JP2015102368A - Roll shape measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll shape measuring device capable of measuring a shape of a large diameter roll using an existing measuring instrument for a small diameter.SOLUTION: A roll shape measuring device includes a pair of measuring instruments 5a, 5b which is fixed in a state of being suspended from an arm 3 and measures a horizontal position of the outer diameter of a roll 100. The pair of measuring instruments 5a, 5b includes a projector 506 for irradiating a belt-like parallel light L and a light receiver 507 for measuring a position at which the band-like parallel light L is shielded by the roll 100, respectively. The fixing positions of the measuring instruments 5a, 5b to the arm 3 are adjusted according to a diameter of the roll 100 and fixed to the positions at which a part of the band-like parallel light L irradiated from each projector 506 is shielded by the roll 100.

Description

  The present invention relates to a roll shape measuring apparatus that measures the shape of a columnar or cylindrical roll in a non-contact manner.

  In gravure printing, the surface of a cylindrical steel pipe is plated with copper, and then the printing image is engraved on the surface of the plating layer. Then, after the printing is finished, the plating layer is peeled off, the plating layer is formed again on the surface of the steel pipe, the surface is polished, and the steel pipe is repeatedly used.

  A steel pipe (roll) having a copper plating layer formed on the surface is generally referred to as a cylinder. Since this cylinder is required to have high dimensional accuracy due to its nature, each time polishing is finished, the operator measures the outer diameter with a micrometer and monitors it to be within the specified size. ing.

  On the other hand, as a device for measuring the shape of a cylindrical roll, a non-contact type three-dimensional shape measuring device using laser light has been proposed (see Patent Document 1).

  The three-dimensional shape measuring apparatus described in Patent Document 1 includes a dimension measuring device including a projector that emits a band-shaped light beam and a light receiver that measures a position where the light beam is blocked by a roll. The three-dimensional shape of the roll can be measured by repeating the measurement of the outer diameter while rotating the roll and moving the dimension measuring instrument in the axial direction of the roll.

  Since the three-dimensional shape measuring device described in Patent Document 1 can automatically and rapidly measure the shape of a roll, if the shape of a gravure cylinder is measured using this measuring device, the time required for manufacturing the cylinder can be reduced. Can be greatly shortened.

  Furthermore, when measuring the outer diameter of the roll with a micrometer, there is a risk of damaging the surface of the roll. However, the three-dimensional shape measuring device described in Patent Document 1 measures the roll shape in a non-contact manner. The surface is not damaged.

JP 2002-148026 A

  As described above, the non-contact type three-dimensional shape measuring apparatus has excellent characteristics, but there is a limit to the roll diameter that can be measured. Some cylinders for gravure printing have a large diameter exceeding 100 mm, but a practical three-dimensional shape measuring apparatus uses a dimension measuring device that emits parallel light of about 60 mm. The outer diameter of a roll having a size larger than that cannot be measured.

  Therefore, for such a large-diameter roll, the actual situation is that the outer diameter can only be measured with a micrometer.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a roll shape measuring apparatus capable of measuring the shape of a large-diameter roll using an existing size measuring instrument for a small diameter.

In order to achieve the above object, a roll shape measuring apparatus according to the present invention includes:
Roll rotating means for rotating a cylindrical or columnar roll to be measured in a state where the central axis is kept horizontal;
A linear arm which is kept substantially horizontal above the roll and whose longitudinal direction is arranged in a direction perpendicular to the central axis of the roll;
A pair of dimension measuring devices attached to the arm in a suspended state and measuring the outer diameter of the roll;
Arm transfer means for transferring the arm in a direction parallel to the central axis of the roll;
Each of the pair of dimension measuring devices includes a projector that irradiates strip-shaped parallel light, and
A plurality of light receiving elements that receive the belt-like parallel light are arranged in a straight line, and a light receiver that detects a position where the belt-like parallel light is blocked by the roll;
The projector and the light receiver are configured with a plate that maintains a constant interval and supports the strip-shaped parallel light in a state of being irradiated in the vertical direction,
The mounting position of the pair of dimension measuring devices to the arm is adjusted according to the diameter of the roll, and is attached to a position where a part of the strip-shaped parallel light emitted from each projector is blocked by the roll. It is characterized by.

The roll shape measuring apparatus according to the present invention is further installed in the vicinity of one end of the roll and has a hole through which the rotating shaft of the roll rotating means passes, and the horizontal dimension is measured in advance. It has a master gauge composed of a plurality of plate-like members,
The position data measured by the light receiver when a part of the strip-shaped parallel light irradiated from each projector of the pair of dimension measuring devices is blocked by any of the plurality of plate-like members,
The outer diameter of the roll using the position data measured by the light receiver when a part of the strip-shaped parallel light irradiated from each projector of the pair of dimension measuring devices is blocked by the outer diameter of the roll. It is preferably used as reference data when calculating dimensions.

  The master gauge is composed of a plurality of disks having different diameters, and each disk is preferably arranged in a state where the center axis substantially coincides with the rotation center of the rotation axis of the roll rotating means.

In addition, the plate of the dimension measuring device is attached to the lower part of a square cylindrical bracket,
The plate is preferably held in a state of being suspended from the arm by inserting the arm formed in a prism shape into the hollow portion of the bracket.

