KR20030041558A - Apparatus and method for controlling the apparatus for preparing welding in high speed metal strip annealing process - Google Patents

Abstract

PURPOSE: An apparatus for improving weldability by effectively removing foreign materials adhered to a steel sheet before performing welding between steel sheet strips and processing folded welding part, and a method for controlling the apparatus are provided. CONSTITUTION: The welding preparation apparatus used in high speed annealing process and method for controlling the apparatus comprises cleaning agent spraying units(113,114) comprising pipe part and spray nozzle part; a rotational processing unit comprising a wire brush(212) installed and supported to operating cylinder, left and right base guides, left and right base beams and brush fixing base, a grinding stone arranged at the side of the wire brush(212), and an air rotation motor for operating the wire brush(212) and grinding stone; moisture removal units(131,132) for supplying heated air to the steel sheet through pipe part and spray nozzle part; and a control unit(411). The method for controlling the welding preparation apparatus used in high speed annealing process comprises the steps of receiving thickness information of current steel sheet from controller; moving the apparatus to a determined position to set the apparatus by signals from the controller; rotating wire brushes by air rotation motor; moving upper and lower wire brushes to determined position; starting moving of a carriage for supporting the wire brushes; moving the carriage along the end part of the steel sheet; determining whether or not to operate cleaning agent spraying units installed in front of the wire brushes; operating moisture removal units installed in rear of the wire brushes; and restoring the carriage to the original position by stopping operation of the moisture removal units and wire brushes.

Description

Welding preparation device and control method used in high speed annealing process {APPARATUS AND METHOD FOR CONTROLLING THE APPARATUS FOR PREPARING WELDING IN HIGH SPEED METAL STRIP ANNEALING PROCESS}

The present invention relates to a facility for releasing a round coil-shaped iron plate to welding in a process of continuously supplying a thin strip, and in particular, joining the iron plate with a mesh seam welding facility. The present invention relates to an apparatus and a control method for improving weldability by removing foreign substances attached to an iron plate and processing overlapping welded portions.

The thick iron plate of 2 [mm] or more is processed into the thin sheet of 0.4-2.0 [mm] in a cold rolling process. The thin steel sheet is sent to the heat treatment process, skin pass mill process, plating process, or cutting process to give the desired materials and properties. In order to be able to work, the strip must be fed continuously and continuously at the input side of the process. In other words, the cold rolling process is a process in which the following coil is welded to the rear end of the preceding coil immediately after the operation of one coil is completed. This is to provide a characteristic that the heat treatment at a high temperature of 900 ℃ or more and to uniformly plate the surface.

In particular, at the inlet of the process, a strip welding operation is performed immediately after the completion of one coil strip for continuous strip feeding to the next coil strip. In other words, the strips are overlapped with a width of 1 to 2 [mm], and a high current is passed through the electrode wheels, and the steel plates are melted and pressed under high pressure while being joined. For this purpose, the cold rolling mill typically uses a mash seam welder.

Welding conditions can be said to be as close as possible to the strength of the disc so that no abnormal situation in which the parts welded to the strips are torn or broken while passing through a long process does not occur. In order to satisfy these conditions, there are criteria such as the strength of the current applied to the electrode, the amount of reduction, and the welding speed, depending on the condition of the steel plate to be welded.

The basic condition of welding of steel plate is thickness and material, and accordingly, the setting values of several stages are made into a table, so when strips are put into the process, the setting values suitable for the conditions are applied to the welder to obtain optimal values. Welding is performed, but weldability is deteriorated due to a situation other than these basic conditions, and a trouble may occur in the process.

The material to be welded may have a number of factors that cannot be quantitatively measured in addition to the material and thickness. That is, when oil is excessively attached to the surface of the iron plate, if it is deposited for a long time after production and an oxide scale is generated on the surface of the plate, after the heat treatment process once, there is no oil on the surface of the plate and ductility If given, etc. is not a basic condition to apply the welding table, it is necessary to separate work to remove it when the input of such a coil.

