A one-way circulation based abrasive particle flow uniform polishing device

Abstract

The application relates to the technical field of abrasive particle flow polishing equipment, in particular to an abrasive particle flow uniform polishing device based on one-way circulation. The device is provided with a workbench, a support, a storage tank, a conveying pump, a circulating pipe, a self-adaptive sealing mechanism, a stirring mechanism and a positioning mechanism and the like, can be adapted to workpiece ports with different diameters through elastic air bag inflation sealing design, solves the problems of poor applicability and fixed sealing joints of the existing device, effectively avoids abrasive particle flow leakage, guarantees that the abrasive particle flow fully flows through the inside of the workpiece, and improves polishing effect. The device can also prevent abrasive particles in the abrasive particle flow from settling, guarantee uniform abrasive particle concentration, and ensure the uniformity of the surface quality of the polished workpiece.

Description

Technical Field

[0001] This utility model relates to the technical field of abrasive flow polishing equipment, and in particular to a uniform polishing device based on unidirectional circulation abrasive flow. Background Technology

[0002] Abrasive flow polishing technology is a process that uses a fluid medium containing abrasive particles to flow through the internal channels of a workpiece under pressure. The workpiece is polished through friction and shearing between the abrasive particles and the workpiece surface. It is widely used in precision machinery, aerospace, automotive parts and other fields, and is especially suitable for polishing workpieces with complex internal channels, such as curved holes, blind holes and intersecting holes.

[0003] In practical applications of existing abrasive flow polishing devices, several shortcomings exist. First, during abrasive flow polishing, ensuring the abrasive flow fully passes through the internal channels of the workpiece is crucial; therefore, the sealing between the feed pipe and the workpiece port is paramount. However, existing devices typically use fixed-size sealing joints. When the diameter of the workpiece to be polished changes, the sealing joints cannot be adapted, leading to abrasive flow leakage. This not only reduces the polishing effect but also wastes the abrasive flow. Second, long-term storage of the abrasive flow in the storage tank can cause abrasive sedimentation, resulting in uneven abrasive concentration. This, in turn, leads to inconsistent polishing capacity of the abrasive flow passing through the workpiece, affecting the uniformity of the surface quality after polishing. Utility Model Content

[0004] The main objective of this invention is to propose a uniform polishing device based on unidirectional circulation abrasive flow, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a uniform polishing device based on unidirectional circulation abrasive flow, comprising: Workbench; A support frame is fixedly mounted on the upper side wall of the workbench; A storage tank is fixedly installed on one side of the upper sidewall of the workbench, and the storage tank is used to store abrasive particles. A conveying pump is fixedly mounted on a workbench. The inlet end of the conveying pump is connected to the bottom outlet of the storage tank through an inlet pipe. The outlet end of the conveying pump is connected to an outlet pipe, and the other end of the outlet pipe is connected to a first connecting pipe. A circulation pipe is installed at the top of the storage tank and communicates with its interior; the other end of the circulation pipe is connected to a second connecting pipe. An adaptive sealing mechanism is provided at the ends of the first connecting pipe and the second connecting pipe, and is used to seal the ports of different workpieces. A stirring mechanism is provided inside the storage tank, and the stirring mechanism is used to stir the abrasive flow inside the storage tank to make the abrasive concentration uniform; A positioning mechanism is mounted on a support and is used to position the workpiece to prevent displacement during polishing.

[0006] As a further description of the above technical solution, the adaptive sealing mechanism includes an abutment plate fixedly sleeved at the ends of the first connecting pipe and the second connecting pipe, and a sealing airbag embedded at the pipe opening. Two air pumps are installed on the upper side wall of the workbench. The output end of the air pump is connected to the air inlet of the sealing airbag through an air pipe. A pressure sensor is provided inside the sealing airbag.

[0007] As a further description of the above technical solution, the stirring mechanism includes a drive motor installed at the center of the top of the storage tank, the output shaft of the drive motor extends into the storage tank and is fixedly connected to a stirring shaft, and a plurality of inclined stirring blades are evenly arranged on the stirring shaft.

