Test method for researching and improving uniformity of oriented silicon steel coating

Abstract

The invention discloses a test method for researching and improving the uniformity of an oriented silicon steel coating, and the method comprises the following steps: horizontally placing an acrylic plate, completely fixing the acrylic plate, placing a camera and a laser below the acrylic plate, and placing a coating roller engraved with a micro notch groove above the acrylic plate; the coating roller is controlled to lift by controlling the lifter; starting laser and a camera; and the camera observes the contact width between each notch groove and the acrylic plate through the acrylic plate and analyzes the contact width. The more consistent the contact width of each notch groove is, the higher the coating uniformity is. According to the method, the optimal coating scheme can be designed, the coating uniformity is improved, and the production quality and efficiency of the oriented silicon steel are improved.

Description

Technical Field

[0001] The invention relates to the technical field of iron and steel metallurgy, and in particular to an experimental method for studying and improving the uniformity of oriented silicon steel coating. Background Art

[0002] At present, oriented silicon steel manufacturers all use a two-roller extrusion coating process with grooves to apply Mgo suspension. The two-roller extrusion coating machine adjusts the volume of the grooves after double-roll extrusion by adjusting the lifting height of the lower roller, thereby controlling the coating film thickness. Figure 1 As shown, when working, the upper coating roller 2-1 is a fixed free roller, and the lower coating roller 2-2 is a free roller that can be lifted and lowered. Both the upper and lower coating rollers are rubber rollers with grooves. The grooves are made by a rubber roller grinder to carve continuous spiral patterns along the circumferential direction. Figure 2 As shown. Nozzle 3 sprays the Mgo suspension on the surface of the steel strip 1, and the steel strip 1 is clamped between the upper roller and the lower roller and moves uniformly from left to right. Under a certain pressing force, the steel strip 1 drives the coating roller 2-1 / 2 to rotate through friction, and the coating roller 2-1 / 2 rotates and squeezes to evenly apply the coating liquid to the surface of the steel strip 1.

[0003] At present, two-roller coating machines generally have the problem of poor axial coating uniformity. To improve coating uniformity, it is necessary to analyze the stress of the coating roller and consider multiple influencing factors such as rubber material, rubber layer thickness, coating roller compression, strip width, etc.

[0004] In order to improve the adaptability, efficiency and economy of coating research, low-cost experiments are usually used for research and then promoted. The results of low-cost experiments can provide important reference value for practical engineering problems. Designing an effective test method is crucial to analyzing and improving coating uniformity. Considering the impact of different influencing factors on coating uniformity, it is necessary to carry out experimental research, but this related experiment has not been able to better observe the coating uniformity, resulting in the coating uniformity of the designed coating scheme is still low. How to develop an experimental method to study and improve the uniformity of oriented silicon steel coating to improve coating uniformity has become an urgent problem to be solved. Summary of the invention

[0005] The purpose of the present invention is to provide an experimental method for studying and improving the uniformity of oriented silicon steel coating. By using a machine vision method, the contact width between the groove and the acrylic plate is observed. The more consistent the contact width of each groove is, the higher the coating uniformity is. By comparing the coating uniformity of different influencing factors, the optimal coating scheme is selected to improve the coating uniformity. The present invention improves the adaptability, efficiency and economy of coating roller coating research work, which is conducive to improving the production quality and efficiency of oriented silicon steel.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A test system for improving the uniformity of oriented silicon steel coating, the test system comprises an elevator, a coating roller is connected below the elevator, and an acrylic plate, the lower surface of the coating roller is in contact with the upper surface of the acrylic plate, and a camera and a laser transmitter are arranged below the acrylic plate.

[0008] Furthermore, the coating roller includes a roller, a roller neck and a rubber layer. The roller neck is composed of an axle end and an axle head, the roller is fixed between the two axle heads, the rubber layer is sleeved on the outside of the roller and the axle end, the thickness of the rubber layer is 15 to 25 mm, and the surface of the rubber layer 9 is engraved with micro-trapezoidal grooves.

