A device and method for removing the oxide outer layer of heavy castings.

Abstract

This invention provides a device and method for removing the oxide layer from heavy castings, comprising a base, a sliding support plate that can move back and forth on the base, movable plates that can move towards each other on both sides of the base, multiple swingable turntables mounted vertically on the front side of the movable plates, adjustable rods that can be adjusted left and right slidably on the turntables, and flame nozzles mounted at the front ends of the adjustable rods, and a striking mechanism mounted on the inner side of the movable plates behind the multiple turntables, the striking mechanism including an inwardly movable abutment plate, and multiple striking rods elastically mounted from top to bottom on the inner side of the abutment plate, and an installation opening on the rear side of the right side of the movable plate, into which a scraper that can swing 90° is installed. This removal device can first achieve the heating process of the oxide layer on the heavy casting, and then knock off the oxide layer by rapid striking and high-pressure gas, with a high degree of automation and high removal efficiency.

Description

Technical Field

[0001] This invention relates to the field of heavy casting processing technology, and in particular to a device and method for removing the oxide outer layer of heavy castings. Background Technology

[0002] Casting is the process of pouring liquid metal into a casting cavity that conforms to the shape of the part, allowing it to cool and solidify to obtain a part or blank. A casting obtained through casting is called a foundry. The oxide scale, a corrosion product formed when a foundry oxidizes at high temperatures, is called oxide scale.

[0003] Currently, most methods for removing the oxide layer from large or heavy castings still rely on manual labor. This typically requires a person to hold a flame gun and heat the oxide layer, causing it to expand and break. Due to the large size of heavy castings, manual removal is extremely inefficient. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a device for removing the oxide outer layer of heavy castings. This device first heats the oxide outer layer of the heavy casting, and then knocks off the oxide outer layer by rapid hammering and high-pressure gas. It features a high degree of automation and high removal efficiency.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0006] A device for removing the oxide outer layer of heavy castings includes a base, a base plate that can slide and move back and forth on the base, movable plates that can move towards each other on both sides of the base, a plurality of swingable turntables mounted vertically on the front side of the movable plates, an adjusting rod that can be adjusted left and right slidably mounted on the turntables, a flame nozzle mounted at the front end of the adjusting rod, a striking mechanism mounted on the inner side of the movable plates behind the plurality of turntables, the striking mechanism including a backing plate that can move inward, a plurality of striking rods elastically mounted from top to bottom on the inner side of the backing plate, and an installation opening on the rear side of the right side of the movable plate, into which a scraper that can swing 90° is installed.

[0007] Preferably, a hydraulic cylinder is installed at the front end of the base, the telescopic end of the hydraulic cylinder is fixedly connected to the bottom support plate, two front-to-back guide rails are installed on the top of the base, and the bottom of the bottom support plate is slidably connected to the guide rails.

[0008] Preferably, the base has a horizontally arranged strip cavity, and a double-ended threaded rod is rotatably connected inside the strip cavity. Both sides of the double-ended threaded rod are threadedly connected to sliders. The bottom of the sliders is slidably connected to the inner wall of the strip cavity, and the top of the sliders is fixedly connected to the bottom of the corresponding moving plate. The base has a strip opening for the moving plate to pass through, and a first motor that can drive the double-ended threaded rod to rotate is installed on the base.

[0009] Preferably, a first cylinder is installed on the top front side of the movable plate, and a vertically arranged toothed plate is fixedly connected to the telescopic end of the first cylinder. The toothed plate is slidably connected to the front side of the movable plate. A rotating shaft is fixedly connected to the center of the plurality of turntables, and the end of the rotating shaft is rotatably connected to the front side of the movable plate. A gear that meshes with the toothed plate is fixedly connected to the rotating shaft.

[0010] Preferably, a sliding sleeve is fixedly connected to the front side of the plurality of turntables, the adjusting rod passes through the sliding sleeve, a locking bolt that can abut against the adjusting rod is threaded to the top of the sliding sleeve, a first spring is sleeved on the adjusting rod, and a pull ring is installed at the tail end of the adjusting rod.

[0011] Preferably, the flame nozzle is connected to a fuel supply pipe, and a valve is installed inside the fuel supply pipe.

