A process for composite grinding and cleaning of the inner wall of a container

Abstract

The application discloses a container inner wall composite grinding and cleaning treatment process, which comprises the following steps: (1) rough grinding treatment, (2) discharge cleaning, (3) fine grinding treatment, (4) secondary discharge cleaning, (5) primary deionized water cleaning treatment, (6) isopropanol cleaning treatment, (7) secondary deionized water flushing, (8) hot nitrogen drying and (9) inner wall detection. When the grinding treatment is carried out in steps (1) and (3), the oil cylinder telescopic action drives the grinding frame to tilt and swing. The application solves the problem that the grinding at the bottle shoulder cannot reach the position, abrasive forms turbulent motion in the container, and effectively solves the problem of single rotation of traditional grinding.

Description

Technical Field

[0001] This invention designs a grinding and cleaning process, specifically, a composite grinding and cleaning process for the inner wall of a container. Background Technology

[0002] Chip manufacturing requires ultrapure gases (such as sulfur hexafluoride and neon), and the challenges in storing ultrapure gases need to be addressed across the industry chain. Due to the requirements for ultrapure gases, their storage containers have extremely high requirements, and the smoothness of the inner wall of the storage container is a crucial indicator of whether the container meets these requirements.

[0003] In existing technologies, such as Figure 1 Traditional mechanical grinding processes often use a single abrasive 21 (such as silicon carbide). The container 2 is typically placed horizontally on a grinding frame 1, and the grinding frame 1 rotates the container 2 along its axis. Grinding is performed at a fixed speed, followed by internal degreasing using chemical solvents. However, the methods of chemical cleaning and hot air drying after grinding have the following drawbacks: (1) the abrasive is singular, resulting in poor surface grinding; traditional mechanical grinding also results in surface micro-cracks, making it impossible to control roughness and roundness; (2) traditional water washing cannot completely remove abrasive debris and grease, leaving surface chemical solvent residues and surface micro-water residues, which affect gas purity; (3) incomplete drying leads to oxidation and corrosion. Based on the above, this invention proposes a composite grinding and cleaning process for the inner wall of a container. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a composite grinding and cleaning process for the inner wall of a container, which solves the problems of inadequate grinding of the inner wall of the container, inconsistent distribution of cutting force, and excessively rough grinding in the prior art.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A composite grinding and cleaning process for the inner wall of a container includes the following steps: (1) Coarse grinding treatment: A pre-set grinding frame is provided with a support base at the bottom of the grinding frame. A connecting rod is provided between the support base and the grinding frame. The lower end of the connecting rod is fixedly connected to the support base, and the upper end of the connecting rod is connected to the grinding frame through a rotating shaft. An inclined oil cylinder is connected between the support base and the grinding frame. The coarse grinding material and grinding liquid are placed in a container, and the container is placed on the grinding frame. The grinding frame drives the container to rotate for grinding treatment. At the same time, the extension and retraction of the oil cylinder drives the grinding frame to tilt and swing. The swing angle of the grinding frame is 8~30°, and the swing time is 20~50s. (2) Discharge and cleaning: The container is placed on the cleaning rack to discharge the abrasive and grinding liquid for recycling. Then the container is connected to the cleaning water to rinse the inner wall of the container and wash out the coarse abrasive and grinding liquid remaining on the inner wall. (3) Fine grinding treatment: The fine grinding material and grinding liquid are put into the container, the grinding frame drives the container to rotate, and the grinding is carried out. At the same time, the oil cylinder extends and retracts, causing the grinding frame to tilt and swing. The angle of the grinding frame to swing is 8~30°, and the swing time is 20~50s. (4) Secondary discharge cleaning: The container is hoisted and fixed on the cleaning rack, and the fine grinding material and grinding liquid are discharged for recycling. Then the container is connected to the cleaning water to rinse the inner wall of the container and wash out the fine grinding material and grinding liquid remaining on the inner wall. (5) First deionized water cleaning treatment: The container is connected to deionized water to rinse away the residual fine grinding liquid and abrasive on the inner wall; (6) Isopropanol cleaning treatment: Connect the isopropanol cleaning pipeline nozzle to the container to clean the inner wall to remove oil and grease. After cleaning, remove the isopropanol cleaning pipeline nozzle. (7) Secondary deionized water rinsing: The container is connected to deionized water and the inner wall of the container is rinsed; (8) Hot nitrogen drying: Introduce hot nitrogen into the container to heat and dry the inner wall of the container evenly; (9) Inner wall inspection: Place the cleaning rack horizontally. Inspect the grease on the inner wall of the container, and then perform particulate matter inspection. If both the grease and particulate matter inspections are qualified, the grinding and processing process is qualified. If at least one inspection fails, repeat steps (1) to (9) until the inspection is qualified.

