Shell casting surface automatic sand blasting device and sand blasting method

Abstract

The embodiment of the invention provides an automatic sand blasting device and method for the surface of a shell casting. The automatic sand blasting device comprises a displacement assembly, a feeding and discharging assembly and an outer surface sand blasting robot. Wherein the displacement assembly is provided with a plurality of stations, the multiple stations are evenly distributed in the circumferential direction of the displacement assembly, and the stations are used for containing shell castings. A plurality of shell castings can be placed in the circumferential direction of the displacement assembly at the same time. The feeding and discharging assembly is arranged on one side of the displacement assembly and used for taking and placing the shell castings from the displacement assembly. The outer surface sand blasting robot is used for carrying out sand blasting treatment on the shell castings, the outer surface sand blasting robot is arranged on one side of the displacement assembly, the multiple stations sequentially pass through the surface sand blasting robot, and the surface sand blasting robot can continuously carry out outer surface sand blasting treatment on the shell castings on the multiple stations; and the surface sand blasting efficiency of the shell casting is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of casting processing, and in particular to an automatic sandblasting device and a sandblasting method for the surface of a shell casting. Background Art

[0002] In recent years, with the continuous improvement of the technical and combat level of weapon systems, the demand for weight reduction has become increasingly urgent. Most of the cabin products currently produced are cylindrical thin-walled shell castings. With the expansion of the application scope of cylindrical thin-walled shell castings in aerospace product structural parts, the output of shell castings will continue to increase year by year.

[0003] In order to ensure that the internal quality of the product meets the requirements of Class I castings, almost all shell castings are formed by resin sand or clay sand molding and low differential pressure counter-gravity casting process. The inner and outer surfaces of the shell castings are seriously sticky with sand. Therefore, after the shell castings are cast, they need to be sandblasted on the surface.

[0004] At present, the sandblasting process on the surface of shell castings is carried out by manual sand blowing. The sandblasting cleaning workload is extremely large, the labor intensity is high, and it requires huge manpower. At the same time, it is inefficient and affects the production rhythm. Summary of the invention

[0005] The embodiments of the present application provide an automatic sandblasting device and a sandblasting method for the surface of a shell casting, so as to solve the problem of low sandblasting efficiency of shell castings in the prior art.

[0006] In a first aspect, an embodiment of the present application provides an automatic sandblasting device for a shell casting surface, comprising:

[0007] A displacement assembly is provided with a plurality of workstations, the plurality of workstations are evenly distributed along the circumference of the displacement assembly, and the workstations are used to place the shell casting;

[0008] A loading and unloading assembly is arranged on one side of the displacement assembly, and the loading and unloading assembly is used to take and place the shell casting from the displacement assembly;

[0009] The outer surface sandblasting robot is used to perform sandblasting on the shell casting. The outer surface sandblasting robot is arranged on one side of the displacement assembly. The plurality of workstations pass through the surface sandblasting robot in sequence to perform outer surface sandblasting on the shell casting on the workstations.

[0010] In a feasible implementation, the displacement assembly includes a plurality of turntables, a bracket, a first drive motor and a plurality of second drive motors, the bracket is provided with a rotating table, the rotating table is connected to the first drive motor, and the drive motor drives the rotating table to rotate;

[0011] The plurality of turntables are evenly distributed along the circumference of the rotating table, and the turntables are configured as workstations;

[0012] A plurality of the second driving motors are all disposed on the rotating table, each of the rotating tables is connected to a corresponding second driving motor, and the second driving motor drives the rotating table to rotate.

[0013] In a feasible implementation, the displacement assembly further includes a spacer plate, a spacer plate is disposed between two adjacent turntables, and the spacer plate is connected to the turntable.

[0014] In a feasible implementation, the loading and unloading assembly includes a frame, a guide assembly, a transmission assembly, a third drive motor and a grabbing assembly. The frame is arranged on one side of the displacement assembly. The guide assembly and the transmission assembly are both connected to the frame. The grabbing assembly is connected to the guide assembly and the transmission assembly. The transmission assembly is connected to the third drive motor. The third drive motor drives the grabbing assembly to move in a direction close to or away from the displacement assembly through the transmission assembly.

[0015] In a possible implementation, the grabbing assembly is configured as a robotic arm 330 grabbing assembly.

