High specific strength high elongation 6-series aluminum alloy crash beam and method of making the same

Abstract

The application discloses a high specific strength high-elongation 6-series aluminum alloy anti-collision beam, which comprises a base, the upper side walls of the base are symmetrically fixedly connected with vertical plates, the opposite sides of the two vertical plates are fixedly connected with support plates, the upper side walls of the two support plates are fixedly connected with a smelting furnace, a stirring mechanism is arranged on the smelting furnace, a feeding port is formed in the upper side wall of the smelting furnace, and arc-shaped blocks are arranged on the inner bottom wall of the smelting furnace. The anti-collision beam combines the advantages of 6082 alloy and 7003 alloy, has good extrusion forming performance, the strength is greater than 340 MPa, the elongation is greater than or equal to 15%, and the elongation is improved by more than 10% compared with the 6082 alloy. The rare earth rhenium is added to refine the grains and improve the alloy strength, and the 6-series profile is subjected to double-stage aging strengthening, so that the elongation of the alloy is further improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of aluminum alloy profile processing technology, in particular to a high-specific-strength high-elongation 6-series aluminum alloy anti-collision beam and a preparation method thereof. BACKGROUND

[0002] Automobile lightening is a future development trend, in recent years, the market of aluminum alloy anti-collision beams is continuously expanding, and the aluminum alloy anti-collision beams replace traditional steel anti-collision beams.

[0003] Currently, the aluminum alloy anti-collision beams commonly used in the market mainly include 6082 and 7003 alloys. The 6082 anti-collision beam has good extrusion forming performance, but the strength is less than 310 MPa, and the elongation rate is only 8-12%. The 7003 anti-collision beam has good strength advantage, but the extrudability is poor, the service life of the die is short in the production process, and the defective rate of the extruded profile size is high.

[0004] Therefore, the application provides a high-specific-strength high-elongation 6-series aluminum alloy anti-collision beam and a preparation method thereof. SUMMARY

[0005] The application aims at solving the problems in the background art and provides a high-specific-strength high-elongation 6-series aluminum alloy anti-collision beam and a preparation method thereof.

[0006] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme.

[0007] The application provides a high-specific-strength high-elongation 6-series aluminum alloy anti-collision beam, which comprises a base, the upper side wall of the base is symmetrically and fixedly connected with vertical plates, the opposite sides of the two vertical plates are fixedly connected with support plates, the upper side walls of the two support plates are fixedly connected with a smelting furnace, the smelting furnace is provided with a stirring mechanism, the upper side wall of the smelting furnace is provided with a feeding port, the inner bottom wall of the smelting furnace is provided with an arc-shaped block, the opposite sides of the two vertical plates are fixedly connected with connecting plates located below the two support plates, the opposite ends of the two connecting plates are fixedly connected with a refining furnace, a discharging pipe with a solenoid valve is connected between the lower side wall of the smelting furnace and the refining furnace, the left inner wall of the refining furnace is fixedly and insertingly provided with an air inlet pipe extending to the outside of the refining furnace, the lower side wall of the refining furnace is fixedly and symmetrically connected with fixed plates, the opposite sides of the two fixed plates are fixedly and symmetrically connected with a material guide plate matched with the refining furnace, the upper side wall of the base is provided with a filter box matched with the material guide plate, the right side wall of the vertical plate on the right side is provided with a feeding mechanism, the upper side wall of the base is provided with a casting mechanism, and the left side wall of the vertical plate on the left side is fixedly connected with a control panel.

[0008] Preferably, the stirring mechanism comprises a support rod fixedly connected to the top wall of the smelting furnace, an end of the support rod is fixedly connected with a motor one, a driving end of the motor one is fixedly connected with a transmission rod extending into the smelting furnace, a plurality of stirring rods are fixedly connected to the outer wall of the transmission rod in a symmetrical manner, and each of the stirring rod and the transmission rod is made of high-temperature-resistant metal material.

