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Custom Sheet Metal Welding

Weld appearance is only one part of the result. Joint access, fit-up, heat input, fixture design and welding sequence can all affect distortion and final assembly dimensions.

Hongming Sheng produces drawing-based welded enclosures, frames, brackets and metal assemblies for OEM projects.

TIG Welding

MIG Welding

Spot Welding

Robotic Welding

Email: info@hms1688.com

Send Welding Drawing

For review, send PDF and STEP/STP files with material, thickness, quantity, finish and critical dimensions.

Four Issues to Review Before Welding

These decisions often have more influence on the finished assembly than the weld process name alone.

Fit-Up & Joint Access

Part gaps, edge preparation and torch access should be considered before cutting and bending begin.

Heat & Distortion

Sheet thickness, weld length, joint location and heat sequence can change flatness, angle and hole position.

Fixture & Datum Strategy

A fixture should locate the functional surfaces while allowing practical clamping and part removal.

Finish & Visible Faces

Grinding, brushing, powder coating or plating requirements should be identified together with cosmetic surfaces.

Selecting a Welding Method

TIG Welding CONTROL

Useful for controlled weld placement and projects where joint appearance requires additional attention.

Common review points: material thickness, access, heat input and post-weld finishing.

MIG Welding PRODUCTIVITY

Suitable for many steel, stainless-steel and aluminum fabrications when joint design and production needs align.

Common review points: wire and shielding selection, penetration requirement and spatter control.

Spot Welding SHEET JOINTS

Often considered for overlapping sheet-metal joints without a continuous weld bead.

Common review points: sheet stack, electrode access, spot spacing and visible indentation.

Robotic Welding REPEAT RUNS

Can support repeat production when joint position, fixture loading and part consistency are suitable for automation.

Common review points: stable fit-up, access path, fixture repeatability and expected quantity.

Process selection is project-specific. Material, thickness, joint geometry, access, appearance and required quantity should be reviewed together before choosing TIG, MIG, spot or robotic welding.

What to Show on the Welding Drawing

Weld location and joint type

Material and sheet thickness

Weld length, spacing or size

Critical datums and dimensions

Visible or cosmetic surfaces

Grinding and edge requirements

Surface treatment and masking

Inspection or test requirements

From Cut Parts to Finished Assembly

1. Drawing & Joint Review

Check materials, weld symbols, access, critical dimensions and finish requirements.

2. Cutting, Bending & Fit-Up

Prepare parts so edges, holes and bends locate correctly before welding.

3. Fixture & Sequence Planning

Define locating surfaces, clamps, tack points and welding order to manage movement.

4. Sample Confirmation

Review the first assembly for dimensions, joint position, appearance and specified fit.

5. Production & Inspection

Record the approved route and perform the agreed checks during repeat manufacturing.

6. Finish & Packing

Complete grinding, coating or assembly, then protect visible surfaces for shipment.

Materials and Typical Assemblies

Carbon Steel

Stainless Steel

Aluminum

Equipment enclosures, cabinets and access panels
Machine frames, brackets and mounting structures
Battery, power and energy-equipment assemblies
Communication and industrial-control housings
Custom sheet-metal subassemblies built to drawings

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Inspection Scope for Welded Parts

Before weldingMaterial, component dimensions, bend condition and joint fit-up.

During weldingJoint location, sequence, visible condition and key fixture references as appropriate.

After weldingAgreed dimensions, distortion, weld presence, surface condition and assembly fit.

After finishingAppearance, coating coverage, protected interfaces, threads and packing condition.

Define Any Special Weld Testing Before Quotation

Visual and dimensional inspection does not by itself confirm every structural requirement. If the project needs destructive testing, leak testing, dye penetrant, other non-destructive examination, a qualified procedure or project-specific documentation, state this on the RFQ so the required scope can be reviewed and quoted.

Frequently Asked Questions

Can welding distortion be completely removed?

Distortion can often be managed through joint design, balanced weld placement, suitable fixtures, tack sequence and controlled heat input. The expected flatness and dimensional limits should be shown on the drawing.

Can you weld finished or coated parts?

Some finishes interfere with welding or can be damaged by heat. The order of welding, grinding, cleaning and coating should be planned according to the material and finish specification.

When is robotic welding worth reviewing?

It is most useful when the geometry, fixture loading, fit-up and production demand are repeatable. A variable gap or difficult access may require design or process changes first.

Can you manufacture the complete assembly?

Projects may combine laser cutting, CNC bending, welding, grinding, surface finishing, hardware installation and final assembly according to the approved scope.

Have a Welded Enclosure, Frame or Bracket?

Send the drawings, material, thickness, quantity, finish and critical dimensions. Our team can review joint access, fixture needs and the proposed welding route before quotation.

Email: info@hms1688.com

Request Welding Review

Customer drawings, CAD files, samples and manufacturing information are handled confidentially. NDA support is available for OEM projects.

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