A shaft member sand blasting processing device

Abstract

The application relates to a shaft piece sand blasting processing device, and belongs to the technical field of sand blasting devices. The device comprises a rack, the rack is sequentially provided with a feeding mechanism, a conveying mechanism, a sand blasting processing mechanism and a discharging mechanism along the conveying direction of a workpiece; a sand blasting bin is arranged on the rack, the sand blasting processing mechanism is located in the sand blasting bin; the conveying mechanism is used for supporting and conveying shaft pieces, the feeding mechanism is used for conveying the shaft pieces to be processed to the conveying mechanism one by one, and the discharging mechanism is used for discharging the shaft pieces after sand blasting from the conveying mechanism; the feeding mechanism and the discharging mechanism are respectively located at two ends of the conveying mechanism, and the sand blasting processing mechanism is located above the conveying mechanism and at the middle section of the conveying mechanism. The application can realize continuous and uninterrupted sand blasting processing of the shaft pieces by integrating the feeding, conveying, sand blasting and discharging integrated operations, can abandon the traditional manual operation mode, can effectively reduce the labor intensity, and can greatly improve the processing and production efficiency.

Description

Technical Field

[0001] This application relates to the technical field of sandblasting apparatus, and in particular to a sandblasting apparatus for shaft components. Background Technology

[0002] Shaft blanks are the initial material form used to manufacture shaft parts. Common manufacturing methods include forging, casting, rolling, and metallurgical methods. After the shaft blanks are formed, their surfaces usually retain oxide scale, rust, oil, and other impurities. If these are not cleaned, they will directly affect the accuracy of subsequent machining, the quality of heat treatment, and the surface properties of the final parts. Therefore, in the machining process of shaft blanks, surface sandblasting is often arranged before and after rough machining to remove surface deposits and improve the surface condition.

[0003] In some applications, based on product drawings and process requirements, it is not necessary to sandblast the entire outer surface of the shaft blank. Instead, sandblasting may be applied only to localized areas such as the shaft shoulder, a specific shaft section, the area around the keyway, or specific mating parts. For example, some shafts only require surface roughening at the bearing mounting area or the welding preheating zone, while sandblasting is not required for non-mating outer circles or non-functional surfaces. This type of localized sandblasting requirement is particularly common in the production of customized shaft parts such as engineering machinery, wind power equipment, and large drive shafts.

[0004] In related technologies, for localized sandblasting needs, manual operation is often carried out by holding a spray gun to the designated area, or by using simple tooling to fix the shaft and then manually spraying the remaining area.

[0005] Regarding the aforementioned technologies, manual operation makes it difficult to precisely control key parameters such as sandblasting pressure, spray angle, abrasive flow rate, and operation time. This results in poor roughness uniformity, unclear boundary contours, and even over-blasting or under-blasting. Differences in the skill level and operating habits of different operators further exacerbate product quality fluctuations, making it difficult to guarantee the surface consistency of shaft blanks from the same batch. This directly affects the precise control of subsequent machining allowances and the performance stability of finished parts. Summary of the Invention

[0006] To address the above problems, this application provides a shaft sandblasting apparatus.

[0007] This application provides a sandblasting device for shaft components, which adopts the following technical solution: A shaft sandblasting processing device includes a frame, on which a feeding mechanism, a conveying mechanism, a sandblasting processing mechanism, and a discharging mechanism are arranged sequentially along the workpiece conveying direction; a sandblasting chamber is provided on the frame, and the sandblasting processing mechanism is located inside the sandblasting chamber; the conveying mechanism is used to support and convey shafts, the feeding mechanism is used to convey the shafts to be processed one by one to the conveying mechanism, and the discharging mechanism is used to unload the sandblasted shafts from the conveying mechanism; the feeding mechanism and the discharging mechanism are respectively located at both ends of the conveying mechanism, and the sandblasting processing mechanism is located above the conveying mechanism and in the middle section of the conveying mechanism.

[0008] By adopting the above technical solutions and using an assembly line layout, integrating feeding, conveying, sandblasting, and unloading into a single operation, continuous and uninterrupted sandblasting of shafts can be achieved, eliminating the traditional manual operation mode, effectively reducing labor intensity, and significantly improving processing and production efficiency.

