Robot Welding
This example will show you how to use the RoboDK plugin for SolidWorks. This example includes a table and 2 angle irons to show you how you can use RoboDK’s feature to improve your welding paths.
With the RoboDK plug-in for SolidWorks,you can easily program an industrial robot for welding.This example includes a table and 2 angle irons to show you how you can use RoboDK to improve your welding paths.
To go through this robot welding project, you should first select the RoboDK robot welding example in the default library. Then you should select the welding paths/sketches in SolidWorks. Then you should adjust the robot path in RoboDK.
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 selectAuto 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, clickWeld1 Settings这将打开Curve Follow Project.
5.ClickUpdateto generate the program and thenSimulate.
In this section you will learn how to improve or customize the order of motion for each welding curve. The welding gun is following the path as it is supposed to. However, we can see that the orientation is a bit off, and we can see that the path is far from optimal.
First, you should fix the path itself:
1.In theCurve Follow Project, click onSelect Curve(going from 1 to 2, then 3 to 4, 5 to 6, 7 to 8, and 9 to 10).
2.The order from the welding sections makes sense. However, the welding direction does not seem to make sense.
3.To switch the direction of a welding path (such as path 3 to 4), right click the path and selectReverse direction– you can see that the arrows of that path changed direction.
4.You can do the same for path 5 to 6 and path 7 to 8.
5.Once your modifications are done, you can selectDoneon the right window.
6.ClickUpdateto generate the program andSimulateto start the simulation.
Now that the order of the paths seems to make more sense, you can adjust the orientation of the tool along the path to better improve the robot motion.
7.In theCurve Follow Projectmenu, click onShow preferred tool path. A variety of ghost tools will appear to show you the orientation of the tool for different positions along the path.
8.The first tool orientation option that you can try is thePath to tool offsetaround the “Z” axis. To do so, you can manually enter in a value or bring your mouse over it and use the scroll wheel to bring your value up or down.
9.By doing this, you can see the orientation of the ghost tool changing.
In this case, the basic option does not seem to fix our problem. Fortunately, you can have more options to work with; you can reveal them by clicking theblue plus buttonand change them according to your project.
10.You can change the rotation around the Z axis (rotz) to its original value, zero, and then click on the “+Z” button.
11.As you can see with the ghost tools, the robot flange will always be on top of the part. ClickUpdateand thenSimulateto simulate the result.
12.If you use the scroll bar, the new tool orientation facilitates the cable management of the tool; it has no risk of interfering with the robot.
Approach and retract movements are especially important to avoid collisions between the tool and the part. TheCurve Follow Project自动创建一个方法和一个收回every welding path. By default, these movements are 100 mm long and are normal to the welding path.
To avoid any collisions, you can modify them to be 200 mm long and keep the same orientation.
Alternatively, you can add an additional approach movement along the Z axis of the coordinate system:
1.Put back the default normal approach of 100 mm.
2.Add a movement, for example, alongZ.
3.Set it to 50 mm.
4.PressUpdateandSimulateonce you are finished.
5.Now the robot retracts normal to the welding path and then straight up.
