Whiffleball Tutorium

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This page is a translated version of the page Whiffle Ball tutorial and the translation is 40% complete.
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Base ExampleCommandModel.png Tutorial

Thema
Produktgestaltung
Niveau
Anfänger
Zeit zum Abschluss
30 min
Autor
r-frank und vocx
FreeCAD version
0.17 und höher
Beispieldatei(en)
WhiffleBall_Tutorial_FCWiki.FCStd


Einführung

Dieses Tutorium wurde ursprünglich von Roland Frank (†2017, r-frank) verfasst, und es wurde von vocx neu geschrieben und illustriert.

Dieses Tutorium soll dir vermitteln, wie man die Part Arbeitsbereich benutzt.

Der Part Arbeitsbereich war der erste entwickelte Arbeitsbereich. Sie liefert die grundlegenden geometrischen Elemente, die als Bausteine für andere Arbeitsbereiche verwendet werden können. Der Part Arbeitsbereich ist für die Verwendung in einem herkömmlichen Konstruktiven Festkörpergeometrie (CSG) Arbeitsablauf gedacht. Für einen moderneren Arbeitsablauf mit Skizzen, Blöcken und Formelementen verwende den PartDesign Arbeitsbereich.

Du wirst üben:

  • Einfügen von Grundelementen (Primitiven)
  • sich ändernde Parameter dieser Grundelementobjekte
  • Ändern ihrer Positionierung
  • Ausführen Boolesche Operationen

10 T03 Part ball fillet.png

Endgültiges Modell des Wiffleballs

Einrichtung

1. Öffne FreeCAD, erstelle ein neues leeres Dokument mit Datei → Std New.svg Neu, und wechsle zum Part Arbeitsbereich.

1.1. Drücke die Std ViewIsometric.svg Isometrische Ansicht Schaltfläche oder drücke 0 auf dem Ziffernblock deiner Tastatur, um die Ansicht auf isometrisch zu ändern und die 3D Volumenkörper besser zu visualisieren.
1.2. Drücke die Std ViewFitAll.svg Ansicht alles einpassen Schaltfläche wann immer du Objekte zum Schwenken und Zoomen der 3D Ansicht hinzufügst, so dass alle Elemente in der Ansicht zu sehen sind.
1.3. Halte Strg gedrückt, währen du klickst, um mehrere Elemente auszuwählen. Wenn du etwas falsch ausgewählt hast oder die Auswahl aufheben möchtest, klicke einfach auf eine leere Stelle in der 3D Ansicht.

Einfügen von Grundelementwürfeln

2. Füge einen Grundelementwürfel ein, indem du auf Part Box.svg Kasten klickst.

2.1. Wähle Würfel in der Baumansicht.
2.2. Ändere die Abmessungen im Daten reiter des Eigenschaftseditors.
2.3. Ändere Länge in 90 mm.
2.4. Ändere Breite in 90 mm.
2.5. Ändere Höhe in 90 mm.

3. Im Daten reiter des Eigenschaftseditors, klicke auf den Positionierung Wert damit die elliptische Taste ... zur rechten erscheint.

3.1. Drücke auf die Ellipse um den Positionierungs dialog zu starten.
3.2. Ändere die Übersetzungs Werte.
3.3. Ändere X auf -45 mm.
3.4. Ändere Y auf -45 mm.
3.5. Ändere Z auf -45 mm.
3.6. Drücke die OK Schaltfläche um den Dialog zu schließen.

4. Wiederhole den Vorgang und füge einen zweiten, kleineren Würfel ein, indem du auf Part Box.svg Kasten klickst.

4.1. Der zweite Würfel wird mit dem gleichen Namen, aber mit einer zusätzlichen Nummer zur Unterscheidung des Objekts erstellt.
4.2. :4.2. Wähle Cube001 in der Baumansicht, und ändere die Abmessungen und die Positionierung wie beim vorherigen Objekt.
4.3. Ändere Länge auf 80 mm.
4.4. Ändere Breite auf 80 mm.
4.5. Ändere Höhe auf 80 mm.
4.6. Öffne den Positionierungs dialog.
4.7. Ändere X auf -40 mm.
4.8. Ändere Y auf -40 mm.
4.9. Ändere Z auf -40 mm.
4.10. Drücke die OK Schaltfläche um den Dialog zu schließen.

Ändern der visuellen Eigenschaften

5. The previous operations create a smaller cube inside a bigger cube. To visualize this, we can modify the View properties in the property editor.

