JP2694797B2 - Equipment for grinding both sides 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 equipment for grinding both sides of a plated steel strip.

[0002]

2. Description of the Related Art In continuous electroplating of steel strip, there is a problem in that excessive plating on the end portion called "overedge coating" occurs due to the concentration of the plating current on both sides of the steel strip. The plating film that is excessively attached due to the current concentration on both sides of the steel strip is brittle even if it has dendrite-like precipitation and is easy to peel off, so it is easy to induce an indentation flaw due to the peeling piece during use such as press molding by the user. It is necessary to prevent the formation of this excessive deposit.

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, also in this equipment, as shown in FIGS. 17A and 17B, the side surface of the steel strip S is warped by the rotating force of the brush 110. If the warp is large, the brushing effect is not sufficient.

A rail cover is provided to protect the sliding contact portion of the equipment from grinding powder.
Since the covers themselves also slide over each other (they partially slide on top of each other), the movement of the rail cover may become impossible due to the accumulation of grinding powder. For this reason, a non-ground portion of the side surface of the steel strip is formed partially or over the entire length.

[0006]

SUMMARY OF THE INVENTION According to the present invention, when the plated steel strip is laterally ground, the warp of the steel strip side edge portion due to the rotating force of the rotating brush is positively utilized to reverse the steel strip side edge portion in advance. It is an object of the present invention to provide a side surface grinding equipment for plated steel strips in which the side surfaces of the coated steel strip are prevented from being adversely affected by the accumulation of the grinding powder while performing a complete side surface grinding by giving a warp to each other.

[0007]

Means for Solving the Problems The equipment for grinding both sides of a plated steel strip according to the present invention is an equipment for removing a plating film adhering to both sides of a double-sided plated steel strip, and facing each other in the width direction of the strip. At least one side surface grinding device for engaging the rotating brushes on both side surfaces of the steel strip to grind the side surfaces is provided along the traveling direction of the steel strip, and the rotation of the rotating brushes facing each other in the width direction of the steel strip of each device. When the shafts are tilted in the same direction with respect to the traveling direction of the steel strip, and two or more side surface grinding devices are provided, one of the brushes is a rotary brush adjacent to the traveling direction of the steel strip on the same side surface of the steel strip. under the strip side from the top, the other brush is set to ground on the lower or al least three path of at predetermined intervals in a pass line of the steel strip passing between the rotating brush Roll up and go up the pass line Forming an oblique path and downwardly inclined path, provided ringer role in and out side of the inclined paths insulated tension occurring in the inclined path from the path of the other regions, Oite the uplink or downlink inclined path The rotating brush is set to grind from the top to the bottom or from the bottom to the steel strip side surface, the fluctuation of the driving load of the motor that rotationally drives the rotating brush is detected by the detector, and sent to the control panel. The above problem is solved by means for sending a control signal to the motor that moves the rotary brush in the width direction of the steel strip to adjust the position of the rotary brush.

It is preferable that the rotating brush has a drum shape.

It is possible to provide the side surface grinding device on either one of the ascending or descending slope path, or to install the side surface grinding device on both the ascending or descending slope path.

When the rotary brush grinds the side surface of the steel strip from top to bottom or from bottom to top, it is preferable to provide a pressing roll on the lower surface or the upper surface near the side edge of the steel strip.

A detector for detecting the grinding position between the rotating brush and the side surface of the steel strip is attached to the support base of the brush, and a mechanism for moving the pressing roll in the width direction of the steel strip is attached to the brush support base to perform the grinding. A control signal can be sent from the presser roll control board to the presser roll moving mechanism based on the detection signal from the position detector.

A spray nozzle may be provided directly below the rotating brush to remove the grinding powder accumulated on the sliding rail cover of the brush support.

[0013]

According to the first aspect of the present invention, the upward sloped path and the downward sloped path are formed in a part of the pass line of the plated steel strip. Due to this inclined path, the tension distribution generated in the width direction of the steel strip becomes imbalanced and becomes maximum between the spans of the pass rolls. As a result, the steel strip side edge portion warps downward in the downward slope pass and upward in the upward slope pass.
By positively utilizing the warp of the side edge portion, the rotary brush is rotated in a direction to cancel the warp. That is, in the descending slope pass, the steel strip side edge portion warps downward, and therefore the rotating brush may be rotated from below the steel strip side surface to above. In the case of an uphill pass, the reverse may be done.

