Casting and forging functional structure for improving strength of cabin casting

Abstract

The invention relates to a casting and forging functional structure for improving the strength of a cabin casting, which is characterized in that by driving an insert to transversely withdraw, a withdrawing gap is formed between adjacent lower modules, and the lower modules are pushed to transversely move to extrude semi-solid aluminum; and after the retreating gap disappears, the insert is reset to form transverse blocking on the lower die piece, so that the semi-solid aluminum is subjected to high-pressure forging and pressing which are controllable in the longitudinal and transverse sequence in sequence in the solidification process. The multidirectional alternate severe plastic deformation forces internal grains to be fully crushed, rheologically and dynamically recrystallized in all directions, and the problems of uneven grain refinement and unbalanced stress distribution caused by traditional single-direction extrusion are effectively solved. And meanwhile, the retreating / resetting design of the lower die piece and the insert ensures that the transverse extrusion force is uniformly transmitted to the whole side wall of the casting, clamping stagnation or insufficient local extrusion caused by rigid collision of the die is avoided, and therefore the internal quality and the overall strength of the casting are improved.

Description

Technical Field

[0001] This application relates to mold casting, and more particularly to cast-forged functional structures for improving the strength of cabin castings. Background Technology

[0002] As a key structural component, cabin castings are widely used in aerospace, transportation and special equipment fields. Their mechanical properties, especially strength indicators, are directly related to the reliability and safety of the overall equipment.

[0003] Existing casting and forging structures have significant technical shortcomings in the strengthening process of semi-solid aluminum. On the one hand, existing structures mostly use a single-direction extrusion mechanism to apply pressure to the semi-solid aluminum in the casting space, lacking a coordinated design of alternating longitudinal and transverse extrusion. This results in uneven grain refinement and unbalanced stress distribution within the semi-solid aluminum, with some areas still retaining microscopic defects due to insufficient extrusion, limiting the overall improvement in the mechanical properties of the casting. On the other hand, as a key component of the casting space, the lower die in existing structures lacks a retraction adjustment mechanism adapted to the extrusion action. The lower die is mostly an integral or fixed splice design. When transverse extrusion is required, the lower die lacks effective retraction space, which not only causes uneven extrusion force transmission and is prone to localized incomplete extrusion, but may also cause jamming due to rigid collision of the die.

[0004] Therefore, there is a need for a casting-forging functional structure that can achieve multi-directional and alternating pressure application, thereby improving the strength of the cabin casting while ensuring the complete formation of the casting. Summary of the Invention

[0005] The purpose of this application is to provide a casting and forging functional structure that can achieve multi-directional and alternating pressure application, thereby improving the strength of the cabin casting while ensuring the complete formation of the casting.

[0006] According to one aspect of this application, a casting and forging functional structure for improving the strength of a cabin casting is provided for casting aluminum cabin castings by the liquid-lifting method, wherein the cabin casting is formed in a casting space enclosed by a gap fit between an upper mold and a lower mold. The structure includes: a longitudinal pressing mechanism and a transverse pressing mechanism that alternately press the semi-solid aluminum in the longitudinal direction and in the transverse direction after the aluminum liquid is cooled to a semi-solid aluminum by step cooling in the lower mold; The transverse pressing mechanism is located on the side of the lower mold opposite to the inner mold and is connected to the lower mold. The transverse pressing mechanism includes at least: an insert and a transverse pushing assembly. Viewed longitudinally, the lower mold is composed of multiple adjacent lower mold parts with gaps around the casting space. The insert is embedded laterally between two adjacent lower mold parts and abuts against the casting space. When the insert is partially withdrawn laterally from between the lower mold parts, a retraction gap is generated between the lower mold part and the adjacent insert. The lateral push assembly pushes the lower mold part to squeeze the semi-solid aluminum in the casting space laterally until the retraction gap disappears. The insert forms a lateral obstruction to the lower mold part.

[0007] In at least one embodiment of this application, the lateral push component includes: A horizontal push plate is connected to the lower mold component; The first hydraulic cylinder has its output end connected to the horizontal push plate. The first hydraulic cylinder provides power to drive the horizontal push plate to move laterally, so as to push the lower die to extrude semi-solid aluminum in the casting space laterally.

[0008] In at least one embodiment of this application, the lateral push component further includes: The limiting slide rail has one end fixed to the side of the horizontal push plate away from the first hydraulic cylinder, and the other end extends longitudinally and forms a sliding connection with the lower mold in the longitudinal direction, and forms a limit in the transverse direction. The lower mold part has a limiting groove at one end near the horizontal push plate that is adapted to the limiting slide rail. When replacing different corresponding lower mold parts for different cabin castings, the lower mold part is lifted longitudinally to remove it from the installation, and then the new lower mold part is guided longitudinally into the limiting slide rail to complete the assembly.

[0009] In at least one embodiment of this application, the transverse pressing mechanism further includes: The second hydraulic cylinder, the lower mold and the insert are located on the same side of the horizontal push plate, the first hydraulic cylinder and the second hydraulic cylinder are respectively located on the other side of the horizontal push plate, the second hydraulic cylinder is positioned opposite to the lower mold and is located on the side of the horizontal push plate away from the lower mold, the second hydraulic cylinder is positioned opposite to the insert and is located on the side of the horizontal pressure plate away from the insert; The output end of the second hydraulic cylinder passes through the push plate and is connected to the insert. The second hydraulic cylinder is fixed on the push plate. The second hydraulic cylinder drives the insert to move closer to or away from the push plate in a lateral direction. When the insert moves closer to the push plate, the insert partially retracts between the two lower mold pieces, creating a retraction gap. The first hydraulic cylinder pushes the push plate in a lateral direction towards the casting space, so as to simultaneously drive the insert and the lower mold pieces towards the casting space. During the approach process, the lower mold pieces, which are in contact with the semi-solid aluminum in the casting space, squeeze the semi-solid aluminum.

[0010] In at least one embodiment of this application, the push plate includes: The flat plate has one side connected to the output end of the first hydraulic cylinder and the other side connected to the limiting slide rail. The side of the flat plate connected to the output end of the first hydraulic cylinder is denoted as side a, and the side of the flat plate connected to the limiting slide rail is denoted as side b. The inclined plate portion is integrally formed with the flat plate portion, and one side is connected to the second hydraulic cylinder, while the other side faces the insert. The side of the inclined plate portion connected to the second hydraulic cylinder is denoted as surface c, and the side of the inclined plate portion facing the insert is denoted as surface d. Viewed longitudinally, surface b is coplanar with surface d, surface a forms an angle with surface c, and surfaces b and d are perpendicular to the direction of the semi-solid aluminum in the lateral extrusion casting space of the lower mold, while surfaces a and c are perpendicular to the direction of the insert moving out of the lower mold in the lateral direction.

