Universal deep-drawing stamping oil and preparation method thereof

Abstract

The invention relates to the technical field of stamping oil, and discloses universal deep-drawing stamping oil and a preparation method thereof. The universal deep drawing stamping oil is prepared from the following components in percentage by mass: 43.5 to 80 percent of base oil, 5 to 25 percent of viscosity modifier, 6 to 20 percent of extreme pressure lubricant, 0.5 to 1.5 percent of antifriction and antiwear additive, 0.5 to 2 percent of copper corrosion inhibitor, 0.5 to 2 percent of antioxidant and 3 to 6 percent of antirust agent. The universal deep-drawing stamping oil has the advantages of high lubricity, high extreme pressure antiwear property (PDgt, 800kgf, COFPD = 800lt, 0.050), no corrosion (copper corrosion is less than or equal to 1b) and long antirust period (damp heat gt, 1 week).

Description

Technical Field

[0001] The present application relates to the technical field of stamping oil, and mainly to a general deep-drawing stamping oil and a preparation method thereof. Background Art

[0002] More and more companies are transforming into multifunctional processing enterprises. Workshops may process a variety of ferrous and non-ferrous metals simultaneously. Specialized stamping oils can precisely protect metalworking processes in different working conditions. However, for companies, the excessive variety of metalworking fluids significantly increases procurement, storage, and management costs. Therefore, general-purpose deep drawing stamping oils have become the only choice for manufacturers.

[0003] General-purpose deep-drawing fluids must address the lubrication, extreme pressure, rust prevention, and environmental protection requirements of both ferrous metals (such as steel and cast iron) and non-ferrous metals (aluminum and copper alloys). Existing technologies primarily address the challenges of multi-metal compatibility, environmental regulations, and high-load lubrication by combining base oils with multifunctional additives.

[0004] Technical approaches primarily include environmentally friendly, chlorine-free technologies, offering high environmental performance and excellent rust prevention; composite additive synergistic technologies, offering multi-metal compatibility; and bio-based and water-based technologies, offering low cleaning costs and a low carbon footprint. For example, the technical solutions in CN118240607A, CN116024034A, and CN108913284A all replace hazardous chlorinated paraffins (medium- and short-chain) to avoid corrosion and environmental pollution. However, the sulfur-containing additive content is generally 20% or higher, and the extreme pressure resistance is limited (the PD index fails to meet GB / T 12583 800kg), making them unsuitable for thick plate stamping and high-deformation stamping and stretching. From a technical perspective, the negative impacts of high-sulfur additives can be categorized into three main types: corrosion, reduced oil stability, and environmental compliance risks. Regarding corrosion, active sulfur is particularly hazardous to copper alloys, forming copper sulfide that causes surface blackening, and can cause hydrogen embrittlement in steel. Regarding oil stability, small sulfur molecules such as mercaptans are easily oxidized into acidic substances, accelerating oil deterioration and reacting with zinc salts to produce precipitation. Regarding environmental protection, high sulfur content can lead to VOC and wastewater treatment pressure. In the technical solution of CN202111643242.9, the excessive phosphorus content in the composite additive synergistic technology route has posed an environmental pollution risk. In the technical solution of CN202410632966.0, the bio-based and water-based technology routes have poor adhesion, prone to film breakage during high-precision stamping, and insufficient lubrication durability.

[0005] Therefore, many existing deep drawing stamping oils cannot provide effective lubrication and rust prevention while being environmentally friendly. The existing technology needs to be improved and developed. Summary of the Invention

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a universal deep drawing stamping oil and a preparation method thereof, aiming to solve the problem that the existing deep drawing stamping oil cannot take into account lubrication, rust prevention and environmental protection.

[0007] The technical solution of this application is as follows: A general-purpose deep drawing and punching oil, wherein the general-purpose deep drawing and punching oil comprises the following components in percentage by mass: Base oil 43.5-80%, viscosity modifier 5-25%, extreme pressure lubricant 6-20%, anti-friction and anti-wear additive 0.5-1.5%, copper corrosion inhibitor 0.5-2%, antioxidant 0.5-2%, rust inhibitor 3-6%.

