Process method for preventing steel plate cutting corrosion

Abstract

The invention relates to the technical field of steel plate machining, in particular to a technological method for preventing steel plate cutting corrosion. The technical problems that according to a steel plate cutting technology in the prior art, due to the fact that a steel plate makes contact with water, a chemical reaction is likely to happen, rust is generated, the steel plate needs to be subjected to mechanical sand blasting or manual rust removal, the turnover period of the steel plate is prolonged, large manpower and material resources need to be consumed, the production cost is increased, and the production efficiency is reduced are solved. According to the technical scheme, the technological method for preventing steel plate cutting corrosion comprises the steps that metal cutting fluid with certain components and concentration is added into a water tank of cutting equipment according to the proportion, the cutting water tank has the automatic water injection and drainage storage function, water injection, drainage and rewater injection operation is conducted on the cutting water tank through an air pump, and the cutting fluid and water are fully mixed; steel plates to be cut are used; the problem that the steel plate rusts after underwater cutting can be prevented, the steel plate machining production period is shortened, the machining cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel plate processing, and in particular to a process method for preventing steel plate cutting from rusting. Background Art

[0002] Underwater cutting of steel plates has the advantages of fast cutting speed, good incision quality, and small deformation of steel plates. However, since the steel plates are very likely to undergo chemical reactions when in contact with water to generate rust, which has an adverse effect on the subsequent processability and weldability of the steel plates, it is usually necessary to mechanically sandblast or manually remove the rust from the steel plates. This method increases the turnover cycle of the steel plates, consumes a lot of manpower and material resources, increases production costs, and reduces production efficiency.

[0003] Therefore, in view of the above problems, a process method for preventing steel plates from rusting during underwater cutting is proposed. The cutting process method is improved by adding a certain proportion of cutting fluid to the cutting water to prevent the steel plates from rusting after underwater cutting. Summary of the invention

[0004] In order to overcome the problem that the steel plate cutting process under the existing technology is very likely to produce rust due to chemical reaction when the steel plate comes into contact with water, which has an adverse effect on the subsequent processability and weldability of the steel plate, it is usually necessary to remove the rust by mechanical sandblasting or manual rust removal. This method will increase the turnover cycle of the steel plate, consume a lot of manpower and material resources, increase production costs, and reduce production efficiency.

[0005] The technical solution of the present invention is: a process for preventing steel plate cutting from rusting, comprising the following steps:

[0006] S1: Prepare metal cutting fluid with specific composition and concentration;

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

[0008] S3: Fill, drain and refill the cutting water tank with water through an air pump to fully mix the cutting fluid with water;

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

[0010] S5: Perform underwater cutting of steel plates. After cutting, a protective film is formed on the surface of the steel plates to prevent the steel plates from rusting.

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

[0012] Preferably, in step S1, a metal cutting fluid with a specific composition 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: fully blending the components 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 temperature environment.

[0016] Preferably, in step S2, the prepared metal cutting fluid is added into 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, the metal cutting fluid is added slowly and circulated by the air pump to ensure that the cutting fluid and water are fully mixed in the cutting water tank to form a uniform cutting water solution.

[0018] Preferably, the cutting water tank has an automatic water filling and draining storage function, and the automatic filling and draining of water in the water tank is achieved through the control of an air pump, so as to facilitate the mixing and renewal of the cutting fluid.

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

[0020] Preferably, in step S3, the cutting water tank is filled, drained, and refilled with water by an air pump to fully mix the cutting fluid and water. The specific steps are as follows:

[0021] S301: injecting water in the water storage bag at the bottom of the cutting water tank into the cutting water tank through an air pump;

[0022] S302: After the water and the cutting fluid are mixed, the mixed liquid is discharged back into the water storage bag at the bottom of the cutting water tank, and then the mixed liquid in the water storage bag is injected back into the cutting water tank;

[0023] S303: Repeat S301-S302 operations at least twice to ensure that the cutting fluid and water are fully 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, wherein the suitable height should ensure that the steel plate is completely immersed in the cutting aqueous solution during the cutting process, and the cutting nozzle can work normally, and the cutting quality will not be affected by 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 rusting due to electrochemical reaction.