[0009] Preferably, the feeding mechanism comprises a motor two fixedly connected to the right side of the vertical plate, a driving end of the motor two is fixedly connected with a belt pulley one, a screw rod below the motor two is rotatably connected to the left side of the vertical plate on the right side, a bracket is fixedly connected to the left side wall of the vertical plate on the right side, a top end of the bracket is fixedly connected with a feeding plate on the left side of the screw rod, a guide rod is fixedly connected to the left side wall of the vertical plate on the right side, a limiting plate is fixedly connected to the left end of the guide rod, and a push plate is threadedly connected to the outer wall of the screw rod and simultaneously sleeved on the outer wall of the guide rod.

[0010] Preferably, a bearing is embedded in the left side of the vertical plate, the inner ring of the bearing is fixedly connected with the outer wall of the screw rod, and three through holes are formed in the left side wall of the feeding plate and matched with the push plate.

[0011] Preferably, the casting mechanism comprises two vertical plates fixedly connected to the upper side wall of the base, the top ends of the two vertical plates are fixedly connected with a mounting plate, a casting furnace is installed on the upper side wall of the base and located between the two vertical plates, a mold is installed on the inner bottom wall of the casting furnace, a hydraulic cylinder is fixedly connected to the lower side wall of the mounting plate, a moving rod extending into the casting furnace is fixedly connected to the end of the hydraulic cylinder away from the mounting plate, and a pressing plate is fixedly connected to the lower end of the moving rod.

[0012] Preferably, temperature sensors are installed on the inner walls of the smelting furnace, the refining furnace and the casting furnace.

[0013] Preferably, a PLC controller is arranged in the control panel, and the PLC controller, the smelting furnace, the temperature sensors, the refining furnace, the motor one, the motor two, the hydraulic cylinder and the casting furnace are electrically connected.

[0014] A preparation method of a high-specific-strength high-elongation 6-series aluminum alloy anti-collision beam comprises the following steps:

[0015] S1: smelting aluminum alloy according to mass fraction: sequentially adding intermediate alloys such as aluminum ingot, aluminum-silicon intermediate alloy and aluminum-manganese intermediate alloy into a smelting furnace for smelting. The smelting temperature is set to 720-760℃, after the ingredients are completely melted, a slagging agent is scattered for slagging, and stirring is performed for more than twice. When the temperature rises to 730-750℃, magnesium ingot and rhenium are pressed into the melt, and stirring is performed;

[0016] S2: The obtained melt is guided into the refining furnace through the downcomer, argon is used to pass the refining agent into the melt for refining, then slagging is performed, and the melt purification treatment is completed;

[0017] S3: The obtained melt is heated to 750-770 DEG C, then is placed for 30 min, then the melt is guided into the filter box through the guide plate to further complete the melt purification. At the same end of the filter box, the aluminum-titanium-boron wire is uniformly melted into the aluminum melt through the feeding mechanism;

[0018] S4: The obtained melt is cast at a casting speed of 100-130 mm / min, and the cooling water flow is controlled at 60-90 L / min;

[0019] S5: The obtained ingot is heated to 500-520 DEG C, the casting furnace temperature is controlled at 400-420 DEG C, the special die for anti-collision beam is used, the profile speed is 5-10 m / min, and the online quenching extrusion production is performed, and the online cooling intensity is greater than or equal to 5 DEG C / s.

[0020] S6: The obtained profile is subjected to aging treatment, the heating temperature is 80-110 DEG C, the holding time is 3-5 h, then the temperature is continuously increased to 150-170 DEG C, the holding time is 9-10 h, and air cooling is performed after discharging.

[0021] Compared with the prior art, the high specific strength high elongation 6 series aluminum alloy anti-collision beam has the following advantages:

[0022] 1. The melting furnace and the stirring mechanism are arranged, the ingredients are proportioned according to the mass fraction, and the aluminum alloy is melted: the intermediate alloy such as aluminum ingot, aluminum-silicon intermediate alloy and aluminum-manganese intermediate alloy is sequentially added into the melting furnace for melting. The melting temperature is set at 720-760 DEG C, after the ingredients are completely melted, the slagging agent is scattered for slagging, and stirring is performed for more than twice. When the temperature rises to 730-750 DEG C, the magnesium ingot and rhenium are pressed into the melt and are stirred, the motor in the stirring mechanism drives the transmission rod and the stirring rod to rotate, which can accelerate the uniform mixing of the slagging agent, magnesium and rhenium;

