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A major automotive manufacturer needed a reliable supplier for engine cylinders, a core component that directly affects engine performance and fuel efficiency. The cylinders required high dimensional accuracy (tolerance of ±0.01mm for the bore diameter) and excellent surface finish to ensure proper sealing with piston rings. The client also demanded a low defect rate (≤ 0.03%) to maintain production efficiency.
We implemented a high-volume, high-precision machining process. We used gray cast iron (HT300) for the cylinder material, which offers good thermal conductivity and wear resistance. For machining, we deployed automated CNC production lines with 4-axis milling machines and honing machines. The production line included in-line inspection stations, where each cylinder was measured using coordinate measuring machines (CMMs) to ensure compliance with specifications. We also optimized the cutting tools and coolant system to reduce tool wear and improve surface finish.
Over three years of cooperation, we maintained a defect rate of 0.02%, below the client’s requirement. The cylinders we produced helped the client’s engines achieve a 5% improvement in fuel efficiency and a 10% reduction in emissions. As a result, we were awarded the “Exempt Supplier” status by the client, meaning our products skip incoming inspection, further streamlining their production process.
These cases demonstrate the versatility and value of CNC machining services in addressing complex manufacturing challenges across industries. By combining advanced technology, customized solutions, and strict quality control, professional CNC machining providers can help businesses achieve their production goals, improve product performance, and gain a competitive edge in the market.