When welding without removing this state, foreign substances generated on the surface of the plate act as a resistor, so that the current output through the electrode is significantly reduced when applied to the surface of the plate. In addition, since these materials are present on the surface of the iron plate, when the two plates overlap, they are present between the plate to be melted and act as a separation layer that prevents the bonding between the two plates. After all, even if the current strength and pressure are increased, the bonding strength of the two plates is significantly reduced, so the foreign matters attached to or generated on the surface must be completely removed.

In order to remove foreign matters generated on the surface of the plate in various forms, two methods of grinding the plate surface or grinding using hydrochloric acid (Hcl) are commonly used.

Grinding performed by an operator using a power tool is not only able to smoothly and uniformly smooth the surface of the plate, but also excessively cut only a specific part, and it is difficult to work properly according to the degree of contamination of the plate surface due to the characteristics of the tool. In addition, this cut part is uneven overall, causing the secondary trouble, such as the crushed powder is blown into the equipment to be stamped or buried.

Another method is to wipe the surface of the plate to be welded with a cloth soaked with hydrochloric acid. This can solve some of the problems caused by the grinder work, but it is also very unsafe because the worker must handle the toxic substances by hand. If hydrochloric acid comes into contact with the operator's body, he must be very careful with the risk of burns and gas poisoning, and even with the proper tools and protective equipment, the worker's safety cannot be guaranteed and the work efficiency cannot be expected.

In particular, one of the major problems when the surface of the plate is wiped with hydrochloric acid is that hydrochloric acid remains on the surface of the plate, causing the film to be formed again after only a few minutes. Immediately after hydrochloric acid, a small amount of hydrochloric acid remaining on the surface of the plate (a small amount of hydrochloric acid buried in the plate in the form of water) passes through the electrode and is not a big obstacle when welding. That is, since the same phenomenon as the shape of the oil on the normal plate does not reduce the strength of the welding. However, when some time (about 5 to 10 minutes) elapses after hydrochloric acid is exposed to the air, the hydrochloric acid reacts with iron to form a red oxide film.

To prevent and delay even a slight phenomenon, wipe the plate with a cloth soaked with hydrochloric acid, and then wipe the plate again with a new cloth to remove hydrochloric acid as much as possible.

Another problem with using hydrochloric acid is that it is effective in removing foreign matters or discoloration areas attached to the surface of the plate. However, complete removal of temporal color or excessive oxidative discoloration infiltrated into the surface of the iron plate is effective. It is difficult.

In addition, since all these operations are performed by hand, an assistant worker is required. Therefore, the cleaning work must be promptly performed on the front and rear sides of the coil before and after, so that they may not be thoroughly removed depending on the skill and fatigue of the operator. Failure often occurs.

In the prior art, there is a method of removing the film by rotating the brush roll by installing a brush roll on the top and bottom of the plate, but in order to weld the plates, the end of the overlapping part must be wiped off. The roll-shaped brush over the entire area inevitably generates partial wear in the process of performing various widths, and when the partial wear occurs, a specific portion of the plate is not wiped. In this case, since the upper brush roll and the lower brush roll work in a state opposite to each other, there may occur a phenomenon in which the upper and lower brushes contact each other and wear each other in a region without a plate.

Another conventional technique has a method of wiping while rotating by adding hydrochloric acid to the brush roll, but also there is no means for precisely adjusting the end of the plate. In other words, the overlapping part of the plate must be wiped up and down, and this method also works in the width direction of the plate, so problems such as incomplete work and partial wear of the roll still occur.

When welding two plates together butt overlap, the overlap is increased in thickness. The increase in thickness of the welded portion is closely related to the weldability, and also needs to maintain an appropriate thickness because it passes many rolls in a high-speed heat treatment process and receives a large pressing force in a skin pass mill operation.

As shown in FIG. 7, after completion of welding of the two iron plates S1 and S2, angled portions S1 ′ and S2 ′ are generated at respective ends. The high-speed annealing process must go through a lot of high temperature rolls, so that the angular parts S1 'and S2' continuously touch the surface of the rolls as they pass through each roll, causing impact on the surface of the rolls. . Such scratches are referred to as step marks, which cause not only surface damage of the roll but also scratches on the surface of the iron plate passing through the roll. The angular portions of these welds become larger as the thickness of the steel sheet becomes thicker.