[0023] 2、 Set the refining furnace and filter box, the melt obtained through the downcomer melt into the refining furnace, using argon into the melt refining agent into the melt, after the slag, complete melt purification treatment. The melt obtained by heating to 750 DEG C-770 DEG C, and then stand for 30 min, then the melt through the guide plate into the filter box, degassing tank, further complete melt purification. At the same time in the filter box front, through the feeding mechanism into the aluminum melt aluminum titanium boron wire evenly, the aluminum wire, titanium wire and boron wire are inserted into the through hole in the feeding plate, start motor two, the driving end of motor two belt pulley one clockwise rotation, thus driving pulley two and screw clockwise rotation, and then drive the push plate to the left, the push plate extrusion contact aluminum wire, titanium wire and boron wire, the aluminum wire, titanium wire and boron wire push into the melt, complete the feeding operation, thereby improving the performance of the melt;

[0024] 3、 Set the casting mechanism, the melt after filtering is placed in the mold in the casting furnace, start the hydraulic cylinder and control the temperature, make the hydraulic cylinder drive the moving rod and the pressing plate to move downward, thus complete the stamping forming operation, and then complete the preparation of the aluminum alloy crash beam;

[0025] In summary, the crash beam of the application combines the advantages of 6082 alloy and 7003 alloy, not only has good extrusion forming performance, but also has a strength of > 340MPa and an elongation of ≥15%, which is more than 10% higher than that of 6082 alloy. By adding rare earth rhenium to refine the grains and improve the strength of the alloy, and by strengthening the 6 series profile through double aging, the elongation of the alloy is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A structure diagram of a high specific strength and high elongation 6 series aluminum alloy crash beam and a preparation method thereof are provided.

[0027] Figure 2 A Figure 1 An enlarged view of A in the middle;

[0028] Figure 3 A side view of the connection between the feeding plate and the through hole in a high specific strength and high elongation 6 series aluminum alloy crash beam and a preparation method thereof are provided.

[0029] Figure 4 A perspective view of the guide plate in a high specific strength and high elongation 6 series aluminum alloy crash beam and a preparation method thereof are provided.

[0030] In the figure: 1 base, 2 vertical plate, 3 support plate, 4 smelting furnace, 5 arc block, 6 support rod, 7 motor one, 8 transmission rod, 9 stirring rod, 10 temperature sensor, 11 feeding port, 12 connecting plate, 13 refining furnace, 14 discharging pipe, 15 guide plate, 16 fixed plate, 17 support, 18 feeding plate, 19 motor two, 20 pulley one, 21 screw rod, 22 pulley two, 23 push plate, 24 guide rod, 25 limit plate, 26 filter box, 27 through hole, 28 vertical plate, 29 mounting plate, 30 casting furnace, 31 mold, 32 hydraulic cylinder, 33 moving rod, 34 pressing plate, 35 control panel. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0033] Reference Figures 1-4 A high specific strength and high elongation 6-series aluminum alloy crash beam, comprising a base 1, the upper side wall of the base 1 is symmetrically and fixedly connected with a vertical plate 2, the opposite side of each of the two vertical plates 2 is fixedly connected with a support plate 3, the upper side wall of each of the two support plates 3 is fixedly connected with a smelting furnace 4, the smelting furnace 4 is provided with a stirring mechanism, the stirring mechanism comprises a support rod 6 fixedly connected to the top wall of the smelting furnace 4, the end of the support rod 6 is fixedly connected with a motor one 7, the driving end of the motor one 7 is fixedly connected with a transmission rod 8 extending into the smelting furnace 4, the outer wall of the transmission rod 8 is symmetrically fixedly connected with a plurality of stirring rods 9, each of the stirring rod 9 and the transmission rod 8 is made of high-temperature-resistant metal material;

