Metal flange casting equipment and casting method for eliminating surface pores

Abstract

The invention discloses a metal flange casting device and a casting method for eliminating surface pores, and relates to the technical field of flange casting. A power device is used as a main power source to drive a molding device to move and automatically demould. A material taking manipulator is arranged on one side of a frame. When an upper mold and a molding flange are separated, auxiliary demoulding is performed by the material taking manipulator. Before and after the injection of molten metal, temperature adjustment is performed respectively. Before the injection, local temperature is increased by a temperature regulating device. After the injection is completed, the temperature regulating device is used to cool and mold. After the molding is completed, automatic demoulding is performed. The upper mold is respectively installed with an injection tube and an air guide tube through a drainage groove. The air guide tube is connected to a negative pressure gas source to compensate for gas pressure fluctuations in a flange cavity, so as to prevent the injected metal liquid from splashing and entraining air, thereby causing surface pores.

Description

Technical Field

[0001] The invention relates to the technical field of flange casting, in particular to a metal flange casting device and a casting method for eliminating surface pores. Background Art

[0002] Flanges are generally called flanges or flanges. Most of them include a body and a sealing layer. They are used to connect pipe parts or shaft parts. Common processing techniques include forging, casting, cutting or rolling. Influenced by flange specifications, casting is often used in the process of forming large-size flanges.

[0003] When casting metal flanges, the mold is usually closed first, and then the molten metal is injected into the cavity, and then cooled to form the flange. However, since the molten metal will generate heat loss during the transportation process, and after entering the cavity, the low temperature of the mold itself can easily reduce the fluidity of the molten metal. Under the action of surface tension, it is not easy to fill the cavity corner (convex right angle), affecting the molding quality of the flange.

[0004] In addition, the method of first vacuuming and then injecting the molten metal can easily cause the molten metal to splash, allowing more air to enter the molten metal, resulting in pores on the surface of the metal flange formed by cooling, affecting the structural strength. Summary of the invention

[0005] The purpose of the present invention is to provide a metal flange casting device and a casting method for eliminating surface pores, so as to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The casting equipment is used to cast workpieces. The casting equipment includes a supporting device, a molding device, a power device, a temperature regulating device, an injection tube and an air guide tube. The molding device is connected to the supporting device, the power device and the supporting device are tightly connected, the temperature regulating device and the molding device are connected by pipelines, the injection tube and the molding device are connected, the molding device includes an upper mold, the upper mold and the supporting device are tightly connected, a plurality of drainage grooves are provided on the upper mold, and the injection tube and the air guide tube are respectively inserted into the drainage grooves.

[0008] The metal flange is cast by casting equipment. The supporting device is used as the main foundation to install and fix other devices. The molding device is designed according to the specifications of the flange to form a flange cavity for easy injection molding. The power device is used as the main power source to drive the molding device to move and automatically demould. A material-retrieving robot is set on one side of the frame. When the upper mold and the molding flange are separated, the material-retrieving robot is used to assist demoulding. Before and after the injection of molten metal, the temperature is adjusted respectively. Before injection, the temperature is locally increased by the temperature regulating device; after the injection is completed, the temperature is cooled and molded by the temperature regulating device. After the molding is completed, automatic demoulding is performed. The upper mold installs the injection tube and the air guide tube respectively through the drainage groove. The air guide tube is connected to the negative pressure gas source to compensate for the gas pressure fluctuation in the flange cavity to prevent the injected metal liquid from splashing and entraining air, resulting in surface pores.

[0009] Furthermore, the supporting device includes a frame, a mounting seat and a base, the base and the frame are fastened together, the molding device also includes a lower die and a ring die, the lower die and the base are fastened together, the power device includes a pressure cylinder, two pressure cylinders are provided, the two pressure cylinders are fastened together with the frame, the pressure cylinder output end is fastened together with the mounting seat, and the upper die and the mounting seat are fastened together;

[0010] A lower cavity is arranged on the lower die, and the ring die is arranged in the lower cavity. The ring die and the lower cavity are movably connected.

