A casting system for preparing ductile iron brake disc

Abstract

The present invention discloses a casting system for preparing ductile iron brake discs, which belongs to the field of casting technology, and includes a casting platform, a casting molding seat is arranged on the casting platform, the casting molding seat is connected to the preparation casting platform through a centrifugal rotating component, a plurality of modular casting bodies are evenly distributed on the upper surface of the preparation casting platform, a temperature control device is arranged on the modular casting body, and a regulating opening and closing motor is arranged inside the preparation casting platform, and the regulating opening and closing motor is connected to the modular casting body through a joint control component. The present invention performs modular casting by arranging the traditional central casting into a multi-module modular casting body, and reduces the fluidity of the ductile iron casting liquid during the casting process through the action of centrifugal force, so as to avoid the situation that the graphite that is not easy to flow is gathered around due to the large fluidity, and the graphite gradually gathers to the middle under the action of the small fluidity, which can ensure the uniformity of graphite distribution of the ductile iron brake disc casting after casting, and ensure the quality of the ductile iron brake disc.

Description

Technical Field

[0001] The invention relates to the technical field of casting, and in particular to a casting system for preparing a ductile iron brake disc. Background Art

[0002] The brake disc is the friction component of the disc brake. In addition to having the strength and rigidity required as a component, it should also have the highest possible and stable friction coefficient, as well as appropriate wear resistance, heat resistance, heat dissipation and heat capacity.

[0003] Ductile iron is widely used in machinery, automobile and other industries due to its excellent performance. With the development of technology, more and more high-grade ductile iron is used in automotive cast iron parts, while the performance of ductile iron obtained by traditional casting methods is increasingly difficult to meet the requirements. Ductile iron brake discs for heavy-duty vehicles often use ductile iron as a material. Because ductile iron is mainly in the cast state in applications, its mechanical properties cannot meet higher use requirements, which limits its application to a certain extent. In the production process of ductile iron castings, casting defects such as subcutaneous pores, shrinkage cavities, and uneven graphite distribution are prone to occur, which seriously affect the quality of castings and limit the further development of ductile iron. At present, in the casting process of ductile iron brake disc castings, the traditional method is to cast by center casting, which mainly fills the sand core mold by the fluidity of cast iron. Due to the poor fluidity of graphite inside ductile iron, the center casting method will cause a large amount of graphite in the center, resulting in uneven graphite distribution in the casting, which seriously limits the production quality of the brake disc. Based on this, a casting system for preparing ductile iron brake discs is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that in the prior art, casting is performed by center casting, and the fluidity of cast iron is mainly used to fill the sand core mold by itself. Since the graphite fluidity inside ductile iron is poor, the center casting method will cause a high graphite content in the center, resulting in uneven graphite distribution in the casting, which seriously limits the production quality of the brake disc. A casting system for preparing ductile iron brake discs is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A casting system for preparing a ductile iron brake disc, comprising a casting platform, a casting molding seat is arranged on the casting platform, the casting molding seat is connected to a preparation casting platform through a centrifugal rotating component, a plurality of modular casting bodies are evenly distributed on the upper surface of the preparation casting platform, a temperature control device 27 is arranged on the modular casting body, a regulating opening and closing motor is arranged inside the preparation casting platform, and the regulating opening and closing motor is connected to the plurality of modular casting bodies through a joint control component;

[0007] A core adapting mold groove is provided in the modular casting body, a core docking nozzle is provided on the inner wall of the core adapting mold groove, and a casting docking port connected to the casting port docking nozzle is provided on the top of the modular casting body.

[0008] A lifting control frame is arranged on one side of the casting platform, a lifting hydraulic cylinder is arranged on the lifting control frame, an output end of the lifting hydraulic cylinder is connected to a lifting mounting plate, a bottom of the lifting mounting plate is connected to a casting liquid convergence groove ring through a telescopic traction member, an airtight pressure member matched with the casting liquid convergence groove ring is arranged at the bottom of the lifting mounting plate, a plurality of casting docking members matched with the casting docking port are arranged at the bottom of the casting liquid convergence groove ring, and a premixed flow component is arranged on the casting docking member.

[0009] Preferably, the centrifugal rotating assembly includes a mounting groove opened on the casting molding seat, a rotating motor is arranged on the casting molding seat, the output end of the rotating motor extends downward and is fixedly connected to a rotating gear, and an annular tooth groove meshing with the rotating gear is opened on the inner side wall of the preparation casting table.