[0011] In at least one embodiment of this application, the number of inserts corresponds to the number of lower molds, and each horizontal push plate is connected to an insert and a lower mold, or each horizontal push plate is connected to a lower mold and two inserts symmetrically connected to both sides of the lower mold. Viewed longitudinally, when the insert is inserted laterally between two adjacent lower molds and abuts against the casting space, the inner circumferential side of the lower mold and the insert are connected to each other to form a circumferentially closed space. The casting space is formed within the closed space. The longitudinal pressing mechanism is arranged longitudinally directly above the closed space. When the upper mold descends into the closed space and gap-fits with the lower mold to form the casting space, the longitudinal pressing mechanism forms a seal above the casting space in the longitudinal direction. When the horizontal pressing mechanism and the vertical pressing mechanism alternately press the semi-solid aluminum in the casting space, when either of them presses the casting space, the other of them remains in contact with the casting space or exits the casting space.

[0012] In at least one embodiment of this application, the longitudinal compression mechanism includes: The longitudinal pressing component is fitted onto the outer circumferential surface of the upper mold and extends longitudinally downward into the casting space. Together with the upper mold, it seals the top of the closed area and independently seals the top of the casting space. The third hydraulic cylinder pushes the longitudinal pressing member to squeeze the semi-solid aluminum in the casting space along the longitudinal direction, or pulls the longitudinal pressing member out of the casting space; The connecting flange is connected at one end to the longitudinal pressure member and at the other end to the output end of the third hydraulic cylinder.

[0013] 8. The casting and forging functional structure for improving the strength of cabin castings according to claim 7, characterized in that the structure further includes: The riser pipe is connected at one end to the riser nozzle inside the lower mold. The liquid riser is located below the lower mold and connected to the other end of the riser pipe. Liquid aluminum settles in the liquid riser. The liquid aluminum settled at the bottom is extracted and the liquid aluminum is raised along the riser pipe into the casting space by air pressure.

[0014] A casting platform, wherein the lower mold is fixed on the casting platform, and the liquid lifting furnace is located below the casting platform; A lifting platform is located directly above the casting platform, and the upper mold is fixed to the side of the lifting platform near the casting platform; the third hydraulic cylinder is located inside the lifting platform. Before casting, the lifting platform lowers the upper mold into the lower mold, and after casting is completed, it raises the upper mold to separate the cabin casting, which has been further cooled to solid aluminum, from the lower mold in the longitudinal direction.

[0015] In at least one embodiment of this application, the structure further includes: The pressure-bearing base is cast in place, with a concave center forming a U-shape. The casting platform is fixed to both ends of the protruding part of the pressure-bearing base, and the liquid-lifting furnace is located within the concave area of ​​the pressure-bearing base. A hydraulic control tower is mounted on the pressure-bearing base and located above the casting platform. The lifting platform is longitudinally slidable between the hydraulic control tower and the casting platform. The hydraulic control tower provides power to drive the lifting platform to slide and rise longitudinally between the hydraulic control tower and the casting platform.

[0016] In at least one embodiment of this application, the structure further includes: The main base, cast in concrete, includes a first platform, a second platform recessed downward from the first platform, a third platform recessed from the second platform, and a pressure-bearing area extending longitudinally. The pressure-bearing base is cast in the pressure-bearing area, and the recessed area of ​​the pressure-bearing area is flush with the third platform. A tilting furnace is located on the second platform. A slide rail is provided between the third platform and the recessed area of ​​the pressure-bearing platform. The lifting furnace moves along the slide rail to the recessed area below the casting platform or to the third platform. The tilting furnace on the second platform pours liquid aluminum into the lifting furnace. The lifting furnace then moves along the guide rail to the area below the casting platform and extracts the liquid aluminum that has settled at the bottom into the casting space for casting.

[0017] This application has the following beneficial effects: By driving the insert to retract laterally to create a retraction gap between adjacent lower mold parts, the lower mold parts are then pushed to move laterally to extrude semi-solid aluminum until the retraction gap disappears and the insert forms a lateral obstruction to the lower mold parts. This ensures that the semi-solid aluminum can withstand sequential and controllable high-pressure forging from both longitudinal and lateral directions during solidification. This multi-directional alternating and intense plastic deformation forces the internal grains of the semi-solid aluminum to undergo sufficient fragmentation, rheology, and dynamic recrystallization in all directions, effectively eliminating the problems of uneven grain refinement and stress distribution imbalance caused by traditional unidirectional extrusion. At the same time, the retraction and repositioning design between the lower mold parts and the insert ensures that the lateral extrusion force can be uniformly and fully transmitted to the entire sidewall of the casting, avoiding jamming or localized incomplete extrusion caused by rigid collision of the mold. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the casting and forging functional structure described in the embodiments of this application; Figure 2 This is a front cross-sectional schematic diagram of the casting and forging functional structure described in the embodiments of this application; Figure 3 This is a schematic diagram of the upper and lower molds in the embodiments of this application; Figure 4 This is a schematic diagram of the transverse pressing mechanism on the casting platform in the embodiments of this application; Figure 5 for Figure 4 A schematic diagram of the structure of the middle A section; Figure 6 This is a partial top view of the insert and transverse pressing assembly in the embodiments of this application; Figure 7 This is a schematic diagram showing a partial state of the insert after it has been moved in an embodiment of this application. Figure 8 This is a schematic diagram of the structure formed by the insert and the lower mold in the embodiment of this application; Figure 9 This is an exploded structural diagram of the insert and the lower mold component in the embodiments of this application; Figure 10 This is a cross-sectional schematic diagram of the upper mold and the longitudinal pressing mechanism in the embodiment of this application.