In the roll shape measuring apparatus according to the present invention, the roll rotating means includes a headstock that is inserted into a hole formed at a central portion of one end surface of the roll, and a tip of the rotary shaft. It is composed of a core press stand inserted into a hole formed at the center of the other end face of the roll,
The headstock includes a base body that rotatably supports the rotating shaft, and a motor that rotates the rotating shaft,
The tailstock includes a base body that rotatably supports the rotation shaft, a pair of rails that move the base body in a direction parallel to a central axis of the roll, and the base body that is the pair of rails. It is preferable that the fixing member includes a fixing member that is fixed, and a pressing member that presses the rotating shaft against an end surface of the roll.

In the roll shape measuring apparatus according to the present invention, the arm transfer means includes a screw shaft disposed in parallel with a central axis of the roll, a nut screwed into the screw shaft, and a motor for rotating the screw shaft. Ball screw,
One end of the arm is fixed to a slider connected to the nut,
It is preferable that the slider is configured to be movable along a pair of rails installed in parallel with the central axis of the roll.

  The roll rotating means is preferably installed on the upper surface of the lower frame of the stepped metal frame, and the arm transfer means is installed on the upper surface of the upper frame of the frame.

The roll shape measuring apparatus according to the present invention further includes a controller for controlling operations of the roll rotating means, the arm transfer means, and the pair of dimension measuring instruments,
The controller includes: first data indicating a position of the outer diameter of the roll measured by the pair of dimension measuring instruments; second data indicating a position of any plate bar of the master gauge; and the plate It is preferable to calculate the outer diameter size of the roll based on the third data indicating the size of the member.

  If the roll shape measuring apparatus concerning this invention is used, the outer diameter dimension of a large diameter roll can be measured automatically and in a short time, and also with the same precision as the case where the outer diameter dimension of a small diameter roll is measured.

It is a perspective view which shows the structure of the mechanism system of the roll shape measuring apparatus concerning embodiment of this invention. It is a front view of the same apparatus. It is the principal part perspective view which looked at the arm and arm transfer means of FIG. 1 from diagonally upper left. It is a conceptual diagram which shows the state which measures the outer diameter dimension of a roll with a dimension measuring device. It is a block diagram which shows the structure of the control system of the roll shape measuring apparatus concerning embodiment of this invention. It is a flowchart explaining operation | movement of the roll shape measuring apparatus concerning embodiment of this invention. It is a figure which shows the measurement point of a roll, (a) is a measurement angle when rotating a roll and measuring an outer diameter dimension, (b) is when an outer diameter dimension is measured, moving an arm along a roll. Indicates the measurement position. It is the graph created based on the measurement data of an outer diameter dimension, (a) shows roundness and (b) shows cylindricity.

  Hereinafter, a roll shape measuring apparatus according to an embodiment of the present invention will be described with reference to the drawings.

<Configuration of roll shape measuring device>
First, with reference to FIG. 1 and FIG. 2, the configuration of the mechanical system will be mainly described in the configuration of the roll shape measuring device (hereinafter simply referred to as “shape measuring device”) according to the present embodiment. FIG. 1 is a perspective view showing a configuration of a mechanism system of a shape measuring apparatus according to the present embodiment, and FIG. 2 is a front view thereof.

  In the figure, each component member is assembled using bolts, nuts, and the like, but these are well-known fastening members and will not be described with reference numerals. Although not shown, a controller (see FIG. 5) for controlling the operation of the apparatus is installed in the vicinity of the shape measuring apparatus, and the controller and each component are connected by cables for power supply and signal transmission. ing. In the figure, these cables are omitted to avoid complexity.

  The shape measuring apparatus 1 according to the present embodiment includes a roll rotating means 2 (a spindle stock 2a and a tailstock 2b), an arm 3, an arm transferring means 4, first and second dimension measuring instruments 5a and 5b, and a master. It is composed of a gauge 6, and these members are respectively installed on a metal frame 7 formed in a step shape and having sufficient strength.

  The roll 100 which is a measurement target of the shape measuring apparatus 1 is formed in a columnar shape or a cylindrical shape, and a hole for inserting the rotation shaft of the roll rotating means 2 is formed in the center of both end faces of the columnar roll. Has been. On the other hand, in the case of a cylindrical roll, both end surfaces are covered with flanges, and a hole for inserting the rotation shaft of the roll rotating means 2 is formed in the center of the cover.

  The roll rotating means 2 rotates the roll 100 around the axis in a state where the central axis is kept horizontal. The roll rotating means 2 inserts the rotating shaft into the holes formed in the center portions of the left and right end faces of the roll 100. The spindle head 2a that supports the roll 100 and the tailstock 2b are configured.

  The headstock 2 a includes a rectangular parallelepiped base body 201 fixed to the lower frame 701, a rotary shaft 202 rotatably supported on the base body 201 via a bearing 203, and a truncated cone shape attached to the tip of the rotary shaft 202. Center cone 204, first pulley 205 attached to the rear end of rotating shaft 202, motor 206 (see FIG. 2) installed on lower frame 701 in the vicinity of base body 201, and attached to the rotating shaft of motor 206. The second pulley 207 (same as above) and a belt 208 (shown by a one-dot chain line in FIG. 2) wound between the first and second pulleys 205 and 207.

