KR101359151B1 - Deflection of housing measurement device - Google Patents

Deflection of housing measurement device Download PDF

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Publication number
KR101359151B1
KR101359151B1 KR1020120029366A KR20120029366A KR101359151B1 KR 101359151 B1 KR101359151 B1 KR 101359151B1 KR 1020120029366 A KR1020120029366 A KR 1020120029366A KR 20120029366 A KR20120029366 A KR 20120029366A KR 101359151 B1 KR101359151 B1 KR 101359151B1
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KR
South Korea
Prior art keywords
housing
deformation
support
measuring unit
displacement measuring
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Application number
KR1020120029366A
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Korean (ko)
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KR20130107515A (en
Inventor
서재형
Original Assignee
주식회사 포스코
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Priority to KR1020120029366A priority Critical patent/KR101359151B1/en
Publication of KR20130107515A publication Critical patent/KR20130107515A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B38/00Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B2203/00Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/12Covers or shieldings
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means
    • G01B5/30Measuring arrangements characterised by the use of mechanical means for measuring the deformation in a solid, e.g. mechanical strain gauge

Abstract

Disclosed is a deformation measuring apparatus of a housing. Deformation measuring device of the housing according to an aspect of the present invention is a support structure provided to be supported in the height direction of the housing; At least one displacement measuring unit movably provided on the supporting structure to measure the deformation in the width direction of the housing, and thus the displacement measuring unit is integrally provided on the supporting structure to be easily installed in the housing. It is possible to accurately measure the displacement amount according to the height of the housing, thereby improving the measurement accuracy.

Description

Deflection Measurement Unit in Housing {DEFLECTION OF HOUSING MEASUREMENT DEVICE}

The present invention relates to a deformation measuring apparatus of a housing for measuring deformation occurring in a housing of a rolling mill used in a hot rolling process, and more particularly, due to self-gravity of a rolling mill, thermal deformation due to hot plate rolling, and repeated rolling loads. The present invention relates to a deformation measuring apparatus of a housing which measures deformation occurring in the rolling mill housing due to rolling mill deformation.

In general, the hot rolling process is a process of rolling a continuously supplied steel, for example, a rolled sheet.

The rolling mill 1 used in such a process includes a housing 10 forming an external appearance, and the upper and lower work rolls 22 provided to roll the upper and lower parts of the rolling plate S in the housing 10. , 24). The upper and lower work rolls 22 and 24 are connected to the housing 10 via the roll chocks 26.

On the other hand, the upper and lower work rolls 22 and 24 may be connected to the upper and lower reinforcement rolls 32 and 34 to assist the rolling operation of the rolling plate S, and the upper and lower reinforcement rolls 32 and 34 is linked to the housing 10 via a bearing block 36.

In addition, the conventional rolling mill 1 adjusts the positions of the upper and lower work rolls 22 and 24 and the upper and lower reinforcement rolls 32 and 34 according to the thickness of the rolling plate S on which the rolling is performed. Height adjustment structure is provided.

This rolling mill 1 is the whole structure including the housing 10 and the various rolls (22, 24, 32, 34) in the hot rolling process is in contact with the hot rolled plate (S) of about 1,000 ℃ or more, of various dimensions When rolling with the rolled plate (S) is subjected to an impact load. As such, the impact transmitted to the rolling mill 10 may be restored by elastic deformation in a short period, but may accumulate in a long period and cause plastic deformation. In addition, in addition to the rolling load generated when the rolling plate S is rolled, the rolling mill 1 also generates deformation due to its own weight.

Referring to FIG. 3, when the rolling plate S passes through the upper and lower work rolls 22 and 24 during hot rolling, the upper, lower, left, and right impacts are applied to the upper and lower surfaces of the rolling mill housing 10. And deformation, and the shock and deformation occur asymmetrically.

4 is a diagram showing the strain generated in the rolling mill by the rolling load acting on the rolling mill housing.

Referring to FIG. 4, when rolling loads are applied to the upper and lower parts of the rolling mill housing 10, the rolling mill housing 10 is extended upward and downward in the vertical direction, and the rolling mill housing 10 is inward in the horizontal direction. Contraction. At this time, in the deformation of the rolling mill housing 10, the amount of deformation in the horizontal direction relative to the amount of deformation in the vertical direction serves as a main internal deformation of the rolling mill housing 10.

