JP2812196B2 - Grinding equipment for both side edges of galvanized steel strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an equipment for grinding both side edges of a coated steel strip in the longitudinal direction.

[0002]

2. Description of the Related Art In continuous electroplating of steel strips, there is a problem in that the plating current is concentrated on both side edges of the steel strip, so that excessive edge plating called edge over coating occurs. The plating film that excessively adheres due to current concentration on both side edges of the steel strip has a dendrite-like precipitation and is easy to peel off, so it is easy to induce indentation flaws due to peeling pieces when using such as press molding by the user, It is necessary to prevent the formation of this excessive deposit. Here, the side edge includes a side surface and upper and lower edge surfaces.

In order to completely remove the plating films on both sides of the plated steel strip, the present applicant has previously described "Equipment for grinding both sides of plated steel strip" (Japanese Patent Publication No. 5-41385).
Suggested. This equipment is `` in equipment for removing the plating film adhered to both sides of the double-sided plated steel strip, a rotating brush is engaged with both sides of the steel strip opposite to each other in the width direction of the steel strip, and At least two side grinding devices for grinding are provided along the traveling direction of the steel strip, and the rotating shafts of the rotating brushes facing each other in the width direction of the steel strip are inclined in the same direction with respect to the traveling direction of the steel strip. A rotating brush adjacent to the traveling direction of the steel strip on the same side of the belt is set so that one brush grinds the side of the steel strip from top to bottom, and the other brush grinds from bottom to top, and rotationally drives the rotating brush. And a control signal is sent to a motor that moves the rotating brush in the width direction of the steel strip to adjust the position of the rotating brush. ".

However, even in this equipment, the side surface of the steel strip S is warped by the rotational force of the brush 110, as shown in FIG. 15 (A) or (B). If the warpage is large, the grinding effect of the brush is not sufficient.

[0005] As described above, the both side edges of the steel strip are shown in FIG.
(A), excessive end plating adhesion E occurs.
When the end of the steel strip S is warped due to the rotational force of the brush 110, in the normal grinding with a rotary brush, as shown in FIG. Is generated.

Accordingly, the applicant of the present invention has proposed "a double-sided surface grinding equipment for plated steel strip" for removing the uncut portion e.
(Japanese Patent Application No. 5-201717). This equipment is `` in equipment for removing the plating film adhered to both sides of the double-sided plated steel strip, a rotating brush is engaged with both sides of the steel strip opposite to each other in the width direction of the steel strip, and At least one side grinding device for grinding is provided along the traveling direction of the steel strip, and the rotating shafts of the rotating brushes facing each other in the width direction of the steel strip are inclined in the same direction with respect to the traveling direction of the steel strip. In the case where two or more side grinding devices are provided, rotating brushes adjacent to each other in the traveling direction of the steel strip on the same side of the steel strip, one of which brushes the steel strip side from top to bottom, and the other brush from bottom to top. If the brush is set to grind and the brush grinds the steel strip side from top to bottom or from bottom to top, a pressing roll is provided on the lower surface or upper surface near the steel band side edge, and the rotary brush is driven to rotate. Fluctuation of the driving load of the motor Detected by output device, sends to the control panel, the control signal said rotary brush and said configuration was that "to adjust the position of the rotary brush is sent to the motor that moves in the width direction of the steel strip.

[0007] However, even with this equipment, as shown in FIG. 14 (C), excessive plating adhered portions g still remain above and below the steel strip side edges.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a double-sided steel strip grinding apparatus capable of smoothly removing excess plating on both sides of a double-sided steel strip.

[0009]

