A whole piston lower box molding head cold iron positioning and fastening tool

Abstract

The utility model provides a whole piston lower box modeling head cold iron positioning fastening frock belongs to the technical field of casting, including lower box body, the bottom of lower box body is provided with the lower box bottom plate for supporting, the inner chamber of lower box body is provided with the cross gate for guiding the metal liquid flow, the both sides of lower box body are provided with left box closing positioning pin and right box closing positioning pin respectively for closing box positioning, the head position of lower box body is provided with the head cold iron body for accelerating piston combustion chamber face cooling, the bottom of head cold iron body inner chamber is provided with the mould plate positioning pin for fixing mould plate position. The utility model discloses a lower box body modeling frock, and the structure is simple and easy to operate, and the positioning precision is high, and the characteristics are: increase head cold iron positioning tire on the modeling mould plate, make the head cold iron body and lower box body sand tire into an organic whole when modeling, and subsequent fastening is not needed any more, and the positioning and fastening problem are solved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of casting, specifically relating to a positioning and fastening fixture for the head chill of an integral piston lower box. Background Technology

[0002] A piston is a reciprocating component in the cylinder block of a car engine. The basic structure of a piston can be divided into the top, head, and skirt. The piston top is the main part that makes up the combustion chamber, and its shape is related to the type of combustion chamber selected. Gasoline engines mostly use flat-top pistons, which have the advantage of a small heat absorption area. Diesel engine pistons often have various pits on the top, and their specific shape, position, and size must be adapted to the requirements of mixture formation and combustion in diesel engines. Casting is a method of pouring liquid metal into a casting cavity that conforms to the shape of the part, and after it cools and solidifies, a part or blank is obtained. The material being cast is mostly metal that was originally solid but was heated to a liquid state (e.g., copper, iron, aluminum, tin, lead, etc.), while the material of the mold can be sand, metal, or even ceramic. Depending on the requirements, the methods used will also be different.

[0003] The piston is the core component of the engine. The piston combustion chamber surface bears the explosion pressure and high temperature environment. Therefore, when designing the casting process for the piston combustion chamber surface, priority should be given to ensuring that the material is dense and the grains are uniform and fine. The process features bottom pouring with a head chill. This process method ensures the correct piston quality. The traditional method of positioning and fixing the head chill cannot achieve stable production and requires special tooling and molds, resulting in long research and development and production time. Therefore, developing a tooling for positioning and fastening the head chill in an integral piston lower box shape has important practical significance and market demand. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning and fastening fixture for the head chill of an integral piston lower box, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A head chill positioning and fastening fixture for an integral piston lower box includes a lower box body, a lower box base plate for support at the bottom of the lower box body, a horizontal sprue for guiding the flow of molten metal in the inner cavity of the lower box body, a left closing positioning pin and a right closing positioning pin for closing the lower box body on both sides respectively, a head chill body for accelerating the cooling of the piston combustion chamber surface at the head of the lower box body, a mold plate positioning pin for fixing the position of the mold plate at the bottom of the inner cavity of the head chill body, a sprue filter screen connector for filtering impurities in the molten metal at the sprue inlet of the inner cavity of the lower box body, and a head chill positioning jig for fixing its position at the bottom of the head chill body.

[0007] As a preferred embodiment of this utility model, the head chill body is made of a high thermal conductivity alloy to optimize the cooling effect.

[0008] As a preferred embodiment of this utility model, the head cold iron positioning jig is fixed to the lower box bottom plate by hexagonal bolts, which facilitates adjustment and maintenance.

[0009] As a preferred embodiment of this utility model, the head chill positioning jig is fixed to the lower box bottom plate by hexagonal bolts, and the horizontal sprue is fixed to the lower box bottom plate by hexagonal bolts.

[0010] As a preferred embodiment of this utility model, the direct casting channel filter screen joint is made of high-temperature resistant ceramic material to improve the service life of the filter screen.

[0011] As a preferred embodiment of this utility model, the ends of the left and right closing box positioning pins are provided with tapered guide structures to simplify the closing operation.

[0012] As a preferred embodiment of this utility model, the bottom of the lower box base plate is provided with anti-slip texture to enhance the stability of the tooling placement.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the lower box body molding fixture is simple and easy to implement, and has high positioning accuracy. Its features are: a head chill positioning jig is added to the molding plate, and the head chill body and the lower box body sand jig are integrated during molding, so that subsequent fastening is no longer required, thus solving the positioning and fastening problems and improving production efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 This is an exploded view of the structure of this utility model.

