Aluminum profile extrusion die and extrusion forming method thereof

Abstract

The invention belongs to the technical field of extrusion dies, and discloses an aluminum profile extrusion die and an extrusion forming method thereof.The aluminum profile extrusion die comprises a feeding die, a forming die is arranged at one end of the feeding die, an adjusting mechanism is installed in the feeding die, a limiting mechanism is installed at the bottom end of the adjusting mechanism, and wavy buffering lines are formed in the bottom end of a welding chamber; through cooperation of structures such as a first connecting rod, a flow guide block and a welding chamber, the hole diameter of a flow dividing hole is changed when the position of the flow guide block moves, then the flow speed of metal is adjusted, the flow speed of the metal is more uniform before the metal enters the welding chamber, and the flow guide block is moved upwards to increase the hole diameter of the flow dividing hole and adjust the angle of the flow dividing hole; according to the metal welding device, more metal is guided to flow to the area, on the contrary, for parts with small requirements, wave-shaped buffering lines are arranged at the bottom end of the welding chamber, the flow speed of the metal is slowed down, the metal is more evenly gathered and welded, stress concentration is reduced, and therefore the purpose that the device can adapt to materials of different shapes to be adjusted conveniently is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of extrusion dies, and specifically relates to an aluminum profile extrusion die and an extrusion forming method thereof. Background Technique

[0002] In terms of the strength of the welding line, due to the large difference in metal flow of each part of the complex-section aluminum profile, it is difficult to fundamentally solve the problem only by adjusting the temperature and speed, resulting in unstable welding line strength, far less than 90% of the matrix strength, which affects the mechanical properties and reliability of the product.

[0003] Patent No. CN109848237B discloses an upper die of a hollow aluminum profile extrusion die, including an upper die steel sleeve, a diverter, and a die core installed on the diverter; the diverter bridges are in a cross shape, the die core is arranged at the cross position of the diverter bridges, and axial screw holes are provided at the outer ends of the diverter bridges; the upper die steel sleeve is in a cylindrical shape, and a groove corresponding to each diverter bridge is recessed and formed on the lower end surface of the upper die steel sleeve. Each diverter bridge is embedded in the corresponding groove, and a gap is left between each diverter bridge and the bottom surface of the corresponding groove. A radial screw hole is provided on the bottom surface of the groove along the radial direction of the upper die steel sleeve, and a screw is provided in the radial screw hole. The screw is screwed into the axial screw hole to fix the diverter bridge. The die core can be fixed by tightening the screw, and the installation is convenient and fast. When the die core is offset, each screw can be adjusted in time for correction. When the die core or the diverter bridge is damaged, a new die core can be replaced by loosening the screw. Not only is the replacement speed fast, but also the economic loss caused by the scrapping of the entire die can be avoided.

[0004] However, when this device is used, it cannot solve the problem that the welding line strength of high-complex-section aluminum profiles is difficult to stably reach more than 90% of the matrix strength. By optimizing the die structure and extrusion process, the metal flows evenly, the stress concentration is reduced, and the welding quality is improved. And when discharging, if there is a distance between the material after extrusion and the height of the conveying device, it will cause slight changes in the shape of the formed material. Summary of the Invention To solve the problems raised in the above background technique, the present invention provides an aluminum profile extrusion die and an extrusion forming method thereof.

[0005] To achieve the above object, the present invention provides the following technical solution: An aluminum profile extrusion die, including a feeding die, one end of the feeding die is provided with a forming die, a diversion hole is opened at one end of the feeding die, an adjusting mechanism is installed inside the feeding die, a limiting mechanism is installed at the bottom end of the adjusting mechanism, a heightening mechanism is fixed outside the forming die, a welding chamber is opened at one end of the forming die, and a wavy buffer pattern is opened at the bottom end of the welding chamber; The adjusting mechanism includes a first connecting rod, a diversion block, and an extension hole. The first connecting rod is movably connected inside the feeding die, a diversion block is fixed at the bottom end of the first connecting rod, and an extension hole is opened inside the feeding die; The limiting mechanism includes a mounting seat, a third connecting rod, and a first limiting disc. The mounting seat is fixed to the bottom end inside the diversion block. A third connecting rod is fixed to the top end of the mounting seat, and a first limiting disc is fixed to the top end of the third connecting rod. The heightening mechanism includes a support bar, a bidirectional screw, and a heightening plate. The support bar is fixed to the outside of the forming die. A bidirectional screw is rotatably connected inside the support bar, and a heightening plate is threadedly connected to the outside of the bidirectional screw.

