Patent ID: 6109840
Filing Date: 2000-08-29
Classification: B23Q,G05B,H05K,Y10T

Abstract:
A device for automatically aligning a workpiece on a table of a machine tool, wherein the workpiece is fitting to a clamping fixture carried by said table to be machined by a machining head, said head and said table being movable with respect to each other along two coordinate axes, said workpiece being defined by a pack of printed circuit boards, each said pack having two locating pins and two locating elements, said fixture being provided with a locating member for clamping one of said pins, and with a pair of bars, one of said bars being movable towards the other bar to clamp one of said pins, said locating member and one of said bars being movable on said fixture by means of actuators, said machining head carrying an optoelectronic sensor for determining the real position of each of said elements, a control circuit being responsive to said sensor for controlling said actuators so as to align said real position of said pack to a predetermined position, wherein said locating member is carried by a slide movable along one of said coordinate axes X, Y; said slide being guided by a shift member movable along a first inclined surface with respect to said coordinate axes X, Y; a first of said bars being movable along a second inclined surface with respect to said coordinate axes X, Y; and said inclined surfaces determining a component of movement of said locating member and said first bar along the other of said coordinate axes X, Y.