Large cabinet body inner and outer wall powder spraying system and working method thereof

Abstract

According to the large cabinet inner and outer wall powder spraying system and the working method thereof, automatic powder spraying of the inner and outer walls of a large cabinet is achieved, the physical labor of operators is saved, and the production efficiency is improved. The automatic spraying device comprises a spraying room, an automatic spraying system, a conveying system and a spraying room. The spraying room is arranged in the spraying room; the conveying system is mounted in the spraying room; the automatic spraying system is mounted on the spraying room; a spray gun is mounted on the spray gun driving mechanism I; a spray gun is mounted on the spray gun driving mechanism II; a spray gun is mounted on the third spray gun driving mechanism; a spray gun is mounted on the spray gun driving mechanism IV; a spray gun is mounted on the fifth spray gun driving mechanism; a spray gun is mounted on the sixth spray gun driving mechanism; a spray gun is mounted on the seventh spray gun driving mechanism; a spray gun is mounted on the eighth spray gun driving mechanism; a spray gun is installed on the ninth spray gun driving mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of electrostatic powder spraying equipment, and in particular to a large cabinet inner and outer wall powder spraying system and a working method thereof. Background Art

[0003] In the powder spraying production line, usually multiple groups of spray gun driving mechanisms carry spray guns to achieve efficient external surface powder spraying operations. For the inner cavity of the workpiece and some shielded areas, manual handheld spray guns are usually used for powder spraying, which is not efficient. Especially for complex workpieces such as large cabinets, whose structural features include outer wall panels, inner side panels, bottom surfaces and grooves, column channel steels and their backs, channel steel inner cavities, reinforcing rib plates, etc., the existing powder spraying operations are mainly completed manually.

[0004] The powder spraying system and method disclosed in the Chinese patent application number CN202320838167.X are arranged in sequence below the automatic powder spraying section along the conveying direction. The workpieces that fail to meet the powder spraying requirements can be returned to the powder spraying process for re-powder spraying, which improves the powder spraying quality, but cannot solve the powder spraying problem of the inner and outer walls of large cabinets. The spraying production system, tank container and spraying production method disclosed in the Chinese patent application number CN202410174313.2 are designed with different spraying stations for different areas of the tank container, and the corresponding spraying method is disclosed, which solves the problem of powder spraying on the outer surface of the tank workpiece, but the inner and outer walls of the large cabinet workpiece need to be powder sprayed, and because the cabinet has complex structural characteristics with many partitions, many shieldings and a large depth-to-diameter ratio, simple fixed spray guns, telescopic spray guns and their combinations cannot complete the powder spraying of all inner walls. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a large cabinet inner and outer wall powder spraying system and a working method thereof, which realizes automatic powder spraying of the inner and outer walls of the large cabinet, saves the manual labor of operators, and improves production efficiency.

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

[0007] A powder spraying system for inner and outer walls of a large cabinet, characterized in that it includes a spray booth, an automatic spray system, a conveying system and a spray room; the spray booth is arranged in the spray room; the conveying system is installed in the spray room; the automatic spray system is installed in the spray booth, and includes spray unit one, spray unit two, spray unit three, spray unit four, spray unit five, spray unit six, spray unit seven, spray unit eight and spray unit nine; spray unit one includes a spray gun driving mechanism one, on which a spray gun is installed; spray unit two includes a spray gun driving mechanism two, on which a spray gun is installed, and the spray gun driving mechanism two can drive the spray gun to move on the z-axis, y-axis and x-axis, and can drive the spray gun to rotate; spray unit three includes a spray gun driving mechanism three, on which a spray gun is installed, and the spray gun driving mechanism three can drive the spray gun to move on the z-axis, y-axis and x-axis; spray unit four includes a spray gun driving mechanism four, on which a spray gun driving mechanism four is installed The spray gun is equipped with a spray gun, and the spray gun driving mechanism 4 can drive the spray gun to move on the z-axis, y-axis, and x-axis; the spray unit 5 includes a spray gun driving mechanism 5, and the spray gun driving mechanism 5 is installed with a spray gun, and the spray gun driving mechanism 5 can drive the spray gun to move on the z-axis, y-axis, and x-axis; the spray unit 6 includes a spray gun driving mechanism 6, and the spray gun driving mechanism 6 is installed with a spray gun, and the spray gun driving mechanism 6 can drive the spray gun to move on the z-axis and x-axis; the spray unit 7 includes a spray gun driving mechanism 7, and the spray gun driving mechanism 7 is installed with a spray gun. A spray gun is installed on the driving mechanism seven, and the spray gun driving mechanism seven can drive the spray gun to move on the z-axis, y-axis and x-axis, and can drive the spray gun to rotate; the spray unit eight includes a spray gun driving mechanism eight, on which a spray gun is installed, and the spray gun driving mechanism eight can drive the spray gun to move on the x-axis and can drive the spray gun to rotate; the spray unit nine includes a spray gun driving mechanism nine, on which a spray gun is installed, and the spray gun driving mechanism nine can drive the spray gun to move on the x-axis and z-axis.

[0008] The present invention also includes a powder supply system, which includes a powder bag powder supply device and a mixed powder supply device; the powder bag powder supply device includes an electric hoist, a weighing sensor, a fixed frame, a balancing bracket, a powder bag, a discharge valve, a fluidized powder barrel, a new powder delivery pump and a vibrator; the weighing sensor is installed on the fixed frame; the electric hoist is installed on the weighing sensor; the balancing bracket is installed on the electric hoist; the powder bag is installed on the balancing bracket; the inlet of the discharge valve is connected to the outlet of the powder bag; the outlet of the discharge valve is connected to the vibrator, and the vibrator is connected to the fluidized powder barrel; the fluidized powder barrel is provided with a new powder delivery pump; a mixed powder supply device comprising a mixed powder barrel, a mixed powder delivery pump, an old powder pipeline, a new powder pipeline, a powder mixer, a cyclone separator and a rotary screen; the inlet of the new powder pipeline is connected to the new powder delivery pump, and the outlet is connected to the inlet of the powder mixer; the inlet of the old powder pipeline is connected to the cyclone separator, and the outlet is connected to the inlet of the powder mixer; the mixed powder outlet of the powder mixer is connected to the inlet of the rotary screen; the small particle outlet of the rotary screen is connected to the inlet of the mixed powder barrel; a mixed powder delivery pump is installed on the mixed powder barrel, and the mixed powder delivery pump is connected to the spray gun.

[0009] The powder bag powder supply device of the present invention further comprises a movable bracket, and the discharge valve, the vibrator and the fluidized powder barrel are all mounted on the movable bracket.

[0010] The invention provides an artificial supplementary spraying system at the inlet and outlet of the spraying room.

[0011] The present invention provides a detection system at the inlet of the spraying room.

[0012] A working method of a powder spraying system for inner and outer walls of a large cabinet workpiece, wherein the cabinet workpiece comprises a frame, a top plate, a front end plate, an inner end plate, a bottom plate, a rear end plate and a back plate; the top plate is mounted on the top of the frame, the front end plate is mounted on the front end face of the frame, the inner end plate is mounted on the middle of the frame, the bottom plate is mounted on the bottom of the frame, the rear end plate is mounted on the rear end face of the frame, and the back plate is mounted on the back of the frame; a bottom plate groove is arranged on the outer side face of the bottom plate; a top crossbeam is arranged in the middle of the top of the frame, a column channel steel is arranged in the middle, a rear end face channel steel is arranged on the rear end face, a front end face channel steel is arranged on the front end face, and an intermediate crossbeam is arranged on the column channel steel; a top plate weld is arranged between the bottom of the top plate and the frame; the method is characterized in that the following processes are included:

[0013] (1) The conveying system transports the cabinet workpiece into the spraying room;

[0014] (2) The conveying system then transports the cabinet workpiece to the spraying room, where the spraying operation is carried out:

[0015] (21) Spraying unit - spraying the top plate weld and top beam of the cabinet workpiece;

