JP2006159315A - Measuring device for object to be measured of grinding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small and inexpensive measuring device for an object to be measured of a grinding machine mountable on the machine. <P>SOLUTION: A support base 1 is composed of a housing bracket 11 fixed to a grinding machine body, a housing 12 mounted to the housing bracket 11, a turning shaft 13 turnably supported on the housing 12, and an oscillating arm 14 extended from the tip end of the turning shaft 13 in the radial direction. An irradiation part 21 and a light receiving part 22 of a laser measuring machine 2 are disposed on the tip end of the oscillating arm 14. The measuring device is provided with a crank 15, a cylinder 16 connected with it, and a stopper 17 stopping the oscillation of the crank 15 at the base end side of the turning shaft 13 to allow the laser measuring machine 2 to advance and retract from the measuring position of the object to be measured. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an object measuring apparatus used for a grinding machine such as a tool grinder, and more particularly to an object measuring apparatus for a grinding machine using a laser measuring machine.

  In the machine tool industry, laser measuring machines are widely used as means for measuring the shape, outer diameter, and the like (hereinafter referred to as shape) of an object to be measured such as a tool or a workpiece. The laser measuring device includes a laser light irradiation unit, a light receiving unit, and a control unit that controls them, and can measure the shape by receiving the laser light emitted from the irradiation unit by the light receiving unit. For example, a workpiece measuring apparatus for a centerless grinding machine described in Patent Document 1 has a laser measuring machine arranged in the middle of a roller conveyor, and the workpiece is measured while the ground workpiece is conveyed by the roller conveyor. The outer diameter is continuously measured online by irradiating laser light from the direction. However, in this workpiece measuring device, the distance between the grinding machine that processes the workpiece and the laser measuring machine is wide, so the roller conveyor becomes long and the entire device becomes large. However, there is a disadvantage that the defective product can only be repelled because it is impossible to reversely correct the workpiece even when it is necessary.

  When a laser measuring machine is mounted on a machine tool in order to solve the above-mentioned drawbacks and make the apparatus compact, a laser measuring machine is arranged in the vicinity of the machine part provided with the tool, It is necessary to measure the shape before and after processing. However, when the machine part and laser measuring machine are brought close to each other, the laser measuring machine gets in the way when machining the workpiece, and the machine part cannot be brought close to it, and the machine part gets in the way when measuring the shape and the laser measurement is made. This causes a problem that the measuring unit of the machine cannot be brought close to. In order to avoid such a problem, it is necessary to move the laser measuring machine to a position where it does not interfere with the machine elements of the machine part by sliding the laser measuring machine. Further, since the laser measuring machine is also an optical instrument, it is necessary to separate it from the work part as much as possible from the viewpoint of dust-proof measures.

However, when the laser measuring machine is mounted on a linear guide rail and slidably moved, it can measure the object under measurement at any position within the moving range with little disturbance in posture. However, high precision is required for positioning the laser measuring machine, so a high-precision control device is required, equipment costs increase, and a large space is required to accommodate the measurement system. The problem of becoming. Therefore, it was very difficult to mount a laser measuring machine on the machine.
Japanese Utility Model Publication No. 4-48926 (Fig. 1)

  The present invention has been made in order to solve the above-described conventional problems and to provide a small-sized and inexpensive object measuring device for a grinding machine that can be mounted on a machine.

  An object measuring machine for a grinding machine according to the present invention, which has been made to solve the above-mentioned problems, rotatably supports a rotating shaft provided on the grinding machine and having a swing arm extended at the tip. It comprises a support base and a laser measuring device provided at the tip of the swing arm, and the laser measuring device can be moved back and forth from the measurement position of the object to be measured by swinging in the direction perpendicular to the rotation axis. It is what. In addition, the rotation of the rotation shaft can be a motor drive system or a cylinder drive system that rotates via a crank, and the rotation of the rotation shaft is stopped on the support base and the laser measuring machine is stopped. A stopper can be provided for positioning the at the measurement position. Furthermore, a tool grinder can be used as the grinder.

