FreeCAD Memo - Training

Modeling Training for Beginner - Step 2

Updated : April 26, 2016
Version 0.16

Creating a retainer

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Smartphone Case

  1. Creating a sketch plane

    Workbench_PartDesignSwitch workbench to Part Design workbench.

    Sketcher_NewSketchSelect a top face of the case and create a new sketch plane.
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  2. Extracting construction lines

    Sketcher_External Extracting construction lines for reference : Construction lines can be extract from existing solid with External Geometry tool. Select the tool and a edge of a solid.
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    After extracting construction lines, select the solid from part tree and hide the solid with space bar.
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  3. Outer profile line

    Sketcher_CreateRectangle Sketcher_CreateFilletCreate a rectangle and round corners of the rectangle.
    Constraint_PointOnPointSelect points on the rectangle and construction lines. Constrain them with Coincident tool.
    Constraint_PointOnPointSelect the corner centers of the rectangle and construction lines. Constrain them with Coincident tool (Select and constrain each center of 4 corners).
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  4. Inner profile line

    Sketcher_CreateRectangle Sketcher_CreateFilletCreate a rectangle and round corners of the rectangle.
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    Constraint_PointOnPointSelect a center of the upper-left corner and constrain it with Coincident tool.
    Constraint_HorizontalDistanceSelect end point of the upper-left corner and a point on the construction lines. Constraint them with Horizontal Distance tool. Set distance to 2.2 mm.
    Constraint_PointOnPointConstarin other centers of the corner (upper-right, lower-right and lower-left corners) with Coincident tool.
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  5. Exiting sketch edit

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    Click Close on tasks tab to exit sketch edit.
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  6. Extruding

    PartDesign_Pad Extrude the sketch in reverse direction. : The extruding length is 1.0 mm
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Creating cutouts

We create cutouts so that the case does not block connectors or buttons on the side.
iphone-side
Kelvinsong http://commons.wikimedia.org/wiki/File:IPhone_5S_volume_buttons.png
iphone-bottom
Kelvinsong http://commons.wikimedia.org/wiki/File:IPhone_5S_bottom.png
  1. Creating a sketch plane

    Sketcher_NewSketchSelect a top face of the case and create a new sketch plane.
    cutout1 cutout2
  2. Extracting construction lines

    Sketcher_External Extracting construction lines for reference : Construction lines can be extract from existing solid with External Geometry tool. Select the tool and a edge of a solid.
    cutout3

    After extracting construction lines, select the solid from part tree and hide the solid with space bar.
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  3. Rough sketches

    Sketcher_CreateRectangleCreate rectangles at position of the cutouts. The positions do not need to be precisely.
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  4. Setting sizes

    Constraint_HorizontalDistance Constraint_VerticalDistanceConstraint sizes and position of the rectangles with Horizontal Distance tool and Vertical Distance. The poosition can be determine with the construction lines.
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    cutout6-top Upper rectangle
    cutout6-left Left rectangle
    cutout6-bottom Lower rectangle
  5. Creating a shape

    PartDesign_PocketCreating cutouts : Select the sketch and Pocket tool. Cut case with length 7.5 mm.
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