JPH0752010A - Equipment for grinding both sides of galvanized steel strip - Google Patents

Abstract

PURPOSE:To prevent the side edge part of a steel strip from warping when the side faces of the plated steel strip are ground, and prevent the harmful effects due to accumulation of ground chips by pressing and suppressing the warp of the side edge part of the steel strip due to the turning force of a rotary brush from the opposite side by means of a pressing roll. CONSTITUTION:At least two, side face grinding devices 1 which engages rotary brushes 110, 110a with both side faces of a plated steel strip S to grind both the side faces are provided along the advancing direction of the steel strip. In order to follow the meandering of the steel strip S, fluctuations in driving load of a motor 120 for driving the rotary brush 110 (the side of rotary brush 110a is similar) are detected by a detecting unit 130, and a control panel 140 controls motors 150, 161 to adjust the position of each rotary brush 110. The rotary brush 110 tilts the rotary shaft alternately to different angles and rotates it reversely. Further, in this case, a pressing roll 2 is provided on the undersurface or the upper surface near the side edge of the steel strip to press and suppress the warp of the side edge of the steel strip due to the turning force of the rotary brush 110 from the opposite side by means of the pressing roll 2.

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.

Therefore, in order to completely remove the plating coatings on both side surfaces of the plated steel strip, the present applicant has previously described "equipment for grinding both side surfaces of plated steel strip" (Japanese Patent Publication No. 5-41385).
Proposed. This equipment is "equipment that removes the plating film adhered to both side surfaces of a double-sided plated steel strip, and 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 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 of each device are tilted in the same direction with respect to the traveling direction of the steel strip. The rotating brushes that are adjacent to each other in the traveling direction of the steel strip on the same side of the strip are set so that one brush grinds the steel strip side surface from top to bottom and the other brush from bottom to top, and the rotating brush is driven to rotate. A change in the driving load of the motor is detected by a detector, sent to a control panel, 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. Is featured.

However, also in this equipment, as shown in FIG. 13 (A) or (B), 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.

Further, although a cover is provided to protect the sliding contact portion of the equipment from the grinding powder, the covers themselves also partially overlap with each other and move, so that the accumulation of the grinding powder makes the movement of the cover impossible. Sometimes. For this reason, a non-ground portion of the side surface of the steel strip is formed partially or over the entire length.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a side surface grinding equipment for a plated steel strip which prevents warping of the side edges of the steel strip during side surface grinding of the plated steel strip and prevents adverse effects due to the accumulation of grinding powder. It is an issue.

[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. If the side of the strip is set to grind the side of the strip from top to bottom and the other brush is to grind the side of the strip from top to bottom or from bottom to top, the strip side edge Provide a pressing roll on the lower surface or upper surface in the vicinity, The fluctuation of the driving load of the motor that drives the rotating brush is detected by the detector, sent to the control panel, and the control signal is sent to the motor that moves the rotating brush in the width direction of the steel strip to adjust the position of the rotating brush. The above-mentioned problems are solved by the means characterized in that

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

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. It is preferable that the press roll control panel sends a control signal to the press roll moving mechanism based on a detection signal from the position detector.

It is preferable that a spray nozzle is provided directly below the rotary brush to remove the grinding powder accumulated on the sliding rail cover of the brush support.

[0011]

According to the first aspect of the present invention, since the pressing roll suppresses the warp of the steel strip side edge portion caused by the rotating force of the rotary brush from the opposite side, the side surface of the steel strip is ground completely. Although one side grinding device is theoretically sufficient, a more complete grinding surface can be obtained by tilting a brush rotating in the opposite direction in the opposite direction and adding another one. 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 outer peripheral surface of the inclined brush to come into contact with the side surface of the steel strip over the entire length of the inclined brush.

According to the third aspect of the invention, 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 the proper position. can do.

According to the invention of claim 4, 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.

[0015]

EXAMPLE An example of 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 is directed to the "apparatus for grinding both side surfaces 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 a unit 10 having the same structure as a steel strip S.
Are provided so as to face each other in the width direction.

