Problemlöser auch für knifflige Fälle

HaGeForm was founded in 1992 as a branch of a company from North Rhine-Westphalia in Lößnitz in the Erzgebirge. Following a change of ownership, the company established a new site in Stollberg in Saxony. In 2012, Sebastian Baier and his father took over the business together. Since 2018, he has managed HaGeForm Sachsen with its 15 employees as Technical Managing Director along with his sister Stefanie Baier, who serves as Commercial Managing Director.

Around 90 percent of their customers are located within a radius of 50 kilometres. This proximity is a big plus for the manufacturer, since fast delivery times are becoming more and more crucial. „We do a lot of things on demand,“ explains Baier. „We usually bring the parts to the customer by car, so there are no long haulage routes.“ In addition to parts for the Die & Mould sector, components for general machining and all sorts of other industries are being produced in Stollberg as well.
 

The region‘s automotive suppliers make up a large part of its broad spectrum of customers. The parts produced by HaGeForm are mostly used in forming, cutting or spray-coating sheet metal. Often they‘re one-off productions, sample parts, prototypes and small batches. The orders have included everything from moulds for toothbrushes to parts for Formula 1. Even when the scientists at the Technology Campus of Chemnitz University of Technology come up with „crazy new things“, as Baier says, his company, which has extensive experience in fulfilling special customer requests, is called upon to provide the manufacturing expertise. The required tolerances are usually in the hundredths range, but accuracies of 5 µm are also feasible in Stollberg.

The manufacturing department has a variety of technologies at its disposal. In addition to four wire erosion machines, two die-sinking erosion machines and a grinding machine, there are three milling centres with three, four and five axes available. Parts that are to be machined by both milling and EDM are shifted to the respective areas depending on the workload. To reduce process times, the company strives to mill as much as possible, since die-sinking erosion takes much longer, making the process also more expensive. Milling currently accounts for almost half of the orders, and the trend is rising. Parts that until recently had to be eroded can now also be milled. HaGeForm‘s partnership with MAPAL has also contributed to this.
 

Bei manchen Teilen gelang der Übergang zur Komplettbearbeitung. So wurde eine Feinschneidmatrize aus pulvermetallurgischem Metall bislang nach dem Fräsen von der Maschine genommen, um anschließend noch kleine Eckradien mit Absätzen zu senkerodieren. „Wir konnten uns gar nicht vorstellen, dass das auch anders geht“, räumt Seibt ein. „Das können wir nun alles mit Fräsen abdecken, das ist schon eine ganz schöne Innovation.“ Inzwischen sind für die Hartbearbeitung bei HaGeForm auch der Hochvorschubfräser OptiMill-3D-HF-Hardened und der Kugelfräser OptiMill-3D-BN-Hardened regelmäßig im Einsatz. Um zweidimensional direkt im Harten zu schruppen, kommt der Trochoidfräser OptiMill-Tro-Hardened zum Zug. Die vollständige Ausnutzung der Schneidenlänge, die bei diesem Werkzeug immer 3xD entspricht, ist somit bei Bearbeitungen von Materialhärten bis 65 HRC problemlos möglich und garantiert eine maximale Wirtschaftlichkeit durch höchste Abtragsraten in kürzester Zeit.

Als Problemlöser hat man MAPAL schätzen gelernt. Für sehr komplexe Titanteile wurde lange über eine mögliche Bearbeitungsstrategie gegrübelt, und dann schließlich der Techniker gerufen. Felix Wendler kam mit den passenden Fräsern für Titan und blieb auch so lange, bis in Stollberg ein passendes Programm für das komplizierte Teil erstellt war und die Bearbeitung lief. Komplexe Formen in Verbindung mit besonderen Materialien stellen immer wieder neue Anforderungen an die Fertiger. „Wir werden da von MAPAL sehr gut unterstützt“, lobt Maik Seibt. „Wenn wir Probleme haben, reicht oft ein Anruf. Es ist gut, einen kompetenten Ansprechpartner zu haben, den man fragen kann.“
 

This PCD tool was also a winner at HaGeForm. It produced absolutely smooth surfaces and still looked like new after a few uses, which already suggested a long tool life. Felix Wendler sees market advantages for the Saxon manufacturers: „Very few companies are currently able to machine carbide reliably and, most of all, economically. HaGeForm is really good at that.“

The partnership is set to be maintained. The next step will be thread milling cutters for hardened material, because HaGeForm had complained that the tools from the previous supplier did not last long enough. MAPAL‘s aim is now to use a newly developed milling cutter to reliably insert as many threads as possible at material hardnesses of up to 65 HRC.