Sheet Metal Factory at YiguProto Dongguan China
Laser cutting, CNC bending, welding, and finishing under one roof in Dongguan, China

Our Factory

Sheet Metal Factory in Dongguan, China

YiguProto runs a sheet metal factory in Dongguan, China. We cut, bend, punch, weld, and finish metal sheet into brackets, enclosures, frames, panels, and chassis. Everything happens under one roof, so nothing gets lost between suppliers.

We are the manufacturer, not a trading company. You buy direct from the factory that owns the machines, which means lower cost, faster replies, and one team responsible for quality.

  • Fiber lasers, CNC press brakes, welding cells, powder coating line
  • Tolerances to ±0.05 mm on cutting features
  • ISO 9001:2015 certified factory
  • 1 prototype to 100,000+ parts, no strict MOQ
Get a Quote Book a Factory Tour

The Problem We Solve

Why Sheet Metal Buyers Get Burned

These are the problems buyers tell us about every week. Here is how we take each one off your desk.

Parts Do Not Fit Together

If bends and holes drift, the frame will not close. We hold bend angle to ±1.0° and check every batch before it ships.

Too Many Suppliers

Cutting at one shop, welding at another, coating at a third. We do it all in-house, so nothing is lost in the handoff.

Weak Welds and Rework

Bad welds fail in the field. Our welders work to drawing, and every joint is checked before finishing.

Deadlines Keep Slipping

Late parts delay your build and cost you sales. We confirm a firm date with your quote and update you at every stage.

Hidden Costs After Ordering

Cheap quotes often grow after you pay. Our quote is itemized and final, with no surprise charges for setup, tooling, or packing.

Worried About Your Design

Sending files to a new supplier feels risky. We sign an NDA before you share anything, and your design stays yours.

Factory at a Glance

Inside the Sheet Metal Factory

Real numbers, so you know exactly what our factory can do.

CN

Location

Dongguan, Guangdong, China. Close to Shenzhen and Hong Kong ports for fast export.

.05

Cutting Tolerance

±0.05 mm on cutting features. Bend angle ±1.0°, bend to edge ±0.1 mm.

0.5

Thickness Range

Common sheet from 0.5 mm to 10 mm. Laser cutting up to about 20 mm.

20+

Metals

Stainless, aluminum, carbon steel, galvanized steel, copper, and brass.

1+

Volume

From one prototype to 100,000+ parts. No strict MOQ.

3-10d

Lead Time

Most parts ship in 3 to 10 business days after quote approval.

ISO

Certifications

ISO 9001:2015, with RoHS and REACH compliant materials on request.

1:1

In-House Work

Cutting, bending, welding, and finishing done in our own factory.

Equipment

The Machines Behind Every Part

Modern machines mean tighter tolerance, cleaner edges, and faster turnaround.

Fiber Laser Cutters

Clean edges and tight tolerance on stainless, aluminum, and steel, with little material waste.

CNC Press Brakes

Accurate, repeatable bends, including multi-axis work, so parts match batch after batch.

Turret Punches & Presses

Fast punching and stamping for holes, slots, and high volumes of identical parts.

Welding Cells

TIG, MIG, spot, and robotic welding for strong joints and consistent, clean seams.

Riveting Machines

Reliable riveted assemblies, a strong alternative to welding for many parts.

Powder Coating Line

Durable, colored coatings that protect against rust and give a finished look.

Deburring & Grinding

We smooth edges and grind welds so parts are safe to handle and look right.

Quality Lab

CMM, calipers, gauges, and surface checks keep every batch inside spec.

Our Solutions

Sheet Metal Fabrication Solutions

One factory covers the whole job, from flat sheet to a finished, painted part.

Laser Cutting

Fiber laser  |  Tight tolerance, clean edges

We cut flat blanks and complex outlines with clean edges and almost no burr, ready for the next step.

CNC Bending

Press brake  |  Accurate angles and radii

We form brackets, boxes, and panels with repeatable bends, so every part in the batch matches.

Punching & Stamping

Holes and slots  |  High volume

Turret punches and presses make holes, slots, and formed features fast, at a low cost per part.

Welding & Riveting

TIG, MIG, spot, robotic  |  Strong joints

We weld or rivet frames, chassis, and enclosures for strength and a clean finished look.

Surface Finishing

Powder coat, anodize, plate

We coat, anodize, blast, brush, or polish parts to protect them and match your brand look.

Assembly & Kitting

Sub-assemblies  |  Ready to install

We add inserts, hardware, and sub-assemblies, then pack and label kits so your line can install fast.

