Inventor 2011
Inclined Surfaces
Inclined Surfaces
Normal = Horizontal or Vertical
in space
Normal surfaces are either horizontal or vertical in space. (Parallel to or perpendicular to the
Solid Edge reference planes).
Inclined surfaces have a single slant in space.
These surfaces are very common in construction
(roofs) and on machine parts.
Inclined =
Single slant
in space
Oblique surfaces have a double slant in space
They are referred to as compound-angle surfaces. (See next chapter).
Oblique = Double
slant in space.
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Inclined Surfaces
Inventor 2011
Inclined Surfaces in Space
An inclined surfaces appears as an slanting
edge-of-surface in one view and as a foreshortened surface in the other two views. Notice that the “T” shaped surface on the object
is perpendicular to the front reference plane
and is at an angle to the top reference plane.
Because the T-shaped surface is at an angler
to the top reference plane, it’s projection to
the top view creates an image shorter than
the actual extent of the surface (foreshortened
view).
The same is true for the projection to the right
reference plane. The resulting view shows a
surface shorter than it’s actual extent.
Notice that the shape of the surface is the
same in the top and side views.
Inclined surface theory
An inclined surface appearing as an inclined
line in the front view will appear as a foreshortened surface in the top view and as a
foreshortened surface in the side view.
The surface will have the same general shape
in each of the views.
Inc-2
Inventor 2011
Inclined Surfaces
An inclined surface appearing as an inclined
edge-of-surface in the top view will appear
as a foreshortened surface in the front view
and as a foreshortened surface in the side
view.
The surface will always have the same number of corners and edges.
An inclined surface appearing as an inclined
edge-of-surface in the side view will appear
as a foreshortened surface in the front view
and as a foreshortened surface in the top
view.
The surface will always have the same parallel and non-parallel edges in each of the
views.
The inclined surface chart is show below.
Read across. This is the complete set of
rules for inclined surfaces. Knowing this is
true helps to visualize inclined surfaces on
drawings.
Modeling Inclined Surfaces
Specifying Inclined Surfaces
Inclined surfaces may be dimensioned in one
of two ways:
● Angle of inclined edge.
● Offset dimensions for inclined edge.
Angle Dimensioned
Inc-3
Offset Dimensioned
Inclined Surfaces
Inventor 2011
Inclined Surface - Angle Specified
Create a protrusion
● Draw the sketch
● Dimension to shape
Use angular dimension from the
pop-down menu
Finish the sketch.
Inclined surface - offset dimension
specified
● Draw the outline.
● Use the distance between
dimension option.
● Finish the shape.
Tutorial - Inclined Surfaces 1
A drawing of the part is shown below. Note: Front, Top and Left side views are used.
Inc-4
Inventor 2011
Inclined Surfaces
A Left sketch plane is needed to sketch the left side view.
__ Start a new (English) part.
__ Click the + next to Origin
__ Right click each reference plane and turn on the visibility for
each reference plane.
__ Check the view orientation using Free Orbit.
Front-Right-Top is the usual starting view.
Top
Plane
Right
Plane
Front
Plane
Top
Plane
__ Using Free Orbit, roll the planes
so the Front-Top-Left orientation is
shown.
Front
Plane
left
Plane
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Inclined Surfaces
Inventor 2011
__ Start a sketch on the Left Plane
__ Draw the 1.500 and 2.750 lines.
Start at the Origin point.
__ Draw the 45 degree and 75 degree lines
any length as shown.
__ Draw a temporary vertical line
2.00 inches over as shown.
__ Use Modify ... Trim to trim the 45 degree line
as shown.
__ Delete the temporary vertical line.
Inc-6
Inventor 2011
Inclined Surfaces
__ Draw the 30 degree line any
length as shown.
__ Trim the lines to create the
finished sketch.
__ Save your drawing.
__ Extrude the sketch 5.00
inches.
__ Save the part.
Inc-7
Inclined Surfaces
Inventor 2011
__ Start a sketch on
the Front plane.
Use Project
Geometry
to place lines from
the part onto the
sketch.
__ Draw the 45
degree triangle and
Extrude remove material.
__ Start another sketch on the front plane.
Project the top and left part edges to the sketch.
__ Draw a 30 degree line any length.
Trim the lines to form a 30 degree triangle.
__ Extrude - remove material to create the surface.
__ Save the finished part. (Set Block)
Inc-8
Inventor 2011
Inclined Surfaces
__ Make a drawing. Place Dimensions. Save and Print.
Inc-9
Inclined Surfaces
Inventor 2011
Tutorial - Inclined Surfaces 2
Some part features must be modeled using an inclined reference plane.
In the example the base was modeled first then the inclined protrusion was added. Choosing the start point for
the base in relation to the reference planes is very important when beginning a new construction.
The upper corner of the base was the critical location. The base was drawn in the 3rd quadrant.
