JPH09103943A - Grinding device and method for inspecting steel plate surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform polishing with high accuracy over a predetermined area at a time, while moving steel plates, whether in the longitudinal or cross direction of the steel plate, or in both the longitudinal and cross directions simultaneously. SOLUTION: A crosswise polishing device 32 includes a grinding wheel pressing mechanism 22 which presses grinding wheels 5 against the surface of a steel plate 2 while the plate is being conveyed; a crosswise moving mechanism 23 which moves the grinding wheels 5 and the grinding wheel pressing mechanism 22 together in the cross direction of the steel plate 2; and a through-plate- direction synchronous moving mechanism 24 which moves the grinding wheels 5 and the grinding wheel pressing mechanism 22 together in the direction of a through plate in synchronization with line speed. A lengthwise polishing device 33, having grinding wheels 5 arranged zigzag along the cross direction of the steel plate 2 and a grinding wheel pressing mechanism for pressing the grinding wheels 5 against the surface of the steel plate while the plate is being conveyed, is placed near the upstream or downstream of the crosswise polishing device 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone mounting device used for the purpose of inspecting microscopic defects occurring on the surface of a steel sheet, and a grindstone mounting method using this grindstone mounting device.

[0002]

2. Description of the Related Art On the surface of a cold-rolled steel sheet or a plated steel sheet, flaws are generated due to unevenness defects in the manufacturing process and the threading process. Many of the flaws are minute, and it is difficult to see them as they are, and it is difficult to detect them even by an inspection method using a flaw detection sensor.

Therefore, an inspection operator partially inspects such a flaw by applying a grindstone. That is,
By applying the grindstone, a difference in gloss appears due to a difference in how the grindstone is applied to the minute unevenness defect portion, and detection can be performed.

By the way, the grindstone mounting work for detecting such a flaw is as wide as possible (maximum plate width is about 1850 mm) of the steel plate, and 1.5 to 5 mm in the longitudinal direction of the steel plate.
It is necessary to uniformly polish the area over 3.5 m. At this time, since many micro defects are generated in the width direction and the longitudinal direction of the steel sheet, it is necessary to carry out grindstone mounting in both directions. On the other hand, if the same portion is polished many times, it may be difficult to detect the unevenness defect due to the whetstone applied to detect the unevenness defect. Therefore, the grindstone is preferably applied once, and it is also necessary to optimally adjust the pressing force according to the hardness of the steel plate. From these, it is understood that this grindstone mounting work is a heavy-duty work that requires skill. Furthermore, the grindstone mounting work is dangerous unless the steel plate is stopped to be conveyed, and therefore the efficiency of the production line is also reduced.

For this reason, various automatic grindstone mounting devices have been conventionally proposed. For example, the actual exploitation Sho 61-14855
As shown in FIG. 13, the whetstone mounting device proposed in No. 8 is, between the rolls 1 and 1 before and after the steel plate pass line,
A drive mechanism 3 that reciprocates at right angles or obliquely with respect to the traveling direction of the steel plate 2, a vertically movable reduction mechanism 4 mounted and supported by a reciprocating member 3a of the drive mechanism 3, and a polishing attached to the tip of the reduction mechanism 4. This is a configuration including a grindstone 5.

Further, the grindstone mounting device proposed in Japanese Utility Model Laid-Open No. 2-63957 is arranged on the front surface side of the steel plate 2 as shown in FIG. 14, and presses the grindstone 5 against the surface of the steel plate 2 with a predetermined pressure. The pressing mechanism 6 and the rear surface side of the steel plate 2 support the steel plate 2 movably before and after the pressing surface of the polishing grindstone 5 against the steel plate 2, and apply a predetermined pressing force in a direction perpendicular to the surface of the steel plate 2. This is a configuration including a constant tension mechanism 7 that moves until it reaches a certain point.

Further, the grindstone mounting device proposed in Japanese Patent Laid-Open No. 5-306977, as shown in FIG.
Lifting mechanism 8 for pushing the lifting plate 8 against the surface of the steel plate 2, and a width direction moving mechanism 9 for moving the lifting mechanism 8 in the width direction of the steel plate 2.
And a longitudinal movement mechanism 10 for moving the elevating mechanism 8 in the longitudinal direction of the steel plate 2.

Further, as shown in FIG. 16, the grindstone mounting device proposed in Japanese Patent Application Laid-Open No. 5-307010, a plurality of polishing grindstones 5, a support 11 for supporting each of these polishing grindstones 5, and these support bodies are provided. The elastic rubber tube 12 is in contact with the upper end of the elastic rubber tube 11, and a gas supply device 13 for supplying compressed air into the elastic rubber tube 12.

