KR20110006874A - Apparatus for inspecting surfaces and method for inspecting surfaces using it - Google Patents

Abstract

PURPOSE: A surface inspecting apparatus and a surface inspecting method using the same are provided to reduce working time since a camera unit passes by multiple surface sections, thereby not changing the plane position of the slab. CONSTITUTION: A surface inspecting apparatus and a surface inspecting method using the same comprises a slab pedestal(100), a surface measuring unit(200), and a frame portion(300), and a control unit(400). A slab is placed on the slab pedestal. The surface measuring unit is operated in the upper area and side area of the slab and inspects the multiple surfaces of the slab. The frame portion supports the surface measuring unit. The control unit is installed in the frame portion and controls the drive of the surface measuring unit.

Description

Apparatus for inspecting surfaces and method for inspecting surfaces using it}

The present invention relates to a surface inspection apparatus and a surface inspection method using the same, and more particularly, a surface inspection apparatus and a surface inspection method using the same, which can continuously measure a plurality of surfaces of a cast steel manufactured by a continuous casting process in a position state. It is about.

In general, cast steel produced through a continuous casting process is a semi-finished state that is transferred to a subsequent process to be used to make a final product such as a thin plate or a hot steel sheet, depending on the size of the billet (bloom), bloom (bloom) Or slab or the like.

These slabs are subjected to surface measurements on a plurality of surfaces for the measurement and analysis of various surface defects. In this case, surface defects that can be confirmed by surface measurement include bubble marks, cracks, or oscillation marks.

Conventionally, in order to inspect the surface of the cast steel, the cast material, which is a heavy material, was transported and seated on a workbench using a crane and a magnetic chuck, and then the cast steel was operated by manipulating a crane and a magnetic chuck. The surface measurement was performed in units of one surface by tilting or rotating.

In order to measure the surface of the cast steel, the needle is scanned on the surface of the cast steel to be measured, and the movement of the needle is converted into an electrical signal and outputted, or the image of the surface of the cast steel is obtained by photographing means such as a camera. And an analysis method was used.

By the way, in the past, there was a difficulty in inspecting a plurality of surfaces of the cast. In other words, it takes a lot of work time to tilt and rotate the cast using a crane and magnetic chuck on the workbench to secure the measuring surface of the cast, and even after resetting the reference position for measurement after changing the surface position of the cast It takes a lot of work time, there was a problem that the work efficiency of the surface inspection process is lowered.

In addition, due to the immaturity of the skilled worker, the cast steel may fall from the crane and collide with the ground, and may be damaged, and there may be a problem that an industrial accident causes injury to the worker.

In addition, conventionally, since the stylus method and the image photographing method are made by hand, there is a problem in that an error occurs in the measurement result on the surface of the cast steel according to the skill of the operator, thereby failing to secure the reliability of the measurement data.

In order to solve the above problems, the present invention provides a surface inspection apparatus and a surface inspection method using the same that can continuously measure a plurality of surfaces of the slab manufactured through a continuous casting process in a set position.

The surface inspection apparatus according to the present invention comprises a slab seating table on which a cast steel is seated, surface measuring means for inspecting a plurality of surfaces of the cast steel by driving in an upper region and a side region of the cast steel, and separating the surface measuring means from the ground. It is provided with a supporting frame portion and the frame portion to control the driving of the surface measuring means, and integrated control means for managing and outputting the data measured by the surface measuring means.

In addition, the surface inspection method according to the present invention comprises the steps of seating the cast, setting the cast to a reference position when measuring the surface, continuously measuring a plurality of surfaces of the cast, the surface of the cast Integrating the data measured in the step, and outputting to the outside.

According to the present invention, since the image photographing means intersects a plurality of surface areas of the cast steel in a state where the cast steel is positioned on the substrate mounting table, that is, the position is fixed, work time is not changed because the surface position of the cast steel does not change. In addition, the setting of the reference position performed after the surface position of the cast steel is changed is not repeated, thereby reducing the work time.

In addition, since the image photographing means is linearly driven in the three-axis direction orthogonal to the upper and side regions of the cast steel and rotated in the horizontal and vertical directions to the ground, a plurality of surfaces of the cast steel can be measured continuously, Work efficiency is improved.