[0016] In a possible implementation, the transmission assembly is configured as a belt transmission assembly.

[0017] In a feasible implementation, the guide assembly is configured as a linear guide assembly;

[0018] And / or, the third drive motor is configured as a servo motor.

[0019] In a feasible implementation, the automatic sandblasting device for the surface of the shell casting also includes an inner surface sandblasting robot, and the inner surface sandblasting robot is arranged on one side of the outer surface sandblasting robot. The outer surface sandblasting robot and the inner surface sandblasting robot simultaneously sandblast the shell castings at different workstations.

[0020] In a feasible implementation, the external surface sandblasting robot includes a base, a spray gun, a sand tank and a mechanical arm, the mechanical arm is arranged on the base, the sand gun is arranged on the mechanical arm, the spray gun is connected to the sand tank through a pipeline, and the sand tank contains sandblasting raw materials.

[0021] In a second aspect, an embodiment of the present application provides a method for sandblasting the surface of a shell casting, using the automatic sandblasting device for the surface of a shell casting described in the first aspect to process the surface of the shell casting.

[0022] In the first aspect, the embodiment of the present application provides an automatic sandblasting device for the surface of a shell casting, including a displacement component, a loading and unloading component, and an outer surface sandblasting robot. Among them, the displacement component is provided with a plurality of workstations, and the plurality of workstations are evenly distributed along the circumference of the displacement component, and the workstations are used to place the shell casting. Multiple shell castings can be placed simultaneously in the circumference of the displacement component. The loading and unloading component is arranged on one side of the displacement component, and the loading and unloading component is used to take and place the shell casting from the displacement component; the outer surface sandblasting robot is used to sandblast the shell casting, and the outer surface sandblasting robot is arranged on one side of the displacement component, and a plurality of workstations pass through the surface sandblasting robot in turn, and the surface sandblasting robot can continuously perform outer surface sandblasting on the shell castings on a plurality of workstations, which greatly improves the surface sandblasting efficiency of the shell casting.

[0023] In the second aspect, the embodiment of the present application provides a shell casting surface sandblasting method, using the shell casting surface automatic sandblasting device described in the first aspect to process the surface of the shell casting. Therefore, all the beneficial effects of the technical solution of the shell casting surface automatic sandblasting device described in the first aspect are achieved, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute improper limitations on the present invention.

[0025] In the attached picture:

[0026] Figure 1 It is a schematic structural diagram of an automatic sandblasting device for the surface of a shell casting provided in one embodiment of the present application.

[0027] 100-displacement assembly; 200-loading and unloading assembly; 300-external surface sandblasting robot; 400-internal surface sandblasting robot; 500-shell casting;

[0028] 110 - turntable; 120 - bracket; 130 - partition plate; 310 - base; 320 - sand pot; 330 - mechanical arm. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0030] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] In recent years, with the continuous improvement of the technical and combat level of weapon systems, the demand for weight reduction has become increasingly urgent. Most of the cabin products currently produced are cylindrical thin-walled shell castings. With the expansion of the application scope of cylindrical thin-walled shell castings in aerospace product structural parts, the output of shell castings will continue to increase year by year.

[0033] In order to ensure that the internal quality of the product meets the requirements of Class I castings, almost all shell castings are formed by resin sand or clay sand molding and low differential pressure counter-gravity casting process. The inner and outer surfaces of the shell castings are seriously sticky with sand. Therefore, after the shell castings are cast, they need to be sandblasted on the surface.

[0034] At present, the surface sandblasting process of shell castings is carried out by manual sandblasting. The sandblasting cleaning workload is extremely large, the labor intensity is high, and it requires huge manpower. At the same time, the efficiency is low, which affects the production rhythm. In addition, the sandblasting process will generate a large amount of dust and noise, which will cause great harm to the health and safety of operators. The sandblasting operation environment is harsh, and operators must wear protective equipment such as sandblasting protective clothing, helmets, breathing filter protection systems and protective masks. The sandblasting process is less comfortable. The sandblasting room is a fully enclosed structure. The dust generated during the operation in the sandblasting room cannot be discharged in time, the visibility is reduced, and the situation in the sandblasting room cannot be seen clearly. Once an accident occurs to the operator, it is not easy to rescue in time.