[0009] Preferably, the feeding mechanism includes a feeding plate, an incoming material sensor, a position positioning component, and a position sensor; the feeding plate is used to carry the shaft and is fixedly connected to the conveying mechanism; the incoming material sensor is fixed on the frame and located at the feeding end of the conveying mechanism, and is used to detect whether the shaft has reached a predetermined position; the position positioning component includes a first linear guide rail; the position sensor is fixed at the end of the first linear guide rail away from the incoming material sensor; a cantilever is fixedly connected to the slider of the first linear guide rail; a positioning plate is provided at the suspended end of the cantilever, and the positioning plate is arranged opposite to the incoming material sensor to limit the axial position of the shaft.

[0010] By adopting the above technical solution, a feeding and positioning component is set up, which, together with the incoming material sensor and the position sensor, realizes the detection of incoming shafts and precise axial positioning, ensuring that the conveying position of each shaft is uniform, avoiding shaft offset and skew, and ensuring the accuracy of subsequent sandblasting processing.

[0011] Preferably, the conveying mechanism includes a stepper motor, a drive shaft, a driven shaft, and two sets of conveyor chain assemblies, wherein the drive shaft and the driven shaft are rotatably connected to the frame. The conveyor chain assembly includes a drive sprocket, a driven sprocket, and an annular chain. The annular chain meshes with the drive sprocket and the driven sprocket. The drive sprockets of the two conveyor chain assemblies are coaxially fixed on the drive shaft, and the driven sprockets of the two conveyor chain assemblies are coaxially fixed on the driven shaft. The output end of the stepper motor is fixedly connected to the end of the drive shaft. The two ends of the feeding plate are respectively fixed on the annular chain. Multiple feeding plates are spaced apart along the length of the annular chain. Each feeding plate has an upward-facing V-shaped block fixedly connected to both ends. Multiple feeding plates are spaced apart along the length of the annular chain.

[0012] By adopting the above technical solution, the conveying mechanism uses a stepper motor in conjunction with a double-chain synchronous conveying structure. The V-block smoothly supports long shaft workpieces, and the start and stop of the conveying are precise and controllable. The conveying speed is uniform and stable, and it can be adapted to the smooth conveying of shafts of different lengths and specifications, with strong versatility.

[0013] Preferably, two sets of sandblasting mechanisms are symmetrically arranged and located on both sides of the conveying mechanism. Each sandblasting mechanism includes a sleeve, which is suspended inside the sandblasting chamber. The lower end of the sleeve is fixedly connected to a mounting plate. The center of the mounting plate has a through hole for a shaft to pass through. Several spray guns are evenly arranged on the circumference of the mounting plate. The top of the sandblasting chamber has a moving groove for the sleeve to pass through. A second linear guide rail is arranged next to the moving groove, and the sleeve is fixed on the slider of the second linear guide rail.

[0014] By adopting the above technical solution, the sandblasting mechanism adopts a double-sided symmetrical arrangement structure, with the shaft passing through the central through hole of the mounting plate. Multiple sets of spray guns distributed around the circumference can perform all-round sandblasting treatment on the outer surface of the shaft without dead angles, resulting in complete sandblasting coverage, uniform and consistent workpiece surface treatment, and high processing quality.

[0015] Preferably, a protective tube coaxial with the through hole is provided on the side of the mounting plate away from the annular chain. The protective tube is connected to the through hole, and the inner diameter of the protective tube is larger than the diameter of the through hole.

[0016] By adopting the above technical solution, the protective pipe is used to shield the non-machined area of ​​the shaft during sandblasting to prevent sand from splashing.

[0017] Preferably, mounting plates are horizontally fixedly connected to both ends of the sandblasting chamber, and cylinders are vertically fixedly connected to each mounting plate. A baffle is fixedly connected to the piston rod of each cylinder. The lower end of the sandblasting chamber is connected to a feeding hopper. Several partitions are uniformly fixedly connected to the feeding hopper along its length. The partitions have slots for a ring chain to pass through. Two partitions are located directly below the baffle, and the lower end of the baffle abuts against the upper end of the partition.