[0006] Furthermore, in the above-mentioned composite grinding and cleaning process of the inner wall of the container, in step (1) above, the coarse grinding abrasive is brown fused alumina, the total amount of brown fused alumina abrasive accounts for 20%~60% of the container volume, the coarse grinding liquid includes coarse grinding stock liquid and rust-preventive water, the coarse grinding stock liquid and rust-preventive water are mixed in the ratio of (1~2):(3~5), the coarse grinding liquid accounts for 2%~10% of the total amount of brown fused alumina abrasive, when grinding, the grinding parameters are set: grinding time 10~15H, grinding frequency 30~70HZ, the container is hoisted onto the grinding frame for grinding, the lifting and swinging angle is 8~30°, the single swing time is 20~50, through the cooperation of the grinding frame and the oil cylinder, the container can form a turbulent grinding effect inside during grinding, effectively solving the problem of the single rotation of traditional grinding.

[0007] Furthermore, in the above-mentioned composite grinding and cleaning process of the inner wall of the container, in step (2) above, after the coarse grinding is completed, the container is horizontally suspended and fixed on the cleaning rack. First, open the tooling valves at both ends, flip the cleaning rack to a vertical state, and then raise the cleaning rack to discharge the coarse grinding material and grinding liquid from the bottom of the container for recycling. After all the material is discharged, the tooling valve at the top of the container is connected to the connecting pipe. The lower end of the connecting pipe is connected to a nozzle, which can spray the inner wall of the container. The connecting pipe is connected to high-pressure tap water. The tap water flushing pressure is 10~20MPA. The connecting pipe moves up and down and back and forth to clean the inner wall of the container. The tap water moves up and down to flush the inner wall of the container 1~8 times. The nozzle performs a 360° all-round flushing structure to flush out the residual abrasive and grinding liquid on the inner wall and improve the fine grinding efficiency.

[0008] Further, in the above-mentioned composite grinding and cleaning process of the inner wall of the container, in step (3), the fine grinding abrasive is brown high-frequency ceramic, the total amount of high-frequency ceramic accounts for 20%~60% of the container volume, the fine grinding liquid includes cleaning agent, brightener and deionized water, the cleaning agent, brightener and deionized water are mixed in the ratio of (1~2):(1~2):(3~5), the fine grinding liquid accounts for 3~8% of the total amount of high-frequency ceramic, first close the discharge port tool valve, then put the fine grinding abrasive and grinding liquid into the container and close the inlet tool valve to prevent the abrasive from leaking out, set the grinding parameters: grinding time 10~15H, grinding frequency 30~70HZ, hoist the container onto the grinding frame for grinding, the lifting swing angle is 8~30°, the single swing time is 20~50s, to avoid insufficient single grinding accuracy leading to multiple rework.

[0009] Furthermore, in the above-mentioned composite grinding and cleaning process for the inner wall of the container, in step (5), the connecting pipe is connected to deionized water, the temperature of the deionized water is 60~90℃, the resistivity of the deionized water is 10~20MΩ, the rinsing pressure is 10~20MPA, and the connecting pipe moves up and down to rinse the inner wall of the container. The number of times the pipe moves up and down to rinse is 1~8 times, rinsing away the residual abrasive and grinding fluid on the inner wall.

[0010] Furthermore, in the above-mentioned composite grinding and cleaning process of the inner wall of the container, in step (8), the nitrogen pipe connector is connected to the tooling valve at the bottom of the container, and heated nitrogen is blown into the container. The nitrogen purging pressure is 2~5MPA, the drying temperature is 150~300℃, and the drying time is 10~60 minutes, so that the inner wall is uniformly heated and dried. The inert properties of nitrogen prevent the surface from rusting.

