Pre-coating roller optimization method, pre-coating device and adjusting method

Abstract

The invention discloses a pre-coating roller optimization method, a pre-coating device and an adjusting method. The pre-coating roller optimization method comprises the steps that a pre-coating roller finite element analysis model is established; calculating the overall external load of the pre-coating roller; defining the length, the outer diameter and the wall thickness of the pre-coating roller; defining the outer diameter and the wall thickness of the pre-coating roller as variables, setting the droop amount of the pre-coating roller as a target, and setting constraint conditions of the droop amount of the pre-coating roller; calculating to obtain the sagging amount of different pre-coating rollers; the horizontal distance between the vertex P1 in the middle of the pre-coating roller and the P2 at the two ends of the pre-coating roller in the direction perpendicular to the length of the pre-coating roller is obtained through measurement or calculation. According to the pre-coating roller optimization method, the design and production period of the pre-coating roller can be shortened, the number of trial and error times can be reduced, accordingly, the trial and error cost and risk are reduced, meanwhile, the material cost of the pre-coating roller can be reduced, and meanwhile Z-direction errors caused by downward bending of the pre-coating roller due to the dead weight are compensated.

Description

Technical Field

[0001] The present invention relates to the technical field of coating equipment, and in particular to a pre-coating roller optimization method, a pre-coating device and an adjustment method. Background Art

[0002] In the perovskite coating equipment, the coating head is used to coat the substrate. In order to ensure the uniformity of the coating on the edge of the substrate and the entire substrate, the coating head needs to be pre-coated before coating, and the uneven coating liquid in the coating head has been applied to the pre-coating roller, so as to improve the uniformity of the coating on the substrate. The pre-coating effect of the pre-coating roller will affect the coating effect of the coating head, and the distance setting between the coating lip of the coating head and the pre-coating roller plays a decisive factor in the pre-coating effect. Therefore, it is necessary to ensure that the distance from the coating lip of the coating head to the pre-coating roller remains within the preset range.

[0003] However, as the technology of perovskite gradually matures, in order to adapt to market use and reduce production costs, the coating width of the coating head is constantly increasing, so the length of the pre-coating roller is also constantly increasing. Due to the sagging caused by the weight of the pre-coating roller, the distance between the middle of the pre-coating roller and the coating lip of the coating head is large, and the distance between the two ends of the pre-coating roller and the coating lip of the coating head is small, which will cause the problem of uneven liquid discharge on both sides and the middle of the coating head, which will lead to poor pre-coating effect and thus reduce the coating quality. In the prior art, in order to reduce the sagging caused by the weight of the pre-coating roller, one method is to reduce the weight of the pre-coating roller based on experience, but weight reduction relies more on processing experience, requires multiple attempts, and often requires trial production, which will lead to higher trial and error costs and risks. Another method is to use new materials, such as carbon fiber, nanomaterials, etc., but this will increase the material cost of the pre-coating roller and prolong the processing cycle.

[0004] Therefore, how to optimize the design of the pre-coating roller is a difficult problem that needs to be solved urgently. Summary of the invention

[0005] The object of the present invention is to provide a pre-coating roller optimization method, a pre-coating device and an adjustment method, which can not only shorten the design and production cycle of the pre-coating roller, but also reduce the number of trial and error, thereby reducing the trial and error cost and risk, and then improve the pre-coating effect of the pre-coating roller to improve the coating quality of the coating head, and at the same time can also reduce the material cost of the pre-coating roller, and at the same time compensate for the Z-direction error caused by the bending of the pre-coating roller due to its own weight.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] A pre-coating roller optimization method, comprising:

[0008] Creating a structure of a finite element three-dimensional model of a pre-coating roller, defining the Young's modulus of the material of the pre-coating roller, fixing both ends of the pre-coating roller, and establishing a finite element analysis model of the pre-coating roller;

[0009] Calculating the overall external load of the pre-coating roller;

[0010] Defining the length, outer diameter and wall thickness of the pre-coating roller according to the installation space of the pre-coating roller;

[0011] The outer diameter and the wall thickness of the pre-coating roller are defined as variables, the parameters of the outer diameter of the pre-coating roller and the parameters of the wall thickness of the pre-coating roller are set, the droop amount of the pre-coating roller is set as a target and the constraint conditions of the droop amount of the pre-coating roller are set;

[0012] Performing calculations to obtain the sagging amounts of the pre-coating roller corresponding to different parameters of the outer diameter of the pre-coating roller and different parameters of the wall thickness of the pre-coating roller;

[0013] By measurement or calculation, the height of the vertex point P1 in the middle of the pre-coating roller is H1, the height of the point P2 at both ends of the pre-coating roller is H1, and the horizontal distance between the vertex point P1 in the middle of the pre-coating roller and the points P2 at both ends of the pre-coating roller in the direction perpendicular to the length of the pre-coating roller is obtained.

[0014] Preferably, the parameters of the outer diameter of the pre-coating roller include a value range and a variation step of the outer diameter of the pre-coating roller, and the parameters of the wall thickness of the pre-coating roller include a value range and a variation step of the wall thickness of the pre-coating roller.

[0015] A pre-coating device, comprising:

[0016] Base plate;

[0017] A base, the base being arranged on the bottom plate;

[0018] A pre-coating roller, the pre-coating roller having a first end and a second end arranged opposite to each other, the pre-coating roller being rotatably arranged on the base, and the pre-coating roller being used for adhering to the coating liquid sprayed from the coating lip of the coating head;

[0019] A reference point is arranged near the first end and / or the second end of the pre-coating roller, and the reference point is arranged on the bottom plate. There is an initial distance between the base and the reference point. The distance from the reference point to the base is changed by rotating the pre-coating roller around the midpoint in the length direction of the pre-coating roller, so as to reduce the difference between the distance from the middle position of the pre-coating roller to the coating lip of the coating head and the distance from the two end positions of the pre-coating roller to the coating lip of the coating head.

