JP2010101740A - Shaft workpiece measuring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaft workpiece measuring apparatus capable of effectively measuring outer diameters of a workpiece cut into a stepped shaft shape at multiple positions in the axis direction. <P>SOLUTION: A shaft workpiece measuring apparatus 11 measures an outer diameter of a workpiece W1 cut into a stepped shaft shape and includes: a workpiece supporting base 12 for supporting the workpiece W1 in a predetermined attitude; a non-contact sensor device 13; and a sensor moving mechanism 14. The non-contact sensor device 13 measures an outer diameter of the workpiece W1 supported on the workpiece supporting base 12 by a sensor part 24 without contact. The sensor moving mechanism 14 relatively moves the sensor part 24 of the non-contact sensor device 13 along the axis direction to the workpiece W1 on the workpiece supporting base 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a shaft workpiece measuring device that measures the outer diameter of a workpiece cut into a stepped shaft shape by a lathe or the like.

As this type of shaft workpiece measuring device, there is known a device that measures the outer diameter dimension in contact with the outer diameter surface of the workpiece using a touch sensor or a differential transformer type contact displacement measuring device. ing.
JP 2007-111782 A

  However, the contact-type shaft workpiece measuring device as described above has a problem that it takes time to measure and is inefficient. In particular, it takes too much time to measure a plurality of locations.

An object of the present invention is to provide a shaft work measuring device capable of efficiently measuring the outer diameter dimensions at a plurality of positions in the axial direction of a work cut into a stepped shaft shape.
Another object of the present invention is to enable high-speed and accurate detection with a sensor unit having a simple configuration.
Still another object of the present invention is to enable easy measurement of each part of a stepped shaft-shaped workpiece having a plurality of steps.

A shaft workpiece measuring device according to the present invention is a shaft workpiece measuring device for measuring an outer diameter dimension of a workpiece cut into a stepped shaft shape, the workpiece supporting base for supporting the workpiece in a fixed posture, and the workpiece A non-contact sensor device that measures the outer diameter of a work supported on a support table in a non-contact manner by a sensor unit, and the sensor unit of the non-contact sensor device is axially relative to the work on the work support table. And a sensor moving mechanism for moving the sensor.
According to this configuration, the outer diameter of the workpiece is non-contacted by the sensor unit by moving the sensor unit of the non-contact sensor device relative to the workpiece supported on the workpiece support base by the sensor moving mechanism in the axial direction. Measure with Therefore, it is possible to efficiently measure the outer diameter dimensions at a plurality of positions in the axial direction of the workpiece cut into the stepped shaft shape.

In the present invention, the non-contact sensor device is installed on one side of the work supported by the work support base, and irradiates a band-shaped light in a direction in which the band width direction is perpendicular to the work center, A sensor unit that is installed on the opposite side of the projector and receives the band light irradiated by the projector and can detect a range blocked by the workpiece of the band light, and the output of the workpiece from the output of the receiver It is good also as what has an output processing part which calculates | requires and outputs an outer diameter value.
When band-like light is used in this manner, for example, high-speed measurement can be performed with a simple configuration as compared with a sensor that scans a laser beam. Further, since it is a transmissive type, detection with higher accuracy can be performed with a simple configuration compared to the reflective type.

In this invention, the said non-contact sensor apparatus has a measurement position setting part which obtains the output of the said light receiver of the said sensor part in the some measurement position in the axial direction of the workpiece | work on the said work support stand, The said output process part May obtain and output the outer diameter values at a plurality of positions of the workpiece corresponding to each measurement position from the output of the light receiver measured at each measurement position.
As described above, when the measurement position setting unit is provided and the outer diameter value is output from the output of the light receiver measured at each measurement position, the position of the measurement location and the number of measurement locations are set freely to some extent. It is easy to measure each part of a stepped shaft-shaped workpiece having a plurality of steps.

