JP2000225414A - Straightening device, straightening method, measuring device and measuring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a straightening device, straightening method, measuring device and measuring method whose operabilities are improved. SOLUTION: An object 1 to be measured is supported at both ends with clamping devices 8a, 8b and positioned with indexing/positioning devices 9a, 9b. The size of the outside diameter of the object 1 to be measured is measured with an outside diameter measuring means 40. The size of the thickness of the object 1 to be measured is measured with an thickness measuring means 50. The bend of the object 1 to be measured is straightened with a straightening press means 20. Based on the sizes of the outside diameter and thickness measured with the outside diameter measuring means 40 and thickness measuring means 50, a straightening method and straightening condition are set and, by controlling the straightening press means 20, the bend of the object 1 to be measured is straightened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening device, a straightening method, a measuring device, and a measuring method for measuring and correcting the shape of a relatively long mold steel material, a pipe material, and the like and the shape such as overall bending.

[0002]

2. Description of the Related Art In general, products such as relatively long mold steel and pipes have a complicated deformed shape due to warpage, bending, and cross-sectional deformation during the manufacturing process. Therefore, for products requiring precise dimensions and shapes, the dimensions are measured, and in the case of tolerance deviations, dimensional accuracy is ensured by correction.

A shape measuring apparatus is disclosed in, for example,
As described in Japanese Patent No. 0649, there is known a method in which a cross-sectional shape and dimensions of a product are bent and bent or sled separately. Further, a shape measuring device and a correcting device for correcting a shape are generally separate devices.

[0004]

That is, in the conventional apparatus, the measurement of the shape of an object to be measured such as a mold steel material or a pipe material and the correction of the object to be measured whose shape has been measured are performed by separate devices. Therefore, there is a problem that a large number of man-hours are required for the work of setting and holding the object to be measured.

An object of the present invention is to provide a straightening device, a straightening method, a measuring device, and a measuring method with improved workability.

[0006]

Means for Solving the Problems (1) In order to achieve the above object, the present invention provides an outer diameter measuring means for measuring the outer diameter of an object to be measured, and an apparatus for measuring the thickness of the object to be measured. Controlling the thickness measuring means for measuring, the correcting press means for correcting the bending of the object to be measured, the support mechanism for supporting the object to be measured, and the outer diameter dimension measuring means and the supporting mechanism. The outer diameter of the object is measured, the thickness of the object is measured by controlling the thickness measuring means and the support mechanism, and the measured outer diameter and thickness are measured. And a control means for setting the correction method and the correction conditions based on the above, and controlling the correction press means and the support mechanism to correct the bending of the object to be measured. With this configuration, the cross section or the entire bend of the measured object is automatically corrected, and the workability can be improved.

(2) In the above (1), preferably,
The support mechanism section is a supporting means for supporting both ends or a bottom of the object to be measured, an indexing means for determining and positioning the position of the object to be measured, and a correcting support position when correcting the object to be measured. Correction support means that supports the object under test and can be positioned at an arbitrary position, and uses the support means and the indexing and positioning means to change the object under test. . With this configuration, it is possible to improve the work efficiency of switching the object to be measured.

(3) In the above (2), preferably,
The support mechanism, further, at the time of correcting the measured object,
The apparatus is provided with a restraining means for restraining the object to be measured to prevent the displacement. With this configuration, it is possible to prevent the displacement of the measured object at the time of correction.

(4) In the above (1), preferably,
The outer diameter dimension measuring means and the plate thickness dimension measuring means are mounted on the straightening press means. With such a configuration, since only one moving mechanism is required for each of the above-described units, the apparatus can be made compact.

(5) In the above (1), preferably,
The straightening press means is mounted on an upper portion of a base portion overhanging frame, and is disposed below the overhanging frame with respect to a straightening support mechanism capable of moving the upper portion of the frame. The straightening portion has a structure capable of passing through, and at the time of straightening, converts a straightening reaction force generated by straightening between the straightening support mechanism portion and the straightening press mechanism portion into a compressive force in the thickness direction of the base portion overhang frame. It is like that. With this configuration, the correction reaction force generated by performing the correction between the correction support mechanism and the correction press mechanism during the correction can be converted into the compressive force in the thickness direction of the base overhang frame. The bending moment applied to the partial frame can be reduced.

(6) In the above (1), preferably,
The control means detects an inflection point of the overall bending of the object to be measured based on the outer diameter and the thickness of the object measured by the outer diameter measuring means and the thickness measuring means. The correction is started from the vicinity of the inflection point where the amount of change in bending is the largest among a plurality of inflection points. With such a configuration, even when an object to be measured having a complicated bend or warp is corrected, the complicated bend can be corrected with high accuracy and efficiency.

(7) In the above (6), preferably,
The control means performs the correction while sequentially shifting the position in the longitudinal direction of the measured object from the point where the correction is started. With this configuration, it is possible to efficiently perform bending correction.

(8) In the above (1), preferably,
The control means detects the point at which the straightening press means makes contact with the object to be measured, the point at which the corrective press is pushed into the plastic area from the elastic area of the object to be measured, and the amount of indentation and indentation load of the straightening press. The correction target value is determined from the detection result of the measurement and the measurement result of the measured object, and the correction is performed.

(9) In order to achieve the above object, the present invention relates to a correction method for correcting an object to be measured, wherein an outer diameter and a plate thickness of the object to be measured are measured, and the measured object is measured. By detecting the inflection point of the entire bending of the object to be measured based on the outer diameter dimension and the plate thickness dimension of the object, the correction is started from the vicinity of the inflection point where the amount of bending change is the largest among a plurality of inflection points. It was done.

(10) In order to achieve the above object, the present invention has a laser emitting section and a light receiving section arranged with a cross section of an object to be measured interposed therebetween. A laser measuring head for measuring a diameter, and an ultrasonic measuring head for jetting jet water onto the surface of the object to be measured and measuring the thickness of the object to be measured by ultrasonic waves emitted from the object to be measured. It was made. With this configuration, it is possible to measure the outer diameter dimension and the plate thickness dimension of the workpiece having complicated deformation with high accuracy.

(11) In the above (10), preferably, the laser measuring head and the ultrasonic measuring head are assembled to the same positioning drive mechanism.

(12) In the above (10), preferably, the apparatus further comprises a jet water supply device for supplying water to the ultrasonic measuring head and receiving and collecting water from the surface of the object to be measured. Things. With this configuration, the water treatment can be easily performed.