[0009] Furthermore, the outer diameter A of the coating roller is 80-120 mm, the outer diameter B of the roller is 60-100 mm, the outer diameter C of the journal is 15-25 mm, the length E of the coating roller is 300-400 mm, the length F of the rubber layer is 240-300 mm, the inner diameter D of the roller is 55-95 mm, and the length G of the roller is 230-290 mm.

[0010] Furthermore, the rubber hardness of the rubber layer is 53-59 Shore A. The micro-trapezoidal groove has a bottom width H of 0.3-0.6 mm, a top width I of 0.25-0.5 mm, a groove angle J of 60°, a groove spacing K of 0.97-2.25 mm, and a groove depth L of 0.38-1 mm.

[0011] Furthermore, the acrylic plate has a width of 100 to 300 mm, a length of 300 to 600 mm, and a thickness of 4 to 10 mm.

[0012] Furthermore, the lens of the camera is vertically upward, and the laser emitter is located on one side of the camera to illuminate the shooting area of ​​the camera 7.

[0013] Furthermore, the camera is a line array camera, and the sensor pixel on the camera is greater than 12k.

[0014] A test method for improving the uniformity of oriented silicon steel coating, the method comprising the following steps:

[0015] S1: Observe the effect of compaction on the uniformity of silicon steel coating;

[0016] S2: Observe the effect of strip width on silicon steel coating uniformity;

[0017] S3: Observe the effect of rubber layer thickness on silicon steel coating uniformity;

[0018] S4: Observe the effect of rubber hardness on the uniformity of silicon steel coating;

[0019] S5: Based on the test results of S1-S4, design the optimal coating scheme to improve the production quality and efficiency of oriented silicon steel.

[0020] Furthermore, step S1 is specifically as follows:

[0021] S11: Set the width of the acrylic plate to 180 mm, the thickness of the rubber layer to 20 mm, and the hardness of the rubber layer to 56 Shore A. Control the lifting and lowering of the coating roller by the elevator to adjust the pressing amount between the coating roller and the acrylic plate.

[0022] S12: Turn on the laser transmitter and camera;

[0023] S13: When the compression amount is adjusted to 1, 2, 3, and 4 mm, the camera is used to collect images respectively to observe the contact width between each groove and the acrylic plate in the image. The more consistent the contact width of each groove is, the higher the coating uniformity is.

[0024] If the consistency of the contact width of each groove in the image is higher when the compression amount is adjusted to 3 mm than when the compression amount is set to 1 mm, 2 mm, and 4 mm, then the compression amount is set to 3 mm as the optimal compression amount.

[0025] Furthermore, step S2 is specifically as follows:

[0026] S21: Set the compression amount to 3mm, the rubber layer thickness to 20mm, the rubber layer hardness to 56Shore A, and adjust the width of the acrylic plate;

[0027] S22: Turn on the laser transmitter and camera;

[0028] S23: Acrylic plates with widths of 150, 180, and 210 mm are used, and images are collected with cameras respectively. The contact width between each groove and the acrylic plate in the image is observed. The more consistent the contact width of each groove is, the higher the coating uniformity is.

[0029] If the width of the acrylic plate is adjusted to 180 mm, the consistency of the contact width of each groove in the image is higher than when the width of the acrylic plate is 150 mm and 210 mm, then the width of the acrylic plate of 180 mm is the optimal coating plate width.

[0030] Furthermore, step S3 is specifically as follows:

[0031] S31: Set the width of the acrylic plate to 180mm, the compression amount to 3mm, the hardness of the rubber layer to 56Shore A, and adjust the rubber lining thickness of the roller and the shaft end surface;

[0032] S32: Turn on the laser transmitter and camera;

[0033] S33: Coating rollers with rubber layer thicknesses of 15, 20, and 25 mm are manufactured respectively, and images are collected by a camera to observe the contact width between each groove and the acrylic plate in the image. The more consistent the contact width of each groove is, the higher the coating uniformity is.

