Side row forming and polishing device for aluminum alloy piston of top large combustion chamber

Abstract

The invention discloses a top large combustion chamber aluminum alloy piston side row forming and polishing device, and belongs to the technical field of runner polishing. A mold core assembly matched with a mold side row runner is arranged, a narrow grinding space is reserved between the mold core assembly and the side row runner, and in the polishing process with the help of abrasive particle flow, the grinding effect is improved; abrasive particles circularly flow through the grinding space in a reciprocating mode under certain pressure to polish the side drainage flow channel and increase the pressure of abrasive particle flow on the wall face of the side drainage flow channel, in addition, an upper mold core on the mold core assembly is arranged to be in a rotating installation mode, a plurality of injection pipes matched with a sound air supply structure are additionally arranged on the upper mold core, and in the rotating process of the upper mold core, the abrasive particles are injected into the side drainage flow channel. The molecular vibration frequency of airflow is increased under the ultrasonic effect to form pulse jet flow, the airflow is screwed in and jetted to act on abrasive particles, it is effectively guaranteed that all points of the inner section of the side drainage flow channel are ground by strong abrasive particle flow, and therefore the overall polishing effect of the abrasive particle flow on the side drainage flow channel is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of flow channel polishing, and more specifically to a side row forming and polishing device for a top large combustion chamber aluminum alloy piston. Background Art

[0002] The top large combustion chamber aluminum alloy piston forming mold is a special tool used to manufacture engine pistons. Aluminum alloy pistons are widely used in internal combustion engines such as automobiles and motorcycles. They are favored because of their light weight and good heat dissipation performance.

[0003] The traditional piston forming mold includes a pouring system, an exhaust system and a cooling system, wherein the pouring system involves the pouring and drainage of molten aluminum. In this process, after the molten aluminum is poured into the mold, the excess molten aluminum needs to be discharged to the outside, so a side drain is made on the side of the mold for discharging excess molten aluminum. The mold and the side drain need to be polished on their inner walls before use to ensure that the cast mold side drain has a high-precision and smooth surface. The polishing device in the prior art is similar to a polishing head and is not suitable for polishing the inner wall of the flow channel of a complex curved surface mold.

[0004] In view of the above problems, the abrasive flow machining method is used to polish the inner wall of the mold. Compared with the traditional polishing method, the abrasive flow machining method has the advantages of strong material applicability, good processing accessibility and high processing efficiency. However, considering that the inner wall of the mold side row has a certain straight-through size, the use of abrasive flow requires a larger flow rate and pressure. In the process of the abrasive flow entering the flow channel, it is difficult to ensure that all points on the inner cross-section are subjected to strong fluid medium impact grinding, which can easily lead to insufficient erosion at a certain point on the inner wall of the mold side row, and ultimately cause uneven polishing.

[0005] Therefore, we propose a top large combustion chamber aluminum alloy piston side row forming and polishing device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the existing practical problems. Compared with the existing technology, a top large combustion chamber aluminum alloy piston side discharge forming and polishing device is provided. A core assembly is arranged to match the side discharge channel of the mold. A narrow grinding space is reserved between the core assembly and the side discharge channel. During the polishing process with the help of abrasive flow, the wall pressure of the abrasive flow on the side discharge channel is increased. In addition, the upper core on the core assembly is arranged to be a rotating installation type, and a plurality of injection pipes matched with the acoustic air supply structure are added to the upper core. During the rotation of the upper core, the molecular vibration frequency of the airflow is intensified under the action of ultrasound to form a pulse jet. The airflow swirls and sprays on the abrasive, effectively ensuring that each point in the cross section of the side discharge channel is subjected to strong abrasive flow grinding, thereby enhancing the overall grinding effect of the abrasive flow on the side discharge channel.

[0007] The objectives of the present invention can be achieved through the following technical solutions: a top large combustion chamber aluminum alloy piston side discharge forming and polishing device, including an operating table and an operating box, the operating table is provided with a clamp for limiting the front and rear symmetrically distributed molds, the mold is provided with a pair of side discharge channels respectively connected to the sides of the cavity, the top of the operating box is fixedly connected to a top plate, the bottom of the top plate is fixedly connected to a pair of abrasive feeding tubes respectively connected to the top of the side discharge channels, the abrasive feeding tube is sleeved with a conical tube that rotates on the bottom end of the top plate, the bottom of the conical tube is fixed with a core assembly that matches the side discharge channel, and a grinding space is reserved between the core assembly and the side discharge channel.

