A precision casting process for ultra-high chromium casting balls

Abstract

The invention discloses a precision casting process for ultra-high chromium casting balls, which belongs to the technical field of casting molds, and includes a bottom support frame, a casting ball casting mold is embedded in a port at the top of the bottom support frame, and a molten liquid casting component for centrifugally dehydrating the molten liquid by rotation is connected to the top of the casting ball casting mold. In the present invention, the rotating airflow contracts in a cylindrical tube and a conical tube and flows toward the center, and a secondary vortex is formed upward to flow into the tangential outlet pipe of the airflow through a discharge pipe, and the water vapor is strongly rotated by the guiding effect of the guide blades. In this process, the air in the fixed mold and the movable mold can also be guided to flow toward the discharge pipe to a certain extent, so that the moisture content in the molten liquid, the movable mold and the fixed mold can be reduced, and the water vapor in the molten liquid is liquefied and mixed with the molten liquid. The liquefied water vapor mixed with the molten liquid will cause the material to form a shortage phenomenon, which is beneficial to improve the strength of the chromium casting ball and improve the precision of the chromium casting ball.

Description

Technical Field

[0001] The invention belongs to the technical field of casting molds, and in particular relates to a precision casting process for ultra-high chromium casting balls. Background Art

[0002] Casting is a relatively early metal heat processing technology mastered by humans, with a history of about 6,000 years. China entered the heyday of bronze castings between 1700 BC and 1000 BC, and the technology had reached a very high level. Casting is a method of pouring liquid metal into a casting cavity that is adapted to the shape of the part, and then cooling and solidifying it to obtain a part or blank. The cast material is mostly a metal that was originally solid but heated to a liquid state (for example: copper, iron, aluminum, tin, lead, etc.), and the material of the mold can be sand, metal or even ceramic. Depending on different requirements, the methods used will also be different.

[0003] The prior art discloses some invention patents in the field of casting mold technology, among which Chinese patent CN111842841B discloses an extrusion casting mold that is easy to disassemble, including a molding mechanism, a top plate, a mounting screw, a side baffle, a cylinder, and a supporting bottom plate. The upper end of the molding mechanism penetrates the middle end of the top plate. During the injection of aluminum liquid into the tube body, the gap groove, the liquid inlet hole and the liquid inlet are used to ensure the normal circulation of the aluminum liquid. The structure of the funnel body that is wide at the top and narrow at the bottom is used to prevent the aluminum liquid from splashing during the flow. At the same time, the two funnel bodies can block the backflow of the aluminum liquid, prevent the aluminum liquid from being added too quickly and flowing back to the inlet end of the tube body, and prevent the operator from being scalded by the high-temperature aluminum liquid. As the aluminum liquid flows, the rotating ball rotates inside the rotating groove, and the cone and the burr rotate at this time, which improves the effect of fully puncturing the air bubbles inside the aluminum liquid, ensures that the air bubbles inside the aluminum liquid are eliminated, and prevents the molded wheel hub casting from having many pinholes inside, thereby improving the quality of the casting.

[0004] The precision casting process of ultra-high chromium cast balls in the prior art still has some shortcomings during use. Since the chromium cast ball melt inevitably contains a small amount of water, and the surface temperature of the chromium cast ball casting mold tends to the ambient temperature, the temperature difference between the surface of the mold and the melt is large. The water in the melt will liquefy when it comes into contact with the mold. The liquefied water mixes with the melt and causes the undesirable phenomenon of material shortage, which not only reduces the casting accuracy of the chromium cast ball, but also reduces the strength of the chromium cast ball to a certain extent.

[0005] Based on this, the present invention designs a precision casting process for ultra-high chromium cast balls to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the problems that the precision casting process of ultra-high chromium cast balls in the prior art still has some shortcomings during use. Since the chromium cast ball molten liquid inevitably contains a small amount of water, and the surface temperature of the chromium cast ball casting mold tends to the ambient temperature, resulting in a large temperature difference between the surface of the mold and the molten liquid, the water in the molten liquid will liquefy when it comes into contact with the mold, and the liquefied water will mix into the molten liquid to cause the undesirable phenomenon of material shortage, which not only reduces the casting accuracy of the chromium cast ball, but also reduces the strength of the chromium cast ball to a certain extent. A precision casting process of ultra-high chromium cast balls is proposed.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A precision casting process for ultra-high chromium casting balls, comprising a bottom support frame, a casting ball casting mold is embedded in a port at the top of the bottom support frame, a molten liquid casting assembly for centrifugally dehydrating the molten liquid by rotation is connected to the top of the casting ball casting mold, a hydraulic cylinder is fixedly installed on the top of the molten liquid casting assembly, a top support frame is fixedly installed on the outer surface of the hydraulic cylinder body, and the bottom of the top support frame is fixedly installed on the top of the top support frame;

