Engine body sand core and casting sand mold
By combining the assembly method and positioning structure, the problem of the engine body sand core floating and falling off during the casting process is solved, the solid fixation and position accuracy of the sand core are achieved, resource waste is reduced, and castings are scrapped.
Patent Information
- Application Number
- CN202323456758.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-15
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-15
AI Technical Summary
In the prior art, the sand core of the engine body is prone to float or fall off during the pouring process due to the buoyancy of the iron, resulting in the scrapping of castings, and the traditional nail gun fixing method has problems of waste of resources, insufficient strength and dimensional deviation.
Using a combined assembly method, the sand core is firmly fixed by setting positioning parts, auxiliary positioning core heads and adhesives, reducing the amount of dip coating and drying, and using a cone-shaped core head and square limit block for limiting positioning. Fixed to avoid floating and falling off.
The firm fixation of the sand core is achieved, resource waste is reduced, the position accuracy and stability of the sand core is ensured, and the castings are scrapped.
Smart Images
Figure CN222175865U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine body design and assembly, in particular to an engine body sand core and a casting sand mold. Background Art
[0002] The engine body is equipped with an oil cavity of truss structure, which is formed by sand core during the production process of blank. The truss core has a complex structure, with "□" type and "L" type, and is distributed on the left side of the body, that is, the upper mold side of the pouring process. If the sand core is not firmly fixed, the overall sand core is prone to position or even fall off during transportation. Moreover, during the pouring process, the "□" type and "L" type sand cores are located above the overall core group, and are prone to floating cores due to the buoyancy of molten iron. If the above situation occurs, the casting will be scrapped, so it is necessary to use a suitable method to assemble the core and fix the truss core to the overall core group.
[0003] The current process usually uses a nail gun to fix the truss core directly on the integral core group after the core is placed. The existing method requires the truss core to be manually dipped and dried in a surface drying oven in advance. After the integral core group is placed, an additional station is required to assemble the truss core. Therefore, this method has several disadvantages:
[0004] The first is that multiple processes are added, including dipping, drying, core repair, sand core transfer, and core assembly, resulting in a waste of manpower, materials, kinetic energy and other resources;
[0005] The second is that due to the low strength of the sand core, the core head is easily broken when the truss is fixed with nails, and falls into the sand mold to form waste;
[0006] The third is that it is fixed by a nail gun, lacks limit positioning, and the sand core is easily offset, causing dimensional deviation. Utility Model Content
[0007] In order to overcome the deficiencies in the prior art, the main purpose of the utility model is to provide an engine body sand core and a casting sand mold. The engine body sand core abandons the traditional nail gun fixing method and adopts a combined assembly method. The sand core is firmly fixed without problems such as falling off, core breakage, and core drifting. The overall core assembly reduces the amount of work such as sand core dipping and drying.
[0008] In order to achieve the above-mentioned object, the utility model provides an engine body sand core in a first aspect, which comprises a first truss core, a front end core and a plurality of cylinder cores, and a first positioning component is provided on some of the cylinder cores;
[0009] The first truss core is provided with a first connecting core head and a second connecting core head, the first connecting core head is connected with the first positioning component in a cooperative manner, and the second connecting core head is connected with the front end core in a cooperative manner.
[0010] Furthermore, an auxiliary positioning core head is also provided on the first truss core, and the auxiliary positioning core head is used for matching and connecting with the upper sand mold.
[0011] Furthermore, the first positioning component is a first positioning groove, and the first connecting core head is plugged and matched with the first positioning groove.
[0012] Furthermore, a connecting groove is provided on the front end core, and the connecting groove is plug-fitted with the second connecting core head.
[0013] Furthermore, a first adhesive layer is provided on the first positioning component and / or on the outer side of the first connecting core head;
[0014] A second adhesive layer is provided on the outer side surface of the second connecting core head and / or at the connection between the front end core and the second connecting core head.
[0015] Furthermore, it also includes a second truss core, a limiting component and a second positioning component are arranged on part of the cylinder core, a limiting groove and at least one third connecting core head are arranged on the second truss core, the limiting groove is connected with the limiting component hook, and the third connecting core head is cooperatively connected with the second positioning component.
[0016] Furthermore, the second truss core has a different geometric structure from the first truss core.