The rotary shaft 11 of the rotary brush 110 of each device 1
1 may be in the same direction, but as shown in FIG. 6, it is more preferable to alternately incline in the opposite direction with respect to the traveling direction of the steel strip S 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 a 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 attached to a base 160, and a gear train (not shown) is engaged by a medium-low-speed dedicated motor 150. It is slidable along the screw rod 162. That is, the pedestal 163 has a medium- and low-speed dedicated motor 150.
Is mounted, and its motor shaft is connected to the screw rod 162 through a gear train (not shown). Accordingly, when the medium-low speed dedicated motor 150 rotates, the gear train (not shown) screwed into the screw rod 162 is rotated, the mount 163 is guided along the screw rod 162, and is moved forward and backward depending on 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, the pedestal 163 is screwed to the screw rod 162.
Moves toward and away from 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 frame 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, and as shown in FIG. 6, the rotating brush 110 contacts the side surface of the plated steel strip at its central portion, and is described below in the plate width direction. Moves back and forth with the gantry 163, changes in board width,
Following the side position variation, an appropriate brush reduction amount P is always maintained. In the present device 1, the brush drive motor 120 is used to follow the plate width variation and the 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 forwards and backwards in the plate width direction while contacting the side surface of the plated steel strip S may be constant, but as the side surface movement amount increases, the brush 110 moves forwards and backwards at a higher speed to enhance the response to the side surface movement amount. Good. In that case, the speed may be continuously variable, but practically three levels are sufficient.

The above position and speed changes are made 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. With the above operation, it is possible to follow the plate width variation of the plated steel strip S and the position movement of the side surface, and perform the brush grinding while keeping the distance between the side surface and the brush constant. Next, as shown in FIG. 6, the rotary shaft 111 of the rotary brush 110 that moves back and forth in the plate width direction while being in contact with the side surface of the plated steel strip S is a single-sided plated steel strip side surface ((A) in FIG. 11) or both sides. When installed parallel to the side surface of the plated steel strip ((A) of FIG. 12), the plating film on one edge of the side surface of the plated steel strip is ground ((B) of FIG. 11 and (B) of FIG. 12). 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. 12).

Therefore, as shown in FIG. 6, the rotating brush 1
10 has a structure in which the rotary shaft 111 can be tilted, and the rotary shaft 11
1 are alternately inclined at different angles, and the rotation directions are opposite to each other. In this way, theoretically
As shown in (C) of 2, the plating film on the side surface of the double-sided plated steel strip is completely ground, but as described above, the rotating force of the brush causes the vicinity of both side edges of the steel strip S to be
In the actual situation, a warp as shown in FIG. 13A or 13B was generated, and the excessive plating film on the side surface could not be completely removed.

Therefore, in the present invention, as shown in FIGS. 1, 2, and 5, at least one side grinding device 1 is provided along the traveling direction of the steel strip S, and the side grinding devices 1 face each other in the steel strip width direction. The rotating shaft 111 of the rotating brush 110a is inclined in the same direction as the traveling direction of the steel strip S ((A) or (B) of FIG. 5). When two or more side grinding machines 1 are provided,
The rotating brushes 110a adjacent to each other in the traveling direction of the steel strip S on the same side surface of the steel strip S are set so that one brush grinds the steel strip side surface from top to bottom and the other brush grinds from bottom to top (FIG. 5). (C)).

As best shown in FIG. 2, the rotating brush 1
When 10a grinds the side surface of the steel strip from the top to the bottom or from the bottom to the top, the pressing roll 2 is provided on the lower surface or the upper surface near the side edge of the steel strip.

According to the present invention, the warp ((A) or (B) in FIG. 13) of the steel strip side edge portion due to the rotating force of the rotating brush 110a is suppressed by the pressing roll 2 pressing from the opposite side. The grinding of the side surface of the strip is completed (C in FIG. 12).
Theoretically, one side grinding device 1 is sufficient ((A) or (B) in FIG. 5). However, FIG. 5 (C)
As shown in, a more complete grinding surface can be obtained by tilting the brush 110a rotating in the opposite direction in the opposite direction and adding another one. 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 is shaped like a drum. With this shape, as shown in FIGS. 3 and 4, any of the outer peripheral surfaces of the inclined brush 110a can come into contact with the side surface of the steel strip over the entire length thereof. In FIG. 3, 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 110a and the pressing roll 2 is corrected so that the pressing roll 2 is always in the proper position. Need to maintain. Therefore, as shown in FIGS. 7 and 8, the detector 3 for detecting the grinding position between the rotating brush 110a and the side surface of the steel strip is attached to the support base 163 of the brush, and the press roll 2 is attached.
Mechanism 21 for moving the steel strip in the width direction of the steel strip 1
The presser roll control panel 22 sends a control signal to the presser roll moving mechanism 21 based on a detection signal from the grinding position detector 3.

