Solidworks - Tutorial - 08 - Bearing Puller, Notas de estudo de Engenharia de Materiais

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SolidWorks

Tutorial 8

Bearing Puller

Preparatory Vocational Training

and Advanced Vocational Training

To be used with SolidWorks ®^ Educational Edition Release 2008-

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SolidWorks Benelux developed this tutorial for self-training with the SolidWorks 3D CAD program. Any other use of this tutorial or parts of it is prohibited. For questions, please contact SolidWorks Benelux. Contact informa- tion is printed on the last page of this tutorial.

Initiative: Kees Kloosterboer (SolidWorks Benelux) Educational Advisor: Jack van den Broek (Vakcollege Dr. Knippenberg) Realization: Arnoud Breedveld (PAZ Computerworks)

1 Start SolidWorks and open a new part.

2 Select the Front Plane and make a sketch like in the illustration on the right. The sketch consists of four lines and three dimensions.

Make sure the left bottom corner of the sketch is at the origin.

3 1. Click on Arc in the CommandManager.

2. Click on Tangent Arc in the PropertyManager.
3. Click on the right end of the upper horizontal line.
4. Put the end of the arc at about the same loca- tion as in the drawing. The exact spot is not relevant at this point.
5. Push the key to end the line command.

4 Set dimensions for the arc you have just drawn:

1. Click on ‘Smart Dimen- sion’ in the Command- Manager.
2. Click on the arc.
3. Set the dimension.
4. Change the radius of the arc to ‘85’.
5. Click on OK.

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5 Make a curved edge be- tween the arc and the ver- tical line.

1. Click on Sketch Fillet in the CommandManager.
2. Change the radius to ‘5mm’ in the Property- Manager.
3. Click on the arc, to the left of the vertical line.
4. Click on the vertical line, just below the arc.
5. Click on OK.

6 Click on ‘Features’ in the CommandManager and next on ‘Revolved Boss/Base’.

7 Next, you have to set the rotation axis:

1. Click on the left vertical line in the sketch.
2. Make sure the rotation angle in the Property- Manager is set to ‘ degrees’ (a complete circle).
3. Click on OK.

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10 Round of the corners be- tween the two lines.

1. Click on Sketch Fillet in the CommandManager.
2. Check to make sure that the radius is still 5mm (you set this in step 6 already, and it should have remained in SolidWorks).
3. Click on the corners of both copied lines
4. Click on OK.

11 Next, we will make con- struction lines from the first two lines we have drawn.

1. Select the first line.
2. Hold the key on your keyboard and se- lect the second line.
3. Check the option ‘For construction’ in the PropertyManager. The two lines will now be displayed as centerlines.

Tip! We have also used centerlines in other tutorials. These lines are actually auxiliary lines. When you use a sketch to make an extrusion, for example, SolidWorks only uses the ‘real’ lines and not the auxiliary lines. In step 13 you have seen that you can easily change a ‘real line’ (or circle of arc) into an auxiliary line and vice versa. For this the option, the ‘For con- struction’ box in the PropertyManager must be checked.

12 Next, we will cut a corner from the model:

1. Click on ‘Features’ in the CommandManager.
2. Click on ‘Extruded Cut’.

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13 You can see a small arrow In the model that indicates from which side of the sketch the material will be removed.

1. Make sure these arrows point outwards. Click on it when you need to change the direction.
2. Click on OK.

Tip! In most cases you will use a closed sketch for an ‘Extruded Cut’. In the case of a circle or a square you will only make a hole in the shape of that sketch. In the last step, we used an open sketch to make an ‘Extruded Cut’. It is handled in the same way except for two differences:

1. An ‘Extruded Cut’ with an open sketch will always go through the entire depth of the model (‘Through all’). You cannot set a depth.
2. SolidWorks needs to know from which side the material has to be cut away. You must pay attention to the little arrow, which indicates the cutting side. By the way, you can also change this direction in a closed sketch and cut away the material from the inside or outside of the sketch boundaries.

