KR20230056224A - Appratus for inspecting surface of plating strip - Google Patents

Abstract

A surface inspection apparatus for steel plates is disclosed to quickly and precisely inspect the surface of a steel plate whose surface is treated by plating or the like. The surface inspection apparatus for steel plates according to the present embodiment includes a polishing unit provided with a grindstone for polishing the surface of a steel plate, a first moving unit for moving the polishing unit in a direction parallel to the longitudinal direction of the steel plate, and a second moving unit for moving the polishing unit and the first moving unit in a direction parallel to the width direction of the steel plate, wherein the polishing unit includes a grindstone bracket for holding the grindstone, a driving cylinder for advancing or retracting the grindstone and the grindstone bracket to the surface of the steel plate, and a link member interposed between the grindstone bracket and the driving cylinder and rotatably supporting the grindstone bracket.

Description

Steel plate surface inspection device {APPRATUS FOR INSPECTING SURFACE OF PLATING STRIP}

The present invention relates to a surface inspection apparatus for a steel sheet, and more particularly, to a surface inspection apparatus for a steel sheet capable of quickly and precisely inspecting the surface of a steel sheet subjected to a surface treatment such as plating.

In general, since the beauty of the surface and the quality of the surface after painting are very important for various steel sheets used in automobiles or home appliances, the work of inspecting the surface quality of the steel sheet is required.

In particular, large and small defects may occur on the surface of the steel sheet during the process of manufacturing, transporting, winding, or storing the steel sheet. Among the surface defects, the size that can be confirmed with the naked eye of the operator can be inspected manually by the operator or relatively smoothly by using an inspection device. However, since it is difficult to identify micro-defects on the surface of a steel sheet when small or fine-scale micro-defects exist in the steel sheet, especially after the steel sheet has been plated, a grindstone is used to inspect and detect micro-defects on the surface of the steel sheet. A method of polishing the surface is used.

Conventionally, in order to inspect minute defects present on the surface of a steel sheet, a process of manually grinding and inspecting the surface of a steel sheet while a worker holds a grindstone while a steel sheet production line or a transfer line is stopped has been utilized. However, since the polishing work is performed manually by the operator, it is very difficult to maintain a constant level of pressurization of the grindstone on the surface of the steel plate, and when there are multiple workers, the gripping force or pressing force of the grindstone is different for each individual, so the reliability of the defect inspection result There is a problem of this degradation.

In addition, since the worker has to apply force to the steel plate while holding the grindstone, not only the musculoskeletal system is strained, but also safety accidents such as injury to the body of the worker due to the sharp edge of the steel plate or the grindstone falling There is a problem that is high.

Therefore, there is a need for a method capable of promoting safety and work efficiency in a working environment while quickly and precisely inspecting or detecting defects present on the surface of a steel sheet.

Republic of Korea Patent Publication No. 10-2021-0082033 (2021. 07. 02. Publication)

The present embodiment is intended to provide a steel sheet surface inspection device capable of precisely detecting defects on the surface of the steel sheet.

The present embodiment is intended to provide a steel sheet surface inspection device capable of quickly and easily detecting defects on the surface of the steel sheet.

This embodiment is intended to provide a steel sheet surface inspection device capable of improving the quality and competitiveness of the steel sheet.

The present embodiment is intended to provide a surface inspection device for a steel plate capable of improving the safety of workers and working environments.

This embodiment is intended to provide a steel sheet surface inspection device that can promote efficiency in the steel sheet production process and quality control process.

According to one aspect of this embodiment, the polishing unit having a grindstone for polishing the surface of the steel plate; a first movement unit for moving the polishing unit in a direction parallel to the longitudinal direction of the steel plate; and a second moving unit for moving the polishing unit and the first moving unit in a direction parallel to the width direction of the steel plate, wherein the polishing unit includes a grindstone bracket holding the grindstone, and the grindstone and the grindstone bracket. It may be provided by including a drive cylinder that moves forward or backward toward the surface of the steel plate, and a link member interposed between the grindstone bracket and the drive cylinder and rotatably supporting the grindstone bracket.

The polishing unit further includes a grindstone frame having one side connected to the first moving unit and the other side supporting the drive cylinder, one end of the drive cylinder being connected to the rear surface of the grindstone bracket, and one part of the grindstone frame It can be supported on the grindstone frame.

The polishing unit may further include an elastic support for elastically supporting the grindstone and the grindstone bracket on the grindstone frame.