[0020] Reference numerals: 100, Casting and forging functional structure; 10, Upper die; 11, Longitudinal pressing mechanism; 111, Longitudinal pressing component; 112, Third hydraulic cylinder; 113, Connecting flange; 20, Lower die; 20a, Casting space; 20b, Retraction clearance; 21, Lower die component; 211, Limiting slide; 30, Horizontal pressing mechanism; 31, Insert; 32, Horizontal push assembly; 321, Horizontal push plate; 3211, Flat plate section; 3212, Inclined plate section; 322, First... Hydraulic cylinder; 323, Limiting slide rail; 324, Second hydraulic cylinder; a, surface a; b, surface b; c, surface c; d, surface d; 40, Enclosed space; 50, Lifting pipe; 60, Lifting furnace; 70, Casting platform; 80, Lifting platform; 90, Main base; 91, First platform; 92, Second platform; 93, Third platform; 94, Pressure-bearing area; 921, Tilting furnace; 931, Slide rail; 941, Pressure-bearing base; 911, Hydraulic control tower. Detailed Implementation

[0021] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0022] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Please refer to Figure 1 - Figure 10 One embodiment of this application provides a casting and forging functional structure 100 for improving the strength of cabin castings, used for casting aluminum cabin castings by liquid lifting method, wherein the cabin casting is formed in a casting space 20a enclosed by an upper mold 10 and a lower mold 20 with a clearance fit.

[0025] The structure includes a longitudinal pressing mechanism 11 and a transverse pressing mechanism 30 that alternately press the semi-solid aluminum in the longitudinal direction and in the transverse direction after the aluminum liquid is cooled to a semi-solid aluminum by step cooling in the lower mold 20.

[0026] The horizontal pressing mechanism 30 is located on the side of the lower mold 20 away from the inner mold and is connected to the lower mold 20. The horizontal pressing mechanism 30 includes at least: an insert 31 and a horizontal pushing assembly 32.

[0027] Viewed longitudinally, the lower mold 20 is composed of multiple adjacent lower mold parts 21 with gaps around the casting space 20a. The insert 31 is inserted laterally between two adjacent lower mold parts 21 and abuts against the casting space 20a. When the insert 31 is partially withdrawn laterally from between the lower mold parts 21, a retraction gap 20b is generated between the lower mold part 21 and the adjacent insert 31. The horizontal pushing component 32 pushes the lower mold part 21 to squeeze the semi-solid aluminum in the casting space 20a laterally until the retraction gap 20b disappears. The insert 31 forms a lateral obstruction to the lower mold part 21.

[0028] Specifically, the liquid-filling method refers to filling the casting space 20a formed by the gap fit between the upper mold 10 and the lower mold 20 from bottom to top with liquid aluminum used to manufacture the missile body.

[0029] By controlling the solidification process of molten aluminum through stepped cooling, the molten aluminum is gradually transformed into a semi-solid aluminum in a solid-liquid mixed state. The semi-solid aluminum has a certain shape retention ability and can undergo plastic flow under high pressure, which facilitates grain reconstruction during extrusion and avoids uneven internal temperature caused by rapid cooling.

[0030] After the molten aluminum forms semi-solid aluminum through the stepped cooling process of the lower mold 20, the longitudinal pressing mechanism 11 and the transverse pressing mechanism 30 alternately extrude the semi-solid aluminum along the longitudinal and transverse directions, respectively. The longitudinal pressing mechanism 11 applies pressure to the semi-solid aluminum in the casting space 20a in the longitudinal direction, that is, in the direction perpendicular to the bottom surface of the casting space 20a. The transverse pressing mechanism 30 applies pressure to the semi-solid aluminum in the casting space 20a in the transverse direction, that is, in the direction parallel to the bottom surface of the casting space 20a. Applying pressure from the side forces the semi-solid aluminum to flow in the direction perpendicular to the main pressure, further eliminating defects in the side walls or corners that may not be accessible in the longitudinal pressing direction. The alternating extrusion design breaks the limitations of traditional single-direction extrusion, allowing the semi-solid aluminum to be stressed in multiple directions, promoting uniform refinement of the semi-solid aluminum in multiple directions, avoiding microscopic defects caused by local stress concentration or insufficient extrusion, thereby laying the foundation for improving the overall mechanical properties of the casting.

[0031] Furthermore, the lower die 20 is composed of multiple adjacent lower die parts 21 spaced apart, surrounding the casting space 20a. This segmented, spaced lower die 20 is the core carrier for achieving lateral extrusion and retraction adjustment. The insert 31 is laterally embedded between adjacent lower die parts 21 and abuts against the casting space 20a. Its initial position serves to fix the spacing between the lower die parts 21 and maintain the shape of the casting space 20a. When lateral extrusion is required, the insert 31 partially retracts from between the lower die parts 21, creating a retraction gap 20b between adjacent lower die parts 21 and the insert 31. This provides space for the lateral movement of the lower die parts 21, preventing rigid collisions or jamming between the lower die parts 21 and the insert 31. The lateral push assembly 32 pushes the lower die 21 to move laterally into the casting space 20a, applying lateral extrusion force to the semi-solid aluminum until the retraction gap 20b disappears, that is, the lower die 21 moves to re-abut against the insert 31. At this time, the insert 31 forms a lateral block on the lower die 21 to prevent the lower die 21 from retracting and ensure the stability of the lateral extrusion effect.

[0032] When the retraction gap 20b disappears, the insert 31 becomes a lateral limiting member of the lower die 21, preventing the lower die 21 from moving excessively due to the continuous force of the lateral push assembly 32, ensuring that the extrusion stroke of each lower die 21 is consistent, avoiding the casting wall thickness deviation caused by uneven movement of the lower die 21, and further ensuring the dimensional accuracy and mechanical property uniformity of the cabin casting.

[0033] In one specific embodiment, the horizontal push assembly 32 includes: a horizontal push plate 321 and a first hydraulic cylinder 322.

[0034] The horizontal push plate 321 is connected to the lower die 21. The output end of the first hydraulic cylinder 322 is connected to the horizontal push plate 321. The first hydraulic cylinder 322 provides power to drive the horizontal push plate 321 to move laterally, so as to push the lower die 21 to extrude semi-solid aluminum in the casting space 20a laterally.

[0035] Specifically, the horizontal push plate 321 is directly connected to the lower mold 21 and serves as an intermediate medium for power transmission. Its function is to disperse the concentrated force output by the first hydraulic cylinder 322 and prevent the lower mold 21 from being deformed or damaged due to excessive local stress. At the same time, the contact surface between the horizontal push plate 321 and the lower mold 21 is usually designed as a plane or a curved surface that fits the shape of the lower mold 21 to ensure that the direction of force transmission is strictly along the lateral direction and to avoid the skew torque affecting the movement accuracy of the lower mold 21.