[0008] The universal deep drawing stamping oil of the present application utilizes the overall combination of base oil and specific additives, and is suitable for both ferrous and non-ferrous metal processing. It has the advantages of high lubricity, high extreme pressure and anti-wear, no corrosion, and a long anti-rust period.

[0009] The universal deep drawing and stamping oil, wherein the extreme pressure lubricant is a combination of sulfided fatty acid methyl ester and long-chain chlorinated paraffin; In the universal deep drawing and punching oil, the sulfided fatty acid methyl ester accounts for 1-10% by mass, and the long-chain chlorinated paraffin accounts for 5-10% by mass; The mass ratio of the sulfided fatty acid methyl ester to the long-chain chlorinated paraffin is 1:2 to 1:1.

[0010] This combination of extreme pressure lubricants has excellent extreme pressure performance and is easily soluble in oil-based machining fluids. It can more effectively enhance lubrication and reduce friction in actual use.

[0011] The universal deep drawing punching oil, wherein the viscosity modifier is polymethacrylate.

[0012] The universal deep drawing punching oil, wherein the anti-friction and anti-wear additive is modified MoDTC.

[0013] The universal deep drawing stamping oil, wherein the copper corrosion inhibitor is benzotriazole.

[0014] The universal deep drawing punching oil, wherein the antioxidant is a combination of thiophosphate butyl octyl zinc salt antioxidant and anti-corrosion agent and 2,6-di-tert-butyl-p-cresol, and the mass ratio of the thiophosphate butyl octyl zinc salt antioxidant and anti-corrosion agent to the 2,6-di-tert-butyl-p-cresol is 1:1~8:5.

[0015] The universal deep drawing punching oil, wherein the rust inhibitor is composite petroleum calcium sulfonate.

[0016] The universal deep drawing and punching oil, wherein the base oil is one or more of sunflower oil, palm oil, and rapeseed oil.

[0017] The universal deep drawing and punching oil, wherein the base oil is sunflower oil.

[0018] A method for preparing the universal deep drawing punching oil as described above, comprising the following steps: (1) mixing the viscosity modifier and the extreme pressure lubricant in the base oil and stirring at 55-60° C. until the solution becomes clear and transparent; (2) adding the anti-friction and anti-wear additive to the mixed solution obtained in step (1), stirring at 55-60° C. for 10-30 minutes, taking out and ultrasonicating for 10-30 minutes; (3) The mixed solution obtained in step (2) is cooled to room temperature, and the copper corrosion inhibitor, the antioxidant and the rust inhibitor are added thereto, and stirred for 10-30 minutes until the solution becomes clear and transparent.

[0019] Beneficial effects: The universal deep drawing stamping oil of the present application can be applied to both ferrous and non-ferrous metal processing, and has the advantages of high lubricity, high extreme pressure and anti-wear properties, no corrosion, and a long anti-rust period. DETAILED DESCRIPTION

[0020] This application provides a universal deep-drawing stamping oil and a preparation method thereof. To make the purpose, technical solution, and effects of this application more clear and explicit, this application is further described in detail below. It should be understood that the specific embodiments described herein are merely for the purpose of explaining this application and are not intended to limit this application.

[0021] Aiming at the existing technical problems, combined with the ferrous metal and nonferrous metal materials and processing processes at the production site, this application proposes a high lubricity, high extreme pressure and anti-wear (PD>800kgf, COF PD=800 <0.050), no corrosion (copper corrosion ≤ 1b), long anti-rust period (wet heat > 1 week) general-purpose deep drawing stamping oil.