[0011] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: (1) In the coarse grinding process of the present invention, the rhomboid brown fused alumina abrasive and the grinding liquid are mixed and used. The physical grinding of the brown fused alumina abrasive and the chemical auxiliary effect of the grinding liquid work synergistically to enhance the cutting force on the metal surface. The liquid medium of the grinding liquid reduces the excessive wear of abrasive particles and maintains the sharpness and continuous grinding ability of the brown fused alumina. The rust-preventing water can prevent the metal from oxidizing during the grinding process. In the fine grinding process, cylindrical high-frequency ceramic, brightener, cleaning agent and deionized water are used. The cylindrical high-frequency ceramic can efficiently remove burrs, oxide layer and uneven parts on the surface of the container. The brightener contains alkaline components, which can neutralize acid residues and reduce the risk of metal being corroded by acid. The cleaning agent dissolves grease, dirt and residual oxide layer. The high-frequency ceramic physical grinding further removes fine scratches, burrs and uneven areas on the surface. The combination can accelerate the formation of high gloss and reduce the traditional multi-step grinding process. (2) During the coarse grinding and fine grinding processes, the grinding frame and the oil cylinder work together. The oil cylinder is controlled by the frequency converter so that the container tilts when it rotates on the grinding frame, so that the abrasive and grinding liquid are fully mixed and evenly covered on the inner wall of the container. This solves the problem of incomplete grinding inside the container and at the shoulder of the bottle, avoids local accumulation or empty grinding, and ensures consistent cutting force distribution. The abrasive forms turbulent motion inside the container. The disordered flow of turbulence combined with the regular movement of the grinding frame can periodically change the contact angle between the abrasive and the inner wall, effectively solving the problem of the single rotation of traditional grinding, reducing the risk of scratches caused by friction in one direction, and improving the surface finish. The tooling valve can prevent the risk of the container falling during tilting and rotation. (2) This invention employs a first-stage deionized water cleaning, isopropanol cleaning, and a second-stage deionized water cleaning, which solves the problem of surface particulate residue. Isopropanol cleaning replaces chemical toxic solvent cleaning, achieving zero chemical pollution. Hot nitrogen drying is used to avoid the problems of surface corrosion and pollution caused by traditional steam drying. Attached Figure Description

[0012] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings: Figure 1 This is a schematic diagram of grinding the inner wall of a container using existing technology. Figure 2 This is a flow chart of the composite grinding and cleaning process for the inner wall of the container according to the present invention; Figure 3 This is a schematic diagram illustrating the grinding process of the container; Figure 4 This is a schematic diagram of the grinding equipment in operation; Figure 5 This is a schematic diagram illustrating the cleaning process for a container; Figure 6 This is a schematic diagram of the container drying process.

[0013] The attached diagram lists the components represented by each number as follows: 1. Grinding frame; 2. Container; 21. Abrasive; 3. Support base; 31. Hydraulic cylinder; 32. Connecting rod; 4. Tooling valve; 5. Cleaning frame; 6. Connecting pipe; 7. Nitrogen pipe. Detailed Implementation

[0014] The invention will now be described in further detail with reference to the accompanying drawings.

