Parametric Design of Lever
Modeling of Mechanical Lever using parameters in SolidWorks.
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Step 1: Create a new document
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Step 2: Create a new part file
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Step 3: Options
Open "Options"
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Step 4: Options
Options > FeatureManager > Equations > Show > OK
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Step 5: Define Parameters
Equations > (Right Click) > Manage Equations
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Step 6: Define Parameters
Define the "Length" and "Height" variables as shown in the image. Click OK.
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Step 7: Sketch 1_1
Front Plane > (Right Click) > Sketch
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Step 8: Sketch 1_2
Use the "Circle" feature and create circles as shown in the image.
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Step 9: Sketch 1_3
Select two points as shown in the image and align them horizontally using the "Horizontal" feature.
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Step 10: Sketch 1_4
Use the "Smart Dimension" feature on the top left and create dimensions as shown in the image.
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Step 11: Sketch 1_5
Define the Length dimension as shown in the image. Instead of giving a value, link a dimension to the parameter "Length" by typing '= "Length"'.
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Step 12: Sketch 1_6
Similar to the previous step, define the Height dimension and link it to the parameter.
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Step 13: Sketch 1_8
Create a circle that is tangent to two other circles as shown in the image. To define tangency, select two circles and click on the "Tangent" feature as shown in the image.
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Step 14: Sketch 1_9
Give dimension to the circle. Define diameter as 100 mm.
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Step 15: Sketch 1_10
Similar to the previous two steps, create two new tangent circles and define their dimensions as shown in the image.
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Step 16: Extrude 1_1
On the top left, go to the "features" bar and click on the "Extruded Boss/Base" feature.
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Step 17: Extrude 1_2
Select the areas shown in the image in the "selected contours" area. To select an area, simply drag the cursor to the area in the sketch and click on it.
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Step 18: Extrude 1_3
Extrude 15 mm in both directions.
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Step 19: Extrude 1 - Done
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Step 20: Sketch 2_1
Top Plane > (Right Click) > Sketch
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Step 21: Sketch 2_2
Create a construction center line.
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Step 22: Sketch 2_3
Use the "Line" feature to create a sketch as shown in the image. Make sure to use solid lines and NOT construction lines.
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Step 23: Sketch 2_4
Select the line and point as shown in the image and apply "Coincident".
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Step 24: Sketch 2_5
Create dimensions as shown in the image using the "Smart Dimension" feature.
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Step 25: Sketch 2_6
Use the "Mirror Entities" feature and mirror the sketch about the construction line at the center.
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Step 26: Extrude Cut 1
Go to the "Feature" tab on the top left and select the "Extrude Cut" feature.
Make sure to choose the options as shown in the image.
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Step 27: Fillet 1
Features Tab > Fillet
Choose the edges and options as shown in the image.
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Step 28: Fillet 2
Similar to the previous step, apply a fillet of 2 mm to the highlighted edges in the image.
Click OK and the final model is ready.
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Step 29: Use of Parameters
Equations > (Right Click) > Manage Equations
Change the values of "Length" and "Height" to 110 mm and 20 mm respectively.
Make sure that "Automatic Rebuilt" and "Automatic Solve Order" are selected.
Now, the model with automatically adapt to the changes in values of parameters (variables).
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Step 30: Final Model