[0006] Preferably, a second connecting rod is movably connected inside the first connecting rod. A trigger block is fixed to the outside of the second connecting rod. A first limiting block is movably connected inside the diversion block. A first return spring is fixed to the top end of the trigger block. Three limiting grooves are formed inside the feeding die. A second limiting spring is fixed inside the feeding die, and a return plate is fixed to the outside of the second limiting spring.

[0007] Preferably, the first connecting rod is slidably connected to the feeding die. The diameter of the diversion block is equal to the diameter of the extension hole. The extension hole is formed at the top end of the diversion hole. An arc surface is formed at one end of the extension hole. The outer wall of the second connecting rod fits the inner wall of the first connecting rod, and the first connecting rod and the second connecting rod are slidably connected.

[0008] Preferably, a slope is formed at the bottom end of the trigger block. The first limiting block slides inside the diversion block. A slope is formed at the top end of the first limiting block. There are two groups of the first limiting blocks, and the first limiting blocks are symmetrically distributed about the central axis of the trigger block. The first limiting block and the trigger block are slidably connected.

[0009] Preferably, the first return spring is used to squeeze the trigger block and keep it in a tendency to move upward. There are three groups of the second limiting springs and the return plates, and the second limiting springs and the return plates are symmetrically distributed about the central axis of the first connecting rod. The second limiting spring is used to squeeze the return plate and keep it in a tendency to move outward.

[0010] Preferably, a second limiting disc is sleeved on the outside of the third connecting rod. A limiting rod is movably connected inside the second connecting rod. A third return spring is sleeved on the outside of the limiting rod, and a second limiting block is fixed to the outside of the limiting rod.

[0011] Preferably, the inner wall of the second limiting disc fits the outer wall of the third connecting rod, and the second limiting disc and the third connecting rod are slidably connected. The diameter of the second limiting disc is larger than the diameter of the first limiting disc.

[0012] Preferably, two sets of limiting rods are provided, which are symmetrically distributed about the central axis of the second connecting rod. The limiting rods are slidably connected to the second connecting rod. The third return spring is used to squeeze the limiting rods and the second limiting block and keep them in a moving trend inward. One end of the second limiting block is provided with an inclined surface.

[0013] Preferably, two sets of support bars are provided and are symmetrically distributed about the central axis of the forming die.