SUMMARY OF THE INVENTION An apparatus for grinding both side edges of a plated steel strip according to the present invention is a facility for grinding plating films adhered to both longitudinal edges of a double-sided plated steel strip. At least two side edge grinding devices are provided along the traveling direction of the steel strip to grind the side edges by engaging a drum-shaped rotary brush with both side edges of the steel strip so as to face each other. The rotation axes of the drum-shaped rotating brushes facing each other are inclined in the same direction with respect to the traveling direction of the steel strip, and the rotating axes of the drum-shaped rotating brushes adjacent to the traveling direction of the steel strip on the same side of the steel strip are opposite to each other. The brush is set so that one brush grinds the steel band side edge from top to bottom, and the other brush grinds the steel band side edge from bottom to top. With side edges when grinding from top to bottom or bottom to top A pressing roll is provided on the lower surface or the upper surface of the steel sheet, and a first pressing roll moving mechanism for moving the pressing roll in a direction perpendicular to the steel strip surface is provided, the first pressing mechanism is supported and the mechanism is moved in the steel strip width direction. (2) The presser roll moving mechanism is attached to the brush support base, and the fluctuation of the driving load of the motor for rotating the drum-shaped rotary brush is detected, and the brush support base is moved in the steel strip width direction to adjust the brush grinding load. A grinding load adjuster is attached to a base, and a grinding position detector for detecting a grinding position between the drum-shaped rotary brush and a side edge of the steel strip is attached to the brush support base, and a grinding position detection signal from the grinding position detector is provided. To the presser roll control panel, and based on a control signal from the control panel, controls the second presser roll moving mechanism, and attaches a warp detector to the base to detect a warp amount of the steel strip end. , The above object is achieved by means for sending a warp amount detection signal from a warp detector to the presser roll control panel and controlling the first presser roll moving mechanism based on a control signal from the control panel. doing.

[0010]

According to the equipment of the present invention, the presser roll presses from the opposite side to suppress the warpage of the steel strip side edge due to the rotational force of the rotary brush. Since the rotating shafts are tilted in opposite directions to each other with the rotating brush adjacent to the steel strip traveling direction and the rotating direction is reversed, the plating layers on the side surfaces and the upper and lower side edge surfaces of the steel strip can be ground. .

By moving the presser roll up, down, left and right with respect to the steel strip side edge, the amount of warpage of the steel strip side edge can be adjusted, whereby the amount of plating grinding can be adjusted.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to FIGS. 1-13, an embodiment of the both-side grinding equipment for plated steel strip of the present invention will be described.

The present invention relates to a "grinding equipment for both sides of a plated steel strip" (Japanese Patent Publication No. 5-4138) according to the above-mentioned application of the present applicant.
5), the schematic configuration of the known facility will be described first with reference to FIGS. However, not all of the equipment shown in FIGS.

First, the both-side grinding equipment for the plated steel strip is provided downstream of the electroplating equipment. In the both-side grinding apparatus 100 for the plated steel strip, at least two side grinding apparatuses 1 are provided along the traveling direction of the steel strip, in which the rotating brush 110a is engaged with both sides of the steel strip S to grind both sides. . The side grinding device 1 uses the steel strip S
Are provided facing each other in the width direction.

In the known equipment, the rotating brush has a regular cylindrical shape, but in the equipment of the present invention, it has a drum shape.

The rotating shaft 11 of the rotating brush 110 of each device 1
As shown in FIG. 6, 1 is alternately inclined in the reverse direction with respect to the traveling direction of the steel strip S.

In order to follow the meandering of the steel strip S, a change in the driving load of the motor 120 for driving the rotating brush 110a is detected by the detector 130 as shown in FIG.
And a control signal is sent to the motors 150 and 161 to adjust the position of the rotating brush 110.

Although such a control system is provided in both units 10, only one unit 10 is shown for convenience of explanation.

The device 1 comprises a pair of units 10 of identical construction. For convenience of explanation, one unit 10 will be described below. The side grinding device 1 is screwed with a brush support base 163 to a screw rod 162 that is rotated by a high-speed dedicated motor 161 attached to a base 160, and further engaged with a gear train (not shown) by a medium-low speed dedicated motor 150. Thus, it is slidable along the screw rod 162. That is, a motor 150 dedicated to middle and low speed is mounted on the gantry 163, and its motor shaft is connected to the screw rod 162 via a gear train (not shown). Therefore, when the motor 150 for medium and low speeds rotates, a gear train (not shown) screwed to the screw rod 162 rotates, and the gantry 163 moves along the screw rod 162, and moves forward and backward according to the rotation direction and the rotation speed of the motor 150. Move at medium to low speed.

When the high-speed dedicated motor 161 rotates the screw rod 162, a frame 163 screwed to the screw rod 162.
Moves back and forth along the screw rod 162 at high speed according to the rotation direction and speed of the motor 161.

