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CN-121972624-A - Semi-solid die casting method of thin-wall aluminum magnesium alloy for automobile

CN121972624ACN 121972624 ACN121972624 ACN 121972624ACN-121972624-A

Abstract

The invention discloses a semi-solid die-casting method of a thin-wall aluminum magnesium alloy for an automobile, which relates to the technical field of semi-solid die-casting and comprises the following steps of S1, adding the prepared aluminum magnesium alloy into a heat preservation cylinder, starting a rotating motor to stir and shear the aluminum magnesium alloy, simultaneously matching with an electric heating plate, keeping the aluminum magnesium alloy in a semi-solid temperature range, preparing semi-solid slurry, S2, tightly closing a movable die and a positioning die by utilizing an electric control hydraulic rod, and simultaneously sealing one end of a drainage channel.

Inventors

  • CHEN YOUTANG

Assignees

  • 邯郸二宁禾科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260319

Claims (10)

  1. 1. A semi-solid die casting method of a thin-wall aluminum magnesium alloy for an automobile is characterized by comprising the following steps: S1, adding the prepared aluminum-magnesium alloy into a heat preservation cylinder (3) on a chassis (1), starting a rotary motor (501) to stir and shear the aluminum-magnesium alloy, and simultaneously, matching with an electric heating plate (505) to keep the temperature in a semi-solid state temperature range to prepare semi-solid slurry; s2, tightly closing the movable die (420) and the positioning die (421) by utilizing an electric control hydraulic rod (419), and sealing one end of the drainage channel (423); s3, starting an electric control ejector rod (415) to push a sealing cover plate (416) to ascend, opening a discharging channel (412), enabling semi-solid slurry to flow into a quantitative injection cylinder (402), pushing a supporting ejector rod (406) to be in contact with a touch switch (411) by a liquid level pressure cylinder (408) under the action of hydraulic pressure when the liquid level reaches a preset height, controlling the electric control ejector rod (415) to shrink, and closing the discharging channel (412); s4, starting a hydraulic injection push rod (403) to extend, pushing a piston push plate (404) to move in the quantitative injection cylinder (402), and injecting quantitative semi-solid slurry into a die cavity formed by a molding template (422) at high pressure through a drainage channel (423); S5, performing rapid cooling and heat exchange by utilizing the cooperation of a water supply pump (513), a water suction pipe (512), a shunt pipe (514) and a heat exchange pipe (515), heating warm water after heat exchange, and then sending the warm water into an arc-shaped heat preservation cover (508) to perform short-time heat preservation on the slurry in the quantitative injection cylinder (402); S6, after the casting is cooled, solidified and formed, the electric control hydraulic rod (419) is controlled to shrink, the movable die (420) is driven to be separated from the positioning die (421), and in the separation process, the fixed partition plate (418) extrudes the demoulding rod (424) to eject the thin-wall casting formed in the movable die (420).
  2. 2. The semi-solid die casting method of the thin-wall aluminum magnesium alloy for the automobile, which is characterized in that a cylinder frame (2) is arranged at the top end of the underframe (1), a heat preservation cylinder (3) is clamped in the cylinder frame (2), a quantitative injection die casting mechanism (4) is arranged at the top end of the underframe (1), and the quantitative injection die casting mechanism (4) comprises a concave support (401); The novel quantitative injection device is characterized in that concave supports (401) are clamped at the top end of the underframe (1) at equal intervals, a quantitative injection cylinder (402) is arranged in one concave support (401), a hydraulic injection push rod (403) is clamped in the other concave support (401), and a piston push plate (404) is clamped at one end of the hydraulic injection push rod (403); The quantitative injection tube is characterized in that a storage vertical tube (405) is clamped at the bottom end of the quantitative injection tube (402), a supporting ejector rod (406) is movably connected at the bottom end of the storage vertical tube (405), a liquid level pressure tube (408) is clamped at the top end of the supporting ejector rod (406), an elastic adjusting ring (407) is sleeved on the outer side of the supporting ejector rod (406) through threads, and liquid level supporting springs (409) are clamped on the outer sides of the corresponding supporting ejector rods (406) between the elastic adjusting ring (407) and the storage vertical tube (405); the U-shaped frame (410) is clamped at the outer side of the storage vertical barrel (405), and the touch switch (411) is clamped inside the U-shaped frame (410).
  3. 3. The method for semi-solid die casting of thin-wall aluminum magnesium alloy for automobile as claimed in claim 2, wherein the outer side of the piston push plate (404) is in sliding fit with the inner wall of the quantitative injection cylinder (402), the outer side of the liquid level pressure cylinder (408) is in fit with the inner wall of the storage vertical cylinder (405), the top end of the elastic force adjusting ring (407) is rotationally connected with a rotating pad, and the hydraulic injection push rod (403) and the touch switch (411) are powered by an external power supply.
