You should first import the part and the welding paths from SolidWorks.
Import the project from SolidWorks:
1.Go to the RoboDK tab in SolidWorks and select Auto Setup.
2.Select the welding paths. Make sure to also select the faces as they help orient the robot tool.
3.Now that you have imported the path from SolidWorks, you can go to RoboDK.
4.In the station tree, click Weld1 Settings which will open the Curve Follow Project.
5.Click Update to generate the program and then Simulate.