A rotating brush 110a is provided at the tip of the base 163.
And a motor 120 for rotating the rotating brush 110a is attached. 121 is a drive belt. S is a plated steel strip as a material to be ground, and FIG.
As shown in the figure, the rotating brush 110a advances and retreats together with the gantry 163 in the plate width direction while contacting the central portion thereof with the side surface of the plated steel strip, as described below. Following, the appropriate brush reduction amount P is always maintained.

In the present apparatus 1, the variation in the width of the plated steel strip S and the movement to the side are controlled by the brush drive motor 120.
The change of the current value due to the change of the load is performed as a control input.

The speed at which the brush 110a moves back and forth in the plate width direction while contacting the side surface of the plated steel strip S may be constant.
It is preferable that the larger the lateral movement amount is, the faster the movement is made, and the responsiveness to the lateral movement amount is improved. In this case, the speed may be continuously variable, but practically, about three levels are sufficient.

The above-described position and speed changes are performed by the control panel 140.
According to FIG. 4, the switching between the high-speed dedicated motor 161 and the middle-low speed dedicated motor 150 is performed, and the forward / reverse rotation and rotation speed control are performed. By the above-described operation, it is possible to follow the fluctuation of the plate width of the plated steel strip S and the movement of the position of the side surface, and perform the brush grinding while keeping the distance between the side surface and the brush constant.

As described above, in the conventional equipment, the rotating shaft 111 of the rotating brush 110a which advances and retreats in the sheet width direction while contacting the side surface of the plated steel strip S is parallel to the side surface of the single-side plated steel band or the side surface of the double-side plated steel band. When it is installed on the side, the plating film on one edge of the side of the plated steel strip is ground (Fig. 1
4 (B)). This is sufficient for the overplating grinding of the side surface of the single-sided plated steel strip. However, in the case of the double-sided plated steel strip, the unrecovered grinding occurs at the end of one side (see FIG. 1).
4 (B)).

Therefore, in the above-mentioned known equipment, as shown in FIG. 3, the rotating shaft 111 of the rotating brush 110a is structured to be inclined, and the rotating shaft 111 is alternately inclined at different angles, and the rotating directions are opposite to each other. I do. In this way, theoretically, the plating film on the side surface of the double-sided plated steel strip is completely ground as shown in FIG. 14C, but as described above, the rotational force of the brush is As a result, warpage as shown in FIG. 15 (A) or (B) was generated near both side edges of the steel strip S, and the actual situation was that the excessive plating film on the side face could not be completely removed.

Therefore, the applicant of the present invention has disclosed the aforementioned Japanese Patent Application No. Hei.
No. 01717 proposed an improved facility. In this improved equipment, as shown in FIGS. 1, 2, and 3, at least one side grinding device 1 is provided along the traveling direction of the steel strip S, and the rotating brush 110a of the rotating brush 110a facing the steel strip width direction of each device 1 is provided. The rotating shaft 111 is inclined in the same direction with respect to the traveling direction of the steel strip S. When two or more side surface grinding devices 1 are provided, the rotating brush 110a adjacent to the steel strip S on the same side in the traveling direction of the steel strip S is arranged such that one brush is on the steel strip side from top to bottom, and the other brush is It is set to grind from bottom to top (FIG. 2).

As best shown in FIG.
When 10a grinds the side surface of the steel strip from top to bottom or from bottom to top, the holding roll 2 is provided on the lower surface or the upper surface near the steel band side edge.

According to this improved equipment, the rotating brush 110
Since the pressing roll 2 presses and suppresses the warpage ((A) or (B) of FIG. 15) of the steel strip side edge due to the rotational force a, grinding of the steel strip side surface is completely performed (FIG. 15). 14 (C)).

However, as described above, excessive plating adhered portions g still remain on the upper and lower surfaces of the side edge of the steel strip.

Therefore, in the equipment of the present invention, as will be described later, the warp of the steel strip side edge caused by the rotating force of the rotating brush 110a is positively used to remove the excessively plated portion g, and the plating film is removed. And the plating film on the side surface is completely removed.

The features of the equipment of the present invention will be described below, omitting the parts already described.

