A thin-walled dual-phase steel jco forming device

Abstract

The application discloses a kind of thin-wall dual-phase steel JCO forming equipment, it is related to thin-wall dual-phase steel forming technical field, including forming rack, and the electric cabinet of fixed installation in the left side of forming rack;It further includes: the front of the forming rack is provided with forming mechanism, and forming mechanism contains forming inner cylinder, and forming inner cylinder is the cylindrical structure distribution of outer end open type;Wherein, forming inner cylinder is distributed in the mode of left-right symmetry, and one end of forming inner cylinder is fixedly installed with oil removal brush ring mutually close;The front of the forming rack is provided with pressure mechanism, and pressure mechanism contains pressure die.This thin-wall dual-phase steel JCO forming equipment, by the pressure die and forming inner cylinder in the inside of forming rack, realize the outer cladding, inner support type forming processing of dual-phase steel, and realize lubrication resistance reduction in forming inner cylinder sliding demolding process, simultaneously form lubrication recycling, improve the efficiency of dual-phase steel forming operation.

Description

Technical Field

[0001] This invention relates to the field of thin-walled duplex steel forming technology, specifically to a JCO forming equipment for thin-walled duplex steel. Background Technology

[0002] Thin-walled duplex steel refers to a high-strength steel sheet with a dual-phase microstructure (ferrite + martensite or austenite) and a relatively thin thickness (usually 0.2-4mm). It combines high strength, good plasticity, and excellent cold forming performance. Thin-walled duplex steel has low yield strength and high work hardening rate, making it easy to deform during stamping with low springback. It is suitable for manufacturing complex-shaped components, such as automotive body structural parts, wheels, and safety components. Utilizing its high strength and good plasticity, it is processed into complex-shaped structural parts through processes such as cold stamping, spinning, and hot forming. It is widely used in the automotive, energy, and high-end equipment fields.

[0003] Application CN119076721A discloses a dual-phase steel plate pressing and forming equipment and forming method, including a base, a middle base, a top base and a protective box. The middle base and the top base have a top cavity formed in the middle, and the middle base has a bottom cavity that communicates with the top cavity. Rollers are movably connected to both sides of the top of the top cavity, and a mold is fixed between the two rollers. A driving mechanism is provided on the side of the top cavity to drive the mold to rotate.

[0004] Application CN1151915A discloses a thin-walled steel pipe javelin, forming process and forming equipment. The middle section of the javelin is a round tube, and the transition sections to both ends are tapered tubes with a wall thickness of 0.3-0.5mm. During the processing, the workpiece rotates and rubs against the tapered mold on the outside to generate heat. It is squeezed and stretched at the same time. It is processed in sections using a set of tapered molds, and its ends are forged and formed.

[0005] However, the above-disclosed forming device for thin-walled duplex steel still has the following problems in actual use: the duplex steel is extruded and formed by forming mold, but the thickness and length of such thin-walled duplex steel cannot be uniform during extrusion by forming mold, resulting in differences in the stress and deformation of duplex steel. The bending curvature of some duplex steel is not in place, which leads to concavity, collapse and other situations. After the duplex steel is formed, it is also difficult to demold and unload due to extrusion, which affects the forming efficiency.

[0006] Therefore, we propose a thin-walled duplex steel JCO forming equipment to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a JCO forming equipment for thin-walled duplex steel. This equipment addresses the problems of existing extrusion forming processes for duplex steel using forming dies, where the thickness and length of the thin-walled duplex steel cannot be standardized during extrusion, resulting in variations in stress and deformation. This leads to incomplete bending of some duplex steel, causing concavity, collapse, and other issues. Furthermore, the extrusion process makes demolding and unloading difficult after forming, affecting forming efficiency.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a thin-walled duplex steel JCO forming device, comprising a forming frame and an electrical control box fixedly installed on the left side of the forming frame; further comprising: A forming mechanism is provided on the front top of the forming frame, and the forming mechanism includes a forming inner cylinder, which is distributed in the form of a cylindrical structure with an open outer end. The forming inner cylinders are distributed symmetrically on the left and right, and an oil removal brush ring is fixedly installed at the end of the forming inner cylinders that are close to each other. A pressing mechanism is provided on the lower front side of the forming frame, and the pressing mechanism includes a pressing mold, which is used to press the duplex steel to fully form it inward.

