Turnkey mit 78 passenden Tools

Wie der Maschinenbauer CHIRON Group, ist auch MAPAL in den USA vertreten und unterhält hier mit Port Huron (Michigan) und Fountain Inn (South Carolina) gleich zwei Produktionswerke. Der Werkzeughersteller und Technologiepartner mit Stammsitz in Aalen hat frühzeitig erkannt, dass Präsenz vor Ort erforderlich ist, um auf dem US-amerikanischen Markt zu bestehen. 1977 wurde hier die erste Tochtergesellschaft im Ausland gegründet. 

Gestartet wurde in New Jersey mit der Wiederaufbereitung von Werkzeugen. Mit der Ausweitung des Geschäftsfelds auf den Automotive-Sektor in den darauffolgenden Jahren wuchs das Geschäft zusehends – schon bald wurde klar, dass der kleine Betrieb nicht ausreicht. Der nächste logische Schritt bestand darin, eine Fertigungsstätte in der Nähe der Automotive-Kunden aufzubauen. So eröffnete MAPAL 1995 den Produktionsstandort Port Huron mit Fokus auf der Herstellung und Instandsetzung hochpräziser Werkzeuge. Dazu gehören die MAPAL Reibahlen mit Führungsleistentechnologie. Die unmittelbare Nähe zur Metropole Detroit ermöglichte es, den Kunden schnellere Reaktionszeiten und enge technische Unterstützung zu bieten.
 

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. 
 

The tools supplied by MAPAL play a key role. 78 tools have been provided, with two-thirds being custom-made and precisely designed to the corresponding machining step with special geometries and dimensions. In many cases, the complexity of the tools is a direct result of the component design or the selected machining strategy. Among them, 33 of the tools are PCD tools, while the remaining 45 use carbide cutting edges.

Whenever possible, multiple machining steps have been combined into a single tool, allowing the machining of various diameters in one operation. “Cycle times are reduced with these custom tools”, explains Jesus Flores. “In this way, we save multiple tool changes every time, which improves both the machining times and precision.” Besides speed, the components require a high level of precision and quality that surpass typical automotive industry standards.