In addition, consistent cast surface measurement data can be obtained regardless of the skill of the operator, thereby improving the reliability of the measurement data.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention in more detail. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Like reference numerals in the drawings refer to like elements.

1 is a perspective view of a surface inspection apparatus according to an embodiment of the present invention, Figure 2 is a view showing a state seated on the surface inspection apparatus shown in Figure 1, Figure 3 is a cast steel seat according to the invention 4 is a cross-sectional view of the cast steel seating according to the line A-A 'shown in Figure 3, Figure 5 is a view showing a state in which the alignment bar is installed in the cast steel seating shown in FIG. In addition, Figure 6 is a perspective view of the surface measuring means according to the present invention, Figure 7 is an internal configuration of the main drive body shown in Figure 6, Figure 8 is an internal configuration of the vertical drive body shown in Figure 6, 9 is a side view of the surface inspection apparatus according to the present invention, Figure 10 is a graph showing the measurement results of the surface inspection apparatus according to the present invention.

1 to 10, the surface inspection apparatus 1000 according to an embodiment of the present invention (see FIGS. 1 and 2) includes a cast iron seat 100 on which a slab S is mounted, and a cast steel ( Surface measuring means 200 for driving the upper and side regions of S) to inspect a plurality of surfaces of the cast steel S, and frame portions 300 and frame portions for supporting the surface measuring means 200 spaced apart from the ground. It is installed on the 300 and controls the driving of the surface measuring means 200, and includes an integrated control means 400 for managing and outputting the data measured by the surface measuring means 200. Here, the slabs are divided into billets, blooms, slabs, and the like according to their sizes as described above. In the present invention, slabs are used as slabs. Of course, billet or bloom can be applied as cast.

As shown in Figure 3 and 4, the cast steel seat 100 is a work table for measuring the surface of the cast steel (S), the seat plate (S) is seated on the upper surface and the seating plate 110, the seating plate ( A plurality of height adjusters 120 and a plurality of height adjusters 120 for supporting the lower edge of the bottom surface of the bottom surface in a point contact manner and driving up and down are installed on the upper surface, and a plurality of movable wheels 150 on the lower surface. ) Is attached to the base plate 130.

The mounting plate 110 and the base plate 130 facing each other in the vertically spaced state have the same shape and size. In this embodiment, the mounting plate 110 and the base plate 130 have a rectangular shape having four corners. A plurality of height adjusters 120 are installed in the spaced space between them in total. Of course, as the shape of the seating plate 110 and the base plate 130 is changed to a circular, oval or polygonal, it is natural that the number of height adjusters 120 may also vary.

Since the slab S placed on the upper surface of the seating plate 110 is a heavy object, the seat plate S is crashed into the seating plate 110 by a collision during a seating process using a crane (not shown) or a magnetic chuck (not shown). Damage may occur, such as a recessed groove. In order to prevent this, in the present embodiment, unlike the seating plate 110 made of steel having excellent workability and low cost, the rigid protective plate 112 made of stainless steel is alloyed. It may be attached to the upper surface of the seating plate 110 to prevent damage.

The height adjuster 120 that can adjust the height of the corner portion at different heights by supporting the four corners of the height H ₃ , in particular the seating plate 110, spaced apart from the base plate 130, On the cylinder body 122 is installed on the upper surface of the base plate 130, the piston 126, the height (H ₁ ) protruding upward from the cylinder body 122 is variable, and one side of the cylinder body 122 The contactor is coupled to the control lever 124 and the upper end of the piston 126 connected to the upper and lower driving of the piston 126, the contact ball 127 is built in contact with the bottom surface of the seating plate 110 in a point contact manner ( 128).

In this embodiment, the height of the protrusion (H ₁ ) of the piston 126 is manually adjusted through the control lever 124, but is controlled by receiving the driving command of the integrated control means 400 on one side of the upper surface of the base plate 130 By providing a pneumatic or hydraulic type height adjuster driving means (not shown), it is possible to automatically control the driving of the height adjuster 120 to a preset value in the integrated control means 400.

In addition, the lower surface of the seating plate 110 may be configured to constrain the side of the contactor 128 having a curved upper portion and a lower shape to facilitate the connection between the seating plate 110 and the contactor 128. Fin 114 is formed.

