A hot sizing apparatus for aluminum alloy die castings

Abstract

The application discloses a kind of hot shaping equipment for aluminum alloy die casting, it is related to alloy hot shaping technical field, it solves the problem that existing technology exists in the hot shaping of aluminum alloy casting, replacement hot shaping mould process is complicated, hot shaping efficiency is low and inconvenient to operate;Including: base and frame, frame is fixed on base, the surface of base is provided with pressure maintaining bin;Hydraulic structure is set on frame, for driving hot shaping mould to carry out pressure maintaining operation;Hot shaping mould is used for the pressure maintaining and heating of product, and hot shaping mould includes lower mould and upper mould, and electric heating plate is arranged in lower mould and upper mould;Pressure bearing mechanism is set in pressure maintaining bin, for installing and supporting lower mould;The application realizes the quick installation, stable locking and convenient disassembly of mould by the synergistic effect of magnetic auxiliary wedge clamping mechanism and lateral locking mechanism, effectively solves the problem that traditional hot shaping mould replacement process is complicated and inefficient.

Description

Technical Field

[0001] This invention belongs to the field of alloy hot forming technology, and particularly relates to a hot forming device for aluminum alloy die castings. Background Technology

[0002] Aluminum alloy castings are widely used in automobile manufacturing. Components such as cylinder blocks, cylinder heads, intake manifolds, bearing housings, clutch housings, gearbox housings, pistons, and wheels are all made of aluminum alloy castings. In the processing of aluminum alloy castings, die casting and shaping are crucial steps, aiming to ensure that the shape of the aluminum alloy conforms to the processing requirements.

[0003] Currently, shaping is mainly achieved using contour forming fixtures. However, manual operation requires operators to repeatedly hammer the castings and check their flatness, a process that is extremely inconvenient and inefficient. Furthermore, the product releases stress and springs back, making it difficult to guarantee a high product yield. To address these issues, existing technology employs a solution of mounting a hot forming mold onto a hydraulic press. Specifically, the hydraulic press is first adjusted, and then the operator places the product to be formed into the hot forming mold and holds it under pressure. The heat from the hot forming mold releases internal stress in the product, thus preventing springback.

[0004] However, due to differences in product specifications and dimensions between different batches, each change of the hot forming mold requires a rather cumbersome process, such as disassembly and fixing with bolts. This not only reduces the efficiency of hot forming but also causes inconvenience in operation and use.

[0005] In summary, existing technologies for hot forming of aluminum alloy castings suffer from problems such as cumbersome hot forming mold replacement procedures, low hot forming efficiency, and inconvenient operation. Summary of the Invention

[0006] This invention provides a hot forming device for aluminum alloy die castings, which can solve the problems of cumbersome hot forming mold replacement process, low hot forming efficiency and inconvenient operation in the existing technology of hot forming of aluminum alloy castings.

[0007] To achieve the above objectives, according to an embodiment of the first aspect of the present invention, a hot forming apparatus for aluminum alloy die castings is provided, comprising: A base and a frame, wherein the frame is fixed on the base and a pressure-holding chamber is provided on the surface of the base; A hot forming mold is used for holding pressure and heating products. The hot forming mold includes a lower mold and an upper mold, and both the lower mold and the upper mold are provided with electric heating plates. A hydraulic structure, mounted on the frame, is used to drive the upper mold to perform mold closing and pressure holding operations; A pressure-bearing mechanism, located within the pressure-holding chamber, is used to install and support the lower mold. The pressure-bearing mechanism includes a pressure plate and a self-lifting device for elastically supporting the pressure plate. A connecting mechanism is respectively disposed on the pressure-bearing mechanism and the hydraulic structure, for detachably connecting the lower mold and the upper mold.

[0008] A further improvement is that the hydraulic structure includes a hydraulic cylinder fixed to the top surface of the frame, a pressure plate fixed to the end of the piston rod of the hydraulic cylinder, and a pair of guide rods symmetrically arranged on the frame and movably passing through the pressure plate.