[0012] Preferably, the striking mechanism includes a second cylinder mounted on the side wall of the movable plate, the telescopic end of the second cylinder being fixedly connected to the abutment plate, the multiple striking rods passing through the corresponding abutment plates, a limit plate being fixed on the multiple striking rods, and a second spring being elastically connected to the striking rod between the limit plate and the abutment plate.

[0013] Preferably, a second motor is installed at the top of the mounting port, the output shaft of the second motor is fixedly connected to a swing arm, a third cylinder is installed at the top of the swing arm, and the telescopic end of the third cylinder is fixedly connected to the scraper.

[0014] Preferably, a vertically arranged first air-blowing pipe is installed on the side wall of the abutment, and a second air-blowing pipe is installed on the bottom side wall of the scraper along its length. The side walls of the first and second air-blowing pipes are provided with multiple air-blowing holes. A high-pressure air pump connected to the first and second air-blowing pipes is installed on the movable plate, and a collection box 21 corresponding to the second air-blowing pipe is installed on the right side of the base.

[0015] This invention also discloses a method for removing the oxide outer layer of heavy castings, comprising the following specific steps:

[0016] S1. Lift the heavy casting onto the base plate, start the hydraulic cylinder to push the base plate backward, adjust the position of multiple adjusting rods according to the unevenness of the two sides of the heavy casting by using the sliding sleeve and locking bolts to adapt to the surface shape of the casting, and then open or close the valve in the corresponding height fuel supply pipe according to the height of the heavy casting.

[0017] S2. Multiple flame nozzles on both sides spray flames onto both sides of the casting to heat the outer oxide layer, causing it to expand and break. At the same time, the first cylinder is activated to drive the toothed plate to move up and down. Through gears and a rotating shaft, the turntable swings up and down, causing the flames to swing and spray, so that the flames can cover the entire side of the casting and the expanded and broken outer oxide layer falls off.

[0018] S3. After combustion and heating, the heavy casting continues to be pushed backward. During the process between the two abutment plates, the second cylinder is activated to drive the abutment plates to move left and right, so that multiple striking rods strike the surface of the casting. The striking rods, which are elastically set by the second spring, can be adapted to the concave and convex surfaces of the casting, and can further break and shake off the broken oxide outer layer.

[0019] S4. Start the high-pressure air pump. High-pressure gas is blown out through multiple air holes on the side wall of the first air blowing pipe, impacting the outer oxide layer and further blowing off the outer oxide layer.

[0020] S5. After adjusting the placement angle of the casting several times, the entire process of removing the oxide outer layer of the casting can be completed.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. By installing a base plate, heavy castings can be hoisted onto the base plate. Activating the hydraulic cylinder will drive the base plate to move backward, sequentially burning and heating the oxidized outer layer. After rapid hammering, combined with the impact of high-pressure gas, the broken oxidized outer layer is finally removed. Only a few adjustments to the placement angle of the heavy castings are needed to achieve a fully automated removal process with high efficiency.

[0023] 2. By installing two movable plates that can move in opposite directions, multiple adjustable rods that can be adjusted left and right, and flame nozzles, the length and position of the multiple adjustable rods can be adjusted according to the unevenness of the surface of the heavy casting through the sliding sleeve and locking bolts to adapt to the surface shape of the casting. It can also open or close the valve in the fuel supply pipe at the corresponding height according to the height of the heavy casting, which is more energy-efficient. By installing a swingable turntable, the flame can be swinged and sprayed out, so that the flame can cover the entire side.

[0024] 3. By installing a second cylinder, abutment plate, and multiple striking rods, the heavy casting, after being heated by combustion, passes between two abutment plates. The second cylinder is activated to drive the abutment plate to move rapidly left and right, causing the multiple striking rods to strike the surface of the casting. The elastically designed striking rods can adapt to the concave and convex surfaces of the casting, further breaking and shaking off the broken oxide layer. At the same time, a high-pressure air pump is activated, and high-pressure gas is blown out through multiple air holes on the side wall of the first air blowing pipe, impacting the oxide layer and further blowing off the oxide layer, thus improving the cleaning effect.