[0009] Preferably, the forming mechanism includes a lifting slide plate, which is slidably installed on the front top of the forming frame. Both the left and right ends of the lifting slide plate are fixedly connected to the lower telescopic part of the lifting cylinder, and the upper end of the lifting cylinder is fixedly connected to the upper end of the forming frame, for driving the lifting slide plate to move up and down to approach the duplex steel.

[0010] Preferably, the forming mechanism includes a bidirectional lead screw rotatably mounted inside the lower end of the lifting slide plate via a bearing, and the left and right ends of the bidirectional lead screw are threaded through and connected to the upper end of the transmission bracket, and the lower end of the transmission bracket is fixedly connected to the outer end of the transmission slide rod, and the inner end of the transmission slide rod is fixedly connected to the inside of the forming inner cylinder.

[0011] Preferably, the forming mechanism includes a positioning bracket, the upper end of which is fixedly connected to the left and right sides of the outer end of the lifting slide plate, the lower end of which is slidably sleeved on the outer end of the forming inner cylinder, and the middle part of which is fixedly connected to the inner end of the lubricating oil cylinder, while a sealing partition is fixedly installed on the inner end of the lubricating oil cylinder.

[0012] Preferably, the forming mechanism includes a lubricating oil pipe, and the inner end of the lubricating oil pipe is connected to the interior of the forming inner cylinder at an equal angle. The inner end of the forming inner cylinder is provided with an oil return ring groove, and the outer side of the oil return ring groove is sleeved and connected to the inner end of the oil removal brush ring. The outer diameter of the oil return ring groove is smaller than the inner diameter of the oil removal brush ring, and the outer wall of the oil removal brush ring is provided with an oil removal brush bristle assembly.

[0013] Preferably, the forming mechanism includes a return oil pipe, and the inner end of the return oil pipe is connected at an equal angle to the return oil ring groove at the inner end of the forming inner cylinder. The right end of the return oil pipe and the right end of the lubricating oil pipe are respectively connected to the inside of the return oil plate and the delivery oil plate. The return oil plate and the delivery oil plate are fixedly installed at the lower end of the transmission bracket.

[0014] Preferably, the forming mechanism includes a main one-way oil inlet pipe that is connected to the outside of the oil delivery pan, and the other end of the main one-way oil inlet pipe is connected to the inside of the outer end of the lubricating oil cylinder. A main one-way oil outlet pipe is connected to the outside of the oil delivery pan, and the other end of the main one-way oil outlet pipe is connected to the inner end of the lubricating oil cylinder. At the same time, a sealing plug rod is slidably connected to the inner end of the lubricating oil cylinder.

[0015] Preferably, the inner end of the sealing plug rod included in the forming mechanism is fixedly connected to the inner end of the transmission bracket, the upper end of the main one-way oil drain pipe is located between the outer end of the sealing plug rod and the sealing partition at the inner end of the lubricating oil cylinder, the upper inner end of the lubricating oil cylinder is connected to the lower end of the auxiliary one-way oil drain pipe, and the upper outer end of the lubricating oil cylinder is connected to the lower end of the auxiliary one-way oil inlet pipe. The upper ends of the auxiliary one-way oil drain pipe and the auxiliary one-way oil inlet pipe are connected to the inside of the oil storage tank, and the oil storage tank is fixedly installed on the upper left and right sides of the lifting slide plate.

[0016] Preferably, the pressing mechanism includes a bearing platform, which is fixedly installed on the front and lower side of the forming frame. Bidirectional hydraulic cylinders are fixedly installed on the left and right sides below the bearing platform. The outer telescopic part of the bidirectional hydraulic cylinder is fixedly connected to the lower end of the pressing mold. At the same time, the pressing mold is slidably installed on the front and rear sides of the top of the bearing platform in a symmetrical manner.