[0008] The core assembly includes an upper core fixed to the bottom end of the conical tube and connected thereto, a lower core rotatably mounted on the bottom end of the upper core and magnetically docked with the collecting box, the top end of the conical tube is fixedly connected to a rotating cylinder which is connected thereto and rotatably mounted on the top plate, the rotating cylinder passes through the upper end of the top plate and is rotatably docked with a fixedly mounted rotating tube, an ultrasonic air supply structure is externally connected to the top end of a pair of rotating tubes, a jet tube with a plurality of jet ports facing the grinding space is embedded on the upper core, and a driving mechanism for rotationally driving a pair of rotating cylinders is mounted on the top plate.

[0009] Furthermore, a collection box that is fitted with the inner wall of the cavity is installed at the lower end of the core assembly, and an abrasive flow box is fixedly installed on one side of the operation box. The outlet end of the abrasive flow box is connected to the abrasive feed cylinder through a pair of feed pipes, and the inlet end of the abrasive flow box is connected to the collection box through a pair of return pipes.

[0010] Furthermore, the outer end of the lower mold core passes through to the outside of the bottom end of the side discharge channel and is fixedly connected to a magnetic block. A magnetic groove connected to the magnetic block is opened on the inner wall of the collection box. Before polishing, one of the molds is first fitted on a fixed fixture, and a pair of core assemblies on the polishing device are just embedded in a pair of side discharge channels of the mold. At this time, a pair of collection boxes are respectively connected to the outer ends of a pair of lower mold cores, and finally the other mold is connected, and a movable fixture is used to push it inward to fit on the other mold to achieve docking limit. After installation, the core assembly is placed in the docked side discharge channel, and a pair of collection boxes are respectively located in the mold cavity.

[0011] Furthermore, a tapered cavity which is wide at the top and narrow at the bottom is provided inside the abrasive feed barrel, the inner diameter of the bottom end of the tapered cavity is consistent with the inner diameter of the outlet of the side discharge channel, the tapered tube is a conical structure which is narrow at the top and wide at the bottom, a flow space is reserved between the tapered tube and the tapered cavity, and the flow space is wide at the top and narrow at the bottom. After high-speed abrasives are introduced into the abrasive feed barrel through the feed pipe, the abrasives are introduced into the grinding space of the mold through the narrow flow space outlet from top to bottom, thereby enhancing the injection pressure of the abrasive flow and thus increasing the grinding pressure of the opposite side discharge channel.

[0012] Furthermore, the driving assembly includes a gear 1 fixedly sleeved on a pair of rotating cylinders, a gear 2 rotatably mounted on a top plate is meshedly connected between the pair of gears 1, and a driving motor for rotationally driving the gear 2 is fixedly mounted on the top plate, so that the pair of rotating cylinders respectively drive the upper mold core below the conical tube to rotate, and the upper mold core cooperates with the airflow ejected outward from the injection pipe during the rotation process, and the airflow rotates into the injection, further enhancing the grinding intensity of the discharge channel on the opposite side of the abrasive particles.

[0013] Furthermore, the ultrasonic air supply structure includes an ultrasonic generator and an ultrasonic vibration box which are respectively installed on the operation box and the top plate and connected to each other. The ultrasonic vibration box is externally connected to an air inlet pipe, and an air outlet end of the ultrasonic vibration box is connected to a pair of ventilation pipes which are respectively fixedly connected to the top of the rotating tube. The ventilation pipes are used to spray air into the upper mold core. Under the action of ultrasound, the molecular vibration frequency of the air flow is intensified to form a pulse jet, thereby enhancing the impact force of the air flow sprayed into the side discharge channel.

[0014] Furthermore, a hollow cavity connected to the conical tube is provided inside the upper mold core, and a plurality of external openings for installing the outer ports of the injection tubes are provided on the outer end wall of the upper mold core. A connecting structure which can be raised and lowered in the vertical direction and connected to the inner ends of a plurality of injection tubes is installed at the bottom of the hollow cavity, and the top of the connecting structure is connected to the bottom end of the conical tube through a telescopic tube.