[0016] (22) The spray unit 2 sprays the groove position of the front end channel steel and the rear end channel steel of the cabinet workpiece, as well as the bottom position of the middle beam; when the front end channel steel and the rear end channel steel of the cabinet workpiece run to the spraying starting point, the spray gun driving mechanism 2 starts to drive the spray gun to move in the y direction, and at the same time moves to the rear side of the corresponding channel steel in the x direction and opens the spray gun, and then reciprocates in the z direction; when the middle beam of the cabinet workpiece runs to the spraying starting point, the spray gun driving mechanism 2 starts to drive the spray gun to move in the y direction, and at the same time moves to the bottom of the middle beam in the x direction, then opens and rotates the spray gun, and then reciprocates in the x direction; after completing the powder spraying operation, stop the powder spraying;

[0017] (23) The spraying unit 3 sprays the front end plate, the inner end plate and the rear end plate of the cabinet workpiece; when a certain end plate of the cabinet workpiece moves to the starting point of spraying, the spray gun driving mechanism 3 starts to drive the spray gun to move in the y direction and simultaneously moves in the x direction to the innermost side of the end plate, then opens the spray gun, and the spray gun reciprocates in the z direction and simultaneously retreats in the x direction to complete the spraying of the entire end plate; after the powder spraying operation of the end plate is completed, the powder spraying is stopped;

[0018] (24) The spray unit 4 sprays the groove position of the column channel steel of the cabinet workpiece; when a column channel steel of the cabinet workpiece runs to the starting point of spraying, the spray gun driving mechanism 4 starts to drive the spray gun to move in the y direction, and at the same time moves in the x direction to the side and rear of the column channel steel, and then opens the spray gun and reciprocates in the z direction. After completing the powder spraying operation of a single column channel steel, the spray gun driving mechanism 4 withdraws to its original position and sprays another column channel steel;

[0019] (25) Spraying unit 5 sprays the inner side of the back plate of the cabinet workpiece; when the cabinet workpiece moves to the spraying starting point, the spray gun driving mechanism starts to drive the spray gun to move in the y direction, and at the same time moves in the x direction to the inner side of the back plate, and then opens the spray gun and reciprocates in the z direction. After completing the inner side operation of the back plate, the spraying is stopped;

[0020] (26) Spraying unit 6 sprays the top plate outer part and the bottom plate outer part of the cabinet workpiece; when the cabinet workpiece moves to the spraying starting point, the spray gun starts spraying powder and stops spraying powder after the operation is completed;

[0021] (27) The spray unit 7 sprays the top plate and bottom plate of the cabinet workpiece; when the cabinet workpiece moves to the spray starting point, the spray gun driving mechanism 7 starts to drive the spray gun to move in the y direction and the z direction, and the spray gun moves to the bottom of the top plate and the top of the bottom plate, and then the spray gun is turned on, and the spray gun reciprocates along the x direction, and the spraying is stopped after the powder spraying operation is completed;

[0022] (28) The spray unit eight sprays the bottom plate groove position of the cabinet workpiece; when the cabinet workpiece is detected, the spray gun is turned on and the bottom plate groove is sprayed, and the spray gun driving mechanism eight drives the spray gun to rotate and swing, and when the cabinet workpiece completes the powder spraying operation and leaves, the powder spraying is stopped;

[0023] (29) The spray unit 9 sprays the outer position of the back plate of the cabinet workpiece; when the cabinet workpiece is detected, the spray gun driving mechanism 9 causes the spray gun to move along the x direction to the powder spraying position, turns on the spray gun, and the spray gun driving mechanism 9 starts to drive the spray gun to reciprocate in the z direction. When the cabinet workpiece completes the powder spraying operation and leaves, the powder spraying is stopped;

[0024] (3) The conveying system transports the cabinet workpiece out of the spraying room.

[0025] The present invention controls the action of the automatic spraying system through the control system during spraying; the control system is provided with control instructions of the automatic spraying system, and the control instructions include synchronous accompanying instructions, axis positioning instructions, multi-axis motion instructions, waiting instructions, spray gun switch instructions and spray gun parameter instructions; the synchronous accompanying instructions control the corresponding spray gun driving mechanism and the cabinet workpiece to move at the same speed in the y-axis motion direction; the axis positioning instructions control the speed and target position of the corresponding motion axis of the spray gun driving mechanism; the multi-axis motion instructions control the coordinated motion process of multiple axes of the spray gun driving mechanism, and set the parameters such as the upstroke, downstroke and speed of each axis; the waiting instructions are used to control the single axis of the spray gun driving mechanism to pause during operation, and continue to move after the trigger condition is met, and support three situations: time triggering, displacement triggering and signal triggering; the spray gun switch instructions control the opening and closing of the corresponding spray gun; the spray gun parameter instructions control the parameters such as the voltage, current, powder output and total gas volume of the corresponding spray gun.

[0026] The conveying system of the present invention measures the displacement value of the cabinet workpiece relative to the origin in the traveling direction in real time through an encoder, which is recorded as the y value; the depth of the inner cavity of the cabinet workpiece 11 and the height of the cabinet workpiece are scanned, which are recorded as the x value and the z value to form a data table (x, y, z), in which each row of data corresponds to a cross-sectional data of the cabinet workpiece, and the y value is used to judge the actual position reached by the workpiece. When this cross-section runs to the starting position defined by the automatic spraying system, the control calculates the 3D size of the inner cavity of the cabinet workpiece according to its x value and z value, and calculates the operating parameters of the spray gun.

[0027] The spray unit 3 of the present invention controls the spray gun to extend in and out in the x direction through its advance and retreat axis, and controls the spray gun to rise and fall in the z direction through its lifting axis to perform spraying operation, and the number of reciprocating times of its entry and exit is defined as τ, which affects the powder output flow rate. The more times, the smaller the powder output flow rate demand; the spray control of the spray unit 3 is to calculate the operation time of each control axis, the total powder consumption and other data through process data, combined with the actual property parameters of the equipment and the powder property data, and then calculate the powder output flow rate of a single spray gun from the total powder consumption; the process data includes spray thickness, length, height, and reciprocating number τ; the actual property parameters of the equipment include the anti-collision gun safety distance S d , Chain speed V s , the speed V of the advance and retreat axis in the x direction x , the speed V of the lifting axis in the z direction z , gun distance D, number of guns n, and coverage diameter d of the spray gun 200; powder property data include powder loading rate μ and powder density ρ;

[0028] The calculation of each parameter in spraying control is as follows:

[0029] 1) With speed V y =V s , because the spray gun sprays in the process of advancing and retreating in the x direction, during which the y direction remains stationary relative to the workpiece through accompanying movement;

[0030] 2) Single entry or exit time T1 = x(y t ) / V x ,y t is the y value corresponding to each end plate, x(y t ) is the depth value of the end plate in the x direction;

[0031] 3) End plate area S = x(y t )*z(y t ), z(y t ) is the height of the end plate in the z direction;

[0032] 4) With time T s =2*τ*T1;

[0033] 5) Full operation time T 总 =T s ;

[0034] 6) Accompanying distance Y s =T s *V s ;

[0035] 7) Total powder consumption after spraying the entire surface M = ρ*δ*S / μ;

[0036] 8) Powder flow rate of a single powder gun

[0037] The spray unit 5 of the present invention controls the spray gun to extend in and out in the x direction through its advance and retreat axis, and controls the spray gun to rise and fall in the z direction through its lifting axis to perform spraying operation. The accompanying movement of the spray unit 5 in the y direction only exists in the process of advancing and retreating the gun, and no spraying operation is performed during the advancing and retreating process. The spray unit 5 is stationary in the y direction during the powder spraying process. Therefore, the spraying control of the spray unit 5 is to calculate the operation time, powder output flow rate and other data of each control axis through process data, combined with the actual property parameters of the equipment and the powder property data, and then calculate the total powder consumption from the powder output flow rate; the process data includes spray thickness, length, and height; the actual property parameters of the equipment include the anti-collision gun safety distance S d , Chain speed V s , the speed V of the advance and retreat axis in the x direction x , the speed V of the lifting axis in the z direction z , gun distance D, number of guns n, and coverage diameter d of the spray gun; powder property data include powder loading rate μ and powder density ρ;