[0018] By adopting the above technical solution, liftable baffles are installed at both ends of the sandblasting chamber. The baffles open and close automatically when the shaft enters or exits the chamber, and fall back to close the chamber port during processing. This reduces the gap between the sandblasting chamber and the outside, achieving secondary sealing, effectively suppressing the overflow of sandblasting dust, and reducing the noise generated by sandblasting operations. The hopper facilitates the collection and recycling of scattered sand, reducing sand waste. In addition, partitions are evenly distributed inside the hopper to block and divert splashed sand. At the same time, slots are opened to avoid interference with the conveyor chain, and the upper ends of the two partitions abut against the lower ends of the baffles, further improving the sealing effect.

[0019] Preferably, a slide rail parallel to the second linear guide rail is fixedly connected to the movable groove, and an accordion cover covering the movable groove is fixedly connected to the sleeve, the accordion cover slidingly engaging with the slide rail.

[0020] By adopting the above technical solution, the bellows cover can seal and protect the moving trough, effectively preventing dust from overflowing from the top of the moving trough and improving the sealing and dustproof effect.

[0021] Preferably, the feeding mechanism includes a feeding sensor fixed on the frame for detecting whether there are shafts on the conveying mechanism.

[0022] By adopting the above technical solution, when the feeding sensor detects that there is no shaft, the stepper motor starts to step.

[0023] Preferably, the feeding mechanism further includes claws and push cylinders. Two claws are rotatably mounted on the frame, and each push cylinder corresponds to one claw. The tail end of the push cylinder is rotatably connected to the frame, and a rotating shaft is rotatably connected to the piston rod of the push cylinder. One end of the rotating shaft is fixedly connected to the middle of the claw. A feeding trough located at the feeding end of the conveying mechanism is provided on the frame, and the feeding trough is connected to an external receiving frame via a guide pipe.

[0024] By adopting the above technical solution, when the material sensor detects the shaft on the conveying mechanism, it pushes the cylinder to work, and the piston rod drives the pawl to rotate, which pushes the shaft V-block onto the unloading chute to complete the unloading. The automated unloading is convenient and efficient.

[0025] Preferably, an adjusting plate is provided in the feeding trough, and sliders are provided at both ends of the adjusting plate. A sliding groove parallel to the conveying direction of the conveyor frame is opened on the frame. The sliders are slidably disposed in the sliding groove. An adjusting screw is threadedly connected to the frame, and one end of the adjusting screw is rotatably connected to the adjusting plate. A rubber pad is provided on the side of the adjusting plate facing the feeding trough.

[0026] By adopting the above technical solution, the width of the feeding chute can be flexibly adjusted by sliding the adjusting plate through the adjusting screw, which can accommodate shafts of different thicknesses for smooth discharge and has a wider range of applications. Rubber material is used for cushioning and shock absorption to prevent damage from impacts when shafts roll off, ensuring the surface quality of the workpiece after sandblasting.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. By integrating feeding, conveying, sandblasting and unloading into one operation, continuous and uninterrupted sandblasting of shaft parts can be achieved, eliminating the traditional manual operation mode, effectively reducing the intensity of manual labor, and greatly improving processing and production efficiency; 2. With the help of a stepper motor and a double-chain synchronous conveyor mechanism, and the V-blocks to support the shafts, the conveyor can start and stop precisely and controllably, and the conveying speed is uniform and stable. It can be adapted to the smooth conveying of shafts of different lengths and specifications, and has strong versatility. 3. Through the symmetrically arranged sandblasting mechanism, the second linear guide rail drives the mounting plate to move, so that the mounting plate moves the shaft to the corresponding processing area. Multiple sets of spray guns distributed around the circumference can perform all-round sandblasting treatment on the outer surface of the shaft without dead angles. The sandblasting coverage is complete, the workpiece surface treatment is uniform and consistent, and the processing quality is high. The coaxial protective tube further plays a guiding and sand-blocking role, reducing sand leakage. 4. By setting baffles and cylinders, the sandblasting area of ​​the sandblasting chamber can be sealed a second time, effectively suppressing the overflow of sandblasting dust and reducing the noise generated by sandblasting operations; 5. By using a claw and pushing a cylinder, the sandblasted shaft can be automatically moved from the V-block to the unloading chute for unloading. The width of the unloading chute can be flexibly adjusted by adjusting the screw to drive the adjusting plate to slide, which can accommodate shafts of different thicknesses and has a wider range of compatibility. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the shaft sandblasting device in Embodiment 1 of this application.