[0036] The horizontal push plate 321 has sufficient rigidity and flatness, which can evenly distribute and transmit the concentrated force applied by the first hydraulic cylinder 322 to each lower die 21 connected to it, ensuring that the pressure distribution on the extrusion surface is uniform, thereby making the stress on the side wall of the casting more uniform and further improving the uniformity of the forging effect.

[0037] The first hydraulic cylinder 322 serves as the power source, and its output end is rigidly connected to the transverse push plate 321. Through the pressure control of the hydraulic system, the transverse extrusion force can be adjusted, including but not limited to setting parameters such as pressure magnitude, loading speed, and holding time. Compared with mechanical transmission or electric push rods, hydraulic cylinders have advantages such as large output force, stable response, and strong overload protection, making them particularly suitable for processes such as semi-solid aluminum extrusion that require large thrust and high-precision control.

[0038] In one specific embodiment, the horizontal push assembly 32 further includes: a limiting slide rail 323, one end of which is fixed to the side of the horizontal push plate 321 away from the first hydraulic cylinder 322, and the other end extends longitudinally and forms a sliding connection with the lower mold 21 in the longitudinal direction, and forms a limiting position in the transverse direction.

[0039] The lower mold 21 has a limiting groove 211 at one end near the horizontal push plate 321 that is adapted to the limiting slide rail 323. When replacing different corresponding lower molds 21 for different cabin castings, the lower mold 21 is lifted longitudinally to remove it from the installation, and then the new lower mold 21 is guided longitudinally into the limiting slide rail 323 to complete the assembly.

[0040] Specifically, the limiting slide rail 323 limits the movement direction of the lower mold part 21 in the lateral direction. By sliding with the lower mold part 21, the limiting slide rail 323 restricts the movement range of the lower mold part 21 within the lateral plane, ensuring that it can only move along the preset lateral path, thus avoiding uneven extrusion or mold collision caused by directional deviation.

[0041] The limiting groove 211 is typically designed as a recess that matches the cross-sectional shape of the limiting rail 323, such as a T-groove, dovetail groove, or any other structure. The lower mold 21 and the limiting rail 323 are connected through a sliding fit. When the lower mold 21 needs to be replaced to accommodate the casting requirements of different chamber castings, the operator can lift the lower mold 21 longitudinally (perpendicular to the bottom surface of the casting space 20a) to disengage its limiting groove 211 from the limiting rail 323, thus disassembling the old lower mold 21. Then, the new lower mold 20 is slid longitudinally into the limiting rail 323 until its limiting groove 211 is fully engaged with the limiting rail 323, quickly completing the assembly of the new lower mold 21.

[0042] In one specific embodiment, the transverse pressing mechanism 30 further includes: a second hydraulic cylinder 324, wherein the lower mold 21 and the insert 31 are disposed on the same side of the transverse push plate 321, the first hydraulic cylinder 322 and the second hydraulic cylinder 324 are respectively disposed on the other side of the transverse push plate 321, the second hydraulic cylinder 324 corresponds to the position of the lower mold 21 and is located on the side of the transverse push plate 321 away from the lower mold 21, and the second hydraulic cylinder 324 corresponds to the position of the insert 31 and is located on the side of the transverse pressing plate away from the insert 31.

[0043] The output end of the second hydraulic cylinder 324 passes through the horizontal push plate 321 and is connected to the insert 31. The second hydraulic cylinder 324 is fixed on the horizontal push plate 321. The second hydraulic cylinder 324 drives the insert 31 to move closer to or away from the horizontal push plate 321 in a lateral direction. When the insert 31 moves closer to the horizontal push plate 321, the insert 31 partially exits between the two lower mold pieces 21, creating a retraction gap 20b. The first hydraulic cylinder 322 pushes the horizontal push plate 321 to move laterally closer to the casting space 20a, so as to simultaneously drive the insert 31 and the lower mold piece 21 to move closer to the casting space 20a. During the approach, the lower mold piece 21, which is in contact with the semi-solid aluminum in the casting space 20a, squeezes the semi-solid aluminum.

[0044] Specifically, the first hydraulic cylinder 322 drives the transverse push plate 321 and all its connected components to perform lateral feeding motion, providing a large main extrusion force. The second hydraulic cylinder 324 specifically and independently drives the insert 31, controlling its retraction and repositioning. The second hydraulic cylinder 324 is fixed to the transverse push plate 321, so that when the first hydraulic cylinder 322 pushes the transverse push plate 321 to move laterally, the second hydraulic cylinder 324 moves along with it. Furthermore, the piston rod of the second hydraulic cylinder 324 can extend and retract independently of the movement of the transverse push plate 321, allowing the piston rod to pass through the transverse push plate 321 and directly drive the insert 31, enabling relative movement of the insert 31 relative to the transverse push plate 321.

[0045] When lateral pressing is required, the second hydraulic cylinder 324 actuates, retracting its piston rod to pull the insert 31 back towards the transverse push plate 321, i.e., moving the insert 31 away from the side of the casting space 20a. This causes the insert 31 to partially retract from its original position between the two lower mold pieces 21, thereby forming a critical retraction gap 20b. At this time, the lower mold piece 21 releases the lateral constraint held by the two adjacent inserts 31.

[0046] After the insert 31 retraction gap 20b is formed, the first hydraulic cylinder 322 is immediately activated, pushing the entire transverse push plate 321, and causing the second hydraulic cylinder 324 fixed on it, as well as the lower mold 21 connected by the slide rail 931 and the insert 31 pulled back by the second hydraulic cylinder 324, to move as a whole towards the casting space 20a. During the movement, the working surface of the lower mold 21 will first contact and begin to compress the semi-solid aluminum casting. Since the insert 31 has been pre-pulled back, although it moves synchronously at this stage, it does not contact the casting, and a gap is maintained between its front end face and the side wall of the casting (i.e., the transformation form of the retraction gap 20b). The first hydraulic cylinder 322 continues to push, and the lower mold 21 continues to compress the casting, causing it to undergo plastic deformation.

[0047] In this embodiment, the extrusion stroke ends when the retraction gap 20b is completely eliminated—that is, the lower die 21 moves outward until its side surface is once again in close contact with the end face of the insert 31, which has been pulled back by the second hydraulic cylinder 324. At this point, the insert 31 once again becomes a rigid support for the lower die 21. If necessary, the second hydraulic cylinder 324 can extend its piston rod to push the insert 31 forward to its final position flush with the surface of the casting.

[0048] In one specific embodiment, the horizontal push plate 321 includes: a flat plate portion 3211 and an inclined plate portion 3212.