In order to minimize such a step mark, the limit is set so that the thickness of a certain portion does not deviate from a certain range according to the thickness of the steel plate, but this is inevitably a defect. The present invention proposes a method of machining a weld of an iron plate that provides a fundamental cause of such a step.

The present invention constitutes a welding preparation device and a control sequence thereof, which can effectively solve the above-mentioned conventional problems, and effectively remove various foreign matters (special temper color: oxide film) in the best way according to the state of the surface of the steel plate. It is intended to provide the best welding conditions and to improve the cause of the step difference.

1 is a side view of a welding preparation device according to the present invention;

Figure 2a is a perspective view of the lower rotary processing unit, Figure 2b is a detailed view of the main portion, Figure 2c is an exploded perspective view,

Figure 3 is a perspective view of the position adjusting device of the upper rotary processing device,

4 is a perspective view of a carriage moving device;

5 is a schematic view of the installation operation of the present invention;

6a is a raw material input flow chart;

Figure 6b, c is an operation flowchart of the present invention,

Figure 7 is an enlarged cross-sectional view of the strip weld.

Explanation of symbols on the main parts of the drawings

110: upper frame 111: lower frame

113: detergent injection device 121: carriage body

125: carriage base 131: moisture removal device

151: cleaning pipe 152: power cable

153: supply track 161: supply tank

162: supply pump 164: carriage moving device

165: installation base beam 166: moving rail

168: guide bar 169: steam piping

180: screw bar 181: screw delivery beam

211: air rotating motor 212: wire brush

213: grinding stone 260: working cylinder

261: base guide 263: base beam

265: brush fixing base 311: servo motor

401: input part of the process 402: iron plate

403: mail gate 411: control device

412: limit sensor

Hereinafter, the present invention for achieving the above object will be described in more detail with reference to the accompanying drawings.

1 shows the overall configuration of a welding preparation device according to the present invention. This welding preparation device largely comprises a carriage part, a carriage moving device, a rotary processing device, a cleaning agent spray device, a water removing device, a position adjusting device, and other accessories.

The carriage part is connected to the upper frame 110 and the lower frame 111 to the body 121, and upper and lower cleaner spraying devices 113 and 114, upper and lower rotary processing devices (Fig. 2) and moisture removing devices 131 and 132 in each frame. ) Is combined. The apparatus is also provided with various air, detergent pipes 151 and power cables 152 supplied thereto. These various pipe 151 and the cable 152 is a flexible supply track 153 is installed on the rear of the device for smooth operation when the carriage portion moves. The supply track 153 is connected to the upper portion of the control device (upper calculator) 411, and all the pipes and cables are connected to the inside of the control device 411. The rear side of the carriage body 121 is provided with a square detergent supply tank 161 for storing and supplying the detergent. Here, the upper and lower cleaner spraying devices 113 and 114 are connected by pipes.

A supply pump 162 is installed below the detergent supply tank 161, which is also attached to the carriage body 121. The lower frame 111 and the body 121 are installed above the carriage base 125, and the rails 166 and 167 (see FIG. 4) and the facility base beam 165 are installed below.

The carriage moving device 164 is provided in the carriage base 125 and the installation base beam 165. The carriage moves forward and backward along two rails 166 and 167 mounted on the installation base beam 165. The carriage base 125 has a guide bar 168 attached to the side to move the rails 166 and 167. The carriage base 125 has a " c " shape so as to prevent separation and smooth operation when moving along the rails 166 and 167. The groove is dug up. The side of the carriage base 125 is provided with a screw bar 180 having a spiral gear, and the screw bar 180 is rotated by the power transmitted during the operation of the servo motor 311 so that the screw transfer beam 181 is provided. As it passes through (see Figure 4), the carriage is moved. The screw delivery beam 181 is fixed to the facility base beam 165. The servo motor 311 and the screw bar 180 are connected by a rubber belt 183.

