Positioning type cylinder cover oil return duct core assembly tool

Abstract

The utility model discloses a positioning type cylinder cover oil return duct core assembly tool, and relates to the technical field of positioning tools of combustion engines. A positioning type cylinder cover oil return duct core assembly tool comprises a bottom plate and a cushion block, a supporting plate is installed on the bottom plate and on the side edge of the cushion block, a sliding block is installed on the supporting plate, and the outer end of the sliding block corresponds to a sand core in contact with the sliding block in shape. The supporting plates comprise the supporting plate located on the left side and the supporting plate located on the right side, and the supporting plate located on the left side and the supporting plate located on the right side have different heights and are used for positioning different types of sand cores correspondingly. According to the sand core pressing device, the proper pressing state of the sand core can be guaranteed, good pressing fit is kept, and deformation or loose clamping is avoided. Therefore, the common problem of high-end precision castings such as engine aluminum alloy cylinder covers in the production process is effectively solved, and the size consistency of the cylinder cover castings, the casting quality of the cylinder covers and the performance of the applied engines are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning tools for combustion engines, and particularly to a positioning core assembly tool for the oil return channels of a cylinder head. Background Art

[0002] The aluminum alloy cylinder head of an automobile engine belongs to a precision casting part, and the dimensional requirements for the cylinder head casting are very strict. The dimensional consistency of the cylinder head casting directly affects the performance of the automobile engine. For example, the contour size of the combustion chamber of the cylinder head directly affects the volume of the combustion chamber, thereby affecting the power and torque of the engine; the contour sizes of the intake and exhaust ports of the cylinder head directly affect the mixing tumble ratio between gasoline and air during engine combustion, thereby affecting the combustion efficiency of the engine and the control of automobile exhaust emissions. Therefore, it is particularly important to achieve precise control of the dimensions of the cylinder head casting, and the dimensional consistency of the cylinder head casting is one of the key factors affecting the engine performance indicators.

[0003] When casting an aluminum alloy cylinder head of an engine using a metal mold (pattern), several types of sand cores are required for forming, such as intake port sand cores, exhaust port sand cores, upper water channel sand cores, middle water channel sand cores, lower water channel sand cores, oil channel sand cores (internal sand cores), riser sand cores, small oil leg sand cores, and curved through-channel sand cores (external sand cores, which are the oil return channel core assemblies). The positioning and pressing of each sand core and the metal mold are achieved through positioning cooperation. During the production process of cylinder head casting, it is necessary to position and install the oil return channel core assemblies such as the riser sand cores, small oil leg sand cores, and curved through-channel sand cores used. Currently, only ordinary mounting plates and pads are used for positioning and installation, which poses a risk of assembly deformation or loose clamping, directly affecting the casting quality of the cylinder head and the performance of the applied engine. Summary of the Utility Model

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and provide a positioning core assembly tool for the oil return channels of a cylinder head, which can solve the problems that when only ordinary mounting plates and pads are used for positioning and installation, there is a risk of assembly deformation or loose clamping, directly affecting the casting quality of the cylinder head and the performance of the applied engine.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: A positioning core assembly tool for the oil return channels of a cylinder head, comprising:

[0006] A bottom plate, a plurality of cylindrical pins and a plurality of cushion blocks. The plurality of cushion blocks are all fixedly installed on the top of the bottom plate. A plurality of support plates are fixedly connected to the top of the bottom plate. The plurality of support plates are respectively located on both sides of the cushion blocks. Sliders are fixedly installed on the tops of the plurality of support plates. The plurality of sliders are all fixedly installed on the corresponding support plates through the corresponding cylindrical pins; a plurality of installation grooves are opened on the top of the bottom plate. Installation blocks are fixedly connected to the bottoms of the plurality of cushion blocks. The plurality of installation blocks are all inserted into the corresponding installation grooves. A clamping groove is provided on one side of each of the plurality of installation blocks. A plurality of sliding grooves are opened on the bottom of the bottom plate.

[0007] Preferably, one end of each of the plurality of sliders away from the corresponding support plate is adapted to the shape of the contacting core.

[0008] Preferably, the support plates on both sides of the cushion block have different heights.

[0009] Preferably, the plurality of cushion blocks are respectively follow-type cushion blocks of different shapes.

