Automatic spraying method for radiator workpiece

Abstract

The invention relates to the technical field of spraying equipment, and discloses an automatic spraying method for a radiator workpiece, which comprises the following steps of: 1, triggering detection of an initial position of the radiator workpiece; step 2, data acquisition and transmission; 3, calculating and determining parameters; fourthly, spraying implementation is automatically conducted according to the planned path; and fifthly, spraying is finished. According to the automatic spraying method for the radiator workpiece, accurate measurement of the radiator workpiece is achieved through a grating module, a reliable basis is provided for determination of spraying parameters, then the radiator workpiece is stopped in a spraying area, the spraying parameters are set and calculated according to reciprocating motion parameters, and the automatic spraying of the radiator workpiece is achieved. Only the spray gun row group is controlled to move and perform spraying operation in the spraying area according to the preset track, the spraying route is optimized, radiator workpieces in different shapes are accurately sprayed, the application range is wide, waste of paint is reduced, the radiator workpieces are uniformly sprayed, manual operation is reduced in the automatic spraying process, the production period is short, and the overall production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of spraying equipment, in particular to an automatic spraying method for a radiator workpiece. Background Art

[0002] The spraying process is crucial in the radiator manufacturing process. Traditional spraying processes often rely on manual experience and intuitive judgment, making it difficult to ensure uniformity and accuracy, which in turn affects the heat dissipation efficiency and service life of the radiator.

[0003] In order to solve this technical problem, some existing radiator spraying processes mostly use a fixed path or preset parameter spraying method, but the radiator workpiece is prone to uneven spray coverage due to shape differences or installation deviations. For example, patent application number CN202222952037.7 discloses a surface spraying device for a radiator fin. The working principle of the surface spraying device for the radiator fin is as follows: when spraying the radiator fin, the radiator fin is placed between two groups of fixed plates on the 6 sides of two connecting plates, and then the solenoid valves of the air guide pipes connected to each cylinder are connected to the power supply, so that the movable end of the cylinder drives each second connecting seat to move, so that the second connecting seat drives the clamping plate to move, so that the clamping plate rotates with the inside of the third connecting seat as the center, so that the two groups of clamping plates rotate relative to each other, and the radiator fin is clamped between the two groups of fixed plates. The radiator fin is fixed on a fixed plate, and then the sprayer is connected to a power source to spray the paint onto the surface of the radiator fin through the nozzle, and then the electric slide is controlled to drive the slider to move the nozzle, and the radiator fin is sprayed through the nozzle. When the radiator fin needs to be rotated, the motor is connected to a power source so that the output shaft of the motor drives the second gear to rotate, and the second gear drives the first gear to rotate through the teeth on the outer surface, and the first gear drives one of the movable shafts to rotate so that the movable shaft drives the clamping plate to rotate through the connecting plate, and the clamping plate drives the radiator fin to rotate, and then the surface of the radiator fin is continued to be sprayed. However, the surface spraying device of the radiator fin places the radiator fin between two sets of fixed plates on the surfaces of two connecting plates, and adopts a fixed path or preset parameter spraying method to spray the radiator fin. It is easy to cause uneven spray coverage for radiators with shape differences or installation deviations, which is not conducive to the high-quality production of radiators. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problems of the prior art and provide an automatic spraying method for a radiator workpiece.

[0005] In order to achieve the above object, the present invention adopts the following scheme:

[0006] An automatic spraying method for a radiator workpiece comprises the following steps:

[0007] Step 1: Trigger detection of the initial position of the radiator workpiece:

[0008] The radiator workpiece is controlled to move until it initially touches the data acquisition area, triggering the grating detection module to start detection. This step design ensures the precise positioning of the workpiece before spraying, laying a solid foundation for subsequent steps.

[0009] Step 2: Data collection and transmission:

[0010] The receiving grating detection module collects the horizontal data, vertical data and the shape of the radiator workpiece in the data collection area; among them, the horizontal data includes the length of the blank area in front of the grating, the length of the workpiece entity, and the length of the blank area behind the grating; the vertical data includes the height of the blank area above the grating, the height of the workpiece entity, and the height of the blank area below the grating; in this step design, the grating detection module starts working, collecting the horizontal data, vertical data and the shape of the radiator workpiece in the data collection area, and then feeding back to the spray control system. The horizontal data and vertical data can provide an accurate basis for subsequent parameter calculations.