[0020] Preferably, the distance from the reference point to the base is changed by rotating the pre-coating roller around the midpoint in the length direction of the pre-coating roller, so that the distance from the middle position of the pre-coating roller to the coating lip of the coating head is equal to the distance from the two end positions of the pre-coating roller to the coating lip of the coating head.

[0021] Preferably, it also includes a combined block gauge, the thickness of which is equal to the sum or difference of the initial distance from the reference point to the base and the distance of rotation of the two ends of the pre-coating roller, and the combined block gauge is arranged between the base and the reference point, and the combined block gauge is used to determine whether the pre-coating roller is rotated to a predetermined position.

[0022] Preferably, when the pre-coating roller rotates in a direction close to the reference point, the thickness of the combined block gauge is equal to the difference between the initial distance from the reference point to the base and the distance rotated by the two ends of the pre-coating roller;

[0023] When the pre-coating roller rotates in a direction away from the reference point, the thickness of the combined block gauge is equal to the sum of the initial distance from the reference point to the base and the rotation distance of the two ends of the pre-coating roller.

[0024] Preferably, it further comprises a central axis, one end of the central axis is connected to the base, the other end of the central axis is connected to the bottom plate, and the base can rotate around the central axis.

[0025] Preferably, it further comprises a driving device, which is connected to the pre-coating roller and is used to drive the pre-coating roller to rotate.

[0026] Preferably, the pre-coating roller is made of hollow structural steel; and / or,

[0027] The surface of the pre-coating roller is provided with a passivation layer.

[0028] A method for adjusting a pre-coating device, comprising:

[0029] Obtained by measurement or calculation, the height of the vertex point P1 in the middle of the pre-coating roller is H1, the height of the point P2 at both ends of the pre-coating roller is H1, the horizontal distance between the vertex point P1 in the middle of the pre-coating roller and the points P2 at both ends of the pre-coating roller in the direction perpendicular to the length of the pre-coating roller, and the initial distance between the base and the reference point;

[0030] The distance from the reference point to the base is changed by rotating the pre-coating roller around the midpoint of the pre-coating roller in the length direction, so as to reduce the difference between the distance from the middle position of the pre-coating roller to the coating lip of the coating head and the distance from the two end positions of the pre-coating roller to the coating lip of the coating head.

[0031] Compared with the prior art, the beneficial effects of the present invention include at least:

[0032] The pre-coating roller optimization method, pre-coating device and adjustment method of the present invention use finite element optimization design, can pre-set design parameters, and can obtain the droop amount of the pre-coating roller under different design parameters, which can reduce reliance on experience, not only can reduce the design difficulty of the pre-coating roller, can shorten the design and production cycle of the pre-coating roller, improve the design accuracy, ensure that the pre-coating roller achieves the expected effect, thereby reducing the number of trial and error, reducing the trial and error cost and risk, and then improving the pre-coating effect of the pre-coating roller to improve the coating quality of the coating head. In addition, the horizontal distance between the points at the same height as the vertices at the middle of the pre-coating roller and the vertex at the middle of the pre-coating roller in a direction perpendicular to the length of the pre-coating roller can be obtained by calculation or measurement. The pre-coating roller can be rotated to change the angle between the rotation axis of the pre-coating roller and the length direction of the coating lip of the coating head to reduce the difference between the distance from the middle of the pre-coating roller to the coating lip of the coating head and the distance from the two ends of the pre-coating roller to the coating lip of the coating head, that is, the distance from the middle of the pre-coating roller to the coating lip of the coating head is the same or approximately the same as the distance from the two ends of the pre-coating roller to the coating lip of the coating head, that is, the Z-direction error caused by the bending of the pre-coating roller due to its own weight is compensated, thereby improving the pre-coating effect of the coating head and thus improving the coating quality of the coating head. At the same time, since the difference between the distance from the middle position of the pre-coating roller to the coating lip of the coating head and the distance from the two end positions of the pre-coating roller to the coating lip of the coating head can be reduced by rotating the pre-coating roller, the requirements for the material of the pre-coating roller and the requirements for the processing accuracy of the pre-coating roller can be reduced, thereby reducing the processing difficulty of the pre-coating roller and the material cost of the pre-coating roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a flow chart of a pre-coating roller optimization method according to an embodiment.

[0034] Figure 2 3 is a distribution diagram of the sagging amount of the pre-coating roller in the embodiment of the present invention when an external load is applied.

[0035] Figure 3 It is a schematic diagram of calculating the distance that the pre-coating roller needs to adjust in an embodiment of the present invention.

[0036] Figure 4 It is a schematic diagram of calculating the distance that the pre-coating roller needs to be adjusted when the sagging amount is known in an embodiment of the present invention.

[0037] Figure 5 A schematic diagram of the three-dimensional structure of a pre-coating device according to an embodiment of the present invention.

[0038] Figure 6 It is a schematic diagram of the planar structure of the pre-coating device according to an embodiment of the present invention.

[0039] Figure 7yes Figure 6 A partial enlarged view of point F in the middle.

[0040] Figure 8 yes Figure 6 Schematic diagram of the cross section along the DD direction.

[0041] Fig. 9 yes Figure 8 A partial enlarged view of point G in the middle.

[0042] Fig.10 yes Figure 6 Schematic diagram of the cross section along the EE direction.