[0010] Preferably, the linkage control component includes a transmission cavity opened in the preparation casting table, the output end of the regulating opening and closing motor is fixedly connected with a vertical regulating screw, the vertical regulating screw is connected with a regulating disk through a screw nut, and a plurality of linkage regulating rods are rotatably arranged on the outer side wall of the regulating disk.

[0011] Preferably, a plurality of limit T-shaped openings are provided on the top of the transmission cavity, and an "inverted U"-shaped limit slider located in the limit T-shaped opening is fixedly arranged at the bottom of the modular casting body, and the "inverted U"-shaped limit slider is rotatably connected to the other end of the linkage control rod.

[0012] Preferably, the telescopic traction member includes a T-shaped column fixedly arranged at the bottom of the lifting mounting plate, the outer side wall of the casting liquid convergence groove ring is rotatably provided with a fixed outer ring body, the outer side wall of the fixed outer ring body is fixedly connected with a lifting seat, the T-shaped column is slidably connected to the lifting seat, and the lifting seat is connected to the bottom of the lifting mounting plate via a traction spring sleeved on the T-shaped column.

[0013] Preferably, the airtight pressure member comprises an air pressure arc member adapted to the casting liquid convergence groove ring, and the air pressure arc member is fixedly arranged at the bottom of the lifting mounting plate.

[0014] Preferably, the casting docking piece includes a docking tube rotatably arranged at the bottom of the casting liquid convergence groove ring, the docking tube is connected to the top of the casting liquid convergence groove ring, and the end of the docking tube is arranged in a conical shape.

[0015] Preferably, the premixed flow component includes a mixing blade arranged on the inner wall of the butt tube, the outer wall of the butt tube is fixedly connected with a self-rotating gear, the fixed outer ring body is connected with a fixed inner gear ring through an L-shaped rod, and the fixed inner gear ring is meshed with the self-rotating gear.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention is designed to address the poor fluidity of graphite in ductile iron. By arranging mixing blades on the inner wall of a self-rotating butt-joint pipe, the flowing ductile iron casting liquid passing through is stirred and mixed, thereby achieving uniform mixing of the graphite in the ductile iron casting liquid and avoiding the occurrence of uneven graphite distribution caused by greater fluidity at the direct current.

[0018] 2. The present invention performs modular casting by configuring the traditional central casting into a multi-module modular casting body, and reduces the fluidity of the ductile iron casting liquid during the casting process through the action of centrifugal force. Under the action of lower fluidity, the graphite gradually converges to the middle, thereby ensuring the uniformity of graphite distribution of the ductile iron brake disc casting after casting and ensuring the quality of the ductile iron brake disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of a casting system for preparing a ductile iron brake disc proposed by the present invention;

[0020] Figure 2 A schematic diagram of the partial structural assembly of a casting system for preparing a ductile iron brake disc proposed by the present invention;

[0021] Figure 3 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 4 A schematic diagram of the position relationship of a telescopic traction member in a casting system for preparing a ductile iron brake disc proposed by the present invention;

[0023] Figure 5 A schematic diagram of the assembly structure of a telescopic traction member in a casting system for preparing a ductile iron brake disc proposed by the present invention;

[0024] Figure 6 A schematic diagram of the structure of a joint control component in a casting system for preparing a ductile iron brake disc proposed by the present invention;

[0025] Figure 7 A schematic cross-sectional structure diagram of a modular casting body in a casting system for preparing a ductile iron brake disc proposed by the present invention;

[0026] Figure 8The present invention provides a structural schematic diagram of a casting butt joint in a casting system for preparing a ductile iron brake disc.