  The rotation of the motor 206 is transmitted to the rotary shaft 202 via the second pulley 207, the belt 208 and the first pulley 205. As will be described later, a rotary encoder (hereinafter simply referred to as “encoder”) 210 is attached to the rotating shaft of the motor 206 (see FIG. 5), and the rotation angle of the rotating shaft 202 is detected by the encoder 210.

  On the other hand, the core holder 2b is installed on a rectangular parallelepiped base body 251 installed on a flat spacer 252 and a lower frame 701, and a pair of rails 253 on which the spacer 252 moves, and a bearing 255. The rotary shaft 254 is rotatably supported by the table main body 251, and the truncated cone-shaped umbrella center 256 is attached to the tip of the rotary shaft 254. The pair of rails 253 are installed on the lower frame 701 in a state where each of the rails 253 is parallel to the central axis of the roll 100.

  A switch panel 257 having a plurality of control switches is attached to the front surface of the base body 251. Although not shown, a pressing member that presses the rotating shaft 254 against the roll 100 is built in the base body 251, and a fixing member that fixes the spacer 252 to the rail 253 is attached to the lower part of the spacer 252. Yes. Note that a rectangular parallelepiped recess 703 is formed in the lower frame 701 so as not to hinder the movement of the fixing member.

  In the present embodiment, an air cylinder is used as the pressing member and an actuator is used as the fixing member. However, other members may be used as long as they can exhibit the same function. The functions of the air cylinder and the actuator will be described in detail later with reference to FIG.

  When attaching the roll 100 to the headstock 2a and the tailstock 2b, the operator manually moves the spacer 252 along the pair of rails 253, and adjusts the position of the tailstock 2b according to the length of the roll 100. adjust. Next, the tips of the center cone 204 and the umbrella-type center 256 are inserted into holes formed at the centers of the left and right ends of the roll 100. At this time, the position of the tailstock 2b is adjusted as necessary.

  After the roll 100 is held by the center cone 204 and the umbrella-type center 256, the operator fixes the spacer 252 to the rail 253 by an actuator described later, and presses the rotating shaft 254 against the roll 100 by an air cylinder. In this way, the roll 100 is supported in a rotatable state by the spindle stock 2a and the core presser 2b.

  In the present embodiment, the case of measuring the outer diameter of a roll having a rotation shaft insertion hole formed in the center portion of both end faces has been described. However, the shape measuring apparatus according to the present invention has the center of both end faces. It is also possible to measure the outer diameter of a so-called roll with a shaft, to which a rotating shaft is attached. However, in that case, since it is necessary to support those rotating shafts by chucking or using two rotating rolls, it is necessary to change the structure of the headstock 2a and the tailstock 2b accordingly. There is.

  Next, the configuration and function of the arm 3, the arm transfer means 4, and the pair of dimension measuring instruments 5a and 5b will be described with reference to FIGS. 1 and 2 and FIG. FIG. 3 is a perspective view of the main part of the arm 3 and the arm transfer means 4 as viewed obliquely from the upper left. In the figure, the upper frame 702 on which the arm transfer means 4 is placed is omitted for easy understanding of the structure of the arm transfer means 4. For the same reason, the cover attached in front of the dimension measuring instrument 5b is omitted.

  The prism-shaped arm 3 is maintained substantially horizontal above the roll 100 and is arranged in a direction in which the longitudinal direction is orthogonal to the central axis of the roll 100. The rear part of the arm 3 is fixed to the slider 401 of the arm transfer means 4, and a pair of dimension measuring instruments 5 a and 5 b are attached to the arm 3 in a state of being suspended from the arm 3.

  The arm transfer means 4 transfers the arm 3 in a direction parallel to the central axis of the roll 100, and is constituted by a ball screw. Specifically, the arm transfer means 4 includes a slider 401 that fixes the arm, a pair of rails 402 that regulate the moving direction of the slider 401, a screw shaft 403, a nut 404, a bearing 405, and a main component of the ball screw. 406, a coupling 407, and a motor 408.

  The pair of rails 402 is fixed to the upper surface of the upper frame 702. A rectangular parallelepiped recess 704 is formed between the pair of rails 402 in the upper frame 702, and the screw shaft 403, the bearings 405 and 406, the coupling 407 and the motor 408 are accommodated in the recess 704.

  Both ends of the screw shaft 403 are supported by the bearings 405 and 406 in a rotatable state, and a nut 404 is screwed in the middle. The screw shaft 403 is coupled to the motor 408 via the coupling 407. When the motor 408 rotates, the nut 404 moves to the left and right along the screw shaft 403.

  As shown in FIG. 3, the lower part of the front and rear of the slider 401 is shaped to sandwich the pair of rails 402. Since the flat slider 401 to which the arm 3 is fixed is connected to and integrated with the nut 404, the arm 3 moves to the left and right along the rail 402 when the screw shaft 403 rotates.

  The mechanical limit 410 installed at the left end of the arm transfer means 4 is to mechanically stop the nut 404 when the nut 404 runs away to the left for some reason, and also has a function of a shock absorber.

  In the present embodiment, the arm transfer means 4 is composed of a ball screw, but is not necessarily limited to a ball screw. As long as the same moving speed and position accuracy can be ensured, the arm transfer means may be configured using other means such as a linear motor.