[0022] The present application provides a universal deep drawing stamping oil, which can be used for both ferrous and non-ferrous metal processing. Ferrous metals such as steel have relatively low ductility and obvious work hardening, especially 304 stainless steel, which is prone to adhesive wear. Therefore, universal deep drawing stamping oil needs to focus on extreme pressure and anti-wear, and chlorinated paraffin and sulfur agent are very necessary. However, the problem of copper corrosion also needs to be taken into account, so molybdenum salt is used in the present application to neutralize the corrosiveness and ensure that the product has excellent rust resistance for ferrous metals. Different non-ferrous metals have very different requirements for universal deep drawing stamping oil: aluminum alloy is too soft and easily scratched, and requires a formula with high oil film strength but low residue; copper alloy has good thermal conductivity but is easily corroded, and the active sulfur / chlorine content must be controlled. Therefore, in the present application, thiophosphate butyl octyl zinc salt antioxidant and anti-corrosion agent is used as an antioxidant, and the content of the sulfur agent and thiophosphate butyl octyl zinc salt antioxidant and anti-corrosion agent is controlled. Additional composite petroleum calcium sulfonate and copper corrosion inhibitor are also added. The thiophosphate butyl octyl zinc salt antioxidant and anti-corrosion agent can also assist the sulfur agent and the chlorine agent to provide better lubrication.

[0023] Specifically, the general deep drawing stamping oil of the present application comprises the following components, calculated by mass percentage: Base oil 43.5-80%, viscosity modifier (polymethacrylate) 5-25%, extreme pressure lubricant 6-20% (including sulfided fatty acid methyl ester 1-10%, long-chain chlorinated paraffin 5-10%), friction reducing and anti-wear additive 0.5-1.5%, copper corrosion inhibitor 0.5-2%, antioxidant 0.5-2%, rust inhibitor 3-6%.

[0024] The universal deep drawing stamping oil of the present application is used as the original liquid during actual processing.

[0025] Base oil is the fundamental component of the general-purpose deep-drawing and stamping oil of this application. It not only serves as a carrier for the general-purpose deep-drawing and stamping oil but also possesses multiple functions, such as cooling and serving as a lubricating solvent. In this application, the base oil can be one or more of sunflower oil, palm oil, and rapeseed oil. Preferably, in the embodiment of this application, the base oil is sunflower oil, which has a bio-based lubricating phase, forms a film by adsorption of hydroxyl fatty acids (friction coefficient ↓15%), and can fully dissolve long-chain chlorinated paraffins and polymethacrylates.

[0026] During the deep drawing process, sheet metal undergoes plastic flow under high pressure and large deformation, placing extremely specific demands on the viscosity of the lubricant. A viscosity modifier controls the viscosity of the general-purpose deep drawing oil described herein within a specific range, allowing the oil to form a sufficiently thick lubricating film on the metal contact surface, preventing "dry friction"-induced die wear or workpiece scratches. During low-speed stamping, the oil maintains a certain viscosity to maintain film strength. During high-speed stamping, the viscosity modifier prevents a sharp drop in viscosity due to shear, ensuring continuous lubrication. In this embodiment, the viscosity modifier can be one or more of polyisobutylene, hydrogenated styrene-butadiene copolymer, and polymethacrylate. Preferably, in this embodiment, the viscosity modifier is polymethacrylate. Sunflower oil itself has a high viscosity index, and polymethacrylate resists shear damage through elastic deformation of its macromolecular chains, thereby increasing the oil's viscosity retention to over 80% under high-shear conditions (compared to less than 60% without a viscosity modifier).

