A foundry core print device

Abstract

The utility model provides a kind of foundry air passage positioning core mould device, belong to mechanical processing field.The utility model a kind of foundry air passage positioning core mould device includes first core mould, second core mould, first spring, second spring, bush and plug, the first spring and the second spring are equipped on the plug, the first core mould and the second core mould coaxial assembly and are all T type structure, the second core mould center inside is equipped with stepped hole, the first core mould is coaxially nested in the second core mould, the bush is wrapped in the second core mould outside, the bush is detachably connected with the plug.The utility model can realize foundry air passage accurate positioning, effectively improve exhaust manifold machining precision, reduce positioning jam risk.

Description

Technical Field

[0001] This utility model belongs to the field of machining, and specifically relates to a casting air passage positioning core device. Background Technology

[0002] In the field of machinery manufacturing, especially machining, air passage positioning is crucial for ensuring the quality and performance of castings. Existing casting air passage positioning structures have many drawbacks, significantly limiting production efficiency and the improvement of exhaust manifold quality. Complex manufacturing process: Traditional positioning structures are intricately designed, involving multiple complex processes. From the fine machining of parts to the precise assembly of the whole, each step requires high-precision operation, resulting in high manufacturing costs, long production cycles, and a heavy production burden on enterprises. Prone to jamming: In actual use, factors such as vibration, temperature changes, and part wear can reduce the precision of the fit between components within the positioning structure, frequently leading to jamming. This not only affects the timeliness and accuracy of positioning but may also cause positioning failure, resulting in deviations in the casting air passage position, leading to exhaust manifold scrap and increased production costs. These problems urgently need to be solved to achieve precise positioning of casting air passages, effectively improve the machining accuracy of exhaust manifolds, and reduce the risk of positioning jamming. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to achieve precise positioning of the air passage of the casting, effectively improve the processing accuracy of the exhaust manifold, and reduce the risk of positioning jamming. In view of the shortcomings of the existing technology, a casting air passage positioning core device is provided.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: This utility model provides a casting air passage positioning core device, including a first core, a second core, a first spring, a second spring, a bushing, and a plug. The first spring and the second spring are disposed on the plug. The first core and the second core are coaxially assembled and both have a T-shaped structure. The second core has a stepped hole in its center. The first core is coaxially nested in the second core. The bushing is wrapped around the outside of the second core. The bushing and the plug are detachably connected.

[0005] Optionally, the second core tire has a T-shaped structure, with an upper protrusion or block structure that connects to the first core tire, and a lower columnar structure.

[0006] Optionally, the top of the first spring abuts against the bottom of the first core, the diameter of the first spring is less than or equal to the inner diameter of the stepped hole, and the first spring drives the first core to move up and down. The top of the second spring abuts against the bottom of the second core, the diameter of the second spring is equal to the outer diameter of the columnar structure of the second core, and the second spring drives the second core to move up and down. The first spring and the second spring are independently arranged in parallel and vertically on the plug.

[0007] Optionally, the bushing is a cylindrical structure with a flange, fitted onto the outside of the second core. The bushing and the second core are provided with bolt holes, and the second core is oriented by inserting bolts into the bolt holes. The flange is provided with mounting holes, and the bushing is fixed to the base plate by inserting bolts into the mounting holes.

[0008] Optionally, the plug is disc-shaped with a spring receiving groove in the center. The lower end of the bushing is detachably connected to the edge of the plug by multiple bolts, and the multiple bolt holes are evenly distributed along the circumference of the plug.

[0009] Optionally, the stepped hole is coaxial with the outer circle of the second core.

[0010] Optionally, after the first and second core tires are assembled, four core tire conical surfaces are machined at once by a machining center, and the contact parts of the conical surfaces and the inner cavity of the exhaust manifold are on the same plane.

