A sand blasting device for processing an aluminum alloy workpiece and a method thereof

Abstract

The application discloses a sand blasting device for aluminum alloy workpiece machining and a method thereof, and particularly relates to the field of sand blasting. The sand blasting device comprises a machine box, a support positioning assembly is arranged in the machine box, the support positioning assembly comprises a support, a plurality of sets of conveying components are arranged in the circumferential direction above the support, and the conveying components are used for conveying the arc-shaped aluminum alloy pipe along the circumferential direction; one side of the support is provided with a sand blasting station, a sand blasting assembly is arranged at the position of the sand blasting station, the sand blasting assembly is provided with a plurality of sets of sand blasting guns, the plurality of sets of sand blasting guns are arranged in the circumferential direction, and when the conveying components convey the arc-shaped aluminum alloy pipe, the arc-shaped aluminum alloy pipe passes through the middle of the plurality of sets of sand blasting guns. The application conveys the arc-shaped aluminum alloy pipe by using the plurality of sets of conveying components arranged in the circumferential direction, so that the conveying path of the conveying components is circular, and therefore the sand blasting guns arranged in the circumferential direction of the cross-section circle of the arc-shaped aluminum alloy pipe can perform sand blasting operation on the surface of the arc-shaped aluminum alloy pipe in the conveying process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sand blasting, in particular to a sand blasting device for aluminum alloy workpiece machining and a method thereof. BACKGROUND

[0002] Before being sprayed or plated with a protective layer, aluminum alloy workpieces need to be pretreated, that is, surface cleaning. There are many methods for surface cleaning, such as using manual tools or pickling, etc. Among them, the sand blasting method is the most thorough and universal way. Sand blasting uses compressed air as power to form a high-speed jet beam, and high-speed abrasive is sprayed onto the surface of the workpiece. Due to the impact and cutting action of the abrasive on the surface of the workpiece, the surface of the workpiece obtains a certain cleanliness and different roughness, thereby improving the adhesion, moisture resistance and corrosion resistance of the coating.

[0003] Aluminum alloy pipes are widely used in the fields of transportation tools (such as cars and bicycles), fitness equipment, and construction. Currently, for straight aluminum alloy pipes, the straight aluminum alloy pipes are supported in a roller support device, and the roller support device drives the straight aluminum alloy pipes to rotate, so that the outer surface of the straight aluminum alloy pipes can be fully sand blasted. However, for arc-shaped aluminum alloy pipes, the roller support device cannot drive them to rotate, and thus various clamps need to be set up to clamp and sand blast several times, which is inconvenient to operate. SUMMARY

[0004] The present application provides a sand blasting device for aluminum alloy workpiece machining and a method thereof, which solves the problem that the roller support device cannot drive the arc-shaped aluminum alloy pipe to rotate, and thus various clamps need to be set up to clamp and sand blast several times, which is inconvenient to operate.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a sand blasting device for aluminum alloy workpiece machining, comprising a machine case, a support positioning assembly is installed inside the machine case, the support positioning assembly comprises a support base, a plurality of sets of conveying components are arranged in the circumferential direction above the support base, the conveying components are used to convey the arc-shaped aluminum alloy pipe along the circumferential direction; one side of the support base has a sand blasting station, a sand blasting assembly is arranged at the position of the sand blasting station, the sand blasting assembly has a plurality of sets of sand blasting guns, the plurality of sets of sand blasting guns are arranged in the circumferential direction, and when the conveying components convey the arc-shaped aluminum alloy pipe, the arc-shaped aluminum alloy pipe passes through the middle of the plurality of sets of sand blasting guns.

[0006] In a preferred embodiment, the conveying component comprises a fixed seat, the fixed seat is fixedly installed at the upper end of the support base, a conveying wheel is rotationally connected to one side of the fixed seat close to the middle of the support base and one side of the fixed seat away from the middle of the support base, the conveying wheel is conical, and the arc-shaped aluminum alloy pipe is conveyed between the two conveying wheels.

