ddt final
describe the steps required in using the mirror feature command
"mirror feature", select feature, continue, select mirror plane in the box, then select the back surface that you want mirror to be on
what are the advantages of using a drawing template?
-greatly reduces the amount of repititon steps -so we dont have to create new settings everytime we want to create a similar drawing
once the scale of a model view is set within an autodesk inventor drawing, how can you change the view scale?
1) double click on the base view and change to the desired scale 2) right click on the base view and select edit view and change to the desired scale
list and describe differences between parametric modeling and traditional 2d computer aided drafting techniques
1) we being with simple designs with little detail "shape before size" 2) ability to update an entire system after changing one parameter 3) capture design intent with geometric and dimensional constraints and parametric equations
how many geometric constraints are available within a sketch while creating the base geometry of an IPT (inventor part)?
12
the ______ in isometric drawing views provides the ability to create, manage, and deliver process-specific info without the need for 2d based documentation
3d annotations
how can you rename existing features in the history tree?
A. Clicking twice on the name of the feature B. use the properties option
how is k-factor used to calculate the flattened length in sheet metal flat patterns
L = A(R+KT)
what is stored in the autodesk inventor tree?
all features that were created within the inventor file
does autodesk inventor allow us to build partially constrained or totally unconstrained solid models? what are the advantages and disadvantages of building these types of models?
allows us to build both. advantage- can be helpful during design stage to develop design intent disadvantage- later in the process when changes are made, the model may not behave the way you want them to
the ____________ command can be used to assist in creating a fully constrained sketch
auto dimension
the orthographic projection direction of an ________ view is set by selecting an existing edge of the parent view within autodesk inventor
auxiliary
what are the required elements in order to generate an auxiliary view within autodesk inventor?
base view and orthographic projections
why is it important to consider the parent/child relationships in between features?
because any modification to a parent feature can also modify one or more of its children features
what is the difference of construction geometry and normal geometry?
both help define, dimension, and constrain. construction- remains in the sketch when profile is turned into 3d feature normal- 3d feature is made from normal geometry
why are work features important in parametric modeling?
can be used to align features or parts in an assembly
identify two of the methods used to create centerlines within an autodesk inventor drawing
center mark and center bisector
identify the different centerline options available in the drawing annotation panel.
center mark, center line bisector, centered pattern
describe the difference between the centerlines created wih the centerline bisector and the center mark commands
centerline bisector- creates centerline that bisects 2 lines center mark- annotates the center of holes, circular edges and cylindrical geometry
what does autodesk inventors associative functionality allow us to do?
change the design at any level, and the system reflects the changes at all levels automatically
how do we align the sketch plane of a selected entity to the screen?
click the look at icon located in the standard toolbar and select a line segment from the 2d sketch
what does CSG stand for?
constructive solid geometry
what is the purpose of using assembly constraints?
controls size, shape, and position of under constrained sketches, features, and parts creates parent/child relationships that allow us to capture design intent of assembly
how do we create an extruded profile in autodesk inventor?
create a finished sketch, select extrude, select a profile, select distance/direction you want the extrusion to be
when describing general guidelines in creating rough sketches, what should you consider doing?
create sketch to proportion, keep sketches simple, exaggerate geometric features, draw geometry so it doesn't overlap, sketched entities should form a closed region (ALL OF THE ABOVE)
what are the advantages/disadvantages of creating fllets using the 3d fillets command and creating fillets in the 2d profiles?
creating fillets using the 3d fillets command is easier than creating fillets in 2d profiles
what are two types of wireframe geometry available in autodesk inventor?
curves and profiles
keeping the history tree in mind, what is the difference between "cut with a pattern" and "cut each one individually"
cutting with a pattern- cutting features are parametrically linked to original feature, so any changes made to the original will changed the arrayed features. cutting individually- this will not happen
what is the difference between dimensional constraints and geometric constraints?