In addition, an auxiliary plate 140 is provided between the seating plate 110 and the base plate 130, in which a plurality of partial cutout grooves 141 are formed to penetrate the piston 126. The auxiliary plate 140 is supported by a plurality of support bars 142 standing perpendicular to the upper surface of the base plate 130.

The plurality of movable wheels 150 coupled to the lower surface of the base plate 130 may include a folding wheel 154 rotating on the ground and a wheel holder for supporting the folding wheel 154 when the cast seat 100 moves. 152. When the cast iron seat 100 is fixed to the ground, the folding wheel 154 is folded upward, and the lower surface of the wheel holder 152 horizontal to the ground is in contact with the ground.

When the upper surface of the protective plate 112 or the protective plate 112 is not attached, the mounting reference line 119 is formed on the upper surface of the seating plate 110 as a reference for alignment in the process of placing the cast (S). . In the present exemplary embodiment, the mounting reference line 119 may have a lattice shape and may be aligned at the center of the upper surface of the protection plate 112 even when the size of the object to be measured is small.

As shown in FIG. 5 instead of the seating baseline 119, the upper surface of the protective plate 112 or the upper surface of the mounting plate 110 (when the protective plate 112 is not attached) along at least one side edge thereof. The bar (S) can be combined by protruding the alignment bar 180 is in close contact. Of course, the mounting reference line 119 and the alignment bar 180 may be provided at the same time.

In the present embodiment, the alignment bars 180 (180a, 180b) are formed at one edge (see 180a, FIG. 5 (a)) or both edges 180b (5b) perpendicularly intersect on a plane horizontal to the ground. Reference). Therefore, when the cast (S) is seated on the mounting plate 110 by horizontally moving so that the cast (S) in close contact with the inner surface of the alignment bar 180 made of "-" or "a" shape The position of S) can be set more clearly.

On the other hand, the slab (S) is eccentric in the seating plate 110 may be inclined on the horizontal plane seating plate 110 directly receiving the load of the slab (S). In order to detect the inclination of the seating plate 110, the inclination is detected on the top surface, one side, or both sides of the vertically intersecting seating plate 110, and the inclination of transmitting the tilt data sensed to the integrated control means 400. The sensor 190 is provided.

Tilt data measured by the tilt sensor 190 is transmitted to the integrated control means 400, the operator can easily check through the display device 410 provided on one side of the integrated control means 400. When the seating plate 110 is inclined, the operator readjusts the adjusting lever 124 to keep the seating plate 110 horizontal to the ground.

The frame part 300 has a frame part body 310 whose upper and side surfaces are open or partially open so that the surface measuring means 200 and the integrated control means 400 and the like can be easily installed. The frame body 310 is made of a combination of alumina (Al) or steel (bar) made of an alloy material (bar), etc., the lower portion of the frame body 310, the folding wheel 354 and the wheel A plurality of movable wheels 350 made of a fixing stand 352 are coupled. Therefore, it is possible to freely move and fix the position of the frame portion 300 in the factory.

On one side of the frame portion 300, specifically, in the direction in which the surface measuring means 200 is installed, the distance between the frame portion 300 and the cast iron seat 100 is adjusted (L ₁ ; see FIG. 9). In addition, the push unit 500 is provided to adjust the frame 300 and the opposing surface of the cast steel seat 100 to be parallel to the ground perpendicularly.

The push part 500 includes a push plate 510 and a push plate 510 which are in contact with one side surface of the cast seat 100, that is, the seat plate 110, the auxiliary plate 140, and the base plate 130. A pair of push adjustment levers connected to both sides of the push plate support 530 and the push plate support 530 supported by the frame part 300 to horizontally drive the drive plate to provide a driving force to the horizontal drive of the push plate 510. 540.

Setting the caster seat 100 on the alignment reference line 600 when the caster seat 100 and the frame part 300 are in close contact by adjusting the twist of the push plate 510 by a pair of push control levers 540. You can adjust the position.

In this embodiment, a pair of push control lever 540 is operated manually, but the push plate driving means (not shown) as the control lever 124 of the height adjuster 120 described above, the frame unit 300 It may be provided on one side of the automatic control by the integrated control means (400).

