Alignment device for adjusting a workpiece on a machine table of a numerically controlled machine tool

Abstract

The present invention relates to an alignment device (100) for adjusting a workpiece (400) on a machine table (300) of a numerically controlled machine tool (1000), the alignment device (100) comprises: a lower plate (20) which can be mounted on the machine table (300) of the machine tool (1000), an upper plate (10) which is movably arranged on the lower plate (20), on the upper side of which a workpiece carrier (200) can be mounted, an adjusting mechanism which is arranged between the lower plate (20) and the upper plate (10) for adjusting the relative position of the upper plate (10) to thelower plate (20), and a locking mechanism for securing the relative position of the upper plate (10) to the lower plate (20).

Description

Technical field[0001]The present invention relates to an alignment device for adjusting the workpiece on the machine table of the CNC machine tool. The invention also relates to a method of aligning the workpiece on the machine table of the CNC machine.[0002]Inventory background[0003]The adjustment device for the workpiece in the machine tool (,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, This offset may, for example, the workpiece must be re-clamped, and thus loses the relative position of the workpiece relative to the original settings of the machine table.[0004]A positioning device is described in DE 10 2007 020 633 B4, which has a substrate and an output of the workpiece in front of the matrix relative to the longitudinal axis. Further, the positioning apparatus includes a connecting element connected to the substrate and extends along the longitudinal axis and at least two eccentric actuators that are fixed to the substrate and act on the longitudinal axis, particularly an eccentric piezoe...

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Problems solved by technology

[0007] However, these two known adjustment devices have the disadvantage that their protruding structure creates a considerable distance between the machine table and the workpiece to be machined, because the eccentric disk and the mechanical structure with the piezoelectric actuator Takes up a lot of space, where, in terms of machining accuracy, it is advantageous if the workpiece to be machined is as close as possible to the machine table

[0008] Furthermore, DE 10 2007 020 633 B4 states in particular that the load on the workpiece must always be maintained by means of the adjustment mechanism in order to only partially provide fixation of the adjusted position of the workpiece relative to the machine table and depends on the relative center of gravity of the workpiece and the holding device The position of the machine tool table will cause changes in the original adjustment position

[0009] In particular, this is disadvantageous because it leads to machining errors in the workpiece, which can only be detected or measured to a limited extent during machining and usually only become visible after machining has been completed

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