you use to strike the balance between tool life

and productivity. - ANSWER✔✔-Speed


Set your speed only after you have maximized ____ and ____. - ANSWER✔✔-DOC and feed rate


Flank wear is only a problem if ___. - ANSWER✔✔-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. -

ANSWER✔✔-flank wear


Define diffusion - ANSWER✔✔-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. -

ANSWER✔✔-Crater



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