[0007] In a preferred implementation form, the supporting and positioning assembly further comprises a transmission component, the transmission component comprises a driving gear rotatably connected to the middle part of the upper end of the support, the bottom of the support is provided with a motor, the output end of the motor is fixedly connected to the middle part of the driving gear, the bottom end of each pair of transmission wheels of the transmission component is fixedly provided with a driven gear, the two driven gears are meshed with each other, and the driving gear is meshed with the driven gear close to one side of the middle part of the support.

[0008] In a preferred implementation form, the sand blasting assembly further comprises a fixing frame fixedly connected to the cabinet, and a pin shaft two fixedly arranged on one side of the sand blasting gun and rotatably connected to one side of the fixing frame.

[0009] In a preferred implementation form, one side of the fixing frame is provided with a movable frame, the movable frame is provided with a sliding groove corresponding to the sand blasting gun, one side of the sand blasting gun is fixedly connected with a pin shaft three, the pin shaft three slides in the sliding groove, and one side of the fixing frame is provided with a cylinder one, the fixed end and the output end of the cylinder one are hingedly connected with the fixing frame and the movable frame respectively.

[0010] In a preferred implementation form, one side of the movable frame is provided with an arc-shaped groove coaxial with the movable frame, and at least three pin shafts one are fixedly arranged on one side of the fixing frame and slide in the arc-shaped groove.

[0011] In a preferred implementation form, one side of the support is provided with a blanking station, the blanking station is provided with a limiting assembly above a group of transmission components close to one end of the sand blasting station, the limiting assembly comprises a cylinder two, the fixed end of the cylinder two is fixedly connected to the cabinet, the output end of the cylinder two is fixedly provided with a fixed cylinder, the bottom of the fixed cylinder is movably connected with a movable rod, the inside of the fixed cylinder is provided with a spring, the spring is used for resetting the movable rod downward, the bottom of the movable rod is provided with a ball, and the ball is used for pressing on the outer wall of the arc-shaped aluminum alloy pipe.

[0012] In a preferred implementation form, one side of the support is provided with a conveying belt one, and the conveying belt one is located on one side of the blanking station, and the conveying belt one is fixedly provided with a baffle one on both sides, and the baffle one close to the limiting assembly is provided with a avoiding opening.

[0013] In a preferred implementation form, one side of the support is provided with a blanking station, one side of the blanking station is provided with a conveying belt two, the conveying belt two is fixedly provided with a flat plate on one end close to the blanking station, the front end of the flat plate is fixedly provided with a baffle two, one end of the flat plate close to the baffle two is provided with a blanking opening, and the blanking opening is located directly above the blanking station.

[0014] The application also provides a sand blasting method of the sand blasting device for aluminum alloy workpiece machining.

[0015] Step one: placing the arc-shaped aluminum alloy pipe on the plurality of groups of transmission components;

[0016] Step two: conveying the arc-shaped aluminum alloy pipe along the circumferential direction of the support positioning assembly through the conveying component;

[0017] Step three: when the arc-shaped aluminum alloy pipe is conveyed to the position of the sand blasting station, the outer surface of the arc-shaped aluminum alloy pipe is sand blasted through the sand blasting gun, and the conveying component simultaneously conveys the arc-shaped aluminum alloy pipe forward;

[0018] Step four: when the outer surface of the arc-shaped aluminum alloy pipe is completely sand blasted, the arc-shaped aluminum alloy pipe is conveyed to the position of the discharging station by the conveying component, the front end of the arc-shaped aluminum alloy pipe is rotated downward under the action of gravity, and finally falls down.

[0019] The technical effects and advantages of the present application are as follows:

[0020] 1. The present application uses several groups of conveying components arranged in the circumferential direction to convey the arc-shaped aluminum alloy pipe, so that the conveying path of the conveying component is circular, so that the sand blasting gun arranged in the circumferential direction of the cross-sectional circle of the arc-shaped aluminum alloy pipe can perform sand blasting operation on the surface of the arc-shaped aluminum alloy pipe during conveying. Compared with the prior art, no clamp needs to be set, manual replacement of the clamping direction is not needed during sand blasting, and the arc-shaped aluminum alloy pipe can be conveyed forward while being sand blasted, thereby improving the sand blasting efficiency.

