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Creating arcs in a sketch

Video: Creating arcs in a sketch

Arcs are segments of a circle and can be created in much the same way.

Creating arcs in a sketch

Arcs are segments of a circle and can be created in much the same way. Arcs do need more information than a circle because you need to define where the beginning and ending points are in addition to the sine location and radius. Let's take a look. Up here on the Sketch toolbar, we can see we have a Arc tool and we've got three different types of arcs we can use. We can use a center point, tangent, or the three point arc. So let's go ahead and start with the center point arc. Now almost pretty simple. Just click where we want the center point to be. In this case I will choose the origin and draw where your radius must basic in to begin that right now.

I'll click OK and then you can define how much of that circle you would actually like to draw. So it is pretty handy to determine a length and go one direction or the other direction and when you halved with the angle. Go ahead and click on the left mouse button to finish that arc segment. Now, if you want to define that a little further, what you can do is use some center lines. Go from the origin to the two end-points. What you can do is you can either define the angle. In this case here I've got a vertical line and a horizontal line. But if you didn't want to use that you could delete the horizontal line, and maybe you could adjust that angle of the arc using that.

In fact, you can even add maybe another. Set our line here, and give it an angle, between the two, maybe 30.0, and now define that size. And then you can give it a radius, we'll say 1.5, and that fully defines that arc in space. Next, is a tangent arc. So tangent arc needs to have some line segment to start from to be tangent two. So in this case here, I have this nice line here. I start right at the end point, and I'll draw out an arc. So notice it sticks to the cursor, and I can drag that around and it gives me both the angle as well as the radius.

And I can actually bring that all the way around and snap to another end point to finish out that arc. Then I can move this other line around if I need too, or I could adjust the arc. If I want to make this arc and this line tangent as well I can click on the arc, hold on Control chose the line and then chose tangent. Now they all work as a team and you got two lines that are tangent to an arc. If I look up here under the 3 Point Arc, 3 Point Arc is great for creating maybe fills between these two circles. So I'll click on one of them, click on the other one, and then I can drag out the arc to look about appropriate.

But notice these are not tangent. So then I can always go back, hold down Ctrl, select the two entities and say, Make Tangent. And do the same thing over here. Make tangent, then I've got two arcs that automatically move around the radius, and I can control the arc between the two circles. A really handy way to do that, and in fact, I can do the same thing down here, and then I can trim away this inside arc to make a different type of shape. A lot of different things we can do to work with these arcs. Here's another example. If I choose the three-point arc again, I can start from one line segment.

I can drop it down to the endpoint of the other. And I can drag out this radius to that circle. Click where you're happy. And then if you have maybe the center point of that circle, if you'd like to maybe make coincident with this point here. I can choose both those points, and I could say, just go ahead and merge those points together. I could do the same thing with the tangent arc. Go back up here to tangent arc, start from this point here, and spring it all the way around to this point here. And it automatically adds a tangency between the two different lines. It's a really handy way to do that. The last thing I want to point out is if you're using the Line command, make a straight line segment and click.

If I go forward and actually make another line, it'll just continue making straight lines. However, one little sneaky trick behind the scenes is if you actually go back on top of the original line. When you come back out, it actually turns it into a tangency arc, it makes a really quick way to design things using straight lines and tangent arc segments. So you can click and then it turns right back into the line tool. Or again, if you go back onto that arc, you come back out, you can, again, make another tangent arc to it. So a really handy way. And keep in mind, if you do that starting with the line, whichever way you come out of that line, you come back on it Then you come back out on a corner, it'll be tangent in that direction.

So make sure you're coming off that endpoint in the direction of tangency you'd like to use. Arcs are helpful for creating smooth-flowing shapes and appealing aesthetics. They're just segments of a circle, and sometimes starting with a circle is a good way to define the lcoation for complex arcs.

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This video is part of

SolidWorks 2014 Essential Training

97 video lessons · 7208 viewers

Author

Expand all | Collapse all
1. Introduction

1m 51s
1. Welcome
1m 7s
2. Using the exercise files
44s
2. 1. Touring the Interface

31m 13s
1. Launching SolidWorks for the first time
3m 55s
2. Accessing and customizing the Ribbon
4m 14s
3. Touring the shortcut bar and identifying essential keys
7m 27s
4. Saving, renaming, and managing files
10m 28s
5. Working with the new view cube, or View Selector
2m 36s
6. New features in SolidWorks 2013 and 2014
2m 33s
3. 2. Getting Started with 3D

14m 11s
1. Understanding the 3D world
2m 31s
2. Creating your first part
3m 15s
3. The virtual, parametric prototyping environment
1m 56s
4. The FeatureManager and feature-based modeling
3m 43s
5. History-based modeling and the rollback bar
2m 46s
4. 3. Basic Solid Modeling

