Exercises

青华模具培训

Exercise– Creating a User-Defined Feature (UDF) with Knowledge Fusion Rules

For this tutorial, we will use Knowledge Fusion rules to drive a UDF.  We will also use Knowledge Fusion to customize a UDF menu.

Step 1

Create UDF part file.

1. Create a new part file, using File—>New, and name it udf_rule.prt.

2. Choose MB3—>Orient View—>Trimetric in the graphics window, setting the trimetric view the object being developed.

3. Choose Application—>Modeling.

Step 2

Create a spline for reference surface

4. Choose Insert—>Curve—>Spline—>Through Points.

5. Leave the default values for the spline creation and select OK

6. Select Point constructor and enter in the following points:

       Point1        X =   8

Y =   -2

Z =  14

Point2  X =   8

Y =   1

Z =  11

Point3  X =   8

Y =   3

Z =   7

Point4  X =   8

Y =   0

Z =   0

Step 3

Create reference surface.

7. Choose Insert—> Form Feature—>Extrude

  8. Pick the spline for the section string

9. Select Direction and Distance

10. Accept the default direction

11. Enter in –10 for the Start Distance and 10 for the End Distance and choose OK to create the surface.

Step 4

Name the Face.  Knowledge Fusion can reference native Unigraphics geometry by name.  By naming the face, we will be able to reference this face in Knowledge Fusion without having to adopt it in.

12. Choose Format—>Attribute—>Name—>Assign

13. Select Type—>Face in the class selection menu

14. Select the face and choose OK

15. Enter in front for the name

16. Select OK for the Max. Value

a.       To view the name, Select Preferences—>Visualization—>Names/Borders

b.      Turn on View of Definition

Step 5

Create Knowledge Fusion Rules

17. Display the Knowledge Fusion Navigator

·         Choose View—> Knowledge Fusion Navigator

18. Create the following Knowledge Fusion attributes under root using Add Attribute in the Knowledge Fusion Navigator:

Table 1 – Input and Men Parameters

Name	Type	Formula
RotationAngle	Number	0
ProjectionVector	Vector	vector(0,-1,0)
Origin	Point	point(4,7,7)
FaceName	string	"front"
RotationAngle_label	String	"Angle"
ProjectionVector_label	String	"Vector"
Origin_label	String	"Origin"
FaceName_label	String	"Face Name"
input_parameters	List	{RotationAngle,ProjectionVector,Origin,FaceName}

NOTE: Make all of the attributes listed in Table 2  uncached.  This is needed to ensure that the plane updates when the surface geometry is modified.  To make an attribute uncached, select the uncached toggle at the bottom of the Add Attribute menu.

Table 2 - Rules

Name	Type	Formula
FaceSelection	list	UG_refObjectByName(facename:, {ug_face}, "");
LocatorOnSurface	list	ug_face_askPointParametersAtPoint(first(FaceSelection,Origin:,projection_vector,projectionvector;
PointOnFace	Point	ug_face_askPointOnFace(first(FaceSelection,LocatorOnSurface;
FaceNormal	Vector	ug_face_askNormal(first(FaceSelection,LocatorOnSurface;
x	Vector	RotateVector(vector(-1,0,0); RotationAngle:; FaceNormal;
y	Vector	RotateVector(x:; -90; FaceNormal;

NOTE: To create a menu item, a string attribute with the name of the attribute followed by “_label” is needed.  This attribute will set the name label shown in the UDF menu.  The “input_parameters” list attribute defines the UI objects (fields) that will be displayed in the menu.  For example, to create the menu shown in Figure 1, the following attributes are needed (Do not create the following attributes in your exercise, they are just an example):

Table 3 – Menu Example

Name	Type	Formula
Name	Name	MyName
Name_label	String	“Name:”
Input_parameters	List	{Name}

。。。

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