[0043] Fig.11 yes Fig.10 A partial enlarged view of point H in the middle.

[0044] In the figure: 100, pre-coating device; 1, bottom plate; 11, through hole; 2, base; 21, bottom wall; 22, first side wall; 23, second side wall; 24, accommodating space; 25, first end plate; 26, second end plate; 27, first support member; 28, second support member; 3, pre-coating roller; 31, first end; 32, second end; 33, first connecting shaft; 34, second connecting shaft; 4, driving device; 5, center axis; 6, reference point; 7, combination block gauge; 200, coating head; 210, coating lip. DETAILED DESCRIPTION

[0045] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0046] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0047] refer to Figures 1 to 11 The present invention provides a method for optimizing a pre-coating roller 3, comprising: steps S10 to S60

[0048] Step S10: Create the structure of the finite element three-dimensional model of the pre-coating roller 3, define the Young's modulus of the material of the pre-coating roller 3, fix the two ends of the pre-coating roller 3, and establish the finite element analysis model of the pre-coating roller 3.

[0049] Specifically, first, it is necessary to establish a three-dimensional model of the pre-coating roller 3, which can be created by software such as AutoCAD, SolidWorks, or directly drawn in finite element analysis software. In this embodiment, SolidWorks is used to design the geometric model of the pre-coating roller 3, the material Young's modulus of the pre-coating roller 3 is defined by SolidWorks, the two ends of the pre-coating roller 3 are fixed, that is, the positions of the two ends of the pre-coating roller 3 are fixed, and the finite element analysis model of the pre-coating roller 3 is established.

[0050] Since the droop of the pre-coating roller 3 due to its own weight is positively correlated with the Young's modulus of the pre-coating roller 3, and the Young's modulus deviation of ordinary structural steel and alloy steel is about 5%, the effect on the overall natural droop of the pre-coating roller 3 is not significant, but the material cost of alloy steel for the pre-coating roller 3 will increase exponentially, and the price of ordinary structural steel is cheap, and the raw materials of ordinary structural steel pipes are relatively common and easy to purchase in the market, so the use of ordinary structural steel is comprehensively considered for weight reduction and size optimization. In this embodiment, the pre-coating roller 3 is made of hollow structural steel, that is, the pre-coating roller 3 is cylindrical as a whole, the pre-coating roller 3 adopts a hollow structure, and the material of the pre-coating roller 3 is 45# steel.

[0051] The pre-coating roller 3 model is divided into a finite number of small units (for example, triangles, quadrilaterals, tetrahedrons, hexahedrons, etc.), each of which has its own physical properties (such as stress, strain, etc.). The accuracy of the grid has a great influence on the accuracy of the results and the efficiency of calculation. Usually, the appropriate grid density is selected by checking the grid independence.

[0052] Step S20: An external load is applied to the entire pre-coating roller 3 and a calculation is performed.

[0053] Specifically, refer to Figure 2 , an external load is applied to the pre-coating roller 3 as a whole, the external load is, for example, the self-gravity of the pre-coating roller 3, and the deformation of the pre-coating roller 3 at different positions can be obtained by calculation, and the sagging of the pre-coating roller 3 due to its own gravity can be simulated, so that it can be determined that the sagging amount of the middle position of the pre-coating roller 3 is the largest, and the sagging amount of the pre-coating roller 3 gradually decreases from the center position of the pre-coating roller 3 to both ends and is symmetrically distributed.

[0054] Step S30: defining the length, outer diameter and wall thickness of the pre-coating roller 3 according to the installation space of the pre-coating roller 3.

[0055] Specifically, according to material mechanics, when the length and cross-sectional area of ​​the pre-coating roller 3 are the same, the larger the outer diameter of the pre-coating roller 3, the greater the rigidity of the structure of the pre-coating roller 3, and the stronger the ability of the pre-coating roller 3 to resist sagging due to its own weight. However, considering the space of the pre-coating roller 3 and the ability of its surface to resist external forces, the outer diameter of the pre-coating roller 3 cannot be excessively increased, which will cause the wall thickness of the pre-coating roller 3 to be too thin, so the space size in the actual design can be given priority as the upper limit and lower limit of the optimized design for optimization design. The length, outer diameter and wall thickness of the pre-coating roller 3 are defined according to the installation space of the base 2 of the pre-coating device 100.

[0056] Step S40: define the outer diameter and wall thickness of the pre-coating roller 3 as variables, set the parameters of the outer diameter of the pre-coating roller 3 and the parameters of the wall thickness of the pre-coating roller 3, set the droop amount of the pre-coating roller 3 as the target and set the constraint conditions of the droop amount of the pre-coating roller 3.

[0057] Specifically, since the outer diameter and wall thickness of the pre-coating roller 3 have a great influence on the rigidity of the structure of the pre-coating roller 3, that is, the outer diameter and wall thickness of the pre-coating roller 3 have a great influence on the ability of the pre-coating roller 3 to resist sagging due to its own weight, the outer diameter and wall thickness of the pre-coating roller 3 are defined as variables, and the parameters of the outer diameter of the pre-coating roller 3 and the parameters of the wall thickness of the pre-coating roller 3 are set. The parameters of the outer diameter of the pre-coating roller 3 include the value range and variation step of the outer diameter of the pre-coating roller 3, and the parameters of the wall thickness of the pre-coating roller 3 include the value range and variation step of the wall thickness of the pre-coating roller 3. The sagging amount of the pre-coating roller 3 is set as a target and the constraint conditions of the sagging amount of the pre-coating roller 3 are set. In this embodiment, the outer diameter of the pre-coating roller 3 is designed to be 90 mm, the upper limit of the outer diameter of the pre-coating roller 3 is 90 mm, the lower limit of the outer diameter of the pre-coating roller 3 is 88 mm, the step length is 2 mm, and the outer diameter of the pre-coating roller 3 can be 88 mm and 90 mm. The wall thickness of the pre-coating roller 3 is designed to be 5 mm, the upper limit of the wall thickness of the pre-coating roller 3 is 6 mm, the lower limit of the wall thickness of the pre-coating roller 3 is 4.5 mm, the step length is 0.5 mm, and the wall thickness of the pre-coating roller 3 can be 4.5 mm, 5 mm, 5.5 mm, and 6 mm. The droop amount at the middle position of the pre-coating roller 3 is set as the target, and the constraint condition of the droop amount of the pre-coating roller 3 is that the droop amount of the pre-coating roller 3 is less than 0.01 mm.

