A core group for an engine intermediate housing and a core assembling process for the core group

Abstract

The present invention discloses a core group for an engine intermediate housing and a core assembling process for the core group, which relates to the technical field of manufacturing of automotive engine intermediate housings. The core group of the present invention includes an intake side core and an exhaust side core arranged oppositely; end cores are respectively arranged on both ends of the intake side core and the exhaust side core; an oil passage core is arranged between the intake side core and the exhaust side core; positioning grooves one are respectively arranged at both ends of the intake side core, and a positioning groove two is arranged in the middle of the intake side core; the exhaust side core has the same structure as the intake side core; positioning bosses one cooperating with the positioning grooves one are respectively arranged at both ends of the end core, and positioning bosses two cooperating with the positioning grooves two are respectively arranged at both ends of the oil passage core. Through the assembly of the intake side core, the exhaust side core, the end core and the oil passage core, the present invention reduces the types and quantities of cores for the intermediate housing, achieving the purposes of reducing core-making costs, improving core assembling accuracy and simplifying the manufacturing process.

Description

Technical Field

[0001] The invention belongs to the technical field of manufacturing of the intermediate housing of an automotive engine, and particularly relates to a core group of the intermediate housing of an engine and a core assembling process of the core group. Background Art

[0002] The intermediate housing of an automotive engine is an important part of the engine power assembly. Its main functions are: connecting the oil channels and bearing the operation of the crankshaft, and it is a bridge connecting the engine block and the oil pan. With the continuous development of energy conservation, consumption reduction and lightweight of automobiles, higher and higher requirements are put forward for the casting process level of the intermediate housing of the engine to ensure that the castings have process characteristics such as light weight, high strength, high dimensional accuracy and stable quality.

[0003] The intermediate housing is generally designed with inner cavities of intake and exhaust channels and a crankcase inner cavity, and the basic wall thickness is 4 - 5 mm, which belongs to a typical thin-walled complex casting. In the traditional casting process design, the triethylamine cold box core-making method is generally used to shoot the crankcase core and the oil channel core, while the intake and exhaust sides and the front and rear ends of the product are formed by green sand molding, and then the production is carried out by the method of manual core assembling (screw locking + glue coating). Due to the wide distribution range and various types of the inner cavity structure of the intermediate housing, for a long time, this process plan generally has problems such as high production cost (the weight of the core accounts for 80% of the weight of the casting), low core assembling efficiency and poor dimensional accuracy of the casting, which brings certain adverse effects to the mass production of the product. Summary of the Invention

[0004] The purpose of the invention is to provide a core group of the intermediate housing of an engine and a core assembling process of the core group, which greatly reduces the number of cores, improves the core assembling efficiency and the accuracy of core assembling and lower core placing, and is easy to obtain intermediate housing castings with stable quality and excellent performance.

[0005] To solve the above technical problems, the invention is realized through the following technical solutions:

[0006] The invention provides a core group of the intermediate housing of an engine, including an intake side core and an exhaust side core arranged oppositely; at both ends of the intake side core and the exhaust side core, an end core one and an end core two are respectively arranged; an oil channel core is arranged between the intake side core and the exhaust side core.

[0007] Further, positioning grooves one A and one C are respectively arranged at both ends of the intake side core, a boss A is arranged in the middle of the intake side core, and at least one positioning groove two A is arranged on the boss A; positioning grooves one B and one D are respectively arranged at both ends of the exhaust side core, a boss B is arranged in the middle of the exhaust side core, and at least one positioning groove two B is arranged on the boss B.

[0008] Further, positioning bosses 1A and 1B that cooperate with positioning grooves 1A and 1C are respectively arranged at both ends of the end core 1;

[0009] Positioning bosses 1C and 1D that cooperate with positioning grooves 1B and 1D are respectively arranged at both ends of the end core 2.

[0010] Further, positioning bosses 2 and 3 that cooperate with positioning grooves 2A and 2B are respectively arranged at both ends of the oil passage core.

[0011] Further, the number of the positioning grooves 2B is 2, the number of the positioning grooves 2A is 2, the distance between the two positioning grooves 2B is L1, the distance between the two positioning grooves 2A is L2, and L1 > L2.

[0012] Further, through holes are arranged at both ends of the intake side core and the exhaust side core, and a groove 1 and a groove 2 that cooperate with the through holes are respectively arranged on the outer sides of the end core 1 and the end core 2.

