Automobile bumper spraying equipment and spraying process

Abstract

The invention belongs to the technical field of spraying equipment, and particularly relates to automobile bumper spraying equipment and a spraying process. The automobile bumper spraying equipment comprises a spraying mechanical arm, a support and a conveyor; the paint mist collecting device further comprises a paint mist collecting mechanism, the paint mist collecting mechanism is used for recycling redundant paint mist, and the paint mist collecting mechanism is located on the movement path of the conveyor. By arranging the paint mist collecting mechanism and adopting a deposition box and a housing to cover the bumper, the space size of spraying operation is effectively reduced, the diffusion range of sprayed paint mist is reduced, the diffusion efficiency of the paint mist to the surrounding space is effectively reduced, meanwhile, external negative pressure recycling equipment is matched, and the spraying efficiency of the bumper is improved. According to the paint mist collecting device, negative pressure extraction is conducted on the space defined by the housing and the deposition box, paint mist dispersed in air is recycled through flowing of airflow, then the collecting effect on redundant paint mist is effectively enhanced, and pollution of spraying operation to the environment is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of spraying equipment, in particular to a kind of automobile bumper spraying equipment and a spraying process. Background Art

[0002] In the production process of automotive parts, components such as bumpers are usually manufactured independently. The manufacturing of bumpers is divided into several main steps according to the process flow, such as injection molding, molding, painting, and assembly. The painting process plays a decisive role in the appearance quality and durability of the bumper.

[0003] In order to improve the quality of painting and enhance the degree of automation of the painting process, the existing automobile bumper spraying production line is equipped with multiple loading and automatic spraying systems. Through the pre-set program of the staff, the spraying robot arm is controlled to spray the bumper with multiple layers to achieve a uniform and consistent coating effect. At the same time, the bumper is automatically transported to improve the degree of automation of the bumper spraying process. However, this automatic spraying system still has some limitations. For example, due to the complex shape of the bumper, in order to be able to spray the bumper comprehensively, during the spraying process, the robot arm needs to be adjusted at multiple angles, so that the movement angle and movement path of the sprayed paint mist change. Therefore, part of the paint mist is disturbed by the airflow and gravity in the air, and is deposited on the bumper transportation equipment or the ground, resulting in a serious waste phenomenon. In addition, due to the incomplete utilization of the paint mist during the painting process, the risk of environmental pollution is also increased.

[0004] In order to solve these problems, the relevant technology discloses a bumper shell paint spraying device that can detect the smoothness of the bumper surface, the application number is CN202010853727X, and a purification chamber is provided. The purification chamber is provided with a photocatalyst layer and an ultraviolet lamp, so that the exhaust gas containing paint mist generated by painting can be treated to meet the qualified exhaust gas emission standards and avoid environmental pollution. The paint mist and dust suspended in the paint spraying room are purified by the purification mechanism to avoid harm to the health of the workers caused by paint spraying. However, in actual application, due to the large paint spraying space, the efficiency of purifying the paint mist suspended in the space is low, and the recovery effect of the paint mist is poor.

[0005] In view of this, the present invention proposes an automobile bumper spraying equipment and a spraying process to solve the above technical problems. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes an automobile bumper spraying equipment and a spraying process.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the automobile bumper spraying equipment described in the present invention comprises a spraying mechanical arm, a bracket and a conveyor;

[0008] The bracket is installed on the conveyor, and is used to fix and support the bumper, and cooperate with the conveyor to transport the bumper. The spraying mechanical arm is installed on both sides of the conveyor, and the spraying mechanical arm is used to automatically spray the bumper;

[0009] It also includes a paint mist collection mechanism, which is used to recycle excess paint mist, and the paint mist collection mechanism is located on the movement path of the conveyor;

[0010] The paint mist collection mechanism includes a deposition box, a cover shell and a scraper;

[0011] The deposition box is installed under the bumper, and is used to receive paint mist. The top of the deposition box is designed to be open, and the deposition box is connected to a negative pressure recovery device through a pipeline;

[0012] The cover shell is installed at the opening of the deposition box, the cover shell is rotatably connected to the deposition box, and the cover shell and the deposition box are sleeved outside the bumper;

[0013] Scrapers are fixedly installed on both sides of the deposition box, the scrapers are in contact with the inner wall of the cover shell, and the scrapers are used to scrape the cover shell;

[0014] A combination groove is provided at the top of the cover shell. In an initial state, the end of the spray robot arm is inserted into the inner cavity of the cover shell through the combination groove. A symmetrically designed sealing sheet is fixedly installed in the combination groove, and the sealing sheet is used to close the combination groove.

