Hoffmann Group USA has expanded its tool family for Parabolic Performance Cutting (PPC) to include a new PPC indexable insert and Garant PPC solid-carbide barrel milling cutters for high-alloy and hardened steels. The PPC process represents a further development of ball-nosed slot drill cutting and is also known as barrel milling. It is primarily used for finishing free-form surfaces in machining tool building, tool manufacturing and die making and achieves either up to nine times shorter processing times or a significantly improved surface quality.
With its new PPC indexable insert which is compatible with the Garant precision copy milling cutters as tool bodies, the Hoffmann Group is launching an alternative to PPC solid-carbide barrel milling cutters with a straight or stub point conical-shaped main cutting edge onto the market. The PPC cut-off inserts are suitable for processing flat faces and freely accessible surfaces without interference contours on the 3-axis machine and are available for steel, high-alloy and hardened steels, stainless steel and aluminium. Garant precision copy milling cutters, which are suitable as tool bodies, are available in steel and solid-carbide versions, including a Garant PowerCard.
In addition to the new PPC indexable insert, the Hoffmann Group has optimized three versions of its PPC solid-carbide barrel milling cutter for hard machining. The new tools have a tangential, conical or stub point conical form and are suitable for finishing flat faces and large surfaces with interference contours, as well as deep and hard-to-access cavities. Due to these qualities, they show their full potential on the 5-axis machine. The new Garant PPC indexable milling inserts are also available to users for finishing components made from high-alloy or hardened steels with freely accessible surfaces without interference contours.
All new Garant PPC indexable inserts, including tool bodies and the new GARANT PPC solid-carbide barrel milling cutters for hard machining, are available immediately. The precondition for PPC is a CAD/CAM software coordinated to the milling strategy, which allows the tool geometries to be processed as a data model.
Related Glossary Terms
- flat ( screw flat)
flat ( screw flat)
Flat surface machined into the shank of a cutting tool for enhanced holding of the tool.
- gang cutting ( milling)
gang cutting ( milling)
Machining with several cutters mounted on a single arbor, generally for simultaneous cutting.
- indexable insert
Replaceable tool that clamps into a tool body, drill, mill or other cutter body designed to accommodate inserts. Most inserts are made of cemented carbide. Often they are coated with a hard material. Other insert materials are ceramic, cermet, polycrystalline cubic boron nitride and polycrystalline diamond. The insert is used until dull, then indexed, or turned, to expose a fresh cutting edge. When the entire insert is dull, it is usually discarded. Some inserts can be resharpened.
Machining operation in which metal or other material is removed by applying power to a rotating cutter. In vertical milling, the cutting tool is mounted vertically on the spindle. In horizontal milling, the cutting tool is mounted horizontally, either directly on the spindle or on an arbor. Horizontal milling is further broken down into conventional milling, where the cutter rotates opposite the direction of feed, or “up” into the workpiece; and climb milling, where the cutter rotates in the direction of feed, or “down” into the workpiece. Milling operations include plane or surface milling, endmilling, facemilling, angle milling, form milling and profiling.
- milling cutter
Loosely, any milling tool. Horizontal cutters take the form of plain milling cutters, plain spiral-tooth cutters, helical cutters, side-milling cutters, staggered-tooth side-milling cutters, facemilling cutters, angular cutters, double-angle cutters, convex and concave form-milling cutters, straddle-sprocket cutters, spur-gear cutters, corner-rounding cutters and slitting saws. Vertical cutters use shank-mounted cutting tools, including endmills, T-slot cutters, Woodruff keyseat cutters and dovetail cutters; these may also be used on horizontal mills. See milling.