An ultra-thin flat plate large frame casting process

Abstract

The application belongs to the field of casting process, and discloses a super-thin flat plate large-frame casting process, which comprises the following steps: metal liquid is supplied to a plurality of horizontal pouring pools through a plurality of straight sprues by a plurality of feeding pipes, and the plurality of horizontal pouring pools divide a mold into various regions; the metal liquid is introduced into a mold cavity through various connecting nodes of the mold by a plurality of ingates; in the stage of injecting the metal liquid into the mold cavity, a temperature monitoring assembly monitors temperature signals of various regions of the mold and feeds the signals back to a controller, the controller controls a flow control assembly and a graphene heating film corresponding to each region, the flow of the corresponding feeding pipe and the flow rate are adjusted through the flow control assembly, the temperature of the corresponding region is adjusted through the graphene heating film, and at this time, a phase change heat storage unit absorbs excess heat and stores the heat; in the stage of solidification and shrinkage of the metal liquid, the controller controls the phase change heat storage unit to release latent heat to compensate for sudden temperature drop. The application solves the problem of uneven filling of metal liquid in different regions of the mold cavity.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of ultra-thin flat plate large frame casting process, belong to casting process field. BACKGROUND

[0002] Casting aluminum alloy frame is widely used in manufacturing flat plate satellite and other large thin-walled complex frame class aluminum alloy components due to its high production efficiency, good mechanical properties, good surface uniformity, easy to guarantee size, low production cost and strong process adaptability to complex structure.

[0003] But due to the size of this component, thin wall, structure is very complex, in existing casting process, when injecting aluminum liquid, there will be aluminum liquid flow rate fast and high temperature in the area close to the gate in the mold cavity, so as to condense slowly, while the aluminum liquid flow rate is slow and the temperature is low in the area far away from the gate, so as to condense rapidly. That is, the existing integral casting process appears the problem of uneven flow rate and temperature in the metal liquid filling process, which leads to the decline of product quality. SUMMARY

[0004] The present application aims to provide an ultra-thin flat plate large frame casting process, solve the problem of uneven metal liquid filling in different areas of the existing mold cavity, and improve the product forming quality.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0006] An ultra-thin flat plate large frame casting process, using pouring system for casting;

[0007] The pouring system comprises a plurality of feed pipes, a flow control assembly arranged in the plurality of feed pipes, a straight gate corresponding to the plurality of feed pipes, a cross gate communicated with the plurality of straight gates, a cross pouring pool connected with the cross gate and corresponding to the plurality of straight gates, a plurality of inner gates arranged on the cross pouring pool and connected with each connection node of the mold, a graphene heating film arranged in each area of the top of the mold and a temperature monitoring assembly, a phase change heat storage unit arranged in each area of the bottom of the mold, and a controller electrically connected with the flow control assembly, the graphene heating film, the temperature monitoring assembly and the phase change heat storage unit;

[0008] The ultra-thin flat plate large frame casting process comprises the following steps:

[0009] The plurality of feed pipes supply metal liquid to the plurality of cross pouring pools through the plurality of straight gates, and the plurality of cross pouring pools divide the mold into each area;

[0010] The plurality of inner gates introduce the metal liquid into the mold cavity through each connection node of the mold;

[0011] In the metal liquid injection cavity stage, the temperature signals of each region of the mold are monitored by the temperature monitoring assembly and fed back to the controller, the flow control assembly and the graphene heating film corresponding to each region are controlled by the controller, the flow and flow rate of the corresponding feeding pipe are adjusted by the corresponding flow control assembly, and the temperature of the corresponding region is adjusted by the corresponding graphene heating film, at this time the phase change heat storage unit absorbs excess heat and stores it;

[0012] In the metal liquid solidification shrinkage stage, the phase change heat storage unit releases latent heat to compensate for the temperature drop.

[0013] By setting a plurality of feeding pipes in one-to-one correspondence with a plurality of sprues, it is convenient to supply each region of the mold separately; by setting flow control assemblies in a plurality of feeding pipes, it is convenient to regulate the flow rate of the metal liquid injected into each region of the mold; by setting a plurality of horizontal runner pools to divide the mold into regions, it is convenient to regulate the flow rate and temperature of the aluminum liquid in the mold, and the regulation is more convenient and accurate; by setting the graphene heating film, the temperature monitoring assembly, the phase change heat storage unit and the controller in mutual coordination, it is convenient to dynamically control the temperature of the aluminum liquid in the mold. Through the coordination of each component in the pouring system for casting, the present application solves the problem of uneven filling of metal liquid in different regions of the existing mold cavity, and improves the quality of product forming.