Referring to FIGS. 5A and 5B, which are sectional views of a rolling mill housing according to the related art and a state in which deformation occurs, when the housing 10 of the rolling mill is deformed, upper and lower work rolls (22, 32) and the upper and lower reinforcement rolls (24, 34) is impossible to adjust the position, thereby lowering the upper and rear work rolls (22, 32) and upper and lower reinforcement rolls (24, 34) It becomes impossible to raise and it becomes impossible to roll the rolled plate S to desired thickness.

This is because when the internal deformation in the horizontal direction of the rolling mill housing 10 occurs, the rolling mill housing 10 is subjected to an external force that easily increases the deformation due to shock and vibration, etc. It is easy to cause deformation.

Accordingly, in the related art, as shown in FIG. 6A, horizontal gauge 50 is installed in the horizontal direction of the housing 10 in order to measure the degree of occurrence of internal deformation in the horizontal direction of the rolling mill housing 10. The deformation amount of the housing 10 is measured using the deformation amount detected by the horizontal gauge 50.

However, in the related art, the operator directly installs the horizontal gauge 50 in the housing 10. Accordingly, when the depth of the housing 10 is deep or when the inner diameter of the housing 10 is small or large, the horizontal gauge 50 is installed. ) Is not easy to install, and thus the deformation amount of the housing 10 cannot be accurately measured.

In addition, conventionally, when the size of the inner diameter of the housing 10 is small, as shown in (b) of FIG. 6, the horizontal gauge 50 is disposed in an asymmetrical, ie oblique direction, portion of the housing 10 so that the housing 10 is disposed. Although the deformation amount of is measured, the reliability of the measurement data is deteriorated due to the constraint that the deformation amount in the horizontal direction cannot be accurately reflected.

Therefore, by simply installing the horizontal gauge 50 inside the housing 10 and measuring the deformation amount as in the related art, the internal deformation of the housing 10 cannot be accurately measured, and furthermore, the verticality of the housing 10 can be measured. When the length or the length of the horizontal length there is a structural limitation that is difficult to measure the change in the inner diameter of the housing (10).

On the other hand, when the internal deformation of the rolling mill housing 10 occurs, adverse effects on the rolling quality, and it is difficult to maintain the stability of the entire rolling mill 1, which requires forced polishing and repair of the inside of the housing 10 As a result, the productivity is reduced and the life of the rolling mill 1 is reduced.

An embodiment of the present invention provides a deformation measuring apparatus of a housing that can stably measure the horizontal internal deformation of the rolling mill housing caused by various loads, impacts, vibrations, cumulative deformation, etc. during hot rolling, and respond quickly to deformation. It is.

Deformation measuring device of the housing according to an aspect of the present invention is a support structure provided to be supported in the height direction of the housing; At least one displacement measuring unit movably provided on the support structure to measure the deformation in the width direction of the housing, wherein the displacement measuring unit includes a support arm extending to an inner surface of the housing and the support arm; And a sensor unit for measuring a deformation amount of the inner side surface of the housing, and the displacement measuring unit includes a length variable portion that stretches the support arm so as to be spaced apart from the inner side surface of the housing during movement.

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In addition, the deformation measuring apparatus of the housing according to another aspect of the present invention includes a support structure provided to be supported in the height direction of the housing; And at least one displacement measuring unit movably provided on the support structure to measure the deformation in the width direction of the housing, wherein the displacement measuring unit includes a support arm extending to an inner surface of the housing and the support arm; A sensor unit for measuring the deformation amount of the inner surface of the housing via a medium, wherein the sensor unit measures the displacement using the contact or pressure change with the inner surface when the housing deformation.