  Next, the dimension measuring devices 5a and 5b will be described. The pair of dimension measuring instruments 5a and 5b is used to measure the outer diameter dimension of the roll 100. The dimension measuring instruments 5a and 5b have the same shape, and are attached to the arm 3 in such a manner that the portions for measuring the outer diameter of the roll 100 face each other as shown in FIG. Hereinafter, the configuration and function of the dimension measuring instrument 5b will be described as a representative.

  The dimension measuring device 5b includes a bracket 501 which is an attachment portion to the arm 3, a plate-like plate 504 attached to the bracket 501, a projector 506 and a light receiver 507 fixed to the upper and lower portions of the plate 504, and a plate-like plate. Covers 508 and 509 (not shown in the figure) are configured.

  The dimension measuring instrument 5b is attached in a state where it is suspended from the arm 3 by inserting the arm 3 into the hollow portion of the bracket 501 having a rectangular tube shape. The mounting position of the bracket 501 on the arm 3 is adjusted by the operator according to the outer diameter of the roller 100 to be measured. A lever 502 is attached to the upper part of the bracket 501, and when the lever 502 is rotated clockwise, the bracket 501 is fixed to the arm 3 and held in that position.

  A plate-like plate 504 and covers 508 and 509 (not shown in the figure) are attached to the lower part of the bracket 501 so as to be orthogonal to each other. A projector 506 that irradiates a strip of parallel light using a semiconductor laser as a light source is attached to the upper portion of the plate 504, and a light receiver 507 configured of a CCD (Charge Coupled Device) is attached to the lower portion of the plate 504. The strip-shaped parallel light irradiated downward from the projector 506 is incident on the light receiver 507.

  In the drawing, the cover 509 is omitted so that the arrangement state of the projector 506 and the light receiver 507 can be understood, but the covers 508 and 509 are arranged so as to surround the projector 506 and the light receiver 507 as shown in FIG. They are fixed to each other with screws. The cover 509 has the same shape as the plate 504.

  Usually, a dimension measuring instrument measures the dimension of a measuring object by inserting a measuring object between a light projector and a light receiver, and detecting the position where the strip-shaped parallel light was blocked by the object. In the present embodiment, the outer diameter dimension of the roll 100 is measured using two dimension measuring instruments.

  A recess 505 into which the roll 100 is inserted is formed in the plate 504 between the projector 506 and the light receiver 507. The measurement of the outer diameter of the roll by the dimension measuring devices 5a and 5b will be described in detail later with reference to FIG.

  In the drawing, the band-like parallel light is emitted vertically downward from the projector 506 attached to the upper part of the second plate 504. However, the projector 506 is attached to the lower part of the plate 504, and the belt-like parallel light is vertically applied. You may make it irradiate upward and light-receive it with the light receiver 507 attached to the upper part of the plate 504. FIG.

  Next, the master gauge 6 used in calibration (calibration) will be described. In the present embodiment, calibration refers to reading horizontal position data of a disk constituting the master gauge 6 using the dimension measurement values 5a and 5b. The read position data is used as reference data when calculating the outer dimensions of the roll 100.

  In the present embodiment, the master gauge 6 uses three disks 601, 602 and 603 having different diameters arranged in a direction parallel to the central axis of the roll 100. The discs 601, 602, and 603 are attached to the base body 201 in a state where the central axis substantially coincides with the rotational center O of the rotational shaft 202 of the spindle stock 2 a. In addition, a hole through which the rotating shaft 202 is passed is formed at the center of the discs 601, 602 and 603.

<Measurement method of outer diameter of roll>
Next, a method for measuring the outer diameter of the roll 100 using the dimension measuring devices 5a and 5b will be described with reference to FIG. FIG. 4 is a conceptual diagram showing a state in which the outer diameter of the roll 100 is measured by the dimension measuring devices 5a and 5b.

  FIG. 4 shows a state in which the roll 100 attached to the headstock 2a and the tailstock 2b is viewed from the side. In the embodiment, the light projector 506 and the light receiver 507 of the dimension measuring device 5b are attached to the back side of the plate 504, but are shown by solid lines in the figure for easy understanding.

  Prior to the measurement of the dimensions, the operator moves the respective brackets 501 of the dimension measuring devices 5a and 5b in the directions indicated by the arrows, and the outer diameter of the roll 100 is a part of the strip-shaped parallel light L irradiated from the projector 506. Set to a position to block.

  The mounting positions of the projector 506 and the light receiver 507 on the plate 504 are accurately adjusted, and the strip-shaped parallel light L having a width W irradiated vertically downward from the projector 506 is received by a CCD having a width W. Incident on the vessel 507. When the position where the parallel light is blocked by the outer diameter of the roll 100 is measured by the light receiver 507, the position data represents the distance from the end of the band-shaped parallel light L having the width W.

  In FIG. 4, a circle indicated by a two-dot chain line indicates an outer diameter of one disk (here, referred to as a disk 601) of the master gauges 6 formed of a plurality of disks. The master gauge 6 is a disk having an accurate shape attached to the base body 201 in a state where the central axis substantially coincides with the rotation center O of the rotary shaft 202 of the headstock 2a, and the outer diameter D0 of the disk is It is measured in advance.