[0034] If the rubber layer thickness is adjusted to 20 mm, the consistency of the contact width of each groove in the image is higher than when the rubber layer thickness is 15 mm and 25 mm, then the rubber layer thickness of 20 mm is the optimal rubber lining thickness.

[0035] Further, step S4 is specifically as follows:

[0036] S41: setting the width of the acrylic plate to 180 mm, the thickness of the rubber layer to 20 mm, and the compression amount to 3 mm, preparing rubbers of different hardness, and then lining the rubbers of different hardness on the surfaces of the roller and the shaft end;

[0037] S42: Turn on the laser transmitter 8 and the camera 7;

[0038] S43: Coating rollers with hardness of 53, 56, and 59 Shore A are respectively manufactured, and images are collected by a camera to observe the contact width between each groove and the acrylic plate in the image. The more consistent the contact width of each groove is, the higher the coating uniformity is.

[0039] If the rubber hardness is adjusted to 56Shore A, the consistency of the contact width of each groove in the image is higher than when the rubber hardness is 53Shore A and 59Shore A, then the rubber hardness of 56Shore A is the optimal lining rubber hardness.

[0040] The present invention has the following effects:

[0041] In view of the problem of poor coating uniformity produced by the two-roll extrusion coating machine, the coating uniformity can be explored by conducting experiments. The present invention can better observe the coating uniformity, which is of great significance for the optimization design of the coating system. In actual working conditions, the coating roller compression, strip steel width, rubber layer thickness and rubber hardness are all important influencing factors that produce poor coating uniformity. The influence on coating uniformity can be studied by changing the compression amount at both ends of the coating roller, acrylic plate width, rubber layer thickness and rubber layer hardness in the experiment. The contact width between each groove and the acrylic plate can be observed by a camera. The more consistent the contact width of each groove, the higher the coating uniformity. The observation method of this experiment is conducive to analyzing and designing the optimal coating scheme, improving the adaptability, efficiency and economy of coating research work, and improving the production quality and efficiency of oriented silicon steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 Schematic diagram of coating with two-roll extrusion coating machine;

[0043] Figure 2 Overall three-dimensional image of the coating roller;

[0044] Figure 3 Three-dimensional image of grooves on the coating roller surface;

[0045] Figure 4 Schematic diagram of the test method;

[0046] Figure 5 Schematic diagram of the test coating roller;

[0047] Figure 6 Schematic diagram of grooves cut on the surface of the test coating roller;

[0048] Figure 7 Schematic diagram of the test roller core;

[0049] Figure 8 Schematic diagram of the test roll neck;

[0050] Fig. 9 Schematic diagram of the test roller. DETAILED DESCRIPTION

[0051] In order to make the purpose and technology of the present invention clearer, the technical scheme of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. In the following description, the description of the known structure and technology is omitted to avoid confusion with the concept of the present invention.

[0052] A test system for improving the uniformity of oriented silicon steel coating, the test system includes a lift 4, a coating roller 5 is connected below the lift 4, and an acrylic plate 6, the lower surface of the coating roller 5 is in contact with the upper surface of the acrylic plate 6, and a camera 7 and a laser transmitter 8 are arranged below the acrylic plate 6.

[0053] like Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the coating roller 5 comprises a roller 10, a roller neck 11 and a rubber layer 9. The roller neck 11 is composed of an axial end 13 and an axial head 12, the roller 10 is fixed between the two axial heads 12, the rubber layer 9 is sleeved on the outer sides of the roller 10 and the axial end 13, the thickness of the rubber layer 9 is 15 to 25 mm, and the surface of the rubber layer 9 is engraved with micro-trapezoidal grooves.