As for the inclination direction of the rotating shaft of the rotating brush, it is preferable to orient the circumferential velocity direction of the rotating brush in the direction opposite to the traveling direction of the steel strip. This is to improve the grinding efficiency.

According to the third and fourth aspects of the present invention, theoretically one side grinding device is sufficient, but the brush rotating in the opposite direction is tilted in the opposite direction to add another one. Provides a more complete ground surface. Further, when it is not necessary, the work efficiency can be improved by keeping the brush as a replacement brush.

According to the second aspect of the present invention, by forming the brush into a drum shape, it is possible for any of the outer peripheral surfaces of the inclined brush to contact the side surface of the steel strip over the entire length of the inclined brush.

According to the fifth aspect of the invention, in the first aspect of the invention, the warp of the steel strip side edge portion due to the inclined path and the warp of the steel strip side edge portion due to the rotational force of the rotating brush are offset. Since the pressing roll suppresses and suppresses the excessive warp of the steel strip side edge portion due to the excessive rotational force of the rotating brush, the side surface of the steel strip is completely ground.

According to the invention of claim 6, when the rotating brush is used for a long period of time, when the brush is worn, the relative positional relationship between the outer peripheral surface of the brush and the pressing roll is corrected, and the pressing roll is always maintained at an appropriate position. can do.

According to the invention of claim 7, water is constantly sprayed on the sliding rail cover of the brush support in the region where the grinding powder is most likely to drop to remove foreign matter.
Does not hinder the movement of the cover.

[0020]

EXAMPLES Examples of the equipment for grinding both sides of a plated steel strip according to the present invention will be described with reference to FIGS.

The present invention relates to the "equipment for grinding both sides of plated steel strip" according to the above-mentioned applicant's application (Japanese Patent Publication No. 5-4138).
No. 5) is improved, first of all, for convenience of explanation, a schematic configuration of the known equipment will be described with reference to FIGS.

First, the equipment for grinding both sides of the plated steel strip is provided on the downstream side of the electroplating equipment. The equipment 100 for grinding both sides of the plated steel strip is provided with at least two side surface grinding devices 1 which engage the rotary brushes 110 on both sides of the steel strip S to grind both sides along the traveling direction of the steel strip. . The side grinding device 1 uses the steel strip S
Are provided facing each other in the width direction.

Rotating shaft 11 of rotating brush 110 of each device 1
1 may be in the same direction, but as shown in FIG.
It is more preferable to incline the steel strip S alternately in the opposite direction, because more reliable grinding is performed.

In order to follow the meandering of the steel strip S, the detector 130 detects the fluctuation of the driving load of the motor 120 that drives the rotating brush 110, sends it to the control panel 140, and sends the control signal to the motors 150 and 161. 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 is made up of a pair of units 10 of identical construction. For convenience of explanation, one unit 10 will be described below.

In the side surface grinding apparatus 1, a pedestal 163 is screwed onto a screw rod 162 which is rotated by a high-speed dedicated motor 161 mounted on a base 160, and a gear train (not shown) is attached to this by a medium-low speed dedicated motor 150. Therefore, it is slidable along the screw rod 162. That is, the medium / low speed dedicated motor 150 is mounted on the frame 163, and its electric motor shaft is connected to the screw rod 162 through a gear train (not shown). Therefore,
When the medium- and low-speed dedicated motor 150 rotates, a gear train (not shown) screwed into the screw rod 162 is rotated, and the pedestal 163 is moved along the screw rod 162, so that the motor 150
Depending on the direction and speed of rotation, it moves back and forth at medium and low speeds.

Further, when the high-speed dedicated motor 161 rotates the screw rod 162, a pedestal 163 which is screwed onto the screw rod 162 is installed.
Moves back and forth along the screw rod 162 at high speed according to the rotation direction and speed of the motor 161.

A rotary brush 110 is provided at the tip of the pedestal 163, and a motor 120 for rotating the rotary brush 110 is attached. 121 is a drive belt. S is a plated steel strip as a material to be ground.
As shown in FIG. 3, the rotating brush 110 moves forward and backward together with the pedestal 163 in the plate width direction while contacting the central part of the brush with the side surface of the plated steel strip, and thus the change of the plate width and the position change of the side surface occur. Following, always maintain an appropriate brush reduction amount P.

In the present apparatus 1, the brush drive motor 120 is used to follow the plate width variation and side surface movement of the plated steel strip S.
The fluctuation of the current value due to the fluctuation of the load is performed as a control input.