[0011] The frame is used to install the base. By setting two bases, double-station casting is convenient and the casting efficiency is improved. The lower mold is installed through the base. The pressure cylinder is used to output linear displacement. It can be in the form of an oil cylinder to drive the mounting seat to move linearly, thereby driving the upper mold to move for mold closing and opening. The upper mold is a punch and the lower mold is a concave mold. Through the split structure of the upper mold, the lower mold and the ring mold, the demoulding is carried out in sequence during demoulding to improve the continuous molding quality. At the same time, the single demoulding force is reduced to avoid local force deformation. The lower cavity is used to install the ring mold.

[0012] Furthermore, the temperature control device includes a hot air pipe, a cooling cavity is provided on the outside of the lower mold cavity, a guide arc surface is provided at the inner corner of the cooling cavity, a circulation groove is provided at the outer corner of the cooling cavity, the circulation groove is arranged in an arc shape in vertical cross-section, and the circulation groove is opened toward the guide arc surface. The hot air pipe and the circulation groove pipeline are connected, and the outlet direction of the circulation groove is inclined downward along the tangent direction of the guide arc surface.

[0013] A high-pressure hot air source is introduced through the hot air pipe and sent into the circulation groove, flowing along the circulation groove. The tail end of the circulation groove is tilted downward and directed in the inclined direction of the guide arc surface. Since the guide arc surface is a convex arc, when the high-temperature airflow flows through, the friction between the high-temperature gas and the guide arc surface will drive the high-temperature airflow to flow along the guide arc surface, thereby locally heating the convex right angle of the lower cavity through the guide arc surface. After the mold is completed, when the molten metal is injected through the injection tube, the molten metal is locally heated near the convex right angle of the flange by the high-temperature airflow. After the molten metal enters the lower cavity, the closer it is to the convex right angle, the higher the temperature, the better the fluidity, the smaller the surface tension, and it is easier to fill the convex right angle, thereby improving the forming quality.

[0014] Furthermore, the hot air pipe is arranged vertically along the outer side of the circulation groove in a spraying direction.

[0015] The circulation groove is not a complete circle. It is opened toward one side of the guide arc surface. The hot air pipe is located on the outside and is arranged vertically. After the hot air flow hits the circulation groove, it flows along the curved wall under the action of the circulation groove wall, and finally flows to the guide arc surface for local heating. After flowing through the guide arc surface, it flows downward at an angle. Since the hot air flow itself has a high temperature, it will flow upward under the action of buoyancy, thereby performing local air flow microcirculation and improving heating efficiency.

[0016] Furthermore, the power device also includes a plurality of ejector cylinders, the ejector cylinder bodies are tightly connected to the frame, a plurality of transmission grooves are provided on the base, the output ends of the ejector cylinders pass through the transmission grooves, a plurality of positioning grooves are provided on the lower mold, the output ends of the ejector cylinders are inserted into the positioning grooves, and the output ends of the ejector cylinders abut against the bottom end of the ring mold.

[0017] Several ejector cylinders are fixed on the frame respectively, and the output ends pass through the transmission groove and are inserted into the positioning groove of the lower mold, so as to automatically position the lower mold. During demoulding, since the contact area between the forming flange and the inner wall of the ring mold and the wall of the lower cavity is larger than the contact area between the upper mold and the forming flange, that is, the outer friction force of the forming flange is larger than the inner friction force, the upper mold is driven upward by the pressure cylinder, and the upper mold and the forming flange are separated, and then the ring mold is driven upward by the ejector cylinder, and the horizontal surface of the lower cavity is coated with a demoulding agent to improve the demoulding efficiency. The metal flange includes an upper disk body and a lower sealing layer, and the thickness of the disk body is greater than the thickness of the sealing layer. The forming flange is driven upward by the ring mold to demould the forming flange and the lower mold. When the ring mold moves to a certain height, a protrusion is set on the inner wall of the lower cavity to limit the ring mold. The material-retrieving manipulator is inserted into the middle of the forming flange to drive the forming flange to continue to move upward for automatic material-retrieving, so that the forming flange and the ring mold are separated. Through layered demoulding, the single demoulding force is reduced, thereby preventing damage caused by excessive local force and ensuring the demoulding quality.