The elastic support may include at least one elastic member having one end supported on the rear surface of the grindstone bracket and the other end supported on the grindstone frame.

The elastic member is provided as a coil spring, and the elastic support is disposed inside the coil spring and extends in a direction parallel to the expansion and contraction direction of the drive cylinder. One end is connected to the rear side of the grindstone bracket, and the other end is It may be provided by further including a guide rod connected to the grindstone frame side.

The link member may be provided including a ball joint.

It may be provided by further including a housing frame that forms the body and is provided in a hexahedron shape with an empty inside so that the steel plate passes and is transported.

The first moving unit is provided between a first driving unit for receiving power and generating power, a first guide frame extending along the longitudinal direction of the steel plate, and between the polishing unit and the first guide frame. 1 may include a first gear unit for receiving power from a driving unit and moving the polishing unit along the first guide frame.

The second moving unit is provided between a second drive unit for receiving power and generating power, a second guide frame extending along the width direction of the steel plate, and between the first guide frame and the second guide frame, A second gear unit may be provided to receive power from the second driving unit and move the first guide frame along the second guide frame.

The second moving unit may further include a mounting bracket supporting the second guide frame to the housing frame.

It may be provided by further comprising a dust collection unit for collecting dust generated by the contact between the steel plate and the grindstone.

The dust collecting unit may include a dust collecting hood having an inlet open toward the grindstone, and the dust collecting hood may be supported at a lower end of the first guide frame.

The dust collecting unit has one side connected to the dust collecting hood and the other side connected to the suction device, and a pipe made of a flexible material, and a third guide frame extending along the arrangement direction of the pipe to guide movement and deformation of the pipe More may be provided.

The polishing unit and the first and second moving units may be provided as a pair to be mounted on one side and the other side of the housing frame, respectively.

The pair of polishing units and the first and second moving units may be disposed to face each other on one side and the other side of the steel plate.

A control unit controlling operations of the polishing unit, the first and second moving units, and the dust collecting unit may be further included.

The steel sheet surface inspection apparatus according to the present embodiment has an effect of precisely detecting defects existing on the steel sheet surface.

The steel sheet surface inspection apparatus according to the present embodiment has an effect of quickly and easily detecting defects existing on the surface of the steel sheet.

The steel sheet surface inspection apparatus according to the present embodiment has an effect of improving the quality and competitiveness of the steel sheet.

The steel sheet surface inspection apparatus according to the present embodiment has an effect of improving the safety of the operator and the working environment.

The steel sheet surface inspection apparatus according to the present embodiment has an effect of improving the efficiency of the steel sheet production process and quality control process.

1 is a perspective view showing a surface inspection apparatus for a steel sheet according to a first embodiment of the present invention.
2 is a front view showing a surface inspection apparatus for a steel sheet according to a first embodiment of the present invention.
FIG. 3 is a cross-sectional view in the AA′ direction of FIG. 2 .
4 is a BB′ direction cross-sectional view of FIG. 2 .
FIG. 5 is an enlarged view of part C of FIG. 4 .
6 is a front view showing a surface inspection apparatus for a steel sheet according to a second embodiment of the present invention.
7 is an enlarged perspective view of a dust collecting hood according to a second embodiment of the present invention.
8 is a DD′ direction cross-sectional view of FIG. 6 .

Hereinafter, this embodiment will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the spirit of the present invention to those skilled in the art to which the present invention belongs, and may be embodied in other forms without being limited to those presented here. In the drawings, in order to clarify the present invention, illustration of parts irrelevant to the description may be omitted, and the size of components may be slightly exaggerated to help understanding.

1 is a perspective view showing a surface inspection device 100 for a steel sheet according to a first embodiment of the present invention, and FIG. 2 is a front view showing the surface inspection device 100 for a steel sheet according to a first embodiment of the present invention. 3 and 4 are cross-sectional views in the direction A-A' and B-B' of FIG. 2, respectively.

1 to 4, the steel plate surface inspection apparatus 100 according to the first embodiment of the present invention includes a housing frame 110 forming a body and a grindstone G for polishing the surface of the steel plate S A polishing unit 120 having a, a first moving unit 130 for moving the polishing unit 120 in a direction parallel to the longitudinal direction of the steel plate S, the polishing unit 120 and the first moving unit 130 It may be provided including a second moving unit 140 for moving the steel plate S in a direction parallel to the width direction and a control unit (not shown) for controlling the operation of each unit.

