NSK’s ground ball screws, linear roller guides and super-precision ball bearings are helping IMSA to consolidate its market position in the field of specialised deep-hole drilling machines, which are particularly popular for mould-making applications in the automotive sector.

“Our partners have always played a fundamental role in all of the technological innovations that distinguish our company,” says Marco Colombo, head of the technical department at IMSA. “In order to put our design ideas into practice, we use top-quality components that can guarantee the best performance and reliability over time. For example, NSK has always been our point of reference in motion control throughout the evolution of our machines. The availability of optimal-quality NSK bearings, ball screws and linear guides has allowed us to build the highest performance machines in our sector.”

One of IMSA’s most recent innovations has been the development of a rotary-tilting table, which allows the machining of moulds in five axes using just one clamping position, further reducing manufacturing time. MF1000-3T EVO, a deep-hole drilling machine for small to medium automotive moulds up to 2.5 tonnes in weight, is the first model to be equipped with this solution. Here too, IMSA is using NSK’s latest-generation solutions to achieve the very high performance required.

“To transform axial movement into rotary movement, we use two 63 mm diameter NSK ZSS series ground ball screws,” says Colombo. “Compared with the ball screws of previous generations, they guarantee greater rigidity and perform better in terms of speed and load capacity. As a result, the machine’s working axes can move at feed rates of up to 30 m/min.”

For further information
www.nskeurope.com

A few years ago, T&R Precision Engineering in Foulridge, Lancashire, started manufacturing parts from Inconel 625 castings for the hot air side of the GE-Safran LEAP-1A turbofan that powers the Airbus A320neo family of single-aisle jets. The problem was that the work involved a labour-intensive sequence of three or four operations on separate machines.

A more efficient process route for the drilling, milling, chamfering and turning operations was therefore sought by the aerospace components supplier, which employs more than 70 people. The ideal solution identified by engineering manager Graham Gilbert involved the purchase from NCMT of an Okuma MU5000V five-axis VMC equipped with a Dutch-made Cellro 30-station pallet storage and retrieval system served by a six-axis industrial robot.

Managing director Tim Maddison says: “The improvement in production performance has been enormous across the four different LEAP-1A castings that we machine. We now produce all components in a single hit as part of a one-hour cycle, which means that eight parts are now ready the same day rather than after a week. The substantial saving in lead-time is accompanied by vastly less workpiece handling and work-in-progress on the shop floor, while at the same time fewer free-issue Inconel castings need to be supplied by our US customer at any given time, saving them money as well.”

A further benefit is a 50% reduction in total processing time compared with producing the parts in three or four separate operations. An additional saving that Maddison describes as “massive” comes from inspecting every completed part on the VMC in a 10-minute routine at the end of the cutting cycle. So instead of 100% inspection on a CMM, only one part per day now needs checking offline.

For further information
www.ncmt.co.uk