[0011] Step 3: Parameter calculation and determination:

[0012] Based on the horizontal data, vertical data and the shape of the radiator workpiece, the spraying area, the reciprocating movement parameters of the spray gun group in the spraying area along the movement direction of the radiator workpiece, and the spraying parameters are calculated; this step is the key to ensuring spraying accuracy.

[0013] Step 4: Automatically spray according to the planned path:

[0014] Control the movement of the radiator workpiece into the set position of the spraying area and stop;

[0015] And control the spray gun array to move back and forth in the spraying area along the moving direction of the radiator workpiece according to the reciprocating movement parameters determined above, and control the spray gun array to move up and down to spray the radiator workpiece according to the set spraying parameters and the above-mentioned inferred spraying parameters; in this step, first stop the radiator workpiece in the spraying area, and the spray control system controls the spray gun array to move in the spraying area according to the preset trajectory according to the reciprocating movement parameters, set spraying parameters, and inferred spraying parameters of the spray gun array, and performs the spraying operation. The whole process is highly automated and does not require human intervention. It only requires adjusting the movement of the mobile spray gun array to achieve the spraying of the radiator workpiece, which greatly improves the spraying efficiency and consistency, and sprays on a precise route, making the spraying more uniform.

[0016] Step 5: After spraying is completed, the radiator workpiece is controlled to move out of the spraying area.

[0017] Furthermore, the data collection area has a length of 200-3500 mm and a height of 300-4200 mm.

[0018] Furthermore, the spraying area is specifically:

[0019] When the distance from the front end of the radiator workpiece to the central axis of the spray gun at the rear end is equal to the length of the blank area in front of the grating, the spray length side formed by the length of the blank area in front of the grating, the length of the workpiece entity, and the length of the spray gun group, and the spray height side formed by the height of the blank area above the grating, the height of the workpiece entity, and the height of the blank area below the grating, the spray length side and the spray height side are enclosed to form an area frame as the spray area;

[0020] The reciprocating movement parameters of the spray gun array in the spraying area along the moving direction of the radiator workpiece include a movement speed v1 corresponding to the length of the blank area in front of the grating, a movement speed v2 corresponding to the length of the workpiece entity, and a movement speed v3 corresponding to the length of the blank area behind the grating.

[0021] Furthermore, the moving speed v1 is 1.0-3.0 m / min; the moving speed v2 is 0.1-0.5 m / min; and the moving speed v3 is 1.0-3.0 m / min.

[0022] Furthermore, the moving speed v1 is the same as the moving speed v3.

[0023] Furthermore, the estimated spraying parameters include the number of spray gun arrays that need to be operated and their corresponding positions, the stroke of the spray gun array moving up and down, and the initial spraying position of the spray gun array;

[0024] The set spray parameters include the total number of spray gun groups, the distance between adjacent upper and lower rows of spray gun groups, the spray coverage range of adjacent upper and lower rows of spray gun groups, the up and down movement speed of the spray gun groups, the distance between the spray gun nozzle naturally perpendicular to the radiator workpiece, the nozzle diameter of the spray gun, the powder output speed of the spray gun, the pitch angle of the spray gun, and the atomization pressure of the spray gun.

[0025] Furthermore, the number of spray gun rows that need to be operated and their corresponding positions are determined according to the height of the blank area above the grating, the height of the workpiece entity, the height of the blank area below the grating, the distance between the adjacent upper and lower rows of spray gun rows, and the spray coverage range of the adjacent upper and lower rows of spray gun rows;

[0026] The up and down movement of the spray gun array is determined according to the physical height of the workpiece and the number of times of up and down reciprocating spraying;

[0027] The initial position of the spray gun group spraying is determined according to the front end position of the workpiece entity length.