As shown in FIG. 1-5, in the equipment of the present invention, the drum-shaped rotating brush 110a is engaged with both side edges of the steel strip S so as to face each other in the width direction of the steel strip S, and the side edges are formed. At least two side edge grinding devices 1 for grinding are provided along the traveling direction of the steel strip. The rotating shafts 111 of the hourglass-shaped rotary brushes 110a facing each other in the steel strip width direction are inclined in the same direction with respect to the traveling direction of the steel strip S, and are adjacent to the traveling direction of the steel strip on the same side surface of the steel strip S. Rotating drum brush 11
The rotation shafts 111 of 0a are inclined in opposite directions. The rotation direction of the adjacent drum-shaped rotary brush 110a is set so that one brush grinds the steel strip side edge from top to bottom, and the other brush grinds from bottom to top. When the brush 110a grinds the steel strip side edge from top to bottom or from bottom to top, a holding roll is provided on the lower surface or upper surface near the steel strip side edge. Hold down the presser roll 2 as shown in FIG.
As shown in FIG. 1, the first presser roll moving mechanism 30 for moving the side surface and the side edge surface of the steel strip S in the vertical direction Y of the steel strip surface.
0 is provided. Supporting the first mechanism 300 and its mechanism 30
The second presser roll moving mechanism 21 for moving 0 in the steel strip width direction X is attached to the brush support base 163.

The first presser roll moving mechanism 300 is composed of a combination of a conventional gear train or ring mechanism and a conventional motor or fluid pressure cylinder.

The second pressing roll moving mechanism 21 may be a conventional moving mechanism.
It consists of a screw rod 212 and a drive motor 213. A control signal from the presser roll control panel 22 is input to the drive motor 213 to rotate the screw rod 212 and move the support arm 211 forward or backward.

When the rotating brush 110a is worn over a long period of time, when the brush 110a is worn, it is necessary to correct the relative positional relationship between the outer peripheral surface of the brush and the pressing roll 2, and to always maintain the pressing roll 2 at an appropriate position.

Therefore, as shown in FIGS. 1 and 4, a detector 3 for detecting the grinding position between the rotary brush 110a and the side surface of the steel strip.
Is attached to the brush support base 163, and the second mechanism 21 for moving the presser roll 2 in the width direction of the steel strip is mounted to the brush support base 163, and the presser roll control panel 22 is controlled based on a detection signal from the grinding position detector 3. A control signal is sent to the second presser roll moving mechanism 21.

On the other hand, as shown in FIG. 4, a warp detector 301 for detecting the distance (warp) from the end of the steel strip S is mounted on the base 16.
0, the detection signal is sent to the presser roll control panel 22, and the first presser roll moving mechanism 300 is controlled based on the control signal from the control panel 22.

In the present invention, the rotary brush 110a is shaped like a drum. By adopting this shape, FIG.
As shown in FIG. 9A and FIG.
Over its entire length, any of its outer peripheral surfaces can contact the steel strip side surfaces.

The representative positions of the drum-shaped rotary brush 110a in FIG. 8, that is, the right end P21, the center P22, and the left end P2
Reference numeral 3 corresponds to P21, P22, and P23 in FIGS. FIG. 9A shows a theoretical brush contact surface F (cross inclined region) when the steel strip side edge is not warped. In this case, the brush recirculation grinding width (the width of the brush wrapping around the steel strip surface side and shaving the surface) K is about 1-3 mm. FIG. 9B shows a case where the steel strip is warped by the brush rotational force. In this case, the brush recirculation grinding width K is about 5 to 30 mm.

FIG. 10A shows a case where the warpage is reduced by the press roll. In this case, K is about 1-3 mm. FIG. 10B shows a case in which the presser roll is slightly lifted in the steel strip surface vertical direction Y (FIG. 5). In this case, K is about 10 mm.

On the other hand, when the conventional cylindrical rotary brush 110 is simply installed inclined with respect to the side surface of the steel strip as shown in FIG. 12, a brush contact surface F as shown in FIG. 13 is obtained. In this case, a theoretical contact surface without warpage of the steel strip is shown.