[0018] Furthermore, the power device also includes a plurality of connecting pipes and liquid outlet pipes, which are respectively located at the upper end of the ejection cylinder output end, a central flow channel is provided on the ring die, the central flow channel inlet is connected to the connecting pipe, the central flow channel outlet is connected to the liquid outlet pipe, a coolant pipe is provided on one side of the cooling chamber, the coolant pipe is connected to the cooling chamber, and the lower end of the connecting pipe is connected to the cooling chamber.

[0019] During cooling, cooling medium is supplied into the cooling cavity through the cooling liquid pipe, and the cooling medium in the cooling cavity enters the central flow channel through the connecting pipe, thereby cooling the disk part of the flange and improving the cooling quality. By setting a liquid outlet pipe, the cooling medium heated after cooling is discharged from the central flow channel, thereby performing continuous cooling and improving the cooling quality.

[0020] As an optimization, the height of the ring die is not less than the thickness of the finished flange. By setting the height difference, the contact area between the ring die and the flange is set to be larger than the contact area between the sealing layer and the lower cavity, which facilitates the separation of the formed flange and the lower die.

[0021] As an optimization, the number of connecting pipes is half of the number of ejection cylinders. The sum of the number of connecting pipes and the number of liquid outlet pipes is equal to the number of ejection cylinders, which is convenient for continuous cooling.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: through the split structure of the upper mold, the lower mold and the ring mold, demolding is carried out in sequence during demolding, thereby improving the continuous molding quality, and at the same time, the single demolding force is reduced to avoid local stress deformation; since the guide arc surface is a convex arc, when the high-temperature airflow flows through, due to the friction between the high-temperature gas and the guide arc surface, it will drive the high-temperature airflow to flow along the guide arc surface, and the convex right angle of the lower cavity is locally heated through the guide arc surface; after the molten metal enters the lower cavity, the closer it is to the convex right angle, the higher the temperature, the better the fluidity, the smaller the surface tension, and it is easier to fill the convex right angle, thereby improving the forming quality; after the hot airflow impacts the circulation groove, it flows along the arc wall under the action of the circulation groove wall, and finally flows to the guide arc surface for Local heating, after flowing through the guide arc surface, it flows downward obliquely. Since the hot air flow itself has a high temperature, it will flow upward due to the buoyancy, thereby performing local air flow microcirculation and improving heating efficiency; during demoulding, since the contact area between the forming flange and the inner wall of the ring die and the wall of the lower cavity is larger than the contact area between the upper die and the forming flange, that is, the outer friction force of the forming flange is larger than the inner friction force, the upper die and the forming flange are separated. The metal flange includes an upper disk body and a lower sealing layer, and the thickness of the disk body is greater than the thickness of the sealing layer. The forming flange is driven upward by the ring die to demould the forming flange and the lower die. The material taking robot is inserted into the middle of the forming flange, so that the forming flange and the ring die are separated. Through layered demoulding, the single demoulding force is reduced, thereby preventing damage caused by excessive local force and ensuring the demoulding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the injection tube positioning of the present invention;

[0025] Figure 3 This is a schematic diagram of the liquid inlet and outlet of the central flow channel of the present invention;

[0026] Figure 4 It is a schematic diagram of the split structure of the molding device of the present invention;

[0027] Figure 5 It is a schematic diagram of cooling medium diversion of the present invention;

[0028] Figure 6 for Figure 5 A magnified view of a detail of the view.

[0029] In the figure: 1. supporting device; 11. frame; 12. mounting seat; 13. base; 2. molding device; 21. upper mold; 211. drainage groove; 22. lower mold; 221. lower cavity; 222. cooling cavity; 223. positioning groove; 224. guide arc surface; 225. circulation groove; 23. ring mold; 231. center flow channel; 3. power device; 31. pressure cylinder; 32. ejection cylinder; 4. temperature control device; 41. cooling liquid pipe; 42. hot air pipe; 43. connecting pipe; 44. liquid outlet pipe; 5. injection pipe; 6. air guide pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example: Figure 1 to Figure 6 As shown, the present invention provides a technical solution for metal flange casting equipment and a casting method for eliminating surface pores.

