Pouring system for controlling loose defect of bearing seat precision casting

Abstract

The utility model discloses a pouring system for controlling the loose defect of a bearing block precision casting, which comprises a casting cavity, a pouring cup, a cross gate and a sprue, the pouring cup is arranged on the upper surface of the cross gate, the casting cavity is positioned below the cross gate, the sprue is positioned on one side of the casting cavity and the cross gate, and the sprue is positioned on the other side of the casting cavity and the cross gate. The two sides of the pouring cup are connected with the upper surface of the transverse pouring gate through ventilation rods, the bottom of the transverse pouring gate is communicated with a casting cavity through a vertical inner pouring gate, and the straight pouring gate is communicated with the casting cavity through a stepped inner pouring gate. According to the utility model, by arranging the composite pouring system, the complex part of the casting cavity is filled and fed, so that the generation of an isolated liquid phase region in the casting cavity is avoided, and the formation of a loose defect is effectively controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing seat casting, in particular to a casting system for controlling the looseness defect of a bearing seat precision casting. Background Art

[0002] The bearing seat is a mechanical part used to support the bearing and is widely used. The bearing seat has a complex structure and contains multiple bosses, grooves, holes and other structures that are prone to casting defects. And because the bearing seat needs to support the movement of the bearing, it needs to ensure a certain strength and toughness, and at the same time, it is necessary to avoid the leakage of lubricating oil in the bearing seat. Therefore, the casting requirements for the casting are high, and casting defects such as looseness, pores, slag inclusions, and cold shuts must not appear.

[0003] At present, the existing pouring scheme is bottom pouring or top pouring. It is difficult to ensure a low porosity for castings with many hot nodes and uneven wall thickness. Therefore, it is necessary to improve the existing pouring system to ensure that the pouring system covers multiple nodes of the casting, ensure that the casting can obtain the shrinkage of the molten metal when solidifying, and avoid the appearance of isolated liquid phase areas inside the casting cavity. Utility Model Content

[0004] The utility model aims to provide a pouring system for controlling the loose defects of precision castings of a bearing seat, so as to solve the technical problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows: a casting system for controlling the loose defects of the bearing seat precision casting, comprising a casting cavity, a pouring cup, a cross runner and a straight runner, the pouring cup is arranged on the upper surface of the cross runner, the casting cavity is located below the cross runner, the straight runner is located on one side of the casting cavity and the cross runner, the two sides of the pouring cup are connected to the upper surface of the cross runner through a ventilation rod, the bottom of the cross runner is connected to the casting cavity through a vertical ingrowth, and the straight runner is connected to the casting cavity through a stepped ingrowth.

[0006] Preferably, the casting cavity is formed according to the contour of the precision casting of the bearing seat, thereby presenting a sideways hollow truncated platform with a flange, a stepped platform bracket and a square base from top to bottom.

[0007] Preferably, the bottom of the vertical ingates is connected to the upper surface of the hollow truncated table of the casting cavity, and the stepped ingates are connected to the flange and the square base of the casting cavity.

[0008] Preferably, two vertical ingates are provided.

[0009] Preferably, three stepped ingates are provided, wherein two of the stepped ingates are arranged on the flange of the casting cavity, and the other stepped ingate is arranged on the square base of the casting cavity.

[0010] Preferably, the width of the cross runner is greater than that of the vertical ingates and the straight runner.

[0011] Preferably, the sprue is located on one side of the casting cavity flange, and the top end of the sprue is connected to the end of the runner.

[0012] The utility model provides a pouring system for controlling the loose defects of the precision casting of the bearing seat, which has the following advantages:

[0013] The utility model provides a composite pouring system to fill and compensate for the complex parts of the casting cavity, thereby preventing the generation of isolated liquid phase areas in the casting cavity and effectively controlling the formation of porosity defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

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

[0016] Figure 2 It is a connection diagram of the horizontal runner and the vertical runner in the utility model;

[0017] Explanation of the markings in the figure: 1. Casting cavity; 2. Gate cup; 3. Ventilation rod; 4. Horizontal runner; 5. Vertical ingrate; 6. Straight runner; 7. Stepped ingrate. DETAILED DESCRIPTION

[0018] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0019] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of 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, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0022] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0023] In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of a pouring system for controlling the loose defects of a bearing seat precision casting of the utility model in conjunction with the accompanying drawings.