[0010] Preferably, limiting slide plates are slidably connected inside the plurality of sliding grooves. Clamping blocks are fixedly connected to one side of the plurality of limiting slide plates. The plurality of clamping blocks all slide and extend into the corresponding installation grooves and are clamped with the corresponding clamping grooves. Springs are fixedly connected to the sides of the plurality of limiting slide plates away from the corresponding clamping blocks. One ends of the plurality of springs away from the corresponding limiting slide plates are fixedly connected to the inner walls of the corresponding sliding grooves.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: For this positioning type core assembly tool for the oil return passage of the cylinder head, the cushion blocks are used to position the riser core, the support plates are used to position the curved passage core and the small oil leg core, and the sliding fit of the sliders can ensure an appropriate pressing state for such cores, maintaining good pressing fit, without deformation or loose clamping, without causing core rubbing, cracking or breaking due to too small pressing fit clearance, nor causing core shaking and inaccurate positioning due to too large pressing fit clearance, thus effectively solving the common problems in the production process of high-end precision castings of engine aluminum alloy cylinder heads, ensuring the dimensional consistency of the cylinder head castings, as well as the casting quality of the cylinder head and the performance of the applied engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0013] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0014] Figure 2 is a sectional structural schematic diagram of the bottom plate of the present utility model.

[0015] Reference numerals: 1, slider; 2, support plate; 3, cushion block; 4, bottom plate; 5, cylindrical pin; 6, mounting block; 7, mounting groove; 8, clamping groove; 9, clamping block; 10, limiting slide plate; 11, sliding groove; 12, spring. Detailed implementation manners

[0016] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention. In the description of the present invention, it should be understood that for orientation descriptions, such as up, down, front, rear, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention.

[0017] In the description of the present invention, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features. In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0018] Please refer to Figure 1-2 , the present invention provides a technical solution: a positioning type core assembly tool for the cylinder head oil return passage, including:

[0019] A bottom plate 4, a plurality of cylindrical pins 5 and a plurality of cushion blocks 3. The plurality of cushion blocks 3 are all fixedly installed on the top of the bottom plate 4. The top of the bottom plate 4 is fixedly connected with a plurality of support plates 2. The plurality of support plates 2 are respectively located on both sides of the cushion blocks 3. The tops of the plurality of support plates 2 are all fixedly installed with sliders 1. The plurality of sliders 1 are all fixedly installed on the corresponding support plates 2 through the corresponding cylindrical pins 5.

[0020] One end of each of the plurality of sliders 1 away from the corresponding support plate 2 is adapted to the outer shape of the contacted core. The support plates 2 on both sides of the cushion blocks 3 have different heights. The plurality of cushion blocks 3 are respectively follow-type cushion blocks of different shapes.

[0021] A plurality of mounting grooves 7 are formed in the top of the bottom plate 4. Mounting blocks 6 are fixedly connected to the bottoms of the plurality of cushion blocks 3. The plurality of mounting blocks 6 are inserted into the corresponding mounting grooves 7. A clamping groove 8 is provided on one side of each of the plurality of mounting blocks 6. A plurality of sliding grooves 11 are formed in the bottom of the bottom plate 4.

[0022] A limiting slide plate 10 is slidably connected to the inside of each of the plurality of sliding grooves 11. A clamping block 9 is fixedly connected to one side of each of the plurality of limiting slide plates 10. The plurality of clamping blocks 9 all slide and extend into the inside of the corresponding mounting groove 7 and are clamped with the corresponding clamping grooves 8. A spring 12 is fixedly connected to the side of each of the plurality of limiting slide plates 10 away from the corresponding clamping block 9. One end of each of the plurality of springs 12 away from the corresponding limiting slide plate 10 is fixedly connected to the inner wall of the corresponding sliding groove 11.

[0023] Furthermore, when using the device, a slider 1 is installed on the support plate 2 through a cylindrical pin 5. The outer end shape of the slider 1 corresponds to the shape of the core it contacts. The cushion blocks 3 are follow-type cushion blocks of different shapes, and their shapes correspond to the shape of the riser core, ensuring the installation position of the riser core. The slider 1 is movably matched through the cylindrical pin 5 and the positioning long hole on the support plate 2 and can slide left and right on the support plate 2. The support plate 2 includes a support plate 2 on the left for positioning the curved channel core and a support plate 2 on the right for positioning the small oil leg core. The support plate 2 on the left and the support plate 2 on the right have different heights and are respectively used for positioning different types of cores.