Further, as shown in FIG. 17, the grindstone mounting devices proposed in Japanese Patent Laid-Open Nos. 7-186035 and 7-186036 include a hand 14b provided at the tip of an arm 14a of a multi-axis robot 14, This is a configuration in which a polishing grindstone 5 is attached.

[0010]

However, each of the above automatic grindstone mounting devices has the following problems. First of all, the actual development number 61-148558 and the actual development number 2-6.
In the grindstone mounting device proposed in No. 3957, the polishing grindstone 5
Is fixed in the conveying direction of the steel plate 2, so that the polishing grindstone 5 is moved in the width direction while the steel plate 2 is moved in the longitudinal direction to hang the grindstone. Therefore, in the grindstone mounting devices proposed in these Japanese Utility Model Publication Nos. 61-148558 and 2-63957, the polishing direction is slanted, and more than double or multiple is applied. Occurrence or the like makes it difficult to detect the defect.

Further, in the grindstone mounting device proposed in Japanese Patent Laid-Open No. Hei 5-307010, the polishing grindstone 5 provided along the width direction of the steel plate 2 is fixed in the conveying direction of the steel plate 2. 2 will be polished while moving in the longitudinal direction. Therefore, the entire length (width) of the grinding wheel 5 and the steel plate 2
If the widths of the steel sheets are the same, it is effective against the flaws in the width direction of the steel sheet 2, but the width of the steel sheet 2 to be polished is 600
Since it varies in the range of ˜1850 mm, when the entire length (width) of the grinding wheel 5 does not match the width of the steel plate 2, polishing residue occurs or the end of the steel plate 2 hits the grinding wheel 5 and the grinding wheel 5 There is a problem that 5 is damaged. Further, with respect to a flaw in the longitudinal direction of the steel plate 2, the entire grinding wheel 5 is pressed against the steel plate 2 while moving the steel plate 2 in the longitudinal direction, and the cylinder 15 reciprocates in the width direction of the steel plate 2 for polishing. As a result, the polishing direction is slanted, and as a result, the above-mentioned No. 61-148558 and No. 2-63957.
The same problems as those of the grindstone mounting device proposed in No.

On the other hand, JP-A-5-306977, JP-A-7-186035 and JP-A-7-18603.
In the whetstone mounting device proposed in No. 6, in the width direction of the steel plate 2,
It is possible to polish in either direction of the longitudinal direction, and it is easy to control the polishing to be applied only once, but since the steel plate 2 is stopped and the grindstone is applied, there is a problem in work efficiency. . In addition, in the grindstone mounting devices proposed in Japanese Patent Laid-Open Nos. 7-186035 and 7-186036, the steel plate 2 is slightly polished after polishing in either direction due to the reach of the multi-axis robot 14. Since it is moved to perform polishing in the other direction, work efficiency further deteriorates.

Further, in the grindstone mounting device proposed in Japanese Patent Laid-Open No. 5-306977, since the lifting mechanism 8, the width direction moving mechanism 9 and the longitudinal direction moving mechanism 10 are driven by the ball screw, the rotating portion is lubricated. However, when positioning a long stroke at high speed, it is necessary to consider the critical speed due to the shaft diameter and the thread pitch, the rigidity of the joint, the rattling of the ball screw, etc. Therefore, the positioning accuracy is poorer than that of the linear motor drive type. Further, since the polishing condition is preset arbitrarily, various conditions such as the width dimension of the steel plate 2 have to be manually inputted, which causes a problem of complicated operation.

Further, in the grindstone mounting device proposed in Japanese Patent Laid-Open Nos. 7-186035 and 7-186036,
Since the multi-axis robot 14 is used, it is necessary to enclose its movable range with a fence for safety and to secure a wide working area.

The present invention has been made in view of the above-mentioned problems of the prior art. While the steel sheet is moved, it is applied once to polish a predetermined range in either the longitudinal direction or the width direction of the steel sheet. It is another object of the present invention to provide a grindstone mounting device for inspecting a steel sheet surface, which can simultaneously perform the longitudinal direction and the width direction with high accuracy, and a method using the device.

[0016]

In order to achieve the above-mentioned object, the present invention moves a polishing grindstone pressed against the surface of a steel sheet being conveyed in the width direction of the steel sheet, and at the same time, runs the sheet in synchronization with the line speed. In addition, a plurality of polishing whetstones selected according to the width of the steel plate are staggered in the width direction near the upstream side or the downstream side of the polishing whetstone. Then, by doing so, it is possible to carry out polishing within a predetermined range while moving the steel sheet and also by applying it once.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A grindstone mounting device for inspecting a steel plate surface according to the first aspect of the present invention comprises a grindstone pressing mechanism for pressing a polishing grindstone against the surface of a steel plate being conveyed, and a grinding grindstone for each grindstone pressing mechanism in the width direction of the steel plate. In the width direction moving mechanism to move to, the grinding wheel pressing mechanism together with the grinding wheel to move the polishing wheel in the sheet passing direction in synchronization with the line speed, and, if necessary, from the steel sheet width detector. The width direction moving mechanism based on the signal of the movement range control, the synchronous movement speed control of the plate passing direction synchronous movement mechanism based on the line speed information, and the control means for controlling the grindstone pressing force based on the hardness information of the steel plate Further, a retracting mechanism for retracting the grinding stone, the grindstone pressing mechanism, and the width direction moving mechanism in a direction away from the steel plate is added except when the grindstone is applied.