The housing frame 110 forms the body of the device, and may be provided in a hexahedral shape with an empty interior so that the steel plate S can enter from the upper side and pass downward. The housing frame 110 can be equipped with and supported by various component elements such as the polishing unit 120, the first and second moving units 130 and 140 to be described later, and on the corner of the hexahedral shape to ensure sufficient rigidity. It can be manufactured with a plurality of frame members installed in. The housing frame 110 can be installed in various structures that can be supported on the steel plate (S) production facility. For example, if you want to check the micro-bonding present on the surface of the steel plate (S) after plating, the housing frame 110 ) may be installed at the rear end of the plating facility.

As shown in FIG. 4, the steel sheet surface inspection apparatus 100 according to the first embodiment of the present invention includes a housing frame ( 110) may be disposed on one side and the other side, respectively, and the pair of polishing units 120 and the pair of first and second moving units 130 and 140 are arranged and operated to face each other, so that the steel plate ( It is possible to simultaneously perform polishing and defect detection on one side and the other side of S). However, the present invention is not limited thereto, and the surface inspection apparatus 100 for a steel sheet according to the first embodiment of the present invention includes a polishing unit 120 described later according to the type of the target steel sheet S or the required degree of inspection work, and the first And the same can be understood even when the second moving units 130 and 140 are disposed in one set on either side of the housing frame 110 to perform the polishing operation and the defect detection operation on only one side of the steel plate S. .

The polishing unit 120 is provided to stably contact and polish the grindstone G on the surface of the steel plate S.

5 is an enlarged view of part C of FIG. 4. Referring to FIGS. 1 to 5, the polishing unit 120 is a grindstone (G) for polishing the steel plate (S) by contacting the surface of the steel plate (S). And, a grindstone bracket 121 for holding the grindstone G, a drive cylinder 122 for advancing or retracting the grindstone G and the grindstone bracket 121 toward the surface of the steel plate S, and the grindstone G Various parts of the polishing unit 120, including an elastic supporter 123 for elastically supporting the grindstone bracket 121, a link member 124 for flexibly supporting the grindstone bracket 121, and a drive cylinder 122 It may include a grindstone frame 125 for connecting and supporting the element to the first moving unit 130 to be described later.

The front side (upper side with reference to FIG. 5) of the grindstone (G) is disposed to face the surface of the steel plate (S), and the rear side (lower side with reference to FIG. 5) is gripped or supported by the grindstone bracket (121). can The grindstone (G) can be polished by contacting the surface of the steel plate (S) when the drive cylinder 122 is extended, which will be described later, and through this, micro-defects present on the surface of the steel plate (S) can be detected more quickly. .

Meanwhile, while the steel plate S is being transported, vibration or shaking may occur, and as a result, bending may occur in some parts of the steel plate S. Accordingly, the front surface (upper surface based on FIG. 5 ) of the grindstone (G) protrudes toward the steel plate (S) toward the center so that it can stably maintain contact with the surface of the steel plate (S) even if a bend occurs in the steel plate (S). can be formed Furthermore, a link that flexibly supports the grindstone bracket 121 on which the grindstone G is gripped so that contact between the grindstone G and the surface of the steel plate S can be stably achieved despite the vibration or shaking of the steel plate S. A member 124 may be provided. A detailed description of this will be described later.

The grindstone bracket 121 is provided in a plate shape, and the grindstone G is gripped and supported on the front surface (upper side with reference to FIG. 5), and the link member 124 can be connected to the rear surface (lower side with reference to FIG. 5). there is. In addition, the grindstone bracket 121 can advance or retreat the grindstone G toward the surface of the steel plate S by the extension operation of the drive cylinder 122 . To this end, the drive cylinder 122 has a front side end (upper end with reference to FIG. 5) connected to the rear surface of the grindstone bracket 121 via a link member 124, and a part of the other side of the grindstone frame ( 125) can be fixed and supported. An elastic support 123 to be described later is provided in the grindstone bracket 121 to support the grindstone G elastically. A detailed description of this will be given later.