[0058] Step S50 : performing calculations to obtain the sagging amounts of the pre-coating roller 3 corresponding to parameters of different outer diameters of the pre-coating roller 3 and parameters of different wall thicknesses of the pre-coating roller 3 .

[0059] Specifically, calculations are performed to obtain the droop of the pre-coating roller 3 corresponding to the parameters of the outer diameter of the different pre-coating rollers 3 and the parameters of the wall thickness of the different pre-coating rollers 3, and the calculation results are shown in Table 1. In this embodiment, by combining the parameters of the outer diameter of the different pre-coating rollers 3 and the parameters of the wall thickness of the different pre-coating rollers 3, a total of eight pre-coating rollers 3 with different parameters are generated, and the droop of the eight different pre-coating rollers 3 is calculated, and the best design solution can be obtained by comparison. As an example, this application is explained with the outer diameter of the pre-coating roller 3 being 90mm and the wall thickness of the pre-coating roller 3 being 5mm, and the droop of the pre-coating roller 3 is 0.009178mm, that is, the droop at the middle position of the pre-coating roller 3 is 0.009178mm.

[0060] Table 1

[0061] category Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5 Scenario 6 Scenario 7 Scenario 8 Outer diameter / mm 88 90 88 90 88 90 88 90 Wall thickness / mm 4.5 4.5 5 5 5.5 5.5 6 6 Sagging amount / mm 0.008886 0.008803 0.00927 0.009178 0.009633 0.009534 0.009978 0.009859

[0062] Step S60: By measuring or calculating, the height of the vertex point P1 in the middle of the pre-coating roller is H1, the height of the point P2 at both ends of the pre-coating roller is H1, and the horizontal distance between the vertex point P1 in the middle of the pre-coating roller and the points P2 at both ends of the pre-coating roller in the direction perpendicular to the length of the pre-coating roller is obtained.

[0063] Specifically, in order to reduce the processing time and cost of the pre-coating roller 3, an allowable deviation is also given, that is, an allowable droop of the pre-coating roller 3 is given. In order to keep the distances between the middle and both ends of the pre-coating roller 3 and the coating lip 210 consistent, this deviation needs to be compensated. The angle between the pre-coating roller 3 and the coating lip 210 in the length direction can be adjusted. This is because when gradually changing from the vertex A of the circle to both sides, in the vertical direction, the distance BC from the point B on the circle to the horizontal line of the center of the circle will decrease, such as Figure 3 Then we inspect the pre-coating roller 3 actually produced, obtain the sagging amount of the pre-coating roller 3, use the parametric design software to input the parameters into the graph to obtain the distance that the pre-coating roller 3 needs to be adjusted, that is, through measurement or calculation, the height of the vertex point P1 in the middle of the pre-coating roller 3 is H1, and the height of the two ends of the pre-coating roller 3 is point P2 of H1. Point P2 is equivalent to Figure 3 Point B in the figure, points P1, P2 and B are on the same horizontal plane. Figure 3The distance between point A and point P1 in the height direction is the sagging amount of the pre-coating roller 3. The horizontal distance between the vertex point P1 at the middle of the pre-coating roller 3 and the point P2 at both ends of the pre-coating roller 3 in the direction perpendicular to the length of the pre-coating roller 3 is the distance that the pre-coating roller 3 needs to be adjusted. In other words, the horizontal distance between the points at the same height as the vertex at the middle of the pre-coating roller 3 at both ends of the pre-coating roller 3 and the vertex at the middle of the pre-coating roller 3 in the direction perpendicular to the length of the pre-coating roller 3 is obtained by measurement or calculation. This horizontal distance is the distance that the pre-coating roller 3 needs to be adjusted. This achieves a very high precision and is easy to implement without the need for processing. Even if the pre-coating roller 3 has a certain natural sagging, it can be adjusted to achieve a consistent distance to ensure the pre-coating effect.

[0064] As an example, refer to Figure 4 When the droop of the pre-coating roller 3 is 0.009178 mm, that is, the droop of the middle position of the pre-coating roller 3 is 0.009178 mm, after calculation or measurement, the horizontal distance between the points at the same height as the vertex in the middle position of the pre-coating roller 3 at both ends of the pre-coating roller 3 and the vertex in the middle position of the pre-coating roller 3 in the direction perpendicular to the length of the pre-coating roller 3 is 0.949 mm, that is, the two ends of the pre-coating roller 3 need to be rotated 0.949 mm.