[0038] The calculation of each parameter in spraying control is as follows:

[0039] 1) Accompanying shaft speed V y =V s ; Because it takes time for the spray gun 200 to extend into and out of the inner cavity, the spray gun is kept in sync with the workpiece in the y direction during the extension and withdrawal process, and ends the accompanying after entering the position, and then starts spraying, so as to ensure that the spraying position is relatively fixed and will not hit the outer contour when withdrawing;

[0040] 2) Effective static operation time T U =(LS d *2) / V s , this time is the effective spraying operation time, excluding the time of advancing and retracting the gun;

[0041] 3) Gun feed time T1 = x(y0) / V x , gun withdrawal time T2 = x(y e ) / V x , y0, y e are the positions of the starting point and the ending point respectively; accompanied by the time T s =T1+T2, which is the total time of advancing and retreating;

[0042] 4) Full operation time T 总 =T U +T s ;

[0043] 5) Accompanying distance Y s =T s *V s ;

[0044] 6) Z direction reciprocating stroke Z D =Dd, reciprocating time T z =Z D / V z , reciprocating times τ = T U / T z ;

[0045] 7) Powder flow rate of a single powder gun Q = ρ*δ*z max *V s / (μ*n), z max is the maximum height of the inner cavity;

[0046] Total powder consumption after spraying the entire surface M=n*Q*T U .

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] Through the organic integration and layout optimization of spray gun drive mechanisms of different structural forms and matching of corresponding working methods, powder spraying tasks that cannot be completed by a single spray gun drive mechanism or a simple combination of spray gun drive mechanisms are realized, namely, automatic powder spraying of inner and outer walls of large cabinets, which saves the physical labor of operators and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the planar layout structure of an embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of the plan layout structure of the automatic spraying system according to an embodiment of the present invention;

[0051] Figure 3 This is a schematic diagram of the axonometric structure of a spray unit 1 according to an embodiment of the present invention;

[0052] Figure 4 This is a schematic diagram of the axonometric structure of the spray unit 2 according to an embodiment of the present invention;

[0053] Figure 5 This is a schematic diagram of the axonometric structure of the spray unit 3 according to an embodiment of the present invention;

[0054] Figure 6 Schematic diagram of the axonometric structure of the spray unit 4 according to an embodiment of the present invention;

[0055] Figure 7 This is a schematic diagram of the axonometric structure of the spray unit 5 according to an embodiment of the present invention;

[0056] Figure 8 This is a schematic diagram of the axonometric structure of a spray unit 6 according to an embodiment of the present invention;

[0057] Fig. 9This is a schematic diagram of the axonometric structure of the spray unit 7 according to an embodiment of the present invention;

[0058] Fig.10 Schematic diagram of the isometric structure of the spray unit 8 according to an embodiment of the present invention;

[0059] Fig.11 This is a schematic diagram of the axonometric structure of a spray unit nine according to an embodiment of the present invention;

[0060] Fig.12 It is a schematic diagram of the cross-sectional structure of the spraying unit 1 during spraying according to an embodiment of the present invention;

[0061] Fig.13 This is a schematic diagram of the cross-sectional structure of the spray unit 2 during spraying according to an embodiment of the present invention;

[0062] Fig.14 It is a schematic diagram of the cross-sectional structure of the spray unit 3 during spraying according to an embodiment of the present invention;

[0063] Fig.15 It is a schematic diagram of the cross-sectional structure of the spray unit 4 during spraying according to an embodiment of the present invention;

[0064] Fig.16 It is a schematic diagram of the cross-sectional structure of the spraying unit 5 during spraying according to an embodiment of the present invention;

[0065] Fig.17 It is a schematic diagram of the cross-sectional structure of the spray unit 6 during spraying according to an embodiment of the present invention;

[0066] Fig.18 It is a schematic diagram of the cross-sectional structure of the spraying unit 7 during spraying according to an embodiment of the present invention;

[0067] Fig.19 It is a schematic diagram of the cross-sectional structure of the spraying unit 8 during spraying according to an embodiment of the present invention;

[0068] Fig. 20 It is a schematic diagram of the cross-sectional structure of the spraying unit 9 during spraying according to an embodiment of the present invention;

[0069] Fig.21 2 is a schematic diagram of the front view of the powder bag powder feeding device according to an embodiment of the present invention;

[0070] Fig. 22 2 is a schematic side view of the powder bag powder feeding device according to an embodiment of the present invention;

[0071] Fig.23 It is a schematic diagram of the three-dimensional structure of the powder bag powder feeding device according to an embodiment of the present invention;

[0072] Fig.24 It is a schematic structural diagram of a powder mixing and supplying device according to an embodiment of the present invention;

[0073] Figure 25-27It is a structural schematic diagram of three viewing angles of a cabinet workpiece that needs to be sprayed according to an embodiment of the present invention. DETAILED DESCRIPTION

[0074] 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.

[0075] like Figure 25-27 As shown, the cabinet workpiece 11 to be sprayed includes a frame, a top plate 111, a front end plate 112, an inner end plate 114, a bottom plate 118, a rear end plate 1110 and a back plate 1112. The top plate 111 is installed on the top of the frame, the front end plate 112 is installed on the front face of the frame, the inner end plate 114 is installed in the middle of the frame, the bottom plate 118 is installed on the bottom of the frame, the rear end plate 1110 is installed on the rear face of the frame, and the back plate 1112 is installed on the back of the frame; a bottom plate groove 119 is provided on the outer side of the bottom plate 118. A top crossbeam 1113 is provided in the middle of the top of the frame, a column channel steel 115 is provided in the middle, a rear face channel steel 116 is provided on the rear face, a front face channel steel 117 is provided on the front face, and an intermediate crossbeam 113 is provided on the column channel steel 115; a top plate weld 1111 is provided between the bottom of the top plate 111 and the frame. The cabinet workpiece 11 can be an electric control cabinet, a display cabinet, etc.

[0076] like Figure 1 As shown, a powder spraying system for inner and outer walls of a large cabinet workpiece includes a spraying room 1, an automatic spraying system 2, a manual supplementary spraying system 3, a conveying system 4, a powder supply system 5, a control system 6, a detection system 7 and a spraying room 8.

[0077] The spray booth 1 is arranged in the spray room 8. The inlet and outlet of the spray booth 1 are provided with a manual spraying system 3 for spraying the areas that the automatic spraying system 2 cannot or misses.

[0078] A detection system 7 is provided at the entrance of the spray booth 8 to scan the depth of the inner cavity of the cabinet workpiece 11 and the height of the cabinet workpiece 11 in real time.

[0079] The conveying system 4 is installed in the spray booth 8 and is used to convey the cabinet workpiece 11 .

[0080] like Figure 2The automatic spraying system 2 is installed in the spraying room 1, which includes two sets of spraying units 1 21, one set of spraying unit 2 22, one set of spraying unit 3 23, one set of spraying unit 4 24, one set of spraying unit 5 25, two sets of spraying units 6 26, one set of spraying unit 7 27, two sets of spraying units 8 28, and one set of spraying unit 9 29. One set of spraying unit 1 21, one set of spraying unit 2 22, one set of spraying unit 3 23, one set of spraying unit 4 24, one set of spraying unit 5 25, one set of spraying unit 6 26, and one set of spraying unit 7 27 are arranged on the front side of the cabinet workpiece 11, and another set of spraying unit 1 21, another set of spraying unit 6 26, two sets of spraying units 8 28, and one set of spraying unit 9 29 are arranged on the back side of the cabinet workpiece 11. The spray gun driving mechanism 1 211 adopts a multi-axis industrial robot, and the spray gun driving mechanisms 2 to 9 adopt a reciprocating machine. Each spraying unit of the automatic spraying system 2 is interlocked with the conveying system 4 .

[0081] like Figure 3 As shown, the spray unit 21 includes a spray gun driving mechanism 211, on which two spray guns 200 are installed. The spray unit 21 can drive the spray guns 200 to move at least on the z-axis, the y-axis, and the x-axis.

