Präzisionsbohrsystem mit hoher Geschwindigkeit

摘要

A high speed system (50) for drilling of very small holes in workpieces (137) such as printed circuit boards. The system (50) includes a conventional spindle (85) and a high speed spindle (81). The high speed spindle (81) includes a stationery body (156) carrying the stator (195, 196) of the drive motor. Only the spindle rotor (160) is translated along the Z axis to perform drilling movements. The rotor (160) is supported within the body (156) by rotary and linear air bearings (179, 187), and is axially driven by a linear motor (210, 220). A tool changer (95) loaded by clips (350) carrying the drilling bits (400) is mounted on the top work table (70). A high leverage centrifugal chuck assembly is provided for gripping a drill bit in the high speed spindle (81).