  4. 4. The semi-solid die casting method of the thin-wall aluminum magnesium alloy for the automobile according to claim 2, wherein a blanking channel (412) is clamped at the bottom end of the heat preservation cylinder (3), a feeding pipe (413) is clamped at the bottom end of the blanking channel (412), a positioning ring (414) is fixedly sleeved outside the feeding pipe (413), electric control ejector rods (415) are clamped at the top ends of the positioning ring (414) at equal intervals, a sealing cover plate (416) is clamped at the top ends of the electric control ejector rods (415), and a cross baffle frame (417) is clamped at the bottom of the inner wall of the blanking channel (412) corresponding to the sealing cover plate (416); the novel electric control hydraulic pressure pipe comprises a bottom frame (1), wherein one side of the top end of the bottom frame (1) is clamped with a fixed partition plate (418), electric control hydraulic pressure pipes (419) are clamped in the fixed partition plate (418) at equal intervals, one end of each electric control hydraulic pressure pipe (419) is clamped with a movable mold (420), one end of each cylinder frame (2) is clamped with a positioning mold (421), the movable molds (420) and the positioning molds (421) are internally clamped with a forming mold plate (422), and the bottoms of the positioning molds (421) are internally clamped with drainage channels (423); One end of the movable die (420) is movably connected with a demoulding rod (424) at equal intervals, and a reset spring (425) is sleeved outside the demoulding rod (424).
  5. 5. The method for semi-solid die casting of aluminum magnesium alloy with thin wall for automobile as claimed in claim 4, wherein the top end of the electric control ejector rod (415) penetrates through the top ends of the blanking channel (412) and the cross baffle frame (417), the electric control ejector rod (415) is powered by an external power supply, and the signal output end of the touch switch (411) is connected with the input end of the electric control ejector rod (415).
  6. 6. The method for semi-solid die casting of aluminum magnesium alloy with thin wall for automobile as claimed in claim 4, wherein the electric control hydraulic rod (419) is powered by an external power supply, one end of the demoulding rod (424) and one end of the forming template (422) inside the movable mould (420) are both located on the same vertical plane, and one end of the demoulding rod (424) is clamped with a baffle.
  7. 7. The semi-solid die casting method of the thin-wall aluminum magnesium alloy for the automobile according to claim 4, wherein a mixing and circulating heat exchange mechanism (5) is arranged in the heat preservation cylinder (3), and the mixing and circulating heat exchange mechanism (5) comprises a rotating motor (501); The top end of the heat preservation cylinder (3) is clamped with a rotating motor (501), the bottom end of an output shaft of the rotating motor (501) is clamped with a stirring rod (502), and the outer side of the stirring rod (502) is equidistantly clamped with stirring rotary blades (503); the bottom end of the cylinder frame (2) is correspondingly clamped with a thermal insulation sleeve (504) outside the thermal insulation cylinder (3), electric heating plates (505) are equidistantly arranged inside the thermal insulation sleeve (504), a heat exchange channel (506) is clamped at the outer side of the thermal insulation sleeve (504), and a communicating elbow (507) is clamped at the bottom of one end of the heat exchange channel (506); the bottom end of the quantitative injection cylinder (402) is clamped with an arc-shaped heat preservation cover (508), one end of the outer side of the arc-shaped heat preservation cover (508) is clamped with a water outlet pipe (509), and the bottom end of the water outlet pipe (509) is equidistantly clamped with a cooling pipe (510); The top end of the underframe (1) is clamped with a water storage tank (511), one end of the water storage tank (511) is clamped with a water pumping pipe (512), and a water supply pump (513) is arranged outside the water pumping pipe (512); One end of the positioning die (421) is symmetrically clamped with the split pipes (514), one end of each split pipe (514) is uniformly clamped with the heat exchange pipe (515), and one end of each split pipe (514) is clamped with the return pipe (516).
  8. 8. The method for semi-solid die casting of thin-wall aluminum magnesium alloy for automobile as claimed in claim 7, wherein the rotating motor (501) and the electric heating plate (505) are powered by an external power supply, a feeding pipe is clamped at the top end of the heat preservation cylinder (3), the position of the heat exchange channel (506) corresponds to the installation position of the electric heating plate (505), and a heat conduction baffle is installed at the joint of the heat exchange channel (506) and the electric heating plate (505).
  9. 9. The method for semi-solid die casting of aluminum magnesium alloy with thin wall for automobile as claimed in claim 7, wherein one end of the communicating elbow (507) is connected with one end of the arc-shaped heat preservation cover (508), a heat preservation chamber is formed between the arc-shaped heat preservation cover (508) and the quantitative injection cylinder (402), and the bottom end of the cooling pipe (510) is connected with the top end of the water storage tank (511).
  10. 10. The method of semi-solid die casting of aluminum magnesium alloy with thin wall for automobile as claimed in claim 7, wherein the water supply pump (513) is powered by an external power source, the other end of the water suction pipe (512) is connected with one end of another shunt pipe (514), the other end of the return pipe (516) is connected with the top of one end of the heat exchanging channel (506), and one end of the heat exchanging pipe (515) passes through the inside of the positioning die (421).