[0015] like Figure 2 As shown, this invention provides a composite grinding and cleaning process for the inner wall of a container, including the following steps: (1) coarse grinding treatment: as shown in the figure. Figure 3 and Figure 4 As shown, a pre-set grinding frame 1 is provided. The bottom of the grinding frame 1 is provided with a support base 3. A connecting rod 32 is provided between the support base 3 and the grinding frame 1. The lower end of the connecting rod 32 is fixedly connected to the support base 3. The upper end of the connecting rod 32 is connected to the grinding frame 1 through a rotating shaft. An inclined oil cylinder 31 is connected between the support base 3 and the grinding frame 1. The coarse grinding material and grinding liquid are placed in a container. The container 2 is placed on the grinding frame 1. The grinding frame 1 drives the container 2 to rotate for grinding. At the same time, under the extension and retraction of the oil cylinder 31, the grinding frame 1 makes a seesaw-like lifting and swinging motion. The swing angle from the lowest point to the highest point of the grinding frame 1 is 8~30 degrees, and the single swing time is 20~50s. (2) Discharge and cleaning: After the coarse grinding is completed, the container is hoisted and fixed on the cleaning frame 5. The abrasive material and grinding liquid are discharged for recycling. Then the container tool valve is connected to the cleaning water to rinse the inner wall of the container and wash out the coarse grinding material and grinding liquid remaining on the inner wall. (3) Fine grinding treatment: such as Figure 3 and Figure 4 As shown, after cleaning, close the discharge port valve, put the fine grinding material and grinding liquid into the container and close the tooling valve 4 to prevent the grinding material from leaking out. The grinding frame 1 drives the container 2 to rotate and perform grinding. At the same time, under the extension and retraction of the oil cylinder 31, the grinding frame 1 makes a seesaw-like swinging motion. The swing angle from the lowest point to the highest point of the grinding frame 1 is 8~30 degrees, and the single swing time is 20~50s. (4) Secondary discharge cleaning: as shown Figure 5 As shown, after fine grinding, the container is hoisted and fixed on the cleaning rack 5, and the fine grinding material and grinding liquid are discharged for recycling. Then, the container tooling valve 4 is connected to the cleaning water to rinse the inner wall of the container, and the fine grinding material and grinding liquid remaining on the inner wall are washed out; (5) First deionized water cleaning treatment: as shown Figure 5As shown, deionized water is connected to the tooling valve 4 at the top of the container to rinse away the residual fine grinding liquid and abrasive on the inner wall; (6) Isopropyl alcohol cleaning treatment: the isopropyl alcohol cleaning pipeline nozzle is connected to the tooling valve 4 of the container, and the nozzle is adjusted so that the sprayed isopropyl alcohol is atomized and covers the entire inner wall surface to start the inner wall cleaning for degreasing. After cleaning, the isopropyl alcohol cleaning pipeline nozzle is removed; (7) Secondary deionized water rinsing: as shown Figure 5 As shown, the tooling valve 4 at the top of container 2 is connected to deionized water through the connecting pipe 6 to rinse the inner wall of the container to prevent particulate matter from adhering to the inner wall and causing floating rust; after rinsing, the connecting pipe 6 is removed; (8) Hot nitrogen drying: hot nitrogen is introduced into the container to heat and dry the inner wall of the container evenly; (9) Inner wall inspection: after the nitrogen drying is completed, the nitrogen pipe joint is removed, the cleaning rack 5 is placed horizontally, the tooling valves at both ends are removed to inspect the inner wall for grease, and after inspection, the process end plug is installed to inspect for particulate matter; if both the grease and particulate matter inspections are qualified, the grinding and processing process is qualified; if at least one inspection is unqualified, steps (1) to (9) are repeated until the inspection is qualified.

[0016] Preferably, in step (1) above, the coarse grinding abrasive is brown fused alumina, the total amount of brown fused alumina abrasive accounts for 20% to 60% of the container volume, the coarse grinding liquid includes coarse grinding stock solution and rust-preventive water, the coarse grinding stock solution and rust-preventive water are mixed in a ratio of (1 to 2): (3 to 5), the coarse grinding liquid accounts for 2% to 10% of the total amount of brown fused alumina abrasive, when grinding, the grinding parameters are set as follows: grinding time 10 to 15 hours, grinding frequency 30 to 70 Hz, the container 2 is hoisted onto the grinding frame 1 for grinding, the lifting and swinging angle is 8 to 30 degrees, and the single swinging time is 20 to 50 seconds.

[0017] Preferably, in step (2) above, after coarse grinding, the container is horizontally suspended and fixed on the cleaning rack 5. First, open the tooling valves at both ends, flip the cleaning rack 5 to a vertical state, and then raise the cleaning rack 5 to discharge the coarse grinding material and grinding liquid from the bottom of the container 2 for recycling. After all the material is discharged, the tooling valve at the top of the container is connected to the connecting pipe 6. The lower end of the connecting pipe 6 is connected to a nozzle, which can spray the inner wall of the container. The connecting pipe 6 is connected to high-pressure tap water, and the tap water flushing pressure is 10~20MPA. The connecting pipe 6 moves up and down and back and forth to clean the inner wall of the container. The tap water moves up and down to flush the inner wall of the container 1~8 times.

