JPH05255888A - Conductor roll grinding device for electroplating line of metallic band - Google Patents

Abstract

PURPOSE:To effectively grind only the defective parts of conductor rolls in an electroplating line for a metallic strip by detecting the defects on the surfaces of the conductor rolls and moving grinding jigs for the conductor roll surfaces to the defective positions by the results of the detection. CONSTITUTION:The strip 1 is passed through the inlet side conductor rolls 2 and dam rolls 20 in respective plating cells 13 and is put out from the plating cells 13 after being plated in the plating cells 13 at the time of electroplating metals on the surfaces of the strip 1 by passing the strip through the many plating cells 13. The surface of the strip 1 after this plating has a surface defect by the generation of the roll pressing flaw, etc., if there is the flaw on the surface of any of the conductor rolls 2. The flaw of the strip surface is detected by a surface flaw detector at this time and the grinding jig 3 is moved along a guide roll 30 to the position of the flaw on the surface of the conductor roll 1 by the result of the detection, by which the surface is ground and the surface defect of the conductor roll 2 is removed. The metal plated strip having no flaw on the surface is thus produce with a good product yield.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for polishing conductor rolls in a metal strip electroplating line.

[0002]

2. Description of the Related Art A conductor roll 2 used in an electroplating line facility such as electrogalvanizing is partitioned by a dam roll 20 from a plating tank 13 as shown in FIG. When the plating liquid is applied to the conductor roll 2 due to defects or partial wear, the roll 2 is plated,
This is the roll-shaped flaw of the metal strip 1. Moreover, even if foreign matter such as dust or insects adheres to the conductor roll 2, it may cause a flaw.

As a solution to the above problem, as shown in FIG. 8, a polishing jig 3 is installed on the conductor roll 2 so as to slide in the lengthwise direction to polish the roll surface.

[0004]

This polishing jig 3 slides at a speed of 1 m / min with a scotch bright polishing part to remove foreign matters. Normally, however, it is possible to remove foreign matters with one polishing operation. I can't, so it depends on the degree,
It is necessary to make 3 to 10 reciprocations of the entire roll length. On the other hand, it is possible to solve the problem by increasing the amount of reduction of the polishing jig 3, but the disadvantage that the life of the conductor roll 2 is shortened due to abrasion is also conversely created.

For this reason, in the present situation, when a conductor roll-like flaw on the surface of the metal band is found by a monitor on the inspection table, the conductor roll is searched for and removed by hand. If it is delayed, a conductor roll-like flaw will be generated on the surface of the metal strip over a long distance, and the product yield will be deteriorated.

The present invention was devised in view of the above problems of the prior art, and enables early detection of the occurrence of a conductor roll-induced flaw and enables the surface of the corresponding conductor roll to be polished automatically. It aims to improve the product yield.

[0007]

Therefore, the present invention relates to a polishing apparatus for automatically polishing a conductor roll provided on an electroplating line of a metal strip, which moves in the length direction of the conductor roll and A polishing jig for polishing, a surface defect meter which is installed behind the conductor roll in a state of being divided into a plurality of parts in the width direction of the metal band, and which detects flaws on the surface of the metal band, and these surface defect meters. A control device for inputting the detection signal of the above, moving the polishing jig to the surface portion of the conductor roll corresponding to the detected position in the metal band width direction with the flaw, and outputting a polishing command to this. It is a basic feature.

Further, a plurality of conductor rolls for an electroplating line are usually installed, and when applying the above-mentioned configuration of the present invention to such a configuration, the conductor rolls have different diameters and Each of the rolls is provided with the above polishing jig, each pitch of the conductor roll is registered in the control device, and when the detected flaw has periodicity, which conductor roll is selected based on the flaw pitch. It is advisable that the control device decides whether or not this is the case, and based on this decision, the control device is set so as to output a movement and polishing command to a predetermined polishing jig.

