Turbine blade wax mould pressing wax mould
By adopting a track groove + sliding pin connection structure in the turbine blade wax mold, the problem of increased mold length and weight was solved, achieving lightweight mold and efficient mold opening and closing.
Patent Information
- Application Number
- CN202423038443.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-10
AI Technical Summary
When the center diameter of the arc surface of the blade is large, the existing turbine blade wax mold has increased length and weight, resulting in a complex structure and exceeding the travel limit of machining equipment.
The hinge structure is replaced by a track groove + sliding pin connection structure. The sliding pin and the arc track groove are matched and slidably assembled. The arc surface of the arc track groove is concentric with the arc surface of the blade mold cavity edge plate. The sliding pin achieves rapid mold opening and closing through the bending section.
It effectively reduces mold length, lightens weight, improves mold opening and closing efficiency, and reduces equipment requirements.
Smart Images
Figure CN223531369U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of investment casting technology, and in particular relates to a wax mold for turbine blades. Background Technology
[0002] In the fabrication of turbine blade investment molds, since most of the blade's rim, upper and lower flow channels, and schenes are obtained by rotating a single cross-section around the turbine disk axis, when a hinged ejection mold is used, the rotation center of the wax mold coincides with the center of the arc surface of the rim of the blade mold cavity. This results in a relatively simple mold structure. Figure 1 As shown. When using a hinged ejection mechanism, generally speaking, the rotation center of the upper mold around the lower mold coincides with the center of the blade rim arc surface, and there is no problem using a connecting rod to fix the rotation; however, when the diameter of the rim arc surface center is large, problems such as increased mold length, increased weight, complex structure, exceeding the stroke of machining equipment, and exceeding the stroke of the pressure wax machine will occur, for example... Figure 2 As shown (mold closed state). Summary of the Invention
[0003] The main purpose of this utility model is to provide a turbine blade wax mold for pressing wax, which aims to effectively reduce the mold length and weight.
[0004] To address this, the present invention provides a turbine blade wax mold pressing die, comprising an upper mold and a lower mold, wherein a blade mold cavity is formed between the upper mold and the lower mold, and one end of the upper mold and the lower mold are rotatably connected by a connecting structure, wherein the connecting structure includes an arc track groove fixedly disposed on the lower mold and a sliding pin disposed on the upper mold and slidably assembled with the arc track groove, wherein the arc surface of the arc track groove is concentric with the arc surface of the edge plate of the blade mold cavity.
[0005] Specifically, the upper end of the arc track groove bends inward toward its center.
[0006] Specifically, the lower mold is provided with two sliding pins arranged along the arc track groove.
[0007] Specifically, the sliding pin is a bearing, and the bearing's shaft is fixedly connected to the upper mold.
[0008] Compared with the prior art, the present invention has the following advantages: by modifying the connection structure between the upper mold and the lower mold from the original hinge structure to a track groove + sliding pin connection structure, the mold length can be reduced and the weight can be reduced. Attached Figure Description
[0009] To more clearly illustrate the technical solutions in 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.
[0010] Figure 1 This is a schematic diagram of the assembly of turbine blades and turbine disk;
[0011] Figure 2 This is a schematic diagram of the existing turbine blade wax mold pressing die structure;
[0012] Figure 3 This is a schematic diagram of the mold closing mechanism for a turbine blade wax mold according to an embodiment of this utility model;
[0013] Figure 4 This is a schematic diagram of the mold opening of the turbine blade wax mold according to an embodiment of this utility model;
[0014] Among them: 1. Upper mold; 2. Lower mold; 3. Connecting structure; 301. Circular arc track groove; 302. Sliding pin; 4. Bending section. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0018] See Figure 3 and Figure 4 A turbine blade wax mold includes an upper mold 1 and a lower mold 2. A blade mold cavity is formed between the upper mold 1 and the lower mold 2. One end of the upper mold 1 and the lower mold 2 are rotatably connected by a connecting structure 3. The connecting structure 3 includes an arc track groove 301 fixedly disposed on the lower mold 2 and a sliding pin 302 disposed on the upper mold 1 and slidably assembled with the arc track groove 301. The upper mold 1 can be rotated to open or close in the vertical plane relative to the lower mold 2, thereby realizing the opening and closing of the mold. The sliding pin 302 slides along the arc track groove 301. The arc surface of the arc track groove 301 is concentric with the arc surface of the blade mold cavity, that is, the arc surface of the arc track groove 301 is located on a concentric circle concentric with the arc surface of the blade mold cavity and is disposed close to the side of the blade mold cavity.
