A method for determining spraying parameters, a spraying method and a device

Abstract

The present invention relates to the field of spraying technology, and discloses a method for determining spraying parameters, a spraying method and a device. The method presets multiple spraying parameter schemes. To reduce system errors, each spraying parameter scheme corresponds to a number of spray width plates for spraying. According to the total film thickness value and spray width curve calculated by each spraying parameter scheme, several test schemes with better effects are screened out from the preset schemes, and the screened test schemes are sprayed on a workpiece. According to the film thickness values ​​calculated by each test scheme, the best scheme is selected from several test schemes as the spraying scheme of the spraying equipment. By measuring the film thickness value, the paint application rate between each parameter scheme can be compared, thereby screening out the best spraying parameter scheme, improving the method for calculating the paint application rate, and reducing the workload and cost of the verification process.

Description

Technical Field

[0001] The present invention relates to the field of spraying technology, and in particular to a method for determining spraying parameters, a spraying method and a spraying device. Background Art

[0002] In the automobile production process, the painting process can improve the corrosion resistance of the car body and support the beautiful appearance of the car body. In order to obtain an excellent and stable car body appearance, all vehicle manufacturers use painting robots to paint the car body, especially the spraying operation of the topcoat of the car. The paint coating rate is the ratio of the amount of paint applied to the object to be coated during the coating process to the total amount of paint actually spit out. At present, the paint coating rate calculation method for specific equipment in the industry on specific workpieces requires wrapping the workpiece with tin foil and tape. Weigh the initial weight of the tin foil and tape and the weight of the remaining tin foil and tape after the workpiece is wrapped in the whole vehicle. Subtract the two to get the mass of the tin foil and tape used to wrap the workpiece. Spray the workpiece wrapped in tin foil, weigh the tin foil and tape removed from the workpiece, and then use the paint consumption statistical software / weighing method to check the volume of paint used when spraying the workpiece, calculate the mass of the consumed paint, and calculate the paint coating rate through the formula based on the calculated multiple mass values.

[0003] The traditional method for determining the paint application rate is cumbersome. In the process of optimizing the paint application rate, the spraying parameters need to be adjusted many times, which means that the above steps need to be repeated many times for verification. The painting effect is poor, the verification cost is high, the workload is huge, and a huge amount of manpower and material resources are consumed. Summary of the invention

[0004] The present invention provides a method for determining spraying parameters, a spraying method and a device, which improves the method for calculating the paint application rate, can quickly determine the optimal spraying parameter scheme, reduce the workload, and save the cost of the verification process.

[0005] A first aspect of the present invention provides a method for determining spraying parameters, comprising:

[0006] Spraying the spray plate based on a plurality of preset spray parameter schemes;

[0007] According to the total film thickness value and spray width curve of each spray parameter scheme, several test schemes are selected;

[0008] spraying the workpiece based on the several test schemes;

[0009] According to the film thickness value of each test scheme, the best scheme is selected;

[0010] The optimal solution is determined as the spraying solution of the spraying equipment.

[0011] The present invention presets multiple spray parameter schemes. In order to reduce system errors, each spray parameter scheme corresponds to several spray width plates for spraying. According to the total film thickness value and the spray width curve calculated by each spray parameter scheme, several test schemes with better effects are screened out from the preset schemes, and the screened test schemes are sprayed on the workpiece. According to the film thickness values ​​calculated by each test scheme, the scheme with the best effect is selected from several test schemes as the spraying scheme of the spraying equipment. By measuring the film thickness value, the paint application rate of each parameter scheme can be compared, thereby screening out the optimal spray scheme, thereby improving the method for finding the optimal spray scheme.

[0012] Furthermore, the total film thickness value and spray width curve of each spray parameter scheme are calculated based on the film thickness value of the measuring point, specifically:

[0013] Measuring the film thickness value of each measuring point on the spray width plate after spraying for each spray parameter scheme; wherein each spray parameter scheme corresponds to a plurality of spray width plates, and a plurality of measuring points of the same number are set on each spray width plate according to a preset spacing;

[0014] The average value of the total film thickness values ​​of several spray width plates corresponding to each spray parameter scheme is taken as the total film thickness value of each spray parameter scheme; wherein the total film thickness value of each spray width plate is obtained by adding the film thickness values ​​of each measuring point on the same spray width plate;

[0015] According to the film thickness value and the position of each measuring point on the same spray width plate, the spray width curve of each spray parameter scheme is drawn.

