KR20010094256A - Detecting device for removing oil badness of strip surface passing alkali tank - Google Patents

Abstract

PURPOSE: An apparatus for detecting degreasing defects of the surface of a strip passing through an alkali tank is provided to cope with the degreasing defects by occasionally measuring a pollution at an arbitrary exact position along the width direction of a steel sheet which is proceeded for galvanization of the cold rolling process, thereby early checking degreasing defects. CONSTITUTION: The apparatus comprises a body(20) fixed at both sides of an exit of an alkali tank; a degreasing detection part(40) having a driving means of a pneumatic cylinder(42), a degreasing roller(60) which is a detecting means that is contacted with the surface of a strip by being rotated by the pneumatic cylinder, and a sensor contacting with a controller in which a standard value is set so as to judge whether the surface of the strip is poorly washed or not by measuring an alkali concentration stuck to the degreasing roller, wherein the degreasing detection part is installed on the upper surface of the body so that a concentration of alkali distributed on the surface of the strip to be washed is selectively detected at an arbitrary position; and an edge sensing part which is equipped with guiding stands(90a,90b,90c) that are adjacently installed in front of the degreasing detection part, transferable in a width direction of the strip by an electric motor(80) and have an edge sensor(88) sensing the edge of the strip, and contacts with the controller so that the degreasing detection part is exactly guided to a position detecting the degreasing defects by detecting the edge of the strip proceeded.

Description

DETECTING DEVICE FOR REMOVING OIL BADNESS OF STRIP SURFACE PASSING ALKALI TANK}

The present invention relates to an apparatus for detecting a degreasing defect on a strip surface passed through an alkali tank, and more specifically, when cleaning the surface of a steel sheet prior to a plating line using alkali, it is possible to directly inspect the cleaning state of the steel sheet surface periodically, stably and automatically. The present invention relates to an apparatus for detecting a deficiency of a strip surface through an alkali tank which can be improved in quality.

In general, hot rolled steel sheet is processed again through cold rolling process, and after the scale is removed, foreign matters such as scale and oil remaining on the surface of the steel sheet are completely removed through an alkali tank, which is a preliminary work for plating, and then side trimming ( SIDE TRIMMING).

Subsequently, it is preheated to enable the plating operation in the heating furnace, and then plated appropriately while passing through the plating bath, and after the shape correction, the final demand is wound or sheared into the specifications ordered to produce the product.

During the preliminary treatment for plating, foreign substances such as scale and oil remaining on the surface of the steel sheet must be completely removed while passing through the alkali tank, but otherwise, unplating or plating failure will occur.

Such degreasing (poor oil removal) of the surface of the hot-rolled steel sheet, that is, the alkali concentration distributed on the surface of the hot-rolled steel sheet discharged through the alkali tank should be properly managed to detect the degreasing defect in advance. Even if it is difficult and inspected, it is only a part of it, and systematic data management is not carried out, resulting in poor plating or unplated phenomenon, resulting in lowered error rate and cost loss.

The present invention has been made in view of the above-described problems of the prior art, and has been devised to solve this problem. The degree of contamination at any precise point along the width direction of the steel sheet for galvanizing of the cold rolling process (degreasing ratio = It is an object of the present invention to provide an apparatus for detecting the deficiency of strip surface through an alkali tank, which enables the measurement of alkali concentration at any time, so that it is possible to check and cope with the deficiency at an early stage.

1 is a partial perspective view showing the installation state of the degreasing failure detection apparatus according to the present invention,

Figure 2 is a perspective view of the main part of the degreasing failure detection apparatus according to the invention.

Explanation of symbols on the main parts of the drawings

10: alkaline tank, 20: main body,

40: degreasing detection unit, 42: pneumatic cylinder,

44: guide, 46: distance meter,

48,82: electric motor, 50: fixed plate,

52: side bar, 54: support bar,

58: detector, 60: degreasing roller,

84: guide bar, 86: guide bar,

88: edge detector, 90a, 90b, 90c: guide stand.