[0018] In step (3), the fine grinding abrasive is brown high-frequency ceramic, and the total amount of high-frequency ceramic accounts for 20% to 60% of the container volume. The fine grinding liquid includes cleaning agent, brightener and deionized water. The cleaning agent, brightener and deionized water are mixed in the ratio of (1~2):(1~2):(3~5). The fine grinding liquid accounts for 3~8% of the total amount of high-frequency ceramic. First, close the discharge port tool valve, and then put the fine grinding abrasive and grinding liquid into the container and close the inlet tool valve to prevent the abrasive from leaking out. Set the grinding parameters: grinding time 10~15H, grinding frequency 30~70HZ. Hoist the container 2 onto the grinding frame 1 for grinding. The lifting and swinging angle is 8~30 degrees and the single swing time is 20~50s.

[0019] like Figure 5 As shown, in step (4), after the fine grinding process is completed, the container is horizontally suspended and fixed on the cleaning rack 5. First, open the tooling valves at both ends, flip the cleaning rack 5 to a vertical state, and then raise the cleaning rack 5 to discharge the fine grinding material and grinding liquid from the bottom of the container for recycling. After all the material is discharged, the tooling valve at the top of the container 2 is connected to the connecting pipe 6. The lower end of the connecting pipe 6 is connected to a nozzle, which can spray the inner wall of the container. The upper end of the connecting pipe 6 is connected to high-pressure tap water. The flushing pressure is adjusted to 10~20MPA. The flushing stroke is set according to the total length of the container. The connecting pipe 6 moves up and down and back and forth to flush the inner wall of the container 1~8 times, and the residual abrasive and grinding liquid on the inner wall are flushed out.

[0020] In step (5), the connecting pipe 6 is connected to deionized water. The temperature of the deionized water is 60~90℃, the resistivity of the deionized water is 10~20MΩ, the flushing pressure is 10~20MPA, and the connecting pipe 6 moves up and down to flush the inner wall of the container. The number of times the pipe moves up and down to flush is 1~8 times, so as to flush away the abrasive and grinding fluid remaining on the inner wall.

[0021] In step (6), the isopropanol cleaning pressure is 0.3~0.8MPA. The isopropanol cleaning pipeline nozzle is adjusted so that the sprayed isopropanol is atomized and covers the entire inner wall surface. The amount used is 1.5~3 liters per minute. The rinsing stroke is set according to the total length of the container. The isopropanol cleaning pipeline nozzle moves up and down and back and forth to start cleaning the inner wall to remove oil and grease. After cleaning, the isopropanol cleaning pipeline nozzle is removed.

[0022] In step (7), deionized water is connected to the top of container 2 through connecting pipe 6. The temperature of deionized water is set to 60~90℃, the resistivity of deionized water is 12~20MΩ, the rinsing pressure is 10~20MPA, and the connecting pipe 6 moves up and down to rinse the inner wall of the container. The number of rinsing times is 1~8 times to prevent particulate matter from adhering to the inner wall and causing floating rust. After rinsing, the rinsing hose is taken out.

[0023] In step (8), the nitrogen pipe connector is connected to the tooling valve at the bottom of the container, and heated nitrogen is blown into the container. The nitrogen purging pressure is 2~5MPA, the drying temperature is 150~300℃, and the drying time is 10~60 minutes. Example 1

