A method for separating and assembling cores of an engine block core and an engine block core

Abstract

The application discloses a body sand core splitting and assembling method and an engine body sand core. The body sand core splitting and assembling method comprises the following steps: S1, splitting design is performed on the body sand core, the body sand core is split into N groups of sub-cores, and each group of sub-cores is split into n sand cores; S2, the sand cores in each group of sub-cores are assembled to obtain a sub-core; and S3, the N groups of sub-cores are sequentially lowered into a sand mold and are closed to complete sub-core assembling and mold closing. According to the method, the plurality of sand cores of the body are split into N groups of sub-cores, each group of sub-cores has at least two sand cores, the sand cores in each group of sub-cores are assembled to obtain a sub-core, and finally, the N groups of sub-cores are sequentially lowered into a sand mold and are closed to complete sub-core assembling and mold closing. According to the body sand core splitting and assembling method disclosed by the application, the plurality of sand cores of the body are split into groups, each group of sub-cores has a small number of sand cores, the cumulative error of a single sub-core is reduced, the error of a single sub-core after the sub-core is lowered into a sand mold is further reduced, and the dimensional accuracy of a casting is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casting, in particular to a method for dividing and assembling engine body sand cores. BACKGROUND

[0002] In the related art, the core assembling process of the engine body sand cores is that the large cylinder core group is assembled and lowered as a whole, and the remaining sand cores are lowered one by one by manual carrying or crane lifting.

[0003] Manual carrying or crane lifting cannot guarantee the position accuracy between adjacent sand cores, and the error of single core lowering is accumulated, which affects the dimensional accuracy of the casting.

[0004] Therefore, how to improve the dimensional accuracy of the casting has become a technical problem to be solved by the person skilled in the art. SUMMARY

[0005] The present application provides a method for dividing and assembling engine body sand cores to improve the dimensional accuracy of the casting. The present application also provides an engine body sand core.

[0006] In order to achieve the above-mentioned purpose, the present application provides a method for dividing and assembling engine body sand cores, comprising:

[0007] S1. Designing the division of the engine body sand core, dividing the engine body sand core into N divided cores, and dividing each divided core into n sand cores, wherein N and n are positive integers and N≥2, n≥2;

[0008] S2. Assembling the sand cores of each divided core to obtain the divided core;

[0009] S3. Lowering the N divided cores into the sand mold in sequence and closing the mold to complete the core assembly and mold preparation.

[0010] Preferably, in the method for dividing and assembling engine body sand cores, the assembling of the sand cores of each divided core in S2 is specifically,

[0011] Assembling the sand cores of each divided core by the core assembly jig.

[0012] Preferably, in the method for dividing and assembling engine body sand cores, the lowering of the N divided cores into the sand mold in sequence in S3 is specifically,

[0013] Lifting the divided cores from the core assembly jig in sequence and lowering them into the sand mold.

[0014] Preferably, in the method for dividing and assembling engine body sand cores, the division of the engine body sand core into N divided cores and the division of each divided core into n sand cores in S1 is specifically,

[0015] Dividing the engine body sand core into four divided cores of camshaft hole core group, large cylinder core group, left side edge core group and right side edge core group,

[0016] The camshaft hole core group is composed of a camshaft hole core, a left side water inlet channel core and a right side water inlet channel core,

[0017] The large cylinder core group is composed of a large cylinder core, a front end core and a rear end core,

[0018] The left side edge core group and the right side edge core group are composed of a side edge core, a low temperature water cavity core and an air cavity core;

[0019] The assembling of the sand cores in each group in S2 is specifically,

[0020] The camshaft hole core group is assembled by a camshaft hole core assembling jig,

[0021] The large cylinder core group is assembled by a large cylinder core assembling jig,

[0022] The left side edge core group and the right side edge core group are assembled by a side edge core assembling jig.

[0023] Preferably, in the sand core assembling method of the engine block, the assembling of the camshaft hole core group by the camshaft hole core assembling jig is specifically,

[0024] A plurality of camshaft hole cores are placed into a first positioning structure of a camshaft hole core assembling jig, and the plurality of camshaft hole cores are locked by bolts;

[0025] The camshaft hole core assembling jig is rotated to a first direction, so that the left side water inlet channel core is vertically lowered into the camshaft hole core assembling jig, and the left side water inlet channel core is locked on the camshaft hole core by bolts;

[0026] The camshaft hole core assembling jig is rotated to a second direction, so that the right side water inlet channel core is vertically lowered into the camshaft hole core assembling jig, and the right side water inlet channel core is locked on the camshaft hole core by bolts;

[0027] Wherein, the first direction and the second direction are opposite.