[0028] Furthermore, the spray coverage range of the two adjacent upper and lower rows of spray guns is 0-50 mm; and the distance between the nozzles of the spray guns and the radiator workpiece is naturally perpendicular to 100-250 mm.

[0029] Furthermore, the control unit controls the movement of the radiator workpiece into a set position in the spraying area and stops;

[0030] And control the spray gun array group to move back and forth in the spraying area along the moving direction of the radiator workpiece according to the reciprocating movement parameters determined above, and control the spray gun array group to move up and down to spray the radiator workpiece according to the set spraying parameters and the above-calculated spraying parameters; the specific steps are as follows:

[0031] S1. When the distance from the front end of the radiator workpiece to the center axis of the rear end of the spray gun is equal to the length of the blank area in front of the grating, the radiator workpiece is controlled to stop moving;

[0032] S2, control the spray gun group to move in the opposite direction of the radiator workpiece at a moving speed v1, and move a distance equal to the length of the blank area in front of the grating to reach the front end position of the radiator workpiece;

[0033] S3, control the spray gun array to move in the opposite direction of the movement of the radiator workpiece at a moving speed v2, and the moving distance is the sum of the workpiece physical length and the length of the spray gun array; and control the spray gun array to move up and down to spray the radiator workpiece according to the set spraying parameters and the above-mentioned calculated spraying parameters.

[0034] Furthermore, after the spraying is completed, the specific steps of controlling the radiator workpiece to move out of the spraying area are as follows:

[0035] When the spray gun array moves in the opposite direction of the movement of the radiator workpiece and reaches the sum of the length of the workpiece entity and the length of the spray gun array, the spray gun array is controlled to stop spraying and reset along the direction of the movement of the radiator workpiece at a moving speed v3, and the spraying ends;

[0036] And control the movement of the radiator workpiece out of the spraying area, and subsequently perform surface inspection, manual re-spraying, manual cooling and quality assessment on the radiator workpiece.

[0037] Compared with the existing technology, the present invention has the following advantages:

[0038] The present invention sequentially triggers detection of the initial position of the radiator workpiece, collects and transmits data, calculates and determines parameters, automatically sprays according to the planned path, and controls the radiator workpiece to move out of the spraying area after the spraying is completed. The grating module is used to achieve accurate measurement of the radiator workpiece, which provides a reliable basis for determining the spraying parameters. The radiator workpiece is then stopped in the spraying area, and according to the reciprocating movement parameters, the spraying parameters are set and the spraying parameters are calculated, only the spray gun group is controlled to move in the spraying area according to the preset trajectory, and the spraying operation is performed, the spraying route is optimized, the route is sprayed accurately, and radiator workpieces of different shapes are accurately sprayed. The application range is wide, the waste of paint is reduced, the radiator workpiece is sprayed evenly, and the production cost is reduced. In addition, the automated spraying process reduces manual operation, shortens the production cycle, and improves the overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present application will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0040] Figure 1 It is a flow chart of the automatic spraying method for a radiator workpiece of the present invention.

[0041] Figure 2 It is a schematic diagram of the heat sink workpiece of the present invention moving into the data acquisition area to be detected by the grating detection module.

[0042] Figure 3 It is a schematic diagram of the radiator workpiece of the present invention when it stops in the spraying area and is ready to be sprayed.

[0043] Figure 4 This is a schematic diagram of the spray gun arrangement of the present invention when it starts spraying a radiator workpiece.

[0044] Figure 5 This is a schematic diagram of the spray gun arrangement of the present invention when spraying the radiator workpiece has just stopped. DETAILED DESCRIPTION