[0014] The present invention also provides an extrusion forming method for an aluminum profile extrusion die, including the following steps: S1. Before installing the die into the machine table, according to the metal demand of different parts of the profile, adjust the positions of the first connecting rod and the flow guiding block at each part, so that when the position of the flow guiding block moves, the aperture of the shunt hole is changed, thereby adjusting the metal flow rate, making the metal flow rate more uniform before entering the welding chamber. For the part with a large metal demand, move the flow guiding block upward to increase the aperture of the shunt hole and adjust its angle to guide more metal to flow to this area, and vice versa for the part with a small demand; S2. After moving the position of the flow guiding block, press the second connecting rod, so that the second connecting rod drives the trigger block to move downward, and then squeeze the two first limiting blocks through the shape of the trigger block, so that the first limiting blocks spread to both sides, and then squeeze the two return plates on both sides, so that the two sets of return plates contract inward. At this time, the two first limiting blocks are stuck in the limiting grooves; S3. At the same time, when the second connecting rod moves downward, make the first limiting disc contact with the second limiting block. After the second limiting block is squeezed by the first limiting disc, it contracts inward, so that the first limiting disc passes through. After the first limiting disc passes through, the third return spring resets the second limiting block, so that the second limiting block is located at the bottom end of the first limiting disc, thereby limiting the first limiting disc and the second connecting rod, fixing the positions of the second connecting rod and the trigger block, making the first limiting block stably located in the limiting groove, and then fixing the positions of the first connecting rod and the flow guiding block; S4. When it is necessary to remove or adjust the height of the flow guiding block, continue to press the second connecting rod, so that the second limiting disc contacts the second limiting block. After the second limiting block is squeezed by the second limiting disc, it contracts inward, so that the second limiting disc passes through. After the second limiting disc passes through, the third return spring resets the second limiting block. At this time, the second limiting block jacks up the second limiting disc, so that the second limiting disc is combined with the first limiting disc, and at this time the second limiting disc is no longer limited. Pull back the second connecting rod by the restoring force of the first return spring. The two first limiting blocks are no longer squeezed by the trigger block, and the second limiting spring is pushed back by the two return plates, and then the first limiting block is pushed back. At this time, the height of the flow guiding block and the metal flow rate can be readjusted; S5. By setting wavy buffer lines at the bottom of the welding chamber, the flow rate of the metal is slowed down, enabling the metal to converge and weld more evenly, reducing stress concentration. Moreover, by adjusting the height of the padding plate with a bidirectional screw, when there is a height difference between the material after extrusion and discharge and the conveying device, the material can be elevated by the padding plate at this time, making the material fall into the conveying device more smoothly and reducing the probability of deformation. S6. After the adjustment of the mold is completed, during extrusion, a step-by-step extrusion method is adopted. First, preliminary extrusion is carried out at a relatively low pressure to initially fill the complex cavity with metal, and then the pressure is gradually increased to further compact and weld the metal. At the same time, after each extrusion, local stress relief treatment is performed on the mold using thermal aging treatment. The mold is heated to an appropriate temperature and maintained for a certain period of time to eliminate the stress generated by extrusion, improve the strength of the welding line, reduce the damage to the mold caused by stress, and extend the service life of the mold.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation of structures such as the first connecting rod, the diversion block, and the welding chamber, the device of the present invention can adjust the positions of the first connecting rod and the diversion block at each part according to the metal demand at different parts of the profile. When the position of the diversion block moves, the aperture of the diversion hole changes, thereby adjusting the metal flow rate and making the metal flow rate more uniform before entering the welding chamber. For parts with a large metal demand, the diversion block is moved upward to increase the aperture of the diversion hole and adjust its angle to guide more metal to flow to this area, and vice versa for parts with a small demand. In addition, wavy buffer lines are set at the bottom of the welding chamber to slow down the metal flow rate, enable the metal to converge and weld more evenly, and reduce stress concentration, so as to achieve the purpose of facilitating the device to adapt to different-shaped materials for adjustment.

[0016] Through the cooperation of structures such as the mounting seat, the third connecting rod, and the first limiting disc, when the second connecting rod moves downward, the first limiting disc contacts the second limiting block. After the second limiting block is squeezed by the first limiting disc, it contracts inward to allow the first limiting disc to pass through. After the first limiting disc passes through, the third reset spring resets the second limiting block, making the second limiting block located at the bottom of the first limiting disc, thereby limiting the first limiting disc and the second connecting rod, fixing the positions of the second connecting rod and the trigger block, and enabling the first limiting block to be stably located in the limiting groove, and then fixing the positions of the first connecting rod and the diversion block. When disassembling, continue to press, so as to achieve the purpose of facilitating the device to limit the positions of the first connecting rod and the diversion block after adjustment.

[0017] Through the cooperation of structures such as support bars, bidirectional screws, and elevation plates, the device of the present invention can adjust the height of the elevation plate through the bidirectional screw. When there is a distance between the material after extrusion and discharge and the height of the conveying device, the material can be elevated by the elevation plate at this time, making the material fall into the conveying device more smoothly and reducing the probability of deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic right view of the overall structure of the present invention; Figure 3 It is an exploded schematic diagram of the overall structure of the present invention; Figure 4 It is an exploded right view schematic diagram of the overall structure of the present invention; Figure 5 It is a schematic cross-sectional structure diagram of the feed die of the present invention; Figure 6 For the present invention Figure 5 Enlarged partial cross-sectional structure diagram at position A in; Figure 7 It is a schematic diagram of the adjustment mechanism structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged partial cross-sectional structure diagram at position B in; Figure 9 It is a schematic diagram of the elevation mechanism structure of the present invention.

[0019] In the figure: 1, feed die; 2, forming die; 3, shunt hole; 4, welding chamber; 5, adjustment mechanism; 501, first connecting rod; 502, diversion block; 503, extension hole; 504, second connecting rod; 505, trigger block; 506, first limit block; 507, first return spring; 508, second limit spring; 509, return plate; 6, limit mechanism; 601, mounting seat; 602, third connecting rod; 603, first limit disk; 604, second limit disk; 605, limit rod; 606, third return spring; 607, second limit block; 7, elevation mechanism; 701, support bar; 702, bidirectional screw; 703, elevation plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Such asFigures 1 to 9 As shown in the figure, the present invention provides an aluminum profile extrusion die, which includes a feeding die 1. One end of the feeding die 1 is provided with a forming die 2. A diversion hole 3 is opened at one end of the feeding die 1. An adjusting mechanism 5 is installed inside the feeding die 1. A limiting mechanism 6 is installed at the bottom end of the adjusting mechanism 5. A heightening mechanism 7 is fixed outside the forming die 2. A welding chamber 4 is opened at one end of the forming die 2. A wavy buffer pattern is opened at the bottom end of the welding chamber 4.

