JP3924766B2 - Calibration device for sensor roll - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shape detection device that detects a shape (flatness) from a tension distribution of a thin plate, and more particularly to a sensor roll calibration device of the shape detection device.
[0002]
[Prior art]
In order to improve the shape accuracy (flatness) of a thin plate during rolling, a shape detection device that detects a tension distribution in the width direction of the thin plate has been conventionally used (for example, Japanese Utility Model 3-11691, Japanese Utility Model 3- 11692, Japanese Patent Application No. 6-97206, etc.).
FIG. 4A is a vertical cross-sectional view of a sensor roll used in such a shape detection device, and FIG. 4B is a cross-sectional view taken along the line AA. As shown in this figure, the sensor roll of the shape detection apparatus includes a hollow shaft (arbor) 1, a rotor 2, a thrust ring 3, an air supply line 4, a pressure detection line 5, and the like. The rotor 2 is a ring-shaped air bearing that is levitated and supported by an arbor 1, and is formed by radial air holes 1 a provided radially on the arbor 1 and air pressure blown from thrust air holes 3 a provided axially on the thrust ring 3. Air levitates and rotates with little resistance. Further, as shown in FIG. 5B, during use, the rotor 2 receives a vertical load F due to the tension T of the thin plate 6 and is slightly decentered. Due to this decentering, the pressure between the arbor 1 and the rotor 2 changes. Is measured by the pressure detection line 5, converted into an electrical signal, the vertical load F acting on each rotor 2 is converted, and the distribution of the tension T is detected therefrom. In FIG. 4, 4a is an air filter.
[0003]
[Problems to be solved by the invention]
As described above, since the sensor roll measures the tension T from a slight change in the support pressure of the rotor 2 supported by the air bearing, it is necessary to perform a precise calibration in advance before use. For this reason, a calibration apparatus as illustrated in FIG. 5 is conventionally used.
[0004]
(A) shows that the weight 7a having a known weight is placed on the rotor 2 and the position is manually adjusted from the front and rear (left and right in this figure), and the level 7b is applied to the upper side of the weight 7a to place it vertically. After confirmation, the electrical signal is adjusted to a tension corresponding to a known weight (test load).
(B) is basically the same as (A), except that a jig 7c for adjusting the verticality of the weight 7a is installed at the lower part of the sensor roll, and vertical adjustment rods 7d are provided before and after the weight 7a. The lower end of the adjusting rod 7d is applied to the upper end of the jig 7c to confirm that the weight 7a is placed on the rotor 2 vertically.
[0005]
However, the conventional calibration apparatus illustrated in FIG. 5 has the following problems.
(1) Since the weight is on the roll, it is unstable, the load direction is difficult to pass through the center, and the reproducibility is low. In addition, since all adjustments are performed manually, the worker is required to have skill and concentration.
[0006]
(2) In addition, since the calibration device of (B) is measured in a state where the adjusting rod is in contact with the weight, the load is dispersed or the frictional force due to the contact acts to easily reduce the measurement accuracy, and the reproducibility is low. , Prone to instability.
(3) Further, in each of the devices (A) and (B), if the center position of the weight is deviated from the center in the width direction of the rotor, an offset load acts on the rotor, and the error increases.
[0007]
That is, in general, in the calibration apparatus, when the weight 7a is placed on the rotor during calibration work, an unbalanced load is generated unless the center of gravity of the weight coincides with the center in the width direction and the center in the axial direction of the rotor 2. However, it is difficult to make adjustments with conventional calibration devices, requiring skill and concentration, so calibration takes time and automation is almost impossible. There was a problem that was impossible.
[0008]
The present invention has been made to solve such problems. That is, the object of the present invention is to easily position the center of the weight to the center of the rotor in a short time, and thereby easily allow the weight load to pass vertically through the center of the rotor without requiring skill and concentration. It is an object of the present invention to provide a sensor roll calibration device that can be adjusted with good workability, has high reproducibility, has no disturbance load, can maintain a constant test load, and can be automated.
[0009]
[Means for Solving the Problems]
According to the present invention, a horizontal rail installed at the upper part along the axis of the sensor roll, a carriage supported by the horizontal rail and movable along the axis, and attached to the carriage and movable up and down A suspension fixture, a calibration jig that is suspended on the suspension fixture and applies a load on the rotor of the sensor roll, and a weight installed on the calibration fixture. rests on, being adapted to engage with the hanger is disengaged, the sensor roll the weights, wherein the calibration jig is adapted to be installed, that at a position lower than the rotor A calibration device is provided.
[0010]
According to the above configuration of the present invention, the weight is easily moved while the center of gravity G of the weight is positioned on the axis Z of the sensor roll by moving the carriage along the rail while the calibration jig is raised. Can be made. Next, after the carriage is moved to the central position C of the adjacent rotor, the central position of the weight can be easily positioned in the central position C of the rotor in a short time by lowering the hanging bracket as it is. Therefore, the weight load can be easily adjusted with good workability so that the weight load passes vertically through the center of the rotor without requiring skill and concentration. In addition, since only the calibration jig is placed on the rotor and the engagement between the lifting part and the suspension metal is released by the lowering of the suspension metal, the disturbance load other than the calibration jig does not act on the rotor. The load can be kept constant, and there is little error and high reproducibility can be maintained.