[0009] A further improvement is that the self-lifting device includes a set of dampers fixedly embedded in the bottom of the pressure chamber, a connecting plate fixed to the bottom surface of the pressure plate and connected to the top end of the damper piston rod, and a lifting spring sleeved on the damper piston rod and fixed at both ends to the bottom surface of the connecting plate and the bottom surface of the pressure chamber, respectively.

[0010] A further improvement is that the connecting mechanism includes: A first mounting bracket is fixed to the surface of the pressure plate, and the surface of the first mounting bracket is provided with a slot for mounting the lower mold; A second mounting bracket is fixed to the bottom surface of the pressure plate, and the second mounting bracket is provided with a second slot for mounting the upper mold; And a fixing component, disposed between the first mounting bracket and the lower mold and between the second mounting bracket and the upper mold, for mechanical locking and fixing.

[0011] A further improvement is that the fixing component includes a resilient reset device: A pair of first wedge-shaped blocks are respectively disposed on the inner walls of the first mounting base and the second mounting base via an elastic reset device; A pair of second wedge blocks are fixed to both sides of the lower mold and the upper mold, respectively, for wedge-shaped engagement with the corresponding first wedge blocks; A magnetic attraction auxiliary structure includes an electromagnet unit fixed to the inner side of each first wedge block and a magnetic guide plate fixed to the outer side of each second wedge block. The electromagnet unit is magnetically attracted to the magnetic guide plate when energized.

[0012] A further improvement is that the elastic reset device includes a pair of guide posts fixed to the inner walls of the first and second mounting bases, a reset spring movably sleeved on each guide post, a groove on the back of each first wedge block, the groove fitting onto the guide post, and its inner wall fixedly connected to the reset spring, a positioning groove on the mounting surface of each second wedge block, and a positioning post that engages with the positioning groove fixed on the inner walls of the first and second mounting bases.

[0013] A further improvement is that it also includes a lateral locking mechanism; the lateral locking mechanism includes L-shaped swing rods rotatably disposed at the four corners of the bottom of the pressure plate, locking pins disposed on the inner wall of each L-shaped swing rod, and locking grooves opened on the sides of the lower mold, the upper mold, the first mounting bracket and the second mounting bracket; a compression spring is connected between the pressure plate and the lower end of the inner wall of each L-shaped swing rod; When the lower mold and upper mold are closed and the hydraulic cylinder drives the pressure plate to move downward, the inner wall of the pressure holding chamber forces the L-shaped rocker arm to swing inward, compressing the compression spring and causing the locking pin to engage in the corresponding locking groove for lateral limiting.

[0014] A further improvement is that grooves are vertically provided at the four corners of the inner wall of the pressure-holding chamber to limit the movement of each L-shaped rocker arm when it is pressed down.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) The solution of the present invention achieves rapid engagement and release of the upper and lower molds by setting a wedge-shaped fixing component and a magnetic auxiliary structure. When changing the mold, it is only necessary to push in or pull out, without the need for traditional bolt disassembly and assembly, thereby significantly shortening the mold change time and improving production continuity and equipment utilization. In addition, during the mold closing process, the first wedge block and the second wedge block are engaged by inclined self-locking, and with the magnetic auxiliary structure after being energized, a double fixing mechanism is formed, which effectively prevents the mold from loosening or displacing during high pressure holding, ensuring shaping accuracy.

[0016] (2) In the solution of the present invention, during the pressing process of the pressure plate, the L-shaped swing rod is guided by the inner wall of the pressure chamber to swing automatically inward, driving the locking pin to insert into the slot of the mold and the locking seat, thereby achieving lateral limiting of the mold, further enhancing the overall stability of the mold under high pressure, and avoiding mold displacement caused by lateral force.

[0017] (3) In the solution of the present invention, the self-lifting device in the pressure bearing mechanism adopts a combination structure of damper and lifting spring, which can provide elastic support and buffer during the pressure holding process, evenly distribute pressure, protect the mold and base structure, and extend the service life of the equipment.