[0015] Furthermore, the connecting structure includes a guide column fixed to the bottom end of the upper mold core, an air guide cylinder is movably sleeved on the upper end of the guide column, the top of the air guide cylinder is connected to the telescopic tube, a plurality of internal openings for connecting with the inner end of the injection tube are opened on the outer end wall of the air guide cylinder, a magnetic ring is embedded and installed on the bottom end wall of the air guide cylinder, and a plurality of electromagnetic rings are embedded and installed on the end wall of the guide column along the vertical direction.

[0016] Optionally, the inner and outer ends of the gas guide cylinder are respectively sleeved with elastic layers, and the elastic layers distributed inside and outside are respectively fixedly connected to the inner opening and the outer opening, and the inner ends of the multiple injection pipes are fixed on the gas guide cylinder that can be raised and lowered. By starting the electromagnetic rings at different heights on the guide column, the gas guide cylinder can be appropriately raised and lowered in the vertical direction by relying on the magnetic attraction of the electromagnetic ring to the magnetic ring, thereby changing the height of the inner port of the injection pipe, and then changing the downward inclination angle of the outer port of the injection pipe. The added elastic layer replaces the rigid mechanical connection, which is conducive to the flexible adjustment of the inclination of the injection port of the injection pipe.

[0017] Compared with the prior art, the advantages of the present invention are: This scheme is to set a core assembly that is compatible with the side discharge channel of the mold, and reserve a narrow grinding space between the core assembly and the side discharge channel. During the polishing process with the help of abrasive flow, the abrasive particles circulate back and forth through the grinding space at a certain pressure to polish the side discharge channel, thereby increasing the wall pressure of the abrasive flow on the side discharge channel. In addition, the upper core on the core assembly is set to a rotating installation type, and a plurality of injection pipes that cooperate with the acoustic air supply structure are added to the upper core. During the rotation of the upper core, the molecular vibration frequency of the airflow is intensified under the action of ultrasound to form a pulse jet, and the airflow swirls and sprays on the abrasive particles, effectively ensuring that each point on the cross section of the side discharge channel is subjected to strong abrasive flow grinding, thereby enhancing the overall polishing effect of the abrasive flow on the side discharge channel. This solution is to add a connecting structure inside the upper mold core that can move up and down and is connected to multiple ports in the injection tube, change the downward inclination angle of the outer port of the injection tube, and adjust different injection angles during the polishing process to change the impact direction and force of the abrasive particles and the side discharge channel, thereby achieving all-round contact between the abrasive particles and the side discharge channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention when it is working; Figure 2 It is a structural schematic diagram of the present invention before positioning the mold; Figure 3 It is a structural schematic diagram of a single-piece mold of the present invention; Figure 4 It is a cross-sectional view of the present invention when working; Figure 5 It is a structural schematic diagram of the present invention when the core assembly is separated from the material collection box; Figure 6 It is a cross-sectional view of the junction between the mold core assembly and the feed sleeve of the present invention; Figure 7 It is a partial enlarged view of the junction between the upper mold core and the connecting structure of the present invention; Figure 8 It is a cross-sectional schematic diagram of the present invention after the tilting direction of the injection pipe is changed by lifting the air guide cylinder; Fig. 9 It is a cross-sectional schematic diagram of the junction between the core assembly and the mold of the present invention when working.

[0019] Description of the numbers in the figure: 1. Operating table; 2. Fixture; 3. Mold; 301. Side discharge channel; 4. Operating box; 5. Top plate; 6. Abrasive feed cylinder; 7. Upper mold core; 701. Injection pipe; 8. Conical tube; 9. Lower mold core; 901. Magnetic block; 10. Collecting box; 11. Abrasive flow box; 12. Feed pipe; 13. Return pipe; 14. Rotating cylinder; 15. Bearing; 16. Rotating tube; 17. Ventilation pipe; 18. Ultrasonic vibration box; 19. Ultrasonic generator; 20. Air guide cylinder; 201. Magnetic ring; 21. Guide column; 211. Electromagnetic ring. DETAILED DESCRIPTION