[0009] An airflow reserve component for collecting emissions from a molten liquid casting component is fixedly mounted on the side end surface of the top support frame. The molten liquid casting component is connected to the ball casting mold via the airflow reserve component. The airflow reserve component dehydrates the collected emissions and then discharges them into the ball casting mold for preheating treatment.

[0010] As a further description of the above technical solution:

[0011] The ball casting mold comprises a bottom assembly seat, which is embedded in a port on the top of a bottom support frame, and a fixed mold is detachably mounted on the top of the bottom assembly seat.

[0012] As a further description of the above technical solution:

[0013] A top-layer assembly seat is arranged above the bottom-layer assembly seat, and the top-layer assembly seat is slidably connected to the inner side of the top-layer support frame. A movable mold is detachably mounted at the bottom of the top-layer assembly seat corresponding to the position of the fixed mold.

[0014] As a further description of the above technical solution:

[0015] The molten liquid casting assembly includes a conical cylinder, the bottom of which is clamped on the top of the movable mold, a cylindrical cylinder is detachably mounted on the top of the conical cylinder, a cyclone separation tube is fixedly sleeved on the top of the cylindrical cylinder, a mesh support plate is clamped in the pipe opening at the top of the cyclone separation tube, the bottom of the mesh support plate is rotatably connected to a rotating shaft through a bearing, and a guide blade is fixedly mounted on the other end of the rotating shaft.

[0016] As a further description of the above technical solution:

[0017] The top of the cyclone separation tube is fixedly connected with a discharge pipe, the outer circumferential surface of the discharge pipe is tangentially connected with an air flow tangential outlet pipe, and the outer circumferential surface of the cylindrical tube is tangentially connected with a molten liquid tangential inlet pipe.

[0018] As a further description of the above technical solution:

[0019] The airflow storage component includes an airflow storage bag, the top of the airflow storage bag is connected to an airflow absorption tube, the other end of the airflow absorption tube is connected to an end close to the airflow tangential lead-out tube, the bottom of the airflow storage bag is connected to an airflow discharge pipe, the other end of the airflow discharge pipe is connected to a docking cover, and the docking cover is fixedly connected to the bottom of the fixed mold.

[0020] As a further description of the above technical solution:

[0021] An air flow inlet is provided at the bottom of the fixed mold at a position corresponding to the docking cover, and a pressure release component is sleeved in the air flow inlet. The pressure release component includes an air pressure release pipe, and the air pressure release pipe is movably sleeved in the air flow inlet. The top end of the air pressure release pipe is a curved surface that combines with the inner surface of the fixed mold to form a spherical surface.

[0022] As a further description of the above technical solution:

[0023] An air pressure release port is provided at the top of the circumferential surface of the air pressure release tube, and a connecting sleeve is fixedly connected to the bottom of the air pressure release tube. A connecting shaft is sleeved inside the connecting sleeve, and the top end of the connecting shaft is fixedly connected to the bottom of the fixed mold. The opposite surface of the fixed mold and the connecting sleeve are fixedly connected by a supporting spring, and the supporting spring is sleeved on the outer surface of the connecting shaft.

[0024] As a further description of the above technical solution:

[0025] The top of the discharge pipe is fixedly connected to the bottom of the hydraulic cylinder, and the airflow reserve bag is filled with a desiccant.

