Auxiliary chilling device for molded surface of nodular cast iron female die casting

Abstract

The utility model relates to an auxiliary chilling device for a molded surface of a nodular cast iron female die casting, which comprises a female die casting main body and a chilling structure, the chilling structure comprises an annular air cooling pipe, an air inlet connecting pipe and an air outlet connecting pipe which are arranged at the bottom of the annular air cooling pipe, and a shape follow-up air cooling calandria arranged on the inner side of the annular air cooling pipe, the annular air-cooling pipe and the conformal air-cooling calandria are thin-wall seamless steel pipes, an air supply pipe of an air compressor is connected with an air inlet connecting pipe, the air compressor is started, the air inlet temperature of compressed air is about 28 DEG C, the compressed air flows through the chilling structure, absorbs heat of a sand mold and then becomes overheated air, and the air is exhausted from an air outlet connecting pipe after the temperature of the air rises to about 60 DEG C; in the process, heat is taken away continuously, the temperature field of a sand mold area above the casting molded surface is reduced, and efficient and uniform chilling of the casting molded surface is achieved.

Description

Technical Field

[0001] This utility model relates to the field of ductile iron casting technology, and in particular to an auxiliary cooling device for the surface of ductile iron concave mold castings. Background Technology

[0002] Ductile iron is a type of cast iron material with high strength and high plasticity, produced by adding a spheroidizing agent (usually magnesium or cerium) to molten gray cast iron, which transforms the graphite in the cast iron from flakes to spheres.

[0003] During the production of ductile iron die castings, the mold surface area is prone to defects such as shrinkage porosity due to the concentration of heat. Due to the high pouring temperature, the casting solidifies and cools slowly, resulting in a long sand box occupation period and low production efficiency. At present, although chills can be used for rapid cooling, for large die castings, the cooling speed of chills alone is limited, the effect is uneven, and the practicality is low. Utility Model Content

[0004] In response to the technical problems of slow cooling rate, easy shrinkage defects and long unpacking cycle of ductile iron die castings in existing patents, this utility model provides an auxiliary quenching device for ductile iron die castings.

[0005] The technical solution adopted in this utility model is: an auxiliary cooling device for the surface of a ductile iron die casting, comprising:

[0006] The main body of the die casting;

[0007] A chilling structure is installed on the top of the die casting body, and the chilling structure is used to improve the cooling rate of the die casting surface.

[0008] The cooling structure includes an annular air-cooling pipe, an air inlet connection pipe and an air outlet connection pipe installed at the bottom of the annular air-cooling pipe, and a conformal air-cooling pipe installed inside the annular air-cooling pipe.

[0009] Furthermore, both the annular air-cooling pipe and the conformal air-cooling manifold are thin-walled seamless steel pipes, with a diameter of 60mm and a wall thickness of 2mm.

[0010] Furthermore, the diameter of the air inlet connecting pipe and the air outlet connecting pipe is 50mm, and the wall thickness is 2mm.

[0011] Furthermore, a position adjustment component is installed on one side of the annular air-cooling pipe. The position adjustment component is used to adjust the position of the annular air-cooling pipe according to usage requirements. The position adjustment component includes a lifting and moving guide rail installed on one side of the annular air-cooling pipe, a positioning seat installed on one side of the slider of the lifting and moving guide rail, a disassembly and assembly structure installed inside the positioning seat, and an assembly seat installed on one side of the annular air-cooling pipe.

[0012] Furthermore, a positioning groove is provided on one side of the positioning seat, and a reset groove is provided on one side of the positioning groove. The disassembly and assembly structure includes a reset plate fused to the inner wall of the reset groove by a reset spring, a limiting post and a disassembly and assembly post fixedly welded to one side of the reset plate, and a positioning block fixedly welded to one side of the assembly seat.

[0013] Furthermore, the positioning block cooperates with the positioning groove, and a limiting hole is formed on the positioning block, which cooperates with the limiting post.

