JP2011123040A - Tool inspection method and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool inspection method and device, measuring easily, quickly, and precisely, even if the axial line of a tool to be measured is not coaxially connected to the axial line of a chuck part to which the tool is connected and rotated by a driving means, relating to measurement of a grinding tool having a complex profile such as an end mill and twist drill. <P>SOLUTION: The tool inspection method includes: a step in which a shank part of a tool to be measured is pinched for rotation by a tool support device and a tool pressurizing device without sway of axial line of the shank part; a step in which the tool is detachably connected to a driving means for rotating the tool through a yielding shaft coupling; a step in which the driving means is driven to rotate the tool that is pinched between the tool support device and the tool pressurizing device; and a step of measuring by non-contact manner a desired portion such as an outer diameter of the rotating tool. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an inspection device for a tool that rotates an end mill or the like to cut a workpiece.

  A tool measuring device capable of measuring a plurality of dimensions and shape accuracy of a turning tool having a complicated shape such as an end mill, a ball end mill, a twist drill, etc. easily, quickly and with high accuracy by a single setup. It is disclosed in the gazette. Here, the tool 24 to be measured is attached to the work spindle 20 via the chuck 22. The work spindle 20 is rotatable around a predetermined axis, but is fixed so as to be inoperable in the longitudinal direction along the coaxial line. On the other hand, the transmission type laser measuring devices 42 and 44, the microscope 30, and the electric micrometer as measuring means are on the tables 6, 12, and 16 configured to be movable in the X-axis, U-axis, and Y-axis directions. It is fixed to. Accordingly, the size and shape of each part of the tool 24 to be measured are measured by rotating the tool 24 to be measured around the rotation axis or by moving each table in the X, U-axis and Y-axis directions and measuring the movement distance. It is configured to measure accuracy.

This technique has the advantage that the tool to be measured can be measured with high accuracy because the tool to be measured can be rotated around the axis, but is not operable in the longitudinal direction along the coaxial line and there are few movable parts. is there.
However, if foreign matter such as dust enters the minute gap between the holding surface of the tool to be measured and the measuring tool holding surface of the chuck, the tool to be measured is a chuck concentric with the measurement reference axis A as shown in FIG. When the chuck is rotated while being tilted with respect to the axis, the tool to be measured rotates in an inclined state with respect to the measurement reference axis (spindle axis), so that there is a drawback that accurate measurement cannot be performed.
JP-A-6-109440

  The present invention has been made based on the background as described above. In measurement of a turning tool having a complicated shape such as an end mill or a twist drill, the axis of the tool to be measured and the tool to be measured are connected and rotated by a driving means. It is an object of the present invention to provide a tool inspection method and apparatus capable of measuring easily, quickly, and with high accuracy even if the chuck part axis to be moved is not coaxially connected.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  In the tool inspection method according to claim 1, the axis of the shank portion can be swung with respect to the shank portion of the tool to be measured by the tool to be measured and the tool pressing tool to be measured which can be moved close to and away from the tool support. And a step of detachably connecting the tool to be measured and a driving means for rotating the tool to be measured via a flexible shaft coupling, and a tool to be measured by driving the driving means. The method includes a step of rotating a tool to be measured sandwiched between a support tool and a tool pressing tool to be measured, and a step of measuring a required portion such as an outer diameter of the rotating tool in a non-contact manner.

  The tool inspection apparatus according to claim 2 includes a base, a measured tool support having a V-shaped groove that is detachably positioned and attached to the upper surface of the base, and a top side that is open, and a V that is open on the ground side. The V-shaped groove and the V-shaped groove can hold the shank portion of the measured tool so that the shank portion can be rotated without swinging the axis of the shank portion. A tool to be measured that can be measured, a motor that is disposed on the upper surface of the base and has a rotatable output shaft extending toward the tool to be measured, a flexible shaft coupling that is coupled to the output shaft, A chuck that is connected to the flexible shaft coupling on one side and is capable of holding the tool to be measured on the other side facing it, and a workpiece that is disposed on the upper surface of the base and is clamped by the tool to be measured and the tool to be measured to be measured. A laser measuring instrument that can measure the required part of the measuring tool in a non-contact manner. The one in which the features.

  As effects of the present invention, the following effects can be obtained.