[0082] like Figure 4 As shown, the spray unit 22 includes a spray gun driving mechanism 221, on which four spray guns 200 are installed. The spray gun driving mechanism 221 can drive the spray guns 200 to move on the z-axis, y-axis, and x-axis, and can drive the spray guns 200 to rotate.

[0083] like Figure 5 As shown, the spray unit 3 23 includes a spray gun driving mechanism 3 231, on which sixteen spray guns 200 are mounted via a connecting plate 232. The spray gun driving mechanism 3 231 can drive the spray guns 200 to move on the z-axis, y-axis, and x-axis.

[0084] like Figure 6 As shown, the spraying unit 424 includes a spray gun driving mechanism 4241, on which four spray guns 200 are installed through four connecting rods 4242. The connection angle between the spray gun 200 and the connecting rod 4242 is adjustable. The spray gun driving mechanism 4241 can drive the spray gun 200 to move on the z-axis, y-axis, and x-axis.

[0085] like Figure 7 As shown, the spraying unit 5 25 includes a spray gun driving mechanism 5 251, on which four spray guns 200 are installed through four connecting rods 5 252. The spray gun driving mechanism 5 251 can drive the spray guns 200 to move on the z-axis, y-axis, and x-axis.

[0086] like Figure 8 As shown, the spraying unit 6 26 includes a spray gun driving mechanism 6 261, on which eight spray guns 200 are mounted via three connecting rods 6 262. The nozzles of the spray guns 200 face in different directions. The spray gun driving mechanism 6 261 can drive the spray guns 200 to move on the z-axis and the x-axis. The spray gun driving mechanism six 261 has four sets of independent sliders, which have the function of reciprocating motion in the x-direction and partially have the function of moving up and down along the z-axis. The spray gun 200 is installed at the end of the x-moving axis and the connecting rod. The slider one 2611 is an x-axis with a fixed height, and the nozzle of the spray gun 200 at its end faces downward. The slider two 2612 is an x-axis that can move up and down independently along the z-axis, and the nozzle of the spray gun 200 at its end faces backward. The slider three 2613 is an x-axis that can move up and down independently along the z-axis, and the nozzle of the spray gun 200 at its end faces upward. The slider four 2614 is an x-axis that can move up and down independently along the z-axis, and two spray guns 200 are installed at its end, and their nozzles face upward. The nozzles of the two fixed-position spray guns 200 at the top of the spray gun driving mechanism face forward, and the nozzle of the one fixed-position spray gun 200 at the bottom is tilted upward.

[0087] like Fig. 9 As shown, the spraying unit 7 27 includes a spray gun driving mechanism 7 271, on which four spray guns 200 are installed. The spray gun driving mechanism 7 271 can drive the spray guns 200 to move on the z-axis, y-axis, and x-axis, and can drive the spray guns 200 to rotate. The spray gun driving mechanism 7 271 has two sets of independent sliders 7 2711, both of which have the functions of reciprocating motion in the x-direction and moving up and down and rotating in the z-axis. Two spray guns 200 are installed at the end of each set of x-axis, and the nozzles of the two upper spray guns 200 face upward, while the nozzles of the two lower spray guns 200 face downward.

[0088] like Fig.10 As shown, the spraying unit 8 28 includes a spray gun driving mechanism 8 281, on which seven spray guns 200 are mounted. The spray gun driving mechanism 8 281 can drive the spray guns 200 to move on the x-axis and can drive the spray guns 200 to rotate.

[0089] like Fig.11 As shown, the spray unit 929 includes a spray gun driving mechanism 9291, on which three spray guns 200 are installed through three connecting rods 9292, and the nozzles of the spray guns 200 are all facing forward. The spray gun driving mechanism 9291 can drive the spray guns 200 to move on the x-axis and z-axis.

[0090] The powder supply system 5 is connected to the spray gun 200 and includes a powder bag powder supply device and a mixed powder supply device.

[0091] There are at least two sets of powder bag supply devices. In this embodiment, four sets are provided, two for use and two for backup. Each set of powder bag supply devices includes an electric hoist 51, a weighing sensor 52, a fixed frame 53, a balance bracket 54, a powder bag 55, a discharge valve 57, a fluidized powder barrel 58, a new powder delivery pump 59, a connecting flange 510, a flexible connection 511, a movable bracket 512 and a vibrator 513.

[0092] The weighing sensor 52 is mounted on the fixed frame 53; the electric hoist 51 is mounted on the weighing sensor 52 through the hook at the bottom of the weighing sensor 52. The powder bag 55 can be lifted and lowered by the electric hoist 51, which is easy to assemble. The weight of the powder can be detected by the overall hoisting and then fed back to the control system. The balance bracket 54 is mounted on the electric hoist 51. The powder bag 55 is mounted on the balance bracket 54.

[0093] The inlet of the discharge valve 57 is provided with a connecting flange 510, and the inlet of the discharge valve 57 is connected to the outlet of the powder bag 55 through the connecting flange 510. The outlet of the discharge valve 57 is connected to the vibrator 513, and the vibrator 513 is connected to the fluidized powder barrel 58 through a flexible connection 511. The flexible connection 511 can compensate for the vibration deviation during the operation of the equipment, ensure that the new powder delivery pump 59 stably supplies powder, and guide the powder into the fluidized powder barrel 58 through the vibration of the vibrator 513. The bottom of the fluidized powder barrel 58 is provided with a fluidizing plate 56, and the side wall is provided with a new powder delivery pump 59. The powder in the powder bag 55 enters the fluidized powder barrel 58 through the discharge valve 57 and the vibrator 513, and the fluidized powder can be smoothly delivered to the powder supply center.

[0094] The discharge valve 57, the vibrator 513 and the fluidized powder barrel 58 are all mounted on the mobile bracket 512. When the powder bag 55 needs to be replaced, the connecting flange 510 is disassembled, the discharge valve 57 is separated from the powder bag 55, and the mobile bracket 512 is moved to remove the discharge valve 57, the vibrator 513, the fluidized powder barrel 58, etc. for easy replacement.

[0095] The mixing powder supply device includes a mixing powder barrel 514, a mixing powder delivery pump 515, a recovery powder barrel 516, a used powder pipeline 517, a new powder pipeline 518, a powder level detector 519, an air amplifier 521, a powder mixer 522, a cyclone separator 524, a rotary screen 525, a used powder delivery pump 526 and an impurity collection barrel 527.

[0096] The inlet of the new powder pipeline 518 is connected to the new powder delivery pump 59, and the outlet is connected to the inlet of the powder mixer 522; an air amplifier 521 is installed on the new powder pipeline 518. There are at least two new powder pipelines 518, and one new powder pipeline 518 is equipped with a set of powder bag powder supplying devices. By opening and closing the new powder delivery pump 59 of each set of powder bag powder supplying devices, the powder supply and powder cut-off of the powder bag powder supplying devices are realized.

[0097] The powder from the powder bag 55 is new powder, which is delivered by the new powder delivery pump 59 and increases the transmission kinetic energy through the air amplifier 521. The inlet of the old powder pipeline 517 is connected to the cyclone separator 524, and the outlet is connected to the inlet of the powder mixer 522; the old powder delivery pump 526 and the No. 1 valve M1 are installed on the old powder pipeline 517. The powder collected at the bottom of the cyclone separator 524 is the recycled old powder, which has poorer quality and may have large impurities in the middle. The operating time of the new powder delivery pump 59 and the old powder delivery pump 526 is controlled to control the ratio of new and old powder entering the powder mixer 522. A powder level detector 519 is set at the bottom of the cyclone separator 524 to detect the powder level at the bottom at all times.

[0098] The recovery powder barrel 516 is connected to the old powder pipeline 517 through the second valve M2. When the powder level is too high and the old powder is not allowed to be mixed, the first valve M1 is closed, the second valve M2 is opened, and the excess old powder is discharged into the recovery powder barrel 516.

