The tool system is sustainable due to the low use of carbide, with an advantageous cutting price. Specifically for this purpose, Horn developed a new blank from the 117 cutting insert family. 'The development of the new blank required new solutions in manufacturing and measurement technology. Due to the small size of the cutting inserts, we had to make several adjustments in handling, grinding holders, and measurement systems,' says Horn product manager Andreas Härle. The system is suitable for numerous punching processes such as gear punching, multi-edge punching, or the punching of keyway grooves.
Compared to solid carbide punching tools, the new system shows advantages. The tool shanks enable the punching of longer or deeper grooves. The tool lengths are 20 mm, 30 mm, and 40 mm. All variants offer internal coolant supply directly to the working area. The shank diameters of the holders are 16 mm and 20 mm. Furthermore, Horn offers special clamping holders for use in groove punching units from various manufacturers. As standard, the cutting inserts are available in numerous variants.
In the first applications, the new groove punching system already showed its strengths. One user achieved a tool life of 120 pieces when punching a notch gear in a component made of hardened steel. By switching to the new Horn system, the tool life increased, while maintaining the same cutting parameters, to 1,040 manufactured components.
In addition to the significantly higher tool life, manufacturing costs also decreased due to the lower cutting price compared to the previously used solid carbide cutting edge.
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