[0029] Figure 2 This is a schematic diagram illustrating the structure of the conveying mechanism in Embodiment 1 of this application.

[0030] Figure 3 This is a schematic diagram illustrating the feeding mechanism in Embodiment 1 of this application.

[0031] Figure 4 yes Figure 2 The enlarged view of section A shows the structural schematic diagram of the sandblasting mechanism.

[0032] Figure 5 yes Figure 2 The enlarged view of section B is used to illustrate the connection relationship between the partition and the through slot.

[0033] Figure 6 This is a schematic diagram illustrating the material feeding mechanism in Embodiment 2 of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Sandblasting chamber; 111. Moving groove; 112. Second linear guide rail; 113. Partition plate; 1131. Through groove; 12. Cylinder; 121. Mounting plate; 122. Baffle plate; 13. Feed hopper; 14. Slide rail; 151. Bellows protective cover; 2. Feeding mechanism; 21. Feeding plate; 22. Incoming material sensor; 23. Positioning assembly; 231. First linear guide rail; 232. Cantilever; 233. Positioning plate; 24. Position sensor 3. Conveying mechanism; 31. Stepper motor; 32. Drive sprocket; 33. Driven sprocket; 34. Ring chain; 35. V-block; 4. Feeding mechanism; 41. Claw; 42. Push cylinder; 43. Feeding sensor; 5. Sandblasting mechanism; 51. Sleeve; 52. Mounting plate; 521. Through hole; 53. Protective tube; 6. Feeding trough; 61. Adjusting plate; 611. Slide groove; 62. Rubber gasket; 63. Adjusting screw; 64. Scale; 7. Spray gun. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail. Example

[0036] A sandblasting device for shaft components, as described in the reference. Figure 1 The system includes a frame 1, which is equipped with a loading mechanism 2, a conveying mechanism 3, a sandblasting processing mechanism 5, and a unloading mechanism 4 along the workpiece conveying direction. A closed sandblasting chamber 11 is fixedly mounted on the frame 1, and a discharge hopper 13 is connected to the bottom of the sandblasting chamber 11 to form a closed sandblasting operation space and control the diffusion of sandblasting dust. The sandblasting processing mechanism 5 is installed inside the sandblasting chamber 11 and is located above the conveying mechanism 3 and in the middle section of the conveying mechanism 3. The loading mechanism 2 and the unloading mechanism 4 are located at opposite ends of the conveying mechanism 3.

[0037] Reference Figure 2 , Figure 3 The feeding mechanism 2 includes a feeding plate 21, a material receiving sensor 22, a position positioning component 23, and a position sensor 24. The feeding plate 21 is fixed on the conveying mechanism 3 and is used to temporarily support the shaft to be processed. The material receiving sensor 22 is fixedly installed at the feeding end of the frame 1 and is used to detect whether the shaft is in place in real time. The position positioning component 23 includes a first linear guide rail 231, and the position sensor 24 is installed at the end of the first linear guide rail 231. A cantilever 232 is fixed on the slider of the first linear guide rail 231. A positioning plate 233 is provided at the end of the cantilever 232. The positioning plate 233 is arranged opposite to the material receiving sensor 22. When the shaft is conveyed, it is axially limited by the positioning plate 233 to ensure that each shaft is accurately positioned and to prevent axial deviation.

[0038] Reference Figure 2 , Figure 3The conveying mechanism 3 includes a stepper motor 31, a drive shaft, a driven shaft, and two sets of conveyor chain assemblies. The drive shaft and driven shaft are horizontally rotatably mounted on the frame 1. The two sets of conveyor chain assemblies are symmetrically arranged. Each conveyor chain assembly includes a drive sprocket 32, a driven sprocket 33, and an annular chain 34. The drive sprocket 32 ​​is coaxially fixed to the drive shaft, the driven sprocket 33 is coaxially fixed to the driven shaft, and the annular chain 34 meshes with the drive sprocket 32 ​​and the driven sprocket 33. The motor 31 is fixedly connected to one end of the drive shaft via a transmission assembly, and is powered by the stepper motor 31 to achieve synchronous transmission of the dual chains. The two ends of the feeding plate 21 are respectively fixed to two annular chains 34, and multiple feeding plates 21 are evenly spaced along the length of the annular chains 34. Each feeding plate 21 has an upward-facing V-shaped block 35 fixedly connected to both ends. The V-shaped block 35 fits against the outer wall of the cylindrical shaft, improving support stability and preventing rolling deviation during the transport of long shaft workpieces. The unloading mechanism 4 includes an unloading sensor 43. When the unloading sensor 43 detects no shaft, the stepper motor 31 performs one step; after the feeding sensor detects that the shaft is in place, the stepper motor 31 performs one step.

