Rust-proof tool and rust-proof method used between metal part working procedures

Abstract

The invention discloses an anti-rust tool and an anti-rust method used between metal part working procedures, and solves the problems that according to an existing automobile part anti-rust method, various machining media such as machining oil and machining liquid on the surface of an automobile part are cleaned, additional working procedures and working hours are increased, and the anti-rust cost is increased. According to the method, the part is cleaned through the water cutting agent firstly, then oil coating and rust prevention are conducted, rust prevention can be achieved for one month between procedures, and the appearance quality of the part is guaranteed. The corrosion rate of a trial-manufactured new product is reduced from 80% to 0.35%, corrosion is effectively inhibited, and product delivery is guaranteed. According to the anti-rust tool and the anti-rust method, the working procedures and working hours of transferring and cleaning before oil coating are reduced, operation is conducted in the part machining gap, convenience and rapidness are achieved, no extra personnel is added, cleaning and water cutting of the parts between the working procedures can be rapidly achieved, oil coating and rust prevention are achieved, and the anti-rust tool and the anti-rust method are suitable for rust prevention of the automobile parts.

Description

Technical Field

[0001] The present invention relates to an anti-rust process for automotive parts, and particularly to an anti-rust tooling and an anti-rust method for metal parts during the process. Background Art

[0002] As important components of the automotive transmission system, the quality and performance of gears and shafts are directly related to the overall performance and safety of the vehicle. Since gears and shafts are both metal parts, they are prone to rust during the processing operations, which affects the product quality, reduces the part accuracy, and severe rust can lead to part scrapping, thus affecting the overall quality of automotive parts. Therefore, providing an efficient, environmentally friendly, and stable anti-rust treatment process is of great significance for ensuring the quality of automotive parts, extending their service life, and improving production efficiency.

[0003] During the manufacturing process of automotive parts, steel parts such as gears and shafts need to go through multiple processing operations. During this process, the metal surface is extremely vulnerable to oxidation and corrosion. Traditional anti-rust methods, such as anti-rust oil and vapor-phase anti-rust paper, can protect the metal surface to a certain extent, but pretreatment is required first. Anti-rust oil and vapor-phase anti-rust paper require the parts to be clean and dry. However, various processing media such as processing oil and processing fluid are used during the processing of parts. At this time, to keep the parts clean and dry, cleaning is required, which increases additional processes, man-hours, and anti-rust costs.

[0004] Patent CN101844129A discloses an automatic anti-rust treatment device and its anti-rust treatment method, which has a frame. The frame is provided with a transmission component, and the transmission component includes a circulating conveyor belt; the frame is provided with an anti-rust treatment component, and the anti-rust treatment component includes a cleaning spray component, an anti-rust spray component, and a drying component arranged at intervals in sequence, and at least part of the conveyor belt passes through the interior of the above components; its anti-rust treatment method includes the following steps: a. The workpiece is conveyed forward, and the cleaning spray component sprays a cleaning liquid on the workpiece to clean it; b. The cleaned workpiece continues to be conveyed forward, and the anti-rust spray component sprays anti-rust oil on the workpiece; c. The workpiece after spraying anti-rust oil continues to be conveyed forward, and the drying component blows hot air on the workpiece to dry it; d. The dried workpiece continues to be conveyed forward, and the cooling component blows cold air on the workpiece to cool it. In this patent, the usage amounts of the cleaning liquid and anti-rust oil are relatively large, resulting in an increase in anti-rust costs.