In the above description, the change in the brush contact surface due to the presence or absence and position of the presser roll and the difference in the shape of the rotary brush is visually exaggerated. FIG. 11 shows the grinding width due to the change in the position of the presser roll. Is quantitatively shown.

The position x, y of the press roll in FIG.
Corresponds to the positions x, y in FIG. FIG.
Corresponds to K in FIG. 10B.

The grinding state of the plating film when the side edge of the steel strip is actually ground by the facility of the present invention will be described with reference to FIGS.

FIG. 6 is a plan view showing the lower half of FIG. 2, in which the steel strip S travels from right to left, and the rotary brush 1 on the upstream side.
10a shows an example in which the steel strip side edge is ground from top to bottom, and the rotary brush 110a on the downstream side grounds the steel strip side edge from bottom to top.

In FIG. 7, (A11), (A1)
2) and (A13) are the upstream rotating brushes 110a in FIG.
Shows the contact state between the brush and the steel strip at each of the representative positions P11, P12, and P13. (B11) and (B1) in FIG.
2) and (B13) show the diagrams (A11), (A12), and (A1).
The grinding state of the steel strip plating film corresponding to 3) is shown.

In FIG. 7, (A21), (A22),
(A23) shows the contact state between the brush and the steel strip at each of the representative positions P21, P22, and P23 of the downstream rotary brush 110a in FIG. (B21), (B22),
(B23) shows the grinding state of the steel strip plating film corresponding to FIGS. (A21), (A22), and (A23), respectively.

As described above, in the present invention, by adjusting the position of the presser roll 2 in the X and Y directions, the amount of warpage of the steel strip side edge is adjusted. The upper side of the steel strip side edge is mainly ground, and the lower side of the steel strip side edge, which has not been possible with the downstream rotating brush 110a, is also mainly ground. as a result,
As shown in FIG. 7 (B23), the plating film on the side surface of the steel strip side edge is completely removed, and a smooth plating film having the same thickness as the other portions on the side edge upper and lower surfaces is obtained. .

When the rotation direction of the rotating brush 110a is reversed, the inclination direction of the brush rotating shaft 111 may be reversed. In this case, the operation described above is completely reversed.

The position of the presser roll 2 is determined by changing only the distance y in the Y direction, changing only the distance y in the X direction,
Alternatively, the distances x and y can be simultaneously changed in the X and Y directions.

The position of the presser roll 2 is such that the end face of the presser roll 2 exists at a position of x = 0 to 25 mm from the side surface of the steel strip. Y = ± 0 ± 1m when running away
m is preferable.

The ratio (D1 / D2) of the maximum diameter D1 to the minimum diameter D2 of the hourglass brush 110a is preferably 1.02 to 1.30, and the ratio (1 / D2) of the length 1 of the brush 110a to the minimum diameter D2. Is preferably 0.66 to 0.72. Also,
The angle of inclination of the rotating shaft 111 of the brush 110a is 15 to 50.
Degree is preferred.

In this apparatus, for example, in a continuous plating line, two sets are used as a set and rotating brushes 1
Although it is installed so that 10a rotates while contacting and retreats in the width direction of the plate, it may be separately installed at the subsequent stage of the plating line, and may be used for side grinding other than removal of excessively adhered plating.

The results of grinding various materials and dimensions using the equipment of the present invention are shown in Table 1 below.

[0056]

[Table 1]

[0057]

According to the present invention, it is possible to completely remove the plating film on both sides of the double-sided electroplated steel strip. Is also removed at the same time so that the thickness of the plating film on the other partial surface is substantially the same, and a smooth plating film can be obtained. Conventionally, the need for edge trimming after electroplating is eliminated. As a result, the yield of electroplating is improved. Further, the operation can be performed with at least two side grinding devices, and another device can be put on standby for replacement, so that the operation efficiency can be improved.
Further, when the plated steel strip obtained by the equipment of the present invention is processed later (particularly, a molding step), the disadvantages related to the end face quality are eliminated.

[Brief description of the drawings]

FIG. 1 is a front view of a facility for grinding both side edges of a plated steel strip according to the present invention.

FIG. 2 is a plan view of a part of FIG.

