A copper roller sandblasting device

Abstract

This invention provides a copper roller sandblasting device, belonging to the field of NdFeB thin strip production technology. The device includes a sandblasting trolley placed on one side of a copper roller, which is mounted on a copper roller stand. A cross slide is installed on the trolley, driving the spray gun to move. An electromagnet is installed on the trolley to engage with the copper roller stand. A positioning block and positioning groove are also provided on the side of the trolley opposite to the copper roller stand. The cross slide is controlled by a servo controller and can be delayed in start. This invention ensures the stability of the device and allows for delayed reciprocating motion, guaranteeing the sandblasting quality at the end of the copper roller.

Description

Technical Field

[0001] This utility model relates to neodymium iron boron thin strip production equipment, specifically to a copper roller sandblasting machine. Background Technology

[0002] Vacuum induction melting furnaces utilize the vacuum induction melting method, sealing the crucible in a vacuum chamber and using eddy current heat generated by electromagnetic induction as the heat source. Under an inert gas atmosphere, high-temperature molten steel is poured through a funnel and tundish onto copper rollers to cool and form a thin strip. In the NdFeB thin strip production process, copper roller sandblasting plays a crucial role in product quality, and the consistency of the sandblasting operation is particularly important.

[0003] Traditional sandblasting machines can be manually or automatically controlled. Manually moving the spray gun results in inconsistent sandblasting results due to the uncontrollable pressure and speed of manual movement. Automatic control uses limit switches to move the spray gun back and forth; however, the torque of ordinary motors is insufficient, leading to excessively fast spray gun speeds that affect sandblasting consistency. Furthermore, the sandblasting coverage is insufficient at the starting and reciprocating points. Additionally, the lack of fixed devices at the front and rear of the sandblasting machine causes unstable pressure between the machine and the copper roller during operation, resulting in poor sandblasting effects. Moreover, poor control of the abrasive particle ejection speed and flow rate also contributes to unsatisfactory sandblasting results. Summary of the Invention

[0004] To address the shortcomings of the aforementioned background technology, this utility model provides a novel copper roller sandblasting device. This device can automatically control the movement speed of the spray gun according to production process requirements. It can achieve delayed reciprocating motion at the starting point and return point to ensure thorough sandblasting. Simultaneously, after the sandblasting machine reaches its position, it automatically engages with the copper roller frame using an electromagnet, ensuring consistent pressure between the spray gun and the copper roller. Furthermore, it automatically monitors the amount of sand in the sand tank, and the returned sand is automatically separated from impurities and fine powder by a vibrating screen. Qualified sand particles can be recycled and reused, achieving automated control of copper roller sandblasting and ensuring sandblasting coverage and consistency.

[0005] The technical solution provided by this utility model is: a copper roller sandblasting device, including a sandblasting machine carriage, the sandblasting machine carriage being placed on one side of a copper roller, and the copper roller being mounted on a copper roller stand; The sandblasting machine trolley is equipped with a cross slide, which drives the spray gun to move, and the spray gun sprays sand towards the copper roller. An electromagnet is installed on the side of the sandblasting machine trolley opposite to the copper roller table, and the electromagnet is attracted to the copper roller table. A positioning block is also provided on the side of the sandblasting machine trolley opposite to the copper roller table, and the positioning block cooperates with the positioning groove opened on the copper roller table.

[0006] Furthermore: the cross slide is controlled by a servo controller, and a limit switch is provided at the extreme position of the cross slide. The limit switch is signal-connected to the servo controller, and a time delay relay is provided in the servo controller. When the limit switch sends a signal to the servo controller, the servo controller controls the cross slide to move after a delay.

[0007] Furthermore, the spray gun is thrust by a clamping cylinder and is close to the surface of the copper roller.

[0008] Furthermore: the rear end of the spray gun is connected to the sand inlet pipe, and the front end is provided with a sand return pipe facing the copper roller. The sand return pipe is provided with suction force by a negative pressure fan. The sand inlet pipe is connected to the bottom of the sand tank, and the sand return pipe is connected to the top of the vibrating screen. The vibrating screen is installed on the top of the sand tank.

[0009] Furthermore: the upper layer of the vibrating screen is connected to a waste sand recovery pipe, the lower layer is connected to a sand tank, and the lower layer of the vibrating screen is connected to a smoke exhaust filter, which is connected to a negative pressure fan.