[0021] 2. The present application sets a limiting assembly, when the arc-shaped aluminum alloy pipe is conveyed to the position of the sand blasting station, the front end of the arc-shaped aluminum alloy pipe is rotated downward due to gravity, and then discharged. This mode can shorten the space occupied by the discharging station. Compared with the normal discharging mode, longer arc-shaped aluminum alloy pipes can be accommodated on the support positioning assembly, that is, longer arc-shaped aluminum alloy pipes can be sand blasted, thereby expanding the application range of the device. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a schematic diagram of the local structure of the present application Figure One ;

[0024] Figure 3 is a schematic diagram of the local structure of the present application Figure Two ;

[0025] Figure 4 is a schematic diagram of the local structure of the present application Figure Three ;

[0026] Figure 5 is a schematic diagram of the structure of the support positioning assembly of the present application;

[0027] Figure 6 is a schematic diagram of the structure of the sand blasting assembly of the present application;

[0028] Figure 7 Fig. 1 is a schematic view of the arc-shaped aluminum alloy pipe of the present application when being rotated downwardly;

[0029] Figure 8 Fig. 1 is a schematic view of the arc-shaped aluminum alloy pipe of the present application when being rotated downwardly;

[0030] The figure marks are as follows: 1, a machine box; 2, a supporting and positioning assembly; 20, a support; 201, a feeding station; 202, a sand blasting station; 203, a discharging station; 21, a conveying component; 211, a conveying wheel; 212, a fixing seat; 23, a transmission component; 231, a driving gear; 232, a motor; 233, a driven gear; 3, a sand blasting assembly; 31, a fixing frame; 311, a pin shaft one; 32, a sand blasting gun; 321, a pin shaft two; 322, a pin shaft three; 33, a movable frame; 331, a sliding groove; 332, an arc-shaped groove; 34, a cylinder one; 4, a limiting assembly; 41, a cylinder two; 42, a fixing cylinder; 43, a movable rod; 44, a ball; 5, a conveying belt one; 51, a baffle one; 52, an avoiding opening; 6, a conveying belt two; 61, a flat plate; 62, a baffle two; 63, a discharging opening; 7, an arc-shaped aluminum alloy pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0032] Referring to the drawings in the description Figures 1-8 A sand blasting device for aluminum alloy workpiece machining comprises a machine box 1, and a supporting and positioning assembly 2 is installed inside the machine box 1. The supporting and positioning assembly 2 comprises a support 20, and a plurality of sets of conveying components 21 are arranged in the circumferential direction above the support 20. The conveying components 21 are used to convey an arc-shaped aluminum alloy pipe 7 along the circumferential direction.

[0033] As shown in the figures, Figure 5 and Figure 7 The conveying component 21 comprises a fixing seat 212, which is fixedly installed at the upper end of the support 20. The fixing seat 212 is rotatably connected with a conveying wheel 211 on the side close to the middle part of the support 20 and on the side away from the middle part of the support 20. The conveying wheel 211 is conical, and the arc-shaped aluminum alloy pipe 7 is conveyed between the two conveying wheels 211.

[0034] It should be noted that the upper end of the conveying wheel 211 is a pointed end, so that the two conveying wheels 211 can support the arc-shaped aluminum alloy pipe 7, and when the two conveying wheels 211 rotate, the arc-shaped aluminum alloy pipe 7 can also be conveyed forwardly, and the conveying path is a circle.

[0035] In the above technical solution, the transmission wheel 211 is driven to rotate by the transmission component 23, specifically, as shown in the example below. Figure 5 As shown, the support positioning assembly 2 also includes a transmission component 23. The transmission component 23 includes a drive gear 231 rotatably connected to the middle of the upper end of the support 20. A motor 232 is installed at the bottom of the support 20. The output end of the motor 232 is fixedly installed with the middle of the drive gear 231. The bottom ends of the two transmission wheels 211 of each set of transmission components 21 are fixedly installed with driven gears 233. The two driven gears 233 mesh with each other. The drive gear 231 meshes with the driven gear 233 on the side near the middle of the support 20.