The object of the present invention described above is fixed to both sides of the outlet of the alkaline tank; Installed on the upper surface of the main body is rotated by the pneumatic cylinder and the pneumatic cylinder driving means to selectively detect the alkali concentration distributed on the surface of the strip to be washed while passing through the alkali tank at any point of the strip A degreasing detector having a degreasing roller, which is a detection means capable of interviewing a surface, and a detector communicating with a controller having a reference value set to determine whether or not the surface of the strip is washed by measuring alkali concentration on the degreasing roller; It is installed in front of the stripping detection unit, and is provided in front of the stripping unit, which is movable in the width direction of the strip by an electric motor, and has an induction stand having an edge detector for detecting the edge of the strip. It is achieved by including an edge sensing unit communicating with the controller so as to accurately guide to the position to be detected.

Hereinafter, a preferred embodiment according to the present invention will be described in more detail on the basis of the accompanying drawings.

1 is an external perspective view showing an installation state of a degreasing detection device according to the present invention, Figure 2 is an enlarged perspective view of only a degreasing detection device according to the present invention.

As shown in the figure, the detection apparatus of the present invention, the main body 20 installed on both sides of the outlet 12 front of the alkaline tank 10, the degreasing detection unit 40 and the edge detection fixed to the main body 20 The unit 80 and the controller 99 which is electrically connected and controlled.

Degreasing detection unit 40 is installed on the upper side of the running strip (S) and optionally washed through the surface state of the strip (S), that is, the alkaline tank 10, and discharged through the outlet (12). The surface alkali concentration at the time of measurement can be measured to check whether there is a deficiency.

The degreasing detection unit 40 has a pair of guides 44 fixed to the surfaces of the main body 20 facing each other.

One end of the guide 44 is rotatably fixed to the main body 20 by a bearing block, and a pair of non-rotating fixing plates 50 are provided at a distance from each other.

One of the guides 44 is connected to the pneumatic cylinder 42, the guide 44 is rotatable by an angle by the pneumatic cylinder 42 and at the same time fixed plate 50 fixed to the guide 44 It is possible to rotate a certain angle.

The fixed plate 50 is a rectangular member, and the electric motor 48 is installed on the outer wall of any one of the fixed plates 50.

The electric motor 48 is provided with a distance measuring unit 46 for measuring the distance by detecting and converting the rotational speed of the motor.

The rotating shaft of the electric motor 48 is provided with a horizontal rod 52 disposed through the fixing plate 50.

A screw thread is formed in the lateral bar 52, and a fixing table 56 supporting the degreasing roller 60 is engaged.

Fixing table 56 is formed in a hoe shape and a pair is provided to support both sides of the degreasing roller (60).

Degreasing roller 60 is a member for detecting the alkali concentration on the strip (S) surface in contact with the surface of the strip (S), the rotation axis is rotatably fixed to the upper end of the fixing table (56).

A guide rod 66 fixed to the fixing plate 50 is installed at the lower end of the fixing table 56.

The guide rod 66 allows the fraud holder 56 to be smoothly guided without being moved when the holder 56 supporting the degreasing roller 60 is moved along the side bar 52.

The touch bars 64a and 64b are fixed to both side surfaces of the fixing base 56.

The support bar 54 is installed on the fixed plate 50 in two rows in parallel with the horizontal bar 52 at a predetermined distance, and a rectangular detector 58 is installed at the central portion in the longitudinal direction of the support bar 54. .

The detector 58 may be various means, but preferably, such as a camera, photographed the surface of the degreasing roller 60 and then communicating with the controller 99 to detect the color set in the controller 99 and the detected degreasing roller. The degree of surface contamination of the strip S detected by the degreasing roller 60 may be compared by comparing the colors of the degreasing roller 60, and in the present invention, the detector 58 and the degreasing roller 60 may be contacted with each other to perform degreasing. It is to be able to sense the alkali concentration of the surface of the strip (S) buried in the surface of the roller (60).