[0011] Compared to existing technologies, the beneficial effects of this utility model are as follows: A casting air passage positioning core device is composed of a first core, a second core, a first spring, a second spring, a bushing, and a plug. The first core and the second core are coaxially assembled and both have a T-shaped structure. The cross-sectional mechanical properties of the T-shaped structure are superior. Compared to the U-shaped structure, it reduces bending or torsional deformation caused by stress during positioning, ensuring the core remains stable during long-term use. The coaxial design of the first and second cores facilitates machining through rotary turning, vertical milling, and precision grinding processes, avoiding the machining difficulties of complex curved surfaces and reducing manufacturing precision requirements. The second core tire has a stepped hole inside its center, and the first core tire is coaxially nested within the second core tire to ensure that the movement trajectories of the first and second core tires are on the same axis, avoiding positioning deviations caused by eccentricity and improving positioning accuracy in the X and Y directions; the bushing is wrapped around the outside of the second core tire, and the bushing and the plug are detachably connected. The bushing and the plug are connected by bolts. The detachable bolt connection design allows the bushing, plug, and core tire assembly to be quickly disassembled, facilitating the replacement of worn springs or core tire components and reducing maintenance costs and time. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings.

[0013] Figure 1 : A schematic diagram of the structure of a casting air passage positioning core device in an embodiment of this utility model; Figure 2 : A schematic diagram of the structure of the first core of a casting air passage positioning core device in an embodiment of this utility model; Figure 3 : A schematic diagram of the structure of the second core of a casting air passage positioning core device in an embodiment of this utility model; Figure 4 : A schematic diagram of the structure of a plug for a casting air passage positioning core device in an embodiment of this utility model; Figure 5 : A schematic diagram of the structure of a casting air passage positioning core device bushing in an embodiment of this utility model; Among them, 1. First core; 2. Second core; 3. Bushing; 4. End cap; 5. First spring; 6. Step hole; 7. Bolt hole; 8. Conical surface; 9. Mounting hole; 10. Second spring; 11. Flange; 12. Spring receiving groove. Detailed Implementation

[0014] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.

[0015] It should be noted that the Z-axis in the attached figures represents the vertical direction, i.e., the up-down position, with the positive direction of the Z-axis representing upward and the negative direction representing downward; the Y-axis in the attached figures represents the horizontal direction and is designated as the front-back position, with the positive direction of the Y-axis representing the front and the negative direction representing the back; the X-axis in the attached figures represents the left-right position, with the positive direction of the X-axis representing the right and the negative direction representing the left. It should also be noted that the aforementioned representations of the Z, Y, and X axes are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0017] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0018] In the field of machining technology, existing casting air duct positioning core structures have the following problems: First, traditional positioning structures have complex manufacturing processes, requiring multiple steps of processing, resulting in low assembly accuracy and low efficiency; second, the U-shaped core structure lacks rigidity and is prone to deformation, causing positioning deviations; third, the core movement relies on a single spring drive, which is prone to jamming, affecting the flexibility of vertical movement and making it difficult to adapt to fluctuations in internal cavity dimensions; fourth, the machining surfaces need to be processed in stages, resulting in inconsistent flatness of the contact surfaces, which exacerbates positioning errors. These problems directly affect the machining accuracy and yield of castings.

[0019] To solve the above-mentioned technical problems, an embodiment of the present invention provides a casting air passage positioning core device including a first core (1), a second core (2), a first spring (5), a second spring (10), a bushing (3) and a plug (4). The first spring (5) and the second spring (10) are disposed on the plug (4). The first core (1) and the second core (2) are coaxially assembled and both are T-shaped structures. The second core (2) has a stepped hole (6) in the center. The first core (1) is coaxially nested in the second core (2). The bushing (3) is wrapped around the outside of the second core (2). The bushing (3) and the plug (4) are detachably connected.

[0020] In this embodiment, as Figures 1 to 4As shown, in order to improve the positioning accuracy and enhance the structural strength of the casting air passage positioning core device, a first core (1), a second core (2), a first spring (5), a second spring (10), a bushing (3), and a plug (4) are assembled to form a casting air passage positioning core device. The first core (1) and the second core (2) are coaxially assembled and both are T-shaped structures. The cross-sectional mechanical properties of the T-shaped structure are better. Compared with the U-shaped structure, it reduces the bending or torsional deformation caused by the force during positioning, ensuring that the core remains stable during long-term use. The coaxial design of the first core (1) and the second core (2) is convenient for processing by rotary turning, vertical milling and fine grinding processes, avoiding the processing of complex curved surfaces. The difficulty is reduced, the manufacturing precision requirements and process costs are reduced; the second core (2) has a stepped hole (6) inside the center, and the first core (1) is coaxially nested in the second core (2), ensuring that the movement trajectory of the first core (1) and the second core (2) is on the same axis, avoiding positioning deviation caused by eccentricity, and improving the positioning accuracy in the X and Y directions; the bushing (3) is wrapped around the outside of the second core (2), and the bushing (3) and the plug (4) are detachably connected. The bushing (3) and the plug (4) can be connected by bolts. The detachable bolt connection design allows the bushing (3), the plug (4) and the core assembly to be quickly disassembled, which is convenient for replacing worn springs or core components, reducing maintenance costs and time.