[0018] (4) The solution of the present invention integrates the functions of installation, positioning, locking, and pressure bearing between the base and the frame in an overall design. The layout is reasonable, which facilitates the observation and operation of the operator, reduces the labor intensity, and improves the safety and efficiency of hot forming operations. The mold system supports quick replacement of upper and lower molds of different specifications, and is suitable for hot forming production of aluminum alloy die castings of various varieties and small batches. It has good process adaptability and economy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the thermal forming mold and connecting mechanism (locked state) of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 This is a front view schematic diagram of the installation structure of the upper mold cross-section on the pressure plate of the present invention; Figure 5 This is a top view schematic diagram of the installation structure of the upper mold inside the second mounting bracket of the present invention; Figure 6 This is a front view schematic diagram of the installation structure of the lower mold cross-section on the pressure plate of the present invention; Figure 7 This is a top view schematic diagram of the installation structure of the lower mold section inside the first mounting bracket of the present invention; Figure 8 This is a schematic diagram of the lateral locking mechanism of the upper and lower molds in the open state when the molds are closed.

[0020] Marked in the image: 1. Base; 101. Pressure holding chamber; 102. Groove; 2. Hot forming mold; 21. Upper mold; 22. Lower mold; 3. Frame; 4. Hydraulic structure; 41. Guide rod; 42. Hydraulic cylinder; 43. Pressure plate; 5. Pressure-bearing mechanism; 51. Pressure plate; 511. L-shaped swing rod; 512. Locking post; 513. Locking groove; 514. Compression spring; 52. Self-lifting device; 521. Damper; 522. Connecting plate; 523. Lifting spring; 6. Connecting mechanism; 61. First mounting bracket; 62. Second mounting bracket; 63. Fixing assembly; 631. First wedge block; 632. Second wedge block; 633. Electromagnet unit; 634. Magnetic guide plate; 64. Elastic reset device; 641. Guide post; 642. Reset spring; 643. Groove; 644. Positioning groove; 645. Positioning post; 601. Checkpoint 1; 602. Checkpoint 2. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0022] like Figures 1 to 8 As shown, a hot forming device for aluminum alloy die castings includes: The base 1 and the frame 3 are fixed on the base 1, and a pressure holding chamber 101 is provided on the surface of the base 1. The hot forming mold 2 is used for pressure holding and heating of the product. The hot forming mold 2 includes a lower mold 22 and an upper mold 21. Both the lower mold 22 and the upper mold 21 are equipped with electric heating plates. The lower mold 22 is equipped with a cavity for use with the upper mold 21 to hold and form the aluminum alloy die casting to be shaped. It should be noted that the hot forming mold with its own electric heating plate is selected during installation and use. This is existing technology and will not be described in detail in this embodiment. The plug of the electric heating plate is located on the side of the hot forming mold and is inserted into the external power cord to provide heat during pressure holding. During the mold closing process, the electric heating plates inside the upper mold 21 and the lower mold 22 begin to heat up, raising the mold temperature and thus heating and pressurizing the casting to promote internal stress release and reduce springback. The hydraulic structure 4 is mounted on the frame 3 and is used to drive the upper mold 21 to perform mold closing and pressure holding operations. The above part is the basic component. Specifically, the hydraulic structure 4 includes a hydraulic cylinder 42 fixed to the top surface of the frame 3, a pressure plate 43 fixed to the end of the piston rod of the hydraulic cylinder 42, and a pair of guide rods 41 symmetrically arranged on the frame 3 and movably passing through the pressure plate 43. The guide rods 41 are used to guide the pressure plate 43 when it is pressed down. By activating the hydraulic cylinder 42, the pressure plate 43 is driven to move downward along the guide rods 41, thereby causing the upper mold 21 and the lower mold 22 to close. It should be noted that insulation material can be installed inside the pressure holding chamber 101, and the installation can be selected according to the requirements. In addition, the equipment can be equipped with a cooling fan on the frame 3 for rapid cooling of the alloy casting after pressure holding. When the alloy casting is under pressure, the pressure plate 43 is located at the opening of the pressure holding chamber 101, which keeps the entire pressure holding operation warm and reduces the impact of temperature changes on the quality of the casting after hot forming. It also includes: a pressure-bearing mechanism 5, which is set inside the pressure-holding