The rotary mill is installed on the upper frame 110 and the lower frame 111, the two device configuration and arrangement is the same and the installation direction is toward the iron plate 402 (see Fig. 5a), respectively. On the other hand, the rotation processing device of the upper position adjustment device (Fig. 3) is installed. 2A and 2B show an example of the configuration of the rotary processing apparatus installed in the lower frame 111. The rotation processing apparatus includes an operation cylinder 260, left and right base guides 261 and 262, left and right base beams 263 and 264, a brush fixing base 265, an air rotating motor 211 and a wire brush 212, It is composed of a calculating stone 213 and the like.

The operation cylinder 260 is installed in the upper and lower frames 110 and 111. That is, the frames 110 and 111 are formed with a square hole 270 (see FIG. 2C) in which the cylinder can be mounted, and the cylinder 260 enters and is installed therein. The rod 266 of the cylinder is fixed to the bottom of the right base beam 263. An upper portion of the base beam 263 is coupled to a left base beam 264, and a brush fixing base 265 is provided thereon. The brush fixing base 265 and the left and right base beams 264 and 263 are penetrated and fixed by one bolt 267. That is, the bolt 267 penetrating the brush fixing base 265 and the left base beam 264 is tightened to the right base beam 263 serving as a nut. Circular holes 271 and 272 are formed at both sides of the left and right base beams 263 and 264 so that the base guides 261 and 262 penetrate the excitation. The base guides 261 and 262 are circular rods installed in the frames 111 and 110, and serve as guides for supporting the operation cylinder 260 when it is operated up and down.

A wire brush 212 and a grinding stone 213 are attached to the brush fixing base 265, and a detachable device 600 (see FIG. 2B) for adjusting the level of the brush is configured at the rear of the brush. (211) is attached. The air rotating motor 211 is a device for generating a rotational force by receiving air, the speed of the rotational force is determined according to the pressure of the air. Air is supplied from a separate external device with a flexible flexible hose 219. A high tension spring 603 is mounted between the wire brush 212 and the grinding stone 213 to push the wire brush detachable slide 602 to adjust the level of the wire brush. The slide device is an air cylinder 604. Works by

Two brush caps 228 and 229 are disposed on the left and right sides of the brush and the grinding stone to be bolted to the brush fixing base 265. That is, the air rotating motor 211, the brush caps (228, 229), the wire brush (212) in sequence through the hole 225 of the brush fixing base 265 by the bolt 227 and the nut 226 in one piece Combined. This series of devices is assembled to replace bolts and nuts when worn out. The wire brush 212 is a form in which a fine wire is embedded in a round disc to be wiped by the wire when rotating. The grinding stone 213 is a whetstone of a round disc of a shape slightly smaller than the wire brush 212 by about 1.5 [mm]. The surface of the inverted stone 213 is made to be inclined at about 45 degrees, so that the surface of the brush 212 side is first contacted when the iron plate 402 is in contact, and the edge of the iron plate 402 is sharply cut. 2a and 2b of the rotary factory is installed symmetrically to each other in the upper frame 110 and the lower frame 111.

The position adjusting device of FIG. 3 is installed in the upper frame 110. It consists of a servo motor 361, a linear gear 362, a gear unit guide 363, a limit bar 364, the limit bar 364 is coupled to the left base guide 360. The end of the gear unit guide 363 is fixed to the lower portion of the upper frame 110, the linear gear 362 in the gear unit guide 363 is moved up and down. The lower end of the straight gear 362 is fixed with a limit bar 364 and a bolt so that the limit bar 364 also moves up and down along the left base guide 360 when the straight gear 362 operates up and down. The linear gear 362 is operated by the servo motor 361 capable of precise rotation control. The base 365 of the motor is connected to the upper frame 110 and fixed. The moisture removing device 131 is installed on the side of the base 365.