[0039] Reference Figure 2 , Figure 4 , Figure 5 Two sets of sandblasting processing mechanisms 5 are symmetrically arranged on both sides of the conveying mechanism 3. The sandblasting processing mechanism 5 includes a sleeve 51, a mounting plate 52, and a spray gun 7. A moving groove 111 is opened on the top of the sandblasting chamber 11. The opening direction of the moving groove 111 is perpendicular to the moving direction of the annular chain 34. The upper end of the sleeve 51 extends out of the moving groove 111 and is used for the air pipe of the spray gun 7 to pass through. Outside the top of the sandblasting chamber 11, a second linear guide rail 112 is arranged next to the moving groove 111. The layout direction of the linear guide rail is parallel to the opening direction of the moving groove 111. The sleeve 51 is fixed on the slider of the second linear guide rail 112. The lower end of the sleeve 51 extends from the moving groove 111 into the sandblasting chamber 11 and is fixedly connected to the mounting plate 52. The mounting plate 52 has a through hole 521 in the center for the shaft to pass through. Several spray guns 7 are evenly arranged along the circumference of the mounting plate 52 on the side facing the shaft, so as to realize all-round sandblasting operation on the outer circumference of the shaft. A protective tube 53 coaxial with the through hole 521 is provided on the side of the mounting plate 52 away from the spray guns 7. The protective tube 53 is connected to the through hole 521, and the inner diameter of the protective tube 53 is larger than the diameter of the through hole 521. It can guide the shaft, prevent sand from splashing, and avoid hard friction between the shaft and the mounting plate 52, thus protecting the surface of the workpiece.

[0040] The top of the sandblasting chamber 11 is provided with a slide rail 14 parallel to the second linear guide rail 112. A bellows cover 151 is fixed on the sleeve 51. The bellows cover 151 is slidably mounted on the slide rail 14. The bellows cover 151 covers the moving groove 111 throughout the entire process. It slides and extends with the sleeve 51, always keeping the groove opening sealed to prevent dust from overflowing from the top gap.

[0041] Reference Figure 2 , Figure 5 The sandblasting chamber 11 has horizontally fixed mounting plates 121 at both ends, and each mounting plate 121 has a vertically fixed cylinder 12. A baffle 122 is fixedly connected to the piston rod of each cylinder 12. The lower end of the sandblasting chamber 11 is connected to a hopper 13. Several partitions 113 are evenly fixedly connected along the length of the hopper 13. Each partition 113 has a through-slot 1131 for a ring chain 34 to pass through. Two partitions 113 are located directly below the baffle 122, and the lower end of the baffle 122 abuts against the upper end of the partition 113. When a shaft enters or exits the sandblasting chamber 11, the baffle 122 is raised; during sandblasting, the baffle 122 is lowered and closed, enhancing sealing and reducing noise and dust.

[0042] The implementation principle of Embodiment 1 of this application is as follows: During operation, the operator places the shaft to be processed on the loading plate 21, the incoming material sensor 22 detects that the workpiece is in place, and the positioning plate 233 completes the axial limit; the stepper motor 31 drives the chain to intermittently step forward and convey the shaft smoothly into the sandblasting chamber 11; the sliders of the two sets of second linear guide rails 112 drive the sleeve 51 to move, so that the mounting plate 52 moves to the processing area of ​​the shaft, and the circumferentially arranged spray guns 7 sandblast the processing area of ​​the shaft to remove rust and oxide scale; during the sandblasting process, the cylinders 12 on both sides drive the baffle 122 to close, the sandblasting chamber 11 remains sealed, the dust does not overflow, and the sand falls into the unloading hopper 13 for recycling; after sandblasting, the shaft moves to the unloading end under the action of the conveying chain, the operator removes the shaft from the V-block 35, and after the unloading sensor 43 detects that there is no shaft, the stepper motor 31 completes one step, that is, conveys the next shaft forward. Example

