A process for preventing the cutting of rust from steel sheets

Abstract

The present application relates to the technical field of steel plate processing, and particularly relates to a process method for preventing rusting of steel plate cutting; a technical problem: the steel plate cutting process under the prior art is prone to chemical reaction with water to generate rust, and the rust needs to be removed by mechanical sand blasting or manual rust removal method, which can increase the turnover cycle of the steel plate, consume a large amount of manpower and material resources, increase the production cost, and reduce the production efficiency; a technical scheme: a process method for preventing rusting of steel plate cutting, a certain component and concentration of metal cutting fluid is added into a cutting equipment water tank according to a proportion, the cutting water tank has automatic water injection and drainage storage functions, water injection, drainage and re-water injection operations are performed on the cutting water tank by a gas pump, so that the cutting fluid and water are fully mixed, and the mixed solution is used when the steel plate is cut; the present application can prevent rusting of the steel plate after underwater cutting, shorten the steel plate processing production cycle, reduce the processing cost, and improve the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of steel plate processing technology, and in particular to a process method for preventing rust during steel plate cutting. Background Technology

[0002] Underwater cutting of steel plates has advantages such as fast cutting speed, good cut quality, and small deformation of steel plates. However, steel plates are prone to chemical reaction with water, which generates rust. This has an adverse effect on the subsequent processing and weldability of the steel plates. Usually, mechanical sandblasting or manual rust removal is required to remove the rust. This method increases the turnover cycle of steel plates, requires more manpower and material resources, increases production costs, and reduces production efficiency.

[0003] Therefore, to address the above problems, a process method for preventing rusting of steel plates during underwater cutting is proposed. This method involves improving the cutting process by adding a certain proportion of cutting fluid to the cutting water, thereby preventing rusting of steel plates after underwater cutting. Summary of the Invention

[0004] To overcome the problem that existing steel plate cutting processes easily produce rust when steel plates come into contact with water, which adversely affects the subsequent processability and weldability of the steel plates, mechanical sandblasting or manual rust removal is usually required to remove the rust. However, this method increases the steel plate turnover cycle, requires more manpower and resources, increases production costs, and reduces production efficiency.

[0005] The technical solution of this invention is: a process for preventing rust from cutting steel plates, comprising the following steps:

[0006] S1: Formulate metal cutting fluids with specific components and concentrations;

[0007] S2: Add the prepared metal cutting fluid to the water tank of the cutting equipment according to a certain ratio;

[0008] S3: The cutting fluid and water are fully mixed by the air pump to fill, drain and refill the cutting water tank.

[0009] S4: Before the steel plate is to be cut, pour the prepared aqueous solution into the water tank and adjust it to a suitable height;

[0010] S5: Performs underwater cutting of steel plates, forming a protective film on the surface of the steel plate after cutting to prevent rust.

[0011] Preferably, the metal cutting fluid comprises 6% triethanolamine, 5% triethanolamine oleic acid soap, 8% palm oil, 4% castor oil and 2% SBK, and each component is expressed as a percentage by mass.

[0012] Preferably, in step S1, a metal cutting fluid with specific components and concentration is prepared, and the specific steps are as follows:

[0013] S101: Weigh the components of the metal cutting fluid according to the ratio of 6% triethanolamine, 5% triethanolamine oleic acid soap, 8% palm oil, 4% castor oil and 2% SBK;

[0014] S102: The components are fully mixed by stirring according to the determined component ratio to form a uniform cutting fluid;

[0015] S103: Store the prepared cutting fluid in a dedicated container, away from direct sunlight and high temperatures.

[0016] Preferably, in step S2, the prepared metal cutting fluid is added to the water tank of the cutting equipment in a certain proportion, wherein the mass ratio of the metal cutting fluid to water is 1:20.

[0017] Preferably, when adding the metal cutting fluid to the cutting water tank, it should be added slowly and circulated by an air pump to ensure that the cutting fluid and water are fully mixed in the cutting water tank to form a uniform cutting solution.

[0018] Preferably, the cutting water tank has an automatic water injection and discharge storage function. Through the control of the air pump, the water in the tank is automatically injected and discharged to facilitate the mixing and renewal of the cutting fluid.