[0054] The outer diameter A of the coating roller 5 is 80-120 mm, the outer diameter B of the roller 10 is 60-100 mm, the outer diameter C of the journal 11 is 15-25 mm, the length E of the coating roller 5 is 300-400 mm, the length F of the rubber layer is 240-300 mm, the inner diameter D of the roller 10 is 55-95 mm, and the length G of the roller 10 is 230-290 mm.

[0055] The rubber hardness of the rubber layer 9 is 53-59 Shore A. The micro-trapezoidal groove has a bottom width H of 0.3-0.6 mm, a top width I of 0.25-0.5 mm, a groove angle J of 60°, a groove spacing K of 0.97-2.25 mm, and a groove depth L of 0.38-1 mm.

[0056] The acrylic plate 6 has a width of 100 to 300 mm, a length of 300 to 600 mm, and a thickness of 4 to 10 mm.

[0057] The lens of the camera 7 is vertically upward, and the laser emitter 8 is located on one side of the camera 7 to illuminate the shooting area of ​​the camera 7.

[0058] The camera 7 is a line array camera, and the sensor pixel on the camera 7 is greater than 12k.

[0059] like Figure 4 As shown, the present invention proposes a test method for improving the uniformity of oriented silicon steel coating, the method comprising the following steps:

[0060] S1: Observe the effect of compaction on the uniformity of silicon steel coating;

[0061] S11: Set the width of the acrylic plate 6 to 180 mm, the thickness of the rubber layer 9 to 20 mm, and the hardness of the rubber layer 9 to 56 Shore A, control the lifting and lowering of the coating roller 5 by the elevator 4, and adjust the pressing amount between the coating roller 5 and the acrylic plate 6;

[0062] S12: Turn on the laser transmitter 8 and the camera 7;

[0063] S13: When the compression amount is adjusted to 1, 2, 3, and 4 mm, the camera 7 is used to collect images respectively, and the contact width between each groove and the acrylic plate 6 in the image is observed. The more consistent the contact width of each groove is, the higher the coating uniformity is.

[0064] If the consistency of the contact width of each groove in the image is higher when the compression amount is adjusted to 3 mm than when the compression amount is set to 1 mm, 2 mm, and 4 mm, then the compression amount is set to 3 mm as the optimal compression amount.

[0065] S2: Observe the effect of strip width on silicon steel coating uniformity;

[0066] S21: Set the compression amount to 3 mm, the thickness of the rubber layer 9 to 20 mm, the hardness of the rubber layer 9 to 56 Shore A, and adjust the width of the acrylic plate 6;

[0067] S22: Turn on the laser transmitter 8 and the camera 7;

[0068] S23: Acrylic plates 6 with widths of 150, 180, and 210 mm are used, and images are collected using cameras 7 respectively, and the contact width between each groove and the acrylic plate 6 in the image is observed. The more consistent the contact width of each groove is, the higher the coating uniformity is.

[0069] If the width of the acrylic plate is adjusted to 180 mm, the consistency of the contact width of each groove in the image is higher than when the width of the acrylic plate is 150 mm and 210 mm, then the width of the acrylic plate of 180 mm is the optimal coating plate width.

[0070] S3: Observe the effect of rubber layer thickness on silicon steel coating uniformity;

[0071] S31: Set the width of the acrylic plate 6 to 180 mm, the compression amount to 3 mm, the hardness of the rubber layer 9 to 56 Shore A, and adjust the rubber lining thickness on the surface of the roller 10 and the shaft end 13;

[0072] S32: Turn on the laser transmitter 8 and the camera 7;

[0073] S33: Coating rollers 5 with rubber layer 9 thicknesses of 15, 20, and 25 mm are manufactured respectively, and images are collected by camera 7 to observe the contact width between each groove and the acrylic plate in the image. The more consistent the contact width of each groove is, the higher the coating uniformity is.

[0074] If the rubber layer thickness is adjusted to 20 mm, the consistency of the contact width of each groove in the image is higher than when the rubber layer thickness is 15 mm and 25 mm, then the rubber layer thickness of 20 mm is the optimal rubber lining thickness.