[0014] The beneficial effects of this utility model are:

[0015] 1. By connecting the air compressor's air supply pipe to the air inlet pipe, the air compressor is turned on. The compressed air inlet temperature is about 28°C. After flowing through the interior of the cooling structure, it absorbs the heat from the sand mold and becomes superheated gas. The gas temperature rises to about 60°C and is discharged from the air outlet pipe. This process continuously removes heat, reduces the temperature field in the sand mold area above the casting surface, and achieves efficient and uniform cooling of the casting surface.

[0016] 2. The reset plate is moved by the disassembly column, the reset plate compresses the reset spring, and the reset plate moves the limit column, thereby controlling the relative position of the limit column and the limit hole, and in turn controlling the relative position of the positioning block and the positioning groove. This facilitates the disassembly and assembly of the positioning seat and the assembly seat, and makes it easy to assemble the required cooling structure according to the usage requirements. The height of the cooling structure can be easily adjusted by the lifting and moving guide rail, making it easy to adjust and use, and it has good practicality. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of another technical solution in this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the cooling structure and position adjustment component in this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the disassembly and assembly structure in this utility model.

[0021] The diagram is marked as follows:

[0022] 1. Main body of the die casting;

[0023] 2. Cooling structure; 201. Annular air-cooled pipe; 202. Air inlet connecting pipe; 203. Air outlet connecting pipe; 204. Conformal air-cooled coil;

[0024] 3. Position adjustment assembly; 301. Lifting guide rail; 302. Positioning seat; 303. Disassembly and assembly structure; 3031. Return spring; 3032. Return plate; 3033. Limiting post; 3034. Disassembly and assembly post; 3035. Positioning block; 304. Assembly seat;

[0025] 4. Limiting hole. Detailed Implementation

[0026] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings:

[0029] Example 1

[0030] This embodiment provides a technical solution: an auxiliary cooling device for the surface of a ductile iron die casting, comprising: a die casting body 1 and a cooling structure 2.

[0031] like Figure 1 As shown, the cooling structure 2 is installed on the top of the die casting body 1. The cooling structure 2 is used to improve the cooling rate of the die casting surface.

[0032] The cooling structure 2 includes an annular air-cooling pipe 201, an air inlet connecting pipe 202 and an air outlet connecting pipe 203 installed at the bottom of the annular air-cooling pipe 201, and a conformal air-cooling pipe 204 installed inside the annular air-cooling pipe 201.

[0033] Furthermore, both the annular air-cooled pipe 201 and the conformal air-cooled pipe 204 are thin-walled seamless steel pipes, with a diameter of 60mm and a wall thickness of 2mm.

[0034] Furthermore, the diameter of the air inlet connecting pipe 202 and the air outlet connecting pipe 203 is 50mm and the wall thickness is 2mm.

[0035] Furthermore, the shape of the conformal air-cooled pipe 204 is adapted to the profile of the die casting body 1, and its installation position is 100mm above the profile.

[0036] Working principle: During use, the main body 1 of the concave mold casting and the chilling structure 2 are placed together in the sand box, and conformal chills are placed on the surface of the main body 1 of the concave mold casting. The sand mixer is turned on to make the sand mold. After the casting is completed, the air supply pipe of the air compressor is connected to the air inlet connection pipe 202. The air compressor is turned on, and the compressed air intake temperature is about 28°C. It flows through the interior of the chilling structure 2, absorbs the heat of the sand mold and becomes superheated gas. The gas temperature rises to about 60°C and is discharged from the air outlet connection pipe 203. This process continuously removes heat and reduces the temperature field of the sand mold area above the casting surface, achieving efficient and uniform chilling of the casting surface.

[0037] Example 2

[0038] This embodiment is a further optimization based on Embodiment 1. The parts that are the same as those described above will not be repeated here. Figure 2 , Figure 3 , Figure 4 As shown, to further improve the realization of this utility model, a position adjustment component 3 is provided to adjust the position of the annular air-cooling pipe 201 according to the usage requirements.

[0039] The position adjustment assembly 3 includes a lifting and moving guide rail 301 installed on one side of the annular air-cooling pipe 201, a positioning seat 302 installed on the slider side of the lifting and moving guide rail 301, a disassembly and assembly structure 303 installed inside the positioning seat 302, and an assembly seat 304 installed on one side of the annular air-cooling pipe 201.