[0015] Preferably, evenly distributed magnetic sheets are fixedly mounted on one side of the two sealing sheets close to each other, and the magnetic sheets of the two sealing sheets attract each other.

[0016] Preferably, the cover shell and the deposition box are divided into two halves along the conveyor movement path, movable seats are fixedly installed on both sides of the deposition box, fixed seats are installed on both sides of the conveyor movement path, electric push rods are installed on the fixed seats, and the movable seat is slidably installed on the fixed seat through the electric push rod.

[0017] Preferably, the cover shell comprises a combined plate, a semicircular plate, a cover film and a winding shaft;

[0018] The combined plates are fixedly mounted on both ends of the deposition box, and an annular groove is formed on the combined plates. The semicircular plates are slidably mounted in the annular groove. The combined plates and the semicircular plates are divided into two groups, which correspond to the two halves of the deposition box respectively.

[0019] The combined plates are all provided with winding grooves, and winding shafts are installed in the winding grooves on the same group of combined plates for common rotation;

[0020] The cover film is a flexible wear-resistant plastic film, which is wound and installed on a winding shaft, and one end of the cover film away from the winding shaft is fixedly connected to the top of the semicircular plate.

[0021] Preferably, limit strips are fixedly installed on both sides of the cover film, and evenly distributed limit buckles are fixedly installed on the combined plate. The limit buckles are all C-shaped structures, and the limit strips extend to the inside of the limit buckles.

[0022] Preferably, a transmission wheel is rotatably mounted on the bottom end of the combined plate, the semicircular plate is designed in a toothed ring shape, the transmission wheel is meshedly connected with the semicircular plate, and the transmission wheel is connected to the winding shaft through a transmission belt.

[0023] Preferably, a pressing plate is fixedly mounted on the same group of combined plates, and the pressing plates are all C-shaped structures. The pressing plates correspond to the scrapers, and the cover film runs through the gap between the pressing plates and the scrapers.

[0024] Preferably, the pressing plate comprises a plate body and a roller, wherein the roller is rotatably mounted on the plate body, and the roller is rollingly connected to the cover film.

[0025] Preferably, an elastic rope is fixedly mounted on the semicircular plate and the combined plate, and the elastic rope is used to control the initial position of the semicircular plate.

[0026] A spraying process for automobile bumper, the process comprising the following steps:

[0027] S1. Positioning: The conveyor pushes the bracket along the pre-set transportation route to transport the bumper to the spraying station, and then the electric push rod pushes the moving seat to move toward each other;

[0028] S2, Isolation: When the two moving seats move toward each other, they push the deposition box and the cover shell, which are divided into two halves, to gradually close together, thereby covering the bumper;

[0029] S3, spraying: under the control of a pre-set program, the spraying robot arm first inserts into the inner cavity of the housing through the combination slot, and then moves to spray the bumper;

[0030] S4, Recovery: After spraying, the external negative pressure recovery equipment extracts negative pressure from the deposition box and the inner cavity of the cover shell through the pipeline, and then the mobile seat moves back and forth, and the conveyor pushes the bracket to the next process.

[0031] The beneficial effects of the present invention are as follows:

[0032] 1. The automobile bumper spraying equipment and spraying process described in the present invention, by setting a paint mist collection mechanism, using a deposition box and a cover to cover the bumper, and opening a combination groove at the top of the cover, so that only the working part of the spraying robot arm is inserted into the inner cavity of the cover, and at the same time, by utilizing the rotation of the cover, the direction setting of the combination groove, etc., the spraying robot arm can operate normally, thereby effectively reducing the size of the space for the spraying operation, thereby reducing the diffusion range of the sprayed paint mist, and effectively reducing the efficiency of the paint mist diffusing into the surrounding space, and at the same time, in conjunction with an external negative pressure recovery device, negative pressure extraction is performed on the space surrounded by the cover and the deposition box, and the paint mist dispersed in the air is recovered by utilizing the flow of airflow, thereby effectively enhancing the collection effect of excess paint mist and reducing the pollution of the spraying operation to the environment.