[0036] It should be noted that the motor 232 is a geared motor. The motor 232 drives the drive gear 231 to rotate, the drive gear 231 drives one of the driven gears 233 to rotate, and the driven gear 233 drives another driven gear 233 to rotate, thereby achieving the purpose of driving the two conveyor wheels 211 to rotate in opposite directions, so as to facilitate the forward conveying of the arc-shaped aluminum alloy tube 7.

[0037] In this embodiment, the support 20 has a sandblasting station 202 on one side, and a sandblasting assembly 3 is provided at the position of the sandblasting station 202. The sandblasting assembly 3 has multiple sandblasting guns 32, which are arranged in a circumferential direction. When the conveying component 21 conveys the arc-shaped aluminum alloy tube 7, the arc-shaped aluminum alloy tube 7 passes through the middle of the multiple sandblasting guns 32.

[0038] It should be noted that by setting multiple sets of sandblasting guns 32, sandblasting can be performed in the circumferential direction of the cross-sectional circle of the arc-shaped aluminum alloy tube 7. Thus, during sandblasting, the arc-shaped aluminum alloy tube 7 can be processed while moving forward, without needing to stop.

[0039] In this embodiment, the implementation method is as follows: First, the arc-shaped aluminum alloy tube 7 is placed on multiple sets of conveying components 21, supported by two conveying wheels 211. Then, the motor 232 drives the drive gear 231 to rotate, which in turn drives two driven gears 233 mounted on each set of conveying wheels 211 to rotate, thereby causing the two conveying wheels 211 to rotate in opposite directions. The conveying wheels 211, through friction, transport the arc-shaped aluminum alloy tube 7 forward along a circular path. When the arc-shaped aluminum alloy tube 7 is transported to the sandblasting station 202, the sandblasting gun 32 sandblasts the surface of the arc-shaped aluminum alloy tube 7, such as... Figure 6As shown, three sandblasting guns 32 are provided. These three sandblasting guns 32 can perform sandblasting in the circumferential direction of the cross-sectional circle of the arc-shaped aluminum alloy tube 7. During the sandblasting process, the conveying component 21 can continue to transport the tube forward, that is, the arc-shaped aluminum alloy tube 7 is sandblasted while being transported forward. After one arc-shaped aluminum alloy tube 7 has been sandblasted, it can be removed, thus completing the sandblasting process.

[0040] The above technical solution uses several sets of conveying components 21 arranged in a circumferential direction to transport the arc-shaped aluminum alloy tube 7, making the conveying path of the conveying components 21 circular. Thus, during the transport process, the sandblasting gun 32 arranged in the circumferential direction of the cross-section circle of the arc-shaped aluminum alloy tube 7 can perform sandblasting operation on the surface of the arc-shaped aluminum alloy tube 7. Compared with the prior art, it is not necessary to set up clamps, and there is no need to manually change the clamping direction during the sandblasting process. Moreover, it can sandblast while conveying forward, which improves the sandblasting efficiency.

[0041] Refer to the instruction manual appendix Figures 2-4 , Figure 6 The sandblasting assembly 3 also includes a fixing frame 31, which is fixedly installed with the housing 1. A second pin 321 is fixed on one side of the sandblasting gun 32, and the second pin 321 is rotatably connected to one side of the fixing frame 31.

[0042] Furthermore, a movable frame 33 is provided on one side of the fixed frame 31. The movable frame 33 has a sliding groove 331 that corresponds to the sandblasting gun 32. A pin 322 is fixedly connected to one side of the sandblasting gun 32. The pin 322 slides in the sliding groove 331. A cylinder 34 is provided on one side of the fixed frame 31. The fixed end and the output end of the cylinder 34 are hinged to the fixed frame 31 and the movable frame 33, respectively.

[0043] Furthermore, an arc-shaped groove 332 is provided on one side of the movable frame 33. The arc-shaped groove 332 is coaxial with the movable frame 33. At least three pins 311 are fixedly installed on one side of the fixed frame 31. The pins 311 slide inside the arc-shaped groove 332.

[0044] It should be noted that, as Figure 6 As shown, there are three pins 311, and the centers of the ends of the three pins 311 are not on the same straight line, so that the movable frame 33 can only rotate around its own axis.

