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AssigneeBreton SPA
InventorsGabriele Corletto, Eddy Zen, Luca Toncelli
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A sensing and positioning device (14) adapted to be mounted on a spindle (30) of a machine tool (12), comprising: a fixing element (38); and at least three sensing elements (40A, 40B, 40C) adapted to be connected operationally to a programmable control unit of a machine tool (12). The sensing and positioning device (14) is adapted to be used with a machining tool mounted on the spindle (30). A machine tool (12) comprises a workpiece table (16), a machining head (28), and movement means (18, 20, 22, 24, 26) adapted to move the machining head above the workpiece table (16). The machine further comprises the device described above. An associated machining method is also described.
Sensing and positioning device (14) adapted to be mounted on a spindle (30) of a machine tool (12), comprising:
Device according to any one of the preceding claims, characterized in that said fixing element (38) is a support flange adapted to be fixed onto the front surface of the nose (32) of the spindle (30) at the same time as the machining tool.
Device according to any one of the preceding claims, characterized in that said at least three sensing elements (40A, 40B, 40C) are needle-like feelers, each connected to a transducer adapted to detect the position of the end of each needle feeler.
Machine tool (12) comprising a workpiece table (16), a machining head (28) and movement means (18, 20, 22, 24, 26) which are adapted to move the machining head above the workpiece table (16), said machining head comprising a spindle (30), characterized in that it comprises a sensing and positioning device (14) according to any one of the preceding claims, adapted to be attached to said spindle (30).
Machine according to the preceding claim, characterized in that the sensing device (14) is fixed by means of screws (44) to the front surface (36) of the spindle nose (32).
Machine according to the preceding claim, characterized in that the sensing device (14) comprises an attachment device of the ZPS type.
Method according to the preceding claim, characterized in that, during machining, the surface sensed by the sensing device is compared continuously with the theoretical machining surface.
Method according to the preceding claim, characterized in that, if the divergence between detected surface and theoretical surface is greater than a threshold value, machining is interrupted.
Dependencies are inferred from the claim text.