[0033] 2. The automobile bumper spraying equipment and spraying process described in the present invention rewinds the cover film on the loose side and unfolds the cover film on the pulled side, so that the combined groove always follows the movement of the spraying robot arm until the spraying robot arm moves to the side wall of the deposition box. In actual application, as the angle occupied by the deposition box in the circumferential direction decreases, the angle occupied by the cover shell in the circumferential direction increases, so that the spraying robot arm can perform close circular spraying on the bumper. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] Figure 1 is a stereogram of the present invention;

[0036] Figure 2 It is a partial stereogram of the present invention;

[0037] Figure 3 It is a three-dimensional diagram of the paint mist collection mechanism;

[0038] Figure 4 is a stereogram of the cover film;

[0039] Figure 5 is a three-dimensional diagram of the paint mist collection mechanism after the cover film is removed;

[0040] Figure 6 yes Figure 5 A partial enlarged view of the middle part;

[0041] Figure 7 is a cross-sectional view of the paint mist collection mechanism;

[0042] Figure 8 It is the assembly drawing of the semicircular plate, the cover film and the limit strip;

[0043] Fig. 9 is a flow chart of the method of the present invention;

[0044] In the figure: 1. spraying robot arm; 11. bracket; 12. conveyor; 21. deposition box; 22. scraper; 23. combination groove; 24. sealing plate; 25. movable seat; 26. fixed seat; 27. electric push rod; 3. combination plate; 31. ring groove; 32. semicircular plate; 33. winding groove; 34. winding shaft; 35. cover film; 36. limit strip; 37. limit buckle; 4. transmission wheel; 41. transmission belt; 42. plate body; 43. roller; 5. elastic rope. DETAILED DESCRIPTION

[0045] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0046] like Figures 1 to 8 As shown, the automobile bumper spraying equipment described in the present invention includes a spraying mechanical arm 1, a bracket 11 and a conveyor 12;

[0047] The bracket 11 is installed on the conveyor 12, and the bracket 11 is used to fix and support the bumper, and cooperate with the conveyor 12 to transport the bumper. The spraying robot arm 1 is installed on both sides of the conveyor 12, and the spraying robot arm 1 is used to automatically spray the bumper;

[0048] It also includes a paint mist collection mechanism, which is used to recycle excess paint mist, and the paint mist collection mechanism is located on the movement path of the conveyor 12;

[0049] The paint mist collection mechanism includes a deposition box 21, a cover shell and a scraper 22;

[0050] The deposition box 21 is installed under the bumper. The deposition box 21 is used to receive paint mist. The top of the deposition box 21 is designed to be open. The deposition box 21 is connected to a negative pressure recovery device through a pipeline.

[0051] The cover is installed at the opening of the deposition box 21, the cover is rotatably connected to the deposition box 21, and the cover and the deposition box 21 are sleeved outside the bumper;

[0052] Scrapers 22 are fixedly installed on both sides of the deposition box 21, and the scrapers 22 are in contact with the inner wall of the housing, and the scrapers 22 are used to scrape the housing;

[0053] A combination groove 23 is provided at the top of the housing. In the initial state, the end of the spray robot arm 1 is inserted into the inner cavity of the housing through the combination groove 23. A symmetrically designed sealing sheet 24 is fixedly installed in the combination groove 23. The sealing sheet 24 is used to close the combination groove 23.

[0054] In the bumper automatic spraying production line, with the cooperation of the pre-set automation program and the spraying robot 1 and the conveyor 12, the automation degree of the bumper spraying operation can be increased. In order to reduce the waste of paint in the automatic spraying process, a paint mist collection mechanism is provided in the present invention. During the automatic spraying process, the excess paint mist is recovered and reused, thereby reducing the impact of the spraying operation on the environment while reducing the waste of resources.