Description

Semi-solid die casting method of thin-wall aluminum magnesium alloy for automobile Technical Field The invention relates to the technical field of semi-solid die casting, in particular to a thin-wall aluminum magnesium alloy semi-solid die casting method for an automobile. Background The metal semi-solid forming comprises two modes of rheoforming and thixotropic forming, wherein the rheoforming refers to cooling metal melt to a semi-solid temperature range, semi-solid slurry is prepared through modification treatment, intense stirring, vibration and other modes, so that the semi-solid slurry is directly used for forming, as disclosed in the prior art, the semi-solid slurry of aluminum magnesium alloy is prepared and formed in situ, the application number is CN20201000508 8.1.1, and the semi-solid slurry forming and process stability are improved by effectively reducing heat loss in the semi-solid slurry transfer process, and the time required by electromagnetic induction heating preparation of the semi-solid slurry is shortened; However, when the semi-solid slurry is conveyed, quantitative conveying cannot be performed, a phenomenon of excessive feeding at one time is easy to occur, so that the effect after the subsequent die casting molding is affected, in addition, heat cannot be recycled, the heat preservation effect of the semi-solid slurry is poor, and solidification is easy to occur in advance, so that in order to avoid the technical problems, it is necessary to provide a thin-wall aluminum magnesium alloy semi-solid die casting method for an automobile to overcome the defects in the prior art. Disclosure of Invention The invention provides a semi-solid die-casting method of a thin-wall aluminum magnesium alloy for an automobile, which can effectively solve the problems that when semi-solid slurry is conveyed in the background technology, quantitative conveying cannot be carried out, excessive feeding is easy to occur at one time, the effect after the subsequent die-casting forming is affected, heat cannot be recycled, the heat preservation effect of semi-solid slurry is poor, and solidification is easy to advance. In order to achieve the purpose, the invention provides the following technical scheme that the semi-solid die casting method of the thin-wall aluminum magnesium alloy for the automobile comprises the following steps: s1, adding the prepared aluminum-magnesium alloy into a heat preservation cylinder on a bottom frame, starting a rotating motor to stir and shear the aluminum-magnesium alloy, and simultaneously, matching with an electric heating plate, and keeping the temperature in a semi-solid state temperature range to prepare semi-solid slurry; s2, tightly closing the movable die and the positioning die by utilizing an electric control hydraulic rod, and sealing one end of the drainage channel; s3, starting an electric control ejector rod to push a sealing cover plate to ascend, opening a discharging channel, enabling semi-solid slurry to flow into a quantitative injection cylinder, and when the liquid level reaches a preset height, pushing a supporting ejector rod to contact with a touch switch by a liquid level pressure cylinder under the action of hydraulic pressure, controlling the electric control ejector rod to shrink, and closing the discharging channel; S4, starting a hydraulic injection push rod to extend, pushing a piston push plate to move in the quantitative injection cylinder, and injecting quantitative semi-solid slurry into a mold cavity formed by a molding template through a drainage channel under high pressure; S5, performing rapid cooling heat exchange by utilizing the cooperation of a water supply pump, a water suction pipe, a split pipe and a heat exchange pipe, and sending heated warm water after heat exchange into an arc-shaped heat preservation cover to perform short-time heat preservation on the slurry in the quantitative injection cylinder; S6, after the casting is cooled, solidified and formed, controlling the electronic control hydraulic rod to shrink, driving the movable die to separate from the positioning die, and extruding the demoulding rod by the fixed partition plate in the separation process, so as to eject the thin-wall casting formed in the movable die. According to the technical scheme, the cylinder frame is mounted at the top end of the bottom frame, the heat-preserving cylinder is clamped in the cylinder frame, the quantitative injection die-casting mechanism is arranged at the top end of the bottom frame and comprises a concave support; the bottom frame is characterized in that concave supports are clamped at the top end of the bottom frame at equal intervals, a quantitative injection cylinder is arranged in one concave support, a hydraulic injection push rod is clamped in the other concave support, and a piston push plate is clamped at one end of the hydraulic injection push rod; the quantitative injection tube is characterized in that the bottom