JPS62180773A - Installation for applying coating material to steel strip - Google Patents

Abstract

PURPOSE:To permit the adjustment of the coated film thickness of a steel strip even if the steel strip is transversely cambered by continuously applying a coating material such as lubricating agent by an applicator to the surface of the steel strip subjected to shape leveling by a tension leveler. CONSTITUTION:The shape of the steel strip A is corrected by the tension leveler 10 consisting of leveling rolls 14A, 14B and a control device 16. The coating material such as lubricating agent is continuously coated on the surface of the steel strip A subjected to shape leveling by the tension leveler 10 in the applicator 12. As a result, the coated film thickness of the steel strip can be adjusted even if the steel strip is transversely cambered. The coated film thickness in the transverse direction of the steel strip is thus made uniform.

Description

[Detailed description of the invention] [Field of industrial use]

The present invention relates to equipment for applying a coating material to a copper strip, and in particular to IT equipment for applying a coating material to a single strip, which is suitable for use in a steel strip surface treatment line, particularly equipment for coating and baking a surface treatment agent. . [Conventional technology] In recent years, due to demands for safety, work efficiency, cost reduction, etc. in the automobile industry, steel plates have been manufactured with pre-treatment applied to the steel plates used. Lubricated steel sheets aimed at speeding up, speeding up, and reducing the weight of automobiles (Tetsuto-Vo166 (1980) 7, P150-155)
has been developed and put into practical use. Recently, especially in response to the lightening of car bodies, high-tensile steel plate E55k (] / vI is used for fixed rotation wheel discs.
dUltra high tension steel plate () came into use,
The number of plates exceeding 3.0 mm in thickness is increasing, and the coating thickness of the solid lubricant applied thereto is required to be 3 to 5 μm or more.・Plate thickness 3. C) Kudzu steel plates exceeding wm□ are generally produced at a lower manufacturing cost than cold-rolled steel plates, and for reasons such as the fact that conventional cold-open rolling mill equipment exceeds the specifications. , □ Hot-rolled descaled tm temporary, which is obtained by removing black scale (oxidation scale) from hot-rolled steel sheets, is used.・□Installation for manufacturing the above-mentioned descaling steel sheet (W) is generally a continuous pickling line (bi-pickling line), which unwinds and processes the steel strip.In such a line, The copper strip to be fed may be one that has been wound up using a hot pressure press or one that has been processed using a skin bath mill. Flatness, which indicates the shape, is commonly known as 0.
There is curvature in the board width direction such as curvature or crooked curvature, and this curvature Δh is about 3 to 6111. Therefore, the hot rolling strip is solid, Tt! In order to apply a thick coating of 3 to 5 μm or more, the coating equipment must be based on the assumption that this warpage will occur. However, conventional coating equipment is mainly used for cold-rolled steel sheets, such as color coating lines, and the coating thickness is only 1.
Since many of the coating materials are smaller than μm, there is a problem that there is no coating equipment suitable for steel strips that are warped in the sheet width direction. On the other hand, as equipment for applying coating agent to hot rolled steel strip,
For example, those shown in FIGS. 4 to 6 have been developed and put into practical use. The coating equipment shown in FIG. 4 sprays the coating agent P onto the upper and lower surfaces of the copper strip A by spraying the coating agent P from a sprayer 1 disposed above and below the pass line of the copper strip A. P is squeezed by upper and lower squeezing rolls (ringer rolls) 2. The coating equipment shown in FIG. 5 is an improved version of the coating equipment shown in FIG. is applied to the upper and lower surfaces of the steel strip A. According to this, the amount of the coating agent P applied can be controlled by the pickup roll 3. The coating equipment shown in FIG. 6 is a modification of the coating equipment shown in FIG. They are arranged at a predetermined distance from each other and shifted in position. In all of the conventional coating equipment shown in FIGS. 4 to 6, the coating agent P is applied while being squeezed by one roll of phosphorus such as the squeezing roll 2 and the coater roll 4. In particular, there must be no gap between the steel strip A and the Ringer roll, and they must be in close contact. This is because if it were not coated, the coating thickness on either the top or bottom surface of the steel strip A would be uneven. In addition, depending on the conventional coating equipment mentioned above, the coating agent P may be applied thickly or
Even if coating is attempted, there is a problem in that the coating thickness of the coating agent P cannot be controlled because the lower surface side is subjected to the sealing force to the steel strip and the pressing force F of the upper ringer roll and coater roll. In contrast to this, there is a coating equipment as shown in FIG. 7 that makes it possible to control the coating film thickness. This coating equipment is intended to separately coat the upper and lower surfaces of the steel strip A, and is an improved version of the coating equipment shown in FIG. That is, first, the pick-up roll 3A and the coater roll 4A4 are
While the backup roll 5 supports the steel strip A, the coater roll 4A applies the coating agent P to the upper surface of the steel strip A, and then applies the coating agent P to the upper surface of the steel strip A below the pass line. The arranged pick-up roll 3B and coater roll 4B apply the coating agent P to the lower surface of the steel strip, and then apply the applied coating agent P to the upper and lower surfaces of the copper strip A in the dryer zone 8T, 8
In addition, the coating rolls 4A and 4B are rotated in the direction opposite to the conveying direction of the copper strip △.
Δ, the coating agent P on 48th circumference is transferred to the copper strip A. Therefore, it becomes possible to transfer the coating agent P to the steel strip Δ at the downstream side of the contact point between the steel strip A and the caulk rolls 4A, 4B, and the coating agent on the circumference of the caulk rolls 4A, 4B becomes possible. By adjusting the thickness, it is possible to control the coating thickness.

