8/12/2019 6rs set

1/3

Pro/ENGINEER Mechanical CAD/CAM

Assisted Exercises 2

1 Sweeps

A sweep is created by defining two sections. The first section is the trajectory andthe second is the cross-section. The trajectory is the path the cross-section is sweptalong. The trajectory is always created as the first step. Then the cross-section iscreated and located with respect to the trajectory. Sweeps can be used as forms forprotrusions, cuts and slots.

The trajectory for a sweep may be sketched open of closed. Choose Done whenfinishing sketching the trajectory. The system then re-orients the viewer so that theentity with the start point indicator is normal to the screen and on the plane of thescreen. Note that the trajectory cannot intersect itself.

Figure 1: Picture frame

EXERCISE 1: Picture frame

Construct a picture frame similar to that shown in figure 1. The general steps are:

1. Create a part namedframeand create three default planes (or use New Part.

2. INSERT sweep Protrusion.

3. Choose Sketch Traj from the SWEEP TRAJ menu.

1

8/12/2019 6rs set

2/3

4. Pick your sketching plane and view direction.

5. NowSketch, a trajectory. Choose appropriate dimensions for a picture frame.

6. When the trajectory is complete, select the tick icon.

The system has now placed you in another sketcher session so you can sketch thecross-section of the sweep.

1. Sketch a cross section similar to that shown in figure 1.

2. When the cross-section is complete, select the tick icon.

3. You can then Preview for the dialog box before clicking OK to complete thefeature.

Extend the object to including a picture plate and use the VIEWColor andAppearance options to give the unit a display finish.

2 Blends

A blended feature consists of a series of at least two planar sections withPro/ENGINEER joins together at their edges with transitional surfaces to form acontinuous feature. Blends can be used as forms for protrusions, cuts or slots.

Parallel blends are created from a single section which contains multiple contourscalled sub-sections. Each segment in each section is matched with a segment in thefollowing section. The blended surfaces are created between the correspondingsegments. Note that in most cases each segment or sub-section must always havethe same number of segments/vertices.

While blending the sections together, Pro/E connects the start point of each sectionand continues to connect the vertices in a clockwise manner. The start point can bechanged for any section.

When creating a parallel blend, all sections are created in the same sketch. SecTools, Togglemust be used to sketch the next section (the inactive sections willthen be displayed in gray). The system will prompt you for the depth betweensub-sections.

EXERCISE 2: TrophyDesign an interesting shaped trophy (more elegant than the ones shown here!) usinga blend as your basic feature. The following instructions describe how to create abasic blend.

2

8/12/2019 6rs set

3/3