[0034] The upper side wall of the smelting furnace 4 is provided with an inlet 11, and the inner bottom wall of the smelting furnace 4 is provided with an arc block 5. The opposite side of each of the two vertical plates 2 is fixedly connected with a connecting plate 12 below the two supporting plates 3. The opposite ends of the two connecting plates 12 are fixedly connected with a refining furnace 13. A discharge pipe 14 with a solenoid valve is connected between the lower side wall of the smelting furnace 4 and the refining furnace 13. A gas inlet pipe extending to the outside of the refining furnace 13 is fixedly inserted into the left side inner wall of the refining furnace 13. The lower side wall of the refining furnace 13 is fixedly connected with two fixed plates 16. The opposite side of each of the two fixed plates 16 is fixedly connected with a material guide plate 15 matched with the refining furnace 13. The upper side wall of the base 1 is provided with a filter box 26 matched with the material guide plate 15. The right side wall of the right vertical plate 2 is provided with a feeding mechanism;

[0035] The feeding mechanism comprises a motor two 19 fixedly connected to the right vertical plate 2. The driving end of the motor two 19 is fixedly connected with a belt pulley one 20. The left side of the right vertical plate 2 is rotatably connected with a lead screw 21 below the motor two 19. The left side wall of the right vertical plate 2 is fixedly connected with a bracket 17. The top end of the bracket 17 is fixedly connected with a feeding plate 18 on the left side of the lead screw 21. The left side wall of the right vertical plate 2 is fixedly connected with a guide rod 24. The left end of the guide rod 24 is fixedly connected with a limiting plate 25. The outer wall of the lead screw 21 is threadedly connected with a push plate 23 which is simultaneously slidably sleeved on the outer wall of the guide rod 24. The left side of the vertical plate 2 is fixedly embedded with a bearing. The inner ring of the bearing is fixedly connected with the outer wall of the lead screw 21. The left side wall of the feeding plate 18 is provided with three through holes 27 matched with the push plate 23.

[0036] The upper side wall of the base 1 is provided with a casting mechanism. The casting mechanism comprises two vertical plates 28 fixedly connected to the upper side wall of the base 1. The top ends of the two vertical plates 28 are fixedly connected with a mounting plate 29. The upper side wall of the base 1 is provided with a casting furnace 30 between the two vertical plates 28. The inner bottom wall of the casting furnace 30 is provided with a mold 31. The lower side wall of the mounting plate 29 is fixedly connected with a hydraulic cylinder 32. The end of the hydraulic cylinder 32 away from the mounting plate 29 is fixedly connected with a moving rod 33 extending into the inside of the casting furnace 30. The lower end of the moving rod 33 is fixedly connected with a pressing plate 34. The inner walls of the smelting furnace 4, the refining furnace 13 and the casting furnace 30 are provided with temperature sensors 10. The left side wall of the left vertical plate 2 is fixedly connected with a control panel 35. The inside of the control panel 35 is provided with a PLC controller. The PLC controller, the smelting furnace 4, the temperature sensors 10, the refining furnace 13, the motor one 7, the motor two 19, the hydraulic cylinder 32 and the casting furnace 30 are electrically connected.

[0037] According to the mass fraction, the aluminum alloy is smelted: the intermediate alloy such as aluminum ingot, aluminum silicon intermediate alloy and aluminum manganese intermediate alloy is sequentially added to the smelting furnace 4 for smelting. The smelting temperature is set at 720-760 DEG C, after the ingredients are completely melted, the slagging agent is scattered for slagging, and more than twice stirring is carried out. When the temperature rises to 730-750 DEG C, the magnesium ingot and rhenium are pressed into the melt and stirring is carried out, the motor 7 in the stirring mechanism drives the transmission rod 8 and the stirring rod 9 to rotate, which can accelerate the uniform mixing of the slagging agent, magnesium and rhenium, and the obtained melt is guided into the refining furnace 13 through the discharge pipe 14, the refining agent is introduced into the melt using argon for refining, and then the slagging is carried out, and the melt purification treatment is completed. The obtained melt is heated to 750-770 DEG C, and then is placed for 30 min, and then the melt is guided into the filtering box 26 and the degassing box through the guide plate 15, and the melt purification is further completed;