[Problems that the invention attempts to solve]

However, in coating installation ii shown in Fig. 7, when inspecting the bottom surface of the copper strip, the coating ff
1P1 has been completed, so it is not possible to provide a backup roll 6 as shown by the broken line in the figure, and we have no choice but to install a support roll 7 in the pass line 11 of coater rule 4 (j direction) for lower surface coating. When a steel strip A with a warp Δh as shown in FIG. Therefore, there is a problem that it is impossible to coat the steel strip A with a uniform thickness in the width direction of the steel strip A. On the other hand, the unevenness of the coating film thickness on the copper strip A, which has poor flatness, As a solution to the problem, JP-A-51-1283
No. 38 proposes a method and apparatus for correcting the shape of a steel plate and applying a coating agent using magnetic force. However, in the coating method proposed above,
For thick steel plates such as hot-rolled steel plates, the suction saw must be made larger, which poses the problem of increasing the size of the electrical equipment. Another problem is that the steel plate and the coater roll are in close contact with each other, making it impossible to control the thickness of the coating film.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned conventional problems, and it is possible to control the coating film thickness of the steel strip even when the copper strip has warpage in the width direction. The purpose of the present invention is to provide equipment for applying a coating agent to a beach zone, which can make the coating thickness uniform.

[Means to solve the problem]

The present invention provides a tension leveler for correcting the shape of a copper strip;
The above object is achieved by including a coating device that continuously applies a coating agent such as a lubricant to the surface of the steel strip whose shape has been corrected by the tension leveler.

[Effect]