[0028] Preferably, in the sand core assembling method of the engine block, the assembling of the large cylinder core group by the large cylinder core assembling jig is specifically,

[0029] The large cylinder core, the front end core and the rear end core are sequentially placed into a second positioning structure of the large cylinder core assembling jig, and the large cylinder core, the front end core and the rear end core are locked by bolts.

[0030] Preferably, in the sand core assembling method of the engine block, the assembling of the left side edge core group and the right side edge core group by the side edge core assembling jig is specifically,

[0031] The side core is placed into the third positioning structure of the side core assembling mold;

[0032] The side core assembling mold is rotated to vertically place the low-temperature water cavity core and the air cavity core into the side core in sequence, and the low-temperature water cavity core and the air cavity core are locked on the side core by bolts.

[0033] Preferably, in the core assembling method of the engine body sand core, the N core assemblies in S3 are sequentially placed into the sand mold, and the core assembling method comprises the following steps:

[0034] The camshaft hole core assembly, the large cylinder core assembly, the left side core assembly and the right side core assembly are sequentially placed according to the placement positions of the camshaft hole core assembly, the large cylinder core assembly, the left side core assembly and the right side core assembly indicated by the second identifier of the sand mold.

[0035] Preferably, in the core assembling method of the engine body sand core, the clamping in S3 is specifically as follows:

[0036] The clamping is performed according to the clamping position indicated by the second identifier of the sand mold.

[0037] An engine body sand core is manufactured by using the core assembling method of the engine body sand core as described in any one of the above schemes.

[0038] The core assembling method of the engine body sand core provided by the embodiment of the application comprises the following steps: S1. The engine body sand core is designed and divided into N core assemblies, and each core assembly is divided into n sand cores; S2. The sand cores of each core assembly are assembled to obtain a core assembly; and S3. N core assemblies are sequentially placed into a sand mold and clamped to complete core assembling and mold clamping. According to the core assembling method of the engine body sand core, the plurality of sand cores of the engine body are divided into N core assemblies, each core assembly has at least two sand cores, the sand cores of each core assembly are assembled to obtain a core assembly, and N core assemblies are sequentially placed into a sand mold and clamped to complete core assembling and mold clamping. The core assembling method of the engine body sand core disclosed by the embodiment of the application divides the plurality of sand cores of the engine body into a plurality of core assemblies, each core assembly has a small number of sand cores, the cumulative error of a single core assembly is reduced, the error of a single core assembly after the core assembly is placed into a sand mold is reduced, and the dimensional accuracy of a casting is improved.

[0039] The embodiment of the application further discloses an engine body sand core manufactured by using the core assembling method of the engine body sand core disclosed in any one of the above schemes. Since the core assembling method of the engine body sand core has the technical effects described above, the engine body sand core manufactured by using the core assembling method of the engine body sand core also has the same technical effects, which will not be described herein again. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor, and the present application can also be applied to other similar scenarios according to the provided drawings. Unless it is obvious from the language environment or otherwise stated, the same reference numbers in the drawings represent the same structures or operations.

[0041] Figure 1 is a flow chart of the core separation and assembly method of the engine block sand core of the present application;

[0042] Figure 2 is a structural schematic diagram of the engine block sand core of the present application separated into four sub-cores;

[0043] Figure 3 is a structural schematic diagram of the camshaft hole core assembly of the present application;

[0044] Figure 4 is a structural schematic diagram of the large cylinder core assembly of the present application;

[0045] Figure 5 is a structural schematic diagram of the left side edge core assembly of the present application;

[0046] Figure 6 is a structural schematic diagram of the sand mold of the present application.