[0011]
According to a preferred embodiment of the present invention, the calibration jig includes a frame that surrounds and closes the sensor roll, a lifting portion that is attached to the upper portion of the frame and is lifted by a lifting bracket, and an upper end that is attached to the lower portion of the frame and has a lower end. A suspension rod adapted to place a weight on the part, and two roller bearings attached to the upper part of the frame at a horizontal interval perpendicular to the axis of the sensor roll and having an axis parallel to the axis. Thus, the center of gravity G of the weight passes through the center position of the two roller bearings at the balanced position.
[0012]
With this configuration, the center of gravity G of the weight is positioned below and sufficiently away from the center of the sensor roll, and the center of gravity passes through the center position of the two roller bearings in a balanced position. Even if it is slightly deviated from the above, a moment (weight of the weight × e) that eliminates the eccentricity acts on the calibration jig, and the center of gravity G of the weight automatically matches the center C of the rotor. Therefore, since the load is automatically centered accurately in the center direction due to the weight of the weight, the reproducibility and workability are good and can be easily automated.
[0013]
According to another embodiment, a feed screw installed rotatably in parallel with the horizontal rail, and a feed screw nut screwed to the feed screw and attached to the carriage, are provided by rotating the feed screw. The carriage is moved so that the center of gravity G of the weight coincides with the width center C of the rotor. With this configuration, for example, the position of the carriage in the width direction can be easily determined by using a ball screw or the like as the feed screw and performing remote operation not only manually but also using a stepping motor or the like.
[0014]
According to a preferred embodiment of the present invention, an elevating cylinder is attached to the lower part of the carriage, and the hanging bracket is raised and lowered by the elevating cylinder. With this configuration, the calibration jig can be moved up and down with high accuracy while keeping the center of gravity G of the weight coincident with the width center C of the rotor.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each drawing, common parts are denoted by the same reference numerals. FIG. 1 is a side view of a sensor roll calibration apparatus according to the present invention. As shown in this figure, the calibration device 10 of the present invention is movable along the axis Z supported by the horizontal rail 12 and the horizontal rail 12 installed on the upper side along the axis Z of the sensor roll. The trolley 14 is mounted on the trolley 14, the hangable bracket 16 attached to the trolley 14 can be moved up and down , the calibration jig 18 that is suspended by the suspending bracket 16 and applies a load onto the rotor 2 of the sensor roll, and the calibration jig 18. It consists of a weight 21 .
[0016]
2 is a cross-sectional view taken along line AA in FIG. As shown in this figure, the calibration jig 18 includes a frame 19 that surrounds and closes the sensor roll (the arbor 1 and the rotor 2), a lifting portion 20 that is attached to the upper portion of the frame 19 and is lifted by a lifting bracket 16, and a frame 19. A suspension rod 22 having an upper end attached to the lower portion thereof and a weight 21 placed on the lower end portion, and an axis Z attached to the upper portion of the frame 19 with a space in the horizontal direction perpendicular to the axis Z of the sensor roll. It consists of two roller bearings 23 having parallel axes. In this way, the weight 21 is set on the calibration jig 18 at a position below the rotor 2. The weight balance is adjusted so that the center of gravity G of the weight 21 and the center of gravity of the entire calibration jig 18 pass through the center positions of the two roller bearings 23 at the balanced position.
[0017]
Furthermore, in order to make the frame 19 easy to attach to and detach from the sensor roll, for example, as shown in the drawing, it is preferable that the frame 19 has a structure that can be divided or opened / closed by bolts, pins or the like at the middle part of the frame 19. Further, the projection 19 a is provided on the side surface of the frame 19, and the end surface thereof is visually matched with the end surface of the rotor 2, so that the frame 19 can be aligned with the axial center of the rotor 2.
[0018]
With this configuration, as schematically shown in FIG. 3, the center of gravity G of the weight 21 is positioned below and sufficiently away from the center Z of the sensor roll, and the center of gravity G is a balanced position and the center position of the two roller bearings 23. Even when the center position of the roller bearing 23 is slightly deviated from the center C of the rotor 2, the moment M (weight weight × e) that eliminates the eccentricity acts on the calibration jig 18, and the weight 21 The center of gravity G is automatically matched with the center C of the rotor. Therefore, since the load is automatically centered accurately in the center direction by the weight of the weight 21, reproducibility and workability are good and can be easily automated.
[0019]
The calibration device 10 of the present invention further includes a feed screw 24 (for example, a ball screw) that is rotatably installed in parallel with the horizontal rail 12, and a feed screw nut 25 that is screwed to the feed screw 24 and attached to the carriage 14. The carriage 14 is moved by the rotation of the feed screw 24 so that the center of gravity G of the weight 21 coincides with the width center C of the rotor 2.
