Automatic paint spraying device for metal disc and paint spraying method thereof

Abstract

The invention relates to the technical field of disc paint spraying, in particular to an automatic paint spraying device for a metal disc and a paint spraying method thereof.The device comprises a box body and further comprises a linear motor, a spraying part, an air cylinder, a supporting table, a driving part and a control part, and the linear motor is arranged at the upper end of the interior of the box body; the spraying part comprises a spraying pipe, an automatic flow control valve is connected to the spraying pipe in series, a spraying head is arranged at one end of the spraying pipe and arranged on a workbench of the linear motor, a rectangular nozzle is arranged on the spraying head, the paint surface sprayed by the rectangular nozzle is rectangular, and the length of the rectangle in the moving direction of the linear motor is L; the air cylinder is arranged in the box body, and the supporting table is rotationally arranged on a telescopic rod of the air cylinder. The driving part is in transmission connection with the supporting table, and the control part adjusts the flow of the automatic flow control valve according to the flow Q (t) calculated through a formula. And the paint spraying flow can be calculated and adjusted in real time, so that the constant paint spraying amount in unit area is realized, and the effect of improving the paint spraying uniformity is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of disc painting, and in particular to an automatic metal disc painting device and a painting method thereof. Background Art

[0002] At present, when metal discs are sprayed with paint, it is usually done manually. However, this spraying method is very harmful to personnel, so some automatic spraying devices are also designed on the market.

[0003] The patent with application number 201810090822.1 discloses a device for painting disc hardware, including a base, a driving motor and a workbench, wherein the driving motor is arranged on the base, the output end of the driving motor is connected to the rotating shaft A, the lower end of the rotating shaft A is provided with a pulley A, the bottom of the workbench is connected to the rotating shaft B, the rotating shaft B is connected to the base through a bearing seat, the rotating shaft B is sleeved with a pulley B, a double-axis motor is arranged at the bottom of the inner cavity of the workbench, both ends of the double-axis motor are connected to screw rods, a moving block is sleeved on the screw rod, a sliding block is arranged at the bottom of the moving block, a slide groove is arranged at the bottom of the inner cavity of the workbench, the moving block is placed in the slide groove through the slider, a clamping block is arranged on the top of the moving block, the clamping block passes through the top of the workbench and extends to the top of the workbench, a right bracket is arranged on the right side above the base, a top bracket is arranged on the top of the right bracket, a slide rail is arranged at the bottom of the top bracket, a slide rail is arranged at the bottom of the slide rail, a slide block is arranged at the bottom of the slide block, a gear is arranged at the top of the rotating shaft A, and an electric push rod is arranged at the left end of the rack.

[0004] The inventors found that the above device has some shortcomings. For example, the workbench rotates when working, and the linear speeds of the parts of the disc at different distances from the center of the circle are different. In this way, the paint is not sprayed evenly during the normal painting process. Summary of the invention

[0005] In view of this, the purpose of the present invention is to propose a metal disc automatic painting device and a painting method thereof, so as to solve the problem that the workbench currently rotates when working, and the linear speeds of parts of the disc at different distances from the center of the disc are different, so that the paint is not sprayed evenly during the normal painting process.

[0006] Based on the above purpose, the present invention provides a metal disc automatic painting device, including a box body, and also includes: a linear motor, a spraying part, a cylinder, a support platform, a driving part and a control part, wherein:

[0007] The linear motor is installed at the upper end of the box body;

[0008] The spraying part comprises a spray pipe, an automatic flow control valve is connected in series to the spray pipe, a spray head is arranged at one end of the spray pipe, the spray head is arranged on the working table of the linear motor, a rectangular nozzle is arranged on the spray head, the paint surface sprayed by the rectangular nozzle is in a rectangular shape, and the length of the rectangle along the moving direction of the linear motor is L;

[0009] The cylinder is arranged in the box, and the support platform is rotatably arranged on the telescopic rod of the cylinder;

[0010] The driving part is in transmission connection with the supporting platform, and is used for driving the supporting platform to rotate;