[0019] Preferably, in the cycle of water injection, water drainage, and water re-injection, at least two complete cycles are performed to ensure that the cutting fluid and water are fully mixed to form a stable cutting solution.

[0020] Preferably, in step S3, the cutting water tank is filled, drained, and then filled again using an air pump to ensure that the cutting fluid and water are fully mixed. The specific steps are as follows:

[0021] S301: Water from the water storage bladder at the bottom of the cutting water tank is injected into the cutting water tank using an air pump;

[0022] S302: After the water and cutting fluid are mixed, the mixture is discharged back into the water reservoir at the bottom of the cutting water tank, and then the mixture in the water reservoir is injected back into the cutting water tank.

[0023] S303: Repeat S301-S302 at least twice to ensure that the cutting fluid and water are fully and evenly mixed.

[0024] Preferably, in step S4, before the steel plate is to be cut, the prepared aqueous solution is injected into the water tank and adjusted to a suitable height. The suitable height should ensure that the steel plate is completely submerged in the cutting aqueous solution during the cutting process, and that the cutting nozzle can work normally without affecting the cutting quality due to the aqueous solution being too high or too low.

[0025] Preferably, in step S5, the protective film covers the upper and lower surfaces of the steel plate and has a uniform thickness, which can effectively isolate oxygen and water from direct contact with the steel plate and prevent the steel plate from undergoing an electrochemical reaction and rusting.

[0026] The beneficial effects of this invention are:

[0027] 1. The prepared metal cutting fluid is added to the water tank of the cutting equipment in a certain proportion; the cutting fluid and water are fully mixed by filling, emptying and refilling the cutting water tank with an air pump; before the steel plate is to be cut, the prepared aqueous solution is injected into the water tank and adjusted to a suitable height; underwater cutting of the steel plate is carried out, and a protective film is formed on the surface of the steel plate after cutting to prevent the steel plate from rusting; through the process method described in this invention, during the underwater cutting of steel plates, the effective components in the cutting fluid can form a uniform and dense protective film on the surface of the steel plate. This protective film covers the upper and lower surfaces of the steel plate, effectively isolating oxygen and water from direct contact with the steel plate, thereby greatly reducing the possibility of the steel plate rusting due to electrochemical reaction and significantly improving the rust prevention performance of the steel plate;

[0028] 2. Because a protective film forms on the surface of the steel plate after cutting, the corrosion of the steel plate material by rust is reduced, thereby extending the service life of the steel plate. For steel plates that need to be stored for a long time or undergo subsequent processing, it can avoid the decline in material performance or the increase in processing difficulty caused by rust.

[0029] 3. Traditional methods for removing rust produced after cutting steel plates typically require mechanical sandblasting or manual rust removal, which not only consumes a lot of manpower and resources but also increases the production cycle and cost. This invention, through a preventative method, avoids the formation of rust during the cutting process, thereby eliminating the need for subsequent rust removal steps and greatly reducing production costs.

[0030] 4. The cutting fluid used in this invention consists of environmentally friendly materials. During use, the cutting fluid is fully utilized and mixed and renewed through the circulation operation of the air pump, reducing the discharge of waste fluid. At the same time, since the rust removal step is eliminated, the use of related chemicals and the generation of waste are also reduced, which meets the requirements of green production and sustainable development. Attached Figure Description

[0031] Figure 1The diagram shows the process steps of the present invention for preventing rust from cutting steel plates.

[0032] Figure 2 The diagram shown is a schematic flow chart of the process for preventing rust during steel plate cutting according to the present invention, which involves thoroughly mixing cutting fluid and water. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Please see Figure 1-2 The present invention provides an embodiment of a process for preventing rust from cutting steel plates, comprising the following steps:

[0035] S1: Formulate metal cutting fluids with specific components and concentrations;

[0036] S2: Add the prepared metal cutting fluid to the water tank of the cutting equipment according to a certain ratio;

[0037] S3: The cutting fluid and water are fully mixed by the air pump to fill, drain and refill the cutting water tank.

[0038] S4: Before the steel plate is to be cut, pour the prepared aqueous solution into the water tank and adjust it to a suitable height;

[0039] S5: Performs underwater cutting of steel plates, forming a protective film on the surface of the steel plate after cutting to prevent rust.