[0016] The present invention measures the film thickness value of a spray width plate. In order to reduce errors, a plurality of measuring points are selected on the spray width plate, each measuring point is spaced at the same distance, and the number of measuring points on each spray width plate is the same. The total film thickness value of the spray width plate can be obtained by adding the film thickness value of each measuring point. A spray width curve can be drawn according to all film thickness values ​​measured on the spray width plate. The total film thickness value and the spray width curve are used as the basis for screening the optimal spray parameter scheme, thereby improving the accuracy of screening the optimal parameter scheme.

[0017] Furthermore, according to the total film thickness value and spray width curve of each spraying parameter scheme, several test schemes are screened out, specifically:

[0018] Compare the total film thickness values ​​of each spraying parameter scheme;

[0019] Select several spraying parameter schemes whose total film thickness values ​​are greater than the preset film thickness value as preliminary test schemes;

[0020] Several preliminary test plans that meet the preset curve standard are determined as test plans.

[0021] The present invention comprehensively considers the total film thickness value of each parameter scheme, thereby screening out a spraying parameter scheme with a larger total film thickness value, so that the screened spraying parameter scheme is sprayed on the workpiece, and further verification is conducted to find out the spraying parameter scheme with the best painting effect, thereby improving the painting rate.

[0022] Furthermore, the film thickness value of each test scheme is calculated based on the film thickness value of the measuring point, specifically:

[0023] Measuring the film thickness value of each measuring point on the workpiece after spraying for each test scheme; wherein each test scheme corresponds to a workpiece, and a plurality of measuring points of the same number are set on each workpiece according to a preset spacing;

[0024] The average value of the film thickness values ​​at each measuring point on the same workpiece is taken as the film thickness value of each test scheme;

[0025] The film thickness variance of each test scheme is calculated based on the film thickness values ​​of each measuring point on the same workpiece.

[0026] The present invention sets a plurality of measuring points on the workpiece according to a preset interval, so as to measure a plurality of film thickness values ​​on one workpiece. In order to reduce the system error, the average value and the film thickness variance of all the film thickness values ​​on the workpiece are taken, and the film thickness mean value and the film thickness variance are used as the screening basis to screen out the optimal spraying parameters with the highest painting rate, so as to achieve the purpose of achieving the maximum total film thickness value and uniform spraying when painting using the spraying equipment.

[0027] Furthermore, the optimal solution is selected according to the film thickness values ​​of each test solution, specifically:

[0028] Select several test schemes whose film thickness variance is less than the preset variance value as preliminary schemes;

[0029] Compare the film thickness values ​​of each preparation scheme;

[0030] Determine the solution with the largest film thickness value among the preliminary solutions as the optimal solution.

[0031] The present invention calculates the mean film thickness and the film thickness variance of each workpiece based on the film thickness values ​​measured on each workpiece. When selecting the test scheme with the best painting effect, the mean film thickness and the film thickness variance of each workpiece are comprehensively considered to ensure that a parameter scheme with the maximum total film thickness value and the best uniformity can be selected.

[0032] The present invention provides a method for determining spraying parameters, which presets multiple spraying parameter schemes. In order to reduce system errors, each spraying parameter scheme corresponds to a plurality of spray width plates for spraying, and according to the total film thickness value and the spray width curve calculated by each spraying parameter scheme, a plurality of test schemes with better effects are screened out from the preset schemes, and the screened out test schemes are sprayed on a workpiece, and according to the film thickness values ​​calculated by each test scheme, a scheme with the best effect is selected from a plurality of test schemes as the spraying scheme of the spraying equipment, and the paint application rates between the various parameter schemes can be compared by measuring the film thickness value, thereby screening out the best spraying parameter scheme, improving the method for calculating the paint application rate, and reducing the workload and cost of the verification process.

[0033] A second aspect of the present invention provides a spraying method, which is applicable to a spraying device; the spraying method comprises:

[0034] Determine a spraying scheme of the spraying equipment according to the method for determining the spraying parameters of the first aspect;

[0035] Control the spraying equipment to spray the object to be sprayed according to the determined spraying plan.

[0036] The invention provides a spraying method. After determining a spraying parameter scheme of a spraying device, the spraying parameter scheme is used to spray an object to be sprayed, thereby improving the painting rate and the uniformity of the painting.