[0010] Furthermore: the vibrating screen is divided into three layers. The sand return pipe is connected to the upper layer of the vibrating screen, and the upper layer is connected to the waste sand recovery pipe. The middle layer of the vibrating screen is connected to the usable recovery pipe, and the usable recovery pipe is connected to the sand tank. The lower layer of the vibrating screen is connected to the smoke exhaust filter, and the smoke exhaust filter is connected to the negative pressure fan.

[0011] Furthermore, a compressed air pipeline is also provided, which is connected to the sand inlet pipe on one side and to the sand tank on the other side.

[0012] The bottom of the sand tank is equipped with a sand inlet valve connected to the sand inlet pipe; a first solenoid valve is installed on the compressed air pipeline connected to the sand inlet pipe; and a second solenoid valve is installed on the compressed air pipeline connected to the sand tank.

[0013] Compared with the prior art, this utility model has the following advantages: the sandblasting machine carriage and the copper roller table can be automatically attracted by an electromagnet, and there is also automatic positioning at the end, which ensures the stability of the device; the sandblasting is controlled by the intelligent control of the cross slide table, which can ensure the delayed reciprocating motion at the end, thus ensuring the sandblasting quality at the end of the copper roller; the steel sand can be automatically screened to ensure online recycling, and the screening ensures the particle size and cleanliness of the steel sand. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the working principle of this device; Figure 2 This is a structural diagram of the sand feeding and return system of this device.

[0015] Reference numerals: 1-Copper roller; 2-Copper roller stand; 3-Sandblasting machine trolley; 4-Cross slide; 5-Spray gun; 6-Electromagnet; 7-Positioning block; 8-Limit switch; 9-Tightening cylinder; 10-Sand inlet pipe; 11-Sand return pipe; 12-Sand tank; 13-Sand inlet valve; 14-First solenoid valve; 15-Second solenoid valve; 16-Vibrating screen; 17-Waste sand discharge valve; 18-Smoke filter; 19-Negative pressure fan; 20-Usable recovery pipe; 21-Balancing valve. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings and embodiments. The accompanying drawings show embodiments of this utility model. However, this utility model can be implemented in various forms and is not limited to the embodiments described herein.

[0017] Reference Figure 1 As shown, this utility model provides a copper roller sandblasting device. The copper roller 1 is installed on the copper roller stand 2. The purpose of this sandblasting device is to sandblast the copper roller 1. The main structure of this sandblasting device includes: a sandblasting trolley 3, a cross slide 4, a spray gun 5, and a sand tank 12.

[0018] A cross slide 4 is installed on the sandblasting machine carriage 3. The cross slide 4 is driven by a drive mechanism. A spray gun 5 is installed on the cross slide 4. The cross slide 4 drives the spray gun 5 to move up, down, left and right.

[0019] An electromagnet 6 is installed on the side of the sandblasting machine carriage 3 opposite to the copper roller stand 2, without obstructing the movement of the cross slide 4. The electromagnet 6 can engage with the copper roller stand 2. Two positioning blocks 7 are also installed on the side of the sandblasting machine carriage 3 opposite to the copper roller stand 2. Two positioning grooves are installed on the side of the copper roller stand 2 opposite to the sandblasting machine carriage 3, which cooperate with the positioning blocks 7. When the sandblasting machine carriage 3 is pushed next to the copper roller stand 2, the left and right positions are determined by the positioning blocks 7 and the positioning grooves, and the front and back positions are determined by the engagement of the electromagnet 4 with the copper roller stand 2. This fixes the position of the sandblasting machine carriage 3, ensuring that the relative positions of the copper roller 1 and the sandblasting machine carriage 3 do not change during the sandblasting process.

[0020] The servo controller controls the movement of the cross slide 4. Limit switches 8 are set at the left, right and up and down limit positions of the cross slide 4. The limit switches 8 and the servo controller provide signal feedback to each other. When the cross slide 4 moves to the limit position, the limit switch 8 sends a signal. The servo controller is equipped with a time delay relay, which controls the cross slide 4 to move with a delay. The specific delay time can be set according to actual needs. This ensures that the cross slide 4 delays slightly in the reciprocating position, allowing the spray gun 5 to spray for a longer time, thus compensating for the insufficient sandblasting coverage at the end of the copper roller.