[0018] In the diagram: 1. Lower box bottom plate; 2. Horizontal runner; 3. Left closing box positioning pin; 4. Right closing box positioning pin; 5. Lower box body; 6. Head chill body; 7. Mold plate positioning pin; 8. Straight runner filter screen connector; 9. Head chill positioning jig. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0022] Example

[0023] Reference Figure 1-3 This embodiment of the present invention provides a head chill positioning and fastening fixture for an integral piston lower box, including a lower box body 5, a lower box base plate 1 for supporting the lower box body 5, a horizontal sprue 2 for guiding the flow of molten metal in the inner cavity of the lower box body 5, a left closing positioning pin 3 and a right closing positioning pin 4 for closing and positioning on both sides of the lower box body 5, a head chill body 6 for accelerating the cooling of the piston combustion chamber surface at the head position of the lower box body 5, a mold plate positioning pin 7 for fixing the position of the mold plate at the bottom of the inner cavity of the head chill body 6, a sprue filter screen connector 8 for filtering impurities in the molten metal at the sprue inlet of the inner cavity of the lower box body 5, and a head chill positioning jig 9 for fixing its position at the bottom of the head chill body 6.

[0024] Among them, the head chill body 6 is made of a high thermal conductivity alloy to optimize the cooling effect;

[0025] Specifically, the head cold iron positioning jig 9 is fixed to the lower box bottom plate 1 with hexagonal bolts, which facilitates adjustment and maintenance;

[0026] Furthermore, the head cold iron positioning jig 9 is fixed to the lower box bottom plate 1 with hexagonal bolts, and the horizontal sprue 2 is fixed to the lower box bottom plate 1 with hexagonal bolts;

[0027] Preferably, the filter screen connector 8 of the direct casting channel is made of high-temperature resistant ceramic material to improve the service life of the filter screen;

[0028] It should be noted that the ends of the left closing box positioning pin 3 and the right closing box positioning pin 4 are provided with tapered guide structures to simplify the closing operation;

[0029] The bottom of the lower box base plate 1 is provided with anti-slip texture to enhance the stability of the tooling placement;

[0030] When using it, first blow clean the lower box body 5 plate, put the head chill body 6 into the head chill positioning jig 9, fill it with sand, and manually tamp it evenly around the head chill body 6. This completes the connection between the head chill body 6 and the lower box body 5 sand jig, and no further tightening is required, achieving the effect of convenient use and improving practicality.

[0031] In summary, the lower box body 5 molding fixture is simple and easy to implement, with high positioning accuracy. Its features are: the addition of a head chill positioning jig 9 to the molding plate, the head chill body 6 and the lower box body 5 sand jig are integrated during molding, eliminating the need for subsequent fastening, solving the positioning and fastening problems, and improving production efficiency.

[0032] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0033] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0034] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A positioning and fastening fixture for the head chill of an integral piston lower casing, characterized in that: The system includes a lower box body (5), a lower box base plate (1) for supporting the lower box body (5), a horizontal sprue (2) for guiding the flow of molten metal in the inner cavity of the lower box body (5), a left box closing positioning pin (3) and a right box closing positioning pin (4) for box closing positioning on both sides of the lower box body (5), a head chill body (6) for accelerating the cooling of the piston combustion chamber surface at the head position of the lower box body (5), a mold plate positioning pin (7) for fixing the mold plate position at the bottom of the inner cavity of the head chill body (6), a sprue filter screen connector (8) for filtering impurities in the molten metal at the sprue inlet of the inner cavity of the lower box body (5), and a head chill positioning jig (9) for fixing its position at the bottom of the head chill body (6).

2. The integral piston lower casing head chill positioning and fastening fixture according to claim 1, characterized in that: The head chill body (6) is made of a high thermal conductivity alloy to optimize the cooling effect.

3. The integral piston lower casing head chill positioning and fastening fixture according to claim 2, characterized in that: The head cold iron positioning jig (9) is fixed to the lower box bottom plate (1) by hexagonal bolts, which facilitates adjustment and maintenance.

4. The integral piston lower casing head chill positioning and fastening fixture according to claim 3, characterized in that: The head cold iron positioning jig (9) is fixed to the lower box bottom plate (1) by hexagonal bolts, and the horizontal gating channel (2) is fixed to the lower box bottom plate (1) by hexagonal bolts.

5. The integral piston lower casing head chill positioning and fastening fixture according to claim 4, characterized in that: The direct casting channel filter screen connector (8) is made of high-temperature resistant ceramic material to improve the service life of the filter screen.

6. The integral piston lower casing head chill positioning and fastening fixture according to claim 5, characterized in that: The ends of the left and right box-closing positioning pins (3 and 4) are provided with tapered guide structures to simplify the box-closing operation.

7. The integral piston lower casing head chill positioning and fastening fixture according to claim 6, characterized in that: The bottom of the lower box base plate (1) is provided with anti-slip texture to enhance the stability of the tooling placement.

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