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DEW Home›Machine Tools & Manufacturing Equipment›Metal Fabrication
Machine Tools & Manufacturing Equipment · Category Intelligence

Metal Fabrication

Cutting, forming, and joining metal into structures and assemblies — sheet, plate, and structural work rather than chip-cutting to net shape. The pick is driven by the process (cut/bend/weld), material and thickness, tolerance, and volume.

◆ Deep category · engineer-grade decision intelligence

Product types

Where engineers draw the lines within metal fabrication.

Cutting (Laser / Plasma / Waterjet / Punch)
Blanks and profiles from sheet/plate — fiber laser for precision metal, plasma for thick steel, waterjet for anything/no HAZ, turret punch for formed features.
Press Brake / Bending
Forms sheet into angles and channels. CNC press brakes with angle measurement hold repeatable bends; tooling and back-gauge drive accuracy.
Welding & Joining
MIG/TIG/spot/robotic welding to join fabricated parts; the source of both strength and distortion in an assembly.
Rolling / Forming / Stamping
Plate rolls for cylinders, roll forming for profiles, and stamping/press work for higher-volume formed parts.
Structural / Heavy Fabrication
Beams, frames, and weldments — cutting, coping, fit-up, and welding of structural steel.

Specs that matter

The numbers to compare first — and which are hard deal-breakers.

Material type & thickness range
Sets every process and machine choice — thin sheet vs structural plate are different shops.
Deal-breaker
Process capability (cut/bend/weld) on site
Whether the work can be done in-house or needs outsourcing/handling.
Deal-breaker
Bend accuracy / tolerance (press brake)
Angle and dimensional repeatability drive downstream fit and assembly.
Key
Part/sheet size & machine envelope
Largest blank, bend length, and weldment the shop can handle.
Key
Weld quality / distortion control
Joins must meet code and hold shape — distortion is the classic fab problem.
Key
Automation & throughput (nesting, robot weld)
Volume work needs nesting, automated bending, and robotic welding to be competitive.
Nice-to-know
Finishing (deburr, grind, coat) integration
Edges, weld cleanup, and coating affect final quality and lead time.
Nice-to-know

How engineers decide

Rules of thumb behind the common trade-offs.

Laser, plasma, or waterjet for cutting?
Laser for precision and thin-to-medium metal at speed. Plasma for fast, economical thick steel where edge tolerance is looser. Waterjet when you need no heat-affected zone, or to cut thick, reflective, or non-metal material — slower but versatile.
How do I control weld distortion?
Sequence and balance welds, use fixturing and tacking, minimize heat input, and consider stitch welds. Design for it: symmetric joints and correct weld size. It's cheaper to prevent than to straighten.
Press brake tolerance — what's realistic?
CNC brakes with angle measurement and good tooling hold tight, repeatable bends; springback varies by material and grain direction, so account for it and bend test coupons. Bend allowance and consistent material are half the battle.
In-house or outsource a process?
Bring in-house the processes central to your volume and lead time; outsource occasional or capital-heavy steps (e.g. large plate rolling, specialty coating). Handling and logistics cost is part of the math.
▼ From the field

What goes wrong — War Stories

Expensive failure modes engineers design around.

⚠ Weld distortion / warped assemblies
Cause: Excess/unbalanced heat input, poor fixturing
Design around it: Balance weld sequence, fixture and tack, minimize heat, stitch weld, design symmetric joints.
⚠ Springback / wrong bend angle
Cause: Material variation and grain direction not accounted for
Design around it: Test coupons, bend with grain in mind, use angle-measuring CNC brakes, correct for springback.
⚠ Cracking at bends
Cause: Bending across grain, too-tight inside radius for the material
Design around it: Bend across/with grain appropriately, use adequate inside radius, choose formable grade/temper.
⚠ Fit-up / tolerance stack in assemblies
Cause: Accumulated cut and bend variation
Design around it: Tighten upstream tolerance, use locating features/tabs, control the datum scheme through the build.

Key builders

Manufacturer-direct sources we anchor specs to.

TRUMPFAmadaBystronicPrima PowerLVDSalvagniniHypertherm (plasma)Flow / OMAX (waterjet)Lincoln / Miller (welding)

Standards we hold specs to

AWS D1.1Structural welding code — steel
ISO 2768 / ISO 13920General & welding fabrication tolerances
ISO 9013Thermal cutting — cut-edge quality classification
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Decision tools

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