[0037] A third aspect of the present invention provides a device for determining spraying parameters, comprising: a first spraying module, a first screening module, a second spraying module, a second screening module and a determining module;

[0038] The first spraying module is used to spray the spray plate based on a plurality of preset spraying parameter schemes;

[0039] The first screening module is used to screen out several test schemes according to the total film thickness value and spray width curve of each spray parameter scheme;

[0040] The second spraying module is used to spray the workpiece based on the several test schemes;

[0041] The second screening module is used to screen out the best solution according to the film thickness values ​​of each test solution;

[0042] The determination module is used to determine the optimal solution as the spraying solution of the spraying equipment.

[0043] Further, the first screening module includes: a first comparison unit, a first selection unit and a first determination unit;

[0044] The first comparison unit is used to compare the total film thickness values ​​of each spraying parameter scheme;

[0045] The first selection unit is used to select a number of spraying parameter schemes whose total film thickness values ​​are greater than a preset film thickness value as preliminary test schemes;

[0046] The first determining unit is used to determine a number of preliminary test schemes that meet a preset curve standard as test schemes.

[0047] Further, the second screening module includes: a second selection unit, a second comparison unit and a second determination unit;

[0048] The second selection unit is used to select a number of test schemes whose film thickness variance is less than a preset variance value as preliminary schemes;

[0049] The second comparison unit is used to compare the film thickness values ​​of each preliminary scheme;

[0050] The second determination unit is used to determine that the solution with the largest film thickness value among the preliminary solutions is the optimal solution.

[0051] The present invention provides a device for determining spraying parameters. The device is based on the organic combination of modules, improves the method for calculating the paint application rate, can quickly determine the optimal spraying parameter scheme, reduce workload, and save the cost of the verification process.

[0052] A fourth aspect of the present invention provides a spraying device, which is applicable to spraying equipment; the spraying device comprises: a scheme determination module and a spraying module;

[0053] The scheme determination module is used to determine the spraying scheme of the spraying equipment according to the method for determining the spraying parameters described in the first aspect;

[0054] The spraying module is used to control the spraying equipment to spray the object to be sprayed according to a determined spraying scheme.

[0055] The present invention provides a spraying device, which is based on the organic combination of modules and sprays the object to be sprayed according to the optimal solution determined in the first aspect, thereby improving the painting rate and the uniformity of the painting. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A schematic flow chart of an embodiment of a method for determining spraying parameters provided by the present invention;

[0057] Figure 2 A schematic structural diagram of an embodiment of a device for determining spraying parameters provided by the present invention;

[0058] Figure 3 A schematic diagram of the spraying effect of the spray plate provided by the present invention;

[0059] Figure 4A schematic diagram of a spray width curve provided by the present invention;

[0060] Figure 5 A schematic diagram of the workpiece spraying effect provided by the present invention;

[0061] Figure 6 A schematic diagram of the spraying parameter scheme provided by the present invention. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] like Figure 1 FIG. 1 is a flow chart of an embodiment of a method for determining spraying parameters provided by the present invention. The method includes steps 101 to 105, and each step is specifically as follows:

[0064] Step 101: spraying a spray plate based on a plurality of preset spray parameter schemes.

[0065] As an example of an embodiment of the present invention, spraying the spray plate requires covering the spray plate with tin foil to ensure the uniformity of the electric field and the spray shape during the spraying process, and then placing the spray plate on the top of the tin foil, setting the spray program and spray parameters, fixing the spray flow rate, and letting the robot spray the spray plate. To reduce the system error in spraying and measurement, three spray plates are made for each spray parameter scheme. Several preset spray parameter schemes are formulated by changing parameters such as rotation speed, shaping pressure, and gun speed through experimental methods such as the control variable method.

[0066] Step 102: Filter out several test schemes according to the total film thickness value and spray width curve of each spray parameter scheme.

[0067] In the embodiment of the present invention, the total film thickness value and the spray width curve of each spray parameter scheme are calculated based on the film thickness value of the measuring point, specifically:

[0068] Measuring the film thickness value of each measuring point on the spray width plate after spraying for each spray parameter scheme; wherein each spray parameter scheme corresponds to a plurality of spray width plates, and a plurality of measuring points of the same number are set on each spray width plate according to a preset spacing;

[0069] The average value of the total film thickness values ​​of several spray width plates corresponding to each spray parameter scheme is taken as the total film thickness value of each spray parameter scheme; wherein the total film thickness value of each spray width plate is obtained by adding the film thickness values ​​of each measuring point on the same spray width plate;

[0070] According to the film thickness value and the position of each measuring point on the same spray width plate, the spray width curve of each spray parameter scheme is drawn.

