3rd Test

Objective

The advanced level Test 3 consists of modeling a complex part that will be validated by achieving the appropriate mass.

Material specifications:

Material: 1060 Alloy Aluminum
Density: 2700 Kg/m³

Summary

This part was mainly created using the following features:

Extruded boss
Extruded cut

Mass Table

Configuration	Mass (g)
(a) A = 193 mm; B = 88 mm; W = B/2 mm; X = A/4 mm; Y = B+5.5 mm; Z = B+15mm	1400.64
(b) A = 205 mm; B = 100mm; W = B/2 mm; X = A/4 mm; Y =B+5.5 mm; Z = B+15 mm	1651.39
(c) A = 210 mm; B = 105 mm; W = B/2 mm; X = A/4 mm; Y = B+5.5 mm; Z = B+15mm	1760.41

Video

Files available for download

Download the modeling files by clicking by following these links :

Part Creation Process

Step 1: Initial Sketch

On the front plane, draw the following view while respecting the dimensions and angles.

Step 2: Base Extrusion

Use the extruded boss feature and extrude the selected region by 96.5 mm using the mid-plane option.

Step 3: Trapezoid Shape

On the top plane, make the following sketch with a 6 mm offset to get the trapezoid shape.

Step 4: Through Extrusion

Make a through all extruded boss.

Step 5: Material Removal Series

Proceed with a series of extruded cuts.

Step 6: First Cut

Make a through all extruded cut from the sketch.

Step 7: Bilateral Cuts

Using the first initial sketch, make an extruded cut on both sides of the region, leaving a 5 mm gap between them. Each cut is made with a 2.5 mm offset.

Step 8: Intermediate Result

After this operation, we obtain an intermediate part form.

Step 9: Additional Material Removal

Continue with material removals for the region of sketch 1 (the first sketch).

Step 10: Mid-plane Boss

Still using the first sketch, create a 5 mm extruded boss with the mid-plane option.

Step 11: Final Features

By making an extruded boss from the sketch on the top plane and extruded cuts for the 10 mm holes, we obtain the penultimate part.

Step 12: Final Part

Apply the material and the desired display mode. This gives us the final Test 3 part.

Variable Dimension System

Step 13: Global Variables Setup

For this test, dimensions A, B, Z, Y, X, W must be modified to obtain a new part with a different mass each time. To achieve this:

Use the equation tool
Add global variables
Each time we modify these global variables, the dimensions are adjusted automatically
This generates a new part configuration

Step 14: Variable Linking Methods

When dimensioning to use variables:

Method 1: Use "=" which allows selection of the variable in question

Method 2: Link the dimension already placed on the drawing to the global variable already created

Step 15: Multiple Configurations

At the end of this series of variable modification operations, we obtain 3 different pieces of different masses. The masses of the pieces are designated as configurations a, b, and c.

(a) A = 193 mm; B = 88 mm; W = B/2 mm; X = A/4 mm; Y = B+5.5 mm; Z = B+15mm;

The part mass is : 1400.64 gramms

(b) A = 205 mm; B = 100mm; W = B/2 mm; X = A/4 mm; Y =B+5.5 mm; Z = B+15 mm;

The part mass is : 1651.39 gramms

(c) A = 210 mm; B = 105 mm; W = B/2 mm; X = A/4 mm; Y = B+5.5 mm; Z = B+15mm;

The part mass is : 1760.41 gramms

Alternative Perspectives

Multiple paths allow for creating the same part. The part in this test can also be created using the following alternative method:

Alternative Method A

On the top plane, create the following sketch and make an extruded boss of "B" mm.

Alternative Method B

On the front plane, make the following sketch and proceed to remove extruded material to obtain the part.

Alternative Method C

Use global variables or dimension directly on the sketches to have the three requested parts with the desired dimension specifications.

Note: This document references multiple technical drawings and sketches that guide the 3D modeling process. The parametric approach using global variables allows for efficient generation of multiple part variants.