[0027] In the figure: 1. Casting molding seat; 2. Preparation of casting table; 3. Modular casting body; 4. Adjustment and opening motor; 5. Casting core adapter mold groove; 6. Casting core docking nozzle; 7. Casting docking port; 8. Lifting hydraulic cylinder; 9. Lifting mounting plate; 10. Casting liquid convergence groove ring; 11. Rotating motor; 12. Rotating gear; 13. Annular tooth groove; 14. Vertical adjustment screw; 15. Linkage adjustment rod; 16. Adjustment plate; 17. Limit T-shaped mouth; 18. "Inverted U" type limit slider; 19. T-shaped column; 20. Fixed outer ring body; 21. Lifting seat; 22. Pneumatic arc member; 23. Butt pipe; 24. Mixed flow blade; 25. Rotating gear; 26. Fixed inner gear ring; 27. Temperature control device. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Example, see Figures 1 to 8A casting system for preparing a ductile iron brake disc comprises a casting platform, a casting molding seat 1 is arranged on the casting platform, the casting molding seat 1 is connected to a preparation casting platform 2 through a centrifugal rotating assembly, further, the centrifugal rotating assembly comprises a mounting groove provided on the casting molding seat 1, a rotating motor 11 is provided on the casting molding seat 1, the output end of the rotating motor 11 extends downward and is fixedly connected to a rotating gear 12, an annular tooth groove 13 meshing with the rotating gear 12 is provided on the inner side wall of the preparation casting platform 2, the preparation casting platform 2 is rotatably installed in the mounting groove, the rotating gear 12 is driven by the rotating motor 11, thereby driving the preparation casting platform meshed with the annular tooth groove 13 to rotate, and the preparation A plurality of modular casting bodies 3 are evenly distributed on the upper surface of the casting table 2, and a temperature control device 27 is arranged on the modular casting body 3. The temperature control device 27 is arranged on the modular casting body 3, and is a resistance wire heating structure, and is controlled and powered by an electric control component. It is a prior art and will not be described in detail here. The setting of the temperature control device 27 can meet the heating of the sand core mold that is adapted to the core matching groove 5, so as to ensure the consistency of preheating and temperature during the casting process, improve the casting molding degree and casting quality, and a regulating opening and closing motor 4 is arranged inside the casting table 2. The regulating opening and closing motor 4 is a prior art and will not be described here. The regulating opening and closing motor 4 is connected to the plurality of modular casting bodies 3 through a joint control component;

[0032] Furthermore, the joint control component includes a transmission cavity (not shown in the figure) opened in the preparation casting table 2, and the output end of the regulating opening and closing motor 4 is fixedly connected to a vertical regulating screw 14, and the vertical regulating screw 14 is connected to a regulating disk 16 through a screw nut. A plurality of linkage regulating rods 15 are rotatably arranged on the outer wall of the regulating disk 16, and a plurality of limit T-shaped openings 17 are opened on the top of the transmission cavity. An "inverted U"-shaped limit slider 18 located in the limit T-shaped opening 17 is fixedly arranged at the bottom of the modular casting body 3, and the "inverted U"-shaped limit slider 18 is rotatably connected to the other end of the linkage regulating rod 15.

[0033] It should be noted that the "inverted U"-shaped limit slider 18 is slidably connected to the limit T-shaped opening 17, and the two are locked with each other. The "inverted U"-shaped limit slider 18 can only achieve horizontal sliding, and the above-mentioned rotational connections are all matching connections between the shaft and the hole, which are conventional design methods and will not be elaborated here.

[0034] A core adapting groove 5 is provided in the modular casting body 3 , a core docking nozzle 6 is provided on the inner wall of the core adapting groove 5 , and a casting docking port 7 connected to the casting port docking nozzle is provided on the top of the modular casting body 3 .

[0035] It should be noted that the casting port of the sand core mold in this solution is set on the four sides, not in the middle. The size of the casting port of the sand core mold is consistent with the size of the core docking nozzle 6 on the inner wall of the core adapter groove 5, meeting the docking requirements.

[0036] A lifting control frame is provided on one side of the casting platform, and a lifting hydraulic cylinder 8 is provided on the lifting control frame. The output end of the lifting hydraulic cylinder 8 is connected to a lifting mounting plate 9, and the bottom of the lifting mounting plate 9 is connected to a casting liquid convergence groove ring 10 through a telescopic traction member, wherein the casting liquid convergence groove ring 10 is not the entire annular groove, and is divided into multiple separate annular grooves by multiple partitions.

[0037] Furthermore, the telescopic traction member includes a T-shaped column 19 fixedly arranged at the bottom of the lifting mounting plate 9, a fixed outer ring body 20 is rotatably arranged on the outer wall of the casting liquid convergence groove ring 10, and a lifting seat 21 is fixedly connected to the outer wall of the fixed outer ring body 20, the T-shaped column 19 is slidably connected to the lifting seat 21, and the lifting seat 21 is connected to the bottom of the lifting mounting plate 9 through a sleeve traction spring sleeved on the T-shaped column 19.

[0038] The advantage of adopting the above structure is that the setting of the telescopic traction member can make the lifting installation plate 9 continue to move downward when the casting docking member at the bottom of the casting liquid convergence groove ring 10 is docked with the casting docking port 7 and cannot move, thereby achieving the effect of driving the airtight pressure member to move downward.