[0026] As a further description of the above technical solution:

[0027] The side end surface of the bottom support frame is provided with a flipping and unloading assembly, and the flipping and unloading assembly includes two flipping shafts, and the adjacent ends of the two flipping shafts are respectively fixedly connected to the two side end surfaces of the bottom assembly seat, and the other end of one of the flipping shafts is fixedly connected to a flipping gear, and a transmission tooth plate is meshed on the tooth surface of the flipping gear, and the top of the transmission tooth plate is fixedly connected to a surface close to the top assembly seat, and the other end of the other flipping shaft is fixedly connected to a docking plate, and the opposite surfaces of the docking plate and the bottom support frame are fixedly connected by a flipping spring, and the flipping spring is sleeved on the outer surface of the flipping shaft.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. In the present invention, the molten liquid for chromium casting ball casting is injected into the molten liquid tangential introduction pipe by high pressure injection. The molten liquid entering the molten liquid tangential introduction pipe enters the cyclone separation pipe along the tangential direction. The molten liquid introduced along the tangential direction will rotate in the cyclone separation pipe. The water vapor mixed in the molten liquid will generate strong rotation under the guiding effect of the guide blades. The water vapor spirally descends along the cylindrical tube into the conical tube. The molten liquid with high density is thrown to the inner wall of the conical tube under the action of centrifugal force, and falls along the inner wall of the conical tube under the action of gravity and flows into the fixed mold and the movable mold. The rotating airflow is in the cylindrical tube and the conical tube. The air in the cylinder shrinks and flows toward the center, forming a secondary vortex upwards and flowing into the tangential outlet pipe of the air flow through the discharge pipe. The water vapor generates a strong rotation under the guiding effect of the guide vanes. In this process, the air in the fixed mold and the movable mold can be guided to flow toward the discharge pipe to a certain extent, thereby reducing the moisture content in the molten liquid, the movable mold and the fixed mold, and preventing the water vapor in the molten liquid from liquefying and mixing with the molten liquid when the molten liquid enters the fixed mold and the movable mold. The mixing of the liquefied water vapor and the molten liquid will cause the material to form a shortage phenomenon, which is beneficial to improve the strength of the chrome casting ball and improve the precision of the chrome casting ball.

[0030] 2. In the present invention, as the internal pressure of the docking cover increases, the air pressure release tube slides on the outer surface of the connecting shaft through the connecting sleeve under the push of pressure and squeezes the supporting spring. After the air pressure release tube rises, the airflow in the docking cover enters the fixed mold and the movable mold, and the airflow preheats the movable mold and the fixed mold. By preheating the fixed mold and the movable mold, the temperature difference between the movable mold and the fixed mold and the molten liquid can be reduced, thereby reducing the degree of liquefaction of water vapor in the molten liquid, and further reducing the possibility of material shortage.

[0031] 3. In the present invention, after the chrome casting ball is formed, the hydraulic cylinder is controlled to retract, and the top assembly seat drives the movable mold to separate from the fixed mold. At the same time, the top assembly seat also drives the transmission gear plate to move on the tooth surface of the flip gear, and then drives the bottom assembly seat to flip, thereby realizing automatic unloading of the movable mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of a precision casting process for ultra-high chromium casting balls proposed by the present invention;

[0033] Figure 2 It is a schematic diagram of the left and right isometric axial structure of a precision casting process for an ultra-high chromium cast ball proposed by the present invention;

[0034] Figure 3 It is a schematic diagram of the upper and lower isometric axial structure of a precision casting process for an ultra-high chromium cast ball proposed by the present invention;

[0035] Figure 4 A schematic diagram of the structure of an airflow reserve component in a precision casting process of an ultra-high chromium cast ball proposed by the present invention;

[0036] Figure 5 This is a structural schematic diagram of a docking cover in a precision casting process of an ultra-high chromium cast ball proposed by the present invention;

[0037] Figure 6 This is a schematic diagram of the structure of a precision casting process of an ultra-high chromium casting ball proposed by the present invention after being disassembled;

[0038] Figure 7 A precision casting process for ultra-high chromium casting balls proposed by the present invention Figure 6 The enlarged structural diagram at A in the middle;

[0039] Figure 8 This is a structural schematic diagram of another perspective after the precision casting process of an ultra-high chromium casting ball proposed by the present invention is disassembled;

[0040] Fig. 9 This is a schematic structural diagram of a pressure release component in a precision casting process of an ultra-high chromium cast ball proposed by the present invention;

[0041] Fig.10 A precision casting process for ultra-high chromium casting balls proposed by the present invention Fig. 9 Schematic diagram of the enlarged structure at point B.