[0011] The metal disc is placed at the center of the support platform, and the linear motor drives the nozzle to move from the edge of the metal disc to the center at a speed v. The control unit adjusts the flow rate of the automatic flow control valve by the flow rate Q(t) calculated by the following formula:

[0012]

[0013] in is a constant, A(t) is the area covered by the paint at time t, θ(t)=ωt is the angle that the disk rotates at time t, ω is the rotation speed of the metal disk, and at time t, the rectangular spray paint area has moved a distance of vt, so its distance from the center of the circle is r-vt, where r is the radius of the metal disk.

[0014] Optionally, the driving unit includes a first motor, the first motor is provided with a driving gear, the driving gear is meshed with a driven gear, and the driven gear is fixedly sleeved on the lower end of the support platform.

[0015] Optionally, the device further comprises a cleaning unit, which is disposed on the support platform and is used for brushing and cleaning the metal disc.

[0016] Optionally, the cleaning part includes a first electric cylinder arranged on the linear motor workbench, a suction cup is provided on the telescopic rod facing downward, the support platform includes an upper layer and a lower layer, a cavity is formed between the upper layer and the lower layer, a column is provided in the cavity, a cleaning disc is slidably connected to the column, a plurality of groups of cleaning brushes are distributed in an annular manner on the cleaning disc, the upper layer is provided with a through hole for the cleaning brush to pass through, the lower layer is provided with an air flow channel, a valve is provided at one end of the air flow channel, the air flow channel is connected to an airbag, the airbag is located at the bottom of the cleaning disc, a water pipe is provided in the box body, and the water pipe faces the top of the upper layer.

[0017] Optionally, the device further comprises a drying section, and the drying section is used to provide hot air flow into the cavity.

[0018] Optionally, the drying section includes a hot air source, the hot air source is connected to an air pipe, the cavity is connected to a docking joint, one end of the air pipe is detachably connected to the docking joint, and the hot air flow can reach the metal disc after passing through the cavity and multiple through holes.

[0019] Optionally, the device further comprises two groups of flipping parts, which are respectively arranged on both sides of the support platform, and the two groups of flipping parts are used to flip the metal disc.

[0020] Optionally, the flipping part includes a bracket arranged to slide on one side of the support platform, a second electric cylinder is provided on one side of the bracket, a rotating shaft is rotatably connected to the bracket, a clamp is provided at one end of the rotating shaft, a first gear is provided at the other end of one of the rotating shafts, the first gear is meshed with a second gear, and the second gear is transmission-connected to a second motor.

[0021] Based on the same invention, the present invention also provides a painting method of a metal disc automatic painting device, comprising:

[0022] Place the metal disc at the center of the support table, and control the linear motor to drive the nozzle to move to the edge of the metal disc;

[0023] The driving part drives the support platform to rotate, and then drives the metal disc on the support platform to rotate. The spray head sprays the paint through the rectangular nozzle, and the linear motor keeps working to drive the spray head to move toward the center of the metal disc.

[0024] During the movement, the control unit adjusts the flow rate of the automatic flow control valve by the flow rate Q(t) calculated by the following formula:

[0025]

[0026] in is a constant, A(t) is the area covered by the paint at time t, θ(t)=ωt is the angle that the disk rotates at time t, ω is the rotation speed of the metal disk, and at time t, the rectangular spray paint area has moved a distance of vt, so its distance from the center of the circle is r-vt, where r is the radius of the metal disk.

[0027] When using this device to spray paint on a metal disc, the metal disc is placed at the center of the support platform, the linear motor is controlled to drive the nozzle to move to the edge of the metal disc, the support platform is driven to rotate by the driving unit, and then the metal disc on the support platform is driven to rotate, the nozzle sprays the paint through the rectangular nozzle, and the linear motor continues to work to drive the nozzle to move to the center of the metal disc. During the movement, the control unit adjusts the flow rate of the automatic flow control valve by the flow rate Q(t) calculated by the following formula:

[0028]

[0029] By setting a constant k, k represents the constant amount of paint sprayed per unit area on the metal disc. As the nozzle moves over time, the above formula is used to continuously calculate and adjust the flow rate of the paint sprayed, thereby achieving a constant amount of paint sprayed per unit area, thereby achieving the effect of improving the uniformity of the paint spraying.

