Method of measurement and apparatus for measurement of tool dimensions
In the machine tool ( 10 ) pertaining to the present invention, the contour lines ( 51 ) of a tool ( 20 ) are displayed on a display screen (S). When an operator measuring the dimensions traces a contour line ( 51 ) on the display screen (S) of a touch panel ( 45 ) with a finger, it is possible to automatically identify, on the display screen (S), the site to be measured (i.e., the contour line ( 51 )) on the tool ( 20 ). In this way, an operator can measure the dimensions of the tool ( 20 ) in an extremely simple manner. Additionally, it is possible to automatically measure the tool diameter or the blade position of the tool ( 20 ) as the operator designates a specific position on the contour line ( 51 ) of the tool ( 20 ). Thus, with such a method for measuring the dimensions of the tool ( 20 ), it is possible to easily identify an unexpected site to be measured on a tool having complex contour lines, such as a multi-stage tool.
1. A method of measurement of tool dimensions which uses an image capture device which moves relative to a tool, attached to a spindle of a machine tool, so as to capture an image of said tool, the obtained image data being used to measure the dimensions of said tool, the method of measurement of tool dimensions, comprising the steps of:
displaying an image including a contour of said tool which was captured by said image capture device on a display screen of the display device,
detecting a plurality of successive teaching points of different positions, designated by touching on said image, by a contact detection device,
specifying a contour line of said tool, extending near said teaching points,
indicating a measurement point on or near the specified contour line, and
specifying a measurement portion of a shape of said tool, measurement direction, or movement direction of said tool based on the specified contour line and the measurement point.
2. The method of measurement of tool dimensions according to claim 1 , wherein in the step of specifying said measurement portion, measurement direction, or movement direction, at least one of a movement path of said tool and a center axial line of said tool is calculated based on the specified contour line.
3. The method of measurement of tool dimensions according to claim 1 , wherein in the step of specifying said measurement portion, measurement direction, or movement direction, a path through said teaching points is calculated based on the detected plurality of successive teaching points, and movement signals are output to move said image based on the calculated path so that a portion of the contour of said tool outside the field of view is moved into the field of view.
4. An apparatus for measurement of tool dimensions which uses image data which was obtained by capturing an image of the tool, attached to a spindle of a machine tool, so as to measure the dimensions of said tool,
said apparatus for measurement of tool dimensions comprising:
an image capture device which captures an image including a contour of said tool,
a display device which has a display screen which displays said image,
a contact detection device which detects a plurality of successive teaching points of different positions designated by touching on said image, and
a processing device for specifying a contour line of said tool, extending near said detected teaching points and specifying a measurement portion of a shape of said tool, measurement direction, or movement direction of said tool based on the specified contour line and a measurement point indicated by touching said contact detection device on or near the specified contour line.
5. The apparatus for measurement of tool dimensions according to claim 4 , wherein said processing device, when specifying said measurement portion, measurement direction, or movement direction, at least one of a movement path of said tool and a center axial line of said tool is calculated.
6. The apparatus for measurement of tool dimensions according to claim 4 , wherein said processing device, when specifying said measurement portion, measurement direction, or movement direction, a path through said teaching points is calculated based on the detected plurality of successive teaching points and movement signals are output to move said image based on the calculated path so that a portion of the contour of said tool outside the field of view is moved into the field of view.