Fixing device for CB2 material cylinder airway sand core
The fixed CB2 cylinder airway sand core is solved by fixing the CB2 cylinder channel chamber through a positioning member with a hollow cross-shaped structure, and the dimension control problem of the CB2 cylinder airway chamber is solved, ensuring the accuracy and quality of the airway dimensions of the castings.
Patent Information
- Application Number
- CN202422583409.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-25
AI Technical Summary
The space of the CB2 cylinder channel chamber is small and prone to cracks, resulting in large dimensional deviations and high casting temperature increases shrinkage. The existing fixing methods cannot effectively control the airway size deviation, resulting in excessive castings.
The narrow-side positioning member and long-side positioning member with a hollow cross-shaped structure connect the cylinder airway sand core to the sand box. The airway offset is controlled through the expansion adjustment of the rod to ensure the accurate airway size.
The controllability of the size of the CB2 cylinder channel chamber is achieved, the dimension deviation is reduced, and the quality and consistency of the castings are improved.
Smart Images
Figure CN223300854U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of cylinder casting, in particular to a fixing device for a cylinder airway sand core made of CB2 material. Background Art
[0002] Cylinders made of ZG13Cr9Mo2Co1VNbNB-Ⅱ (CB2) material have a Y-shaped airway chamber with a narrow space, making dimensional deviations extremely difficult to repair. Furthermore, CB2 material is prone to cracking, necessitating higher pouring temperatures. High pouring temperatures increase shrinkage. Previously, Φ10mm iron rods were used to secure the cylinders directly to the flask walls, resulting in significant airway dimensional deviations. This deviation could not be detected, leading to out-of-tolerance airway conditions in cylinder castings. Summary of the Invention
[0003] The technical problem to be solved by the utility model is to provide a fixing device for a cylinder airway sand core made of CB2 material.
[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0005] A fixing device for a cylinder airway sand core made of CB2 material, wherein the tops of the two core heads at the upper end of the cylinder airway sand core are connected to the two side walls of the sand box through a narrow side positioning piece and a long side positioning piece respectively. The narrow side positioning piece and the long side positioning piece have the same structure, and are a hollow cross structure formed by continuously bending the rods, including a symmetrically arranged bottom rod, side rod one, side rod two and top rod, and there are arc transitions between the bottom rod and side rod one, side rod one and side rod two, side rod two and top rod, and the two top rods. The two bottom rods are connected by a cross rod, the cross rod is fixedly connected to the side of the core head, and the end of the top rod is fixedly connected to the sand box.
[0006] The narrow side positioning piece and the long side positioning piece are arranged vertically.
[0007] The end of the push rod is inserted into the sand box to a depth of 60-100 mm.
[0008] The rod is a metal rod.
[0009] The diameter of the rod is 5-8 mm.
[0010] Compared with the existing technology, the beneficial effects of the utility model are:
[0011] This new design ensures the airway chamber dimensions of CB2-material cylinders. The hollow cross-shaped structure offers a certain degree of flexibility, allowing the airway offset dimensions of the product to be determined by varying the center spacing. Pre-deformation is added to the casting airway to ensure that the airway does not deviate. This makes the previously uncertain dimensional deviation manageable, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a structural diagram of the utility model.
[0013] Figure 2 It is a top view of the utility model.
[0014] Figure 3 This is a structural diagram of the narrow side positioning part and the long side positioning part.
[0015] In the figure: cylinder airway sand core 1, narrow side positioning piece 2, long side positioning piece 3, sand box 4, bottom rod 5, side rod 1 6, side rod 2 7, top rod 8, cross rod 9. DETAILED DESCRIPTION
[0016] In the description of this utility model, it should be understood that the terms "first," "second," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means more than two.
