Continuous hot forming process of high-strength light-weight profile

Abstract

The invention discloses a continuous hot forming process of a high-strength light-weight profile, which is characterized by comprising the following specific steps: S1, feeding, loading and positioning a coiled material; s2, uncoiling and flattening; s3, feeding, punching, coining and coding; s4, cold rolling forming is conducted; s5, heating is conducted; s6, medium quenching; s7, carrying out online shot blasting; and S8, cutting off, and blanking a finished product.

Description

Technical Field

[0001] The invention belongs to the technical field of roller pressing and forming, and relates to a continuous hot forming process for high-strength and lightweight profiles. Background Art

[0002] In the current context, the demand for high-strength and lightweight profiles continues to rise in both the automotive and prefabricated construction industries, aiming to achieve the dual goals of reducing weight and increasing strength. The materials of these profiles must meet the requirements of high strength and lightness at the same time, and these two properties are often difficult to coexist. Therefore, it is necessary to design a low-cost continuous hot forming process for high-strength and lightweight profiles to solve the above problems. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, an object of the present invention is to provide a continuous hot forming process for high-strength and lightweight profiles.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a continuous hot forming process of high-strength lightweight profiles, characterized in that it includes the following specific steps: S1, coil material incoming, loading and positioning; S2, unwinding and leveling; S3, feeding, punching, embossing and coding; S4, cold roll forming; S5, heating; S6, medium quenching; S7, online shot peening; S8, cutting, finished product blanking.

[0005] The step S2 also includes cutting head butt welding.

[0006] The step S8 adopts laser cutting or hydraulic cutting.

[0007] The step S5 adopts one or a combination of electromagnetic induction heating, radiation heating, convection heating, resistance heating and particle heating.

[0008] The number of the pressing heads used in step S6 is 3-60 groups, and the pressing heads used are ceramic pressing heads or ceramic coating pressing heads.

[0009] In step S6, the workpiece is formed in a furnace, and the material of the furnace is ceramic or ceramic fiber.

[0010] In step S7, the workpiece is quenched in the quenching chamber by spraying a medium through a multi-point ceramic nozzle or a metal nozzle.

[0011] The step S7 adopts the quenching of the partitioned part or the quenching of the whole workpiece.

[0012] In the S7, the workpiece is pressed by a roller or a tool while the medium is quenched.

[0013] The materials to be processed include, but are not limited to, steel and its alloys, aluminum and its alloys, titanium and its alloys, other metal materials, glass plates, carbon materials, and organic materials.

[0014] By adopting the above technical solution, the beneficial effects of the present invention are: The present invention combines heating, medium quenching and online shot peening to achieve local quenching of the workpiece or quenching of the entire workpiece. During the spray quenching process, the online shot peening technology is implemented to effectively remove rust on the surface, eliminate stress, and significantly improve the surface strength, so that high-strength and lightweight profiles can be finally obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the steps of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the finished product in the present invention. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] like Figure 1 As shown, the continuous hot forming process of the high-strength lightweight profile includes the following specific steps: S1, coil material incoming, loading and positioning; S2, unwinding and leveling; S3, feeding, punching, embossing and coding; S4, cold roll forming; S5, heating; S6, medium quenching; S7, online shot peening; S8, cutting, finished product blanking.

[0019] Step S2 also includes cutting butt welding.

[0020] In step S8, laser cutting or hydraulic cutting is adopted.

[0021] In step S5, one or a combination of more than one of electromagnetic induction heating, radiation heating, convection heating, resistance heating and particle heating is used.

[0022] In step S6, the number of pressing heads used is 3-60 groups, and the pressing heads used are ceramic pressing heads or ceramic coated pressing heads. With this structure, no forming mold is required, and only the pressing heads need to be replaced to change the variety, and the production cost is extremely low.

[0023] In step S6, the workpiece is formed in a furnace, and the material of the furnace is ceramic or ceramic fiber.

[0024] In step S7, the workpiece is quenched in the quenching chamber by spraying the medium through a multi-point ceramic nozzle or a metal nozzle. At the same time, partition quenching can be achieved as needed to solve welding cracking, extend the service life, achieve higher load-bearing capacity of the vehicle, and improve the safety redundant protection structure; low stress structure, reduced maximum dynamic principal strain, improved fatigue strength; vibration reduction and noise reduction effect, reduce vehicle noise, and attenuate vehicle vibration.

