Home/Quality Control

Inspection System

Quality Control & Inspection

Ensuring precision and reliability in every aluminum casting. From raw material verification to final shipment release, Bohua applies full-process quality control for dimensional accuracy, internal soundness, and repeatable production performance.

Material verification

Incoming alloy materials and melt chemistry are checked before production begins, reducing variation at the source.

In-process discipline

Key casting and machining parameters are monitored during production to keep dimensions, density, and repeatability stable.

Final release control

Finished parts are inspected against drawing, appearance, and customer-specific requirements before shipment approval.

Quality Philosophy

Quality is built into the process, not inspected in at the end

Bohua operates under an ISO-based quality management system with inspection checkpoints across incoming material control, melting, casting, machining, and final release. The goal is simple: stable quality, traceable results, and fewer surprises for overseas buyers.

For aluminum casting programs, controlling only the finished part is not enough. We focus on the full route — alloy chemistry, melt condition, process stability, dimensional verification, internal defect detection, and customer-specific acceptance criteria.

📡

X-Ray Inspection

X光探伤机

Real-time radiographic inspection helps us see what the eye cannot. It is used to detect internal porosity, shrinkage cavities, inclusions, and hidden discontinuities inside aluminum castings. This is especially important for structural parts, pressure-tight housings, and components with critical wall sections. X-ray inspection gives buyers stronger confidence in internal integrity before machining or shipment.

What it checks

Internal porosityShrinkageInclusionsHidden casting defects
📐

CMM – Coordinate Measuring Machine

三坐标测量机

The CMM verifies critical dimensions in three-dimensional space with high precision. It is used for datum validation, hole positions, flatness, profile checks, and detailed dimensional reports. For tighter-tolerance parts, CMM inspection supports first article approval and ongoing process verification. It is a core tool for automotive and industrial programs that require measurable traceability.

What it checks

DimensionsGeometric tolerancesHole positionProfile and flatness
🛰️

3D Scanner

3D扫描仪

A 3D scanner captures the full surface geometry of a casting quickly and visually. It is valuable for comparing actual parts to CAD models, identifying shape deviations, and evaluating complex contours that are harder to inspect with point-by-point methods alone. This helps speed up sample validation and problem analysis. It is especially useful for larger or more complex aluminum castings.

What it checks

Surface profileCAD deviationComplex geometryWarping trends
🧪

Spectrometer

光谱分析仪

The spectrometer confirms whether the alloy chemistry is within the required specification before and during melting. It measures elemental composition rapidly, helping control silicon, magnesium, copper, iron, and other key elements. This protects downstream mechanical performance and casting consistency. For export OEM work, chemistry verification is a basic but essential control point.

What it checks

Alloy compositionElement percentageHeat consistencyMaterial conformance
🏋️

Tensile Testing Machine

拉力试验机

Mechanical testing verifies whether the casting and heat-treatment condition can achieve the required strength and ductility. The tensile testing machine measures performance using standardized test specimens. It helps confirm whether the process is delivering the expected material behavior for structural applications. This is important for projects where reliability matters more than appearance alone.

What it checks

Tensile strengthYield strengthElongationMechanical property validation
🔬

Metallographic Microscope

金相显微镜

Metallographic analysis lets us examine the internal microstructure of aluminum samples after sectioning and preparation. It helps evaluate grain condition, eutectic structure, porosity distribution, and process-related metallurgical quality. When process optimization or failure analysis is needed, this tool provides deeper technical evidence. It supports both routine validation and root-cause investigation.

What it checks

MicrostructureGrain conditionPorosity distributionMetallurgical quality
⚖️

Density Balance

密度天平

The density balance is used to assess density-related quality and to support process control for aluminum melts and samples. It helps us evaluate compactness and consistency in relation to porosity and internal soundness. This is a practical control method during production and validation stages. Used together with other inspection tools, it strengthens confidence in casting integrity.

What it checks

DensityCompactnessPorosity tendencyMaterial consistency
💨

Hydrogen Analyzer

测氢仪

Hydrogen content in molten aluminum directly affects the risk of gas porosity. The hydrogen analyzer helps us check melt condition before pouring so corrective actions can be taken early. Lower hydrogen means better internal quality and more stable downstream results. This is a key process control point for improving casting soundness.

What it checks

Hydrogen levelMelt cleanlinessGas porosity riskPouring readiness
🪵

Surface Roughness Tester

粗糙度仪

Surface finish matters for sealing faces, machined areas, appearance-critical parts, and coating performance. The roughness tester measures surface texture objectively rather than relying on visual judgment alone. It supports machining verification and helps ensure the part meets drawing or customer requirements. This is especially relevant where assembly, sealing, or post-treatment is involved.

What it checks

Ra / roughness valueMachined finishSurface consistencyFunctional sealing surface quality
🧂

Salt Spray Testing Machine

盐雾试验机

Salt spray testing evaluates corrosion resistance under accelerated conditions. It is used when a casting requires protective coating validation or long-term environmental durability assessment. For automotive and outdoor industrial parts, this helps verify whether the chosen finishing route is suitable. It gives buyers a clearer basis for approving coating and corrosion-performance expectations.

What it checks

Corrosion resistanceCoating performanceSurface protection durabilityEnvironmental reliability

Process Control Flow

From material input to shipment release

Our inspection workflow is designed to catch risk early, verify process stability during production, and confirm finished parts before delivery.

01

Step 01

Incoming material inspection

Verify raw material certificates, alloy composition, and incoming quality before production release.

02

Step 02

Melt and process control

Control hydrogen level, chemistry, temperature, and key production parameters during melting and casting.

03

Step 03

In-process dimensional and visual checks

Monitor critical dimensions, appearance, and process stability during casting, machining, and finishing.

04

Step 04

Final inspection and shipment release

Confirm dimensional accuracy, internal quality, mechanical performance, and customer-specific requirements before packing.

Standards & Documentation

Certified processes. Flexible customer requirements.

ISO 9001:2015 quality management

Bohua follows a documented quality management system with controlled processes, traceability, inspection records, and continuous improvement discipline.

Automotive-style quality support

For suitable programs, we can work to customer-specific quality requirements including PPAP, FMEA, SPC, control plans, dimensional reports, and other serial-production documentation.

Full-process quality mindset

Quality is not treated as a final sorting activity. It starts from incoming materials and continues through casting, machining, inspection, packing, and shipment release.

Quality capability snapshot

Quality systemISO 9001:2015
Automotive supportPPAP / FMEA / SPC / Control Plan
Core inspectionX-ray, CMM, 3D scan, spectrometer
Material validationChemistry, hydrogen, density, microstructure
Performance validationTensile, roughness, corrosion testing

Quality Control FAQ

What inspection equipment does Bohua use for aluminum castings?

Bohua uses X-ray inspection, CMM, 3D scanning, spectrometer, tensile testing, metallographic microscope, density balance, hydrogen analyzer, surface roughness tester, and salt spray testing equipment to verify internal quality, dimensions, chemistry, mechanical properties, and corrosion performance.

Can Bohua support customer-specific quality requirements?

Yes. Bohua can align inspection and documentation with customer requirements, including dimensional reports, PPAP-style submissions, FMEA, SPC, control plans, and application-specific quality checkpoints depending on project scope.

How does Bohua control quality during production?

Quality control starts with incoming material verification, continues through melt and process control, and ends with final dimensional, visual, internal, and customer-specific inspection before shipment release.

Need a quality report before sourcing?

Tell us your drawing, acceptance criteria, or industry standard. We can discuss inspection plans, documentation scope, and project-specific quality requirements.