KR101411865B1 - Apparatus for measuring shape of material - Google Patents

Abstract

The present invention relates to a workpiece shape measuring apparatus, and more particularly, to a workpiece shape measuring apparatus which includes a multi-point contact portion which is moved at an end of a workpiece to be conveyed and contacts the side surface of the workpiece at three or more mutually spaced points, And a shape measuring unit for detecting a side surface shape of the workpiece by sensing a linear displacement of an end portion of the multi-point contact portion moved in the width direction of the workpiece.

Description

[0001] APPARATUS FOR MEASURING SHAPE OF MATERIAL [0002]

The present invention relates to a work shape measuring apparatus, and more particularly, to a work shape measuring apparatus for measuring a side shape of a work being conveyed.

Typical steelmaking consists of a steelmaking process to produce molten iron, a steelmaking process to remove impurities from molten iron, a casting process to transform solid iron into solid, and a rolling process to make iron into steel or wire.

In the rolling process, the slab is charged into a heating furnace and reheated at a temperature suitable for rolling (1100 to 1300 ° C) to extract the product. The product is then subjected to a tensile rolling and a thickness rolling through a roughing mill. And a rolling process.

Related prior art is disclosed in Korean Patent Publication No. 523099 (registered on October 13, 2005, entitled "Method of Measuring Cross-sectional Shape of Wire Rod Material").

An object of the present invention is to provide a material shape measuring apparatus which can measure a camber amount of a material and monitor it in real time so as to make the shape of the material nonuniform or to promptly identify factors causing cambers in the material .

A workpiece shape measuring apparatus according to one aspect of the present invention includes: a multi-point contact portion that is moved at an end of a workpiece to be conveyed and contacts a side surface of the workpiece at three or more spaced apart points; A cylinder portion that moves the multi-point contact portion to the workpiece side and forms an operating pressure to contact the side surface of the workpiece; And a shape measuring unit for detecting a side displacement of the workpiece by detecting a linear displacement of the end of the multi-point contact unit moved in the width direction of the workpiece.

In the present invention, the multi-point contact portion may include: a pivotal bar that is axially coupled to an end portion of the cylinder portion so as to be rotatable; And a contact roller which is provided at both ends of the pivot bar and is in contact with a side surface of the material and rotated in conjunction with the progress of the material.

In the present invention, the cylinder part may include: a cylinder arranged along a conveying direction of the material; A rod coupled to the multi-point contact portion at an end thereof, moved to the outside of the cylinder by the hydraulic pressure in the cylinder and contacting the multi-point contact portion with the material; And a pressure sensor that senses the hydraulic pressure in the cylinder and detects whether the multi-point contact portion is in contact with the work.

In the present invention, the shape measuring unit may include a displacement sensor installed inside the cylinder, for measuring a displacement of the rod; And a calculation unit calculating a displacement difference of the rod sensed by the displacement sensor and calculating a camber amount of the work side surface.

In the present invention, the cylinder portion may include a first cylinder portion, a second cylinder portion, and a third cylinder portion that are sequentially disposed along the conveying direction of the workpiece, and the calculating portion may include: A difference between a displacement of the rod detected and a displacement of the rod detected by the displacement sensor provided in the third cylinder and a displacement of the rod detected by the displacement sensor provided in the second cylinder And calculating a camber amount of the material.

In the present invention, the multi-point contact portion is provided so as to be opposed to both sides of the work, and is contacted to both sides of the work with the same contact pressure.

In the present invention, the arithmetic unit calculates a camber amount of the workpiece, which is obtained by averaging the camber amount calculated at the multi-point contact portion provided at one side of the workpiece and the camber amount calculated at the multi-point contact portion provided at the other side of the workpiece, .

In the present invention, the amount of camber of the material, that is, the side surface shape of the material, can be calculated and monitored in real time from the displacement difference of each of the multi-point contact portions contacting the side surface of the material at a plurality of points.

Accordingly, the present invention enables the operator to quickly check whether the camber of the material has occurred and the amount of the camber in real time, thereby promptly eliminating the cause of the camber, ensuring the efficiency of the process due to the coping, reliability of the product, .

Further, the present invention can prevent the deterioration of measurement reliability due to optical and thermal influences caused by steam or water around the material by directly contacting the side surface of the material, thereby improving the accuracy of the material shape measurement .

Further, the present invention can be easily positioned between the roller members of the transfer table, so that it can be easily combined with existing facilities.

1 is a perspective view showing an installation state of a work shape measuring apparatus according to an embodiment of the present invention.
2 is a plan view for explaining an example of using a work shape measuring apparatus according to an embodiment of the present invention.
3 is a perspective view showing a work shape measuring apparatus according to an embodiment of the present invention.
4 is a cross-sectional view of a work shape measuring apparatus according to an embodiment of the present invention.
5 is a conceptual diagram illustrating a method of calculating a camber amount of a work using a work shape measuring apparatus according to an embodiment of the present invention.

