Thicken surface to solid in Solidworks - Dashboard Guide

Dashboard Mode - Thicken surface to solid

Goal

Understand how to convert a surface model into a solid by thickening it in SolidWorks, and analyze the impact on volume and surface area.

Sample Data: Surface and Thickened Solid Properties

Model	Surface Area (cm²)	Thickness (cm)	Volume (cm³)
Original Surface	150	0	0
Thickened Solid	180	0.5	75

Dashboard Components

• KPI Card: Original Surface Area
  Shows the surface area of the original surface model.
  Value: 150 cm²
• KPI Card: Thickness Applied
  Shows the thickness value used to thicken the surface.
  Value: 0.5 cm
• KPI Card: Resulting Solid Volume
  Shows the volume of the solid after thickening.
  Value: 75 cm³
• Bar Chart: Surface Area Comparison
  X-axis: Model (Original Surface, Thickened Solid)
  Y-axis: Surface Area (cm²)
  Bars: 150 and 180 cm² respectively
• Bar Chart: Volume Comparison
  X-axis: Model (Original Surface, Thickened Solid)
  Y-axis: Volume (cm³)
  Bars: 0 and 75 cm³ respectively

Dashboard Layout

+----------------------+----------------------+  
| Original Surface Area | Thickness Applied    |  
|      (KPI Card)      |      (KPI Card)      |  
+----------------------+----------------------+  
+---------------------------------------------+  
|          Surface Area Comparison (Bar Chart) |  
+---------------------------------------------+  
+---------------------------------------------+  
|             Resulting Solid Volume (Bar Chart)|  
+---------------------------------------------+  

Interactivity

A thickness slider allows users to adjust the thickness value from 0 to 1 cm.

Changing the thickness updates the Thickness Applied KPI card, the Resulting Solid Volume KPI card, and both bar charts dynamically.

This helps users see how volume and surface area change as thickness varies.

Self Check

If you set the thickness filter to 0.8 cm, what is the new volume shown in the Resulting Solid Volume KPI card?

Answer: Volume = Surface Area x Thickness = 150 cm² x 0.8 cm = 120 cm³

Key Result

Dashboard shows how thickening a surface in SolidWorks changes volume and surface area.

Practice

1. What does the Thicken feature do in SolidWorks when applied to a surface?

easy

A. It adds thickness to the surface, converting it into a solid body.

B. It removes the surface from the model.

C. It changes the color of the surface without affecting geometry.

D. It splits the surface into multiple smaller surfaces.

Solution

1. Step 1: Understand the purpose of the Thicken feature

   The Thicken feature is used to add thickness to a surface, which by itself has no volume.

2. Step 2: Effect of adding thickness

   By adding thickness, the surface becomes a solid body with volume, enabling further solid modeling operations.

3. Final Answer:

   It adds thickness to the surface, converting it into a solid body. -> Option A

4. Quick Check:

   Thicken converts surface to solid [OK]

Hint: Thicken means add thickness to make a solid [OK]

Common Mistakes:

• Thinking Thicken only changes color
• Assuming Thicken removes surfaces
• Confusing Thicken with splitting surfaces

2. Which of the following is the correct way to specify thickness in the Thicken feature dialog in SolidWorks?

easy

A. Thickness value is ignored; thickness is fixed.

B. Enter a negative value to thicken outward, positive to thicken inward.

C. Thickness value must always be zero.

D. Enter a positive value to thicken outward, negative to thicken inward.

Solution

1. Step 1: Understand thickness direction

   Positive thickness grows the surface outward, increasing size; negative thickness grows inward, reducing size.

2. Step 2: Confirm correct sign usage

   Entering positive values thickens outward; negative values thicken inward, as per SolidWorks convention.

3. Final Answer:

   Enter a positive value to thicken outward, negative to thicken inward. -> Option D

4. Quick Check:

   Positive = outward, negative = inward thickness [OK]

Hint: Positive thickness grows outward, negative inward [OK]

Common Mistakes:

• Reversing positive and negative thickness meaning
• Entering zero thickness expecting change
• Ignoring thickness sign causing errors

3. Given a flat square surface of 10mm by 10mm, if you apply a Thicken feature with thickness 2mm outward, what will be the volume of the resulting solid?

medium

A. 20 cubic millimeters

B. 200 cubic millimeters

C. 100 cubic millimeters

D. 400 cubic millimeters

Solution

1. Step 1: Calculate base area of the surface

   The surface is 10mm by 10mm, so area = 10 * 10 = 100 mm².

2. Step 2: Calculate volume by multiplying area by thickness

   Thickness is 2mm outward, so volume = 100 mm² * 2 mm = 200 mm³.

3. Final Answer:

   200 cubic millimeters -> Option B

4. Quick Check:

   Area * thickness = volume = 200 mm³ [OK]

Hint: Volume = surface area x thickness [OK]

Common Mistakes:

• Using thickness as 0.2 instead of 2
• Calculating area incorrectly
• Confusing volume with surface area

4. You applied a Thicken feature with thickness -3mm on a curved surface, but the feature failed. What is the most likely cause?

medium

A. Negative thickness caused the solid to self-intersect or collapse.

B. Thickness value must be positive only.

C. Surface must be flat to thicken.

D. Thicken feature does not work on curved surfaces.

Solution

1. Step 1: Understand negative thickness effect

   Negative thickness grows inward, which can cause geometry to overlap or collapse if thickness is too large.

2. Step 2: Identify failure reason

   The failure is likely due to self-intersecting geometry caused by inward thickening beyond surface limits.

3. Final Answer:

   Negative thickness caused the solid to self-intersect or collapse. -> Option A

4. Quick Check:

   Negative thickness can cause geometry errors [OK]

Hint: Check for self-intersection when using negative thickness [OK]

Common Mistakes:

• Assuming thickness must be positive only
• Believing curved surfaces cannot be thickened
• Ignoring preview errors before confirming

5. You have a complex surface model with multiple open edges. You want to create a solid by thickening it 1.5mm outward. What should you do to ensure the Thicken feature works correctly?

hard

A. Use negative thickness to avoid errors with open edges.

B. Apply Thicken directly; open edges do not affect solid creation.

C. Close all open edges or use surface knitting before applying Thicken.

D. Convert the surface to mesh before thickening.

Solution

1. Step 1: Recognize importance of closed surfaces

   Thicken requires a closed or knitted surface to create a valid solid without gaps.

2. Step 2: Prepare the surface model

   Close open edges by patching or knitting surfaces to form a watertight model before thickening.

3. Step 3: Apply Thicken feature

   Once the surface is closed, apply 1.5mm outward thickness to create a solid successfully.

4. Final Answer:

   Close all open edges or use surface knitting before applying Thicken. -> Option C

5. Quick Check:

   Closed surfaces needed for thickening [OK]

Hint: Close open edges before thickening surfaces [OK]

Common Mistakes:

• Trying to thicken open surfaces directly
• Using negative thickness to fix open edges
• Ignoring surface preparation steps