Moisture removal device (131, 132) is installed at the rear end of the rotary processing device (Fig. 2) is to inject air toward the plate 402 at the two injection holes (132b). Similar to the detergent spraying device 114, the spray nozzle unit 132b is fixed to the upper and lower frames 110 and 111 and has two injection holes, and a pipe part 132a. The injection nozzle part 132b is fixed in the form of a bolt which can be separated from the pipe part 132a, and the circular pipe is round in the form of a semicircle. The two injection holes 132b are in a line with the wire brush 212 so that they are sprayed first, and the ones installed behind them are sprayed again.

The detergent spraying device 114 is installed in a straight line in front of the above-described rotary processing device. This apparatus consists of a piping part 114a and the injection nozzle part 114b. The injection nozzle part 114b is configured in the form of a sharp tip flippers so that the liquid can be sprayed with a strong pressure when the liquid is injected, and is a bolt-couple type that can be separated from the pipe part 114a. From the cleaning tank 161 to this piping part, it is connected with the flexible flexible hose 114c. The steam pipe 169 is installed inside the cleaning tank 161 and the temperature control device is configured to maintain the temperature of the cleaning agent at a constant high temperature at all times, thereby increasing efficiency. Hydrochloric acid (Hcl) or alkaline liquid is used as a cleaning agent.

Other accessory devices include a control device 411 installed at the rear end of the welding preparation device of FIG. 1, various limit sensors 412 and 413 for limiting the operation of the carriage, and a photosensor 122 for detecting the presence or absence of an iron plate. When the welding preparation device returns after completing the work, a plate plate 403 for smoothly sending the plate is to be configured in the process, and externally necessary for the operation of the dry air and the cylinder to be used for the water removal device (131, 132). There must be a supply of general air.

Hereinafter will be described the operation of the present invention.

In the input portion 401 of the process, the round coil-shaped iron plate is mounted to a facility to release for work. In a facility equipped with a coil to release the top portion 402 of the iron plate while rotating the coil. The top part 402 of the unrolled iron plate is usually removed to a few [m] defective parts and proceeds to the welding machine equipment, the normal welding is made, this apparatus is installed in front of the welding machine.

Since the apparatus is not used for every iron plate, the apparatus usually does not work. The operation of the apparatus can be divided into a case where selection by a driver's needs (step 512) and a case where instructions are executed by an upper calculator (step 511) are executed. In case of working by receiving the signal from the upper calculator, the material to be reprocessed (processed twice in the same line, without heat treatment and oiling) and the preparation coil (Dummy Coil) to meet the conditions of heat treatment during operation after the process stops It is a poem. In this case, since the oxide film on the surface of the iron plate must be removed regardless of the appearance of the material, the apparatus is automatically operated under the instruction of the upper calculator 511.

Next, when the driver needs to make a selection, the device is stored for a long time in the stockyard and scale is generated on the surface of the iron plate, when the oil surface is over-coated, or when the driver judges that the iron plate surface is contaminated. To make it work. In addition, when used only for the purpose of suppressing the generation of step marks, work is carried out at the time of feeding a material having a thickness of 1.5T or more, which has a large influence on the thickness of the material. In particular, when used in the work of more than 2.0T in cold-rolled heat treatment and plating process can be expected a great effect.

Figure 6a shows the preparation before the device of the present invention operates. That is, it is determined whether or not the welding preparation device is used according to the two conditions described above (step 513). If use is selected, the plate gate 403, which connects the process table 404 of the line, goes down (step 514) by operation of the air cylinder to allow the apparatus to enter. Next, the mailed strip 402 proceeds to the work position (step 515) and stops (step 518) when the process is complete. The distance calculation to the work position is calculated using the rotation of the pinch roll installed in the process table 405 (step 517), and the matching of this value is again performed using the detection of the photosensor installed in the process (step 516). This method is a general known technique applied when entering the seam welder for welding after completion of the apparatus. After the entry is completed, the iron plate waits for the start signal (Start Singnal) of the device (step 519). If the non-use is selected in the use selection part of the apparatus (step 520), the iron plate proceeds directly to the welder without stopping in the operation or work position of the mail gate 403.

In addition, after the operation of the apparatus is finished (step 509), the plate gate 403 is up to connect the two tables 404 and 405 of the process to support the iron plate 402 to proceed well, and the iron plate 402. The process proceeds to the welder and prepares for welding.