__ Start a new Part. Dimensions for this layout are METRIC.
PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT
3
100.00
4
2
1
R32.50
B
B
P26X40Z10
.00
50
.00
40
70.00
20.00
60.0°
A
A
20.00
DRAWN
CRAIG, J
WASHINGTON UNIVERSITY
IN ST. LOUIS
DATE
150.00
TOLERANCES
MM = +/- .8MM
MM.M = +/- .3MM
ANGLES = +/-
1
2
DEGREE
TITLE
SIZE
B
SCALE
4
3
2
__Turn ON
visibility
for
Reference
Planes.
__ Start
Sketch on
Front
Plane
Inc-10
ANGLE BASE
REV
DWG NO
AngleBase
SHEET
1
1
OF
1
Inventor 2011
__ Start the sketch at the Origin point
Inclined Surfaces
Edge of TOP plane
Origin Point
__ Sketch the base outline as shown.
3rd Quadrant
Edge of
RIGHT
plane
__ Extrude the base 100mm
__ SAVE the part ANGLE BASE.
__ Create a work plane through the
edge as shown. Follow steps to create
the work plane.
Angle was measured from the vertical
face.
Inc-11
Inclined Surfaces
Inventor 2011
__ Start a sketch on the work plane.
__ Draw the outline as shown.
(See drawing on previous page
for dimensions)
__ Extrude the sketch to the
top surface of the base.
Set extent of Extrude
Inc-12
Inventor 2011
Inclined Surfaces
Create the Counterbored Hole
__ Use the Hole option.
Concentric.
Set the values as shown.
__ Save the part.
Inc-13
Inclined Surfaces
Inventor 2011
Tutorial - Detail Drawing - ANSI
(American National Standards Institute)
A detail drawing is used to produce a part. It must have all the information needed to build the part.
● Views - to define and clarify the shape.
● Dimensions - to specify size and accuracy.
● Shop manufacturing notes.
● Materials, etc.
Dimension Accuracy
Tolerances
English
.X = +/- 0.10 in
.XX = +/- 0.030 in
.XXX = +/- 0.010 in
Metric
M = +/- 0.8mm
0.M = +/- 0.3 mm
Angles
+/- ½ degree
All dimensions except for a few special forms have a required accuracy. No dimension can be perfect so an allowable error must be shown.
Some dimensions must be more accurate than others. One
method of specifying the accuracy is by the number of decimal places shown in the dimension. .X, .XX and .XXX all
have a different accuracy requirement. This is shown in the
Tolerance Block. Two decimal places (+/- .03in) is common
for most dimensions. ( .06 inches is about the thickness of a
dime).
A Tolerance Block is shown in the
title block for Detail drawings.
2
1
(Complete
Set Block
Drawing)
B
B
PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT
5.00
75°
30
2.75
30°
1.38 45°
45°
1.50
2.00
ITEM
1
QTY
1
PARTS LIST
PART NUMBER
SetBlock-2-2
DESCRIPTION
Clauding Mill Job 2-2
MATERIAL
Steel
DRAWN
A
WASHINGTON UNIVERSITY
IN ST. LOUIS
DATE
TOLERANCES
TITLE
.X = B .1 IN
A
SET BLOCK
.XX = B .03 IN
.XXX = B .010 IN
ANGLES B
1
2
DEGREE
2
SIZE
DWG NO
A
SCALE
1
Inc-14
REV
Inventor 2011
Inclined Surfaces
Angle Base Drawing
__ Create the regular views.
(B-size metric drawing)
4
__ Click the Auxiliary View icon.
3
2
1
B
B
__ Click the front view
and click the 60 degree line to set
the direction.
__ Place the auxiliary view.
__ Dimension as shown.
A
A
DRAWN
WASHINGTON UNIVERSITY
IN ST. LOUIS
DATE
TITLE
TOLERANCES
MM = +/- .8MM
MM.M = +/- .3MM
Dimensions must be placed where
the shape shows best.
ANGLES = +/-
1
2
DEGREE
REV
DWG NO
SIZE
B
SCALE
4
3
100.00
4
3
SHEET
2
1
2
1
OF
1
1
R32.50
B
B
P26X40Z10
.00
50
.00
40
70.00
20.00
60.0°
A
A
20.00
DRAWN
CRAIG, J
WASHINGTON UNIVERSITY
IN ST. LOUIS
DATE
150.00
TOLERANCES
MM = +/- .8MM
MM.M = +/- .3MM
ANGLES = +/-
1
2
DEGREE
TITLE
SIZE
B
SCALE
4
3
2
Inc-15
ANGLE BASE
REV
DWG NO
AngleBase
SHEET
1
1
OF
1
Inclined Surfaces
Inventor 2011
Problem 1.
A. Model the part. B. Create a drawing. Front, top, right and isometric views.
C. Animate Front-top-front-right-front .
Height of
groove
Distance from bottom of
part to bottom of groove.
Problem 2.
A. Model the part. B. Create a drawing. Front, top, right and isometric views.
C. Animate Front-top-front-right-front-isometric-front.
Inc-16
Inventor 2011
Inclined Surfaces
Inc-17