[0013] A core assembling process for a core group of an engine intermediate housing includes:

[0014] Stp1. First, place the intake side core flat on the core assembling platform;

[0015] Stp2. Insert the positioning boss 2 at one end of the oil passage core into two positioning grooves 2A in the middle of the intake side core to complete pre-assembly;

[0016] Stp3. Then, insert the end core 1 and the end core 2 at both ends respectively through the cooperation of the positioning groove 1A and the positioning boss 1A, and the cooperation of the positioning boss 1C and the positioning groove 1C to complete pre-assembly;

[0017] Stp4. Insert the exhaust side core through the cooperation of the positioning groove 2B and the positioning boss 3, and the cooperation of the positioning groove 1B (22), the positioning groove 1D and the positioning bosses 1B and 1D;

[0018] Stp5. Pass two core assembling screws through the through holes on both sides of the intake side core and the exhaust side core, and then lock them to end the core combination;

[0019] Wherein, the rod body of the core assembling screw passes through the groove 1 / groove 2.

[0020] The present invention has the following beneficial effects:

[0021] 1. Through the assembly of the intake-side core, exhaust-side core, end core, and oil passage core, the present invention reduces the types and quantities of cores in the intermediate box body, achieving the objectives of reducing core-making costs, improving core assembly accuracy, simplifying the manufacturing process, and simultaneously enhancing the core assembly speed and efficiency.

[0022] 2. The cores of the present invention adopt an insertion-type fit. After core assembly, a screw is inserted for fastening, eliminating the glue application / nail shooting combination process in the traditional process, and further improving the stability and reliability of the cores.

[0023] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. Description of the Drawings

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 Schematic diagram of the assembly structure of the intermediate box body core group of the present invention;

[0026] Figure 2 Schematic diagram of the intake-side core structure of the present invention;

[0027] Figure 3 Schematic diagram of the right-side view structure of the first end core of the present invention;

[0028] Figure 4 Schematic diagram of the first oil passage core structure of the present invention;

[0029] Figure 5 Schematic diagram of the left-side view structure of the first end core of the present invention;

[0030] Figure 6 Schematic diagram of the right-side view structure of the second end core of the present invention;

[0031] Figure 7 Schematic diagram of the exhaust-side core structure of the present invention. Detailed Embodiments

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating orientation or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] Please refer to Figure 1-7 As shown, the present invention is a core group of an engine intermediate housing, including an intake side core 1 and an exhaust side core 2 arranged opposite to each other; an end core one 3 and an end core two 5 are respectively arranged on both ends of the intake side core 1 and the exhaust side core 2; an oil passage core 4 is arranged between the intake side core 1 and the exhaust side core 2.

[0035] Preferably, positioning grooves one A12 and one C14 are respectively arranged at both ends of the intake side core 1, a boss A10 is arranged in the middle of the intake side core 1, and at least one positioning groove two A11 is arranged on the boss A10; positioning grooves one B22 and one D24 are respectively arranged at both ends of the exhaust side core 2, a boss B20 is arranged in the middle of the exhaust side core 2, and at least one positioning groove two B21 is arranged on the boss B20.

[0036] Preferably, positioning bosses one A31 and one B33 that cooperate with the positioning grooves one A12 and one C14 are respectively arranged at both ends of the end core one 3;

[0037] Positioning bosses one C51 and one D that cooperate with the positioning grooves one B22 and one D24 are respectively arranged at both ends of the end core two 5.

[0038] Preferably, positioning bosses two 41 that cooperate with the positioning groove two A11 and a positioning boss three 42 that cooperate with the positioning groove two B21 are respectively arranged at both ends of the oil passage core 4.

[0039] Preferably, the number of the positioning grooves two B21 is 2, the number of the positioning grooves two A11 is 2, the distance between the two positioning grooves two B21 is L1, the distance between the two positioning grooves two A11 is L2, and L1 > L2.

[0040] Preferably, a through hole 13 is arranged at both ends of the intake side core 1 and the exhaust side core 2, and a groove one 32 and a groove two 52 that cooperate with the through hole 13 are respectively arranged on the outer sides of the end core one 3 and the end core two 5.

