The right tool solution for the automotive industry
South Korea's Hyundai Motor Company, a leading automotive manufacturer, established its largest overseas production facility in Chennai, India. The plant began operations in the spring of 1998 and has since grown to become the second-largest and fastest-growing automobile manufacturer in the country, setting technical standards for the domestic industry. The facility produces a wide range of models, including Santro, Accent, and Sonata, covering everything from compact sedans to luxury vehicles, with engine capacities ranging from 100cc to 2000cc.
Chennai is a fully integrated manufacturing site that includes production lines, an aluminum foundry, paint shop, pressure line systems, plastic parts manufacturing units, and assembly facilities. Among these, the flexible production line can handle multiple models, with an annual processing capacity of 120,000 vehicles, ensuring high-quality inspection. The plant also features highly automated systems, enhancing efficiency and precision.
Sandvik Coromant, a division of the Sandvik Group and one of the world’s leading manufacturers of metal cutting tools, has been a key partner of Hyundai Motor (India) since the establishment of the Chennai plant. Their collaboration has significantly improved production efficiency, quality consistency, and cost reduction through the use of high-quality tools and tailored solutions.
One notable success was the improvement in the production of faultless connecting rods for the Santro and Accent models. Previously, chip control issues such as jamming cutters and interference were common, causing frequent downtime and affecting output. To address this, engineers set a goal of achieving trouble-free production. Sandvik Coromant provided customized drills, such as the Coromant Delta drill, which offered efficient drilling performance for steel connecting rods (CMC02.2, 245-300HB). These drills, available in various diameters, feature internal cooling and are ideal for precise machining. After implementation, chip breaking performance improved dramatically, and tool life increased by 166%, from 11 meters to 30.4 meters. This led to significant cost savings and eliminated chip-related issues.
Another major improvement came in the boring of cylinder bores for the Santro model. Previously, inconsistencies in bore size and uneven cutting forces caused high noise levels. By using custom Sandvik Coromant boring tools, the process achieved greater accuracy and stability. The new system reduced cutting forces, resulting in a dimensional tolerance of just +30 microns, ensuring consistent quality and safe machining.
In Shanghai, the Automobile Gearbox Factory IV relies heavily on Sandvik tools for high-speed, multi-variety production. Approximately 70% of the cutting operations in the fourth workshop are performed using Sandvik products like P-Lline inserts, Corocut, and Q-Cut knives. These tools, often customized to meet specific requirements, have significantly improved productivity and quality. For example, the use of GC4125 Corocut groove inserts doubled tool life, allowing continuous production of 160 workpieces without compromising quality.
Ningbo Yuejin Automobile Front Car Co., Ltd. produces around 60,000 steering knuckles annually for Toyota, requiring high-precision drilling. By adopting Coromant Delta drills and following recommended cutting parameters, the company achieved single-step precision previously only possible with multiple processes. This enhanced both quality and production efficiency.
The company is now developing a computer-controlled manufacturing system, integrating advanced CAM functions with existing CAD software. It is leveraging global research bases in the U.S., Germany, Italy, and Japan to adopt innovative manufacturing technologies. The ultimate goal is to further integrate Coromant products into its systems, making Sandvik tools a core part of its future expansion.
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