Coating roller system for improving uniformity of surface coating of oriented silicon steel

Abstract

The utility model discloses a coating roller system for improving the uniformity of a coating on the surface of oriented silicon steel, and relates to the technical field of ferrous metallurgy. Comprising an upper coating roller, a lower coating roller and a lifting device. The upper coating roller and the lower coating roller are the same in shape and size. The two roller necks and the roller are welded to form a cavity structure, and the surface of the roller is an arc-shaped body protruding outwards. And a rubber layer with the thickness of 20-25mm covers the surface of the roller. The rubber hardness of the upper coating roller and the rubber hardness of the lower coating roller are different, the surface of the rubber layer is provided with a miniature notch groove, the notch groove in the surface of the rubber layer is divided into a middle area and an end area, the size of the notch groove in the middle area is large, and the size of the notch groove in the end area is small. The service life of the coating roller is prolonged, and the coating uniformity of the coating roller on the surface of silicon steel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of iron and steel metallurgy, in particular to a coating roller for improving the uniformity of the surface coating of oriented silicon steel. Background Art

[0002] One of the characteristics of the strip two-roll extrusion coating machine is that the means of adjusting the coating thickness are limited. The coating thickness can only be controlled by adjusting the height of the lower roller to adjust the volume of the groove after the double-roll extrusion. 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, and the grooves are continuous spiral patterns carved by a rubber roller grinder along the circumferential direction. The nozzle 3 sprays the MgO suspension on the surface of the steel strip 1, and the steel strip is clamped between the upper roller and the lower roller and moves horizontally from left to right at a uniform speed. The movement of the steel strip drives the coating roller to rotate, and the coating liquid is evenly applied to the surface of the steel strip through the rotation and extrusion of the coating roller.

[0003] At present, silicon steel manufacturers use coating rollers with uniformly distributed grooves on the rubber surface and cylindrical rollers. The deflection of the middle part of the roller during extrusion is large, so the volume of the grooves in the middle and the ends is different. This leads to poor uniformity of the coating thickness of the strip along the width direction. Generally, the coating in the middle is thicker and the coating at the edge is thinner. After use, the grooves at both ends of the coating roller are more severely worn, while the grooves in the middle area are shallower. This phenomenon will bring a lot of disadvantages: color defects are prone to occur on the surface of the middle and edge of the strip; when the strip is curled, the coiling occupancy rate is low; the strip is prone to orientation indentation; during high-temperature annealing, the strip is prone to convex deformation; when unwinding, interlayer slippage, scraping and strip shape quality problems are prone to occur, resulting in a low yield of stretch annealing. Summary of the invention

[0004] The utility model aims to provide a silicon steel coating roller, which prolongs the service life of the coating roller and improves the uniformity of the coating surface through the roller shape design and groove design of the roller.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A coating roller system for improving the uniformity of the surface coating of oriented silicon steel comprises an upper coating roller, a lower coating roller and a lifting device, the strip steel is located between the upper coating roller and the lower coating roller, the upper coating roller and the lower coating roller have the same shape and size, and the lifting device can drive the lower coating roller to move up and down, so that the lower coating roller is close to or away from the upper coating roller.

[0007] Furthermore, the upper coating roller and the lower coating roller both include a roller having a certain curvature, being thick in the middle and thin at both ends, and two roller necks are welded at both ends of the roller. The surface of the roller is covered with a rubber layer with a thickness of 20 to 25 mm, and the surface of the rubber layer has micro grooves. The rubber layer is divided into two parts, a middle area and an end area, along the axis direction of the roller. The length of the middle area is 1 / 2 to 2 / 3 of the length of the roller, and the size of the middle micro groove is different from the size of the end micro groove.