[0020] The following will combine 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 the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0021] Example 1: The present invention discloses a top large combustion chamber aluminum alloy piston side row forming and polishing device, please refer to Figure 1 , Figure 2 , including an operating table 1, on which a clamp 2 for limiting the position of a mold 3 symmetrically distributed front and back is arranged, and the clamp 2 adopts an existing fixed and movable matching clamping structure, which is a prior art, please refer to Figure 3 The mold 3 is provided with side drain channels 301 respectively connected to the sides of the cavity. The side drain channels 301 are L-shaped, with the shorter end connected to the cavity and the longer end connected to the outside. The side drain channels 301 are used to discharge excess aluminum water during the piston casting process; See also Figure 2-Figure 4 An operating box 4 is installed at the upper end of the operating table 1 located at the rear side of the fixture 2. The top of the operating box 4 is fixedly connected to a top plate 5 located above the mold 3. The bottom of the top plate 5 is fixedly connected to a pair of abrasive feed cylinders 6 that are sealed and docked with the top of the side drainage channel 301 respectively. The top plate 5 seals the top of the abrasive feed cylinder 6. A conical tube 8 is sleeved inside the abrasive feed cylinder 6. The bottom of the conical tube 8 is fixedly connected to a core assembly that is compatible with the side drainage channel 301. A grinding space is reserved between the core assembly and the side drainage channel 301, and a collecting box 10 that is arranged in contact with the inner wall of the cavity is installed at the lower end of the core assembly; An abrasive flow box 11 is fixedly installed on one side of the operating box 4. The outlet end of the abrasive flow box 11 is connected to the inside of the abrasive feed cylinder 6 through a pair of feed pipes 12, and the inlet end of the abrasive flow box 11 is connected to the inside of the collection box 10 through a pair of return pipes 13.

[0022] A tapered cavity with a wide top and a narrow bottom is provided inside the abrasive feed tube 6. The inner diameter of the bottom end of the tapered cavity is consistent with the inner diameter of the outlet of the side discharge channel 301. The tapered tube 8 is a conical structure with a narrow top and a wide bottom. A flow space is reserved between the tapered tube 8 and the tapered cavity. The flow space is wide at the top and narrow at the bottom. Please refer to Fig. 9 After high-speed abrasive is introduced into the abrasive feed cylinder 6 through the feed pipe 12, the abrasive is introduced into the grinding space of the discharge channel 301 from top to bottom through the narrow flow space outlet, thereby increasing the injection pressure of the abrasive flow and thus increasing the grinding pressure of the discharge channel 301 on the opposite side.

[0023] See also Figure 4-Figure 5 The core assembly includes an upper core 7 fixed to the bottom end of the conical tube 8, and a lower core 9 magnetically connected to the collecting box 10 is rotatably installed at the bottom end of the upper core 7. The upper core 7 is connected to the inside of the conical tube 8, and the matching structure of the upper core 7 and the conical tube 8 is adapted to the shape and size of the inner cavity of the side discharge channel 301. By adding the core assembly, the size of the grinding space is reduced, and the abrasive particles enter from the top of the side discharge channel 301. When the abrasive particles pass downward through the narrow grinding space, the grinding effect of the abrasive particles on the side discharge channel 301 is enhanced.

[0024] The abrasive particles guided out from the grinding space enter the collecting box 10, which seals the lower port of the grinding space. The abrasive particles are reintroduced from the collecting box 10 into the abrasive flow box 11. In this process, the recovered abrasive particles can be filtered through a filtering structure. This process does not require manual collection, thus reducing the labor intensity of workers.