The drive cylinder 122 has a front end (upper end in reference to FIG. 5) connected to the rear surface of the grindstone bracket 121 via a link member 124, and a part of the other side to the grindstone frame 125. Can be fixed and supported. The driving cylinder 122 may be provided as a hydraulic cylinder. As the working fluid flows into the hydraulic cylinder, the drive cylinder 122 extends and the grindstone bracket 121 moves forward so that the grindstone G can approach and come into close contact with the surface of the steel plate S, and on the contrary, it works from the hydraulic cylinder. As the fluid is discharged, the drive cylinder 122 is reduced and the grindstone bracket 121 retreats, so that the grindstone G can be separated from the surface of the steel plate S.

The driving cylinder 122 may be expanded and contracted based on an operator's input signal through a control panel (not shown), and in addition, extended and contracted operations may be operatively performed by a control unit (not shown). . In addition, the control unit detects the hydraulic pressure of the working fluid applied to the drive cylinder 122, and controls the operation of the drive cylinder 122 based on this, so that the adhesion between the grindstone (G) and the steel plate (S) surface or the grindstone (G) The pressing force of can be induced within a preset numerical range. Through this, the reliability and precision of the grinding stone G and the defect detection process can be improved.

The grindstone (G) can be supported elastically by the elastic supporter 123 that is caught on the grindstone bracket 121. The adhesion or pressing force of the grindstone G to the surface of the steel plate S can be primarily adjusted by controlling the operation of the drive cylinder 122, but as mentioned above, the steel plate S is transported in the process. Since vibration or shaking of (S) occurs, the adhesion or pressing force between the grindstone (G) and the steel plate (S) may deviate from a predetermined value. Accordingly, by performing the polishing operation in a state where the elastic support 123 elastically supports the grindstone G, the adhesion or pressing force between the grindstone G and the steel plate S can be secondarily finely adjusted.

To this end, a pair of grindstone brackets 121 may be arranged along the forward/backward direction, and at least one elastic support 123 may be interposed between the pair of grindstone brackets 121 and provided. Each elastic supporter 123 has both ends extending in parallel with the elastic member 123a supported by the pair of grindstone brackets 121 and the extension direction of the driving cylinder 122 or the forward and backward direction of the grindstone bracket 121. It may include a guide rod (123b) for guiding the compression and expansion deformation of the elastic member (123a). The elastic member 123a may be provided as a coil spring 123a, and the guide rod 123b may be disposed inside the coil spring 123a, but both ends may be connected between a pair of grindstone brackets 121. In addition, both ends of the guide rod 123b are the inner surfaces of the pair of grindstone brackets 121 so that the interval between the pair of grindstone brackets 121 can be smoothly changed according to the compression and expansion of the coil spring 123a. Each of the guide grooves 123c formed recessed into may be provided to be retractable.

As a result, even if the steel plate S is biased to one side or a large-scale bending occurs during the polishing operation, the elastic member 123a on one side is compressed while the elastic member 123a on the other side expands, so that the surface of the steel plate S It is possible to suppress and minimize the adhesion or pressing force of the grindstone (G) out of a predetermined range, and furthermore, the precision of grinding work and the reliability of defect detection can be improved.

On the other hand, in FIG. 5 and the above-described embodiment, the elastic member 123a is grafted and described when it is provided as a coil spring 123a, but it is not limited to that structure, and if the grindstone G can be elastically supported, the rubber member Of course, it can be provided with various structures and devices such as leaf springs.

The link member 124 is interposed between the grindstone bracket 121 and the drive cylinder 122 to maintain a more stable contact between the surface of the steel plate S and the grindstone G, and rotates the grindstone bracket 121. can support

Link member 124 may be provided as a ball joint (124). Specifically, the ball member 124a may protrude from the rear surface of the grindstone bracket 121 (based on FIG. 5), and the front end of the drive cylinder 122 (upper end based on FIG. 5). A casing 124b in which the ball member 124a is introduced and rotatably accommodated may be provided. In addition, although not shown in the drawing, the link member 124 is interposed between the ball member 124a and the casing 124b to reduce noise or wear due to contact between the outer surface of the ball member 124a and the inner surface of the casing 124b. A bushing or rubber bushing may be additionally included. As a result, the link member 124 rotatably supports the grindstone G and the grindstone bracket 121 holding it with respect to the drive cylinder 122, so that the grindstone G despite the vibration or shaking of the steel plate S It is possible to stably maintain contact between the surface of the steel plate S.

The first moving unit 130 is provided to move the polishing unit 120 in a direction parallel to the longitudinal direction of the steel plate S. By reciprocating the polishing unit 120 by the operation of the first moving unit 130, the grindstone G can perform polishing on the surface of the steel plate S along the longitudinal direction or the moving direction.