[0024] Rough grinding treatment: The total amount of 12mm×12mm rhomboid brown fused alumina abrasive is 40% of the container volume. The coarse grinding fluid and neutral rust inhibitor are mixed at a ratio of 1:4. 7% of the total amount of brown fused alumina abrasive is loaded into the container and the tooling valve is closed to prevent abrasive leakage. The grinding parameters are set as follows: grinding time 12 hours, grinding frequency 50 Hz, grinding frame 1 lifting and swinging angle 5%, and swinging time 30 seconds / cycle. Discharge and cleaning: After coarse grinding, Container 2 is hoisted and fixed on Cleaning Frame 5. First, open the tooling valves at both ends, then flip and vertically raise Cleaning Frame 5 to discharge the brown corundum and grinding fluid for recycling. After all is discharged, connect the tooling valve at the top of the container to tap water and adjust the flushing pressure to 15MPa. Use Connecting Pipe 6 to lift and flush the inner wall of the container once. Select a 360° all-round flushing structure for the flushing pipe nozzle to flush out the abrasive and grinding fluid remaining on the inner wall. Fine grinding process: Close the discharge port tooling valve, add 6mm×21mm cylindrical high-frequency ceramic abrasive, the total amount of which is 45% of the container volume, cleaning agent, brightener, deionized water in a 1:1:4 ratio, and add 5% of the total amount of high-frequency ceramic into the container and close the tooling valve to prevent abrasive leakage. Set the grinding parameters: grinding time 12 hours, grinding frequency 50 Hz, grinding frame 1 lifting and swinging angle 5%, swinging time 30 seconds / cycle; Secondary discharge cleaning: Hoist container 2 onto cleaning frame 5 and fix it. First, open the tooling valves at both ends and then raise cleaning frame 5 vertically to discharge the abrasive and grinding liquid for recycling. After all the material is discharged, connect the tooling valve at the top of the container to tap water through connecting pipe 6. Adjust the flushing pressure to 15MPa. Set the flushing stroke according to the total length of the container. Connect tap water and raise and lower connecting pipe 6 to flush the inner wall of the container once to flush out the abrasive and grinding liquid remaining on the inner wall. One-time deionized water cleaning: Switch tap water to deionized water, set the process parameters: deionized water temperature 80℃, deionized water resistivity 15MΩ, flushing pressure 15MPA, connecting pipe 6 lifting and lowering flushing 6 times, to flush away the residual grinding fluid and abrasive on the inner wall, and remove the flushing nozzle after flushing. Isopropyl alcohol cleaning: Connect the isopropyl alcohol cleaning pipeline nozzle to the tooling valve 4 on the top of container 2. Set the process parameters: cleaning pressure 0.5MPA. Adjust the nozzle to make the sprayed isopropyl alcohol atomized and cover the entire inner wall surface. The dosage is 2 liters per minute. Set the rinsing stroke according to the total length of the container. The isopropyl alcohol cleaning pipeline nozzle rises and falls to clean the inner wall of the container. Start the inner wall cleaning to remove oil and grease. After cleaning, remove the isopropyl alcohol cleaning pipeline nozzle. Secondary deionized water cleaning: The tooling valve on the top of the container is connected to deionized water through the connecting pipe 6. Set the process parameters: deionized water temperature 80℃, deionized water resistivity 15MΩ, rinsing pressure 15MPA, and the connecting pipe 6 is raised and lowered twice for rinsing. After rinsing, remove the connecting pipe 6. Hot nitrogen drying: Connect and fix the nitrogen tube blowing connector to the tooling below the bottle mouth, and set the drying parameters: nitrogen purging pressure 3MPa, drying temperature 200℃, drying time 15 minutes to make the inner wall evenly heated and dried. Inner wall inspection: After nitrogen drying is completed, remove the nitrogen pipe blowing joint, place the cleaning rack 5 horizontally, remove the tooling valves at both ends to inspect the inner wall for grease, and then install the process end plug for particulate matter inspection. Example 2

[0025] The difference between this embodiment and Embodiment 1 is that in the coarse grinding process of step (1), water and rust inhibitor are mixed in proportion to form a 7% rust-preventive solution, and the grinding stock solution and rust-preventive solution are mixed in a ratio of 1:3. The dosage is added according to the abrasive, the proportioned grinding fluid, and the container volume in a ratio of 20:1:100. In the fine grinding process of step (2), brightener, cleaning agent, and deionized water are mixed in a ratio of 1:1:4, and the dosage is added according to the abrasive, the proportioned grinding fluid, and the container volume in a ratio of 20:1:90.

[0026] As described above, the coarse grinding process of this invention utilizes a mixture of rhomboid brown fused alumina abrasive and grinding fluid. The physical grinding action of the brown fused alumina abrasive and the chemical assistance of the grinding fluid work synergistically to enhance the cutting force on the metal surface. The liquid medium of the grinding fluid reduces the rapid wear of abrasive particles, maintaining the sharpness and continuous grinding ability of the brown fused alumina. Rust-preventing water prevents metal oxidation during the grinding process. The fine grinding process employs cylindrical high-frequency ceramic, brightener, cleaning agent, and deionized water. The cylindrical high-frequency ceramic efficiently removes burrs, oxide layers, and uneven areas from the container surface. The brightener contains alkaline components, which neutralize acidic residues and reduce the risk of metal corrosion by acid. The cleaning agent dissolves grease, dirt, and residual oxide layers, while the high-frequency ceramic further removes fine scratches, burrs, and uneven areas through physical grinding. This combined use accelerates the formation of a high-gloss finish and reduces the need for traditional multi-step grinding processes.