[0021] The spray gun 5 is connected to the clamping cylinder 9. The clamping cylinder 9 provides thrust to the spray gun 5. The spray gun 5 is in close contact with the surface of the copper roller 1 through the thrust applied by the clamping cylinder 9, ensuring the sandblasting pressure and preventing sand leakage.

[0022] Reference Figure 2 As shown, the rear end of the spray gun 5 is connected to the sand inlet pipe 10 for inputting sprayed steel grit; the front end of the spray gun 5 is provided with a return sand pipe 11 facing the surface of the copper roller 1, with the end of the return sand pipe 11 close to the surface of the copper roller 1, for recovering the steel grit reflected back from the roller surface. The recovered steel grit is drawn out by the negative pressure fan 19. Both the sand inlet pipe 10 and the return sand pipe 11 are associated with the sand tank 12. The bottom of the sand tank 12 is connected to the sand inlet pipe 10, and the other end of the sand inlet pipe 10 is connected to the rear end of the spray gun 5; the top of the sand tank 12 is connected to the return sand pipe 11, and the other end of the return sand pipe 11 is connected to the front end of the spray gun 5.

[0023] Furthermore, a sand inlet valve 13 is installed at the bottom of the sand tank 12 and connected to the sand inlet pipe 10 to control the amount of sand fed in.

[0024] Furthermore, the sand tank 12 is propelled with sand by compressed air. One side of the compressed air pipeline is connected to the sand inlet pipe 10 to directly push steel shot (also called bullet). A first solenoid valve 14 is installed on this compressed air pipeline to control the air intake. The other side of the compressed air pipeline is connected to the sand tank 12 to also apply a pushing force to the steel shot in the tank. A second solenoid valve 15 is installed on this compressed air pipeline to control the air intake.

[0025] Furthermore, this device implements a screening and reuse function for the steel sand recovered from the surface of the copper roller 1. A vibrating screen 16 is installed at the top of the sand tank 12, and a sand return pipe 11 is connected to the top of the vibrating screen 16. A waste sand recovery pipe is connected to the upper layer of the vibrating screen 16, and a waste sand discharge valve 17 is installed on the waste sand recovery pipe. Large particles of steel sand are discharged through the waste sand discharge valve 17. The steel sand in the lower layer of the vibrating screen 16 enters the sand tank 12 for reuse, and a smoke filter 18 is connected to the lower cavity of the vibrating screen 16. One end of the smoke filter 18 is connected to a negative pressure fan 19. The smoke filter 18 can absorb fine particles in the lower cavity of the vibrating screen 16 and discharge them, ensuring the uniformity of the particle size of the usable steel sand.

[0026] Furthermore, this device uses a three-layer vibrating screen, which sequentially screens out particles from largest to smallest from top to bottom. The upper layer recovers large steel grit particles, which are then discharged through a waste sand recovery pipe. The middle layer is connected to a usable recovery pipe 20, which in turn connects to a sand tank 12 for recycling. The lower layer is connected to a fume filter 18, which recovers fine particles. This measure further ensures that the usable steel grit has a uniform particle size and is clean.

[0027] Furthermore, a pressure balancing pipe is installed between the top cavity and the lower shot cavity of the sand tank 12. A pressure balancing valve 21 is installed on the pressure balancing pipe to balance the pressure between the upper and lower cavities, so that the steel shot flows smoothly downwards. This prevents the steel shot from being pushed forward too quickly due to the high pressure in the upper cavity, and also prevents the steel shot from being backflushed due to the high pressure in the lower cavity.

[0028] Traditional steel shot recycling involves draining all the steel shot from the sand jar, then sieving it through sieves of different mesh sizes for reuse, or using a vibrating screen. This invention integrates a vibrating screen onto the sand jar, enabling online sorting and reuse of steel shot, reducing manual labor intensity and improving production efficiency.

[0029] The working process of this device is as follows: by controlling the sand inlet valve 13 and the first solenoid valve 14 to open, compressed air is used to blow steel sand from the sand inlet pipe 10 into the spray gun 5. The steel sand is sprayed at high speed onto the surface of the copper roller through the spray gun 5. The surface of the copper roller undergoes plastic deformation under the impact of the steel sand (shot) flow, forming a dense array of small pits. Since the steel sand flow has a cutting effect on the surface of the water-cooled roller, the surface can be cleaned by sandblasting, and good surface roughness (Ra, Rz) can be obtained, thereby obtaining an alloy sheet with a good microstructure.

