Rattunde Corp.
The CFMcurve machining center is a patented process that machines each workpiece end simultaneously using 12 independent servocontrolled axes Machining options include threading boring profile turning grooving radius edges and angled chamfering

IMTS 2012: Integrated Sawing and Machining Center

Aug. 13, 2012
Cold sawing machine with specialty machining center Precision parts from a continuous process; no operator intervention Bundles up to 16.5 meters (54 ft) long, are loaded, separated, and fed to saw  Cut parts are transferred for precise finishing

Rattunde Corporation will exhibit its ACS + CFMcurve integrated sawing and machining center at IMTS, be producing a variety of parts and demonstrating its automated flexibility. It called the ACS Sawing Machine “the new industry standard” for cold saws, explaining that it uses a proprietary sawing algorithm with servo motor controlled feed to adjust critical sawing parameters continuously during each cut.  The results, it said, are thefastest sawing times, best surface finish and longest blade life available. 

The CFMcurve machining center is a patented Rattunde process that simultaneously machines each workpiece end, using 12 independent servo-controlled axes.  Machining options include: threading, boring, profile turning, grooving, radius edges and angled chamfering.  Programming screens guide operators for quick setup on even the most complex part geometry.  No special programming is required. 

Precision parts are made in one continuous process with no operator intervention.  Bundles of mill length stock, up to 16.5 meters (54 ft) long, are placed in an automatic loader, individually separated and fed to the sawing process.  Cut parts are then transferred to the CFMcurve machine for precise finishing.  Utilizing advanced CNC controls, linear ball screws and servo motors, all mechanical motion is seamlessly integrated into the machine design for full process control.

The technology incorporated on this manufacturing center delivers exceptionally high production rates and finished product quality, according to the developer.  For example, a tubular component of 70 mm diameter, wall thickness of 5 mm, material type ST52-3 BK, with a length of 15 0mm, machined with a 30-degree chamfer on the ID and OD with a faced end has a saw time of 0.96 seconds, a machined time of 1.86 seconds, and the machine can produce 1,820 parts per hour, inspected for length and automatically packaged.  Cut length tolerance of +/- 0.15 mm at 1.67 CPK and a machined length tolerance of +/- 0.05mm at 1.67 CPK are maintained with consistency.

The operator interface saves part files for instant recall when changing parts.  Servo motors move all cutting and machining tools to their exact positions and implement saved parameters.  No tooling change is required in the ACS Saw within a diameter range of 10mm; there is a 5mm diameter range in the CFMcurve.  Tooling change for the complete system takes less than 20 minutes, when necessary.

All critical sawing and machining parameters are monitored and controlled.  Clamping forces and position, saw blade torque and vibration, plus machining insert torque are continuously displayed and monitored.  Operating limits are set and machine functions stop when they are not met.  Saw blade and tooling insert wear is predictable and consistent.  Key data for each part produced are stored in memory for statistical evaluation.  Operator guesswork is removed. 

The ACS + CFMcurve is available in three models with diameter ranges from 10 mm to 102 mm, 10 mm to 136 mm and 10 mm to 169 mm, with finished part lengths from 10 mm to 3,500 mm.  All material types can be processed.

About the Author

Robert Brooks | Content Director

Robert Brooks has been a business-to-business reporter, writer, editor, and columnist for more than 20 years, specializing in the primary metal and basic manufacturing industries. His work has covered a wide range of topics, including process technology, resource development, material selection, product design, workforce development, and industrial market strategies, among others. Currently, he specializes in subjects related to metal component and product design, development, and manufacturing — including castings, forgings, machined parts, and fabrications.

Brooks is a graduate of Kenyon College (B.A. English, Political Science) and Emory University (M.A. English.)