When a predetermined range of the steel plate surface is grinded by using the grindstone mounting apparatus for steel plate surface inspection according to the first aspect of the present invention, the line speed is grinded when the line speed exceeds the efficiency of the grindstone mounting apparatus. After making it equal to the efficiency of the apparatus, the polishing grindstone in which the grindstone pressing force is optimally controlled based on the hardness information of the steel plate is moved in the plate width direction while being moved in the plate passing direction in synchronization with this line speed. At this time, since the moving range of the width direction moving mechanism is controlled based on the signal from the steel plate width detector, the grindstone can be hung up to the full plate width. That is, the two-axis simultaneous operation is performed. When the polishing grindstone reaches the width end of the steel plate, the polishing grindstone is immediately moved in the upstream direction by the length of the grindstone, and the same operation as described above is repeated to hang a predetermined range on the surface of the steel plate. That is, the steel sheet is hung once in the conveyed state.

Further, in the steel plate surface inspection grindstone mounting device of the second invention, the above-mentioned first steel plate surface inspection grindstone mounting device is used as a width direction polishing device, and the upstream side or the downstream side of this width direction polishing device. In the vicinity of, the grinding wheels arranged in a zigzag manner in the width direction of the steel plate and the longitudinal grinding device equipped with the grinding wheel pressing mechanism that presses these grinding wheels against the surface of the steel plate being conveyed are arranged, and if necessary, the longitudinal grinding is performed. The device is provided with a position adjusting mechanism in the steel plate width direction of each grinding wheel for each grindstone pressing mechanism, also, the movement range control of the width direction moving mechanism based on the signal from the steel plate width detector,
The width direction polishing device is equipped with a control means for controlling the synchronous movement speed control of the plate passing direction synchronous movement mechanism based on the line speed information and the grindstone pressing force control based on the steel plate hardness information, and the grindstone pressing force control based on the steel plate hardness information. The means is provided in the longitudinal polishing device, and further, the zigzag arrangement control means of the polishing grindstones based on the signal from the steel plate width detector is provided in the longitudinal polishing device.

When a predetermined range of the steel plate surface is grinded by using the steel plate surface inspection grindstone grinding device of the second aspect of the present invention, first, when the steel plate is ground in the longitudinal direction by using the longitudinal direction grinding device, The respective grinding wheels are arranged in a staggered arrangement in the width direction of the steel plate according to the width of the steel plate. At this time, the number of polishing grindstones to be used is the number corresponding to the width of the steel plate within a range where no polishing residue occurs. And
After that, the grinding wheel having the grinding wheel pressing force optimally controlled based on the hardness information of the steel sheet is pressed against the steel sheet being conveyed. Further, when the steel plate is polished in the width direction by using the width direction polishing device, the same method as that of the above-mentioned first embodiment steel plate surface inspection grindstone mounting device is used. At this time, if the longitudinal direction polishing device and the width direction polishing device are used at the same time, the longitudinal direction and the width direction of the steel sheet can be simultaneously polished.

[0021]