[0008] As a further description of the above technical solution, the positioning mechanism includes a threaded tube fixedly embedded in the center of the upper side wall of the bracket, an adjusting screw is internally threaded into the threaded tube, an upper positioning block is rotatably provided at the lower end of the adjusting screw and a handwheel is fixedly connected at the upper end, a lower positioning block is fixedly connected on the upper side wall of the workbench and directly below the upper positioning block, and rubber buffer pads are provided on the side walls of the upper and lower positioning blocks that are close to each other.

[0009] As a further description of the above technical solution, both the first connecting pipe and the second connecting pipe are flexible hoses.

[0010] As a further description of the above technical solution, a controller is fixedly connected to one side of the outer wall of the bracket, and the drive motor, air pump, air pressure sensor and delivery pump are all electrically connected to the controller.

[0011] As a further description of the above technical solution, guide rods are slidably inserted on both sides of the upper sidewall of the bracket, and the lower end of the guide rods is fixedly connected to the upper positioning block.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the adaptive sealing mechanism and the elastic airbag expansion sealing design, it can be adapted to workpiece ports of different diameters, solving the problems of fixed sealing joints and poor applicability of existing devices, effectively avoiding abrasive flow leakage, ensuring that the abrasive flow fully passes through the interior of the workpiece, and improving the polishing effect.

[0013] 2. The set stirring mechanism can prevent abrasive particles from settling in the abrasive flow, ensure uniform abrasive particle concentration, and ensure uniform surface quality of the workpiece after polishing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a uniform polishing device based on unidirectional circulation abrasive flow according to the present invention. Figure 2 This is a schematic diagram of the adaptive sealing mechanism of a uniform polishing device based on unidirectional circulation abrasive flow according to this utility model. Figure 3 This is a schematic diagram of the internal structure of the storage tank of a uniform polishing device based on unidirectional circulation abrasive flow according to the present invention. Figure 4 This is a schematic diagram of the support structure of a uniform polishing device based on unidirectional circulation abrasive flow according to the present invention. In the diagram: 1. Workbench; 2. Support; 3. Storage tank; 4. Conveying pump; 41. Feed pipe; 42. Discharge pipe; 43. First connecting pipe; 5. Circulation pipe; 51. Second connecting pipe; 6. Adaptive sealing mechanism; 7. Stirring mechanism; 8. Positioning mechanism; 61. Abutment plate; 62. Sealing airbag; 63. Air pump; 64. Air pipe; 71. Drive motor; 72. Stirring shaft; 73. Stirring blade; 81. Threaded pipe; 82. Adjusting screw; 83. Upper positioning block; 84. Handwheel; 85. Lower positioning block; 86. Rubber buffer pad; 9. Controller; 21. Guide rod. Detailed Implementation

[0015] To make the technical means, creative features, and objectives of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Please see Figures 1-4 This utility model provides a uniform polishing device based on unidirectional circulation abrasive flow, comprising: a workbench 1, a support 2, a storage tank 3, a delivery pump 4, a circulation pipe 5, an adaptive sealing mechanism 6, a stirring mechanism 7, and a positioning mechanism 8. The support 2 is fixedly mounted on the upper side wall of the workbench 1, and the storage tank 3 is fixedly mounted on one side of the upper side wall of the workbench 1. The storage tank 3 is used to store the abrasive flow. The delivery pump 4 is fixedly mounted on the workbench 1. The inlet end of the delivery pump 4 is connected to the bottom outlet of the storage tank 3 through an inlet pipe 41, and the outlet end of the delivery pump 4 is connected to an outlet pipe 42. The other end of the outlet pipe 42... One end is connected to a first connecting pipe 43, and a circulation pipe 5 is set on the top of the storage tank 3 and communicates with its interior. The other end of the circulation pipe 5 is connected to a second connecting pipe 51. An adaptive sealing mechanism 6 is set at the ends of the first connecting pipe 43 and the second connecting pipe 51. The adaptive sealing mechanism 6 is used to seal the ports of different workpieces. A stirring mechanism 7 is set inside the storage tank 3. The stirring mechanism 7 is used to stir the abrasive flow inside the storage tank 3 to make the abrasive concentration uniform. A positioning mechanism 8 is set on the bracket 2. The positioning mechanism 8 is used to position the workpiece to avoid displacement during polishing.