[0030] The steel shot sprayed onto the surface of the copper roller is drawn into the three-layer vibrating screen by the negative pressure fan 19 through the sand return pipe 11. The vibrating screen separates the steel shot by vibration. Large particles are discharged through the waste sand discharge valve 17, while fine powder is drawn into the smoke filter 18 by the fan and discharged after filtration. Recyclable steel shot is returned to the sand tank for reuse through the usable recovery pipe 20.

[0031] During this period, the servo controller sets the running speed, running length, and reciprocating delay pause time according to the production process requirements, the level gauge controls the material level height, and the electromagnet automatically engages and fixes itself after the sandblasting machine is in position. The sandblasting operation process is automatically controlled to ensure the consistency and coverage of the copper roller sandblasting effect.

[0032] It should be noted that structures not described in this utility model are identical to or can be implemented using existing technology, as they do not involve the design points or improvement directions of this utility model, and will not be elaborated upon here. The above embodiments only illustrate certain implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A copper roller sandblasting device, characterized in that: Including the sandblasting machine trolley (3). The sandblasting machine trolley (3) is placed on one side of the copper roller (1), and the copper roller (1) is mounted on the copper roller stand (2); The sandblasting machine trolley (3) is equipped with a cross slide (4), which drives the spray gun (5) to move and sprays sand towards the copper roller (1). An electromagnet (6) is provided on the side of the sandblasting machine trolley (3) opposite to the copper roller stand (2), and the electromagnet (6) is attracted to the copper roller stand (2). A positioning block (7) is also provided on the side of the sandblasting machine trolley (3) opposite to the copper roller table (2), and the positioning block (7) cooperates with the positioning groove opened on the copper roller table (2).

2. The copper roller sandblasting device according to claim 1, characterized in that: The cross slide (4) is controlled by a servo controller. The movement limit position of the cross slide (4) is provided with a limit switch (8). The limit switch (8) is connected to the servo controller. The servo controller is provided with a time delay relay. When the limit switch (8) sends a signal to the servo controller, the servo controller controls the cross slide (4) to move after a delay.

3. The copper roller sandblasting device according to claim 1, characterized in that: The spray gun (5) is thrust by a clamping cylinder (9) and is close to the surface of the copper roller (1).

4. The copper roller sandblasting device according to claim 1, characterized in that: The spray gun (5) is connected to the sand inlet pipe (10) at the rear end and the sand return pipe (11) is set at the front end facing the copper roller (1). The sand return pipe (11) is provided with suction force by the negative pressure fan (19). The sand inlet pipe (10) is connected to the bottom of the sand tank (12), and the sand return pipe (11) is connected to the top of the vibrating screen (16), which is installed on the top of the sand tank (12).

5. The copper roller sandblasting device according to claim 4, characterized in that: The upper layer of the vibrating screen (16) is connected to the waste sand recovery pipe, the lower layer is connected to the sand tank (12), and the lower layer of the vibrating screen (16) is connected to the smoke filter (18), and the smoke filter (18) is connected to the negative pressure fan (19).

6. The copper roller sandblasting device according to claim 4, characterized in that: The vibrating screen (16) is divided into three layers. The return sand pipe (11) is connected to the upper layer of the vibrating screen (16), and the upper layer is connected to the waste sand recovery pipe. The middle layer of the vibrating screen (16) is connected to the usable recovery pipe (20), and the usable recovery pipe (20) is connected to the sand tank (12). The lower layer of the vibrating screen (16) is connected to the smoke filter (18), and the smoke filter (18) is connected to the negative pressure fan (19).

7. The copper roller sandblasting device according to claim 4, characterized in that: It is also equipped with a compressed air pipeline, which is connected to the sand inlet pipe (10) on one side and to the sand tank (12) on the other side.

8. The copper roller sandblasting device according to claim 7, characterized in that: The bottom of the sand jar (12) is provided with a sand inlet valve (13) connected to the sand inlet pipe (10); A first solenoid valve (14) is provided on the compressed air pipeline connected to the sand inlet pipe (10); a second solenoid valve (15) is provided on the compressed air pipeline connected to the sand tank (12).

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