[0017] Further, the limiting component is a limiting block;
[0018] The second positioning component is a second positioning groove, and the second positioning groove is plug-fitted with the third connecting core head.
[0019] Furthermore, a third adhesive layer is provided on the second positioning component and / or on the outer side surface of the third connecting core head.
[0020] In order to achieve the above-mentioned object, the second aspect of the utility model provides an engine body casting sand mold, which includes an upper sand mold, a lower sand mold and the above-mentioned engine body sand core; wherein,
[0021] The engine body sand core is placed in a mold cavity formed by the upper sand mold and the lower sand mold.
[0022] Advantages of this utility model:
[0023] 1. This utility model designs different core assembly methods according to different structural truss cores, abandons the traditional fixing method of nail gun, and the sand core is firmly fixed without problems such as falling off, core breaking, and core drifting. The overall core assembly reduces the workload of sand core dipping, drying, etc.
[0024] 2. For the "L" type sand core, a combination of auxiliary positioning core head, locking structure and adhesive is used to fix it.
[0025] 3. A frustum-shaped core head is set at the bottom of the "L"-shaped truss core. It serves as a horizontal limit. When assembling the core, the frustum-shaped core head at the bottom can be turned to find the matching position of the other end of the "L"-shaped truss core and the front core. The matching method of the core heads at both ends can limit the horizontal and vertical positions of the sand core. At the same time, the auxiliary positioning core head set in conjunction with the upper sand mold can prevent the sand core from floating due to the buoyancy of the molten iron, ensuring the firmness and position accuracy of the sand core.
[0026] 4. For the “□” type truss core, a hook structure and adhesive are used for fixing.
[0027] 5. The "□"-shaped truss core, combined with the characteristics of its lighter sand core, is provided with a square limit block on the cylinder core. The limit groove of the "□"-shaped truss core is hooked on the square limit block, and the vertical direction is locked by the vertical downward deadweight of the sand core. The square core head at the bottom of the "□"-shaped truss core is fixed by an adhesive to ensure the firmness and position accuracy of the sand core. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those skilled in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. In the accompanying drawings:
[0029] Figure 1 A schematic diagram of the structure of the engine body sand core in the embodiment provided by the utility model;
[0030] Figure 2 A schematic diagram of the matching core assembly of the first truss core, the front end core and the cylinder core in the embodiment provided by the utility model;
[0031] Figure 3 This is a schematic diagram of the matching core assembly of the second truss core and the cylinder core in the embodiment provided by the utility model.
[0032] In the figure:
[0033] 1. First truss core; 11. First connecting core head; 12. Second connecting core head; 13. Auxiliary positioning core head;
[0034] 2. Second truss core; 21. Limiting groove; 22. Third connecting core head;
[0035] 3. Cylinder core; 31. First positioning component; 32. Second positioning component; 33. Limiting component;
[0036] 4. front end core; 41. connecting groove. DETAILED DESCRIPTION
[0037] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0038] Truss core: A slender sand core that has a connecting function and spans different areas of the overall core group.
[0039] A first aspect of the utility model provides an engine body sand core.
[0040] like Figure 1-Figure 3 As shown, the engine body sand core includes a first truss core 1, a front end core 4 and multiple cylinder cores 3; wherein, a first positioning component 31 is provided on some of the cylinder cores 3; a first connecting core head 11 and a second connecting core head 12 are provided on the first truss core 1, the first connecting core head 11 is cooperatively connected with the first positioning component 31, and the second connecting core head 12 is cooperatively connected with the front end core 4.
[0041] In the utility model, the first truss core 1 connects the cylinder core 3 and the front end core 4. At the same time, since the first truss core 1 is located on the upper side of the overall core group, in order to prevent the sand core from floating during the pouring process, the first truss core 1 is additionally provided with an auxiliary positioning core head 13 to make it cooperate with the upper sand mold.
[0042] like Figure 2 As shown, the first truss core 1 is also provided with an auxiliary positioning core head 13, and the auxiliary positioning core head 13 is used for matching and connecting with the upper sand mold.
[0043] Exemplarily, the first truss core 1 connects two cylinder cores 3, a front end core 4 and four parts of the upper sand mold. Three connecting core heads are arranged on the first truss core 1, and the various parts are combined and matched with each other.