[0039] An airtight pressure piece adapted to the casting liquid convergence groove ring 10 is arranged at the bottom of the lifting installation plate 9. Furthermore, the airtight pressure piece includes an air pressure arc piece 22 adapted to the casting liquid convergence groove ring 10, and the air pressure arc piece 22 is fixedly arranged at the bottom of the lifting installation plate 9.

[0040] A plurality of casting docking parts matched with the casting docking port 7 are arranged at the bottom of the casting liquid convergence groove ring 10, and a premixed flow component is arranged on the casting docking part. The casting docking part includes a docking pipe 23 rotatably arranged at the bottom of the casting liquid convergence groove ring 10, and the docking pipe 23 is connected to the top of the casting liquid convergence groove ring 10, and the end of the docking pipe 23 is arranged in a conical shape.

[0041] Furthermore, the premixed flow component includes a mixing blade 24 arranged on the inner wall of the butt tube 23, the outer wall of the butt tube 23 is fixedly connected with a self-rotating gear 25, the fixed outer ring body 20 is connected with a fixed inner gear ring 26 through an L-shaped rod, and the fixed inner gear ring 26 is meshed with the self-rotating gear 25.

[0042] It is worth noting that since the butt joint 23 is vertically arranged, the flow rate of the ductile iron casting liquid at the butt joint 23 is higher than that at other positions. In order to avoid uneven distribution of graphite due to the higher fluidity here, a premixed flow component is provided to stir it to avoid this situation and ensure the quality of the ductile iron brake disc.

[0043] When casting the brake disc, the present invention takes out the sand core mold that matches the core matching mold groove 5, controls the multiple modular casting bodies 3 to move away from each other by adjusting the opening and closing motor 4, puts the sand core mold in the middle after moving away, and then controls the multiple modular casting bodies 3 to close by adjusting the opening and closing motor 4. The core docking nozzle 6 arranged on the inner wall of the core matching mold groove 5 will dock with the casting port on the sand core mold during the closing process, completing the casting pretreatment work;

[0044] The lifting mounting plate 9 is controlled to move downward by the lifting hydraulic cylinder 8, so that the casting docking piece arranged at the bottom of the casting liquid convergence groove ring 10 is accurately docked with the casting docking port 7 on the modular casting body 3, and the ductile iron casting liquid is quantitatively transported to the corresponding casting liquid convergence groove ring 10. At this time, the ductile iron casting liquid will flow into the casting docking port 7 during the flow process, and finally gradually flow into the sand core mold through the core docking nozzle 6;

[0045] During the step-by-step casting process, the rotating motor 11 drives the rotating gear 12, thereby driving the preparation casting table connected by the annular tooth groove 13 to rotate;

[0046] At this time, the flowing ductile iron casting liquid will flow through the docking tube 23. The docking tube 23 that rotates with the preparation casting table 2 will make the self-rotating gear arranged thereon interact with the fixed inner gear ring 26 during the rotation process, so as to drive the docking tube 23 to rotate through the self-rotating gear 25. The mixing blades 24 arranged on the inner wall of the docking tube 23 will stir and mix the flowing ductile iron casting liquid passing through, so as to achieve uniform mixing of the graphite in the ductile iron casting liquid and avoid the occurrence of poor flow.

[0047] During the centrifugal rotation, the ductile iron casting liquid flowing into the sand core mold will be slowed down by the centrifugal force. In this process, the liquid cast in the modules will gradually occupy the large area of ​​the outer disc first, and finally gather together, so as to ensure the synchronization of casting and avoid the situation where the graphite that is not easy to flow gathers around due to the large fluidity. Under the action of small fluidity, the graphite gradually gathers in the middle, which can ensure the uniformity of graphite distribution of the ductile iron brake disc casting after casting and ensure the quality of the ductile iron brake disc.

[0048] The continuously moving lifting mounting plate 9 will squeeze the air pressure arc member 22 downward to the casting liquid convergence groove ring 10 during the downward movement. By design, the ductile iron casting liquid in the casting liquid convergence groove ring 10 just flows out at this time. At this time, the air pressure arc member 22 squeezes the casting liquid convergence groove ring 10 downward, and applies pressure to the core docking nozzle 6, thereby realizing that the ductile iron casting liquid in the casting pipeline is completely injected into the core docking nozzle 6, thereby avoiding the occurrence of air bubbles and hollowing, and ensuring the quality of the cast ductile iron brake disc.