  The tool to be measured and a driving means for rotating the tool to be measured are connected via a flexible shaft joint, and the shank portion of the tool to be measured is connected to the tool to be measured and the tool pressing tool to be measured by the axis of the shank portion. A chuck that holds the flexible shaft joint and the tool against the shank part axis of the tool to be measured by rotating the flexible shaft joint by driving the drive means in a state where it can be pivoted without swinging. Even if the axes are not aligned, the error is absorbed, so that the shank portion of the tool to be measured rotates coaxially with the measurement reference axis without the axis moving. Thereby, the outer diameter, runout, and the like of the tool blade portion to be measured can be accurately measured.

A tool inspection method and apparatus according to the present invention will be described with reference to FIGS.
The feature of the present invention is that, while the conventional tool inspection apparatus has the measurement reference axis of the tool to be measured on the chuck side holding the tool, the shank portion of the tool to be measured becomes the measurement reference axis. It is in the point.

A rail 2 is attached to the upper surface of the base 1, and a slider 3 is attached to the rail 2 so as to be able to advance and retreat on the rail 2 and to stop at an arbitrary position. A motor 4 is attached to the upper surface of the slider 3 so that an output shaft 4a that is rotatable is extended horizontally.
A chuck 6 is connected to the output shaft 4a via a flexible shaft coupling 5. The chuck 6 has a small-diameter portion 6a on one side connected to the half body 5c of the flexible shaft coupling 5, and a tool 15 to be measured can be detachably held on the opposite side. In the flexible shaft coupling 5, a half body 5a to which the output shaft 4a is detachably connected and a half body 5c to which the small diameter portion 6a of the chuck 6 is detachably connected are connected via a flexible elastic member 5b such as rubber. .

  Further, when the motor 4 is moved to the forward end of the slider 3 (the right end side of the rail in the figure), the tip of the chuck 6 attached to the output shaft 4a is separated so as not to interfere, and the upper surface of the base 1 is projected. A measured tool support 8 having a V-shaped groove whose top side is opened on the portion 7 is detachably positioned and attached, and has a V-shaped groove whose ground side is opened toward the measured tool support 8. The shank portion 15a of the tool 15 to be measured can be held between the V-shaped groove of the tool support 8 to be measured and the V-shaped groove so that the shank portion 15a can be pivoted without swinging the axis of the shank portion 15a. A mounting plate connected to the tip of a rod 10a that moves up and down by compressed air flow into and out of an air cylinder 10 with a guide attached to an inverted L-shaped leg 9 on which the measuring tool pressing tool 11 is attached to the upper surface of the base 1 Mounting via 10b It has been.

  Further, a laser micrometer can be measured via the measured tool 15 so that a required portion of the measured tool 15 sandwiched between the measured tool support 8 and the measured tool pressing tool 11 can be measured in a non-contact manner on the upper surface of the base 1. The light emitting side half 12 and the light receiving side half 13 are disposed to face each other.

The operation of the above configuration will be described.
As shown in FIGS. 1 and 2, the tool to be measured 15 is held by the chuck 6 and the shank portion 15 a faces the V-shaped groove of the tool support 8 to be measured, and then compressed air is supplied to the air cylinder with guide 10. Then, the rod 10a is extended downward, and the shank 15a is sandwiched between the V-shaped groove carved in the measured tool pressing tool 11 and the V-shaped groove of the measured tool support tool 8.

  Subsequently, when the motor 4 is driven to rotate the output shaft 4 a, the tool 15 to be measured rotates via the chuck 6. At this time, the V-shaped groove of the tool support tool 8 to be measured is engraved so that the measurement reference shaft 14 spaced apart from the upper surface of the base 1 with a predetermined interval H and the shank portion axis line coincide with each other. Always rotates around the measurement reference axis 14.

By the way, for example, when the tool 15 to be measured is attached so that the axis intersects the chuck 6, the shaft of the shank portion 15a is forced to be coaxial with the measurement reference shaft 14 and rotated as shown in FIG. However, the chuck 6 rotates in an inclined state with respect to the measurement reference axis 14. The deflection at this time is absorbed by the flexible elastic member 5b of the flexible shaft coupling 5 being elastically deformed, so that the output shaft 4a can rotate normally, and the rotation is transmitted to the tool to be measured.
Even if foreign matter such as dust enters the contact portion between the shank portion 15a and the measured tool support 8 or the measured tool pressing tool 11, the shank portion 15a is pressed against the contact surface with a certain force and rotated. Therefore, the foreign matter is instantaneously removed from the contact portion, and the axis of the shank portion 15a is coaxial with the measurement reference axis.