[0025] 4. By installing a scraper and a second air blowing pipe, the removed castings are lifted off the bottom support plate. The waste scattered on the bottom support plate can be driven by the third cylinder to drive the scraper to contact the bottom support plate. Then, the scraper is driven by the second motor to swing, and the scattered waste is concentrated on the right side of the bottom support plate. The waste is then blown into the collection box for collection through the second air blowing pipe and multiple air blowing holes. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the diagram;

[0028] Figure 3 This is a schematic diagram of the striking mechanism structure proposed in this invention;

[0029] Figure 4 This is a right view of the right-side movable plate proposed in this invention;

[0030] Figure 5 This is a diagram showing the scraping state of the present invention.

[0031] In the diagram: 1. Base, 2. Base plate, 3. Guide rail, 4. Double-ended threaded rod, 5. Strip cavity, 6. Strip opening, 7. Motor, 8. Slider, 9. Moving plate, 10. First cylinder, 11. Flame nozzle, 12. Toothed plate, 13. Turntable, 14. Adjusting rod, 15. Pull ring, 16. Locking bolt, 17. Sliding sleeve, 18. First spring, 19. High-pressure air pump, 20. Second cylinder, 21. Collection box, 22. Striking rod, 23. Second spring, 24. Support plate, 25. Swing arm, 26. Scraper, 27. Second air pipe, 28. Second motor, 29. Mounting port, 30. First air pipe, 31. Third cylinder, 32. Hydraulic cylinder, 33. Air hole. Detailed Implementation

[0032] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] Reference Figure 1-5 A device for removing the oxide outer layer of heavy castings includes a base 1, a bottom support plate 2 that can slide and move back and forth on the base 1, a hydraulic cylinder 32 installed at the front end of the base 1, the telescopic end of the hydraulic cylinder 32 being fixedly connected to the bottom support plate 2, two front-to-back guide rails 3 installed at the top of the base 1, and the bottom of the bottom support plate 2 being slidably connected to the guide rails 3. When the hydraulic cylinder 32 is activated, it pushes the bottom support plate 2 to move backward, and the plate passes through the processes of combustion heating, knocking, and air blowing in sequence.

[0035] Both sides of the base 1 are equipped with movable plates 9 that can move towards each other. The base 1 is equipped with a horizontally arranged strip cavity 5. A double-headed threaded rod 4 is rotatably connected in the strip cavity 5. Both sides of the double-headed threaded rod 4 are threadedly connected with sliders 8. The bottom of the sliders 8 is slidably connected to the inner wall of the strip cavity 5, and the top of the sliders 8 is fixedly connected to the bottom of the corresponding movable plate 9. The base 1 is provided with a strip opening 6 for the movable plate 9 to pass through. The base 1 is equipped with a first motor 7 that can drive the double-headed threaded rod 4 to rotate. When the first motor 7 is started, the double-headed threaded rod 4 is driven to rotate. The two sliders 8 drive the two movable plates 9 to move towards each other, thereby bringing the flame nozzle 11 close to the surface of the casting.

[0036] Multiple swingable turntables 13 are vertically mounted on the front side of the movable plate 9. A first cylinder 10 is mounted on the top of the front side of the movable plate 9. A vertically arranged toothed plate 12 is fixedly connected to the telescopic end of the first cylinder 10. The toothed plate 12 is slidably connected to the front side of the movable plate 9. A rotating shaft is fixedly connected to the center of the multiple turntables 13. The end of the rotating shaft is rotatably connected to the front side of the movable plate 9. A gear that meshes with the toothed plate 12 is fixedly connected to the rotating shaft. When the first cylinder 10 is activated, the toothed plate 12 moves up and down. The gear and the rotating shaft drive the turntables 13 to swing up and down, thereby causing the flame to swing and spray, so that the flame can cover the entire side of the casting.

[0037] An adjustable rod 14 that can be adjusted left and right is slidably mounted on the turntable 13. A flame nozzle 11 is installed at the front end of the adjustable rod 14. A sliding sleeve 17 is fixedly connected to the front side of multiple turntables 13. The adjustable rod 14 passes through the sliding sleeve 17. A locking bolt 16 that can press against the adjustable rod 14 is threaded to the top of the sliding sleeve 17. A first spring 18 is sleeved on the adjustable rod 14. A pull ring 15 is installed at the tail end of the adjustable rod 14. According to the concave and convex conditions on both sides of the heavy casting, the position of multiple adjustable rods 14 is adjusted by the sliding sleeve 17 and the locking bolt 16 to adapt to the surface shape of the casting.

