Turnkey with 78 suitable tools

CHIRON Group has been active in the United States since 1993, with a modern factory opening in Charlotte in 2001. The 7,000-square-meter plant employs 100 employees focused on adapting German-built machines to meet the needs of the American industry. From fine-tuning hydraulic systems to developing advanced automation and turnkey solutions, the focus is on delivering precision and efficiency. These machines are designed for efficient production of specific components and are delivered to customers fully equipped with software, clamping fixtures, and tools—ready for immediate operation.

Like CHIRON Group, MAPAL also operates in the United States with two sites located in Port Huron, Michigan, and Fountain Inn, South Carolina. The precision tool makers and technology partners from Aalen/Germany recognised at an early stage that customer proximity was essential in the American market. This insight led to the establishment of MAPAL’s first international subsidiary in 1977. It began in New Jersey with the reconditioning of MAPAL tools. As MAPAL expanded into the automotive industry in the following years, business grew significantly. It soon became clear that the small factory was no longer sufficient. The next logical step involved setting up a manufacturing site closer to key automotive customers. MAPAL opened its production site in Port Huron in 1995 with a focus on manufacturing and reconditioning of high-precision tooling, such as reamers with guide pads. Through its proximity to Detroit, the company was able to provide faster response times and comprehensive technical support to customers.
 

By consolidating technical knowledge within its international Centres of Competence, MAPAL expanded its know-how and expertise in the manufacturing sector. In 2019, the precision tool maker expanded further by opening a second factory in the southern region. The Fountain Inn site enhanced sales, service, and manufacturing capabilities, complemented by a state-of-the-art aerospace test centre. Today, MAPAL Inc. manufactures solid carbide and PCD tools at both sites using technology and processes that adhere to the MAPAL Group’s global standards. The tools include drills with one or more diameters, form cutters, reamers, and tools for composite machining – all of which are also reconditioned in-house.

CHIRON Group and MAPAL have been cooperating in North America for nearly as long as the machine tool builder has been present in the region. As a trusted OEM supplier, MAPAL has supported CHIRON Group’s work across the automotive, aerospace, and medical technology industries, as well as their suppliers. “To offer our customers the best solutions, we need reliable partners – a quality MAPAL has consistently demonstrated,” says Jesus Flores, Lead Project Engineer at CHIRON Group in Charlotte.
 

In the most recent project, MAPAL provided a complete solution for a truck manufacturer, supplying all the tools and process design. The component being produced is the front transmission housing for a large truck diesel engine. To ensure a smooth start, MAPAL supported the customer with on-site run-off support and expedited optimised tools, keeping the project on track from day one.

This highly complex component with many bores and a complicated form is machined out of aluminium A380 die-casting alloy. The customer aims to produce 120,000 units per year. With a potential production run of six to eight years, the total number of units could reach a million before a design modification may occur.
 

Efficient manufacturing is key to produce the required production volume of transmission housings. The double-spindle machining centre DZ 25 P five axis has been selected for this task, which CHIRON Group has developed especially for the productive machining of components with large volumes. Its rigid structure allows for high axis acceleration and rapid traverse speeds, ensuring dynamic and precise machining. 

In the spacious working area, the machine can process two 600 x 600 x 450 mm components simultaneously. In the first step, the workpiece is clamped in its delivered state in order to perform pre-machining, which helps release internal stresses within the component. At the same time, machining with midrange tolerance requirements takes place. The precision machining of fitting bores and surfaces relative to reference points happens in a subsequent clamping step. 
 

Ihren Anteil daran haben auch die von MAPAL gelieferten Werkzeuge, insgesamt 78 an der Zahl. Zwei Drittel davon sind Sonderwerkzeuge, die mit speziellen Geometrien und Abmessungen exakt auf die jeweiligen Bearbeitungsschritte abgestimmt sind. In vielen Fällen ist die Komplexität der Werkzeuge durch das Design des Bauteils oder die gewählte Bearbeitungsstrategie getrieben. 33 der Tools sind PKD-Werkzeuge, die übrigen 45 arbeiten mit Hartmetallschneiden.

Nach Möglichkeit werden mehrere Bearbeitungsschritte in Kombinationswerkzeugen vereint, die beispielsweise Bearbeitungen mit verschiedenen Durchmessern in einem Arbeitsschritt ermöglichen. „Mit solchen Sonderwerkzeugen verkürzen wir die Taktzeit“, erläutert Jesus Flores. „Damit sparen wir uns jeweils mehrere Werkzeugwechsel, was neben der Bearbeitungszeit auch der Genauigkeit zugutekommt.“ Denn bei dem Bauteil sind auch eine Präzision und Qualität gefragt, die selbst für die Standards der Automobilbranche außergewöhnlich sind.