EXAMPLE A steel plate surface inspection grindstone mounting device of the present invention will be described below based on the embodiment shown in FIGS. 1 to 7, and a method of the present invention for mounting a grindstone using this grindstone mounting device will be described with reference to FIGS. 1
2 will be described. FIG. 1 (a) is an overall perspective view showing a grindstone mounting device for inspecting a steel sheet surface according to the first aspect of the present invention, (b) is a view as seen from an arrow A in (a), and FIG. 2 (a) is related to the first aspect of the present invention. Of the steel plate surface inspection whetstone mounting device for whetting the plate passing direction, (b) is a view from the arrow B of (a), and FIG. 3 is for steel plate surface inspection of the first invention. FIG. 4 is a schematic view showing a control system of the grindstone mounting device, FIG. 4 is a schematic view of the grindstone mounting device for inspecting a steel plate surface according to the second aspect of the invention, and FIG. 5A is a steel plate surface according to the second aspect of the invention. An overall perspective view showing a width direction polishing device that constitutes the inspection grindstone mounting device, (b) is a D of FIG.
FIG. 6A is an overall perspective view showing a longitudinal direction polishing device that constitutes the steel plate surface inspection grindstone mounting device of the second aspect of the present invention, and FIG. 6B is an E arrow view of FIG. FIG. 7 is a schematic diagram showing a control system of a grindstone mounting device for steel plate surface inspection of the second invention, and FIG. 8 is a narrow material having a plate width of 600 mm polished by the grindstone mounting device for steel plate surface inspection of the second invention. 9 (a) to FIG. 9 (a) to FIG. 9 (a) to FIG.
FIG. 10D is a view for sequentially explaining the grindstone mounting pattern by the grindstone mounting method for steel plate surface inspection of the first invention, FIG.
FIG. 11 is a diagram showing a grindstone mounting pattern by a width direction polishing device which constitutes the steel plate surface inspection grindstone mounting device of the second invention, and FIG. 11 is a longitudinal direction which constitutes the steel plate surface inspection grindstone mounting device of the second invention. FIG. 12 is a view showing a grindstone mounting pattern by the polishing apparatus, and FIG. 12 is a view showing a grindstone mounting pattern when the width direction and the longitudinal direction are simultaneously grinded by the grindstone mounting apparatus for inspecting a steel sheet surface according to the second aspect of the present invention.

In FIG. 1, reference numeral 21 is a grindstone mounting device for inspecting the surface of a steel plate according to the first aspect of the present invention.
Grinding stone pressing mechanism 22 that presses the grinding grindstone 5 on the surface of the plate with a predetermined pressure, a width direction moving mechanism 23 that moves the grinding grindstone 5 together with the grindstone pressing mechanism 22 in the width direction of the steel plate 2, for example, the width direction moving mechanism. 23, a grindstone pressing mechanism 22, a plate passing direction synchronous moving mechanism 24 that moves the polishing grindstone 5 in the plate passing direction in synchronism with the line speed, and a polishing grindstone 5, a grindstone pressing mechanism 22, a width direction moving mechanism except when the grindstone is being hung. A retracting mechanism 25 for retracting 23 in a direction away from the steel plate 2 is provided.

In the embodiment shown in FIG. 1, an air cylinder is adopted as each of the grindstone pressing mechanism 22 and the retracting mechanism 25. In this embodiment, as shown in FIG. 1B, this grindstone pressing mechanism 2
A grinding wheel 5 is pivotally attached to the rod end of an air cylinder 2 so that the grinding wheel surface and the surface of the steel plate 2 are always in parallel contact with each other in response to deformation and bending of the steel plate 2, and uniform grinding is possible. Is disclosed.

In the embodiment shown in FIG. 1, as the width direction moving mechanism 23, a guide rail 23a is arranged in the width direction of the steel plate 2 at a position above the front surface of the steel plate 2, and a slider is provided on the guide rail 23a. 23b is mounted, that is, a linear servo motor which is one of linear actuators is adopted. When this linear servomotor is adopted, the steel plate 2 can be moved to the full end portion at an arbitrary speed.

Further, in the embodiment shown in FIG. 1, the plate-passing direction synchronous moving mechanism 24 is also similar to the width-direction moving mechanism 23.
Guide rails 24a are arranged on both sides of the steel plate 2 in the sheet passing direction,
A slider 24 is provided on each of the guide rails 24a.
The thing which mounted b is disclosed. Also in the case of the plate passing direction synchronous moving mechanism 24, the one which adopts the linear servo motor like the width direction moving mechanism 23 is disclosed.
The steel plate 2 can be moved in the longitudinal direction in synchronization with the line speed. The plate-passing direction synchronous moving mechanism 24 is shown in FIG.
As shown in FIG. 5, not only the width direction moving mechanism 23, the grindstone pressing mechanism 22, and the polishing grindstone 5 are moved, but only the grindstone pressing mechanism 22 and the grindstone 5 may be moved as shown in FIG.

The grindstone mounting device 21 having the above structure is controlled by a control system as shown in FIG. 3, for example. That is, the signal from the steel plate width detector 26 installed on the conveyance line is taken into the sequencer 27 which is the control means for controlling the grindstone mounting device 21 of the first aspect of the present invention, and the movement range of the width direction moving mechanism 23 is set. Control. Therefore, even if the steel plate 2 meanders, it is possible to hang the grindstone to the full width of the plate.

Further, as the production line control information, information such as line speed information and the material and hardness of the steel plate 2 is used by the sequencer 2.
Taken in 7, and based on the line speed information,
The moving speed of the slider 24b of the threading direction synchronous moving mechanism 24 is controlled in synchronization with the line speed, and based on the hardness information of the steel plate 2, a predetermined pressure is applied to the air cylinder which is the grindstone pressing mechanism 22 by the electropneumatic regulator 22a. Is supplied to control the pressing force to an optimum value according to the hardness of the steel plate 2.

