Why Revolved boss/base in Solidworks? - Purpose & Use Cases

The Big Idea

What if you could create complex 3D shapes by just spinning a simple 2D sketch?

The Scenario

Imagine trying to create a 3D shape by manually drawing every curve and surface on each side, then connecting them piece by piece. It's like sculpting a vase by hand without any tools, just guessing the shape as you go.

The Problem

This manual method is slow and full of mistakes. You might spend hours redrawing curves, and if you want to change the shape, you have to redo everything. It's easy to lose track of dimensions and end up with a shape that doesn't fit your needs.

The Solution

The Revolved boss/base feature lets you draw a simple 2D profile and spin it around an axis to create a perfect 3D shape instantly. It saves time, reduces errors, and makes changing the design as easy as editing the original sketch.

Before vs After

✗ Before

Draw front curve
Draw side curve
Manually connect surfaces
Adjust dimensions repeatedly

✓ After

Sketch 2D profile
Select axis
Use Revolved boss/base to spin profile
Edit sketch to update shape

What It Enables

It enables quick creation of smooth, symmetrical 3D parts from simple 2D sketches, making design faster and more flexible.

Real Life Example

Designing a bottle shape for a product: instead of modeling every curve, you sketch the bottle's outline and revolve it to get a perfect, smooth bottle body instantly.

Key Takeaways

Manual 3D modeling of revolved shapes is slow and error-prone.

Revolved boss/base spins a 2D sketch to create 3D parts quickly.

It makes design changes easy and saves a lot of time.

Practice

1.

What is the main purpose of the Revolved Boss/Base feature in SolidWorks?

easy

A. To measure distances between parts

B. To cut holes in a 3D model

C. To add colors to a 3D model

D. To create 3D shapes by spinning a 2D sketch around an axis

Solution

1. Step 1: Understand the Revolved Boss/Base function

   This feature creates 3D shapes by revolving a 2D sketch around a chosen axis.

2. Step 2: Compare options to the function

   Only To create 3D shapes by spinning a 2D sketch around an axis describes spinning a 2D sketch to form a 3D shape, matching the feature's purpose.

3. Final Answer:

   To create 3D shapes by spinning a 2D sketch around an axis -> Option D

4. Quick Check:

   Revolved Boss/Base = 3D shape by revolving sketch [OK]

Hint: Remember: revolve means spin a sketch around an axis [OK]

Common Mistakes:

• Confusing revolve with cut or color features
• Thinking it measures distances
• Assuming it creates flat sketches

2.

Which of the following is the correct syntax to start a Revolved Boss/Base feature in SolidWorks?

1. Select sketch
2. Choose Revolved Boss/Base
3. Select axis of revolution
4. Set angle

easy

A. Select sketch, choose Revolved Boss/Base, select axis, set angle

B. Select axis, choose Revolved Boss/Base, select sketch, set angle

C. Choose Revolved Boss/Base, select angle, select sketch, select axis

D. Set angle, select sketch, choose Revolved Boss/Base, select axis

Solution

1. Step 1: Identify the correct order of operations

   You must first select the 2D sketch, then start the Revolved Boss/Base feature, then pick the axis, and finally set the angle.

2. Step 2: Match the steps to options

   Only Select sketch, choose Revolved Boss/Base, select axis, set angle follows this logical and correct sequence.

3. Final Answer:

   Select sketch, choose Revolved Boss/Base, select axis, set angle -> Option A

4. Quick Check:

   Correct order = sketch -> feature -> axis -> angle [OK]

Hint: Always pick sketch before axis in revolve setup [OK]

Common Mistakes:

• Selecting axis before sketch
• Setting angle before choosing feature
• Skipping axis selection

3.

Given a semicircle sketch revolved 180 degrees around its diameter axis using Revolved Boss/Base, what 3D shape is created?

medium

A. A half sphere

B. A cylinder

C. A full sphere

D. A cone

Solution

1. Step 1: Understand the sketch and revolution angle

   A semicircle revolved 180 degrees around its diameter axis will create half of a sphere shape.

2. Step 2: Match shape to revolution

   Revolving 180 degrees (half circle) of a semicircle forms a half sphere, not a full sphere or cylinder.

3. Final Answer:

   A half sphere -> Option A

4. Quick Check:

   Semicircle + 180° revolve = half sphere [OK]

Hint: Half circle revolved 180° makes half sphere [OK]

Common Mistakes:

• Assuming 180° revolve makes full sphere
• Confusing semicircle with rectangle
• Thinking it creates a cylinder

4.

Identify the error in this Revolved Boss/Base setup:
1. Sketch is a closed profile
2. Axis selected is a line outside the sketch plane
3. Revolution angle set to 360 degrees
What is the likely problem?

medium

A. Sketch must be open, not closed

B. Angle cannot be 360 degrees

C. Axis must lie in the sketch plane or intersect it

D. Axis line must be parallel to sketch plane

Solution

1. Step 1: Check axis position relative to sketch

   The axis must be in or intersect the sketch plane to revolve the profile correctly.

2. Step 2: Analyze given axis outside sketch plane

   An axis outside the sketch plane will cause errors or no valid revolution.

3. Final Answer:

   Axis must lie in the sketch plane or intersect it -> Option C

4. Quick Check:

   Axis position error = axis must intersect sketch plane [OK]

Hint: Axis must cross or be in sketch plane for revolve [OK]

Common Mistakes:

• Thinking sketch must be open
• Believing 360° angle is invalid
• Assuming axis must be parallel to sketch plane

5.

You want to create a vase shape by revolving a profile sketch around an axis. The profile is open on one side. What must you do to successfully use Revolved Boss/Base?

hard

A. Select multiple axes for revolution

B. Close the profile sketch before revolving

C. Set the revolution angle to less than 180 degrees

D. Use Revolved Cut instead of Boss/Base

Solution

1. Step 1: Understand profile requirements for revolve

   The profile must be a closed sketch to create a solid 3D shape with Revolved Boss/Base.

2. Step 2: Fix open profile issue

   Closing the profile ensures the revolve creates a solid vase shape without errors.

3. Final Answer:

   Close the profile sketch before revolving -> Option B

4. Quick Check:

   Closed profile needed for solid revolve [OK]

Hint: Always close your sketch profile before revolve [OK]

Common Mistakes:

• Trying to revolve open profiles
• Using Revolved Cut instead of Boss/Base incorrectly
• Thinking multiple axes can be selected