28m 32s
1. Starting a new sketch
6m 50s
2. The six steps used in almost all modeling features
52s
3. The Line and Centerline tools
3m 25s
4. Using the Circle tool
1m 51s
5. Adding and removing relationships and dimensions
6m 56s
6. Understanding relationship types
3m 58s
7. System options, units, and templates
4m 40s
5. 4. More Drawing Tools

18m 28s
1. Drawing rectangles
5m 31s
2. Creating arcs in a sketch
4m 8s
3. Drawing splines in a sketch
4m 57s
4. Sketching polygons
3m 52s
6. 5. Sketch Editing Tools

36m 5s
1. Trimming and extending portions of a sketch
3m 54s
2. Creating offset geometry
3m 13s
3. Moving, copying, rotating, and scaling elements
3m 13s
4. Erasing, undoing, and redoing actions
2m 24s
5. Using the mirror tools
2m 24s
6. Creating repeating patterns in a sketch
4m 55s
7. Using construction lines to build robust sketches
3m 25s
8. Applying fillets and chamfers to a sketch
2m 32s
9. Working with slots
3m 46s
10. Adding text to parts
4m 1s
11. Using the Convert Entities command
2m 18s
7. 6. Reference Geometry

9m 33s
1. Working with planes
5m 28s
2. Placing and using axes
2m 22s
3. Placing a coordinate system
1m 43s
8. 7. Building 3D Geometry

17m 50s
1. Extruding a sketch into a 3D object
4m 36s
2. Using Revolve to create 3D parts
2m 42s
3. Using Loft to create complex shapes
4m 40s
4. Refining a loft shape with guide curves
2m 22s
5. Using the sweep to create wire and pipe shapes
3m 30s
9. 8. Removing Material

20m 23s
1. Modifying parts using the Extruded Cut tool
5m 42s
2. Working with the Revolved Cut tool
6m 19s
3. Using the Lofted Cut tool
3m 32s
4. Cutting holes and grooves with the Swept Cut tool
4m 50s
10. 9. Refining Geometry

21m 5s
1. Using fillets and chamfers to smooth corners
5m 58s
2. Creating repeating rectangular patterns
3m 16s
3. Creating a circular pattern
2m 27s
4. Mirroring objects
4m 0s
5. Using the Shell and Draft tools
3m 52s
6. Scaling parts
1m 32s
11. 10. Blocks

9m 39s
1. Working with reusable sketches and blocks
2m 47s
2. Creating blocks
3m 51s
3. Designing with blocks
3m 1s
12. 11. Assembly: Putting It All Together

29m 45s
1. Understanding the tools for beginning a new assembly
4m 46s
2. The basic steps in creating an assembly
3m 18s
3. Mating parts together in an assembly
6m 43s
4. Working with subassemblies
2m 9s
5. Linear and circular assembly patterns
4m 56s
6. Downloading premade parts from the Internet
3m 32s
7. Using Toolbox
4m 21s
13. 12. Advanced Mates

15m 8s
1. Mating parts with coincident, parallel, and distance mates
4m 35s
2. Mating parts with width mates
5m 53s
3. Mating parts with path mates
2m 5s
4. Mating parts by aligning planes
2m 35s
14. 13. Hole Wizard

10m 20s
1. Getting started with the Hole Wizard
4m 38s
2. Positioning holes in layout sketches
5m 42s
15. 14. In-Context Modeling

15m 27s
1. Linking sketches to other parts
4m 28s
2. Linking to layout sketches
6m 48s
3. Using the Hole Wizard in context
4m 11s
16. 15. Creating Threads on Parts

17m 15s
1. Understanding threading concepts
7m 17s
2. Using a helix and Swept Path to create a thread
4m 2s
3. Understanding internal threads
5m 56s
17. 16. Equations and Design Tables

17m 25s
1. Using equations to drive a sketch
5m 5s
2. Working with complex calculations
2m 6s
3. Integrating Microsoft Excel to manage design tables
7m 10s
4. Building assemblies using part configurations
3m 4s
18. 17. Part Drawings

23m 17s
1. Working with drawing templates
6m 49s
2. Setting up drawing options and sheet properties
3m 43s
3. Choosing the correct projection angle
2m 21s
4. Adding model views to a drawing
10m 24s
19. 18. Dimensioning

16m 8s
1. Creating general dimension notations
6m 37s
2. Creating ordinate and running dimensions
3m 0s
3. Dimensioning holes and curved features
3m 8s
4. Using the autodimension tools
3m 23s
20. 19. Adding General Annotations

14m 38s
1. Creating holes and callouts
5m 8s
2. Adding center marks and centerlines to a drawing
3m 46s
3. Adding item notes
2m 57s
4. Making drawing revisions
2m 47s
21. 20. Assembly Drawings

11m 42s
1. Adding assemblies to drawings
2m 10s
2. Including a bill of materials
1m 42s
3. Adding balloons to specify parts on an assembly drawing
1m 39s
4. Adding a title block and sheet properties
2m 8s
5. Building an exploded view for an assembly drawing
4m 3s
22. Conclusion

1m 2s
1. Next steps
1m 2s

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