[0027] During the coarse and fine grinding processes, the grinding frame 1 and the hydraulic cylinder 31 work together. The hydraulic cylinder 31 is controlled by a frequency converter, which makes the container tilt and swing when it rotates on the grinding frame 1. This allows the abrasive and grinding fluid to be fully mixed and evenly cover the inner wall of the container, solving the problem of incomplete grinding inside the container and at the shoulder of the bottle. It avoids local accumulation or empty grinding and ensures consistent cutting force distribution. The abrasive forms turbulent motion inside the container. The disordered flow of turbulence combined with the regular movement of the grinding frame can periodically change the contact angle between the abrasive and the inner wall, effectively solving the problem of the single rotation of traditional grinding, reducing the risk of scratches caused by friction in one direction, and improving surface finish. The tooling valve can prevent the container from falling during tilting and rotation.

[0028] This invention employs a first-stage deionized water cleaning, isopropanol cleaning, and a second-stage deionized water cleaning to solve the problem of surface particulate residue. Isopropanol cleaning replaces toxic chemical solvents, achieving zero chemical pollution. Hot nitrogen drying avoids the surface corrosion and contamination problems associated with traditional steam drying.

[0029] It should be understood that structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention. Technical aspects, shapes, and structures not described in detail in this invention are all prior art.

Claims

1. A process for the in-situ composite polishing and cleaning of the interior walls of a vessel, characterized in that, Includes the following steps: (1) Coarse grinding treatment: A pre-set grinding frame is provided with a support base at the bottom of the grinding frame. A connecting rod is provided between the support base and the grinding frame. The lower end of the connecting rod is fixedly connected to the support base, and the upper end of the connecting rod is connected to the grinding frame through a rotating shaft. An inclined oil cylinder is connected between the support base and the grinding frame. The coarse grinding abrasive and coarse grinding liquid are placed in a container. The container is placed on the grinding frame. The grinding frame drives the container to rotate for grinding treatment. At the same time, the oil cylinder extends and retracts, causing the grinding frame to tilt and swing. The swing angle of the grinding frame is 8~30°, and the swing time is 20~50s. The coarse grinding abrasive is brown fused alumina. The total amount of brown fused alumina accounts for 20%~60% of the container volume. The coarse grinding liquid includes coarse grinding stock solution and rust-preventive water. The coarse grinding stock solution and rust-preventive water are mixed in a ratio of (1~2):(3~5). The coarse grinding liquid accounts for 2%~10% of the total amount of brown fused alumina. When grinding, the grinding time is 10~15H and the grinding frequency is 30~70Hz. (2) Discharge and cleaning: The container is placed on the cleaning rack to discharge the abrasive and grinding liquid for recycling. Then the container is connected to the cleaning water to rinse the inner wall of the container and wash out the coarse abrasive and grinding liquid remaining on the inner wall. (3) Fine grinding treatment: The fine grinding abrasive and fine grinding liquid are loaded into the container. The grinding frame drives the container to rotate and grind. At the same time, the oil cylinder extends and retracts, causing the grinding frame to tilt and swing. The swing angle of the grinding frame is 8~30° and the swing time is 20~50s. The fine grinding abrasive is high-frequency ceramic, and the total amount of high-frequency ceramic accounts for 20%~60% of the container volume. The fine grinding liquid includes cleaning agent, brightener and deionized water. The cleaning agent, brightener and deionized water are mixed in the ratio of (1~2):(1~2):(3~5). The fine grinding liquid accounts for 3~8% of the total amount of high-frequency ceramic. First, close the discharge port tool valve, and then load the fine grinding abrasive and fine grinding liquid into the container and close the inlet tool valve to prevent the abrasive from leaking out. The grinding time is 10~15H and the grinding frequency is 30~70Hz. (4) Secondary discharge cleaning: The container is hoisted and fixed on the cleaning rack, and the fine grinding material and grinding liquid are discharged for recycling. Then the container is connected to the cleaning water to rinse the inner wall of the container and wash out the fine grinding material and grinding liquid remaining on the inner wall. (5) First deionized water cleaning treatment: The container is connected to deionized water to rinse away the fine grinding liquid and abrasive residue on the inner wall; (6) Isopropanol cleaning treatment: Connect the isopropanol cleaning pipeline nozzle to the container to clean the inner wall to remove oil and grease. After cleaning, remove the isopropanol cleaning pipeline nozzle. (7) Secondary deionized water rinsing: The container is connected to deionized water and the inner wall of the container is rinsed; (8) Hot nitrogen drying: Introduce hot nitrogen into the container to heat and dry the inner wall of the container evenly; (9) Inner wall inspection: Place the cleaning rack horizontally and inspect the grease on the inner wall of the container, and then perform particulate matter inspection. If both the grease and particulate matter inspections are qualified, the grinding and processing process is qualified. If at least one inspection fails, repeat steps (1) to (9) until the inspection is qualified.