[0025] It is necessary to add that, please refer to Figure 2 , Figure 4 , Figure 5 , the outer end of the lower mold core 9 penetrates to the outside of the bottom end of the side drainage channel 301 and is fixedly connected with a magnetic suction block 901. A magnetic suction groove connected to the magnetic suction block 901 is opened on the inner wall of the collection box 10. Before polishing, firstly fit one of the molds 3 on the fixed fixture 2, and a pair of core assemblies on the polishing device are just embedded in a pair of side drainage channels 301 of the mold 3. At this time, a pair of collection boxes 10 are respectively connected to the outer ends of a pair of lower mold cores 9, and finally another mold 3 is connected, and a movable fixture 2 is used to push it inward to fit on another mold 3 to achieve docking limit. After installation, the core assembly is placed in the docked side drainage channel 301, and a pair of collection boxes 10 are respectively located in the cavity of the mold 3; An embedding cavity for embedding and installing the top plate 5 is opened at the upper end of the operation box 4. The left and right end walls of the top plate 5 are slidably installed in the embedding cavity. The top plate 5 can move forward and backward a certain distance in the horizontal direction. When the first mold 3 is placed, the top plate 5 together with a pair of core components and other structures can be moved outward to facilitate the first mold 3 to be fitted on the fixed fixture 2. After the first mold 3 is positioned, the top plate 5 is moved backward to the initial position, so that the pair of core components are positioned in the side discharge channel 301 of the mold 3, and then the second mold 3 is positioned and installed.

[0026] Embodiment 2: Based on Embodiment 1, this embodiment adds an ultrasonic air supply structure connected to the core assembly, and configures a driving mechanism to drive the upper core 7 on the core assembly to rotate, so as to enhance the effect of the abrasive flow on the side discharge channel 301 during the polishing process, as follows: See also Figure 4-Figure 5 The top end of the conical tube 8 is fixedly connected to a rotating cylinder 14 which is connected to the top plate 5 and rotatably mounted thereon. A bearing 15 is sleeved on the end wall where the rotating cylinder 14 is docked with the top plate 5. The bearing 15 is added to improve the stability of the rotating cylinder 14 driving the conical tube 8 and the upper mold core 7 to rotate. The upper end of the rotating cylinder 14 passes through the upper end of the top plate 5 and is rotatably docked with a rotating tube 16 fixedly mounted on the top plate 5. A driving mechanism for rotating a pair of rotating cylinders 14 is installed on the top plate 5. An ultrasonic air supply structure is externally connected to the top end of the pair of rotating tubes 16. A jet tube 701 with multiple jet ports facing the grinding space is embedded on the upper mold core 7. A hollow cavity connected to the conical tube 8 is provided inside the upper mold core 7. A plurality of external ports for installing the external ports of the jet tube 701 are provided on the outer end wall of the upper mold core 7. The ultrasonic air supply structure includes an ultrasonic generator 19 and an ultrasonic vibration box 18 which are respectively installed on the operation box 4 and the top plate 5 and are connected to each other. The ultrasonic vibration box 18 is externally connected to an air inlet pipe, and the air outlet of the ultrasonic vibration box 18 is connected to a pair of ventilation pipes 17 which are respectively fixedly connected to the top of the rotating tube 16. The ventilation pipes 17 are used to spray air into the upper mold core 7. Under the action of ultrasound, the air flow intensifies its molecular vibration frequency to form a pulse jet, thereby enhancing the impact force of the air flow sprayed on the side discharge channel 301. The driving assembly includes a gear 1 fixedly sleeved on a pair of rotating cylinders 14, and a gear 2 rotatably mounted on the top plate 5 is meshedly connected between the pair of gears 1. A driving motor for rotationally driving the gear 2 is fixedly mounted on the top plate 5, so that the pair of rotating cylinders 14 respectively drive the upper mold core 7 below the conical tube 8 to rotate, and the upper mold core 7 cooperates with the airflow ejected outward by the injection pipe 701 during the rotation process, and the airflow rotates in and sprays, further enhancing the grinding intensity of the abrasive particles on the side discharge channel 301. It should be added here that the upper mold core 7 acts on the longer end of the side discharge channel, and the downward rotation of the airflow can also act well on the shorter end of the side discharge channel connected to the cavity.