[0032] The casting equipment is used to cast a workpiece, and the casting equipment includes a supporting device 1, a molding device 2, a power device 3, a temperature regulating device 4, an injection tube 5 and an air guide tube 6. The molding device 2 is connected to the supporting device 1, the power device 3 is firmly connected to the supporting device 1, the temperature regulating device 4 is connected to the molding device 2 by a pipeline, the injection tube 5 is connected to the molding device 2, and the molding device 2 includes an upper mold 21, the upper mold 21 is firmly connected to the supporting device 1, and a plurality of drainage grooves 211 are provided on the upper mold 21, and the injection tube 5 and the air guide tube 6 are respectively inserted into the drainage grooves 211.

[0033] The metal flange is cast by casting equipment. The supporting device 1 is used as the main foundation for installing and fixing other devices. The molding device 2 is designed according to the specifications of the flange to form a flange cavity for easy injection molding. The power device 3 is used as the main power source to drive the molding device 2 to move and automatically demould. A material-taking robot is set on one side of the frame 11. When the upper mold 21 and the molding flange are separated, the material-taking robot is used to assist demoulding. Before and after the injection of molten metal, the temperature is adjusted respectively. Before injection, the temperature is locally increased by the temperature control device 4; after the injection is completed, the temperature is cooled and molded by the temperature control device 4. After the molding is completed, it is automatically demoulded. The upper mold 21 installs the injection tube 5 and the air guide tube 6 respectively through the drainage groove 211. The air guide tube 6 is connected to the negative pressure gas source to compensate for the gas pressure fluctuation in the flange cavity and prevent the injected metal liquid from splashing and entraining air to cause surface pores.

[0034] Further, the supporting device 1 includes a frame 11, a mounting seat 12 and a base 13, the base 13 and the frame 11 are fastened together, the forming device 2 also includes a lower die 22 and a ring die 23, the lower die 22 and the base 13 are fastened together, the power device 3 includes a pressure cylinder 31, two pressure cylinders 31 are provided, the two pressure cylinders 31 are fastened together with the frame 11 respectively, the output end of the pressure cylinder 31 is fastened together with the mounting seat 12, and the upper die 21 is fastened together with the mounting seat 12;

[0035] The lower die 22 is provided with a lower die cavity 221 , and the ring die 23 is disposed in the lower die cavity 221 . The ring die 23 and the lower die cavity 221 are movably connected.

[0036] The frame 11 is used to install the base 13. By setting two bases 13, double-station casting is convenient to improve casting efficiency. The lower mold 22 is installed through the base 13. The pressure cylinder 31 is used to output linear displacement. It can be in the form of an oil cylinder to drive the mounting base 12 to move linearly, thereby driving the upper mold 21 to move for mold closing and mold opening. The upper mold 21 is a punch and the lower mold 22 is a concave mold. Through the split structure of the upper mold 21, the lower mold 22 and the ring mold 23, demolding is performed in sequence during demolding to improve the continuous molding quality. At the same time, the single demolding force is reduced to avoid local force deformation. The lower cavity 221 is used to install the ring mold 23.

[0037] Furthermore, the temperature control device 4 includes a hot air pipe 42, a cooling cavity 222 is provided on the outside of the lower mold cavity 221, a guide arc surface 224 is provided at the inner corner of the cooling cavity 222, and a circulation groove 225 is provided at the outer corner of the cooling cavity 222. The circulation groove 225 is arranged in an arc shape in vertical cross-section, and the circulation groove 225 is opened toward one side of the guide arc surface 224. The hot air pipe 42 and the circulation groove 225 are connected by pipeline, and the exit direction of the circulation groove 225 is inclined downward along the tangent direction of the guide arc surface 224.

[0038] A high-pressure hot air source is introduced through the hot air pipe 42 and sent into the circulation groove 225, flowing along the circulation groove 225. The tail end of the circulation groove 225 is inclined downward and directed in the inclined direction of the guide arc surface 224. Since the guide arc surface 224 is a convex arc, when the high-temperature airflow flows through, due to the friction between the high-temperature gas and the guide arc surface 224, the high-temperature airflow will be driven to flow along the guide arc surface 224, and the outer convex right angle of the lower cavity 221 is locally heated through the guide arc surface 224. After the mold is closed, when the molten metal is injected through the injection tube 5, due to the local heating by the high-temperature airflow near the outer convex right angle of the flange, after the molten metal enters the lower cavity 221, the closer it is to the outer convex right angle, the higher the temperature, the better the fluidity, the smaller the surface tension, and it is easier to fill the outer convex right angle, thereby improving the forming quality.

