Medium quenching continuous hot forming process

Abstract

The invention discloses a medium quenching continuous hot forming process which is characterized by comprising the following steps: S1, feeding, loading and positioning coiled materials; s2, uncoiling and flattening; s3, feeding, punching, coining and coding; s4, heating is conducted; s5, hot rolling forming is carried out; s6, medium quenching; and S7, cutting off, and blanking a finished product.

Description

Technical Field

[0001] The invention relates to the technical field of hot forming, and in particular to a medium quenching continuous hot forming process. Background Art

[0002] Currently, in the market, the forming process of profiles mainly adopts cold rolling technology. This process involves using rollers to roll dozens or even hundreds of times to gradually shape it into the desired shape. Since the profile material is hard, for example, to achieve a high strength of more than 1,000 megapascals, it needs to go through many rolling passes. The entire production line may be relatively long. However, the workpiece rebounds significantly after rolling, resulting in a low yield rate and large differences in dimensional accuracy and consistency; therefore, it is very necessary to design a medium quenching continuous hot forming process. Summary of the invention

[0003] The purpose of the present application is to provide a medium quenching continuous hot forming process.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a medium quenching continuous hot forming process, characterized in that it includes the following steps: S1, coil material incoming, loading and positioning; S2, uncoiling and leveling; S3, feeding, punching, embossing and coding; S4, heating; S5, hot roller forming; S6, medium quenching; S7, cutting and finished product blanking.

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

[0006] The step S7 adopts laser cutting or hydraulic cutting.

[0007] The step S4 adopts one or a combination of electromagnetic induction heating, radiation heating, convection heating, resistance heating and particle heating.

[0008] The number of pressing heads used in step S5 is 3-200 groups, and the pressing heads used are ceramic roller pressing heads or ceramic-coated metal roller pressing heads.

[0009] In step S5, the workpiece is formed in a furnace, and the material of the furnace is ceramic or ceramic fiber.

[0010] In step S6, the workpiece is quenched in the quenching chamber by spraying a medium through a multi-point ceramic or metal nozzle.

[0011] In the S6, the workpiece is pressed by a roller or a tool while the medium is quenched.

[0012] 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.

[0013] In summary, the technical effects and advantages of the present invention are as follows: In the present invention, the coil is first heated, then roll-formed, and then quenched, specifically, medium spray quenching, so that the strength of the final product can be increased to three to five times the original cold strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below.

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

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] like Figure 1 As shown, the medium quenching continuous hot forming process includes the following steps: S1, coil material incoming, loading and positioning; S2, uncoiling and leveling; specifically: the coil material needs to be pressed to prevent loose coils, thereby ensuring safe production; S3, feeding punching, embossing and coding; specifically: the equipment used in step S3 is a hydraulic press, a multi-mode hydraulic press or a mechanical servo press to complete one-time punching and marking stamping; S4, heating; S5, hot roller forming; S6, medium quenching; S7, cutting, and finished product blanking.

[0018] Step S2 also includes cutting head butt welding, specifically: closed rectangular laser welding is adopted, which has the advantages of small heat-affected zone and high welding strength.

[0019] In step S7, laser cutting or hydraulic cutting is adopted. In the present embodiment, laser cutting is adopted without tool loss.

[0020] In step S4, one or a combination of electromagnetic induction heating, radiation heating, convection heating, resistance heating and particle heating is adopted; the energy consumption is extremely low.

[0021] The number of pressure heads used in step S5 is 3-200 groups, and the pressure heads used are ceramic roller pressure heads or ceramic-coated metal roller pressure heads. With this structure, the pressure heads are resistant to high temperatures, have low thermal conductivity, small temperature loss and physical loss, zero expansion, resistance to heat shock, high precision, no elasticity, and no deformation. Only 3-200 groups of pressure heads are needed, which is 1 / 2-1 / 10 of the cold rolling pressure of the same workpiece thickness.