[0038] Furthermore, the flame nozzle 11 is connected to a fuel supply pipe, and a valve is installed inside the fuel supply pipe. The valve inside the fuel supply pipe at the corresponding height can be opened or closed according to the height of the heavy casting, which is more energy-efficient.

[0039] A striking mechanism is installed on the inner side of the movable plate 9 behind multiple turntables 13. The striking mechanism includes a backing plate 24 that can move inward. Multiple striking rods 22 are elastically installed on the inner side of the backing plate 24 from top to bottom. The striking mechanism includes a second cylinder 20 installed on the side wall of the movable plate 9. The telescopic end of the second cylinder 20 is fixedly connected to the backing plate 24. The multiple striking rods 22 all pass through the corresponding backing plates 24. Limiting plates are fixed on the multiple striking rods 22. A second spring 23 is elastically connected to the striking rod 22 between the limiting plate and the backing plate 24. When the second cylinder 20 is activated, the backing plate 24 moves left and right, so that the multiple striking rods strike the surface of the casting. The striking rods 22, which are elastically set by the second spring 23, can adapt to the concave and convex surfaces of the casting, and can further break and shake off the broken oxide outer layer.

[0040] An installation port 29 is provided on the rear side of the right movable plate 9. A scraper 26 that can swing 90° is installed in the installation port 29. A second motor 28 is installed on the top of the installation port 29. The output shaft of the second motor 28 is fixedly connected to a swing arm 25. A third cylinder 31 is installed on the top of the swing arm 25. The telescopic end of the third cylinder 31 is fixedly connected to the scraper 26. When the third cylinder 31 is activated, the scraper 26 is driven to contact the bottom support plate 2. Then, the scraper 26 is driven to swing by the second motor 28, which concentrates the scattered waste material on the right edge of the bottom support plate 2. The waste material is then blown into the collection box 21 for collection through the second air pipe 27 and multiple air holes 33.

[0041] In addition, a vertically arranged first air pipe 30 is installed on the side wall of the abutment plate 24, and a second air pipe 27 is installed on the bottom side wall of the scraper 26 along its length. The side walls of the first air pipe 30 and the second air pipe 27 are provided with multiple air holes 33. A high-pressure air pump 19 connected to the first air pipe 30 and the second air pipe 27 is installed on the moving plate 9. A collection box 21 corresponding to the second air pipe 27 is installed on the right side of the base 1. When the high-pressure air pump 19 is started, high-pressure gas is blown out through multiple air holes 33 on the side wall of the first air pipe 30, impacting the outer oxide layer and further blowing off the outer oxide layer.

[0042] This invention also discloses a method for removing the oxide outer layer of heavy castings, comprising the following specific steps:

[0043] S1. Lift the heavy casting onto the base plate 2, start the hydraulic cylinder 32 to push the base plate 2 backward, adjust the position of multiple adjusting rods 14 according to the unevenness of the two sides of the heavy casting through the sliding sleeve 17 and locking bolt 16 to adapt to the surface shape of the casting, and then open or close the valve in the corresponding height fuel supply pipe according to the height of the heavy casting.

[0044] S2. Multiple flame nozzles 11 on both sides spray flames onto both sides of the casting to heat the outer oxide layer, causing it to expand and break. At the same time, the first cylinder 10 is started to drive the toothed plate 12 to move up and down. Through the gear and the rotating shaft, the turntable 13 is driven to swing up and down, thereby causing the flame to swing and spray, so that the flame can cover the entire side of the casting and the expanded and broken outer oxide layer falls off.

[0045] S3. After combustion and heating, the heavy casting continues to be pushed backward. During the process between the two abutment plates 24, the second cylinder 20 is activated to drive the abutment plates 24 to move left and right, so that multiple striking rods strike the surface of the casting. The striking rods 22, which are elastically set by the second spring 23, can be adapted to the concave and convex surfaces of the casting, and can further break and shake off the broken oxide outer layer.

