Structure for improving oil-sliding casting surface quality of aluminum alloy oil

Abstract

The utility model relates to the technical field of crystallization casting, in particular to a structure for improving aluminum alloy oil-gas sliding casting surface quality, which comprises a dummy bar head and a crystallizer, a graphite ring is embedded above the inner wall of the crystallizer, and the outer side of the graphite ring is connected with a plurality of graphite ring air inlet pipes. A honeycomb graphite plug is installed on the inner side of the outer wall of the lower portion of the adapter plate, and the inner wall of the pressing plate communicates with an ultra-micro pressure relief valve through an air adjusting hole. Through the cooperation between the ultra-micro pressure relief valve and the adapter plate, the volume of molten aluminum in crystals is controlled by air pressure, so that the molten aluminum does not contact with the adapter plate, the adapter plate is not damaged, the service life of the adapter plate is prolonged, and the problems that the adapter plate is damaged and the service life of the adapter plate is shortened due to the fact that the molten aluminum is likely to contact with the adapter plate are effectively solved; and the problem that in the overflowing process, the molten aluminum is prone to being oxidized, dross on the surface of the molten aluminum is disturbed, and the aluminum dross sinks easily and is mixed in a cast ingot to form casting defects is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of crystallization casting, in particular to a structure for improving the surface quality of oil-gas lubrication casting of aluminum alloys. Background Art

[0002] The crystallizer is a continuous steel casting equipment that receives molten steel injected from the intermediate tank and solidifies it into a solid shell with a specified cross-sectional shape. However, during use, the aluminum liquid inside the crystallizer is highly unstable and changes frequently, which makes it easy for the aluminum liquid to contact the transfer plate, causing damage to the transfer plate and reducing the life of the transfer plate.

[0003] At the same time, bubbles overflow from the aluminum melt in the crystallizer, and the excess compressed air in the oil-gas lubrication casting process will inevitably float up and overflow along the inner wall of the conduit. During the overflow process, the aluminum liquid is easily oxidized, which disturbs the slag on the surface of the aluminum liquid, easily causing the aluminum slag to sink and be mixed inside the ingot to form casting defects. Utility Model Content

[0004] The utility model aims to solve the problems that aluminum liquid is easy to contact with the transfer plate, which causes damage to the transfer plate, reduces the service life of the transfer plate, and the aluminum liquid is easy to be oxidized during the overflow process, which disturbs the slag on the surface of the aluminum liquid, easily causes the aluminum slag to sink and be mixed in the ingot to form casting defects. A structure for improving the surface quality of aluminum alloy oil and gas lubrication casting is proposed.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A structure for improving the surface quality of oil-gas sliding casting of aluminum alloy is designed, including an ingot guide head and a crystallizer, a graphite ring is embedded on the upper inner wall of the crystallizer, a plurality of graphite ring air inlet pipes are connected to the outer side of the graphite ring, a pressure plate is fixedly connected to the upper edge of the inner wall of the crystallizer, a transfer plate is installed on the upper part of the pressure plate, a honeycomb graphite plug is installed on the inner side of the lower outer wall of the transfer plate, corrugated graphite paper is installed on the outer side of the lower outer wall of the transfer plate, and the inner wall of the pressure plate is connected to an ultra-micro pressure relief valve through an air regulating hole.

[0007] Preferably, the ingot starter is installed on the inner wall of the lower opening of the crystallizer.

[0008] Preferably, a lead liquid inlet is processed at the center of the inner wall of the adapter plate.

[0009] Preferably, a plurality of sealing rings are installed on the upper portion of the inner and outer walls and the lower portion of the outer wall of the crystallizer.

[0010] The utility model proposes a structure for improving the surface quality of aluminum alloy oil-gas lubrication casting, which has the following beneficial effects:

[0011] Through the cooperation among the ultra-micro pressure relief valve, the crystallizer and the adapter plate, during use, the air pressure in the space above the inner wall of the crystallizer can be controlled by adjusting the ultra-micro pressure relief valve, and the air pressure is used to control the capacity of the aluminum liquid inside the crystallizer, thereby achieving a high degree of stability of the aluminum liquid inside the crystallizer, so that the aluminum liquid does not contact the adapter plate to avoid damaging the adapter plate and extend the life of the adapter plate, and the excess gas can be discharged, which effectively avoids the problem of easy contact between the aluminum liquid and the adapter plate, thereby causing damage to the adapter plate and reducing the life of the adapter plate. At the same time, it also avoids the problem that the aluminum liquid is easily oxidized during the overflow process, disturbs the slag on the surface of the aluminum liquid, and easily causes the aluminum slag to sink and be mixed inside the ingot to form a casting defect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 For this utility model Figure 1 Schematic diagram of the structure at position I in FIG.