[0022] In step S5, the workpiece forming process is performed in the furnace. The material of the furnace is ceramic or ceramic fiber. The furnace has the advantages of high strength, high vibration resistance, no wind erosion, high far-infrared reflectivity, and high electromagnetic wave penetration.

[0023] In step S6, the workpiece is quenched in the quenching chamber by spraying the medium through a multi-point ceramic nozzle or a metal nozzle. With this structure, the ceramic nozzle is resistant to high temperature impact, does not deform, does not clog, and does not produce "hot spots" during continuous uninterrupted production. The temperature of the quenching chamber is constant, the thickness of the liquid flow film on the workpiece surface is small, the thermal boundary layer is small, and the evaporation is extremely fast; at the same time, the nozzle arrangement is reasonable, the strength distribution design of different areas of the workpiece is flexible, and the transition zone is small.

[0024] In S6, rollers or fixtures are used to press the workpiece during media quenching; media spray quenching is used, which can replace traditional methods, such as in the construction industry, where steel plate profiles are usually heated to a red-hot state and then plunged into water, which often causes deformation problems. In contrast, the present invention uses rollers or fixtures to apply pressure during spray quenching, effectively preventing deformation and dimensional deviation, thereby ensuring the accuracy of the product.

[0025] The method used is media quenching, which can be quantitatively controlled. The required parts can be spray quenched as needed to quench the workpiece as a whole or in part. The cooling medium can be water, air, methanol, ethanol, coolant, emulsifier and other media. The original method was to directly throw it into the water without accurately controlling the amount of quenching medium, while the amount of quenching medium can be accurately controlled in this process.

[0026] 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.

[0027] In this embodiment, the material of the workpiece processed by this process is a steel plate. For example, the yield strength of the steel plate in the cold state is 500 MPa. When heated to above 830 degrees, its strength is only 110-120 MPa, so there is no need for dozens or hundreds of rollers in the cold rolling process to roll. Since the material is very soft at this time, ordinary shapes only need a few passes to achieve roll forming, and complex shapes can be rolled in no more than half of the cold rolling passes. After rolling, after spray quenching, the tensile strength can be increased to 2-5 times before forming, that is, 1200-2000 MPa. However, the tensile strength of 1500 MPa is very difficult to achieve with cold rolling, and the rebound is serious, the dimensional accuracy is extremely poor, the scrap rate is very high, the production difficulty is very large, and the production line is very long. In summary, the hot rolling forming of this process has the following advantages over the existing cold rolling or hot stamping.

[0028]

[0029] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A medium quenching continuous hot forming process, characterized in that: The method comprises the following steps: S1, coil material incoming, loading and positioning; S2, uncoiling and leveling; S3, feeding, punching, embossing and coding; S4, heating; S5, hot roller forming; S6, medium quenching; S7, cutting and finished product blanking.

2. A medium quenching continuous hot forming process according to claim 1, characterized in that: The step S2 also includes cutting butt welding.

3. The medium quenching continuous hot forming process according to claim 1, characterized in that: The step S7 adopts laser cutting or hydraulic cutting.

4. A medium quenching continuous hot forming process according to claim 1, characterized in that: The step S4 adopts one or a combination of electromagnetic induction heating, radiation heating, convection heating, resistance heating and particle heating.

5. The medium quenching continuous hot forming process according to claim 1, characterized in that: The number of pressing heads used in step S5 is 3-200 groups, and the pressing heads used are ceramic roller pressing heads or ceramic-coated metal roller pressing heads.

6. The medium quenching continuous hot forming process 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 medium quenching continuous hot forming process according to claim 1, characterized in that: In step S5, the workpiece is quenched in the quenching chamber by spraying a medium through a multi-point ceramic nozzle or a metal nozzle.

8. A medium quenching continuous hot forming process according to claim 7, characterized in that: In the S6, the workpiece is pressed by a roller or a tool while the medium is quenched.

9. The medium quenching continuous hot forming process according to claim 7, 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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