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

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view showing an installation state of a work shape measuring apparatus according to an embodiment of the present invention, FIG. 2 is a plan view illustrating an example of using a work shape measuring apparatus according to an embodiment of the present invention .

FIG. 3 is a perspective view showing a work shape measuring apparatus according to an embodiment of the present invention, and FIG. 4 is a sectional view showing a work shape measuring apparatus according to an embodiment of the present invention.

5 is a conceptual diagram illustrating a method of calculating a camber amount of a work using a work shape measuring apparatus according to an embodiment of the present invention.

1 and 2, the work shape measuring apparatus 300 according to an embodiment of the present invention includes a multi-point contact unit 310, a cylinder unit 320, and a shape measuring unit 330, 10) is measured.

The camber refers to a phenomenon in which the width of the rolled material is bent due to the difference in elongation, and the amount of camber refers to the degree to which the rolled material is warped in the width direction.

The material 10 is placed on one side (right side in FIG. 2) by rotation of the roller member while being placed on the upper surface of the transfer table 20 having a structure in which a plurality of roller members are arranged along the conveying direction of the material 10 Lt; / RTI >

The multi-point contact portion 310 is moved to the side of the workpiece 10 to be transported and contacts the side surface of the workpiece 10 at three or more mutually spaced points.

Referring to FIGS. 3 and 4, the multi-point contact portion 310 according to an embodiment of the present invention includes a rotation bar 311 and a contact roller 312.

The rotation bar 311 is axially coupled to the end of the rod 322 of the cylinder part 320 such that the intermediate part thereof is rotatable.

The contact roller 312 has a roller shape and is provided with a pair of paired rollers 311, respectively.

The contact roller 312 rotates (rolls) in association with the progress of the workpiece 10 in a state where the outer peripheral portion is in friction contact with the side surface of the workpiece 10 being transported.

When the rotation bar 311 is formed in a linear shape, the rotation bar 311 has a rotational displacement of 180 ° until both ends of the rotation bar 311 contact the rod 322, respectively.

When the elastic spring 313 is provided on one side portion (the right side portion in Fig. 2) of the pivoting bar 311 facing the feeding direction of the blank 10, the pivoting bar 311 moves in a direction opposite to the feeding direction of the blank 10 (The left side in Fig. 2).

One end of the elastic spring 313 is connected to the rotation bar 311 and the other end of the elastic spring 313 is connected to the rod 322.

By providing the elastic spring 313, the direction of the pivoting bar 311 can be maintained to be directed toward the workpiece 10 entering the multi-point contact portion 310 side so that the workpiece 10 enters the multi-point contact portion 310 side, It can be prevented that it is caught on the end of the base 311.

One side of the pair of contact rollers 312 is first brought into contact with the side surface of the workpiece 10 and pushed by the workpiece 10 so that the turning bar 311 is moved to the side of the workpiece 10 And the rest of the contact rollers 312 are brought into contact with the workpiece 10.

The impact force acting on the contact roller 312 due to the collision with the workpiece 10 can be attenuated or dispersed as the plurality of contact rollers 312 sequentially contact the side surface of the workpiece 10 as described above.

The cylinder portion 320 is provided to be spaced from the side surface of the workpiece 10 and moves the multi-point contact portion 310 toward the workpiece 10 while the length thereof is extended toward the workpiece 10 side.

The cylinder portion 320 forms an operating pressure for contacting and pressing the multi-point contact portion 310 at a predetermined pressure to the side surface of the work 10. [

The cylinder part 320 may include a first cylinder part 320-1 and a second cylinder part 320-3 that are sequentially disposed along the conveying direction of the material 10 (right side in FIG. 2) 2, and a third cylinder 320-3.

The first, second and third cylinder portions 320-1, 320-2 and 320-3 are arranged in parallel to the conveying direction of the material 10, and the first, second and third cylinder portions 320-1, 320- 2, and 320-3 are positioned corresponding to points A, B, and C of the workpiece 10, respectively.

The multi-point contact portion 310 connected to each of the first, second and third cylinder portions 320-1, 320-2 and 320-3 includes first, second and third cylinder portions 320-1, 320-2 and 320- 3, are brought into contact with the points A, B, and C of the work 10, respectively.

The cylinder part 320 according to an embodiment of the present invention includes a cylinder 321, a rod 322, and a pressure sensor 323.

The cylinders 321 are arranged along the conveying direction of the work 10.