[0041] A core assembling process for a core group of an engine intermediate housing includes:

[0042] Stp1. First, place the intake-side core 1 flat on the core-assembly platform;

[0043] Stp2. Insert the positioning boss two 41 at one end of the oil-channel core 4 into the two positioning grooves two A11 in the middle of the intake-side core 1 to complete the preliminary assembly;

[0044] Stp3. Then, insert the end core one 3 and the end core two 5 at both ends respectively through the cooperation of the positioning groove one A12 and the positioning boss one A31, and the cooperation of the positioning boss one C51 and the positioning groove one C14 to complete the preliminary assembly;

[0045] Stp4. Insert the exhaust-side core 2 through the cooperation of the positioning groove two B21 and the positioning boss three 42, and the positioning grooves one B22, the positioning groove one D24 and the positioning boss one B33, the positioning boss one D;

[0046] Stp5. Pass two core-assembly screws through the through-holes 13 on both sides of the intake-side core 1 and the exhaust-side core 2, and then lock them to complete the core combination;

[0047] Among them, the body of the core-assembly screw passes through the groove one 32 / groove two 52.

[0048] Among them, the sizes of the positioning boss one A31 and the positioning boss one B33 are different, and the sizes of the positioning boss one C51 and the positioning boss one D are different.

[0049] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0050] The above-disclosed preferred embodiments of the present invention are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical fields can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A core group for an engine intermediate housing, characterized in that: It includes an intake-side core (1) and an exhaust-side core (2) which are oppositely arranged; At both ends of the intake-side core (1) and the exhaust-side core (2), an end core one (3) and an end core two (5) are respectively arranged; An oil passage core (4) is arranged between the intake-side core (1) and the exhaust-side core (2); At both ends of the intake-side core (1), a positioning groove one A (12) and a positioning groove one C (14) are respectively arranged. A boss A (10) is arranged in the middle of the intake-side core (1), and at least one positioning groove two A (11) is arranged on the boss A (10); At both ends of the exhaust-side core (2), a positioning groove one B (22) and a positioning groove one D (24) are respectively arranged. A boss B (20) is arranged in the middle of the exhaust-side core (2), and at least one positioning groove two B (21) is arranged on the boss B (20); At both ends of the end core one (3), positioning bosses one A (31) and one B (33) which are matched with the positioning groove one A (12) and the positioning groove one C (14) are respectively arranged; At both ends of the end core two (5), positioning bosses one C (51) and one D which are matched with the positioning groove one B (22) and the positioning groove one D (24) are respectively arranged; At both ends of the oil passage core (4), a positioning boss two (41) which is matched with the positioning groove two A (11) and a positioning boss three (42) which is matched with the positioning groove two B (21) are respectively arranged; At both ends of the intake-side core (1) and the exhaust-side core (2), a through hole (13) is arranged. On the outer sides of the end core one (3) and the end core two (5), a groove one (32) and a groove two (52) which are matched with the through hole (13) are respectively arranged; Pass two core assembly screws through the through holes (13) on both sides of the intake-side core (1) and the exhaust-side core (2), and then lock them; the body of the core assembly screw passes through the groove one (32) / groove two (52).

2. The core set of an engine intermediate housing according to claim 1, characterized in that, The number of the positioning groove two B (21) is 2, and the number of the positioning groove two A (11) is 2; The distance between the two positioning groove two B (21) is L1, and the distance between the two positioning groove two A (11) is L2, where L1 > L2.

3. A core assembly process for the core group of an engine intermediate housing as described in claim 2, characterized in that, It includes: Stp1. First, place the intake-side core (1) flat on the core assembly platform; Stp2. Insert the positioning boss two (41) at one end of the oil passage core (4) into the two positioning groove two A (11) in the middle of the intake-side core (1) to complete pre-assembly; Stp3. Then insert the end core one (3) and the end core two (5) at both ends respectively through the cooperation of the positioning groove one A (12) and the positioning boss one A (31), and the cooperation of the positioning boss one C (51) and the positioning groove one C (14) to complete pre-assembly; Stp4. Insert the exhaust-side core (2) through the cooperation of the positioning groove two B (21) and the positioning boss three (42), and the cooperation of the positioning groove one B (22), the positioning groove one D (24) and the positioning boss one B (33), the positioning boss one D; Stp5. Pass two core assembly screws through the through holes (13) on both sides of the intake side core (1) and the exhaust side core (2), and then lock them to complete the core assembly; Among them, the body of the core assembly screw passes through the first groove (32) / the second groove (52).

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