[0005] Patent CN208960260U provides an anti-rust oil application tank, which includes an oil tank and a bracket for supporting the oil tank; the oil tank is a rectangular structure surrounded by a first side wall, a second side wall, a third side wall, and a fourth side wall. An isolation plate is arranged in the oil tank. The isolation plate is parallel to the second side wall and divides the oil tank into two parts: an oil application tank and a draining tank; the bottoms of the oil application tank and the draining tank are both square pyramid structures, and openings are provided at the tips of each square pyramid structure, and on-off control valves are connected at the openings. This patent does not disclose an anti-rust method and cannot solve the problem of increased anti-rust costs. Summary of the Invention

[0006] The purpose of the present invention is to solve the problem that the existing anti-rust methods for metal parts clean various processing media such as processing oil and processing fluid on their surfaces, increasing additional processes, working hours, and anti-rust costs, and to provide an anti-rust tooling and anti-rust method for metal parts during the process.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0008] An anti-rust tooling for metal parts during the process, characterized in that it includes a main body box. An isolation partition is arranged in the main body box, and the main body box is divided into a water-cutting agent tank and an anti-rust tank. The bottoms of the water-cutting agent tank and the anti-rust tank are respectively connected to funnel-shaped waste discharge boxes; waste discharge valves are respectively connected to the bottoms of each waste discharge box;

[0009] The bottom of the main body box is also connected with an auxiliary material placement board for placing oil application gloves, oil application tools, and oil absorption cloth;

[0010] The water-cutting agent tank and the anti-rust tank are respectively actively connected with upper covers, and porous nylon baffles and draining plates are respectively connected in a staggered manner from bottom to top in the water-cutting agent tank and the anti-rust tank;

[0011] The bottom of the main body box is connected with a support frame, and a plurality of casters are connected to the bottom of the support frame.

[0012] An anti-rust method for metal parts during the process, characterized in that based on the above-mentioned anti-rust tooling for metal parts during the process, it includes the following steps:

[0013] Step 1: Open the upper cover, add a water-cutting agent to the water-cutting agent tank, and add anti-rust oil to the anti-rust tank;

[0014] Step 2: Place the parts to be anti-rusted in the water-cutting agent tank, and the parts to be anti-rusted are completely immersed in the water-cutting agent. Shake the parts to be anti-rusted left and right, take them out and place them on the draining plate, let them stand, turn the parts to be anti-rusted over and completely immerse them in the water-cutting agent again, let them stand, take them out and place them on the draining plate to drain;

[0015] Step 3: Put the anti-rust parts after draining in Step 2 into the anti-rust tank, and let the anti-rust parts be completely immersed in the anti-rust oil and stand still. Shake the anti-rust parts left and right, take them out and place them on the draining board to stand still. Turn over the anti-rust parts and then completely immerse them in the water-cutting agent, stand still, take them out and place them on the draining board;

[0016] Step 4: Anti-rust a batch of anti-rust parts in sequence according to Step 2 and Step 3. After completing the anti-rust of a batch of anti-rust parts, cover the two upper covers;

[0017] Step 5: When anti-rusting the next batch of anti-rust parts, open the two upper covers, open the waste discharge valve, and discharge the wastewater and waste residue at the bottom of the waste discharge tank until the water-cutting agent and anti-rust oil are discharged, then close the waste discharge valve; respectively execute Step 2 and Step 3 to anti-rust the next batch of anti-rust parts.

[0018] Further, the water-cutting agent includes a solvent, a displacing agent and other additives, wherein the solvent accounts for 95% - 98%, the displacing agent accounts for 2% - 5%, and the proportion of other additives is determined according to requirements. The total mass percentage of the above components is 100%.

[0019] Further, the solvent is one of alkane solvents, alcohol solvents and hydrocarbon solvents.

[0020] The displacing agent includes 1% - 5% of alcohol solvent, 20% - 30% of film-forming amine, 30% - 40% of organic hydroxy acid, 0.3% - 0.8% of demulsifier, and the remaining components are hydrocarbon solvents. The total mass percentage of the above components is 100%.

[0021] Further, the anti-rust oil is a thin-film anti-rust oil, including 64% - 80% of base oil, 5% - 20% of anti-rust additive, 1% - 5% of corrosion inhibitor, 2% - 10% of film-forming agent, 0.1% - 1% of antioxidant. The total mass percentage of the above components is 100%.

[0022] Further, the base oil is mineral oil or synthetic oil.