[0040] Furthermore, a positioning groove is provided on one side of the positioning seat 302, and a reset groove is provided on one side of the positioning groove. The disassembly and assembly structure 303 includes a reset plate 3032 fused to the inner wall of the reset groove by a reset spring 3031, a limiting post 3033 and a disassembly and assembly post 3034 fixedly welded to one side of the reset plate 3032, and a positioning block 3035 fixedly welded to one side of the assembly seat 304.

[0041] Furthermore, the positioning block 3035 cooperates with the positioning groove, and a limiting hole 4 is provided on the positioning block 3035, which cooperates with the limiting post 3033.

[0042] Furthermore, when using this technical solution, both the bottom ends of the air inlet connecting pipe 202 and the air outlet connecting pipe 203 are connected to elastic telescopic pipes to facilitate the raising and lowering of the annular air-cooling pipe 201.

[0043] Working principle: The disassembly column 3034 drives the reset plate 3032 to move. The reset plate 3032 compresses the reset spring 3031, and the reset plate 3032 drives the limit column 3033 to move. The relative position of the limit column 3033 and the limit hole 4 is controlled, thereby controlling the relative position of the positioning block 3035 and the positioning groove. This facilitates the disassembly and assembly between the positioning seat 302 and the assembly seat 304, and facilitates the assembly of the required cooling structure 2 according to the usage requirements.

[0044] The main body 1 of the concave mold casting, the position adjustment component 3 and the chilling structure 2 are placed together in the sand box. The height of the chilling structure 2 can be easily adjusted by the lifting and moving guide rail 301, which is convenient for adjustment and use and has good practicality.

[0045] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0046] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A device for auxiliary quenching of ductile iron die casting surfaces, characterized in that, include: The main body of the die casting (1); A cooling structure (2) is installed on the top of the die casting body (1) and is used to improve the cooling rate of the die casting surface. The cooling structure (2) includes an annular air-cooled pipe (201), an air inlet connecting pipe (202) and an air outlet connecting pipe (203) installed at the bottom of the annular air-cooled pipe (201), and a conformal air-cooled pipe (204) installed inside the annular air-cooled pipe (201).

2. The auxiliary quenching device for the surface of a ductile iron die casting as described in claim 1, characterized in that, The annular air-cooled pipe (201) and the conformal air-cooled pipe (204) are both thin-walled seamless steel pipes. The diameter of the annular air-cooled pipe (201) and the conformal air-cooled pipe (204) is 60mm and the wall thickness is 2mm.

3. The auxiliary quenching device for the surface of a ductile iron die casting according to claim 2, characterized in that, The diameter of the air inlet connecting pipe (202) and the air outlet connecting pipe (203) is 50 mm and the wall thickness is 2 mm.

4. The auxiliary quenching device for the surface of a ductile iron die casting as described in claim 1, characterized in that, A position adjustment component (3) is installed on one side of the annular air-cooling pipe (201). The position adjustment component (3) is used to adjust the position of the annular air-cooling pipe (201) according to the usage requirements. The position adjustment component (3) includes a lifting and moving guide rail (301) installed on one side of the annular air-cooling pipe (201), a positioning seat (302) installed on one side of the slider of the lifting and moving guide rail (301), a disassembly and assembly structure (303) installed inside the positioning seat (302), and an assembly seat (304) installed on one side of the annular air-cooling pipe (201).

5. The auxiliary quenching device for the surface of a ductile iron die casting according to claim 4, characterized in that, The positioning seat (302) has a positioning groove on one side and a reset groove on one side. The disassembly and assembly structure (303) includes a reset plate (3032) fused to the inner wall of the reset groove by a reset spring (3031), a limiting post (3033) and a disassembly and assembly post (3034) fixedly welded to one side of the reset plate (3032), and a positioning block (3035) fixedly welded to one side of the assembly seat (304).

6. The auxiliary quenching device for the surface of a ductile iron die casting according to claim 5, characterized in that, The positioning block (3035) cooperates with the positioning groove, and a limiting hole (4) is provided on the positioning block (3035), which cooperates with the limiting post (3033).

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