Manufacturing method for metal press-formed products

Abstract

In the manufacturing of metal press-formed products, there is no need to form a lubricating film prior to pressing. Therefore, there is no deterioration or damage to the pre-formed lubricating film, and the manufacturing cost can be reduced. [Solution] A method for manufacturing a metal press-formed product, comprising forming a liquid film containing a water-based resin and a lubricant, as well as an oil film, between the surface of a metal plate and the surface of a mold, and then press-forming the product.

Description

[Technical Field]

[0001] This invention relates to a technology for improving press formability in the manufacturing of press-formed parts by press-forming metal sheets, by enhancing the sliding properties of the metal sheet surface. In particular, it relates to a technology for improving the press formability of thin steel sheets for automotive applications. [Background technology]

[0002] One of the problems that can occur when metal sheets are press-formed is cracking of the press-formed product. To suppress this cracking, it is common practice to apply high-viscosity oil to the mold and the surface of the metal sheet in order to improve the sliding properties of the metal sheet.

[0003] Regarding press technology, Patent Document 1 describes a method of efficiently applying lubricating oil by drilling numerous small-diameter lubricating oil discharge ports into the mold.

[0004] Patent document 2, although not primarily focused on crack prevention, proposes a method of applying boron nitride powder to the surface of a steel sheet as a technique to suppress galling with the mold. This technique is intended for a manufacturing method called hot stamping, in which the steel sheet is heated before pressing, tempered to a structure with excellent workability, and then placed in the mold, where it is hardened during pressing.

[0005] Patent Document 3 discloses a coating for metal sheets that provides a coating for forming a film on metal sheets that are difficult to press-form, where the sliding resistance is low in areas prone to cracking during press forming, and where surface pressure is high and mold galling is expected, and where the surface pressure is high and mold galling is expected. The coating comprises an acrylic resin having a glass transition temperature (Tg) of 100°C or higher and an acid value-to-glass transition temperature ratio R = acid value (mg-KOH / g) / Tg (°C) of 1.50 or higher, and a polyolefin wax having a melting point of 100°C to 145°C and an average particle size of 3.0 μm or less. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 04-371323 [Patent Document 2] Japanese Patent Publication No. 2005-334960 [Patent Document 3] Japanese Patent Publication No. 2023-059205 [Overview of the project] [Problems that the invention aims to solve]

[0007] The commonly used method of applying high-viscosity oil is a technique applied to suppress necking and minor cracks, and to prevent sudden cracks that occur when press conditions fluctuate during mass production. However, it cannot prevent cracks that deviate significantly from the threshold for estimating the forming margin in pre-forming simulations. Similarly, technologies based on lubricating oil, such as those described in Patent Document 1, are presumably effective in suppressing necking and minor cracks, but are not expected to be effective for forming that significantly exceeds the material's inherent fracture threshold (e.g., plate thickness reduction rate).

[0008] While the technology described in Patent Document 2 is considered useful for suppressing galling, it cannot be expected to improve moldability.

[0009] The technology described in Patent Document 3 has the problem that, because heating and drying treatment is required after applying the coating for metal plates, the production of steel plates coated with a lubricating film takes a lot of time and cost.

[0010] Furthermore, if a lubricating film is formed on the metal plate beforehand, there is a problem that the coil may be crushed due to slippage when winding the metal plate into a coil or during storage and transportation.

[0011] Furthermore, if a resin-based coating is applied beforehand, there is the problem that the resin-based coating deteriorates over time.

[0012] The present invention has been made in view of the above problems, and in the production of metal press-molded products, good formability can be achieved without forming a lubricating film prior to pressing. Therefore, there is no deterioration or damage to the previously formed lubricating film, and the production cost can be reduced. The purpose is to provide a method for producing metal press-molded products.

Means for Solving the Problems

[0013] The inventors of the present application have conducted intensive research to solve the above problems. As a result, in a method of performing press molding by forming a liquid film and an oil film between the surface of a metal plate and the surface of a mold, it has been found that the above problems can be solved by containing an aqueous resin and a lubricant in the aforementioned liquid film.