[0017] Preferably, the pressing mechanism includes pressing molds arranged in a semi-circular arc structure, and the semi-circular mechanism on the inner side of the pressing mold and the forming inner cylinder are arranged in a concentric structure. The diameter of the forming inner cylinder is smaller than the diameter of the pressing mold, and the duplex steel is extruded and formed outside the forming inner cylinder and inside the pressing mold.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: This thin-walled duplex steel JCO forming equipment achieves external coating and internal support forming of duplex steel through the pressing mold and forming inner cylinder inside the forming frame, and achieves lubrication and resistance reduction during the sliding demolding process of the forming inner cylinder, while forming a lubrication cycle for recycling, thereby improving the efficiency of duplex steel forming operations. The specific details are as follows: 1. The semi-circular arc structure of the pressing die is distributed with the inner forming cylinder at the same center, ensuring that the duplex steel flips upward and tightly wraps the inner forming cylinder during the extrusion process to form a complete cylinder. This can effectively eliminate defects such as incomplete bending or local depressions. The diameter of the pressing die is larger than that of the inner forming cylinder, providing sufficient deformation space for the duplex steel and ensuring the efficiency of duplex steel forming. 2. The lubricating oil is evenly delivered to the outer wall of the forming inner cylinder through the lubricating oil pipe, which greatly reduces the friction coefficient between the duplex steel and the cylinder, and prevents surface scratches or adhesion during the forming process. The oil return ring groove and the oil removal brush ring work together to scrape off excess oil stains on the inner wall of the duplex steel using the oil removal brush bristle group, ensuring that the surface is clean and free of residue after forming. The oil return pipe draws the scraped lubricating oil into the lubricating oil cylinder for storage, realizing resource recycling. 3. The lubricating oil circulation system relies on the reciprocating motion of the sealing plug rod in the lubricating oil cylinder to realize the automatic replenishment and recovery of lubricating oil. When the transmission bracket slides outward, the sealing plug rod squeezes the lubricating oil and delivers it to the oil delivery plate through the main one-way oil inlet pipe to ensure continuous oil supply during the forming stage; when it slides inward, the excess oil is discharged into the oil storage tank through the auxiliary one-way oil outlet pipe.

[0019] Furthermore, the negative pressure chamber design is linked to the main one-way oil drain pipe and the return oil plate to efficiently suck up residual oil in the return oil ring groove. The oil storage tank is fixed above the lifting slide plate, optimizing the spatial layout and simplifying the pipeline structure. This avoids excessive accumulation of lubricating oil inside the duplex steel and eliminates subsequent processing defects caused by oil residue. At the same time, the auxiliary one-way oil inlet pipe automatically replenishes new oil when the sealing plug rod is reset, maintaining the stability and self-sufficiency of the system in long-term operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the initial state of the formed inner cylinder of the present invention; Figure 3 This is a three-dimensional structural diagram of the lifting slide plate of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a three-dimensional structural diagram of the transmission bracket and positioning bracket of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the sealing plug rod installation structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point C; Figure 9 For the present invention Figure 7 Enlarged structural diagram at point D; Figure 10 This is a schematic diagram of the pressing mold installation structure of the present invention; Figure 11 This is a schematic diagram of the three-dimensional structure of the pressing mold of the present invention.

[0021] In the diagram: 1. Forming frame; 2. Electrical control box; 3. Forming inner cylinder; 4. Degreasing brush ring; 5. Pressing mold; 6. Lifting slide plate; 7. Lifting cylinder; 8. Two-way lead screw; 9. Transmission bracket; 10. Transmission slide bar; 11. Positioning bracket; 12. Lubricating oil cylinder; 13. Sealing partition; 14. Lubricating oil pipe; 15. Return oil pipe; 16. Return oil pan; 17. Oil delivery pan; 18. Main one-way oil inlet pipe; 19. Main one-way oil outlet pipe; 20. Sealing plug rod; 21. Secondary one-way oil outlet pipe; 22. Secondary one-way oil inlet pipe; 23. Oil storage tank; 24. Bearing platform; 25. Two-way hydraulic cylinder; 26. Return oil ring groove; 27. Degreasing brush assembly. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-11 The present invention provides the following technical solution: Example 1: To solve the problems existing in the forming of thin-walled duplex steel, this example discloses the following technical solution: a thin-walled duplex steel JCO forming equipment, including a forming frame 1 and an electrical control box 2 fixedly installed on the left side of the forming frame 1; a forming mechanism is provided on the upper front of the forming frame 1, and the forming mechanism includes a forming inner cylinder 3, and the forming inner cylinder 3 is distributed in a cylindrical structure with an open outer end; wherein, the forming inner cylinder 3 is distributed symmetrically on the left and right, and an oil removal brush ring 4 is fixedly installed on one end of the forming inner cylinder 3 that is close to each other; a pressing mechanism is provided on the lower front of the forming frame 1, and the pressing mechanism includes a pressing mold 5, and the pressing mold 5 is used to extrude the duplex steel to fully form it inward.