A pair of alignment reference lines 600 (refer to FIGS. 1 and 2) consisting of a pair of parallel straight lines serves as a reference line for setting a fixed position of the frame part 300 in the factory, and measures the surface of the cast steel S. In order to be a reference line for setting the alignment position of the cast steel seat 100 is located close to the frame portion 300. In the present embodiment, whether the frame portion 300 and the cast steel seating stand 100 are aligned visually is confirmed on the alignment reference line 600, but the frame portion 300 and the cast pieces facing each other on the pair of alignment reference lines 600. Alignment sensors (not shown) are installed at opposite positions of the seating table 100 to easily check whether the alignment reference line 600 is separated in the process of bringing the seating table 100 into the frame part 300. Can be.

As shown in FIG. 6, the surface measuring means 200 drives linearly in three axes (x-axis, y-axis, z-axis) orthogonal to the upper region and the side region of the slab S, and the image photographing means ( 260 is driven to rotate R _{1 in} a direction horizontal to the ground and to rotate R _{2 in} a direction perpendicular to the ground. As described above, the surface measuring means 200 can be linearly driven and rotated in multiple axes in the space in which the slab S is placed, so that a plurality of surfaces of the slab S can be freely measured.

The surface measuring means 200 is an image capturing means 260 for photographing the surface of the cast steel (S) to obtain an image, and the image capturing means 260 is orthogonal in the upper region and the side region of the cast steel (S) It includes a driving means for driving linearly in the three-axis direction, the rotation drive in the direction horizontal and vertical to the ground.

In the present embodiment, the measuring means driving unit is fixed to one side of the upper surface of the frame portion 300, the conveyance table 210 is formed in the guide guide groove 211 is formed on the upper surface in the longitudinal direction (x direction) extending and The main drive body 220 mounted on the carriage 210 and driven linearly along the guide guide groove 211 and connected to one side of the main drive body 220, and the extension direction of the carriage 210 on a horizontal plane. a horizontal driving body 230 which is linearly driven in a direction (y direction) intersecting with the (x direction), and a vertical driving rod which is vertically coupled to one end of the horizontal driving body 230 and is linearly driven toward the ground ( 250 includes a vertical driving body 240 is provided.

As shown in FIG. 7, the main driving body 220 is provided in the case 221 and the first rack gear 212 provided inside the case 221 and formed inside the guide guide groove 211. A second drive provided in an intersecting direction with an interlocking first pinion gear 216, a first drive motor 215 for driving the first pinion gear 216, and a first drive motor 215; The second pinion gear 236 is connected to the motor 235 and the rotation shaft of the second driving motor 235. Here, the second pinion gear 236 is engaged with a second rack gear (not shown) formed on one side of the horizontal drive body 230, the horizontal drive body 230 is rotated by the rotation of the second pinion gear 236. Driven straight. In the present embodiment, since the first driving motor 215 and the second driving motor 235 are used as the driving sources of the main driving body 220 and the horizontal driving body 230, the linear driving is performed by controlling the exact number of revolutions of the motor. The distance can be precisely controlled. A lower surface of the case 221 is formed with a groove 223 and a groove protrusion 224 fitted into the guide guide groove 211 formed in the feeder 210, and the horizontal driving body 230 can be easily connected. Provide 222.

In the present embodiment, the main driving body 220 and the horizontal driving body 230 are linearly driven in a rack-pinion method, but various methods such as a belt method or a pulley method may be applied. .

As shown in FIG. 8, the vertical driving body 240 drives the vertical driving rod 250 up and down in a cylindrical manner. To this end, the vertical driving body 240 includes a vertical case 241, a vertical cylinder 242 for pushing the vertical driving rod 250 up and down, and a first rotary gear 243 coupled to the outer circumferential surface of the vertical cylinder 242. And a second rotating gear 246 and a rotating motor 245 meshing with the first rotating gear 243 to rotate the upper and lower cylinders 242 (R ₁ ). That is, the vertical driving rod in the embodiment 250 is the horizontal rotation (R ₁₎ at the same time, the image pickup means 260 is vertically rotated (R ₂₎ on one side of the vertical driving rod 250 is in the vertical driving body 240, do.

The image capturing means 260 is a camera unit 262 for measuring the surface of the cast steel (S), and the image sensing means 260 detects the distance (L ₂ ) spaced apart from the surface of the cast (S) Sensor 264. The camera unit 262 captures the surface of the cast steel (S) to obtain image data, and transmits it to the integrated control means 400, the distance sensor 264 is the surface of the cast steel (S) before starting the shooting By measuring a reference point for measurement, a start point and an end point for photographing are set.

