ME-546 Computer Aided Manufacturing

Lesson 3 -- Clip Flange with Holes

 

Pro/ENGINEER Functions:

Part            Hole
Retrieve        Pattern

 

Design Objective

This lesson explains how you can create new features on the flange created in Lesson 2 by adding through-holes, as shown in Figure II.3-1.

 

Modeling Strategy

I. Retrieve the flange from the Pro/ENGINEER database. If the flange is still on the screen from lesson two, you can skip to section II.

II. Create a datum plane for the generation of hole features

III. Create the pattern of holes in the flange's base.

III. Create the pin holes through the flange's cylindrical surface.

 

Detailed Construction

I. Retrieve the flange from the Pro/ENGINEER database.

• MAIN - Mode - Part - Search/Retr
  - Choose flange from the submenu by clicking on the filename.

II. Create a datum plane for the generation of hole features.

1. Choose Feature - Create - Datum - Plane - Through
2. Pick the face of Plane A in Figure II 3.2

III.. Create a hole feature in the flange's base to be used as a pattern .

1. First, define the hole feature:
1. PART - Feature - Create - Solid - Hole - Straight - Done - Radial - Done
   This mean that the holes' positions will be defined in polar coordinates, radially outward from the flange axis.
2. Click on the point in datum plane DTM4 where the hole will appear. You may need to spin the model to select the location accurately.
3. Choose centerline A-1 as the first reference and Plane B in Figure II 3.2 as the second.
4. For Angle Enter [ 37.5 ]
   This is the angular position of the hole as measured about the flange axis from face B.
5. Diameter - Done
6. For (pattern circle) Diameter Enter [650 ]
   This is the diameter of the hole pattern circle.
7. One Side - Done - Thru_All - Done
   A Thru_All hole passes through the entire thickness of the part, even if that thickness is changed later.
   - Done
8. - Enter diameter [ 80 ] for the hole diameter.
9. The first hole should appear.
2. Next, define the pattern from this first hole:
1. Part - Feat- Pattern -
2. Select - Pick
3. Choose the hole you just created
4. Identical - Done
5. Select the angular dimension value labeled 37.5.
   In this pattern, the radial distance remains constant and the angular position is incremented.
6. Enter [ 75 ]
   This is the increment between the holes in the pattern.
7. - Done
8. - Enter [ 4 ]
   This is the total number of holes in the pattern, including the first hole.
9. - Done

III. Create the pin hole through the flange's cylindrical surface.

1. FEAT - Create - Solid - Hole - Straight - Done
2. Choose DTM2
3. Pick point in plane where hole is to be placed
4. Okay
5. Choose DTM3 as a reference for Dimensioning
6. Enter [50] for the distance from the hole centerline to DTM3
7. Choose DTM1 as a reference for Dimensioning
8. Enter [0] for the distance of the hole centerline to DTM1
   The hole must go all the way through the flange's cylindrical surface; that is, it must go through both sides.
9. Both Sides - Done - Thru_All - Done - Thru_All - Done
10. Enter [ 60 ] for the hole diameter.

NOTE: If the hole appears below planar face A instead of above, modify the hole's parameters using the modify option on the PART menu. Make the new value "-50" to reverse the direction of the reference dimension, then regenerate the model.

Create a 30 unit diameter hole through the part; one that is at an angle equidistant from all three axes.

Lesson 3 is now complete. Save your part before exiting this Pro/ENGINEER session.