[0065] In the present application, by adopting finite element optimization design, the design parameters can be set in advance, and the droop amount of the pre-coating roller 3 under different design parameters can be obtained, which can reduce reliance on experience, not only reducing the design difficulty of the pre-coating roller 3, but also shortening the design and production cycle of the pre-coating roller 3, improving the design accuracy, and ensuring that the pre-coating roller 3 achieves the expected effect, thereby reducing the number of trial and error, reducing the cost and risk of trial and error, and then improving the pre-coating effect of the pre-coating roller 3, so as to improve the coating quality of the coating head 200. In addition, the horizontal distance between the points at the same height as the vertices at the middle of the pre-coating roller 3 at both ends of the pre-coating roller 3 and the vertices at the middle of the pre-coating roller 3 in the direction perpendicular to the length of the pre-coating roller 3 can be obtained by calculation or measurement. The angle between the rotation axis of the pre-coating roller 3 and the length direction of the coating lip 210 of the coating head 200 can be changed by rotating the pre-coating roller 3, so as to reduce the difference between the distance from the middle of the pre-coating roller 3 to the coating lip 210 of the coating head 200 and the distance from the two ends of the pre-coating roller 3 to the coating lip 210 of the coating head 200, that is, the distance from the middle of the pre-coating roller 3 to the coating lip 210 of the coating head 200 is the same or approximately the same as the distance from the two ends of the pre-coating roller 3 to the coating lip 210 of the coating head 200, that is, the Z-direction error caused by the bending of the pre-coating roller 3 due to its own weight is compensated, so that the pre-coating effect of the coating head 200 can be improved, thereby improving the coating quality of the coating head 200. At the same time, since the difference between the distance from the middle position of the pre-coating roller 3 to the coating lip 210 of the coating head 200 and the distance from the two end positions of the pre-coating roller 3 to the coating lip 210 of the coating head 200 can be reduced by rotating the pre-coating roller 3, the requirements for the material of the pre-coating roller 3 and the requirements for the processing accuracy of the pre-coating roller 3 can also be reduced, thereby reducing the processing difficulty of the pre-coating roller 3 and the material cost of the pre-coating roller 3.

[0066] refer to Figures 1 to 11 The present invention also provides a pre-coating device 100, comprising: a bottom plate 1, a base 2 and a pre-coating roller 3, wherein the pre-coating roller 3 is rotatably arranged on the base 2, and the base 2 is arranged on the bottom plate 1. The pre-coating device 100 may also include a driving device 4, a central axis 5, a reference point 6 and a combined block gauge 7, wherein the driving device 4 is used to drive the pre-coating roller 3 to rotate, and the two ends of the central axis 5 are respectively connected to the bottom plate 1 and the base 2, and the base 2 can rotate relative to the bottom plate 1 around the central axis 5.

[0067] Specifically, refer to Figure 1The bottom plate 1 as a whole can be in the shape of a flat plate, and the bottom plate 1 provides support for the pre-coating device 100 as a whole. The base 2 as a whole is a hollow rectangular parallelepiped, and the base 2 can include a bottom wall 21 and a first side wall 22 and a second side wall 23 arranged on opposite sides of the bottom wall 21. The first side wall 22 and the second side wall 23 are respectively arranged vertically or approximately vertically to the bottom wall 21, and the first side wall 22 and the second side wall 23 are arranged parallel or approximately parallel, so that the cross section of the base 2 along the axis perpendicular to the pre-coating roller 3 is U-shaped, and the bottom wall 21, the first side wall 22 and the second side wall 23 are surrounded to form a receiving space 24. The first end plate 25 and the second end plate 26 can also be arranged at both ends of the base 2, and the first end plate 25 and the second end plate 26 can not only support the pre-coating roller 3, but also prevent the coating liquid in the receiving space 24 from leaking out.

[0068] refer to Figure 1 , Figure 2 , Fig. 9 The pre-coating roller 3 can be cylindrical as a whole, and has a first end 31 and a second end 32 arranged opposite to each other. The pre-coating roller 3 can be rotatably arranged on the base 2, and at least part of the pre-coating roller 3 is arranged in the accommodating space 24. The pre-coating roller 3 is used to adhere to the coating liquid sprayed from the coating lip 210 of the coating head 200. The pre-coating roller 3 is preferably made of stainless steel, which has the characteristics of corrosion resistance and high strength, and can ensure that the pre-coating roller 3 can work stably for a long time. The pre-coating roller 3 is more preferably made of hollow structural steel, such as No. 45 steel pipe, because the raw materials of ordinary structural steel pipes are relatively common and easy to purchase in the market, which can reduce the material cost of the pre-coating roller 3, and at the same time can shorten the production cycle and processing difficulty of the pre-coating roller 3.

[0069] As a preferred embodiment, the surface of the pre-coating roller 3 may be provided with a passivation layer (not shown), which can effectively prevent the surface of the pre-coating roller 3 from being oxidized. The passivation layer can form a stable oxide film on the surface of the pre-coating roller 3, so that the surface of the pre-coating roller 3 does not directly contact the oxygen in the air, thereby avoiding rust or corrosion of the pre-coating roller 3. In particular, the passivation layer can enhance the corrosion resistance of the surface of the pre-coating roller 3, especially when used in an acidic or other extreme environment, it can effectively protect the surface of the pre-coating roller 3 from corrosion. The passivation layer can also improve the wear resistance of the surface of the pre-coating roller 3 and extend the service life of the pre-coating roller 3. Passivation layers of different materials can be sprayed according to different process use environments. The materials of the passivation layer are, for example, chromic acid passivation, zinc passivation, molybdenum passivation, copper passivation, silicon passivation, organic passivation, and titanium passivation.