    Thus, when a laser beam perpendicular to the axis of the shank portion 15a is projected from the laser micrometer onto the main portion of the blade portion 15b of the tool 15 to be measured, the blade extends from the shank portion 15a and rotates in synchronization. The outer diameter, runout, cylindricity, straightness, taper degree, back taper, etc. of the part 15b are accurately measured.

  The flexible shaft coupling is not limited to this embodiment, and other commercially available ones may be used. In short, even if the other side axis (measurement tool axis) is eccentric or intersects with one side axis (drive means side), any structure can be used as long as it can absorb this and transmit rotational motion. It may be a thing.

Further, in this embodiment, when the shank portion 15a of the tool 15 to be measured is supported by the V-shaped groove of the tool support 8 to be measured, the axis of the shank portion 15a is always at a constant distance H from the upper surface of the base 1 as shown in FIG. It is made to be supported at the position of.
Accordingly, when measuring a tool to be measured having a shank portion larger than the outer diameter of the shank portion 15a in FIG. 1, the tool-supporting tool in which the V-shaped groove is carved deeper than that in FIG. In the case of the tool to be measured, the tool to be measured is replaced with a tool to be measured in which V-shaped grooves are shallowly carved.

  The structure of the above embodiment is carried out in order to reduce the manufacturing cost, and is not limited to this embodiment. For example, as shown in FIG. 5, a precision screw 20 extending from a bulging portion 20 a where a part of the outer peripheral surface is exposed from the side surface of the tool support tool 18 is loosely fitted to the tool support tool 18 and the screw 20 is screwed perpendicularly to the upper surface of the base 1 and guide shafts 19, 19 extending upward from the upper surface of the base 1 are passed through the tool support 18 to be measured and the bulging portion 20 a is rotated. The measuring tool support 18 may be moved up and down while being guided by the guide shaft 19. As a result, the position of the axis of the tool to be measured with different shank part outer diameters can be matched to the constant interval H simply by moving one tool tool to be measured 18 in which the depth of the V-shaped groove is defined in the vertical direction. Therefore, there is an effect that the storage management place and replacement time of the tool support to be measured can be saved.

  Used for measuring the outer diameter, runout, cylindricity, straightness, taper, back taper, etc. of turning tools such as end mills, ball end mills and twist drills.

  It is a side view which shows the Example of this invention.

  It is a B arrow line view of FIG.

  It is explanatory drawing which shows the effect | action of the tool inspection apparatus of this invention.

  It is explanatory drawing which shows the fault of a prior art.

  Another embodiment showing the vertical movement structure of the tool support to be measured

DESCRIPTION OF SYMBOLS 1 Base 2 Rail 3 Slider 4 Motor 5 Deflection shaft coupling 6 Chuck 8 Measuring tool support 9 Leg part 10 Guided air cylinder 11 Measuring tool pressing tool 12 Laser micrometer projecting side half 13 Laser micrometer receiving side Half 14 Rotation reference axis 15 Tool to be measured

Claims (2)

  A step of clamping the shank portion of the tool to be measured so as to be rotatable without swinging the axis of the shank portion between the tool support to be measured and a tool pressing tool to be measured which can be moved close to and away from the tool support to be measured; A step of detachably connecting a tool to be measured and a driving means for rotating the tool to be measured via a flexible shaft coupling; and a tool to be measured and a tool to be measured to be measured by driving the driving means. A tool inspection method comprising a step of rotating a clamped tool to be measured and a step of measuring a required part such as an outer diameter of the rotating tool in a non-contact manner.   A measurement tool support having a base, a V-shaped groove that is detachably positioned on the upper surface of the base and is open on the top side, and the measurement tool support having a V-shaped groove that is open on the ground side A tool-to-be-measured tool that can be moved close to and away from the tool, and can be held between the V-shaped groove and the V-shaped groove so that the shank of the tool to be measured can be pivoted without swinging the axis of the shank. A motor with a rotatable output shaft disposed on the top surface and extending toward the tool support to be measured, a flexible shaft joint connected to the output shaft, and one side connected to the flexible shaft joint and facing each other. Non-contact measurement of the required part of the tool to be measured held between the chuck that can hold the tool to be measured on the other side, and the tool support tool to be measured and the tool tool to be measured disposed on the upper surface of the base Tool inspection apparatus comprising a laser measuring device capable of

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