  The object measuring machine of the grinding machine according to the present invention enables the laser measuring machine to move forward and backward with respect to the object set at the measurement position of the grinder by swinging the swing arm, so that the grinder is covered. When processing the measurement object, the measurement object can be processed by retracting the laser measuring machine and advancing the tool. When measuring the shape of the object to be measured, the shape of the object to be measured can be measured by retracting the tool and advancing the laser measuring machine. Therefore, since it is possible to perform processing and shape measurement of the object to be measured at the same site, it is not necessary to move the object to be measured. The entire facility can be downsized with the required space as small as possible. Since the laser measuring machine is retracted during processing, there is an advantage that contamination of the laser measuring machine can be reduced.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
4 and 5 are views showing a grinding machine equipped with a device for measuring an object according to the present invention, wherein 51 is a grinding machine body, 52 is an NC control panel, and 53 is an object measuring device. In the figure, an object measuring device 53 includes a support base 1 fixed to an upper portion of a grinding machine main body 51 and a laser measuring machine 2 provided on the support base 1.

  Details of the DUT 53 are shown in FIGS. The support base 1 includes a housing bracket 11, a housing 12, a rotation shaft 13, and a swing arm 14. The housing bracket 11 is fixed to the upper portion of the grinder main body 51, and the housing 12 is attached to the housing bracket 11. The housing 12 is hollow, and a horizontal rotating shaft 13 is supported by a bearing 18 inside. A swing arm 14 extends in a radial direction perpendicular to the pivot shaft 13 at the tip of the pivot shaft 13, and an irradiation unit 21 and a light receiving unit 22 of the laser measuring machine 2 are disposed at the tip of the swing arm 14. Has been deployed.

  A crank 15 that is eccentrically attached to the rotating shaft 13 and a cylinder 16 that is connected to the crank 15 are provided on the proximal end side of the rotating shaft 13. Since the crank 15 converts the linear motion of the cylinder 16 into rotational motion, the rotation shaft 13 can be rotated by driving the cylinder 16 and the laser measuring machine 2 can be swung around the axis a. The power source of the cylinder 16 may be pneumatic or hydraulic. Further, instead of the cylinder 16, an actuator such as a motor that rotates can be used directly or indirectly. Since no particular precision is required for the dynamic accuracy of the rotation, an actuator having the minimum necessary performance capable of rotating the rotation shaft 13 can be used.

  The housing bracket 11 is provided with a stopper 17 so that the rotation angle of the rotation shaft 13 is controlled by the crank 15 coming into contact with the stopper 17. Can be stopped. While the crank 15 is in contact with the stopper 17, the shape of the workpiece W is measured by the laser measuring machine 2. During measurement, the shape of the workpiece W is measured so that the crank 15 is stably in contact with the stopper 17. It is desirable to leave the torque applied to the moving shaft 13.

  The positional relationship between the stopper 17 and the crank 15 can be set as shown in FIG. 3, for example. In this figure, an auxiliary arm 19 for facilitating the rotation is integrally fixed to the rotation shaft 13. One end of the crank 15 is pivotally attached to the tip of the auxiliary arm 19, and the other end of the crank 15 is pivotally attached to the cylinder 16. A stopper 17 projects from a required position of the support base 1. With this configuration, the movement of the crank 15 is stopped when the auxiliary arm 19 comes into contact with the stopper 17, so that the rotation of the rotating shaft 13 can always be stopped at a constant angle. The same effect can be obtained by providing the stopper 17 on the side of the swing arm 14 of the housing bracket 11 and stopping the swing of the swing arm 14 by the stopper 17.

  Further, fine adjustment of the position of the laser measuring device 2 can be performed by making it possible to adjust the fixing position of the stopper 17 with a screw or the like. In general, the position accuracy of the laser measuring machine 2 at the time of measurement is required to be equal to or higher than the shape accuracy of the workpiece W. In this way, the position of the stopper 17 can be finely adjusted. Thus, it is possible to easily cope with such a demand for high positional accuracy. Further, it is possible to flexibly cope with a decrease in accuracy due to wear of the stopper 17 by readjustment.