[0030] From the above, it can be seen that the present invention designs a calculation method for the flow rate Q(t) according to the characteristics of the device. The controller can obtain a real-time paint flow value according to the calculation formula of the flow rate Q(t), so that the flow rate of the paint spraying can be adjusted in real time through the automatic flow control valve, thereby achieving a constant amount of paint spraying per unit area, thereby achieving the effect of improving the uniformity of the paint spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 The structure of the paint spraying device according to the embodiment of the present invention is shown in FIG. Figure 1 ;

[0033] Figure 2 The structure of the paint spraying device according to the embodiment of the present invention is shown in FIG. Figure 2 ;

[0034] Figure 3 for Figure 2 A top view of the middle and upper levels;

[0035] Figure 4 for Figure 2 Top view of the left center splint.

[0036] The numbers in the figure are:

[0037] 1. Box; 2. Linear motor; 3. Cylinder; 4. Support platform; 5. Nozzle; 6. Nozzle; 7. First motor; 8. Driving gear; 9. Driven gear; 10. First electric cylinder; 11. Suction cup; 12. Upper layer; 13. Lower layer; 14. Cleaning plate; 15. Cleaning brush; 16. Through hole; 17. Air flow channel; 18. Valve; 19. Air bag; 20. Water pipe; 21. Butt joint; 22. Bracket; 23. Second electric cylinder; 24. Rotating shaft; 25. Clamp; 26. First gear; 27. Second gear; 28. Second motor. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0039] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] like Figure 1 As shown, a metal disc automatic painting device includes a box body 1, a linear motor 2, a spraying part, a cylinder 3, a support platform 4, a driving part and a control part, wherein:

[0041] The linear motor 2 is installed at the upper end of the box 1;

[0042] The spraying part includes a spray pipe 5, an automatic flow control valve is connected in series to the spray pipe 5, a spray head 6 is provided at one end of the spray pipe 5, the spray head 6 is arranged on the working table of the linear motor 2, a rectangular nozzle is provided on the spray head 6, the paint surface sprayed by the rectangular nozzle is in a rectangular shape, and the length of the rectangle along the moving direction of the linear motor 2 is L;

[0043] The cylinder 3 is arranged in the box body 1, and the support platform 4 is rotatably arranged on the telescopic rod of the cylinder 3;

[0044] The driving part is in transmission connection with the support platform 4, and is used to drive the support platform 4 to rotate;

[0045] The metal disc is placed at the center of the support platform 4, and the linear motor 2 drives the nozzle 6 to move from the edge of the metal disc to the center at a speed v. The control unit adjusts the flow rate of the automatic flow control valve by the flow rate Q(t) calculated by the following formula:

[0046]

[0047] in is a constant, A(t) is the area covered by the paint at time t, θ(t)=ωt is the angle that the disk rotates at time t, ω is the rotation speed of the metal disk, and at time t, the rectangular spray paint area has moved a distance of vt, so its distance from the center of the circle is r-vt, where r is the radius of the metal disk.

[0048] When the device is used to spray paint on a metal disc, the metal disc is placed at the center of the support platform 4, the linear motor 2 is controlled to work to drive the nozzle 6 to move to the edge of the metal disc, the support platform 4 is driven to rotate by the driving unit, and then the metal disc on the support platform 4 is driven to rotate, and the nozzle 6 sprays the paint through the rectangular nozzle, and the linear motor 2 continues to work to drive the nozzle 6 to move toward the center of the metal disc. During the movement, the control unit adjusts the flow rate of the automatic flow control valve by the flow rate Q(t) calculated by the following formula:

[0049]

[0050] By setting a constant k, k represents a constant amount of paint sprayed per unit area on the metal disc, the nozzle 6 continuously calculates and adjusts the flow rate of the paint sprayed by the above formula as it moves over time, thereby achieving a constant amount of paint sprayed per unit area, thereby achieving the effect of improving the uniformity of the paint spraying.