[0045] In this embodiment, when sandblasting the outer surface of the arc-shaped aluminum alloy tube 7, the cylinder 34 extends and retracts to drive the movable frame 33 to rotate forward and backward. When the movable frame 33 rotates, the arc-shaped groove 332 can be pushed to slide inside the groove 331 through the slide groove 331, thereby causing the sandblasting gun 32 to swing back and forth around the axis of the pin 321. The continuous swinging of the sandblasting gun 32 can increase the spraying range of the sandblasting gun 32.

[0046] With reference to the description accompanying drawings Figures 1-7 One side of the support 20 has a blanking station 203, the blanking station 203 is provided with a limiting assembly 4 above a group of conveying components 21 near one end of the sand blasting station 202, the limiting assembly 4 comprises a second air cylinder 41, the fixed end of the second air cylinder 41 is fixedly installed with the machine box 1, the output end of the second air cylinder 41 is fixedly installed with a fixed cylinder 42, the bottom of the fixed cylinder 42 is movably inserted with a movable rod 43, the inside of the fixed cylinder 42 is provided with a spring, the spring is used for resetting the movable rod 43 downward, the bottom of the movable rod 43 is provided with a ball 44, the ball 44 is used for pressing on the outer wall of the arc-shaped aluminum alloy pipe 7.

[0047] It should be noted that after the arc-shaped aluminum alloy pipe 7 is finished spraying, it is transported by the conveying component 21 to the direction of the sand blasting station 202, when the front end of the arc-shaped aluminum alloy pipe 7 is transported to the position of the group of conveying components 21 closest to the end of the sand blasting station 202, the upper surface of the arc-shaped aluminum alloy pipe 7 is pressed by the ball 44, and then the arc-shaped aluminum alloy pipe 7 continues to be transported forward, when the arc-shaped aluminum alloy pipe 7 is only transported by the group of conveying components 21 closest to the end of the sand blasting station 202, and when the front end of the arc-shaped aluminum alloy pipe 7 extends for a distance, under the action of gravity, the front end of the arc-shaped aluminum alloy pipe 7 rotates downward, at this time, the state is as shown in Figures 2-4 and Figure 6 When the conveying component 21 continues to transport the arc-shaped aluminum alloy pipe 7, the arc-shaped aluminum alloy pipe 7 finally falls down.

[0048] Further, as shown in Figure 7 One side of the support 20 is provided with a conveying belt one 5, and the conveying belt one 5 is located on one side of the blanking station 203, the conveying belt one 5 is fixedly installed with a baffle one 51 on both sides, and the baffle one 51 near the limiting assembly 4 is provided with an avoiding opening 52.

[0049] It should be noted that when the front end of the arc-shaped aluminum alloy pipe 7 rotates downward and falls at the position of the sand blasting station 202, the end of the arc-shaped aluminum alloy pipe 7 will enter between the two baffle ones 51 from the position of the avoiding opening 52, after the arc-shaped aluminum alloy pipe 7 completely falls between the two baffle ones 51, the arc-shaped aluminum alloy pipe 7 is transported away. Among them, the height of the baffle one 51 can be set according to the need, so as to ensure that the arc-shaped aluminum alloy pipe 7 will not fall outside, in addition, after the front end of the arc-shaped aluminum alloy pipe 7 contacts with the conveying belt one 5, the conveying belt one 5 can be transported backward for a distance, so as to facilitate that the front end of the arc-shaped aluminum alloy pipe 7 can fall on the conveying belt one 5, and then transported forward, the arc-shaped aluminum alloy pipe 7 is sent out.

[0050] Further, as shown in Figure 2 and Figure 3As shown, one side of the support 20 has a feeding station 201, one side of the feeding station 201 is provided with a conveying belt two 6, the conveying belt two 6 is fixedly installed with a flat plate 61 at one end close to the feeding station 201, the front end of the flat plate 61 is fixedly installed with a baffle two 62, the end of the flat plate 61 close to the baffle two 62 is provided with a blanking hole 63, and the blanking hole 63 is located directly above the feeding station 201.