In addition, the deformation measuring apparatus of the housing according to another aspect of the present invention includes a support structure provided to be supported in the height direction of the housing; And at least one displacement measuring unit movably provided on the support structure to measure the deformation in the width direction of the housing, wherein the support structure is continuous in the longitudinal direction and provided with a gear part. And a mobile unit including a gear wheel engaged with the gear unit and a motor for controlling the driving of the gear wheel.
In addition, the deformation measuring apparatus of the housing according to another aspect of the present invention includes a support structure provided to be supported in the height direction of the housing; And at least one displacement measuring unit movably provided on the support structure to measure the deformation in the width direction of the housing, wherein the support structure is elongated and stretched to maintain a close contact during deformation in the height direction of the housing. Contains wealth.
In addition, the deformation measuring apparatus of the housing according to another aspect of the present invention includes a support structure provided to be supported in the height direction of the housing; And at least one displacement measuring unit movably provided on the support structure to measure the deformation in the width direction of the housing, and including an auxiliary support provided on one side of the support structure to be supported in the width direction of the housing. Strain Measurement Device

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The auxiliary support part may include a width variable part that is stretched to maintain a close contact when the housing is deformed in the width direction.

In addition, the displacement measuring unit may include a support arm extending to the inner surface of the housing, and a sensor unit for measuring the amount of deformation of the inner surface of the housing via the support arm.

According to one embodiment of the present invention, the displacement measuring unit is integrally provided on the support structure so that it can be easily installed in the housing. In addition, the present embodiment, it is possible to adjust the height of the displacement measuring unit installed in the interior of the housing, thereby accurately measuring the amount of displacement according to the height of the housing can improve the measurement accuracy.

In addition, in this embodiment, since the displacement measuring unit is accurately positioned in the width direction by the supporting structure, the deformation in the width direction of the housing can be accurately measured, thereby improving reliability of the measurement data.

1 schematically shows a general rolling process.
Figure 2 is an exploded perspective view showing a rolling mill according to the prior art.
Figure 3 is a cross-sectional view showing the interior of the rolling mill according to the prior art.
4 is a view showing the amount of deformation occurring in the housing of the rolling mill according to the prior art.
Figure 5 (a) and (b) is a cross-sectional view of a case in which the rolling mill housing according to the prior art is in a normal state, and the deformation occurs.
Figure 6 (a) and (b) is a cross-sectional view of the horizontal gauge installed inside the rolling mill housing according to the prior art.
7 is a cross-sectional view of a state in which a housing deformation measuring apparatus is installed in a rolling mill according to an embodiment of the present invention.
8 is a front view showing a housing deformation measuring apparatus according to an embodiment of the present invention.
9 is a front view showing a part of a housing deformation measuring apparatus according to an embodiment of the present invention.
10 is a side view showing a part of a housing deformation measuring apparatus according to an embodiment of the present invention.
11 is a plan view showing a part of a housing deformation measuring apparatus according to an embodiment of the present invention.
12 is a cross-sectional view showing a support structure connection structure of the housing deformation measuring apparatus according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The shape and the size of the elements in the drawings may be exaggerated for clarity and the same elements are denoted by the same reference numerals in the drawings.

7 is a cross-sectional view of a housing deformation measuring apparatus installed in a rolling mill according to an embodiment of the present invention, Figure 8 is a front view showing a housing deformation measuring apparatus according to an embodiment of the present invention.

Referring to FIGS. 7 and 8, in the present embodiment, the deformation measuring apparatus 150 of the housing 110 may include a support structure 160 provided to be supported in the height direction in the interior of the housing 110.

For example, in the present embodiment, the rolling mill 100 includes a housing 110 forming an appearance, and the housing 110 has upper and lower work rolls 22 and 32 and upper and lower reinforcement in an up and down direction. It extends long so that the rolls 24 and 34 can be inserted, and can accommodate the upper and lower work rolls 22 and 34 or the upper and lower reinforcement rolls 24 and 34 in the width direction. Can be provided.

The rolling mill 100 is to move the rolling plate (S) in the horizontal direction, accordingly, the housing 110 is formed in a rectangular shape in which the upper and lower directions form a height, that is, the cross-sectional shape is long in the vertical direction. Can be.

A lower supporter for adjusting the position of the lower reinforcement roll 24 and the lower work roll 34 may be provided below the housing 110. In addition, an upper supporter for adjusting the position of the upper reinforcement roll 22 and the upper work roll 32 may be provided at the upper portion of the housing 110. To this end, a lower block in which the lower supporter is positioned may be provided in the lower portion of the housing 10, and a screw down hole 114 in which the upper supporter is inserted may be provided in the upper portion.

