A vertical shot blasting machine

Abstract

The present invention discloses a vertical shot blasting machine, which relates to the technical field of shot blasting machines and includes a processing chamber, the top of which is detachably connected to a circulation top plate, the top of which is provided with a channel for accommodating steel shots, a pair of shot blasting units being mounted on the circulation top plate, and a pair of air guide covers being mounted on the inner top wall of the circulation top plate, the air guide covers extending in a trumpet shape. The present invention is provided with an air guide cover, which can disperse part of the steel shots falling through the channel in an annular shape, thereby expanding the spray angle of the steel shots and the contact range with the workpiece. Part of the steel shots in contact with the surface of the air guide cover can fall through the first circulation notch, the blanking channel, and the second circulation notch at different positions, and part of the steel shots passing through the opening of the air guide cover can be guided by the guide plate to fall together, so that a large number of steel shots can be fully dispersed and contact different positions of the workpiece, thereby improving processing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of shot blasting machines, in particular to a vertical shot blasting machine. Background Art

[0002] Shot blasting involves using a high-speed rotating flywheel to apply centrifugal force to project 0.2-3.0mm diameter projectiles onto the workpiece surface, achieving a desired surface roughness. This can also be used to convert tensile stress in welds into compressive stress, thereby increasing the workpiece's service life. Almost all steel castings, gray castings, malleable cast iron castings, and ductile iron castings undergo shot blasting. This not only removes surface scale and grit, but also serves as an essential preparatory step before casting quality inspection. For example, large steam turbine casings must undergo rigorous shot blasting prior to nondestructive testing (NDT) to ensure reliable results. In general casting production, shot blasting is an essential process for detecting surface defects such as subcutaneous pores, slag holes, grit buildup, cold shuts, and scaling.

[0003] Existing vertical shot blasting machines typically use a conveyor belt to transport workpieces to be shot blasted into the machine's processing chamber, where flywheel shot blasting is performed on the workpieces. Due to the limited specifications of the flywheel, the ejection angle of the steel shot is also limited, and the contact angle with the workpiece is usually within a fixed range. If different workpieces are shot blasted, the steel shot is prone to incomplete contact with the workpiece. Furthermore, because the steel shot is constantly thrown at a fixed angle, it is easy for the workpiece to be processed at a blind spot, requiring repeated adjustments to the workpiece position, reducing processing efficiency. Summary of the Invention

[0004] In response to the above problems, the present application provides a vertical shot blasting machine.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a vertical shot blasting machine, comprising a processing chamber, the top of the processing chamber being detachably connected to a circulation top plate, the top of the circulation top plate being provided with a channel for accommodating the ejection of steel shots, a pair of shot blasting units being installed on the circulation top plate, a pair of air guide covers being installed on the inner top wall of the circulation top plate, the air guide covers extending in a trumpet shape, and the opening of the air guide covers being located directly below the shot blasting units.

[0006] The outer surface of the air guide cover is provided with a plurality of first flow gaps, blanking channels and second flow gaps arranged in a ring from top to bottom. The first flow gaps, blanking channels and second flow gaps can all accommodate the falling of steel shots. The first flow gap is connected to the upper opening of the air guide cover, and the second flow gap is connected to the lower opening of the air guide cover. A material leveling structure is provided on the inner side and lower part of the air guide cover.

[0007] Furthermore, the shot blasting unit includes a circulation seat installed on the top of the circulation top plate, a receiving plate installed on the outside of the circulation seat, and a material guide impeller located in the inner cavity of the circulation seat. A servo motor is installed on the receiving plate, and the main shaft of the servo motor passes through the circulation seat and is docked with the material guide impeller.

[0008] A pipeline interface is provided on the side of the circulation seat, and a discharge port is provided below the circulation seat, and the discharge port is directly opposite to the channel position opened on the circulation top plate.

[0009] Furthermore, the inner sides of the first flow gaps are fixedly connected with guide plates, and the guide plates are located above the material-splitting structure.

[0010] Furthermore, the material leveling structure includes a support plate located on the inner side of the opening below the air guide cover, a servo motor 2 is installed below the support plate, and a pair of protective shields are detachably connected below the support plate, and the pair of protective shields are located on the outside of the servo motor 2.

[0011] The main shaft of the servo motor 2 passes through the support plate and extends to the top of the support plate and is connected to a rotating shaft. A plurality of dispersing blades for dispersing steel shots are fixedly connected to the side of the rotating shaft.

[0012] Furthermore, an arc-shaped cutting notch is provided on the surface of the dispersion blade, and the top end of the rotating shaft is a hemispherical structure.