[0070] The length of the pre-coating roller 3 is greater than or equal to the length of the coating head 200, which can ensure that the coating liquid sprayed by the coating head 200 during pre-coating can all adhere to the pre-coating roller 3, thereby improving the pre-coating effect of the coating head 200. The length of the pre-coating roller 3 is preferably greater than the length of the coating head 200, which can reduce the accuracy requirements of the coating head 200 aligning the pre-coating roller 3, and further ensure that the coating liquid sprayed by the coating head 200 during pre-coating can all adhere to the pre-coating roller 3. The length of the pre-coating roller 3 is less than or equal to the length of the base 2, that is, the length of the pre-coating roller 3 is less than or equal to the length of the accommodating space 24, so that the pre-coating roller 3 can be completely in the accommodating space 24 in the length direction, ensuring that the coating liquid attached to the pre-coating roller 3 will not flow outside the accommodating space 24.

[0071] refer to Figure 1 , Figure 2 The pre-coating device 100 may further include a driving device 4, which is connected to the pre-coating roller 3 and is used to drive the pre-coating roller 3 to rotate. The driving device 4 may be a motor, which can drive the pre-coating roller 3 to rotate, so as to realize automatic rotation of the pre-coating roller 3. The first end 31 and the second end 32 of the pre-coating roller 3 may be respectively provided with a first connecting shaft 33 and a second connecting shaft 34, and the first connecting shaft 33 and the second connecting shaft 34 pass through the first end plate 25 and the second end plate 26 respectively, and the first connecting shaft 33 and the second connecting shaft 34 are respectively rotatably connected to the first end plate 25 and the second end plate 26, and the first end plate 25 and the second end plate 26 have a certain supporting effect on the pre-coating roller 3, thereby improving the stability of the rotation of the pre-coating roller 3. The other end of the first connecting shaft 33 may be connected to the driving device 4, and the other end of the second connecting shaft 34 may also be connected to the driving device 4. The number of the driving devices 4 may be one or two. When there is one driving device 4, the driving device 4 is connected to the pre-coating roller 3 through the first connecting shaft 33 or the second connecting shaft 34 and can drive the pre-coating roller 3 to rotate. When there are two driving devices 4, the two driving devices 4 are respectively connected to the first end 31 and the second end 32 of the pre-coating roller 3 through the first connecting shaft 33 and the second connecting shaft 34 and simultaneously drive the pre-coating roller 3 to rotate, and the two driving devices 4 are synchronous motors. The driving device 4 can also be connected to a controller (not shown), and the controller can control the speed, time and other parameters of the driving device 4 to meet actual production needs.

[0072] refer to Figure 1 , Figure 2The base 2 may further include a first support member 27 and a second support member 28 respectively disposed at the first end 31 and the second end 32 of the pre-coating roller 3, and the first support member 27 and the second support member 28 are respectively used to support the first end 31 and the second end 32 of the pre-coating roller 3. The first support member 27 and the second support member 28 are respectively disposed at the outer sides of the first end 31 and the second end 32 of the pre-coating roller 3, and the first connecting shaft 33 and the second connecting shaft 34 are respectively rotatably connected to the first support member 27 and the second support member 28, so as to further improve the stability of the pre-coating roller 3, thereby improving the pre-coating effect of the coating head 200.

[0073] refer to Figure 7 , wherein a reference point 6 is provided near the first end 31 and / or the second end 32 of the pre-coating roller 3, and the reference point 6 can be provided on the bottom plate 1, for example, when the length direction of the coating head 200 is parallel to the length direction of the pre-coating roller 3, that is, when the coating head 200 moves to the top of the pre-coating roller 3 line of the pre-coating roller 3, there is an initial distance between the base 2 and the reference point 6, and the distance from the reference point 6 to the base 2 is changed by rotating the pre-coating roller 3 around the midpoint in the length direction of the pre-coating roller 3, that is, by rotating the pre-coating roller 3 to change the angle between the rotation axis of the pre-coating roller 3 and the length direction of the coating lip 210 of the coating head 200, so as to reduce the difference between the distance from the middle position of the pre-coating roller 3 to the coating lip 210 of the coating head 200 and the distance from the two end positions of the pre-coating roller 3 to the coating lip 210 of the coating head 200. That is, the distance from the middle of the pre-coating roller 3 to the coating lip 210 of the coating head 200 is the same or approximately the same as the distance from the two ends of the pre-coating roller 3 to the coating lip 210 of the coating head 200, that is, the Z-direction error caused by the bending of the pre-coating roller 3 due to its own weight is compensated, so that the pre-coating effect of the coating head 200 can be improved, thereby improving the coating quality of the coating head 200. At the same time, since the difference between the distance from the middle position of the pre-coating roller 3 to the coating lip 210 of the coating head 200 and the distance from the two ends of the pre-coating roller 3 to the coating lip 210 of the coating head 200 can be reduced by rotating the pre-coating roller 3, the requirements for the material of the pre-coating roller 3 and the requirements for the processing accuracy of the pre-coating roller 3 can be reduced, so that the processing difficulty of the pre-coating roller 3 and the material cost of the pre-coating roller 3 can be reduced.

[0074] As a preferred method, the distance from the reference point 6 to the base 2 is changed by rotating the pre-coating roller 3 around the midpoint of the length direction of the pre-coating roller 3, so that the distance from the middle position of the pre-coating roller 3 to the coating lip 210 of the coating head 200 is equal to the distance from the two end positions of the pre-coating roller 3 to the coating lip 210 of the coating head 200. This can ensure that the distance from the middle of the pre-coating roller 3 to the coating lip 210 of the coating head 200 is the same as the distance from the two end positions of the pre-coating roller 3 to the coating lip 210 of the coating head 200. This can further improve the pre-coating effect of the coating head 200, thereby further improving the coating quality of the coating head 200.