[0071] In the embodiment of the present invention, several test schemes are screened out according to the total film thickness value and spray width curve of each spray parameter scheme, specifically:

[0072] Compare the total film thickness values ​​of each spraying parameter scheme;

[0073] Select several spraying parameter schemes whose total film thickness values ​​are greater than the preset film thickness value as preliminary test schemes;

[0074] Several preliminary test plans that meet the preset curve standard are determined as test plans.

[0075] As an example of an embodiment of the present invention, the spray plate after spraying needs to be placed in a drying room for drying to ensure that the spray film thickness is measured after the coating on the spray plate is formed into a film. A film thickness meter is used to measure the film thickness at a point every 10 mm on the spray plate and record the measured film thickness. Finally, the total film thickness is summed up to reduce system errors. The total film thickness data of three spray plates sprayed with the same parameters are averaged.

[0076] As an example of an embodiment of the present invention, since the dry film density of the coating after film formation is basically stable, the mass of the coating sprayed on the object is proportional to the volume, that is, the larger the volume, the greater the mass. Figure 3 As shown, it is a schematic diagram of the spraying effect provided by the present invention. The spraying direction is from left to right. The cross section is a cross section perpendicular to the spraying direction. The paint film is a three-dimensional object with the same structure of any cross section. According to mathematical and physical knowledge, the volume is the product of the cross-sectional area and the height. Figure 3 The spray length in the formula is the height, and the cross section is an irregular shape, in which the cross-sectional area is positively correlated with the paint application rate. By measuring the spray film thickness at a specific interval and summing the spray film thickness, the total film thickness value obtained is positively correlated with the cross-sectional area. Figure 4 As shown, it is a schematic diagram of the spraying curve provided by the present invention. The positions and film thicknesses of different measuring points on the spray plate can be plotted with distance as the horizontal coordinate and film thickness as the vertical coordinate. The spray curve can be obtained by calculating the integral of the spray curve. Figure 3 Therefore, when the bottom area (ie height) of the spraying is consistent, the larger the integral, the larger the cross-sectional area, the larger the volume, the larger the mass, and the greater the painting rate.

[0077] Step 103: spraying the workpiece based on the plurality of test schemes.

[0078] Step 104: Filter out the best solution according to the film thickness values ​​of each test solution.

[0079] In the embodiment of the present invention, the film thickness value of each test scheme is calculated based on the film thickness value of the measuring point, specifically:

[0080] Measuring the film thickness value of each measuring point on the workpiece after spraying for each test scheme; wherein each test scheme corresponds to a workpiece, and a plurality of measuring points of the same number are set on each workpiece according to a preset spacing;

[0081] The average value of the film thickness values ​​at each measuring point on the same workpiece is taken as the film thickness value of each test scheme;

[0082] The film thickness variance of each test scheme is calculated based on the film thickness values ​​of each measuring point on the same workpiece.

[0083] In the embodiment of the present invention, the optimal solution is selected according to the film thickness values ​​of each test solution, specifically:

[0084] Select several test schemes whose film thickness variance is less than the preset variance value as preliminary schemes;

[0085] Compare the film thickness values ​​of each preparation scheme;

[0086] Determine the solution with the largest film thickness value among the preliminary solutions as the optimal solution.

[0087] In an embodiment of the present invention, a number of measuring points are set on the workpiece according to a preset interval, so that multiple film thickness values ​​are measured on one workpiece. In order to reduce the system error, the average value and film thickness variance of all film thickness values ​​on the workpiece are taken. When selecting the test scheme with the best painting effect, the film thickness mean and film thickness variance of each workpiece are comprehensively considered to ensure that the parameter scheme with the largest total film thickness value and the best uniformity can be selected.

[0088] As an example of an embodiment of the present invention, Figure 5 As shown, it is a schematic diagram of the spraying effect of the workpiece provided by the present invention. Taking the left rear door of a car door as an example, after spraying on the car door, 1 to 2 columns of measuring points can be selected on the door for measurement, wherein the distance between each measuring point is the same.

[0089] Step 105: Determine the optimal solution as the spraying solution of the spraying equipment.