(13) In the above (10), preferably, when measuring the thickness of the object to be measured, the ultrasonic measuring head moves in a direction perpendicular to the longitudinal direction of the object to be measured. A guide roller is provided, and the guide roller is pressed against the surface of the measured object so as to follow the length direction of the measured object. With this configuration, the distance between the surface of the object having complicated deformation and the ultrasonic measurement head can be made constant, and the measurement position can be stably positioned.

(14) In order to achieve the above object, according to the present invention, an ultrasonic measuring head is used to jet jet water onto the surface of an object to be measured, and the ultrasonic wave emitted from the object to be measured is used to jet the jet water. In the measuring method for measuring the thickness of a measured object, the ultrasonic measuring head is a guide that can move in a direction perpendicular to the length direction of the measured object when measuring the thickness of the measured object. By using a roller and pressing a guide roller against the surface of the object to be measured, the guide roller can follow the length of the object to be measured.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of a straightening device and a straightening method according to an embodiment of the present invention will be described below with reference to FIGS. First, the overall configuration of the correction device according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view of the straightening device according to the present embodiment, and FIG.
FIG. 2 is a plan view of the correction device according to the present embodiment. In addition,
1 and 2, the same reference numerals indicate the same parts.

The product to be measured or corrected by the straightening device of the present embodiment is a hollow pipe, and the hollow pipe is assembled on the inner diameter side of the hollow pipe due to the function of the product. These parts are products that slide. For this reason, the dimensional accuracy of the outer diameter and the inner diameter of each hollow pipe and the dimensional accuracy for the entire warp and bending are strictly controlled. Therefore, it is necessary to measure the inner diameter of a long hollow pipe. In the following description, a hollow pipe will be described as an example, but the shape measurement and correction can be similarly performed on a solid product, a mold steel material, and the like.

The DUT 1 shown in FIG.
m, a long pipe having a hollow pipe shape with an outer diameter of 150 mm. The end clamp devices 8a and 8b
Are provided at both ends, and the inner diameter of the DUT 1 can be gripped by clamp claws. Rotation indexing positioning devices 9a, 9b
Performs the rotation indexing and the rotation positioning of the end clamp devices 8a and 8b, respectively. End clamping device 8a,
8b and the rotation indexing positioning devices 9a and 9b are mounted on moving tables 10a and 10b.

The movable table 10a can be moved on the mounting base 13 in the longitudinal direction (x2 direction in the figure) of the workpiece by the drive actuator 15a, and can be positioned at any position. The moving table 10b is moved on the position adjustment table 14 by the actuator 15b.
It is movable in the longitudinal direction (x3 direction in the figure) of the DUT, and presses the right end face of the DUT 1. The position adjustment table 14 is positioned at x3 in FIG.
The position in the direction is adjustable.

Generally, since there are various types of lengths of the DUT 1, the position adjustment table 14 disposed on the right side in accordance with the length of the DUT with respect to the left end surface of the DUT 1 serves as a reference. The position of the end clamping device 8b and the rotary indexing positioning device 9b, which are clamping mechanisms, are adjusted. That is, the position adjustment table 14 is roughly adjusted according to the length of the DUT 1, and the clamp table 8b is pressed against the DUT 1 by moving the movable table 10b.

After clamping the inner diameter of the end of the DUT 1,
By driving the rotation indexing positioning device 9a, the DUT 1 is rotated to perform position indexing. At this time, the rotation indexing positioning device 9b is driven by the rotation indexing positioning device 9a.

The left support table 6a is attached to the mounting base 13
It can be moved in the longitudinal direction (x2 direction in the figure) of the DUT 1 by the cylinder 11a mounted thereon. An upper and lower support cylinder 7a that can move in the vertical direction (z2 direction in the figure) is incorporated in the left support table 6a. The right support table 6b can be moved in the longitudinal direction (x3 direction in the drawing) of the DUT 1 by a cylinder 11b mounted on the position adjustment table 14. An upper and lower support cylinder 7b that can move in the up and down direction (the z3 direction in the figure) is incorporated in the right support table 6b.

On the correction support frames 5a and 5b, there are mounted displacement prevention mechanisms 2a and 2b, correction support dies 3a and 3b, and vertical positioning mechanisms 4a and 4b, respectively. The displacement prevention mechanisms 2a and 2b prevent the deviation and the circumference of the DUT 1 occurring at the time of correction or delivery, and are configured to sandwich the outer diameter of the DUT 1. The correction support dies 3a and 3b are capable of receiving the weight of the measured object 1 and the reaction force of the correction when correcting the measured object 1. Vertical positioning mechanism 4a, 4b
Supports the DUT 1 and can be positioned vertically. The correction support frames 5a and 5b are respectively movable in the longitudinal direction (x4 and x5 directions in the figure) of the DUT 1. The device under test 1 includes positioning devices 9a and 9b.
, But is fixed in the longitudinal direction. Therefore, the correction support frames 5a, 5b
In the longitudinal direction of the DUT 1 (x4, x5 in the figure)
Direction), the orthodontic support dies 3a, 3b
Can be arbitrarily positioned at a position in the longitudinal direction of the DUT 1.

A correction press means 2 movable on the base 17 in the longitudinal direction (x1 direction in the figure) of the workpiece 1 is provided.
0 is provided. The straightening press means 20 includes a straightening head that applies a straightening force to the DUT 1, and the straightening head is driven by a straightening press cylinder 23. The straightening press cylinder 23 is attached to a horizontal frame 21 fixed to a vertical frame 24. The horizontal frame 21 can be moved by the motor 22 on the base 17 in the longitudinal direction of the DUT 1 (x1 direction in the drawing).
The detailed configuration of the straightening press means 20 is described in FIG.
This will be described in detail with reference to FIG.

Further, on the vertical frame 24 to which the correcting press means 20 is attached, an outer diameter measuring means 40 for measuring the outer diameter of the DUT 1 and a thickness measuring means 50 for the DUT 1 are provided. Installed. Outer diameter measuring means 4
The zero and the plate thickness measuring means 50 are movable in the longitudinal direction (x1 direction in the figure) of the DUT 1 similarly to the correction press means 20. The detailed configurations of the outer diameter dimension measuring means 40 and the plate thickness dimension measuring means 50 will be described later with reference to FIGS.

The thickness measuring means 50 in the present embodiment.
Is for jetting jet water onto the DUT 1 and measuring the plate thickness by ultrasonic waves generated at that time. The jet water supply device 60 supplies water to the plate thickness measurement means 50, Collect the water used for the measurement. The detailed configuration of the jet water supply means 60 will be described later with reference to FIG.

Next, the configuration of the correction mechanism of the correction device according to the present embodiment will be described with reference to FIGS.
FIG. 3 is a right side view of the straightening device according to the present embodiment,
FIG. 4 is a left side view of the straightening device according to the present embodiment.
1 and 2 denote the same parts.