[0044] In the embodiment of the present invention, the first connecting core head 11 and the second connecting core head 12 are respectively arranged at two opposite ends of the first truss core 1 .
[0045] In the embodiment of the present invention, the auxiliary positioning core head 13 is placed between the first connecting core head 11 and the second connecting core head 12 .
[0046] In an embodiment of the utility model, the shape of the auxiliary positioning core head 13 includes a truncated cone, and a groove whose shape is adapted to the shape of the auxiliary positioning core head 13 is provided on the upper sand mold. When the box is closed, the auxiliary positioning core head 13 is inserted into the corresponding groove of the upper sand mold to form a matching connection, thereby ensuring that the sand core does not shake or float, causing waste.
[0047] Exemplarily, the auxiliary positioning core head 13 is in the shape of a truncated cone.
[0048] In certain embodiments of the present invention, there is a gap between the auxiliary positioning core head 13 and the groove wall of the upper sand mold to ensure that the sand is not squeezed during insertion and that the sand core does not shake or float to cause waste.
[0049] It is worth mentioning that the size of the auxiliary positioning core head 13 can also be set according to actual conditions. For example, the diameter of the large diameter end of the truncated cone-shaped auxiliary positioning core head 13 is 20 mm.
[0050] The gap width can be set according to actual conditions, for example, the gap width is about 1 mm.
[0051] like Figure 2 As shown, the first truss core 1 is an "L"-shaped truss core structure.
[0052] Exemplarily, the first connecting core head 11 and the second connecting core head 12 are respectively arranged at opposite ends of the “L”-shaped first truss core 1 , and the auxiliary positioning core head 13 is placed between the first connecting core head 11 and the second connecting core head 12 .
[0053] like Figure 2 As shown, the first positioning component 31 is a first positioning groove, and the first connecting core head 11 is plugged and matched with the first positioning groove.
[0054] In the embodiment of the present invention, the shape of the first positioning groove is adapted to the shape of the first connecting core head 11 to achieve a better connection effect.
[0055] In the embodiment of the present invention, the shape of the first connecting core head 11 includes a truncated cone shape.
[0056] Exemplarily, the first connecting core head 11 is designed in a truncated cone shape and is inserted into a first positioning groove on the cylinder core 3 to ensure that the sand core is limited in the horizontal direction.
[0057] It should be noted that when the first connecting core head 11 is connected with two adjacent cylinder cores 3, the first positioning grooves on the two cylinder cores 3 are combined to form a positioning groove, and the first connecting core head 11 is inserted into the positioning groove formed by the combination of the two cylinder cores 3 to ensure the horizontal limitation of the sand core.
[0058] In some embodiments of the present invention, there is a gap between the first connecting core head 11 and the first positioning groove of the cylinder core 3, so as to ensure that the first connecting core head 11 can be inserted and that the first connecting core head 11 does not shake and cause dimensional deviation.
[0059] It is worth mentioning that the gap width can be set according to actual conditions, for example, the gap width is about 1 mm.
[0060] The size of the first connecting core head 11 can also be set according to actual conditions. For example, the diameter of the large diameter end of the truncated cone-shaped first connecting core head 11 is 28 mm.
[0061] In some embodiments of the present invention, a first adhesive layer is disposed on the first positioning component 31 .
[0062] In some embodiments of the present invention, a first adhesive layer is disposed on the outer side of the first connecting core head 11 .
[0063] In some embodiments of the present invention, a first adhesive layer is disposed on the first positioning component 31 and on the outer side surface of the first connecting core head 11 .
[0064] It is worth mentioning that, in order to ensure the firmness and position accuracy of the first truss core 1 , an adhesive is coated at the connection between the first positioning component 31 and the first connecting core head 11 to form a first adhesive layer therebetween.
[0065] Exemplarily, an adhesive is injected into the first positioning groove, and a first adhesive layer is formed between the first connecting core head 11 and the groove wall of the first positioning groove, so as to ensure that the first truss core 1 is firmly and accurately limited in the horizontal direction.
[0066] like Figure 2 As shown, a connection groove 41 is provided on the front end core 4, and the connection groove 41 is plugged and matched with the second connection core head 12 to ensure that the first truss core 1 is limited in the vertical direction.
