This tutorial is our own walk-through of the instructions given in this document : http://www.scribd.com/doc/6793563/Blocks-to-Assembly . We have taken screenshots at a number of steps which might (hopefully) give you a better idea of SolidWorks than the original document.
As you must have guessed from the last tutorial, SolidWorks can be used as a great tool before undertaking a project for mechanical design purposes. Did you know that you can even conduct a stress analysis on a model or the analysis of an assembly in motion using this software?
In this second part of the SolidWorks series we will highlight some important tools in SolidWorks which can come in handy for engineering design purposes and are generally not present in other modelling packages.
This tutorial includes the following parts:
With blocks, you can quickly develop conceptual models of mechanisms or linkages. These models ultimately include several parts that pivot, slide, or rotate. The benefit of modelling mechanisms with layout sketches is the speed and flexibility with which designers can experiment with design variations.
Here we take up a Four Bar Linkage.
As you drag the pointer, the line length updates dynamically.
You have created a block. Note that:Block1-1 is displayed in the FeatureManager design tree under Sketch1.
This completes the block that we set out to create i.e. the four bar mechanism that you are left with.
1. Assembly Motion
SolidWorks can be used to animate an assembly, which is useful when analysing the motion of a working machine. Let us try and animate a simple four bar mechanism.
To add a motor to an animation:
COSMOSXpress offers an easy-to-use first pass stress analysis tool for SolidWorks users. COSMOSXpress can help you reduce cost and time-to-market by testing your designs on the computer instead of expensive and time-consuming field tests.
This exercise uses a simple hook model to introduce you to the following topics:
This allows you to use the original file again.Click COSMOSXpress analysis wizard or click Tools, COSMOSXpress.
On the Welcome tab, you set the default system of units for COSMOSXpress. You can also set a folder for storing analysis results.
To set the analysis options:
The Options screen appears.
A check mark appears on the Welcome tab, and the Material tab appears.In this step, you assign a material to the part from the SolidWorks material library. The hook is made of Alloy Steel.
To assign Alloy Steel to the part:
COSMOSXpress assigns Alloy Steel to the part and the text "current material: Alloy Steel" appears in the screen. Notice also that a check mark appears on the Material tab.
The Restraint tab appears.On the Restraint tab, you enter information on how the part is supported.
To fix the face of the hole:
Face<1> appears in the selection box and the restraint symbols appear on the selected face.
FixedHole appears in the restraint box and a check mark appears on the Restraint tab.
The Load tab appears.Now you apply a 3000 lbs downward force.
To apply the force:
Face<1> and Face<2> appear in the selection box.
Plane2 appears in the Select a reference plane box. Note that the force direction is upward.
The force direction is reversed.
DownwardForce appears in the force set box and a check mark appears on the Load tab.
The Analyze tab appears.To analyze the part:
The analysis begins and a progress indicator appears.
A check mark appears on the Analyze tab and the Results tab appears.The first screen of the Results tab lists the minimum factor of safety of the model approximately as 7.6 which means that the model is not expected to fail under the specified loads and restraints.
Based on the linear static assumption of stress analysis, we can calculate the maximum force as follows:
To change the element size and reanalyze the part:
The Element size updates to 5.3705 and the Element tolerance updates to 0.26853.
Note that exclamation marks appear on the Analyze and the Results tabs.
When the analysis is complete, the Results tab appears.
The new factor of safety is 7.7, which is about 2% difference from the original 7.6. This small difference indicates that the previous results are accurateThis step plots the equivalent (or von Mises) stress distribution in the part.
To view stresses:
COSMOSXpress generates the equivalent stress plot.
Note that annotations for maximum and minimum von Mises stress appear by default on the plot. Note also that a yield strength marker appears at the bottom of the plot legend.
The Save As dialog box appears. Type a name for the animation file and click Save.
A list of the available results appears.In this step, you plot the resultant displacement of the model.
To view resultant displacement:
COSMOSXpress generates the resultant displacement plot.
You can animate and save the animation of the resultant displacement plot as you did for the equivalent stress plot.
A list of the available results appears.To generate an HTML report:
The report generates and displays in your default web browser.
A message box appears to ask if you want to save the COSMOSXpress data.
The Learning Point > An Introduction to Computer Graphics and Solid Modelling tools - SolidWorks, 3DS Max, Google Sketchup, OpenGL >