[0008] Furthermore, the micro-grooves are trapezoidal, the micro-grooves in the middle area are larger in size, and the micro-grooves in the end areas are smaller in size, wherein the groove spacing H of the micro-grooves in the middle area is 0.97-1.32 mm, the groove angle β is 120°, the groove top width F is 0.35-0.43 mm, the groove bottom width E is 0.25-0.30 mm, and the groove depth G is

[0009] The groove spacing D of the micro-grooves in the end area is 0.69-0.87 mm, the groove angle α is 120°, the groove top width B is 0.22-0.34 mm, the groove bottom width A is 0.12-0.20 mm, and the groove depth C is 0.32-0.36 mm.

[0010] Furthermore, the hardness of the rubber layer on the surface of the upper coating roller and the lower coating roller is different. The hardness of the rubber of the upper coating roller is 2-3 Shore A lower than that of the lower coating roller. The hardness of the rubber of the upper coating roller is 54-56 Shore A, and the hardness of the rubber of the lower coating roller is 57-59 Shore A.

[0011] Compared with the prior art, the utility model has the following effects:

[0012] After the coating roller is squeezed, the support force of the middle rubber on the roller is lower than that on the end due to the larger size of the middle groove; and the roller has a certain arc shape, so the middle groove can be squeezed more fully after being pressed, so as to make the volume of the end and middle grooves consistent, effectively eliminating the phenomenon that the middle groove is larger and the end groove is smaller. After squeezing, improving the uniformity of the groove volume along the width direction of the strip can effectively improve the uniformity of coating. After being put into use, the wear distribution of the grooves is more uniform. The phenomenon of uneven wear of the end and middle grooves can be eliminated, effectively improving the service life of the coating roller. If the grooves are evenly stressed, the support force of the rubber layer on the roller is more evenly distributed, which can effectively reduce the stress concentration phenomenon at the connection position between the roller neck and the roller core. Considering that the lower coating roller is a pressure roller and the groove deformation is large, the rubber layer of the upper coating roller is designed to be slightly softer than the lower coating roller, which can ensure that the thickness of the surface coating of the upper and lower strips remains the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of coating a silicon steel coating roller;

[0014] Figure 2 This is a schematic diagram of the coating roller structure design;

[0015] Figure 3 It is a partial enlarged view of the coating roller structure;

[0016] Figure 4 Schematic diagram of the coating roller groove design;

[0017] Figure 5 This is a schematic diagram of the roller structure design;

[0018] Figure 6 Schematic diagram of roll neck structure design. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the utility model clearer, the following will be combined with the accompanying drawings of the embodiments of the utility model.

[0020] , the technical solution of the embodiment of the utility model is clearly and completely described. In the following description, the description of the well-known structure and technology is omitted to avoid confusion with the concept of the utility model.

[0021] like Figure 1 -

[0022] As shown in FIG5 , the utility model proposes a coating roller system for improving the uniformity of the surface coating of oriented silicon steel, comprising an upper coating roller, a lower coating roller and a lifting device 6, wherein the strip steel 1 is located between the upper coating roller and the lower coating roller, wherein the upper coating roller and the lower coating roller have the same shape and size, and the lifting device 6 can drive the lower coating roller to move up and down, thereby making the lower coating roller close to or away from the upper coating roller.

[0023] In the utility model, the upper coating roller and the lower coating roller both include a roller 5, the roller 5 has a certain curvature, is thick in the middle and thin at both ends, two roller necks 4 are welded at both ends of the roller 5, the surface of the roller 5 is covered with a rubber layer with a thickness of 20 to 25 mm, the surface of the rubber layer has micro grooves 7, the rubber layer is divided into two parts, a middle area and an end area, along the axis direction of the roller 5, the length of the middle area is 1 / 2 to 2 / 3 of the length of the roller 5, and the size of the middle micro groove is different from the size of the end micro groove.

[0024] The micro grooves are trapezoidal, with larger micro grooves in the middle area and smaller micro grooves in the end areas. The groove spacing H of the micro grooves in the middle area is 0.97-1.32 mm, the groove angle β is 120°, the groove top width F is 0.35-0.43 mm, the groove bottom width E is 0.25-0.30 mm, and the groove depth G is 0.