chamber 101 and is used to install and support the lower mold 22. The pressure-bearing mechanism 5 includes a pressure plate 51 and a self-lifting device 52 for elastically supporting the pressure plate 51. The initial position and the position after resetting of the pressure plate 51 are higher than the opening of the pressure-holding chamber 101. Specifically, the self-lifting device 52 includes a set of dampers 521 fixedly embedded in the bottom of the pressure chamber 101, a connecting plate 522 fixed to the bottom surface of the pressure plate 51 and connected to the top of the piston rod of the damper 521, and a lifting spring 523 sleeved on the piston rod of the damper 521 and fixed at both ends to the bottom surface of the connecting plate 522 and the bottom surface of the pressure chamber 101, respectively. After each pressure holding process is completed, the hydraulic cylinder 42 rises, the lifting spring 523 in the self-lifting device 52 rebounds, pushes the pressure plate 51 to move upward, drives the lower mold 22 to reset, and thus removes the alloy casting in the cavity of the lower mold 22. The connecting mechanism 6 is respectively installed on the pressure-bearing mechanism 5 and the hydraulic structure 4, and is used to detachably connect the lower mold 22 and the upper mold 21; The connecting mechanism 6 includes: A first mounting bracket 61 is fixed to the surface of the pressure plate 51, and the surface of the first mounting bracket 61 is provided with a slot 601 for mounting the lower mold 22; A second mounting bracket 62 is fixed to the bottom surface of the pressure plate 43, and the second mounting bracket 62 is provided with a second slot 602 for mounting the upper mold 21; And a fixing component 63, which is disposed between the first mounting bracket 61 and the lower mold 22 and the second mounting bracket 62 and the upper mold 21, for mechanical snap-fit ​​fixing; Specifically, the fixing component 63 includes an elastic reset device 64: A pair of first wedge-shaped blocks 631 are respectively disposed on the inner walls of the first mounting base 61 and the second mounting base 62 via an elastic reset device 64, and can move and reset within a certain range; A pair of second wedge blocks 632 are fixed on both sides of the lower mold 22 and the upper mold 21 respectively, and are used to wedge with the corresponding first wedge block 631. When the mold is closed, the wedge-shaped inclined surfaces of the two cooperate with each other to generate a preliminary mechanical locking force. To enhance locking performance and prevent loosening under pressure, a magnetic auxiliary structure is also provided. This magnetic auxiliary structure includes an electromagnet unit 633 and a magnetic plate 634; The electromagnet unit 633 is embedded in and fixed on the wedge-shaped inclined surface of the first wedge block 631, and its adsorption surface is flush with the inclined surface; The magnetic plate 634 is fixed to the wedge-shaped inclined surface of the second wedge block 632. When the mold is closed and the wedge blocks are initially engaged, the electromagnet unit 633 is energized to generate a strong magnetic force, which tightly attracts the magnetic plate 634, thereby firmly locking the first wedge block 631 and the second wedge block 632 into one piece, thus ensuring that the mold will not loosen during subsequent pressurization. Before the mold is opened, the electromagnet is de-energized and demagnetized. Under the action of the elastic reset device 64, the first wedge block 631 is reset, releasing the wedge engagement. The elastic reset device 64 includes a pair of guide posts 641 fixed to the inner walls of the first mounting base 61 and the second mounting base 62 on both sides, and a reset spring 642 movably sleeved on each guide post 641. Each first wedge block 631 has a groove 643 on its back side, which fits onto the guide post 641 and its inner wall is fixedly connected to the reset spring 642. Each second wedge block 632 has a positioning groove 644 on its mounting surface. The inner walls of the first mounting base 61 and the second mounting base 62 are fixed with positioning posts 645 that fit into the positioning grooves 644. When the mold approaches the mounting base, the inclined surfaces of the second wedge blocks 632 on both sides of the mold will contact the inclined surfaces of the first wedge blocks 631, pushing the first wedge blocks 631 to move outward along the guide post 641 and compressing the reset spring 642. As the mold continues to be pushed in, once the mold is fully inserted into the slot, the first wedge block 631 is reset inward under the action of the return spring 642, forming a wedge engagement with the second wedge block 632. The lower mold 22 is aligned and inserted into the slot 601 of the first mounting base 61, and the initial alignment is achieved through the cooperation of the positioning pin 645 and the positioning groove 644. At the same time, the upper mold 21 is aligned and inserted into the slot 602 of the second mounting base 62 in the same manner.