The rod 322 is moved to the inside and outside of the cylinder 321 by the hydraulic pressure inside the cylinder 321. [

The rod 322 is moved to the outside of the cylinder 321 and the multi-point contact portion 310 is brought into contact with the workpiece 10 at the end of the rod 322.

When the workpiece detection sensor 340 for detecting whether the workpiece 10 enters the cylinder 320 is installed to detect the entry of the workpiece 10 toward the multi-point contact portion 310, .

The pressure sensor 323 senses the hydraulic pressure inside the cylinder 321 and detects whether or not the multi-point contact portion 310 is in contact with the workpiece 10.

It is possible to confirm whether or not the multi-point contact portion 310 is in contact with the workpiece 10, by comparing the pressure sensed by the pressure sensor 323 with the set pressure.

The set pressure is specified in a pressure range that can be formed inside the cylinder 321 in a state where the multi-point contact portion 310 is in pressure contact with the work 10.

When the pressure detected by the pressure sensor 323 becomes equal to or higher than the set pressure, it is determined that the multi-point contact portion 310 is in contact with the workpiece 10 and the supply of the high-pressure fluid into the cylinder 321 is stopped, The movement of the rod 322 can be stopped.

The shape measuring unit 330 detects a linear displacement of the end of the multi-point contact unit 310 moved in the width direction of the workpiece 10, that is, in the direction perpendicular to the conveying direction of the workpiece 10 So that the side surface shape of the workpiece 10 is detected.

The shape measuring unit 330 according to an embodiment of the present invention includes a displacement sensor 331 and an arithmetic unit 333.

The displacement sensor 331 is installed inside the cylinder 321 and measures displacement (movement amount) of the rod 322. [

The calculating unit 333 compares the displacement difference of the rod 322 sensed by the displacement sensor 331 provided in each of the plurality of cylinders 321 and calculates the amount of camber on the side of the material 10.

Next, with reference to FIGS. 2 and 5, a method of measuring the amount of camber of the workpiece 10 using the workpiece shape measuring apparatus 300 according to an embodiment of the present invention will be described .

The first, second and third cylinder portions 320-1, 320-2 and 320-3 are simultaneously operated while the material detection sensor 340 detects the entry of the workpiece 10, The end of the rod 322 provided in each of the first and second elastic members 320-1, 320-2, and 320-3 is moved to the workpiece 10 side.

At this time, the first, second, and third multi-point contact with the cylindrical section 310 A (x _1, y ₁₎ on the y ₀ coupled to an end of the rod 322 of the (320-1, 320-2, 320-3) _{, B (x 2, y 2} ), respectively, is moved to the C (x _3, y ₃₎ are contacted to the side of the material 10.

Since the displacements of the multi-point contact portion 310 and the rod 322 are equal to each other, the amount of camber of the workpiece 10 can be calculated from the displacement of the rod 322.

Operation unit 333 includes a first displacement of the rod 322 of the cylinder portion (320) (Δy ₁₎ and the third displacement of the rod 322 of the cylinder portion (320) (Δy ₂₎ the average value ((Δy ₁ + Δy ₂₎ / ₂₎ and a second _{({(Δy 1 + Δy 2} ) / 2} of the displacement (Δy ₃₎ of the rod (322) -Δy ₃₎ the material (10 of the cylindrical section 320) Is calculated as the camber amount (L).

In the embodiment of the present invention shown in FIGS. 1 and 2, the first, second and third cylinder portions 320-1, 320-2 and 320-3 are arranged at the same interval, and A (x ₁ , y ₁ , B (x ₂ , y ₂ ) and C (x ₃ , y ₃ ) are located at the rear end, the middle portion and the front end, respectively, along the longitudinal direction of the work 10.

The camber amount L of the material 10 calculated at this time becomes the camber amount L of the intermediate portion with respect to the line and the rear end of the material 10.

When the positions of the first, second and third cylinder portions 320-1, 320-2 and 320-3 are moved along the longitudinal direction of the material 10, the first, second and third cylinder portions 320-1 and 320- 2, and 320 - 3, the amount of camber of the workpiece 10 may be partially calculated.

In this case, the present invention includes a guide rail extending along the conveying direction of the material 10 and guiding the movement of the cylinder 320, a cylinder moving device 320 for moving the cylinder 320 along the guide rail to a set position, . ≪ / RTI >

The cylinder movement device may include a rack gear installed in the guide rail, and a pinion gear installed in the cylinder part 320 and rotated in conjunction with the motor in a state of engagement with the rack gear and moving the cylinder part 320.

In one embodiment of the present invention, the multi-point contact portion 310 is disposed opposite to both sides of the workpiece 10, and contacts the both sides of the workpiece 10 with the same contact pressure.