[0025] The groove spacing D of the micro-grooves in the end area is 0.69-0.87 mm, the groove angle α is 120°, the groove top width B is 0.22-0.34 mm, the groove bottom width A is 0.12-0.20 mm, and the groove depth C is

[0026] 0.32~0.36mm. After the coating roller is squeezed and deformed, the deformation of the groove along the width direction of the strip steel is relatively uniform. The utility model prolongs the service life of the coating roller and improves the coating uniformity of the coating roller on the silicon steel surface.

[0027] The hardness of the rubber layer on the surface of the upper coating roller and the lower coating roller is different. The rubber hardness of the upper coating roller is 2 to 3 Shore A lower than that of the lower coating roller. The hardness of the rubber of the upper coating roller is 54 to 56 Shore A, and the hardness of the rubber of the lower coating roller is 57 to 59 Shore A.

[0028] During coating operation, the lower coating roller is driven to rise by the lifting device 6, and the upper coating roller is pressed against the lower coating roller. The thickness of the silicon steel surface coating is controlled by controlling the pressure exerted by the lower coating roller on the upper coating roller.

[0029] After the coating roller is squeezed, the support force of the middle rubber on the roller is lower than that on the end due to the larger size of the middle groove; and the roller has a certain arc shape, so the middle groove can be squeezed more fully after being pressed, so as to make the volume of the end and middle grooves consistent, effectively eliminating the phenomenon that the middle groove is larger and the end groove is smaller. After squeezing, improving the uniformity of the groove volume along the width direction of the strip can effectively improve the uniformity of coating. After being put into use, the wear distribution of the grooves is more uniform. The phenomenon of uneven wear of the end and middle grooves can be eliminated, effectively improving the service life of the coating roller. If the grooves are evenly stressed, the support force of the rubber layer on the roller is more evenly distributed, which can effectively reduce the stress concentration phenomenon at the connection position between the roller neck and the roller core. Considering the weight of the strip, the rubber layer of the upper coating roller is designed to be slightly softer than the lower coating roller, which can ensure that the thickness of the coating on the upper and lower strip surfaces remains the same.

[0030] The above is only an implementation method of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. 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 utility model, which all belong to the protection scope of the utility model.

Claims

1. A coating roller system for improving the uniformity of coating on the surface of oriented silicon steel, characterized in that: The invention comprises an upper coating roller, a lower coating roller and a lifting device (6), wherein a steel strip (1) is located between the upper coating roller and the lower coating roller, wherein the upper coating roller and the lower coating roller have the same shape and size, and the lifting device (6) can drive the lower coating roller to move up and down, thereby making the lower coating roller approach or move away from the upper coating roller.

2. The coating roller system according to claim 1, characterized in that: The upper coating roller and the lower coating roller both comprise a roller (5), the roller (5) having a certain curvature, being thick in the middle and thin at both ends, two roller necks (4) being welded at both ends of the roller (5), the surface of the roller (5) being covered with a rubber layer having a thickness of 20 to 25 mm, the surface of the rubber layer having micro grooves (7), the rubber layer being divided into two parts, a middle area and an end area, along the axis direction of the roller (5), the length of the middle area being 1 / 2 to 2 / 3 of the length of the roller (5), and the size of the middle micro grooves being different from the size of the end micro grooves.

3. The coating roller system according to claim 2, characterized in that: The micro grooves are trapezoidal, with larger micro grooves in the middle area and smaller micro grooves in the end areas. The groove spacing H of the micro grooves in the middle area is 0.97-1.32 mm, the groove angle β is 120°, the groove top width F is 0.35-0.43 mm, the groove bottom width E is 0.25-0.30 mm, and the groove depth G is 0. The groove spacing D of the micro-grooves in the end area is 0.69-0.87 mm, the groove angle α is 120°, the groove top width B is 0.22-0.34 mm, the groove bottom width A is 0.12-0.20 mm, and the groove depth C is 0.32-0.36 mm.

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