The speed at which the brush 110 moves back and forth in the plate width direction while being in contact with the side surface of the plated steel strip S may be constant, but the larger the side surface movement amount is, the faster the speed is moved forward and backward to enhance the responsiveness to the side surface movement amount. Good. In that case, the speed may be continuously variable, but practically three levels are sufficient.

The above-mentioned position and high-speed change are performed by the control panel 140.
As shown in FIG. 1, switching is performed between the high-speed dedicated motor 161 and the medium / low-speed dedicated motor 150, and 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.

Next, the rotating shaft 1 of the rotating brush 110 which advances and retracts in the plate width direction while contacting the side surface of the plated steel strip S.
11 shows the side surface of the single-sided steel strip (see FIG. 15).
(A)) or a double-sided plated steel strip side surface ((A) of FIG. 16) is installed in parallel, the plating film on one edge of the plated steel strip side surface is ground (FIG. 15 (B), FIG. 16). (B)), this is sufficient for the overplating grinding of the side surface of the single-sided plated steel strip, but in the case of the double-sided plated steel strip, unfinished grinding occurs at the end of one surface, which is unsatisfactory ((B) in FIG. 16). ).

Therefore, as shown in FIG. 11, the rotating shaft 111 of the rotating brush 110 has a structure capable of inclining, and the rotating shaft 1
11 are alternately inclined at different angles, and the rotation directions are opposite to each other. By doing so, theoretically, as shown in FIG. 16C, the plating film on the side surface of the double-sided plated steel strip is completely ground. As a result, in the vicinity of both side edges of the steel strip S, a warp as shown in FIG. 17A or 17B was generated, and the excessive plating film on the side surface was not completely removed.

Therefore, in the present invention, as shown in FIGS. 1-8, and particularly FIGS. 2 and 3, at least three pass lines of the steel strip S passing between the rotating brushes 110a are spaced at predetermined intervals.
A book pass / roll 2 is provided to form an upslope path PU and a downslope path PD on the path line.
The ringer roll 3 is provided on the entrance and exit sides of U and PD to insulate the tension generated in both inclined paths PU and PD from the paths in other regions.

As described above, by forming the inclined paths PU and PD, the side edges in the width direction of the steel strip are produced. For example, as shown in FIGS. 2 and 7, in the downward slope path PD, the maximum warp (FIG. 7A) occurs at the aa position in the center of the path. On the contrary, in the up path PU, the maximum warp occurs at the bb position in the center of the path (FIG. 7B).
Occurs.

Therefore, the rotary brush 11 is used in such a direction as to offset the warp by positively utilizing the warp on the side edge of the steel strip.
Determine the direction of rotation of 0a.

In order to improve the grinding efficiency, it is preferable to incline the rotary shaft 111 so that the circumferential velocity direction of the rotary brush 110a is directed in the direction opposite to the traveling direction of the steel strip S.

Therefore, in the upward inclination path PU, the rotary brush 110a is rotated so as to grind the steel strip side surface from top to bottom, and in the downward inclination path PD,
The rotating brush 110a is rotated so as to grind from the bottom to the top with respect to the side surface of the steel strip.

At least one side grinding device 1 is provided along the traveling of the steel strip S, and the rotary shafts 111 of the rotating brushes 110a facing each other in the width direction of the steel strip of each device 1 are in the same direction with respect to the traveling direction of the steel strip S. (A or B in FIG. 2 and A or C in FIG. 7). When two or more side surface grinding devices 1 are provided, the rotating brush 110a adjacent to the progress of the steel strip S on the same side surface of the steel strip S has one brush with the steel strip side surface from top to bottom, and the other brush with the bottom surface. To be ground upward ((C) of FIG. 2).

When the rotational force of the rotary brush 110a becomes excessive, it is necessary to prevent reverse warpage, that is, excessive warpage. Therefore, as shown in FIGS.
When 10a grinds the steel strip side surface from the top to the bottom or from the bottom to the top, the pressing roll 4 is provided on the lower surface or the upper surface near the side edge of the steel strip. (A), (B) in FIGS.
(C) is a diagram (A), (B), and FIG.
(C) Corresponds to each figure.

According to the present invention, the warp of the steel strip side edge portion due to the excessive rotational force of the rotating brush 110a ((A) or (B) of FIG. 17 is suppressed by the pressing roll 4 pressing from the opposite side, The grinding of the side surface of the strip is completed (C in FIG. 16).