Materials

Metals We Fabricate

We stock the common grades and can source special ones. Need something not listed? Just ask.

Stainless Steel

  • 301 — springy, wear resistant
  • 304 / 316 / 316L — corrosion resistant
  • Good for food, medical, and outdoor parts

Aluminum

  • 5052 — corrosion resistant, formable
  • 5083 — strong, marine grade
  • 5754 — good weldability

Carbon & Mild Steel

  • SPCC — general purpose
  • Q235 — structural frames
  • 1020 — machinable, weldable

Galvanized, Copper & Brass

  • SGCC / SECC — zinc coated steel
  • Copper C101 / C110 — conductive parts
  • Brass C260 — connectors, trim

Common sheet thickness runs from 0.5 mm to 10 mm, with laser cutting up to about 20 mm. Material certificates are available on request.

Surface Finishes

Finishes That Protect and Look Right

Pick the finish that fits the job. We handle most finishes in-house.

As Fabricated

The raw metal finish straight after cutting and forming. Fast and lowest cost.

Powder Coating

A tough, colored coating that resists rust and scratches. Great for frames and enclosures.

Anodizing

A corrosion-resistant layer for aluminum, clear or colored, with a clean metallic look.

Electroplating

A metal coating that improves corrosion resistance or appearance on steel, copper, and nickel.

Sand Blasting

A uniform matte texture that hides marks and preps the surface for coating.

Polishing & Brushing

A brushed or mirror finish for stainless, brass, and copper parts that show.

Quality Control

How We Keep Quality Consistent

Precision is a process, not a promise. Here is how we control it at every step.

Incoming Material Check

Every sheet lot is checked against the certificate. The wrong grade never reaches the laser.

First-Article Inspection

The first part of every job is measured against the drawing before the run continues.

In-Process Checks

Bends, holes, and welds are checked during the run to catch drift early.

CMM & Gauges

Critical sizes are measured with a CMM, calipers, and gauges, and the data is recorded.

Final Inspection Report

A dimensional and visual report ships with your order on request.

Traceability

Material lots and inspection records are logged, so any part can be traced back.

Certifications & Standards

Proof, Not Just Promises

We keep the paperwork and the standards that global buyers ask for.

ISO 9001:2015

Our quality management system is certified, with documented processes and records.

RoHS & REACH

RoHS and REACH compliant materials and coatings are available on request.

Material Certificates

Mill certificates and material test reports come with your order on request.

Inspection Documentation

FAI and dimensional reports are provided so you can audit every batch.

Industries

Industries We Serve

Our sheet metal parts end up in products used around the world every day.

Automotive & EV

Brackets, frames, and battery enclosures in steel and aluminum.

Electronics

Server racks, control cabinets, and EMI shielding enclosures.

Industrial Equipment

Machine frames, protective housings, and conveyor parts.

Medical

Device housings and carts in stainless and aluminum.

Aerospace

Brackets, panels, and fixtures in aluminum and stainless.

New Energy

Solar and charging enclosures in coated, weather-resistant steel.

How It Works

From CAD File to Finished Parts in 6 Steps

A clear, proven process with no surprises. You always know where your project stands.

1

Upload & Free DFM

Send your CAD or DXF file with material, thickness, quantity, and finish needs. Get a quote and DFM report within 24 hours.

2

Approve & Plan

We confirm the process route, nesting, and tooling, then you approve the quote and we schedule production.

3

Cut & Form

We laser cut the blanks, then bend, punch, and form them to the drawing.

4

Weld & Assemble

Parts are welded or riveted into assemblies, with inserts and hardware fitted as needed.

5

Finish & Inspect

We coat or anodize the parts, then inspect every batch before packing.

6

Pack & Ship

Parts are protected for transport and shipped with tracking to your door.

Start Your Project Today

Design Tips

Simple Design Rules That Cut Cost

Good design for manufacturing (DFM) lowers cost, reduces scrap, and speeds up delivery. Here are the basics.

Keep Bends Away From Holes

Leave at least 2 to 3 times the thickness between a hole and a bend, or the hole will distort.

Use a Standard Bend Radius

Match the inside radius to a standard tool. Odd radii need special tools and add cost.

Think About Grain and Direction

Bending across the grain can crack some metals. We will advise on the best layout.

Design for the Finish

Powder coating adds thickness. Leave room on threads and tight fits so parts still assemble.

Limit Weld Complexity

Fewer, longer welds are stronger and cheaper than many short ones. Design joints that are easy to reach.

Add Relief Cuts

Small relief cuts at corners stop tearing and help bends form cleanly without cracking.

Not sure your design is ready? Send it to our engineers for a free review.