In order to press the grinding wheel 5 against the surface of the steel plate 2, the electromagnetic switching valve 25a is set to the sequencer 27 in order to lower the air cylinder which is the retracting mechanism 25.
You can operate with. The above control is automatically controlled,
You may make it input the setting value arbitrarily by operating the input device 28. In addition, 23c, 24c, and 26a in FIG. 3 show the controllers of the width direction moving mechanism 23, the plate passing direction synchronous moving mechanism 24, and the steel plate width detector 26.

Next, a method of mounting a grindstone according to the present invention using the grindstone mounting device 21 for inspecting a steel plate surface according to the first aspect of the present invention will be described with reference to FIG. First, when the line speed exceeds the efficiency of the grindstone mounting device 21, the line speed is made equal to the efficiency of the grindstone mounting device 21. Then, the sequencer 27 outputs a signal to the electropneumatic regulator 22a based on the hardness information of the steel plate 2 to optimally control the pressing force against the polishing grindstone 5. After these controls are completed, the sequencer 27 outputs a signal to the controllers 23c and 24c to move the polishing grindstone 5 in the plate passing direction L in synchronization with the line speed, while passing the length of the polishing grindstone 5. While being plated, the grinding wheel 5 is moved in the steel plate width direction C from one end of the steel plate 2 to the other. That is, as shown in FIG. 9A, the two-axis simultaneous operation is performed.

When the grinding wheel 5 reaches the other end of the steel plate 2,
The sequencer 27 outputs a signal to the controller 24c,
As shown in FIG. 9B, the plate passing direction synchronous movement mechanism 24 is operated to quickly return the polishing grindstone 5 in the counter plate passing direction -L by the length thereof. At this time, the steel plate 2 is conveyed in the plate passing direction L, and the steel plate 2 moves in the plate passing direction L even while the polishing grindstone 5 returns to the counter plate passing direction -L, so that the polishing grindstone 5 returns a distance. In practice, it may be slightly shorter than the length of the grinding wheel 5.
The polishing grindstone 5 may be returned while the steel plate 2 moves to the stage next to the stage already polished, that is, the stage to be newly polished.

Next, from the state of FIG. 9C, the state of FIG.
By performing the same operation as shown in FIG.
The state shown in (d) is reached, and one reciprocating whetstone mounting operation is completed. By repeating the above operation, the polishing grindstone 5 can be applied once without stopping the steel plate 2.

By the way, when the plate width of the steel plate is 1625 mm, the length of the grinding wheel is 225 mm, and the line speed is 6 m / min, the operation speed of the grinding wheel (the operation speed of the linear servomotor) in the above embodiment is as follows. On the street. Plate passing direction speed (line speed): 0.1 m / sec Steel plate width direction speed (constant speed): 1.4 m / sec Return in the opposite plate passing direction: Return stroke 142 mm Maximum speed 0.75 m / sec Return time 0. 53 sec

In the above case, the steel plate 2 is passed through without stopping, whereas the linear servomotor needs to return in the direction opposite to the passing plate. Therefore, the grindstone-applied pattern has a shape in which it is wrapped by about 53 mm, and the pattern width for one application is about 170 mm, but there is no problem when inspecting for flaws.

In the above-mentioned embodiment, the method of applying the polishing grindstone 5 almost once without stopping the steel plate 2 is disclosed. However, according to the first device of the present invention, the steel plate 2 is stopped,
It is also possible to polish the steel sheet 2 in the width direction and the longitudinal direction. That is, in FIG. 1, the plate passing direction synchronous moving mechanism 24 may be used as the longitudinal moving means. By doing so, it is possible to achieve exactly one-time hanging without wrapping. However, it goes without saying that the work efficiency becomes poor when such a method is used. In the case of polishing in the longitudinal direction, it is advisable to rotate the polishing grindstone 5 by 90 ° as shown in FIG. However, this is not necessary when the polishing grindstone 5 has a square shape in plan view.

In FIG. 4, reference numeral 31 is a grindstone mounting device for inspecting a steel sheet surface according to the second aspect of the present invention, in which a longitudinal polishing device 33 is arranged, for example, in the vicinity of the upstream side of the widthwise polishing device 32. The installation position of the longitudinal polishing device 33 is
It may be near the downstream side of the width direction polishing device 32. Among these, as the width direction polishing device 32, the one having the same configuration as the above-mentioned grindstone mounting device 21 of the present invention is adopted. However, the embodiment shown in FIG. 5 is different from the embodiment shown in FIG. That is,
In the embodiment shown in FIG. 1, the width direction moving mechanism 23, the grindstone pressing mechanism 22, and the polishing grindstone 5 are moved in the plate passing direction in synchronization with the line speed. However, in the embodiment shown in FIG. The direction-synchronized moving mechanism 34 is the grindstone pressing mechanism 2
Since only 2 and the polishing grindstone 5 are synchronously moved in the plate passing direction, the slider 23b of the width direction moving mechanism 23
The guide rail 34a is arranged in a suspended manner, and the slider 34b is installed on the guide rail 34a.