As the correcting mechanism for correcting the object 1 to be measured, the vertical frames 24a, 24a provided with a moving guide at the lower part are provided.
4b and a horizontal frame 21 to form a C-shaped frame as a whole. Also, below the overhanging frames 18a, 18b arranged on the base 17,
Rail 19 for moving the device under test 1 in the longitudinal direction
a, 19b, and overhang frames 18a, 18b
The vertical frames 24a and 24b are attached so that the vertical frames 24a and 24b are suspended. With this structure including the straightening support mechanism, the straightening force when straightening the DUT 1 is transmitted to the straightening support dies 3a, 3b, and at the same time, the straightening force from the straightening press unit is also transmitted to the vertical frames 24a, 24b. The correction force is transmitted to the overhanging frames 18a and 18b via the through-hole, and the correction force is comprehensively converted into the compression force of the overhanging frames 18a and 18b, so that an uneven moment is not added to the straightening press mechanism. .

In FIG. 3, the motor 16a is for moving the correction support frame 5a shown in FIG. In FIG. 4, a motor 16b is for moving the correction support frame 5b shown in FIG. The cylinder 12b is for moving the vertical positioning mechanism 4b up and down.

Next, referring to FIG. 5, the straightening press section 30 of the straightening press means 20 used in the straightening device according to the present embodiment will be described.
A detailed configuration will be described. FIG. 5 is a sectional view of a straightening press unit used in the straightening device according to the present embodiment. 1 and 2 denote the same parts.

The straightening press cylinder 23 is mounted downward at the center of the horizontal frame 21 shown in FIG. At the tip of the correction press cylinder 23, a correction press unit 30 for correcting an object to be measured (object to be corrected) is attached.

The tip of the straightening press cylinder 23 is attached to the guide block 32 via the rod block 31 of the straightening press section 30. Guide block 32
Are guided by the guide frame 33 and are mounted on the lower end of the guide block 32 at the corrective pressing mold 34.
Can be moved up and down, and can be positioned with high accuracy. The correction press mold 34 has a semicircular cross-sectional shape according to the outer diameter of the pipe-shaped measurement target (correction target).
Further, the guide frame 33 disposed on the outer periphery of the guide block 32 receives a moment generated by the correction, and can perform a highly accurate guide.

The cylinder force is transmitted to the load cell 35 mounted inside the guide block 32 via the rod block 31 attached to the rod of the straightening press cylinder 23. Further, an anvil shaft 37 transmits a contact force with an object to be measured (object to be corrected) to the contact point detection load cell 36 embedded in the lower part of the guide block 32. The anvil shaft 37 is a straightening press die 3
4 is provided with a through hole at the center, and the head is protruded from the through hole by an appropriate amount. By mounting a spring 38 between the contact point detection load cell 36 and the anvil shaft 37, the contact point detection load cell 36
, And more stable detection can be performed. Further, when the anvil shaft 37 is brought into contact with the device under test 1, it is attached so as to contact the apex of the device under test 1.

Next, referring to FIGS. 6 to 8, a description will be given of the configuration of the shape measuring mechanism section including the outer diameter measuring means 40 and the plate thickness measuring means 50 used in the straightening device according to the present embodiment. FIG. 6 is a sectional view of a shape measuring mechanism used in the straightening device according to the present embodiment, FIG. 7 is a front view of an outer diameter measuring unit used in the straightening device according to the present embodiment, and FIG. It is a front view of the board thickness measuring means used for the straightening device by an embodiment. 1 and 2 denote the same parts.

As shown in FIG. 6, the outer diameter dimension measuring means 40 and the plate thickness dimension measuring means 50 constituting the shape measuring mechanism are provided.
Is attached to the frame frame FR for shape measurement. Then, as shown in FIG. 1, the vertical frame 24a, 24b is provided on the center side surface of the structure assembled with the frame frame FR for shape measurement and in the upper direction of the DUT 1, as shown in FIG. . The outer diameter measuring means 40 measures the outer diameter of the DUT 1 using light. The plate thickness measuring means 50 measures the plate thickness of the DUT 1 using ultrasonic waves generated by jet water.

Next, the configuration of the outer diameter dimension measuring means 40 will be described with reference to FIGS. The outer diameter measuring means 40 includes laser emitting units 41a and 41 for emitting laser light.
1b and laser light receiving sections 42a and 42b.
The laser emitting section 41a and the laser receiving section 42a form a pair,
Further, the laser light emitting section 41b and the laser light receiving section 42b form a pair. The laser light La emitted from the laser emitting section 41a is received by the laser receiving section 42a. Also, the laser light Lb emitted from the laser light emitting portion 41b
Is received by the laser receiving unit 42b.

The laser emitting sections 41a and 41b and the laser receiving sections 42a and 42b are mounted on a laser positioning frame 43, respectively. The laser positioning frame 43 can be moved by a cylinder 44 in the Z1 direction in the figure, and can be vertically indexed. The laser positioning frame 43 is lowered by the cylinder 44 and moved to the position shown by the two-dot chain line in the figure, and the device under test 1 is irradiated with the laser beams La ′ and Lb ′ emitted from the laser emitting portions 41a ′ and 41b ′. Is interrupted, the laser light receiving section 42
By reducing the amount of light received at a 'and 42b', the outer diameter of the DUT 1 can be measured.

Incidentally, when the object 1 has a small outer diameter, measurement using a pair of laser sensors is also possible. Further, when it is necessary to measure the absolute position coordinates of the sensor such as the bending of the DUT 1 with high accuracy, the laser positioning frame 43 needs to be positioned with high accuracy.
Further, a mechanism for indexing the DUT 1 from the side may be used. Further, a contact type displacement meter may be used instead of the laser sensor.

Next, the configuration of the thickness measuring means 50 will be described with reference to FIGS. The board thickness dimension measuring means 50 includes a horizontally movable frame 5 movable in the Y1 direction in the drawing.
1 is provided with an ultrasonic measuring device 52 for measuring a plate thickness, which is attached to a lower portion of the apparatus 1. The ultrasonic measuring device 52 measures the thickness of the DUT 1 by spraying the jet water JW onto the DUT 1 and detecting the ultrasonic waves generated at that time. Further, guide rollers 53a and 53b are attached to the horizontal moving frame 51. The opening angle of the guide rollers 53a and 53 is, for example, 120 °, and the guide rollers 53a and 53 are arranged so as to be able to contact and press the outer diameter of the DUT 1 at an optimum angle from above. That is,
The positional relationship between the guide rollers 53a and 53b and the ultrasonic measurement device 52 is optimized, and the gap between the surface of the DUT 1 and the ultrasonic measurement device 52 is optimized. The opening angles of the guide rollers 53a and 53b can be changed according to the outer diameter of the DUT 1.