[0022] As Figures 1 to 9 shown in the figure, the adjusting mechanism 5 includes a first connecting rod 501, a diversion block 502 and an extension hole 503. The first connecting rod 501 is movably connected inside the feeding die 1. A diversion block 502 is fixed at the bottom end of the first connecting rod 501. An extension hole 503 is opened inside the feeding die 1. A second connecting rod 504 is movably connected inside the first connecting rod 501. The first connecting rod 501 is slidably connected with the feeding die 1. The diameter of the diversion block 502 is equal to the diameter of the extension hole 503. The extension hole 503 is opened at the top end of the diversion hole 3. An arc surface is opened at one end of the extension hole 503. The outer wall of the second connecting rod 504 fits the inner wall of the first connecting rod 501. The first connecting rod 501 and the second connecting rod 504 are slidably connected.

[0023] As Figures 1 to 9 shown in the figure, a trigger block 505 is fixed outside the second connecting rod 504. A first limiting block 506 is movably connected inside the diversion block 502. An inclined surface is opened at the bottom end of the trigger block 505. The first limiting block 506 slides inside the diversion block 502. An inclined surface is opened at the top end of the first limiting block 506. There are two groups of the first limiting blocks 506. The first limiting blocks 506 are symmetrically distributed about the central axis of the trigger block 505. The first limiting block 506 and the trigger block 505 are slidably connected. A first return spring 507 is fixed at the top end of the trigger block 505. Three groups of limiting grooves are opened inside the feeding die 1. A second limiting spring 508 is fixed inside the feeding die 1. A return plate 509 is fixed outside the second limiting spring 508. The first return spring 507 is used to squeeze the trigger block 505 and keep it in a moving trend upward. There are three groups of the second limiting springs 508 and the return plates 509. The second limiting springs 508 and the return plates 509 are symmetrically distributed about the central axis of the first connecting rod 501. The second limiting springs 508 are used to squeeze the return plates 509 and keep them in a moving trend outward.

[0024] Adopting the above solution: After moving the position of the diversion block 502, press the second connecting rod 504, so that the second connecting rod 504 drives the trigger block 505 to move downward. Then, due to the shape of the trigger block 505, it squeezes the two first limiting blocks 506, causing the first limiting blocks 506 to spread to both sides, and further squeezing the two restoring plates 509 on both sides, making the two groups of restoring plates 509 contract inward. At this time, the two groups of first limiting blocks 506 are clamped into the limiting grooves, thereby fixing the positions of the first connecting rod 501 and the diversion block 502.

[0025] As Figures 1 to 9 shown, the limiting mechanism 6 includes a mounting seat 601, a third connecting rod 602, and a first limiting disc 603. The mounting seat 601 is fixed to the bottom end inside the diversion block 502. The top end of the mounting seat 601 is fixed with the third connecting rod 602. The top end of the third connecting rod 602 is fixed with the first limiting disc 603. A second limiting disc 604 is sleeved outside the third connecting rod 602. A limiting rod 605 is movably connected inside the second connecting rod 504. A third restoring spring 606 is sleeved outside the limiting rod 605. A second limiting block 607 is fixed outside the limiting rod 605. The inner wall of the second limiting disc 604 fits the outer wall of the third connecting rod 602. The second limiting disc 604 and the third connecting rod 602 are slidably connected. The diameter of the second limiting disc 604 is larger than the diameter of the first limiting disc 603. There are two groups of limiting rods 605, and the limiting rods 605 are symmetrically distributed about the central axis of the second connecting rod 504. The limiting rods 605 and the second connecting rod 504 are slidably connected. The third restoring spring 606 is used to squeeze the limiting rod 605 and the second limiting block 607 and keep them in a moving trend inward. One end of the second limiting block 607 is provided with an inclined surface.