14 For the next features we need an auxiliary line that runs through the middle of the model. This axis con- sists in the model already but is not visible with the standard (default) settings.

1. Click on the Hide/Show Items icon.
2. Make sure the button View Temporary Axes is set.

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17 We will now make a sketch on the lower surface of the model. Rotate the model so you can see the bottom plane of the part.

1. Click on the surface to select it.
2. Click on Normal To in the menu that appears.

18 Draw a Centerline.

1. Put the first point right on the origin.
2. Set a second point at a random distance direct- ly below the origin.

19 Draw a circle and a line at the locations indicated on the right. The midpoint of the circle must be on top of the cen- terline.

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20 Make a mirrored image of this line at the other side of the centerline.

1. Select the centerline (hold the -key).
2. Click on ‘Mirror Entities’ in the CommandMa- nager.

21 Now, set the three dimen- sions you see in the illu- stration on the right. Do this using Smart Dimension and change the values.

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25 You must pay attention to which direction the material is removed from because the sketch is not entirely closed.

1. Make sure the little ar- row that sets the direc- tion is pointing inward.
2. Click on OK.

26 Next, we have to make some holes.

1. Select the plane as in- dicated in the illustra- tion.
2. Click on ‘Sketch’ in the CommandManager.
3. Click on Circle.

27 Rotate the model with Normal To, and draw two circles at random positions like in the drawing on the right.

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28 Use Smart Dimension to set four dimensions in the sketch, and change their values as indicated on the right. Push the key to close the Smart Dimension command.

29 Next, set the circles to the same size:

1. Select one of the cir- cles.
2. Hold the key and select the other circle.
3. Click on ‘Equal’ in the PropertyManager.

30 Next, set the circles to the same height:

1. Select the midpoint of one of the circles.
2. Hold the key and select the midpoint of the other circle.
3. Click on ‘Horizontal’ in the PropertyManager.

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33 1. Set the number of cop- ies in the PropertyMa- nager to ‘3’.

2. Click on OK.

34 Finally, we have to make the metric thread in the hole: Click on ‘Hole Wizard’ in the CommandManager.

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35 Set the following features in the PropertyManager:

1. The ‘Hole Type’ is Tap.
2. The ‘Size’ is ‘M12’. Check the other settings to make sure they concur with the illustration on the right.
3. When everything is set properly, click on ‘Posi- tions’ to place the hole.

36 Set the hole on the top plane of the bridge at a random position. Actually, you are setting a point now, which will de- termine the position of the hole. The point is on the plane, but unfortunately it is not possible to put this point in the midpoint of the plane. To do this, we conduct an additional step.

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39 The model is now ready. Save it as: bridge.SLDPRT. First, create a new folder, so you can keep all files to- gether.

40 We would like to have more information about this model. What does is weigh? Where is the center of gravity? Is it strong enough? To be able to answer these kinds of questions, we must first determine the kind of material to use to make the part.

1. Right-click on ‘Material’ in the FeatureManager.
2. Select ‘Edit Material’ in the menu.

41 1. Open the main group ‘Steel’ by clicking on the ‘+’ symbol.

2. Select ‘Alloy Steel’ as the desired material.
3. Click on OK.

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42 We can evaluate the data now.

1. Click on the tab ‘Eva- luate’ in the Com- mandManager.
2. Click on ‘Mass Proper- ties’.

43 A menu appears, in which you can read the data, in- cluding:

1. The weight of the part.
2. The volume.
3. The total surface of the part. This could be im- portant when a part has to be painted.
4. The coordinates of the point of gravity. This is also displayed as a coordinate.
5. When you have fi- nished reading the da- ta, click on Close to close the window.

44 Next we want to know if the part is strong enough for our purpose. We want to be able to pull 600kg (=6000N). To find out if our part is strong enough for this, we will use COS- MOSXpress. Click on the ‘COS- MOSXpress Analysis Wizard’ in the CommandManager.

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