A core skeleton structure and a sand core manufacturing and assembling method

Abstract

The application belongs to the technical field of sand cores, and discloses a core bone structure and a sand core manufacturing and core assembling method. The core bone structure is used for hoisting, processing and assembling multiple sand cores in cooperation with a lifting appliance. The core bone structure comprises a main core bone, a connecting piece, a lifting ring and a guide column. The main core bone is configured to be embedded in the sand grit of a sand core. The connecting piece is arranged on the main core bone and comprises a first connecting part and a second connecting part. The first connecting part and the second connecting part are located in the same axial direction, and the first connecting part and the second connecting part extend to opposite sides of the sand grit, respectively. The first connecting part can be detachably connected with the lifting appliance, and the second connecting part can be detachably connected with the first connecting part of another core bone structure. The core bone structure provided by the application is embedded in the sand grit of the sand core, which helps to improve the structural strength of the sand core, thereby reducing the situation that the sand core is easily dropped or even collapsed under stress.

Description

Technical Field

[0001] This invention relates to the field of sand core technology, and in particular to a core assembly knot and a method for manufacturing and assembling sand cores. Background Technology

[0002] With the development of lightweight and integrated metal products in the market, large castings using sand casting are becoming increasingly common. During the prototype trial stage, molds are generally not used due to cost considerations. Large sand cores are primarily formed using CNC subtractive sand blanks. However, currently, there are no positioning references on the sand blanks; these references are all created by CNC rough milling, which is labor-intensive and time-consuming. Core assembly is a crucial step in the sand casting process. Because sand cores themselves have low strength, they are prone to sand falling off or even collapsing under stress. Large sand cores, due to their large weight (≥500KG), cannot be subjected to excessive friction during core assembly, making operation and assembly extremely difficult.

[0003] Therefore, the above problems urgently need to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a core structure and a method for manufacturing and assembling sand cores, so as to solve the problem that large sand cores are inconvenient to operate, process and assemble due to their large weight.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A core frame structure for use with lifting equipment to lift, process, and assemble multiple sand cores, the core frame structure comprising:

[0007] The main core is configured to be embedded within the sand blank of the sand core;

[0008] A connector is disposed on the main core. The connector includes a first connecting part and a second connecting part, which are located on the same axial direction. The first connecting part and the second connecting part extend to opposite sides of the sand blank. The first connecting part can be detachably connected to the lifting device, and the second connecting part can be detachably connected to the first connecting part of another core structure.

[0009] Preferably, multiple connectors are provided, and the multiple connectors are evenly distributed on the main core.

[0010] Preferably, the core structure further includes:

[0011] The guide post is detachably connected to the first connecting part, and the guide post can be adapted to and snapped into the second connecting part.

[0012] Preferably, the first connecting part is a threaded sleeve, and the lifting tool or the guide post is threaded to the threaded sleeve.

[0013] Preferably, the second connecting part is a guide sleeve, the guide sleeve includes a tapered guide hole, and the guide post is similar in shape to the guide hole.

[0014] Preferably, the main core is arranged in an I-shape.

[0015] Preferably, the main core is arranged in a square shape.

[0016] A method for manufacturing and assembling sand cores, for manufacturing sand cores including the above-described core structure, the method comprising the following steps:

[0017] The main core is placed inside the sand mold;

[0018] The sand material is filled into the sand blank mold to form a sand blank;

[0019] Connect the first connecting part on the sand blank to the lifting device, and lift the sand blank onto the workbench;

[0020] The sand blank is subjected to material reduction to produce a sand core.

[0021] Preferably, the core manufacturing and core assembly method further includes the following steps:

[0022] The sand core includes a lower sand core and an upper sand core;

[0023] Connect the first connecting part of the lower sand core to the lifting device, and lift the lower sand core onto the workbench;

[0024] Separate the first connecting part of the lower sand core from the lifting device;

[0025] Connect the first connecting part of the upper sand core to the lifting device, and lift the upper sand core above the lower sand core;

[0026] The second connecting part on the upper sand core is connected to the first connecting part on the lower sand core to guide and position the upper sand core;

[0027] Slowly place the upper sand core onto the lower sand core;

[0028] Separate the first connecting part of the upper sand core from the lifting device;

[0029] Repeat the previous steps multiple times to complete the assembly of multiple sets of upper and lower sand cores.