[0013] Furthermore, protective door 1 and protective door 2 are provided at the openings on both sides of the processing chamber, and a conveyor belt is installed below the processing chamber, a recovery rack is provided below the conveyor belt, and the recovery rack is connected to a steel shot recovery tower through a conveying pipe.

[0014] Furthermore, a pair of mounting rods are fixedly connected to the outer side wall of the air guide cover, and the mounting rods are connected to the inner top wall of the flow top plate by screws.

[0015] Furthermore, the bottom end of the support plate is connected to an alignment rod via screws, and the alignment rod is installed on the inner wall of the processing chamber via screws.

[0016] In summary, the technical effects and advantages of the present invention are:

[0017] 1. The present invention is equipped with a deflector, which disperses the steel shots that fall through the channel into a circular pattern, expanding the shot's spray angle and the range of contact with the workpiece. The steel shots that contact the deflector surface fall through the first flow slot, the drop channel, and the second flow slot at different locations. The steel shots that pass through the opening of the deflector are guided by the guide plate and fall in a concentrated manner. This allows a large number of steel shots to be fully dispersed and contact different locations on the workpiece, thereby improving processing efficiency.

[0018] 2. The present invention is also provided with a material leveling structure. Part of the steel shots falling onto the surface of the dispersion blades can be evenly dispersed and fallen as the dispersion blades rotate, while part can fall vertically through the discharge notch. In this process, the steel shots falling into the inner side of the shroud through the guide plate, the discharge channel, and the second flow notch can be evenly dispersed, thereby improving the uniformity of the steel shots falling on different loops with the rotating shaft as the central axis, and effectively ensuring that the steel shots fall evenly and accurately onto the workpiece surface. The blind spots of the shroud for the steel shots are reduced, effectively avoiding the occurrence of blind spots in the shot blasting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure from the second viewing angle of the present invention.

[0022] Figure 3 This is a schematic structural diagram of the third viewing angle of the present invention.

[0023] Figure 4 It is a schematic diagram of the cross-sectional opening structure of the processing chamber and the circulation seat of the present invention.

[0024] Figure 5 Schematic diagram of the internal structure of the circulation seat of the present invention.

[0025] Figure 6 Schematic diagram of the air guide cover of the present invention.

[0026] Figure 7 This is a schematic structural diagram of the air deflector of the present invention from a second viewing angle.

[0027] Figure 8 This is a schematic diagram of the position structure of the servo motor 2 and the support plate of the present invention.

[0028] In the figure: 1. Processing room; 11. Circulation top plate; 12. Protective door 1; 13. Protective door 2; 14. Conveyor belt; 15. Recovery rack; 16. Conveying pipe; 17. Steel shot recovery tower; 2. Circulation seat; 21. Receiver plate; 22. Discharge port; 23. Pipe interface; 24. Guide impeller; 3. Servo motor 1; 4. Guide cover; 41. First circulation gap; 42. Discharge channel; 43. Second circulation gap; 44. Guide plate; 45. Mounting rod; 5. Support plate; 6. Servo motor 2; 7. Rotating shaft; 8. Dispersion fan blade; 81. Discharge gap; 9. Protective cover; 10. Alignment rod. DETAILED DESCRIPTION

[0029] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] Example 1: Reference Figure 1 、 Figure 2 and Figure 3 A vertical shot blasting machine shown includes a processing chamber 1, and the top of the processing chamber 1 is detachably connected to a circulation top plate 11. The top of the circulation top plate 11 is provided with a channel for accommodating steel shots. A pair of shot blasting units are installed on the circulation top plate 11. During the use of the vertical shot blasting machine, the workpiece is located inside the processing chamber 1. The shot blasting unit installed on the circulation top plate 11 can throw the steel shots into the interior of the processing chamber 1, and contact with the workpiece inside the processing chamber 1, which has a cleaning and strengthening effect on the surface of the workpiece. Due to the limited specifications of the shot blasting unit, in order to expand the contact range between the steel shots and the workpiece inside the processing chamber 1, a pair of air guide covers 4 are installed on the inner top wall of the circulation top plate 11. The air guide covers 4 extend in a trumpet shape, and the opening of the air guide covers 4 is located directly below the shot blasting unit.

[0031] The outer surface of the air guide cover 4 is provided with a plurality of first flow gaps 41, drop channels 42 and second flow gaps 43 arranged in a ring from top to bottom. The first flow gaps 41, drop channels 42 and second flow gaps 43 can all accommodate the falling of steel shots. The first flow gap 41 is connected to the upper opening of the air guide cover 4, and the second flow gap 43 is connected to the lower opening of the air guide cover 4. A material leveling structure is provided on the inner side and at the bottom of the air guide cover 4.