[0051] From the above, it can be seen that the present invention can calculate and adjust the flow rate of paint spraying in real time by constructing a calculation formula for the flow rate Q(t), thereby achieving a constant amount of paint spraying per unit area, thereby achieving the effect of improving the uniformity of paint spraying.

[0052] In some embodiments, the driving unit includes a first motor 7, on which a driving gear 8 is provided, and the driving gear 8 is meshed with a driven gear 9, and the driven gear 9 is fixedly sleeved on the lower end of the support platform 4. During operation, the first motor 7 drives the driving gear 8 to rotate, and the driving gear 8 drives the driven gear 9 to rotate, thereby driving the support platform 4 to rotate, and the support platform 4 drives the metal disc on the support platform 4 to continuously rotate at a rotation speed of ω during the painting process.

[0053] In some embodiments, the device further comprises a cleaning unit, which is arranged on the support platform 4 and is used to scrub and clean the metal disc. The metal disc needs to be kept clean before painting, and for this purpose, the present invention designs a cleaning unit.

[0054] like Figure 2 and Figure 3As shown, optionally, the cleaning part includes a first electric cylinder 10 arranged on the workbench of the linear motor 2, and the first electric cylinder 10 is provided with a suction cup 11 on the telescopic rod facing downward, the support platform 4 includes an upper layer 12 and a lower layer 13, and a cavity is formed between the upper layer 12 and the lower layer 13, and a column is provided in the cavity, and a cleaning disc 14 is slidably connected to the column, and a plurality of groups of cleaning brushes 15 are distributed in an annular manner on the cleaning disc 14, the upper layer 12 is provided with a through hole 16 for the cleaning brush 15 to pass through, the lower layer 13 is provided with an air flow channel 17, a valve 18 is provided at one end of the air flow channel 17, and the air flow channel 17 is connected to an air bag 19, and the air bag 19 is located at the bottom of the cleaning disc 14, and a water pipe 20 is provided in the box body 1, and the water pipe 20 faces the top of the upper layer 12.

[0055] In this embodiment, when the metal disc needs to be cleaned by the cleaning part, the metal disc is sucked up by the suction cup 11, and then the valve 18 is opened to connect the external inflation mechanism with the airflow channel 17. The external inflation mechanism inflates the airbag 19 through the airflow channel 17. The inflated airbag 19 drives the cleaning disc 14 to move upward, so that the cleaning brush 15 passes through the through hole 16. Then the valve 18 is closed, and the external inflation mechanism is removed. The first electric cylinder 10 drives the metal disc to descend, so that the bottom surface of the metal disc contacts the cleaning brush 15. Then the support platform 4 is driven to rotate through the driving part, and then the cleaning disc 14 is driven to rotate. The metal disc is scrubbed by the rotating cleaning brush 15. During the scrubbing process, the linear motor 2 can also be used to drive the metal disc to move horizontally. The relative movement with the cleaning brush 15 further improves the scrubbing effect. During the scrubbing process, the water pipe 20 provides the metal disc with clean water required for the scrubbing process.

[0056] In some embodiments, the device further comprises a drying section, which is used to provide a hot air flow into the cavity. Optionally, the drying section comprises a hot air source, which is connected to an air pipe, and the cavity is connected to a docking joint 21, one end of the air pipe is detachably connected to the docking joint 21, and the hot air flow can pass through the cavity and the plurality of through holes 16 and reach the metal disc.

