AutoCAD

How To Curve Two Lines In AutoCAD?

Methods to Curve Two Lines in AutoCAD

Creating a curved connection between two straight lines in AutoCAD can enhance the visual appeal and functionality of a design. Whether you’re designing floor plans, mechanical parts, or other intricate projects, curving two lines seamlessly can be accomplished through several techniques. This guide outlines the necessary steps to achieve curves in AutoCAD effectively.


Using the Fillet Command for Curved Connections

  1. Access the Fillet Tool: Navigate to the "Home" tab in the ribbon. Locate the "Modify" panel and click on the "Fillet" icon. Alternatively, you can type FILLET into the command line and hit Enter.

  2. Set the Fillet Radius: Specify the radius of the curve. You will be prompted to enter a radius value in the command line. Input your desired radius and press Enter.

  3. Select the First Line: Click on the first line you wish to curve.

  4. Select the Second Line: Click on the second line. The two lines will now merge into a curved fillet at the intersection point.

Utilizing the Arc Command for Custom Curves

  1. Begin the Arc Command: Type ARC in the command line and press Enter. This opens the Arc creation tool.

  2. Choose the Start Point: Click on the first line to define the starting point of your arc.

  3. Set the Second Point: Move your cursor to the point where the arc should end, but do not click yet.

  4. Determine the Arc’s Radius: Move your cursor to adjust the curve to your desired shape. You can visually adjust the arc until it connects perfectly with the second line, then click to finalize the arc.

Using the Spline Tool for Complex Curves

  1. Activate the Spline Tool: Enter SPLINE in the command line and press Enter. This allows for more complex, smooth curves.

  2. Create the First Control Point: Click on the starting point where you want your curve to begin.

  3. Add Intermediate Points: Continue to click along the path you wish the curve to take. Each click adds a control point that helps shape the curve.

  4. Finalize the Spline: When you’ve placed the desired control points, hit Enter. The spline will now smoothly connect through all the points you’ve selected.

Employing the Polyline Method for Curved Edges

  1. Initiate the Polyline: Type PLINE into the command line and press Enter.

  2. Select Initial Point: Click to set the starting point on the first line.

  3. Switch to Arc Mode: Type A for Arc at the prompts to transition from straight lines to arcs.

  4. Set the Radius and Endpoint: Click to specify where you want the curve to end, producing a segment with a smooth arc.

  5. Complete the Polyline: If you wish to return to straight lines, simply continue clicking along the path, ending with a final click after the last line.

Frequently Asked Questions

1. How do I adjust the smoothness of a curve in AutoCAD?
To enhance the smoothness of a curve, use the SPLINE command, as it allows for more control points providing a finer curve. Alternatively, adjust the fillet radius while using the Fillet command for a more rounded edge.

2. Can I edit curves after they’ve been created?
Yes, curves created with the Fillet or Spline commands can be modified using the grips that appear when you select them. Drag the grips to change the shape of the curve or use the properties panel to enter specific values.

3. Is there a way to create a uniform radius for multiple curves in a single drawing?
Utilize the FILLET command with a set radius to ensure all created curves have uniformity. You can change this value each time you create a new curvilinear connection to maintain consistency across your design.

About the author

Wei Zhang

Wei Zhang

Wei Zhang is a renowned figure in the CAD (Computer-Aided Design) industry in Canada, with over 30 years of experience spanning his native China and Canada. As the founder of a CAD training center, Wei has been instrumental in shaping the skills of hundreds of technicians and engineers in technical drawing and CAD software applications. He is a certified developer with Autodesk, demonstrating his deep expertise and commitment to staying at the forefront of CAD technology. Wei’s passion for education and technology has not only made him a respected educator but also a key player in advancing CAD methodologies in various engineering sectors. His contributions have significantly impacted the way CAD is taught and applied in the professional world, bridging the gap between traditional drafting techniques and modern digital solutions.