MACH 2014 - Guhring presents tooling novelties

PowerTap offers an unbeatable price performance ratio and is suitable for all materials, says the company. Whether cast iron, aluminium and aluminium alloys, or stainless and acid-resistant, high strength or general steels, the range provides powerful taps for the most popular threads. Elsewhere, RF 100 A high performance milling cutters are for aluminium and Al- wrought alloys. They features nano-polished surfaces and offer up to 25% higher feed rates, while simultaneously boosting tool life. The innovative flute geometry, combined with an unequal helix angle of 39°/40°/41°, enables optimal chip evacuation with vibration-free operation, while the newly developed cross centre face cutting geometry permits drilling, plunging or ramping operations with a near constant feed rate. Turning to drilling and the RT 100 T ALU vario solid carbide spiral-fluted deep hole drills offer up to 30xD capability. The cutting edge geometry is optimised to produce chips that can be evacuated from deep holes as easily as possible. Furthermore, the high quality surface finish of the flutes delivers low frictional resistance and so allows for evacuation of the optimally formed chips quickly and without problems from deep holes. The Gührosync synchro chuck is intended to compensate for synchronisation errors during tapping. Such synchronisation errors result in high forces acting on the tool, which reduce tool life and leads to defective threads. GühroSync offers the advantages of synchro and hydraulic chucks in a single system. Thanks to the application of long-lasting metal spring and polymer damping elements, the axial and radial forces are perfectly sprung as well as damped. Loading at the thread flank is reduced, so tool life and process reliability are increased. A complete interchangeable insert drilling system for highly accurate holes in the diameter range from 11 to 40 mm is how the HT 800 WP is described. Interchangeable standard inserts support a variety of applications in steel, stainless steel, cast iron and aluminium. The HT 800 WP drilling system is designed for drilling depths 1.5xD, 3xD, 5xD, 7xD and 10xD. Furthermore, there are holders and interchangeable inserts for pilot drilling and countersinking, too. A quantum leap in PCD milling technology is how the Hollfelder-Gühring HPC milling solution is described. Technical features such as chip guiding elements, radial coolant exits and 10x re-grindable PCD cutting edges enable maximum productivity and energy efficiency from a low investment. When applying conventional face milling cutters, chips are uncontrolled and enter the workpiece through the axially open chip chambers. In the case of the new HPC system, the replaceable chip guiding elements combined with the radial coolant exit divert the chips away from the workpiece. This prevents chips reaching the highly sensitive internal areas of the workpieces. And thanks to the high number of teeth - 27 PCD cutting edges for a 125 mm diameter cutter - feed rates up to 60,000 mm/min are possible, with machining time drastically reduced. Axial run-out of the cutting edge is micron accurate and adjustable. Guhring's CFRP milling cutter for composite materials offers delamination-free milling of unidirectional CFRP. With the new CFRP varieties there is a noticeable trend towards reduced resin content and, above all, the unidirectional orientation of the fibres. While the fibres in woven condition are firmly embedded in the resin fibre matrix, in the unidirectional CFRP they lie next to each other in the resin, resulting in a lack of interlocking embedding. Milling can cause the fibres to easily tear out of the composite, with the higher the cutting force, the greater the effect. Guhring's research centre for composite materials developed a new milling cutter with an innovative cutting edge arrangement. Two cutting edges are positioned with respect to each other at a helix angle of 25°. In addition, the tool possesses unequal spacing of cutting edges at the circumference…a practice perfected with carbide milling cutters and reamers. The result is: no tendency for premature delamination; extremely smooth operation, even with unstable clamping; delamination-free machining; and longer tool life.