[0055] Specifically, in the present invention, a conveyor 12 is installed on the ground of the bumper spraying room. The conveyor 12 can transport the bracket 11 along a predetermined route under the control of a preset program, and the bumper to be painted is installed on the bracket 11. Under the control of the preset program, the bumper is automatically transported and stopped. When the bumper is transported to the painting station, the spraying robot arms 1 installed on both sides of the conveyor 12 are also controlled by the automated program to spray the bumper in the painting station. In this process, in order to reduce the probability of paint mist drifting and leaking into the surrounding environment, before the spraying robot arm 1 operates, the deposition box 21 and the cover shell are assembled on the bracket 11, and the deposition box 21 and the cover shell are used to cover the bumper and part of the bracket 11. Then, the spraying robot arm 1 is inserted into the combination groove 23 at the top of the cover shell along a predetermined route, and the combination groove 23 extends into the inner cavity of the cover shell, and then the bumper in the inner cavity of the cover shell is sprayed. During the spraying process, Since the combination groove 23 is arranged along the axis direction of the cover shell, when the spraying robot arm 1 moves along the axis direction of the cover shell, the sealing sheet 24 in the combination groove 23 is pushed to bend, and the sealing sheet 24 separated from the spraying robot arm 1 is reset under its own elastic action, thereby sealing the combination groove 23. When the spraying robot arm 1 moves along the circumferential direction of the cover shell, the movement of the spraying robot arm 1 pushes the cover shell to move synchronously, thereby causing the cover shell and the deposition box 21 to rotate relative to each other. During the relative rotation, the scraper 22 on the deposition box 21 scrapes the inner wall of the cover shell, so that the paint liquid adhering to the inner wall of the cover shell flows along the scraper 22 into the deposition box 21. As the spraying robot arm 1 continues to operate, the spraying operation of the bumper is finally completed. At this time, the cover shell and the deposition box 21 are negatively pressure extracted through an external negative pressure recovery device. During the extraction process, the flow of the airflow entrains the paint mist, thereby causing the paint mist to move into the negative pressure recovery device, and finally the paint mist in the air is separated, recovered, and reused.

[0056] The present invention sets a paint mist collection mechanism, covers the bumper with a deposition box 21 and a cover, and opens a combination slot 23 at the top of the cover, so that only the working part of the spray robot arm 1 is inserted into the inner cavity of the cover, and at the same time, the rotation of the cover, the direction setting of the combination slot 23, etc. are utilized to enable the spray robot arm 1 to operate normally, thereby effectively reducing the size of the space for the spraying operation, thereby reducing the diffusion range of the sprayed paint mist, and effectively reducing the efficiency of the paint mist diffusing into the surrounding space. At the same time, in conjunction with an external negative pressure recovery device, negative pressure extraction is performed on the space surrounded by the cover and the deposition box 21, and the paint mist dispersed in the air is recovered by the flow of airflow, thereby effectively enhancing the collection effect of excess paint mist and reducing the pollution of the spraying operation to the environment.

[0057] As a preferred embodiment of the present invention, evenly distributed magnetic sheets are fixedly mounted on one side of the two sealing sheets 24 close to each other, and the magnetic sheets of the two sealing sheets 24 attract each other.

[0058] The arrangement of the magnetic sheets enables the sealing sheets 24 to have a tendency to approach each other. When no external force is applied, the two sealing sheets 24 have a tendency to block the combination groove 23 .

[0059] As a preferred embodiment of the present invention, the cover shell and the deposition box 21 are divided into two halves along the movement path of the conveyor 12. A movable seat 25 is fixedly installed on both sides of the deposition box 21. A fixed seat 26 is installed on both sides of the movement path of the conveyor 12. An electric push rod 27 is installed on the fixed seat 26. The movable seat 25 is slidably installed on the fixed seat 26 through the electric push rod 27.

[0060] In order to enhance the convenience of assembling the paint mist collection mechanism and the bumper, the cover shell and the deposition box 21 are divided into two halves, and the deposition box 21 is fixedly connected to the movable seat 25. When the bumper has not reached the spraying station, the electric push rod 27 is in a retracted state, thereby separating the two halves of the cover shell and the deposition box 21. When the conveyor 12 transports the bracket 11 to the spraying station, the electric push rod 27 is extended, thereby bringing the two halves of the cover shell and the deposition box 21 closer to each other, and finally forming a completed cover shell and deposition box 21. In this process, the bumper and part of the bracket 11 are covered. Then, when the spraying operation is completed, the electric push rod 27 is controlled to retract again, so that the paint mist collection mechanism can be separated from the bumper, which is convenient for transporting the sprayed bumper.

