SolidWorks Sheet Metal: Tools, Workflow, and Setup Basics

How the SolidWorks sheet metal tools turn a folded design into an accurate flat pattern, and how to hand your fabricator a DXF that cuts right the first time.

You can model a bracket exactly as it will be bent, then flatten it to the blank your fabricator cuts — with bend allowances, reliefs, and the K-factor already accounted for. That is the job of the sheet metal tools in SOLIDWORKS® 3D CAD, and they reward a few minutes of setup before the first flange. This guide covers the core tools, the parameters that decide flat-pattern accuracy, and how to get a clean DXF to the shop without rework.

Here is a tutorial on the basics:

Sibe is a cloud CAD document management platform with a native SolidWorks add-in. The flat patterns and drawings you produce this way go to fabricators as share links that open in any browser — no account, no viewer install — with every revision tracked as you release it.

What the sheet metal tools do

The sheet metal environment builds folded parts that flatten with a single click. You design the part as it will exist in the real world — bends, hems, jogs, and formed features included — and SolidWorks generates an accurate flat pattern for laser cutting, punching, or press-brake work, taking bend radii and reliefs into account. Because thickness and bend behavior are properties of the part, every feature you add stays makeable from flat stock.

Set the parameters before the first bend

Flat-pattern accuracy is decided by a handful of values in the Sheet Metal folder at the top of the feature tree. Set them before modeling, not after:

If your fabricator gives you K-factors or bend deductions measured on their press brake, use those numbers. The defaults produce a flat pattern; the shop's numbers produce the right one.

The core features

• Base Flange/Tab — starts the part from a sketch and a material thickness; the first wall everything else grows from
• Edge Flange and Miter Flange — add walls to edges with full control over angle, length, and position; a miter flange runs a profile along several edges at once
• Sketched Bend — folds the part along a line you sketch, for bends that do not sit on an edge
• Hem and Jog — fold an edge back on itself for stiffness and safe edges, or offset a flange in one feature
• Forming Tool — presses louvers, dimples, lances, and ribs from the Design Library into the part
• Convert to Sheet Metal — turns an imported solid body into a sheet metal part with recognized bends and thickness

And the one that makes it all pay off: Flatten. One click generates the flat pattern, with bend lines and reliefs placed from the parameters above.

From flat pattern to a clean DXF

Fabricators quote and cut from the flat pattern, and most want it as a DXF or DWG. Two ways to hand it over:

1. Direct export — right-click a face of the flattened part and choose Export to DXF/DWG. In the export options, output the flat-pattern geometry, put bend lines on their own layer, and leave sketches and hidden edges out
2. A drawing of the flat pattern — insert the flat-pattern view into a drawing, add a bend table and bend-line notes, and the same sheet tells the brake operator direction, angle, and radius for every bend

Either way, check three things before sending: the geometry is 1:1 scale, the units are stated, and bend lines sit on a separate layer from cut edges so the laser does not cut them. Those three checks cover most "the blank came back wrong" conversations.

Tips for better sheet metal design

• Define thickness, bend radius, and K-factor before starting the model
• Keep material thickness uniform through the part — mixed gauges cannot be cut from one blank
• Reuse library features like louvers and dimples from the Design Library instead of remodeling them
• Add bend reliefs where a bend meets an edge, so material does not tear or deform during bending
• Keep holes and cutouts clear of bend zones — distorted holes are the most common bend-zone defect
• Check minimum flange lengths against your shop's press-brake tooling before detailing

Why it matters

The dedicated sheet metal tools exist so that what you model can actually be made. SolidWorks handles bend deductions, K-factors, reliefs, and material thickness automatically, which removes the class of errors where a hand-calculated blank comes back a few millimeters short. The flat pattern feeds CAM software and CNC cutting machines directly, so design-to-fabrication is a file transfer, not a re-draw.

Where Sibe fits

Sheet metal work ends with files leaving the building, and that is the part Sibe manages. Drawings and flat patterns go out as share links that open in any browser, and reviewers mark up DWG and DXF files right there — a fabricator flags a tight bend on the drawing itself instead of in an email thread. Manual Exports generate PDF, STEP, DXF, or DWG from a file on demand, and on the Business Plus plan, Automated Exports produce those production files automatically when a design is released. Engineers keep checking work in and out directly in SolidWorks, with every revision tracked. See secure design sharing and design reviews for how teams run it. No servers, no VPNs, no admin hassles.

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