  Using the dimension measuring devices 5 a and 5 b, the outer diameter of the disc 601 of the master gauge 6 is irradiated with strip-shaped parallel light from the projector 506, and the position blocked by the disc 601 is measured by the light receiver 507. Let the measured position data be L0 and R0. On the other hand, using the same size measuring devices 5 a and 5 b, the outer diameter of the roll 100 is irradiated with strip-shaped parallel light from the projector 506, and the position blocked by the roll is measured by the light receiver 507. Let the measured position data be L1 and R1.

The outer diameter dimension D1 of the roll is expressed by the following equation (1) using the measurement data L0, L1, R0, R1 of the dimension measuring instruments 5a and 5b.
D1 = D0− | L0−L1 | − | R0−R1 | ----- (1)

  In Expression (1), the outer diameter dimension D0 of the disc 601 is accurately measured in advance, and the values of L0, L1, R1, and R0 are measured using the dimension measuring instruments 5a and 5b. Therefore, the outer diameter dimension of the roll 100 can be obtained by measuring the position obstructed by the disk of the strip-shaped parallel light master gauge and the outer diameter of the roll using the dimension measuring devices 5a and 5b.

In FIG. 4, the outer diameter dimension D1 of the roll is described as being smaller than the outer diameter dimension D0 of the disk, but when the outer diameter dimension D1 of the roll is larger than the outer diameter dimension D0 of the disk, The outer diameter D1 of the roll is represented by the following formula (2).
D1 = D0 + | L0-L1 | + | R0-R1 | ----- (2)

  When a commercially available size measuring device is used as the size measuring devices 5a and 5b, the position blocked by the outer diameter of the roll 100 can be measured with an accuracy of + -0.003 mm. The outer diameter D1 can be measured with an accuracy of 0.003 mm.

  Further, by operating the arm transfer means 4 and moving the arm 3 in parallel with the central axis of the roll 100, by repeating the measurement by the dimension measuring devices 5a and 5b, the outer diameter dimension of the roll at a plurality of positions in the length direction. Can be measured. Furthermore, if the roll 100 is rotated by a predetermined angle using the roll rotating means 2 and the outer diameter is measured in this state, the deviation of the outer diameter of the roll 100 in the circumferential direction can also be measured.

  As can be seen from the above formulas (1) and (2), the calculation of the outer diameter of the roll does not require data indicating the attachment positions of the dimension measuring instruments 5a and 5b to the arm 3. Therefore, when the operator adjusts the position where the dimension measuring devices 5 a and 5 b are attached to the arm 3, it is only necessary to visually insert a part of the roll 100 into the recess 505 of the plate 504. Therefore, the position adjustment of the dimension measuring instruments 5a and 5b can be completed in a short time.

  By the way, the inventors have a configuration in which the dimension measuring devices 5a and 5b are arranged above and below the roll, that is, a configuration in which the configuration in FIG. Using the same method, the outer diameter of the roll was measured. However, with this configuration, an accuracy of 0.003 mm could not be ensured, and the measurement accuracy was a value that was nearly one digit worse.

  Although the cause was examined, in the structure which arrange | positions a dimension measuring device on the upper and lower sides of a roll, it transfers to a horizontal direction in the state which stood the vertical direction. In this case, it is considered that a rotational moment acts on the arm due to the weight of the dimension measuring device, and the tip of the arm vibrates due to the moment during the transfer, and the measurement accuracy is thus lowered.

  On the other hand, since the shape measuring apparatus of the present invention employs a configuration in which the dimension measuring device is suspended from the arm, the rotational moment generated in the arm is very small, and as a result, the arm 3 hardly vibrates. It seems that the original accuracy of the dimension measuring instrument can be maintained.

  Further, in the present embodiment, the arm transfer means 4 is installed on the upper frame 702 of the stepped frame 7, and the slider 401 that fixes the end of the arm 3 is installed on a pair of upper frames 702. It is supported by rails 402. When such a configuration is adopted, the length of the arm 3 can be kept to the minimum necessary, so that the value of the rotational moment generated in the arm can be further reduced.

  In this embodiment, the disks 601, 602, and 603 constituting the master gauge 6 are attached to the headstock 2 a, but the present invention is not limited to this configuration. As long as they are arranged coaxially with the central axis of the roll 100, the discs 601, 602, and 603 may be attached to the tailstock 2b.

  Moreover, in this Embodiment, although the master gauge 6 was comprised using the some disc, it does not necessarily need to use a disc. Even when a plurality of plate-like members whose dimensions in the horizontal direction are measured in advance are used, the same function as when a disk is used can be realized. However, in this case, when the parallel light L radiated from the projector 506 is reflected by the surface of the plate-like member and enters the projector 506, there is a possibility that the projector may be damaged, so that the reflected light does not enter the projector. It is necessary to adopt.

  Furthermore, the number of plate-like members is not limited to three. When the diameter of the roll to be measured extends over a wide range, the number of plate-like members may be increased. However, since the structure becomes complicated when the number of plate-like members is increased, it is necessary to select an appropriate number according to the range of the diameter of the roll to be measured.

<Configuration of control system of shape measuring device>
Next, the configuration of the control system of the shape measuring apparatus according to the present embodiment will be described with reference to FIG. FIG. 5 is a block diagram showing the configuration of the control system of the shape measuring apparatus 1.