In the present invention, when continuously applying a coating agent such as f'l lubricant to the surface of a copper strip, a tension leveler is provided on the entrance side of the coating device. Therefore, by correcting the shape of the steel strip in the width direction using a tension leveler so that there is no warping, the steel strip is flattened in the width direction, thereby making it possible to uniformly apply the coating agent to the copper strip. be able to.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, this embodiment includes a tension leveler 10 that corrects the shape of the steel strip Δ, and a coating agent such as a lubricant that is continuously applied to the surface of the steel strip A whose shape has been corrected by the tension leveler 10. The coating device 12 is equipped with a coating device 12 for coating the coating material. The tension leveler 10 includes leveling rolls 14A, 14B, etc. for shape correction.
4A and 14B': A control device 16 for adjusting and controlling the roll push-in m is provided. In addition, the code|symbol C1 in a figure is the said leveling roll 14A. 14'B and the control device 16). Furthermore, on the entrance and exit sides of the tension leveler 10,
Entry side priddle opening 18, exit side priddle roll 20
are arranged, and the tension is applied to the steel strip A in the tension leveler 10 by the priddle rolls 18 and 20. □On the upstream side of the input side priddle roll 18, there is a steel strip A.
An entry side shape measuring device 22 is arranged to measure the shape of the plate in the width direction. Which □ entry side shape measuring device 22 is equipped with the tension leveler 100 system based on the entry side shape measurement data.
A control unit 24 is provided for controlling the control unit 16. This predictive correction control device 24 is linked to the entry side shape measuring device 22 and the tension leveler control equipment 16 via transmission paths C2, C, and 3. On the one upstream side of the coating device 12, that is, on the outlet side of the tension leveler 10, an outlet shape measuring device 26 for measuring the shape of the steel strip A in the width direction is disposed. The exit side shape measuring device 26 is provided with a warpage correction control device 28 that controls the control device 16 of the tension leveler 10 based on the exit side shape measurement data. This warp correction 1 system wj￥! The position 28 has the exit side shape a! 11
The tension leveler 4q is connected to the tension device 26 and the tension leveler 4q surface device 16 via a transmission path 04.05'. Further, a host computer 3σ is connected to the coating device 12 and the tensioning leveler control device 16 via transmission paths C6 and C7. This host computer 30 is used to set the coating thickness setting value of the coating material in the tension leveler control device 16 and the coating device 12. The tension leveler control device 16 and coating device 11ff12
is controlled based on the set value. Said exit side priddle roll 2o and exit ff! 11 and the shape measuring device 26, a dryer 32 is arranged. This dry r32 removes moisture adhering to the surface of the steel strip A and accelerates drying after application of the coating agent. Next, the operation of this embodiment will be explained. When the shape of the copper strip A in the board width direction is measured by the entry side shape measuring device 22, the measurement signal is sent to the prediction correction control device 24 via the transmission path C2. The shape control data processed by the predictive correction control device 24 is sent to the tension leveler control device rF via the transmission path C3.
416. The tension leveler control device 16 adjusts the rolling positions of the leveling rolls 14A, 14B based on the shape control data from the predictive correction control device 24 to correct warping of the steel strip A in the width direction. As a method for measuring the shape of the steel strip A in the width direction, a known shape measuring method is used. For example, the one proposed in Jimon Sho 60-82804 is used. In addition, regarding the correction of warpage in the width direction such as crooked warpage of steel strip A, please refer to the "Basic Theory of Strain Correction"("ProductionResearch").
(edited by the University of Tokyo, Vol. 25, No. 10, p. 34) and “Straightening of cold-rolled fft4 iR using a tension leveler” (Japanese Steel Tube Technical Journal No. 37.51, Fig. 6), the theory and practice of straightening have been proven. As is clear from the fact that
It is possible to correct it by controlling the tension leveler. In this way, the distortion of the copper strip A is corrected in advance.
It will be transported into the coating device 12. However, although the strain on the steel strip A is corrected by the input side shape measuring device 22 placed on the input side of the tension leveler 1o, it is not always the case that a completely corrected and flat strip is conveyed to the coating device 12. Therefore, the shape measuring device 26 installed on the entrance side of the coating device 12 measures the shape of the copper strip A in the sheet width direction, and based on this measurement data, the warpage correction control device 28 corrects and corrects the predictive control.・Perform feedback control to This makes it possible to eliminate residual strain in the width direction of the copper strip A due to accuracy errors in the predictive control.・In other words, the main causes of errors in the accuracy of the predictive control are:
Therefore, there are large tension fluctuations due to fluctuations in the processing speed of steel strip A, but there are also other factors such as greening of the shape due to roll wear of the exit side priddle roll 20, which cannot be corrected in the predictive control model. Therefore, feedback control is performed by the exit side shape measuring device 26 and the warp correction control device 28. According to this embodiment, the entry side shape measuring device placed on the entry side of the tension leveler 10? 2 and a predictive correction control device 24; and a shape measuring device disposed on the entrance side of the coating device 12. 6 and the warpage correction control device 28, the distortion in the width direction of the steel strip A is canceled and
．． Its flatness can be improved. According to the results of this example, we were able to eliminate the strain in the width direction of the copper strip △ and reduce the flatness to 0.2 mm or less, which resulted in a lubrication treatment! ! The coating thickness of the steel plate could be controlled to 3 to 5 μm. Note that the coating film thickness here does not mean the thickness of the coating agent applied by the coating device 12, but the thickness of the coating agent that is processed in the subsequent drying and cooling device (not shown) to reduce moisture in the coating agent. This is the thickness of the solidified coating agent after evaporation, for example, acrylic polymer type polymer i1! In the case of I lubricant (trade name Milbond), the relationship between the coating film thickness in the wet state during application and in the dry state after drying is the relationship shown by the solid line Q in FIG. Therefore, in order to apply the coating agent thickly by 3 to 5 μm (111 rg), the coating film thickness in the wet state should be 500 to 700 μm. Therefore, as described above, since the flatness of the copper strip A is 200 μm or less, it is possible to uniformly control the coating thickness in the width direction. In the above embodiment, the dryer 32 is disposed between the outlet priddle roll 20 and the outlet shape measuring device 26, but the present invention is not limited to this.
For example, the exit side priddle roll 20 and the exit side shape measurement:;
? 26 may be provided with a surface treatment (a) such as a pickling tank or a water washing tank. [Effects of the Invention] As explained above, according to the present invention, steel having warp in the width direction Even when the steel strip is a strip, it has the excellent effect of being able to uniformly apply the coating agent in the width direction of the steel strip. This provides the following secondary effects. (1) Im slip treatment I with uneven coating film thickness! I! The occurrence of defective steel sheets can be reduced.1. It is possible to improve the non-defective product rate and reduce costs. (2) Since the coating agent can be uniformly applied in the width direction of the plate, resources of coating agents such as lubricants can be saved. (3) A hot-rolled steel sheet whose flatness is inferior to a cold-rolled steel sheet enables stable production of lubricated steel sheets, and it is possible to reduce the weight and manufacturing cost of automobiles and the like using this lubricated steel sheet.

