Конструирование деталей из листового материалаSheet Metal Design презентация

Упражнения

Version 5 Release 9 June 2002
EDU-CAT-E-SMD-FX-V5R9

стенок - Walls, Profile, Edge and Extrude
Гибы и фланцы - Bends; Auto/Regular and Flange and Hem
Вырезы, штамповки и их размножение - Cut Outs, Pattern, use Flat Mode and 3D Features
Построение развертки - Create 2D Flat Pattern drawing
Модификации - Standard Bend Radii, Wall sizes, Cut Outs, Flanges and Features
Конструирование в контексте сборки

wall is a profile
3. The Bends are common throughout the part
4. Some Flanges are used in the part
5. Some walls are equal in length and can be extruded from a profile
6. Holes whether they are round or a specific profile are done with wall cuts
7. Specialty features such as extruded hole and strengthening ribs are used
8. All walls, bends and features can be modified
9. A 2D flattened view can be created for the part

Описание тестового примера

edge and extruded from sketch

3. Add Auto Bends and Hem Bends

4. Add Wallcuts and Stamp Features and Pattern them

Bracket design process...

5. Create 2D Flat Views on Drawings

6. Modify Walls and Bend Radius

Процесс конструирования тестового примера

Parameters for the Control Bracket

for control bracket:
. Use 1 mm for thickness, 1 mm for Bend Radius and Square Relief

the Control Bracket

walls

Left wall

Bottom wall

Define the walls of the Control Bracket:
. Back walls: 9 mm length
. Right walls to be 8 mm length

Flanges


Defining the Bends and Flanges of the Control Bracket

bends and flanges for control bracket:
. Use standard Bend Radii except where indicated
. Use 1 mm radius, and 5 mm length and 90 degree angle for the front Flange
. Use 0.5 mm radius and 7 mm length for the Hem Bend

2mm and create bend on wall indicated on back of part

2- Select the Automatic Bend icon and create bends for other walls.

3- Select the Flange icon and then the 3 front edges indicated. Key in 1 mm radius, 5 mm length and 90 degree angle.

4- Select the Hem icon and the edge indicated. Key in 0.5 radius and 7 mm length

Do It Yourself (2/2)

Patterning them and adding Stamp Features



Defining Cut Outs, Patterning them and adding Stamp Features to the Control Bracket

Cut Outs, Patterns and Features for control bracket:
. Use sketches where provide for cut outs
. Holes to be 2 mm diameter on 4 mm horizontal spacing and 3 mm vertical spacing
. Cut out in the flat to be centered and be 4 mm from edge of part and be 10 mm long by 2 mm wide
. Stiffening Rib located in center of center flange with R1 and R2 equal to 1 mm and angle equal to 80 degrees and 10 mm long
. Extruded hole to be 3 mm diameter, 4 mm deep with a 0.5 mm Radius and 85 degree angle, centered in wall

Center Flange

Edge to locate flat
cut out from

to Next

2- Select Sketch.15 create a more complex cut out using Up to Next

3- Pattern hole created in step 1 with 5 instances, 4 mm apart horizontal and 2 instances 3 mm apart vertical

4- Go to Flatten mode and create rectangular cut out 2 mm wide by 10 mm long 4 mm from main body of part, wall indicated above. Re-fold part.

5- Create Stiffener Rib in center of Back center flange. R1 and R2 should be 1 mm radius, the angel should be 80 degrees and the length should be 10 mm

6- Create an extruded hole with a 3 mm diameter 4 mm deep with 0.5 radii.

Do It Yourself (2/2)

2D Flattened View of the Control Bracket

a 2D Flattened View for control bracket:

Select this Reference plane

the Unfolded View icon

2- Select the reference plane indicated above.

3- Now click anywhere on the drawing to create the 2D Flattened View.

4- Add some dimensions

Select this Reference plane

Do It Yourself (2/2)

part, Wall Size, Bend Radii, Flange size, Cut Outs, and Stamp Features

the following list of items as indicated:
. Modify the general bend radius to .5 mm
. Modify the Flange height and Hem Bend to 3 mm
. Modify the back left wall to 5 mm wide
. Modify the back right wall with corner cut out 3 mm by 5 mm
. Change the length of the tab to be 1 mm shorter then it currently is and add 2 mm by 45 degrees chamfers on the end.
. Change saw tooth cut out in bottom to be 7 mm wide and to have 0.25 mm radius on corner of teeth.

Back Right Wall

Back Left Wall

Tab

to Next

2- Select Sketch.15 create a more complex cut out using Up to Next

3- Pattern hole created in step 1 with 5 instances, 4 mm apart horizontal and 2 instances 3 mm apart vertical

4- Go to Flat mode and create rectangular cut out 2 mm wide by 10 mm long 4 mm from main body of part, wall indicated above. Re-fold part.

5- Create Stiffener Rib in center of Back center flange. R1 and R2 should be 1 mm radius, the angel should be 80 degrees and the length should be 10 mm

6- Create an extruded hole with a 3 mm diameter 4 mm deep with 0.5 radii.

Do It Yourself (2/2)

simple walls in the context of an assembly

be creating the Top Cover in the context of the Assembly
. Create the Top Cover wall using Sketch.1
. Create the back wall extending 7.5 mm downward
. Create two side walls on each side where indicated above 3 mm length

Do It Yourself (1/2)

Load the Catia document ‘CATSMDEXSimple_Wall_start.CATProduct‘

sure material arrow points upward.

2- Select the Wall on Edge icon and then then create the back wall making it 7.5 mm long.

3- Select the inside surface of the side wall and go to the sketcher and sketch the first side wall between the two flanges. Use sketch to create a profile wall extruded inward to the part

4- Select the same surface again and sketch between flange and the back relief on the new cover. Again create a profile wall extruded inward.

5- Repeat the process on the other side of the part.

Do It Yourself (2/2)

Bends to the walls already created and adding some Flanges

and then add a hem bend to the back wall and an S-Bend to the front edge of the cover:
The Hem bend should 5 mm long and a radius of .1 mm on the inside of the back wall.
Use Sketch.7 for the S-Bend (Swept Flange)

Do It Yourself (1/2)

Load the Catia document ‘CATSMDEXBends_start.CATProduct‘

a bend between wall 1 and walls 2 through 6.

2- Select the Hem icon and then the inside edge of the bottom of the back wall and key in .1 mm radius and 5 mm length.

3- Select the Swept Flange icon and then the bottom front edge of the cover for the spine. Select Sketch.7 for the profile.

Do It Yourself (2/2)

stamp features


Adding the mounting holes and a Stamp feature with a hole in it.

holes and then add a Stamp Feature for the raised area in part:
Holes to be 3 mm Diameter
Feature to be 2 mm high with 0.5 mm radii and 45 degree angle.
Center hole in feature to be 10 mm diameter

Do It Yourself (1/2)

Load the Catia document ‘CATSMDEXCutouts_Features_start.CATProduct‘

Hole in each of these 4 flanges

Feature Sketch

part to make new holes concentric with. They will be 3 mm in diameter

2- Select the Feature sketch (Sketch.9) and key in 2 mm for the height, 0.5 mm for the radii and 45 degrees for the angle.

3- Select the surface to the feature and sketch a hole in the center of the feature. The Diameter should be 10 mm.

Hole in each of these 4 flanges

Feature Sketch

Do It Yourself (2/2)