[0019] In this embodiment, by modifying the connection structure 3 between the upper mold 1 and the lower mold 2 from the original hinge structure to a connection structure of track groove + sliding pin 302, the mold length is effectively reduced and the weight is effectively reduced.
[0020] See Figure 3 and Figure 4 Specifically, the upper end of the arc track groove 301 bends inward toward its center, forming a bent section 4. This structure allows the sliding pin 302 to engage with the bent section 4 along the arc track groove 301 after the upper mold 1 opens relative to the lower mold 2 at a set angle, quickly opening the mold and facilitating the removal of the blade wax piece. As for the curvature of the arc track groove 301, those skilled in the art can adapt it according to the specific angle the upper mold 1 needs to open. In this embodiment, the curvature of the arc track groove 301 is 3 degrees, and its diameter is 329 mm. The bent section 4 is also designed as an arc, with an angle of 50 degrees and a diameter of 42 mm. The bent section 4 is smoothly connected to the arc track groove 301. When the mold opens, it first rotates counterclockwise by 3 degrees along the arc center of the blade edge plate. At this point, the upper mold 1 is completely separated from the blade wax piece. After separation, it slides into the bent section 4 along the arc track groove 301 and rotates 50 degrees to easily remove the blade wax piece.
[0021] Specifically, to effectively ensure the accuracy of mold opening and closing, the lower mold 2 can be provided with two sliding pins 302 arranged along the arc track groove 301. The sliding pins 302 can be bearings, and the bearing shaft is fixedly connected to the upper mold 1. This design can reduce friction and wear, and ensure the smooth and efficient movement of the connecting structure 3.
[0022] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Anyone skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values to illustrate the technical solutions of the invention. Furthermore, the numerical values listed above should not constitute a limitation on the scope of protection of this invention.
[0023] Meanwhile, if the present invention discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by casting) (except where it is obviously impossible to use an integral forming process).
[0024] Furthermore, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model include states or shapes that are similar to, analogous to, or close to those states or shapes. Any component provided by this utility model can be assembled from multiple individual components or can be a single component manufactured using a one-piece molding process.
[0025] The above embodiments are merely illustrative examples to clearly illustrate the present invention, and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A turbine blade wax mold pressing mold, comprising an upper mold (1) and a lower mold (2), wherein a blade mold cavity is formed between the upper mold (1) and the lower mold (2), and one end of the upper mold (1) and the lower mold (2) are rotatably connected by a connecting structure (3), characterized in that: The connection structure (3) includes an arc track groove (301) disposed on the lower mold (2) and a sliding pin (302) disposed on the upper mold (1) and slidably assembled with the arc track groove (301). The arc surface of the arc track groove (301) is concentric with the arc surface of the blade mold cavity.
2. The turbine blade wax mold pressing die according to claim 1, characterized in that: The upper end of the arc track groove (301) bends inward toward its center to form a bent section (4).
3. The turbine blade wax mold pressing die according to claim 1 or 2, characterized in that: The lower mold (2) is provided with two sliding pins (302) arranged along the arc track groove (301).
4. The turbine blade wax mold pressing die according to claim 3, characterized in that: The sliding pin (302) is a bearing, and the shaft of the bearing is fixedly connected to the upper mold (1).