[0049] The flat plate 3211 has one side connected to the output end of the first hydraulic cylinder 322 and the other side connected to the limiting slide rail 323. The side of the flat plate 3211 connected to the output end of the first hydraulic cylinder 322 is denoted as side a, and the side of the flat plate 3211 connected to the limiting slide rail 323 is denoted as side b.

[0050] The inclined plate portion 3212 is integrally formed with the flat plate portion 3211, and one side is connected to the second hydraulic cylinder 324, while the other side faces the insert 31. The side of the inclined plate portion 3212 connected to the second hydraulic cylinder 324 is denoted as c-side c, and the side of the inclined plate portion 3212 facing the insert 31 is denoted as d-side d.

[0051] Viewed longitudinally, surface b and surface d are coplanar, surface a and surface c form an angle, and surface b and surface d are perpendicular to the direction of the semi-solid aluminum in the casting space 20a of the lower mold 21 in the lateral direction, and surface a and surface c are perpendicular to the direction of the insert 31 moving part exiting the lower mold 21 in the lateral direction.

[0052] Specifically, the push plate 321 is structurally divided into two functional areas. The flat plate portion 3211 is mainly responsible for transmitting the enormous thrust of the first hydraulic cylinder 322, while the inclined plate portion 3212 is mainly used for mounting and supporting the second hydraulic cylinder 324. One-piece molding eliminates the connection gap between the flat plate portion 3211 and the inclined plate portion 3212, avoiding force transmission deviation caused by gap deformation during extrusion, and simultaneously improving the overall rigidity of the push plate 321. Furthermore, the flat plate portion 3211 of the horizontal push plate 321 serves as the connecting carrier between the first hydraulic cylinder 322 and the limiting slide rail 323. Its a-side a and b-side b are connected by a flat plate structure to ensure the planar stability of force transmission. The driving force of the first hydraulic cylinder 322 is transmitted vertically to the flat plate portion 3211 through a-side a, and then evenly to the limiting slide rail 323 through b-side b, thus avoiding the lower mold part 21 from moving skewed or the limiting slide rail 323 from deforming due to the skew of the force transmission direction.

[0053] The inclined plate portion 3212 and the flat plate portion 3211 are integrally formed. The c-surface and d-surface of the inclined plate portion 3212 are designed with an inclination to optimize the independent drive path of the second hydraulic cylinder 324. The driving force of the second hydraulic cylinder 324 is transmitted to the inclined plate portion 3212 at a certain angle through the c-surface, and then acts perpendicularly on the insert 31 through the d-surface. This inclination layout not only avoids direct interference between the second hydraulic cylinder 324 and the first hydraulic cylinder 322 on the same side of the push plate 321, but also shortens the force transmission distance from the second hydraulic cylinder 324 to the insert 31 through the angle design, thereby improving the force transmission efficiency.

[0054] From a longitudinal perspective, the coplanar design of surface b and surface d ensures the alignment of the limiting slide rail 323 and the insert 31: the limiting slide rail 323 connected to surface b guides the lower mold 21 to move laterally, and the insert 31 facing surface d needs to cooperate with the lower mold 21 to form a retraction gap 20b. The coplanar layout ensures that the movement trajectories of the two are consistent in the longitudinal (vertical) direction, avoiding collisions or uneven compression between the lower mold 21 and the insert 31 due to misalignment. At the same time, the angle (such as an acute or obtuse angle) formed by surface a and surface c is adapted to the installation angle of the second hydraulic cylinder 324, so that its output end can act perpendicularly on surface c of the inclined plate 3212, avoiding additional stress or efficiency loss caused by the skewed installation angle of the hydraulic cylinder.

[0055] In one specific embodiment, the number of the inserts 31 corresponds to the number of the lower molds 21. Each horizontal push plate 321 is connected to one insert 31 and one lower mold 21, or each horizontal push plate 321 is connected to one lower mold 21 and two inserts 31 symmetrically connected to both sides of the lower mold 21. Viewed longitudinally, when the insert 31 is inserted laterally between two adjacent lower molds 21 and abuts against the casting space 20a, the inner circumferential sides of the lower molds 21 and the insert 31 are connected to each other to form a circumferentially closed space 40. The casting space 20a is formed within the closed space 40. The longitudinal pressing mechanism 11 is arranged longitudinally directly above the closed space 40. When the upper mold 10 descends into the closed space 40 and is fitted with the lower mold 20 to form the casting space 20a, the longitudinal pressing mechanism 11 forms a seal above the casting space 20a in the longitudinal direction. When the horizontal pressing mechanism 30 and the vertical pressing mechanism 11 alternately press the semi-solid aluminum in the casting space 20a, when either of them presses the casting space 20a, the other of them either remains in contact with the casting space 20a or exits the casting space 20a.

[0056] Specifically, the number of inserts 31 corresponds to the number of lower mold parts 21, ensuring that there is an insert 31 between each pair of adjacent lower mold parts 21. This prevents the gap between the lower mold parts 21 from being unobstructed due to the absence of inserts 31, thus preventing the aluminum liquid from leaking from the gap during casting. At the same time, it ensures that each lower mold part 21 has a corresponding insert 31 to provide a retraction gap 20b and limit during lateral extrusion, ensuring the consistency of the movement of the lower mold parts 21.

[0057] All lower mold parts 21 and all inserts 31 are tightly connected through their inner circumferences, forming a continuous, complete, and uninterrupted closed annular cavity, i.e., the enclosed space 40. The longitudinal pressing mechanism 11 is arranged directly above the enclosed space 40. When the upper mold 10 descends into the enclosed space 40 and is in clearance fit with the lower mold 20, the longitudinal pressing part 111 of the longitudinal pressing mechanism 11 contacts the top surface of the upper mold 10, forming a longitudinal seal above the casting space 20a, which together with the lower mold 20 and the inserts 31 constitutes the complete casting space 20a. Molten aluminum is injected into the lower part of this casting space 20a through the riser pipe 50, thereby forming the shape of the casting, so that the longitudinal and transverse extrusion forces can be concentrated on the semi-solid aluminum in the casting space 20a.

[0058] In one specific embodiment of this application, the longitudinal pressing mechanism 11 includes a longitudinal pressing member 111, a third hydraulic cylinder 112, and a connecting flange 113.