[Brief explanation of drawings]

Fig. 1 is a side view, including a partial block diagram, showing an embodiment of the equipment for applying lubricant to N-band according to the present invention, and Fig. 2 shows the wet state and dry state after lubricant application in the same embodiment. Figure 3 is a diagram showing the warping condition of the IN strip in the sheet width direction; Figures 4 to 7 are side views showing conventional steel strip coating equipment. It is a diagram. 10... Tension leveler, 12... Coating device, 14A, 14B... Leveling roll, 16... Control device, 18.20... Prydle roll, 22.26... Shape measuring device, 24 ... Prediction correction control device, 28 ... Warp correction control device, 30 ... Upper computer. Substitute Oshiiri Kei Matsuyama Ya Takashi Theory Figure 2 Figure 3 Figure 4 Figure 5? Figure 6 Figure 7 Procedural amendment April 24, 1986 ('・,゛・Mr. Michibe Uga, Commissioner of the Patent Office 8
1. Indication of the incident Patent Application No. 19666 filed in 1985 2. Name of the invention Equipment for coating coating agent on copper strips 4. Agent 160 Address 11 Yamagin, Nishi-Shinjuku-chome, Shinjuku-ku, Tokyo Bill 6, Claims section of the specification subject to amendment and Detailed Description of the Invention section of the specification. 7. Contents of amendment (1) The scope of claims is amended as shown in the attached sheet. (2) "Coating material" on page 1, line 12 and line 14 of the same page of Akira II has been changed to "coating agent J." The above claims: (1) Steel strip A method for copper strip comprising: a tension leveler for correcting the shape; and a coating device for continuously applying a coating agent such as a lubricant to the surface of the steel strip whose shape has been corrected by the tension leveler. Painted surface.

Claims (1)

[Claims] (1) It is characterized by being equipped with a tension leveler that corrects the shape of a steel strip, and a coating device that continuously applies a coating agent such as a lubricant to the surface of the steel strip whose shape has been corrected by the tension leveler. Equipment for applying coating materials to steel strips.