[0030] Preferably, the sand core assembly method further includes:

[0031] Before placing the lower sand core on the worktable, the lower sand core is positioned using the second connecting part on the lower sand core and the positioning member preset on the worktable.

[0032] The beneficial effects of this invention are:

[0033] 1. The core structure provided by the present invention helps to improve the structural strength of the sand core by embedding the main core in the sand blank of the sand core, thereby reducing the situation where the sand core is prone to sand falling or even collapse under stress.

[0034] 2. The core structure provided by the present invention connects the lifting ring to the first connecting part, which can help to lift the sand core, thereby improving the convenience of operating the sand core and assembling the core.

[0035] 3. The guide post of the core core structure provided by the present invention can be gradually engaged with the second connecting part during core assembly, thereby guiding and positioning the sand core, which helps to further improve the convenience of core assembly.

[0036] 4. The core structure provided by the present invention uses a hoisting method to transport the sand core, which can reduce the interference of the hoisted sand core with other sand cores around it during operation. Attached Figure Description

[0037] Figure 1 This is a cross-sectional view of the core-bone structure provided by the present invention. Figure 1 ;

[0038] Figure 2 This is a cross-sectional view of the core-bone structure provided by the present invention. Figure 2 ;

[0039] Figure 3 This is a schematic diagram of the core structure provided by the present invention;

[0040] Figure 4 This is a structural schematic diagram of the upper and lower sand core assembly process provided by the present invention;

[0041] Figure 5 This is a flowchart of the sand core manufacturing and core assembly method provided by the present invention.

[0042] In the picture:

[0043] 100. Sand blank; 10. Main core; 20. Connector; 30. First connecting part; 40. Second connecting part; 50. Lifting tool; 60. Guide column. Detailed Implementation

[0044] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0045] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0046] In this application, the term "and / or" describes a relationship between related objects, indicating that three relationships can exist. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the existence of only one centrifugal vortex magnetic pump, the simultaneous existence of one centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump, or the existence of only one centrifugal vortex magnetic pump. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0047] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0048] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0049] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0050] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0051] Based on the foregoing, molds are generally not used during the prototype manufacturing stage due to cost considerations. Large sand cores are primarily formed using CNC subtractive sand blanks (100mm). However, currently, there are no positioning references on the 100mm sand blanks; these references are all created by CNC rough milling, which is labor-intensive and time-consuming. Core assembly is a crucial step in the sand casting process. Because sand cores themselves have low strength, they are prone to sand falling off or even collapsing under stress. Large sand cores, due to their large weight (≥500KG), cannot be subjected to excessive friction during core assembly, making operation and assembly extremely difficult.

[0052] Please see Figures 1 to 5 To address the aforementioned issues, this embodiment provides a core structure for use with a lifting device 50 for lifting, processing, and assembling multiple sand cores. The core structure includes a main core 10, a connector 20, a lifting ring (not shown in the figure), and a guide post 60 (not shown in the figure). The main core 10 is configured to be embedded within the sand blank 100 of the sand core. The connector 20 is disposed on the main core 10 and includes a first connecting portion 30 and a second connecting portion 40. The first connecting portion 30 and the second connecting portion 40 are located on the same axial direction and extend to opposite sides of the sand blank 100. The first connecting portion 30 can be detachably connected to the lifting device 50, and the second connecting portion 40 can be detachably connected to the first connecting portion 30 of another core structure.

[0053] It is understandable that by embedding the main core 10 within the sand blank 100 of the sand core, the structural strength of the sand core is improved, thereby reducing the likelihood of sand falling off or even collapsing under stress. It is also understandable that by connecting the first connecting part 30 to the lifting device 50, the sand core can be lifted and transported using the lifting device 50, thereby improving the convenience of operating and assembling the sand core.