[0045] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0046] like Figures 1 to 5As shown, a method for automatically spraying radiator workpieces is implemented using a workpiece spraying system. The workpiece spraying system includes a spraying control system, a first workpiece conveyor line, a second workpiece conveyor line, a grating detection module, a wireless communication module, a spray gun lifting reciprocator for lifting and adjusting the vertical position of a spray gun array, and a spray gun traversing reciprocator for driving the spray gun array to reciprocate within the spraying area along the direction of movement of the radiator workpiece. The first workpiece conveyor line conveys the radiator workpiece through a data acquisition area, and the second workpiece conveyor line conveys the radiator workpiece through the spraying area. The grating detection module is wirelessly connected to the spraying control system via the wireless communication module. The spraying control system is electrically connected to the first workpiece conveyor line, the second workpiece conveyor line, the spray gun lifting reciprocator, and the spray gun traversing reciprocator. The spray gun array consists of a plurality of spray guns arranged horizontally in a row and mounted on the spray gun lifting reciprocator. The spray gun lifting reciprocator is mounted on the spray gun traversing reciprocator to achieve lateral movement of the spray gun lifting reciprocator and the spray gun array. The method for automatically spraying radiator workpieces includes the following steps:

[0047] Step 1: Trigger detection of the initial position of the radiator workpiece;

[0048] The radiator workpiece is controlled to move until it initially touches the data acquisition area, triggering the grating detection module to initiate detection. The data acquisition area is 200-3500mm long, preferably 2000mm, and 300-4200mm high, preferably 3200mm. This step ensures precise positioning of the workpiece before spraying, laying a solid foundation for subsequent steps.

[0049] Step 2: Data collection and transmission;

[0050] The receiving grating detection module collects the horizontal data, vertical data and the shape of the radiator workpiece in the data collection area; Figure 2 As shown, the data acquisition area is denoted as SA. Horizontal data includes the length of the blank area in front of the grating, the length of the workpiece, and the length of the blank area behind the grating, denoted as L1, L2, and L3, respectively. Vertical data includes the height of the blank area above the grating, the height of the workpiece, and the height of the blank area below the grating, denoted as H1, H2, and H3, respectively. In this step, the grating detection module begins operation, collecting horizontal and vertical data within the data acquisition area, as well as the shape of the radiator workpiece. This data is then fed back to the spray control system. These horizontal and vertical data provide an accurate basis for subsequent parameter calculations.

[0051] Step 3: Parameter calculation and determination;

[0052] Based on the horizontal data, vertical data and the shape of the radiator workpiece, the spraying area, the reciprocating movement parameters of the spray gun group in the spraying area along the movement direction of the radiator workpiece, and the spraying parameters are calculated; this step is the key to ensuring spraying accuracy.

[0053] Specifically, the spraying area is: when the distance from the front end of the radiator workpiece to the central axis of the spray gun at the rear end is equal to the length of the blank area in front of the grating, the spraying length side formed by the length of the blank area in front of the grating, the length of the workpiece entity, and the length of the spray gun group, and the spraying height side formed by the height of the blank area above the grating, the height of the workpiece entity, and the height of the blank area below the grating, the spraying length side and the spraying height side are enclosed to form an area frame as the spraying area; wherein, if Figures 3 to 5 As shown in the figure, the spraying area is marked as SB and the length of the spray gun group is marked as L4. This design of the spraying area facilitates the precise spraying of radiator workpieces of different shapes by the spray gun group. It has a wide range of applications, reduces paint waste, sprays radiator workpieces evenly, and reduces production costs. In addition, the automated spraying process reduces manual operation, shortens the production cycle, and improves overall production efficiency.

[0054] The reciprocating movement parameters of the spray gun array in the spraying area along the moving direction of the radiator workpiece include the moving speed v1 corresponding to the length of the blank area in front of the grating, the moving speed v2 corresponding to the physical length of the workpiece, and the moving speed v3 corresponding to the length of the blank area behind the grating, and the moving speed v1, the moving speed v2 and the moving speed v3 are limited to the set range, that is, the moving speed v1 is 1.0-3.0m / min; the moving speed v2 is 0.1-0.5m / min; the moving speed v3 is 1.0-3.0m / min.

[0055] In addition, the estimated spraying parameters include the number of spray gun groups that need to work and their corresponding positions, the stroke of the spray gun group moving up and down, and the initial position of the spray gun group spraying;

[0056] Specifically, the number of spray gun arrays that need to work and their corresponding positions are determined based on the height of the blank area on the grating, the physical height of the workpiece, the height of the blank area below the grating, the distance between the adjacent upper and lower rows of spray gun arrays, and the spray coverage range of the adjacent upper and lower rows of spray gun arrays; the up and down movement stroke of the spray gun array is determined based on the physical height of the workpiece and the number of up and down reciprocating spraying times set; the initial position of the spray gun array spraying is determined based on the front end position of the physical length of the workpiece.