[0038] Meanwhile, the aluminum titanium boron wire is uniformly melted into the aluminum melt through the feeding mechanism in front of the filtering box 26, the aluminum wire, titanium wire and boron wire are respectively inserted into the through hole 27 on the feeding plate 18, the motor two 19 is started, the driving end of the motor two 19 drives the belt pulley one 20 to rotate clockwise, thereby driving the belt pulley two 22 and the lead screw 21 to rotate clockwise, and then driving the push plate 23 to move leftwards, so that the push plate 23 extrudes and contacts the aluminum wire, titanium wire and boron wire, and the aluminum wire, titanium wire and boron wire are pushed into the melt, and the feeding operation is completed, thereby improving the performance of the melt. The filtered melt is placed in the mold 31 in the casting furnace 30, the hydraulic cylinder 32 is started and the temperature is controlled, the hydraulic cylinder 32 drives the moving rod 33 and the pressing plate 34 to move downwards, thereby completing the punch forming operation, and then the preparation of the aluminum alloy crash beam is completed. The crash beam of the application combines the advantages of 6082 alloy and 7003 alloy, not only has good extrusion forming performance, but also has a strength of > 340 MPa and an elongation of ≥ 15%, which is more than 10% higher than that of 6082 alloy. By adding rare earth rhenium to refine the grain, the alloy strength is improved, and the 6 series profile is strengthened by double-stage aging, thereby further improving the elongation of the alloy.

[0039] A preparation method of a high specific strength and high elongation 6 series aluminum alloy crash beam, comprising the following steps:

[0040] S1: according to the mass fraction, the aluminum alloy is smelted: the intermediate alloy such as aluminum ingot, aluminum silicon intermediate alloy and aluminum manganese intermediate alloy is sequentially added to the smelting furnace 4 for smelting. The smelting temperature is set at 720-760 DEG C, after the ingredients are completely melted, the slagging agent is scattered for slagging, and more than twice stirring is carried out. When the temperature rises to 730-750 DEG C, the magnesium ingot and rhenium are pressed into the melt and stirring is carried out;

[0041] S2: the obtained melt is guided into the refining furnace 13 through the discharge pipe 14, the refining agent is introduced into the melt using argon for refining, and then the slagging is carried out, and the melt purification treatment is completed;

[0042] S3: The obtained melt is heated to 750-770 DEG C, and then is placed for 30 min, and then the melt is introduced into the filtering box 26 through the material guide plate 15 to further complete the melt purification. Meanwhile, the aluminum titanium boron wire is evenly melted into the aluminum melt through the feeding mechanism in front of the filtering box 26;

[0043] S4: The obtained melt is casted, the casting speed is 100-130 mm / min, and the cooling water flow is controlled to be 60-90 L / min;

[0044] S5: The obtained ingot is heated to 500-520 DEG C, the casting furnace 30 temperature is controlled to be 400-420 DEG C, the special mold 31 for anti-collision beam is adopted, the profile speed is 5-10 m / min, and the online quenching extrusion production is carried out, and the online cooling intensity is greater than or equal to 5 DEG C / s.

[0045] S6: 7) The obtained profile is aged, the heating temperature is 80-110 DEG C, the holding time is 3-5 h, then the temperature is continuously increased to 150-170 DEG C, the holding time is 9-10 h, and after discharging, air cooling is carried out.

[0046] Further, the fixed connection is broadly understood unless otherwise specifically defined and limited, for example, can be welding, or gluing, or integrally formed, and the like, which is well known to those skilled in the art.

[0047] The operation principle of the present application is described as follows:

[0048] In use, the quality fraction is proportioned, the aluminum alloy is smelted, the aluminum ingot, the aluminum silicon intermediate alloy, the aluminum manganese intermediate alloy and the like intermediate alloy are sequentially added into the smelting furnace 4 for smelting. The smelting temperature is set to be 720-760 DEG C, after the ingredients are completely melted, the slagging agent is scattered for slagging, and the stirring is carried out for more than twice. When the temperature is increased to 730-750 DEG C, the magnesium ingot and the rhenium are pressed into the melt, and the stirring is carried out, the motor 7 in the stirring mechanism drives the transmission rod 8 and the stirring rod 9 to rotate, which can accelerate the uniform mixing of the slagging agent, the magnesium and the rhenium, the obtained melt is introduced into the refining furnace 13 through the downcomer 14, the argon is used to introduce the refining agent into the melt for refining, and then the slagging is carried out, and the melt purification treatment is completed. The obtained melt is heated to 750-770 DEG C, and then is placed for 30 min, and then the melt is introduced into the filtering box 26, the degassing box through the material guide plate 15 to further complete the melt purification;