[0090] As an example of an embodiment of the present invention, Figure 6As shown, it is a schematic diagram of the spraying parameter scheme provided by the present invention. A plurality of spraying parameter schemes are designed by the control variable method. After spraying on the spray plate, 8 groups of parameters with better effects are selected. The 8 groups of parameters are sprayed on the workpieces respectively. By measuring the mean value of the spraying film thickness of the workpiece, it is found that the spraying film thickness mean value of the parameters of scheme 7 is the largest, and the film thickness variance is also small. The total value of the spraying film thickness of the parameters of scheme 7 on the spray plate is the largest, and the shape of the drawn spray curve is also better, so this parameter is selected as the final spraying parameter. Finally, the relative painting rate of this parameter relative to other schemes is improved by 3%-25%, and the relative painting rate of the spraying parameter can be quickly obtained to achieve cost reduction.

[0091] The present invention provides a spraying method, which can confirm the spraying scheme of a spraying device according to the spraying parameter confirmation method provided by the present invention, and control the spraying device to spray a spraying object according to the determined spraying scheme.

[0092] like Figure 2 As shown, the present invention also provides a device for determining spraying parameters, comprising: a first spraying module 201, a first screening module 202, a second spraying module 203, a second screening module 204 and a determining module 205;

[0093] The first spraying module 201 is used to spray the spray plate based on a plurality of preset spraying parameter schemes;

[0094] The first screening module 202 is used to screen out several test schemes according to the total film thickness value and spray width curve of each spray parameter scheme;

[0095] The second spraying module 203 is used to spray the workpiece based on the plurality of test schemes;

[0096] The second screening module 204 is used to screen out the best solution according to the film thickness values ​​of each test solution;

[0097] The determination module 205 is used to determine the optimal solution as the spraying solution of the spraying equipment.

[0098] In the embodiment of the present invention, the first screening module includes: a first comparison unit, a first selection unit and a first determination unit;

[0099] The first comparison unit is used to compare the total film thickness values ​​of each spraying parameter scheme;

[0100] The first selection unit is used to select a number of spraying parameter schemes whose total film thickness values ​​are greater than a preset film thickness value as preliminary test schemes;

[0101] The first determining unit is used to determine a number of preliminary test schemes that meet a preset curve standard as test schemes.

[0102] In the embodiment of the present invention, the second screening module includes: a second selection unit, a second comparison unit and a second determination unit;

[0103] The second selection unit is used to select a number of test schemes whose film thickness variance is less than a preset variance value as preliminary schemes;

[0104] The second comparison unit is used to compare the film thickness values ​​of each preliminary scheme;

[0105] The second determination unit is used to determine that the solution with the largest film thickness value among the preliminary solutions is the optimal solution.

[0106] The present invention also provides a spraying device, which can confirm the spraying scheme of the spraying equipment according to the method for confirming the spraying parameters provided by the present invention, and control the spraying equipment to spray the object to be sprayed according to the determined spraying scheme.

[0107] In summary, the spray parameter determination method, spraying method and device provided in the embodiments of the present invention preset multiple spray parameter schemes. In order to reduce system errors, each spray parameter scheme corresponds to several spray plates for spraying, and the total film thickness value and the spray width curve calculated according to each spray parameter scheme are used to select several test schemes with better effects from the preset schemes. The screened test schemes are sprayed on the workpiece, and the film thickness values ​​calculated for each test scheme are used to select the best scheme from several test schemes as the spraying scheme of the spraying equipment. By measuring the film thickness value, the paint application rates of various parameter schemes can be compared, thereby selecting the optimal spray parameter scheme, improving the method for calculating the paint application rate, and reducing the workload and cost of the verification process.

[0108] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining spraying parameters, characterized in that: include: Spraying the spray plate based on a plurality of preset spray parameter schemes; According to the total film thickness value and spray width curve of each spray parameter scheme, several test schemes are selected; spraying the workpiece based on the several test schemes; According to the film thickness value of each test scheme, the best scheme is selected; Determining the optimal solution as a spraying solution for a spraying device; The total film thickness value and spray width curve of each spray parameter scheme are calculated based on the film thickness value of the measuring point, specifically: Measuring the film thickness value of each measuring point on the spray width plate after spraying for each spray parameter scheme; wherein each spray parameter scheme corresponds to a plurality of spray width plates, and a plurality of measuring points of the same number are set on each spray width plate according to a preset spacing; The average value of the total film thickness values ​​of several spray width plates corresponding to each spray parameter scheme is taken as the total film thickness value of each spray parameter scheme; wherein the total film thickness value of each spray width plate is obtained by adding the film thickness values ​​of each measuring point on the same spray width plate; According to the film thickness value and position of each measuring point on the same spray width plate, the spray width curve of each spray parameter scheme is drawn; According to the film thickness values ​​of each test scheme, the optimal scheme is screened out, specifically: Select several test schemes whose film thickness variance is less than the preset variance value as preliminary schemes; Compare the film thickness values ​​of each preparation scheme; Determine the solution with the largest film thickness value among the preliminary solutions as the optimal solution.