A shaft workpiece measuring device according to the present invention is a shaft workpiece measuring device for measuring an outer diameter dimension of a workpiece cut into a stepped shaft shape, the workpiece supporting base for supporting the workpiece in a fixed posture, and the workpiece A non-contact sensor device that measures the outer diameter of a work supported on a support table in a non-contact manner by a sensor unit, and the sensor unit of the non-contact sensor device is axially relative to the work on the work support table. Therefore, it is possible to efficiently measure the outer diameter dimensions at a plurality of positions in the axial direction of the workpiece cut into the stepped shaft shape.
The non-contact sensor device is installed on one side of the workpiece supported by the workpiece support base and irradiates the strip light in a direction in which the band width direction is perpendicular to the workpiece center, and the opposite side of the projector with respect to the workpiece And a sensor unit configured to receive a belt-shaped light irradiated by the projector and detect a range blocked by the work of the belt-shaped light, and an outer diameter value of the workpiece from an output of the light receiver In the case of having an output processing unit for obtaining and outputting, a sensor unit having a simple configuration can be detected at high speed and with high accuracy.
The non-contact sensor device has a measurement position setting unit that obtains the output of the light receiver of the sensor unit at a plurality of measurement positions in the axial direction of the workpiece on the workpiece support base, and the output processing unit includes each measurement Each part of a stepped shaft-shaped workpiece having a plurality of steps when the outer diameter value of a plurality of locations of the workpiece corresponding to each measurement position is obtained from the output of the light receiver measured at the position and output. Can be measured more easily.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an outline of a shaft processing facility provided with the shaft work measuring device of the present invention. This shaft machining equipment is a machine tool 1 that cuts a workpiece W0 into a stepped shaft-shaped shaft work W1, and a shaft that is installed adjacent to the machine tool 1 and measures the outer diameter of the shaft work W1. And a workpiece measuring device 11. The machine tool 1 is a two-turret type lathe. On the bed 2, a main shaft 3, a tail stock 4 that sandwiches the material workpiece W 0 from both ends by the main shaft 3 and rotatably supports the material workpiece W 0, two turret tool posts 5 A and 5 B, and A control panel 6 to be controlled is installed. The material workpiece W0 is rotated by the main shaft 3, and the peripheral surface of the material workpiece W0 is cut by a cutting tool (not shown) attached to the turret tool rests 5A and 5B.

  FIG. 2 and FIG. 3 are a front view and a side view of the shaft work measuring device 11 shown with a part thereof broken. The shaft work measuring device 11 includes a work support 12, a non-contact sensor device 13, a sensor moving mechanism 14, and a control panel 40 that controls the entire device.

  The work support base 12 supports the shaft work W1 in a fixed posture. As shown in FIG. 2, the work support base 12 includes a fixed base 16 provided on the base 15 at a predetermined interval and a tail stock 17. Become. The fixing base 16 has a core pushing shaft 19 that protrudes horizontally from the fixing base 18. The tail stock 17 includes a core pushing shaft 20 that is axially opposed to the core pushing shaft 19 of the fixed base 16, and an advancing / retreating drive source 21 such as an electric cylinder that drives the core pushing shaft 20 to advance and retreat in the axial direction. The shaft work W1 is supported at a horizontal posture by pushing both ends of the shaft work W1 with the core pushing shafts 19 and 20 of the fixed base 16 and the tail stock 17. As shown in an enlarged view in FIG. 4, the core pushing shafts 19 and 20 have conical portions 19a and 20a at the ends that serve as centers. Further, at both ends of the shaft work W1, conical recesses a for engaging the sensor holes, that is, the conical portions 19a and 20a of the core pushing shafts 19 and 20 are formed.

  The temporary work table 22 for temporarily placing the shaft work W1 before being supported by the work support table 12 at a position closer to the shaft work W1 than the fixed table 16 and the tail stock 17 of the work support table 12 on the base table 15. Is provided. The temporary placement table 22 includes a pair of plate pieces 23 and 23 provided in a position perpendicular to the axial direction of the core pushing shafts 19 and 20 at a position near the fixed table 16 and a position near the tail stock 17. Become. At the upper ends of these plate pieces 23, as shown in a front view in FIG. 5, a V-shaped cutout portion 23a for supporting both end shaft portions of the shaft work W1 is provided. As shown in FIG. 6A, the notch 23a has a depth at which the shaft core is located slightly below the shaft cores of the core pushing shafts 19 and 20 in a state where both shaft portions of the shaft work W1 are supported. It is formed in the size. By forming the notch portion 23a in this way, both core push shafts 19 and 20 of the work support base 12 are connected to both ends of the shaft work W1 temporarily placed on the temporary placement base 22 as shown in FIG. The shaft work W1 is lifted from the notch 23a by the guide of the conical recess a of the shaft work W1 by the conical parts 19a and 20a of the core pushing shafts 19 and 20, and the shaft work W1 is supported in a horizontal posture with high accuracy. be able to.