[0035] In order to solve the above problems, an embodiment of the present application provides an automatic sandblasting device and sandblasting method for the surface of a shell casting, which is used to solve the problem of low sandblasting efficiency of the shell casting 500 in the prior art. The solution provided by the embodiment of the present application will be described in detail below in conjunction with the drawings in the specification.

[0036] Figure 1 It is a schematic structural diagram of an automatic sandblasting device for the surface of a shell casting provided in one embodiment of the present application.

[0037] First, refer to Figure 1 As shown, an embodiment of the present application provides an automatic sandblasting device for the surface of a shell casting, comprising a displacement component 100, a loading and unloading component 200, and an outer surface sandblasting robot 300. Among them, the displacement component 100 is provided with a plurality of workstations, and the plurality of workstations are evenly distributed along the circumference of the displacement component 100, and the workstations are used to place the shell casting 500. A plurality of shell castings 500 can be placed simultaneously in the circumference of the displacement component 100. The loading and unloading component 200 is arranged on one side of the displacement component 100, and the loading and unloading component 200 is used to take and place the shell casting 500 from the displacement component 100. The loading and unloading component 200 automatically takes and places the shell casting 500, which can improve the sandblasting efficiency, reduce the operation intensity, improve the working environment, and avoid the safety risks of manual loading and unloading.

[0038] The outer surface sandblasting robot 300 is used to perform sandblasting on the shell casting 500. The outer surface sandblasting robot 300 is arranged on one side of the displacement assembly 100. Multiple workstations pass through the surface sandblasting robot in sequence. The surface sandblasting robot can continuously perform outer surface sandblasting on the shell casting 500 on multiple workstations, which greatly improves the surface sandblasting efficiency of the shell casting 500.

[0039] Reference Figure 1 As shown, the displacement assembly 100 includes a plurality of turntables 110, a bracket 120, a first drive motor (not shown in the figure) and a plurality of second drive motors (not shown in the figure), the bracket 120 is provided with a turntable 110, the turntable 110 is connected to the first drive motor, and the first drive motor drives the turntable 110 to rotate. The plurality of turntables 110 are evenly distributed along the circumference of the turntable 110, and the turntable 110 is configured as a station for placing the shell casting 500. The plurality of second drive motors are all arranged on the turntable 110, each turntable 110 is connected to the corresponding second drive motor, and the second drive motor drives the turntable 110 to rotate, so that the shell casting 500 can rotate, which is convenient for sandblasting. In other words, the first drive motor drives the turntable 110 to rotate, so that the plurality of shell castings 500 arrive at the outer surface sandblasting robot 300 in sequence. The second drive motor drives the turntable 110 to rotate, so that the surface of the shell casting 500 passes through the outer surface sandblasting robot 300, so as to facilitate the completion of the sandblasting. For example, the first driving motor can rotate at a uniform speed according to a set program, thereby driving the rotating table 110 to rotate at a uniform speed, so that multiple shell castings 500 can pass through at a uniform speed, ensuring that the outer surface of the shell casting 500 is sandblasted uniformly.

[0040] In addition, if Figure 1As shown, the displacement assembly 100 also includes a spacer plate 130, and a spacer plate 130 is arranged between two adjacent turntables 110. The spacer plate 130 is connected to the rotating table 110, and the spacer plate 130 is used to separate adjacent turntables 110 to prevent the shell casting 500 of the adjacent station from being affected during sandblasting.

[0041] Continue to refer to Figure 1 As shown, the loading and unloading assembly 200 includes a frame, a guide assembly, a transmission assembly, a drive motor and a grab assembly (all not shown in the figure), wherein the frame is arranged on one side of the displacement assembly 100, the guide assembly and the transmission assembly are connected to the frame, the grab assembly is connected to the guide assembly and the transmission assembly, the transmission assembly is connected to the drive motor, and the drive motor drives the grab assembly to move in a direction close to or away from the displacement assembly 100 through the transmission assembly, thereby picking up and placing the shell casting 500 from the displacement assembly 100. Specifically, the grab assembly is configured as a manipulator grab assembly; the transmission assembly is configured as a belt transmission assembly. The guide assembly is configured as a linear guide assembly; and the third drive motor is configured as a servo motor.

[0042] In some other examples, the automatic sandblasting device for the surface of the shell casting further includes an inner surface sandblasting robot 400, which is arranged on one side of the outer surface sandblasting robot 300 and is used to perform sandblasting on the inner surface of the shell casting 500. The outer surface sandblasting robot 300 and the inner surface sandblasting robot 400 perform sandblasting on the shell casting 500 at different workstations at the same time.