2. The process for in-drum wall composite grinding and cleaning treatment according to claim 1, characterized in that: In step (2), the container is placed horizontally on the cleaning rack. First, the tooling valves at both ends are opened, the cleaning rack is flipped to a vertical position, and then the cleaning rack is raised to discharge the coarse grinding material and grinding liquid from the bottom of the container for recycling. After all the material is discharged, the tooling valve at the top of the container is connected to the connecting pipe. The lower end of the connecting pipe is connected to a nozzle, which can spray the inner wall of the container. The upper end of the connecting pipe is connected to tap water. The connecting pipe moves up and down and back and forth to clean the inner wall of the container. The rinsing pressure is 10~20MPa.

3. The composite grinding and cleaning process for the inner wall of a container according to claim 1, characterized in that: In step (4), the container is first horizontally hoisted and fixed on the cleaning rack. The tooling valves at both ends are opened, the cleaning rack is flipped to a vertical state, and then the cleaning rack is raised to discharge the fine grinding material and grinding liquid from the bottom of the container for recycling. After all the material is discharged, the tooling valve at the top of the container is connected to the connecting pipe. The lower end of the connecting pipe is connected to a nozzle, which can spray the inner wall of the container. High-pressure tap water is connected through the connecting pipe. The connecting pipe moves up and down and back and forth to clean the inner wall of the container. The rinsing pressure is 10~20MPa.

4. The composite grinding and cleaning process for the inner wall of a container according to claim 1, characterized in that: In step (5), the connecting pipe (6) is connected to deionized water. The temperature of the deionized water is 60~90℃, the resistivity of the deionized water is 10~20MΩ, and the flushing pressure is 10~20MPa. The connecting pipe moves up and down and back and forth to clean the inner wall of the container and wash away the abrasive and grinding fluid remaining on the inner wall.

5. The composite grinding and cleaning process for the inner wall of a container according to claim 1, characterized in that: In step (6), the isopropanol cleaning pressure is 0.3~0.8MPa. The isopropanol cleaning pipeline nozzle is adjusted so that the sprayed isopropanol is atomized and covers the entire inner wall surface. The amount used is 1.5~3 liters per minute to spray oil and degrease the inner wall. After cleaning, the isopropanol cleaning pipeline nozzle is removed.

6. The composite grinding and cleaning process for the inner wall of a container according to claim 1, characterized in that: In step (7), the top of the container is connected to deionized water through a connecting pipe. The temperature of the deionized water is set to 60~90℃, the resistivity of the deionized water is 12~20MΩ, and the rinsing pressure is 10~20MPa to prevent particulate matter from adhering to the inner wall and causing floating rust. After rinsing, the rinsing hose is removed.

7. The composite grinding and cleaning process for the inner wall of a container according to claim 1, characterized in that: In step (8), the nitrogen pipe connector is connected to the tooling valve at the bottom of the container, and heated nitrogen is blown into the container. The nitrogen purging pressure is 2~5MPa, the drying temperature is 150~300℃, and the drying time is 10~60 minutes.

8. The composite grinding and cleaning process for the inner wall of a container according to claim 1, characterized in that: The coarse grinding abrasive is rhombic brown corundum, and the fine grinding abrasive is cylindrical high-frequency ceramic abrasive.

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