Creating the second component part: the t junction
Now, an intersection composed of two pipe sections will
be created in a separate file and the surfaces will be trimmed. Then this file
will be imported to the original model to create the entire piece.
Creating
one of the pipe sections
- Choose Files
New, thus starting
work in a new file.
- Choose Geometry
Create
Point and enter points (0, 9) and (0, 11). Press ESC to conclude
the creation of points.
- From the Copy window, select Points and Rotation. Enter
an angle of 180 degrees and from the Do extrude menu, select Lines.
The axis of rotation is the x axis. Enter two points defining the axis, one
in First Point and the other in Second Point, for example, (0,
0, 0) and (100, 0, 0). (Figure 22)
- Click Select and select the two points just created.
- Repeat the process, this time entering an angle of -180 degrees, thus creating
the profile of the pipe section with a second rotation of 180 degrees. The
rotation could have been carried out in only one rotation of 360 degrees.
However, in the present example, each circumference must be defined between
two points. (Figure 23)

Figure 22. The result of the first
180-degree rotation

Figure 23. The combined result
of the first rotation and the second rotation of
-180 degrees, thus obtaining the profile of the pipe section
- From the Copy window, choose Lines and Translation.
In First Point and Second Point, enter the points defining the
translation vector. Since the pipe section must measure 40 length units, the
vector is defined by points (0, 0, 0) and (-40, 0, 0).
- From the Do extrude menu, choose the option Surfaces.
- Click Select to select the lines that define the cross-section of
the pipe. Press ESC to conclude the selection process.

Figure 24. Creating a pipe by extruding circumferences