In the integrated control means 400, the image data of the surface of the slab S obtained by the camera unit 262 scanning across the plurality of surfaces (four sides and the upper side) of the slab S (Fig. 10 (a)). At this time, the image data is represented by a fine shape or an oscillation mark on the surface of the cast steel S according to the linear driving of the camera unit 262.

The above scanning process is repeated while varying the height of the cast steel S on one side of the cast steel S to obtain a plurality of image data.

The plurality of image data thus obtained are converted to the same scale by the integrated control means 400, that is, the correction of the distance difference between the camera portion 262 and the surface of the cast steel S is performed to obtain an image of one front side of the cast steel S. Are integrated. The image representing one front side of the cast (S) as described above is output to the outside in a graphical manner using a three-dimensional shape or color. Here, Figure 10 (b) is a graph showing one side of the front surface of the cast (S) in three dimensions, Figure 10 (c) is a graph showing the color using the height of the surface of the cast (S) on a horizontal plane.

The graphs as described above are output through the display device 410 provided on one side of the integrated control means 400, the operator can easily check and analyze through this.

Although not shown, a print means may be provided on one side of the integrated control means 400 to print a result of the surface of the cast steel S, that is, a graph using the three-dimensional shape and color.

Hereinafter, a surface inspection method for measuring surface defects on a plurality of surfaces of a cast using the aforementioned surface inspection apparatus will be described in more detail.

11 is a view showing a progress state of the surface inspection method according to an embodiment of the present invention, Figure 12 is a flow chart showing a surface inspection method according to the present invention.

11 and 12, the surface inspection method according to an embodiment of the present invention comprises the steps of seating the cast (S10), the step of setting the cast to a reference position when measuring the surface (S20), Continuously measuring the plurality of surfaces of the piece (S30) and the step of integrating the data measured on the surface of the cast and output to the outside (S40).

The cast steel is transferred to the upper portion of the cast steel seating station where the cast steel is seated through a transport means such as a crane or a magnetic chuck, and the cast steel is seated on the upper surface of the cast steel seat. (S10)

Subsequently, a reference position of the cast steel is set to measure the surface of the cast steel (S20). That is, the first positioning step of aligning and maintaining the cast steel at the cast steel seat, and horizontally moving the cast steel seat to one side of the frame part, , A second positioning step of adjusting one side of the caster seating surface and the opposite side of the frame portion to be in parallel with each other; and a third position for setting a reference point for measuring the surface of the cast steel by driving the image photographing means in the side region and the upper region of the cast steel. Setting step.

In the first positioning step, after aligning the cast pieces to the seating reference line or the alignment bar formed on the upper surface of the seating plate, the tilting of the seating plate is measured by a tilt sensor to correct the tilting of the seating plate through a plurality of height adjusters.

When the above process is completed, the cast seat is moved horizontally along the alignment reference line to close and close to one side of the frame portion. Thereafter, by adjusting the push part provided on one side of the frame part, the twisting of the cast iron seat rest is corrected so that one side of the cast iron seating stand facing the one side of the frame part is parallel (the direction crossing the pair of alignment reference lines).

Subsequently, the size of the slab is measured by scanning the image photographing means installed in the frame unit by linearly driving and rotating driving the plurality of side spaces and the upper side spaces of the cast steel. By measuring the size of the cast, it is possible to confirm the position of the cast on the caster seating stage, and further, to set a reference point for measuring the surface of the cast. The reference point herein includes a starting point at which the image capturing means starts shooting and an ending point at which shooting is stopped.

In addition, setting of a reference point is performed for every surface of the cast piece to measure.

When the above standard setting is completed, a plurality of surfaces of the cast steel are continuously measured. (S30) When surface measurement of one side of the cast steel is completed, another surface measurement is performed. The scanning process is repeated a number of times with a constant change in height in the cast steel. Image data (refer to FIG. 10 (a)) of the surface of the cast steel obtained through one scanning process may identify a recessed groove or an oscillation mark on a scan line. These image data are integrated into a plurality of surface images (refer to FIGS. 10 (b) and 10 (c)) of the cast steel. In the process of integration, correction is performed by the distance between the camera part and the surface of the cast steel. . The image data of the integrated slab surface can be displayed as a graph of three-dimensional shape or as a graph of color according to the height of the slab surface to easily identify various surface defects on the surface of the slab. Here, of course, it can be represented by a graph to which the three-dimensional shape and color are applied at the same time.