[0061] As a preferred embodiment of the present invention, the cover shell includes a combined plate 3, a semicircular plate 32, a cover film 35 and a winding shaft 34;

[0062] The combined plate 3 is fixedly mounted at both ends of the deposition box 21. The combined plate 3 is provided with an annular groove 31. The semicircular plates 32 are slidably mounted in the annular groove 31. The combined plate 3 and the semicircular plates 32 are divided into two groups, which correspond to the two halves of the deposition box 21 respectively.

[0063] The combined plates 3 are all provided with winding grooves 33, and winding shafts 34 are rotatably installed in the winding grooves 33 on the same group of combined plates 3;

[0064] The cover film 35 is a flexible wear-resistant plastic film, which is wound on the winding shaft 34 , and one end of the cover film 35 away from the winding shaft 34 is fixedly connected to the top of the semicircular plate 32 .

[0065] A transmission wheel 4 is rotatably mounted on the bottom end of the combined plate 3 . The semicircular plate 32 is designed in a toothed ring shape. The transmission wheel 4 is meshedly connected with the semicircular plate 32 . The transmission wheel 4 is connected with the winding shaft 34 through a transmission belt 41 .

[0066] In actual application, due to the presence of the bracket 11, the deposition box 21 is in a fixed state after being assembled with the bracket 11. Therefore, in order to maximize the movement direction of the spray robot arm 1, the present invention adopts a combination plate 3, a semicircular plate 32, a cover film 35 and a winding shaft 34 to form a cover shell. After the spray robot arm 1 is inserted into the combination groove 23, when the spray robot arm 1 moves along the circumferential direction of the cover shell, under the push of the spray robot arm 1, the cover film 35 moves and pulls the semicircular plate 32 fixedly connected thereto to move. Since the semicircular plate 32 is slidably installed in the annular groove 31, and the two semicircular plates 32 together form a circular ring, the movement path of the semicircular plate 32 is fixed, and then the movement path of the cover film 35 is fixed. As the cover film 35 moves, the cover film 35 on one side is Under the pulling effect, the cover film 35 on the other side gradually relaxes, and when the semicircular plate 32 rotates, the transmission wheel 4 meshed with the semicircular plate 32 rotates. Since the transmission wheel 4 is connected to the winding shaft 34 through the transmission belt 41, the winding shaft 34 is driven to rotate in the winding groove 33. During the rotation of the winding shaft 34, the cover film 35 on the loose side is rolled up and the cover film 35 on the pulling side is unfolded, so that the combined groove 23 always moves with the spraying robot arm 1 until the spraying robot arm 1 moves to the side wall of the deposition box 21. In actual application, as the angle occupied by the deposition box 21 in the circumferential direction decreases, the angle occupied by the cover shell in the circumferential direction increases, so that the spraying robot arm 1 can perform nearly 360-degree circumferential spraying on the bumper.

[0067] As a preferred embodiment of the present invention, limit strips 36 are fixedly installed on both sides of the cover film 35, and evenly distributed limit buckles 37 are fixedly installed on the combined plate 3. The limit buckles 37 are all C-shaped structures, and the limit strips 36 extend to the inside of the limit buckles 37.

[0068] Since only the ends of the cover film 35 are fixedly connected to the semicircular plate 32, the cover film 35 can be supported by the semicircular plate 32 and can be separated from the semicircular plate 32. In order to prevent the middle part of the cover film 35 from being separated from the semicircular plate 32 under the action of external force, limit strips 36 are fixedly connected on both sides of the cover film 35, and uniformly distributed limit buckles 37 are fixedly installed on the combined plate 3. In the initial state, the limit strips 36 extend to the inside of the limit buckles 37, and the limit buckles 37 are used to limit the limit strips 36, and then cooperate with the semicircular plate 32 to enhance the fixing effect on the movement path of the cover film 35.