[0059] The longitudinal pressing member 111 is fitted onto the outer circumferential surface of the upper mold 10 and extends longitudinally downward into the casting space 20a. Together with the upper mold 10, it seals the top of the enclosed area, and independently seals the top of the casting space 20a. The third hydraulic cylinder 112 pushes the longitudinal pressing member 111 to longitudinally compress the semi-solid aluminum within the casting space 20a, or pulls the longitudinal pressing member 111 out of the casting space 20a. One end of the connecting flange 113 is connected to the longitudinal pressing member 111, and the other end is connected to the output end of the third hydraulic cylinder 112.

[0060] Specifically, the longitudinal pressing component 111 is a ring-shaped member fitted onto the outer periphery of the upper mold 10. The shape of the longitudinal pressing component 111 matches the top of the casting space 20a, thereby sealing the top opening of the casting space 20a. The longitudinal pressing component 111 independently seals the top of the casting space 20a, forming a bidirectional pressure constraint with the pressure-holding plug during the pressure-holding stage. This prevents localized shrinkage at the top of the casting space 20a due to insufficient pressure, especially for the thin-walled section at the top of the missile hull, ensuring stable pressure during the solidification of the molten aluminum in that area. From an extrusion function perspective, the design of the longitudinal pressing component 111 extending into the casting space 20a allows it to directly act on the semi-solid aluminum, thereby directly transmitting the thrust of the third hydraulic cylinder 112 to the semi-solid aluminum, achieving the extrusion of the semi-solid aluminum. From the perspective of power transmission, the connecting flange 113 adopts a rigid connection design, which can avoid flexible deformation during the power transmission process, ensure that the thrust or pull of the third hydraulic cylinder 112 is directly transmitted to the longitudinal pressing member 111, and ensure that the longitudinal pressing member 111 has no radial wobble when it moves longitudinally.

[0061] It should be noted that the first hydraulic cylinder 322 and the third hydraulic cylinder 112 have different output connections. The first hydraulic cylinder 322 is specifically responsible for controlling the precise movement of the pressure-holding plug, including pulling the pressure-holding plug back and locking it in the first anti-pull tube before filling, and pushing the pressure-holding plug into the riser nozzle and maintaining high pressure after filling. The third hydraulic cylinder 112 is specifically responsible for controlling the movement of the longitudinal pressing member 111, that is, pressing the semi-solid aluminum downward at the appropriate time to assist in feeding, and pulling the longitudinal pressing member 111 out of the casting space 20a during the demolding stage. Each hydraulic cylinder can be driven independently according to its own task requirements, thereby avoiding the control problems and reliability risks caused by a single power source having to perform multiple complex actions.

[0062] In another specific embodiment of this application, the structure further includes a riser pipe 50, a riser furnace 60, a casting platform 70, and a lifting platform 80.

[0063] One end of the riser pipe 50 is connected to the riser nozzle inside the lower mold 20. The riser furnace 60 is located below the lower mold 20 and is connected to the other end of the riser pipe 50. Liquid aluminum settles in the riser furnace 60. The liquid aluminum settled at the bottom is extracted, and air pressure is used to make the liquid aluminum rise along the riser pipe 50 into the casting space 20a.

[0064] The lower mold 20 is fixed on the casting platform 70, and the liquid lifting furnace 60 is located below the casting platform 70. The lifting platform 80 is located directly above the casting platform 70, and the upper mold 10 is fixed on the side of the lifting platform 80 near the casting platform 70; the third hydraulic cylinder 112 is located inside the lifting platform 80.

[0065] Before casting, the lifting platform 80 lowers the upper mold 10 into the lower mold 20, and after casting is completed, it raises the upper mold 10 so that the cabin casting, which has been further cooled to solid aluminum, separates from the lower mold 20 in the longitudinal direction.

[0066] Specifically, the riser pipe 50 serves as the core channel connecting the riser nozzle of the lower mold 20 and the riser furnace 60. Its length matches the installation distance between the riser furnace 60 and the lower mold 20, allowing the riser pipe 50 to extend into the bottom of the riser furnace 60. Furthermore, the riser pipe 50 creates a closed transport path for the molten aluminum from the riser furnace 60 to the casting space 20a, preventing the molten aluminum from contacting air during its ascent and reducing oxidation inclusions in the molten aluminum.

[0067] Furthermore, the riser furnace 60 also functions as a heat preservation, purification, and pressure source chamber. Liquid aluminum is allowed to settle and stratify within the riser furnace 60, causing slag or oxides to float to the top and heavy impurities to sink to the bottom. This creates a relatively clean liquid extraction zone at the bottom of the riser furnace 60. After the riser furnace 60 is pressurized in a controlled manner, it pushes the molten aluminum up along the riser pipe 50. The molten metal extracted from the bottom is used for filling the mold, ensuring that the first molten metal to enter the mold cavity is of the highest purity and with the fewest oxides and impurities. This will directly improve the metallurgical quality and mechanical properties of the final casting.

[0068] The casting platform 70 is responsible for the installation and positioning of the lower mold 20, the liquid riser, and the lower liquid riser furnace 60, ensuring that the lower mold 20 will not shift or tilt after being fixed, thus guaranteeing a precise clearance fit when the upper mold 10 and the lower mold 20 are closed, providing support for the contour of the casting space 20a. Simultaneously, the liquid riser is directly located on the casting platform 70 within the area enclosed by the lower mold 20. This integrated design fixes the relative position of the liquid riser and the lower mold 20, avoiding the aluminum molten filling deviation caused by misalignment between the liquid riser and the lower mold 20 in traditional separate installations. Furthermore, the lifting platform 80 is located directly above the casting platform 70, with the upper mold 10 fixed on its side closest to the casting platform 70, ensuring that the upper mold 10 can be lifted and lowered via the lifting platform 80.

[0069] Before casting, the lifting platform 80 can smoothly drive the upper mold 10 down to ensure that the upper mold 10 accurately enters the lower mold 20 and forms a preset gap fit; after casting, it can drive the upper mold 10 up to separate the cabin casting, which has been further cooled to solid aluminum, from the lower mold 20 in the longitudinal direction, laying the foundation for the subsequent demolding process.

[0070] In another specific embodiment of this application, the structure further includes a pressure-bearing base 941 and a hydraulic control tower 911.

[0071] The pressure-bearing base 941 is cast and has a concave center forming a U-shape. The casting platform 70 is fixed to the two protruding ends of the pressure-bearing base 941, and the liquid-lifting furnace 60 is located in the concave area of ​​the pressure-bearing base 941.