[0021] Optionally, the second core tire (2) has a T-shaped structure, with the upper part protruding or block-shaped structure connecting with the first core tire (1), and the lower part having a columnar structure.

[0022] This optional embodiment, such as Figure 3 As shown, in order to improve the positioning accuracy of the casting air duct positioning core device, the upper protruding structure forms a mechanical limit with the first core (1) to ensure that the contact point of the conical surface (8) is fixed after the two are assembled; the lower columnar structure cooperates with the inner wall of the bushing (3) to provide a guiding effect, so that the second core (2) does not wobble radially when it moves up and down, and avoids jamming. The mating surface of the protruding structure and the first core (1) is precision machined to ensure the coaxiality of the two, laying the foundation for the subsequent one-time machining of the conical surface (8).

[0023] Optionally, the top of the first spring (5) abuts against the bottom of the first core (1), the diameter of the first spring (5) is less than or equal to the inner diameter of the stepped hole (6), the first spring (5) drives the first core (1) to move up and down, the top of the second spring (10) abuts against the bottom of the second core (2), the diameter of the second spring (10) is equal to the outer diameter of the columnar structure of the second core (2), the second spring (10) drives the second core (2) to move up and down, and the first spring (5) and the second spring (10) are independently and vertically arranged on the plug (4).

[0024] In this optional embodiment, such as Figure 4As shown, to ensure that the first core (1) and the second core (2) of the casting air duct positioning core device are driven independently, the top of the first spring (5) abuts against the bottom of the first core (1). The diameter of the first spring (5) is less than or equal to the inner diameter of the stepped hole (6), ensuring that the spring can be completely accommodated in the stepped hole (6) and leaving a certain clearance to avoid the spring from getting stuck due to excessive friction. At the same time, the bottom of the stepped hole (6) supports the spring and provides stable elastic force. The top of the second spring (10) abuts against the bottom of the second core (2). The diameter of the second spring (10) is equal to the outer diameter of the columnar structure of the second core (2). The outer side of the spring is tightly fitted with the columnar structure to prevent the spring from radially shifting during compression / extension, ensuring that the second core (2) moves linearly along the axial direction and improving motion stability. The first spring (5) drives the first core tire (1) to move up and down, and the second spring (10) drives the second core tire (2) to move up and down. The first spring (5) and the second spring (10) drive the corresponding core tires to move up and down respectively, so that the two can independently respond to the changes in the X and Y dimensions of the exhaust manifold cavity, realize independent adjustment in each direction in the four-point positioning, and avoid the positioning error caused by linkage in the traditional structure. The first spring (5) and the second spring (10) are independently and vertically arranged on the plug (4). The two are independently arranged on the plug (4) without interfering with each other, and independently realize the elastic support and driving function of the corresponding core tires, ensuring that the first core tire (1) and the second core tire (2) move independently.

[0025] Optionally, the bushing (3) is a cylindrical structure with a flange (11) and is fitted on the outside of the second core (2). The bushing (3) and the second core (2) are provided with bolt holes (7). The second core (2) is oriented by inserting bolts into the bolt holes (7). The flange (11) is provided with mounting holes (9). The bushing (3) is fixed to the base plate by inserting bolts into the mounting holes (9).

[0026] In this optional embodiment, such as Figure 5 As shown, in order to ensure the stability of the casting air duct positioning core device and enhance the strength of the device, the bushing (3) is fixed to the base plate through the mounting hole (9) on the flange (11) to form the basic support structure of the device and improve the overall stability; the bolt hole (7) realizes the orientation of the second core (2) and restricts the circumferential rotation of the second core (2). The bolt orientation prevents the second core (2) from rotating during operation and ensures the accuracy of the positioning direction; the cylindrical structure wraps around the outside of the second core (2) to provide guidance for the axial movement of the second core (2) and avoids radial shaking.