[0027] Embodiment 3: Based on Embodiments 1 and 2, this embodiment adds a connecting structure connected to the inner ends of the plurality of 710 inside the upper mold core 7 to appropriately adjust the airflow injection angles of the plurality of injection pipes 701, as follows: See also Figure 6-Figure 9 A hollow cavity connected to the tapered tube 8 is provided inside the upper mold core 7, and a connecting structure which can be lifted and lowered in the vertical direction and connected to the inner ends of the plurality of injection tubes 701 is installed at the bottom of the hollow cavity, and the top of the connecting structure is connected to the bottom end of the tapered tube 8 through a telescopic tube; The connecting structure includes a guide column 21 fixed to the bottom end of the upper mold core 7, an air guide cylinder 20 is movably sleeved on the upper end of the guide column 21, the top of the air guide cylinder 20 is connected to the telescopic tube, a plurality of inner openings for connecting with the inner end of the injection tube 701 are opened on the outer end wall of the air guide cylinder 20, a magnetic ring 201 is embedded and installed on the bottom end wall of the air guide cylinder 20, and a plurality of electromagnetic rings 211 are embedded and installed on the end wall of the guide column 21 along the vertical direction; The inner and outer ends of the air guide cylinder 20 are respectively sleeved with elastic layers, and the elastic layers distributed inside and outside are respectively fixedly connected to the inner and outer openings, and the inner ends of multiple injection tubes 701 are fixed on the air guide cylinder 20 that can be raised and lowered. By intermittently starting the electromagnetic rings 211 of different heights on the guide column 21, relying on the magnetic attraction of the electromagnetic rings 211 of different heights on the magnetic ring 201, the air guide cylinder 20 is appropriately raised and lowered in the vertical direction, thereby changing the height of the inner port of the injection tube 701, and then changing the downward inclination angle of the outer port of the injection tube 701. The added elastic layer replaces the rigid mechanical connection, which is conducive to the flexible adjustment of the inclination of the injection port of the injection tube 701. During the polishing process, different injection angles are adjusted to change the impact direction and force of the abrasive particles and the side discharge channel 301, so as to achieve all-round contact between the abrasive particles and the side discharge channel 301 and enhance the polishing effect.

[0028] In summary, the present invention is to arrange a core assembly having the same shape as the side drainage channel 301 on the mold 3, place the core assembly between a pair of molds 3, and reserve a narrow grinding space between the core assembly and the side drainage channel 301. During the polishing process with the aid of abrasive flow, abrasive particles circulate back and forth through the grinding space under a certain pressure to polish the side drainage channel 301, thereby increasing the wall pressure of the abrasive flow on the side drainage channel 301. The upper mold core 7 on the mold core assembly is set to a rotatable installation type, and a plurality of injection pipes 701 matched with the acoustic air supply structure are added to the upper mold core 7. During the rotation of the upper mold core 7, the airflow intensifies its molecular vibration frequency under the action of ultrasound to form a pulse jet, and the airflow swirls and sprays on the abrasive particles, thereby enhancing the overall grinding effect of the abrasive flow on the side discharge channel 301, effectively ensuring that each point in the cross section of the side discharge channel 301 is subjected to strong grinding by the abrasive flow; In addition, by adding a connecting structure that can move up and down and is connected to the inner ports of multiple injection tubes 701 inside the upper mold core 7, the downward inclination angle of the outer port of the injection tube 701 is changed. During the polishing process, different injection angles are adjusted to change the impact direction and force of the abrasive particles and the side discharge channel 301, thereby achieving all-round contact between the abrasive particles and the side discharge channel 301 and enhancing the polishing effect.

[0029] The above are only preferred specific implementation modes of the present invention; however, the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A side-discharge forming and polishing device for a top large combustion chamber aluminum alloy piston, comprising an operating table (1) and an operating box (4), wherein the operating table (1) is provided with a fixture (2) for limiting a mold (3) symmetrically distributed front and rear, and the mold (3) is provided with a pair of side-discharge flow channels (301) respectively connected to the sides of the cavity, characterized in that: The top of the operation box (4) is fixedly connected to a top plate (5), the bottom of the top plate (5) is fixedly connected to a pair of abrasive feed barrels (6) respectively connected to the top of the side discharge channel (301), a conical tube (8) is sleeved inside the abrasive feed barrel (6) and rotated on the bottom of the top plate (5), a core assembly adapted to the side discharge channel (301) is fixed to the bottom of the conical tube (8), and a grinding space is reserved between the core assembly and the side discharge channel (301).