Graphs derived by measuring the surface of the cast is output through a display device provided on one side of the integrated control means, the operator can easily check and analyze through this. Although not shown, a printing means may be provided on one side of the integrated control means to print a result of the cast surface, that is, a graph using the three-dimensional shape and color.

As described above, through the surface inspection apparatus and the surface inspection method using the same according to the present invention, the image capturing means traverses the plurality of surface areas of the cast in a state in which the cast is positioned on the substrate mounting table, that is, in a fixed position. By doing so, the surface position of the cast steel is not changed, thereby reducing the work time. In addition, the setting of the reference position performed after the surface position of the cast steel is changed is not repeated, thereby reducing the work time. In addition, since the image photographing means is linearly driven in the three-axis direction orthogonal to the upper and side regions of the cast steel and rotated in the horizontal and vertical directions to the ground, a plurality of surfaces of the cast steel can be measured continuously, Work efficiency is improved.

In addition, consistent cast surface measurement data can be obtained regardless of the skill of the operator, thereby improving the reliability of the measurement data.

As mentioned above, although this invention was demonstrated with reference to the above-mentioned Example and an accompanying drawing, this invention is not limited to this, It is limited by the following claims. Therefore, it will be apparent to those skilled in the art that the present invention may be variously modified and modified without departing from the technical spirit of the following claims.

1 is a perspective view of a surface inspection apparatus according to an embodiment of the present invention.

2 is a view showing a state in which the cast steel seated on the surface inspection apparatus shown in FIG.

3 to 5 are a perspective view, a cross-sectional view and a modified view of the cast steel seat according to the invention.

6 to 8 are a perspective view and a detailed configuration of the surface measuring means according to the present invention.

9 is a side view of a surface inspection apparatus according to the present invention.

10 is a graph showing a measurement result of the surface inspection apparatus according to the present invention.

11 is a progress state diagram of the surface inspection method according to an embodiment of the present invention.

12 is a flowchart showing a surface inspection method according to the present invention.

<Description of Signs of Major Parts of Drawings>

1000: surface inspection device 100: cast seat

120: height adjuster 180: alignment bar

200: surface measuring means 220: main drive body

230: horizontal drive body 240: vertical drive body

250: vertical drive rod 260: video recording means

300: frame portion 400: integrated control means

500: push section

Claims (21)