[0069] As a preferred embodiment of the present invention, a pressing plate is fixedly installed on the same group of combined plates 3 , and the pressing plates are all C-shaped structures. The pressing plates correspond to the scraper plates 22 , and the cover film 35 passes through the gap between the pressing plates and the scraper plates 22 .

[0070] The pressing plate includes a plate body 42 and a roller 43 . The roller 43 is rotatably mounted on the plate body 42 , and the roller 43 is rollingly connected to the cover film 35 .

[0071] Since the cover film 35 is made of a flexible material, in order to further enhance the scraping effect on the inner wall of the cover film 35, a pressure plate is provided in the present invention. The pressure plate and the scraper 22 are correspondingly distributed on both sides of the cover film 35, and the pressure plate is composed of a plate body 42 and a roller 43. The plate body 42 is fixed on the combined plate 3, and the roller 43 rotates on the plate body 42. With the support of the roller 43, the cover film 35 is in close contact with the scraper 22, thereby enhancing the scraping effect of the scraper 22 on the cover film 35. At the same time, when the cover film 35 moves, the roller 43 rotates itself, so that the friction between the cover film 35 and the roller 43 is greatly reduced, thereby reducing the degree of wear on the outer wall of the cover film 35.

[0072] As a preferred embodiment of the present invention, an elastic rope 5 is fixedly mounted on the semicircular plate 32 and the combined plate 3 , and the elastic rope 5 is used to control the initial position of the semicircular plate 32 .

[0073] The elastic rope 5 is installed on the side wall of the semicircular plate 32 and is fixedly connected to the combination plate 3, thereby fixing the initial position of the semicircular plate 32. When the two halves of the cover are combined with each other, the control combination groove 23 is at the top of the cover, which facilitates the spray robot arm 1 to be inserted into the combination groove 23 along a fixed route.

[0074] like Fig. 9 As shown, a car bumper spraying process comprises the following steps:

[0075] S1, positioning: the conveyor 12 pushes the bracket 11 along the preset transportation route to transport the bumper to the spraying station, and then the electric push rod 27 pushes the moving seat 25 to move toward each other;

[0076] S2, isolation: when the two moving seats 25 move toward each other, they push the deposition box 21 and the cover shell, which are divided into two halves, to gradually close together, thereby covering the bumper;

[0077] S3, spraying: under the control of a preset program, the spraying robot arm 1 is first inserted into the inner cavity of the housing through the combination slot 23, and then moves to spray the bumper;

[0078] S4, recovery: After spraying is completed, the external negative pressure recovery device extracts negative pressure from the deposition box 21 and the inner cavity of the cover shell through the pipeline, and then the movable seat 25 moves backward, and the conveyor 12 pushes the bracket 11 to move to the next process.

[0079] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vehicle bumper spraying device, comprising a spraying robot arm (1), a bracket (11) and a conveyor (12); The bracket (11) is installed on the conveyor (12), and the bracket (11) is used to fix and support the bumper and cooperate with the conveyor (12) to transport the bumper. The spraying mechanical arm (1) is installed on both sides of the conveyor (12), and the spraying mechanical arm (1) is used to automatically spray the bumper; Features: It also includes a paint mist collection mechanism, which is used to recover excess paint mist, and the paint mist collection mechanism is located on the movement path of the conveyor (12); The paint mist collecting mechanism comprises a deposition box (21), a cover shell and a scraper (22); The deposition box (21) is installed under the bumper, the deposition box (21) is used to receive paint mist, the top of the deposition box (21) is designed to be open, and the deposition box (21) is externally connected to a negative pressure recovery device through a pipeline; The cover shell is installed at the opening of the deposition box (21), the cover shell is rotatably connected to the deposition box (21), and the cover shell and the deposition box (21) are sleeved outside the bumper; Scrapers (22) are fixedly mounted on both sides of the deposition box (21), the scrapers (22) are in contact with the inner wall of the housing, and the scrapers (22) are used to scrape the housing; A combination groove (23) is provided at the top of the cover shell. In an initial state, the end of the spraying robot arm (1) is inserted into the inner cavity of the cover shell through the combination groove (23). A symmetrically designed sealing sheet (24) is fixedly installed in the combination groove (23). The sealing sheet (24) is used to seal the combination groove (23).