[0040] Preferably, the metal cutting fluid comprises 6% triethanolamine, 5% triethanolamine oleic acid soap, 8% palm oil, 4% castor oil and 2% SBK, and each component is expressed as a percentage by mass.

[0041] Preferably, in step S1, a metal cutting fluid with specific components and concentration is prepared, and the specific steps are as follows:

[0042] S101: Weigh the components of the metal cutting fluid according to the ratio of 6% triethanolamine, 5% triethanolamine oleic acid soap, 8% palm oil, 4% castor oil and 2% SBK;

[0043] S102: The components are fully mixed by stirring according to the determined component ratio to form a uniform cutting fluid;

[0044] S103: Store the prepared cutting fluid in a dedicated container, away from direct sunlight and high temperatures.

[0045] Preferably, in step S2, the prepared metal cutting fluid is added to the water tank of the cutting equipment in a certain proportion, wherein the mass ratio of the metal cutting fluid to water is 1:20.

[0046] Preferably, when adding the metal cutting fluid to the cutting water tank, it should be added slowly and circulated by an air pump to ensure that the cutting fluid and water are fully mixed in the cutting water tank to form a uniform cutting solution.

[0047] Preferably, the cutting water tank has an automatic water injection and discharge storage function. Through the control of the air pump, the water in the tank is automatically injected and discharged to facilitate the mixing and renewal of the cutting fluid.

[0048] Preferably, in the cycle of water injection, water drainage, and water re-injection, at least two complete cycles are performed to ensure that the cutting fluid and water are fully mixed to form a stable cutting solution.

[0049] Preferably, in step S3, the cutting water tank is filled, drained, and then filled again using an air pump to ensure that the cutting fluid and water are fully mixed. The specific steps are as follows:

[0050] S301: Water from the water storage bladder at the bottom of the cutting water tank is injected into the cutting water tank using an air pump;

[0051] S302: After the water and cutting fluid are mixed, the mixture is discharged back into the water reservoir at the bottom of the cutting water tank, and then the mixture in the water reservoir is injected back into the cutting water tank.

[0052] S303: Repeat S301-S302 at least twice to ensure that the cutting fluid and water are fully and evenly mixed.

[0053] Preferably, in step S4, before the steel plate is to be cut, the prepared aqueous solution is injected into the water tank and adjusted to a suitable height. The suitable height should ensure that the steel plate is completely submerged in the cutting aqueous solution during the cutting process, and that the cutting nozzle can work normally without affecting the cutting quality due to the aqueous solution being too high or too low.

[0054] Preferably, in step S5, the protective film covers the upper and lower surfaces of the steel plate and has a uniform thickness, which can effectively isolate oxygen and water from direct contact with the steel plate and prevent the steel plate from undergoing an electrochemical reaction and rusting.

[0055] Example 1

[0056] Optionally, in a large steel processing enterprise, underwater cutting of steel plates is a key step in the production process; however, because steel plates are extremely prone to rusting after contact with water, subsequent processing and welding become more difficult, leading to increased production costs. To solve this problem, the enterprise decided to adopt the process method of preventing rust during steel plate cutting according to the present invention; the specific implementation steps are as follows:

[0057] 1. Cutting fluid preparation:

[0058] Weigh precisely 6% triethanolamine, 5% triethanolamine oleic acid soap, 8% palm oil, 4% castor oil, and 2% SBK by weight percentage; in a dedicated container, use a mechanical stirrer to fully blend the above ingredients to form a homogeneous cutting fluid; store the prepared cutting fluid in a cool, dark, dedicated storage room, ensuring a suitable temperature and avoiding direct sunlight;

[0059] 2. Adding and mixing cutting fluid:

[0060] Clean the water tank of the cutting equipment thoroughly to ensure it is free of impurities; slowly add the prepared cutting fluid to the water tank at a mass ratio of 1:20; start the air pump and perform a cycle of filling, emptying, and refilling the water tank three times to ensure that the cutting fluid and water are fully mixed to form a stable cutting solution.