[0009]

With the above construction, when the surface of the metal band is observed with a surface defect meter and a flaw is found, the controller moves the polishing jig to a specific portion of the conductor roll where polishing is required and concentrates only on that portion. Since the conductor rolls are mechanically polished, the conductor rolls can be rapidly polished, and the number of defective products due to the flaws of the conductor roll property is reduced.

Further, in the case of a structure having a plurality of conductor rolls, by setting the latter structure, it is possible to immediately determine which of the plurality of conductor rolls needs to be polished. The surface can be polished by moving the polishing jig to the required position.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the apparatus of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic view showing a line structure of an electrogalvanizing line used in a conductor roll polishing apparatus according to an embodiment of the present invention. In the figure, 10a and 10b are strips 1
Payoff reel for rewinding, 11 for alkaline cleaning tank, 12 for pickling tank, 13 for electrogalvanizing tank with # 1 to # 15, 14 for chemical conversion processing tank, 15 for dryer, 16 for outgoing inspection table, 17 Indicate tension reels.

As shown in FIG. 2, each of the electrogalvanized baths 13 is stripped into the bath via dam rolls 20a to 20d.
1, the strips 1 in the tank are provided with anode electrodes 21a to 21d in parallel with the front and back of the strip 1, and conductor rolls 2a and 2b are installed on the inlet and outlet sides of the tank.

These conductor rolls 2a and 2b are # 1 to # 1.
The roll diameter is different in all of these through the # 15 electrogalvanizing tank 13, and the length of each roll is all.
It is 2130 mm. Further, as shown in FIG. 3, each conductor roll 2 slides along a guide rail 30 suspended in the roll length direction at a speed of 1 m / min,
It is equipped with a scotch-bright polishing jig 3 for polishing the surface of the roll.

Further, as shown in FIG. 4, eight optical surface defect gauges 4 each having a channel width of 250 mm are arranged on the one side of the strip 1 in the width direction (#
1 to # 8) (being provided on the back surface of the strip 1 as well, the conductor roll type flaw is usually projected to the back surface, and this projected portion is easier to detect). The surface defect meter 4 can detect flaw grades on the surface of the strip 1 in three stages (class A, grade B, grade C) and also can accurately detect flaw pitch errors of ± 1 mm.

Further, in this embodiment, each detection signal of the surface defect meter 4 is input, and a total of 30 conductor rolls 2 provided on the inlet side and the outlet side of the plating tanks # 1 to # 5 are provided. A control device (not shown) that outputs a movement command to a predetermined position in the width direction of the strip 1 and a polishing command is installed in each of the polishing jigs 3 provided. The roll flaw generation position in the width direction of the strip 1 (position specified in each block of 250 mm width) depends on which of the front and back surfaces and the flaw detection signal 4 of # 1 to # 8 is input to the control device. Is determined. Further, the defect grade detected by the surface defect meter 4 is simultaneously input to the control device. Further, each pitch of all the conductor rolls 2 is registered in this control device, and when the flaw detection signal has periodicity, it is possible to determine which conductor roll 2 is the one based on the flaw pitch. It is like this. Therefore, in the control device, in accordance with the input of the flaw detection signal by the surface defect meter 4, which conductor roll 2 has a flaw caused by adhesion of foreign matter, and which flaw in the strip width direction of the corresponding conductor roll 2 is flawed. It is possible to determine whether or not there is any occurrence, and how much the flaw is, and based on these determination results, the predetermined polishing jig 3 is moved and the required range is adjusted to the flaw grade. The roll surface can be polished by reciprocating.

Next, the operation of the apparatus of this embodiment having the above structure will be described.

