A sand blasting device for rust removal of metal surface

Abstract

The utility model discloses a sand blasting device is used to metal surface rust removal, including box, the inner chamber bottom of box is recovery area, the inside of box is equipped with reciprocating sand blasting mechanism near the top department, and equipment operation stability is good: the elastic protective net is set between the chute and the screening board, can effectively block sand material and enter the inner chamber of chute, avoid sand material to the interference that sliding block slides to cause, the movable mouth design of the shaft that goes through elastic protective net does not influence its normal rotation, has guaranteed the smooth operation of screening mechanism, has prolonged the service life of equipment, and the convenience has promoted: the movable door that passes through the hinge connection is equipped with right side of box, and cooperates the design of the material taking opening, and the convenient operator carries out the workpiece's taking and places and the maintenance cleaning of equipment inside, has simplified the operation process, has improved work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of metal surface rust removal technology, and in particular to a sandblasting device for metal surface rust removal. Background Technology

[0002] In the field of metal processing, rust removal from metal surfaces is a crucial process to ensure the quality and service life of subsequent metal products. Sandblasting is widely used due to its high efficiency and excellent rust removal effect. Its principle is to use high-speed jets of abrasive to impact and rub against the metal surface to remove rust, oxide scale, and other impurities.

[0003] However, existing sandblasting equipment still has many shortcomings in practical use: First, the sandblasting mechanism is mostly fixed or can only move in one direction, making it difficult to achieve uniform coverage of the workpiece surface, resulting in inconsistent rust removal effects and potential issues such as incomplete rust removal or over-blasting in localized areas; second, the sand material is mixed with rust chips and other impurities after use, and existing equipment lacks an effective screening and recovery structure, leading to a large amount of sand material being directly wasted and increasing production costs; third, the workpiece fixing structure lacks flexibility, making it difficult to adapt to metal workpieces of different sizes and shapes, and insecure fixing may cause the workpiece to shift during sandblasting, affecting rust removal accuracy and safety; fourth, the screening mechanism of some devices is prone to jamming due to sand material entering sliding parts, affecting the stable operation and service life of the equipment. These problems restrict the working efficiency and practicality of sandblasting rust removal equipment and urgently need improvement. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a sandblasting device for removing rust from metal surfaces.

[0005] One of the objectives of this utility model is achieved through the following technical solution: A sandblasting device for rust removal on metal surfaces includes a housing. The bottom of the inner cavity of the housing is a recycling area. A reciprocating sandblasting mechanism is provided near the top of the housing. A screening mechanism is provided in the middle of the inner cavity of the housing. Two U-shaped fixing plates are provided above the screening mechanism. Two cylinders are fixedly connected to the front and rear inner walls of the inner cavity of the housing. The output ends of two adjacent cylinders are fixedly connected to the side walls of adjacent U-shaped fixing plates.

[0006] Furthermore, the reciprocating sandblasting mechanism includes a sandblasting rigid tube, with several sandblasting nozzles fixedly connected to the bottom of the sandblasting rigid tube, and a sand guiding hose inserted into the top of the sandblasting rigid tube. A movable opening is provided in the middle of the top of the box, and the top end of the sand guiding hose penetrates the inner cavity of the movable opening. A sand storage tank is fixedly connected to the top of the box, and the other end of the sand guiding hose is inserted into the discharge port of the sand storage tank.

[0007] Furthermore, a limiting block is fixedly connected to the front side of the sandblasting hard tube. A limiting hole is opened on the limiting block, and a sliding rod passes through the inner cavity of the limiting hole. The left end of the sliding rod is fixedly connected to the left side wall of the inner cavity of the box, and the right end of the sliding rod is in contact with the right side wall of the inner cavity of the box.