[0075] S4: Observe the effect of rubber hardness on the uniformity of silicon steel coating;

[0076] S41: setting the width of the acrylic plate 6 to 180 mm, the thickness of the rubber layer 9 to 20 mm, and the compression amount to 3 mm, preparing rubbers of different hardness, and then lining the surfaces of the roller 10 and the shaft end 13 with the rubbers of different hardness;

[0077] S42: Turn on the laser transmitter 8 and the camera 7;

[0078] S43: Coating rollers 5 with hardness of 53, 56, and 59 Shore A are manufactured respectively, and images are collected by a camera 7 to observe the contact width between each groove and the acrylic plate in the image. The more consistent the contact width of each groove is, the higher the coating uniformity is.

[0079] If the rubber hardness is adjusted to 56Shore A, the consistency of the contact width of each groove in the image is higher than when the rubber hardness is 53Shore A and 59Shore A, then the rubber hardness of 56Shore A is the optimal lining rubber hardness.

[0080] S5: Based on the test results of S1-S4, design the optimal coating scheme to improve the production quality and efficiency of oriented silicon steel.

[0081] The above is only an embodiment of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A test system for improving the uniformity of oriented silicon steel coating, characterized in that: The test system comprises an elevator (4), a coating roller (5) is connected below the elevator (4), and an acrylic plate (6), the lower surface of the coating roller (5) is in contact with the upper surface of the acrylic plate (6), and a camera (7) and a laser transmitter (8) are arranged below the acrylic plate (6).

2. The test system according to claim 1, characterized in that: The coating roller (5) comprises a roller (10), a roller neck (11) and a rubber layer (9); the roller neck (11) is composed of an axial end (13) and an axial head (12); the roller (10) is fixed between the two axial heads (12); the rubber layer (9) is sleeved on the outer sides of the roller (10) and the axial end (13); the thickness of the rubber layer (9) is 15 to 25 mm; and micro-trapezoidal grooves are engraved on the surface of the rubber layer (9).

3. The test system according to claim 2, characterized in that: The outer diameter A of the coating roller (5) is 80-120 mm, the outer diameter B of the roller (10) is 60-100 mm, the outer diameter C of the journal (11) is 15-25 mm, the length E of the coating roller (5) is 300-400 mm, the length F of the rubber layer is 240-300 mm, the inner diameter D of the roller (10) is 55-95 mm, and the length G of the roller (10) is 230-290 mm.

4. The test system according to claim 3, characterized in that: The rubber hardness of the rubber layer (9) is 53-59 Shore A, the micro-trapezoidal groove bottom width H is 0.3-0.6 mm, the groove top width I is 0.25-0.5 mm, the groove angle J is 60°, the groove spacing K is 0.97-2.25 mm, and the groove depth L is 0.38-1 mm.

5. The test system according to claim 4, characterized in that: The acrylic plate (6) has a width of 100 to 300 mm, a length of 300 to 600 mm, and a thickness of 4 to 10 mm.

6. The test system according to claim 5, characterized in that: The lens of the camera (7) is vertically upward, and the laser emitter (8) is located on one side of the camera (7) to illuminate the shooting area of ​​the camera (7).

7. The test system according to claim 6, characterized in that: The camera (7) is a line array camera, and the sensor pixel on the camera (7) is greater than 12k.

8. A test method for improving the uniformity of oriented silicon steel coating, the method is based on the test system according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1: Observe the effect of compaction on the uniformity of silicon steel coating; S2: Observe the effect of strip width on silicon steel coating uniformity; S3: Observe the effect of rubber layer thickness on silicon steel coating uniformity; S4: Observe the effect of rubber hardness on the uniformity of silicon steel coating; S5: Based on the test results of S1-S4, design the optimal coating scheme to improve the production quality and efficiency of oriented silicon steel.

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