[0024] Furthermore, when using the device, by an operator pulling the limiting slide plate 10, the movement of the limiting slide plate 10 will drive the clamping block 9 away from the corresponding clamping groove 8, and the movement of the limiting slide plate 10 will compress the spring 12, thereby facilitating the removal of the cushion block 3 for replacement or maintenance.

[0025] The cushion block 3 is used to position the riser core, and the support plate 2 is used to position the curved channel core and the small oil leg core. The sliding fit of the slider 1 can ensure an appropriate pressing state for such cores, maintaining good pressing fit, without deformation or loose clamping, and without causing core rubbing, cracking or breaking due to too small pressing fit clearance, nor causing core shaking and inaccurate positioning due to too large pressing fit clearance. Thus, it effectively solves the common problems in the production of high-end precision castings of engine aluminum alloy cylinder heads, ensuring the dimensional consistency of cylinder head castings, as well as the cylinder head casting quality and the performance of the applied engine.

[0026] Working principle: A slider 1 is installed on a support plate 2 through a cylindrical pin 5. The outer end shape of the slider 1 corresponds to the shape of the core it contacts. The spacer block 3 is a follow-up spacer block with different shapes, which corresponds to the shape of the riser core, ensuring the installation position of the riser core. The slider 1 is movably matched with the positioning long hole on the support plate 2 through the cylindrical pin 5 and can slide left and right on the support plate 2. The support plate 2 includes a support plate 2 on the left for positioning the curved channel core and a support plate 2 on the right for positioning the small oil foot core. The support plate 2 on the left and the support plate 2 on the right have different heights and are respectively used for positioning different types of cores.

[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can also be made without departing from the gist of the present invention.

Claims

1. The positioning type cylinder head oil return passage core assembly tooling is characterized in that Including: A bottom plate (4), a plurality of cylindrical pins (5) and a plurality of cushion blocks (3). The plurality of cushion blocks (3) are all fixedly installed on the top of the bottom plate (4). A plurality of support plates (2) are fixedly connected to the top of the bottom plate (4). The plurality of support plates (2) are respectively located on both sides of the cushion blocks (3). Sliders (1) are fixedly installed on the tops of the plurality of support plates (2). The plurality of sliders (1) are all fixedly installed on the corresponding support plates (2) through the corresponding cylindrical pins (5); A plurality of installation grooves (7) are formed in the top of the bottom plate (4). Installation blocks (6) are fixedly connected to the bottoms of the plurality of cushion blocks (3). The plurality of installation blocks (6) are all inserted into the corresponding installation grooves (7). A clamping groove (8) is provided on one side of each of the plurality of installation blocks (6). A plurality of sliding grooves (11) are formed in the bottom of the bottom plate (4).

2. The core assembly tooling for the positioning type cylinder head oil return passage according to claim 1, characterized in that: One end of each of the plurality of sliders (1) away from the corresponding support plate (2) is adapted to the shape of the core in contact.

3. The core assembly tooling for the positioning type cylinder head oil return passage according to claim 1 or 2, characterized in that: The support plates (2) on both sides of the cushion block (3) have different heights.

4. The core assembly tooling for the positioning type cylinder head oil return passage according to claim 1 or 2, characterized in that: The plurality of cushion blocks (3) are respectively follow-type cushion blocks of different shapes.

5. The core assembly tooling for the positioning type cylinder head oil return passage according to claim 1, wherein: Limit slide plates (10) are slidably connected to the interiors of the plurality of sliding grooves (11). A clamping block (9) is fixedly connected to one side of each of the plurality of limit slide plates (10). The plurality of clamping blocks (9) all slide and extend into the interiors of the corresponding installation grooves (7) and are clamped with the corresponding clamping grooves (8). A spring (12) is fixedly connected to one side of each of the plurality of limit slide plates (10) away from the corresponding clamping block (9). One end of each of the plurality of springs (12) away from the corresponding limit slide plate (10) is fixedly connected to the inner wall of the corresponding sliding groove (11).

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