[0061] 3. Preparations before cutting:

[0062] Adjust the height and angle of the cutting nozzle according to the thickness of the steel plate and the cutting requirements; pour the prepared cutting solution into the water tank and adjust it to a suitable height to ensure that the steel plate is completely immersed in the cutting solution during the cutting process;

[0063] 4. Steel plate cutting:

[0064] Start the cutting equipment to perform underwater cutting of the steel plate; during the cutting process, maintain the stability of the cutting solution to ensure cutting quality;

[0065] 5. Observation of the effect after cutting:

[0066] After cutting, the surface of the steel plate was observed and a uniform and dense protective film was found to have formed. Professional instruments were used to test the thickness and uniformity of the protective film to ensure that it met the requirements for rust prevention.

[0067] The above steps achieved the following results:

[0068] 1. After adopting the method of the present invention, the protective film formed on the surface of the steel plate after cutting effectively isolates oxygen and water from direct contact with the steel plate, significantly improving the rust prevention performance of the steel plate; after actual testing, the steel plate cut by this method was placed in a humid environment for a month and there was still no obvious rust on the surface.

[0069] 2. Since no additional rust removal treatment is required on the surface of the steel plate after cutting, the time and cost of mechanical sandblasting or manual rust removal are saved, and production efficiency is increased by about 30%.

[0070] 3. The rust removal step is eliminated, reducing the use of related chemicals and the generation of waste. At the same time, the efficient use of cutting fluid also reduces production costs. According to preliminary estimates, the processing cost per ton of steel plate is reduced by about 10% after adopting this method.

[0071] 4. The cutting fluid used in this invention consists of environmentally friendly materials, and the air pump circulation operation during use enables full utilization and mixing of the cutting fluid, reducing waste discharge and meeting the requirements of green production and sustainable development.

[0072] Therefore, compared to existing technologies, underwater cutting of steel plates usually requires mechanical sandblasting or manual rust removal, which consumes a lot of manpower and resources, increases the production cycle and cost, and the waste generated during the rust removal process may also pollute the environment. In contrast, this invention avoids the formation of rust during the cutting process through a preventive method, eliminating the need for subsequent rust removal steps, and greatly improving production efficiency and environmental performance. At the same time, the efficient use of cutting fluid also reduces production costs, achieving a win-win situation for both economic and environmental benefits.

[0073] Example 2

[0074] Optionally, a large shipyard uses a large amount of steel plates for underwater cutting during the production process. However, because the steel plates are in direct contact with water, they are prone to rusting after cutting, which seriously affects the quality of subsequent welding and assembly. Previously, the shipyard had to invest significant manpower and resources in mechanical sandblasting or manual rust removal to remove the rust, which not only increased production costs but also extended the production cycle. To solve this problem, the shipyard decided to adopt the process method for preventing rusting during steel plate cutting according to the present invention. The specific implementation steps are as follows:

[0075] 1. Preparation of cutting fluid

[0076] Ingredient ratio (by weight): Triethanolamine 6%, Triethanolamine oleic acid soap 5%, Palm oil 8%, Castor oil 4%, SBK 2%;

[0077] Preparation process: Weigh each ingredient according to the above proportions, stir thoroughly with a stirrer until homogeneous, and then store in a special container, avoiding direct sunlight and high temperature environments;

[0078] 2. Addition and mixing of cutting fluid

[0079] Slowly add the prepared cutting fluid to the water tank of the cutting equipment at a ratio of 1:20 (cutting fluid: water); use an air pump to perform a cycle of adding water, draining water, and adding water again, and perform at least two complete cycles to ensure that the cutting fluid and water are fully mixed to form a stable cutting solution.

[0080] 3. Preparations before cutting

[0081] Before cutting the steel plate, pour the prepared aqueous solution into the water tank and adjust it to a suitable height to ensure that the steel plate is completely submerged in the cutting aqueous solution during the cutting process and that the cutting nozzle can work normally.

[0082] 4. Steel plate cutting and rust prevention effect

[0083] Underwater cutting of steel plates was performed, and after the cutting, the surface of the steel plates was observed to have formed a uniform and dense protective film. The thickness of the protective film was measured to be approximately 0.02 mm, which can effectively prevent oxygen and water from directly contacting the steel plates.

