Curtis Machine Tools has developed the Vector GFS cylindrical grinding machine to cope with components in the 1-2mm diameter range, which are difficult to handle and locate using conventional methods. The Vector GFS (grind from solid) is capable of producing a range of parts from hardened bar in one cycle using a multi-form grinding wheel. The key elements of the design are the stock feed unit, which feeds bar into the work spindle from a magazine located at the rear of the machine, and a puller unit, wherein a servo-driven gripper pulls bar material a precisely programmable distance through the work-spindle chuck.Optional features available on the Vector GFS include the following: servo-feed slitting saw that permits part cut-off with square pip-free faces, regardless of the wheel approach angle; radially retractable tailstock that swings clear to admit the puller gripper; and slimline in-process diameter gauging using the Marposs Nano Unimar gauge, with a retraction system built into the tailstock body. Additional optional features include: two-point steady that can be programmed for fixed support with retraction for stock advance, or linked to the grinding in-feed in follow-down mode; C axis for non-round features; and work-handling systems based on the standard Vector robot, giving the possibility to execute further operations such as deburring, washing and palletisation.