The horizontal moving frame 51 is attached and fixed to the vertical moving frame 54. Vertical movement frame 5
4 can be moved in the Z1 direction in the figure by a cylinder 55, and can be indexed in the up-down direction. In order to press the guide rollers 53a and 53b against the DUT 1 and move the guide rollers 53a and 53b in the longitudinal direction while following the cross-sectional shape of the DUT 1, the driving pressure of the cylinder 55 is controlled in the up-down direction, and the spring is used in the horizontal direction. It is held by the elastic body.

The jet water supply device 60 includes a pump 62 for supplying the water stored in the water supply tank 61 to the ultrasonic measuring device 52. An indexing base 63 is arranged on the side surface of the vertical frame 24b of the straightening mechanism, and a water supply tank 61 with a jet water receiving container 65 mounted on an indexing table 64 that can move thereon is mounted.
The jet water is received, and the water can be guided into the tank 61. That is, the jet water blown from the ultrasonic measuring device 52 to the device under test 1 is received by the jet water receiving container 65 and can be naturally guided into the tank 61 by utilizing a height difference.

As described above, the outer diameter of the DUT 1 is measured by using the outer diameter measuring means 40 constituting the shape measuring mechanism, and further, by using the plate thickness measuring means 50, By measuring the thickness of the DUT 1, the inner diameter of the DUT 1 can be measured based on the difference between the outer diameter and the thickness.

Next, a correction method using the correction device according to the present embodiment will be described with reference to FIGS. First, the system configuration of the correction device according to the present embodiment will be described with reference to FIG. Note that the same reference numerals as those in FIGS. 1 to 8 indicate the same parts.

The control means 100 includes an outer diameter dimension measuring means 40
Further, the outer diameter dimension and the thickness dimension are measured by controlling the thickness dimension measuring means 50. The controller 100 inputs the outer diameter of the object measured by the outer diameter measuring means 40 and the thickness of the object measured by the thickness measuring means 50.

Further, the control means 100 controls the straightening press section 2
By controlling 0, correction such as bending of the measured object (corrected object) is performed. In this case, the support mechanism unit 00 is controlled to perform loading / unloading, clamping, and the like of the DUT. Here, as the support mechanism unit 00, FIGS.
, The rotary indexing positioning devices 9a and 9b, the actuators 15a and 1
5b, the cylinders 11a and 11b, and the displacement prevention mechanism 2
a, 2b and the vertical positioning mechanisms 4a, 4b.

Next, referring to FIGS. 10 and 11 to 15,
The operation of the straightening device according to the present embodiment will be described. FIG. 10 is a flowchart showing the operation of the straightening device according to one embodiment of the present invention.

In step 110 of FIG. 10, the control means 100 internally checks the automatic operation start state. Next, in step 112, the control unit 100
Raises one of the left vertical support cylinder 7a and the right vertical support cylinder 7b, or the left vertical positioning mechanism 4a and the right vertical positioning mechanism 4b, which are the product support mechanism in the support mechanism 00, and measures the object to be measured ( Object to be corrected)
Is loaded onto the straightening device.

Next, in step 116, the control means 100 controls the end clamp device 8 in the support mechanism 00.
a, 8b is used to grip and clamp the end of the product. Next, at step 118, the control unit 100
Are vertical positioning mechanisms 4a, 4b in the supporting mechanism 00.
And the product clamp is completed.

Here, referring to FIG. 11, a description will be given of a shape and dimension measurement state according to the present embodiment. FIG. 11 is a front view showing a shape and dimension measurement state in the straightening device according to one embodiment of the present invention. The same reference numerals as those in FIG. 1 indicate the same parts. When the product clamp is completed,
As shown in the figure, both ends of the DUT 1 are gripped from the inside by a left end clamp device 8a and a right end clamp device 8b. Also, the vertical positioning mechanisms 4a, 4b
Is in a lowered state as shown.

Next, the measurement process starts from step 120 in FIG. In step 120, the control means 100 automatically checks the automatic measurement start state.

Next, in step 122 and subsequent steps, the outer diameter of the product is measured. Therefore, in step 122, the control unit 100 controls the motor 2 in the support mechanism unit 00.
2 (FIG. 1) is driven to position the outer diameter measuring means 40 on the left side in the product longitudinal direction. The initial outer diameter measurement position positioned at this time is a position P1 shown in FIG. Here, assuming that the position of the left end portion of the DUT 1 as a product is P0, the position P1 is 15 degrees to the right from the position P0.
cm. In addition, P2 is further
This is a position 15 cm away from the position P1. Then, at this position P1, the control means 100 controls the cylinder 44 (FIG. 7) of the outer diameter dimension measuring means 40, and
a, 41b and the light receiving sections 42a, 42b, as shown by a two-dot chain line in FIG.
Is lowered to the position where it is sandwiched.

Next, in step 124, the control means 100, as shown in FIG.
Is used to measure the outer diameter of the DUT 1 and the distance from the laser dimension measurement device reference. After this measurement, the control means 10
No. 0 drives the motor 22 (FIG. 1) in the support mechanism unit 00 to position the outer diameter measuring means 40 at a position P2 in the right direction in the product longitudinal direction. Then, after the positioning is completed, the control means 100 again measures the outer diameter of the DUT 1 and the distance from the laser size measuring device reference using the outer diameter dimension measuring means 40. Thus, the control means 100
A predetermined distance (for example, 15 cm) is applied to the outer diameter measurement means 40
While moving, the outer diameter at each position is measured in the longitudinal direction of the DUT 1.

Next, in step 126, as shown in FIG. 11, the control means 100 controls the rotation indexing positioning devices 9a and 9b in the support mechanism 00 to index the rotation of the DUT 1. . In the present embodiment,
The DUT 1 is rotated 90 ° from the initial position.

Then, returning to step 124, the outer diameter of the DUT 1 and the distance from the laser dimension measuring device reference are measured using the outer diameter measurement means 40 with respect to each position in the longitudinal direction of the DUT 1. Measure each time. Further, in Step 126, the DUT 1 is further rotated by 90 °, and then, in Step 124, the outer diameter is measured.
In step 126, the DUT 1 is further rotated by 90 °, and thereafter, in step 124, measurement of the outer diameter is repeated. Thereby, at four rotation index positions of the object 1 at the angles of 0 °, 90 °, 180 °, and 270 °, the outside of the object 1 at each predetermined position in the longitudinal direction of the object 1 is determined. Measure the diameter and the distance from the laser dimension measuring device standard.