dimensional-describe size and location. geometric-are applied to geometric entities
When extruding, the distance option does not require the output of a number
false
t/f: a rough sketch is precise and exact
false
t/f: once a sketch is created it cannot be modified
false
what is the difference between a feature dimension and a reference dimension?
feature- used to control geometry reference- controlled by existing geometry
which command do we issue to display the flat pattern of a 3d sheet metal design?
flat pattern command
what is the main advantage of using the BORN technique?
greater flexibility for part modifications and design changes
describe the history-based part modification approach
if you decide to change or modify your model at any point, you can access the history tree and choose any part to make corrections. this approach allows us to change/modify without having to start from scratch
describe the procedure to suppress a feature
in the model history tree, right click feature, select suppress feature. (it will appear gray instead of black)
which Boolean operation keeps only the volume common to the two solid objects?
intersect
how can we confirm that a sketch is fully constrained?
inventor will indicate sketch is fully constrained, sketch cannot be moved or modified, the base sketch will change colors (all of the above)
how do you identify a suppressed feature in a model?
it will be gray with a line going through it
identify 3 basic Boolean operations commonly used in computer geometric modeling software
join, cut, and intersect/union, difference, and intersect
the _________ command allows us to create a custom local note to identify specific features in 2d drawings
leader text
what is the k-factor used in sheet metal processes?
location of neutral axis in a bend
list 3 of the commonly used assembly constraints
mate, flush, insert
describe the difference between the mate constraint an the flush constraint
mate- positions components face-to-face flush- aligns components faces in the same direction
how do we move a view in the drawing sheet?
move cursor on top of isometric view and watch for 4-arrow move symbol, click and drag to a new location
can we build a profile that consists of self-intersecting curves?
no
a rough sketch is...
not precise
describe the advantages of using the offset command vs creating a separate sketch
offset advantage- it is associated with the original geometry so you don't have to create a whole separate sketch. also, when the dimensions change for one, they automatically change for the other
name 2 of the geometric constraints and/or symbols used by autodesk inventor
parallel, horizontal, tangent, perpendicular
_______ can be used to associate one dimension to another dimension and autodesk inventor automatically adjusts the dimensions of the design, and the parametric relations we entered are also applied and maintained. then design intent can be embedded into the model
parametric equations
a) create a rough 2d sketch of the basic shape of the base feature of the design b) apply/modify constraints and dimensions to the 2d sketch c) extrude, revolve, sweep the parametric 2d sketch to create base feature d) perform analyses on the computer model and refine e) create desired drawing views
parametric modeling procedure
what are the required elements in order to generate a sectional view?
parent view, cutting line to indicate location of cut
what determines how a model will react when other features in the model change?
parent/child relationships
an inventor ________ view is a standard view
projected
identify primitive solids
rectangular prism, cylinder, cone, sphere, torus
how do we display and examine the existing constraints that are applied to the sketched entities?
right click on the screen and select the show all constraints command, one a sketch is created, hit f8 on the keyboard.
what is one way to access the autodesk inventors edit sketch option?
right click the extrusion or sketch within the extrusion, click edit sketch
how do we create a linear diameter dimension for a revolved dimension?
right click when placing dimension and select linear dimension
what is the main difference between a rough sketch and a profile?
rough sketches are not precise or exact, profiles are precise and exact
a ________ is used to show interior features that cannot be easily shown with a standard view
section view
what is the main difference between a sectional view and a projected view?
sectional- show interior features that cannot be easily shown with a standard view projected- is a standard view
how do we display feature/model dimensions in the drawing mode?
select annotate, right click on feature, select retrieve dimensions, select parts, select your feature, "select dimensions", then choose the dimensions ou want for your drawing
list and describe 2 of the more commonly used sheet metal processes
stretch forming- sheet metal clamped around edges and stretched over a die flanging- straight different sections of sheet metal part and form various shapes
what is the difference between sweep and extrude?
sweep- requires a 3d path extrude- straight path only
how do we distinguish between derived dimensions and regular dimensions on the screen?
the derived dimension vales are displayed with FX in front of the numbers
when extruding, what is the difference between the distance and through all?