First, there is a flaw on the surface of the strip 1, and
When the flaw detection signal has a periodicity when it is detected by the # 8 surface defect meter 4 and the detection signal is input to the control apparatus, the control apparatus determines the pitch as shown in FIG. Then, it is specified which conductor roll 2 has a flaw due to adhesion of foreign matter or the like. At the same time, the controller specifies the polishing range of the conductor roll 2 to be polished, depending on which of the blocks # 1 to # 8 the flaw detection signal 4 is input from. Polishing jig for identifying this polishing range 3
Movement starts from 65 mm + (signal generation head number of surface defect meter of # 1 to # 8-1) x 250 mm, and 65 mm + (# 1
~ Signal generation head number of # 8 surface defect meter) x 250 mm. Further, since the flaw detection signal of the surface defect meter that is input also includes the grade of the flaw, the control device corresponds to the flaw grade and, in the case of the class A, the polishing jig 3 within the above polishing range. It is controlled to make 5 reciprocations, 10 reciprocations for the B class, and 15 reciprocations for the C class.

When the control device detects the periodic flaws, it issues a warning to the lineman with a buzzer, a lamp, or the like, so that the lineman receiving the warning will not hinder the product quality. It is recommended to reduce the line speed with, not to return to the original line speed until the required polishing work is completed, and to minimize the occurrence of defective products.

With the introduction of the apparatus configuration of the present embodiment as described above, in this electric zinc plating line, as shown in FIG. 6, the amount of the defective products due to the conductor roll-induced flaws is 0.5%, which is the state before the introduction. In comparison, it has decreased to about half.

[0021]

According to the conductor roll polishing apparatus of the present invention described in detail above, the occurrence of a conductor roll-induced flaw is detected at an early stage, and at the same time as the discovery, the identification of the conductor roll in which the flaw is generated is applicable. Since the flaw location of the conductor roll is automatically identified, it means that polishing is performed within the minimum necessary range, and not only the polishing work is automated, but also that work is performed quickly. As a result, it is possible to suppress the generation of out-of-grade products and improve the product yield.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an electric zinc plating line to which an embodiment of the present invention is applied.

FIG. 2 is an explanatory diagram showing a configuration of an electric plating tank of the above line.

FIG. 3 is a perspective view showing an installation situation of a polishing jig provided on a conductor roll.

FIG. 4 is a perspective view showing an installation situation of a surface defect meter.

FIG. 5 is a flowchart showing a procedure of determination and control by the control device.

FIG. 6 is a graph showing the difference in the amount of downgrade due to a conductor roll-induced flaw before and after the introduction of the apparatus of this embodiment.

FIG. 7 is an explanatory diagram showing a conventional configuration of an electric plating tank.

FIG. 8 is a perspective view showing an installation situation of a polishing jig.

[Explanation of symbols]

 1 Strip 2a, 2b Conductor roll 3 Polishing jig 4 Surface defect meter 10a, 10b Payoff reel 11 Alkaline cleaning tank 12 Pickling tank 13 Electroplating tank 14 Chemical conversion treatment tank 15 Dryer 16 Inspection table 17 Tension reel 20a ~ 20d Dam roll 21a ~ 21d electrode

Claims (2)

[Claims] 1. A polishing jig that moves in the length direction of a conductor roll provided in an electroplating line of a metal strip to polish the surface thereof, and a plurality of polishing jigs behind the conductor roll in the width direction of the metal strip. A surface defect meter that is installed in a divided state and detects flaws on the surface of the metal strip, and the detection signals of these surface defect meters are input, and the position corresponds to the position in the width direction of the metal strip having the detected flaw. A conductor roll polishing apparatus for a metal strip electroplating line, comprising a control device for moving the polishing jig to a surface portion of a conductor roll and outputting a polishing command to the polishing jig. 2. The conductor roll polishing apparatus for an electroplating line according to claim 1, wherein when a plurality of the conductor rolls are used, each of the rolls has a different diameter, and the conductors have different diameters. If the polishing jig is provided for each roll, each pitch of the conductor roll is registered in the control device, and if the detected flaw has periodicity, which conductor roll is based on the flaw pitch 2. The electricity of the metal strip according to claim 1, wherein the control device determines whether or not it is, and based on the determination, the control device outputs a movement and polishing command to a predetermined polishing jig. Conductor roll polishing equipment for plating line.