[0008] Furthermore, a fixing block is fixedly connected to the rear end of the sandblasting hard tube. A threaded hole is provided on the fixing block. A threaded rod that matches the internal thread of the threaded hole passes through the inner cavity of the threaded hole and is movably connected to it. A bearing is fixedly connected to the left side wall of the housing. A servo motor is fixedly connected to the left side wall of the housing. The left end of the threaded rod passes through the inner cavity of the bearing and is fixedly connected to the power output shaft of the servo motor. The right end of the threaded rod fits against the right side wall of the inner cavity of the housing.

[0009] Furthermore, the screening mechanism includes two slids, each with a slider slidably connected to its inner cavity. A screening plate is fixedly connected between the two sliders. An elastic protective net is fixedly connected between the inner cavity of each slid and the screening plate. Cams are attached to the bottom of the inner cavity of each slid, and the tops of the two cams are attached to the bottom of the screening plate. The bottom of the screening plate is provided with a wear-resistant and smooth layer.

[0010] Furthermore, a rotating shaft passes through both cams and is fixedly connected to them. The front end of the rotating shaft is movably connected to the left side wall of the inner cavity of the front slide groove, and the rear end of the rotating shaft passes through the rear side wall of the rear slide groove and is movably connected to it. A drive motor is fixedly connected to the rear side wall of the housing, and the power output shaft of the drive motor is fixedly connected to the rear end of the rotating shaft.

[0011] Furthermore, the front and rear ends of the rotating shaft have openings in the elastic protective netting, which do not affect the normal rotation of the rotating shaft.

[0012] Furthermore, a material inlet is provided on the right side of the box, and a movable door is provided on the right side of the box. Several hinges are provided between the box and the movable door, and the box is movably connected to the movable door through several hinges.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Significantly improved sandblasting uniformity: By setting up a reciprocating sandblasting mechanism, the threaded rod is driven to rotate by a servo motor. With the threaded connection between the fixed block and the threaded hole, as well as the guide and limit of the sandblasting tube by the limit block and the slide rod, the sandblasting tube can move back and forth stably in the horizontal direction. This allows the sandblasting nozzle to evenly cover the surface of the workpiece, effectively avoiding the problem of incomplete rust removal or over-sandblasting in some areas, and greatly improving the consistency of rust removal quality.

[0014] 2. High sand recycling rate: Equipped with a special screening mechanism, the drive motor drives the cam to rotate through the shaft. The cam pushes the screening plate up and down in the chute, which can efficiently screen the used sand and separate impurities such as rust. The pure sand can be directly recycled to the recycling area at the bottom of the box for reuse, reducing sand waste and lowering production costs.

[0015] 3. Stable workpiece fixation and strong applicability: The workpiece fixing structure adopts a combination of cylinder and U-shaped fixing plate. By adjusting the extension length of the cylinder output end, the distance between the two U-shaped fixing plates can be flexibly adjusted, which can stably clamp metal workpieces of different sizes, avoid workpiece displacement during sandblasting, improve the safety and accuracy of the rust removal process, and expand the applicability of the device.

[0016] 4. Good equipment operation stability: An elastic protective net is set between the chute and the screening plate, which can effectively block sand from entering the inner cavity of the chute and avoid sand from interfering with the sliding of the slider. At the same time, the movable opening design of the rotating shaft passing through the elastic protective net does not affect its normal rotation, ensuring the smooth operation of the screening mechanism and extending the service life of the equipment.

[0017] 5. Improved ease of operation: The right side of the cabinet is equipped with a hinged door, which, together with the material handling port design, facilitates the operation of workers to pick up and put down workpieces and perform internal maintenance and cleaning, simplifying the operation process and improving work efficiency.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a perspective view of this embodiment; Figure 2 This is a schematic diagram of the component limiting block in this embodiment; Figure 3 This is a schematic diagram of the component fixing block in this embodiment; Figure 4 This is a schematic diagram of the structure of the drive motor of the component in this embodiment; Figure 5 This is a schematic diagram of the elastic protective netting structure of the component in this embodiment; Figure 6 This is a schematic diagram of the structure of the movable port of the component in this embodiment; Figure 7 This is a schematic diagram of the sand storage tank component in this embodiment; Figure 8This is a schematic diagram of the cylinder component in this embodiment; Figure 9 This is a schematic diagram of the servo motor component in this embodiment.

