Quality Control Plan for Tuning Fork Level Switches
Raw Material Quality Control
- Material Selection and Verification: All raw materials used in production, especially critical materials like stainless steel, must undergo a stringent quality inspection process, including chemical composition analysis, hardness testing, and corrosion resistance testing, to ensure they meet international quality standards.
- Supplier Management: High-standard suppliers are carefully selected and regularly audited, with strict control over the supply chain to ensure the stability and consistency of raw materials.
Process Quality Control
- Stage-wise Quality Inspection: Quality inspection points are established in key production processes, such as laser welding, surface treatment, and assembly. The inspections cover critical parameters like dimensional tolerance, surface finish, and welding strength to ensure each step meets design requirements.
- Process Monitoring and Traceability: A digital management system is used to monitor and record production parameters in real time, ensuring that quality inspection results for each stage are traceable. This enables quick identification of issues to ensure product consistency.
Assembly and Calibration Quality Control
- Automated Assembly Inspection: Automated assembly is integrated with visual detection and automated testing equipment to verify that key parameters of the tuning fork level switches, such as fork position and fastener torque, meet design specifications, enhancing assembly accuracy.
- Frequency Tuning and Calibration: During the testing phase, each tuning fork level switch undergoes high-precision frequency calibration to ensure accurate response in different media. Frequency tuning equipment is used to fine-tune the resonance frequency, ensuring optimal performance.
Finished Product Testing
- Comprehensive Performance Testing: A series of strict performance tests are conducted before products leave the factory, including:
- Vibration Frequency Testing: Checking if the tuning fork’s vibration frequency falls within the design range to ensure the accuracy of signal output.
- Anti-Interference Testing: Simulating complex field conditions with electromagnetic interference and temperature fluctuations to verify product stability.
- Pressure Resistance and Sealing Testing: Pressure resistance tests are conducted to verify product sealing, ensuring no leakage under high-pressure conditions.
- Environmental Adaptability Testing: Testing under high and low temperatures, humidity, and other environmental conditions to ensure the reliability of the tuning fork level switches in various operating environments.
Continuous Improvement and Customer Feedback
- Quality Feedback Mechanism: A comprehensive quality feedback mechanism is established to collect user feedback and experiences, with regular analysis. Identified issues are addressed, and production processes are optimized accordingly.
- Data Analysis and Improvement: Quality inspection data is analyzed to identify potential production risks or weaknesses, forming a closed-loop quality management system to continuously improve overall quality levels.
Certification and Quality Management System
- ISO 9001 Quality Management System: Production and inspection strictly follow ISO 9001 quality management standards, ensuring stability and consistency in every process stage.
- Industry Certification Compliance: The tuning fork level switches have passed multiple domestic and international authoritative certifications (e.g., SIL, 3C, EMC), meeting both domestic and international market quality requirements.
Conclusion
This quality control plan is based on a comprehensive quality management system, covering all stages from raw materials to production processes, assembly and calibration, final product inspection, and customer feedback. Through continuous improvement and technical optimization, we are committed to providing high-reliability and high-quality level measurement products to meet the stringent demands of industrial measurement.