[0042] Legend:

[0043] 1. Bottom support frame; 2. Ball casting mold; 201. Bottom assembly seat; 202. Fixed mold; 203. Top assembly seat; 204. Moving mold; 3. Molten liquid casting assembly; 301. Conical cylinder; 302. Cylindrical cylinder; 303. Cyclone separation tube; 304. Molten liquid tangential introduction tube; 305. Mesh support plate; 306. Guide blades; 307. Drain pipe; 308. Air flow tangential outlet pipe; 4. Top support frame ; 5. Hydraulic cylinder; 6. Airflow reserve assembly; 601. Airflow absorption tube; 602. Airflow reserve bag; 603. Airflow discharge pipe; 604. Docking cover; 7. Flipping and unloading assembly; 701. Flipping shaft; 702. Flipping gear; 703. Transmission gear plate; 8. Pressure release assembly; 801. Air pressure release tube; 802. Connecting sleeve; 803. Connecting shaft; 804. Support spring; 9. Docking plate; 10. Flipping spring. DETAILED DESCRIPTION

[0044] 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.

[0045] See also Figure 1-10 The present invention provides a technical solution: a precision casting process for ultra-high chromium casting balls, comprising a bottom support frame 1, a ball casting mold 2 is embedded in a port at the top of the bottom support frame 1, a molten liquid casting component 3 for centrifugally dehydrating the molten liquid by rotation is connected to the top of the molten liquid casting component 2, a hydraulic cylinder 5 is fixedly installed on the top of the molten liquid casting component 3, a top support frame 4 is fixedly installed on the outer surface of the hydraulic cylinder 5 body, and the bottom of the top support frame 4 is fixedly installed on the top of the top support frame 4;

[0046] An airflow reserve component 6 for collecting emissions from the molten liquid casting component 3 is fixedly installed on the side end surface of the top-level support frame 4. The molten liquid casting component 3 is connected to the ball casting mold 2 through the airflow reserve component 6. The airflow reserve component 6 dehydrates the collected emissions and then discharges them into the ball casting mold 2 for preheating treatment.

[0047] Specifically, the ball casting mold 2 includes a bottom assembly seat 201, which is embedded in the port at the top of the bottom support frame 1, and a fixed mold 202 is detachably installed on the top of the bottom assembly seat 201. A top assembly seat 203 is arranged above the bottom assembly seat 201, and the top assembly seat 203 is slidably connected to the inner side of the top support frame 4. A movable mold 204 is detachably installed at the position of the fixed mold 202 at the bottom of the top assembly seat 203. The molten liquid casting component 3 includes a conical cylinder 301, and the bottom of the conical cylinder 301 is clamped on the top of the movable mold 204. A cylindrical cylinder 302 is detachably mounted on the top of the conical cylinder 301, a cyclone separation tube 303 is fixedly sleeved on the top of the cylindrical cylinder 302, a mesh support plate 305 is clamped in the pipe opening at the top of the cyclone separation tube 303, the bottom of the mesh support plate 305 is rotatably connected to a rotating shaft through a bearing, a guide blade 306 is fixedly mounted on the other end of the rotating shaft, a discharge pipe 307 is fixedly connected to the top of the cyclone separation tube 303, an outer circumferential surface of the discharge pipe 307 is tangentially connected to an airflow tangential outlet pipe 308, and an outer circumferential surface of the cylindrical cylinder 302 is tangentially connected to a molten liquid tangential inlet pipe 304.

[0048] The specific implementation method is as follows: the hydraulic cylinder 5 is controlled to perform an extension movement, and the top-level assembly seat 203 slides on the inner side of the top-level support frame 4 under the push of the hydraulic cylinder 5 until the movable mold 204 is connected to the fixed mold 202 under the drive of the top-level support frame 4. Then, the staff injects the molten liquid for chromium casting ball into the tangential introduction pipe 304 of the molten liquid by high-pressure injection. The molten liquid entering the tangential introduction pipe 304 of the molten liquid enters the cyclone separation pipe 303 along the tangential direction. The molten liquid introduced along the tangential direction will rotate in the cyclone separation pipe 303. The water vapor mixed in the molten liquid generates a strong rotation under the guiding effect of the guide blades 306, and the water vapor spirals downward along the cylindrical tube 302. After entering the conical cylinder 301, the molten liquid with high density is thrown toward the inner wall of the conical cylinder 301 under the action of centrifugal force, and falls along the inner wall of the conical cylinder 301 under the action of gravity and flows into the fixed mold 202 and the movable mold 204. The rotating airflow contracts in the cylindrical cylinder 302 and the conical cylinder 301 and flows toward the center, forming a secondary vortex upward and flowing into the airflow tangential outlet pipe 308 through the discharge pipe 307. The water vapor generates strong rotation due to the guiding effect of the guide blade 306. In this process, the air in the fixed mold 202 and the movable mold 204 can be guided to flow toward the discharge pipe 307 to a certain extent, thereby reducing the moisture content in the molten liquid, the movable mold 204 and the fixed mold 202.