[0026] Beneficial effects of the present invention:

[0027] 1. Add the prepared metal cutting fluid into the water tank of the cutting equipment according to a certain proportion; use an air pump to fill, drain and refill the cutting water tank to fully mix the cutting fluid with water; before the steel plate is to be cut and unloaded, inject the prepared aqueous solution into the water tank and adjust it to a suitable height; perform underwater cutting of the steel plate, and after cutting, form a protective film on the surface of the steel plate to prevent the steel plate from rusting; through the process method of the present invention, during the underwater cutting of the steel plate, the effective ingredients in the cutting fluid can form a uniform and dense protective film on the surface of the steel plate, and this protective film covers the upper and lower surfaces of the steel plate, effectively isolating the direct contact between oxygen and water and the steel plate, thereby greatly reducing the possibility of rusting of the steel plate due to electrochemical reaction, and significantly improving the anti-rust performance of the steel plate;

[0028] 2. Since a protective film is formed on the surface of the steel plate after cutting, the corrosion of the steel plate material 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, the degradation of material performance or increased processing difficulty caused by rust can be avoided;

[0029] 3. In order to remove the rust generated after cutting the steel plate, the traditional method usually needs to adopt mechanical sandblasting or manual rust removal, which not only consumes a lot of manpower and material resources, but also increases the production cycle and cost; the present invention avoids the generation of rust during the cutting process through a preventive method, thereby eliminating the subsequent rust removal step and greatly reducing the production cost;

[0030] 4. The cutting fluid components used in the present invention are all environmentally friendly materials, and the circulation operation of the air pump during use realizes the full utilization and mixing renewal of the cutting fluid, reduces the discharge of waste liquid, and at the same time, since the rust removal step is omitted, the use of related chemicals and the generation of waste are also reduced, which meets the requirements of green production and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1The following is a schematic flow chart of the process steps for preventing steel plate cutting corrosion according to the present invention;

[0032] Figure 2 Shown is a schematic flow chart of the steps of fully mixing cutting fluid and water in the process method for preventing rust on steel plate cutting of the present invention. DETAILED DESCRIPTION

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

[0034] See also Figure 1-2 The present invention provides an embodiment: a process for preventing steel plate cutting from rusting, comprising the following steps:

[0035] S1: Prepare metal cutting fluid with specific composition and concentration;

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

[0037] S3: Fill, drain and refill the cutting water tank with water through an air pump to fully mix the cutting fluid with water;

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

[0039] S5: Perform underwater cutting of steel plates. After cutting, a protective film is formed on the surface of the steel plates to prevent the steel plates from rusting.

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

[0041] Preferably, in step S1, a metal cutting fluid with a specific composition 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: fully blending the components 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 temperature environment.

[0045] Preferably, in step S2, the prepared metal cutting fluid is added into 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, the metal cutting fluid is added slowly and circulated by the air pump to ensure that the cutting fluid and water are fully mixed in the cutting water tank to form a uniform cutting water solution.

[0047] Preferably, the cutting water tank has an automatic water filling and draining storage function, and the automatic filling and draining of water in the water tank is achieved through the control of an air pump, so as to facilitate the mixing and renewal of the cutting fluid.

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

[0049] Preferably, in step S3, the cutting water tank is filled, drained, and refilled with water by an air pump to fully mix the cutting fluid and water. The specific steps are as follows:

[0050] S301: injecting water in the water storage bag at the bottom of the cutting water tank into the cutting water tank through an air pump;

[0051] S302: After the water and the cutting fluid are mixed, the mixed liquid is discharged back into the water storage bag at the bottom of the cutting water tank, and then the mixed liquid in the water storage bag is injected back into the cutting water tank;

[0052] S303: Repeat S301-S302 operations at least twice to ensure that the cutting fluid and water are fully 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, wherein the suitable height should ensure that the steel plate is completely immersed in the cutting aqueous solution during the cutting process, and the cutting nozzle can work normally, and the cutting quality will not be affected by 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 rusting due to electrochemical reaction.