[0024] The forming mechanism includes a lifting slide plate 6, which is slidably installed on the front top of the forming frame 1. Both the left and right ends of the lifting slide plate 6 are fixedly connected to the lower telescopic part of the lifting cylinder 7, and the upper end of the lifting cylinder 7 is fixedly connected to the upper end of the forming frame 1, which is used to drive the lifting slide plate 6 to move up and down to approach the duplex steel.

[0025] like Figures 1-2As shown, when duplex steel needs to be formed, the duplex steel is first placed on the top surface of the bearing platform 24 inside the forming frame 1, and positioned by the pressing molds 5 distributed on the front and rear sides. Then, the lifting cylinders 7 on the left and right sides above the forming frame 1 are used for operation. The telescopic part at the lower end of the cylinder drives the fixedly connected lifting slide plate 6 to move downward. The lifting slide plate 6 drives the connected forming inner cylinder 3 to slide downward synchronously through the transmission bracket 9 and the positioning bracket 11, so that the forming inner cylinder 3 fits against the middle of the top surface of the duplex steel and extrudes and positions the duplex steel sheet.

[0026] Example 2: In order to solve the problems existing in the forming of thin-walled dual-phase steel, this example discloses the following technical solution: the pressing mechanism includes a bearing platform 24, and the bearing platform 24 is fixedly installed on the front and lower side of the forming frame 1. Bidirectional hydraulic cylinders 25 are fixedly installed on the left and right sides below the bearing platform 24. The outer telescopic part of the bidirectional hydraulic cylinder 25 is fixedly connected to the lower end of the pressing mold 5. At the same time, the pressing mold 5 is slidably installed on the front and rear sides of the top of the bearing platform 24 in a front-rear symmetrical manner.

[0027] The pressing mechanism includes a pressing mold 5 arranged in a semi-circular arc structure. The semi-circular structure inside the pressing mold 5 and the forming inner cylinder 3 are arranged in a concentric structure. The diameter of the forming inner cylinder 3 is smaller than the diameter of the pressing mold 5. The duplex steel is extruded and formed outside the forming inner cylinder 3 and inside the pressing mold 5.

[0028] like Figures 10-11 As shown, the bidirectional hydraulic cylinder 25 below the bearing platform 24 drives the telescopic part at the outer end to slide inward synchronously. The bidirectional hydraulic cylinder 25 drives the pressing mold 5 connected to the outer end to slide inward synchronously, thereby squeezing the duplex steel on the inner side to flip upward. At the same time, the duplex steel wraps the forming inner cylinder 3 on the upper surface so that the pressing mold 5 can squeeze the duplex steel into a cylindrical structure. The forming inner cylinder 3 supports the duplex steel on the inner side, thereby preventing the duplex steel from denting or bending in the correct position during the forming process.

[0029] Example 3: To solve the problems existing in the forming of thin-walled duplex steel, this example discloses the following technical solution: The forming mechanism includes a bidirectional lead screw 8 rotatably mounted inside the lower end of the lifting slide plate 6 via a bearing, and the left and right ends of the bidirectional lead screw 8 are threaded through and connected to the upper end of the transmission bracket 9. The lower end of the transmission bracket 9 is fixedly connected to the outer end of the transmission slide rod 10, and the inner end of the transmission slide rod 10 is fixedly connected to the inside of the forming inner cylinder 3. The forming mechanism includes a positioning bracket 11, and the upper end of the positioning bracket 11 is fixedly connected to the left and right sides of the outer end of the lifting slide plate 6. The lower end of the positioning bracket 11 is slidably sleeved on the outer end of the forming inner cylinder 3. The middle part of the positioning bracket 11 is fixedly connected to the inner end of the lubricating oil cylinder 12. At the same time, a sealing partition 13 is fixedly installed on the inner end of the lubricating oil cylinder 12.