[0049] Specifically, the airflow reserve component 6 includes an airflow reserve bag 602, the top of the airflow reserve bag 602 is connected to an airflow absorption tube 601, the other end of the airflow absorption tube 601 is connected to an end close to the airflow tangential lead-out tube 308, the bottom of the airflow reserve bag 602 is connected to an airflow discharge pipe 603, the other end of the airflow discharge pipe 603 is connected to a docking cover 604, the docking cover 604 is fixedly connected to the bottom of the fixed mold 202, and an airflow inlet is opened at the position of the bottom of the fixed mold 202 corresponding to the docking cover 604, and a pressure release component 8 is sleeved in the airflow inlet, and the pressure release component 8 includes an air pressure release pipe 801, and the air pressure release pipe 801 is movably sleeved on The air flow is introduced into the port, the top of the air pressure release tube 801 is a curved surface combined with the inner surface of the fixed mold 202 to form a spherical surface, the top of the circumferential surface of the air pressure release tube 801 is provided with an air pressure release port, the bottom of the air pressure release tube 801 is fixedly connected with a connecting sleeve 802, a connecting shaft 803 is sleeved inside the connecting sleeve 802, the top of the connecting shaft 803 is fixedly connected to the bottom of the fixed mold 202, the opposite surfaces of the fixed mold 202 and the connecting sleeve 802 are fixedly connected by a supporting spring 804, the supporting spring 804 is sleeved on the outer surface of the connecting shaft 803, the top of the discharge pipe 307 is fixedly connected to the bottom of the hydraulic cylinder 5, and the air flow reserve bag 602 is filled with a desiccant.

[0050] The specific implementation method is as follows: before injecting the molten liquid into the fixed mold 202 and the movable mold 204, the valve on the airflow reserve bag 602 needs to be opened first. The airflow reserve bag 602 is used to store water vapor inhaled through the airflow absorption tube 601. After the water vapor is dehydrated in the airflow reserve bag 602, it flows into the docking cover 604 through the airflow discharge pipe 603. As the internal pressure of the docking cover 604 increases, the air pressure release pipe 801 slides on the outer surface of the connecting shaft 803 through the connecting sleeve 802 under the push of pressure, and squeezes the support spring 804. After the air pressure release pipe 801 rises, the airflow in the docking cover 604 enters the fixed mold 202 and the movable mold 204, and the airflow preheats the movable mold 204 and the fixed mold 202. By preheating the fixed mold 202 and the movable mold 204, the temperature difference between the movable mold 204 and the fixed mold 202 and the molten liquid can be reduced.

[0051] Specifically, a flipping and unloading component 7 is provided on the side end face of the bottom support frame 1, and the flipping and unloading component 7 includes two flipping shafts 701, and the adjacent ends of the two flipping shafts 701 are respectively fixedly connected to the two side end faces of the bottom assembly seat 201, and the other end of one of the flipping shafts 701 is fixedly connected to a flipping gear 702, and a transmission tooth plate 703 is meshed on the tooth surface of the flipping gear 702, and the top of the transmission tooth plate 703 is fixedly connected to a surface adjacent to the top assembly seat 203, and the other end of the other flipping shaft 701 is fixedly connected to a docking plate 9, and the opposite surface of the docking plate 9 and the bottom support frame 1 is fixedly connected by a flipping spring 10, and the flipping spring 10 is sleeved on the outer surface of the flipping shaft 701.

