Constraining with Mate and Flush in Inventor

Assembly constraints remove degrees of freedom between two selected components. The Mate constraint aligns planes, lines and points, while the Flush constraint just aligns planes.

Constraining with Mate and Flush in Inventor

Click Constrain to open the Place Constraint dialog. Notice that the Assembly tab is active and there are four types of assembly constraints.
On the ribbon, Assemble tab, Relationships panel, click Constrain to open the Place Constraint dialog box. Notice that there are four types of Assembly constraints. This exercise focuses on the Mate type.

The Assembly tab is active and Mate is the default type of constraint. The Solution is set to Mate, and the Selection 1 button is active. Note the red arrows on the selection buttons, which indicate that a selection needs to be made.

The first mate constraint is between P1V Block:2 and P1-Base Slide:1. You need to constrain the bottom face of P1V Block:2 to the top face of P1-Base Slide:1. To do so, in the window, click the bottom face of P1V Block:2. Notice that an arrow in the direction of the surface normal appears at the point of selection. In the dialog, the Selection tool 2 becomes active automatically and the arrow for Selection 1 is now dimmed.

Constraining with Mate and Flush in Inventor

When you select the bottom of the part, notice that an arrow appears pointing in the direction of the surface normal. In the window, move the cursor over the faces of the other components. Notice that a surface normal arrow appears. The solution of a mate plane to mate plane constraint is for the surface normals to be in opposite directions and the faces separated at a specified gap or offset distance.

Think of it like a book on a table and the surface normals as forces. The top of the table is pushing up on the book while the bottom face of the book and being pulled down by gravity. The book is being held down because the two forces are acting opposite one another.

Click the top face of P1-Base Slide:1, and upon selection of the second face, notice how the V Block moves to the Base. If you have speakers, you hear a popping noise. Both of these actions are a preview that the constraint is solvable. Also notice that the part aligns to the two points that you selected.

Join us next week for defining the Offset value field.

Leave a Reply

Your email address will not be published.

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>