Starrag Group Affordable horizontal machining centres for high productivity
Starrag Group is a global technology manufacturer of high-precision machine tools for milling, turning, boring and grinding workpieces of metallic, composite and ceramic materials. The company's products are marketed under the brand Starrag and include the product ranges Berthiez, Bumotec, Dörries, Droop+Rein, Ecospeed, Heckert, Scharmann, SIP, Starrag and TTL.
Starrag has just launched a new series of Heckert horizontal machining centres that have traverse rates of up to 80 m/min. It says that with designations of H45, H50, H55, L40, L50, L55 and X40, the new five-axis machines have a smaller footprint and are up to 30% smaller than traditional horizontal machines. The company says they provide acceleration rates of 1.2 g, chip-to-chip tool-change times of 2.2 secs and pallet-change times of 8.5 secs.
Their modular design enables the use of different pallets (400 or 500 mm). Their spindle and column options allow users to specify versions for either dynamic machining of, for example, aluminium (with a HSK63 spindle on a lightweight aluminium column) or a high-torque HSK100 unit (which utilises a steel column) for processing materials such as titanium. This results in an affordable machine range, incomparable in terms of speed and productivity, which is easily configured to user demands and available for delivery within as little as 12 weeks, the Swiss-based company claims.
Many aspects of Starrag’s machine construction principles are applied to these machines, which share a common platform, including a mineral bed for optimum temperature and vibration resistance, linear guideways and a centralised swarf conveyor as well as unified and easily accessible coolant and lubricant systems. All these advantages allow for minimal downtime and high levels of reliability.
Dr Marcus Otto, managing director of the Starrag plant in Chemnitz where the new Heckert units were developed, explained that the company rethought the machine design attributes to include the positioning of the swarf conveyor, re-arranging the coolant and lubrication systems, and using a one-piece sheet metal machine ‘skin’. This in turn makes it possible to meet the demands of readily-available machines that can be configured to individual needs with optimised machining operations and speed, while having a small footprint.
L40, the smallest unit, measures 560 x 550 x 680 mm in the X, Y and Z axes, allowing for workpiece heights of up to 600 mm and loads of up to 600 kg. The maximum 20,000 revs/min spindle offers torque of up to 453 Nm. The company offers an optional NC rotary table for turning operations. L40 is offered as a four-axis or fixe-axis model.