[0057] like Figure 2 As shown, after the painting is completed, the paint needs to be dried. When drying is required, the air pipe is connected to the docking joint 21, and the hot steam source provides hot air flow through the docking joint 21 to reach the cavity, thereby reaching the bottom of the metal disc through multiple through holes 16, and the heat then reaches the paint surface through the heat conduction of the metal disc to dry the paint. The multiple through holes 16 can just achieve the effect of uniform wind, improve the uniformity of heating the metal disc, and thus improve the uniformity of heating the paint during drying. In this embodiment, the drying part and the cleaning part share some features, making the overall structure of the device more compact and simple. At the same time, the drying part can also dry the cleaned metal disc.

[0058] like Figure 2 and Figure 4 As shown, in some embodiments, the device further includes two groups of flipping parts, which are respectively arranged on both sides of the support platform 4, and the two groups of flipping parts are used to flip the metal disc. Optionally, the flipping part includes a bracket 22 that is arranged to slide on one side of the support platform 4, and a second electric cylinder 23 is provided on one side of the bracket 22. A rotating shaft 24 is rotatably connected to the bracket 22, and a clamping plate 25 is provided at one end of the rotating shaft 24. A first gear 26 is provided at the other end of one of the rotating shafts 24, and the first gear 26 is meshed with a second gear 27, and the second gear 27 is transmission-connected to a second motor 28.

[0059] When the metal disc needs to be flipped, the second electric cylinder 23 drives the bracket 22 to move toward the metal disc until the two clamps 25 clamp the metal disc, and the cylinder 3 is controlled to shorten, driving the support platform 4 to move downward, thereby giving the metal disc enough space to flip. Then the second motor 28 drives the second gear 27 to rotate, the second gear 27 drives the first gear 26 to rotate, the first gear 26 drives the rotating shaft 24 to rotate, and then drives the metal disc to rotate through the clamps 25 to realize the flipping operation of the metal disc.

[0060] In order to further implement the present invention, the present invention also provides a painting method of a metal disc automatic painting device, comprising:

[0061] Place the metal disc at the center of the support platform 4, and control the linear motor 2 to drive the nozzle 6 to move to the edge of the metal disc;

[0062] The driving part drives the support platform 4 to rotate, thereby driving the metal disc on the support platform 4 to rotate, and the spray head 6 sprays the paint through the rectangular nozzle, and the linear motor 2 continues to work to drive the spray head 6 to move toward the center of the metal disc;

[0063] During the movement, the control unit adjusts the flow rate of the automatic flow control valve by the flow rate Q(t) calculated by the following formula:

[0064]

[0065] in is a constant, A(t) is the area covered by the paint at time t, θ(t)=ωt is the angle that the disk rotates at time t, ω is the rotation speed of the metal disk, and at time t, the rectangular spray paint area has moved a distance of vt, so its distance from the center of the circle is r-vt, where r is the radius of the metal disk.

[0066] This method can calculate and adjust the flow rate of paint spraying in real time by constructing a calculation formula for the flow rate Q(t), thereby achieving a constant amount of paint sprayed per unit area, thereby achieving the effect of improving the uniformity of paint spraying.

[0067] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or in different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the above aspects of the present invention, which are not provided in detail for the sake of simplicity.

[0068] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A metal disc automatic painting device, comprising a housing (1), characterized in that: Also includes: A linear motor (2), a spraying unit, a cylinder (3), a support platform (4), a driving unit and a control unit, wherein: The linear motor (2) is installed at the upper end of the box (1); The spraying part comprises a spray pipe (5), an automatic flow control valve is connected in series to the spray pipe (5), a spray head (6) is provided at one end of the spray pipe (5), the spray head (6) is arranged on the working table of the linear motor (2), a rectangular nozzle is provided on the spray head (6), the paint surface sprayed by the rectangular nozzle is in a rectangular shape, and the length of the rectangle along the moving direction of the linear motor (2) is L; The cylinder (3) is arranged in the box (1), and the support platform (4) is rotatably arranged on the telescopic rod of the cylinder (3); The driving part is in driving connection with the support platform (4) and is used for driving the support platform (4) to rotate; The metal disc is placed at the center of the support platform (4), the linear motor (2) drives the nozzle (6) to move from the edge of the metal disc to the center at a speed v, and the control unit adjusts the flow rate of the automatic flow control valve according to the flow rate Q(t) calculated by the following formula: in is a constant, A(t) is the area covered by the paint at time t, θ(t)=ωt is the angle that the disk rotates at time t, ω is the rotation speed of the metal disk, and at time t, the rectangular spray paint area has moved a distance of vt, so its distance from the center of the circle is r-vt, where r is the radius of the metal disk.

