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MACHINING STATE CHECKING METHOD AND MACHINING STATE CHECKING APPARATUS

  • US 20100063617A1
  • Filed: 09/03/2009
  • Published: 03/11/2010
  • Est. Priority Date: 09/05/2008
  • Status: Active Grant
First Claim
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1. A machining state checking method for checking, in a machine tool machining a portion to be machined of a workpiece fixed by a workpiece fixture to form a predetermined machining shape on the workpiece, whether the workpiece or the workpiece fixture is shifted, or whether the predetermined machining shape is formed by machining, the machining state checking method comprising:

  • an actual image generating step of imaging a pre-machined workpiece, workpiece having the predetermined machining shape formed thereon, or the workpiece fixture, which are fixed on the machine tool, by means of actual imaging means from a predetermined view point, and generating actual two-dimensional image data thereof;

    a virtual image generating step of generating virtual two-dimensional image data of the workpiece, workpiece fixture, or machining shape of the workpiece, based on data on a three-dimensional model of the workpiece or workpiece fixture, the virtual image generating step in which;

    a three-dimensional space is virtually set;

    three-dimensional model of the workpiece including the machining shape, three-dimensional model of the workpiece excluding the machining shape, three-dimensional model of the workpiece fixture, or three-dimensional model of the machining shape of the workpiece is arranged in the virtual three-dimensional space, and simultaneously imaging means having the same condition as that of the actual imaging means is virtually set and arranged; and

    then virtual two-dimensional image data which is assumed to be obtained when the workpiece, workpiece fixture, or machining shape is imaged by the virtual imaging means from the same view point as that of the actual imaging means, is generated; and

    a comparing step of comparing the actual two-dimensional image data and virtual two-dimensional image data generated in the actual image generating step and the virtual image generating step, respectively, the comparing step of comparing the portion corresponding to the workpiece, workpiece fixture, or machining shape in the actual two-dimensional image and the virtual two-dimensional image of the workpiece, workpiece fixture, or machining shape of the workpiece, and determining whether they match each other.

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