Step 0: Rigorous Source & Incoming Material Control
Our complete QC system begins before a single component is used. Our standardized incoming inspection flowchart coordinates Purchasing, Manufacturing, and Quality control departments for every material batch:
Sampling & Joint Defect Review
We abandon random sampling for standard batches. For any deviation, we initiate a strict multi-department defect review and joint evaluation to make a transparent Yes/No decision tree.
Reject or Standard Report
Non-compliant batches are immediately Rejected. Acceptable batches must pass standard QC judgment to generate a detailed, standard Incoming Quality Report, ensuring full traceability from the raw material source.
Incoming Quality Control (IQC) Pipeline
A multi-departmental workflow ensuring 100% traceability and zero defects before manufacturing begins.
Material Receiving
Raw materials arrive and enter the designated quarantine area. The ERP system generates an inspection ticket.
Precision Testing
QC inspectors conduct dimensional and spectrograph chemistry tests according to ISO standards.
Defect Review
For any deviations, a joint evaluation is initiated to hold suppliers accountable and execute corrective actions.
Final Judgment
Generate Incoming Quality Report in PLM/ERP system for lifetime raw material traceability.
Step 1: Raw Material & Machining Inspection
- 100% Comprehensive Inspection: We abandon random sampling. Every single valve block, cylinder tube, and oil pipe undergoes a 100% visual and illuminated inspection before entering the next phase.
- Endoscope Technology for Blind Holes: For complex internal structures and blind holes, we utilize industrial endoscopes to ensure zero iron filings, burrs, or rust remain hidden inside.
- Multi-Angle Verification: Machined parts are examined under direct and oblique lighting to eliminate any microscopic defects that could compromise the sealing system.
Step 2: Precision Cleaning Process
Ultrasonic & High-Pressure Washing: All critical components go through an advanced dual-cleaning process. We combine deep ultrasonic vibration with high-pressure washing to eradicate all industrial residues.
Strict Temperature & Parameter Control: Our cleaning equipment operates under strictly monitored temperatures (50°C - 60°C) with standardized cycles to guarantee consistent cleanliness.
Targeted Clearing for Complex Geometries: High-pressure pneumatic blow-drying is applied specifically to valve ports and threaded holes, preventing any fluid or particle retention.
Step 3: Standardized & Contamination-Free Assembly
- Contamination-Free Handling: Assembly technicians are strictly required to use clean rubber gloves and lint-free cloths to prevent secondary contamination during the assembly process.
- Precision Seal Installation: Seals, O-rings, and support rings are installed using dedicated tooling with strict directional protocols to prevent twisting, scratching, or cutting.
- Traceability System: Every assembled hydraulic cylinder is stamped with a unique identification code, linking it to the specific production batch and raw material supplier for lifetime traceability.
Step 4: 100% Performance & Pressure Testing
Rigorous Pressure Testing: Every completed hydraulic cylinder is mounted on our testing rig for multi-stage pressure and holding tests, complying with strict international standards.
All-Around Leak Detection: During the pressure holding phase, inspectors meticulously check the piston rod seals, welding seams, and valve block joints to ensure zero leakage.
Torque & Anti-Loosening Verification: All fittings are tightened using calibrated torque wrenches, and vital joints are marked with anti-loosening paint to ensure safety under high-vibration working conditions.
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