[0043] like Figure 1 As shown, the outer surface sandblasting robot 300 includes a base 310, a spray gun (not shown in the figure), a sand tank 320 and a mechanical arm 330. The mechanical arm 330 is arranged on the base 310. The sand gun arranged on the mechanical arm 330 is connected to the sand tank 320 through a pipeline. The sand tank 320 stores sandblasting raw materials, such as quartz sand. It can be understood that the sand tank 320 can be automatically added with sand continuously to ensure the sand blasting supply of the sand gun. The spray gun can move up and down at a uniform speed according to the set program, so as to uniformly sandblast the shell casting 500 in the height direction.

[0044] Another exemplary method is that the sandblasting abrasive can be spherical brown corundum with a mesh size of 5 to 70, which is called industrial teeth. It is suitable for grinding metals with high tensile strength. It has the characteristics of high purity, good crystallization, strong fluidity, low linear expansion coefficient, and corrosion resistance. It is an ideal "environmentally friendly" sandblasting material.

[0045] In addition, ideal sandblasting process parameters are designed for the sandblasting process of the shell casting 500, such as the nozzle aperture of the spray gun is φ8mm~φ18mm, the distance between the nozzle and the inner and outer surfaces of the shell casting 500 is 100mm~500mm, the automatic sandblasting air pressure is 0.1MPa~2MPa, the sandblasting angle on the spray gun (the angle between the axis of the abrasive jet and the surface of the shell casting 500) is 30°~80°, etc., to ensure that the quality of the inner and outer surfaces of the shell casting 500 is uniform during the automatic sandblasting process.

[0046] In some examples, the inner surface sandblasting robot 400 is different from the outer surface sandblasting robot 300 only in the mechanical arm 330, and the other components and the connection relationship between the components are the same. The mechanical arm 330 of the inner surface sandblasting robot 400 can be extended into the interior of the shell casting 500, so that the spray gun can perform sandblasting on the inner surface of the shell casting 500.

[0047] In the second aspect, the embodiment of the present application provides a method for sandblasting the surface of a shell casting 500, using the automatic sandblasting device for the surface of a shell casting described in the first aspect to process the surface of the shell casting 500. Therefore, all the beneficial effects of the technical solution of the automatic sandblasting device for the surface of a shell casting described in the first aspect are achieved, which will not be repeated here.

[0048] Exemplarily, the method comprises the following steps:

[0049] Step 1: The loading and unloading assembly 200 clamps the No. 1 shell casting and places it on the No. 1 turntable of the displacement assembly 100;

[0050] Step 2: The displacement component 100 rotates 120° counterclockwise, the loading and unloading component 200 clamps the No. 2 shell casting and places it on the No. 2 turntable of the displacement component 100, and the outer surface sandblasting robot 300 sandblasts the outer surface of the No. 1 shell casting on the No. 1 turntable of the displacement component 100.

[0051] Step three: The displacement component 100 rotates 120° counterclockwise, the loading and unloading component 200 clamps the No. 3 shell casting and places it on the No. 3 turntable of the displacement component 100, the outer surface sandblasting robot 300 sandblasts the outer surface of the No. 2 shell casting on the No. 2 turntable of the displacement component 100, and the No. 2 automatic sandblasting robot sandblasts the inner surface of the No. 1 shell casting on the No. 1 turntable of the displacement component 100.

[0052] Step 4: The displacement component 100 rotates 120° counterclockwise, the loading and unloading component 200 removes the No. 1 shell casting from the No. 1 turntable of the displacement component 100, the loading and unloading component 200 clamps the No. 4 shell casting and places it on the No. 1 turntable of the displacement component 100, the outer surface sandblasting robot 300 sandblasts the outer surface of the No. 3 shell casting on the No. 3 turntable of the displacement component 100, and the No. 2 automatic sandblasting robot sandblasts the inner surface of the No. 2 shell casting on the No. 2 turntable of the displacement component 100.

[0053] Step 5: Repeat this process in a loop.