[0026] Adopting the above solution: When the second connecting rod 504 moves downward, the first limiting disc 603 contacts the second limiting block 607. After the second limiting block 607 is squeezed by the first limiting disc 603, it contracts inward, allowing the first limiting disc 603 to pass through. After the first limiting disc 603 passes through, the third restoring spring 606 resets the second limiting block 607, making the second limiting block 607 located at the bottom end of the first limiting disc 603, thereby limiting the first limiting disc 603 and the second connecting rod 504, fixing the positions of the second connecting rod 504 and the trigger block 505, making the first limiting block 506 stably located in the limiting groove, and further fixing the positions of the first connecting rod 501 and the diversion block 502.

[0027] As Figures 1 to 9 shown, the heightening mechanism 7 includes a support bar 701, a bidirectional screw 702, and a heightening plate 703. The support bar 701 is fixed to the outside of the forming die 2. The support bar 701 is rotatably connected with a bidirectional screw 702 inside. The heightening plate 703 is threadedly connected to the outside of the bidirectional screw 702. There are two groups of support bars 701, which are symmetrically distributed about the central axis of the forming die 2.

[0028] Adopting the above solution: The height of the elevation plate 703 is adjusted by the bi-directional screw 702. When there is a distance between the material after extrusion and discharge and the height of the conveying device, the material can be elevated by the elevation plate 703 at this time, so that the material falls into the conveying device more smoothly, reducing the probability of deformation.

[0029] The present invention also provides an extrusion molding method for an aluminum profile extrusion die, including the following steps: S1. Before installing the die into the machine table, according to the metal demand of different parts of the profile, adjust the positions of the first connecting rod 501 and the flow guiding block 502 of each part, so that when the position of the flow guiding block 502 moves, the aperture of the shunt hole 3 is changed, thereby adjusting the metal flow rate, making the metal flow rate more uniform before entering the welding chamber 4. For the parts with large metal demand, move the flow guiding block 502 upward to increase the aperture of the shunt hole 3 and adjust its angle to guide more metal to flow to this area, and vice versa for the parts with small demand; S2. After moving the position of the flow guiding block 502, press the second connecting rod 504, so that the second connecting rod 504 drives the trigger block 505 to move downward, and then the shape of the trigger block 505 extrudes the two first limiting blocks 506, causing the first limiting blocks 506 to spread to both sides, and then squeezing the two restoring plates 509 on both sides, making the two groups of restoring plates 509 contract inward. At this time, the two groups of first limiting blocks 506 are clamped into the limiting grooves; S3. At the same time, when the second connecting rod 504 moves downward, the first limiting disc 603 contacts the second limiting block 607. After being squeezed by the first limiting disc 603, the second limiting block 607 contracts inward, allowing the first limiting disc 603 to pass through. After the first limiting disc 603 passes through, the third reset spring 606 resets the second limiting block 607, making the second limiting block 607 located at the bottom of the first limiting disc 603, thereby limiting the first limiting disc 603 and the second connecting rod 504, fixing the positions of the second connecting rod 504 and the trigger block 505, making the first limiting block 506 stably located in the limiting groove, and further fixing the positions of the first connecting rod 501 and the flow guiding block 502; S4. When it is necessary to remove or adjust the height of the flow guiding block 502, continue to press the second connecting rod 504 so that the second limiting disc 604 contacts the second limiting block 607. After the second limiting block 607 is extruded by the second limiting disc 604, it contracts inwardly to allow the second limiting disc 604 to pass through. After the second limiting disc 604 passes through, the third return spring 606 returns the second limiting block 607 to its original position. At this time, the second limiting block 607 jacks up the second limiting disc 604 so that the second limiting disc 604 is joined with the first limiting disc 603, and at this time, the second limiting disc 604 is no longer limited. The second connecting rod 504 is pulled back by the restoring force of the first return spring 507. The two groups of first limiting blocks 506 are no longer extruded by the trigger block 505, and the second limiting spring 508 is jacked back by the two groups of restoring plates 509, thereby jacking back the first limiting block 506. At this time, the height of the flow guiding block 502 and the metal flow rate can be readjusted; S5. By providing wavy buffer lines at the bottom of the welding chamber 4, the metal flow rate is slowed down, enabling the metal to converge and weld more evenly, reducing stress concentration. Also, the height of the heightening plate 703 is adjusted by the bidirectional screw 702. When there is a height difference between the material after extrusion and discharge and the conveying device, the heightening plate 703 can be used to raise the material at this time, making it smoother for the material to fall into the conveying device and reducing the probability of deformation; S6. After the adjustment of the mold is completed, during extrusion, a hierarchical extrusion method is adopted. First, preliminary extrusion is carried out at a relatively low pressure to allow the metal to initially fill the complex cavity, and then the pressure is gradually increased to further compact and weld the metal. At the same time, after each extrusion, local stress relief treatment is performed on the mold using thermal aging treatment. The mold is heated to an appropriate temperature and maintained for a certain period of time to eliminate the stress generated by extrusion, improve the strength of the welding line, reduce the damage to the mold caused by stress, and extend the service life of the mold.