[0049] The above description is only a preferred specific implementation manner 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 scheme and inventive concept 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 casting system for preparing a ductile iron brake disc, comprising a casting platform, characterized in that: A casting seat (1) is arranged on the casting platform, the casting seat (1) is connected to a preparation casting platform (2) via a centrifugal rotating component, a plurality of modular casting bodies (3) are evenly distributed on the upper surface of the preparation casting platform (2), a temperature control device (27) is arranged on the modular casting body (3), a regulating opening and closing motor (4) is arranged inside the preparation casting platform (2), and the regulating opening and closing motor (4) is connected to the plurality of modular casting bodies (3) via a joint control component; A core adapting mold groove (5) is provided in the modular casting body (3), a core docking nozzle (6) is provided on the inner wall of the core adapting mold groove (5), and a casting docking port (7) connected to the casting port docking nozzle is provided on the top of the modular casting body (3); A lifting control frame is provided on one side of the casting platform, a lifting hydraulic cylinder (8) is provided on the lifting control frame, an output end of the lifting hydraulic cylinder (8) is connected to a lifting mounting plate (9), a bottom of the lifting mounting plate (9) is connected to a casting liquid convergence groove ring (10) via a telescopic traction member, an airtight pressure member matched with the casting liquid convergence groove ring (10) is provided at the bottom of the lifting mounting plate (9), a plurality of casting docking members matched with the casting docking port (7) are provided at the bottom of the casting liquid convergence groove ring (10), and a premixed flow component is provided on the casting docking member.

2. A casting system for preparing a ductile iron brake disc according to claim 1, characterized in that: The centrifugal rotating assembly comprises a mounting groove formed on a casting seat (1), a rotating motor (11) is arranged on the casting seat (1), an output end of the rotating motor (11) extends downward and is fixedly connected to a rotating gear (12), and an annular tooth groove (13) meshing with the rotating gear (12) is formed on the inner side wall of the preparation casting table (2).

3. A casting system for preparing a ductile iron brake disc according to claim 1, characterized in that: The joint control component comprises a transmission cavity opened in the preparation casting table (2); the output end of the regulating opening and closing motor (4) is fixedly connected to a vertical regulating lead screw (14); the vertical regulating lead screw (14) is connected to a regulating disk (16) via a lead screw nut; and a plurality of linkage regulating rods (15) are rotatably arranged on the outer side wall of the regulating disk (16).

4. A casting system for preparing a ductile iron brake disc according to claim 3, characterized in that: A plurality of limit T-shaped openings (17) are provided at the top of the transmission cavity, and an "inverted U"-shaped limit slider (18) located in the limit T-shaped opening (17) is fixedly provided at the bottom of the modular casting body (3), and the "inverted U"-shaped limit slider (18) is rotatably connected to the other end of the linkage regulating rod (15).

5. A casting system for preparing ductile iron brake discs according to claim 1, characterized in that: The telescopic traction member comprises a T-shaped column (19) fixedly arranged at the bottom of the lifting installation plate (9); a fixed outer ring body (20) is rotatably arranged on the outer side wall of the casting liquid convergence groove ring (10); a lifting seat (21) is fixedly connected to the outer side wall of the fixed outer ring body (20); the T-shaped column (19) is slidably connected to the lifting seat (21); and the lifting seat (21) is connected to the bottom of the lifting installation plate (9) via a sleeve traction spring sleeved on the T-shaped column (19).

6. A casting system for preparing ductile iron brake discs according to claim 5, characterized in that: The airtight pressure-applying member comprises an air pressure arc member (22) adapted to the casting liquid convergence groove ring (10), and the air pressure arc member (22) is fixedly arranged at the bottom of the lifting installation plate (9).

7. A casting system for preparing a ductile iron brake disc according to claim 6, characterized in that: The casting butt joint comprises a butt joint pipe (23) rotatably arranged at the bottom of the casting liquid convergence groove ring (10), the butt joint pipe (23) is connected to the top of the casting liquid convergence groove ring (10), and the end of the butt joint pipe (23) is arranged in a conical shape.

8. A casting system for preparing ductile iron brake discs according to claim 7, characterized in that: The premixing flow component comprises a mixing blade (24) arranged on the inner wall of a butt-joint pipe (23); the outer wall of the butt-joint pipe (23) is fixedly connected to a self-rotating gear (25); the fixed outer ring body (20) is connected to a fixed inner gear ring (26) via an L-shaped rod; the fixed inner gear ring (26) is meshingly connected to the self-rotating gear (25).

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