[0017] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0018] like Figure 1-Figure 3 , a fixing device for a cylinder airway sand core made of CB2 material, the tops of the two core heads at the upper end of the cylinder airway sand core 1 are connected to the two side walls of the sand box 4 through a narrow side positioning piece 2 and a long side positioning piece 3 respectively, the narrow side positioning piece 2 and the long side positioning piece 3 have the same structure, which is a hollow cross structure formed by continuously bending the rods, including a symmetrically arranged bottom rod 5, side rod 1 6, side rod 2 7 and top rod 8, and there are arc transitions between the bottom rod 5 and side rod 1 6, side rod 1 6 and side rod 2 7, side rod 2 7 and top rod 8, and the two top rods 8. The two bottom rods 5 are connected by a cross rod 9, the cross rod 9 is fixedly connected to the side of the core head, and the end of the top rod 8 is fixedly connected to the sand box 4.
[0019] The narrow side positioning member 2 and the long side positioning member 3 are arranged vertically.
[0020] The end of the push rod 8 penetrates into the sand box 4 to a depth of 60-100 mm.
[0021] The rod is a metal rod.
[0022] The diameter of the rod is 5-8 mm.
[0023] During construction, the "Y-shaped" cylinder airway sand core is placed in the sand box, and the core head and the sand box are respectively connected by the narrow side positioning piece 2 and the long side positioning piece 3, and then welded and fixed. After the pouring is completed and the molten steel solidifies, the product airway offset size is determined by measuring the change in the center space distance of each positioning piece, and the deformation amount is increased in advance at the airway of the casting to ensure that the airway will not deviate.
[0024] To make the purpose, technical solution, and technical effects of the present invention more clearly understood, the technical solutions in the embodiments of the present invention are now described clearly and completely. However, the embodiments described below are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art without inventive effort in conjunction with the embodiments of the present invention are also within the scope of protection of the present invention.
[0025] Example
[0026] A fixing device for a CB2 material cylinder airway sand core. The tops of the two core heads at the upper end of the cylinder airway sand core 1 are connected to the two side walls of a sand box 4 via a narrow side positioning member 2 and a long side positioning member 3, respectively. The narrow side positioning member 2 and the long side positioning member 3 are arranged vertically. The narrow side positioning member 2 and the long side positioning member 3 have the same structure, and are hollow cross-shaped structures formed by continuously bending Φ6mm iron bars. They include a symmetrically arranged bottom rod 5, side rod 1 6, side rod 2 7, and top rod 8. The bottom rod 5 and side rod 1 6, side rod 1 6 and side rod 2 7, side rod 2 7 and top rod 8, and the two top rods 8 all have arc transitions. The two bottom rods 5 are connected by a cross bar 9, which is fixedly connected to the side of the core head. The end of the top rod 8 is fixedly connected to the sand box 4. The end of the top rod 8 of the narrow side positioning member 2 protrudes into the sand box 4 to a depth of 70mm, and the end of the top rod 8 of the long side positioning member 3 protrudes into the sand box 4 to a depth of 60mm.
[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and basic spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A fixing device for a CB2 material cylinder airway sand core, characterized in that: The tops of the two core heads at the upper end of the cylinder airway sand core are respectively connected to the two side walls of the sand box through a narrow side positioning piece and a long side positioning piece. The structures of the narrow side positioning piece and the long side positioning piece are consistent. They are a hollow cross structure formed by continuously bending the rods, including a symmetrically arranged bottom rod, side rod one, side rod two and top rod. There are arc transitions between the bottom rod and side rod one, side rod one and side rod two, side rod two and top rod, and the two top rods. The two bottom rods are connected by a cross rod, the cross rod is fixedly connected to the side of the core head, and the end of the top rod is fixedly connected to the sand box.
2. The fixing device for a CB2 material cylinder airway sand core according to claim 1, characterized in that: The narrow side positioning piece and the long side positioning piece are arranged vertically.
3. The fixing device for a CB2 material cylinder airway sand core according to claim 1, characterized in that: The end of the push rod is inserted into the sand box to a depth of 60-100 mm.
4. The fixing device for a CB2 material cylinder airway sand core according to claim 1, characterized in that: The rod is a metal rod.
5. The fixing device for a CB2 material cylinder airway sand core according to claim 1, characterized in that: The diameter of the rod is 5-8 mm.