[0030] The forming mechanism includes a lubricating oil pipe 14, the inner end of which is uniformly connected to the inside of the forming inner cylinder 3. The inner end of the forming inner cylinder 3 is provided with an oil return ring groove 26, and the outer side of the oil return ring groove 26 is sleeved and connected to the inner end of the oil removal brush ring 4. The outer diameter of the oil return ring groove 26 is smaller than the inner diameter of the oil removal brush ring 4. At the same time, the outer wall of the oil removal brush ring 4 is provided with an oil removal bristle assembly 27. The forming mechanism includes an oil return pipe 15, the inner end of which is uniformly connected to the oil return ring groove 26 at the inner end of the forming inner cylinder 3. The right end of the oil return pipe 15 and the right end of the lubricating oil pipe 14 are respectively connected to the inside of the oil return plate 16 and the oil delivery plate 17. The oil return plate 16 and the oil delivery plate 17 are fixedly installed at the lower end of the transmission bracket 9.

[0031] like Figures 4-6 As shown, after the duplex steel is formed, the bidirectional lead screw 8 installed inside the lower part of the lifting slide plate 6 rotates, which drives the transmission brackets 9 and transmission slide rods 10 connected by threads on the left and right sides to slide outward. The transmission slide rods 10 drive the fixedly connected forming inner cylinder 3 to slide outward inside the positioning bracket 11. Then, the transmission bracket 9 drives the fixedly connected sealing plug rod 20 to move into the lubricating oil cylinder 12. The outer end of the sealing plug rod 20 squeezes the lubricating oil inside and outside the lubricating oil cylinder 12, so that the lubricating oil is delivered to the inside of the oil delivery plate 17 through the through-connected main one-way oil inlet pipe 18, and then delivered to the lubricating oil pipe 14 that is connected at equal angles through the oil delivery plate 17. The lubricating oil is delivered to the outside of the forming inner cylinder 3 from the end of the lubricating oil pipe 14 so as to coat the inner wall of the duplex steel, thereby reducing the friction between the duplex steel and the forming inner cylinder 3.

[0032] Furthermore, when the transmission bracket 9 drives the fixedly connected forming inner cylinder 3 and the transmission slide rod 10 to slide outward synchronously, the friction between the forming inner cylinder 3 and the duplex steel is reduced by lubricating oil. When the forming inner cylinder 3 inside the duplex steel moves, the oil removal brush ring 4 at the inner end and the oil removal brush bristle group 27 adhere to the inner wall of the duplex steel to scrape off the excess lubricating oil, so that the excess lubricating oil follows the oil removal brush ring 4 and enters the inner oil return ring groove 26.

[0033] Furthermore, when the moving transmission bracket 9 drives the sealing plug rod 20 to slide outward, the outer end of the sealing plug rod 20 is sealed with the lubricating oil cylinder 12 by the sealing partition 13, thereby making the inner cavity of the lubricating oil cylinder 12 under negative pressure. At the same time, the negative pressure cavity is transmitted to the return oil pipe 15 through the through-connected main one-way oil drain pipe 19 and return oil plate 16, so that the lubricating oil in the return oil ring groove 26 is drawn into the interior of the lubricating oil cylinder 12 for storage through the return oil pipe 15, thereby avoiding excessive lubricating oil adhering inside the duplex steel and affecting subsequent processing operations.

[0034] The forming mechanism includes a main one-way oil inlet pipe 18 that is connected to the outside of the oil supply plate 17, and the other end of the main one-way oil inlet pipe 18 is connected to the inside of the outer end of the lubricating oil cylinder 12. The outside of the oil supply plate 17 is connected to a main one-way oil outlet pipe 19, and the other end of the main one-way oil outlet pipe 19 is connected to the inner end of the lubricating oil cylinder 12. At the same time, a sealing plug rod 20 is slidably connected to the inner end of the lubricating oil cylinder 12.