[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, since steel plates are very easy to rust after contact with water, the difficulty of subsequent processing and welding increases, and the production cost rises; in order to solve this problem, the enterprise decides to adopt the process method of preventing rusting of steel plate cutting of the present invention; the specific implementation steps are as follows:

[0057] 1. Cutting fluid preparation:

[0058] According to the mass percentage, accurately weigh 6% triethanolamine, 5% triethanolamine oleic acid soap, 8% palm oil, 4% castor oil and 2% SBK; in a special container, use a mechanical stirrer to fully blend the above ingredients to form a uniform cutting fluid; store the prepared cutting fluid in a cool, dark special storage room to ensure the appropriate temperature and avoid direct sunlight;

[0059] 2. Adding and mixing cutting fluid:

[0060] Clean the water tank of the cutting equipment to ensure that there are no impurities; slowly add the prepared cutting fluid into the water tank at a mass ratio of 1:20; start the air pump to cycle the water tank by filling, draining, and refilling for three cycles to ensure that the cutting fluid and water are fully mixed to form a stable cutting solution;

[0061] 3. Preparation before cutting:

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

[0063] 4. Steel plate cutting:

[0064] Start the cutting equipment and perform underwater cutting of steel plates; during the cutting process, keep the cutting water solution stable to ensure the 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 formed. Professional instruments were used to test the thickness and uniformity of the protective film to ensure that it met the anti-rust requirements.

[0067] Through the above steps, the following effects are achieved:

[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 anti-rust performance of the steel plate; after actual testing, the steel plate cut by this method was placed in a humid environment for one month, and there was still no obvious rust on the surface;

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

[0070] 3. The rust removal step is omitted, which reduces 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 components used in the present invention are all environmentally friendly materials, and the circulation operation of the air pump during use realizes full utilization and mixed renewal of the cutting fluid, reduces the discharge of waste fluid, and meets the requirements of green production and sustainable development;

[0072] Therefore, compared with the prior art, mechanical sandblasting or manual rust removal is usually required after underwater cutting of steel plates, which consumes a lot of manpower and material resources, and increases the production cycle and cost. At the same time, the waste generated during the rust removal process may also cause environmental pollution; the present invention avoids the generation of rust during the cutting process through a preventive method, eliminates the subsequent rust removal steps, and greatly improves production efficiency and environmental protection performance; at the same time, the efficient use of cutting fluid also reduces production costs, achieving a win-win situation of 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, since the steel plates are in direct contact with water, they are very easy to rust after cutting, which seriously affects the subsequent welding and assembly quality; in order to remove the rust, the factory previously needed to invest a lot of manpower and material resources for mechanical sandblasting or manual rust removal, which not only increased the production cost, but also prolonged the production cycle; in order to solve this problem, the factory decided to adopt the process method of preventing steel plate cutting rust of the present invention; the specific implementation steps are as follows:

[0075] 1. Cutting fluid preparation

[0076] Ingredient ratio (mass percentage): triethanolamine 6%, triethanolamine oleate soap 5%, palm oil 8%, castor oil 4%, SBK 2%;

[0077] Preparation process: Weigh the ingredients according to the above proportions, stir thoroughly with a blender until uniform, and then store in a special container, away from direct sunlight and high temperature environment;

[0078] 2. Adding and mixing cutting fluid

[0079] Slowly add the prepared cutting fluid into 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 filling, draining, and refilling water, and perform at least two complete cycles to ensure that the cutting fluid and water are fully mixed to form a stable cutting water solution;

[0080] 3. Preparation before cutting

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

[0082] 4. Steel plate cutting and anti-rust effect

[0083] Underwater cutting of steel plates was performed. After cutting, the surface of the steel plates was observed and a uniform and dense protective film was formed. Through measurement, the thickness of the protective film was about 0.02 mm, which could effectively isolate oxygen and water from direct contact with the steel plates.