[0023] Further, in Step 2, the number of times of shaking the anti-rust parts left and right is 3 - 4 times, and the standing time is not less than 2 s.

[0024] Further, in Step 3, the number of times of shaking the anti-rust parts left and right is 3 - 4 times, the standing time of the anti-rust parts completely immersed in the anti-rust oil is 0 - 30 s, and the standing time after taking them out and placing them on the draining board is not less than 2 s.

[0025] Further, add the water-cutting agent and anti-rust oil to the water-cutting agent tank and anti-rust tank regularly respectively.

[0026] The beneficial effects of the present invention are:

[0027] 1. The present invention provides an anti-rust tooling and anti-rust method for metal parts during the process. First, the parts are cleaned with a water-cutting agent, and then oil is applied for anti-rust. It can achieve anti-rust for one month during the process, ensure the appearance quality of the parts. The rust rate of the trial-produced new products is reduced from 80% to 0.35%, effectively inhibiting the occurrence of rust and ensuring product delivery.

[0028] 2. The present invention provides an anti-rust tooling and anti-rust method for metal parts during the process, which reduces the processes and man-hours of transportation and cleaning before oil application, operates during the processing gap of the parts, is convenient and fast, and does not increase additional personnel.

[0029] 3. The present invention provides an anti-rust tooling and anti-rust method for metal parts during the process, which can quickly clean and cut water for the parts during the process and apply oil for anti-rust; it is applicable to the anti-rust of automotive parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a three-dimensional cross-sectional view of an embodiment of an anti-rust tooling for metal parts during the process provided by the present invention;

[0031] Figure 2 is a top view of an embodiment of an anti-rust tooling for metal parts during the process provided by the present invention;

[0032] Figure 3 is a side view of an embodiment of an anti-rust tooling for metal parts during the process provided by the present invention.

[0033] In the figure, 1 - upper cover; 2 - draining plate; 3 - porous nylon baffle; 4 - main body box; 5 - waste discharge valve; 6 - casters; 7 - partition board; 8 - waste discharge box; 9 - support frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] To make the objectives, advantages, and features of the present invention clearer, the following further details an anti-rust tooling and anti-rust method for metal parts during the process proposed by the present invention in combination with the accompanying drawings and specific embodiments. According to the following specific embodiments, the advantages and features of the present invention will be clearer.

[0035] Embodiment 1

[0036] An anti-rust tooling for metal parts during the process in this embodiment, as Figure 1 and Figure 2As shown in the figure, it includes a main body box 4. A partition board is arranged inside the main body box 4, and the main body box 4 is divided into a cutting agent tank and an anti-rust tank. Among them, the cutting agent tank is used to place the cutting agent, and the anti-rust tank is used to place the anti-rust oil; the bottoms of the cutting agent tank and the anti-rust tank are respectively connected to a funnel-shaped waste discharge box 8; the bottom of each waste discharge box 8 is respectively connected to a waste discharge valve 5. The waste discharge box 8 is used to deposit waste residues, and then the waste residues are discharged through the waste discharge valve 5, which can ensure the cleanliness of the auxiliary materials.

[0037] In this embodiment, upper covers 1 are respectively actively connected to the cutting agent tank and the anti-rust tank. The upper covers 1 are made of stainless steel; when the oiling tank is not in use, cover the upper covers 1. There are hooks on the upper covers 1 that can cooperate with the holes on the back of the box body. When in use, the covers can be hung on the back of the main body box 4.

[0038] In this embodiment, the bottom of the main body box is also connected with an auxiliary material placement board, which is used to place oiling gloves, oiling tools, and oil-absorbing cloth.

[0039] In this embodiment, multi-control nylon baffles 3 and drain boards 2 are respectively and staggeredly connected from bottom to top in the cutting agent tank and the anti-rust tank; to prevent bumping and the parts from contacting the water and impurities at the bottom of the hopper tank, which affects the anti-rust effect.