[0023] In this embodiment, there is also a preferred implementation, which includes a lateral locking mechanism; The lateral locking mechanism includes L-shaped rocker arms 511 rotatably mounted at the four corners of the bottom of the pressure plate 51, locking pins 512 mounted on the inner wall of each L-shaped rocker arm 511, and locking grooves 513 formed on the sides of the lower mold 22, the upper mold 21, the first mounting bracket 61, and the second mounting bracket 62; a compression spring 514 is connected between the pressure plate 51 and the lower end of the inner wall of each L-shaped rocker arm 511. It should be noted that the compression spring 514 connected between the lower ends of the inner walls of the L-shaped rocker arm 511 has the following installation method: At the bottom of the pressure plate 51, on the back of the first mounting bracket 61 and the second mounting bracket 62, there is a pair of L-shaped swing rods 511. One end of the compression spring 514 between them is fixedly connected to the pressure plate 51, and the other end is rotatably connected to the L-shaped swing rod 511 via a rotating shaft. Between the pair of L-shaped swing rods 511 located between the lower mold 22 and the upper mold 21, one end of the compression spring 514 is fixedly connected to the L-shaped swing rod 511, and the other end contacts the pressure plate 51 when the L-shaped swing rod 511 rotates. This design is to facilitate the removal of the upper mold 21 and the lower mold 22 for replacement. When the lower mold 22 and the upper mold 21 are closed and the hydraulic cylinder 42 drives the pressure plate 51 to move downward, the inner wall of the pressure holding chamber 101 forces the L-shaped swing rod 511 to swing inward, compressing the compression spring 514 and causing the locking pin 512 to engage in the corresponding slot 513 for lateral limiting. After the pressure holding process is completed, the constraint of the inner wall of the pressure holding chamber 101 on the L-shaped swing rod 511 is released, the compression spring 514 pushes the L-shaped swing rod 511 to swing outward, the locking pin 512 exits from the slot 513, the lateral lock is released, and one pressure holding operation is completed.

[0024] In this embodiment, specifically, grooves 102 are vertically provided at the four corners of the inner wall of the pressure chamber 101 to limit the movement of each L-shaped swing rod 511 when it is pressed down, which further effectively prevents the mold from shifting horizontally when it is pressed down.

[0025] In this embodiment, it should also be noted that the actual dimensions of each component in the application document are selected and installed according to the actual needs on site. Additionally, it should be noted that this application document only addresses the shortcomings of existing technologies in the hot forming of aluminum alloy castings, such as the cumbersome process of changing hot forming molds, low hot forming efficiency, and inconvenient operation. It does not involve other aspects, but improves upon these shortcomings by adopting magnetic disassembly and lateral locking methods to solve the problems of the prior art.

[0026] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios: In practical application of this invention: First, the upper mold 21 and lower mold 22 of the hot forming mold 2 are respectively installed below the pressure plate 43 and above the pressure plate 51 of the hydraulic structure 4. Specifically, during installation, the lower mold 22 is aligned and inserted into the slot 601 of the first mounting bracket 61, and initial alignment is achieved through the cooperation of the positioning pin 645 and the positioning groove 644; simultaneously, the upper mold 21 is aligned and inserted into the slot 602 of the second mounting bracket 62 in the same manner.