[0057] The initial spraying position of the spray gun array is determined by the front end position of the workpiece's physical length. Referring to the shape of the radiator workpiece, the initial spraying position of the spray gun array is determined when the spray gun array moves at a speed v1 in the opposite direction of the radiator workpiece's movement, and moves a distance equal to the length of the blank area in front of the grating, reaching the front end position of the radiator workpiece. In other words, when the central axis of the spray gun at the rear end of each row reaches the front end position of the radiator workpiece, the spray gun array reaches the front end position of the radiator workpiece.

[0058] The set spraying parameters include the total number of spray gun groups, the distance between the adjacent upper and lower rows of spray gun groups, the spray coverage range of the adjacent upper and lower rows of spray gun groups, the up and down movement speed of the spray gun group, the distance between the spray gun nozzle and the radiator workpiece, the nozzle diameter of the spray gun, the powder output speed of the spray gun, the pitch angle of the spray gun, and the atomization pressure of the spray gun. Specifically, the total number of spray gun groups can be 6-10 rows. Of course, the total number of spray gun groups can be reasonably set according to demand. The spray coverage range of the adjacent upper and lower rows of spray gun groups is 0-50mm; the distance between the spray gun nozzle and the radiator workpiece is 100-250mm. As for the distance between the adjacent upper and lower rows of spray gun groups, the up and down movement speed of the spray gun group, the nozzle diameter of the spray gun, the powder output speed of the spray gun, the pitch angle of the spray gun, and the atomization pressure of the spray gun, they are all reasonably set according to demand, which is the same as the existing conventional technology.

[0059] Step 4: Automatically spray according to the planned path;

[0060] Control the movement of the radiator workpiece into the set position of the spraying area and stop;

[0061] And control the spray gun array group to move back and forth in the spraying area along the moving direction of the radiator workpiece according to the reciprocating movement parameters determined above, and control the spray gun array group to move up and down to spray the radiator workpiece according to the set spraying parameters and the above-calculated spraying parameters; the specific steps are as follows:

[0062] S1. When the distance from the front end of the radiator workpiece to the center axis of the rear end of the spray gun is equal to the length of the blank area in front of the grating, the radiator workpiece is controlled to stop moving;

[0063] S2, control the spray gun group to move in the opposite direction of the radiator workpiece at a moving speed v1, and move a distance equal to the length of the blank area in front of the grating to reach the front end position of the radiator workpiece;

[0064] S3. Control the spray gun array to move in the opposite direction of the movement of the radiator workpiece at a moving speed v2. The moving distance is the sum of the physical length of the workpiece and the length of the spray gun array. At the same time, during the horizontal movement of the spray gun array over this distance, control the spray gun array to move up and down to spray the radiator workpiece according to the set spraying parameters and the above-mentioned inferred spraying parameters.

[0065] In this step, the radiator workpiece is first positioned within the spraying area. The spray control system then controls the spray guns according to the reciprocating movement parameters, the set spray parameters, and the calculated spray parameters. This system then controls the movement of the spray guns within the spraying area along a preset trajectory, and the spraying operation is performed. The entire process is highly automated, requiring no human intervention. Simply adjusting the movement of the mobile spray guns to coat the radiator workpiece significantly improves spraying efficiency and consistency, ensuring precise spraying and a more uniform coating.

[0066] Step 5: After spraying is completed, the radiator workpiece is controlled to move out of the spraying area. The specific steps are:

[0067] When the spray gun array moves in the opposite direction of the movement of the radiator workpiece and reaches the sum of the length of the workpiece entity and the length of the spray gun array, the spray gun array is controlled to stop spraying and reset along the direction of the movement of the radiator workpiece at a moving speed v3, and the spraying ends;

[0068] And control the movement of the radiator workpiece out of the spraying area, and subsequently perform surface inspection, manual re-spraying, manual cooling and quality assessment on the radiator workpiece.