[0067] In the embodiment of the present invention, the shape of the second connecting core head 12 includes a block shape, and the shape of the connecting groove 41 is adapted to the shape of the second connecting core head 12 .
[0068] Exemplarily, the second connecting core head 12 is in a block shape.
[0069] The connecting groove 41 may be designed as an open groove structure, that is, the connecting groove 41 has at least one groove side wall connected to the outside.
[0070] It is worth mentioning that the size of the second connecting core head 12 can be set according to actual conditions, for example, a 32*30*5mm square core head can be set.
[0071] In some embodiments of the present invention, a second adhesive layer is disposed on the outer side of the second connecting core head 12 .
[0072] In some embodiments of the present invention, a second adhesive layer is provided at the connection between the front end core 4 and the second connecting core head 12 .
[0073] In some embodiments of the present invention, a second adhesive layer is provided on the outer side surface of the second connecting core head 12 and at the connection between the front end core 4 and the second connecting core head 12 .
[0074] It is worth mentioning that, in order to ensure the firmness and position accuracy of the first truss core 1 , an adhesive is coated at the connection between the front end core 4 and the second connecting core head 12 to form a second adhesive layer therebetween.
[0075] Exemplarily, an adhesive is injected into the connecting groove 41 , and a second adhesive layer is formed between the second connecting core head 12 and the groove wall of the connecting groove 41 , so as to ensure that the sand core is firmly and accurately limited in the vertical direction.
[0076] like Figure 3 As shown, the engine body sand core also includes a second truss core 2, a limiting component 33 and a second positioning component 32 are arranged on a part of the cylinder core 3, a limiting groove 21 and at least one third connecting core head 22 are arranged on the second truss core 2, the limiting groove 21 is hookedly connected with the limiting component 33, and the third connecting core head 22 is cooperatively connected with the second positioning component 32.
[0077] In the utility model, the second truss core 2 connects the upper and lower parts of the cylinder core 3 along the height direction of the cylinder core 3, wherein the upper part of the cylinder core 3 and the upper part of the second truss core 2 are matched with each other in the form of a limiting hook to ensure horizontal limitation; when the overall core group is placed vertically, the second truss core 2 can be limited in the vertical direction by its own downward weight; the lower part of the cylinder core 3 is connected to the third connecting core head 22 of the lower part of the second truss core 2 through the second positioning component 32.
[0078] In the embodiment of the present utility model, the limiting component 33 is a limiting block, and the second truss core 2 is hooked to the limiting block by using the limiting groove 21 to ensure horizontal limitation.
[0079] like Figure 3 As shown, the second truss core 2 is in a “□” shape, and a limiting block is provided on the upper portion of the second truss core 2 to form a hook connection corresponding to the limiting groove 21 on the second truss core 2 .
[0080] The size of the limit block can be set according to actual conditions, for example, a 60*12*10mm limit block can be set.
[0081] In the embodiment of the present invention, the second truss core 2 has a different geometric structure from the first truss core 1 .
[0082] like Figure 3 As shown, the second positioning component 32 is a second positioning groove, and the second positioning groove is plug-fitted with the third connecting core head 22 .
[0083] In the embodiment of the present utility model, the shape of the third connecting core head 22 includes a block shape, and the shape of the second positioning groove is adapted to the shape of the third connecting core head 22 .
[0084] Exemplarily, the third connecting core head 22 is in a block shape.
[0085] In the embodiment of the utility model, the third connecting core head 22 and the second positioning groove can be set to be open-fit, that is, the third connecting core head 22 of the second truss core 2 is pressed into the non-closed second positioning groove on the cylinder core 3 and fixed with adhesive.
[0086] The non-closed second positioning groove can be understood as a second positioning groove having at least one groove side wall communicating with the outside.
[0087] In some embodiments of the present invention, a third adhesive layer is disposed on the second positioning member 32 .
[0088] In some embodiments of the present invention, a third adhesive layer is disposed on the outer side of the third connecting core head 22 .
[0089] In some embodiments of the present invention, a third adhesive layer is disposed on the second positioning component 32 and on the outer side of the third connecting core head 22 .