[0027] When the mold approaches the clamping seat, the inclined surfaces of the magnetic plates 634 of the second wedge blocks 632 on both sides of the mold will contact the inclined surfaces of the electromagnet units 633 of the first wedge block 631, pushing the first wedge block 631 outward along the guide post 641 and compressing the return spring 642. As the mold continues to be pushed in, when the mold is fully inserted into the clamping seat, the electromagnet units 633 return inward under the action of the return spring 642, forming a wedge-shaped engagement with the magnetic plates 634. At this time, the electromagnet units 633 can be energized by the control circuit to generate a magnetic attraction force between them and the magnetic plates 634, further enhancing the fixing effect and ensuring that the mold will not loosen during subsequent pressurization.

[0028] After the mold is installed, the aluminum alloy die-cast part to be shaped is placed in the cavity of the lower mold 22. The hydraulic cylinder 42 is activated, driving the pressure plate 43 to move downward along the guide rod 41, causing the upper mold 21 and the lower mold 22 to close. During the mold closing process, the electric heating plates inside the upper mold 21 and the lower mold 22 begin to heat up, raising the mold temperature, thereby heating and pressurizing the casting, promoting the release of internal stress and reducing springback.

[0029] When the mold is closed and pressure is applied, the pressure plate 51 is subjected to downward pressure, which causes the damper 521 and lifting spring 523 in the self-lifting device 52 to gradually compress, so that the lower mold 22 can stably bear the pressure. At the same time, during the downward movement of the pressure plate 51, the groove 102 on the inner wall of the pressure holding chamber 101 guides the L-shaped swing rod 511 to swing inward gradually, the compression spring 514 is compressed, and the locking pin 512 is inserted into the locking groove 513 on the side of the lower mold 22, the upper mold 21 and the corresponding locking seat, so as to achieve lateral locking and limiting, thereby preventing the mold from shifting horizontally when pressed down.

[0030] After the pressure holding process is completed, the hydraulic cylinder 42 rises. The lifting spring 523 in the self-lifting device 52 rebounds, pushing the pressure plate 51 upward and causing the lower mold 22 to reset. At the same time, the constraint of the inner wall of the pressure holding chamber 101 on the L-shaped swing rod 511 is released, the compression spring 514 pushes the L-shaped swing rod 511 to swing outward, the locking pin 512 exits from the locking groove 513, the lateral lock is released, and one pressure holding operation is completed.

[0031] When mold replacement is needed, the operator disconnects the current to the electromagnet unit 633, eliminating the magnetic attraction. The mold can then be gently pulled outwards manually or with tools. The inclined surface of the second wedge block 632 pushes the first wedge block 631 outwards, allowing the mold to be removed from the holder for quick disassembly. The entire process eliminates the need for traditional fasteners such as bolts, significantly reducing mold change time and improving production efficiency. This invention, through the synergistic effect of the magnetically assisted wedge-shaped clamping mechanism and the lateral locking mechanism, achieves rapid mold installation, secure locking, and convenient disassembly, effectively solving the problems of cumbersome and inefficient replacement procedures in traditional hot forming molds. It is particularly suitable for hot forming production scenarios of multi-variety, small-batch aluminum alloy die-casting parts.

[0032] The above-disclosed embodiments are only a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A hot forming device for aluminum alloy die castings, characterized in that, include: The base (1) and the frame (3) are fixed on the base (1), and a pressure-holding chamber (101) is provided on the surface of the base (1). A hot forming mold (2) is used for pressure holding and heating of the product. The hot forming mold (2) includes a lower mold (22) and an upper mold (21). Both the lower mold (22) and the upper mold (21) are equipped with electric heating plates. A hydraulic structure (4) is installed on the frame (3) and is used to drive the upper mold (21) to perform mold closing and pressure holding operations; The pressure-bearing mechanism (5) is located in the pressure-holding chamber (101) and is used to install and support the lower mold (22). The pressure-bearing mechanism (5) includes a pressure plate (51) and a self-lifting device (52) for elastically supporting the pressure plate (51). The connecting mechanism (6) is respectively disposed on the pressure bearing mechanism (5) and the hydraulic structure (4) for detachably connecting the lower mold (22) and the upper mold (21).