The first moving unit 130 includes a first driving unit 131 for generating power by receiving power, a first guide frame 132 extending along the longitudinal direction or moving direction of the steel plate S, and a polishing unit. A first gear unit 133 provided between the 120 and the first guide frame 132 and moving the polishing unit 120 along the first guide frame 132 using power provided from the first driving unit 131 ) may be included.

The first driving unit 131 may receive power from the outside through a power cable or receive power from a built-in power supply such as a battery to provide power for the movement of the polishing unit 120 . For example, the first driving unit 131 may be provided with an electric motor or the like to generate rotational force, but is not limited to the corresponding structure or device. The operation of the first drive unit 131 may be controlled based on an operator's input signal through a control panel (not shown), or may be operated and stopped operatively by a control unit (not shown).

The power provided from the first driving unit 131 may be transmitted to the first gear unit 133, and the first gear unit 133 uses the received power to follow the first guide frame 132 to the polishing unit ( 120) can be moved. The first guide frame 132 may be formed extending along the longitudinal direction or the traveling direction of the steel plate S to provide a moving path of the polishing unit 120, and the first guide frame 132 includes the steel plate S ) It may be provided with a guide groove (not shown) formed recessed along the longitudinal direction or a guide rail (not shown) formed protruding along the longitudinal direction of the steel plate (S). Gear teeth may be provided in the guide groove or the guide rail to generate linear movement of the polishing unit 120 through power output from the first gear unit 133 . In addition, one end of the first guide frame 132 is connected to the second gear unit 143 of the second moving unit 140 to be described later so that the first moving unit 130 moves along the width direction of the steel plate S. can A detailed description of this will be described later.

The first gear unit 133 may generate linear movement of the polishing unit 120 using power provided from the first driving unit 131, and may be fixed to each other so as to operate integrally with the polishing unit 120. can For example, the first driving unit 131 includes a motor, the first gear unit 133 may include a pinion gear coupled to the rotational axis of the motor, and the first guide frame 132 is engaged with the pinion gear. Since the rack gear is provided, the first gear unit 133 and the polishing unit 120 may move along the first guide frame 132 according to the operation of the first driving unit 131 . Alternatively, the first guide frame 132 and the first gear unit 133 are provided by including a linear motion guide, so that the polishing unit 120 uses power provided from the first driving unit 131. Of course, it is also possible to stably achieve linear movement.

The second moving unit 140 is provided to move the first moving unit 130 and the polishing unit 120 mounted thereto in a direction parallel to the width direction of the steel plate S. As the polishing unit 120 and the first moving unit 130 reciprocate by the operation of the second moving unit 140, the grindstone G performs the polishing operation along the width direction on the surface of the steel plate S. can

The second moving unit 140 includes a second driving unit 141 for generating power by receiving power, a second guide frame 142 extending along the width direction of the steel plate S, and a first guide frame ( 132) and the second guide frame 142, and the first guide frame to which the polishing unit 120 is connected and mounted along the second guide frame 142 using power provided from the second drive unit 141 ( 132 may include a second gear unit 143 that moves.

The second driving unit 141 receives power from the outside through a power cable or from a built-in power supply such as a battery, and receives power for moving the first guide frame 132 to which the polishing unit 120 is connected and mounted. can provide. For example, the second drive unit 141 may be provided with an electric motor or the like to generate rotational force, but is not limited to the corresponding structure or device. Like the first drive unit 131, the operation of the second driving unit 141 is controlled based on an operator's input signal through a control panel (not shown), or operated and operated by a control unit (not shown). A stop may be made.

Power provided from the second drive unit 141 may be transmitted to the second gear unit 143, and the second gear unit 143 uses the received power to follow the second guide frame 142 to the polishing unit ( 120) may move the connected and mounted first guide frame 132. The second guide frame 142 may extend along the width direction of the steel plate S to provide a moving path for the polishing unit 120, and the second guide frame 142 includes the width of the steel plate S. A guide groove (not shown) formed recessed along the direction or a guide rail (not shown) formed protruding along the width direction of the steel plate (S) may be provided. Gear teeth may be provided in the guide groove or the guide rail to generate linear movement of the first guide frame 132 in the width direction through power output from the second gear unit 143 . In addition, the second guide frame 142 may be fixedly installed on top of the housing frame 110 by a plurality of mounting brackets 144 .