2. The automobile bumper spraying equipment according to claim 1, characterized in that: Evenly distributed magnetic sheets are fixedly mounted on one side of the two sealing sheets (24) close to each other, and the magnetic sheets of the two sealing sheets (24) attract each other.

3. The automobile bumper spraying equipment according to claim 2, characterized in that: The cover shell and the deposition box (21) are divided into two halves along the movement path of the conveyor (12); a movable seat (25) is fixedly installed on both sides of the deposition box (21); a fixed seat (26) is installed on both sides of the movement path of the conveyor (12); an electric push rod (27) is installed on the fixed seat (26); and the movable seat (25) is slidably installed on the fixed seat (26) via the electric push rod (27).

4. The automobile bumper spraying equipment according to claim 3, characterized in that: The cover shell comprises a combined plate (3), a semicircular plate (32), a cover film (35) and a winding shaft (34); The combined plate (3) is fixedly mounted at both ends of the deposition box (21); an annular groove (31) is formed on the combined plate (3); the semicircular plates (32) are slidably mounted in the annular groove (31); the combined plate (3) and the semicircular plates (32) are divided into two groups, which correspond to the two halves of the deposition box (21) respectively; The combined plates (3) are all provided with winding grooves (33), and winding shafts (34) are rotatably mounted in the winding grooves (33) on the same group of combined plates (3); The cover film (35) is a flexible wear-resistant plastic film, and is wound and installed on a winding shaft (34). The end of the cover film (35) away from the winding shaft (34) is fixedly connected to the top of the semicircular plate (32).

5. The automobile bumper spraying equipment according to claim 4, characterized in that: Limiting strips (36) are fixedly mounted on both sides of the cover film (35), and evenly distributed limiting buckles (37) are fixedly mounted on the combined plate (3), and the limiting buckles (37) are all C-shaped structures, and the limiting strips (36) extend into the interior of the limiting buckles (37).

6. The automobile bumper spraying equipment according to claim 5, characterized in that: A transmission wheel (4) is rotatably mounted at the bottom end of the combined plate (3); the semicircular plate (32) is designed in a toothed ring shape; the transmission wheel (4) is meshingly connected with the semicircular plate (32); and the transmission wheel (4) is connected with the winding shaft (34) via a transmission belt (41).

7. The automobile bumper spraying equipment according to claim 6, characterized in that: A pressing plate is fixedly mounted on the same group of combined plates (3), and the pressing plates are all C-shaped structures. The pressing plates correspond to the scraper plates (22), and the cover film (35) passes through the gap between the pressing plates and the scraper plates (22).

8. The automobile bumper spraying equipment according to claim 7, characterized in that: The pressure plate comprises a plate body (42) and a roller (43); the roller (43) is rotatably mounted on the plate body (42); and the roller (43) is rollingly connected to the cover film (35).

9. The automobile bumper spraying equipment according to claim 8, characterized in that: An elastic rope (5) is fixedly mounted on the semicircular plate (32) and the combined plate (3), and the elastic rope (5) is used to control the initial position of the semicircular plate (32).

10. A spraying process for automobile bumper, characterized in that: The process is applicable to the automobile bumper spraying equipment described in claim 9, and the process comprises the following steps: S1, positioning: the conveyor (12) pushes the bracket (11) along a pre-set transport route to transport the bumper to the spraying station, and then the electric push rod (27) pushes the moving seat (25) to move toward each other; S2, isolation: when the two moving seats (25) move toward each other, they push the deposition box (21) and the cover shell, which are divided into two halves, to gradually close together, thereby covering the bumper; S3, spraying: under the control of a preset program, the spraying robot arm (1) is first inserted into the inner cavity of the housing through the combination slot (23), and then moves to spray the bumper; S4, recovery: After the spraying is completed, the external negative pressure recovery device extracts negative pressure from the deposition box (21) and the inner cavity of the cover shell through the pipeline, and then the movable seat (25) moves backward, and the conveyor (12) pushes the bracket (11) to move to the next process.

Images