[0027] Optionally, the plug (4) is disc-shaped with a spring receiving groove (12) in the center. The lower end of the bushing (3) is detachably connected to the edge of the plug (4) by multiple bolts, and multiple bolt holes (7) are evenly distributed around the plug (4).

[0028] In this optional embodiment, such as Figure 1 As shown, the spring receiving groove (12) on the plug (4) positions the spring to prevent it from shifting or tilting during operation; the plug (4) is placed at the bottom of the bushing (3) and is detachably connected by bolts with evenly distributed bolts in the circumference so that the plug (4) is subjected to balanced force and prevents local stress concentration, and can realize quick disassembly and replacement of bushing (3), plug (4), first core (1) and second core (2).

[0029] Optionally, the stepped hole (6) is coaxial with the outer circle of the second core (2).

[0030] In this optional embodiment, such as Figure 2 As shown, the stepped hole (6) is coaxial with the outer circle of the core 2, ensuring that the first core (1) moves along the axial direction, avoiding radial offset, and achieving positioning accuracy in the X and Y directions.

[0031] Optionally, after the first core tire (1) and the second core tire (2) are assembled, four core tire conical surfaces (8) are machined at once by a machining center. The conical surfaces (8) are in contact with the inner cavity of the exhaust manifold on the same plane.

[0032] In this optional embodiment, such as Figures 1 to 3 As shown, in order to ensure the stability of the positioning of the casting air passage positioning core device, the first core (1) and the second core (2) are respectively machined with two core conical surfaces (8). The contact parts of the conical surfaces (8) and the inner cavity of the exhaust manifold are on the same plane. The contact points of the coplanar conical surfaces (8) form a stable positioning reference, avoiding the tilting of the inner cavity of the casting or uneven positioning force caused by the height difference of the contact points.

[0033] This invention enables precise positioning of the air passage in castings, effectively improving the machining accuracy of the air passage positioning core device and reducing the risk of positioning jamming.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A casting air passage positioning core device, characterized in that: It includes a first core, a second core, a first spring, a second spring, a bushing, and a plug. The first spring and the second spring are disposed on the plug. The first core and the second core are coaxially assembled and both have a T-shaped structure. The second core has a stepped hole in its center. The first core is coaxially nested within the second core. The bushing is wrapped around the outside of the second core. The bushing and the plug are detachably connected.

2. The casting air passage positioning core device as described in claim 1, characterized in that: The second core tire has a T-shaped structure, with a raised or block-shaped structure at the top that connects with the first core tire, and a columnar structure at the bottom.

3. The casting air passage positioning core device as described in claim 2, characterized in that: The top of the first spring abuts against the bottom of the first core, and the diameter of the first spring is less than or equal to the inner diameter of the stepped hole. The first spring drives the first core to move up and down. The top of the second spring abuts against the bottom of the second core, and the diameter of the second spring is equal to the outer diameter of the columnar structure of the second core. The second spring drives the second core to move up and down. The first spring and the second spring are independently arranged in parallel and vertically on the plug.

4. The casting air passage positioning core device as described in claim 1, characterized in that: The bushing is a cylindrical structure with a flange, which is fitted onto the outside of the second core. The bushing and the second core are provided with bolt holes. The second core is oriented by inserting bolts into the bolt holes. The flange is provided with mounting holes. The bushing is fixed to the base plate by inserting bolts into the mounting holes.

5. The casting air passage positioning core device as described in claim 4, characterized in that: The plug is disc-shaped with a spring receiving groove in the center. The lower end of the bushing is detachably connected to the edge of the plug by multiple bolts, and the multiple bolt holes are evenly distributed along the circumference of the plug.

6. The casting air passage positioning core device as described in claim 1, characterized in that: The stepped hole is coaxial with the outer circle of the second core.

7. The casting air passage positioning core device as described in claim 1, characterized in that: The first and second core tires are respectively machined with two core tire conical surfaces, and the contact parts of the conical surfaces and the inner cavity of the exhaust manifold are on the same plane.

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