[0030] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An aluminum profile extrusion die, including a feeding die (1), characterized in that: One end of the feeding die (1) is provided with a forming die (2). A diversion hole (3) is opened at one end of the feeding die (1). An adjusting mechanism (5) is installed inside the feeding die (1). A limiting mechanism (6) is installed at the bottom end of the adjusting mechanism (5). A heightening mechanism (7) is fixed to the outside of the forming die (2). A welding chamber (4) is opened at one end of the forming die (2). Wave-shaped buffer lines are opened at the bottom end of the welding chamber (4). The adjusting mechanism (5) includes a first connecting rod (501), a diversion block (502) and an extension hole (503). The first connecting rod (501) is movably connected inside the feeding die (1). A diversion block (502) is fixed to the bottom end of the first connecting rod (501). An extension hole (503) is opened inside the feeding die (1). The limiting mechanism (6) includes a mounting seat (601), a third connecting rod (602) and a first limiting disc (603). The mounting seat (601) is fixed to the bottom end inside the diversion block (502). A third connecting rod (602) is fixed to the top end of the mounting seat (601). A first limiting disc (603) is fixed to the top end of the third connecting rod (602). The heightening mechanism (7) includes a support bar (701), a bidirectional screw (702) and a heightening plate (703). The support bar (701) is fixed to the outside of the forming die (2). A bidirectional screw (702) is rotatably connected inside the support bar (701). A heightening plate (703) is threadedly connected to the outside of the bidirectional screw (702).

2. The aluminum profile extrusion die according to claim 1, wherein: A second connecting rod (504) is movably connected inside the first connecting rod (501). A trigger block (505) is fixed to the outside of the second connecting rod (504). A first limiting block (506) is movably connected inside the diversion block (502). A first return spring (507) is fixed to the top end of the trigger block (505). Three limiting grooves are opened inside the feeding die (1). A second limiting spring (508) is fixed inside the feeding die (1). A return plate (509) is fixed to the outside of the second limiting spring (508).

3. The aluminum profile extrusion die according to claim 2, wherein: The first connecting rod (501) is slidably connected to the feeding die (1). The diameter of the diversion block (502) is equal to the diameter of the extension hole (503). The extension hole (503) is opened at the top end of the diversion hole (3). An arc surface is opened at one end of the extension hole (503). The outer wall of the second connecting rod (504) fits against the inner wall of the first connecting rod (501). The first connecting rod (501) is slidably connected to the second connecting rod (504).

4. The aluminum profile extrusion die according to claim 2, wherein: An inclined surface is opened at the bottom end of the trigger block (505). The first limiting block (506) slides inside the diversion block (502). An inclined surface is opened at the top end of the first limiting block (506). There are two groups of the first limiting blocks (506). The first limiting blocks (506) are symmetrically distributed about the central axis of the trigger block (505). The first limiting block (506) is slidably connected to the trigger block (505).

5. The aluminum profile extrusion die according to claim 2, wherein: The first return spring (507) is used to squeeze the trigger block (505) and keep it in an upward moving tendency. There are three sets of the second limiting springs (508) and the return plates (509). The second limiting springs (508) and the return plates (509) are symmetrically distributed about the central axis of the first connecting rod (501). The second limiting springs (508) are used to squeeze the return plates (509) and keep them in an outward moving tendency.

6. The aluminum profile extrusion die according to claim 2, wherein: A second limiting disc (604) is sleeved outside the third connecting rod (602). A limiting rod (605) is movably connected inside the second connecting rod (504). A third return spring (606) is sleeved outside the limiting rod (605). A second limiting block (607) is fixed outside the limiting rod (605).

7. The aluminum profile extrusion die according to claim 6, wherein: The inner wall of the second limiting disc (604) fits the outer wall of the third connecting rod (602). The second limiting disc (604) and the third connecting rod (602) are slidably connected. The diameter of the second limiting disc (604) is larger than the diameter of the first limiting disc (603).