[0040] In this embodiment, as Figure 2 and Figure 3 shown, the bottom of the main body box 4 is connected with a support frame 9. The bottom of the support frame is connected with a plurality of casters 6. The support frame 9 plays a protective role for the waste discharge box 8 and the waste discharge valve 5. At the same time, the entire anti-rust tooling can be moved according to actual needs through the plurality of casters 6.

[0041] During the process of using the above tooling for cleaning and anti-rust, impurities (such as grinding mud, iron filings, etc.) will be introduced. When the impurity content is too high, the anti-rust will fail. It is necessary to regularly maintain the cutting agent and the anti-rust oil. Select a filter oil machine model 220V SLUC-16*5 (220V working voltage, double barrels, five-stage filtration, 16L / min, maximum filtration accuracy 5μm), which can effectively filter the solid impurities in the cutting agent and the anti-rust oil. This equipment is portable, small and easy to move, can meet the maintenance of the anti-rust auxiliary materials during the process, restore the auxiliary materials to the initial state, and ensure the anti-rust effect.

[0042] This embodiment also provides an anti-rust method for metal parts during the process. Based on the above anti-rust tooling for metal parts during the process, it includes the following steps:

[0043] Step 1: Open the upper cover 1, add the cutting agent to the cutting agent tank, and add the anti-rust oil to the anti-rust tank. The added amount should ensure that the parts can be immersed.

[0044] The cutting agent includes an alkane solvent with a mass fraction of 95%, a replacement agent with a mass fraction of 2%, and other additives, and the proportion of other additives is 3%.

[0045] Among them, the alcohol solvent includes 1% by mass of alcohol solvent, 22% by mass of film-forming amine, 30% by mass of organic hydroxy acid, 0.3% by mass of demulsifier, and 46.7% by mass of hydrocarbon solvent.

[0046] In this embodiment, the rust preventive oil is a thin-film rust preventive oil, which includes 64% by mass of base oil, 20% by mass of rust preventive additive, 5% by mass of corrosion inhibitor, 10% by mass of film-forming agent, and 1% by mass of antioxidant.

[0047] Step 2: Place the parts to be rust-prevented into the water-cutting agent tank, and completely immerse the parts to be rust-prevented in the water-cutting agent. Shake the parts to be rust-prevented left and right 3 times, let stand for 5 s, take them out and place them on the draining board 2, let stand, turn over the parts to be rust-prevented and completely immerse them in the water-cutting agent again, let stand, take them out and place them on the draining board 2 to drain.

[0048] Step 3: Place the parts to be rust-prevented drained in Step 2 into the rust preventive tank, and completely immerse the parts to be rust-prevented in the rust preventive oil. Shake the parts to be rust-prevented left and right 3 times, let stand for 5 s, take them out and place them on the draining board 2, let stand, turn over the parts to be rust-prevented and completely immerse them in the water-cutting agent, let stand, take them out and place them on the draining board 2.

[0049] Step 4: Rust-proof a batch of parts to be rust-prevented in sequence according to Step 2 and Step 3. After completing the rust prevention of a batch of parts to be rust-prevented, cover the two upper covers 1.

[0050] Step 5: When rust-proofing the next batch of parts to be rust-prevented, open the two upper covers 1, open the waste discharge valve 5, and discharge the waste water and waste residues at the bottom of the waste discharge tank 8 until the water-cutting agent and rust preventive oil are discharged, then close the waste discharge valve 5; respectively execute Step 2 and Step 3 to rust-proof the next batch of parts to be rust-prevented.

[0051] After standing for 1 h after each batch is completed or before each rust prevention operation, use a 500 mL transparent sampling bottle to discharge the water and impurities from the two waste discharge ports until the discharged water-cutting agent and rust preventive oil are in the same condition as that in the liquid tank.

[0052] Filter the water-cutting agent and rust preventive oil in the two liquid tanks once a week with an oil filter, and replenish the filtered water-cutting agent and rust preventive oil to the high liquid level again.