[0020] In the diagram: 1. Box body; 2. Sand storage tank; 3. Cylinder; 4. U-shaped fixing plate; 5. Slide groove; 6. Elastic protective net; 7. Screening plate; 8. Slide rod; 9. Limiting block; 10. Limiting hole; 11. Drive motor; 12. Rotating shaft; 13. Cam; 14. Sand guiding hose; 15. Sandblasting nozzle; 16. Threaded rod; 17. Fixing block; 18. Threaded hole; 19. Movable port; 20. Servo motor. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] The metal surface rust removal sandblasting device disclosed in this embodiment is suitable for surface rust removal treatment of small and medium-sized metal workpieces (such as steel plates, steel pipe ends, metal flanges, etc.) in machining workshops and repair workshops. It is especially suitable for repairing scrap metal workpieces with uneven rust layer thickness, and can achieve efficient rust removal and sand recycling.

[0025] Device structural details The main structure of the device in this embodiment is as follows: Figure 1-9 As shown, the specific component parameters and connection relationships are as follows: Box 1: Made of 5mm thick Q235 steel plate, with overall dimensions of 1200mm×800mm×1000mm (length×width×height). The bottom of the inner cavity is set as a 200mm deep recycling area for collecting the screened pure sand. A 400mm×600mm material outlet is opened on the right side of the box, which is connected to a movable door of the same size by 3 stainless steel hinges. Rubber sealing strips are added to the edge of the movable door to reduce sand splashing.

[0026] Reciprocating sandblasting mechanism: The sandblasting hard pipe is made of seamless steel pipe with a diameter of 50mm and a length that matches the inner width of the box (750mm). Eight sandblasting nozzles 15 with a diameter of 10mm are evenly welded to the bottom with a spacing of 100mm. The top of the sandblasting hard pipe is connected to the sand guide hose 14 (a wear-resistant rubber tube with a diameter of 50mm) through a quick connector. The top of the sand guide hose passes through the movable opening 19 (100mm×700mm) in the middle of the top of the box and is connected to the discharge port of the sand storage tank 2. The sand storage tank 2 is a vertical carbon steel tank with a capacity of 50L, which is fixed on the left side of the top of the box. A manual valve is installed at the discharge port to control the sand output.

[0027] A rectangular limiting block 9 (40mm×40mm×100mm) is welded to the front side of the sandblasted hard tube. A limiting hole 10 with a diameter of 25mm is opened in the middle of the limiting block. A sliding rod 8 (made of No. 45 steel) with a diameter of 20mm passes through the hole. The two ends of the sliding rod are welded and fixed to the left and right side walls of the inner cavity of the box, respectively. A fixing block 17 with a threaded hole 18 is welded to the rear end of the sandblasted hard tube. A threaded rod 16 with a diameter of 20mm (trapezoidal thread, pitch 5mm) is fitted in the threaded hole. The left end of the threaded rod is connected to the left side wall of the box through a bearing (model 6205), and the right end fits into the groove reserved on the right side wall of the inner cavity of the box. A servo motor 20 with a power of 750W is fixed to the outside of the left side wall of the box through a motor mount. Its power output shaft is fixed to the left end of the threaded rod through a coupling, which can drive the threaded rod to rotate forward and backward.

[0028] Workpiece fixing structure: Four cylinders 3 (model SC100×100) with a stroke of 100mm are symmetrically fixed on the front and rear inner walls of the box. Two cylinders on each side are distributed vertically. The output end is fixed to the side wall of the U-shaped fixing plate 4 (made of 8mm steel plate bent, with the opening facing inward and a 5mm thick rubber pad pasted on the inner wall for anti-slip) through the flange. The distance between the two U-shaped fixing plates can be adjusted within the range of 200-500mm by the extension and retraction of the cylinder.

