Drawing & Material Review
Confirm dimensions, tolerances, material, finish, welding and assembly requirements.
Quality Control
Quality Control for Custom Metal Parts
From Material Verification to Final Inspection
From drawing review and material verification to in-process inspection, final dimensional checks and packaging control, we manage quality throughout the manufacturing process.
Material Verification
First Article Inspection
In-process Inspection
Final Inspection
Quality Inspection Workbench
Part under inspection / drawing / inspection record / label / measuring tools placeholder
Overview
Four-stage Quality Control
First Article Inspection
Check first-part dimensions, structure, hole positions and assembly fit before mass production.
In-process Inspection
Stage checks during cutting, bending, welding and finishing.
Final Inspection
Check dimensions, appearance, quantity, packaging and special requirements.
Drawing and Specification Review
Drawing and Specification Review
Before production, key requirements are reviewed to reduce batch issues caused by incomplete drawings, unit mistakes, wrong revisions or structure misunderstanding.
Material grade and thickness
Critical dimensions and tolerances
Hole position, diameter and type
Bending direction and angle
Weld position and welding requirements
Surface finish
Assembly relationship
Appearance and packaging requirements
Critical Characteristics
Dimensions affecting assembly, function and safety are marked as critical, such as hole spacing, fit dimensions, bending angles, tube center distance, weld location and assembly clearance.
Incoming Material Inspection
Incoming Material Inspection
Material Type
Confirm carbon steel, stainless steel, aluminum, galvanized steel and other materials match the order.
Thickness and Dimensions
Check sheet thickness, tube diameter, wall thickness, width and length.
Surface Condition
Check rust, scratches, dents, deformation, oil stains and surface defects.
Material Identification
Identify and separate materials by order, batch and production requirements.
Material certificates can be reviewed or provided when required and available.
First Article Inspection
First part / drawing / hole-distance check / material waiting for production placeholder
First Article Inspection
First Article Inspection
Before mass production, the first completed part is checked against the drawing, sample and functional requirements. Production continues after key dimensions and structures are confirmed.
Overall dimensions
Hole position and diameter
Bending angle
Tube bending profile
Welded structure
Assembly relationship
Surface appearance
Drawing or sample comparison
In-process Inspection
In-process Inspection
Cutting Inspection
Profile, cutting size, holes, edge quality, burrs, burn marks and deformation.
Bending Inspection
Bending angle, direction, edge length, multi-bend relationship, cracks, dents and springback.
Tube Processing Inspection
Tube diameter, wall thickness, cut length, bend angle, radius, hole direction and end form.
Welding Inspection
Weld location, continuity, missing welds, weak welds, burn-through, undercut, spatter and post-weld dimensions.
Welding and Structural Inspection
Welding and Structural Inspection
Visual Weld Inspection
Check weld uniformity, missing welds, visible pores, cracks, spatter or burn-through.
Dimensional Inspection After Welding
Check whether welding distortion affects holes, flatness, perpendicularity and overall dimensions.
Assembly or Functional Check
Trial assembly, screw locking, insertion, rotation, support or fit checks according to application.
Load, pull or other functional tests can be arranged according to the product structure and customer requirements.
Surface Finish Inspection
Surface Finish Inspection
Appearance
Color, gloss, sagging, particles, scratches, exposed base and visible color difference.
Coverage
Edges, holes, welds, inner corners and hard-to-coat areas.
Adhesion
Adhesion or related checks according to finish type and order requirements.
Corrosion Resistance
Salt spray or corrosion-resistance testing is arranged according to material, finish and customer requirements.
Final Dimensional and Assembly Inspection
Final Dimensional and Assembly Inspection
Direct Measurement
Use calipers, height gauges and angle tools to measure dimensions, holes, bending angles and flatness.
Gauge or Fixture Inspection
Simple gauges, fixtures or templates can be made when needed to confirm key assembly dimensions.
Trial Assembly
Use matching parts to verify hole positions, clearances, threads and installation relationship.
Common Inspection Items
Common Inspection Items
Dimensional Inspection
Hole Diameter & Position
Bending Angle
Flatness
Perpendicularity
Tube Diameter & Wall Thickness
Weld Appearance
Assembly Fit
Thread Inspection
Surface Appearance
Coating Thickness
Packaging Check
Non-conforming Product Control
Non-conforming Product Control
When a non-conformity is identified, affected parts are marked and separated before further handling. Rework, replacement or corrective action is determined according to the issue.
- 01Identify
- 02Separate
- 03Review
- 04Rework or Replace
- 05Corrective Action
Order number
Drawing revision
Material batch
Production batch
Inspection record
Packaging label
Inspection Records and Documents
Inspection Records and Documents
Inspection records, material certificates and third-party reports can be provided according to project requirements and actual availability.
Dimensional inspection report
Material certificate
Surface treatment report
First article inspection record
Packing list
Product photos before shipment
Third-party test report
Packaging and Pre-shipment Inspection
Packaging and Pre-shipment Inspection
Quantity Check
Check product quantity against order and packing requirements.
Product Protection
Check separation, scratch prevention, rust protection and edge protection.
Labeling
Check product name, quantity, batch and carton marking requirements.
Final Appearance Check
Confirm no visible scratches, deformation, rust, missing parts or packing mistakes.
Have Specific Quality Requirements?
Have Specific Quality Requirements?
Send us your drawing, tolerance, assembly requirements, inspection standards and required documents. We will review the quality requirements before quotation and production.
CONNECTED MANUFACTURING PATH
Continue through related products, capabilities and applications
Move from the relevant product and manufacturing capability to an industry application and practical engineering guidance.