[0053] Embodiment 2

[0054] Different from Embodiment 1, a rust prevention method for metal parts during the process in this embodiment includes the following steps:

[0055] Step 1: Open the upper cover 1, add water-cutting agent to the water-cutting agent tank, and add rust preventive oil to the rust preventive tank.

[0056] The water-cutting agent comprises an alcohol solvent with a mass fraction of 97% and a displacement agent with a mass fraction of 3%.

[0057] Among them, the displacement agent, by mass fraction, comprises 3% of an alcohol solvent, 25% of a film-forming amine, 35% of an organic hydroxy acid, 0.5% of a demulsifier, and a hydrocarbon solvent with a mass fraction of 36.5%.

[0058] The rust preventive oil is a thin-layer rust preventive oil, which comprises 70% of a synthetic oil, 16% of a rust preventive additive, 5% of a corrosion inhibitor, 10% of a film-forming agent, and 1% of an antioxidant.

[0059] Step 2: Place the parts to be rust-prevented into the water-cutting agent tank, and fully immerse the parts to be rust-prevented in the water-cutting agent. Shake the parts to be rust-prevented left and right 4 times and let them stand for 5 s. After fishing them out, place them on the draining board 2 and let them stand for 5 s. Flip the parts to be rust-prevented and fully immerse them in the water-cutting agent again, let them stand for 5 s, and after fishing them out, place them on the draining board 2 to drain.

[0060] Step 3: Place the parts to be rust-prevented drained in Step 2 into the rust preventive tank, and fully immerse the parts to be rust-prevented in the rust preventive oil for 30 s. Shake the parts to be rust-prevented left and right 4 times and let them stand for 5 s. After fishing them out, place them on the draining board 2 and let them stand. Flip the parts to be rust-prevented and fully immerse them in the water-cutting agent again, let them stand for 5 s, and after fishing them out, place them on the draining board 2.

[0061] Step 4: Rust-proof the parts to be rust-prevented in one batch in sequence according to Step 2 and Step 3. After completing the rust prevention of the parts to be rust-prevented in one batch, cover the two upper covers 1.

[0062] Step 5: When rust-proofing the parts to be rust-prevented in the next batch, open the two upper covers 1, open the waste discharge valve 5, and discharge the waste water and waste residues at the bottom of the waste discharge tank 8 until the water-cutting agent and the rust preventive oil are discharged, then close the waste discharge valve 5; respectively execute Step 2 and Step 3 to rust-proof the parts to be rust-prevented in the next batch.

[0063] Add the water-cutting agent and the rust preventive oil to the water-cutting agent tank and the rust preventive tank regularly respectively.

[0064] Example 2

[0065] Different from Example 1, a rust prevention method for metal parts during the process in this example comprises the following steps:

[0066] Step 1: Open the upper cover 1, add the water-cutting agent to the water-cutting agent tank, and add the rust preventive oil to the rust preventive tank.

[0067] In this example, the water-cutting agent comprises a hydrocarbon solvent with a mass fraction of 96%, a displacement agent with a mass fraction of 2%, and other additives with a mass fraction of 2%.

[0068] Among them, the displacement agent includes, by mass fraction, 5% of an alcohol solvent, 30% of a film-forming amine, 40% of an organic hydroxy acid, 0.8% of a demulsifier, and 24.2% of a hydrocarbon solvent.

[0069] In this embodiment, the rust preventive oil is a thin-layer rust preventive oil, including 80% of mineral oil, 15% of rust preventive additives, 1% of corrosion inhibitors, 3% of film-forming agents, and 1% of antioxidants.

[0070] Step 2: Place the parts to be rust-prevented into the water-cutting agent tank, and fully immerse the parts to be rust-prevented in the water-cutting agent. Shake the parts to be rust-prevented 4 times left and right, let stand for 10 s, take them out and place them on the draining board 2, let stand for 10 s, turn over the parts to be rust-prevented and fully immerse them in the water-cutting agent again, let stand for 10 s, take them out and place them on the draining board 2 to drain.