The second gear unit 143 may generate linear movement in the width direction of the polishing unit 120 and the first guide frame 132 using power provided from the second driving unit 141, and the first guide frame ( 132) and can be fixed to each other so that they can operate integrally. For example, the second drive unit 141 includes a motor, the second gear unit 143 may include a pinion gear coupled to the rotational shaft of the motor, and the second guide frame 142 is engaged with the pinion gear. Since the rack gear is provided, the second gear unit 143 and the first guide frame 132 may move along the second guide frame 142 according to the operation of the second driving unit 141 . Alternatively, the second guide frame 142 and the second gear unit 143 are provided including a linear motion guide, so that the polishing unit 120 and Of course, the linear movement of the first guide frame 132 may be stably achieved.

Hereinafter, a surface inspection apparatus 200 for a steel sheet according to a second embodiment of the present invention will be described.

6 is a front view showing a surface inspection apparatus 200 for a steel sheet according to a second embodiment of the present invention, and FIG. 7 is an enlarged perspective view of a dust collecting hood 251 according to a second embodiment of the present invention. Also, FIG. 8 is a cross-sectional view in the direction DD' of FIG. 6 .

6 to 8, the steel plate surface inspection apparatus 200 according to the second embodiment of the present invention includes a housing frame 110 forming a body and a grindstone G for polishing the surface of the steel plate S A polishing unit 120 having a, a first moving unit 130 for moving the polishing unit 120 in a direction parallel to the longitudinal direction of the steel plate S, the polishing unit 120 and the first moving unit 130 A second moving unit 140 that moves in a direction parallel to the width direction of the steel plate S, a dust collection unit 250 that collects dust generated by the contact between the steel plate S and the grindstone G, and operation of each unit It may be provided including a control unit (not shown) for controlling.

The surface of the steel sheet according to the first embodiment of the present invention described above, except for cases in which separate reference numerals are additionally described in the description of the surface inspection device 200 of the steel sheet according to the second embodiment of the present invention described below. It is the same as the description of the inspection device 100, and the description is omitted to prevent duplication of contents.

The steel plate surface inspection apparatus 200 according to the second embodiment of the present invention includes a dust collection unit 250 that collects dust generated during polishing of the surface of the steel plate S by the polishing unit 120.

The dust collection unit 250 includes a dust collection hood 251 into which dust generated by the contact between the grindstone G and the surface of the steel plate S is introduced or collected, and a suction device (not shown) that introduces dust into the dust collection hood 251. ), a pipe 252 connecting the dust collecting hood 251 and the suction device, and a third guide frame 253 for guiding the movement and deformation of the pipe 252 according to the movement of the dust collecting hood 251, can be provided.

The dust collecting hood 251 is provided to introduce and collect dust generated when the grindstone G and the surface of the steel plate S come into contact. The dust collecting hood 251 is provided so that an inlet is opened toward the grindstone G, but may be formed such that a cross-sectional area is enlarged toward the inlet for more effective inflow of dust. In addition, since the dust collecting hood 251 is fixedly installed at the lower end of the first guide frame 132, the dust collecting hood 251 also moves when the polishing unit 120 and the first guide frame 132 move in the width direction of the steel plate S. can move together. As a result, since it is possible to perform not only the inflow and collection of dust by the suction device, but also the inflow and collection of dust by its own weight, it is possible to more stably collect dust and suppress scattering of dust into the work space.

The dust collecting hood 251 is connected to a suction device (not shown) by a pipe 252, and by the operation of the suction device, the dust generated by the grinding operation flows into the dust collecting hood 251 and is collected, thereby ensuring the safety of the work space. And comfort can be improved. The operation of the suction device may be controlled based on an operator's input signal through an operation panel (not shown), or operation may be operatively controlled by a control unit (not shown).

Considering that the dust collecting hood 251 moves along the polishing unit 120 and the first guide frame 132 in the width direction of the steel plate S, the pipe 252 can also be smoothly moved and deformed. It may be provided with a flexible material. In addition, a third guide frame 253 for guiding the movement and deformation of the pipe 252 is provided to prevent excessive deformation or load being applied to a portion of the pipe 252 when the pipe 252 is moved or deformed. can The third guide frame 253 may extend along the disposition direction of the pipe 252 at a position where the pipe 252 is placed. For example, as shown in FIGS. 6 and 8, considering that the dust collecting hood 251 reciprocates along the width direction of the steel plate S, the third guide frame 253 is the width of the steel plate S. Doedoe extended along the direction may be mounted on the lower side of the housing frame (110). However, the extension direction of the third guide frame 253 may be variously changed according to the direction in which the pipe 252 is placed, not limited to the corresponding formation direction.