Further, the longitudinal polishing device 33, as shown in FIG. 6, for example, has grinding wheels 5 staggered in the width direction of the steel plate 2, and grinding wheels for pressing these grinding wheels 5 against the surface of the steel plate 2 being conveyed. The pressing mechanism 35, a position adjusting mechanism 36 for adjusting the arrangement position of the polishing grindstone 5 by moving the respective grinding grindstones 5 together with the grindstone pressing mechanism 35 in the width direction of the steel plate 2, and the grinding grindstone 5 except when the grindstone is applied. ，
This structure is provided with a retracting mechanism 37 that retracts the grindstone pressing mechanism 35 and the position adjusting mechanism 36 in a direction away from the steel plate 2.

In the embodiment shown in FIG. 6, as the grindstone pressing mechanism 35 and the retracting mechanism 37, as in the embodiment shown in FIG. 1, air cylinders are respectively adopted. Also in this embodiment, as shown in FIG. 6B, the grinding wheel 5 is pivotally attached to the rod end of the air cylinder, which is the grinding wheel pressing mechanism 35, so that the grinding wheel 5 can be swung freely. The grinding wheel surface and the surface of the steel plate 2 are always in parallel contact with each other to enable uniform polishing.

Further, in the embodiment shown in FIG. 6, as the position adjusting mechanism 36, two guide rails 36a are arranged in the width direction of the steel plate 2 at a position above the front surface of the steel plate 2, and the guide rails 36a are provided on the guide rails 36a. Multiple sliders 3 each
6b is mounted, that is, a linear servo motor which is one of linear actuators is adopted.

The grindstone mounting device 31 of the second aspect of the present invention having the above structure is controlled by a control system as shown in FIG. 7, for example. That is, the signal from the steel plate width detector 26 installed on the transfer line is taken into the sequencer 38 which is the control means for controlling the grindstone hanging device 31, and in the width direction polishing device 32, the width direction moving mechanism 23. The movement range is controlled, and in the longitudinal polishing device 33, the number of the polishing wheels 5 to be used is selected according to the width of the steel plate 2 as shown in FIG. The selected grinding wheels 5 are arranged in a staggered manner by controlling the position adjusting mechanism 36. In addition, FIG. 8 shows an example of a case where the width of the steel plate 2 is 600 mm and the length of the polishing grindstone 5 is 210 mm. Shows.

As the production line control information, information such as line speed information and the material and hardness of the steel plate 2 is used by the sequencer 3.
Taken in 8, and based on the line speed information of these,
The moving speed of the slider 34b in the threading direction synchronous moving mechanism 34 is controlled in synchronization with the line speed, and the steel plate 2
Based on the hardness information of the air cylinders, the air cylinders that are the grindstone pressing mechanisms 22 and 35 are connected to the electropneumatic regulators 22a and 35a.
By this, air of a predetermined pressure is supplied, and the pressing force is controlled to an optimum pressing force according to the hardness of the steel plate 2.

In order to press the polishing grindstone 5 against the surface of the steel plate 2, the electromagnetic switching valves 25a, 37a may be operated by the sequencer 38 in order to lower the air cylinders which are the retracting mechanisms 25, 37. The above control is automatically controlled, but the set value may be arbitrarily input by operating the input device 39. Incidentally, 34c and 3 in FIG.
Reference numeral 6c represents a controller for the sheet passing direction synchronous moving mechanism 34 and the position adjusting mechanism 36.

The control system shown in FIG. 7 controls the selection of the polishing grindstones 5 in the longitudinal polishing device 33 and the movement for the staggered arrangement.
The operator may manually select the polishing grindstones 5 in 3 and move them in a staggered arrangement.

Next, a method of mounting a grindstone according to the present invention using the above-mentioned second steel plate surface inspection grindstone mounting apparatus 31 of the present invention will be described with reference to FIGS. First,
When the line speed exceeds the efficiency of the grindstone mounting device 31, the line speed is set to be the same as the efficiency of the grindstone mounting device 31. Then, based on the signal from the steel plate width detector 26, the sequencer 38 outputs a signal to the controller 36c,
The number of polishing wheels 5 to be used is selected, and the selected polishing wheels 5 are arranged in a staggered manner in the width direction of the steel plate 2. At this time, the grinding wheels 5 on both sides arranged in a staggered manner do not come off from both ends of the steel plate 2 even if the steel plate 2 meanders during conveyance, so that the grinding wheels on both sides are inwardly about 20 mm from both ends of the steel plate 2. The end surface of No. 5 is positioned.