Next, the operation of the apparatus will be described with reference to Figs. 6B and 6C. When the apparatus is finished with the conditions as shown in Fig. 6-1 and receives a start signal by automatic or driver's operation, the position adjustment of Fig. The device will work. That is, the information of the upper calculator receives the thickness information of the current iron plate. When the servo motor 361 receives a constant signal from the upper calculator and operates in the speed control, the limit bar 364 moves up and down to play a limit role when the upper rotary processing apparatus is down to adjust the height of descent. The steel plate working in the high speed line has a certain range, so the positioning device operates within the range of about 3mm. The lower rotary plant always rises up to a position where the steel plate passes through. This position is adjusted by the rod 266 of the cylinder.

Next, the upper and lower wire brushes 112 and 212 are rotated by the air rotating motor 211 (step 521). At the same time, the upper wire brush 112 is moved downward and the lower wire brush 212 is moved upward (step 522). When the up / down completion signal of the upper and lower wire brushes is received, carriage start preparation is completed (step 524). Here, the driver may select (525) the operation mode of the carriage in advance at high speed or low speed.

The selection step 525 of the work mode is a matter of how fast the carriage proceeds and the operation mode is determined according to the state of the plate. In other words, when the plate is in a contaminated state, the carriage operation speed is increased to increase the removal efficiency. This is expected to delay working time as a whole, but it can be expected to have a big effect on removing foreign matter on the surface of the plate. On the other hand, if the contamination of the plate is not severe, use the high speed mode for the fast working time. In addition, when used only for the purpose of step removal, a thin cold rolled steel sheet uses a high speed mode, and a thick material of 1.5T or more uses a low speed mode. The signal of this mode, which is input in advance on the operation panel 410, is input to the program of the control device (upper calculator) 411 and is applied at the time of operation. The speed of the applied carriage consists of the operation of the servo motor 311. That is, the upper calculator receives a low speed or high speed signal, converts it into a power value, and transmits the same to the servo motor 311, thereby controlling the moving speed of the carriage (step 527).

As the movement of the carriage is started by the signal of the home position sensor 412 and enters the process, a few seconds later, one edge 420 of the iron plate is opened by the photosensors 122 installed on the upper and lower frames 110 and 111 of the apparatus. Will be detected. At this time, depending on whether the cleaner mode 530 is used or not, operation of the detergent spraying devices 113 and 114 in front of the wire brushes 112 and 212 is determined. In other words, when the cleaner mode is used, the cleaner is supplied to the cleaner spraying devices 113 and 114 to spray the cleaner onto the iron plate, and when not in use, only the wire brushes 112 and 212 are operated to remove foreign substances from the iron plate. . This depends on the state of the iron plate. In other words, if the type of foreign matter adhering to the iron plate is thin rust, spraying the cleaning agent, rather the effect is reduced, so do not use at this time. The presence or absence of spraying may be selected in the operation panel 410 before operation according to the state or type of dirt attached to the iron plate. Of course, this mode is not used if it is only used to remove the step.

The detection of the plate width (step 528) is made and the cleaning liquid is sprayed after a few seconds when using the spraying mode 530 of the cleaning agent. Because of the structure of this apparatus, since the detergent spraying devices 113 and 114 are provided at the rear end of the photosensor 122, a time delay (step 531) of about 2 seconds is provided.

The cleaning liquid is sprayed, and then the water removing apparatuses 131 and 132 are started (step 533). The water removal device is a device for spraying dried hot air. In this apparatus, hot air is injected into the plate at a high pressure to remove the solution that has been injected from the cleaner spraying devices 113 and 114 and the foreign matter removed from the wire brushes 112 and 212. The water removal device (131, 132) is composed of two nozzles to spray over the primary and secondary to increase the efficiency. This apparatus continues to operate until the operation of the present welding preparation device is completed regardless of the cleaning mode 530.