[0019] To further explain, the workbench 1 serves as the basic support platform for the device, providing a stable installation reference for all components, including the support frame 2, storage tank 3, and delivery pump 4. The support frame 2 is used to install the positioning mechanism 8, providing a stable mounting carrier through its own support strength, ensuring that the positioning mechanism 8 can apply a stable positioning force to the workpiece. The storage tank 3 stores the abrasive stream required for polishing, providing a continuous source of abrasive stream for the entire polishing process. Its internal space also provides a location for the installation and operation of the stirring mechanism 7. The delivery pump 4 provides power, pressurizing the abrasive stream in the storage tank 3 and delivering it to the internal channel of the workpiece, ensuring that the abrasive stream flows through the workpiece surface with sufficient pressure to achieve friction polishing. The circulation pipe 5 recovers the abrasive stream after it has flowed through the workpiece back to the storage tank 3, enabling the reuse of the abrasive stream, reducing waste, and maintaining continuous circulation of the abrasive stream. The adaptive sealing mechanism 6 can seal the ports of workpieces with different diameters, solving the problem of poor compatibility of existing fixed sealing joints, preventing leakage of the abrasive stream from the ports during transportation, ensuring that all the abrasive stream flows through the internal channel of the workpiece, and guaranteeing the polishing effect. The stirring mechanism 7 continuously stirs the abrasive flow in the storage tank 3 to prevent the abrasive particles from settling due to long-term storage, ensuring a uniform concentration of abrasive particles in the fluid. This, in turn, ensures that the polishing ability of the abrasive flow passing through the workpiece is consistent, improving the uniformity of the surface quality after polishing. The positioning mechanism 8 precisely positions and fixes the workpiece, preventing displacement or shaking of the workpiece due to the impact force of the abrasive flow during the polishing process.

[0020] It should be noted that the feed pipe 41 and the discharge pipe 42 are made of wear-resistant polyurethane tubing. The first connecting pipe 43 and the second connecting pipe 51 are made of steel wire reinforced polyurethane flexible tubing. The transfer pump 4 is a plunger-type high-pressure transfer pump with a ceramic pump head, which has excellent wear resistance and avoids abrasive erosion that could cause pump head wear.

[0021] To further explain, the adaptive sealing mechanism 6 includes an abutment plate 61 fixedly sleeved at the ends of the first connecting pipe 43 and the second connecting pipe 51, and a sealing airbag 62 embedded at the pipe opening. Two air pumps 63 are installed on the upper side wall of the workbench 1. The output end of the air pump 63 is connected to the air inlet of the sealing airbag 62 through an air pipe 64. A pressure sensor is provided inside the sealing airbag 62.

[0022] To further explain, the abutment plate 61 abuts against the end face of the workpiece port during sealing, providing support for the sealing airbag 62, preventing excessive compression and deformation of the sealing airbag 62, and ensuring a stable contact position between the sealing airbag 62 and the workpiece port. The sealing airbag 62 expands after being inflated by the air pump 63, allowing it to tightly conform to the inner wall of workpiece ports of different diameters, achieving self-adaptive sealing and solving the problem of fixed joints being unable to adapt to workpieces of different diameters. The air pump 63 provides inflation power to the sealing airbag 62, adjusting the inflation amount according to the workpiece diameter to control the degree of expansion of the sealing airbag 62 and ensure a good sealing effect. A pressure sensor monitors the air pressure value inside the sealing airbag 62 in real time and transmits the data to the controller 9, allowing the controller 9 to determine the expansion state of the sealing airbag 62 and prevent excessively high pressure from causing the sealing airbag 62 to rupture or excessively low pressure from causing sealing failure.

[0023] To further explain, the stirring mechanism 7 includes a drive motor 71 installed at the center of the top of the storage tank 3. The output shaft of the drive motor 71 extends into the storage tank 3 and is fixedly connected to a stirring shaft 72. Several inclined stirring blades 73 are evenly arranged on the stirring shaft 72.