[0014] The present invention has been completed based on the above findings, and the gist is as follows. [1] A method for producing a metal press-molded product, characterized in that press molding is performed by forming a liquid film and an oil film between the surface of a metal plate and the surface of a mold, and the aforementioned liquid film contains an aqueous resin and a lubricant. [2] The method for producing a metal press-molded product according to [1], characterized in that a liquid film containing the aforementioned aqueous resin and lubricant is formed on the aforementioned oil film formed on the surface of the metal plate. [3] The method for producing a metal press-molded product according to [1] or [2], characterized in that the aforementioned aqueous resin is an acrylic resin. [4] The method for producing a metal press-molded product according to [1] or [2], characterized in that the aforementioned lubricant contains a wax component. [5] The method for producing a metal press-molded product according to [3], characterized in that the aforementioned lubricant contains a wax component. [6] The concentration range of the aforementioned acrylic resin is 1% by mass or more and 50% by mass or less as a solid content, the concentration range of the aforementioned wax component is 1% by mass or more and 30% by mass or less as a solid content, and the total of the concentration of the aforementioned acrylic resin and the concentration of the aforementioned wax component is 2% by mass or more and 80% by mass or less. The method for producing a metal press-molded product according to [4]. [7] The concentration range of the aforementioned acrylic resin is 1% by mass or more and 50% by mass or less in terms of solid content, the concentration range of the aforementioned wax component is 1% by mass or more and 30% by mass or less in terms of solid content, and the total of the concentration of the aforementioned acrylic resin and the concentration of the wax component is 2% by mass or more and 80% by mass or less, which is the manufacturing method of the metal press-formed product described in [5]. [8] The average adhesion amount of the aforementioned oil film to the metal plate or the mold is 0.5 g / m , , ,

[0018] , , or more and 3 g / m 2 or less. The average adhesion amount of the aforementioned liquid containing the aqueous resin and the lubricant to the metal plate or the mold is 0.5 g / m 2 or more and 10 g / m 2 or less, which is the manufacturing method of the metal press-formed product described in [1] or [2].

Advantages of the Invention

[0015] In the present invention, in the manufacture of metal press-formed products, there is no need to form a lubricating film prior to pressing. Therefore, there is no deterioration or damage to the pre-formed lubricating film, and high formability equal to or higher than that in the case of forming a lubricating film prior to pressing can be exhibited.

[0016] In particular, since the application of the lubricating film to the metal plate can be simplified, the manufacture of press-formed products can be realized at a lower cost and in a shorter period than the conventional technology of forming a lubricating film in advance.

Brief Description of the Drawings

[0017] [Figure 1] Flat sliding tester [Figure 2] Flat sliding test tool [Figure 3] Cross-sectional view of the square tube deep drawing test die [Figure 4] An example of the appearance of the square tube deep drawn product

Modes for Carrying Out the Invention

[0018] The present invention relates to a technology for manufacturing a metal press-formed product, characterized in that a liquid film and an oil film are formed between the surface of a metal sheet and the surface of a mold during press molding, and the liquid film contains an aqueous resin and a lubricant. In particular, excellent press formability can be obtained by forming a liquid film containing an aqueous resin and a lubricant on top of the oil film formed on the surface of the metal sheet.

[0019] The present invention allows for the simplified application of a lubricating film to a metal plate, thereby achieving lower costs and shorter manufacturing times compared to conventional techniques that require the pre-formation of a lubricating film.

[0020] Here, the lubricating fluid is in the liquid phase, the lubricating film is the state in which the lubricating fluid is applied to the object to be coated, and the lubricating coating is the state in which the lubricating film has undergone a phase change to a solid phase.

[0021] The aqueous resin and lubricant-containing liquid film of the present invention refers to a liquid film that, when present at the interface between a metal plate and a press molding die, exhibits the characteristic of reducing the coefficient of friction compared to the case where no liquid film is present. Similarly, the oil film refers to an oil film that, when present at the interface between a metal plate and a press molding die, exhibits the characteristic of reducing the coefficient of friction compared to the case where no oil film is present. An example of the aqueous resin and lubricant-containing liquid film of the present invention is an aqueous solution containing resin and wax as described in Patent Document 3, but it is not particularly limited as long as it is a liquid film that, when present on the surface of a metal plate, exhibits the characteristic of reducing the coefficient of friction compared to the case where no lubricating liquid film is present. An example of the oil film of the present invention is Sugimura Chemical Industry's press cleaning oil Preton (registered trademark) R352L, but it is not particularly limited as long as it is a liquid film that exhibits the characteristic of reducing the coefficient of friction compared to the case where no oil film is present.

[0022] The metal of the metal sheet is not particularly limited. The present invention applies to metal sheets that are press-formed using a die. Steel sheets are particularly preferred as metal sheets. Among steel sheets, galvanized steel sheets, which have excellent rust resistance, and especially alloyed hot-dip galvanized steel sheets, which allow for a relatively low-cost increase in plating adhesion compared to electro-galvanized steel sheets and have superior weldability, are widely used in building materials and automotive applications. However, galvanized steel sheets often have inferior press-formability compared to steel sheets without zinc plating. This is thought to be because the soft, low-melting-point zinc softens during press forming, increasing the contact resistance with the press die. Therefore, the present invention, which dramatically improves lubricity during press forming, is an effective technology for hot-dip galvanized steel sheets. In particular, it is highly effective in press forming of alloyed hot-dip galvanized steel sheets, which are widely used in press forming.

[0023] The mold is not particularly limited. Any mold used for metal press forming is eligible to apply to the present invention.

[0024] Next, as an example of application of the present invention, we will describe the application technique using alloyed hot-dip galvanized steel sheets (hereinafter sometimes abbreviated as GA).

[0025] Traditionally, when GA (gas-based alloy) is required for applications involving complex molding that is difficult to press-form, it has been used as a lubricated steel sheet by applying a lubricant to the surface of the GA with a coater, resulting in a solid-phase lubricating film derived from the lubricant on the surface of the GA.

[0026] In contrast, the present invention is a technology characterized by forming a liquid film and an oil film between the surface of the GA and the surface of the die during press forming, rather than forming a steel sheet with a lubricating film in advance as described above, and the liquid film contains an aqueous resin and a lubricant.

[0027] Here, press formability is generally evaluated by a flat plate sliding test. The flat plate sliding test method in the present invention will be described below. Flat plate sliding test An example of an embodiment of the present invention is shown using a flat plate sliding test as an example.

[0028] A flat sliding test was conducted using the flat sliding tester shown in Fig. 1 and the flat sliding test tool shown in Fig. 2. As shown in Fig. 1, a friction coefficient measurement sample 1 taken from a test material is fixed to a sample table 2, and the sample table 2 is fixed to the upper surface of a horizontally movable slide table 3. On the lower surface of the slide table 3, a vertically movable slide table support base 5 having a roller 4 in contact with it is provided. By pushing this up, a first load cell 7 for measuring the pressing load N applied to the friction coefficient measurement sample 1 by the flat sliding test tool is attached to the slide table support base 5. A second load cell 8 for measuring the sliding resistance force F for moving the slide table 3 in the horizontal direction in the state where the above pressing force is applied is attached to one end of the slide table 3. (1) Metal plate An alloyed hot-dip galvanized steel sheet SGCD4 (JIS G3302: 2019) with a tensile strength of 270 MPa and a thickness of 1.0 mm was used as the test material. (2) Test material conditions Condition 1: A press cleaning oil (Pleton (registered trademark) R352L) manufactured by Sugimura Chemical Industry Co., Ltd., which is oily as an oil film, was sprayed onto the surface in contact with the GA tool to achieve an adhesion amount of 2 g / m 2 and applied. Condition 2: A water-soluble lubricant was sprayed onto the surface in contact with the GA tool and dried with an IH heater so that the maximum temperature reached by the steel sheet was 80°C, and a film was formed to achieve an adhesion amount of 1.5 g / m 2 . Then, a press cleaning oil (Pleton (registered trademark) R352L) manufactured by Sugimura Chemical Industry Co., Ltd. was sprayed onto the surface as an oil film to achieve an adhesion amount of 2 g / m 2 and applied. Condition 3: A press cleaning oil (Pleton (registered trademark) R352L) manufactured by Sugimura Chemical Industry Co., Ltd. was sprayed onto the surface in contact with the GA tool to achieve an adhesion amount of 2 g / m 2 and applied. Then, a liquid containing an aqueous resin and a lubricant was sprayed onto it to achieve an adhesion amount of 5 g / m 2 and applied. The liquid containing the oil film, the aqueous resin, and the lubricant is in a liquid phase state. Condition 4: Spray 5g / m of a liquid containing a water-based resin and lubricant onto the surface of the GA tool that comes into contact with it. 2 Apply the mixture to achieve the desired adhesion amount, leaving it in a liquid phase. Then, spray 2g / m² of Sugimura Chemical Industry's press cleaning oil (Preton® R352L) onto it as an oil film. 2 It was applied in such an amount that it adhered to the surface. A plate sliding test was conducted under the four conditions described above.

[0029] The flat plate sliding test is a test to evaluate the coefficient of friction. A tool (flat plate sliding test tool 6) with a width of 10 mm and a length of 59 mm that contacts the test piece was pressed against the test piece 1 with a force of 4 kN, and the test piece was withdrawn at a rate of 20 cm / min to calculate the coefficient of friction.

[0030] To calculate the coefficient of friction, sliding tests were conducted three times consecutively on each of the three test materials, and the data from the latter half of the sliding motion in the second and third friction tests was averaged to calculate the coefficient of friction.

[0031] The components and concentrations of the liquid containing water-based resin and lubricant are as follows: The composition contains a water-soluble styrene-acrylic resin with a glass transition temperature (Tg) of 100°C and an acid value-to-glass transition temperature ratio of 200 (mg-KOH / g) / Tg, and polyethylene wax with a melting point of 130°C and an average particle size of 0.15 μm. Concentration: A paint mixture of 80% by mass of styrene acrylic resin and 20% by mass of polyethylene wax was adjusted with pure water to a solid content concentration of 30% by mass. Therefore, the amount of paint adhering to the steel plate in conditions 3 and 4 was 1.5 g / m² by mass of paint, similar to condition 2. 2 This is the result. The results of the friction coefficient evaluation are shown in Table 1.

[0032] Condition 1 shows the results of a sliding test conducted on GA with a normal oil film applied without using a lubricated steel plate. In contrast, Condition 2 shows the results of a sliding test conducted on GA with a lubricating film formed before the sliding test. Compared to Condition 1, the coefficient of friction is significantly lower, indicating a significant improvement in sliding performance. Condition 3 involves applying an oil film to the GA surface and leaving it in the liquid phase, followed by applying a liquid containing water-based resin and lubricant and leaving it in the liquid phase. The coefficient of friction is lower than in Condition 2, where a lubricating film was formed beforehand, demonstrating excellent sliding performance. Similarly, Condition 4, in which a liquid film containing water-based resin and lubricant is applied to the GA surface and left in the liquid phase, followed by an oil film and leaving it in the liquid phase, also shows lower friction than in Condition 2, where a lubricating film was formed beforehand, demonstrating excellent sliding performance. This indicates that in Conditions 3 and 4, the process of forming a lubricating film beforehand, as in Condition 2, can be omitted, making this a technology that can achieve cost reduction and shorten manufacturing time.

[0033] [Table 1]

[0034] The excellent sliding properties observed under these conditions are thought to be due to the formation of both a liquid film containing a water-based resin and lubricant, as well as an oil film, in a liquid phase between the GA surface and the mold surface.

[0035] In particular, it is believed that the fluid lubrication effect works efficiently because a liquid film containing a water-based resin and lubricant exists on the surface in a liquid phase.

[0036] In Condition 3, applying an oil film to the GA surface and keeping it in the liquid phase, followed by applying a liquid containing a water-based resin and lubricant and keeping it in the liquid phase, results in superior sliding performance compared to Condition 4, where an oil film is applied to the GA surface and kept in the liquid phase, followed by applying an oil film and keeping it in the liquid phase. This is because in Condition 3, the surface roughness of the GA surface is filled in, forming oil reservoirs, and the presence of lubricant at the interface between the mold and the steel plate maximizes performance, resulting in the best sliding performance. In Condition 4, the lubricant is consumed to fill in the surface roughness of the GA surface, and it is possible that only an oil film remains at the interface with the mold in some areas, which may result in slightly inferior sliding performance.

[0037] Furthermore, it is considered that this substance does not essentially mix with liquid films containing water-based resins and lubricants, nor with oil films. A liquid film containing a water-based resin and lubricant. Next, we will describe the application of the present invention to metal sheets. Furthermore, as an example of the application of the present invention to metal sheets, we will describe the application technique for alloyed hot-dip galvanized steel sheets.

[0038] The type of liquid film containing the aqueous resin and lubricant in the present invention is not particularly limited, as long as it is a liquid film that, when present on the surface of a metal plate, exhibits the characteristic of reducing the coefficient of friction compared to when the liquid film containing the aqueous resin and lubricant is not present. Acrylic resins are preferred as the aqueous resin. Acrylic resins can achieve both the role of a binder and good defilm-removing properties. The concentration range of the resin is preferably 1% by mass or more and 50% by mass or less as solid content in the liquid. The aqueous resin can be suitably used whether it is water-soluble or water-dispersible.

[0039] The lubricant preferably contains a wax component. Preferred wax components include polyethylene, polyethylene terephthalate, and polypropylene, with polyethylene being particularly preferred.

[0040] The reason why it is preferable to include a wax component as a lubricant is that wax components have low surface energy and self-lubricating properties, making them easily dispersed in water-based resins that provide good lubrication.

[0041] The preferred concentration range for the wax component is 1% by mass or more and 30% by mass as solid content in the liquid. Below 1% by mass, a sufficient effect in reducing the coefficient of friction cannot be expected. Above 30% by mass, the stability of the liquid may not be achieved.

[0042] The combined concentration of the acrylic resin and the wax component is preferably between 2% by mass and 80% by mass. If it exceeds 80% by mass, the liquid may not be stable.

[0043] In addition to acrylic resins, epoxy, urethane, phenolic, vinyl acetate, and polyester resins can also be used. oil slick The type of oil film in the present invention is not particularly limited, as long as it is an oil film that exhibits the characteristic of reducing the coefficient of friction when present on the surface of a metal plate compared to when no oil film is present. The lubricant that forms the oil film can be commonly used rust-preventive oil, press oil, etc., and may contain additives, not limited to mineral oil or synthetic oil. For example, NOX-RUST (registered trademark) 550 (manufactured by Nippon Parkerizing Co., Ltd.) and similar products can be used. Method for applying liquid and oil films containing water-based resin and lubricant. A liquid film containing a water-based resin and a lubricant, as well as an oil film, may be applied to the surface of a metal sheet being press-formed, or to the surface of a mold used for press-forming.

[0044] Alternatively, a liquid film containing a water-based resin and a lubricant may be applied to the surface of the metal plate, and an oil film may be applied to the surface of the mold used for press molding; or conversely, a liquid film containing a water-based resin and a lubricant may be applied to the surface of the mold used for press molding, and an oil film may be applied to the surface of the metal plate.

[0045] When applying the lubricant to the surface of a die used for press forming, it is necessary to apply the lubricant after each press, either individually or after multiple presses, to ensure that good press formability is achieved. Method for applying a liquid containing a water-based resin and a lubricant, and an oil, to a metal plate. The application of liquids containing water-based resins and lubricants, as well as oils, to metal plates can be done using methods such as roll coating, bar coating, spray coating, electrostatic coating, dipping, sponge coating, or brush coating. The application method is not limited to any specific method. A liquid containing a water-based resin and a lubricant, and a method for applying oil to a mold. The application of liquids containing water-based resins and lubricants, as well as oils, to molds can be done by spraying, electrostatic coating, sponge coating, brush coating, or coating using a mechanism that allows the liquid to seep onto the mold surface. The application method is not limited.

[0046] The average amount of oil adhering to a metal plate or mold is 0.5 g / m². 2 More than 3g / m 2 The following are preferred.

[0047] 0.5g / m 2 Below 3g / m², the lubrication effect may be insufficient. 2 If the level exceeds a certain point, problems arise such as the oil dripping and the lubricating effect becoming saturated.

[0048] The amount of liquid containing water-based resin and lubricant adhering to a metal plate or mold is 0.5 g / m². 2 More than 10g / m 2 The following are preferred.

[0049] 0.5g / m 2 Below 10g / m², the lubricating effect may be insufficient. 2 If the amount is too high, problems arise such as the liquid containing lubricating water resin and lubricant dripping, and the improvement in moldability tends to saturate.

[0050] A more preferable range for the amount of liquid containing a water-based resin and lubricant applied to a metal plate or mold is 1 g / m². 2 More than 5g / m 2 The following applies:

[0051] Here, the amount of a liquid containing a water-based resin and lubricant that adheres to a metal plate can be measured by the change in mass of the coating liquid before and after application. If the mass of the metal plate before and after application of the liquid containing a water-based resin and lubricant can be measured with sufficient accuracy, the amount of adhesion may also be calculated from the difference in mass before and after application. [Examples]

[0052] In the examples, alloyed hot-dip galvanized steel sheets, which are particularly suitable among metal sheets, were used as test materials. Rectangular tube deep drawing We performed deep drawing of a rectangular tube and evaluated its press formability. metal plate material For the test material, we used SGCD4 alloyed hot-dip galvanized steel sheet (JIS G3302:2019) with a tensile strength of 270 MPa, the same material used in the flat plate sliding test, with a thickness of 1.0 mm, and prepared 10 square blanks of 180 mm. Lubrication fluid application conditions The surface oiling and application conditions were the same as those for the flat plate sliding test.