[0052] The specific implementation method is as follows: after the chrome casting ball is formed, the hydraulic cylinder 5 is controlled to retract, and the top assembly seat 203 drives the movable mold 204 to separate from the fixed mold 202. At the same time, the top assembly seat 203 will also drive the transmission gear plate 703 to move on the tooth surface of the flip gear 702, thereby driving the bottom assembly seat 201 to flip.

[0053] Working principle, when using:

[0054] The hydraulic cylinder 5 is controlled to stretch. Under the push of the hydraulic cylinder 5, the top assembly seat 203 slides on the inner side of the top support frame 4 until the movable mold 204 is connected with the fixed mold 202 under the drive of the top support frame 4. Then the staff injects the molten liquid for chromium casting ball into the molten liquid tangential introduction pipe 304 by high pressure injection. The molten liquid entering the molten liquid tangential introduction pipe 304 enters the cyclone separation pipe 303 along the tangential direction. The molten liquid introduced along the tangential direction will rotate in the cyclone separation pipe 303. The water vapor mixed in the molten liquid generates strong rotation under the guiding effect of the guide blades 306. The water vapor spirally descends along the cylindrical tube 302 into the conical tube 301. The molten liquid with high density is thrown to the inner wall of the conical tube 301 under the action of centrifugal force, and moves along the conical tube 301 under the action of gravity. The inner wall of the chrome casting mold 302 falls down and flows into the fixed mold 202 and the movable mold 204. The rotating airflow contracts in the cylindrical tube 302 and the conical tube 301 and flows toward the center, forming a secondary vortex upward and flowing into the airflow tangential outlet pipe 308 through the discharge pipe 307. The water vapor generates a strong rotation due to the guiding effect of the guide blades 306. In this process, the air in the fixed mold 202 and the movable mold 204 can be guided to flow toward the discharge pipe 307 to a certain extent, thereby reducing the moisture content in the molten liquid, the movable mold 204 and the fixed mold 202, and preventing the water vapor in the molten liquid from liquefying and mixing with the molten liquid when the molten liquid enters the fixed mold 202 and the movable mold 204. The mixing of the liquefied water vapor and the molten liquid will cause the material to form a shortage phenomenon, which is beneficial to improving the strength of the chrome casting ball and improving the precision of the chrome casting ball.

[0055] Before injecting the molten liquid into the fixed mold 202 and the movable mold 204, the valve on the airflow reserve bag 602 needs to be opened first. The airflow reserve bag 602 is used to store water vapor inhaled by the airflow absorption tube 601. After the water vapor is dehydrated in the airflow reserve bag 602, it flows into the docking cover 604 through the airflow discharge pipe 603. As the internal pressure of the docking cover 604 increases, the air pressure release pipe 801 slides on the outer surface of the connecting shaft 803 through the connecting sleeve 802 under the push of pressure, and squeezes the support spring 804. After the air pressure release pipe 801 rises, the airflow in the docking cover 604 enters the fixed mold 202 and the movable mold 204, and the airflow preheats the movable mold 204 and the fixed mold 202. By preheating the fixed mold 202 and the movable mold 204, the temperature difference between the movable mold 204 and the fixed mold 202 and the molten liquid can be reduced, thereby reducing the liquefaction degree of water vapor in the molten liquid, and further reducing the possibility of material shortage.

[0056] After the chrome casting ball is formed, the hydraulic cylinder 5 is controlled to retract, and the top assembly seat 203 drives the movable mold 204 to separate from the fixed mold 202. At the same time, the top assembly seat 203 also drives the transmission gear plate 703 to move on the tooth surface of the flip gear 702, and then drives the bottom assembly seat 201 to flip, thereby realizing automatic unloading of the movable mold 204.