5.1. Select Cube001, the smaller cube, in the tree view, and change the color. In the View tab, click on the Shape Color value to open the Select color dialog, then choose a green color; also change the value of Line Width to 2.0.
5.2. Select Cube, the larger cube, in the tree view, and change the transparency. In the View tab, change the value of Transparency to 70.

01 T03 Part cubes visibility.png

Solid cube inside another solid cube

Einfügen von Grundelementzylindern

6. Insert a primitive cylinder by clicking on Part Cylinder.svg Cylinder.

6.1. Select Cylinder in the tree view.
6.2. Change the dimensions in the Data tab of the property editor.
6.3. Change Radius to 27.5 mm.
6.4. Change Height to 120 mm.
6.5. Open the Placement dialog.
6.6. Change Z to -60 mm.
6.7. Press the OK button to close the dialog.

7. Repeat the process, inserting a second cylinder by clicking on Part Cylinder.svg Cylinder.

7.1. The second cylinder will be created with the same name, but with an additional number to distinguish the object.
7.2. Select Cylinder001 in the tree view, and change the dimensions and placement like with the previous object.
7.3. Change Radius to 27.5 mm.
7.4. Change Height to 120 mm.
7.5. Open the Placement dialog.
7.6. Change Y to 60 mm.
7.7. Change the Rotation to Rotation axis with angle; Axis to X, and Angle to 90 deg.
7.8. Press the OK button to close the dialog.

8. Insert another cylinder. This time create a duplicate so that the radius and height don't have to be changed, only its placement.

8.1. Select Cylinder001 in the tree view, and go to the menu Edit → Duplicate selection. This will create Cylinder002.
8.2. Open the Placement dialog.
8.3. Change X to -60 mm.
8.4. Change the Rotation to Rotation axis with angle; Axis to Y, and Angle to 90 deg.
8.5. Press the OK button to close the dialog.

Ändern der visuellen Eigenschaften

9. The previous operations create three cylinders that intersect with each other, and also intersect the cubes. To visualize this better we can modify the View properties in the property editor.

9.1. Select Cube001, the smaller cube, in the tree view, and change the transparency. In the View tab, change the value of Transparency to 70.
9.2. Select Cylinder, in the View tab, click on the Shape Color value to open the Select color dialog, then choose a red color.
9.3. Select Cylinder001, in the View tab, click on the Shape Color value to open the Select color dialog, then choose a blue color.
9.4. Select Cylinder002, in the View tab, click on the Shape Color value to open the Select color dialog, then choose a pink color.
9.5. Select the three cylinders, in the View tab also change the value of Line Width to 2.0.

02 T03 Part cylinders visibility.png

Solid cylinders that intersect themselves and the solid cubes.

Verschmelzen und Schneiden

10. In the tree view, select Cube001 (the inner, smaller cube), and the tree cylinders, then press Part Fuse.svg Fuse. This will create a Fusion object.

11. Then perform a boolean cut of the Cube (larger cube) and the new Fusion object.

11.1. In the tree view select Cube first, and then Fusion.
11.2. Then press Part Cut.svg Cut. This will create a Cut object.
Note: the order in which you select the objects is important for the cut operation. The base object is selected first, and the subtracting object comes at the end.
11.3. If the colors look strange, select the new Cut object, go to the View tab, click on the Shape Color value to open the Select color dialog, then choose a gray color; also change the value of Line Width to 2.0.

03 T03 Part cube cut.png

Hohle Form, hergestellt durch Schneiden eines Würfels und dreier Zylinder aus einem größeren Würfel.

Einfügen von Grundelementwürfeln, um die Ecken des Teilkörpers zu schneiden

Now we'll create more cubes that will be used as cutting tools to trim the corners of the previously obtained Cut object.

12. Click on Part Box.svg Box.

12.1. Select Cube002 in the tree view, and change the dimensions and placement.
12.2. Change Length to 140 mm.
12.3. Change Width to 112 mm.
12.4. Change Height to 112 mm.
12.5. Open the Placement dialog.
12.6. Change X to -70 mm.
12.7. Change Y to -56 mm.
12.8. Change Z to -56 mm.
12.9. Press OK.

13. Click on Part Box.svg Box.

13.1. Select Cube003 in the tree view, and change the dimensions and placement.
13.2. Change Length to 180 mm.
13.3. Change Width to 180 mm.
13.4. Change Height to 180 mm.
13.5. Open the Placement dialog.
13.6. Change X to -90 mm.
13.7. Change Y to -90 mm.
13.8. Change Z to -90 mm.
13.9. Press OK.

We'll duplicate the previous two objects again to use once more as cutting objects.