2. The metal disc automatic painting device according to claim 1 is characterized in that: The driving part comprises a first motor (7), the first motor (7) is provided with a driving gear (8), the driving gear (8) is meshed with a driven gear (9), and the driven gear (9) is fixedly sleeved on the lower end of the support platform (4).

3. The metal disc automatic painting device according to claim 1 is characterized in that: The device also comprises a cleaning part, which is arranged on the support platform (4) and is used for brushing and cleaning the metal disc.

4. The metal disc automatic painting device according to claim 3 is characterized in that: The cleaning part comprises a first electric cylinder (10) arranged on the workbench of the linear motor (2), a suction cup (11) being provided on a telescopic rod facing downwards of the first electric cylinder (10), the support platform (4) comprising an upper layer (12) and a lower layer (13), a cavity being formed between the upper layer (12) and the lower layer (13), a column being provided in the cavity, a cleaning disc (14) being slidably connected to the column, a plurality of groups of cleaning brushes (15) being distributed in an annular manner on the cleaning disc (14), the upper layer (12) being provided with a through hole (16) for the cleaning brush (15) to pass through, the lower layer (13) being provided with an air flow channel (17), a valve (18) being provided at one end of the air flow channel (17), the air flow channel (17) being connected with an air bag (19), the air bag (19) being located at the bottom of the cleaning disc (14), and a water pipe (20) being provided in the box body (1), the water pipe (20) facing the top of the upper layer (12).

5. The metal disc automatic painting device according to claim 4 is characterized in that: The device further comprises a drying part, and the drying part is used for providing a hot air flow into the cavity.

6. The metal disc automatic painting device according to claim 5, characterized in that: The drying section comprises a hot air source, the hot air source is connected to an air pipe, the cavity is connected to a docking joint (21), one end of the air pipe is detachably connected to the docking joint (21), and the hot air flow can pass through the cavity and the plurality of through holes (16) and then reach the metal disc.

7. The metal disc automatic painting device according to claim 1, characterized in that: The device also includes two groups of turning parts, which are respectively arranged on both sides of the support platform (4), and are used to turn over the metal disc.

8. The metal disc automatic painting device according to claim 7, characterized in that: The flipping part comprises a bracket (22) arranged to slide on one side of the support platform (4), a second electric cylinder (23) is provided on one side of the bracket (22), a rotating shaft (24) is rotatably connected to the bracket (22), a clamping plate (25) is provided at one end of the rotating shaft (24), a first gear (26) is provided at the other end of one of the rotating shafts (24), the first gear (26) is meshed with a second gear (27), and the second gear (27) is transmission-connected to a second motor (28).

9. A painting method for a metal disc automatic painting device according to claim 1, characterized in that: include: The metal disc is placed at the center of the support platform (4), and the linear motor (2) is controlled to drive the nozzle (6) to move to the edge of the metal disc; The driving unit drives the support platform (4) to rotate, thereby driving the metal disc on the support platform (4) to rotate, and the spray head (6) sprays the paint through the rectangular nozzle, and the linear motor (2) continues to work to drive the spray head (6) to move toward the center of the metal disc; During the movement, the control unit adjusts the flow rate of the automatic flow control valve by the flow rate Q(t) calculated by the following formula: in is a constant, A(t) is the area covered by the paint at time t, θ(t)=ωt is the angle that the disk rotates at time t, ω is the rotation speed of the metal disk, and at time t, the rectangular spray paint area has moved a distance of vt, so its distance from the center of the circle is r-vt, where r is the radius of the metal disk.

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