Quality Control & Inspection

Quality Assurance in Sheet Metal Operations

In precision sheet metal fabrication, quality assurance is not simply a final step; it’s a fully integrated system embedded throughout the entire production process. Effective quality control ensures that every fabricated part consistently meets its dimensional, cosmetic, and functional requirements — protecting both product performance and customer confidence.

Quality control and inspection in sheet metal fabrication are essential for:

• Preventing dimensional non-conformances and assembly issues

• Ensuring each part complies with customer drawings and      specifications

• Supporting ISO 9001 and ISO 13485 regulatory compliance

• Protecting cosmetic surfaces for customer-facing components

• Reducing costly scrap, rework, or downstream failure

• Enabling long-term consistency in high-volume manufacturing

At Rollyu Precision, quality assurance is not treated as a final checkpoint. Instead, inspection and verification protocols are applied at every stage of fabrication — from material receipt to final packaging — ensuring each part satisfies both engineering tolerances and industry standards.

Multi-Stage Quality Control in Sheet Metal Fabrication

1️ Material Qualification

• Verify material certifications (MTRs) and lot traceability

• Confirm sheet thickness, alloy specifications, and surface      condition

2️ Laser Cutting & CNC Punching Inspection

• Measure hole diameters, patterns, and edge quality

• Check cut-edge integrity to avoid downstream forming issues

• Confirm machine alignment for consistent feature positioning

3️ Forming & Bending Inspection

• Verify bend angles, flange lengths, and springback correction

• Check hole-to-bend distances after forming

• Control flatness, parallelism, and squareness post-bending

4️ Welding & Assembly Inspection

• Visually inspect weld penetration, bead uniformity, and      Heat-Affected Zone (HAZ)

• Perform weld strength pull-testing when required

• Monitor for weld distortion or warpage

5️ Fastener Installation Verification

• Confirm hole sizing prior to PEM, rivet nut, or weld stud      installation

• Monitor insertion force and seating accuracy

• Conduct torque and pull-out testing for fasteners

• Inspect weld nugget integrity for projection welded studs

6️ Surface Finishing Inspection

• Verify anodizing, powder coating, plating, or bead blasting      coverage

• Check surface uniformity, color consistency, and defect-free      finish

• Measure coating thickness and surface roughness where      applicable

7️ Dimensional Inspection (Final QC)

• Use CMM (Coordinate Measuring Machine) for full 3D verification

• Apply optical comparator for non-contact hole and countersink      measurement

• Confirm flatness, parallelism, and warpage limits

• Inspect threads for depth, pitch, and class tolerance      compliance

8️ Packaging & Final Inspection

• Perform cosmetic inspection before packaging

• Verify part counts, labeling, and protective packaging      application

• Prepare inspection reports and traceability documentation for      customer release

QC Tools Used at Rollyu Precision

 Industries Served with High QC Demands

The Result: Process-Driven Consistency

At Rollyu Precision, quality assurance is deeply integrated into every fabrication step to ensure dimensional repeatability, cosmetic perfection, and functional performance — even for industries where zero-defect manufacturing is mandatory.

By embedding inspection into every operation — not simply final QC — we help our customers achieve stable, compliant, and repeatable production outcomes that reduce risk, improve yield, and protect product reputation.

Have questions about inspection capability, tolerance control, or quality documentation for your sheet metal parts?
Contact our engineering team to discuss your quality requirements and inspection needs: