A warm-stamping sheet metal forming method and a sheet metal formed thereby

Abstract

The application is a warm stamping metal plate forming method and a formed metal plate, comprising: cutting the edge of the blank of the metal plate to remove excess material; heating the stamping die according to the characteristics of the metal plate, and warm stamping the blank of the metal plate; trimming the edge of the warm stamping formed metal plate; using a soft die to shape the cold stamping formed metal plate; and CNC processing the shaped metal plate, the beneficial effects of the application are that the blank of the warm stamping formed metal plate is used, the light metal in the metal plate is affected by the temperature, the crystal lattice expansion makes the atomic sliding more easily occur, the applied temperature does not affect the heat treatment of the original metal plate to cause performance degradation, the warm stamping can be maximally imitated, the milling processing amount is reduced, the material utilization rate is increased, the material processing cost and carbon footprint are reduced, and the precision and strength advantages of the milled part are maintained.

Description

[Technical Field]

[0001] This invention relates to the field of warm stamping forming technology, and in particular to a warm stamping metal sheet forming method and the metal sheet formed therefrom. [Background Technology]

[0002] Milled parts made of light metal alloys such as aluminum, magnesium, and titanium have advantages in size, deformation, and strength compared to traditional stamped parts. However, traditional milling processes generate a large amount of metal waste, and light metals have an extremely high carbon footprint during the mineral extraction and reduction process. Therefore, reducing the amount of milling can reduce the carbon footprint and lower processing costs.

[0003] Currently, the blanks for fully milled products are processed by aluminum extrusion, aluminum ingots, forging, etc. These blanks usually differ greatly from the final product size and shape, resulting in a large amount of subsequent milling, which in turn generates a lot of waste and increases the carbon footprint.

[0004] Therefore, there is a need for a blanking method for fully milled metal parts to reduce the amount of milling work and increase the availability of materials, thereby reducing material processing costs and carbon footprint.

[0005] In view of this, it is necessary to provide a warm stamping method for forming metal sheets and the metal sheets formed therefrom to solve the above problems. [Summary of the Invention]

[0006] The technical problem this invention aims to solve is that traditional milling of light metal alloys generates a large amount of metal scrap, and light metals have an extremely high carbon footprint during mineral extraction and reduction. Therefore, reducing the amount of milling can alleviate the carbon footprint and lower processing costs. Currently, fully milled product blanks are processed through aluminum extrusion, aluminum ingots, forging, etc. These blanks usually differ significantly from the final product's dimensions and shape, resulting in a large amount of subsequent milling and thus generating a large amount of scrap, increasing the carbon footprint. Therefore, this invention provides a warm stamping metal sheet forming method and the formed metal sheet to solve the above problems.

[0007] The solution to the technical problem of this invention is: a method for forming metal sheets by warm stamping, comprising:

[0008] S1, Blanking: Cut the edges of the metal sheet blank to remove excess material;

[0009] S2, Warm stamping: The stamping die is heated to 200-350℃ according to the characteristics of the metal sheet, and the blank of the metal sheet is warm stamped. The blank of the warm stamped metal sheet has a thickness of 1.5-5.0mm, so that the metal sheet after warm stamping has the important characteristics of the product (such as curved surface, arc surface, folded edge, side wall).

[0010] S3, Edge trimming: Trimming the edges of metal sheets formed by hot stamping;

[0011] S4, Shaping: Shaping cold-stamped metal sheets using soft molds;

[0012] S5, CNC machining: CNC machining of shaped metal sheets.

[0013] Preferably, in S3, the edges of the warm-stamped metal sheet are first rough-milled using CNC, and then the edges and large openings of the metal sheet are cold-stamped using a stamping die.

[0014] Preferably, the material of the soft mold includes, but is not limited to, sheet metal or bakelite block.

[0015] Preferably, in S5, the shaped metal sheet is first thinned and milled out using CNC rough milling, and then the metal sheet is finished by CNC precision milling.

[0016] Preferably, after CNC machining of the metal sheet, the precision holes of the metal sheet are formed by cold stamping.

[0017] Preferably, the metal sheet is ground, coated, and assembled to form the appearance of the metal sheet.

[0018] In addition, the present invention also provides a metal sheet formed by warm stamping, which is a metal sheet formed by the above method.

[0019] The beneficial effects of this invention are that, through a warm stamping metal sheet forming method and the metal sheet formed therefrom, the raw material for warm stamping metal sheet is used, so that the light metal in the metal sheet is affected by temperature, and the lattice expansion makes it easier for atomic sliding to occur. The applied temperature will not affect the heat treatment of the original metal sheet and cause performance degradation. Moreover, warm stamping can make maximum conformation, reduce milling machining, increase material utilization, thereby reducing material processing costs and carbon footprint, while maintaining the precision and strength advantages of milled parts. [Attached Image Description]

[0020] Figure 1 This is a flowchart of a warm stamping metal sheet forming method according to the present invention.

Detailed Implementation Methods

[0021] To further illustrate the technical means and effects of the present invention, the following detailed description is provided in conjunction with the embodiments of the present invention and their accompanying drawings.

[0022] This invention provides a method for warm stamping metal sheet forming, comprising:

[0023] S1, Blanking: Cut the edges of the metal sheet blank to remove excess material;

[0024] S2, Warm stamping: The stamping die is heated to 200-350℃ according to the characteristics of the metal sheet, and the blank of the metal sheet is warm stamped. The blank of the warm stamped metal sheet has a thickness of 1.5-5.0mm, so that the metal sheet after warm stamping has the important characteristics of the product (such as curved surface, arc surface, folded edge, side wall).

[0025] S3, Edge trimming: Trimming the edges of metal sheets formed by hot stamping;

[0026] S4, Shaping: Shaping cold-stamped metal sheets using soft molds;

[0027] S5, CNC machining: CNC machining of shaped metal sheets.

[0028] In S3, the edges of the warm-stamped metal sheet are first rough-milled using CNC, and then the edges and large openings of the metal sheet are cold-stamped using a stamping die.

[0029] The material of the soft mold includes, but is not limited to, rubber sheets or bakelite blocks.

[0030] In S5, the shaped metal sheet is first thinned and milled out using CNC rough milling, and then the metal sheet is finished by CNC precision milling.

[0031] Among them, after CNC machining of metal sheets, cold stamping is used to form precision holes in the metal sheets.

[0032] This process involves grinding, painting, and assembling metal sheets to create the final appearance of the metal sheet.

[0033] In addition, the present invention also provides a metal sheet formed by warm stamping, which is a metal sheet formed by the above method.

[0034] The beneficial effects of this invention are that, through a warm stamping metal sheet forming method and the metal sheet formed therefrom, the raw material for warm stamping metal sheet is used, so that the light metal in the metal sheet is affected by temperature, and the lattice expansion makes it easier for atomic sliding to occur. The applied temperature will not affect the heat treatment of the original metal sheet and cause performance degradation. Moreover, warm stamping can make maximum conformation, reduce milling machining, increase material utilization, thereby reducing material processing costs and carbon footprint, while maintaining the precision and strength advantages of milled parts.

[0035] It should be noted that the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments based on the technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for forming metal sheets by warm stamping, characterized in that, include: S1, Blanking: Cut the edges of the metal sheet blank to remove excess material; S2, Warm stamping: The stamping die is heated according to the characteristics of the metal sheet, and the blank of the metal sheet is warm stamped and formed. S3, Edge trimming: Trimming the edges of the metal sheet formed by hot stamping; S4, Shaping: The cold-stamped metal sheet is shaped using a soft mold; S5, CNC machining: The metal sheet that has been shaped is CNC machined into its final form.

2. The warm stamping metal sheet forming method as described in claim 1, characterized in that: When hot stamping the metal sheet, the stamping die is heated to 200-350°C according to the characteristics of the metal sheet.

3. The warm stamping metal sheet forming method as described in claim 1, characterized in that: The blank thickness of the metal sheet formed by warm stamping is 1.5 to 5.0 mm.

4. The warm stamping metal sheet forming method as described in claim 1, characterized in that: In S3, the edges of the warm-stamped metal sheet are first rough-milled using CNC, and then the edges and large openings of the metal sheet are cold-stamped using a stamping die.

5. The warm stamping metal sheet forming method as described in claim 1, characterized in that: The material of the soft mold is a rubber sheet or bakelite block.

6. The warm stamping metal sheet forming method as described in claim 1, characterized in that: In S5, the metal sheet that has been shaped is first thinned and milled out by CNC rough milling, and then the metal sheet is finely milled by CNC.

7. The warm stamping metal sheet forming method as described in claim 1, characterized in that: After the metal sheet is CNC machined, the precision holes of the metal sheet are formed by cold stamping.

8. The warm stamping metal sheet forming method as described in claim 1, characterized in that: The metal sheet is polished, coated, and assembled to form the surface of the metal sheet.

9. A metal sheet formed by warm stamping, characterized in that, It is a metal sheet formed by the warm stamping metal sheet forming method as described in any one of claims 1 to 8.

Images