[0099] The mixed powder outlet of the powder mixer 522 is connected to the inlet of the rotary screen 525, and an ultrafine powder outlet 523 is provided on the top of the powder mixer 522; the small particle outlet of the rotary screen 525 is connected to the inlet of the mixed powder barrel 514, and the large particle outlet is connected to the inlet of the impurity collection barrel 527. The new powder and the old powder are fully mixed in the powder mixer 522, and most of the mixed powder falls into the inlet of the rotary screen 525 by gravity and centrifugal force, and a small amount of ultrafine powder is discharged through the ultrafine powder outlet 523 on the top. Under the action of the rotary screen 525, the small particle powder of the mixed powder moves to the middle of the screen, is screened into the powder hopper of the small particle outlet, and then falls into the mixed powder barrel 514; the large particle impurities are rotated to the periphery of the rotary screen 525 due to centrifugal force, fall into the impurity collection barrel 527, and are cleaned regularly.

[0100] A mixed powder delivery pump 515 is installed on the mixed powder barrel 514 , and the mixed powder delivery pump 515 is connected to the spray gun 200 .

[0101] The powder supply system 5 is provided with a weighing sensor, which can detect the remaining powder amount in the powder bag at any time. If the powder amount of a powder bag supply device is insufficient, the new powder delivery pump of the powder bag supply device is turned off, and the new powder delivery pump of another powder bag supply device is turned on at the same time. In this way, when the powder bag is replaced, the powder supply will not be interrupted, and uninterrupted powder supply can be achieved. The new powder and the old powder of the powder supply system 5 are mixed and filtered through a rotary screen before entering the mixed powder barrel, and the coating appearance can be controlled.

[0102] A working method of a powder spraying system for inner and outer walls of a large cabinet workpiece includes the following processes:

[0103] (1) The conveying system 4 conveys the cabinet workpiece 11 into the spraying room 8, and first conveys the cabinet workpiece 11 to the manual spraying system 3 at the entrance of the spraying room 1, and manually sprays the areas on the cabinet workpiece 11 that cannot be sprayed by the automatic spraying system 2.

[0104] Furthermore, the cabinet workpiece 11 stops moving when it moves to the entrance of the spray booth 1 through the conveying system 4, and the posture detection device detects the hanging posture of the cabinet workpiece 11. When the posture of the cabinet workpiece 11 is outside the initially set error range, the signal light flashes to remind the operator to re-hang it. When the posture of the cabinet workpiece 11 is within the error range, the cabinet workpiece 11 moves forward continuously and slowly.

[0105] (2) The conveying system 4 then conveys the cabinet workpiece 11 to the spraying room 1, where the spraying operation is performed:

[0106] (21) Fig.12 As shown, the spraying unit 1 21 sprays the top plate weld 1111 and the top crossbeam 1113 of the cabinet workpiece 11;

[0107] (22) Fig.13 As shown, the spray unit 22 sprays the groove position of the front end face channel steel 117 and the rear end face channel steel 116 of the cabinet workpiece 11, as well as the bottom position of the middle crossbeam 113; when the front end face channel steel 117 and the rear end face channel steel 116 of the cabinet workpiece 11 run to the spray starting point, the spray gun driving mechanism 221 starts to drive the spray gun 200 to move in the y direction, and the accompanying movement is to move at the same speed as the cabinet workpiece 11, and at the same time, the spray gun 200 moves in the x direction to the rear side of the corresponding channel steel and opens, and then the spray gun 200 moves in the z direction. When the middle crossbeam 113 of the cabinet workpiece 11 moves to the spraying starting point, the spray gun driving mechanism 221 starts to drive the spray gun 200 to move in the y direction, and at the same time, the spray gun 200 moves to the bottom of the middle crossbeam 113 in the x direction, and then opens and rotates the spray gun 200, and the spray gun 200 reciprocates in the x direction again; after the powder spraying operation is completed, the spray gun driving mechanism 221 returns to its original position, and when the same feature point of another cabinet workpiece 11 is detected, a new round of cyclic powder spraying operation is started;

[0108] (23) Fig.14As shown, the spray unit three 23 sprays the front end plate 112, the inner end plate 114 and the rear end plate 1110 of the cabinet workpiece 11; when a certain end plate of the cabinet workpiece 11 runs to the starting point of the spray unit three 23, the spray gun driving mechanism three 231 starts to drive the spray gun 200 to move in the y direction, and the spray gun 200 simultaneously moves rapidly in the x direction to the innermost side of the end plate, and then the spray gun 200 is turned on, and the spray gun 200 reciprocates in the z direction, and the spray gun 200 simultaneously retreats slowly in the x direction to complete the spraying of the entire end plate; after completing the powder spraying operation of the end plate, the spray gun driving mechanism three 231 withdraws to its original position, and when another end plate of the cabinet workpiece 11 is detected, a new round of cyclic powder spraying operation is started;

[0109] (24) Fig.15 As shown, the spraying unit 24 sprays the groove position on the back of the column channel steel 115 of the cabinet workpiece 11; when a column channel steel 115 of the cabinet workpiece 11 runs to the starting point of the spraying unit 24, the spray gun driving mechanism 241 starts to drive the spray gun 200 to move in the y direction, and the spray gun 200 simultaneously moves rapidly in the x direction to the side and rear of the column channel steel 115, and then the spray gun 200 is turned on, and the spray gun 200 reciprocates in the z direction. After completing the powder spraying operation of a single column channel steel 115, the spray gun driving mechanism 241 withdraws to its original position, and when another column channel steel 115 of the cabinet workpiece 11 is detected, a new round of cyclic powder spraying operation is started;

[0110] (25) Fig.16 As shown, the spray unit 5 25 sprays the inner side of the back plate 1112 of the cabinet workpiece 11; when the cabinet workpiece 11 runs to the starting point of the spray unit 5 25, the spray gun driving mechanism 251 starts to drive the spray gun 200 to move in the y direction, and the spray gun 200 quickly moves to the inner side of the back plate 1112 along the x direction at the same time, and then the spray gun 200 is turned on, and the spray gun 200 reciprocates in the z direction. After completing the powder spraying operation on the inner side of the back plate 1112, the spray gun driving mechanism 251 withdraws to the original position, and when another cabinet workpiece 11 is detected, a new round of cyclic powder spraying operation is started;

[0111] (26) Fig.17 As shown, the spray unit 6 26 sprays the outside of the top plate 111 and the outside of the bottom plate 118 of the cabinet workpiece 11; when the cabinet workpiece 11 runs to the starting point of the spray unit 6 26, the spray gun 200 carried by the fixed connecting rod starts spraying powder when it detects the cabinet workpiece 11, and ends spraying powder when the cabinet workpiece 11 leaves; the spray gun 200 carried by the x-axis slider starts spraying powder when it detects the cabinet workpiece 11, and the spray gun 200 reciprocates in the x-direction at the same time, and exits the spray gun 200 when it detects obstacles such as hangers, and continues to spray powder reciprocatingly after bypassing the obstacles;

[0112] (27) Fig.18 As shown, the spray unit 7 27 sprays the inside of the top plate 111 and the inside of the bottom plate 118 of the cabinet workpiece 11; when the cabinet workpiece 11 moves to the starting point of the spray unit 7 27, the spray gun driving mechanism 7 271 starts to drive the spray gun 200 to move in the y direction, and at the same time, the two sets of sliders 2711 drive the spray gun 200 to move in the z direction, and the spray gun 200 respectively moves to the lower part of the top plate 111 and the upper part of the bottom plate 118, and then the spray gun 200 is turned on, and the slider drives the spray gun 200 to reciprocate along the x direction. The spray gun 200 can rotate along the x direction as needed. When it detects that the partition in the cabinet workpiece 11 is about to hinder the movement of the gun rod, the slider quickly withdraws, and continues to spray powder reciprocatingly after bypassing the obstacle;

[0113] (28) Fig.19 As shown, the spray unit 8 28 sprays the bottom plate groove 119 position of the cabinet workpiece 11; when the cabinet workpiece 11 is detected, the spray gun 200 is turned on to start spraying the bottom plate groove 119, and the spray gun driving mechanism 8 281 drives the spray gun 200 to start rotating and swinging. When the cabinet workpiece 11 leaves, the powder spraying is stopped. When another cabinet workpiece 11 is detected, a new round of cyclic powder spraying operation is started;

[0114] (29) Fig. 20 As shown, the spray unit 929 sprays the external position of the back plate 1112 of the cabinet workpiece 11; when the cabinet workpiece 11 is detected, the spray gun driving mechanism 9291 moves the spray gun 200 to a suitable distance from the back plate 1112 along the x direction, turns on the spray gun 200, and the spray gun driving mechanism 9291 starts to drive the spray gun 200 to reciprocate in the z direction. When the cabinet workpiece 11 leaves, the powder spraying is stopped, and when another cabinet workpiece 11 is detected, a new round of cyclic powder spraying operation is started.