[0047] The accompanying drawings are described as follows:

[0048] 1-camshaft hole core assembly; 11-camshaft hole core; 12-left side water inlet channel core; 13-right side water inlet channel core; 2-large cylinder core assembly; 21-large cylinder core; 22-front end core; 23-rear end core; 3-left side edge core assembly; 31-side edge core; 32-low temperature water cavity core; 33-air cavity core; 4-right side edge core assembly; 5-sand mold; 51-first mark; 52-second mark. DETAILED DESCRIPTION

[0049] The present application will be further described in detail below in combination with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, but not to limit the application. The described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0050] It should be noted that only parts related to the application are shown in the drawings for the convenience of description. The embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily without conflict, as long as the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the features included in the same sentence can be applied independently, and does not have to be applied together with other features.

[0051] As shown in the present application and claims, unless the context clearly indicates otherwise, the words “one”, “an”, “a”, and / or “the” do not specify a singular form, but can also include a plural form. Generally, the terms “comprise” and “include” only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the sentence “comprises a” does not exclude the presence of another identical element in the process, method, product or device comprising the element.

[0052] In the description of the embodiments of the present application, “ / ” represents or unless otherwise specified, for example, A / B can represent A or B; “and / or” in this document is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” means two or more than two.

[0053] Please refer to Figures 1-6 .

[0054] Some embodiments of the present application disclose a core splitting and assembling method for engine sand cores, comprising:

[0055] S1. Designing the engine sand core for splitting, splitting the engine sand core into N split cores, and splitting each split core into n sand cores, wherein N is a positive integer and N≥2;

[0056] S2. Assembling the sand cores of each group of split cores to obtain split cores;

[0057] S3. N split cores are sequentially lowered into the sand mold 5, and the mold is closed, completing the core assembling and mold closing.

[0058] The sand core of the engine is used to make the inner cavity shape of the casting.

[0059] The engine sand core is designed for splitting, which includes splitting the engine sand core into N split cores, and splitting each split core into n sand cores. After the splitting is completed, the sand cores obtained by splitting are manufactured.

[0060] The number of sand cores of each sub-core can be equal or not equal.

[0061] After the sub-core, the sand cores of each sub-core are assembled to obtain a sub-core, and finally N sub-cores are sequentially lowered into the sand mold 5 and the mold is closed to complete the core assembly and mold assembly.

[0062] By reasonable sub-core design, the cylinder body is divided into multiple sand cores, each sand core is made separately, which can reduce the casting veins of the cylinder body, improve the casting quality, simplify the casting process, and improve the production efficiency of the casting.

[0063] The principle of sub-core of sand core is that each sand core after division is easy to make core and assemble core.

[0064] The engine sand core sub-core assembly method disclosed in the scheme divides the engine sand core into N sub-cores through sub-core design of the engine sand core, each sub-core is divided into n sand cores, each group of sub-cores has a small number of sand cores, reduces the cumulative error of single sub-core assembly, and further reduces the error of single sub-core after the sub-core is lowered into the sand mold 5, and improves the dimensional accuracy of the casting.

[0065] The engine sand core sub-core assembly method disclosed in the scheme modularizes each group of sub-cores as much as possible, can realize sub-core and assembly at the same time, and improves the assembly efficiency of the sub-core to a certain extent.

[0066] In some embodiments, the plurality of sand cores of the engine in S1 are divided into N groups, specifically,

[0067] The engine is divided into camshaft hole core group 1, large cylinder core group 2, left side edge core group 3 and right side edge core group 4 four sub-cores,

[0068] The camshaft hole core group 1 includes three kinds of sand cores of camshaft hole core 11, left side water channel core 12 and right side water channel core 13,

[0069] The large cylinder core group 2 includes three kinds of sand cores of large cylinder core 21, front end core 22 and rear end core 23,

[0070] The left side edge core group 3 and the right side edge core group 4 each include three kinds of sand cores of side edge core 31, low-temperature water cavity core 32 and air cavity core 33.

[0071] Among them, the camshaft hole core 11 is a sand core for forming a camshaft hole, the left side water channel core 12 is a sand core for forming a left side water channel, and the right side water channel core 13 is a sand core for forming a right side water channel;

[0072] The large cylinder core 21 is used for forming the cylinder block of the engine, and can be integrally formed or divided into multiple parts. When the large cylinder core 21 is divided into multiple parts, there are multiple large cylinder cores 21. The front end core 22 is used for forming the front end part of the engine, including the mounting positions of the generator, water pump, air conditioner compressor, fan and other accessories. The rear end core 23 is used for forming the rear end part of the engine.