[0049] Meanwhile, the aluminum-titanium-boron wires are evenly melted into the aluminum melt by the feeding mechanism in front of the filter box 26, the aluminum wire, the titanium wire and the boron wire are respectively inserted into the through hole 27 on the feeding plate 18, the motor two 19 is started, the driving end of the motor two 19 drives the belt pulley one 20 to rotate clockwise, thereby driving the belt pulley two 22 and the lead screw 21 to rotate clockwise, and further driving the push plate 23 to move leftwards, so that the push plate 23 extrudes and contacts the aluminum wire, the titanium wire and the boron wire, the aluminum wire, the titanium wire and the boron wire are pushed into the melt, and the feeding operation is completed, thereby improving the performance of the melt. The filtered melt is placed in the mold 31 in the casting furnace 30, the hydraulic cylinder 32 is started and the temperature is controlled, the hydraulic cylinder 32 drives the moving rod 33 and the pressing plate 34 to move downwards, thereby completing the stamping forming operation, and further completing the preparation of the aluminum alloy anti-collision beam. The anti-collision beam of the present application combines the advantages of 6082 alloy and 7003 alloy, not only has good extrusion forming performance, but also has a strength of > 340 MPa and an elongation of ≥ 15%, which is more than 10% higher than that of 6082 alloy. The grain is refined by adding rare earth rhenium, the alloy strength is improved, the 6 series profile is strengthened by double-stage aging, and the elongation of the alloy is further improved.

[0050] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A method for preparing a high-specific-strength, high-elongation 6-series aluminum alloy anti-collision beam, characterized in that, The preparation device adopted includes a base (1), the upper side wall of the base (1) is symmetrically and fixedly connected with vertical plates (2), the opposite sides of the two vertical plates (2) are fixedly connected with support plates (3), the upper side walls of the two support plates (3) are commonly fixedly connected with a smelting furnace (4), the smelting furnace (4) is provided with a stirring mechanism, the upper side wall of the smelting furnace (4) is provided with a feeding port (11), the inner bottom wall of the smelting furnace (4) is provided with an arc block (5), the opposite sides of the two vertical plates (2) are fixedly connected with connecting plates (12) located below the two support plates (3), the opposite ends of the two connecting plates (12) are commonly fixedly connected with a refining furnace (13), the lower side wall of the smelting furnace (4) and the refining furnace (13) are connected with a discharging pipe (14) provided with an electromagnetic valve, the left inner wall of the refining furnace (13) is fixedly and inserted with an air inlet pipe extending to the outside of the refining furnace (13), the lower side wall of the refining furnace (13) is symmetrically and fixedly connected with fixed plates (16), the opposite sides of the two fixed plates (16) are commonly fixedly connected with a material guide plate (15) matched with the refining furnace (13), the upper side wall of the base (1) is provided with a filter box (26) matched with the material guide plate (15), the right side wall of the right vertical plate (2) is provided with a feeding mechanism, the upper side wall of the base (1) is provided with a casting mechanism, the left side wall of the left vertical plate (2) is fixedly connected with a control panel (35); The feeding mechanism comprises a motor two (19) fixedly connected to the right vertical plate (2), a belt pulley one (20) fixedly connected to the driving end of the motor two (19), a lead screw (21) rotatably connected to the left side of the right vertical plate (2) below the motor two (19), a support (17) fixedly connected to the left side wall of the right vertical plate (2), an upper feeding plate (18) fixedly connected to the top of the support (17) and located to the left of the lead screw (21), a guide rod (24) fixedly connected to the left side wall of the right vertical plate (2), a limiting plate (25) fixedly connected to the left end of the guide rod (24), and a push plate (23) threadedly connected to the outer wall of the lead screw (21) and simultaneously sleeved on the outer wall of the guide rod (24); A bearing is fixedly embedded in the left side of the vertical plate (2), the inner ring of the bearing is fixedly connected with the outer wall of the lead screw (21), and the left side wall of the upper feeding plate (18) is provided with three through holes (27) matched with the push plate (23); aluminum wires, titanium wires and boron wires are respectively inserted into the through holes (27) on the upper feeding plate (18); The preparation of the anti-collision beam comprises the following steps: S1: smelting aluminum alloy according to the mass fraction: adding intermediate alloys such as aluminum ingots, aluminum-silicon intermediate alloys and aluminum-manganese intermediate alloys into the smelting furnace (4) in sequence for smelting; the smelting temperature is set to 720-760 DEG C, after the ingredients are completely melted, a slagging agent is scattered for slagging, and more than two times of stirring is performed; when the temperature rises to 730-750 DEG C, magnesium ingots and rhenium are pressed into the melt, and stirring is performed; S2: the obtained melt is guided into the refining furnace (13) through the downcomer (14), argon is used to introduce the refining agent into the melt for refining, then slagging is performed, and the melt purification treatment is completed; S3: the obtained melt is heated to 750-770 DEG C, then is placed for 30 min, then is guided into the filter box (26) through the guide plate (15), and the melt purification is further completed; meanwhile, the aluminum-titanium-boron wire is uniformly melted into the aluminum melt through the feeding mechanism in front of the filter box (26); S4: the obtained melt is subjected to casting, the casting speed is 100-130 mm / min, and the cooling water flow is controlled to be 60-90 L / min; S5: the obtained ingot is heated to 500-520 DEG C, the casting furnace (30) is controlled to be at a temperature of 400-420 DEG C, the anti-collision beam special mold (31) is adopted, the profile speed is 5-10 m / min, and the online quenching extrusion production is performed, and the online cooling intensity is greater than or equal to 5 DEG C / s; S6: the obtained profile is subjected to aging treatment, the heating temperature is 80-110 DEG C, the holding time is 3-5 h, then the temperature is continuously increased to 150-170 DEG C, the holding time is 9-10 h, and air cooling is performed after discharging.