[0014] Further, the flow control assembly includes an electric push rod electrically connected to the controller and a valve plate connected to the electric push rod, and the valve plate is slidingly arranged in the feeding pipe.

[0015] Further, the temperature monitoring assembly includes a temperature sensor and / or an infrared thermal imager.

[0016] Further, a plurality of exhaust risers are provided on the mold.

[0017] Further, a plurality of sprues are uniformly distributed on the horizontal runner, and a plurality of horizontal runner pools are connected to the horizontal runner by pipes to be in one-to-one correspondence with the plurality of sprues.

[0018] Further, a plurality of feeding pipes are in communication with a tank containing metal liquid, the side wall of the tank is provided with a heat preservation layer, and the bottom of the tank is provided with a heating unit.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The present application ensures that the flow rate and temperature of the metal liquid in different regions of the mold cavity are uniform, ensures that the metal liquid can smoothly, quickly and uniformly fill the cavity, avoids problems such as cold separation, insufficient pouring and residual stress concentration, and improves the quality of product forming. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1is a perspective structural schematic diagram of an embodiment of the pouring system described in the present application;

[0022] Fig. 2 is a front structural schematic diagram of an embodiment of the pouring system described in the present application.

[0023] In the figure: 1, a pool; 2, a feeding pipe; 3, a flow control assembly; 4, a sprue; 5, a runner; 6, a runner pool; 7, an ingate. DETAILED DESCRIPTION

[0024] The present application will be further described in detail below with reference to the accompanying drawings.

[0025] Referring to Figs. 1-2 , the embodiment provides a super-thin flat plate large frame casting process. The super-thin flat plate large frame casting process is cast by using a pouring system.

[0026] The pouring system comprises a plurality of feeding pipes 2 in communication with a pool 1 containing molten metal, a flow control assembly 3 arranged in the plurality of feeding pipes 2, a sprue 4 in one-to-one correspondence with the plurality of feeding pipes 2, a runner 5 in communication with the plurality of sprues 4, a runner pool 6 connected with the runner 5 and in one-to-one correspondence with the plurality of sprues 4, a plurality of ingates 7 arranged on the runner pool 6 and connected with each connection node of a mold, a graphene heating film arranged at each region of the top of the mold and a temperature monitoring assembly, a phase change heat storage unit arranged at each region of the bottom of the mold, and a controller electrically connected with the flow control assembly 3, the graphene heating film, the temperature monitoring assembly, and the phase change heat storage unit.

[0027] The super-thin flat plate large frame casting process comprises the following steps:

[0028] The plurality of feeding pipes 2 supply aluminum liquid to the plurality of runner pools 6 through the plurality of sprues 4, and the plurality of runner pools 6 divide the mold into regions to facilitate the overall regulation of the aluminum liquid in the entire mold.

[0029] The plurality of ingates 7 introduce the molten metal upward into the mold cavity through the connection nodes of the mold (not shown in the figure).

[0030] During the stage of injecting the molten metal into the cavity, the temperature monitoring assembly monitors the temperature signals of each region of the mold, and feeds back the signals to the controller, which controls the flow control assembly 3 and the graphene heating film corresponding to each region, adjusts the flow and flow rate of the corresponding feeding pipe 2 through the corresponding flow control assembly 3, and adjusts the temperature of the corresponding region through the corresponding graphene heating film. At this time, the phase change heat storage unit absorbs excess heat and stores it.

[0031] During the stage of solidification and shrinkage of the molten metal, the controller controls the phase change heat storage unit to release latent heat to compensate for the sudden drop in temperature.

[0032] In some embodiments, the temperature monitoring component comprises a temperature sensor and / or an infrared thermal imager. The flow control component 3 adopts a valve structure, the flow control component 3 comprises an electric push rod electrically connected with the controller and a valve plate connected with the electric push rod, the valve plate is slidingly arranged in the feeding pipe 2. The controller controls the electric push rod to drive the valve plate to slide to open the feeding pipe 2 to a certain extent, so as to regulate the flow and flow rate of the molten metal in the feeding pipe 2.