[0073] The side edge core 31 of the left side edge core group 3 and the right side edge core group 4 is used for forming the complex structure and channel of the side of the engine, including the cooling water channel, oil channel and channel of other auxiliary systems. The low-temperature water cavity core 32 is used for forming the cooling water cavity inside the engine. The air cavity core 33 is used for forming the air cavity inside the engine, including the air inlet channel, air outlet channel or other air flow channels that need to be accurately formed.

[0074] Before designing the sand core, the core assembly process should be deduced first to determine the core assembly sequence, and then the structure of the core head and the core head seat.

[0075] In this scheme, the multiple sand cores of the engine block are divided into the camshaft hole core group 1, the large cylinder core group 2, the left side edge core group 3 and the right side edge core group 4, as shown in Figure 2 The camshaft hole core group 1 is located at the lowermost position, the large cylinder core group 2 is located above the camshaft hole core group 1, and the left side edge core group 3 and the right side edge core group 4 are located on the left and right sides of the large cylinder core group 2.

[0076] The grouping mode of the above-mentioned sand cores is helpful for subsequent core assembly in the sand mold 5.

[0077] The grouping of the sand cores is not limited to the above-mentioned form, and can also be other classification modes, which is designed according to different engine types.

[0078] In some embodiments, the assembling of the sand cores of each group of cores in S2 is specifically,

[0079] The camshaft hole core group 1 is assembled by the camshaft hole core assembly jig;

[0080] The large cylinder core group 2 is assembled by the large cylinder core assembly jig;

[0081] The left side edge core group 3 and the right side edge core group 4 are assembled by the side edge core assembly jig.

[0082] In this scheme, the camshaft hole core group 1, the large cylinder core group 2, the left side edge core group 3 and the right side edge core group 4 are respectively assembled by the camshaft hole core assembly jig, the large cylinder core assembly jig and the side edge core assembly jig. The position of the sand core of each group of cores is controlled by the core assembly jig, so as to reduce the cumulative error caused by single core assembly and further improve the dimensional accuracy of the casting.

[0083] In addition, the left side core group 3 and the right side core group 4 are assembled by using the same side core group core mold, the types of core molds are reduced, and the manufacturing cost of the engine body sand core is reduced.

[0084] The camshaft hole core group 1 is assembled by the camshaft hole core group core mold, specifically,

[0085] The plurality of camshaft hole cores 11 are placed into the first positioning structure of the camshaft hole core group core mold, and the plurality of camshaft hole cores 11 are locked by bolts;

[0086] The camshaft hole core group core mold is rotated to the first direction, so that the left side water channel core 12 is vertically lowered into the camshaft hole core group core mold, and the left side water channel core 12 is locked on the camshaft hole core 11 by bolts;

[0087] The camshaft hole core group core mold is rotated to the second direction, so that the right side water channel core 13 is vertically lowered into the camshaft hole core group core mold, and the right side water channel core 13 is locked on the camshaft hole core 11 by bolts;

[0088] The first direction and the second direction are opposite.

[0089] The plurality of camshaft hole cores 11 are positioned by using the first positioning structure of the camshaft hole core group core mold, so as to ensure the position accuracy of the camshaft hole core 11; after the camshaft hole core 11 is positioned by the first positioning structure, the camshaft hole core 11 is fixed on the camshaft hole core group core mold by bolts, so as to ensure that the position of the camshaft hole core 11 does not change when the left side water channel core 12 and the right side water channel core 13 are assembled with the camshaft hole core 11, thereby not only ensuring the position accuracy of the camshaft hole core 11, but also ensuring the position accuracy of the left side water channel core 12 and the right side water channel core 13.

[0090] After the left side water channel core 12 and the right side water channel core 13 are assembled with the camshaft hole core group 1, the left side water channel core 12 and the right side water channel core 13 are locked on the camshaft hole core 11 by bolts, so as to form an integral whole, and ensure that the relative positions of the three do not change during hoisting.

[0091] In addition, the camshaft hole core group core mold has a rotating function, which facilitates the core of the left side water channel core 12 and the right side water channel core 13 at the best angle, is convenient to operate, and can improve the assembly accuracy of the left side water channel core 12 and the right side water channel core 13 to a certain extent. It should be noted that the chassis of the camshaft hole core group core mold is fixed, the camshaft hole core group core mold has a rotating part, the rotating part drives a plurality of camshaft hole cores 11 to rotate together, so that after the left side water channel core 12 and the right side water channel core 13 are lowered into the camshaft hole core group core mold, the positions of the left side water channel core 12 and the right side water channel core 13 and the camshaft hole core 11 are the assembly positions.