Theoretically, one side grinding device 1 is sufficient ((A) or (B) in FIGS. 2 and 3).
As shown in FIGS. 2 and 3C and FIG. 4, a more complete grinding surface can be obtained by tilting the brush 110a rotating in the opposite direction in the opposite direction and adding one more brush 110a. Further, by doing so, when one of the devices 1 is unnecessary, it is possible to improve the work efficiency by making it stand by as a replacement brush.

In the present invention, the rotary brush 110a has a drum shape. With this shape, as shown in FIGS. 5 and 6, either of the outer peripheral surfaces of the inclined brush 110a can contact the side surface of the steel strip over the entire length thereof. 5, the contact state between the rotating brush 110a and the side surface of the steel strip S at the positions a, b, and c is shown in FIG.
(A), (B), and (C) of FIG.

Further, in the present invention, when the rotating brush 110a is used for a long period of time, when the brush 110a is worn, the relative positional relationship between the outer peripheral surface of the brush and the pressing roll 4 is corrected so that the pressing roll 4 is always in the proper position. Need to maintain.

Therefore, as shown in FIGS. 9 and 10, the detector 5 for detecting the grinding position between the rotary brush 110a and the side surface of the steel strip is attached to the brush supporting base 163, and the pressing roll 4 is attached.
Mechanism 21 for moving the steel strip in the width direction of the steel strip 1
The presser roll control board 22 sends a control signal to the presser roll moving mechanism 21 based on a detection signal from the grinding position detector 5.

The pressing roll moving mechanism 21 may be a conventional moving mechanism, but is composed of, for example, a support arm 211, a screw rod 212, and a drive motor 213 in the illustrated example. A control signal from the presser roll control board 22 is input to the drive motor 213 to rotate the screw rod 212 and move the support arm 211 forward or backward. Although not explicitly shown in FIG. 1, on the sliding surfaces of the base 160 and the brush support 163, a stacking slide type conventional rail that moves together with the pedestal 163 in order to prevent the fall and accumulation of grinding powder. -A cover 164 (Figs. 12 and 13) is provided. However, in the above-mentioned known equipment, even the removal of the grinding powder 165 that falls and accumulates on the rail cover 164 as shown in FIG. 14 has not been considered. If the accumulation of the grinding powder is left as it is, the rail cover becomes difficult to move, and as a result, the pedestal 163 cannot move, either.

Therefore, in the present invention, as shown in FIGS. 12 and 13, the spray header 6 is provided directly below the rotating brush 110a.
It was placed, and plurality of spray over nozzle 61 in place of the spray over header 6. High-pressure water is jetted from the spray over nozzle 61. An upward spray nozzle (not shown) is installed to remove foreign matter remaining on the backside of the steel strip.
You may.

With this structure, foreign matter is eliminated by constantly injecting water onto the sliding rail cover 164 of the brush supporting base 163 in the region where the grinding powder is most likely to fall, so that the foreign matter is removed. Will not hinder the movement of the.

In FIGS. 12-14, reference numeral 166 is a grinding powder tray provided conventionally.

The slopes of the inclined paths PU and PD shown in FIGS. 2 and 3 are experimentally determined by the material of the steel strip, the size (thickness, width) of the type of plating, and the like.

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. Further, the inclination angle of the rotating shaft 111 of the brush 110a is preferably 15 to 50 degrees. Length of brush 110a
The ratio of the minimum diameter D ₂ (l / D ₂ ) is 0.66 to 0.72.
Is preferred.

The pressing roll 4 is installed such that the end surface of the pressing roll 4 exists at a position of 0 to 25 mm from the side surface of the steel strip, the pass line is set to 0, and the + direction is pushed in and the − direction is escaped. At this time, it is preferably about ± 0 to ± 1 mm.

In this apparatus, for example, in a continuous plating line, two sets are used as a set and rotating brushes 1
It is installed so that 10a rotates while moving in contact with the plate and moves back and forth in the plate width direction, but it may be installed separately at the subsequent stage of the plating line, and can also be used for side surface grinding other than removal of excessive 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 double-sided electroplated steel strip, if conventional, was also subjected to edge trimming work after electroplating <br/> Is unnecessary. Further, since only one side grinding device can be operated and another device can be put on standby for replacement, the work efficiency can be improved.
Further, the plated steel strip obtained by the equipment of the present invention is
Related to the quality of the end surface
The inconvenience is eliminated.

