Processing Case of CBN Grinding Wheel for HSS Annular Cutter

Multi-edge annular cutters are mainly applied in hole machining for steel structures. Their drilling performance far exceeds conventional 2-flute twist drills, featuring high drilling efficiency and effortless cutting during drilling. For manufacturers producing high-speed steel (HSS) annular cutters, machining efficiency is a core concern in production.

Our company’s compound-bond CBN grinding wheels are specially developed for the grinding and manufacturing of HSS annular cutters. The detailed processing parameters are listed below:

• Equipment: Customer self-developed 5-axis CNC tool grinder, spindle power: 20 KW
• Grinding Wheel Specification: Type 1A1, 100×20×10×8 with angle profiling, Grade KAIIB107-A-23
• Cooling Method: Oil cooling
• Workpiece Parameters:
  Annular cutter with outer diameter Φ32 mm, cutting edge length 30 mm, 8 cutting edges, helix angle 35°
• Workpiece Material: M2 High-Speed Steel
• Grinding Technical Parameters:
  Peripheral line speed of grinding wheel: 26.5 m/s
  Grinding depth: 2–2.2 mm
  Feed rate: 280 mm/min
• Single Flute Machining Cycle: 25 seconds per flute
• Wheel Dressing Frequency: Dressing is required after processing approximately 360 pieces of cutters