the distance option requires the input of a number, while the system will calculate a number for the through all option
what happens to a feature when it is suppressed?
the feature is disabled, but it keeps the info so we can go back and enable at any time. disappears from display area
why is it important to identify symmetrical features in designs?
they can be easily accomplished in autodesk. you can save a lot of time using these tools
describe the purpose of auxiliary views in 2d drawings?
theyre for nonstandard views (such as top, front, or isometric) they help describe true shape of a feature
what is the basic concept of the BORN technique?
to use a Cartesian coordinate system as the first feature prior to creating any solid features
t/f: a base view is a the primary view in the drawing; other views can be derived from this view
true
t/f: a coincident geometric constraint allows two separate end points to be joined
true
t/f: a concentric geometric constraint will force two circular features to share a common center point
true
t/f: a different title block in the drawing mode can be used other than the default title block
true
t/f: a primitive solid is a basic 3d shape
true
t/f: a profile is a complete and precise sketch used to create a solid feature
true
t/f: a section view requires a parent view and a cutting plane line identifying the location of the cut
true
t/f: a sketch will change colors (if the options are set up that way) when it is fully constrained
true
t/f: additional entities within a 2d sketch can be created without having to use them all when the profile is defined
true
t/f: an applied constraint can be deleted from a sketch
true
t/f: an auxiliary view is a supplementary view that can be constructed from any of the regular views
true
t/f: an inventor projected view is a standard view
true
t/f: construction geometry cannot be used as part of the feature profiles
true
t/f: curves and profiles are 2 types of wireframe geometry within autodesk inventor
true
t/f: dimensional constraints are used to describe size and location of individual geometric shapes
true
t/f: extrude is a special case of the sweep command
true
t/f: geometric constraints are geometric restrictions that can be applied to geometric entities
true
t/f: horizontal, parallel, perpendicular, and tangent are commonly used geometric constraints in parametric modeling
true
t/f: symmetry is an important characteristic that is often seen in designs
true
t/f: the 3d annotations in isometric drawing views approach provides the ability to create, manage, and deliver process-specific info without the need for 2d documentation
true
t/f: the autodesk inventor history tree contains all features that were created, including Boolean relations
true
t/f: the history-based part modification approach, which enables us to make modifications to the appropriate features and re-link the rest of the history tree without having to reconstruct the model from scratch
true
t/f: the leader text command allows us to create a local note to identify specific features in 2d drawings
true
t/f: the orthoraphic projection direction of an auxiliary view is set by selecting an existing edge of the parent view
true
t/f: the sweep command allows the use of a 3d path, where the extrude operation is a straight line sweep
true
t/f: to reposition dimensions, move the cursor on top of the dimension and drag the grip points to reposition
true
t/f: using a drawing template greatly reduced the amount of repitition steps
true
what is the first thing we should set up (or establish) in autodesk inventor when creating a new model?
units
how do we modify the pattern parameters after the model is built?
use model history tree by editing pattern parameters
describe two methods available in autodesk inventor to modify the dimension values of parametric sketches
use the "show dimension" option and use the "edit sketch" option
when and why should we use the pattern command?
when your feature requires identical shapes placed. instead of creating individualy features, you can use pattern command which will also have parent/child relationship so you can update them all at the same time
what are the different types of work features available in autodesk inventor?
work planes, axes, or points
can we create a profile with extra 2d geometry entities?
yes
is it possible to construct a solid model first, then convert it to sheet metal?
yes
can a sketched 2d wireframe geometry be copied?
yes - preselect the objects to be copied and use the windows clipboard to copy and paste
can we create additional entities in a 2d sketch, without using them at all?
yes - the 2d sketches used to define a profile can contain additional geometry since the additional geometry entities are consumed when the feature is created
can we adjust the length of centerlines in the drafting mode of inventor? if so, how?
yes, by dragging on of the endpoints
can we delete a drawing view? if so, how?
yes, preselect the drawing view and hit the delete key