[0032] During the operation of the shot blasting unit, due to the rectangular channel, some of the steel shots falling through the channel can be dispersed in a circular shape under the horn structure of the air deflector 4, changing the contact angle between the steel shots and the workpiece and expanding the contact range between the steel shots and the workpiece. At the same time, to improve the uniformity of the steel shot falling process, some of the steel shots that contact the surface of the air deflector 4 can fall through the first flow gap 41, the material drop channel 42, and the second flow gap 43 at different positions to contact the material leveling structure.

[0033] like Figure 5 As shown, the shot blasting unit includes a circulation seat 2 installed on the top of the circulation top plate 11, a receiving plate 21 installed on the outside of the circulation seat 2, and a material guide impeller 24 located in the inner cavity of the circulation seat 2. A servo motor 3 is installed on the receiving plate 21, and the main shaft of the servo motor 3 passes through the circulation seat 2 and is docked with the material guide impeller 24.

[0034] A pipe interface 23 is provided on the side of the circulation seat 2, and a discharge port 22 is provided below the circulation seat 2, facing the channel position defined in the circulation top plate 11. The pipe interface 23 is connected to the steel shot storage rack, which can transport steel shots into the circulation seat 2. As the servo motor 3 and the guide impeller 24 rotate, the steel shots are ejected into the inner cavity of the processing chamber 1.

[0035] like Figure 6 As shown, the inner side of the first flow notch 41 is fixedly connected to a guide plate 44, which is located above the material sparging structure. After the steel shots pass through the discharge port 22 and the channel, some of the steel shots can be guided downward by the outer wall of the air guide 4. At the same time, some of the steel shots still pass through the opening of the air guide 4 and fall into the inner side of the air guide 4. Since some of the steel shots guided downward by the outer wall of the air guide 4 can enter the inner side of the air guide 4 again through the discharge channel 42 and the second flow notch 43, some of the steel shots that pass through the opening of the air guide 4 can be guided downward by the guide plate 44, thereby ensuring the uniformity of the number of steel shots distributed to different loops.

[0036] Example 2: Figure 7 、 Figure 8 As shown, the material-splitting structure includes a support plate 5 located inside the opening below the air deflector 4. A servo motor 6 is mounted below the support plate 5. A pair of protective shields 9 are detachably connected below the support plate 5 and located outside the servo motor 6. The purpose of providing the protective shields 9 is to protect the servo motor 6 from being struck by steel balls, thereby ensuring the structural stability and safety of the servo motor 6.

[0037] The main shaft of servo motor 2 (6) extends through support plate 5 and extends above it, connected to a rotating shaft (7). Multiple dispersing blades (8) for dispersing the steel shot are fixedly attached to the side of rotating shaft (7). During the shot peening process, servo motor 2 (6) is powered on, and further, rotating shaft (7) and dispersing blades (8) rotate synchronously. This process evenly disperses the steel shot that has passed through guide plate 44, drop channel 42, and second flow notch (43) and dropped into the inner side of shroud 4, ensuring full contact with the workpiece. This process reduces blind spots in shroud 4 that drain the steel shot.

[0038] like Figure 8 As shown, the surface of the dispersion blade 8 is provided with an arc-shaped discharge notch 81. As the steel shot falls onto the surface of the dispersion blade 8, a portion of the steel shot can be evenly dispersed and dropped as the dispersion blade 8 rotates, while a portion of the steel shot can fall vertically through the discharge notch 81. This process improves the uniformity of the steel shot falling along different loops centered on the rotating shaft 7, effectively ensuring that the steel shot falls evenly and accurately onto the workpiece surface. The top of the rotating shaft 7 is a hemispherical structure. This allows the steel shot to slide down smoothly, preventing the steel shot from being trapped on the rotating shaft 7 and ensuring the complete drop of the steel shot.

[0039] like Figure 3 、 Figure 4 As shown, the openings on both sides of the processing chamber 1 are provided with a protective door 12 and a protective door 2 13, which can prevent the steel shot inside the processing chamber 1 from being ejected and ensure the safety during the processing. A conveyor belt 14 is installed below the processing chamber 1, which can move the workpiece to be shot blasted into and out of the processing chamber 1. A recovery rack 15 is provided below the conveyor belt 14, and the recovery rack 15 is connected to a steel shot recovery tower 17 through a conveying pipe 16. A screw conveying device (not shown in the figure) is installed in the conveying pipe 16. The screw conveying device is widely used in the recovery of steel shots. The mixture of steel shots and rust is transported to the interior of the steel shot recovery tower 17. After separation treatment, it is conducive to the recovery and reuse of the steel shots.

