Lesson 8 – Modeling the Truck Base
Section III – Modeling Complex Parts 8.3 Modeling the Truck Base
Select the top surface of the
base.
Select Circle on the Sketch
tab and sketch one hole.
Use Smart Dimension and
type the diameter of 0.25
inch.
The center of the holes
should be a minimum of
one diameter from the edge
of the plate. This is a design
rule of thumb that prevents
stress concentration and
possible failure if the hole is
too close to the edge.
Use Smart Dimension to
establish the distance
between the center of the
hole and one edge. Instead
of typing a number, click the
pull-down menu in the
dialog box and select
Equation.
Click on the 0.250 diameter
of the hole to complete the
equation. Notice that SolidWorks assigns a value “D2@Sketch2” = “D1@Sketch2”. D1
was the first diameter assigned to Sketch2 and D2 was the second.
Click the check mark.
Notice that SolidWorks adds the ∑ symbol to the distance from the edge to indicate that
the value is calculated by an equation.
Repeat for the other hole.
If a design change requires a screw of a different size and the diameter of the hole also
changes, the distance from the hole to the edge will change as well.Step 59: Add a second hole at the bottom-right corner.
We will link the diameter to the diameter of the previous hole.
Double-click the diameter of the first hole.
Select Link Value.
Type the name CornerHole.Figure 8. 2 – Corner Holes