[0027] An extreme pressure lubricant is a heavy-duty additive that forms an extreme pressure lubricating film on the surface of a friction pair under high-temperature, high-pressure boundary lubrication conditions. In the present application, the extreme pressure lubricant can be one or more of sulfided fatty acid methyl esters, chlorinated paraffins, and triesters of phthalates. Preferably, in an embodiment of the present application, the extreme pressure lubricant is a combination of sulfided fatty acid methyl esters and long-chain chlorinated paraffins, with the mass ratio of sulfided fatty acid methyl esters to long-chain chlorinated paraffins being 1:2 to 1:1. This extreme pressure lubricant combination offers excellent extreme pressure performance and is easily soluble in oil-based machining fluids, effectively enhancing lubrication and reducing friction in actual use. The molecular structure of sulfided fatty acid methyl esters contains a combination of polar activated sulfur and deactivated sulfur, which imparts high load-bearing properties to the oil. The sulfur's effects can be exerted even at low temperatures, preventing damage to equipment caused by high pressure, reducing direct contact between tools and equipment, and reducing wear caused by friction. It also reduces friction at dynamic joints, enabling it to withstand higher pressures. Furthermore, its light color and low odor reduce unpleasant odors generated during metalworking. Long-chain chlorinated paraffins are environmentally friendly. Under high pressure, they decompose to release chlorine atoms, which react chemically with metal surfaces to form thin films of ferric chloride (FeCl3) or ferrous chloride (FeCl2). These films have high hardness and low shear strength, effectively reducing the coefficient of friction (for example, from 0.12 to 0.06), thereby reducing wear caused by direct metal contact. When combined with sulfided fatty acid methyl esters, long-chain chlorinated paraffins form a synergistic "chlorine-sulfur" extreme pressure system, simultaneously releasing active chlorine and sulfur at high temperatures to enhance anti-wear properties. They can also be combined with polymethacrylates to improve the viscosity-temperature characteristics of the oil film, maintaining the stability of the extreme pressure film during temperature fluctuations.

[0028] Friction-reducing and anti-wear additives can work in conjunction with extreme pressure lubricants to meet the extreme pressure lubrication requirements in different deep drawing processes. In the present application, the friction-reducing and anti-wear additive can be one or both of MoDTC (molybdenum dialkyl dithiocarbamate) and modified MoDTC. Preferably, in the embodiment of the present application, the friction-reducing and anti-wear additive is modified MoDTC, which is sulfur-free. The friction film MoS2 (friction reduction) + MoO3 (anti-wear) and the long-chain chlorinated paraffin synergistically form Cl - Extreme pressure film + MoS layer greatly improves the four-ball sintering value and isolates Zn 2+ It can bind to copper surfaces, suppressing the potential risk of non-ferrous metal corrosion caused by the antioxidant zinc salt of thiophosphate. Modified MoDTC is based on MoDTC, but its molecular structure is altered by modifying the alkyl structure, introducing other functional groups, or using specialized synthesis processes. For example, sulfur atoms in dithiocarbamate groups may be partially or completely replaced with sulfur-free ligands to achieve a sulfur-free finish. Both MoDTC and modified MoDTC are currently available on the market and will not be discussed in detail here.

[0029] Copper corrosion inhibitors can prevent corrosion (such as discoloration, oxidation, and electrochemical corrosion) of non-ferrous metal workpieces during processing by forming a chemical adsorption film to isolate corrosive media, inhibiting electrochemical reactions to block micro-battery corrosion, and neutralizing acidic substances to eliminate corrosion inducers. In the present application, the copper corrosion inhibitor can be one of benzotriazole (BTA) and methylbenzotriazole (TTA). Preferably, in the embodiment of the present application, the copper corrosion inhibitor is benzotriazole (BTA), which can meet the above requirements for copper corrosion inhibitors.

[0030] The primary function of adding antioxidants to oil products is to significantly inhibit or delay the oxidative degradation process, maintaining oil stability and preventing performance degradation due to oxidation, thereby extending the oil's service life. Oil autooxidation typically involves three stages: chain initiation, chain elongation, and chain termination. Antioxidants inhibit oil oxidation by blocking or inhibiting a specific stage of the oxidation process. In the present application, the antioxidant may be one or more of a phenolic antioxidant or a chelated metal ion. Preferably, in an embodiment of the present application, the antioxidant is a combination of butylated zinc octylthioate and 2,6-di-tert-butylated cresol, with the mass ratio of butylated zinc octylthioate to 2,6-di-tert-butylated cresol being 1:1 to 8:5. 2,6-di-tert-butylated cresol acts as a hydrogen donor, donating hydrogen atoms to lipid free radicals, converting them into inactive or inert free radicals. This delays or interferes with the chain propagation stage of the free radical chain reaction, thereby blocking the oxidation reaction. The antioxidant and anti-corrosion agent butyl octyl zinc salt of thiophosphorus not only has excellent antioxidant effect, but can also provide excellent lubrication when combined with extreme pressure lubricants. The preferred antioxidant combination can meet the above antioxidant requirements.