[0040] like Figure 5 、 Figure 6 As shown, a pair of mounting rods 45 are fixedly connected to the outer wall of the air deflector 4. The mounting rods 45 are screwed to the inner top wall of the circulation top plate 11. The pair of mounting rods 45 maintains the stable installation of the air deflector 4 and the circulation top plate 11. They also allow for regular disassembly and maintenance of the air deflector 4, ensuring the structural strength of the air deflector 4 during long-term operation.

[0041] like Figure 4 、 Figure 6 As shown, the bottom end of the support plate 5 is connected to a positioning rod 10 by screws, and the positioning rod 10 is fixed to the inner wall of the processing chamber 1 by screws. The purpose of providing the positioning rod 10 is to maintain the stability of the support plate 5. The positioning rod 10 has a circular curved rod structure and is not easily deformed, thereby improving the structural strength of the support plate 5.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vertical shot blasting machine, comprising a processing chamber (1), the top of the processing chamber (1) being detachably connected to a circulation top plate (11), the top of the circulation top plate (11) being provided with a channel for accommodating steel shots, characterized in that: A pair of shot blasting units are mounted on the circulation top plate (11), and a pair of air guide covers (4) are mounted on the inner top wall of the circulation top plate (11), wherein the air guide covers (4) extend in a trumpet shape, and the openings of the air guide covers (4) are located directly below the shot blasting units; The outer surface of the air guide cover (4) is provided with a plurality of first flow gaps (41), material drop channels (42) and second flow gaps (43) arranged in an annular manner from top to bottom. The first flow gaps (41), material drop channels (42) and second flow gaps (43) can all accommodate the falling of steel shots. The first flow gaps (41) are connected to the upper opening of the air guide cover (4), and the second flow gaps (43) are connected to the lower opening of the air guide cover (4). A material leveling structure is provided on the inner side and at the lower side of the air guide cover (4). The material-splitting structure includes a support plate (5) located inside an opening below the air guide cover (4), a servo motor 2 (6) is installed below the support plate (5), and a pair of shields (9) are detachably connected below the support plate (5), and the pair of shields (9) are located outside the servo motor 2 (6); The main shaft of the second servo motor (6) passes through the support plate (5) and extends to the top thereof and is connected to a rotating shaft (7). The side of the rotating shaft (7) is fixedly connected to a plurality of dispersing blades (8) for dispersing steel shots. The surface of the dispersing blade (8) is provided with an arc-shaped material removal notch (81), and the top end of the rotating shaft (7) is in a hemispherical structure.

2. A vertical shot blasting machine according to claim 1, characterized in that: The shot blasting unit comprises a circulation seat (2) mounted on the top of a circulation top plate (11), a receiving plate (21) mounted on the outside of the circulation seat (2), and a guide impeller (24) located in the inner cavity of the circulation seat (2); a servo motor (3) is mounted on the receiving plate (21); a main shaft of the servo motor (3) passes through the circulation seat (2) and is docked with the guide impeller (24); A pipe interface (23) is provided on the side of the circulation seat (2), and a discharge port (22) is provided below the circulation seat (2), and the discharge port (22) is directly opposite to the channel position provided on the circulation top plate (11).

3. A vertical shot blasting machine according to claim 1, characterized in that: The inner side of each of the first flow openings (41) is fixedly connected with a guide plate (44), and the guide plate (44) is located above the material-splitting structure.

4. A vertical shot blasting machine according to claim 1, characterized in that: A protective door 1 (12) and a protective door 2 (13) are provided at the openings on both sides of the processing chamber (1), and a conveyor belt (14) is installed below the processing chamber (1), and a recovery rack (15) is provided below the conveyor belt (14), and the recovery rack (15) is connected to a steel shot recovery tower (17) through a conveying pipe (16).

5. The vertical shot blasting machine according to claim 1, characterized in that: A pair of mounting rods (45) are fixedly connected to the outer side wall of the deflector (4), and the mounting rods (45) are connected to the inner top wall of the circulation top plate (11) via screws.

6. A vertical shot blasting machine according to claim 1, characterized in that: The bottom end of the support plate (5) is connected to an alignment rod (10) via screws, and the alignment rod (10) is mounted on the inner wall of the processing chamber (1) via screws.

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