On the other hand, in the present embodiment, the housing 110 may be deformed in the process of rolling the rolled plate (S), since such deformation of the housing 110 affects not only the rolling quality but also the life of the rolling mill 100. It is necessary to measure the deformation amount of the rolling mill 100. At this time, the effect of the change in the width direction than the change in the longitudinal direction of the rolling mill housing 110 may have a significant effect on the life of the rolling mill 100 and the like.

Accordingly, the deformation measuring apparatus 150 of the housing 110 provided in the present embodiment may be provided to measure the deformation amount in the width direction of the rolling mill 100.

For example, in the present exemplary embodiment, the deformation measuring apparatus 150 of the housing 110 may include a support structure 160 provided to be supported in the height direction of the housing 110.

In addition, the support structure 160 may be provided to be movable at least one displacement measuring unit 170 for measuring the deformation in the width direction of the housing 110.

For example, in the present embodiment, the displacement measuring unit 170 may be provided at the upper and lower portions of the support structure 160, respectively.

The displacement measuring unit 170 may be adjusted to be installed in the support structure 160 according to the size or degree of deformation of the rolling mill housing 110, for this purpose of the housing 110 when the displacement measuring unit 170 is moved. It is preferred to be spaced apart from the inner side.

In the present exemplary embodiment, the displacement measuring unit 170 includes a support arm 172 provided to the support structure 160 and a sensor unit 180 measuring the amount of deformation of the inner surface of the housing 110 through the support arm 172. ) May be included.

In addition, in the present embodiment, the support arm 172 may include a flange 174 into which the support structure 160 is inserted, and the support arm 172 extends from the flange 174 to the inner side of the housing 110. Can be.

On the other hand, the displacement measuring unit 170 may be contracted when the widthwise deformation of the housing 110, and may include a length variable portion 176 that stretches the support arm 172 to correspond to such deformation.

For example, the variable length part 176 may include a cylinder 176a filled with a fluid or gas, and an operation rod 176b provided to be elastically provided in the cylinder 176a. The cylinder 176a may expand and contract the operation rod 176b according to the pressure of the fluid provided therein so that the support arm 172 may be spaced apart from the housing 110. After the movement of the displacement measuring unit 170 is completed, The operating rod 176b may be extended again to be in close contact with the inner surface of the housing 110.

In the present embodiment, the variable length portion 176 may be provided on one side of the support arm 172, and preferably, the variable length portion 176 is provided at the end of the support arm 172 so that the actuating rod 176b may be provided. It may be provided to be in direct contact with the inner surface of the housing 110.

In addition, the variable length portion 176 may include an elastic member, for example, a spring 176c provided between the operating rod 176b and the end of the cylinder 176a or the support arm 172. The spring 176c is positioned such that the end of the support arm 172 including the actuating rod 176b maintains the housing 110 in close contact with the inner surface of the displacement measuring unit 170 without moving. It can be provided to keep the fixed.

On the other hand, the sensor unit 180 may include a contact distance sensor 182 is provided at the end of the support arm 172 or the operating rod 176b to measure the displacement moving when the housing 110 is deformed.

The contact distance sensor 182 may be provided to measure the amount of deformation of the housing 110 via the sensing rod 184 associated with the end of the support arm 172 or the actuating rod 176b.

That is, when the end of the support arm 172 or the operating rod 176b is moved by the widthwise deformation of the housing 110, the sensing rod 184 associated with it is moved, the contact distance sensor 182 is The amount of deformation of the housing 110 may be measured by measuring the amount of movement of the sensing rod 184.

In addition, various methods may be applied to the sensor unit 180 in addition to the method of directly measuring the movement amount. For example, the sensor unit 180 may include a piezoelectric pressure sensor.

The piezoelectric pressure sensor presses the support arm 172 or the operating rod 176b as the inner surface of the housing 110 is deformed, and the pressure applied to the piezoelectric pressure sensor is proportional to the pressure by the piezoelectric element. Voltage is generated, and the pressure value can be measured by using the piezoelectric effect. In addition, by using the pressure value measured as described above, the movement displacement of the inner surface of the housing 110 may be detected.