2. The method for determining spraying parameters according to claim 1, characterized in that: According to the total film thickness value and spray width curve of each spray parameter scheme, several test schemes are screened out, specifically: Compare the total film thickness values ​​of each spraying parameter scheme; Select several spraying parameter schemes whose total film thickness values ​​are greater than the preset film thickness value as preliminary test schemes; Several preliminary test plans that meet the preset curve standard are determined as test plans.

3. The method for determining spraying parameters according to claim 1, characterized in that: The film thickness values ​​of each test scheme are calculated based on the film thickness values ​​at the measuring points, specifically: Measuring the film thickness value of each measuring point on the workpiece after spraying for each test scheme; wherein each test scheme corresponds to a workpiece, and a plurality of measuring points of the same number are set on each workpiece according to a preset spacing; The average value of the film thickness values ​​at each measuring point on the same workpiece is taken as the film thickness value of each test scheme; The film thickness variance of each test scheme is calculated based on the film thickness values ​​of each measuring point on the same workpiece.

4. A spraying method, characterized in that: Applicable to spraying equipment; the spraying method includes: Determine the spraying scheme of the spraying equipment according to the method for determining the spraying parameters according to claims 1 to 3; Control the spraying equipment to spray the object to be sprayed according to the determined spraying plan.

5. A device for determining spraying parameters, characterized in that: include: A first spraying module, a first screening module, a second spraying module, a second screening module and a determination module; The first spraying module is used to spray the spray plate based on a plurality of preset spraying parameter schemes; The first screening module is used to screen out several test schemes according to the total film thickness value and spray width curve of each spray parameter scheme; The second spraying module is used to spray the workpiece based on the several test schemes; The second screening module is used to screen out the best solution according to the film thickness values ​​of each test solution; The determination module is used to determine the optimal solution as the spraying solution of the spraying equipment; The total film thickness value and spray width curve of each spray parameter scheme are calculated based on the film thickness value of the measuring point, specifically: Measuring the film thickness value of each measuring point on the spray width plate after spraying for each spray parameter scheme; wherein each spray parameter scheme corresponds to a plurality of spray width plates, and a plurality of measuring points of the same number are set on each spray width plate according to a preset spacing; The average value of the total film thickness values ​​of several spray width plates corresponding to each spray parameter scheme is taken as the total film thickness value of each spray parameter scheme; wherein the total film thickness value of each spray width plate is obtained by adding the film thickness values ​​of each measuring point on the same spray width plate; According to the film thickness value and position of each measuring point on the same spray width plate, the spray width curve of each spray parameter scheme is drawn; The second screening module includes: a second selection unit, a second comparison unit and a second determination unit; The second selection unit is used to select a number of test schemes whose film thickness variance is less than a preset variance value as preliminary schemes; The second comparison unit is used to compare the film thickness values ​​of each preliminary scheme; The second determination unit is used to determine that the solution with the largest film thickness value among the preliminary solutions is the optimal solution.

6. The device for determining spraying parameters according to claim 5, characterized in that: The first screening module includes: a first comparison unit, a first selection unit and a first determination unit; The first comparison unit is used to compare the total film thickness values ​​of each spraying parameter scheme; The first selection unit is used to select a number of spraying parameter schemes whose total film thickness values ​​are greater than a preset film thickness value as preliminary test schemes; The first determining unit is used to determine a number of preliminary test schemes that meet a preset curve standard as test schemes.

7. A spraying device, characterized in that: Suitable for spraying equipment; The spraying device comprises: a scheme determination module and a spraying module; The scheme determination module is used to determine the spraying scheme of the spraying equipment according to the method for determining the spraying parameters according to claims 1 to 3; The spraying module is used to control the spraying equipment to spray the object to be sprayed according to a determined spraying scheme.

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