[0115] (3) The conveying system 4 then conveys the cabinet workpiece 11 to the manual spraying system 3 at the exit of the spraying room 1, and manually sprays the areas on the cabinet workpiece 11 that the automatic spraying system 2 cannot spray or miss spraying; finally, the conveying system 4 conveys the cabinet workpiece 11 out of the spraying room 8.

[0116] The control system 6 is connected to the automatic spraying system 2. During spraying, the action of the automatic spraying system 2 is controlled by the control system 6. The control instructions of the automatic spraying system 2 are set in the control system 6. The control instructions include synchronous accompanying instructions, axis positioning instructions, multi-axis motion instructions, waiting instructions, spray gun switch instructions and spray gun parameter instructions; the synchronous accompanying instructions control the corresponding spray gun drive mechanism and the cabinet workpiece 11 to move at the same speed in the y-axis movement direction; the axis positioning instructions control the speed and target position of the corresponding motion axis of the spray gun drive mechanism; the multi-axis motion instructions control the coordinated movement process of multiple axes of the spray gun drive mechanism, and set the upstroke, downstroke, speed and other parameters of each axis; the waiting instructions are used to control the single axis of the spray gun drive mechanism to pause during operation, and continue to move after the trigger condition is met, supporting time triggering, displacement triggering, and signal triggering. The spray gun switch instructions control the opening and closing of the corresponding spray gun 200; the spray gun parameter instructions control the voltage, current, powder output, total gas volume and other parameters of the corresponding spray gun 200. The specific instructions are as follows:

[0117] 1. Synchronous accompanying instruction, set the synchronous distance, that is, the distance that the spray unit travels along the direction of the workpiece. The speed of the accompanying axis is greater than the workpiece travel speed. When this instruction is executed, the accompanying axis ends after completing the accompanying distance and returns to the initial position after completion.

[0118] 2. Axis positioning instruction, set the axis position and axis speed. When this instruction is executed, the corresponding axis must move to the target position of the axis before it is considered to be executed, and the program will move on to execute the next instruction. This instruction is used where there is a need to judge the position. If the program is stuck, the axis needs to be reset. At this time, resend this instruction to the axis to reset it.

[0119] 3. Set multi-axis motion instructions, define the starting axis and the ending axis, and set its upstroke, downstroke, speed and other parameters. This command is used to batch control axes with the same target within the range to achieve their positioning or reciprocating motion. When this instruction is executed, the corresponding axis movement does not need to wait for the axis to move to the target position. The system only sends the relevant control parameters to the target axis. After the sending is completed, the program continues to execute.

[0120] 4. Waiting instruction: This instruction is used to pause a single axis during operation, and continue to run subsequent instructions of the axis after the waiting conditions are met. It supports three situations: time waiting, displacement waiting, and trigger signal waiting. Time waiting means waiting for a certain period of time before continuing to run, displacement waiting means waiting for the workpiece to move a certain displacement before continuing to run, and trigger signal waiting means waiting for the defined signal to be triggered before continuing to run.

[0121] 5. The switch gun instruction defines the start gun and the end gun. This instruction is used to start and stop the spray gun 200 within the batch control range. Turning on the gun controls the spray gun 200 to spray powder, and turning off the gun controls the spray gun 200 to stop spraying powder.

[0122] 6. Set the spray gun parameter instruction to define the starting gun and the ending gun. This instruction is used to batch transfer the parameters of the spray gun 200 within the range. The parameters include powder output, total gas volume, tertiary gas, voltage, and current.

[0123] The conveying system 4 measures the displacement value of the cabinet workpiece 11 relative to the origin in the direction of travel in real time through the encoder, which is recorded as the y value; when the cabinet workpiece 11 passes through the detection system 7, the depth of the inner cavity of the cabinet workpiece 11 and the height of the cabinet workpiece 11 are scanned in real time, which are recorded as the x value and the z value, forming a data table of (x, y, z), each row of data corresponds to a cross-sectional data of the cabinet workpiece 11, and the y value is used to judge the actual position reached by the workpiece. When this cross section runs to the starting position defined by the automatic spraying system 2, the control system 6 calculates the 3D size of the inner cavity of the cabinet workpiece 11 according to its x value and z value, and combines the parameters such as the anti-collision gun safety distance, spraying thickness, conveying chain speed, and the moving speed of the spray gun 200 to calculate the starting position of the spray gun 200, the number of reciprocating times in the x direction, the accompanying distance in the y direction, the powder output rate and other data and automatically form the programming instruction code. For the local structure with a complex inner cavity that cannot be detected, it is necessary to manually write the insertion instruction on the basis of the automatic code to avoid obstacles for special spraying treatment. All instructions together constitute the pre-programmed powder spraying instructions for the workpiece. Once the first pre-programmed instruction for the workpiece of this type is formed, the workpiece of the same type can complete the automatic spraying process by automatically executing this set of instructions.

[0124] The spray unit three 23 controls the spray gun 200 to extend in and out in the x direction through its advance and retreat axis, and controls the spray gun 200 to rise and fall in the z direction through its lifting axis to perform spraying operations. The number of reciprocating times of its entry and exit is defined as τ. This value affects the powder flow rate. The more times, the smaller the powder flow rate demand. Therefore, the spray control of the spray unit three 23 is mainly calculated through process data, combined with the actual property parameters of the equipment and the powder property data to obtain data such as the operation time of each control axis and the total powder consumption, and then the powder flow rate of a single spray gun 200 is calculated based on the total powder consumption. The process data includes spray thickness, length, height, and number of reciprocating times τ; the actual property parameters of the equipment include the anti-collision gun safety distance S d , Chain speed V s , the speed V of the advance and retreat axis in the x direction x , the speed V of the lifting axis in the z direction z , gun distance D of the spray gun 200, number of guns n, and diameter d of the coverage range of the spray gun 200; powder property data including powder loading rate μ and powder density ρ;

[0125] The calculation of each parameter in spraying control is as follows:

[0126] 1) With speed V y =V s, because the spray gun 200 sprays in the process of advancing and retreating in the x direction, during which the y direction remains stationary relative to the workpiece by accompanying movement;

[0127] 2) Single entry or exit time T1 = x(y t ) / V x ,y t is the y value corresponding to each end plate, x(y t ) is the depth value of the end plate in the x direction;

[0128] 3) End plate area S = x(y t )*z(y t ), z(y t ) is the height of the end plate in the z direction;

[0129] 4) With time T s =2*τ*T1;

[0130] 5) Full operation time T 总 =T s ;

[0131] 6) Accompanying distance Y s =T s *V s ;

[0132] 7) Total powder consumption after spraying the entire surface M = ρ*δ*S / μ;

[0133] 8) Powder flow rate of a single powder gun

[0134] The spray unit 5 25 controls the spray gun 200 to extend and withdraw in the x direction through its advance and retreat axis, and controls the spray gun 200 to rise and fall in the z direction through its lifting axis. The accompanying movement of the spray unit 5 25 in the y direction only exists in the process of advancing and retracting the gun, and no spraying operation is performed during the process of advancing and retracting the gun. During the powder spraying process, the spray unit 5 25 is stationary in the y direction. Therefore, the spraying control of the spray unit 5 25 is mainly calculated through process data, combined with the actual property parameters of the equipment and the powder property data to obtain the operation time of each control axis, powder output flow rate and other data, and then the total powder consumption is calculated from the powder output flow rate. The process data includes spray thickness, length, and height; the actual property parameters of the equipment include the anti-collision gun safety distance S d , Chain speed V s , the speed V of the advance and retreat axis in the x direction x , the speed V of the lifting axis in the z direction z , gun distance D of the spray gun 200, number of guns n, and diameter d of the spray gun coverage range; powder property data include powder loading rate μ and powder density ρ;

[0135] The calculation of each parameter in spraying control is as follows:

[0136] 1) Accompanying shaft speed V y =V s Because it takes time for the spray gun 200 to extend into and out of the inner cavity, the spray gun 200 keeps synchronization with the workpiece in the y direction during the extension and withdrawal process, stops accompanying after entering the position, and then starts spraying, so as to ensure that the spraying position is relatively fixed and will not hit the outer contour when withdrawing;

[0137] 2) Effective static operation time T U =(LS d *2) / V s , this time is the effective spraying operation time, excluding the time of advancing and retracting the gun;

[0138] 3) Gun feed time T1 = x(y0) / V x , gun withdrawal time T2 = x(y e ) / V x , y0, y e are the positions of the starting point and the ending point respectively. With time T s =T1+T2, which is the total time of advancing and retreating.