[0024] To further explain, the drive motor 71 serves as the power source for the stirring mechanism 7. Its output shaft drives the stirring shaft 72 to rotate, providing continuous and stable power for the stirring action. The stirring shaft 72 transmits the power from the drive motor 71, causing the stirring blades 73 to rotate synchronously. The inclined stirring blades 73 can fully agitate the abrasive flow at different depths within the storage tank 3 during rotation, avoiding dead zones in the stirring process. In particular, they can turn up the abrasive particles that easily settle at the bottom of the storage tank 3, ensuring that the abrasive particles are evenly distributed in the fluid and improving the stirring effect.

[0025] To further explain, the positioning mechanism 8 includes a threaded tube 81 fixedly embedded in the center of the upper side wall of the bracket 2. An adjusting screw 82 is internally threaded into the threaded tube 81. An upper positioning block 83 is rotatably provided at the lower end of the adjusting screw 82, and a handwheel 84 is fixedly connected to the upper end. A lower positioning block 85 is fixedly connected to the upper side wall of the workbench 1 and directly below the upper positioning block 83. Rubber buffer pads 86 are provided on the side walls of the upper positioning block 83 and the lower positioning block 85 that are close to each other.

[0026] Further explanation: The threaded tube 81 provides guidance and support for the lifting and lowering of the adjusting screw 82. Precise lifting and lowering of the adjusting screw 82 is achieved through threaded transmission, ensuring the position adjustment accuracy of the upper positioning block 83. The adjusting screw 82 rotates, driving the upper positioning block 83 to move up and down, achieving positioning adaptation for workpieces of different heights. Simultaneously, the self-locking performance of the threaded transmission ensures the stability of the upper positioning block 83 after positioning, preventing it from moving due to external forces. The upper positioning block 83 and the lower positioning block 85 work together to form a clamping and positioning system for the workpiece. The lower positioning block 85 is fixed to the workbench 1, providing bottom support for the workpiece. The upper positioning block 83 applies pressure by moving downwards, firmly fixing the workpiece between them and preventing displacement. The handwheel 84 allows operators to manually rotate the adjusting screw 82, improving convenience. The rubber buffer pad 86 prevents direct rigid contact with the workpiece during clamping, preventing damage or scratches to the workpiece surface. Simultaneously, the elasticity of the rubber increases the friction between the upper and lower positioning blocks 83 and the workpiece, improving positioning stability.

[0027] To further clarify, both the first connecting pipe 43 and the second connecting pipe 51 are flexible tubes.

[0028] To further explain, the increased flexibility of the first connecting tube 43 and the second connecting tube 51 serves two purposes. First, when connecting workpieces of different sizes or shapes, the flexible tube can slightly adjust its angle and length according to the position of the workpiece port, ensuring precise connection with the workpiece port. Second, when the positioning mechanism 8 adjusts the workpiece position, the flexible tube will not affect the workpiece positioning operation due to rigidity, while also preventing damage to the first connecting tube 43 and the second connecting tube 51 due to rigid collisions, thus extending their service life.

[0029] To further explain, a controller 9 is fixedly connected to one side of the outer wall of the bracket 2, and the drive motor 71, air pump 63, air pressure sensor and delivery pump 4 are all electrically connected to the controller 9.

[0030] To further explain, the controller 9 receives air pressure data from the air pressure sensor of the sealing airbag 62 and automatically controls the inflation or deflation of the air pump 63 to ensure that the air pressure of the sealing airbag 62 is maintained within a reasonable range, achieving automatic adjustment of adaptive sealing. Based on polishing requirements, the controller controls the speed of the drive motor 71 and adjusts the stirring intensity of the stirring blades 73 to ensure uniform abrasive particle concentration. The controller also controls the output power of the delivery pump 4 to adjust the delivery pressure and flow rate of the abrasive particle stream, adapting to the polishing requirements of workpieces made of different materials.