[0084] To verify the effectiveness of the present invention, a comparative experiment was conducted. Under the same conditions, cutting and rust prevention performance tests were performed on steel plates processed using the method of the present invention and those not processed using the method of the present invention. The results are shown in the table below:

[0085]

[0086] Comparative experiments show that steel plates processed using the method of this invention show no rust within 72 hours after cutting, while steel plates not processed using this invention show obvious rust within 24 hours. Because a protective film forms on the surface of the steel plate after cutting, subsequent rust removal steps are eliminated, thus significantly reducing production costs. According to comparative experimental data, rust removal costs can be reduced by 2.5 yuan per square meter of steel plate. Using the process of this invention eliminates the rust removal step, shortening the production cycle from 10 days to 8 days and improving production efficiency. Due to the formation of the protective film, cutting quality is significantly improved, while the difficulty of subsequent processing remains unchanged, which helps ensure the overall quality of the product and processing efficiency.

[0087] In summary, the process for preventing rust during steel plate cutting of the present invention has achieved significant results in the actual application of a shipyard. It not only improves rust prevention performance but also reduces production costs, shortens the production cycle, and improves cutting quality and subsequent machinability.

[0088] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A process for preventing rust during steel plate cutting, characterized in that: Includes the following steps: S1: Formulate metal cutting fluids with specific components and concentrations; S2: Add the prepared metal cutting fluid to the water tank of the cutting equipment according to a certain ratio; S3: The cutting fluid and water are fully mixed by the air pump to fill, drain and refill the cutting water tank. S4: Before the steel plate is to be cut, pour the prepared aqueous solution into the water tank and adjust it to a suitable height; S5: Performs underwater cutting of steel plates, forming a protective film on the surface of the steel plate after cutting to prevent rusting; In step S3, the cutting water tank is filled, drained, and then filled again using an air pump to ensure that the cutting fluid and water are fully mixed. The specific steps are as follows: S301: Water from the water storage bladder at the bottom of the cutting water tank is injected into the cutting water tank using an air pump; S302: After the water and cutting fluid are mixed, the mixture is discharged back into the water reservoir at the bottom of the cutting water tank, and then the mixture in the water reservoir is injected back into the cutting water tank. S303: Repeat S301-S302 at least twice to ensure that the cutting fluid and water are thoroughly and evenly mixed; The metal cutting fluid comprises 6% triethanolamine, 5% triethanolamine oleic acid soap, 8% palm oil, 4% castor oil and 2% SBK, and each component is expressed as a percentage by mass. In step S1, a metal cutting fluid with specific components and concentration is prepared. The specific steps are as follows: S101: Weigh the components of the metal cutting fluid according to the ratio of 6% triethanolamine, 5% triethanolamine oleic acid soap, 8% palm oil, 4% castor oil and 2% SBK; S102: The components are fully mixed by stirring according to the determined component ratio to form a uniform cutting fluid; S103: Store the prepared cutting fluid in a dedicated container, avoiding direct sunlight and high-temperature environments; In step S2, the prepared metal cutting fluid is added to the water tank of the cutting equipment in a certain proportion, wherein the mass ratio of the metal cutting fluid to water is 1:

20. When adding metal cutting fluid to the cutting water tank, add it slowly and circulate it with an air pump to ensure that the cutting fluid and water are fully mixed in the cutting water tank to form a uniform cutting solution. The cutting water tank has an automatic water filling and emptying storage function. Through the control of the air pump, the water in the tank is automatically injected and discharged to facilitate the mixing and renewal of the cutting fluid. In the cycle of water injection, water drainage, and water re-injection, at least two complete cycles should be performed to ensure that the cutting fluid and water are fully mixed to form a stable cutting solution.

2. The process for preventing rust during steel plate cutting according to claim 1, characterized in that: In step S4, before the steel plate is to be cut, the prepared aqueous solution is injected into the water tank and adjusted to a suitable height. The suitable height should ensure that the steel plate is completely submerged in the cutting aqueous solution during the cutting process and that the cutting nozzle can work normally without affecting the cutting quality due to the aqueous solution being too high or too low.

3. The process for preventing rust during steel plate cutting according to claim 1, characterized in that: In step S5, the protective film covers the upper and lower surfaces of the steel plate and has a uniform thickness, which can effectively isolate oxygen and water from direct contact with the steel plate and prevent the steel plate from undergoing an electrochemical reaction and rusting.

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