8. The aluminum profile extrusion die according to claim 6, characterized in that: There are two sets of the limiting rods (605). The limiting rods (605) are symmetrically distributed about the central axis of the second connecting rod (504). The limiting rods (605) and the second connecting rod (504) are slidably connected. The third return spring (606) is used to squeeze the limiting rods (605) and the second limiting blocks (607) and keep them in an inward moving tendency. An inclined surface is formed at one end of the second limiting block (607).

9. The aluminum profile extrusion die according to claim 1, characterized in that: There are two sets of the support bars (701) symmetrically distributed about the central axis of the forming die (2).

10. A method for extrusion forming of an aluminum profile extrusion die, using an aluminum profile extrusion die as described in claims 1-9, characterized in that: Including the following steps: S1. Before installing the die into the machine table, according to the metal demand of different parts of the profile, adjust the positions of the first connecting rod (501) and the diversion block (502) at each part, so that when the position of the diversion block (502) moves, the aperture of the diversion hole (3) changes, thereby adjusting the metal flow rate and making the metal flow rate more uniform before entering the welding chamber (4). For the parts with large metal demand, move the diversion block (502) upward to increase the aperture of the diversion hole (3) and adjust its angle to guide more metal to flow to this area. For the parts with small demand, do the opposite. S2. After moving the position of the diversion block (502), press the second connecting rod (504) to drive the trigger block (505) to move downward, and then squeeze the two first limiting blocks (506) through the shape of the trigger block (505), so that the first limiting blocks (506) spread to both sides, and then squeeze the return plates (509) on both sides, so that the two return plates (509) contract inward. At this time, the two first limiting blocks (506) are clamped into the limiting grooves. S3. At the same time, when the second connecting rod (504) moves downward, the first limiting disc (603) contacts the second limiting block (607). After the second limiting block (607) is squeezed by the first limiting disc (603), it contracts inward, allowing the first limiting disc (603) to pass through. After the first limiting disc (603) passes through, the third return spring (606) returns the second limiting block (607) to its original position, causing the second limiting block (607) to be located at the bottom end of the first limiting disc (603), thereby limiting the first limiting disc (603) and the second connecting rod (504), fixing the positions of the second connecting rod (504) and the trigger block (505), enabling the first limiting block (506) to be stably located in the limiting groove, and further fixing the positions of the first connecting rod (501) and the diversion block (502); S4. When it is necessary to remove or adjust the height of the diversion block (502), continue to press the second connecting rod (504) so that the second limiting disc (604) contacts the second limiting block (607). After the second limiting block (607) is squeezed by the second limiting disc (604), it contracts inward, allowing the second limiting disc (604) to pass through. After the second limiting disc (604) passes through, the third return spring (606) returns the second limiting block (607) to its original position. At this time, the second limiting block (607) pushes up the second limiting disc (604), causing the second limiting disc (604) to fit with the first limiting disc (603). And at this time, the second limiting disc (604) is no longer limited. The second connecting rod (504) is pulled back by the restoring force of the first return spring (507). The two groups of first limiting blocks (506) are no longer squeezed by the trigger block (505). The second limiting spring (508) is pushed back by the two groups of restoring plates (509), and then the first limiting block (506) is pushed back. At this time, the height of the diversion block (502) can be readjusted and the metal flow rate can be adjusted; S5. By providing wavy buffer lines at the bottom end of the welding chamber (4), the metal flow rate is slowed down, enabling the metal to converge and weld more evenly, reducing stress concentration. And by adjusting the height of the heightening plate (703) through the bidirectional screw rod (702), when there is a distance between the material after extrusion and discharge and the height of the conveying device, the material can be heightened by the heightening plate (703) at this time, making the material fall into the conveying device more smoothly and reducing the probability of deformation; S6. After the adjustment of the mold is completed, during extrusion, a stepped extrusion method is adopted. First, preliminary extrusion is carried out at a lower pressure to initially fill the complex cavity with metal, and then the pressure is gradually increased to further compact and weld the metal. At the same time, after each extrusion, local stress relief treatment is carried out on the mold using thermal aging treatment. The mold is heated to an appropriate temperature and maintained for a certain period of time to eliminate the stress generated by extrusion, improve the strength of the welding line, reduce the damage to the mold caused by stress, and extend the service life of the mold.

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