In the present embodiment, the sensor unit 180 has been described to measure distance by direct contact, but the sensor unit 180 is not limited thereto and may be applied in various ways.

On the other hand, in this embodiment the displacement measuring unit 170 may be provided to be movable relative to the support structure 160, thereby adjusting the height of the displacement measuring unit 170 and the displacement of the housing 110 at various heights Can be measured.

To this end, the displacement measuring unit 170 may include a moving wheel 178 in close contact with the support structure 160, and the moving wheel 178 may be associated with a motor 179 for driving. For example, the motor 179 may be provided to the server motor to control the movement amount, and the support structure 160 may be rotated as the movement 횔 178 rotates in close contact with the support structure 160 when the motor 179 rotates. You can move along.

Here, the movement wheel 178 may be provided on the flange 174 provided to the outside of the support structure 160, for this purpose, the flange 174 is provided with a bracket 178a for supporting the movement wheel 178 Can be.

On the other hand, in the present embodiment, the displacement measuring unit 170 may slip with the support structure 160 when the moving wheel 178 rotates, and change the moving structure of the displacement measuring unit 170 to prevent such slip. It is also possible.

Preferably, the support structure 160 may be provided with the gear portion 162 continuously in the longitudinal direction. In addition, the displacement measuring unit 170 may be provided with a gear 178b engaged with the gear unit 162 of the support structure 160 on the outer circumferential surface of the moving wheel 178. That is, in this embodiment, the displacement measuring unit 170 may include a gear wheel as a configuration to replace the moving wheel 178. Accordingly, the displacement measuring unit 170 may move along the support structure 162 without slip as the gear wheel is engaged along the gear part 162 of the support structure 160 when the motor 179 is driven.

On the other hand, in the present embodiment, the displacement measuring device 150 of the housing 110 may be fixed and maintained in close contact with the upper and lower portions of the support structure 160 on the upper and lower ends of the housing 110. However, the deformation of the housing 110 may also occur in the height direction during deformation. For example, the housing 110 may be deformed to be contracted in the width direction by the rolling load, and may be deformed to expand in the height direction.

As such, the support structure 160 may further include a length-variable part in which the expansion and contraction is made in the longitudinal direction to maintain the close contact state when the housing 110 is deformed in the height direction.

To this end, the support structure 160 is provided in a double tubular structure overlapping each other, overlapping by sliding movement can be made height adjustment. That is, the support structure may include a first support tube 160a and a second support tube 160b inserted to partially overlap the first support tube 160a.

In addition, an elastic member may be provided between the first support tube 160a and the second support tube 160b, and thus the first support tube 160a may be caused by the elasticity of the elastic member when the housing 110 is expanded in the height direction. ) And the second support tube 160b may be extended and maintained in close contact.

Here, the first support tube 160a may be provided with a diameter into which the second support tube 160b may be inserted, and an elastic member for elastically supporting a lower portion of the second support tube 160b therein, for example, a spring ( 164 may be provided. In addition, one side of the first support tube 160a may be provided with at least one protrusion 160c in which a portion of the first support tube 160a is recessed inward to support the spring 164.

In addition, in the present embodiment, the deformation measuring apparatus 150 of the housing may further include an auxiliary support 190 provided to be supported in the width direction of the housing on one side of the support structure.

For example, in the present embodiment, the auxiliary support 190 may be provided at the central portion of the support structure 160.

In the present embodiment, the rolling mill housing 110 may have a minimum deformation in the center portion, and a protrusion structure 112 protruding from the center portion may be provided.

The auxiliary support 190 may be in close contact with the protruding structure 112 of the rolling mill housing 110 and may support the support structure 160.

In addition, the auxiliary support 190 may further include a width-variable portion that is stretched to maintain a close state during deformation in the width direction of the housing 110. In this embodiment, the width variable portion may have a structure similar to the length variable portion 176 provided to the displacement measuring unit 170. That is, in the present embodiment, the width variable portion may include a cylinder filled with a fluid or gas, and an operation rod elastically provided in the cylinder. The width variable portion may be contracted when the protrusion structure 116 is contracted by the widthwise deformation of the housing, and may be maintained in close contact with the inner surface of the housing 110.