  In FIG. 2, a non-contact sensor device 13 is a device that measures the outer diameter of the shaft work W1 supported on the work support 12 in a non-contact manner, and includes a sensor unit 24, an output processing unit 25, and a measurement position setting. Part 26. As shown in FIG. 3, the sensor unit 24 includes a light projector 27 installed on one side of the supported shaft work W1 and a light receiver 28 installed on the other side of the shaft work W1. The light projector 27 and the light receiver 28 face each other at the upper ends of the U-shaped sensor support base 29 that is located below the supported shaft work W1 and extends in a direction perpendicular to the axial direction of the shaft work W1. Is provided. The sensor support 29 is mounted on a guide rail 30 laid on the base 15 in parallel with the axis of the shaft work W1 via a linear motion bearing 31. Thereby, the light projector 27 and the light receiver 28 constituting the sensor unit 24 are movable in parallel with the axis of the shaft work W1.

  As shown schematically in FIG. 7, the projector 27 includes a light emitting element 32 made of an LED or the like, and a collimator lens 33 that converts light emitted from the light emitting element 32 into a band light, and the band light Is irradiated in a direction in which the band width direction is perpendicular to the center of the shaft work W1. The light receiver 28 includes light receiving lenses 34 and 35 that collect the band-shaped light emitted from the projector 27 and a light receiving element 36 that converts the received band-shaped light into an electrical signal. The range blocked by W1 can be detected. For the band-like light, green visible light is preferable in terms of excellent detection accuracy.

  In FIG. 2, the control panel 40 is provided with an output processing unit 25 and a measurement position setting unit 26 of the non-contact sensor device 13. The output processing unit 25 is means for obtaining and outputting the outer diameter value of the shaft work W1 from the output of the light receiver 28 of the sensor unit 24 by image processing or the like. The measurement position setting unit 26 is a means for obtaining the output of the sensor unit 24 at a plurality of measurement positions in the axial direction of the shaft workpiece W1 on the workpiece support 12. The measurement position setting unit 26 receives data of the plurality of measurement positions from the outside so that the setting can be changed. In addition, the control panel 40 can change the setting of the data of the movement start position and movement end position of the sensor unit 24 from the outside in the measurement position setting unit 26 or other storage unit (not shown). Entered.

  The sensor moving mechanism 14 is a means for moving the sensor unit 24 of the non-contact sensor device 13 relative to the shaft workpiece W1 on the workpiece support 12 in the axial direction. Here, the sensor moving mechanism 14 is screwed into a ball screw 37 disposed below the base 15 in parallel with the guide rail 30, a motor 38 that rotationally drives the ball screw 37, and the ball screw 37. The ball nut 39 is connected to the sensor support 29. As a result, the rotation of the ball screw 37 by the motor 38 allows the sensor support base 29 to move horizontally along the guide rail 30, and the sensor unit 24 supported by the sensor support base 29 moves the shaft work W 1 on the work support base 12. Can move in the axial direction. The movement range of the sensor unit 24 is a section between both plate pieces 23 and 23 constituting the temporary placement table 22.

  The operation of measuring the outer diameter of the shaft workpiece W1 in the shaft workpiece measuring device 11 will be described below. Before the measurement, for example, the sensor unit 24 of the non-contact sensor device 13 stands by at a predetermined movement start position near the right plate piece 23 of the temporary placement table 22 in FIG. The shaft workpiece W1 cut into a stepped shaft shape by the machine tool 1 is carried by a loader (not shown) and temporarily placed on the temporary placement table 22 as shown in FIG. At this time, the shaft portions at both ends of the shaft work W1 are supported in a state where they are engaged with the V-shaped cutout portions 23a at the upper ends of the two plate pieces 23 of the temporary placing table 22 as shown in FIG. In this state, the fixed base 16 of the work support base 12 and the core pushing shafts 19 and 20 of the tail stock 17 face both ends of the shaft work W1.

  Next, the advancing / retreating drive source 21 of the tail stock 17 on the work support 12 advances the core pushing shaft 20 as shown in FIG. As a result, the shaft work W1 is supported on the work support 12 in a horizontal posture by being sandwiched between the two core push shafts 19 and 20 of the fixed base 16 and the tail stock 17. At this time, the shaft work W1 is lifted from the notches 23a of the two plate pieces 23 of the temporary placing table 22 by the guide of the conical recess a of the shaft work W1 by the conical portions 19a and 20a of the core pushing shafts 19 and 20. W1 can be accurately supported in a horizontal posture.