Next, in step 128, the control means 100 controls the cylinder 44 (FIG. 7) of the outer diameter dimension measuring means 40 so that the light emitting portions 41a and 41b and the light receiving portion 42 are controlled.
The laser measurement head consisting of a and 42b is raised. Then, in step 130, the control means 100 drives the motor 22 (FIG. 1) in the support mechanism unit 00 to return to the measurement start position, and ends the outer diameter measurement.

After measuring the dimensions of the product outer diameter, step 1
From 32 onward, the thickness of the product is measured. In step 132, the control means 100
Drives the motor 22 (FIG. 1) in the support mechanism unit 00 to position the plate thickness measurement means 50 at the position P1 on the left side in the product longitudinal direction. Then, at this position P1, the control means 100 controls the cylinder 55 (FIG. 8) of the sheet thickness measuring means 50 to move the ultrasonic sheet thickness measuring head including the ultrasonic measuring device 52 and the guide rollers 53a and 53b. As shown in FIG. 8, it is lowered to a position close to the DUT 1.

Next, in step 134, as shown in FIG.
Is used to measure the thickness of the DUT 1. After the measurement is completed, the control unit 100 controls the motor 2 in the support mechanism unit 00.
2 (FIG. 1) to position the plate thickness measuring means 50 at the right position P2 in the longitudinal direction of the product, and again use the plate thickness measuring means 50 to measure the thickness of the DUT 1. Is measured. In this way, the control unit 100 moves the plate thickness dimension measuring unit 50 by a predetermined distance (for example, 15 cm) at the same position as the outer diameter measurement position in the longitudinal direction of the DUT 1. Measure the plate thickness at the position.

Next, in step 136, as shown in FIG. 11, the control means 100 controls the rotation indexing positioning devices 9a and 9b in the support mechanism 00 to index the rotation of the DUT 1. . In the present embodiment,
The DUT 1 is rotated 90 ° from the initial position.

Thereafter, the flow returns to step 134, and the thickness of the DUT 1 is measured at each position in the longitudinal direction of the DUT 1 by using the thickness measuring means 50.
Further, in Step 136, the DUT 1 is further rotated by 90 °, then, in Step 124, the plate thickness is measured, and in Step 126, the DUT 1 is further rotated by 90 °, Thereafter, in step 124, the measurement of the plate thickness is repeated. Thereby, the angles 0 °, 90 °, 180 °,
At the four rotation index positions of 270 °, the plate thickness of the DUT 1 at each predetermined position is measured in the longitudinal direction of the DUT 1.

Next, in step 138, the control means 100 controls the cylinder 55 (FIG. 8) of the thickness measuring means 50 to raise the ultrasonic thickness measuring head.
Then, in step 140, the control means 100
By driving the motor 22 (FIG. 1) in the support mechanism 00,
Return to the measurement start position, and the thickness measurement ends.

In the above-described example, the measurement of the outer diameter of the object to be measured and the measurement of the plate thickness are performed individually, but they may be performed simultaneously. That is, as shown in FIG. 6, the laser outer diameter measurement head and the ultrasonic plate thickness measurement head are assembled to the shape measurement frame FR. Then, the distance between the laser outer diameter measurement head and the ultrasonic plate thickness measurement head, for example,
By setting the length to 30 cm, the thickness measurement at the position P1 can be simultaneously performed while measuring the outer diameter at the position P3 shown in FIG.

During the measurement of the outer diameter of the laser beam and the measurement of the thickness of the ultrasonic plate, the upper and lower support cylinders 7a and 7b and the upper and lower positioning mechanisms 4a and 4b, which are correction support mechanisms, are provided.
Is a distant position below the DUT 1, that is, the DUT 1
Has been released from below, and when performing shape measurement,
Alternatively, when both ends are grasped, it is possible to arbitrarily move and position below the measured object.

Next, in step 150 of FIG.
Since the control means 100 needs to measure the inner diameter dimension of the product, the control means 100 calculates the inner diameter dimension by calculating the measured plate thickness dimension and outer diameter dimension. Then, after the completion of the dimension measurement, it is checked whether or not the measured data has no problem. For example, when measuring a pipe having an outer diameter of 150 mm, the outer diameter is 3 mm.
If the data is abnormal such as 00 mm, it is assumed that there is a problem in the measurement. Then, in step 150, if there is a problem with the measurement data, the control unit 100 returns to step 130, performs the measurement process again, and performs measurement again. If the measurement result clears the preset tolerance, the product is unloaded after step 160, and the process ends. Further, when the measurement result is out of tolerance, the process proceeds to the correction process of step 152 and subsequent steps.

Here, the unloading step after step 160 will be described. In step 160, the control means 100 controls any one of the left vertical support cylinder 7a and the right vertical support cylinder 7b, or the left vertical positioning mechanism 4a and the right vertical positioning mechanism 4b, which are the product support mechanism in the support mechanism 00. Raise and support the product that is the measured object (corrected object). Next, in step 162, the control means 100
The unloading of the product is completed by releasing the gripping of the end of the product by the end clamping devices 8a and 8b in 0 and unclamping.

Next, if correction is necessary, step 1
At 52, the control means 100 sets a correction method. In step 154, the control unit 100
Sets the correction conditions.

Here, a correction method and a method of setting correction conditions in the present embodiment will be described with reference to FIGS. FIG. 12 and FIG. 13 are explanatory diagrams of setting of a correction method and correction conditions in the correction device according to the embodiment of the present invention. FIG. 12 shows an example of bending occurrence and inflection point of a complex-shaped product. As shown in FIG. 12, when the DUT 1 has a complicated bend,
The inflection point 1, the inflection point 2, the inflection point 3, and the inflection point 4 are calculated from the shape and dimension measurement results. For the end, the distances L1, L2, L3, and L4 between the end and the inflection point, and the line between the inflection point and the inflection point between them are calculated. In the illustrated example, L3>L4>L2> L
Let it be 1. In such a case, as the correction method in step 152 in the present embodiment, a method including a correction procedure in which correction is performed in order from the one with the largest distance is taken.