[0031] Sulfonate-based rust inhibitors are the most widely used oil-soluble rust inhibitors, possessing both rust-preventing and emulsifying properties. In this application, the rust inhibitor can be one or more of the sodium, calcium, and barium salts of petroleum sulfonic acids. Preferably, in this embodiment, the rust inhibitor is a composite calcium petroleum sulfonate. The O and S atoms in the sulfonate groups form coordination bonds with metal surfaces (such as Fe and Cu), resulting in directional adsorption to form a monomolecular film. The alkyl chains are arranged outward, forming a dense hydrophobic layer that blocks the penetration of corrosive media such as H₂O and O₂. The hydrophobic film formed by the composite calcium petroleum sulfonate is approximately 2-5 nm thick and exhibits superior water washability compared to rust inhibitors based solely on physical adsorption. When compounded with BTA, the hydrophobic film of the composite calcium petroleum sulfonate enhances the adhesion of the BTA chelate film, forming a composite protective layer combining "chemical and physical films" on the copper surface.

[0032] The present application also provides a method for preparing a universal deep drawing stamping oil, comprising the following steps: (1) Mix the viscosity modifier and extreme pressure lubricant in the base oil and stir at 55-60°C until the solution becomes clear and transparent; (2) adding a friction reducing and anti-wear additive to the mixed solution obtained in step (1), stirring at 55-60°C for 10-30 minutes, taking out and ultrasonicating for 10-30 minutes; (3) The mixed solution obtained in step (2) is cooled to room temperature, and a copper corrosion inhibitor, an antioxidant and a rust inhibitor are added thereto, and stirred for 10-30 minutes until the solution becomes clear and transparent, thereby obtaining a crude oil product.

[0033] The universal deep drawing stamping oil of this application has the following advantages: (1) Excellent extreme pressure lubricity. The extreme pressure lubricant and anti-friction and anti-wear additive in the universal deep drawing stamping oil of the present application can be evenly dispersed in the processing fluid, providing a continuous and uniform lubricating film during processing. At the same time, the antioxidant and anti-corrosion agent of octyl zinc thiophosphate decomposes under high temperature and high pressure and reacts with the metal surface to form a composite film containing Zn, P, S, and O. The film thickness is about 100-200 nm, which can effectively isolate metal contact and reduce adhesive wear.

[0034] (2) No corrosion to non-ferrous metals. Using benzotriazole BTA as an oil-soluble copper corrosion inhibitor can effectively inhibit the corrosion of non-ferrous metals by sulfur and chlorine.

[0035] (3) The anti-rust period is long. The use of composite petroleum calcium sulfonate as the anti-rust system can effectively enhance the anti-rust property of oil products.

[0036] (4) Good antioxidant properties. The antioxidant in the universal deep drawing stamping oil of the present application can effectively inhibit the self-oxidation of the oil, preventing its performance degradation caused by oxidation, and has a long service life. In addition, the antioxidant and the extreme pressure lubricant complement each other, and the oil has a long service life and strong extreme pressure lubricity.

[0037] (5) High stability. The original liquid state of the universal deep drawing stamping oil of this application is stable, and no stratification will occur. It has stable performance and excellent processing effect.

[0038] The present application is further described below through specific examples.

[0039] 1. The sources of some of the raw materials used in the following examples are as follows: Sunflower oil: Standard Investment (China) Co., Ltd.; Polymethacrylate: Shandong Derui Polymer Materials Co., Ltd. Sulfurized fatty acid methyl ester: German DOG DeoAdd MD18; Long-chain chlorinated paraffin: Luxi Chemical; Modified MoDTC: POUPC1002A; Benzotriazole BTA: Notai Biotechnology; Zinc thiophosphate octyl salt antioxidant and anticorrosive agent: Shandong Fangda Chemical Technology Co., Ltd. T202; 2,6-Di-tert-Butyl-4-cresol: Zhengzhou Kangyuan Chemical Products Co., Ltd. Complex calcium petroleum sulfonate: Lubrizol 2100.