In addition, a pair of detectors 62a and 62b are installed on the inner surface of the fixing plate 50 so as to be in parallel with the touch bars 64a and 64b installed on the fixing table 56.

On the other hand, the support plate 22 is fixed to the upper surface of the main body 20, the electric motor 82 is fixed to the upper surface of one side of the support plate 22 is connected to the rotary shaft of the electric motor 82 and the longitudinal direction Thus, the threaded guide bar 86 is rotatably installed by a bearing block or the like.

A guide rod 84 is disposed parallel to and adjacent to the guide bar 86, and no thread is formed in the guide rod 84.

Three guide bars 90a, 90b and 90c are inserted into the guide bar 86 and the guide bar 84, and among these guide bars 90a, 90b and 90c, the guide bar 86 is divided into two parts. Guide guide (90a) is installed at the point is not formed without a thread is fixed to flow, both guide bars (90b, 90c) guided along the guide bar 86 and guide rods 84 on both sides of the center Is installed.

A pair of sensing units 92 protrude from both side ends of the center guide 90a so as to face each other, and a touch bar 94 corresponding to the sensing unit 92 at one side of both guides 90b and 90b. ) And an edge detector 80 orthogonal to the touch bar 94 is provided.

The alkali tank degreasing detection apparatus of the present invention having such a configuration is operated as follows.

After washing the surface of the strip (S) proceeding from the alkaline tank 10 to the alkaline solution, and when the strip (S) is discharged through the outlet 12 as necessary to operate the detection device from time to time to the surface of the strip (S) Will be checked for degreasing.

For example, when an instruction is given to check the strip surface alkali concentration at a point of 20 mm from the left edge of the strip to the center side, the strip S is first passed through the edge detector 80 to accurately detect the alkali concentration at the point to be measured. Edge position is detected.

That is, the length of the guide bar 86 has already been calculated, and the initial positions of the guide bars 90b and 90c are located at the outermost and opposite ends of the guide bar 86, so that the driving of the electric motor 82 is performed. The moving distances of the guide bars 90b and 90c formed by the thread can be calculated by the rotational speed of the electric motor 82, and the two guide bars 90b and 90c are always moved by the same distance.

When the guide bars 90b and 90c are moved toward the guide bar 90a in the center and the edge detector 88 comes into contact with both ends of the strip S, the electric motor 82 is turned off and at the same time the guide bars 90b and 90c. The edge position of the strip S is calculated by the automatic calculation of the moving distance.

The touch bar 94 attached to the guide bars 90b and 90c is not operated so that the guide bars 90b and 90c on both sides do not contact the guide bar 90a of the center by contact with the detector 92. The electric motor 82 is controlled to stop so as to stop.

The edge detector 88 is engaged with the continuous progress of the strip S to continuously detect the change of the edge position.

Subsequently, the electric motor 48 is driven according to the instruction of the controller 99 to move the degreasing roller 60 to the left end, and then the degreasing roller 60 is connected with the distance measuring device 46 to the strip S. It will be moved exactly 20mm from the left end.

When the movement is completed, the pneumatic cylinder 42 is operated to rotate the guide 44 at an angle, and by rotation the degreasing roller 60 is brought into contact with the surface of the strip S and comes into contact with the strip S. Components remaining on the surface are buried in the degreasing roller (60).

Then, the pneumatic cylinder 42 is returned to its original position and the electric motor 48 is driven to move the degreasing roller 60 to the center portion where the detector 58 is installed.

When the degreasing roller 60 and the detector 58 come into contact with each other, the detector 58 measures the alkali concentration detected by the degreasing roller 60, and transmits the detected alkali concentration to the controller 99, and the controller 99 sets a preset alkali. The concentration of the strip (S) is compared with the distribution of the concentration of the surface of the degreasing or not, and the beep or display the results to the operator.

