Shell feature for hollow parts in Solidworks - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the Shell feature in SolidWorks?

The Shell feature hollows out a solid part by removing material from the inside, leaving a specified wall thickness.

beginner

How do you specify the wall thickness when using the Shell feature?

You enter the desired wall thickness value in the Shell feature property manager before applying it.

intermediate

What happens if you select faces to remove during the Shell operation?

Selected faces are removed to create openings, allowing the part to be hollowed out through those faces.

intermediate

Can the Shell feature be applied to parts with complex geometry?

Yes, but complex geometry may cause errors or thin walls; careful selection of faces and thickness is important.

beginner

Why is the Shell feature useful in product design?

It reduces material use and weight while maintaining outer shape, useful for cost savings and functional design.

What does the Shell feature do in SolidWorks?

A Splits a part into multiple bodies

B Adds material to thicken a part

C Removes internal material to hollow a part

D Changes the color of a part

The Shell feature hollows out a solid by removing internal material, leaving a specified wall thickness.

How do you create an opening in a shelled part?

A By selecting faces to remove during the Shell operation

B By adding a hole feature after shelling

C By changing the wall thickness to zero

D By using the Fillet tool

Selecting faces to remove during the Shell operation creates openings in the hollowed part.

What might cause errors when using the Shell feature?

A Very thin wall thickness or complex geometry

B Using the wrong color

C Saving the file in the wrong format

D Adding too many fillets

Thin walls or complex shapes can cause shelling errors due to geometry limitations.

Which value do you set to control the thickness of the shell walls?

A Face size

B Wall thickness

C Shell depth

D Material density

Wall thickness defines how thick the hollowed walls will be after shelling.

Why is the Shell feature important in manufacturing?

A It adds surface texture

B It changes the color of parts

C It increases the part size

D It reduces material use and weight

Shelling reduces material and weight, saving cost and improving product performance.

Explain how the Shell feature works and why it is useful in designing hollow parts.

Think about making a solid part hollow while keeping its outer shape.

Describe the steps to apply the Shell feature and create an opening in a part.

Consider how to hollow the part and make holes or openings.

Practice

1.

What is the main purpose of the Shell feature in SolidWorks?

easy

A. To hollow out a solid part by removing internal material

B. To add extra thickness to a solid part

C. To combine two solid parts into one

D. To create a new solid part from a sketch

Solution

1. Step 1: Understand the Shell feature function

   The Shell feature removes internal material from a solid part, leaving a hollow shell with specified wall thickness.

2. Step 2: Compare options with the Shell feature purpose

   Only To hollow out a solid part by removing internal material correctly describes hollowing out a solid part by removing inside material.

3. Final Answer:

   To hollow out a solid part by removing internal material -> Option A

4. Quick Check:

   Shell feature = hollow part creation [OK]

Hint: Shell feature hollows parts by removing inside material [OK]

Common Mistakes:

• Confusing Shell with adding thickness
• Thinking Shell combines parts
• Assuming Shell creates new solids from sketches

2.

Which of the following is the correct way to specify wall thickness when using the Shell feature?

easy

A. Enter the thickness value in the Shell property manager before selecting faces to remove

B. Draw a sketch of the thickness and extrude it

C. Use the Fillet tool to set thickness

D. Apply a material color to indicate thickness

Solution

1. Step 1: Identify how wall thickness is set in Shell feature

   Wall thickness is entered as a numeric value in the Shell property manager before removing faces.

2. Step 2: Eliminate incorrect options

   Options B, C, and D do not relate to setting wall thickness in Shell feature.

3. Final Answer:

   Enter the thickness value in the Shell property manager before selecting faces to remove -> Option A

4. Quick Check:

   Wall thickness input = Enter the thickness value in the Shell property manager before selecting faces to remove [OK]

Hint: Set thickness in Shell property manager before removing faces [OK]

Common Mistakes:

• Trying to set thickness via sketches
• Using unrelated tools like Fillet
• Confusing color with thickness

3.

Given a solid cube of 100mm edge length, you apply a Shell feature with 5mm wall thickness and remove the top face. What is the height of the hollow part after shelling?

medium

A. 90 mm

B. 100 mm

C. 95 mm

D. 85 mm

Solution

1. Step 1: Understand shelling effect on height

   Shell removes 5mm thickness from all internal faces except the removed top face, so height reduces by wall thickness at bottom only.

2. Step 2: Calculate hollow height

   Original height 100mm minus 5mm wall thickness at bottom = 95mm hollow height.

3. Final Answer:

   95 mm -> Option C

4. Quick Check:

   Height after shell = 100 - 5 = 95 mm [OK]

Hint: Subtract wall thickness only where faces remain [OK]

Common Mistakes:

• Subtracting thickness twice
• Ignoring removed face effect
• Assuming hollow height equals original height

4.

You applied a Shell feature with 3mm thickness but the shell did not create a hollow part. What is the most likely reason?

medium

A. The part is already hollow

B. You forgot to select faces to remove

C. The material color is not set

D. The wall thickness is larger than half the smallest part dimension

Solution

1. Step 1: Identify shell failure cause

   If wall thickness is too large (more than half the smallest dimension), shelling cannot hollow the part.

2. Step 2: Check other options

   Not selecting faces or material color does not prevent shelling; part being hollow is unrelated to failure.

3. Final Answer:

   The wall thickness is larger than half the smallest part dimension -> Option D

4. Quick Check:

   Thickness > half dimension causes shell failure [OK]

Hint: Wall thickness must be less than half smallest dimension [OK]

Common Mistakes:

• Ignoring size limits for thickness
• Assuming color affects shell
• Thinking shell needs face removal always

5.

You have a solid cylinder 50mm diameter and 100mm height. You want to create a hollow cylinder with 4mm wall thickness and an open top using the Shell feature. Which steps should you follow?

hard

A. Apply Shell with 4mm thickness without removing any face

B. Apply Shell with 4mm thickness, then select the top face to remove

C. Create a new sketch of a hollow cylinder and extrude it

D. Use Fillet tool to hollow the cylinder

Solution

1. Step 1: Set wall thickness in Shell feature

   Enter 4mm as wall thickness in the Shell property manager.

2. Step 2: Remove the top face to create an opening

   Select the top face of the cylinder to remove it, making the cylinder hollow with an open top.

3. Final Answer:

   Apply Shell with 4mm thickness, then select the top face to remove -> Option B

4. Quick Check:

   Shell + remove top face = hollow open cylinder [OK]

Hint: Remove faces to create openings after setting thickness [OK]

Common Mistakes:

• Not removing the top face for opening
• Using sketches instead of Shell
• Trying to hollow with Fillet tool