[0090] It is worth mentioning that, in order to ensure the firmness and position accuracy of the second truss core 2 , an adhesive is coated at the connection between the second positioning component 32 and the third connecting core head 22 to form a third adhesive layer therebetween.
[0091] Exemplarily, an adhesive is injected into the second positioning groove, and a third adhesive layer is formed between the third connecting core head 22 and the groove wall of the second positioning groove, thereby ensuring that the second truss core 2 is firm and accurate.
[0092] A second aspect of the utility model provides an engine body casting sand mold.
[0093] The engine body casting sand mold in the utility model comprises an upper sand mold, a lower sand mold and the engine body sand core provided by the first aspect of the utility model; wherein,
[0094] The engine body sand core is placed in a mold cavity formed by the upper sand mold and the lower sand mold.
[0095] In the utility model, the "□"-shaped truss core located at the upper part of the overall core group, combined with the characteristic of its lighter sand core, is provided with a square limit block on the cylinder core 3, and the limit groove 21 of the "□"-shaped truss core is hooked on the square limit block, and the vertical direction is locked by the vertical downward deadweight of the sand core, and the square core head at the bottom of the "□"-shaped truss core is fixed by an adhesive, thereby ensuring the firmness and position accuracy of the sand core.
[0096] In the utility model, a frustum-shaped core head is provided at the bottom of the "L"-shaped truss core, which serves as a horizontal limit. When assembling the core, the matching position of the other end of the "L"-shaped truss core and the front end core 4 can be accurately found by rotating the frustum-shaped core head at the bottom. The matching mode of the core heads at both ends can limit the horizontal and vertical positions of the sand core. At the same time, the auxiliary positioning core head 13 provided in cooperation with the upper sand mold can prevent the sand core from floating due to the buoyancy of the molten iron, thereby ensuring the firmness and position accuracy of the sand core.
[0097] It should be noted that the term "comprises" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusions. For example, the inclusion of a series of components is not necessarily limited to those components explicitly listed, but may include other components that are not explicitly listed or inherent to the components.
[0098] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have specific directions, or to be constructed and operated in specific directions.
[0099] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.
[0100] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.
[0101] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0102] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. An engine body sand core, characterized in that: It comprises a first truss core, a front end core and a plurality of cylinder cores, and some of the cylinder cores are provided with a first positioning component; The first truss core is provided with a first connecting core head and a second connecting core head, the first connecting core head is cooperatively connected with the first positioning component, and the second connecting core head is cooperatively connected with the front end core.
2. The engine block sand core according to claim 1, characterized in that: The first truss core is also provided with an auxiliary positioning core head, and the auxiliary positioning core head is used for matching and connecting with the upper sand mold.
3. The engine block sand core according to claim 1, characterized in that: The first positioning component is a first positioning groove, and the first connecting core head is plugged and matched with the first positioning groove.
4. The engine block sand core according to claim 1, characterized in that: The front end core is provided with a connection groove, and the connection groove is plug-fitted with the second connection core head.
5. The engine block sand core according to claim 1, characterized in that: A first adhesive layer is provided on the first positioning component and / or on the outer side of the first connecting core head; A second adhesive layer is provided on the outer side surface of the second connecting core head and / or at the connection between the front end core and the second connecting core head.
6. The engine block sand core according to claim 1, characterized in that: It also includes a second truss core, a limiting component and a second positioning component are arranged on part of the cylinder core, a limiting groove and at least one third connecting core head are arranged on the second truss core, the limiting groove is connected with the limiting component hook, and the third connecting core head is cooperatively connected with the second positioning component.
7. The engine block sand core according to claim 6, characterized in that: The second truss core has a different geometry than the first truss core.
8. The engine block sand core according to claim 6, characterized in that: The limiting component is a limiting block; The second positioning component is a second positioning groove, and the second positioning groove is plug-fitted with the third connecting core head.
9. The engine block sand core according to claim 8, characterized in that: A third adhesive layer is provided on the second positioning component and / or on the outer side surface of the third connecting core head.
10. An engine body casting sand mold, characterized in that: It comprises an upper sand mold, a lower sand mold and an engine body sand core as described in any one of claims 1 to 9; wherein, The engine body sand core is placed in a mold cavity formed by the upper sand mold and the lower sand mold.