[0014] In the figure: 1. ultra-low pressure relief valve, 2. ingot guide head, 3. crystallizer, 4. pressure plate, 5. adapter plate, 6. lead liquid inlet, 7. air adjustment hole, 8. corrugated graphite paper, 9. honeycomb graphite plug, 10. sealing ring, 11. graphite ring air inlet pipe, 12. graphite ring. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings:

[0016] Embodiment 1:

[0017] See attached Figure 1-2 : In the present embodiment, a structure for improving the surface quality of oil-gas sliding casting of aluminum alloy comprises a starter head 2 and a crystallizer 3, a graphite ring 12 is embedded on the upper inner wall of the crystallizer 3, a plurality of graphite ring air inlet pipes 11 are connected to the outer side of the graphite ring 12, the graphite ring air inlet pipes 11 can realize the stroke of the air film at the graphite ring 12, a pressing plate 4 is fixedly connected to the upper edge of the inner wall of the crystallizer 3, a transfer plate 5 is installed on the upper part of the pressing plate 4, a honeycomb graphite plug 9 is installed on the inner side of the lower outer wall of the transfer plate 5, the honeycomb graphite plug 9 is used to realize the passage of compressed air, a corrugated graphite paper 8 is installed on the outer side of the lower outer wall of the transfer plate 5, the inner wall of the pressing plate 4 is connected to the ultra-micro pressure relief valve 1 through the air regulating hole 7, the starter head 2 is installed on the inner wall of the lower opening of the crystallizer 3, a lead liquid inlet 6 is processed in the center of the inner wall of the transfer plate 5, the model of the crystallizer 3 can be determined according to the specific usage, and a plurality of sealing rings 10 are installed on the upper part of the inner and outer walls and the lower part of the outer wall of the crystallizer 3;

[0018] Through the cooperation among the ultra-micro pressure relief valve 1, the crystallizer 3 and the adapter plate 5, during use, the air pressure in the space above the inner wall of the crystallizer 3 can be controlled by adjusting the ultra-micro pressure relief valve 1, and the aluminum liquid capacity inside the crystallizer 3 can be controlled by using the air pressure, so as to achieve a high stability of the aluminum liquid inside the crystallizer 3, so that the aluminum liquid does not contact the adapter plate 5 so as not to damage the adapter plate and extend the life of the adapter plate, and the excess gas can be discharged, which effectively avoids the problem that the aluminum liquid is easy to contact with the adapter plate, thereby causing damage to the adapter plate and reducing the life of the adapter plate. At the same time, it also avoids the problem that the aluminum liquid is easily oxidized during the overflow process, disturbs the slag on the surface of the aluminum liquid, and easily causes the aluminum slag to sink and be mixed inside the ingot to form a casting defect.

[0019] Working principle:

[0020] When this structure for improving the surface quality of aluminum alloy oil-gas lubricated casting is needed, first, the aluminum liquid that has been processed to meet the quality requirements enters the oil-gas lubricated crystallizer 3 through the diversion system, and the aluminum liquid is cast according to the set process parameters. During the casting process, compressed air is introduced into the graphite ring 12 through the graphite ring air inlet pipe 11 to form a uniformly distributed air film, and the surface segregation layer of the finished product is thin and the surface is smooth. During use, the air pressure in the upper space of the inner wall of the crystallizer 3 can be controlled by controlling the ultra-micro pressure relief valve 1, and the aluminum liquid capacity inside the crystallizer 3 can be controlled by the air pressure, so as to achieve a high stability of the aluminum liquid inside the crystallizer 3, so that the aluminum liquid does not contact the adapter plate 5 so as not to damage the adapter plate and extend the service life of the adapter plate, and the excess gas can be discharged, effectively avoiding the problem that the aluminum liquid is easy to contact with the adapter plate, thereby causing damage to the adapter plate and reducing the service life of the adapter plate. At the same time, it also avoids the problem that the aluminum liquid is easily oxidized during the overflow process, disturbs the scum on the surface of the aluminum liquid, and easily causes the aluminum slag to sink and be mixed in the ingot to form a casting defect.

[0021] The following issues are mainly solved:

[0022] 1: The aluminum liquid inside the crystallizer is highly unstable and changes frequently, which makes it easy for the aluminum liquid to contact the adapter plate, causing damage to the adapter plate and reducing the life of the adapter plate.

[0023] 2: Bubbles overflow from the aluminum melt in the crystallizer. During the oil-gas casting process, the excess compressed air will inevitably float up and overflow along the inner wall of the conduit. During the overflow process, the aluminum liquid is easily oxidized, which disturbs the slag on the surface of the aluminum liquid, easily causing the aluminum slag to sink and be mixed inside the ingot to form a casting defect.

[0024] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A structure for improving the surface quality of aluminum alloy oil-gas lubrication casting, comprising a starter head (2) and a crystallizer (3), characterized in that: A graphite ring (12) is embedded on the upper part of the inner wall of the crystallizer (3), and a plurality of graphite ring air inlet pipes (11) are connected to the outer side of the graphite ring (12). A pressure plate (4) is fixedly connected to the upper edge of the inner wall of the crystallizer (3), and a transfer plate (5) is installed on the upper part of the pressure plate (4). A honeycomb graphite plug (9) is installed on the inner side of the lower outer wall of the transfer plate (5), and a corrugated graphite paper (8) is installed on the outer side of the lower outer wall of the transfer plate (5). The inner wall of the pressure plate (4) is connected to the ultra-micro pressure relief valve (1) through an air regulating hole (7).

2. The structure for improving the surface quality of aluminum alloy oil-gas lubrication casting according to claim 1 is characterized in that: The ingot starter (2) is installed on the inner wall of the lower opening of the crystallizer (3).

3. The structure for improving the surface quality of aluminum alloy oil-gas lubrication casting according to claim 1 is characterized in that: A lead liquid inlet (6) is processed at the center of the inner wall of the adapter plate (5).

4. The structure for improving the surface quality of aluminum alloy oil-gas lubrication casting according to claim 1 is characterized in that: A plurality of sealing rings (10) are installed on the upper portions of the inner and outer walls and the lower portion of the outer wall of the crystallizer (3).

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