8. Cylindrical parts

In this tutorial we are going to learn to work with another type of solid pieces, the cylinders.


  1. Open the FreeCAD application and click on the icon to create a new document icono-nuevo-documento.

    We select the Part workbench to start designing objects in 3 dimensions.


  2. At this point we are going to add the reference axes to help us place the pieces correctly.

    In the menu View... Activate or deactivate the cross of the axes.

    _images/freecad-axis-cross.png


  3. Now we create a cylinder by clicking the second icon on the solid object bar.

    _images/freecad-barra-solidos.png

    We select to see the piece in isometric view.

    _images/freecad-vista-isometrica.png

    The piece will look like the following image.

    _images/freecad-p08-imagen01.png


  4. We are going to create a Pac-Man character from two cylinders.

    First we must modify the size of the cylinder, in the data tab, according to the following dimensions.

    Radius (Radius): 20mm

    Height (Height): 5mm

    Angle (Angle): 270º

    With what our cylinder will have changed as in the following image.

    _images/freecad-p08-imagen02.png


  5. We will now create a new cylinder and move it (Data Tab... Placement... Position...) to the new position.

    x = 5

    y = 10

    z=0

    With what the pieces will be as in the figure.

    _images/freecad-p08-imagen03.png


  6. In this new position we select the first cylinder, Cylinder, hold down the Control key and select the second cylinder Cylinder001.

    We select the part cutting operation.

    _images/freecad-diferencia-piezas.png

    As a result we will obtain, in plan view, the following figure.

    _images/freecad-p08-imagen04.png


  7. To finish we will change the color of the figure to yellow in the View tab.

    _images/freecad-p08-imagen05.png

    and we will rotate the figure 45º about the z axis in the Data tab.

    _images/freecad-p08-imagen06.png

    To get the following figure.

    _images/freecad-p08-imagen07.png



Exercises

  1. Open FreeCAD and create a brick like the one in the figure from a cube and 6 cylinders.

    _images/freecad-p08-ejercicio01.png

    The size of the cylinders will be the default size.

    The size of the cube will be as follows.

    Length (Length) = 20

    Width = 14

    Height (Height) = 10


  2. Create a cheese holder and a cheese like the ones in the figure.

    _images/freecad-p08-ejercicio02.png

    The cheese holder has an outer radius of 40mm and an inner radius of 36mm. The total height will be 12mm with a gap of 10mm in height. It is built with a difference of two cylinders. The inner cylinder must be moved upwards 2mm so that it does not go through the outer cylinder and the ground can be seen.

    The cheese has a radius of 35mm and an angle of 58º so that a total of 6 cheeses can fit in the cheese holder.



Video-tutorial

Vídeo: cilindros y pacman.