[Brief description of the drawings]

FIG. 1 is a front view of an equipment for grinding both sides of a plated steel strip according to the present invention.

2 is a side view of a portion of FIG. 1, showing various forms of embodiments of the present invention.

3 is a side view of a portion of FIG. 1, showing various aspects of another embodiment of the present invention.

FIG. 4 is a plan view seen from the line IV-IV in FIG.

FIG. 5 is an enlarged plan view of a part of FIG.

6 is cross-sectional views (A), (B), (C) at respective positions a, b, c in FIG.

7 is cross-sectional views (A), (B), (C) at respective positions a, b, c in FIG.

8 is cross-sectional views (A), (B), (C) at respective positions a, b, c in FIG.

FIG. 9 is a front view of a portion of FIG. 1, showing a position correction system for a press roll according to the present invention.

10 is a side view seen from the line XX of FIG. 9. FIG.

FIG. 11 is a schematic side view of a conventional grinding facility.

FIG. 12 is a side view of a wash water spray unit according to the present invention.

FIG. 13 is a front view seen from the line XIII-XIII in FIG. 12.

FIG. 14 is a front view of a conventional wash water spray unit.

FIG. 15 is an explanatory diagram of a grinding state of the side surface of the plated steel strip.

FIG. 16 is an explanatory diagram of a grinding state of the side surface of the plated steel strip.

FIG. 17 is an explanatory diagram of warpage of a steel strip side edge portion in conventional equipment.

[Explanation of symbols]

1: Side grinding device 2: Pass roll 3: Ringer roll 4: Presser roll 5: Detector 6: Spray header 21: Presser roll moving mechanism 41, 42: Spray nozzle 100: Both sides grinding of plated steel strip Equipment 10: Unit 110, 110a: Rotating brush 111: Rotating shaft 120, 150, 161, 213: Motor 164: Rail cover S: Galvanized steel strip 130: Current detector PU: Upward slope path

 ─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-2-41859 (JP, A) JP-A-58-177261 (JP, A) JP-A-2-52116 (JP, A) Actual development Sho-58- 132648 (JP, U) Actually opened 63-113548 (JP, U)

Claims (7)

(57) [Claims] 1. In a facility for removing a plating film adhered to both side surfaces of a double-sided plated steel strip, the rotating brushes are engaged with both side surfaces of the steel strip so as to face each other in the width direction of the steel strip. 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 steel strip direction are tilted in the same direction with respect to the traveling direction of the steel strip. When two or more grinding devices are provided, the rotating brushes that are adjacent to each other in the traveling direction of the steel strip on the same side of the steel strip, one brush grinds the steel strip side surface from top to bottom, and the other brush grinds from bottom to top. Set to
At least three pass rolls are provided at predetermined intervals on the pass line of the steel strip passing between the rotating brushes to form an upslope pass and a downslope pass on the pass line,
A ringer roll is provided on the entrance / exit side of the inclined path to insulate the tension generated in the inclined path from the paths in other regions, and in the ascending or descending inclined path, the rotary brush is moved from the top to the bottom of the steel strip side surface. Set to grind from bottom to top, the fluctuation of the driving load of the motor that rotationally drives the rotary brush is detected by the detector, and sent to the control panel, and a control signal is sent to the rotary brush in the width direction of the steel strip. Equipment for grinding both sides of galvanized steel strip, characterized in that it is configured to adjust the position of a rotating brush by sending it to a motor that moves to the. 2. The facility according to claim 1, wherein the rotating brush has a drum shape. 3. The equipment according to claim 1, wherein the side surface grinding device is provided on either one of the ascending or descending slope path. 4. The equipment according to claim 1, wherein the side surface grinding device is provided on both the ascending and descending slope paths. 5. When the rotary brush grinds the side surface of the steel strip from top to bottom or from bottom to top, a pressing roll is provided on the lower surface or the upper surface near the side edge of the steel strip. The equipment according to any one of 1 to 4. 6. A detector for detecting a grinding position between the rotating brush and a side surface of the steel strip is attached to a support base of the brush, and a mechanism for moving the pressing roll in a width direction of the steel strip is attached to the brush support base, The equipment according to claim 5, wherein a control signal is sent from the press roll control board to the press roll moving mechanism based on a detection signal from the grinding position detector. 7. A spray nozzle is provided directly below the rotating brush to remove the grinding powder accumulated on the sliding rail cover of the brush support table. Equipment described in paragraph.