Why YiguProto

Six Reasons Buyers Choose Our Sheet Metal Factory

We are not a trading company. We are the manufacturer. Here is what that means for you.

One Factory, One Partner

Cutting, bending, welding, and finishing in-house. No handoffs, no finger-pointing, no lost parts.

Factory-Direct Pricing

No trading company and no hidden markup. You work directly with the supplier that owns the machines.

Quality You Can Measure

ISO 9001:2015 certified. Every batch is inspected, and FAI and material reports are available on request.

Engineering Support in English

Every project gets one dedicated engineer who reviews your design and replies within hours.

Scale From 1 to 100,000+

Prototype first, then scale to production on the same equipment. No re-sourcing, no surprises.

Your IP Is Protected

We sign an NDA before you share files. Your design stays private, and we never show customer parts without permission.

See for Yourself — Get a Quote

Trusted Worldwide

Companies Around the World Rely on Our Factory

"We used to split cutting and welding across two suppliers and lost days to handoffs. YiguProto does both in one factory, and our enclosures now arrive complete and on time."

— Operations Manager, U.S. electronics brand

"Their DFM notes caught two bend issues before we cut anything, which saved us a whole revision. The powder coating matched our color standard exactly."

— Product Engineer, European equipment maker

"We started with a single prototype bracket and now run thousands a year. Same factory, same quality, same engineer answering the phone."

— Founder, Australian industrial startup

12+
Years in Manufacturing
50,000+
Parts Fabricated
50+
Countries Served
ISO 9001
Certified Factory

See It Yourself

Visit the Factory Before You Commit

We would rather show you than tell you. Here are three easy ways to check us out.

Live Video Tour

Book a video walkthrough and see the machines, the quality lab, and your parts being made in real time.

Sample Parts

Ask for a sample or a sample pack in your material and finish, so you can check quality before a large order.

Visit in Person

We welcome customer visits to our Dongguan factory by appointment. Meet the team and see the process up close.

Book a Factory Tour

FAQ

Sheet Metal Factory — Frequently Asked Questions

Answers to the questions buyers ask us most often.

Our factory runs fiber laser cutters, CNC press brakes, turret punches and stamping presses, TIG and MIG welding cells, riveting machines, and a powder coating line. Most cutting, bending, welding, and finishing happen in-house.
Sheet metal fabrication turns flat metal sheet into finished parts. The sheet is cut, bent, punched, welded, and finished to make brackets, enclosures, frames, panels, and chassis. It is used for everything from prototypes to mass production.
Our cutting tolerance is about ±0.05 mm. Bend angle is held to ±1.0°, and bend-to-edge to about ±0.1 mm. If you need tighter results, tell us your key dimensions and we will confirm during the free DFM review.
We fabricate stainless steel (301, 304, 316, 316L), aluminum (5052, 5083, 5754), carbon and mild steel (SPCC, Q235, 1020), galvanized steel (SGCC/SECC), copper, and brass. Common sheet thickness runs from 0.5 mm to 10 mm, with laser cutting up to about 20 mm.
We offer powder coating, anodizing, electroplating, sand blasting, brushing, polishing, galvanizing, and silk screen or pad printing. Tell us the look and protection you need and we will recommend a finish.
Most sheet metal parts ship in 3 to 10 business days after you approve the quote. Prototypes can move faster. Large or heavily finished orders may take a little longer, and we give you a firm date with your quote.
There is no strict MOQ. We support one-off prototypes, small batch runs, and full production volumes from the same factory, so you can start small and scale up.
Price depends on material, thickness, part size, bend and weld count, finish, and order volume. Simple brackets cost the least, and complex welded enclosures cost more. Send your CAD file for an accurate, itemized quote.
Upload your 3D CAD files or 2D DXF drawings and tell us your material, thickness, quantity, and finish needs. Most quotes come back within a few hours on business days, and never more than 24 hours. Every quote includes free DFM feedback.
For sheet metal we prefer STEP (.stp, .step), IGES (.igs), DXF, and DWG files, plus PDF drawings for tolerances and notes. We also accept SolidWorks, Inventor, and Creo/ProE files.
Yes. All customer files, designs, and project details are kept strictly confidential. We are happy to sign your NDA before you share sensitive information, and we never share or display customer parts without permission.
Yes. We welcome customer visits and live video walkthroughs by appointment, so you can see the machines, the quality lab, and your parts being made before you place a large order.

Work Directly with Our Sheet Metal Factory

Upload your CAD file today and get a factory-direct quote with free DFM feedback within 24 hours. No obligation. No middleman. Just quality sheet metal parts from a China manufacturer you can trust.

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