[0039] Furthermore, the hot air pipe 42 is vertically arranged along the outer side of the circulation groove 225 in a spraying direction.

[0040] The circulation groove 225 is not a complete circle, and is opened toward one side of the guide arc surface 224. The hot air pipe 42 is located on the outside and is arranged vertically. After the hot air flow hits the circulation groove 225, it flows along the curved wall under the action of the wall of the circulation groove 225, and finally flows to the guide arc surface 224 for local heating. After flowing through the guide arc surface 224, it flows downward at an angle. Since the hot air flow itself has a high temperature, it will flow upward under the action of buoyancy, thereby performing local air flow microcirculation and improving the heating efficiency.

[0041] Furthermore, the power device 3 also includes a plurality of ejection cylinders 32, the cylinder bodies of the ejection cylinders 32 are fastened to the frame 11, a plurality of transmission grooves are provided on the base 13, the output ends of the ejection cylinders 32 pass through the transmission grooves, a plurality of positioning grooves 223 are provided on the lower mold 22, the output ends of the ejection cylinders 32 are inserted into the positioning grooves 223, and the output ends of the ejection cylinders 32 abut against the bottom end of the ring mold 23.

[0042] A plurality of ejection cylinders 32 are respectively fixed on the frame 11 , and the output ends pass through the transmission groove and are inserted into the positioning groove 223 of the lower mold 22 , so as to automatically position the lower mold 22 . During demoulding, since the contact area between the forming flange and the inner wall of the ring die 23 and the wall of the lower cavity 221 is larger than the contact area between the upper die 21 and the forming flange, that is, the outer friction force on the forming flange is larger than the inner friction force, the upper die 21 is driven upward by the pressure cylinder 31, and the upper die 21 and the forming flange are separated, and then the ring die 23 is driven upward by the ejection cylinder 32, and a demoulding agent is applied to the horizontal surface of the lower cavity 221 to improve the demoulding efficiency. The metal flange includes an upper disk body and a lower sealing layer, and the thickness of the disk body is greater than the thickness of the sealing layer. The forming flange is driven upward by the ring die 23 to demould the forming flange and the lower die 22. When the ring die 23 moves to a certain height, a protrusion is set on the inner wall of the lower cavity 221 to limit the ring die 23. The material taking manipulator is inserted into the middle of the forming flange to drive the forming flange to continue to move upward for automatic material taking, so that the forming flange and the ring die 23 are separated. Through layered demoulding, the single demoulding force is reduced, thereby preventing damage caused by excessive local force and ensuring the demoulding quality.

[0043] Furthermore, the power device 3 also includes a plurality of connecting pipes 43 and liquid outlet pipes 44, which are respectively located at the upper end of the output end of the ejection cylinder 32, a central flow channel 231 is provided on the ring mold 23, the inlet of the central flow channel 231 is connected to the connecting pipe 43, the outlet of the central flow channel 231 is connected to the liquid outlet pipe 44, a coolant pipe 41 is provided on one side of the cooling chamber 222, the coolant pipe 41 is connected to the cooling chamber 222, and the lower end of the connecting pipe 43 is connected to the cooling chamber 222.

[0044] During cooling, cooling medium is supplied into the cooling cavity 222 through the cooling liquid pipe 41, and the cooling medium in the cooling cavity 222 enters the central flow channel 231 through the connecting pipe 43, thereby cooling the disk part of the flange and improving the cooling quality. By setting the liquid outlet pipe 44, the cooling medium heated after cooling is discharged from the central flow channel 231, thereby performing continuous cooling and improving the cooling quality.

[0045] As an optimization, the height of the ring die 23 is not less than the thickness of the finished flange. By setting the height difference, the contact area between the ring die 23 and the flange is set to be larger than the contact area between the sealing layer and the lower cavity 221, which facilitates the separation of the formed flange and the lower die 22.

[0046] As an optimization, the number of the connecting pipes 43 is half of the number of the ejection cylinders 32. The sum of the number of the connecting pipes 43 and the number of the liquid outlet pipes 44 is equal to the number of the ejection cylinders 32, which is convenient for continuous cooling.