[0069] Preferably, the moving speed v1 is the same as the moving speed v3. The moving speed v1 and the moving speed v3 are used as the moving speeds when not spraying, and can be set to the same speed for movement according to needs.

[0070] Preferably, the speed of the moving speed v2 corresponding to the workpiece entity length can also be reasonably adjusted and determined according to the number of spray gun groups that need to work. If the number of spray gun groups that need to work is large, the moving speed v2 corresponding to the workpiece entity length can be appropriately slowed down. Mainly, the more spray gun groups that need to work, the tighter the coverage range, and the moving speed v2 corresponding to the workpiece entity length can be selected as a slow speed within the set range. Specifically, the number of spray gun groups that need to work can be determined based on the workpiece entity height and the distance between the adjacent upper and lower rows of spray gun groups. At this time, the number of spray gun groups that need to work is a standard quantity. On this basis, because the spray coverage range and moving speed v2 of the adjacent upper and lower rows of spray gun groups are both intervals, it is appropriate to add 1-2 rows of spray gun groups to the standard quantity, and the moving speed v2 can be appropriately reduced by 0.1-0.2m / min on the basis of being able to reduce the speed.

[0071] In summary, an embodiment of the present invention provides an automatic spraying method for a radiator workpiece, wherein the automatic spraying method for the radiator workpiece sequentially undergoes trigger detection of the initial position of the radiator workpiece, data collection and transmission, parameter calculation and determination, automatic spraying according to the planned path, and controlling the radiator workpiece to move out of the spraying area after the spraying is completed. The grating module is used to achieve accurate measurement of the radiator workpiece, providing a reliable basis for determining the spraying parameters, and then the radiator workpiece is stopped in the spraying area, and according to the reciprocating movement parameters, the spraying parameters are set, and the spraying parameters are calculated, only the spray gun array is controlled to move in the spraying area according to the preset trajectory, and the spraying operation is performed, the spraying route is optimized, the route is sprayed accurately, and radiator workpieces of different shapes are accurately sprayed. It has a wide range of applications, reduces paint waste, sprays the radiator workpiece evenly, reduces production costs, and the automated spraying process reduces manual operations, shortens the production cycle, and improves overall production efficiency.

[0072] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present application. These improvements and replacements should also be regarded as the scope of protection of the present application.

Claims

1. An automatic spraying method for a radiator workpiece, characterized in that: The steps include: Step 1: Trigger detection of the initial position of the radiator workpiece: Control the movement of the radiator workpiece to initially touch the data acquisition area, triggering the grating detection module to start detection; Step 2: Data collection and transmission: The receiving grating detection module collects horizontal data, vertical data and the shape of the radiator workpiece in the data collection area; wherein the horizontal data includes the length of the blank area in front of the grating, the length of the workpiece entity, and the length of the blank area behind the grating; the vertical data includes the height of the blank area above the grating, the height of the workpiece entity, and the height of the blank area below the grating; Step 3: Parameter calculation and determination: Determine the spraying area and the reciprocating movement parameters of the spray gun group in the spraying area along the moving direction of the radiator workpiece according to the horizontal data, vertical data and the shape of the radiator workpiece, and calculate the spraying parameters; Step 4: Automatically spray according to the planned path: Control the movement of the radiator workpiece into the set position of the spraying area and stop; and controlling the spray gun array to reciprocate in the spraying area along the moving direction of the radiator workpiece according to the reciprocating movement parameters determined above, and controlling the spray gun array to move up and down to spray the radiator workpiece according to the set spraying parameters and the above-calculated spraying parameters; Step 5: After spraying is completed, the radiator workpiece is controlled to move out of the spraying area.

2. The automatic spraying method for a radiator workpiece according to claim 1, characterized in that: The data acquisition area has a length of 200-3500 mm and a height of 300-4200 mm.

