THE DEVELOPMENT OF THE POTENTIAL AND ACADEMIC PROGRAMMES OF WROCŁAW UNIVERsITY OF TECHNOLOGY

Mining and Power Engineering

Janusz Skrzypacz

CAD/CATIA

CAD/ CATIA

LECTURE 6

Part Transformation Features (4h)

MIRROR function

MIRROR function is one of the duplication feature available in CATIA. The main aim of this option is generating a mirror reflection of the selected part relative to selected plane (fig.1). This function can be found in Transformation Features group located at the "Insert" top menu or at the Toolbar .

Application of the MIRROR function consists of three steps: selection 3D operations that will be base of mirror (it is recommended to select operations on tree), run MIRROR, selection of reflection plane (which will be symmetry of the model).

Fig. 1 Working of MIRROR function

PATTERN Functions

PATTERN function is one of the duplication feature available in CATIA. There are two versions of PATTERN: RECTANGULAR PATTERN and CIRCULAR PATTERN The main aim of these options is generating duplication of the selected 3D operation. These functions can be found in Transformation Features group located at the "Insert" top menu or at the Toolbar   .

Use the following steps to create a rectangular pattern (fig.2):

1 Select the RECTANGULAR PATTERN icon.

2. Select the 3D feature to be patterned (this step can be first).

3. Select the Parameters type from the pull-down menu.

4. Define the First Direction of the pattern (number elements in one row).

5. Select Second Direction of the pattern (number rows).

6. Push OK

Fig. 2 Definition of rectangular pattern

Use the following steps to create a circular pattern (fig.3):

1.       Select the 3D feature to be patterned (this step can be second).

2.       Select the CIRCULAR PATTERN icon.

3.       Select the Parameters type from the pull-down menu.

4.       Click inside the Reference element field and select the direction reference.

5.       Specify the number of instances and angular spacing

6.       Push OK

Remarks:

·         Circular patterns are radial and defined about an axis. The axis reference can be defined by an edge, a line, or a normal vector off a planar surface or datum plane.

·         The Crown Definition tab allows the feature(s) to be patterned  in a radial direction as well as around an axis. There are three Parameters options to define the crown.

Fig. 3 Definition of circular pattern

SHELL function

The SHELL function allows to create a shell element from solid element with control of every wall of solid one. This functions can be found in Dress-Up Features group located at the "Insert" top menu or at the Toolbar .

Result

Fig. 4 Working of the SHELL function

EXERCISES

Exercise 1

According to the drawing presented below create a Part by using SHAFT, HOLE, CIRCULAR PATTERN, EDGE FILLET, CHAMFER function and save the Part.

Fig. 5 The drawing for the exercise 1

Exercise 2

According to the drawing presented below create a Part by using SHAFT, POCKET, CIRCULAR PATTERN, EDGE FILLET, CHAMFER function and save the Part.

Hint: Use CIRCULAR PATTERN with option "Instance(s) & unequal angular spacing".

Fig. 6 The drawing for the exercise 2

Exercise 3

According to the drawing presented below create a Part by using SHAFT, MIRROR POCKET, CIRCULAR PATTERN, GROOVE EDGE FILLET, CHAMFER function and save the Part. Hint - notice that the shaft has the two axis of symmetry - use this fact.

Fig. 7 The drawing for the exercise 3

The teeth make according to sketch below.

Exercise 4

According to the drawing presented below create a Part by using PAD, SHELL, HOLE,  EDGE FILLET function and save the Part.

Fig. 8The drawing for the exercise 4

Project co-financed by European Union within European Social Fund