[0033] Since the whole bottom filling type is adopted, the gas in the molten aluminum can pass to the upper surface of the mold, so a plurality of exhaust risers are arranged on the mold to exhaust the gas, thereby ensuring the qualified rate of product forming. Meanwhile, a vacuum exhaust device can be arranged and connected with the exhaust riser, which is used for auxiliary exhaust and maintaining the negative pressure environment in the mold cavity.

[0034] In some embodiments, the straight sprues 4 are evenly distributed on the cross sprue 5, and the cross sprue pools 6 are connected with the cross sprue 5 through pipes so as to be communicated with the straight sprues 4 one by one. The cross sprue 5 plays a role of transition connection, and the straight sprues 4 on the cross sprue 5 are not communicated with each other. By arranging the feeding pipes 2 and the straight sprues 4 to be communicated with each other one by one, the feeding of each region of the mold can be facilitated. The straight sprues 4 are arranged outside the long side of the mold, so that the molten aluminum can flow smoothly and quickly.

[0035] In order to ensure that the molten metal in the pool 1 flows smoothly, the sidewall of the pool 1 is provided with a heat preservation layer, and the bottom of the pool 1 is provided with a heating unit. Meanwhile, a stirring device can be arranged on the side of the pool 1 to stir the molten metal in the pool 1. The pool 1 is provided with an inlet for pouring the molten metal.

[0036] The embodiments of the present application are described above in combination with the drawings, and the embodiments and the features in the embodiments in the present application can be combined with each other without conflict. The present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not limited, and those skilled in the art can make many forms under the guidance of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection scope of the present application.

Claims

1. A casting process for an ultra-thin flat plate large frame, employing a gating system for casting; characterized in that, The casting system includes several supply pipes (2), a flow control component (3) located in several supply pipes (2), a sprue (4) that is connected to several supply pipes (2) one by one, a sprue (5) that is connected to several sprues (4), a molten pool (6) that is connected to the sprue (5) and is connected to several sprues (4) one by one, several ingates (7) located on the molten pool (6) and connected to each connection node of the mold, a graphene heating film and a temperature monitoring component located in each area of ​​the top of the mold, a phase change heat storage unit located in each area of ​​the bottom of the mold, and a controller that is electrically connected to the flow control component (3), the graphene heating film, the temperature monitoring component, and the phase change heat storage unit. The ultra-thin flat plate large frame casting process includes the following steps: Molten metal is supplied to several horizontal molten pools (6) through several feed pipes (2) and several sprues (4), and the several horizontal molten pools (6) divide the mold into various areas; The molten metal is introduced upward into the mold cavity through several ingates (7) and the connecting nodes of the mold; During the metal liquid injection cavity stage, the temperature monitoring component monitors the temperature signal of each area of ​​the mold and feeds the signal back to the controller. The controller controls the flow control component (3) and graphene heating film corresponding to each area, and adjusts the flow rate and velocity of the corresponding feed pipe (2) through the corresponding flow control component (3). The temperature of the corresponding area is adjusted through the corresponding graphene heating film. At this time, the phase change heat storage unit absorbs and stores excess heat. During the solidification and shrinkage phase of the molten metal, the phase change thermal storage unit is controlled by the controller to release latent heat to compensate for the sudden drop in temperature.

2. The ultra-thin flat plate large frame casting process according to claim 1, characterized in that, The flow control component (3) includes an electric push rod electrically connected to the controller and a valve plate connected to the electric push rod, the valve plate being slidably disposed inside the feed pipe (2).

3. The ultra-thin flat plate large frame casting process according to claim 1, characterized in that, The temperature monitoring component includes a temperature sensor and / or an infrared thermal imager.

4. The ultra-thin flat plate large frame casting process according to claim 1, characterized in that, The mold is equipped with multiple venting risers.

5. The ultra-thin flat plate large frame casting process according to claim 1, characterized in that, Several sprues (4) are evenly distributed on the grate (5), and several grate pools (6) are connected to the grate (5) through pipes, thus corresponding to and communicating with several sprues (4) one by one.

6. The ultra-thin flat plate large frame casting process according to claim 1, characterized in that, Several feed pipes (2) are connected to a material pool (1) containing molten metal. The side wall of the material pool (1) is provided with a heat insulation layer, and the bottom of the material pool (1) is provided with a heating unit.

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