[0040] 2. The preparation method of the general deep drawing punching oil in the following examples is as follows: (1) Mix the viscosity modifier and extreme pressure lubricant in the base oil and stir at 55-60°C until the solution becomes clear and transparent; (2) adding a friction reducing and anti-wear additive to the mixed solution obtained in step (1), stirring at 55-60°C for 20 minutes, taking out and ultrasonicating for 20 minutes; (3) The mixed solution obtained in step (2) is cooled to room temperature, and a copper corrosion inhibitor, an antioxidant and a rust inhibitor are added thereto, and stirred for 20 minutes until the solution becomes clear and transparent, thereby obtaining a crude oil product.

[0041] 3. The test methods involved in the embodiments are as follows: (1) Test methods for appearance stability, @40℃ viscosity, corrosion, copper corrosion, etc.: refer to GB / T6144. Among them, corrosion is only tested on 6 series aluminum plates.

[0042] (2) The test method for extreme pressure performance shall be carried out in accordance with GB / T 12583. Tester model: Xiamen Tianji MS-10A.

[0043] (3) Rust resistance test method: in accordance with SH / T 0081. Tester model: Q-LAB humidity chamber.

[0044] Examples 1-1 to 1-6 Examples 1-1 to 1-6 each provide a universal deep drawing stamping oil, the components of the stock solution thereof are calculated by mass percentage, and the raw materials and amounts are shown in Table 1 below.

[0045] Table 1

[0046] Performance indicators of Examples 1-1 to 1-6 (maximum sintering load P D and P D =800 and the average friction coefficient cof and aluminum corrosion results are shown in Table 2 below: Table 2

[0047] As can be seen from Table 2, additives were added and tested sequentially in Examples 1-1 to 1-6 while maintaining essentially the same viscosity and viscosity index. The addition of extreme pressure agents and anti-friction agents significantly enhanced the extreme pressure and anti-wear properties. The addition of the antioxidant, octyl zinc thiophosphate, further significantly reduced the coefficient of friction. While the rust inhibitor partially adversely affected overall lubricity, it significantly enhanced the oil's rust prevention performance. The general-purpose deep drawing oil provided in Examples 1-6, through the combined effects of various ingredients, achieves high lubricity, high extreme pressure and anti-wear properties, a corrosion-free state, and a long rust prevention period.

[0048] Comparative Examples 1-1 to 1-5 Comparative Examples 1-1 to 1-5 each provide a general-purpose deep drawing stamping oil, the components of the stock solution thereof are calculated by mass percentage, and the raw materials and amounts are shown in Table 3 below.

[0049] Table 3

[0050] Performance indicators of comparative examples 1-1 to 1-5 (maximum sintering load P D and P D =800, the average friction coefficient cof, volatility and aluminum corrosion results are shown in Table 4 below: Table 4

[0051] As can be seen from Table 4, while ensuring that the viscosity and viscosity index are basically the same, Comparative Examples 1-1 and 1-2 show that the lubricity of olefin sulfide and dioctyl polysulfide is better than the extreme pressure lubricity of the sulfide fatty acid ester selected in this application, but the corrosion and copper corrosion results are unqualified, and it is very easy to cause serious corrosion to non-ferrous metals in practical applications; Comparative Examples 1-3 show that after molybdenum dioxide replaces the modified MoDTC in this application, the overall lubricity is greatly reduced, and it cannot meet the extreme pressure lubrication requirements of deep drawing and high deformation; Comparative Examples 1-4 show that after 2,2-thiobis(4-methyl-6-tert-butylphenol) replaces the zinc salt of thiophosphate in this application, the overall lubricity is greatly reduced, and the high performance requirements cannot be met. D =800 when the average friction coefficient cof <0.050; Comparative Examples 1-5 show that after barium petroleum sulfonate replaces the composite calcium petroleum sulfonate in this application, it is incompatible with the overall system, the oil becomes turbid and easily stratified after long-term storage, and the quality is unstable.

[0052] In summary, the present application utilizes the overall combination of base oil and specific additives to formulate a universal deep drawing stamping oil with high lubricity, high extreme pressure and anti-wear properties, no corrosion, and a long anti-rust period.