[0029] Screening mechanism: A U-shaped, 30mm deep sliding groove 5 is symmetrically opened on the front and rear side walls of the inner cavity of the box. A sliding block (integrated with the screening plate) is connected to the sliding groove. The screening plate 7 is made of 5mm thick stainless steel plate with 3mm diameter screen holes (5mm hole spacing) on ​​the surface. The bottom is coated with a 0.5mm thick polytetrafluoroethylene wear-resistant smooth layer. An elastic protective net 6 (nylon material, 1mm mesh diameter) is fixed between the sliding groove and the screening plate to prevent sand from entering the sliding groove. Two cams 13 (10mm eccentricity) are attached to the bottom of the sliding groove. The cams pass through a 20mm diameter rotating shaft 12 and are welded and fixed. The front end of the rotating shaft is connected to the inner wall of the front sliding groove through a bearing, and the rear end passes through the rear sliding groove and extends to the outside of the box. It is connected to the output shaft of a 550W drive motor 11 (fixed to the rear side wall of the box) through a coupling. A suitable movable opening is opened where the rotating shaft passes through the elastic protective net to ensure that the rotation is not disturbed.

[0030] Operating procedures Workpiece clamping: Open the movable door on the right side of the box, place the workpiece to be derusted (such as a 600mm×400mm rusted steel plate) between the two U-shaped fixed plates 4, start the cylinder 3, and adjust the extension and retraction length of the cylinder output end to make the inner wall of the U-shaped fixed plate tightly fit the two sides of the workpiece. The rubber pad increases the friction to prevent the workpiece from sliding, and then close the movable door.

[0031] Sandblasting preparation: Add 0.5-1mm quartz sand to the sand storage tank 2, open the discharge port valve to allow the sand to enter the sandblasting hard pipe through the sand guide hose 14, and at the same time check whether the wiring of each power component is normal.

[0032] Reciprocating sandblasting: Start the servo motor 20 and sandblasting air source (external air compressor, air pressure adjusted to 0.6MPa). The servo motor drives the threaded rod 16 to rotate forward and backward. Through the thread transmission of the fixed block 17, the sandblasting hard tube moves horizontally back and forth along the slide rod 8 (moving speed 50mm / s). The sandblasting nozzle 15 sprays sand material at high speed onto the workpiece surface, using the impact of the sand material to remove the rust layer. The movable port 19 provides movement space for the sand guide hose to avoid the hose from twisting and getting stuck.

[0033] Sand screening and recycling: The mixture of sand and rust chips after sandblasting falls onto the screening plate 7. The drive motor 11 is started, and the motor drives the rotating shaft 12 and cam 13 to rotate (300r / min). The cam pushes the screening plate to vibrate up and down in the chute 5 (amplitude of about 20mm). The pure sand falls through the screen holes into the recycling area at the bottom of the box, while rust chips and other impurities are trapped on the surface of the screening plate. The elastic protective net 6 prevents the sand from entering the chute and avoids the slider from getting stuck.

[0034] Operation completed: After the workpiece surface has been derusted to the required standard (usually sandblasting for 3-5 minutes), turn off the servo motor, drive motor and sandblasting air source in sequence, open the movable door, and remove the workpiece by resetting it with the cylinder; periodically open the movable door to clean the impurities on the screening plate, and the sand in the recycling area can be poured back into the sand storage tank for recycling.

[0035] Implementation effect

[0036] This embodiment achieves uniform rust removal on the workpiece surface through a reciprocating sandblasting mechanism. After rust removal, the surface roughness Ra of the workpiece can reach 3.2μm, and the rust removal rate is ≥99%. The screening mechanism increases the sand recovery rate to over 85%, reducing consumable costs. The U-shaped fixing plate, in conjunction with the cylinder, can stably clamp workpieces of different sizes, and there is no displacement of the workpiece during operation. The elastic protective net effectively ensures the long-term stable operation of the screening mechanism, and the equipment can work continuously for 8 hours without jamming.

