Patent ID: 6231279
Filing Date: 2001-05-15
Classification: B23B,H05K,Y10T

Abstract:
A drilling machine having at least two machining heads for machining printed circuit boards, comprising:a work table movable along a base in a first direction (Y);a cross member fitted to said base;at least two carriages supporting said two machining heads, each one of said carriages being slidable along said cross member in a second direction (X) perpendicular to said first direction (Y);at least two screw-nut screw pairs associated with said at least two carriages, each one of said pairs including a screw-nut secured to the associated carriage and a screw rotatably supported by said cross member parallel to said second direction (X), each one of said screws being rotated by a corresponding reversible electric motor controlled by a numerical control unit;at least one of said machining heads being movable with respect to the corresponding carriage in said first direction (Y);a slide fitting said at least one machining he ad;at least two prismatic guides secured to said corresponding carriage parallel to each other and to said first direction (Y);at least two pads carried by said slide and slidable on said prismatic guides; andat least a further screw-nut screw pair mounted between said slide and said corresponding carriage and including a further screw parallel to said first direction (Y), said further screw being rotated by a further reversible electric motor operated by said numerical control unit for moving said slide in said first direction (Y).