  The control system of the shape measuring apparatus 1 includes dimension measuring instruments 5a and 5b, an arm transfer means 4, a spindle stock 2a, a tailstock 2b, a controller 8 and a parsol computer (hereinafter abbreviated as “PC”) 9. Yes. Of these, the dimension measuring devices 5a and 5b have been described in detail earlier, and thus description thereof will be omitted.

  The encoder 411 of the arm transfer means 4 is attached to the rotation shaft of the motor 408 and detects the rotation speed of the motor 408. Since the rotation speed of the motor 408 is proportional to the moving distance of the slider 401, the position of the arm 3, that is, the measurement position of the dimension measuring instruments 5a and 5b is detected by detecting the rotation speed of the motor 408 with the encoder 411. be able to.

  The encoder 210 attached to the rotation shaft of the motor 206 of the head stock 2a detects the rotation angle of the rotation shaft 202 of the head stock 2a. By controlling the rotation of the motor 206 based on the value detected by the encoder 210, the roll 100 can be rotated by a predetermined angle.

  The air cylinder 260 of the tailstock 2 b is used to push the rotating shaft 254 forward and press the umbrella-shaped center 256 against the end face of the roll 100. On the other hand, the actuator 261 is used to fix the spacer 252 provided with the base body 251 to the rail 253.

  The switch panel 257 is provided with a switch for turning on / off the operation of the air cylinder 260, a switch for turning on / off the operation of the actuator 261, and a switch for stopping the rotation of the motor 206 in an emergency.

  The controller 8 controls the operation of each part of the shape measuring apparatus 1 and is housed in a box (not shown) installed in the vicinity of the frame 7, and includes a control unit 801, a calculation unit 802, a storage unit 803, and a touch panel. 804, a printer 805, and a power source 806.

  Although not shown, the controller 8 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory), and controls the CPU 8 by reading a program stored in the ROM and executing it by the CPU. The functions of the unit 801 and the calculation unit 802 are realized.

  The control unit 801 adjusts the rotation angle of the roll 100 by controlling the rotation of the motor 206 based on the control data stored in the storage unit 803, and similarly controls the rotation of the motor 408 to control the arm 3. Adjust the transfer position.

  The calculation unit 802 calculates the outer diameter size of the roller 100 based on the above formula (1) or (2) using the measurement data sent from the respective light receivers 507 of the dimension measuring devices 5a and 5b. The outer diameter dimension calculated by the calculation unit 802 is stored in the storage unit 803 and is ejected from the printer 805 as necessary.

  The storage unit 803 is generally configured by a non-volatile memory such as a flash memory, and stores data necessary for measurement, measurement data, and data calculated by the calculation unit 802.

  A touch panel 804 configured with a liquid crystal display is used to input data necessary for measurement and determination, such as a measurement position, a measurement angle, and an allowable value, and is used to display a measurement result. The printer 805 is used to launch measurement data and calculation data of the calculation unit 802.

  The power source 806 is connected to an external commercial power source 807, and supplies power for operation to each part of the shape measuring apparatus 1 via a cable (not shown).

  The PC 9 creates a graph of roundness and cylindricity shown in FIG. 8 based on the measurement data of the dimension measuring instruments 5a and 5b and the calculation data of the calculation unit 802. The hard disk built in the PC 9 stores software for creating a graph of roundness and cylindricity. The graph created by the PC 9 is displayed on the display. A method of creating a graph of roundness and cylindricity will be described in detail later with reference to FIG.

<Operation of shape measuring device>
Next, the operation of the shape measuring apparatus 1 according to the present embodiment will be described with reference to the front view of FIG. 2, the block diagram of FIG. 5, and the flowchart of FIG. A series of operations of the shape measuring apparatus 1 is performed based on the control of the controller 8. In addition, in the state before starting operation | movement of the shape measuring apparatus 1, the arm 3 is standing by in the position shown to A of FIG.

  First, the roll 100 which is a measuring object is attached between the spindle stock 2a and the core stock 2b (step S11). Specifically, the operator moves the tailstock 2b according to the length of the roll 100. Further, the tip of the center cone 204 of the headstock 2 a is inserted into the hole on the left end face of the roll 100, and the tip of the umbrella-shaped center 256 of the core presser base 2 b is inserted into the hole on the right end face of the roll 100.

  Thereafter, the switch of the switch panel 257 of the core presser 2b is pressed to operate the actuator 261, and the spacer 252 is fixed to the rail 253. Further, the air cylinder 260 is operated to push the rotating shaft 254 forward to press the umbrella-shaped center 256 against the end face of the roll 100.

  After the attachment of the roller 100 to the headstock 2a and the tailstock 2b is completed, the operator inputs measurement conditions from the touch panel 804 of the controller 8 (step S12). Specifically, the position of the roll for measuring the outer diameter dimension, the data of the rotation angle of the roll, and the data indicating the allowable value of the outer diameter dimension are input.

  Next, the operator adjusts the positions of the dimension measuring devices 5 a and 5 b with respect to the arm 3, so that the position shown in FIG. 4, that is, a position where a part of the strip-shaped parallel light irradiated from the projector 506 is blocked by the roll 100. Attach (step S13). After the position adjustment, the lever 502 is rotated to fix the bracket 501 to the arm 3.