[0092] The left water inlet channel core 12, the right water inlet channel core 13 and the camshaft hole core 11 are fixed by bolts, and the fixing is reliable, and the position of the sand core will not move due to loosening during hoisting and transportation, resulting in uneven wall thickness.

[0093] The large cylinder core group 2 is assembled by the large cylinder core group core jig, specifically,

[0094] The large cylinder core 21, the front end core 22 and the rear end core 23 are sequentially placed into the second positioning structure of the large cylinder core group core jig, and the large cylinder core 21, the front end core 22 and the rear end core 23 are locked by bolts.

[0095] The large cylinder core group core jig positions the large cylinder core 21, the front end core 22 and the rear end core 23 through the second positioning structure, ensures the accurate position of the large cylinder core 21, the front end core 22 and the rear end core 23, and then locks the large cylinder core 21, the front end core 22 and the rear end core 23 by bolts to form a separate core, facilitating subsequent hoisting and transportation.

[0096] The left side core group 3 and the right side core group 4 are assembled by the side core group core jig respectively, and the assembly process can be performed simultaneously or separately, and the structures of the core jigs adopted by the left side core group 3 and the right side core group 4 are the same.

[0097] The left side core group 3 and the right side core group 4 are assembled by the side core group core jig, specifically,

[0098] The side core 31 is placed into the third positioning structure of the side core group core jig, and the side core 31 is locked in the side core group core jig by bolts.

[0099] The side core group core jig is rotated to vertically place the low-temperature water cavity core 32 and the air cavity core 33 in the side core group core jig in sequence, and the low-temperature water cavity core 32 and the air cavity core 33 are locked on the side core 31 by bolts.

[0100] The side core 31 is positioned by the third positioning structure of the side core group core jig to ensure the accurate position of the side core 31; after the side core 31 is positioned by the third positioning structure, the side core 31 is locked in the side core group core jig by bolts to ensure that the position of the side core 31 will not change when the low-temperature water cavity core 32 and the air cavity core 33 are assembled with the side core 31, not only ensuring the accurate position of the side core 31, but also ensuring the accurate position of the low-temperature water cavity core 32 and the air cavity core 33.

[0101] After the low-temperature water cavity core 32, the air cavity core 33 and the side core 31 are assembled, the low-temperature water cavity core 32 and the air cavity core 33 and the side core 31 are locked by bolts to form an integral whole, ensuring that the relative positions of the three will not change during hoisting and transportation of the side core group 31.

[0102] In addition, the side core assembling jig has a rotating function, so that the low-temperature water cavity core 32 and the air cavity core 33 can be assembled at an optimal angle, and the assembling precision of the low-temperature water cavity core 32 and the air cavity core 33 can be improved to a certain extent. It should be noted that the base frame of the side core assembling jig is fixed, and the side core assembling jig has a rotating part, which drives the side core 31 to rotate, so that the positions of the low-temperature water cavity core 32 and the air cavity core 33 relative to the side core 31 are the assembling positions after the low-temperature water cavity core 32 and the air cavity core 33 are lowered into the side core assembling jig.

[0103] The low-temperature water cavity core 32, the air cavity core 33 and the side core 31 are fixed by bolts, and the fixing is reliable, so that the position of the sand core will not move due to loosening during hoisting and transportation, and the wall thickness will not be uneven.

[0104] The N core groups in S3 are lowered into the sand mold 5 in sequence, and the lowering positions of the core groups are indicated by the first identification 51.

[0105] According to the lowering positions of the camshaft hole core group 1, the large cylinder core group 2, the left side core group 3 and the right side core group 4 indicated by the first identification 51 of the sand mold 5, the camshaft hole core group 1, the large cylinder core group 2, the left side core group 3 and the right side core group 4 are lowered in sequence.

[0106] As shown in Figure 6 The number of the first identification 51 is three groups, one of which is used to indicate the lowering positions of the camshaft hole core group 1 and the large cylinder core group 2, one of which is used to indicate the lowering position of the left side core group 3, and the remaining one is used to indicate the lowering position of the right side core group 4.