[0020]
In addition, an elevating cylinder 26 is attached to the lower portion of the carriage 14, and the lifting metal fitting 16 is moved up and down by the elevating cylinder 26, and when the hanging metal fitting 16 is lowered, the engagement with the lifting portion 20 of the calibration jig 18 is released. The entire calibration jig 18 is placed on the rotor 2. In FIGS. 1 and 2, 11 is a calibration frame, 11a is a calibration frame, 13 is a suspension frame, 27 is a stepping motor, 28 is a feed drive shaft box, and 29 is a brake.
[0021]
With the above-described configuration, the carriage 14 is moved along the horizontal rail 12 with the calibration jig 18 raised by the lifting cylinder 26, so that the center of gravity G of the weight 21 is directly above the axis Z of the sensor roll. The weight 21 can be easily moved while being positioned. Next, after the carriage 14 is moved to the center position C of the adjacent rotor 2, the suspension fitting 16 is lowered as it is, so that the center position G of the weight 21 can be easily positioned at the center position C of the rotor in a short time. Therefore, the weight load can be easily adjusted with good workability so that the weight load passes vertically through the rotor center C without requiring skill and concentration. Further, as the suspension fitting 16 is lowered, only the calibration jig 18 is placed on the rotor, and the engagement between the lifting portion and the suspension fitting is released, so that a disturbance load other than the calibration jig acts on the rotor. Therefore, the test load can be kept constant, and high reproducibility can be maintained with little error.
[0022]
In addition, this invention is not limited to embodiment mentioned above, Of course, it can change variously in the range which does not deviate from the summary of this invention. For example, instead of the feed screw and the feed screw nut shown in FIG. 1 and FIG. 2, the positioning in the axial direction may be performed by the (1) pin method, or (2) the width of the calibration jig (projection 19a ) May be aligned with the rotor width and visually positioned in the axial direction.
[0023]
【The invention's effect】
As described above, the calibration device of the present invention can easily position the center of the weight to the center of the rotor in a short time so that the weight load can be perpendicular to the center of the rotor without requiring skill and concentration. It has excellent effects such as easy adjustment with good workability, high reproducibility, no disturbance load, constant test load, and further automation.
[Brief description of the drawings]
FIG. 1 is a side view of a sensor roll calibration apparatus according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is an explanatory diagram showing functions of a calibration jig.
FIG. 4 is a longitudinal sectional view of a sensor roll used in the shape detection device and a sectional view taken along line AA in FIG.
FIG. 5 is a schematic diagram of a conventional calibration apparatus.
[Explanation of symbols]
1 Hollow shaft (Arbor)
DESCRIPTION OF SYMBOLS 1a Radial air hole 2 Rotor 3 Thrust ring 3a Thrust air hole 4 Air supply line 5 Pressure detection line 6 Thin plate 7a Weight 7b Level 7c Jig 7d Adjustment rod 10 Calibration device 11 Calibration frame 12 Horizontal rail 13 Suspension frame 14 Carriage 16 Lifting bracket 18 Calibration jig 19 Frame 20 Lifting portion 21 Weight 22 Lifting rod 23 Roller bearing 24 Feed screw 25 Feed screw nut 26 Lifting cylinder 27 Stepping motor 28 Feed drive shaft box 29 Brake C Rotor width center G Weight center of gravity Z Sensor roll axis

Claims (4)

A horizontal rail installed above the axis of the sensor roll, a carriage supported by the horizontal rail and movable along the axis, a hanging bracket attached to the carriage and capable of moving up and down, and the suspension It consists of a calibration jig that is suspended on the metal fitting and applies a load on the rotor of the sensor roll, and a weight installed on the calibration jig ,
By the lowering of the lifting lugs, the calibration jig are adapted to ride on the rotor, is disengaged with lifting lugs,
The sensor roll calibration apparatus, wherein the weight is installed on the calibration jig at a position below the rotor .   The calibration jig includes a frame that surrounds and closes the sensor roll, a lifting part that is attached to the upper part of the frame and is lifted by a lifting bracket, and a suspension that has an upper end attached to the lower part of the frame and a weight placed on the lower part. It consists of a rod and two roller bearings attached to the upper part of the frame at a horizontal interval perpendicular to the axis of the sensor roll and having an axis parallel to the axis. The calibration device according to claim 1, wherein the calibration device is configured to pass through a center position O of two roller bearings.   A feed screw that is rotatably installed parallel to the horizontal rail, and a feed screw nut that is screwed to the feed screw and attached to the carriage. The sensor roll calibration apparatus according to claim 1, wherein the carriage is moved so as to coincide with C.   The sensor roll calibration apparatus according to claim 1, wherein a lifting cylinder is attached to a lower portion of the carriage, and the hanging metal fitting is lifted and lowered by the lifting cylinder.

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