  Next, calibration is performed (step S14). At the time of calibration, the arm 3 is moved to the region shown in FIG. 2B, and the three discs 601, 602, 603 are shifted from the projector 506 to the light receiver 507 by the method shown in FIG. Then, the strips of parallel light are irradiated toward the surface, the positions L0 and R0 shielded by the disk are measured, and the measurement data is stored in the storage unit 803.

  Depending on the size of the disc, the disc may not shield the strip-shaped parallel light L, so one of the three discs at which the positions L0 and R0 can be measured (for example, the measured value is that of the roll). The measurement value closer to the measurement value) is used as the reference data L0 and R0.

  After the calibration is completed, the arm 3 passes through the standby position (position A in FIG. 2), moves to the measurement area (area C in FIG. 2), and measures the outer diameter dimension (step S15). Specifically, the control unit 801 drives the arm transfer means 4 to move the arm 3 to the measurement point, and the position L1 where the roll 100 blocks the strip-shaped parallel light L using the dimension measuring devices 5a and 5b. After measuring R1, the data is stored in the storage unit 803.

  In the region C of FIG. 2, the above measurement is repeated while moving the arm 3 from left to right. If necessary, the measurement is repeated while rotating the roll 100 by a predetermined angle and further moving the arm 3 from the right to the left. The measurement data is stored in the storage unit 803.

  When measurement at all predetermined measurement points is completed (Yes in step S16), the control unit 801 moves the arm 3 to the standby position (position A in FIG. 2) and stops at that position (step S17). On the other hand, if the measurement has not been completed (No in step S16), the process returns to the process in step S15 to continue the measurement.

  Next, the calculation unit 802 calculates the outer diameter size of the measurement point of the roll 100 based on the formula (1) or the formula (2) using the measurement data of the dimension measuring devices 5a and 5b (step S18). The calculation result is compared with the allowable value stored in the storage unit 803 to determine whether the roll is appropriate (step S19). Specifically, when the calculated outer diameter of the roll is included within the allowable value range, it is determined to be appropriate, and otherwise, it is determined to be NO.

  The determination result is displayed on the touch panel 804 by the control unit 801 and stored in the storage unit 803. If necessary, the operator operates the printer 805 to output a determination result.

  Finally, the roll 100 is removed from the headstock 2a and the tailstock 2b, and the operation is finished (step S20). Specifically, the switch panel 257 of the tailstock 2b is operated to release the operation of the air cylinder 260 and the actuator 261, the tailstock 2b is manually moved to the right, and the roll 100 is moved to the headstock 2a and Remove from the tailstock 2b. This completes the roll shape measurement operation.

  Table 1 shows an example of the result of measuring the outer diameter of the roll 100 according to the flow shown in FIG. 6 using a commercially available dimension measuring device having a parallel light width W of 65 mm. FIG. 7 is a diagram showing the measurement points of the outer diameter of the roll 100 and corresponds to the measurement results in Table 1. 7A is a measurement angle when measurement is performed while rotating the roll 100, and FIG. 7B is a measurement position when the outer diameter is measured while moving the arm 3 along the roll 100. FIG. Is shown.

  As shown in Table 1, when the shape measuring apparatus 1 according to this embodiment is used, the outer diameter of the roll can be measured in units of 0.001 mm and with an accuracy of 0.003 mm.

<Example of creating data on roll shape>
In the above-described embodiment, only the case of measuring the outer diameter dimension of the roll has been described. However, the shape measuring device according to the present invention is not limited to the measurement of the outer diameter dimension, and processes data measured by the dimension measuring instrument. Thus, various data relating to the shape of the roll, such as roundness, cylindricity, and runout, can be created.

  FIG. 8 is a graph of data created using dedicated software based on the measurement data of the outer diameter shown in Table 1. FIG. 8A is a graph showing the roundness of the roll, and FIG. 8B is a group showing the cylindricity of the roll. In the figure, the solid line indicates the measured value D1 of the outer diameter dimension, and the thin line indicates the maximum allowable value Dmax and the minimum allowable value Dmin of the outer diameter dimension.

  The shape of the roll shown in the figure is different from the actual shape, and shows only values in the vicinity of the maximum allowable value Dmax and the minimum allowable value Dmin of the outer diameter dimension. Further, the intermediate value between the measurement angle and the measurement position is an estimated value created based on the measurement data.

  Note that the graph of FIG. 8 cannot be created using only the data in Table 1, so additional measurement is required. The reason will be briefly described below.

  In the method for measuring the outer diameter shown in FIG. 4 described above, the rotation axis of the roll and the central axis of each disk of the master gauge 6 are coincident, but there is actually a slight deviation. When measuring the outer diameter of the roll, this deviation does not affect the measured value, but in order to create the graph shown in FIG. 8, the distance from the central axis of the roll to the outer diameter, that is, the radius data of the roll is obtained. Necessary.

  In order to obtain the roll radius data, the outer diameter dimension is measured at an arbitrary angle, and the outer diameter dimension is measured while the roll is further rotated 180 degrees. It is necessary to calculate the amount of deviation between the shaft and the central axis of the master gauge 6 disk, and to increase or decrease the radius dimension by the amount of deviation.

  From the graph of roundness in FIG. 8A and cylindricity in FIG. 8B, the shape of the roll to be measured is in the allowable range. It can be easily confirmed through vision.