[0054] In step one, the following steps are included:

[0055] The loading and unloading assembly 200 clamps the No. 1 shell casting and moves horizontally to the displacement assembly 100. The loading and unloading assembly 200 places the clamped No. 1 shell casting on the No. 1 turntable of the displacement assembly 100. Then, the loading and unloading assembly 200 moves to the material picking position of the loading and unloading assembly 200 to prepare to clamp the No. 2 shell casting.

[0056] In step 2, the following steps are included:

[0057] The displacement assembly 100 rotates 120° counterclockwise, the loading and unloading assembly 200 clamps the No. 2 shell casting and moves to the displacement assembly 100 in the horizontal direction. The loading and unloading assembly 200 places the clamped shell casting 500 on the No. 2 turntable of the displacement assembly 100, and the loading and unloading assembly 200 moves to the material picking position of the loading and unloading assembly 200 to prepare to clamp the No. 3 shell casting.

[0058] The outer surface sandblasting robot 300 sandblasts the outer surface of the No. 1 shell casting on the No. 1 turntable of the displacement component 100. The spray gun of the outer surface sandblasting robot 300 moves up and down at a uniform speed according to the set program. At the same time, the No. 1 turntable of the displacement component 100 rotates at a uniform speed according to the set program to ensure that the outer surface of the shell casting 500 is evenly sandblasted during the automatic sandblasting process.

[0059] In step three, the following steps are included:

[0060] The displacement assembly 100 rotates 120° counterclockwise, the loading and unloading assembly 200 clamps the No. 3 shell casting and moves horizontally to the displacement assembly 100 , and the loading and unloading assembly 200 places the clamped No. 3 shell casting on the No. 3 turntable of the displacement assembly 100 .

[0061] The outer surface sandblasting robot 300 sandblasts the outer surface of the No. 2 shell casting on the No. 2 turntable of the displacement component 100. The spray gun of the outer surface sandblasting robot 300 moves up and down at a uniform speed according to the set program. At the same time, the No. 2 turntable of the displacement component 100 rotates at a uniform speed according to the set program to ensure that the outer surface of the shell casting 500 is evenly sandblasted during the automatic sandblasting process.

[0062] The inner surface sandblasting robot 400 sandblasts the inner surface of the No. 1 shell casting on the No. 1 turntable of the displacement component 100. The spray gun of the inner surface sandblasting robot 400 moves up and down at a uniform speed according to the set program. At the same time, the No. 1 turntable of the displacement component 100 rotates at a uniform speed according to the set program to ensure that the inner surface of the shell casting 500 is evenly sandblasted during the automatic sandblasting process.

[0063] In step 4, the following steps are included:

[0064] The displacement component 100 rotates 120° counterclockwise, the loading and unloading component 200 removes the No. 1 shell casting from the No. 1 turntable of the displacement component 100, and moves to the material collection location along its horizontal direction, and puts the No. 1 shell casting back to the material collection location; the loading and unloading component 200 clamps the No. 4 shell casting, and moves to the displacement component 100 along the horizontal direction, and the loading and unloading component 200 puts the clamped No. 4 shell casting on the No. 1 turntable of the displacement component 100.

[0065] The outer surface sandblasting robot 300 sandblasts the outer surface of the No. 3 shell casting on the No. 3 turntable of the displacement component 100. The spray gun of the outer surface sandblasting robot 300 moves up and down at a uniform speed according to the set program. At the same time, the No. 3 turntable of the displacement component 100 rotates at a uniform speed according to the set program to ensure that the outer surface of the shell casting 500 is evenly sandblasted during the automatic sandblasting process.

[0066] The inner surface sandblasting robot 400 sandblasts the inner surface of the No. 2 shell casting on the No. 2 turntable of the displacement component 100. The spray gun of the inner surface sandblasting robot 400 moves up and down at a uniform speed according to the set program. At the same time, the No. 2 turntable of the displacement component 100 rotates at a uniform speed according to the set program to ensure that the inner surface of the shell casting 500 is evenly sandblasted during the automatic sandblasting process.

[0067] The mechanical arm 330 of the external surface sandblasting robot 300 has more than 3 degrees of freedom, a working range of 0m to 1.5m, and a payload of 0Kg to 50Kg.

[0068] The robot arm of the inner surface sandblasting robot 400 has more than 3 degrees of freedom, a working range of 0m to 1.5m, and a payload of 0 robot arm of 330 to 50Kg.