[0053] In summary, the universal deep drawing stamping oil of the present application has the following advantages: (1) A continuous high-strength lubricating film is formed by compounding a specific extreme pressure lubricant and a specific anti-friction and anti-wear agent, thereby greatly improving the extreme pressure and lubrication performance under deep drawing processing, solving the problem of insufficient lubrication performance and insufficient extreme pressure and anti-wear performance of general deep drawing oil in the existing technology; (2) By using a composite rust inhibitor, the lubrication and rust prevention performance are balanced, ensuring that the product's wet heat rust prevention performance is improved from three days to two weeks, solving the shortcomings of the existing technology of the general deep drawing stamping oil with a short rust prevention cycle and rust every other day.

[0054] (3) The universal deep drawing stamping oil of this application is compounded with extreme pressure lubricant and anti-wear agent, and copper corrosion inhibitor is added and active sulfur content is strictly controlled, supplemented by antioxidant, so that the universal deep drawing stamping oil of this application has high lubricity, high extreme pressure and anti-wear properties (PD>800kgf, COF PD=800 <0.050), no corrosion (copper corrosion ≤ 1b), and long anti-rust period (wet heat > 1 week), which solves the problem that existing general-purpose deep drawing stamping oils cannot simultaneously meet the high lubrication and corrosion-free performance requirements for ferrous and non-ferrous metal processing.

[0055] It should be understood that the application of this application is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of this application.

Claims

1. A universal deep drawing punching oil, characterized in that: The general deep drawing punching oil comprises the following components in percentage by mass: Base oil 43.5-80%, viscosity modifier 5-25%, extreme pressure lubricant 6-20%, anti-friction and anti-wear additive 0.5-1.5%, copper corrosion inhibitor 0.5-2%, antioxidant 0.5-2%, rust inhibitor 3-6%.

2. The universal deep drawing punching oil according to claim 1, characterized in that: The extreme pressure lubricant is a combination of sulfided fatty acid methyl ester and long-chain chlorinated paraffin; In the universal deep drawing and punching oil, the sulfided fatty acid methyl ester accounts for 1-10% by mass, and the long-chain chlorinated paraffin accounts for 5-10% by mass; The mass ratio of the sulfided fatty acid methyl ester to the long-chain chlorinated paraffin is 1:2 to 1:

1.

3. The universal deep drawing punching oil according to claim 1, characterized in that: The viscosity modifier is polymethacrylate.

4. The universal deep drawing punching oil according to claim 1, characterized in that: The friction reducing and anti-wear additive is modified MoDTC.

5. The universal deep drawing punching oil according to claim 1, characterized in that: The copper corrosion inhibitor is benzotriazole.

6. The universal deep drawing punching oil according to claim 1, characterized in that: The antioxidant is a combination of thiophosphate butyl octyl zinc salt antioxidant and anti-corrosion agent and 2,6-di-tert-butyl-p-cresol, and the mass ratio of the thiophosphate butyl octyl zinc salt antioxidant and anti-corrosion agent to the 2,6-di-tert-butyl-p-cresol is 1:1~8:

5.

7. The universal deep drawing punching oil according to claim 1, characterized in that: The rust preventive agent is composite petroleum calcium sulfonate.

8. The universal deep drawing punching oil according to claim 1, characterized in that: The base oil is one or more of sunflower oil, palm oil and rapeseed oil.

9. The universal deep drawing punching oil according to claim 1, characterized in that: The base oil is sunflower oil.

10. A method for preparing the universal deep drawing oil according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) mixing the viscosity modifier and the extreme pressure lubricant in the base oil and stirring at 55-60° C. until the solution becomes clear and transparent; (2) adding the anti-friction and anti-wear additive to the mixed solution obtained in step (1), stirring at 55-60° C. for 10-30 minutes, taking out and ultrasonicating for 10-30 minutes; (3) The mixed solution obtained in step (2) is cooled to room temperature, and the copper corrosion inhibitor, the antioxidant and the rust inhibitor are added thereto, and stirred for 10-30 minutes until the solution becomes clear and transparent.

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