[0075] In a specific embodiment, reference Figure 7 The pre-coating device 100 may also include a combined block gauge 7. The combined block gauge 7 may be composed of a plurality of standard block gauges of different thicknesses. The number and specification of the standard block gauges may be selected according to the required thickness of the combined block gauge 7. The thickness of the combined block gauge 7 is equal to the sum or difference of the initial distance from the reference point 6 to the base 2 and the distance of rotation of the two ends of the pre-coating roller 3. The combined block gauge 7 may be arranged between the base 2 and the reference point 6. The combined block gauge 7 is used to determine whether the pre-coating roller 3 is rotated to a predetermined position, that is, when the base 2 and the reference point 6 are both tightly fitted with the combined block gauge 7, the distance between the base 2 and the reference point 6 is the thickness of the combined block gauge 7, which indicates that the pre-coating roller 3 is rotated to a predetermined position.

[0076] Since the base 2 can rotate clockwise or counterclockwise, both methods can change the angle between the rotation axis of the pre-coating roller 3 and the length direction of the coating lip 210 of the coating head 200, so as to reduce the difference between the distance from the middle position of the pre-coating roller 3 to the coating lip 210 of the coating head 200 and the distance from the two end positions of the pre-coating roller 3 to the coating lip 210 of the coating head 200.

[0077] As an example, refer to Figure 4 , when the droop of the pre-coating roller 3 is 0.009178mm, that is, the droop of the middle position of the pre-coating roller 3 is 0.009178mm, after calculation or measurement, the horizontal distance between the points at the same height as the vertex at the middle position of the pre-coating roller 3 at both ends of the pre-coating roller 3 and the vertex at the middle position of the pre-coating roller 3 in the direction perpendicular to the length of the pre-coating roller 3 is 0.949mm, that is, the two ends of the pre-coating roller 3 need to rotate 0.949mm. When the pre-coating roller 3 rotates in the direction close to the reference point 6, the thickness of the combined block gauge 7 is equal to the difference between the initial distance from the reference point 6 to the base 2 and the distance of rotation of the two ends of the pre-coating roller 3, that is, the thickness of the combined block gauge 7 is equal to the difference between the initial distance from the reference point 6 to the base 2 and 0.949mm. When the pre-coating roller 3 rotates in the direction away from the reference point 6, the thickness of the combined block gauge 7 is equal to the sum of the initial distance from the reference point 6 to the base 2 and the rotation distance of the two ends of the pre-coating roller 3, that is, the thickness of the combined block gauge 7 is equal to the sum of the initial distance from the reference point 6 to the base 2 and 0.949 mm.

[0078] As a preferred method, refer to Fig.11The pre-coating device 100 may also include a central axis 5, which is preferably cylindrical as a whole. Of course, the central axis 5 may also be in other shapes. One end of the central axis 5 is connected to the base 2, that is, one end of the central axis 5 is connected to the bottom wall 21 of the base 2, and the other end of the central axis 5 is connected to the bottom plate 1, and the base 2 can rotate around the central axis 5. More preferably, the position where one end of the central axis 5 is connected to the base 2 corresponds to the center point of the pre-coating roller 3, and the first end 31 and the second end 32 of the pre-coating roller 3 are symmetrically arranged about the central axis 5. After the pre-coating roller 3 sags, the central position of the pre-coating roller 3 sags the most, and the sag of the pre-coating roller 3 gradually decreases from the central position of the pre-coating roller 3 to the two ends and is symmetrically distributed. In this way, when the base 2 rotates, it can drive the first end 31 and the second end 32 of the pre-coating roller 3 to rotate at the same speed, ensuring that the distance between the pre-coating roller 3 as a whole and the coating lip 210 of the coating head 200 is consistent, thereby improving the pre-coating effect.

[0079] The base 2 and the bottom plate 1 can be fixedly connected by a fixing member (not shown), such as a screw, etc. The number of the fixing members can be multiple, and the multiple fixing members can be respectively arranged near the two ends of the base 2. Before rotating the base 2, the fixing member can be loosened first, so as to facilitate the rotation of the base 2. After the rotation of the base 2 is completed, the fixing member is tightened to prevent the position of the base 2 from being offset.

[0080] refer to Fig.11 The bottom plate 1 may be provided with a through hole 11 for the central shaft 5 to pass through, one end of the central shaft 5 may pass through the through hole 11 and be connected to the bottom wall 21 of the base 2, and the other end of the central shaft 5 may be arranged in the through hole 11, so that the central shaft 5 connects the base 2 with the bottom plate 1. Of course, the central shaft 5 may also connect the base 2 with the bottom plate 1 in other forms.

[0081] The present invention also provides a method for adjusting the pre-coating device 100, comprising the following steps.

[0082] It is obtained by measurement or calculation that the height of the vertex point P1 in the middle of the pre-coating roller 3 is H1, the height of the point P2 at both ends of the pre-coating roller 3 is H1, and the horizontal distance between the vertex point P1 in the middle of the pre-coating roller 3 and the point P2 at both ends of the pre-coating roller 3 in the direction perpendicular to the length of the pre-coating roller 3 is the distance that the pre-coating roller 3 needs to be adjusted. In other words, it is obtained by measurement or calculation that the horizontal distance between the points at the same height as the vertex in the middle of the pre-coating roller 3 at both ends of the pre-coating roller 3 and the vertex in the middle of the pre-coating roller 3 in the direction perpendicular to the length of the pre-coating roller 3 is the distance that the pre-coating roller 3 needs to be adjusted, and the initial distance between the base 2 and the reference point 6.