FIG. 3 is a side view taken along line III-III in FIG. 2;

FIG. 4 is an enlarged detailed front view of a part of FIG. 1;

FIG. 5 is an explanatory diagram showing a positional relationship between a holding roll and a steel strip edge.

FIG. 6 is a partial plan view of FIG. 2 and is an explanatory diagram showing each representative position of the rotating brush.

FIG. 7 is an explanatory view showing a grinding state of a steel strip side edge at each position of the rotary brush of FIG. 6;

FIG. 8 is an explanatory diagram showing respective representative positions of the rotary brush on the downstream side in FIG. 6;

9 is a side view showing a contact surface between the rotating brush and the side surface of the steel strip in FIG. 8, showing a case where the steel strip is not warped (A) and a case where it is warped (B).

FIG. 10 is a side view showing a contact surface between the rotating brush and the side surface of the steel strip in FIG. 8, in a case where warpage of the steel strip is reduced by the press roll (A), and when the press roll is moved upward. (B) is shown.

11 is a graph showing the relationship between the position of the presser roll shown in FIG. 5 and the grinding width of the steel strip by the rotating brush.

FIG. 12 is a plan view showing a contact position relationship between a conventional cylindrical rotary brush and a steel strip.

FIG. 13 is a side view showing a contact surface between a rotating brush, a side surface of a steel strip, and a steel strip in FIG. 12;

FIG. 14 is an explanatory view showing a grinding state of a steel strip side surface by a conventional grinding facility.

FIG. 15 is an explanatory view of warpage of a steel strip side edge in a conventional device.

[Explanation of symbols]

 1: Side grinding device 2: Holding roll 3: Detector 4: Spray header 10: Unit 21: Second holding roll moving mechanism 41, 42: Spray nozzle 100: Grinding equipment on both sides of plated steel strip 110, 110a: Rotating brush 111: Rotating shaft 120, 150, 161, 213: Motor 130: Current detector 164: Rail cover S: Plated steel strip 300: First press roll moving mechanism 301: Position detector

Continuation of the front page (56) References JP-A 62-141452 (JP, U) JP-A 3-15055 (JP, U) JP-B 5-41385 (JP, B2) (58) Fields surveyed (Int) .Cl. ⁶ , DB name) B24B 9/00-9/02

Claims (1)

(57) [Claims] In a facility for grinding a plating film adhered to both longitudinal edges of a double-sided plated steel strip, a drum-shaped rotary brush is engaged with both lateral edges of the steel strip so as to face each other in the width direction of the steel strip. At least two side edge grinding devices are provided along the traveling direction of the steel strip so as to grind the side edges, and the rotating shafts of the drum-shaped rotary brushes facing each other in the width direction of the steel strip with respect to the traveling direction of the steel strip. The rotation axes of the drum-shaped rotary brushes adjacent to each other in the traveling direction of the steel strip on the same side of the steel strip are tilted in opposite directions to each other, and the rotation direction of the adjacent drum-shaped rotary brush is changed to one brush. The steel strip side edge is set to grind from top to bottom, the other brush is set to grind from bottom to top, and when the brush grinds the steel strip side edge from top to bottom or from bottom to top, the steel strip side edge is set. Provide a presser roll on the lower or upper surface in the vicinity,
A first presser roll moving mechanism for moving the presser roll in a direction perpendicular to the steel strip surface is provided, and a second presser roll moving mechanism for supporting the first mechanism and moving the mechanism in the steel strip width direction is provided on the brush support base. Attaching, detecting the fluctuation of the driving load of the motor that rotationally drives the drum-shaped rotary brush, mounting the grinding load adjuster for adjusting the brush grinding load by moving the brush support base in the width direction of the steel strip, A grinding position detector for detecting a grinding position between the drum-shaped rotary brush and the side edge of the steel strip is attached to the brush support base, and a grinding position detection signal from the grinding position detector is sent to a presser roll control panel, and the control is performed. The second presser roll moving mechanism is controlled based on a control signal from the board, and a warp detector for detecting a distance (warp amount) from an end portion of the steel strip is attached to the base, and a warp from the warp detector is provided. Quantity detection signal Feeding the Kiosae roll control panel, both side edges grinding equipment plated steel strip was characterized by controlling said first pressing roll moving mechanism based on the control signal from the control panel.