Online Sheet Metal Flat Pattern Generator
CaldereriaOnLine.com - Create accurate flat patterns for cones, transitions, pipe branches, elbows and other common fabrication parts directly in your browser.
Generate the layout, download the DXF file and take it straight to the shop floor or CNC cutting table.
Built for Fabricators
CaldereriaOnline.com was designed for fabricators and workshops that need practical sheet metal layouts without spending hours drawing developments manually.
Whether you build ductwork, hoppers, cyclones, tanks or custom industrial parts, the platform helps generate accurate flat patterns quickly and consistently.
Enter the dimensions, generate the flat pattern and download the DXF file ready for fabrication.
See How the Pattern Generator Works
The workflow is simple: choose the pattern type, enter the dimensions and generate the layout instantly.
In the video you get the complete workflow from entering dimensions to DXF export and CNC cutting preparation.
From Geometry to Flat Layout
Select the Pattern You Need
![Pattern: transition - rectangle [fillet] to round - offset](img/b4.png "Pattern: transition - rectangle [fillet] to round - offset")
Start by selecting the pattern that matches your fabrication project. Whether you're building ductwork, hoppers, reducers, pipe branches or other sheet metal components, CaldereriaOnline.com provides specialized generators for lots of common fabrication geometries.
Available pattern categories include:
- Cones and Reducers
- Square-to-Round and Other Transitions
- Pipe Branches (Tees)
- Segmented Elbows
- Spheres
- And many more
Enter Your Dimensions and Generate the Layout
Once you have selected a pattern, enter the dimensions of your actual project. The required parameters vary depending on the geometry and are presented in a straightforward form designed for fabrication work.
As you enter the values, the platform calculates the precise flat pattern required to fabricate the part, helping reduce manual layout work and minimizing the risk of costly mistakes.
Whether you're creating a simple reducer or a complex pipe branch, the process takes only a few seconds.
Download DXF Files Ready for Cutting
When the calculation is complete, the generated flat pattern can be downloaded as a DXF file compatible with most CAD/CAM systems used in fabrication shops.
The DXF files can be imported into plasma, laser, oxy-fuel and waterjet cutting machines, allowing the pattern to move directly from design to production.
For manual fabrication, the layouts can also be printed full scale and used as paper templates for marking and cutting sheet metal by hand.
Download DXF Samples
Download DXF pattern samples and see how CaldereriaOnline.com can help you generate accurate sheet metal developments ready for fabrication.
Download DXF Samples Package
Samples include:
* Cones and Reducers* Transitions
* Pipe Branches
* Hoppers
* Elbows
Common Sheet Metal Patterns
Cylinders and Cones
Generate flat patterns for cones and truncated cones used in reducers, cyclones and hopper transitions.
Transitions
Create layouts for ductwork transitions commonly used in ventilation and dust collection systems.
Branches
Generate accurate developments for cylindrical intersections, lateral branches and pipe connections.
Why Fabricators Use CaldereriaOnline
- No software installation required
- DXF files ready for fabrication
- Fast generation of common layouts
- Works directly from the browser
- Compatible with most CAD/CAM systems
- Useful for CNC cutting workflows
- Printable full-scale templates
- Designed specifically for fabrication shops
Frequently Asked Questions
Do I need CAD software?
No. The flat patterns are generated directly in your browser, so there is no need to install CAD software or additional plugins.
Once the layout is generated, you can download the DXF file and open it in most CAD/CAM programs commonly used in fabrication shops.
Can I use the DXF files for CNC cutting?
Yes. The generated DXF layouts can be used with plasma, laser, waterjet and other CNC cutting systems used in sheet metal fabrication.
Many users import the files directly into their CAM software for cutting preparation and nesting.
Can I print the patterns as templates?
Yes. Many fabrication shops print the flat patterns full scale and use them as templates for manual marking and layout work directly on sheet metal.
This is especially useful when your workshop lacks of a CNC equipment.
Can I try the tool before purchasing?
Yes. Several pattern generators are available for free so you can test the workflow and evaluate the generated layouts before subscribing.
This allows you to verify the pattern quality and DXF output using your own fabrication requirements.
If you have a corporate email address you can apply for the CORPORATE trial, with unlimited downloads for 30 days.
Start Generating Flat Patterns Online
Create your free account and start generating sheet metal layouts directly from your browser.
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