[0057] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A precision casting device for ultra-high chromium casting balls, comprising a bottom support frame (1), characterized in that: A ball casting mold (2) is embedded in a port at the top of the bottom support frame (1); a molten liquid casting assembly (3) for centrifugally dehydrating the molten liquid by rotation is connected to the top of the ball casting mold (2); a hydraulic cylinder (5) is fixedly mounted on the top of the molten liquid casting assembly (3); a top support frame (4) is fixedly mounted on the outer surface of the hydraulic cylinder (5); the ball casting mold (2) comprises a bottom assembly seat (201); the bottom assembly seat (201) is embedded in a port at the top of the bottom support frame (1); a fixed mold (202) is detachably mounted on the top of the bottom assembly seat (201); a top assembly seat (203) is arranged above the bottom assembly seat (201); the top assembly seat (203) is slidably connected to the inner side of the top support frame (4); a movable mold (204) is detachably mounted on the bottom of the top assembly seat (203) at a position corresponding to the fixed mold (202); An airflow storage component (6) for collecting discharge from the molten liquid casting component (3) is fixedly mounted on the side end surface of the top support frame (4); the molten liquid casting component (3) is connected to the ball casting mold (2) via the airflow storage component (6); the airflow storage component (6) dehydrates the collected discharge and then discharges it into the ball casting mold (2) for preheating treatment; The molten liquid casting assembly (3) comprises a conical cylinder (301), the bottom of the conical cylinder (301) is clamped on the top of the movable mold (204), a cylindrical cylinder (302) is detachably mounted on the top of the conical cylinder (301), a cyclone separation tube (303) is fixedly sleeved on the top of the cylindrical cylinder (302), a mesh support plate (305) is clamped in the pipe opening at the top of the cyclone separation tube (303), the bottom of the mesh support plate (305) is rotatably connected to a rotating shaft via a bearing, a guide blade (306) is fixedly mounted on one end of the rotating shaft, a discharge pipe (307) is fixedly connected to the top of the cyclone separation tube (303), an outer circumferential surface of the discharge pipe (307) is tangentially connected to an airflow tangential outlet pipe (308), and an outer circumferential surface of the cylindrical cylinder (302) is tangentially connected to a molten liquid tangential inlet pipe (304); The airflow reserve component (6) comprises an airflow reserve bag (602), the top of the airflow reserve bag (602) is connected to an airflow absorption tube (601), one end of the airflow absorption tube (601) is connected to an end close to the airflow tangential outlet tube (308), the bottom of the airflow reserve bag (602) is connected to an airflow discharge tube (603), the other end of the airflow discharge tube (603) is connected to a docking cover (604), and the docking cover (604) is fixedly connected to the bottom of the fixed mold (202).

2. The precision casting device for ultra-high chromium casting balls according to claim 1 is characterized in that: An air flow inlet is provided at the bottom of the fixed mold (202) at a position corresponding to the docking cover (604), and a pressure release component (8) is sleeved in the air flow inlet. The pressure release component (8) comprises an air pressure release pipe (801), and the air pressure release pipe (801) is movably sleeved in the air flow inlet. The top end of the air pressure release pipe (801) is a curved surface that combines with the inner surface of the fixed mold (202) to form a spherical surface.

3. The precision casting device for ultra-high chromium casting ball according to claim 2, characterized in that: An air pressure release port is provided at the top of the circumferential surface of the air pressure release tube (801); a connecting sleeve (802) is fixedly connected to the bottom of the air pressure release tube (801); a connecting shaft (803) is sleeved inside the connecting sleeve (802); a top end of the connecting shaft (803) is fixedly connected to the bottom of the fixed mold (202); the opposite surfaces of the fixed mold (202) and the connecting sleeve (802) are fixedly connected via a supporting spring (804); and the supporting spring (804) is sleeved on the outer surface of the connecting shaft (803).

4. The precision casting device for ultra-high chromium casting balls according to claim 3 is characterized in that: The top of the discharge pipe (307) is fixedly connected to the bottom of the hydraulic cylinder (5), and the airflow reserve bag (602) is filled with a desiccant.

5. The precision casting device for ultra-high chromium casting ball according to claim 1, characterized in that: The side end surface of the bottom support frame (1) is provided with a flipping and unloading assembly (7), the flipping and unloading assembly (7) comprising two flipping shafts (701), and the adjacent ends of the two flipping shafts (701) are respectively fixedly connected to the side end surfaces of the bottom assembly seat (201), and the other end of one of the flipping shafts (701) is fixedly connected to a flipping gear (702), the tooth surface of the flipping gear (702) is meshed with a transmission tooth plate (703), the top of the transmission tooth plate (703) is fixedly connected to a surface adjacent to the top assembly seat (203), and the other end of the other flipping shaft (701) is fixedly connected to a docking plate (9), and the opposite surfaces of the docking plate (9) and the bottom support frame (1) are fixedly connected via a flipping spring (10), and the flipping spring (10) is sleeved on the outer surface of the flipping shaft (701).

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