[0047] A casting method for a metal flange casting device for eliminating surface pores, the forging method comprising the following steps:

[0048] S1, the pressure cylinder 31 drives the upper mold 21 to move downward through the mounting seat 12, thereby automatically closing the mold;

[0049] S2. After the mold is closed, hot air is injected into the circulation groove 225 through the hot air pipe 42, so as to locally heat the outer convex right-angle part of the flange;

[0050] S3, after the heating is completed, the molten metal is injected into the lower cavity 221 through the injection tube 5. Since the temperature of the lower cavity 221 near the right angle of the flange is the highest, it is convenient to fill the corners and improve the molding quality. At the same time, the exhaust is carried out through the air guide pipe 6. When the molten metal is splashed, it is mixed with air, which affects the molding quality.

[0051] S4. After the injection is completed, the cooling medium is injected into the cooling cavity 222 through the cooling liquid pipe 41 to cool the flange, and part of the cooling medium is introduced into the middle flow channel 231 through the connecting pipe 43, so as to facilitate cooling the flange body and improve the cooling uniformity. A lead-out pipe is provided on one side of the cooling cavity to facilitate the lead-out of the heated cooling liquid;

[0052] S5. The upper die 21 is driven upward by the pressure cylinder 31 to be separated from the forming flange first; the ring die 23 and the forming flange are then driven upward by the ejection cylinder 32, so that the forming flange and the lower cavity 221 are separated; finally, the forming flange is driven upward by the material taking manipulator to be separated from the ring die 23, and the demolding quality is improved by step-by-step demolding.

[0053] The working principle of the present invention is as follows: through the split structure of the upper mold 21, the lower mold 22 and the ring mold 23, during demoulding, demoulding is carried out in sequence, thereby improving the continuous molding quality, and at the same time, the single demoulding force is reduced to avoid local stress deformation; since the guide arc surface 224 is a convex arc, when the high-temperature airflow flows through, due to the friction between the high-temperature gas and the guide arc surface 224, the high-temperature airflow will be driven to flow along the guide arc surface 224, and the outer convex right angle of the lower cavity 221 will be locally heated through the guide arc surface 224; after the molten metal enters the lower cavity 221, the closer it is to the outer convex right angle, the higher the temperature, the better the fluidity, the smaller the surface tension, and it is easier to fill the outer convex right angle, thereby improving the forming quality; after the hot airflow impacts the circulation groove 225, under the action of the wall surface of the circulation groove 225, it flows along the arc wall surface, and finally flows to the guide arc surface 22 4 is locally heated. After flowing through the guide arc surface 224, it flows obliquely downward. Since the temperature of the hot air flow itself is relatively high, it will flow upward under the action of buoyancy, thereby performing local air flow microcirculation and improving the heating efficiency. During demoulding, since the contact area between the molding flange and the inner wall of the ring die 23 and the wall of the lower cavity 221 is larger than the contact area between the upper die 21 and the molding flange, that is, the outer friction force on the molding flange is larger than the inner friction force, the upper die 21 and the molding flange are separated. The metal flange includes an upper disk body and a lower sealing layer, and the thickness of the disk body is greater than the thickness of the sealing layer. The molding flange is driven upward by the ring die 23 to demould the molding flange and the lower die 22. The material taking manipulator is inserted into the middle of the molding flange, so that the molding flange and the ring die 23 are separated. Through layered demoulding, the single demoulding force is reduced, thereby preventing damage caused by excessive local force and ensuring the demoulding quality.

