IME 146 FINAL QUESTIONS & ANSWERS
allowance equation - Answer -MMC internal feature - MMC external feature = tightest fit
between parts
clearance equation - Answer -LMC internal feature - LMC external feature = loosest fit
between parts
three components of cnc machines - Answer -program of instructions, machine control
unit, processing equipment
three main ways G&M code can be created for a CNC machine - Answer -
conversational programming, CAD/CAM programming, manual programming
CNC milling G&M code is based off the __________ coordinate system - Answer -
cartesian
the most common WCS G code - Answer -G54
A ___ code is a preparatory function, it preps the CNC machine for some sort of motion.
- Answer -G
An __ code is a miscellaneous function that causes an action to occur within the G&M
code - Answer -M
The _______ _________ generates the machine specific G&M code for the CNC
machine in the CAD/CAM system - Answer -post process
As material leaves the injection molding machine nozzle and enters the mold cavity, the
flow path of the material is: - Answer -nozzle, sprue, runner, gate, cavity
what does the term "flash" mean in the context of injection molded parts? - Answer -a
volume of injected material escaped out of the mold cavity and between the mold
halves, leaving a thin section of material attached to the part precisely on the parting
line
what is the most common cause of a mold cavity to not have enough material injected
into it? - Answer -the injection molding machine has the injection pressure set too low
what connects the mold to the injection molding machine's nozzle and is the sealing
interface between the mold and the machine? - Answer -sprue bushing
what term is used to describe the angle on vertical walls of a mold to aid in the part
releasing correctly from the mold? - Answer -draft
, the term used to describe an injection event which does not entirely fill the mold cavity
or cavities? - Answer -short shot
what are the two primary causes of "flash" - Answer -clam force too low, injection
pressure too high
what type of polymers are utilized in the injection molding manufacturing process -
Answer -thermoplastic
the four distinct categories of nontraditional machining methods based on the energy
used to machine the workpiece - Answer -mechanical, electrical, thermal, chemical
advantanges of the EDM process listed below - Answer -no cutting forces imparted into
the work piece, high aspect ratio cutting can be achieved, ability to cut hardened
workpiece materials, intricate details can be machined
what are the two types of electronic discharge machining (EDM) systems - Answer -
sinker die, wire
in opposition to traditional manufacturing processes do not use ____ stress to remove
material from the workpiece - Answer -shear
the chemical milling process is best suited to what types of materials - Answer -thin
metals such as sheet metal and foil
the most common use of laser beams in part production manufacturing - Answer -
heating, welding, cutting, marking
the EDM process requires the work piece material to be machined is ____________
conductive. For this reason, plastic, wood, and fiberglass (to name a few) cannot be
machined with the EDM process - Answer -electrically
advantages of laser cutting - Answer -fragile flimsy parts can be cut, high speed cutting,
no cutting forces are imparted into the work piece, the laser does not get dull like
traditional manufacturing tools
three most common types of lasers used in part production manufacturing - Answer -
CO2, fiber, yag
heat affected zone - Answer -area of material in the immediate vicinity of a cut which
has altered properties due to the high temperature induced into the workpiece.
two techniques used to apply the acid resist to a workpiece in chemical milling - Answer
-spray/dip, photoresist using UV light and photo tool
allowance equation - Answer -MMC internal feature - MMC external feature = tightest fit
between parts
clearance equation - Answer -LMC internal feature - LMC external feature = loosest fit
between parts
three components of cnc machines - Answer -program of instructions, machine control
unit, processing equipment
three main ways G&M code can be created for a CNC machine - Answer -
conversational programming, CAD/CAM programming, manual programming
CNC milling G&M code is based off the __________ coordinate system - Answer -
cartesian
the most common WCS G code - Answer -G54
A ___ code is a preparatory function, it preps the CNC machine for some sort of motion.
- Answer -G
An __ code is a miscellaneous function that causes an action to occur within the G&M
code - Answer -M
The _______ _________ generates the machine specific G&M code for the CNC
machine in the CAD/CAM system - Answer -post process
As material leaves the injection molding machine nozzle and enters the mold cavity, the
flow path of the material is: - Answer -nozzle, sprue, runner, gate, cavity
what does the term "flash" mean in the context of injection molded parts? - Answer -a
volume of injected material escaped out of the mold cavity and between the mold
halves, leaving a thin section of material attached to the part precisely on the parting
line
what is the most common cause of a mold cavity to not have enough material injected
into it? - Answer -the injection molding machine has the injection pressure set too low
what connects the mold to the injection molding machine's nozzle and is the sealing
interface between the mold and the machine? - Answer -sprue bushing
what term is used to describe the angle on vertical walls of a mold to aid in the part
releasing correctly from the mold? - Answer -draft
, the term used to describe an injection event which does not entirely fill the mold cavity
or cavities? - Answer -short shot
what are the two primary causes of "flash" - Answer -clam force too low, injection
pressure too high
what type of polymers are utilized in the injection molding manufacturing process -
Answer -thermoplastic
the four distinct categories of nontraditional machining methods based on the energy
used to machine the workpiece - Answer -mechanical, electrical, thermal, chemical
advantanges of the EDM process listed below - Answer -no cutting forces imparted into
the work piece, high aspect ratio cutting can be achieved, ability to cut hardened
workpiece materials, intricate details can be machined
what are the two types of electronic discharge machining (EDM) systems - Answer -
sinker die, wire
in opposition to traditional manufacturing processes do not use ____ stress to remove
material from the workpiece - Answer -shear
the chemical milling process is best suited to what types of materials - Answer -thin
metals such as sheet metal and foil
the most common use of laser beams in part production manufacturing - Answer -
heating, welding, cutting, marking
the EDM process requires the work piece material to be machined is ____________
conductive. For this reason, plastic, wood, and fiberglass (to name a few) cannot be
machined with the EDM process - Answer -electrically
advantages of laser cutting - Answer -fragile flimsy parts can be cut, high speed cutting,
no cutting forces are imparted into the work piece, the laser does not get dull like
traditional manufacturing tools
three most common types of lasers used in part production manufacturing - Answer -
CO2, fiber, yag
heat affected zone - Answer -area of material in the immediate vicinity of a cut which
has altered properties due to the high temperature induced into the workpiece.
two techniques used to apply the acid resist to a workpiece in chemical milling - Answer
-spray/dip, photoresist using UV light and photo tool