2. The method for preparing a high specific strength, high elongation 6-series aluminum alloy anti-collision beam according to claim 1, characterized in that, The stirring mechanism comprises a support rod (6) fixedly connected to the top wall of the smelting furnace (4), an electric machine one (7) fixedly connected to the end of the support rod (6), a transmission rod (8) fixedly connected to the driving end of the electric machine one (7) and extending into the smelting furnace (4), and a plurality of stirring rods (9) fixedly connected to the outer wall of the transmission rod (8) in a symmetrical manner, wherein each of the stirring rod (9) and the transmission rod (8) is made of a high-temperature-resistant metal material.

3. The method of claim 1, wherein the method is characterized by: The casting mechanism comprises two vertical plates (28) fixedly connected to the upper side wall of the base (1), an installation plate (29) fixedly connected to the top ends of the two vertical plates (28), a casting furnace (30) installed on the upper side wall of the base (1) and located between the two vertical plates (28), a mold (31) installed on the inner bottom wall of the casting furnace (30), a hydraulic cylinder (32) fixedly connected to the lower side wall of the installation plate (29), and a moving rod (33) fixedly connected to the end of the hydraulic cylinder (32) away from the installation plate (29) and extending into the casting furnace (30), wherein the lower end of the moving rod (33) is fixedly connected to a pressing plate (34).

4. The method for preparing a high specific strength, high elongation 6-series aluminum alloy anti-collision beam according to claim 3, characterized in that, Temperature sensors (10) are installed on the inner walls of the smelting furnace (4), the refining furnace (13) and the casting furnace (30).

5. The method for preparing a high specific strength, high elongation 6-series aluminum alloy anti-collision beam according to claim 4, characterized in that, A PLC controller is arranged in the control panel (35), and the PLC controller, the smelting furnace (4), the temperature sensor (10), the refining furnace (13), the electric machine one (7), the electric machine two (19), the hydraulic cylinder (32) and the casting furnace (30) are electrically connected.

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