[0054] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A metal flange casting device for eliminating surface pores, the casting device is used to cast a workpiece, characterized in that: The casting device comprises a supporting device (1), a molding device (2), a power device (3), a temperature regulating device (4), an injection tube (5) and an air guide tube (6); the molding device (2) is connected to the supporting device (1); the power device (3) is tightly connected to the supporting device (1); the temperature regulating device (4) and the molding device (2) are connected via a pipeline; the injection tube (5) is connected to the molding device (2); the molding device (2) comprises an upper mold (21); the upper mold (21) is tightly connected to the supporting device (1); a plurality of drainage grooves (211) are provided on the upper mold (21); the injection tube (5) and the air guide tube (6) are respectively inserted into the drainage grooves (211); The support device (1) comprises a frame (11), a mounting seat (12) and a base (13), wherein the base (13) is tightly connected to the frame (11); the molding device (2) further comprises a lower die (22) and a ring die (23), wherein the lower die (22) is tightly connected to the base (13); the power device (3) comprises a pressure cylinder (31), wherein two pressure cylinders (31) are provided, and the two pressure cylinders (31) are tightly connected to the frame (11), respectively; an output end of the pressure cylinder (31) is tightly connected to the mounting seat (12), and the upper die (21) is tightly connected to the mounting seat (12); The lower mold (22) is provided with a lower mold cavity (221), the ring mold (23) is placed in the lower mold cavity (221), and the ring mold (23) and the lower mold cavity (221) are movably connected; The temperature control device (4) comprises a hot air pipe (42), a cooling cavity (222) is provided on the outside of the lower cavity (221), a flow guiding arc surface (224) is provided at the inner corner of the cooling cavity (222), and a circulation groove (225) is provided at the outer corner of the cooling cavity (222), the circulation groove (225) is arranged in an arc shape in a vertical cross section, the circulation groove (225) is opened toward one side of the flow guiding arc surface (224), the hot air pipe (42) and the circulation groove (225) are connected by pipeline, and the emission direction of the circulation groove (225) is inclined downward along the tangent direction of the flow guiding arc surface (224).

2. The metal flange casting equipment for eliminating surface pores according to claim 1 is characterized in that: The hot air pipe (42) is arranged vertically along the outer side of the circulation groove (225) in a spraying direction.

3. The metal flange casting equipment for eliminating surface pores according to claim 2 is characterized in that: The power device (3) further comprises a plurality of ejection cylinders (32), the cylinder bodies of the ejection cylinders (32) being tightly connected to the frame (11), the base (13) being provided with a plurality of transmission grooves, the output ends of the ejection cylinders (32) passing through the transmission grooves, the lower die (22) being provided with a plurality of positioning grooves (223), the output ends of the ejection cylinders (32) being inserted into the positioning grooves (223), and the output ends of the ejection cylinders (32) being in contact with the bottom end of the ring die (23).

4. The metal flange casting equipment for eliminating surface pores according to claim 3 is characterized in that: The power device (3) further comprises a plurality of connecting pipes (43) and liquid outlet pipes (44), the connecting pipes (43) and liquid outlet pipes (44) being respectively located at the upper end of the output end of the ejection cylinder (32); a central flow channel (231) is provided on the ring die (23); an inlet of the central flow channel (231) is connected to the connecting pipe (43); an outlet of the central flow channel (231) is connected to the liquid outlet pipe (44); a cooling liquid pipe (41) is provided on one side of the cooling chamber (222); the cooling liquid pipe (41) is connected to the cooling chamber (222); and a lower end of the connecting pipe (43) is connected to the cooling chamber (222).

5. The metal flange casting equipment for eliminating surface pores according to claim 4 is characterized in that: The height of the ring die (23) is not less than the thickness of the finished flange.

6. The metal flange casting equipment for eliminating surface pores according to claim 4, characterized in that: The number of the connecting pipes (43) is half of the number of the ejection cylinders (32).

7. The casting method of a metal flange casting equipment for eliminating surface pores according to claim 5, characterized in that: The casting method comprises the following steps: S1, the upper mold (21) and the lower mold (22) are molded together; S2, injecting air into the circulation groove (225) through the hot air pipe (42), and heating the corner of the lower cavity (221) through the guide arc surface (224); S3, injecting molten metal into the lower cavity (221) through the injection tube (5); S4, injecting cooling medium into the cooling cavity (222) through the cooling liquid pipe (41), and part of the cooling medium enters the middle flow channel (231) through the connecting pipe (43) to perform cooling and molding; S5, the upper die (21) moves upward and separates from the forming flange, the ejection cylinder (32) drives the ring die (23) and the formed flange to move upward along the lower cavity (221), and a material taking manipulator is provided to be inserted into the middle of the flange, thereby driving the forming flange and the ring die (23) to separate.

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