[0084] In order to verify the effect of the present invention, a comparative experiment was carried out at the same time; under the same conditions, the cutting and rust prevention performance tests were carried out on the steel plates using the process method of the present invention and the steel plates not using the process method of the present invention; the results are shown in the following table:

[0085]

[0086] Through comparative experiments, it can be seen that the steel plate using the process method of the present invention has no rust phenomenon within 72 hours after cutting, while the steel plate not using the present invention has obvious rust within 24 hours after cutting; since a protective film is formed on the surface of the steel plate after cutting, the subsequent rust removal step is omitted, thereby greatly reducing the production cost; according to comparative experimental data, the rust removal cost of each square meter of steel plate can be saved by 2.5 yuan; after adopting the process method of the present invention, the rust removal step is omitted, so that the production cycle is shortened from 10 days to 8 days, and the production efficiency is improved; due to the formation of the protective film, the cutting quality is significantly improved, and the subsequent processing difficulty remains unchanged, which is conducive to ensuring the overall quality and processing efficiency of the product;

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

[0088] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A process for preventing steel plate cutting from rusting, characterized in that: The following steps are involved: S1: Prepare metal cutting fluid with specific composition and concentration; S2: Add the prepared metal cutting fluid into the water tank of the cutting equipment according to a certain proportion; S3: Fill, drain and refill the cutting water tank with water through an air pump to fully mix the cutting fluid with water; S4: Before the steel plate is cut, inject the prepared aqueous solution into the water tank and adjust it to a suitable height; S5: Perform underwater cutting of steel plates. After cutting, a protective film is formed on the surface of the steel plates to prevent the steel plates from rusting.

2. A process for preventing steel plate cutting corrosion according to claim 1, characterized in that: 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 in mass percentage.

3. A process for preventing steel plate cutting corrosion according to claim 1, characterized in that: In step S1, a metal cutting fluid with a specific composition and concentration is prepared, and 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: fully blending the components by stirring according to the determined component ratio to form a uniform cutting fluid; S103: Store the prepared cutting fluid in a dedicated container, away from direct sunlight and high temperature environment.

4. A process for preventing steel plate cutting corrosion according to claim 1, characterized in that: In the step S2, the prepared metal cutting fluid is added into the water tank of the cutting equipment according to a certain ratio, wherein the mass ratio of the metal cutting fluid to water is 1:

20.

5. The process for preventing steel plate cutting from rusting according to claim 1 is characterized by: When adding metal cutting fluid to the cutting water tank, add it slowly and circulate it through the air pump to ensure that the cutting fluid and water are fully mixed in the cutting water tank to form a uniform cutting water solution.

6. The process for preventing steel plate cutting from rusting according to claim 1, characterized in that: The cutting water tank has the function of automatic water filling and draining storage. The water in the water tank can be automatically filled and discharged through the control of the air pump, so as to facilitate the mixing and renewal of the cutting fluid.

7. The process for preventing steel plate cutting corrosion according to claim 1, characterized in that: In the cycle of filling, draining and refilling, at least two complete cycles are performed to ensure that the cutting fluid and water are fully mixed to form a stable cutting water solution.

8. The process for preventing steel plate from being cut and rusted according to claim 1, characterized in that: In step S3, the cutting water tank is filled, drained, and refilled with water by an air pump to fully mix the cutting fluid and water. The specific steps are as follows: S301: injecting water in the water storage bag at the bottom of the cutting water tank into the cutting water tank through an air pump; S302: After the water and the cutting fluid are mixed, the mixed liquid is discharged back into the water storage bag at the bottom of the cutting water tank, and then the mixed liquid in the water storage bag is injected back into the cutting water tank; S303: Repeat S301-S302 operations at least twice to ensure that the cutting fluid and water are fully mixed.

9. The process for preventing steel plate from being cut and rusted 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, wherein the suitable height should ensure that the steel plate is completely immersed in the cutting aqueous solution during the cutting process, and the cutting nozzle can work normally, and the cutting quality will not be affected by the aqueous solution being too high or too low.

10. The process for preventing steel plate from being cut and rusted according to claim 1, characterized in that: In step S5, the protective film covers the upper and lower surfaces of the steel plate with uniform thickness, which can effectively isolate oxygen and water from direct contact with the steel plate and prevent the steel plate from rusting due to electrochemical reaction.

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