After that, the sequencer 38 outputs a signal to the electropneumatic regulators 22a and 35a based on the hardness information of the steel plate 2 to optimally control the pressing force to the grinding wheel 5.
After these controls are completed, the sequencer 38 outputs a signal to the controllers 23c and 34c, and the width direction polishing device 3
In No. 2, the same control as that of the first grindstone mounting device 21 described above is performed, and the grindstone mounting of the pattern as shown in FIG. 10 is performed. On the other hand, in the longitudinal polishing device 33, a grindstone having a pattern as shown in FIG.

Thus, the optimum polishing in the width direction for inspecting the linear defects in the longitudinal direction of the steel plate 2 and the optimum polishing in the longitudinal direction for inspecting the linear defects in the width direction are shown in FIG.
The pattern shown in FIG. 2 can be performed at the same time and by applying the polishing grindstone 5 once.

By the way, the range of 900 × 900 mm is shown in FIG.
Comparing the method of the present invention in which the grindstone is applied with the pattern shown in FIG. 2 and the case of performing the similar grindstone in the method described in JP-A-7-186036, the time required for the grindstone application is shown in In the method described in -186036, 3
What took 0 seconds could be done in 12 seconds by the method of the present invention.
The size (width × length) of the polishing grindstone used is 50 × 225 mm in the method of the present invention and 50 × 200 mm in the method described in JP-A-7-186036.

In this embodiment, a linear servo motor is used as the actuator, but other actuators such as a linear motor for rotating a ball screw by a rotary motor, oil, a pneumatic cylinder or oil, A structure using another linear motion mechanism such as a pneumatic motor drive may be used. An orthogonal coordinate system may be used as long as it can perform a linear operation. Further, in the present embodiment, the staggered arrangement of the polishing grindstones 5 in the longitudinal polishing device 33 is set to 2
Although the row is shown, there is no problem even if there are three or more rows.

[0048]

As described above, according to the present invention,
Since the grindstone can be hung simultaneously in the width direction or the longitudinal direction of the steel plate, or in the width direction and the longitudinal direction at the same time without stopping the steel plate, the grindstone can be efficiently applied. Further, according to the present invention, unlike a multi-axis robot, it is not necessary to enclose the movable range with a fence for safety, so that a small installation space is sufficient and the space can be effectively used.

[Brief description of the drawings]

FIG. 1 (a) is an overall perspective view showing a grindstone mounting device for inspecting a steel plate surface according to a first aspect of the present invention, and FIG. 1 (b) is a view on arrow A of FIG.

FIG. 2 (a) is an explanatory view of a case where a steel plate surface inspection grindstone mounting device according to the first aspect of the present invention is used to grind a plate passing direction.
(B) is a view on arrow B of (a).

FIG. 3 is a schematic diagram showing a control system of a grindstone mounting device for inspecting a steel plate surface according to the first aspect of the present invention.

FIG. 4 is a schematic view of a grindstone mounting device for inspecting a steel plate surface according to a second aspect of the present invention, as seen in a plane direction.

FIG. 5 (a) is an overall perspective view showing a width direction polishing device that constitutes a whetstone mounting device for inspecting a steel plate surface according to the second aspect of the present invention;
(B) is a D arrow line view of (a) figure.

FIG. 6 (a) is an overall perspective view showing a longitudinal direction polishing device which constitutes a grindstone mounting device for inspecting a steel plate surface of the second invention,
(B) is a view on arrow E of FIG.

FIG. 7 is a schematic diagram showing a control system of a grindstone mounting device for inspecting a steel plate surface according to a second aspect of the present invention.

FIG. 8 is a diagram showing an example of arrangement of polishing grindstones in a longitudinal polishing device when a narrow material having a plate width of 600 mm is polished by the steel plate surface inspection grindstone mounting device of the second invention.

9 (a) to 9 (d) are views for sequentially explaining a grindstone mounting pattern by the steel plate surface inspection grindstone mounting method of the first present invention.

FIG. 10 is a diagram showing a grindstone mounting pattern by a width direction polishing device that constitutes a grindstone mounting device for inspecting a steel sheet surface according to a second aspect of the present invention.

FIG. 11 is a view showing a grindstone mounting pattern by a longitudinal polishing device that constitutes a grindstone mounting device for inspecting a steel sheet surface according to a second aspect of the present invention.

FIG. 12 is a view showing a grindstone mounting pattern when the grindstone mounting device for inspecting a steel plate surface according to the second aspect of the invention simultaneously grinds the width direction and the longitudinal direction.

FIG. 13 is an explanatory view of a grindstone mounting device proposed in Japanese Utility Model Publication No. 61-148558.