As shown in FIG. 5B, the three devices move while acting on the iron plate 402, and the other edge 412 of the iron plate is detected by the photosensor 122 (step 534). The carriage continues and after about two seconds delay (step 535) as before, the injection of the cleaning liquid is completely terminated (step 536). After a few seconds, the carriage reaches its end completely and hits the END sensor 413. The carriage stops and operates in the next mode.

Upon selection of the two-cycle mode 540, the wirebrushes 112 and 212 continue to run and the carriage returns back from the end sensor 413 point. The two-cycle mode is a mode in which the wire brushes 112 and 212 continue to operate while the carriage returns to the groove (step 541). Again it is determined whether or not to use this mode 540 in the operator panel 410 before the device is started. This mode 540 is a mode used to work effectively when not enough removal in one operation. In the two-cycle mode, no spraying of the cleaning agent takes place. Likewise, if the two-cycle mode is not used, the wirebrush operation is stopped when the carriage returns to the groove.

If the carriage returns and after detecting the edge 420 of the iron plate again after using the two-cycle mode (540) (step 542), the water removal device (131, 132) is immediately stopped (step 543), and then the brush operation is stopped and returned. (Step 544). Then, when the carriage touches the home positioner 412, all the work of the welding preparation device is completed.

Referring to FIG. 5, the apparatus of FIG. 5 further illustrates the process of machining the edges of the iron plate to clean the surface of the iron plate by removing the step by applying a wire brush and a grinding stone to the prepared iron plate. One picture. The upper and lower sides of the iron plate are composed of a wire brush and a grinding stone. Step 1 is a process where the iron plate is prepared and the device is not operating yet. Now, when the device is in operation, the rotary processing unit contacts the steel plate, and the brush unit rotates, the grinding wheel is installed on one side, so the edge is sharpened. The degree of sharpening of this edge may vary depending on the thickness of the steel sheet, but adjust it to about 1/2 the thickness of the steel sheet (step 2). In the third step, each foreign material is removed and processed, and thus the welded iron plate can be removed from the edge portion to reduce the step. Figure 5c shows this process in terms of.

When the step is used only for the purpose of removing the level of the brush by the brush detachable device 600 to prevent the wear phenomenon of the brush.

The brush is attached and detached by the high tension spring 603, the slide device 602, and the cylinder 604 provided between the brush and the abrasive stone to prevent wear of the brush.

According to the apparatus of the present invention as described above, it is possible to ensure a good weldability by removing the various types of foreign matter such as an oxide film attached to the iron plate by selecting the operation mode according to the state and type and the cleaning liquid mode to clean and quickly remove it. In addition, by removing the edge of the iron plate and welding, it is possible to remove the step which damages the roll and causes a defect in the product, and also to secure the safety of the worker from harmful chemicals.

Claims (2)

Detergent spraying devices 113 and 114 composed of a pipe portion 114a and an injection nozzle portion 114b; The working cylinder 260 and the left and right base guides 261 and 262, the left and right base beams 263 and 264, the wire brush 212 supported on the brush fixing base 262, and are disposed on the side of the wire brush 212. And the grinding stone 213, the wire brush 212 and the rotary processing device consisting of an air rotating motor 211 to operate the grinding stone 213; Water removal devices 131 and 132 configured to supply the heated air to the iron plate through the pipe part 132a and the injection nozzle part 132b; Welding preparation device for use in a high-speed annealing process, characterized in that the configuration including a control device (411). Receiving the thickness information of the current iron plate in the control device 411, the step of setting the device to a predetermined position by the signal from the control device 411, and the wire brush 112 by the air rotating motor 211 2) the rotation of the 212, the step of moving the upper and lower wire brushes (112, 212) to a predetermined position, the step of starting the movement of the carriage supporting the wire brushes (112, 212), and the carriage Moving the steel plate along the end of the steel plate, determining whether the cleaner spraying devices 113 and 114 installed in front of the wire brushes 112 and 212 are operated according to the working conditions, and the rear side of the wire brushes 112 and 212. Operating the water removal device (131, 132) installed in the; and stopping the operation of the water removal device (131, 132) and the wire brush (112, 212) and returning the carriage to the home position, characterized in that Weld preparation unit control method used by the annealing step.