[0025] The partitioned local quenching or full workpiece quenching adopted in step S7 can realize longitudinal and transverse hardening by partitioning different parts into soft and hard parts and performing partial surface heat treatment.

[0026] In S7, the workpiece is roller pressed or fixtured while the medium is quenching.

[0027] The medium is evenly sprayed on the surface of the workpiece by a spray, and at the same time, a roller made of ceramic material or ceramic-coated metal material applies pressure to the workpiece. If a steel roller with high thermal conductivity is used, due to its thermal conductivity, the rear of the roller will quickly cool to below 830 degrees as it rolls, resulting in quenching failure, because below this temperature, the metallographic phase of the steel cannot be transformed into martensite. The metal undergoes a phase change during the heating process, from the original ferrite and pearlite state to austenite when heated above 830 degrees. Subsequently, through rapid cooling, at a cooling rate of more than 27 degrees per second, the austenite will be transformed into martensite, giving the material extremely high strength.

[0028] The materials processed include, but are not limited to, steel and its alloys, aluminum and its alloys, titanium and its alloys, other metal materials, glass plates, carbon materials, and organic materials.

[0029] After spray quenching, the online shot blasting technology is implemented to effectively remove surface rust, eliminate uneven stress, and significantly improve surface strength. The speed and force of the shot blasting are extremely strong, enough to correct the deformed parts of the workpiece. After this series of continuous operations, the surface of the workpiece becomes extremely flat and the strength is greatly improved. In addition, due to the compact equipment used in the production process, the yield rate is also improved accordingly.

[0030] In summary, in this embodiment, the processed steel sheet is galvanized steel sheet, and the finished product is as follows: Figure 2As shown in the figure, it is first formed by cold roll forming, then heated, and finally quenched in a medium. This process maintains the characteristics of cold roll forming and does not damage the protective film of the galvanized steel sheet, while greatly improving its strength.

[0031]

[0032] The comparison between hot rolling, cold rolling and hot stamping shows that hot rolling technology not only overturns the traditional cold rolling method, but also has a revolutionary impact on hot stamping technology. By adopting hot rolling, hot stamping can be replaced in some applications.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A continuous hot forming process for high-strength lightweight profiles, characterized in that: The specific steps include: S1, coil material incoming, loading and positioning; S2, unwinding and leveling; S3, feeding, punching, embossing and coding; S4, cold roll forming; S5, heating; S6, medium quenching; S7, online shot peening; S8, cutting, finished product blanking.

2. A continuous hot forming process for high-strength lightweight profiles according to claim 1, characterized in that: The step S2 also includes cutting butt welding.

3. The continuous hot forming process of a high-strength lightweight profile according to claim 1, characterized in that: The step S8 adopts laser cutting or hydraulic cutting.

4. The continuous hot forming process of a high-strength lightweight profile according to claim 1, characterized in that: The step S5 adopts one or a combination of electromagnetic induction heating, radiation heating, convection heating, resistance heating and particle heating.

5. The continuous hot forming process of a high-strength lightweight profile according to claim 1, characterized in that: The number of the pressing heads used in step S6 is 3-60 groups, and the pressing heads used are ceramic pressing heads or ceramic coating pressing heads.

6. The continuous hot forming process of high-strength lightweight profile according to claim 1, characterized in that: In step S6, the workpiece is formed in a furnace, and the material of the furnace is ceramic or ceramic fiber.

7. The continuous hot forming process of high-strength lightweight profile according to claim 1, characterized in that: In step S7, the workpiece is quenched in the quenching chamber by spraying a medium through a multi-point ceramic nozzle or a metal nozzle.

8. The continuous hot forming process of high-strength lightweight profile according to claim 1, characterized in that: The step S7 adopts the quenching of the partitioned part or the quenching of the whole workpiece.

9. The continuous hot forming process of high-strength lightweight profile according to claim 1, characterized in that: In the S7, rollers or other tools are used to press the workpiece while the medium is quenching to prevent the workpiece from deforming.

10. The continuous hot forming process of high-strength lightweight profile according to claim 1, characterized in that: The materials to be processed include, but are not limited to, steel and its alloys, aluminum and its alloys, titanium and its alloys, other metal materials, glass plates, carbon materials, and organic materials.

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