FIG. 14 is an explanatory view of a grindstone mounting device proposed in Japanese Utility Model Laid-Open No. 2-63957.

FIG. 15 is an explanatory diagram of a grindstone mounting device proposed in JP-A-5-306977.

16A and 16B are explanatory views of a grindstone mounting device proposed in Japanese Patent Laid-Open No. 5-307010, FIG. 16A is an overall schematic view, and FIG.

FIG. 17: Japanese Patent Application Laid-Open Nos. 7-186035 and 7-1
It is explanatory drawing of the grindstone mounting apparatus proposed by No. 86036.

[Explanation of symbols]

 2 Steel plate 5 Polishing whetstone 21 Whetstone mounting device for steel plate surface inspection 22 Whetstone pressing mechanism 23 Width direction moving mechanism 24 Passing plate direction synchronous moving mechanism 25 Evacuation mechanism 26 Steel plate width detector 27 Sequencer 31 Steel plate surface inspection whetstone mounting device 32 Width direction Polishing device 33 Longitudinal direction polishing device 34 Passing plate direction synchronous movement mechanism 35 Grinding stone pressing mechanism 36 Position adjusting mechanism 37 Evacuation mechanism

Claims (9)

[Claims] 1. A grindstone pressing mechanism for pressing a polishing grindstone against the surface of a steel sheet being conveyed, a width direction moving mechanism for moving the grinding grindstone together with the grindstone pressing mechanism, and a grinding grindstone together with the grindstone pressing mechanism. A grindstone mounting device for inspecting a steel plate surface, comprising a plate-passing direction synchronous movement mechanism that moves in the strip-passing direction in synchronization with a line speed. 2. A moving range control of a width direction moving mechanism based on a signal from a steel plate width detector, a synchronous moving speed control of a sheet passing direction synchronous moving mechanism based on line speed information, and a grindstone pressing based on steel plate hardness information. 2. The grindstone mounting device for steel plate surface inspection according to claim 1, further comprising control means for performing force control. 3. The steel plate surface inspection according to claim 1, further comprising a retracting mechanism for retracting the grinding stone, the grindstone pressing mechanism, and the width direction moving mechanism in a direction away from the steel plate except when the grindstone is applied. Grindstone mounting device. 4. The polishing tool for inspecting a steel plate surface according to claim 1 or 3 is used as a width direction polishing device, and polishing is arranged in a zigzag manner in the width direction of the steel plate near the upstream side or the downstream side of the width direction polishing device. A grindstone mounting device for inspecting a steel plate surface, comprising: a grindstone; and a longitudinal polishing device having a grindstone pressing mechanism that presses each of these polishing grindstones onto the surface of a steel plate being conveyed. 5. The whetstone mounting device for steel plate surface inspection according to claim 4, wherein the longitudinal polishing device is provided with a position adjusting mechanism for each whetstone pressing mechanism in the steel plate width direction of each of the whetstones. 6. A moving range control of a width direction moving mechanism based on a signal from a steel plate width detector, a synchronous moving speed control of a sheet passing direction synchronous moving mechanism based on line speed information, and a grindstone pressing based on steel plate hardness information. 5. The steel sheet surface inspection according to claim 4, wherein the width direction polishing device is provided with control means for performing force control, and the longitudinal direction polishing device is provided with control means for performing grindstone pressing force control based on hardness information of the steel sheet. Whetstone mounting device. 7. A moving range control of a width direction moving mechanism based on a signal from a steel plate width detector, a synchronous moving speed control of a plate passing direction synchronous moving mechanism based on line speed information, and a grindstone pressing based on steel plate hardness information. The width direction polishing device is equipped with control means for controlling the force, and the longitudinal direction polishing device is provided with a control means for staggering the grinding stones based on the signal from the steel plate width detector and controlling the grindstone pressing force based on the hardness information of the steel plate. The steel plate surface inspection grindstone mounting device according to claim 5, further comprising: 8. The steel plate surface inspection grindstone mounting device according to claim 1, wherein the grinding wheel is pressed against the steel plate with a predetermined pressing force and is moved in the width direction of the steel plate in synchronization with the line speed. A method for applying a grindstone for inspecting a steel plate surface, which comprises moving the steel plate in a sheet passing direction and hanging the steel plate once in a conveyed state. 9. The steel plate surface inspection grindstone mounting device according to claim 4, wherein the width direction polishing device moves the width direction of the steel plate while pressing the polishing grindstone against the steel plate with a predetermined pressing force. It moves in the sheet passing direction in synchronism with the line speed, and the longitudinal polishing device presses the grinding wheels arranged in a zigzag pattern in the width direction of the steel plate against the steel plate with a predetermined pressing force, so that the steel plate is conveyed once. A method for applying a grindstone for inspecting the surface of a steel plate, which is characterized in that it is applied.