2. The hot forming equipment for aluminum alloy die castings according to claim 1, characterized in that, The hydraulic structure (4) includes a hydraulic cylinder (42) fixed to the top surface of the frame (3), a pressure plate (43) fixed to the end of the piston rod of the hydraulic cylinder (42), and a pair of guide rods (41) symmetrically arranged on the frame (3) and movably passing through the pressure plate (43).

3. The hot forming equipment for aluminum alloy die castings according to claim 1, characterized in that, The self-lifting device (52) includes a set of dampers (521) fixedly embedded in the bottom of the pressure chamber (101), a connecting plate (522) fixed to the bottom surface of the pressure plate (51) and connected to the top end of the piston rod of the damper (521), and a lifting spring (523) sleeved on the piston rod of the damper (521) and fixed at both ends to the bottom surface of the connecting plate (522) and the bottom surface of the pressure chamber (101) respectively.

4. A hot forming device for aluminum alloy die castings according to claim 1 or 2, characterized in that, The connecting mechanism (6) includes: A first mounting bracket (61) is fixed to the surface of the pressure plate (51), and the surface of the first mounting bracket (61) is provided with a slot (601) for mounting the lower mold (22). A second mounting bracket (62) is fixed to the bottom surface of the pressure plate (43), and the second mounting bracket (62) is provided with a second slot (602) for mounting the upper mold (21); And a fixing component (63) is disposed between the first mounting bracket (61) and the lower mold (22) and between the second mounting bracket (62) and the upper mold (21) for mechanical snap-fit ​​fixing.

5. A hot forming device for aluminum alloy die castings according to claim 4, characterized in that, The fixing component (63) includes a resilient reset device (64): A pair of first wedge blocks (631) are respectively disposed on the inner walls of the first mounting base (61) and the second mounting base (62) via an elastic reset device (64); A pair of second wedge blocks (632) are fixed to both sides of the lower mold (22) and the upper mold (21) respectively, for wedge-shaped engagement with the corresponding first wedge block (631); The magnetic attraction auxiliary structure includes an electromagnet unit (633) fixed to the inner side of each first wedge block (631) and a magnetic plate (634) fixed to the outer side of each second wedge block (632). The electromagnet unit (633) is magnetically attracted to the magnetic plate (634) when energized.

6. A hot forming device for aluminum alloy die castings according to claim 5, characterized in that, The elastic reset device (64) includes a pair of guide posts (641) fixed to the inner walls of the first mounting base (61) and the second mounting base (62) on both sides, a reset spring (642) sleeved on each of the guide posts (641), a sleeve (643) fixed to the side of each of the first wedge blocks (631), the sleeve (643) being fitted onto the guide post (641), a positioning groove (644) being provided on the mounting surface of each of the second wedge blocks (632), and a positioning post (645) being fixed to the inner walls of the first mounting base (61) and the second mounting base (62) to engage with the positioning groove (644).

7. A hot forming device for aluminum alloy die castings according to claim 4, characterized in that, It also includes a lateral locking mechanism; the lateral locking mechanism includes L-shaped rocker arms (511) rotatably disposed at the four corners of the bottom of the pressure plate (51), locking pins (512) disposed on the inner wall of each L-shaped rocker arm (511), and locking grooves (513) opened on the sides of the lower mold (22), the upper mold (21), the first mounting bracket (61) and the second mounting bracket (62); a compression spring (514) is connected between the pressure plate (51) and the lower end of the inner wall of each L-shaped rocker arm (511); When the lower mold (22) and the upper mold (21) are closed and the hydraulic cylinder (42) drives the pressure plate (51) to move downward, the inner wall of the pressure holding chamber (101) forces the L-shaped swing rod (511) to swing inward, compress the compression spring (514), and cause the locking pin (512) to be locked into the corresponding locking groove (513) for lateral limiting.

8. A hot forming device for aluminum alloy die castings according to claim 7, characterized in that, The pressure chamber (101) has grooves (102) vertically opened at the four corners of its inner wall to limit the movement of each L-shaped rocker arm (511) when it is pressed down.

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