[0031] It should be noted that the controller 9 mentioned above uses an STM32 microcontroller. The input and output pins of the microcontroller are connected to the drive motor 71, air pump 63, air pressure sensor and delivery pump 4 as described above, and can be implemented by programming the microcontroller. The circuit and program used are common technologies in the field of microcontrollers. Those skilled in the art can easily derive the specific circuit based on the above control relationship description. Therefore, the specific circuit will not be described in detail in this article.

[0032] To further explain, guide rods 21 are slidably inserted on both sides of the upper sidewall of bracket 2, and the lower end of the guide rods 21 is fixedly connected to the upper positioning block 83.

[0033] To further explain, the guide rod 21 provides guidance for the lifting and lowering of the upper positioning block 83, preventing the upper positioning block 83 from rotating synchronously with the adjusting screw 82, ensuring that the upper positioning block 83 always remains horizontal and is precisely aligned with the lower positioning block 85, thereby ensuring the positioning accuracy of the workpiece, while reducing the radial force on the adjusting screw 82 and extending its service life.

[0034] It should be noted that this utility model is a uniform polishing device based on unidirectional circulation abrasive flow. In use, the operator first places the workpiece to be polished on the lower positioning block 85 on the workbench 1. Then, the handwheel 84 of the positioning mechanism 8 is rotated. The handwheel 84 drives the adjusting screw 82 to rotate downwards within the threaded tube 81. The upper positioning block 83 at the lower end of the adjusting screw 82 descends smoothly along the guide rods 21 on both sides until the rubber buffer pads 86 on the upper positioning block 83 and lower positioning block 85 are in close contact with the workpiece surface, firmly fixing the workpiece and completing the positioning. The controller 9 is then activated, controlling the two air pumps 63 on the workbench 1 to operate. The air pumps 63 inflate the sealing airbags 62 at the ends of the first connecting pipe 43 and the second connecting pipe 51 through the air pipe 64. The air pressure sensor inside the sealing airbag 62 transmits air pressure data to the controller 9 in real time. When the air pressure reaches the preset value, the controller 9 controls the air pump 63 to stop inflating, completing the sealing of the workpiece port and preventing leakage of abrasive flow. The preset value is set according to the workpiece diameter to ensure that the sealing airbag 62 tightly fits the inner wall of the workpiece port after expansion. The controller 9 starts the drive motor 71 of the stirring mechanism 7. The output shaft of the drive motor 71 drives the stirring shaft 72 to rotate. The inclined stirring blades 73 on the stirring shaft 72 stir the abrasive flow in the storage tank 3 to ensure that the abrasive particles are evenly distributed in the fluid. Then, the controller 9 sets the polishing parameters, including the abrasive flow delivery pressure and polishing time, and adjusts them according to the workpiece material and polishing requirements. Subsequently, the controller 9 starts the delivery pump 4. The delivery pump 4 draws a uniform abrasive flow from the bottom of the storage tank 3 through the feed pipe 41, pressurizes it through the discharge pipe 42 and the first connecting pipe 43, and delivers it to the polishing channel inlet of the workpiece. Under pressure, the abrasive flow flows through the internal channel of the workpiece, and polishing is achieved through the friction and shearing action between the abrasive particles and the workpiece surface. After passing through the workpiece, the abrasive stream exits from the polishing channel outlet, enters the circulation pipe 5 via the second connecting pipe 51, and finally returns to the storage tank 3 through the circulation pipe 5. During this process, the stirring mechanism 7 continuously operates to re-stir the returning abrasive stream, ensuring that the abrasive concentration remains uniform and achieving unidirectional recycling of the abrasive stream. During polishing, the controller 9 continuously receives air pressure data from the air pressure sensor. If the air pressure drops due to leakage in the sealing airbag 62, the controller 9 automatically controls the air pump 63 to replenish air and maintain the sealing effect. When the polishing time reaches the preset value, the controller 9 first controls the delivery pump 4 to stop working, cutting off the delivery of the abrasive stream, then controls the drive motor 71 to stop stirring, ending the stirring of the abrasive stream, and finally controls the air pump 63 to release air, causing the sealing airbag 62 to contract and release the seal on the workpiece port. The operator rotates the handwheel 84 in the opposite direction, and the adjusting screw 82 drives the upper positioning block 83 to rise along the guide rod 21, releasing the clamp on the workpiece and removing the polished workpiece from the lower positioning block 85. Then clean the remaining abrasive particles at the openings of the first connecting pipe 43 and the second connecting pipe 51, check the remaining amount of abrasive particles in the storage tank 3, and if the amount of abrasive particles is insufficient, replenish the abrasive particles to prepare for the next polishing operation.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A uniform polishing device based on unidirectional circulating abrasive flow, characterized in that, include: Workbench (1); The bracket (2) is fixedly installed on the upper side wall of the workbench (1); Storage tank (3), which is fixedly installed on one side of the upper side wall of the workbench (1), is used to store abrasive flow; The conveying pump (4) is fixedly installed on the workbench (1). The feed end of the conveying pump (4) is connected to the bottom outlet of the storage tank (3) through the feed pipe (41). The discharge end of the conveying pump (4) is connected to the discharge pipe (42). The other end of the discharge pipe (42) is connected to the first connecting pipe (43). A circulation pipe (5) is installed on the top of the storage tank (3) and communicates with its interior. The other end of the circulation pipe (5) is connected to a second connecting pipe (51). An adaptive sealing mechanism (6) is provided at the ends of the first connecting pipe (43) and the second connecting pipe (51). The adaptive sealing mechanism (6) is used to seal the ports of different workpieces. A stirring mechanism (7) is provided inside the storage tank (3). The stirring mechanism (7) is used to stir the abrasive flow inside the storage tank (3) to make the abrasive concentration uniform. Positioning mechanism (8) is mounted on bracket (2) and is used to position the workpiece to avoid displacement during polishing.