Next, FIG. 13 shows an example of a correction condition and a correction method between the inflection points of a complex-shaped product. Step 15
The correction conditions in 4 include a correction position, a correction support position, a pushing amount, and the like. Therefore, as the correction support position when correcting the inflection point 3 shown in FIG. 11, the left correction support dies 3a and 3b are positioned and supported at the inflection point 2 and the inflection point 4, respectively. As the correction position, the correction press die 27 is positioned at the inflection point 3 and correction is performed. It is assumed that the pushing amount is determined according to the distance L3. As an operation method, there is a correction pattern.
That is, after the inflection point 3 is pushed in by the correction indentation mold 27 and corrected, the position of the indentation mold 27 is changed to the indentation mold 27 ′,
The indentation pattern 27 "is used as a correction pattern for performing correction by shifting in the longitudinal direction. By shifting the correction position, the bending moment distribution in the longitudinal direction of the DUT 1 can be changed, and straightening can be performed. Become.

Next, a correction process is performed after step 170 in FIG. In step 170, the control means 100 automatically checks the automatic correction process start state. Next, in step 172, the control unit 100
Is determined based on the correction method and the correction conditions obtained in steps 152 and 154.
The rotation indexing positioning devices 9a and 9b in the above are driven, and as shown in FIG. 13, the correction object (measurement object) 1 is moved so that the inflection point 3 which is the first correction position faces directly upward. Rotate to determine the correction angle. Next, in step 174, the control unit 100 drives the motors 16a and 16b in the support mechanism unit 00 as shown in FIG.
The correction support frames 5a and 5b are moved, and the correction support mold 3 is moved.
a and 3b are respectively positioned at predetermined correction support positions. Further, the motor 22 in the support mechanism unit 00 is driven to move the correction press means 20, and the correction press die 34 is positioned at a predetermined correction position.

Next, in step 176, the control means 100 controls the left and right upper and lower support cylinders 7a and 7a as the product support mechanism in the support mechanism section 00.
b, or one of the left and right vertical positioning mechanisms 4a and 4b is raised to support the product to be corrected. Next, in step 178, the control means 100 releases the gripping of the product end by the end clamping devices 8a and 8b in the support mechanism unit 00 and unclamps.

Next, in step 180, the control means 100 controls the vertical positioning mechanism 4 in the support mechanism section 00.
a, 4b are lowered. Next, in step 182, the control means 100 drives the displacement prevention mechanisms 2a and 2b in the support mechanism unit 00 to pinch the object to be corrected 1 from both sides to restrain the rotational displacement. Next, in step 190, a correction process is performed.

FIG. 14 shows steps 170 to 19
0 shows the arrangement status of the devices when the correction process is performed. The same reference numerals as those in FIGS. 1 to 11 indicate the same parts. When switching from the shape / dimension measurement process to the correction process, first, a correction method, a correction condition, and the like are automatically set based on the shape / dimension measurement results, and each mechanism is positioned. Next, both ends of the DUT 1 are unclamped, and the left support table 6a and the right support table 6b are unclamped.
Are moved forward, the left and right upper and lower support cylinders 7a and 7b are raised, and the clamps 8a and 8b at both ends are released and delivered. In addition, delivery using the left and right vertical positioning mechanisms 4a and 4b is possible. According to each delivery method, after the DUT 1 is mounted on the left and right straightening support dies 3a and 3b, straightening is performed. At the time of straightening, the object to be measured 1 is turned in the rotation direction by straightening in order to straighten the bend of the object to be measured 1.
a, a mechanism for clamping and clamping the DUT 1 by a right displacement prevention mechanism 2b.

Here, referring to FIG.
The details of the correction process will be described. FIG. 15 is a flowchart illustrating a process of a correction process using the correction device according to the present embodiment.

First, in step 191, the control means 100 operates the straightening press cylinder 23 in the straightening press means 20 to lower the straightening die 34.
Next, in step 192, the control means 100 uses the contact point detection load cell 36 (FIG. 5) of the correction press unit 30 to determine, based on the detected pressure, the point at which the surface of the correction target 1 has come into contact with the surface of the correction target 1 or a certain setting. The position with the applied pressing force is detected. This point or position is, in the example shown in FIG.
Height H to inflection point 3 which is a correction position with respect to a straight line connecting correction support points 3a and 3b supporting inflection point 2 and inflection point 4
Detected as 1.

Next, in step 193, when the control means 100 presses the area within the preset correction amount range, the control section 100 determines the amount of press-in and the correction force with high accuracy in real time using the contact point detection load cell 36. And the yield point of the object to be corrected 1 is detected. The yield point changes depending on the mechanical properties of the object to be corrected 1 and the correction conditions. In addition, in the so-called elastic region where the correction press force is released to return to the original state, the pushing amount and the correction force change in a proportional relationship. Further indentation reaches a plastic region where deformation begins, and the relationship between the amount of indentation and the correction force breaks the proportional relationship. A point at which the proportional relationship is broken is regarded as a deformation start point, that is, a yield point, and the correction amount is determined based on the point.

Next, in step 194, the control means 100 performs correction by the target correction amount. Next, in step 195, after securing the target correction amount, the control means 100 returns the correction press to the first correction start point. Next, at step 196, the control means 10
In the case of 0, the correction press is brought into contact with the object to be corrected 1 again, and the actually corrected deformation amount is detected.

Then, in step 197, the control means 100 determines whether or not the correction has been performed as intended. If there is no problem, the correction process ends, and the process proceeds to step 200 in FIG. If there is a problem, step 198
In step, the control means 100 reviews the correction condition, and in step 199, sets the target correction condition again and repeatedly executes the target correction condition. As described with reference to FIGS. 12 and 13, the correction is performed for each of a plurality of inflection points.

Next, in step 200 of FIG.
The control unit 100 checks the correction status and determines whether the correction has been performed as intended. If the correction is OK, the flow proceeds to the measurement process after step 120, and the measurement is performed again. When the tolerance is cleared in step 150, the flow proceeds to step 160 to unload the object to be corrected. In the case of NG, step 21
After 0, the process proceeds to the correction process again.

After step 210, a product change process is executed. In step 210, the control unit 1
00 internally checks a product change start state. Next, in step 212, the control unit 100
Raises one of the left and right upper and lower support cylinders 7a and 7b, or the left and right upper and lower positioning mechanism 4a and the right and right upper and lower positioning mechanism 4b, which are the product support mechanisms in the support mechanism 00.

Next, in step 214, the control means 100 controls the end clamp device 8 in the support mechanism 00.
a, 8b is used to grip and clamp the end of the product. Next, at step 216, the control unit 100
Are vertical positioning mechanisms 4a, 4b in the supporting mechanism 00.
And the product clamp is completed.

Next, at step 218, the control means 100 measures the outer diameter of the object to be measured, similarly to the processing at steps 120 to 130. Note that, here, only the outer diameter of the object to be measured is measured, and the thickness measurement is not performed. Next, at step 220, the control means 1
In step 00, correction conditions are set in the same manner as in step 154. Then, the process returns to step 170 and thereafter, and the correction process is executed again.

