How to high precision flute grinding CNC tools?

Flutting grinding is one of the most demanding and time-consuming operations, as the cutting depth is typically 7-8 mm. The large contact area makes it difficult for the coolant to reach the grinding zone, so excessive heat will be generated, which may cause damage to the workpiece surface or reduce the particle strength of the thermosensitive diamond abrasive.

The machining of cutter spiral groove, with large material removal and low processing efficiency, can be completed by the grinding process of large cutting depth and small feed with powerful grinding wheel. The grinding parameters not only affect the quality of the cutting edge, but also affect the surface quality of the cutting surface before the tool circle, and even lead to burns and micro-cracks in the spiral groove after grinding.

The fluting grinding process of  CNC tool is generally:

Fluting, polishing fluting, gash (rough), gash (finish), end surface (rough), end surface (finish), back carving
Hybrid diamond flute grinding wheel is mainly used for CNC cutting tool flutting, abrasion resistance and sharpness of grinding wheel requirements are high, and powerful flutting grinding wheel to meet the use of large cutting depth, large feed characteristics, the use of strong to improve the efficiency of carbide cutting tool flutting.

Due to low grinding resistance and low grinding temperature, the bar will not appear cracks, burns and thermal deformation in the process of powerful grooving grinding wheel.

At the same time, the grinding wheel wear is small, the dressing cycle and service life of grinding wheel can be greatly improved. Application devices include WALTER, ANCA, SAACKE, etc.

Flute grinding is the most difficult feature in round tool manufacturing, whether grinding HSS or cemented carbide. Although there are many reasons, the mainreason is that most of the material is removed from the cutter, introducing maximum heat and spindle load. Grinding wheels consist of thousands of cutting points. The more cutting points are in contact with the grinding part, the more grinding work is segmented. This allows each cutting point to remove a smaller portion. As the surface area increases, this will reduce the force applied to each abrasive grain and allow the abrasive to continue working until it is blunted, or the abrasive falls off. The reduction in chip size also results in finer surface finish of the workpiece and grinding wheel act harder.

Moresuperhard provides a full range of grinding solutions for CNC tool grinding (including flutting, end surface grinding, O.D. grinding, flank grinding…) . For CNC tool grinding, we provide 1A1, 14A1, 1V1, 14V1, 11V9, 12V9 and 6V5 and 12V5 bonded grinding wheel for grinding workpiece position. In the grinding process, the grinding efficiency is high, the feed speed is fast, our grinding wheel has good wear resistance and shape retention, can obtain the perfect grinding quality and finish.

—EDITOR: Doris Hu

—POST: Doris Hu