[0054] It is also understandable that the second connecting part 40 can be detachably connected to the first connecting part 30 of another core structure during core assembly, thereby guiding and positioning the sand core and further improving the ease of core assembly. It is also understandable that using a hoisting method to move the sand core reduces interference from other surrounding sand cores during operation.

[0055] This embodiment also provides a method for manufacturing and assembling sand cores, for manufacturing sand cores including the above-described core structure. The method for manufacturing and assembling sand cores includes the following steps:

[0056] Place the main core 10 into the sand mold;

[0057] The sand material is filled into the sand blank mold to make a sand blank 100;

[0058] Connect the first connecting part 30 on the core structure to the lifting device 50, and lift the sand blank 100 onto the workbench;

[0059] The sand blank 100 is subjected to material reduction to produce a sand core.

[0060] To improve the ease of placing the sand blank 100 in the preset position, the sand core manufacturing and core assembly method also includes:

[0061] Before placing the sand blank 100 on the workbench, the sand blank 100 is positioned using the second connecting part 40 on the sand blank 100 and the guide post 60 preset on the workbench.

[0062] The common core assembly methods in existing technologies mainly include the following three steps: 1. Leaving a gap on the outer wall of the sand core for side-hanging hoisting of the lower core; 2. Making countersunk holes on the mating surface of the sand core and then inserting locating pins; 3. Making a custom hoisting fixture. However, this core assembly method is quite inconvenient when assembling large sand cores with multiple inner cores.

[0063] Therefore, to improve the ease of assembling large multi-core components, this embodiment also provides a sand core manufacturing and assembly method, which further includes the following steps:

[0064] Sand cores include lower sand cores and upper sand cores;

[0065] Connect the first connecting part 30 of the lower sand core to the lifting device 50, and lift the lower sand core onto the workbench;

[0066] Separate the first connecting part 30 of the lower sand core from the lifting device 50;

[0067] Connect the first connecting part 30 of the upper sand core to the lifting device 50, and lift the upper sand core above the lower sand core;

[0068] The second connecting part 40 on the upper sand core is connected to the first connecting part 30 on the lower sand core to guide and position the upper sand core.

[0069] Slowly place the upper sand core onto the lower sand core;

[0070] Separate the first connecting part 30 of the upper sand core from the lifting device 50;

[0071] Repeat the previous steps multiple times to complete the assembly of multiple sets of upper and lower sand cores.

[0072] To improve the ease of placing the lower sand blank 100 on the worktable, the sand core assembly method also includes:

[0073] Before placing the lower sand core on the worktable, the lower sand core is positioned using the second connecting part 40 on the lower sand core and the positioning part preset on the worktable.

[0074] It should be noted that the positioning components preset on the workbench can be designed according to the actual application scenario, and this embodiment does not impose specific requirements or restrictions on them.

[0075] Specifically, multiple connectors 20 are provided, and the multiple connectors 20 are evenly distributed on the main core 10. In this embodiment, four connectors 20 are provided, and the four connectors 20 are respectively located at the four corners of the sand core. It can be understood that the provision of multiple connectors 20 helps to improve the stability of hoisting the sand core.

[0076] Furthermore, the core structure also includes guide posts 60, which are detachably connected to the first connecting part 30 and can be fitted and engaged with the second connecting part 40. In this embodiment, the number of guide posts 60 is set according to the number of connecting parts 20. It can be understood that during the core assembly process, the guide posts 60 can gradually engage with the second connecting part 40, thereby guiding the sand core.

[0077] Furthermore, the first connecting part 30 is a threaded sleeve, and the lifting device 50 or the guide post 60 is threadedly connected to the threaded sleeve. It is understood that both the lifting device 50 and the guide post 60 are connected to the threaded sleeve by a threaded connection, resulting in a simple structure, reliable connection, low cost, and convenient disassembly. It is also understood that both the lifting device 50 and the guide post 60 can be threaded to the threaded sleeve, thus allowing for free switching between the lifting device 50 and the guide post 60 on the threaded sleeve. This allows for the appropriate selection of the lifting device 50 or the guide post 60 during material reduction processing and core assembly to meet the needs of lifting and positioning. In practical applications, this provides significant convenience for core assembly of multi-layered, multi-sectioned sand cores. It should be noted that the lifting device 50 and the guide post 60 are existing technologies, and will not be described in detail in this embodiment.