[0072] The hydraulic control tower 911 is mounted on the pressure-bearing base 941 and located above the casting platform 70. The lifting platform 80 is longitudinally slidable between the hydraulic control tower 911 and the casting platform 70. The hydraulic control tower 911 provides power to drive the lifting platform 80 to slide and rise longitudinally between the hydraulic control tower 911 and the casting platform 70.

[0073] Specifically, the pressure-bearing base 941 is a monolithically cast giant component with a concave design in its middle, forming a huge recessed space. By embedding the heavy liquid-lifting furnace 60 into it, this structure reduces the equipment's footprint through the utilization of longitudinal space. The protruding ends of the pressure-bearing base 941 provide an extremely stable mounting surface for the upper casting platform 70.

[0074] Furthermore, the integrated cast base has extremely high rigidity and stability, preventing accidents from occurring between the liquid-lifting furnace 60 and the mechanism set on the pressure-bearing area 94. This allows the huge reaction force generated during mold closing and internal pressurization to be evenly distributed and absorbed, effectively suppressing the elastic deformation of the overall machine body.

[0075] Furthermore, a hydraulic control tower 911 is erected on a pressure-bearing base 941. The hydraulic control tower 911 is the power center driving the entire forming cycle. It provides a strongly controlled vertical driving force to the lifting platform 80 connected to it through a hydraulic system. The lifting platform 80 slides longitudinally within the guide frame formed by the hydraulic control tower 911 and the casting platform 70 below.

[0076] In another specific embodiment of this application, the structure further includes a main base 90 and a tilting furnace 921.

[0077] The main base 90 is cast in the form of a first platform 91, a second platform 92 formed by a downward indentation from the first platform 91, a third platform 93 formed by a downward indentation from the second platform 92, and a pressure-bearing area 94 extending longitudinally. The pressure-bearing base 941 is cast in the pressure-bearing area 94, and the indented area of ​​the pressure-bearing area 94 is flush with the third platform 93.

[0078] A tilting furnace 921 is mounted on the second platform 92. A slide rail 931 is provided between the third platform 93 and the recessed area of ​​the pressure-bearing platform. The lifting furnace 60 moves to the recessed area below the casting platform 70 or to the third platform 93 via the slide rail 931. The tilting furnace 921 on the second platform 92 pours liquid aluminum into the lifting furnace 60. The lifting furnace 60 then moves along the guide rail to the area below the casting platform 70 and extracts the liquid aluminum that has settled at the bottom into the casting space 20a for casting.

[0079] Specifically, the first platform 91 serves as a reference plane and working surface, allowing operators to walk safely on it and perform operations such as mold cleaning and equipment inspection. The second platform 92 is formed by a downward indentation from the first platform 91. Its main function is to accommodate and support the tilting furnace 921 and serve as the working surface for operating the tilting furnace 921, isolating the hazardous hot metal operations from the main working area. A robust pressure-bearing base 941 is cast within the pressure-bearing area 94 that runs through the main base 90. Its recessed area connects to the third platform 93 via a slide rail 931, allowing the lifting furnace 60, which carries liquid aluminum, to move automatically between the preparatory position and the working position.

[0080] The height difference between the pressure-bearing area 94 and the third platform 93 ensures that the liquid furnace 60 has sufficient space to move while avoiding interference and collisions during operation, thus ensuring the safety and reliability of the casting process. Simultaneously, the slide rail 931 allows for smooth and rapid movement of the liquid furnace 60, reducing wasted time during casting and improving production efficiency. Furthermore, the liquid furnace 60 moves along the preset slide rail 931, eventually stopping in the recessed area below the casting platform 70 on the pressure-bearing base 941, thereby connecting the liquid furnace 60 to the liquid inlet of the lower mold 20, and drawing liquid aluminum from the liquid furnace 60 to the liquid inlet. When it is necessary to replenish the liquid in the liquid furnace 60, the liquid furnace 60 is slid onto the third platform 93 along the moving direction of the slide rail 931, and then the tilting furnace 921 pours liquid aluminum into the liquid furnace 60, thus completing the replenishment and extraction process of liquid aluminum.

[0081] By setting a longitudinally sliding mechanical pressure-holding plug at the inlet of the liquid riser, it is inserted immediately after the aluminum liquid is filled to form a high-pressure seal, thereby achieving directional ultra-high pressure feeding. At the same time, a longitudinal pressure mechanism 11 is set on the outer periphery of the upper mold 10 to perform mechanical extrusion to assist feeding in the semi-solid stage. By controlling the timing of lifting and then pushing, the casting is separated without damage. This solves the problem of shrinkage caused by pressure decay and surface damage caused by demolding adhesion in traditional pneumatic feeding.

[0082] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A casting-forging functional structure for improving the strength of cabin castings, characterized in that, Used for casting aluminum hull castings using the liquid-lifting method, the hull castings are formed within the casting space enclosed by the upper and lower molds with a clearance fit; The structure includes: a longitudinal pressing mechanism and a transverse pressing mechanism that alternately press the semi-solid aluminum in the longitudinal direction and in the transverse direction after the aluminum liquid is cooled to a semi-solid aluminum by step cooling in the lower mold; The transverse pressing mechanism is located on the side of the lower mold opposite to the inner mold and is connected to the lower mold. The transverse pressing mechanism includes at least: an insert and a transverse pushing assembly. Viewed longitudinally, the lower mold is composed of multiple adjacent lower mold parts with gaps around the casting space. The insert is embedded laterally between two adjacent lower mold parts and abuts against the casting space. When the insert is partially withdrawn laterally from between the lower mold parts, a retraction gap is generated between the lower mold part and the adjacent insert. The lateral push assembly pushes the lower mold part to squeeze the semi-solid aluminum in the casting space laterally until the retraction gap disappears. The insert forms a lateral obstruction to the lower mold part.

2. The casting and forging functional structure for improving the strength of cabin castings according to claim 1, characterized in that, The lateral push assembly includes: A horizontal push plate is connected to the lower mold component; The first hydraulic cylinder has its output end connected to the horizontal push plate. The first hydraulic cylinder provides power to drive the horizontal push plate to move laterally, so as to push the lower die to extrude semi-solid aluminum in the casting space laterally.