  In the configuration as described above, the workpiece W held by a jig or the like is set at the measurement position of the grinding machine. When the rotating shaft 13 is rotated by the cylinder 16, the retracted laser measuring machine 2 is swung. However, since the stopper 17 stops the movement of the crank 15, the laser measuring machine 2 is moved to a predetermined position. Can be positioned and set correctly. At this time, the object to be measured W is positioned between the irradiation unit 21 and the light receiving unit 22, so that the shape of the object to be measured W can be measured by the laser measuring machine 2.

  As a result of the measurement, when an abnormality is recognized in the shape and correction is required, the laser measuring machine 2 is retracted by turning the rotating shaft 13 in the reverse direction to retract the laser measuring machine 2. Move outside the area of interference with the machine element. Then, the tool is brought into contact with the workpiece W held in the state at the time of measurement by advancing the work section such as a holder on which the tool is mounted, and the shape of the workpiece W is corrected. Can do. After the correction, a space for setting the laser measuring machine 2 can be secured by retracting the machine part. Therefore, the corrected shape can be measured by rotating the laser measuring machine 2 again and setting it at the measurement position. The workpiece W that has passed as a result of finishing the measurement is sent to the next process.

  In the above description, the embodiment has been described in which the rotating shaft 13 is supported horizontally and the laser measuring device 2 is swung in the vertical direction. However, the rotating shaft 13 is vertical and the laser measuring device 2 is moved horizontally. Needless to say, it can be swung. The device under test of the present invention can also be used when the device under test W is a tool for processing a workpiece, for example, for measuring the shape of a tool edge. That is, the device for measuring an object of the present invention can be mounted on a tool grinder.

  As described above, the object measuring machine of the grinding machine according to the present invention can perform processing and shape measurement of the object to be measured at the same part of the machine tool, so there is no need to move the object to be measured. . By making the required space as small as necessary, the entire facility can be reduced in size and cost. At the time of processing the object to be measured, the laser measuring machine can be separated from the part, so that contamination of the laser measuring machine due to scattering of processing waste can be suppressed to a small one. Therefore, it has a great advantage that the number of maintenance of the laser measuring machine and the frequency of failure can be reduced.

It is a front view of the to-be-measured object measuring apparatus of the grinding machine which concerns on this invention. It is a side view of the to-be-measured object measuring apparatus shown in FIG. It is a schematic block diagram which shows the positional relationship of a stopper and a crank. It is a front view of the grinding machine provided with the to-be-measured object measuring apparatus based on this invention. It is a side view of the grinding machine provided with the to-be-measured object measuring apparatus based on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support base 11 Housing bracket 12 Housing 13 Rotating shaft 14 Swing arm 15 Crank 16 Cylinder
17 Stopper 18 Bearing 2 Laser measuring machine 21 Irradiation unit 22 Light receiving unit 51 Grinding machine body 52 NC control panel 53 Device for measuring object to be measured

Claims (4)

  It comprises a support base that is provided on a grinding machine and rotatably supports a rotating shaft having a swing arm extended at the tip, and a laser measuring machine provided at the tip of the swing arm, and laser measurement. An apparatus for measuring an object to be measured on a grinding machine, characterized in that the machine can be moved back and forth from the measurement position of the object to be measured by swinging the machine in a direction perpendicular to the rotation axis.   2. The measuring object measuring apparatus for a grinding machine according to claim 1, wherein the rotation of the rotation shaft is a motor drive system or a cylinder drive system that is rotated via a crank.   2. The measuring object measuring device for a grinding machine according to claim 1, wherein the support base is provided with a stopper for stopping the rotation of the rotating shaft and positioning the laser measuring machine at the measurement position. The device for measuring an object to be measured of a grinding machine according to any one of claims 1 to 3, wherein the grinding machine is a tool grinding machine.

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