14. Select only Cube002 in the tree view, and go to Edit → Duplicate selection. This will create Cube004.

15. Select only Cube003 in the tree view, and go to Edit → Duplicate selection. This will create Cube005.

16. To visualize this better we can modify the View properties in the property editor.

16.1. Select the Cut object, in the View tab, click on the Shape Color value to open the Select color dialog, then choose a blue color.
16.2. Select all new cubes, Cube002, Cube003, Cube004, and Cube005, in the View tab, change the value of Transparency to 80.

04 T03 Part cube additional.png

Additional external cubes that will be used as cutting objects for the internal solid.

Schneiden der Ecken 1

17. In the tree view select Cube002 and Cube003.

17.1. Open the Placement dialog.
17.2. Tick the option Apply incremental changes; notice that all Translation values are reset to zeroes.
17.3. Change the Rotation to Rotation axis with angle; Axis to X, and Angle to 45 deg, then click on Apply. This will apply a rotation around the X-axis, and will reset the Angle field to zero.
17.4. Change the Rotation again, now Axis to Z, and Angle to 45 deg, then click on Apply. This will apply a rotation around the local Z-axis, and will reset the Angle field to zero.
17.5. Click on OK to close the dialog.

18. In the tree view de-select the objects; then select Cube003 first, the bigger cube, and then Cube002, the smaller cube.

18.1. Then press Part Cut.svg Cut. This will create Cut001. This is a hollowed body which intersects the initial Cut only at certain corners.

19. To visualize this better we can modify the View properties in the property editor.

19.1. Select Cube004 and Cube005, in the View tab, then change the value of Visibility to false, or press Space in the keyboard.
19.2. Select Cut001, click on the Shape Color value to open the Select color dialog, then choose a red color; also change the value of Transparency to 90.

05 T03 Part cube additional cut 1.png

A rotated, hollowed solid, which will be used as a cutting object for some corners of the internal solid.

Schneiden der Ecken 2

20. In the tree view select Cut001, in the View tab, change the value of Visibility to false, or press Space in the keyboard.

21. In the tree view select Cube004 and Cube005, in the View tab, change the value of Visibility to true, or press Space in the keyboard.

21.1. Open the Placement dialog.
21.2. Tick the option Apply incremental changes; notice that all Translation values are reset to zeroes.
21.3. Change the Rotation to Rotation axis with angle; Axis to X, and Angle to 45 deg, then click on Apply. This will apply a rotation around the X-axis, and will reset the Angle field to zero.
21.4. Change the Rotation again, now Axis to Z, and Angle to -45 deg, then click on Apply. This will apply a rotation around the local Z-axis, and will reset the Angle field to zero.
21.5. Click on OK to close the dialog.

22. In the tree view de-select the objects; then select Cube005 first, the bigger cube, and then Cube004, the smaller cube.

22.1. Then press Part Cut.svg Cut. This will create Cut002. This is a hollowed body which intersects the initial Cut only at certain corners.

23. To visualize this better we can modify the View properties in the property editor.

23.1. Select Cut002, click on the Shape Color value to open the Select color dialog, then choose a pink color; also change the value of Transparency to 90.

06 T03 Part cube additional cut 2.png

Wenn alles gut lief, sollte das Modell wie folgt aussehen:

Fertigstellung des Modells

24. Make sure all objects are visible. In the tree view select all objects, in the View tab, change the value of Visibility to true, or press Space in the keyboard.

07 T03 Part ball additional both.png

The internal hollowed solid, together with the external objects which will be used to cut it.

25. In the tree view de-select the objects; then select Cut first, and then Cut001.

25.1. Then press Part Cut.svg Cut. This will create Cut003.

08 T03 Part ball cut 1.png

The internal hollowed solid, cut by Cut001.

26. In the tree view de-select the objects; then select Cut003 first, and then Cut002.

26.1. Then press Part Cut.svg Cut. This will create Cut004. This is the final object.
26.2. Select Cut004, click on the Shape Color value to open the Select color dialog, then choose a green color; also change the value of Line Width to 2.0.

09 T03 Part ball cut 2.png

The internal hollowed solid, cut by Cut001 and Cut002. Final model.

27. Real objects don't have perfectly sharp edges or corners, so applying a fillet to the edges can be done to refine the model.

27.1. In the tree view, select Cut004 then press Part Fillet.svg Fillet.
27.2. In the Fillet edges task panel go to Selection, choose Select edges, and then press All. As Fillet type choose Constant radius, then set Radius to 1 mm.
24.3. Press OK. This will create a Fillet object.
27.4. In the View tab, change the value of Line Width to 2.0.

10 T03 Part ball fillet.png

Final whiffle ball model with fillets applied to the edges.


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