[0035] The forming mechanism includes a sealing plug rod 20 whose inner end is fixedly connected to the inner end of the transmission bracket 9. The upper end of the main one-way oil drain pipe 19 is located between the outer end of the sealing plug rod 20 and the sealing partition 13 at the inner end of the lubricating oil cylinder 12. The upper inner end of the lubricating oil cylinder 12 is connected to the lower end of the auxiliary one-way oil drain pipe 21. The upper outer end of the lubricating oil cylinder 12 is connected to the lower end of the auxiliary one-way oil inlet pipe 22. The upper ends of the auxiliary one-way oil drain pipe 21 and the auxiliary one-way oil inlet pipe 22 are connected to the inside of the oil storage tank 23. At the same time, the oil storage tank 23 is fixedly installed on the upper left and right sides of the lifting slide plate 6.

[0036] like Figures 7-9As shown, after the forming inner cylinder 3 inside the forming frame 1 separates from the duplex steel, the pressing molds 5 on the front and rear sides slide outward to collect the formed duplex steel. The bidirectional lead screw 8 inside the lifting slide plate 6 drives the transmission bracket 9, the transmission slide rod 10, and the forming inner cylinder 3 to slide inward. The transmission bracket 9 drives the sealing plug rod 20 to slide inward. The lubricating oil between the sealing plug rod 20 and the inner end of the lubricating oil cylinder 12 is squeezed and thus transported to the oil storage tank 23 through the through-connected auxiliary one-way oil drain pipe 21. The outer end of the sealing plug rod 20 slides inward inside the lubricating oil cylinder 12. Then, the outer end of the sealing plug rod 20 drives the outer end cavity of the lubricating oil cylinder 12 to a negative pressure state, thereby drawing the lubricating oil from the oil storage tank 23 through the through-connected auxiliary one-way oil inlet pipe 22 to store it in the outer end cavity inside the lubricating oil cylinder 12 for continued lubrication and demolding operations during subsequent duplex steel forming operations.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A thin-walled duplex steel JCO forming equipment, comprising a forming frame (1) and an electrical control box (2) fixedly installed on the left side of the forming frame (1). Its features are, Also includes: A forming mechanism is provided above the front of the forming frame (1), and the forming mechanism includes a forming inner cylinder (3), and the forming inner cylinder (3) is distributed in a cylindrical structure with an open outer end. Among them, the forming inner cylinder (3) is distributed in a symmetrical manner from left to right, and the oil removal brush ring (4) is fixedly installed at the end of the forming inner cylinder (3) that is close to each other. The forming frame (1) is provided with a pressing mechanism on the lower front side, and the pressing mechanism includes a pressing mold (5), and the pressing mold (5) is used to press the duplex steel to fully form inward.

2. The JCO forming equipment for thin-walled duplex steel according to claim 1, characterized in that: The forming mechanism includes a lifting slide plate (6), which is slidably installed on the front of the forming frame (1). Both the left and right ends of the lifting slide plate (6) are fixedly connected to the lower extension part of the lifting cylinder (7), and the upper end of the lifting cylinder (7) is fixedly connected to the upper end of the forming frame (1) to drive the lifting slide plate (6) to move up and down to approach the duplex steel.

3. The JCO forming equipment for thin-walled duplex steel according to claim 2, characterized in that: The forming mechanism includes a bidirectional lead screw (8) that is rotatably mounted inside the lower end of the lifting slide plate (6) via a bearing. The left and right ends of the bidirectional lead screw (8) are threaded through and connected to the upper end of the transmission bracket (9). The lower end of the transmission bracket (9) is fixedly connected to the outer end of the transmission slide rod (10), and the inner end of the transmission slide rod (10) is fixedly connected to the inside of the forming inner cylinder (3).