2. The mold core assembly comprises an upper mold core (7) fixed to the bottom end of the conical tube (8) and connected thereto, a lower mold core (9) rotatably mounted on the bottom end of the upper mold core (7) and magnetically docked with the collecting box (10), the top end of the conical tube (8) is fixedly connected to a rotating cylinder (14) connected thereto and rotatably mounted on the top plate (5), the rotating cylinder (14) passes through the top end of the top plate (5) and is rotatably docked with a fixedly mounted rotating tube (16), a pair of rotating tubes (16) are externally connected to the top ends of the external ...

3. The top large combustion chamber aluminum alloy piston side row forming and polishing device according to claim 1 is characterized by: A collection box (10) is installed at the lower end of the core assembly and is arranged to fit the inner wall of the cavity. An abrasive flow box (11) is fixedly installed on one side of the operation box (4). The outlet end of the abrasive flow box (11) is connected to the abrasive feed cylinder (6) through a pair of feed pipes (12), and the inlet end of the abrasive flow box (11) is connected to the collection box (10) through a pair of return pipes (13).

4. The top large combustion chamber aluminum alloy piston side row forming and polishing device according to claim 2 is characterized by: The outer end of the lower mold core (9) penetrates to the outside of the bottom end of the side discharge channel (301) and is fixedly connected to a magnetic attraction block (901), and a magnetic attraction groove connected to the magnetic attraction block (901) is provided on the inner wall of the collection box (10).

5. The top large combustion chamber aluminum alloy piston side row forming and polishing device according to claim 1 is characterized by: The abrasive feed cylinder (6) has a tapered cavity that is wide at the top and narrow at the bottom, the inner diameter of the bottom end of the tapered cavity is consistent with the inner diameter of the outlet of the side discharge channel (301), the tapered tube (8) is a conical structure that is narrow at the top and wide at the bottom, and a flow space is reserved between the tapered tube (8) and the tapered cavity.

6. The top large combustion chamber aluminum alloy piston side row forming and polishing device according to claim 1 is characterized by: The driving assembly comprises a gear 1 fixedly sleeved on a pair of rotating cylinders (14), a gear 2 rotatably mounted on a top plate (5) is meshingly connected between the pair of gears 1, and a driving motor for rotationally driving the gear 2 is fixedly mounted on the top plate (5).

7. The top large combustion chamber aluminum alloy piston side row forming and polishing device according to claim 1 is characterized by: The ultrasonic air supply structure comprises an ultrasonic generator (19) and an ultrasonic vibration box (18) which are respectively mounted on the operation box (4) and the top plate (5) and are connected to each other. The ultrasonic vibration box (18) is externally connected to an air inlet pipe, and the air outlet of the ultrasonic vibration box (18) is connected to a pair of ventilation pipes (17) which are respectively fixedly connected to the top end of the rotating tube (16).

8. The top large combustion chamber aluminum alloy piston side row forming and polishing device according to claim 1 is characterized by: The upper mold core (7) is provided with a hollow cavity in communication with the conical tube (8), and the outer end wall of the upper mold core (7) is provided with a plurality of external openings for installing the outer ports of the injection tubes (701). A connecting structure which can be raised and lowered in a vertical direction and is connected to the inner ends of the plurality of injection tubes (701) is installed at the bottom of the hollow cavity, and the top end of the connecting structure is connected to the bottom end of the conical tube (8) via a telescopic tube.

9. The top large combustion chamber aluminum alloy piston side row forming and polishing device according to claim 7, characterized in that: The connecting structure comprises a guide column (21) fixed to the bottom end of the upper mold core (7), the upper end of the guide column (21) being movably sleeved with an air guide cylinder (20), the top end of the air guide cylinder (20) being connected to a telescopic tube, a plurality of inner openings for connecting with the inner end of an injection tube (701) being provided on the outer end wall of the air guide cylinder (20), a magnetic ring (201) being embedded in the bottom end wall of the air guide cylinder (20), and a plurality of electromagnetic rings (211) being embedded in the end wall of the guide column (21) along the vertical direction.

10. The top large combustion chamber aluminum alloy piston side row forming and polishing device according to claim 8, characterized in that: The inner and outer ends of the air guide cylinder (20) are respectively sleeved with elastic layers, and the elastic layers distributed inside and outside are respectively fixedly connected to the inner opening and the outer opening.

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