2. The abrasive flow uniform polishing device based on unidirectional circulation according to claim 1, characterized in that: The adaptive sealing mechanism (6) includes an abutment plate (61) fixedly sleeved at the ends of the first connecting pipe (43) and the second connecting pipe (51) and a sealing airbag (62) embedded at the pipe opening. Two air pumps (63) are installed on the upper side wall of the workbench (1). The output end of the air pump (63) is connected to the air inlet of the sealing airbag (62) through an air pipe (64). A pressure sensor is provided inside the sealing airbag (62).

3. The abrasive flow uniform polishing device based on unidirectional circulation according to claim 2, characterized in that: The stirring mechanism (7) includes a drive motor (71) installed at the center of the top of the storage tank (3). The output shaft of the drive motor (71) extends into the storage tank (3) and is fixedly connected to a stirring shaft (72). Several inclined stirring blades (73) are evenly arranged on the stirring shaft (72).

4. The abrasive flow uniform polishing device based on unidirectional circulation according to claim 1, characterized in that: The positioning mechanism (8) includes a threaded tube (81) fixedly embedded in the center of the upper side wall of the bracket (2). An adjusting screw (82) is internally threaded into the threaded tube (81). An upper positioning block (83) is rotatably provided at the lower end of the adjusting screw (82), and a handwheel (84) is fixedly connected at the upper end. A lower positioning block (85) is fixedly connected to the upper side wall of the workbench (1) and directly below the upper positioning block (83). Rubber buffer pads (86) are provided on the side walls of the upper positioning block (83) and the lower positioning block (85) that are close to each other.

5. The abrasive flow uniform polishing device based on unidirectional circulation according to claim 1, characterized in that: Both the first connecting pipe (43) and the second connecting pipe (51) are flexible hoses.

6. The abrasive flow uniform polishing device based on unidirectional circulation according to claim 3, characterized in that: A controller (9) is fixedly connected to one side of the outer wall of the bracket (2). The drive motor (71), air pump (63), air pressure sensor and delivery pump (4) are all electrically connected to the controller (9).

7. The abrasive flow uniform polishing device based on unidirectional circulation according to claim 4, characterized in that: Guide rods (21) are slidably inserted on both sides of the upper sidewall of the bracket (2), and the lower end of the guide rods (21) is fixedly connected to the upper positioning block (83).

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