[0043] Reference Figure 6 The unloading mechanism 4 also includes an unloading sensor 43 fixed on the frame 1. The unloading mechanism 4 includes a claw 41 and a push cylinder 42. Two sets of claws 41 are symmetrically hinged at the discharge end of the frame 1. The push cylinder 42 is set one-to-one with the claws 41, and the tail of the push cylinder 42 is hinged to the frame 1. The piston rod is hinged to a rotating shaft. The other end of the rotating shaft is fixedly connected to the middle of the claw 41. When the push cylinder 42 extends and retracts, it pushes the claw 41 to rotate upward, and pushes the processed shaft out of the conveying station laterally. The frame 1 is provided with an unloading groove 6 located at the unloading end of the conveying mechanism 3. The unloading groove 6 is connected to the external receiving frame through a guide pipe to realize the directional export of the shaft.

[0044] An adjusting plate 61 is provided inside the unloading trough 6. Slider blocks are provided at both ends of the adjusting plate 61. The sliders are slidably assembled inside the slide groove 611 of the frame 1. An adjusting screw 63 is threadedly connected to the frame 1, and the end of the adjusting screw 63 is rotatably connected to the adjusting plate 61. Rotating the adjusting screw 63 can drive the adjusting plate 61 to slide laterally, changing the width of the unloading trough 6 to accommodate unloading of shafts of different diameters. A rubber pad 62 is attached to the inner side of the adjusting plate 61 to buffer and dampen shock using rubber material, preventing collision damage when the shaft rolls down and ensuring the surface quality of the workpiece after sandblasting.

[0045] The frame 1 has a scale 64 along the length of the slide 611, which can detect whether the adjustment plate 61 is skewed in time, and then fine-tune the adjustment plate 61.

[0046] The implementation principle of Embodiment 2 of this application is as follows: After the shaft is processed, it is moved out of the sandblasting chamber 11. After the material unloading sensor 43 detects the shaft, it pushes the cylinder 42 to work, which drives the claw 41 to rotate upward, thereby pushing the shaft into the unloading groove 6. The shaft is automatically discharged along the guide tube. The width of the unloading groove 6 can be changed by adjusting the screw 63 to drive the adjusting plate 61 to move. The rubber pad 62 provides buffer protection to prevent the shaft from being bumped.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sandblasting device for shaft components, comprising a frame (1), characterized in that: The frame (1) is provided with a feeding mechanism (2), a conveying mechanism (3), a sandblasting mechanism (5), and a discharging mechanism (4) arranged sequentially along the workpiece conveying direction; The frame (1) is provided with a sandblasting chamber (11), and the sandblasting processing mechanism (5) is located inside the sandblasting chamber (11); The conveying mechanism (3) is used to support and convey shafts, the loading mechanism (2) is used to convey shafts to be processed one by one to the conveying mechanism (3), and the unloading mechanism (4) is used to unload the sandblasted shafts from the conveying mechanism (3). The feeding mechanism (2) and the unloading mechanism (4) are located at both ends of the conveying mechanism (3), and the sandblasting mechanism (5) is located above the conveying mechanism (3) and in the middle section of the conveying mechanism (3).

2. The shaft sandblasting device according to claim 1, characterized in that: The feeding mechanism (2) includes a feeding plate (21), a material receiving sensor (22), a position positioning component (23), and a position sensor (24); The feeding plate (21) is used to carry the shaft and is fixedly connected to the conveying mechanism (3). The incoming material sensor (22) is fixed on the frame (1) and located at the feeding end of the conveying mechanism (3). It is used to detect whether the shaft has reached the predetermined position. The position positioning component (23) includes a first linear guide rail (231). The position sensor (24) is fixed at the end of the first linear guide rail (231) away from the incoming material sensor (22). A cantilever (232) is fixedly connected to the slider of the first linear guide rail (231). A positioning plate (233) is provided at the suspended end of the cantilever (232). The positioning plate (233) is arranged opposite to the incoming material sensor (22) to limit the axial position of the shaft.