100, 200: surface inspection device 110: housing frame
120: polishing unit 121: grinding stone bracket
122: drive cylinder 123: elastic support
124: link member 124a: ball member
124b: casing 130: first moving unit
131: first driving unit 132: first guide frame
133: first gear unit 140: second moving unit
141: second driving unit 142: second guide frame
132: second gear unit 250: dust collection unit
251: dust collection hood

Claims (16)

A polishing unit having a grindstone for polishing the surface of the steel plate;
a first movement unit for moving the polishing unit in a direction parallel to the longitudinal direction of the steel plate; and
A second moving unit for moving the polishing unit and the first moving unit in a direction parallel to the width direction of the steel sheet,
The polishing unit
A grindstone bracket for gripping the grindstone;
a driving cylinder for advancing or retracting the grindstone and the grindstone bracket toward the surface of the steel plate;
A surface inspection apparatus for a steel sheet comprising a link member interposed between the grindstone bracket and the drive cylinder and rotatably supporting the grindstone bracket. According to claim 1,
The polishing unit
Further comprising a grindstone frame having one side connected to the first moving unit and supporting the driving cylinder on the other side,
The driving cylinder is
A surface inspection device for a steel plate having one end connected to the rear surface of the grindstone bracket and one part supported by the grindstone frame. According to claim 2,
The polishing unit
The steel plate surface inspection apparatus further comprising an elastic support provided on the grindstone bracket and elastically supporting the grindstone. According to claim 3,
A pair of grindstone brackets are provided along the forward and backward direction,
The elastic support
A surface inspection apparatus for a steel plate including at least one elastic member having both ends interposed between the pair of grindstone brackets. According to claim 4,
The elastic member is provided as a coil spring,
The elastic support
The surface inspection apparatus of the steel sheet further comprising a guide rod disposed inside the coil spring and extending in a direction parallel to the extension direction of the drive cylinder. According to claim 1,
The link member is
Steel plate surface inspection device including a ball joint. According to claim 1,
A steel sheet surface inspection apparatus further comprising a housing frame formed in a body and provided in a hexahedron shape with an empty interior so that the steel sheet passes and is transported. According to claim 7,
The first mobile unit
A first driving unit for receiving power and generating power;
A first guide frame extending along the longitudinal direction of the steel plate;
A surface inspection apparatus for a steel plate including a first gear part provided between the polishing unit and the first guide frame, and receiving power from the first driving part to move the polishing unit along the first guide frame. According to claim 8,
The second mobile unit
A second driving unit for receiving power and generating power;
A second guide frame extending along the width direction of the steel plate;
Surface inspection of a steel plate including a second gear part provided between the first guide frame and the second guide frame and moving the first guide frame along the second guide frame by receiving power from the second driving part Device. According to claim 9,
The second mobile unit
The surface inspection apparatus of the steel plate further comprising a mounting bracket supporting the second guide frame to the housing frame. According to claim 7,
A surface inspection apparatus for a steel plate further comprising a dust collection unit for collecting dust generated by contact between the steel plate and the grindstone. According to claim 11,
The dust collection unit
Including a dust collection hood whose entrance is open toward the grindstone,
The dust collecting hood is a surface inspection device of a steel plate supported at the lower end of the first guide frame. According to claim 12,
The dust collection unit
A pipe having one side connected to the dust collection hood and the other side connected to the suction device and made of a flexible material;
A surface inspection apparatus for a steel plate further comprising a third guide frame extending along the direction of arrangement of the pipe and guiding movement and deformation of the pipe. According to claim 7,
The polishing unit and the first and second moving units
A surface inspection device for a steel plate provided in pairs to be mounted on one side and the other side of the housing frame, respectively. According to claim 14,
The pair of polishing units and the first and second moving units
A surface inspection device for a steel plate disposed opposite to each other on one side and the other side of the steel plate. According to claim 11,
The steel plate surface inspection apparatus further comprising a controller for controlling operations of the polishing unit, the first and second moving units, and the dust collecting unit.

Images