[0051] It should be noted that a plurality of untreated arc-shaped aluminum alloy pipes 7 can be placed on the conveying belt two 6, and the arc-shaped aluminum alloy pipes 7 are conveyed forward by the conveying belt two 6. When the arc-shaped aluminum alloy pipes 7 are conveyed to the position of the blanking hole 63, the arc-shaped aluminum alloy pipes 7 fall into a plurality of conveying components 21 located at the feeding station 201 and are conveyed forward. Among them, the flat plate 61 supports the arc-shaped aluminum alloy pipes 7, and the baffle two 62 is used to block the arc-shaped aluminum alloy pipes 7.

[0052] In the above technical solution, in the sand blasting device, it is divided into a feeding station 201, a sand blasting station 202 and a discharging station 203, and when each position can accommodate at least one arc-shaped aluminum alloy pipe 7, that is, at least three arc-shaped aluminum alloy pipes 7 are located on the support positioning assembly 2 at the same time, the sand blasting process can be continuously carried out. Otherwise, for example, only two arc-shaped aluminum alloy pipes 7 can be accommodated, the arc-shaped aluminum alloy pipes 7 must be blanked after discharging, and feeding can be carried out at the feeding station 201, which needs to be stopped. The above technical solution sets the limiting assembly 4, when the arc-shaped aluminum alloy pipes 7 are conveyed to the position of the sand blasting station 202, due to the action of gravity, the front end of the arc-shaped aluminum alloy pipes 7 rotates downward and then blanks, which can shorten the space occupied by the discharging station 203, that is, compared with the normal discharging mode (such as the mode of using a clamp to clamp out the arc-shaped aluminum alloy pipes 7), the support positioning assembly 2 can accommodate longer arc-shaped aluminum alloy pipes 7, that is, it can be used for sand blasting of longer arc-shaped aluminum alloy pipes 7, thereby expanding the application range of the device.

[0053] Referring to the drawings accompanying the specification Figures 1-8 The present application also provides a sand blasting method of the sand blasting device for aluminum alloy workpiece machining, comprising the following steps:

[0054] Step one: placing the arc-shaped aluminum alloy pipes 7 on the plurality of conveying components 21;

[0055] Step two: conveying the arc-shaped aluminum alloy pipes 7 along the circumferential direction of the support positioning assembly 2 through the conveying components 21;

[0056] Step three: when the arc-shaped aluminum alloy pipes 7 are conveyed to the position of the sand blasting station 202, the outer surface of the arc-shaped aluminum alloy pipes 7 is sand blasted by the sand blasting gun 32, and the conveying components 21 simultaneously convey the arc-shaped aluminum alloy pipes 7 forward;

[0057] Step four: when the outer surface of the arc-shaped aluminum alloy pipe 7 is completely sandblasted, the arc-shaped aluminum alloy pipe 7 is conveyed to the position of the cutting-off station 203 by the conveying component 21, the front end of the arc-shaped aluminum alloy pipe 7 rotates downward under the action of gravity, and finally falls off.

[0058] Finally: the above only for the preferred embodiments of the present application, and not for limiting the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A sandblasting device for machining aluminum alloy workpieces, characterized in that: Includes a chassis (1), inside which a support and positioning assembly (2) is installed. The support and positioning assembly (2) includes a support (20), and several sets of conveying components (21) are arranged in the circumferential direction above the support (20). The conveying components (21) are used to convey the arc-shaped aluminum alloy tube (7) along the circumferential direction. The support (20) has a sandblasting station (202) on one side. A sandblasting assembly (3) is provided at the position of the sandblasting station (202). The sandblasting assembly (3) has multiple sandblasting guns (32). The multiple sandblasting guns (32) are arranged in a circumferential direction. When the conveying component (21) conveys the arc-shaped aluminum alloy tube (7), the arc-shaped aluminum alloy tube (7) passes through the middle of the multiple sandblasting guns (32). The conveying component (21) includes a fixed seat (212), which is fixedly installed on the upper end of the support (20). The fixed seat (212) is rotatably connected to a conveying wheel (211) on both the side of the fixed seat (212) near the middle of the support (20) and the side away from the middle of the support (20). The conveying wheel (211) is conical, and an arc-shaped aluminum alloy tube (7) is conveyed between the two conveying wheels (211). The support positioning assembly (2) also includes a transmission component (23), which includes a drive gear (231) rotatably connected to the middle of the upper end of the support (20). A motor (232) is installed at the bottom of the support (20). The output end of the motor (232) is fixedly installed with the middle of the drive gear (231). The bottom ends of the two transmission wheels (211) of each set of transmission components (21) are fixedly installed with driven gears (233). The two driven gears (233) mesh with each other. The drive gear (231) meshes with the driven gear (233) on the side near the middle of the support (20). The sandblasting assembly (3) also includes a fixing frame (31), which is fixedly installed with the chassis (1). A pin (321) is fixed on one side of the sandblasting gun (32), and the pin (321) is rotatably connected to one side of the fixing frame (31). A movable frame (33) is provided on one side of the fixed frame (31). The movable frame (33) has a sliding groove (331) corresponding to the sandblasting gun (32). A pin (322) is fixedly connected to one side of the sandblasting gun (32). The pin (322) slides in the sliding groove (331). A cylinder (34) is provided on one side of the fixed frame (31). The fixed end and the output end of the cylinder (34) are hinged to the fixed frame (31) and the movable frame (33) respectively.