3. The shaft sandblasting device according to claim 2, characterized in that: The conveying mechanism (3) includes a stepper motor (31), a drive shaft, a driven shaft, and two sets of conveying chain assemblies. The drive shaft and the driven shaft are rotatably connected to the frame (1). The conveyor chain assembly includes a drive sprocket (32), a driven sprocket (33), and an annular chain (34). The annular chain (34) meshes with the drive sprocket (32) and the driven sprocket (33). The drive sprockets (32) of the two conveyor chain assemblies are coaxially fixed on the drive shaft, and the driven sprockets (33) of the two conveyor chain assemblies are coaxially fixed on the driven shaft. The stepper motor (31) is fixedly connected to one end of the drive shaft through a transmission assembly. The two ends of the feed plate (21) are respectively fixed on the annular chain (34). Multiple feed plates (21) are spaced apart along the length direction of the annular chain (34). Each feed plate (21) has an upward-facing V-shaped block (35) fixedly connected to both ends. Multiple feed plates (21) are spaced apart along the length direction of the annular chain (34).

4. The shaft sandblasting processing device according to claim 3, characterized in that: The sandblasting mechanism (5) is symmetrically arranged in two sets, and is located on both sides of the conveying mechanism (3). The sandblasting mechanism (5) includes a sleeve (51), which is suspended in the sandblasting chamber (11). The lower end of the sleeve (51) is fixedly connected to an installation plate (52). The center of the installation plate (52) is provided with a through hole (521) for the shaft to pass through. Several spray guns (7) are evenly arranged along the circumference on the side of the installation plate (52) facing the shaft. The top of the sandblasting chamber (11) is provided with a movable groove (111) through which the sleeve (51) passes. A second linear guide rail (112) is provided next to the movable groove (111), and the sleeve (51) is fixed on the slider of the second linear guide rail (112).

5. The shaft sandblasting device according to claim 4, characterized in that: The mounting plate (52) is provided with a protective tube (53) coaxial with the through hole (521) on the side away from the spray gun (7). The protective tube (53) is connected to the through hole (521), and the inner diameter of the protective tube (53) is larger than the diameter of the through hole (521).

6. The shaft sandblasting device according to claim 1, characterized in that: The sandblasting chamber (11) is horizontally fixedly connected to both ends of the chamber, and each of the mounting plates (121) is vertically fixedly connected to a cylinder (12), and a baffle (122) is fixedly connected to the piston rod of the cylinder (12). The lower end of the sandblasting chamber (11) is connected to a feeding hopper (13). Several partitions (113) are uniformly fixedly connected in the feeding hopper (13) along its length. The partitions (113) have through slots (1131) for the ring chain (34) to pass through. Two partitions (113) are located directly below the baffle (122), and the lower end of the baffle (122) abuts against the upper end of the partition (113).

7. The shaft sandblasting device according to claim 4, characterized in that: A slide rail (14) parallel to the second linear guide rail (112) is fixedly connected to the moving groove (111), and a bellows cover (151) covering the moving groove (111) is fixedly connected to the sleeve (51), and the bellows cover (151) slides and engages with the slide rail (14).

8. The shaft sandblasting device according to claim 1, characterized in that: The feeding mechanism (4) includes a feeding sensor (43) fixed on the frame (1) for detecting whether there are shafts on the conveying mechanism (3).

9. A shaft sandblasting device according to claim 8, characterized in that: The feeding mechanism (4) also includes a claw (41) and a push cylinder (42). The claw (41) is rotatably mounted on the frame (1) and there are two symmetrically arranged. The push cylinder (42) is arranged in a one-to-one correspondence with the claw (41). The tail end of the cylinder body of the push cylinder (42) is rotatably connected to the frame (1). A rotating shaft is rotatably connected to the piston rod of the push cylinder (42). One end of the rotating shaft is fixedly connected to the middle of the claw (41). The frame (1) is provided with a feeding trough (6) located at the feeding end of the conveying mechanism (3), and the feeding trough (6) is connected to the external receiving frame through a guide pipe.

10. A shaft sandblasting processing device according to claim 9, characterized in that: An adjusting plate (61) is provided in the feeding trough (6), and sliders are provided at both ends of the adjusting plate (61). A slide groove (611) parallel to the conveying direction of the conveyor frame (1) is provided on the frame (1). The sliders are slidably disposed in the slide groove (611). An adjusting screw (63) is threadedly connected to the frame (1), and one end of the adjusting screw (63) is rotatably connected to the adjusting plate (61). A rubber pad (62) is provided on the side of the adjusting plate (61) facing the feeding trough (6).

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