[0139] 4) Full operation time T 总 =T U +T s ;

[0140] 5) Accompanying distance Y s =T s *V s ;

[0141] 6) Z direction reciprocating stroke Z D =Dd, reciprocating time T z =Z D / V z , reciprocating times τ = T U / T z ;

[0142] 7) Powder flow rate of a single powder gun Q = ρ*δ*z max *V s / (μ*n), z max is the maximum height of the inner cavity;

[0143] 8) Total powder consumption after spraying the entire surface M = n*Q*T U .

[0144] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A large cabinet inner and outer wall powder spraying system, characterized in that: It includes a spray booth, an automatic spray system, a conveying system and a spray room; the spray booth is arranged in the spray room; the conveying system is installed in the spray room; the automatic spray system is installed in the spray booth, and includes spray unit 1, spray unit 2, spray unit 3, spray unit 4, spray unit 5, spray unit 6, spray unit 7, spray unit 8 and spray unit 9; spray unit 1 includes a spray gun driving mechanism 1, on which a spray gun is installed; spray unit 2 includes a spray gun driving mechanism 2, on which a spray gun is installed, and the spray gun driving mechanism 2 can drive the spray gun to move on the z-axis, the y-axis and the x-axis, and can drive the spray gun to rotate; The spraying unit three includes a spray gun driving mechanism three, a spray gun is installed on the spray gun driving mechanism three, and the spray gun driving mechanism three can drive the spray gun to move on the z-axis, y-axis and x-axis; the spraying unit four includes a spray gun driving mechanism four, a spray gun is installed on the spray gun driving mechanism four, and the spray gun driving mechanism four can drive the spray gun to move on the z-axis, y-axis and x-axis; the spraying unit five includes a spray gun driving mechanism five, a spray gun is installed on the spray gun driving mechanism five, and the spray gun driving mechanism five can drive the spray gun to move on the z-axis, y-axis and x-axis; the spraying unit six includes a spray gun driving mechanism six, a spray gun is installed on the spray gun driving mechanism six, and the spray gun driving mechanism six can drive the spray gun to move on the z-axis and x-axis; the spraying unit seven includes a spray gun driving mechanism seven, a spray gun is installed on the spray gun driving mechanism seven, and the spray gun driving mechanism seven can drive the spray gun to move on the z-axis, y-axis and x-axis, and can drive the spray gun to rotate; The spraying unit 8 comprises a spray gun driving mechanism 8, on which a spray gun is mounted, and the spray gun driving mechanism 8 can drive the spray gun to move on the x-axis and can drive the spray gun to rotate; The spraying unit 9 includes a spray gun driving mechanism 9, on which a spray gun is installed. The spray gun driving mechanism 9 can drive the spray gun to move on the x-axis and the z-axis.

2. The large cabinet workpiece inner and outer wall powder spraying system according to claim 1 is characterized in that: It also includes a powder supply system, which includes a powder bag powder supply device and a mixed powder supply device; the powder bag powder supply device includes an electric hoist, a weighing sensor, a fixed frame, a balancing bracket, a powder bag, a discharge valve, a fluidized powder barrel, a new powder delivery pump and a vibrator; the weighing sensor is installed on the fixed frame; the electric hoist is installed on the weighing sensor; the balancing bracket is installed on the electric hoist; the powder bag is installed on the balancing bracket; the inlet of the discharge valve is connected to the outlet of the powder bag; the outlet of the discharge valve is connected to the vibrator, and the vibrator is connected to the fluidized powder barrel; the fluidized powder barrel is provided with a new powder The mixing powder supply device comprises a mixing powder barrel, a mixing powder conveying pump, an old powder pipeline, a new powder pipeline, a powder mixer, a cyclone separator and a rotary screen; the inlet of the new powder pipeline is connected to the new powder conveying pump, and the outlet is connected to the inlet of the powder mixer; the inlet of the old powder pipeline is connected to the cyclone separator, and the outlet is connected to the inlet of the powder mixer; the mixed powder outlet of the powder mixer is connected to the inlet of the rotary screen; the small particle outlet of the rotary screen is connected to the inlet of the mixing powder barrel; a mixing powder conveying pump is installed on the mixing powder barrel, and the mixing powder conveying pump is connected to the spray gun.

3. The large cabinet workpiece inner and outer wall powder spraying system according to claim 2 is characterized in that: The powder bag powder supply device also includes a movable bracket, and the discharge valve, the vibrator and the fluidized powder barrel are all installed on the movable bracket.

4. The large cabinet workpiece inner and outer wall powder spraying system according to claim 1 is characterized in that: Manual re-spraying systems are installed at the entrance and exit of the spraying room.

5. The large cabinet workpiece inner and outer wall powder spraying system according to claim 1 is characterized in that: A detection system is provided at the entrance of the spray booth.

6. A working method of a large cabinet workpiece inner and outer wall powder spraying system according to any one of claims 1 to 5, wherein the cabinet workpiece comprises a frame, a top plate, a front end plate, an inner end plate, a bottom plate, a rear end plate and a back plate; the top plate is mounted on the top of the frame, the front end plate is mounted on the front end face of the frame, the inner end plate is mounted on the middle of the frame, the bottom plate is mounted on the bottom of the frame, the rear end plate is mounted on the rear end face of the frame, and the back plate is mounted on the back of the frame; a bottom plate groove is provided on the outer side face of the bottom plate; a top crossbeam is provided in the middle of the top of the frame, a column channel steel is provided in the middle, a rear end face channel steel is provided on the rear end face, a front end face channel steel is provided on the front end face, and an intermediate crossbeam is provided on the column channel steel; a top plate weld is provided between the bottom of the top plate and the frame; it is characterized in that: The process includes the following: (1) The conveying system transports the cabinet workpiece into the spraying room; (2) The conveying system then transports the cabinet workpiece to the spraying room, where the spraying operation is carried out: (21) Spraying unit - spraying the top plate weld and top beam of the cabinet workpiece; (22) The spray unit 2 sprays the groove position of the front end channel steel and the rear end channel steel of the cabinet workpiece, as well as the bottom position of the middle beam; when the front end channel steel and the rear end channel steel of the cabinet workpiece run to the spraying starting point, the spray gun driving mechanism 2 starts to drive the spray gun to move in the y direction, and at the same time moves to the rear side of the corresponding channel steel in the x direction and opens the spray gun, and then reciprocates in the z direction; when the middle beam of the cabinet workpiece runs to the spraying starting point, the spray gun driving mechanism 2 starts to drive the spray gun to move in the y direction, and at the same time moves to the bottom of the middle beam in the x direction, then opens and rotates the spray gun, and then reciprocates in the x direction; after completing the powder spraying operation, stop the powder spraying; (23) The spraying unit 3 sprays the front end plate, the inner end plate and the rear end plate of the cabinet workpiece; when a certain end plate of the cabinet workpiece moves to the starting point of spraying, the spray gun driving mechanism 3 starts to drive the spray gun to move in the y direction and simultaneously moves in the x direction to the innermost side of the end plate, then opens the spray gun, and the spray gun reciprocates in the z direction and simultaneously retreats in the x direction to complete the spraying of the entire end plate; after the powder spraying operation of the end plate is completed, the powder spraying is stopped; (24) The spray unit 4 sprays the groove position of the column channel steel of the cabinet workpiece; when a column channel steel of the cabinet workpiece runs to the starting point of spraying, the spray gun driving mechanism 4 starts to drive the spray gun to move in the y direction, and at the same time moves in the x direction to the side and rear of the column channel steel, and then opens the spray gun and reciprocates in the z direction. After completing the powder spraying operation of a single column channel steel, the spray gun driving mechanism 4 withdraws to its original position and sprays another column channel steel; (25) Spraying unit 5 sprays the inner side of the back plate of the cabinet workpiece; when the cabinet workpiece moves to the spraying starting point, the spray gun driving mechanism starts to drive the spray gun to move in the y direction, and at the same time moves in the x direction to the inner side of the back plate, and then opens the spray gun and reciprocates in the z direction. After completing the inner side operation of the back plate, the spraying is stopped; (26) Spraying unit 6 sprays the top plate outer part and the bottom plate outer part of the cabinet workpiece; when the cabinet workpiece moves to the spraying starting point, the spray gun starts spraying powder and stops spraying powder after the operation is completed; (27) The spray unit 7 sprays the top plate and bottom plate of the cabinet workpiece; when the cabinet workpiece moves to the spray starting point, the spray gun driving mechanism 7 starts to drive the spray gun to move in the y direction and the z direction, and the spray gun moves to the bottom of the top plate and the top of the bottom plate, and then the spray gun is turned on, and the spray gun reciprocates along the x direction, and the spraying is stopped after the powder spraying operation is completed; (28) The spray unit eight sprays the bottom plate groove position of the cabinet workpiece; when the cabinet workpiece is detected, the spray gun is turned on and the bottom plate groove is sprayed, and the spray gun driving mechanism eight drives the spray gun to rotate and swing, and when the cabinet workpiece completes the powder spraying operation and leaves, the powder spraying is stopped; (29) The spray unit 9 sprays the outer position of the back plate of the cabinet workpiece; when the cabinet workpiece is detected, the spray gun driving mechanism 9 causes the spray gun to move along the x direction to the powder spraying position, turns on the spray gun, and the spray gun driving mechanism 9 starts to drive the spray gun to reciprocate in the z direction. When the cabinet workpiece completes the powder spraying operation and leaves, the powder spraying is stopped; (3) The conveying system transports the cabinet workpiece out of the spraying room.