[0107] The clamping in S3 is specifically as follows.

[0108] The clamping is performed according to the clamping position indicated by the second identification 52 of the sand mold 5.

[0109] The position relationship of each core group can be ensured by the first identification 51 and the second identification 52, and the clamping process is simplified.

[0110] The scheme also discloses an engine body sand core made by the core group assembling method of the engine body sand core.

[0111] Since the core group assembling method of the engine body sand core has the above technical effects, the engine body sand core made by the core group assembling method of the engine body sand core also has the same technical effects, which will not be described here.

[0112] The above description is only the preferred embodiment of the present application and the explanation of the technical principles of the application, and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. The application scope involved in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by the combinations of the above technical features or their equivalent features without departing from the above application concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. A core splitting and assembly method for a body core, characterized by, Comprise: S1. The engine sand core is designed, and the engine sand core is divided into N sub-core, each sub-core is divided into n sand core, N and n are positive integer and N≥2, n≥2; The S1 is divided into N sub-core, each sub-core is divided into n sand core in the engine sand core, specifically, The engine sand core is divided into camshaft hole core group (1), large cylinder core group (2), left side edge core group (3) and right side edge core group (4) four sub-cores, The camshaft hole core group (1) is divided into a plurality of camshaft hole cores (11), left side water channel cores (12) and right side water channel cores (13) three kinds of sand cores, The large cylinder core group (2) is divided into large cylinder core (21), front end core (22) and rear end core (23) three kinds of sand cores, The left side edge core group (3) and the right side edge core group (4) are divided into side edge core (31), low temperature water cavity core (32) and air cavity core (33) three kinds of sand cores; S2. The sand core of each sub-core is assembled to obtain the sub-core, and the sand core of each sub-core is assembled in the S2 specifically, The camshaft hole core group (1) is assembled by camshaft hole core group core mould, The large cylinder core group (2) is assembled by large cylinder core group core mould, The left side edge core group (3) and the right side edge core group (4) are assembled by side edge core group core mould, S3. N sub-cores are sequentially lowered into sand mould (5), and N sub-cores are sequentially lowered into sand mould (5) in the S3, which is specifically, according to the lower position of the camshaft hole core group (1), the large cylinder core group (2), the left side edge core group (3) and the right side edge core group (4) indicated by the first mark (51) of the sand mould (5), sequentially lower the camshaft hole core group (1), the large cylinder core group (2), the left side edge core group (3) and the right side edge core group (4), and combine the box, complete the core assembly and research box.

2. The method of claim 1, wherein The camshaft hole core group (1) is assembled by camshaft hole core group core mould, specifically, A plurality of camshaft hole cores (11) are placed into the first positioning structure of the camshaft hole core group core mould, and a plurality of the camshaft hole cores (11) are locked by bolts; The camshaft hole core group core mould is rotated to the first direction, so that the left side water channel core (12) is vertically lowered into the camshaft hole core group core mould, and the left side water channel core (12) is locked on the camshaft hole core (11) by the bolt; The camshaft hole core group core mould is rotated to the second direction, so that the right side water channel core (13) is vertically lowered into the camshaft hole core group core mould, and the right side water channel core (13) is locked on the camshaft hole core (11) by the bolt; Wherein, the first direction and the second direction are opposite.

3. The method of claim 1, wherein The large cylinder core group (2) is assembled by large cylinder core group core mould, specifically, The large cylinder core (21), the front end core (22) and the rear end core (23) are sequentially placed into the second positioning structure of the large cylinder core group core mould, and the large cylinder core (21), the front end core (22) and the rear end core (23) are locked by bolts.

4. The method of claim 1, wherein The left side edge core group (3) and the right side edge core group (4) are assembled by side edge core group core mould, specifically, The side core (31) is placed into the third positioning structure of the side core assembling mold; The side core assembling mold is rotated to vertically place the low-temperature water cavity core (32) and the air cavity core (33) into the side core assembling mold in sequence, and the low-temperature water cavity core (32) and the air cavity core (33) are locked on the side core (31) by bolts.

5. The method of claim 4, wherein, The closing in the S3 is specifically, The closing is performed according to the closing position indicated by the second mark (52) of the sand mold (5).

6. An engine block core characterized by, The method is used to manufacture the body sand core.

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