Page 583 - Subyek Computer Aided Design - [David Planchard] Engineering Design with SOLIDWORKS

Engineering Design with SOLIDWORKS® 2018 Top-Down and Sheet Metal Parts

, ,/

-;Q~ Sketchl is fully defined and is displayed in black. Insert a

~1~ 1~1$ 1~1 >
Collinear relation between the top lines of the two inside

rectangles if required. v·

~ BOX (Default<Display State-1 >

• ~I History

Close and rename the sketch. ~ Sensors

• IA I Annotations
65) Right-click Exit Sketch G1 .

Lf::I Equations

dJ Front Plane

66) Rename Sketch1 to Layout. dJ Top Plane

dJ Right Plane

l. Origin
Save the BOX assembly.

C Layout

67) Click Save (ii. ®@ Mates '

What happens when the size of the MOTHERBOARD changes? How do you ensure that

the BOX maintains the required 20mm spatial gap between the internal components and

the BOX boundary? How do you design for future revisions? Answer: Through Global

Variables and equations.

Global Variables and Equations

In previous versions of SOLIDWORKS, linked or shared values were used to link two or

more dimensions without using equations or relations. Changing any one of the linked

values would change the other to which it was linked. Existing linked values are still

supported, but you cannot create new linked values in SOLIDWORKS 2012 and later.

Instead, use Global Variables for the same purpose as linked values. Global Variables are

much easier to find, change and manage than linked values.

To use a Global Variable to link dimensions: 1.) Create a Global Variable in the

Equations dialog box or the Modify dialog box for dimensions, and 2.) Set two or more

dimensions equal to the Global Variable.

The project goal is to create three boxes of different sizes. Ensure that the models remain

valid when dimensions change for various internal components. This is key for proper

design intent. Apply Global Variables and equations.

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