The correction condition data for correcting the object to be measured and the change amount data due to the correction are sequentially stored in a correction data storage area, and a system having a learning function is provided. Deformation and bending deformation can be efficiently and automatically corrected.

As described above, according to the present embodiment, after the object to be measured is mounted on the correction device according to the present embodiment,
Since the measurement and the correction can be automatically performed by the shape measurement step, the correction step, and the holding step between the steps, the work of setting up and holding the object to be measured becomes unnecessary, and the number of steps can be reduced. Also. Even in the case of a relatively long and heavy object, the straightening device according to the present embodiment can automate the operation, thereby improving work efficiency.

Further, the measured object such as a mold steel material and a pipe material is as follows.
Due to processing during or during manufacturing, complicated bending deformation often occurs in the cross-sectional shape and longitudinal direction of the measured object, but even in such a case, it has complicated bending and warping, Further, the shape and dimensions such as the outer diameter, the inner diameter, the plate thickness, and the bending of the measured object having the deformed cross-sectional shape can be measured automatically and with high accuracy. Further, based on the measurement result, the apparatus has a function of setting a correction method such as a correction procedure and a correction pattern and a function of setting correction conditions, thereby enabling automatic correction.

Further, the outer diameter of the object to be measured is measured by using a laser beam with a laser measuring head having a laser emitting section and a receiving section sandwiching the cross section of the object to be measured. Since the jet thickness is measured by flowing jet water over the surface of the object to be measured, the outer diameter and the inner diameter of the object to be measured can be measured at the same time, the measurement tact is shortened, and another process is performed. Conventionally, the setup change is unnecessary.

The laser measuring head and the ultrasonic measuring head are respectively mounted on the same positioning drive mechanism (via a frame frame FR for shape measurement).
It is assembled to frames 21 and 24) driven by a motor 22, and can be indexed and positioned with respect to the object to be measured as necessary. Dimensions can be measured with high accuracy. Further, the measuring device can be made compact.

The ultrasonic measuring head is provided with guide rollers 53a and 53b, which can follow the object to be measured in a direction perpendicular to the longitudinal direction thereof, so that a certain distance from the surface of the object to be measured is secured. It is possible, positioning is easy, and plate thickness measurement accuracy can be improved. Also,
By controlling the pressing force when the guide roller is pressed against the surface of the object to be measured, the mechanism can follow the length of the object to be measured, so that the surface of the object having complicated deformation and the ultrasonic measurement sensor Can be made constant, and the positioning of the measurement point can be performed stably.

Further, the jet water supply device 60 has a water supply function of flowing jet water for ultrasonic measurement to the surface of the object to be measured, and receives the jet water flowing from the surface of the object to be measured.
Since it has a function of collecting, it is possible to measure the outer diameter and the thickness of the object having complicated deformation with high accuracy. Further, water treatment can be easily performed.

Also, the correction support mechanism is mounted on the base overhanging frame and the upper part of the frame is movable, whereas the correction support mechanism is disposed under the overhang frame, and the C-shaped frame structure allows the correction support mechanism to pass through. The straightening reaction force generated by straightening between the straightening support mechanism and the straightening press mechanism during straightening is converted into a compressive force in the thickness direction of the base overhang frame, and the straightening press mechanism The bending moment applied to the frame by the correction reaction force can be reduced. Further, the bending moment can be equalized, and the deformation of the correction mechanism section frame can be suppressed as much as possible.

When correcting an object having a complicated bend or warp, an inflection point of the entire bend of the object is calculated from the shape measurement result, and an optimum inflection point is determined from a plurality of inflection points. After setting the procedure and combination, support the inflection point, and start the correction from the maximum or near the bending change amount to the supported inflection point, and sequentially in the longitudinal direction of the DUT as necessary. After correcting the bending between the inflection points while shifting and correcting the correction position, sequentially moving to the next inflection point to correct the bending, thereby correcting a complicated bending with high accuracy and efficiency. Can be.

Further, when correcting the cross section or the entire bend of the measured object based on the result of arithmetic processing based on the measurement result of the outer diameter dimension or the plate thickness dimension of the measured object, the straightening press in contact with the measured object when the straightening press is in contact with the measured object. Detects the start position, continuously detects the amount of pushing of the straightening press and the pushing load, and automatically calculates the point (plastic deformation starting point) at which the measured object changes from the elastic region to the plastic region based on the data. This makes it easier to detect the starting point of plastic deformation. Further, the correction target value is determined based on the calculation result and the measured object size measurement result, and the correction is performed. In the correction, the actual deformation amount is detected, and the correction is performed while always comparing the correction target value. Thereby, the correction work can be performed automatically and efficiently.

Further, based on the sectional dimensions and the bending dimensions calculated from the measurement results of the shape and dimensions of the object to be measured, and the allowable dimensions set in advance, the correction procedure, correction position and correction position in the case of complex correction involving several corrections. By calculating the correction amount, the correction support position corresponding to the bent shape, and the correction condition such as the position where the correction is performed by the correction press, the correction work can be performed efficiently.

[0096]

According to the present invention, the workability of the correction device including the measuring device can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a straightening device according to an embodiment of the present invention.

FIG. 2 is a plan view of a straightening device according to an embodiment of the present invention.

FIG. 3 is a right side view of the straightening device according to one embodiment of the present invention.

FIG. 4 is a left side view of the straightening device according to the embodiment of the present invention.

FIG. 5 is a sectional view of a straightening press unit used in the straightening device according to one embodiment of the present invention.

FIG. 6 is a sectional view of a shape measuring mechanism used in the straightening device according to one embodiment of the present invention.

FIG. 7 is a front view of an outer diameter measurement unit used in the straightening device according to one embodiment of the present invention.

FIG. 8 is a front view of a sheet thickness measuring means used in the straightening device according to one embodiment of the present invention.

FIG. 9 is a block diagram showing a system configuration of a correction device according to an embodiment of the present invention.

FIG. 10 is a flowchart showing the operation of the straightening device according to one embodiment of the present invention.

FIG. 11 is a front view showing a shape and dimension measurement state in the straightening device according to one embodiment of the present invention.

FIG. 12 is an explanatory diagram of setting of a correction method and correction conditions in a correction device according to an embodiment of the present invention.

FIG. 13 is an explanatory diagram of setting of a correction method and correction conditions in a correction device according to an embodiment of the present invention.

FIG. 14 is an explanatory diagram of an arrangement state of a device when a correction process is performed using the correction device according to the embodiment of the present invention.