[0071] Step 3: Place the parts to be rust-prevented drained in Step 2 into the rust preventive tank, and fully immerse the parts to be rust-prevented in the rust preventive oil and let stand for 30 s. Shake the parts to be rust-prevented 4 times left and right, take them out and place them on the draining board 2, let stand for 10 s, turn over the parts to be rust-prevented and fully immerse them in the water-cutting agent again, let stand for 10 s, take them out and place them on the draining board 2.

[0072] Step 4: Rust the parts to be rust-prevented in one batch according to Step 2 and Step 3 in sequence to complete the rust prevention of one batch of parts to be rust-prevented, and cover the two upper covers 1.

[0073] Step 5: When rust-preventing the next batch of parts to be rust-prevented, open the two upper covers 1, open the waste discharge valve 5, and discharge the wastewater and waste residues at the bottom of the waste discharge tank 8 until the water-cutting agent and rust preventive oil are discharged, then close the waste discharge valve 5; respectively execute Step 2 and Step 3 to rust-prevent the next batch of parts to be rust-prevented.

[0074] Add the water-cutting agent and rust preventive oil to the water-cutting agent tank and rust preventive tank regularly respectively.

[0075] In the present invention, the water cutting agent formed by the combination of "hydrocarbon solvent + displacement agent" can well meet the cleaning and dehydration requirements during the process, and can be directly coated with oil for rust prevention after treatment. The solvent is mainly a hydrocarbon solvent, and the "displacement agent" is composed of multiple components such as alcohol solvents, film-forming amines, organic hydroxy acids, and demulsifiers. These components cooperate with each other, enabling the water cutting agent to have strong cleaning ability and the function of quickly removing moisture. The water cutting agent can clean the processing medium, grinding mud, iron filings and other sundries during the processing. Since the water cutting agent contains a large amount of solvent, the compatibility between the water cutting agent and the rust preventive oil needs to be considered and a solubility test is required. After inter-process rust prevention, the subsequent process will be directly processed. The selected rust preventive oil needs to be a thin-film rust preventive oil to avoid excessive application of rust preventive oil into the processing fluid, resulting in pollution and thus reducing the service life of the processing fluid. For the above reasons, a solvent-diluted thin-film rust preventive oil is selected. Thus, a rust prevention combination of the water cutting agent formed by the combination of "hydrocarbon solvent + displacement agent" and the solvent-diluted thin-film rust preventive oil is formed. After the parts are treated with the water cutting agent, they can be directly coated with oil for rust prevention treatment. Through tests, the rust prevention period of the parts processed during the process by the "water cutting + oil coating" process can reach 1 month, which can meet the temporary rust prevention requirements for the processing of automotive parts during the process.

[0076] There are several characteristics of inter-process rust prevention: temporariness, convenience, and high efficiency. The rust prevention process is always executed temporarily. When it is recognized that the rust prevention process needs to be executed, the rust prevention operation needs to be quickly realized. The site for the rust prevention operation is the inter-process area or the part temporary storage area, where the available operating space around is small, and the rust prevention operation needs to be quickly realized.

[0077] Based on the requirements of the above rust prevention method, the present invention also provides an anti-rust tooling for metal parts during the process.

[0078] By using the anti-rust tooling and anti-rust method for automotive parts in Example 1 to carry out rust prevention on automotive parts, the rust rate is reduced from 80% to 0.35%. It can be seen from this that the rust prevention method of the present invention can effectively inhibit the occurrence of rust and ensure product delivery.

[0079] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. An anti-rust tooling for metal parts during the process, characterized in that, It includes a main body box (4), in which a partition board (7) is arranged, and the main body box (4) is divided into a cutting agent tank and an anti-rust tank. The bottoms of the cutting agent tank and the anti-rust tank are respectively connected to a funnel-shaped waste discharge box (8); the bottom of each waste discharge box (8) is respectively connected to a waste discharge valve (5); The bottom of the main body box (4) is also connected to an auxiliary material placement board for placing oiling gloves, oiling tools, and oil-absorbing cloth; The cutting agent tank and the anti-rust tank are respectively actively connected with upper covers (1), and porous nylon baffles (3) and draining boards (2) are respectively and staggeredly connected in the cutting agent tank and the anti-rust tank from bottom to top; The bottom of the main body box (4) is connected to a support frame (9), and the bottom of the support frame is connected with a plurality of casters (6).