[0037] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A sand blasting device for rust removal of metal surface, comprising a box (1), the inner cavity bottom of the box (1) is a recovery area, characterized in that, The box (1) is equipped with a reciprocating sandblasting mechanism near the top. The box (1) is equipped with a screening mechanism in the middle of its inner cavity. The screening mechanism is equipped with two U-shaped fixing plates (4) above it. The inner walls of the box (1) are fixedly connected to two cylinders (3). The output ends of two adjacent cylinders (3) are fixedly connected to the side walls of the adjacent U-shaped fixing plates (4).

2. The sandblasting device for rust removal on metal surfaces according to claim 1, characterized in that: The reciprocating sandblasting mechanism includes a sandblasting hard tube, with several sandblasting nozzles (15) fixedly connected to the bottom of the sandblasting hard tube. A sand guide hose (14) is inserted into the top of the sandblasting hard tube. An movable port (19) is opened in the middle of the top of the box (1). The top of the sand guide hose (14) passes through the inner cavity of the movable port (19). A sand storage tank (2) is fixedly connected to the top of the box (1). The other end of the sand guide hose (14) is inserted into the discharge port of the sand storage tank (2).

3. The sandblasting device for rust removal on metal surfaces according to claim 2, characterized in that: A limiting block (9) is fixedly connected to the front side of the sandblasting hard pipe. A limiting hole (10) is opened on the limiting block (9). A sliding rod (8) passes through the inner cavity of the limiting hole (10). The left end of the sliding rod (8) is fixedly connected to the left side wall of the inner cavity of the box (1), and the right end of the sliding rod (8) is attached to the right side wall of the inner cavity of the box (1).

4. The sandblasting device for rust removal on metal surfaces according to claim 3, characterized in that: The rear end of the sandblasting hard tube is fixedly connected to a fixing block (17), and a threaded hole (18) is provided on the fixing block (17). A threaded rod (16) that matches the internal thread passes through the inner cavity of the threaded hole (18) and is movably connected to it. A bearing is fixedly connected to the left side wall of the box (1), and a servo motor (20) is fixedly connected to the left side wall of the box (1). The left end of the threaded rod (16) passes through the inner cavity of the bearing and is fixedly connected to the power output shaft of the servo motor (20). The right end of the threaded rod (16) is in contact with the right side wall of the inner cavity of the box (1).

5. A sandblasting device for rust removal on metal surfaces according to claim 1, characterized in that: The screening mechanism includes two slids (5), and the inner cavities of the two slids (5) are slidably connected to sliders. A screening plate (7) is fixedly connected between the two sliders. An elastic protective net (6) is fixedly connected between the inner cavities of the two slids (5) and the screening plate (7). A cam (13) is attached to the bottom of the inner cavity of the two slids (5). The top of the two cams (13) is attached to the bottom of the screening plate (7). The bottom of the screening plate (7) is provided with a wear-resistant smooth layer.

6. The sandblasting device for rust removal on metal surfaces according to claim 5, characterized in that: A rotating shaft (12) passes through both cams (13) and is fixedly connected to them. The front end of the rotating shaft (12) is movably connected to the left side wall of the inner cavity of the slide groove (5) located on the front side. The rear end of the rotating shaft (12) passes through the rear side wall of the slide groove (5) located on the rear side and is movably connected to it. The rear side wall of the housing (1) is fixedly connected to the drive motor (11). The power output shaft of the drive motor (11) is fixedly connected to the rear end of the rotating shaft (12).

7. A sandblasting device for rust removal on metal surfaces according to claim 6, characterized in that: The front and rear ends of the rotating shaft (12) pass through the movable openings on the elastic protective net (6), which does not affect the normal rotation of the rotating shaft (12).

8. A sandblasting device for rust removal on metal surfaces according to claim 1, characterized in that: The box (1) has a material inlet on its right side and a movable door on its right side. Several hinges are provided between the box (1) and the movable door, and the box (1) is movably connected to the movable door through several hinges.

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