2. The sandblasting device for processing aluminum alloy workpieces according to claim 1, characterized in that: An arc-shaped groove (332) is provided on one side of the movable frame (33), and the arc-shaped groove (332) is coaxial with the movable frame (33). At least three pins (311) are fixedly installed on one side of the fixed frame (31), and the pins (311) slide inside the arc-shaped groove (332).

3. The sandblasting device for processing aluminum alloy workpieces according to claim 2, characterized in that: The support (20) has a material unloading station (203) on one side. A limit assembly (4) is provided above a set of conveying components (21) near the sandblasting station (202) of the material unloading station (203). The limit assembly (4) includes a second cylinder (41). The fixed end of the second cylinder (41) is fixedly installed with the machine box (1). A fixed cylinder (42) is fixedly installed at the output end of the second cylinder (41). A movable rod (43) is movably inserted into the bottom of the fixed cylinder (42). A spring is provided inside the fixed cylinder (42). The spring is used to reset the movable rod (43) downward. A ball (44) is provided at the bottom of the movable rod (43). The ball (44) is used to press on the outer wall of the arc-shaped aluminum alloy tube (7).

4. The sandblasting device for processing aluminum alloy workpieces according to claim 3, characterized in that: A conveyor belt (5) is provided on one side of the support (20), and the conveyor belt (5) is located on one side of the unloading station (203). Baffles (51) are fixedly installed on both sides of the conveyor belt (5), and the baffle (51) near the limiting component (4) has an avoidance opening (52).

5. The sandblasting device for machining aluminum alloy workpieces according to claim 4, characterized in that: The support (20) has a loading station (201) on one side. A second conveyor belt (6) is provided on one side of the loading station (201). A flat plate (61) is fixedly installed on one end of the second conveyor belt (6) near the loading station (201). A second baffle (62) is fixedly installed on the front end of the flat plate (61). A discharge port (63) is opened on one end of the flat plate (61) near the second baffle (62). The discharge port (63) is located directly above the loading station (201).

6. A method for sandblasting using the sandblasting apparatus for machining aluminum alloy workpieces as described in claim 5, characterized in that, Includes the following steps: Step 1: Place the arc-shaped aluminum alloy tube (7) on the multiple sets of conveying components (21); Step 2: The arc-shaped aluminum alloy tube (7) is conveyed along the circumferential direction of the support and positioning assembly (2) by the conveying component (21); Step 3: When the arc-shaped aluminum alloy tube (7) is transported to the position of the sandblasting station (202), the outer surface of the arc-shaped aluminum alloy tube (7) is sandblasted by the sandblasting gun (32), and at the same time the conveying component (21) transports the arc-shaped aluminum alloy tube (7) forward. Step 4: After the outer surface of the arc-shaped aluminum alloy tube (7) is completely sandblasted, the arc-shaped aluminum alloy tube (7) is transported by the conveying component (21) to the unloading station (203). The front end of the arc-shaped aluminum alloy tube (7) rotates downward under the action of gravity and finally falls down.

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