FIG. 15 is a flowchart illustrating a process of a correction process using the correction device according to the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Measurement object 2a, 2b ... Displacement prevention mechanism 3a, 3b ... Correct support type 4a, 4b ... Vertical positioning mechanism 5a, 5b ... Correct support frame 6a, 6b ... Support table 7a, 7b ... Vertical support cylinder 8a, 8b ... End clamping device 9a, 9b ... Rotation indexing positioning device 10a, 10a ... Moving table 11a, 11b, 12a, 12b ... Cylinder 13 ... Mounting base 14 ... Position adjustment table 15a, 15b ... Driving actuator 16a, 16b ... Motor 17 ... Base Saw 18a, 18b Base overhang frame 19a, 19b Rail 20 ... Straightening press means 21, 24 ... Frame 22 ... Motor 23 ... Straightening press cylinder 27 ... Straightening press die 30 ... Straightening press part 31 ... Rod block 32 ... Guide Block 33: Guide frame 34 Correction pressing mold 35 ... Load cell 36 ... Contact point detection load cell 37 ... Anvil shaft 38 ... Spring 40 ... Outer diameter measurement means 41 ... Laser emitting parts 42a, 42b ... Laser receiving part 43 ... Laser positioning frame 44 ... Cylinder 50 ... Plate Thickness measuring means 51 Horizontal moving frame 52 Ultrasonic measuring device 53a, 53b Guide roller 54 Vertical moving frame 55 Cylinder 60 Jet water supply device 61 Water supply tank 62 Pump 65 Jet water container FR … Frame frame for shape measurement

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) G01B 17/02 G01B 17/02 Z 21/00 21/00 H H01S 3/00 H01S 3/00 F (72) Inventor Yasuo Kimura 3-1-1, Kochi-cho, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd., Hitachi Plant (72) Inventor Go Taki 3-1-1, Kochi-cho, Hitachi-shi, Hitachi-shi, Ibaraki F Terms (Reference) 2F065 AA26 AA46 BB08 BB11 FF02 GG04 HH05 HH15 JJ02 JJ25 MM03 PP11 QQ29 TT08 2F068 AA28 BB09 DD16 FF01 GG05 GG09 JJ12 KK16 LL02 SS09 TT07 2F069 AA02 GG02 GG07 GG07 GG07 HH02 JJ20 YY13

Claims (14)

[Claims] 1. An outer diameter measuring means for measuring an outer diameter of an object to be measured, a sheet thickness measuring means for measuring a thickness of the object to be measured, and a correction for correcting a bending of the object to be measured. Pressing means, a support mechanism for supporting the object to be measured, controlling the outer diameter measurement means and the support mechanism to measure the external dimensions of the object to be measured, The support mechanism is controlled to measure the plate thickness of the object to be measured, a correction method and correction conditions are set based on the measured outer diameter and plate thickness, and the correction press means and the support mechanism are set. Control means for controlling a section to correct the bending of the object to be measured. 2. The correction device according to claim 1, wherein said support mechanism includes support means for supporting both ends or a bottom portion of said object to be measured, and index positioning means for calculating and positioning a position of said object to be measured. And, at the time of the correction of the measured object, while comprising a correction support means that supports the measured object at a correction support position and can be positioned at an arbitrary position, using the support means and the indexing positioning means,
A straightening device, wherein the object to be measured is changed. 3. The correction device according to claim 2, wherein the support mechanism further includes a restraining means for restraining the measured object to prevent a displacement when the measured object is corrected. And straightening equipment. 4. The straightening apparatus according to claim 1, wherein said outer diameter dimension measuring means and said plate thickness dimension measuring means are mounted on said straightening press means. 5. The straightening device according to claim 1, wherein the straightening press means is mounted on an upper portion of the base portion overhanging frame, and the straightening press mechanism is provided on the straightening support mechanism portion capable of moving the upper portion of the frame. It is arranged at the lower part, and has a structure in which the correction support mechanism can pass through with a C-shaped frame structure, and at the time of correction, corrective reaction force generated by correcting between the correction support mechanism and the correction press mechanism is used. A straightening device for converting a compressive force in a thickness direction of a base overhang frame. 6. The straightening device according to claim 1, wherein the control means is configured to calculate an outer diameter and a thickness of the object to be measured by the outer diameter measurement means and the thickness measurement means. A straightening device comprising: detecting an inflection point of a bending of the whole object to be measured; and starting correction from a vicinity of an inflection point having a maximum bending change amount among a plurality of inflection points. 7. The correction device according to claim 6, wherein the control means performs correction while sequentially shifting the position of the measured object in the longitudinal direction from the point where the correction is started. 8. The straightening device according to claim 1, wherein the control means determines the object to be measured based on a straightening start position at which the straightening press means is in contact with the object to be measured, a pushing amount and a pushing load of the straightening press. A correction point detecting a point at which the elastic area changes from a plastic area to a plastic area, determining a correction target value from these detection results and the measurement result of the measured object, and performing correction. 9. A method for correcting an object to be measured, wherein an outer diameter and a thickness of the object to be measured are measured, and the outer diameter and the thickness of the object to be measured are measured. A correction method comprising: detecting an inflection point of a bending of the entire measurement object; and starting correction from a vicinity of an inflection point having a maximum bending change amount among a plurality of inflection points. 10. A laser measuring head having a laser emitting section and a light receiving section disposed with a cross section of the object to be measured therebetween, and measuring an outer diameter of the object to be measured by transmitting a laser beam; An ultrasonic measurement head for jetting jet water onto the surface of the object and measuring a thickness of the object by ultrasonic waves emitted from the object. 11. A measuring apparatus according to claim 10, wherein said laser measuring head and said ultrasonic measuring head are assembled to a same positioning drive mechanism. 12. The measuring device according to claim 10, further comprising a jet water supply device for supplying water to said ultrasonic measuring head and receiving and recovering water from the surface of the object to be measured. Measuring device. 13. The measuring apparatus according to claim 10, wherein the ultrasonic measuring head is capable of following and moving in a direction perpendicular to a length direction of the measured object when measuring a thickness of the measured object. A measuring device comprising: a guide roller configured to press the guide roller against the surface of the object to be measured so as to follow the length direction of the object to be measured. 14. A measuring method for jetting jet water onto a surface of an object to be measured by using an ultrasonic measuring head, and measuring the thickness of the object to be measured by ultrasonic waves emitted from the object to be measured. When measuring the thickness of the object to be measured, the ultrasonic measurement head uses a guide roller that can move in a direction perpendicular to the length direction of the object to be measured, and a guide roller is provided on the surface of the object to be measured. A measuring method characterized by being able to follow the length direction of the object to be measured by pressing.