[0046] S4. Start the high-pressure air pump 19. High-pressure gas is blown out through multiple air holes 33 on the side wall of the first air blowing pipe 30, impacting the outer oxide layer and further blowing off the outer oxide layer.

[0047] S5. After adjusting the placement angle of the casting several times, the entire process of removing the oxide outer layer of the casting can be completed.

[0048] Working process: The heavy casting is hoisted onto the base plate 2. The hydraulic cylinder 32 is activated to push the base plate 2 backward. According to the unevenness of the two sides of the heavy casting, the position of multiple adjusting rods 14 is adjusted by the sliding sleeve 17 and locking bolt 16 to adapt to the surface shape of the casting. Then, according to the height of the heavy casting, the valve in the corresponding height fuel supply pipe is opened or closed to save energy. Multiple flame nozzles 11 on both sides spray flames to both sides of the casting to heat the outer oxide layer, causing it to expand and break. At the same time, the first cylinder 10 is activated to drive the toothed plate 12 to move up and down. Through the gear and rotating shaft, the turntable 13 is driven to swing up and down, thereby causing the flame to swing and spray, so that the flame can cover the entire side of the casting, and the expanded and broken outer oxide layer falls off.

[0049] After being heated by combustion, the heavy casting continues to be pushed backward. During the process between the two abutment plates 24, the second cylinder 20 is activated to move the abutment plates 24 left and right, causing multiple striking rods to strike the surface of the casting. The striking rods 22, which are elastically set by the second spring 23, can be adapted to the concave and convex surfaces of the casting, which can further break and shake off the broken oxide outer layer. At the same time, the high-pressure air pump 19 is activated, and high-pressure gas is blown out through multiple air holes 33 on the side wall of the first air blowing pipe 30, impacting the oxide outer layer, which can further blow off the oxide outer layer and improve the removal effect.

[0050] After the casting is removed, it is lifted off the bottom support plate 21. The waste scattered on the bottom support plate can be driven by the third cylinder 31 to drive the scraper 26 to contact the bottom support plate 2. Then, the scraper 26 is driven by the second motor 28 to swing, and the scattered waste is concentrated on the right edge of the bottom support plate 2. The waste is then blown into the collection box 21 for collection through the second air pipe 27 and multiple air holes 33.

[0051] After adjusting the placement angle of the casting several times, the entire process of removing the oxide outer layer of the casting can be completed.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for removing the oxidized outer layer of heavy castings, comprising a base (1), characterized in that, The base (1) is slidably installed on the bottom support plate (2) and can move forward and backward, both sides of the base (1) are installed with movable plates (9) that can move towards each other, the front side of the movable plate (9) is installed with multiple rotatable turntables (13) in the vertical direction, the turntable (13) is slidably installed with an adjustable rod (14) that can be adjusted left and right, the front end of the adjustable rod (14) is installed with a flame nozzle (11), the inner side of the movable plate (9) is installed with a knocking mechanism behind the multiple turntables (13), the knocking mechanism includes an abutting plate (24) that can move inward, the inner side of the abutting plate (24) is elastically installed with multiple knocking rods (22) from top to bottom, the rear side of the movable plate (9) on the right side is provided with a mounting port (29), the mounting port (29) is installed with a scraper (26) that can swing 90°, the side wall of the abutting plate (24) is installed with a vertically arranged first air blowing pipe (30), the bottom side wall of the scraper (26) is installed with a second air blowing pipe (27) along the length direction, the side wall of the first air blowing pipe (30) and the second air blowing pipe (27) is provided with multiple air blowing holes (33), the movable plate (9) is installed with a high-pressure air pump (19) connected with the first air blowing pipe (30) and the second air blowing pipe (27), the right side of the base (1) is installed with a collecting box (21) corresponding to the second air blowing pipe (27).

2. An apparatus for removing the oxide outer layer of a heavy cast part according to claim 1, wherein The front end of the base (1) is installed with a hydraulic cylinder (32), the telescopic end of the hydraulic cylinder (32) is fixedly connected with the bottom support plate (2), the top of the base (1) is installed with two front and rear guide rails (3), the bottom of the bottom support plate (2) is slidably connected with the guide rail (3).