[0069] The abrasive used in the automatic sandblasting system is brown corundum, the particle shape is spherical, and the mesh size is 5 to 70.

[0070] The nozzle apertures on the spray guns of the outer surface sandblasting robot 300 and the inner surface sandblasting robot 400 are φ8 mm to φ18 mm.

[0071] The distance between the nozzles on the spray gun of the outer surface sandblasting robot 300 and the spray gun of the inner surface sandblasting robot 400 and the inner and outer surfaces of the shell casting 500 is 100 mm to 500 mm.

[0072] The air pressure for automatic sandblasting is 0.1MPa~2MPa.

[0073] The blasting angle (the angle between the axis of the abrasive jet and the surface of the shell casting 500) of the blasting gun of the outer surface blasting robot 300 and the blasting gun of the inner surface blasting robot 400 is 30° to 80°. The rotation speed of the No. 1 turntable, the No. 2 turntable 22 and the No. 3 turntable of the displacement assembly 100 is 5 r / min to 15 r / min.

[0074] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0075] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. An automatic sandblasting device for the surface of a shell casting, characterized in that: include: A displacement assembly is provided with a plurality of workstations, the plurality of workstations are evenly distributed along the circumference of the displacement assembly, and the workstations are used to place the shell casting; A loading and unloading assembly is arranged on one side of the displacement assembly, and the loading and unloading assembly is used to take and place the shell casting from the displacement assembly; The outer surface sandblasting robot is used to perform sandblasting on the shell casting. The outer surface sandblasting robot is arranged on one side of the displacement component. The plurality of workstations pass through the surface sandblasting robot in sequence to perform outer surface sandblasting on the shell casting on the workstations.

2. The automatic sandblasting device for shell casting surface according to claim 1 is characterized in that: The displacement assembly includes a plurality of turntables, a bracket, a first drive motor and a plurality of second drive motors, wherein the bracket is provided with a turntable, the turntable is connected to the first drive motor, and the drive motor drives the turntable to rotate; The plurality of turntables are evenly distributed along the circumference of the rotating table, and the turntables are configured as workstations; A plurality of the second driving motors are all disposed on the rotating table, each of the rotating tables is connected to a corresponding second driving motor, and the second driving motor drives the rotating table to rotate.

3. The automatic sandblasting device for shell casting surface according to claim 2 is characterized in that: The displacement assembly further comprises a spacer plate, and a spacer plate is disposed between two adjacent turntables, and the spacer plate is connected to the turntable.

4. The automatic sandblasting device for shell casting surface according to claim 1, characterized in that: The loading and unloading assembly includes a frame, a guide assembly, a transmission assembly, a third drive motor and a grabbing assembly. The frame is arranged on one side of the displacement assembly. The guide assembly and the transmission assembly are both connected to the frame. The grabbing assembly is connected to the guide assembly and the transmission assembly. The transmission assembly is connected to the third drive motor. The third drive motor drives the grabbing assembly to move in a direction close to or away from the displacement assembly through the transmission assembly.

5. The automatic sandblasting device for shell casting surface according to claim 4 is characterized in that: The gripping assembly is configured as a robotic arm 330 gripping assembly.

6. The automatic sandblasting device for shell casting surface according to claim 4, characterized in that: The transmission assembly is configured as a belt transmission assembly.

7. The automatic sandblasting device for shell casting surface according to claim 4, characterized in that: The guide assembly is configured as a linear guide assembly; And / or, the third drive motor is configured as a servo motor.

8. The automatic sandblasting device for shell casting surface according to claim 1, characterized in that: The automatic sandblasting device for the surface of the shell casting also includes an inner surface sandblasting robot, which is arranged on one side of the outer surface sandblasting robot. The outer surface sandblasting robot and the inner surface sandblasting robot simultaneously perform sandblasting on the shell castings at different workstations.

9. The automatic sandblasting device for shell casting surface according to claim 1, characterized in that: The outer surface sandblasting robot comprises a base, a spray gun, a sand pot and a mechanical arm, wherein the mechanical arm is arranged on the base, the spray gun is arranged on the mechanical arm, the sand gun is connected with the sand pot through a pipeline, and the sand pot stores sandblasting raw materials.

10. A method for sandblasting the surface of a shell casting, characterized in that: The surface of the shell casting is treated by using the automatic sandblasting device for the surface of the shell casting as described in any one of claims 1 to 9.

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