Correction value measurement method and correction value measurement system of position measurement sensor in machine tool
A technology for measuring sensors and measuring methods, applied in the direction of mechanical measuring devices, measuring devices, mechanical devices, etc., can solve problems such as time-consuming and labor-intensive
Pending Publication Date: 2021-05-11
OKUMA CORP
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Problems solved by technology
[0008] In the method of Patent Document 1, when performing diameter correction of the contact probe, it is necessary to perform a process different from the process of obtaining the probe length by using a reference ball separately as in Patent Document 2, which takes time and effort.
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Embodiment Construction
[0057] Embodiments of the present invention will be described below with reference to the drawings.
[0058] figure 1 It is a way of a machine tool, and it is a schematic diagram of a machining center with three mutually orthogonal translation axes.
[0059] The spindle head 2 can perform a translational two-degree-of-freedom movement with respect to the bed 1 via the X-axis and the Z-axis, which are translation axes and are perpendicular to each other, via the column 4 and the saddle 5 . The table 3 can perform translational motion with one degree of freedom relative to the bed 1 via the Y-axis which is a translational axis and is perpendicular to the X-axis and the Z-axis. Therefore, the spindle head 2 can perform translational motion with 3 degrees of freedom relative to the table 3 . Each feed axis is driven by a servo motor controlled by a numerical control device not shown in the figure. The workpiece is fixed on the table 3, and the tool is installed on the spindle 2...
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A correction value measurement method and a correction value measurement system of a position measurement sensor in a machine tool are provided. After the detection position of a reference cutter and an arbitrary cutter measurement position are acquired using a contact sensor, an arbitrary sensor measurement position is acquired using a contact probe, and the length of the contact probe is determined from the length of the reference cutter and the difference between the cutter measurement position and the sensor measurement position. Then the position of a reference ball is measured by using the contact probe, and calculating the relative position of the reference ball relative to the detection position according to the detection position of the reference cutter, the position of the reference ball, the length of the contact probe and the length of the reference cutter. Then, the position of the reference cutter is acquired using the cutter sensor, the position of the reference ball is measured using the contact probe, a longitudinal correction value of the contact probe is calculated from the position of the reference cutter, the position of the reference ball, the relative position, and the length of the reference cutter, and a radial correction value of the contact probe is calculated using the position and the diameter dimension of the reference ball.
Description
technical field [0001] The present invention relates to a method and a system for measuring a correction value of a position measuring sensor used for measuring the position of a workpiece in a machine tool. Background technique [0002] In a machine tool that processes a workpiece mounted on a table with a rotating tool attached to a spindle, a method of automatically measuring the length of the tool and the position of the workpiece for calibration is used in order to perform high-precision machining. [0003] As an automatic measurement method for the position of workpieces, e.g. used in figure 2 In the touch probe 30 shown, the method of acquiring the coordinates at the time when the tip of the probe comes into contact with the workpiece 31 or at the time taking into account the delay. In this case, in order to acquire the coordinates of the workpiece 31 in the Z-axis direction, the length of the contact probe 30 at the time of contact is required. [0004] As a method...
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IPC IPC(8): B23Q17/09B23Q17/22
CPCB23Q17/09B23Q17/22G01B21/045G01B5/008G05B19/401G05B2219/50063G05B2219/37008G01B11/005
Inventor 神户礼士
Owner OKUMA CORP