The point of contact 310 located at one side of the workpiece 10 is in contact with A (x ₁ , y ₁ ), B (x ₂ , y ₂ ) and C (x ₃ , y ₃ ) Multi-point is located to the other contact portion 310 is in contact with the _{a '(x 4, y 4} ), B' (x 5, y 5), C '(x 6, y 6).

When the multi-point contact portion 310 is provided so as to be opposed to one side and the other side of the workpiece 10 as described above, the camber amounts L and L 'on both side surfaces of the workpiece 10 are calculated by the above calculation .

The amount of camber L on one side of the blank 10 and the amount of the camber on the other side of the blank 10 can be calculated in a case where the camber amounts L and L ' (L + L ') / 2) obtained by averaging the camber amount L' of the material 10 can be calculated as the camber amount L _ave of the material 10.

The camber amount L _ave can also be applied to the amount of deflection in the widthwise middle portion of the blank 10.

For example, when the camber amount L on one side of the blank 10 is 5 and the camber amount L 'on the other side of the blank 10 is 3, the amount of camber in the widthwise middle portion of the blank 10 L _ave ) can be calculated as 4.

The workpiece shape measuring apparatus 300 according to the embodiment of the present invention having the above-described structure is configured to measure the amount of the camber of the workpiece from the displacement difference of each of the multi-point contact portions 310 contacting the side surface of the workpiece 10 at a plurality of points, That is, it is possible to calculate and monitor the side shape of the material in real time.

Accordingly, the present invention enables the operator to quickly check whether the camber of the workpiece 10 is generated or not and the amount of the camber in real time, thereby promptly eliminating the cause of camber occurrence, the efficiency of the process due to coping, the reliability of the product, .

Further, the present invention can prevent the deterioration of measurement reliability due to optical and thermal influences caused by steam or water around the material by directly contacting the side surface of the material (10) and measuring the shape of the material, Accuracy can be improved.

Further, the present invention can be easily positioned between the roller members of the transfer table 20, so that it can be easily combined with existing facilities.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: Material 20: Transfer table
300: work shape measuring apparatus 310: multi-point contact portion
311: rotation bar 312: contact roller
313: elastic spring 320: cylinder part
320-1: first cylinder part 320-2: second cylinder part
320-3: third cylinder part 321: cylinder
322: load 323: pressure sensor
330: shape measuring unit 331: displacement sensor
333: Operation unit 340: Material detection sensor

Claims (7)

A multi-point contact portion which is moved to the side of the material being conveyed and contacts the side surface of the material at three or more mutually spaced points;
A cylinder portion that moves the multi-point contact portion to the workpiece side and forms an operating pressure to contact the side surface of the workpiece; And
And a shape measuring unit for detecting a side displacement of the workpiece by detecting a linear displacement of an end of the multi-point contact unit moved in a width direction of the workpiece,
Wherein the multi-point contact portion includes: a rotation bar which is axially coupled to an end portion of the cylinder portion such that an intermediate portion thereof is rotatable; And
A contact roller which is provided at both ends of the pivot bar and contacts the side surface of the material and rotates in conjunction with the progress of the material;
And a measuring device for measuring the workpiece shape.
delete The method according to claim 1,
Wherein,
A cylinder arranged along a conveying direction of the work;
A rod coupled to the multi-point contact portion at an end thereof, moved to the outside of the cylinder by the hydraulic pressure in the cylinder and contacting the multi-point contact portion with the material; And
A pressure sensor for sensing a hydraulic pressure in the cylinder and detecting whether the multi-point contact portion is in contact with the workpiece;
And a measuring device for measuring the workpiece shape.
The method of claim 3,
The shape measuring unit may include:
A displacement sensor installed inside the cylinder for measuring a displacement of the rod; And
A calculating unit calculating a displacement difference of the rod detected by the displacement sensor and calculating a camber amount of the work side surface;
And a measuring device for measuring the workpiece shape.
5. The method of claim 4,
Wherein,
A first cylinder portion, a second cylinder portion, and a third cylinder portion that are sequentially disposed along the transport direction of the workpiece,
The operation unit,
A value obtained by averaging a displacement of the rod detected by the displacement sensor provided in the first cylinder part and a displacement of the rod detected by the displacement sensor provided in the third cylinder part, And calculates a difference in displacement of the rod detected by the sensor as the camber amount of the work.
The method according to claim 4 or 5,
The multi-
Wherein the workpiece is placed opposite to both sides of the workpiece and is contacted to both sides of the workpiece with the same contact pressure.
The method according to claim 6,
The operation unit,
Wherein a camber amount of the material calculated at the multipoint contact portion provided at one side of the material and a value obtained by averaging the camber amount calculated at the multipoint contact portion provided at the other side of the material are calculated as the camber amount of the material Material shape measuring device.

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