A cast iron seating stand on which the cast steel is seated; Surface measuring means for driving in the upper region and the side region of the cast steel to inspect a plurality of surfaces of the cast steel; A frame part for supporting the surface measuring means spaced apart from the ground; And Integrated control means installed in the frame part to control driving of the surface measuring means, and to manage and output data measured by the surface measuring means; Surface inspection apparatus comprising a. The method of claim 1, The cast steel seat, A seating plate on which the slab is seated on an upper surface; A plurality of height adjusters for supporting the lower surface edge portion of the seating plate in a point contact manner and for driving up and down; And A base plate having a plurality of height adjusters installed on an upper surface thereof and a plurality of movable wheels attached to the lower surface thereof; Surface inspection apparatus comprising a. 3. The method of claim 2, The height adjuster, A cylinder body installed on an upper surface of the base plate; A piston which is inserted into the cylinder body and whose height protrudes upward; A control lever connected to one side of the cylinder body to drive the piston up and down; And A contactor coupled to an upper end of the piston and having a contact ball embedded in point contact with a lower surface of the seating plate; Surface inspection apparatus comprising a. The method of claim 3, wherein Surface contact apparatus is formed on the lower surface of the seating plate is formed with a contactor receiving pin for constraining the side of the contactor having an upper surface is curved and the lower shape is rounded. The method of claim 3, wherein Between the seating plate and the base plate is provided with an auxiliary plate formed with a plurality of partial incision grooves so that the piston penetrates, the auxiliary plate is a surface supported by a plurality of support bars erected vertically on the upper surface of the base plate Inspection device. The method according to any one of claims 2 to 5, Surface inspection apparatus is attached to the upper surface of the seating plate is a protective plate made of stainless steel alloy. The method of claim 6, Surface mounting apparatus is coupled to the upper surface of the protective plate is formed so that the mounting reference line of the cast or the alignment bar is in close contact with the cast along the at least one side edge. 3. The method of claim 2, The seating plate is provided with a tilt detection sensor for detecting the inclination of the seating plate, and transmits the tilt data sensed to the integrated control means. The method of claim 1, The surface measuring means, Image capturing means for photographing the surface of the cast piece to obtain an image; A measuring means driving unit which drives the image photographing means in a straight line in three axis directions orthogonal to the upper region and the side region of the cast steel, and rotates in a direction horizontal to and perpendicular to the ground; Surface inspection apparatus comprising a. The method of claim 9, The measuring means drive unit, A transfer table fixed to one side of an upper surface of the frame part and having a guide guide groove formed on an upper surface thereof in an extended length direction; A main drive body mounted on the transfer table and driving linearly along the guide guide groove; A horizontal driving body connected to one side of the main driving body and linearly driven in a direction crossing the extending direction of the conveyer on a horizontal plane; And A vertical driving body having a vertical driving rod coupled vertically to one end of the horizontal driving body and driven vertically upward and downward toward the ground, wherein the image photographing means is connected to a lower side of the horizontal driving body; Surface inspection apparatus comprising a. The method of claim 9, The video photographing means, A camera unit measuring the surface of the cast steel as an image; A distance sensor for sensing a distance from the camera unit to the surface of the cast steel; Surface inspection apparatus comprising a. The method of claim 9, The vertical driving rod is rotated in a direction horizontal to the ground in the vertical driving body, the image photographing means is rotated in a direction perpendicular to the ground on one side of the vertical driving rod. The method of claim 1, One side of the frame portion is a surface inspection device that is provided with a push portion for adjusting the distance between the frame portion and the cast steel seat, and the parallel side of the frame portion and the cast steel seat to be parallel. The method of claim 13, The push unit, A push plate in contact with one side of the cast seat; A push plate support for supporting and driving the push plate horizontally on one side of the frame part; And A pair of push control levers connected to both sides of the push plate support to provide a driving force to the horizontal driving of the push plate; Surface inspection apparatus comprising a. Seating the cast steel; Setting the slab to a position where the reference is used for surface measurement; Continuously measuring a plurality of surfaces of the slab; Integrating the data measured on the surface of the cast and output to the outside; Surface inspection method comprising a. The method of claim 15, Positioning the cast steel, A first positioning step of aligning and leveling the slab on a slab seat; A second positioning step of horizontally moving the cast iron seat to one side of the frame part and paralleling one side surface of the cast steel seat to the opposite side of the frame part; And A third positioning step of setting a reference point for measuring the surface of the cast by driving the image capturing means in the side region and the upper region of the cast steel; Surface inspection method comprising a. The method of claim 16, The first positioning step, Aligning the cast pieces according to the mounting reference line formed on the upper surface of the cast seat seating or in close contact with an alignment bar which protrudes; Adjusting the inclination so that the seating plate of the cast seat is parallel to the ground; Surface inspection method comprising a. The method of claim 16, The second positioning step, Horizontally moving the slab seating zone along an alignment reference line formed on the ground between the slab seating seat and the frame portion; Positioning the push unit so that the opposing side surfaces of the cast seat seat and the frame part are parallel on the alignment reference line while the cast seat rest and the frame part are in contact with each other; Surface inspection method comprising a. The method of claim 16, The third positioning step is Measuring a start point and an end point of the surface of the slab through a distance sensor of the imaging unit driven to cross one surface of the slab; Repeating the starting point and ending point measuring steps on the other side surface and the upper surface of the cast steel; Surface inspection method comprising a. The method of claim 15, Continuously measuring the plurality of surfaces of the cast steel, Acquiring image data by repeatedly performing a scan such that the image capturing means crosses the slab while varying the height of the slab on a plurality of side surfaces and an upper surface of the slab; Transmitting the image data to the integrated control means; Surface inspection method comprising a. The method of claim 20, Integrating the measured data on the surface of the cast, and outputting to the outside, Converting and consolidating the image data at the same scale; Outputting the integrated data to the outside in a graphical manner using a three-dimensional shape or color; Surface inspection method comprising a.

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