2. An anti-rust method for metal parts during the process, characterized in that, Using the anti-rust tool for metal parts during the process as described in claim 1, it includes the following steps: Step 1: Open the upper cover (1), add a cutting agent to the cutting agent tank, and add an anti-rust oil to the anti-rust tank; Step 2: Put the parts to be anti-rusted into the cutting agent tank, and the parts to be anti-rusted are completely immersed in the cutting agent. Shake the parts to be anti-rusted left and right, take them out and place them on the draining board (2), let them stand still, turn over the parts to be anti-rusted and then completely immerse them in the cutting agent again, let them stand still, take them out and place them on the draining board (2) to drain; Step 3: Put the parts to be anti-rusted drained in Step 2 into the anti-rust tank, and let the parts to be anti-rusted stand still completely immersed in the anti-rust oil. Shake the parts to be anti-rusted left and right, take them out and place them on the draining board (2) to stand still, turn over the parts to be anti-rusted and then completely immerse them in the cutting agent again, let them stand still, take them out and place them on the draining board (2); Step 4: Anti-rust a batch of parts to be anti-rusted in sequence according to Step 2 and Step 3. After completing the anti-rust of a batch of parts to be anti-rusted, cover the two upper covers (1); Step 5: When anti-rusting the next batch of parts to be anti-rusted, open the two upper covers (1), open the waste discharge valve (5), discharge the wastewater and waste residues at the bottom of the waste discharge box (8) until cutting agent and anti-rust oil are discharged, then close the waste discharge valve (5); respectively execute Step 2 and Step 3 to anti-rust the next batch of parts to be anti-rusted.

3. The rust prevention method for metal parts during the process according to claim 2, characterized in that, The cutting agent includes a solvent, a displacing agent, and other additives. Among them, the solvent accounts for 95% - 98%, the displacing agent accounts for 2% - 5%, and the proportion of other additives is determined according to requirements. The total mass percentage of the above components is 100%.

4. The rust prevention method for metal parts during the process according to claim 3, characterized in that, The solvent is one of alkane solvents, alcohol solvents, and hydrocarbon solvents.

5. The rust prevention method for metal parts during the process according to claim 3, characterized in that, The displacing agent includes 1% - 5% of alcohol solvents, 20% - 30% of film-forming amines, 30% - 40% of organic hydroxy acids, 0.3% - 0.8% of demulsifiers, and the remaining components are hydrocarbon solvents. The total mass percentage of the above components is 100%.

6. The rust prevention method for metal parts during the process according to claim 2, wherein The anti-rust oil is a thin-film anti-rust oil, including 64% - 80% of base oil, 5% - 20% of anti-rust additives, 1% - 5% of corrosion inhibitors, 2% - 10% of film-forming agents, 0.1% - 1% of antioxidants. The total mass percentage of the above components is 100%.

7. The rust prevention method for metal parts during the process according to claim 6, characterized in that, The base oil is mineral oil or synthetic oil.

8. The rust prevention method for metal parts during the process according to claim 2, characterized in that, In Step 2, the number of times of shaking the parts to be anti-rusted left and right is 3 - 4 times, and the standing time is not less than 2s.

9. The rust prevention method for metal parts during the process according to claim 2, characterized in that, In step 3, the number of times of shaking the rust-proof part left and right is 3 to 4 times, the standing time of the rust-proof part completely immersed in the rust-proof oil is 0 to 30 s, and the standing time after fishing out and placing on the draining board (2) is not less than 2 s.

10. The rust prevention method for metal parts during the process according to claim 2, characterized in that, Add cutting fluid and rust-proof oil to the cutting fluid tank and rust-proof tank regularly respectively.

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