It will be understood by those skilled 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 and their equivalents. It will be clear to those who have knowledge.

100: rolling mill 110: housing
112: protrusion structure 114: screw down hole
150: strain measuring device 160: support structure
160a: first support tube 160b: second support tube
160c: protrusion 162: gear portion
164: spring 170: displacement measuring unit
172: support arm 174: flange
176: length variable 176a: cylinder
176b: working rod 176c: spring
178: travel wheel 178a: bracket
179: motor 180: sensor unit
182: contact distance sensor 184: sensing rod
190: auxiliary support

Claims (8)

  1. A support structure provided to be supported in a height direction of the housing; And at least one displacement measuring unit movably provided on the support structure to measure the deformation in the width direction of the housing.
    The displacement measuring unit includes a support arm extending to the inner surface of the housing, and a sensor unit for measuring the amount of deformation of the inner surface of the housing via the support arm,
    The displacement measuring unit includes a deformation measuring device of the housing including a length variable for stretching the support arm so as to be spaced apart from the inner surface of the housing when moving.
  2. A support structure provided to be supported in a height direction of the housing; And at least one displacement measuring unit movably provided on the support structure to measure the deformation in the width direction of the housing.
    The displacement measuring unit includes a support arm extending to the inner surface of the housing, and a sensor unit for measuring the amount of deformation of the inner surface of the housing via the support arm,
    The sensor unit strain measurement device of the housing to measure the displacement using the change in pressure or contact with the inner surface when the housing deformation.
  3. A support structure provided to be supported in a height direction of the housing; And at least one displacement measuring unit movably provided on the support structure to measure the deformation in the width direction of the housing.
    The support structure is continuous in the longitudinal direction provided with a gear portion,
    The displacement measuring unit is a deformation measurement apparatus of a housing comprising a mobile unit including a gear wheel meshed with the gear unit and a motor for controlling the driving of the gear wheel.
  4. A support structure provided to be supported in a height direction of the housing; And at least one displacement measuring unit movably provided on the support structure to measure the deformation in the width direction of the housing.
    The support structure is a deformation measuring device of the housing including a length-variable portion that is stretched to maintain a close state during deformation in the height direction of the housing.
  5. A support structure provided to be supported in a height direction of the housing; And at least one displacement measuring unit movably provided on the support structure to measure the deformation in the width direction of the housing.
    And an auxiliary support provided on one side of the support structure in a width direction of the housing.
  6. The method according to claim 5,
    The auxiliary support part further comprises a width variable portion that is stretched to maintain a close state during deformation in the width direction of the housing.
  7. The method according to any one of claims 3 to 6,
    The displacement measuring unit includes a support arm extending to an inner surface of the housing, and a sensor unit for measuring the deformation amount of the inner surface of the housing via the support arm.
  8. delete
KR1020120029366A 2012-03-22 2012-03-22 Deflection of housing measurement device KR101359151B1 (en)

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KR101359151B1 true KR101359151B1 (en) 2014-02-06

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Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
KR102098466B1 (en) * 2018-04-23 2020-04-07 주식회사 포스코 Compensating method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0116085Y1 (en) * 1994-12-29 1998-04-17 김만제 Measuring apparatus for deformation electric furnace in steel factory
KR20020051473A (en) * 2000-12-22 2002-06-29 신현준 Roll chock shift measuring device
JP2003148902A (en) 2001-11-09 2003-05-21 Nsk Ltd Measuring device for bearing housing
KR100530468B1 (en) 2001-12-22 2005-11-23 재단법인 포항산업과학연구원 Diagnosis method of mill modulus hysteresis

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0116085Y1 (en) * 1994-12-29 1998-04-17 김만제 Measuring apparatus for deformation electric furnace in steel factory
KR20020051473A (en) * 2000-12-22 2002-06-29 신현준 Roll chock shift measuring device
JP2003148902A (en) 2001-11-09 2003-05-21 Nsk Ltd Measuring device for bearing housing
KR100530468B1 (en) 2001-12-22 2005-11-23 재단법인 포항산업과학연구원 Diagnosis method of mill modulus hysteresis

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