Cylindrical grinding machine PG3B

automaticcontinuouslapping

Mono Crystal Diamond (MCD) is the term usually used when referring to synthetic single crystals of diamond made by high pressure, high temperature (HPHT) techniques. The crystals are typically slightly yellow rather than white/transparent in colour. These crystals require machines for lapping, grinding and polishing into cutting tools, wire drawing dies, dressers and heat spreaders for example. The PG3B has air bearings for both the pivot and the water cooled wheel spindle. The machine is designed for making: • Low or controlled waviness, radius tools • Multiple facet tools, conical tools The pivot motion is automatic and controlled via a touchscreen. Pivot angle limits, dwell time at end of stroke and pivot speed can all be pre-set. If ‘hard’ spots exist on the diamond then temporary pivot limits can be selected whilst running. Tools are inspected via a VS5G vision system. Main motions Wheel spindle Air bearing Speed 0 – 12,000 rpm Spindle direction Clockwise and Anti-clockwise Spindle tilt 0 – 20 degrees Stroke length 0 – 28 mm Pivot spindle Air bearing Pivot range 182 degrees (+/- 91 deg) Planetary motion Continuous/jog Planetary direction Clockwise and Anti-clockwise Work range Maximum radius 75 mm Conical clearance 0-20 degrees Cylindrical clearance 0-20 degrees Main Options Rotary fixture – CF13 Metal bond or cast iron laps