[0078] Furthermore, the second connecting part 40 is a guide sleeve, which includes a tapered guide hole, and the guide post 60 is similar in shape to the guide hole. It can be understood that the tapered guide hole can better guide the guide post 60, thereby allowing the guide post 60 to enter the guide hole more smoothly.

[0079] To further enhance the structural strength of the sand blank 100, the main core rib 10 is arranged in an I-shape, thereby increasing the sand-gripping area and improving the sand-holding strength. Of course, in other embodiments, the main core rib 10 is arranged in a U-shape, which also increases the sand-gripping area and improves the sand-holding strength. It should be noted that the main core rib 10 can also be configured in other shapes that increase the sand-gripping area; this embodiment does not impose specific requirements or limitations on this.

[0080] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A core structure for use with a lifting device (50) for lifting, processing, and assembling multiple sand cores, characterized in that, The core structure includes: The main core (10) is configured to be embedded in the sand blank (100) of the sand core; A connector (20) is disposed on the main core (10). The connector (20) includes a first connecting part (30) and a second connecting part (40). The first connecting part (30) and the second connecting part (40) are located in the same axial direction. The first connecting part (30) and the second connecting part (40) extend to opposite sides of the sand blank (100). The first connecting part (30) can be detachably connected to the lifting device (50), and the second connecting part (40) can be detachably connected to the first connecting part (30) of another core structure. The core structure also includes: The guide post (60) is detachably connected to the first connecting part (30), and the guide post (60) can be adapted to and snapped into the second connecting part (40); The first connecting part (30) is a threaded sleeve, and the lifting tool (50) or the guide post (60) is threaded to the threaded sleeve; The second connecting part (40) is a guide sleeve, which includes a tapered guide hole, and the guide post (60) is similar in shape to the guide hole.

2. The core-bone structure according to claim 1, characterized in that, Multiple connectors (20) are provided, and the multiple connectors (20) are evenly distributed on the main core (10).

3. The core-bone structure according to claim 1, characterized in that, The main core (10) is arranged in an I-shape.

4. The core-bone structure according to claim 1, characterized in that, The main core (10) is arranged in a square shape.

5. A method for manufacturing and assembling sand cores, for manufacturing sand cores comprising the core structure as described in any one of claims 1-3, characterized in that, The method for manufacturing and assembling sand cores includes the following steps: The main core (10) is placed in the sand mold; The sand material is filled into the sand blank mold to form a sand blank (100). Connect the first connecting part (30) on the sand blank (100) to the lifting device (50), and lift the sand blank (100) onto the workbench; The sand blank (100) is subjected to material reduction to form a sand core.

6. A method for manufacturing and assembling sand cores according to claim 5, characterized in that, The sand core manufacturing and core assembly method further includes the following steps: The sand core includes a lower sand core and an upper sand core; Connect the first connecting part (30) of the lower sand core to the lifting device (50), and lift the lower sand core onto the workbench; Separate the first connecting part (30) of the lower sand core from the lifting device (50); Connect the first connecting part (30) of the upper sand core to the lifting device (50), and lift the upper sand core above the lower sand core; The second connecting part (40) on the upper sand core is connected to the first connecting part (30) on the lower sand core to guide and position the upper sand core; Slowly place the upper sand core onto the lower sand core; Separate the first connecting part (30) of the upper sand core from the lifting device (50); Repeat the previous steps multiple times to complete the assembly of multiple sets of upper and lower sand cores.

7. A method for manufacturing and assembling sand cores according to claim 6, characterized in that, The sand core assembly method further includes: Before placing the lower sand core on the workbench, the lower sand core is positioned using the second connecting part (40) on the lower sand core and the positioning member preset on the workbench.

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