چگونه در كتيا مونتاژ كنيم ؟http://catiaa.blogfa.com/spacer.gifMechanical Design > Assembly Design
To assemble the piston and the piston pin, select the
Coincidence Constraint http://1.bp.blogspot.com/_JbxDGzIA7b...Ys/s320/10.jpg. Then select the outer surface of the piston ring and the inner surface of the piston hole. An axis should pop-up on each cylindrical profile you are selecting that will guide you to select the correct profile.
http://1.bp.blogspot.com/_JbxDGzIA7b...ZM/s320/13.jpgAfter the Coincidence Constraint had been established, you should notice the
Update Button http://4.bp.blogspot.com/_JbxDGzIA7b...so/s320/11.jpg is active and the constraints on the parts are in dark color. After you pressed the
Update Button, the constrained parts should automatically moved to follow their constraints. Then you should see that the
Update Button is not active anymore and the constraints are in green color indicating that the parts are in their constrained positions.
http://4.bp.blogspot.com/_JbxDGzIA7b...PE/s320/12.jpg
Now to make the piston pin exactly in the correct position, we have to insert another constraint between the piston pin and the piston. Select the
Coincidence Constraint and select surface
1 and
2 as shown in the figure below.
http://4.bp.blogspot.com/_JbxDGzIA7b...cY/s320/17.jpg
When using the
Contact Constraint http://4.bp.blogspot.com/_JbxDGzIA7b...Pg/s320/18.jpg, you should know which surface to be involved. After each constraint, try using the
Manipulation Function with the "With respect to constraints" checked just to make sure the assemblies and constraints are correct. If the parts are moving just like you intended to, it means that the assemblies are correct. If not, try revise your assemblies. Try to remove the
Fix constraint on a part and apply it to other part. Then use the
Manipulation Function to check how the parts move.