7. The working method according to claim 6, characterized in that: During spraying, the action of the automatic spraying system is controlled by the control system; the control instructions of the automatic spraying system are set in the control system, and the control instructions include synchronous accompanying instructions, axis positioning instructions, multi-axis motion instructions, waiting instructions, spray gun switch instructions and spray gun parameter instructions; the synchronous accompanying instructions control the corresponding spray gun drive mechanism and the cabinet workpiece to move at the same speed in the y-axis motion direction; the axis positioning instructions control the speed and target position of the corresponding motion axis of the spray gun drive mechanism; the multi-axis motion instructions control the coordinated motion process of multiple axes of the spray gun drive mechanism, and set the parameters such as the upstroke, downstroke and speed of each axis; the waiting instructions are used to control the single axis of the spray gun drive mechanism to pause during operation, and continue to move after the trigger condition is met, supporting three situations: time trigger, displacement trigger and signal trigger; the spray gun switch instruction controls the opening and closing of the corresponding spray gun; the spray gun parameter instructions control the voltage, current, powder output and total gas volume of the corresponding spray gun.

8. The working method according to claim 6, characterized in that: The conveying system uses the encoder to measure the displacement value of the cabinet workpiece relative to the origin in the direction of travel in real time, recorded as the y value; scans the depth of the inner cavity of the cabinet workpiece 11 and the height of the cabinet workpiece, recorded as the x value and z value, and forms a (x, y, z) data table. Each row of data corresponds to a cross-sectional data of the cabinet workpiece. The y value is used to determine the actual position where the workpiece has reached. When this cross-section runs to the starting position defined by the automatic spraying system, the control calculates the 3D size of the inner cavity of the cabinet workpiece according to its x value and z value, and calculates the operating parameters of the spray gun.

9. The working method according to claim 6, 7 or 8, characterized in that: Spraying unit 3 controls the spray gun to extend in and out in the x direction through its advance and retreat axis, and controls the spray gun to rise and fall in the z direction through its lifting axis to perform spraying operation. The number of reciprocating times of its in and out is defined as τ, which affects the powder flow rate. The more times, the smaller the powder flow rate requirement. The spray control of spray unit 3 is to calculate the operation time of each control axis, total powder consumption and other data by combining process data, actual equipment property parameters and powder property data, and then calculate the powder flow rate of a single spray gun by total powder consumption; process data includes spray thickness, length, height, reciprocating times τ; actual equipment property parameters include anti-collision gun safety distance S d , Chain speed V s , the speed V of the advance and retreat axis in the x direction x , the speed V of the lifting axis in the z direction z , gun distance D, number of guns n, and coverage diameter d of the spray gun 200; powder property data include powder loading rate μ and powder density ρ; The calculation of each parameter in spraying control is as follows: 1) With speed V y =V s , because the spray gun sprays in the process of advancing and retreating in the x direction, during which the y direction remains stationary relative to the workpiece through accompanying movement; 2) Single entry or exit time T1 = x(y t ) / V x ,y t is the y value corresponding to each end plate, x(y t ) is the depth value of the end plate in the x direction; 3) End plate area S = x(y t )*z(y t ), z(y t ) is the height of the end plate in the z direction; 4) With time T s =2*τ*T1; 5) Total operation time Ttotal = T s ; 6) Accompanying distance Y s =T s *V s ; 7) Total powder consumption after spraying the entire surface M = ρ*δ*S / μ; 8) Powder flow rate of a single powder gun 10. The working method according to claim 6, 7 or 8, characterized in that: The spray unit 5 controls the spray gun to extend in and out in the x direction through its advance and retreat axis, and controls the spray gun to rise and fall in the z direction through its lifting axis to perform spraying operations. The accompanying movement of the spray unit 5 in the y direction only exists in the process of advancing and retracting the gun, and no spraying operation is performed during the process of advancing and retracting the gun. During the powder spraying process, the spray unit 5 is stationary in the y direction. Therefore, the spraying control of the spray unit 5 is calculated by combining the process data, the actual property parameters of the equipment and the powder property data to obtain the operation time, powder output flow rate and other data of each control axis, and then the total powder consumption is calculated by the powder output flow rate; the process data includes spray thickness, length, and height; the actual property parameters of the equipment include the anti-collision gun safety distance S d , Chain speed V s , the speed V of the advance and retreat axis in the x direction x , the speed V of the lifting axis in the z direction z , gun distance D, number of guns n, and coverage diameter d of the spray gun; powder property data include powder loading rate μ and powder density ρ; The calculation of each parameter in spraying control is as follows: 1) Accompanying shaft speed V y =V s Because it takes time for the spray gun 200 to extend into and out of the inner cavity, the spray gun is kept in sync with the workpiece in the y direction during the extension and withdrawal process, and ends when it is in place. Then start spraying, so as to ensure that the starting position of spraying is relatively fixed and will not hit the outer contour when exiting; 2) Effective static operation time T U =(LS d *2) / V s , this time is the effective spraying operation time, The time of advancing and retreating the gun is not included; 3) Gun feed time T1 = x(y0) / V x , gun withdrawal time T $ =x(y ％ ) / V x , y0, y ％ are the positions of the starting point and the ending point respectively; accompanied by the time T s =T1+T $ , that is, the total time of advancing and retreating; 4) Total operation time Ttotal = T U +T s ; 5) Accompanying distance Y s =T s *V s ; 6) Reciprocating stroke in z direction' ( =)-*, round trip time T z =' ( / V z , reciprocating times τ = T U / T z ; 7) Powder flow rate of a single powder gun Q = ρ*δ*+ ,-x *V s / (μ*.),+ ,-x is the maximum height of the inner cavity; 8) Total powder consumption after spraying the entire surface M = n*Q*T U .

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