Steering knuckle pipe orifice molding sand core structure with feeding function
By embedding a thermite heating block in the shaft part of the sand core body, the shrinkage problem caused by the difficulty in replenishing molten iron during the casting process of the steering knuckle was solved, thus achieving product quality stability and low-cost design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-16
- Publication Date
- 2026-04-10
AI Technical Summary
During the casting process of the steering knuckle, it is not easy to replenish molten iron on one side of the pipe opening, which leads to shrinkage cavity problem. The existing riser design still has a probability of shrinkage cavity, resulting in unstable product quality.
A heating block is embedded in the shaft of the sand core body. The heating block is made of thermite and its arc surface is flush with the shaft to slow down the cooling rate, thereby improving the ability to replenish molten iron and improve the shrinkage problem.
By slowing down the cooling rate of molten iron, the ability to replenish molten iron is improved, the shrinkage problem is mitigated, product quality is ensured to be stable, and the structure is simple and low in cost.
Smart Images
Figure CN224101778U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of parts casting, and in particular to a sand core structure for forming steering knuckle nozzles with a feeding function. Background Technology
[0002] Steering knuckle (e.g.) Figure 1 As shown, during casting, a sand core needs to be placed on the sand mold to form the nozzle. However, in the actual casting process, because molten iron is not easily replenished on one side of the nozzle, shrinkage cavities are prone to occur, seriously affecting product quality. The current solution is to set a riser on one side of the nozzle on the sand mold (i.e., the second riser 500 in the figure). However, the steering knuckle nozzles processed in this way still have a certain probability of shrinkage cavities, and the quality is not very stable. Utility Model Content
[0003] In view of this, the purpose of this utility model is to provide a simple, low-cost, convenient and practical steering knuckle tube forming sand core structure with shrinkage compensation function, to improve the shrinkage problem and ensure stable product quality.
[0004] This utility model is achieved by the following scheme: a steering knuckle tube opening forming sand core structure with a shrinkage compensation function, including a sand core body, the sand core body is provided with a shaft portion for forming the steering knuckle tube opening, and a heating block is embedded on one side of the shaft portion.
[0005] Furthermore, a groove for embedding a heating block is provided on one side of the shaft portion of the sand core body.
[0006] Furthermore, the outer side of the heating block is an arc-shaped surface with the same radius as the shaft, and the arc-shaped surface is flush with the surface of the shaft.
[0007] Furthermore, the heating block is made of aluminothermic agent.
[0008] Furthermore, the heating element has a length of 7-10cm, a width of 2-3cm, and a thickness of 1-2cm.
[0009] Compared with the prior art, the present invention has the following beneficial effects: The design of the steering knuckle tube opening forming sand core structure with feeding function is reasonable, simple, easy to implement, low in investment cost, convenient and practical. It is conducive to improving the iron feeding capacity on one side of the tube opening during the steering knuckle casting process, improving the shrinkage cavity problem, and ensuring stable product quality.
[0010] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through specific embodiments and related drawings. Attached Figure Description
[0011] Figure 1 is a perspective view of the knuckle of the utility model;
[0012] Figure 2 is a simple schematic diagram of the prior art knuckle casting process (sand mold is omitted);
[0013] Figure 3 is a simple schematic diagram of the knuckle casting process of the embodiment of the utility model (sand mold and sand core body are omitted);
[0014] Figure 4 is a schematic diagram of the sand core structure of the embodiment of the utility model;
[0015] Figure 5 is Figure 4 A-A sectional view in the middle;
[0016] Figure 6 is a perspective view of the heating block of the embodiment of the utility model;
[0017] Label explanation in the figure: 100-sand core body, 110-shaft part, 111-groove, 200-heating block, 300-knuckle, 310-tube opening, 400-first riser, 500-second riser. DETAILED DESCRIPTION
[0018] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0019] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component and / or combinations thereof.
[0020] As shown in Figures 1-6 A knuckle tube opening forming sand core structure with feeding function, comprising a sand core body 100, the sand core body 100 is provided with a shaft part 110 for forming a knuckle tube opening, and a heating block 200 is embedded on one side of the shaft part. The utility model increases the heating block on the sand core, and the cooling speed of the heating block is slower after being heated by molten iron, and the temperature drop speed is slower than the surrounding shaft part of the sand core, which can continuously supply heat to the molten iron at this position for a period of time, thereby improving the feeding capacity of the molten iron and improving the shrinkage hole problem.
[0021] In the embodiment, the shaft part side of the sand core body 100 is provided with a groove 111 for embedding the heat block.
[0022] In the embodiment, the outward side surface of the heat block is an arc surface, the radius of the arc surface is the same as the radius of the shaft part, and the arc surface is flush with the surface of the shaft part.
[0023] In the embodiment, the heat block is made of thermite.
[0024] In the embodiment, the length of the heat block is 7-10 cm, the width is 2-3 cm, and the thickness is 1-2 cm.
[0025] Any of the technical solutions disclosed in the utility model, if not otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range, any person skilled in the art should understand that: the preferred numerical range is only one of the many implementable values, the technical effect is more obvious or representative. Because there are too many values, it is impossible to enumerate, therefore, the utility model discloses only part of the values to illustrate the technical solutions of the utility model, and the enumerated values should not constitute the limitation of the protection scope of the utility model.
[0026] If the utility model discloses or involves mutually fixed connecting parts or structural members, except otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, bolt or screw connection), and can also be understood as: non-detachable fixed connection (for example, riveting, welding), of course, the mutually fixed connection can also be replaced by an integral structure (for example, integrally formed by using casting process) (except that integrally formed process is obviously unavailable).
[0027] In addition, the terms used to represent the position relationship or shape in any of the technical solutions disclosed in the utility model, except otherwise stated, the meaning includes the approximate, similar or close state or shape.
[0028] Any of the components provided by the utility model can be assembled by a plurality of individual components, or can be an individual component manufactured by an integral forming process.
[0029] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application, and in accordance with the technical essence of the present application, still belong to the protection scope of the technical solution of the present application.
Claims
1. A knuckle pipe port forming sand core structure having a feeding function, characterized by: The application relates to a sand core body provided with an axle part for forming a knuckle pipe orifice, wherein a heating block is embedded on one side of the axle part; a groove for embedding the heating block is arranged on one side of the axle part of the sand core body; the outer side surface of the heating block is an arc surface, the radius of the arc surface is the same as that of the axle part, and the arc surface is flush with the surface of the axle part.
2. The knuckle pipe port forming sand core structure with a feeding function according to claim 1, characterized in that: The heating block is made of an aluminothermic agent.
3. The knuckle pipe port forming sand core structure having a feeding function according to claim 1, characterized in that: The length of the heating block is 7-10 cm, the width is 2-3 cm, and the thickness is 1-2 cm.