  In the above-described embodiment, the case where the shape of the gravure printing cylinder is measured using the shape measuring device according to the present invention is described. However, the shape measuring device according to the present invention is used for gravure printing. It is not limited to measuring the shape of a cylinder. Needless to say, the present invention can also be applied to the measurement of the shape of a roll having a larger diameter, such as a shaft of a turbine.

DESCRIPTION OF SYMBOLS 1 Roll shape measuring apparatus 2 Roll rotating means 2a Main stock stand 2b Core pushing block 3 Arm 4 Arm transfer means 5a, 5b Dimension measuring instrument 6 Master gauge 7 Frame 8 Controller 9 PC
201, 251 Base body 202, 254 Rotating shaft 203, 255, 405, 406 Bearing 204 Center cone 205, 207 Pulley 206, 408 Motor 208 Belt 252 Spacer 253, 402 Rail 256 Umbrella type center 257 Switch panel 401 Slider 403 Screw shaft 404 Nut 407 Coupling 501 Bracket 502 Lever 504 Plate 506 Emitter 507 Receiver 508, 509 Cover 601, 602, 603 Disc 701 Lower frame 702 Upper frame 703, 704 Recess 801 Control unit 802 Calculation unit 803 Storage unit 804 Touch panel 805 Printer 806 Power supply

Claims (8)

Roll rotating means for rotating a cylindrical or columnar roll to be measured in a state where the central axis is kept horizontal;
A linear arm which is kept substantially horizontal above the roll and whose longitudinal direction is arranged in a direction perpendicular to the central axis of the roll;
A pair of dimension measuring devices attached to the arm in a suspended state and measuring the outer diameter of the roll;
Arm transfer means for transferring the arm in a direction parallel to the central axis of the roll;
Each of the pair of dimension measuring devices includes a projector that irradiates strip-shaped parallel light, and
A plurality of light receiving elements that receive the belt-like parallel light are arranged in a straight line, and a light receiver that detects a position where the belt-like parallel light is blocked by the roll;
The projector and the light receiver are configured with a plate that maintains a constant interval and supports the strip-shaped parallel light in a state of being irradiated in the vertical direction,
The mounting position of the pair of dimension measuring devices to the arm is adjusted according to the diameter of the roll, and is attached to a position where a part of the strip-shaped parallel light emitted from each projector is blocked by the roll. A roll shape measuring device characterized by the above. A master gauge which is installed in the vicinity of one end of the roll and has a hole through which the rotation shaft of the roll rotating means passes and which is composed of a plurality of plate-like members whose horizontal dimensions are measured in advance. Prepared,
The position data measured by the light receiver when a part of the strip-shaped parallel light irradiated from each projector of the pair of dimension measuring devices is blocked by any of the plurality of plate-like members,
The outer diameter of the roll using the position data measured by the light receiver when a part of the strip-shaped parallel light irradiated from each projector of the pair of dimension measuring devices is blocked by the outer diameter of the roll. The roll shape measuring apparatus according to claim 1, wherein the roll shape measuring apparatus is used as reference data when calculating dimensions.   The master gauge is composed of a plurality of disks having different diameters, and each of the disks is arranged in a state in which a center axis substantially coincides with a rotation center of a rotation axis of the roll rotating unit. The roll shape measuring apparatus as described. The plate of the dimension measuring device is attached to the lower part of a square-shaped bracket,
The roll shape according to any one of claims 1 to 3, wherein the plate is held in a state of being suspended from the arm by inserting the arm formed in a prism shape into a hollow portion of the bracket. measuring device. The roll rotating means includes a headstock that is inserted into a hole formed at a center portion of one end surface of the roll, and a tip end of the rotating shaft at a center portion of the other end surface of the roll. It consists of a tailstock that is inserted into the formed hole,
The headstock includes a base body that rotatably supports the rotating shaft, and a motor that rotates the rotating shaft,
The tailstock includes a base body that rotatably supports the rotation shaft, a pair of rails that move the base body in a direction parallel to a central axis of the roll, and the base body that is the pair of rails. The roll shape measuring apparatus according to any one of claims 1 to 4, comprising a fixing member to be fixed and a pressing member that presses the rotating shaft against an end face of the roll. The arm transfer means is constituted by a ball screw provided with a screw shaft arranged in parallel with the central axis of the roll, a nut screwed into the screw shaft, and a motor for rotating the screw shaft,
One end of the arm is fixed to a slider connected to the nut,
The roll shape measuring apparatus according to any one of claims 1 to 5, wherein the slider is configured to be movable along a pair of rails installed in parallel with a central axis of the roll. The roll rotating means is installed on the upper surface of the lower frame of the stepped metal frame,
The roll shape measuring apparatus according to claim 1, wherein the arm transfer means is installed on an upper surface of an upper frame of the frame. A controller for controlling the operation of the roll rotation means, the arm transfer means and the pair of dimension measuring devices;
The controller includes: first data indicating a position of the outer diameter of the roll measured by the pair of dimension measuring instruments; second data indicating a position of any plate bar of the master gauge; and the plate The roll shape measuring apparatus according to any one of claims 1 to 7, wherein an outer diameter dimension of the roll is calculated based on third data indicating a dimension of the shaped member.

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