3. The apparatus of claim 1 wherein, The base (1) is installed with a transversely arranged strip-shaped cavity (5), the strip-shaped cavity (5) is rotatably connected with a double-headed threaded rod (4), both sides of the double-headed threaded rod (4) are threadedly connected with a sliding block (8), the bottom of the sliding block (8) is slidably connected with the inner wall of the strip-shaped cavity (5), the top of the sliding block (8) is fixedly connected with the bottom of the corresponding movable plate (9), the base (1) is provided with a strip-shaped port (6) for the movable plate (9) to pass through, the base (1) is installed with a first motor (7) that can drive the double-headed threaded rod (4) to rotate.

4. The apparatus of claim 1 wherein, The front top of the movable plate (9) is installed with a first air cylinder (10), the telescopic end of the first air cylinder (10) is fixedly connected with a vertically arranged tooth plate (12), the tooth plate (12) is slidably connected to the front side of the movable plate (9), the hub of the multiple turntables (13) is fixedly connected with a rotating shaft, the tail end of the rotating shaft is rotatably connected to the front side of the movable plate (9), the rotating shaft is fixedly connected with a gear that meshes with the tooth plate (12).

5. The apparatus of claim 1 wherein, The front side of the multiple turntables (13) is fixedly connected with a sliding sleeve (17), the adjustable rod (14) penetrates through the sliding sleeve (17), the top of the sliding sleeve (17) is threadedly connected with a locking bolt (16) that can abut against the adjustable rod (14), the adjustable rod (14) is sleeved with a first spring (18), the tail end of the adjustable rod (14) is installed with a pull ring (15).

6. The apparatus of claim 1 wherein, The flame spray head (11) is connected with a fuel supply pipe, and a valve is installed in the fuel supply pipe.

7. The apparatus of claim 1 wherein, The knocking mechanism comprises a second air cylinder (20) installed on the side wall of the moving plate (9), the telescopic end of the second air cylinder (20) is fixedly connected with a resisting plate (24), and the plurality of knocking rods (22) all penetrate through the corresponding resisting plates (24), the plurality of knocking rods (22) are fixedly connected with a limiting plate, and the second spring (23) is elastically connected between the limiting plate and the resisting plate (24) on the knocking rod (22).

8. The apparatus of claim 1 wherein, The top of the mounting port (29) is provided with a second motor (28), the output shaft of the second motor (28) is fixedly connected with a swing arm (25), the top of the swing arm (25) is provided with a third air cylinder (31), and the telescopic end of the third air cylinder (31) is fixedly connected with a scraping plate (26).

9. A removal method of an oxide outer layer of a heavy cast member based on the removal apparatus according to any one of claims 1 to 8, characterized by, The method comprises the following specific steps: S1, the heavy casting is hung on the bottom supporting plate (2), the hydraulic cylinder (32) is started to push the bottom supporting plate (2) to move backward, the positions of the plurality of adjusting rods (14) are adjusted through the sliding sleeve (17) and the locking bolt (16) according to the concave-convex conditions on both sides of the heavy casting, the surface shape of the casting is adapted, and the valve in the fuel supply pipe of the corresponding height is opened or closed according to the height of the heavy casting; S2, the plurality of flame spray heads (11) on both sides spray flames to both sides of the casting, heat the oxidized outer layer, make it expand and break, and the first air cylinder (10) is started to drive the tooth plate (12) to move up and down, the gear and the rotating shaft drive the rotating disc (13) to swing up and down, and then the flame swings and sprays, so that the flame can cover the whole side surface of the casting, and the broken oxidized outer layer falls off; S3, the heavy casting after combustion and heating continues to be pushed backward, and during the process between the two resisting plates (24), the second air cylinder (20) is started to drive the resisting plate (24) to move left and right, so that the plurality of knocking rods knock the surface of the casting, and the knocking rod (22) elastically arranged through the second spring (23) can adapt to the concave-convex surface of the casting, and the broken oxidized outer layer can be further broken and shaken off; S4, the high-pressure gas pump (19) is started, the high-pressure gas is blown out through the plurality of blowing holes (33) in the side wall of the first blowing pipe (30), and the oxidized outer layer is impacted, so that the oxidized outer layer can be further blown off; S5, after adjusting the placing angle of the casting for several times, the whole and all-around removal process of the oxidized outer layer of the casting can be completed.

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