  Next, in response to a command from the control panel 40, the motor 38 of the sensor moving mechanism 14 is driven, and the sensor support base 29 moves horizontally along the guide rail 30 to the left in FIG. That is, the sensor unit 24 of the non-contact sensor device 13 moves in the axial direction with respect to the shaft workpiece W1 on the workpiece support 12. The movement range is between a movement start position and a movement end position set on the control panel 40. In the moving sensor unit 24, the band light is emitted from the projector 27, the light receiver 28 receives the band light irradiated by the projector 27, and the light receiver 28 detects the range blocked by the shaft light W1 of the band light. The detected value is output. The measurement position setting unit 26 of the non-contact sensor device 13 obtains the output of the light receiver 28 of the sensor unit 24 at a plurality of preset measurement positions in the axial direction of the shaft workpiece W1 on the workpiece support 12. The output processing unit 25 of the non-contact sensor device 13 obtains outer diameter values at a plurality of locations of the shaft work W1 corresponding to the respective measurement positions from the output of the light receiver 28 selected by the measurement position setting unit 26. Output. Thus, the outer diameter values at a plurality of locations of the stepped shaft-shaped shaft work W1 can be measured at high speed and with high accuracy. For example, high-speed measurement can be performed with a simple configuration as compared with a sensor that scans a laser beam by rotating a polygon mirror. Further, since it is a transmissive type, detection with higher accuracy can be performed with a simple configuration compared to the reflective type.

  FIG. 8 shows another embodiment of the present invention. In this embodiment, in the shaft machining facility shown in FIG. 1, the sensor moving mechanism 14A of the shaft work measuring device 11 is a mechanism for moving the work support 12 in the axial direction with respect to the shaft work W1 supported thereby. The sensor unit 24 of the non-contact sensor device 13 is fixed in position. In this case, since the shaft work W1 moves with respect to the fixed sensor part 24, the sensor part 24 moves relative to the shaft work W1 on the work support 12 in the axial direction. Other configurations are the same as those in the previous embodiment.

It is a front view which shows the outline | summary of the shaft processing equipment equipped with the shaft workpiece measuring device which concerns on one Embodiment of this invention. It is a front view of the shaft work measuring device shown with a part broken. It is a right view of the shaft work measuring device shown with a part broken. It is an enlarged front view showing the state where the shaft work was temporarily placed on the temporary placement table. It is a front view showing the state where the shaft work was temporarily placed on the temporary placement table. It is explanatory drawing of the operation | movement which supports the shaft workpiece on a temporary placement stand with a workpiece support stand. It is a schematic block diagram of the sensor part of a non-contact sensor apparatus. It is a front view which shows the outline | summary of the shaft processing equipment equipped with the shaft workpiece measuring device which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Shaft workpiece measuring device 12 ... Work support base 13 ... Non-contact sensor device 14 ... Sensor moving mechanism 24 ... Sensor part 25 ... Output processing part 26 ... Measurement position setting part 27 ... Light projector 28 ... Light receiver W1 ... Shaft work

Claims (3)

  A shaft workpiece measuring device for measuring an outer diameter dimension of a workpiece cut into a stepped shaft shape, the workpiece supporting table supporting the workpiece in a fixed posture, and a workpiece supported on the workpiece supporting table. A non-contact sensor device that measures the outer diameter in a non-contact manner by a sensor unit, and a sensor moving mechanism that moves the sensor unit of the non-contact sensor device relative to the workpiece on the workpiece support base in the axial direction. Equipped with a shaft work measuring device.   The non-contact sensor device is installed on one side of the work supported by the work support, and irradiates a band-shaped light in a direction in which the width direction is perpendicular to the work center, and the opposite side of the light projector with respect to the work And a sensor unit configured to receive a belt-shaped light irradiated by the projector and detect a range blocked by the work of the belt-shaped light, and an outer diameter value of the workpiece from an output of the light receiver The shaft work measuring device according to claim 1, further comprising an output processing unit that obtains and outputs the shaft work.   The non-contact sensor device includes a measurement position setting unit that obtains the output of the light receiver of the sensor unit at a plurality of measurement positions in the axial direction of the workpiece on the workpiece support table, and the output processing unit includes each measurement The shaft workpiece measuring device according to claim 1 or 2, wherein an outer diameter value at a plurality of positions of the workpiece corresponding to each measurement position is obtained from an output of the light receiver measured at the position and output.

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