The pressing roll moving mechanism 21 may be a conventional moving mechanism, but is made up of, for example, a support arm 211, a screw rod 212, and a drive motor 213 in the illustrated example. The control signal from the presser roll control panel 22 is the drive motor 2
13 is input to rotate the screw rod 212 to move the support arm 211 forward or backward. Although not explicitly shown in FIG. 1, a stacking sliding type conventional rail cover 16 is provided on the sliding surface between the base 160 and the brush supporting base 163 in order to prevent the grinding powder from falling and accumulating.
4 (FIGS. 9 and 10) are provided. However, in the above-mentioned publicly known equipment, even the removal of the grinding powder that falls and accumulates on the rail cover 164 has not been taken into consideration. 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. 9 and 10, the spray header 4 is provided directly below the rotating brush 110a.
And a plurality of spray nozzles 41 are provided at appropriate positions on the spray header 4. High-pressure water is jetted from the spray nozzle 41. Upward spray nozzle 42
Is for removing foreign matter remaining on the back surface of the steel strip.

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.

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 of the length l of the brush 110a to the minimum diameter D2 (l / D2). Is preferably 0.66 to 0.72. Also,
The inclination angle of the rotating shaft 111 of the brush 110a is 15 to 50.
Degree is preferred.

The pressing roll 2 is installed such that the end surface of the pressing roll 2 exists at a position of 0 to 25 mm from the side surface of the steel strip, and the pass line is set to 0, + is pushed in, and-is escaped. In this case, it is preferably about ± 0 to ± 1 mm.

In this apparatus, for example, in a continuous plating line, two brushes are set as one set, and rotating brushes 1 are provided on both end surfaces of the plating plate.
Although 10a is installed so as to rotate while retracting in the plate width direction while contacting with 10a, it may be installed separately after the plating line, and may be used for side surface grinding other than removal of excessive adhered plating.

Table 1 below shows the grinding results for various materials and dimensions using the equipment of the present invention.

[0039]

[Table 1]

[0040]

EFFECTS OF THE INVENTION According to the present invention, it is possible to completely remove the plating film on both sides of a double-sided electroplated steel strip, which eliminates the need for the conventional edge / trim work after electroplating. . As a result, the electroplating yield is improved. Also, it is possible to operate only one side grinding machine at a minimum,
Since another device can be put on standby for replacement, the work efficiency can be improved.

[Brief description of drawings]

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

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

FIG. 3 is an enlarged plan view of a part of FIG.

4 is a cross-sectional view at each position of FIG.

5 is a side view seen from the line VV in FIG. 2. FIG.

FIG. 6 is a view similar to FIG. 5, showing conventional equipment.

FIG. 7 is a front view of a part of FIG. 1, showing a control unit of the presser roll.

8 is a side view seen from the line VIII-VIII in FIG. 7. FIG.

FIG. 9 is a side view taken along the line IX-IX in FIG.
The grinding powder cleaning part is shown.

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

FIG. 11 is an explanatory diagram of a grinding state of the side surface of the plated steel strip.

FIG. 12 is an explanatory diagram of a grinding state of the side surface of the plated steel strip.

FIG. 13 is an explanatory diagram of warpage of a steel strip side edge portion in conventional equipment.

[Explanation of symbols]

 1: Side grinding device 2: Presser roll 3: Detector 4: Spella header 10: Unit 21: Presser roll moving mechanism 41, 42: Spella nozzle 100: Both sides grinding equipment 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

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 14, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction content]

[0040]

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.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsuo Yamanaka No. 3 Hikari, Oshima, Kashima-cho, Kashima-gun, Kashima-gun, Ibaraki Sumitomo Metal Industries, Ltd. Kashima Steel Works

Claims (4)

[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 width direction of each device are tilted in the same direction with respect to the traveling direction of the steel strip. When two or more side surface grinding machines are provided, the rotating brushes adjacent to each other in the traveling direction of the steel strip on the same side surface of the steel strip, one brush from the top to the bottom of the steel strip side, and the other brush from the bottom to the top. Set to grind,
When the brush grinds the steel strip side surface 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, and the fluctuation of the driving load of the motor that rotationally drives the rotating brush. Detected by the detector and sent to the control panel,
A both-sides grinding equipment for galvanized steel strip, wherein a control signal is sent to a motor for moving the rotary brush in the width direction of the steel strip to adjust the position of the rotary brush. 2. The facility according to claim 1, wherein the rotating brush has a drum shape. 3. 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. 2. The equipment according to claim 1, 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. 4. The equipment according to claim 1, wherein a spray nozzle is provided immediately below the rotating brush to remove the grinding powder accumulated on the sliding rail cover of the brush support.