3. The casting and forging functional structure for improving the strength of cabin castings according to claim 2, characterized in that, The lateral push assembly also includes: The limiting slide rail has one end fixed to the side of the horizontal push plate away from the first hydraulic cylinder, and the other end extends longitudinally and forms a sliding connection with the lower mold in the longitudinal direction, and forms a limit in the transverse direction. The lower mold part has a limiting groove at one end near the horizontal push plate that is adapted to the limiting slide rail. When replacing different corresponding lower mold parts for different cabin castings, the lower mold part is lifted longitudinally to remove it from the installation, and then the new lower mold part is guided longitudinally into the limiting slide rail to complete the assembly.

4. The casting and forging functional structure for improving the strength of cabin castings according to claim 1, characterized in that, The transverse pressing mechanism also includes: The second hydraulic cylinder, the lower mold and the insert are located on the same side of the horizontal push plate, the first hydraulic cylinder and the second hydraulic cylinder are respectively located on the other side of the horizontal push plate, the second hydraulic cylinder is positioned opposite to the lower mold and is located on the side of the horizontal push plate away from the lower mold, the second hydraulic cylinder is positioned opposite to the insert and is located on the side of the horizontal pressure plate away from the insert; The output end of the second hydraulic cylinder passes through the push plate and is connected to the insert. The second hydraulic cylinder is fixed on the push plate. The second hydraulic cylinder drives the insert to move closer to or away from the push plate in a lateral direction. When the insert moves closer to the push plate, the insert partially retracts between the two lower mold pieces, creating a retraction gap. The first hydraulic cylinder pushes the push plate in a lateral direction towards the casting space, so as to simultaneously drive the insert and the lower mold pieces towards the casting space. During the approach process, the lower mold pieces, which are in contact with the semi-solid aluminum in the casting space, squeeze the semi-solid aluminum.

5. The casting-forging functional structure for improving the strength of cabin castings according to claim 4, characterized in that, The push plate includes: The flat plate has one side connected to the output end of the first hydraulic cylinder and the other side connected to the limiting slide rail. The side of the flat plate connected to the output end of the first hydraulic cylinder is denoted as side a, and the side of the flat plate connected to the limiting slide rail is denoted as side b. The inclined plate portion is integrally formed with the flat plate portion, and one side is connected to the second hydraulic cylinder, while the other side faces the insert. The side of the inclined plate portion connected to the second hydraulic cylinder is denoted as surface c, and the side of the inclined plate portion facing the insert is denoted as surface d. Viewed longitudinally, surface b is coplanar with surface d, surface a forms an angle with surface c, and surfaces b and d are perpendicular to the direction of the semi-solid aluminum in the lateral extrusion casting space of the lower mold, while surfaces a and c are perpendicular to the direction of the insert moving out of the lower mold in the lateral direction.

6. The casting-forging functional structure for improving the strength of cabin castings according to claim 5, characterized in that, The number of inserts corresponds to the number of lower mold parts. Each horizontal push plate is connected to one insert and one lower mold part, or each horizontal push plate is connected to one lower mold part and two inserts symmetrically connected to both sides of the lower mold part. Viewed longitudinally, when the insert is inserted laterally between two adjacent lower molds and abuts against the casting space, the inner circumferential side of the lower mold and the insert are connected to each other to form a circumferentially closed space. The casting space is formed within the closed space. The longitudinal pressing mechanism is arranged longitudinally directly above the closed space. When the upper mold descends into the closed space and gap-fits with the lower mold to form the casting space, the longitudinal pressing mechanism forms a seal above the casting space in the longitudinal direction. When the horizontal pressing mechanism and the vertical pressing mechanism alternately press the semi-solid aluminum in the casting space, when either of them presses the casting space, the other of them remains in contact with the casting space or exits the casting space.

7. The casting-forging functional structure for improving the strength of cabin castings according to claim 6, characterized in that, The longitudinal compression mechanism includes: The longitudinal pressing component is fitted onto the outer circumferential surface of the upper mold and extends longitudinally downward into the casting space. Together with the upper mold, it seals the top of the closed area and independently seals the top of the casting space. The third hydraulic cylinder pushes the longitudinal pressing member to squeeze the semi-solid aluminum in the casting space along the longitudinal direction, or pulls the longitudinal pressing member out of the casting space; The connecting flange is connected at one end to the longitudinal pressure member and at the other end to the output end of the third hydraulic cylinder.

8. The casting-forging functional structure for improving the strength of cabin castings according to claim 7, characterized in that, The structure also includes: The riser pipe is connected at one end to the riser nozzle inside the lower mold. A liquid riser furnace is located below the lower mold and connected to the other end of the liquid riser pipe. Liquid aluminum settles in the liquid riser furnace. The liquid aluminum settled at the bottom is extracted, and air pressure is used to make the liquid aluminum rise along the liquid riser pipe into the casting space. A casting platform, wherein the lower mold is fixed on the casting platform, and the liquid lifting furnace is located below the casting platform; A lifting platform is located directly above the casting platform, and the upper mold is fixed to the side of the lifting platform near the casting platform; the third hydraulic cylinder is located inside the lifting platform. Before casting, the lifting platform lowers the upper mold into the lower mold, and after casting is completed, it raises the upper mold to separate the cabin casting, which has been further cooled to solid aluminum, from the lower mold in the longitudinal direction.

9. The casting and forging functional structure for improving the strength of cabin castings according to claim 8, characterized in that, The structure also includes: The pressure-bearing base is cast in place, with a concave center forming a U-shape. The casting platform is fixed to both ends of the protruding part of the pressure-bearing base, and the liquid-lifting furnace is located within the concave area of ​​the pressure-bearing base. A hydraulic control tower is mounted on the pressure-bearing base and located above the casting platform. The lifting platform is longitudinally slidable between the hydraulic control tower and the casting platform. The hydraulic control tower provides power to drive the lifting platform to slide and rise longitudinally between the hydraulic control tower and the casting platform.

10. The casting-forging functional structure for improving the strength of cabin castings according to claim 9, characterized in that, The structure also includes: The main base, cast in concrete, includes a first platform, a second platform recessed downward from the first platform, a third platform recessed from the second platform, and a pressure-bearing area extending longitudinally. The pressure-bearing base is cast in the pressure-bearing area, and the recessed area of ​​the pressure-bearing area is flush with the third platform. A tilting furnace is located on the second platform. A slide rail is provided between the third platform and the recessed area of ​​the pressure-bearing platform. The lifting furnace moves along the slide rail to the recessed area below the casting platform or to the third platform. The tilting furnace on the second platform pours liquid aluminum into the lifting furnace. The lifting furnace then moves along the guide rail to the area below the casting platform and extracts the liquid aluminum that has settled at the bottom into the casting space for casting.

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