3. The automatic spraying method for a radiator workpiece according to claim 1, characterized in that: The spraying area is specifically: When the distance from the front end of the radiator workpiece to the central axis of the spray gun at the rear end is equal to the length of the blank area in front of the grating, the spray length side formed by the length of the blank area in front of the grating, the physical length of the workpiece, and the length of the spray gun group, and the spray height side formed by the height of the blank area above the grating, the physical height of the workpiece, and the height of the blank area below the grating, are enclosed by the spray length side and the spray height side to form an area frame as the spraying area.

4. The automatic spraying method for a radiator workpiece according to claim 3, characterized in that: The reciprocating movement parameters of the spray gun array in the spraying area along the moving direction of the radiator workpiece include a movement speed v1 corresponding to the length of the blank area in front of the grating, a movement speed v2 corresponding to the length of the workpiece entity, and a movement speed v3 corresponding to the length of the blank area behind the grating.

5. The automatic spraying method for a radiator workpiece according to claim 4, characterized in that: The moving speed v1 is 1.0-3.0 m / min; the moving speed v2 is 0.1-0.5 m / min; and the moving speed v3 is 1.0-3.0 m / min.

6. The automatic spraying method for a radiator workpiece according to claim 4, characterized in that: The estimated spraying parameters include the number of spray gun groups that need to be worked and their corresponding positions, the stroke of the spray gun group moving up and down, and the initial position of the spray gun group spraying; The set spray parameters include the total number of spray gun groups, the distance between adjacent upper and lower rows of spray gun groups, the spray coverage range of adjacent upper and lower rows of spray gun groups, the up and down movement speed of the spray gun groups, the distance between the spray gun nozzle naturally perpendicular to the radiator workpiece, the nozzle diameter of the spray gun, the powder output speed of the spray gun, the pitch angle of the spray gun, and the atomization pressure of the spray gun.

7. The automatic spraying method for a radiator workpiece according to claim 6, characterized in that: The number of spray gun rows that need to be operated and their corresponding positions are determined according to the height of the blank area above the grating, the height of the workpiece entity, the height of the blank area below the grating, the distance between the adjacent upper and lower rows of spray gun rows, and the spray coverage range of the adjacent upper and lower rows of spray gun rows; The up and down movement of the spray gun array is determined according to the physical height of the workpiece and the number of times of up and down reciprocating spraying; The initial position of the spray gun group spraying is determined according to the front end position of the workpiece entity length.

8. The automatic spraying method for a radiator workpiece according to claim 6, characterized in that: The spray coverage range of the two adjacent upper and lower rows of spray guns is 0-50 mm; the distance between the nozzles of the spray guns and the radiator workpiece is naturally 100-250 mm.

9. The automatic spraying method for a radiator workpiece according to claim 4, characterized in that: The control unit moves the radiator workpiece into a set position in the spraying area and stops; And control the spray gun array group to move back and forth in the spraying area along the moving direction of the radiator workpiece according to the reciprocating movement parameters determined above, and control the spray gun array group to move up and down to spray the radiator workpiece according to the set spraying parameters and the above-calculated spraying parameters; the specific steps are as follows: S1. When the distance from the front end of the radiator workpiece to the center axis of the rear end of the spray gun is equal to the length of the blank area in front of the grating, the radiator workpiece is controlled to stop moving; S2, control the spray gun group to move in the opposite direction of the radiator workpiece at a moving speed v1, and move a distance equal to the length of the blank area in front of the grating to reach the front end position of the radiator workpiece; S3, control the spray gun array to move in the opposite direction of the movement of the radiator workpiece at a moving speed v2, and the moving distance is the sum of the workpiece physical length and the length of the spray gun array; and control the spray gun array to move up and down to spray the radiator workpiece according to the set spraying parameters and the above-mentioned calculated spraying parameters.

10. The automatic spraying method for a radiator workpiece according to claim 4, characterized in that: After the spraying is completed, the specific steps of controlling the radiator workpiece to move out of the spraying area are as follows: When the spray gun array moves in the opposite direction of the movement of the radiator workpiece and reaches the sum of the length of the workpiece entity and the length of the spray gun array, the spray gun array is controlled to stop spraying and reset along the direction of the movement of the radiator workpiece at a moving speed v3, and the spraying ends; And control the radiator workpiece to move out of the spraying area.

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