[0083] The distance from the reference point 6 to the base 2 is changed by rotating the pre-coating roller 3 around the midpoint in the length direction of the pre-coating roller 3, so as to reduce the difference between the distance from the middle position of the pre-coating roller 3 to the coating lip 210 of the coating head 200 and the distance from the two end positions of the pre-coating roller 3 to the coating lip 210 of the coating head 200, and the combination block gauge 7 is used to determine whether the pre-coating roller 3 rotates to the predetermined position. The combination block gauge 7 can be set between the base 2 and the reference point 6, and the thickness of the combination block gauge 7 is equal to the sum or difference of the initial distance from the reference point 6 to the base 2 and the distance of the rotation of the two ends of the pre-coating roller 3. As an example, when the pre-coating roller 3 rotates in the direction away from the reference point 6, the thickness of the combination block gauge 7 is equal to the sum of the initial distance from the reference point 6 to the base 2 and the distance of the rotation of the two ends of the pre-coating roller 3.

[0084] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A pre-coating roller optimization method, characterized in that: include: Creating a structure of a finite element three-dimensional model of a pre-coating roller, defining the Young's modulus of the material of the pre-coating roller, fixing both ends of the pre-coating roller, and establishing a finite element analysis model of the pre-coating roller; Calculating the overall external load of the pre-coating roller; Defining the length, outer diameter and wall thickness of the pre-coating roller according to the installation space of the pre-coating roller; The outer diameter and the wall thickness of the pre-coating roller are defined as variables, the parameters of the outer diameter of the pre-coating roller and the parameters of the wall thickness of the pre-coating roller are set, the droop amount of the pre-coating roller is set as a target and the constraint conditions of the droop amount of the pre-coating roller are set; Performing calculations to obtain the sagging amounts of the pre-coating roller corresponding to different parameters of the outer diameter of the pre-coating roller and different parameters of the wall thickness of the pre-coating roller; By measurement or calculation, the height of the vertex point P1 in the middle of the pre-coating roller is H1, the height of the point P2 at both ends of the pre-coating roller is H1, and the horizontal distance between the vertex point P1 in the middle of the pre-coating roller and the points P2 at both ends of the pre-coating roller in the direction perpendicular to the length of the pre-coating roller is obtained.

2. The pre-coating roller optimization method according to claim 1, characterized in that: The parameters of the outer diameter of the pre-coating roller include a value range and a variation step of the outer diameter of the pre-coating roller, and the parameters of the wall thickness of the pre-coating roller include a value range and a variation step of the wall thickness of the pre-coating roller.

3. A pre-coating device, characterized in that: include: Base plate; A base, the base being arranged on the bottom plate; A pre-coating roller, the pre-coating roller having a first end and a second end arranged opposite to each other, the pre-coating roller being rotatably arranged on the base, and the pre-coating roller being used for adhering to the coating liquid sprayed from the coating lip of the coating head; A reference point is arranged near the first end and / or the second end of the pre-coating roller, and the reference point is arranged on the bottom plate. There is an initial distance between the base and the reference point. The distance from the reference point to the base is changed by rotating the pre-coating roller around the midpoint in the length direction of the pre-coating roller, so as to reduce the difference between the distance from the middle position of the pre-coating roller to the coating lip of the coating head and the distance from the two end positions of the pre-coating roller to the coating lip of the coating head.

4. The pre-coating device according to claim 3, characterized in that: The distance from the reference point to the base is changed by rotating the pre-coating roller around the midpoint in the length direction of the pre-coating roller, so that the distance from the middle position of the pre-coating roller to the coating lip of the coating head is equal to the distance from the two end positions of the pre-coating roller to the coating lip of the coating head.

5. The pre-coating device according to claim 3, characterized in that: It also includes a combined block gauge, the thickness of which is equal to the sum or difference of the initial distance from the reference point to the base and the distance of rotation of the two ends of the pre-coating roller. The combined block gauge is arranged between the base and the reference point, and the combined block gauge is used to determine whether the pre-coating roller is rotated to a predetermined position.

6. The pre-coating device according to claim 5, characterized in that: When the pre-coating roller rotates in a direction close to the reference point, the thickness of the combined block gauge is equal to the difference between the initial distance from the reference point to the base and the distance of rotation of the two ends of the pre-coating roller; When the pre-coating roller rotates in a direction away from the reference point, the thickness of the combined block gauge is equal to the sum of the initial distance from the reference point to the base and the rotation distance of the two ends of the pre-coating roller.

7. The pre-coating device according to claim 3, characterized in that: It also includes a central axis, one end of which is connected to the base, and the other end of which is connected to the bottom plate, and the base can rotate around the central axis.

8. The pre-coating device according to claim 3, characterized in that: It also includes a driving device, which is connected to the pre-coating roller and is used to drive the pre-coating roller to rotate.

9. The pre-coating device according to claim 3, characterized in that: The pre-coating roller is made of hollow structural steel; and / or, The surface of the pre-coating roller is provided with a passivation layer.

10. A method for adjusting a pre-coating device, characterized in that: include: Obtained by measurement or calculation, the height of the vertex point P1 in the middle of the pre-coating roller is H1, the height of the point P2 at both ends of the pre-coating roller is H1, the horizontal distance between the vertex point P1 in the middle of the pre-coating roller and the points P2 at both ends of the pre-coating roller in the direction perpendicular to the length of the pre-coating roller, and the initial distance between the base and the reference point; The distance from the reference point to the base is changed by rotating the pre-coating roller around the midpoint of the pre-coating roller in the length direction, so as to reduce the difference between the distance from the middle position of the pre-coating roller to the coating lip of the coating head and the distance from the two end positions of the pre-coating roller to the coating lip of the coating head.

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