Patent ID: 6109137
Filing Date: 2000-08-29
Classification: B23D,B24B

Abstract:
A machine for machining workpieces (10) which have cutting teeth (12), especially saw blades, comprisinga machine bed (20) on which a pivot axis (A) is fixed, first and second reference planes (B, C) intersecting on said pivot axis,a pivot body (22) which is adapted to swing about the pivot axis (A) and defines a lift axis (D) extending transversely of the pivot axis,a reciprocating slide (24) which is guided on the pivot body (22) for reciprocating along the lift axis (D),a saddle (26) which defines a spindle axis (E) extending transversely of the lift axis (D) and is guided on the reciprocating slide (24) for infeeding motion,a tool spindle (28) which is supported on the saddle (26) so as to be driven in rotation about the spindle axis (E) and is adapted to receive a rotationally symmetric tool (30),a workpiece slide (42) which is guided on the machine bed (20) for traversing transversely of the first reference plane (B) and which defines a central plane (G), at right angles to the pivot axis (A), together with a workpiece support (44) formed integrally with the workpiece slide (42),an advance means (50) including an advance finger (58) adapted for intermittent engagement with a respective cutting tooth (12) of a workpiece (10) retained on the workpiece support (44) SO as to advance the same, anda means for control of movements of the saddle (26), the workpiece slide (42), and the advance finger (58),characterized in thata common feeler (70) is provided to determine the distance of the cutting teeth (12) of the workpiece (10) from the workpiece support (44) and also to determine at least one measurable variable which reflects the condition of wear of the tool (30) or of the advance finger (58), said feeler (70) being movable from a retracted, inactive position into a measuring position in the vicinity of point (H) at which the pivot axis (A) passes through the central plane (G), andthe control means is designed to convert the measured data into signals for controlling the workpiece slide (42) and the saddle (26) and/or the advance means (50).