4. The JCO forming equipment for thin-walled duplex steel according to claim 3, characterized in that: The forming mechanism includes a positioning bracket (11), the upper end of which is fixedly connected to the left and right sides of the outer end of the lifting slide plate (6), and the lower end of which is slidably sleeved on the outer end of the forming inner cylinder (3). The middle part of the positioning bracket (11) is fixedly connected to the inner end of the lubricating oil cylinder (12), and a sealing partition (13) is fixedly installed on the inner end of the lubricating oil cylinder (12).

5. The JCO forming equipment for thin-walled duplex steel according to claim 1, characterized in that: The forming mechanism includes a lubricating oil pipe (14), and the inner end of the lubricating oil pipe (14) is connected to the inside of the forming inner cylinder (3) at an equal angle. The inner end of the forming inner cylinder (3) is provided with an oil return ring groove (26), and the outer side of the oil return ring groove (26) is sleeved and connected to the inner end of the oil removal brush ring (4). The outer diameter of the oil return ring groove (26) is smaller than the inner diameter of the oil removal brush ring (4), and the outer wall of the oil removal brush ring (4) is provided with an oil removal brush bristle assembly (27).

6. The JCO forming equipment for thin-walled duplex steel according to claim 5, characterized in that: The forming mechanism includes a return oil pipe (15), and the inner end of the return oil pipe (15) is connected at an equal angle to the return oil ring groove (26) at the inner end of the forming inner cylinder (3). The right end of the return oil pipe (15) and the right end of the lubricating oil pipe (14) are respectively connected to the inside of the return oil plate (16) and the delivery oil plate (17). The return oil plate (16) and the delivery oil plate (17) are fixedly installed at the lower end of the transmission bracket (9).

7. The JCO forming equipment for thin-walled duplex steel according to claim 6, characterized in that: The forming mechanism includes a main one-way oil inlet pipe (18) that is connected to the outside of the oil delivery pan (17), and the other end of the main one-way oil inlet pipe (18) is connected to the inside of the outer end of the lubricating oil cylinder (12). The outside of the oil delivery pan (17) is connected to a main one-way oil outlet pipe (19), and the other end of the main one-way oil outlet pipe (19) is connected to the inner end of the lubricating oil cylinder (12). At the same time, a sealing plug rod (20) is slidably connected to the inner end of the lubricating oil cylinder (12).

8. The JCO forming equipment for thin-walled duplex steel according to claim 7, characterized in that: The inner end of the sealing plug rod (20) included in the forming mechanism is fixedly connected to the inner end of the transmission bracket (9). The upper end of the main one-way oil drain pipe (19) is located between the outer end of the sealing plug rod (20) and the sealing partition (13) at the inner end of the lubricating oil cylinder (12). The upper inner end of the lubricating oil cylinder (12) is connected to the lower end of the auxiliary one-way oil drain pipe (21). The upper outer end of the lubricating oil cylinder (12) is connected to the lower end of the auxiliary one-way oil inlet pipe (22). The upper ends of the auxiliary one-way oil drain pipe (21) and the auxiliary one-way oil inlet pipe (22) are connected to the inside of the oil storage tank (23). At the same time, the oil storage tank (23) is fixedly installed on the upper left and right sides of the lifting slide plate (6).

9. The JCO forming equipment for thin-walled duplex steel according to claim 1, characterized in that: The pressing mechanism includes a bearing platform (24), which is fixedly installed on the front side of the forming frame (1). A bidirectional hydraulic cylinder (25) is fixedly installed on both the left and right sides below the bearing platform (24). The outer end extension part of the bidirectional hydraulic cylinder (25) is fixedly connected to the lower end of the pressing mold (5). At the same time, the pressing mold (5) is slidably installed on the front and rear sides of the top of the bearing platform (24) in a front-back symmetrical manner.

10. A JCO forming apparatus for thin-walled duplex steel according to claim 9, characterized in that: The pressing mechanism includes a pressing mold (5) arranged in a semi-circular arc structure, and the semi-circular structure inside the pressing mold (5) and the forming inner cylinder (3) are arranged in a concentric structure. The diameter of the forming inner cylinder (3) is smaller than the diameter of the pressing mold (5), and the duplex steel is extruded and formed outside the forming inner cylinder (3) and inside the pressing mold (5).

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