[0053] Figures 3 and 4 show the shape of the mold 11 and the appearance of the molded product. The upper mold measures 100 mm x 100 mm with a radius of 12, and the lower mold measures 104.2 mm x 104.2 mm with a radius of 10. The plate holding force by the blank holder 12 was set to two conditions, 150 kN and 500 kN, and the limit drawing depth at which cracking did not occur and the occurrence of cracks in the vertical walls of the corners were evaluated. The mold stroke speed was set to 28 mm / s.

[0054] The results are shown in Table 2. In rectangular tube deep drawing, a larger limit drawing depth without cracking indicates better deep drawing performance. Conditions 3 and 4, where a liquid containing water-based resin and lubricant was applied to the GA surface and oil was left in the liquid phase, and the lubricated steel sheet in Condition 2, showed significantly better formability than the steel sheet with an oil film applied to the GA surface in Condition 1. Furthermore, in conditions 3 and 4 of the inventive example, when the plate holding force was as high as 500kN, the limit drawing depth was greater than that of the conventionally used lubricated steel sheet in Condition 2, indicating good press formability under more stringent press conditions. In particular, when a lubricating liquid film containing water-based resin and lubricant was applied to the GA surface in Condition 3 after an oil film was applied, the limit drawing depth was even greater compared to when an oil film was applied to the GA surface in Condition 4 after a lubricating liquid film containing water-based resin and lubricant was applied, indicating even better press formability.

[0055] The main deformation modes for press forming of thin sheets include deep drawing, bulging, stretched flange, and bending. However, deep drawing is often required, and the technology of the present invention is a useful technology for press forming.

[0056] [Table 2] [Industrial applicability]

[0057] In the present invention, since there is no lubricating film formed on the surface of the metal sheet that comes into contact with the tool before pressing during the manufacturing of metal press-formed products, high press formability can be achieved without damaging the lubricating film, as would be the case if a lubricating film were formed on the surface of the metal sheet.

[0058] In particular, since the application of a lubricating liquid film to the metal plate can be simplified, press-formed products can be manufactured at a lower cost and in a shorter time compared to conventional techniques that require the formation of a lubricating film in advance. [Explanation of Symbols]

[0059] N pressing load F sliding resistance force 1. Sample for measuring the coefficient of friction 2 Sample stage 3. Slide Table 4 Laura 5. Slide Table Support Base 6. Flat plate sliding test tool 7. First load cell 8. Second load cell 10 square blanks 11 molds 12 Blank Holders

Claims

1. A method for manufacturing a metal press-formed product, characterized in that a liquid film and an oil film are formed between the surface of a metal plate and the surface of a mold during press molding, and the liquid film contains a water-based resin and a lubricant.

2. A method for manufacturing a metal press-formed product according to claim 1, characterized in that a liquid film containing the aqueous resin and lubricant is formed on the oil film formed on the surface of a metal plate.

3. The method for manufacturing a metal press-formed article according to claim 1 or 2, characterized in that the aqueous resin is an acrylic resin.

4. The method for manufacturing a metal press-formed product according to claim 1 or 2, characterized in that the lubricant contains a wax component.

5. The method for manufacturing a metal press-formed product according to claim 3, characterized in that the lubricant contains a wax component.

6. The method for manufacturing a metal press-formed product according to claim 4, characterized in that the concentration range of the acrylic resin is 1% by mass or more and 50% by mass or less as solid content, the concentration range of the wax component is 1% by mass or more and 30% by mass or less as solid content, and the sum of the concentration of the acrylic resin and the concentration of the wax component is 2% by mass or more and 80% by mass or less.

7. The method for manufacturing a metal press-formed product according to claim 5, characterized in that the concentration range of the acrylic resin is 1% by mass or more and 50% by mass or less as solid content, the concentration range of the wax component is 1% by mass or more and 30% by mass or less as solid content, and the sum of the concentration of the acrylic resin and the concentration of the wax component is 2% by mass or more and 80% by mass or less.

8. The average amount of oil film adhering to the metal plate or mold is 0.5 g / m². ２ 3g / m or more ２ The average amount of the aqueous resin and lubricant solution adhering to a metal plate or mold is 0.5 g / m². ２ 10g / m or more ２ A method for manufacturing a metal press-formed article according to claim 1 or 2, characterized in that it is as follows:

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