[0024] like Figure 1-2As shown, a pouring system for controlling the loose defects of a bearing seat precision casting of the utility model comprises a casting cavity 1, a pouring cup 2, a runner 4 and a straight runner 6, the pouring cup 2 is arranged on the upper surface of the runner 4, the casting cavity 1 is located below the runner 4, the straight runner 6 is located on one side of the casting cavity 1 and the runner 4, both sides of the pouring cup 2 are connected to the upper surface of the runner 4 through a vent rod 3, the vent rod 3 ensures that more molten metal enters the runner 4 at the same time, the bottom of the runner 4 is connected to the casting cavity 1 through a vertical ingrow 5, the width of the runner 4 is greater than the vertical ingrow 5 and the straight runner 6, and the straight runner 6 is connected to the casting cavity 1 through a stepped ingrow 7. The casting cavity 1 is formed according to the contour of the bearing seat precision casting, and presents a hollow truncated platform with a flange, a stepped bracket and a square base from top to bottom. The casting cavity 1 is made of a mullite shell. After the molten metal is injected into the casting cavity 1 and cooled, it becomes a stainless steel precision casting of the bearing seat. The sprue 6 is located on the flange side of the casting cavity 1, and the top of the sprue 6 is connected to the end of the runner 4. The molten metal flows into the sprue 6 on the side of the casting cavity 1 through the runner 4. The bottom of the vertical ingates 5 is connected to the upper surface of the hollow truncated cone of the casting cavity 1, and the stepped ingates 7 are connected to the flange and square base of the casting cavity 1. Two vertical ingates 5 are provided, and three stepped ingates 7 are provided, two of which are arranged on the flange of the casting cavity 1, and the other stepped ingates 7 is arranged on the square base of the casting cavity 1. The vertical ingates 5 and the stepped ingates 7 are distributed on the top and side of the casting cavity 1, ensuring that the molten metal fills the casting 1 and compensates for shrinkage from multiple positions, avoiding the generation of isolated liquid phase areas in the casting cavity 1 and reducing the generation of loose defects.

[0025] When in use, the molten metal is poured into the pouring cup 2, and the metal liquid enters the cross runner 4 through the pouring cup 2 and the vent rod 3. Part of the metal liquid flows from the cross runner 4 into the vertical ingrowth 5, and then is injected into the casting cavity 1 from the top; part of the metal liquid flows into the straight runner 6 through the cross runner 4, and is injected into the casting cavity 1 from the side through the stepped ingrowth 7. The casting cavity 1 is filled and compensated for shrinkage through the pouring system, thereby avoiding the formation of isolated liquid phase areas in the casting cavity 1 when the casting solidifies.

[0026] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A pouring system for controlling the looseness defect of a bearing housing precision casting, characterized in that: The invention comprises a casting cavity (1), a pouring cup (2), a runner (4) and a sprue (6), wherein the pouring cup (2) is arranged on the upper surface of the runner (4), the casting cavity (1) is located below the runner (4), the sprue (6) is located on one side of the casting cavity (1) and the runner (4), the two sides of the pouring cup (2) are connected to the upper surface of the runner (4) through a vent rod (3), the bottom of the runner (4) is connected to the casting cavity (1) through a vertical ingrow (5), and the sprue (6) is connected to the casting cavity (1) through a stepped ingrow (7).

2. A pouring system for controlling the looseness defect of a bearing seat precision casting according to claim 1, characterized in that: The casting cavity (1) is formed according to the contour of the precision casting of the bearing seat, and presents a sideways-inclined hollow circular platform with a flange, a stepped platform bracket and a square base from top to bottom.

3. A pouring system for controlling the looseness defect of a bearing seat precision casting according to claim 2, characterized in that: The bottom of the vertical ingrate (5) is connected to the upper surface of the hollow truncated table of the casting cavity (1), and the stepped ingrate (7) is connected to the flange and the square base of the casting cavity (1).

4. A pouring system for controlling the looseness defect of a bearing seat precision casting according to claim 1, characterized in that: The vertical ingates (5) are provided with two.

5. A pouring system for controlling the looseness defect of a bearing housing precision casting according to claim 1, characterized in that: Three stepped ingates (7) are provided, two of which are arranged on the flange of the casting cavity (1), and the other stepped ingates (7) is arranged on the square base of the casting cavity (1).

6. A pouring system for controlling the looseness defect of a bearing seat precision casting according to claim 1, characterized in that: The width of the horizontal runner (4) is greater than that of the vertical ingrowth (5) and the straight runner (6).

7. A pouring system for controlling the looseness defect of a bearing housing precision casting according to claim 1, characterized in that: The sprue (6) is located on one side of the flange of the casting cavity (1), and the top end of the sprue (6) is connected to the end of the runner (4).

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