The contamination status is divided into 100 parts of Ph 14 based on Ph 7 when the concentration of alkali is expressed as a percentage, and when the detected alkali concentration is less than 50%, it is degreasing and when it is 50% or more, it is detected as an alkali tank. Recheck the cleaning process or replace the alkaline solution so that the pickling process can be performed again.

As described in detail above, the degreasing defect detection device of the strip surface passed through the alkali tank according to the present invention automatically checks the alkali concentration of the strip surface which is difficult to detect by the operator to check the state of removing foreign substances such as scale and oil. It is possible to prevent the unplating phenomenon and the plating defect occurring in the subsequent plating process, and to improve the plating quality of the product accordingly.

Claims (3)

A main body 20 fixed to both sides of the outlet 12 of the alkali tank 10; Pneumatic cylinder 42 is installed on the upper surface of the main body 20 as a drive means to selectively detect the alkali concentration distributed on the surface of the strip (S) to be washed while passing through the alkaline tank 10 at any point ) And the alkali concentration on the degreasing roller 60 and the degreasing roller 60 which are rotated by the pneumatic cylinder 42 to be interviewed with the surface of the strip S, and thus the surface of the strip S. A degreasing detection unit 40 having a detector 58 that communicates with the controller 99 having a reference value set to determine whether the washing is poor or not; Induction stand adjacent to the degreasing detection unit 40 and installed in front of the strip detection unit 40 and movable in the width direction of the strip S by the electric motor 82 and having an edge detector 88 for detecting the edge of the strip S. Edge detection unit having 90a, 90b, 90c and communicating with the controller 99 so as to detect the edge of the advancing strip S and guide the stripping detection unit 40 to the desired position accurately. Alkaline tank degreasing detection device, characterized in that it comprises a 80). The degreasing detection unit 40 is rotatably fixed to both sides of the main body 20 by one end thereof, such as a bearing block, and the other end of the degreasing detection unit 40 is not rotatable to the pair of fixing plates 50, respectively. A pair of fixed guides 44; A pneumatic cylinder 42 fixed to any one of the guides 44 and installed to rotate the fixed plate 50 at an angle; An electric motor 48 having a distance measurer 46 fixed to one outer surface of the fixed plate 50; A horizontal rod (52) fixed to the rotating shaft of the electric motor (48) and penetrating the fixing plate (50) so as to be rotatably fixed to the other fixing plate (50), the thread being formed along its length direction; A holding table 56 movably engaged along the transverse bar 52 and having a degreasing roller 60; Touch bars 64a, which are fixed to both outer surfaces of the fixing table 56 and installed to be in direct contact with the detectors 62a and 62b formed on the inner surface of the fixing plate 50 to stop the driving of the electric motor 48 upon contact. 64b); The controller is installed to be in contact with the degreasing roller 60 supported by the holder 56 in the longitudinal center portion of the support bar 54 fixed on the fixing plate 50 in parallel with the horizontal bar 52. Alkali tank degreasing detection device, characterized in that it comprises a detector (58) provided to be able to communicate with (99). According to claim 1, wherein the edge detecting portion 80 comprises a pair of support plates (22) fixed to the upper surface of each of the main body (20); An electric motor 82 installed on the support plate 22; An induction bar 86 connected to the rotational shaft of the electric motor 82 and rotatably fixed on the support plate 22 by a bearing block, and having a thread formed in the remaining portion thereof except for a center in the longitudinal direction; A guide rod 84 disposed parallel to the guide bar 86 and fixed to the support plate 22 without rotation; The edge detector 88 is inserted into the guide bar 86 and the guide rod 84 and is movable along the same distance with each other, and at one end thereof is in contact with the widthwise edge of the strip S to detect the edge position. Alkaline tank degreasing detection device, characterized in that it comprises a pair of guide bars (90b, 90c).