Assembly mold pouring gate for preventing deformation of thin-wall blade

Abstract

The utility model relates to the technical field of casting, in particular to a group mould pouring gate for preventing deformation of a thin-wall blade, which comprises a transverse pouring gate, the transverse pouring gate consists of at least four arc-shaped sub pouring gates, the sub pouring gates are arranged at equal intervals to form a circular ring shape, and a gap is arranged between every two adjacent sub pouring gates; the outer contour of the section of the sub-pouring gate is quadrilateral, and the lower surface of the sub-pouring gate is positioned in the horizontal direction; the transverse pouring gate is divided into the four arc sub pouring gates, so that excessive blade wax molds are prevented from being connected to one runner, the distance between the transverse pouring gate and the base plate is not smaller than the height of the blade wax molds, the blade wax molds do not need to be hard pushed when the wax molds are assembled, deformation of the wax molds is prevented, and the product size precision is guaranteed; the blade wax mould can better bear transverse force and shearing force, is not easy to bend under the stress of the structure, improves the stability of the wax mould, reduces the condition that the wax mould is impacted and deformed in the moving process, and thus reduces the possibility of size deformation of the blade wax mould.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a casting mold shell. Background Art

[0002] The application of directional blades in aeroengines is becoming more and more extensive, and among them, the crowned thin-walled blade is the future development trend.

[0003] In the process of producing crowned thin-walled blades, it is necessary to first fix the bottom of the blade wax mold on the chassis of the mold, and then press the top of the blade wax mold against the transverse runner of the mold. However, the existing transverse runner is an annular runner in the shape of a circle, and the bottom surface is arc-shaped, which results in a small contact area between the blade wax mold and the runner. In order to fix the blade wax mold firmly, it is often designed that the distance from the transverse runner to the chassis is slightly less than the height of the blade wax mold, and the blade wax mold is pushed hard to the lowest part of the annular runner. This will cause the wax mold to be easily deformed, resulting in the deformation of the final product. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and the title of the specification of this application, to avoid obscuring the purpose of this part, the abstract, and the title of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] In view of the problems existing in the above-mentioned prior art, the present utility model is proposed.

[0006] To solve the above technical problems, the present utility model provides the following technical solutions:

[0007] A mold assembling runner for preventing deformation of thin-walled blades, comprising a transverse runner, wherein the transverse runner is composed of at least four sub-runners in an arc shape, and the sub-runners are arranged at equal intervals in a circular ring shape, and a gap is provided between two adjacent sub-runners;

[0008] The outer contour of the cross-section of the sub-runner is in a quadrilateral shape, and the lower surface of the sub-runner is in the horizontal direction.

[0009] With the above design, by dividing the transverse runner into four arc-shaped sub-runners, it is avoided that too many blade wax molds are connected to one runner. The distance from the transverse runner to the chassis does not need to be less than the height of the blade wax mold, so that the blade wax mold does not need to be pushed hard during wax mold assembly, preventing the wax mold from deforming and ensuring the dimensional accuracy of the product. Secondly, the outer contour of the cross-section of the sub-runner is in a quadrilateral shape, and the square structure can better bear the transverse force and shear force, and the structure is not easily bent under force, improving the stability of the wax mold and reducing the situation of the wax mold being deformed by impact during movement, thereby reducing the possibility of the size deformation of the blade wax mold.

[0010] Preferably, it further includes a gate structure, which is located at the center of the transverse runner, and each of the sub-runners is connected to the gate structure through a sprue; the gate structure is located at the center of the transverse runner, so that when the assembled wax mold is poured, the molten metal can uniformly flow into the transverse runner from the gate structure.

[0011] Preferably, the sprue has a square structure; the square sprue has good bending and compressive resistance and is not easily deformed, ensuring the stability of the transverse runner connected to the sprue.

[0012] Preferably, the central axis of the sprue forms an angle of 15-30° with the plane where the transverse runner is located; this improves the bearing capacity of the connecting end of the sprue and also facilitates the flow of the liquid metal in the flow channel formed by the sprue.

[0013] Preferably, the cross-sectional area of the sprue is smaller closer to the sub-runner; this facilitates the flow of the molten metal from the sprue into the transverse runner.

[0014] Preferably, the upper part of the gate structure is in the shape of a flared opening, and the diameter gradually decreases from top to bottom; through the flared gate structure, a flared gate is formed after the wax mold is dewaxed, which is convenient for subsequent casting and molding.

[0015] Preferably, a limiting rod is provided between the gate structure and the sprue. One end of the limiting rod is connected to the upper part of the gate structure in the shape of a flared opening, and the other end of the limiting rod is connected to the part of the sprue close to the sub-runner; the limiting rod and the sprue and the gate structure form a triangular structure, which can increase the stability of the sprue, and further improve the stability of the sub-runner, thereby ensuring that the blade wax mold will not be deformed.

[0016] Preferably, the limiting rod is composed of two sub-rods in an inverted "L" shape, namely the first sub-rod and the second sub-rod. The first sub-rod and the second sub-rod are both composed of a first part in the vertical direction and a second part forming an angle with the first part; the angle between the first part and the second part of the first sub-rod is greater than the angle between the first part and the second part of the second sub-rod; the end of the second part of the first sub-rod is fixedly connected to the gate structure, and the end of the first part of the first sub-rod is located above the sprue and has a gap with the sprue; the end of the second part of the second sub-rod is fixedly connected to the first part of the first sub-rod, and the end of the first part of the second sub-rod is fixedly connected to the sprue and close to the sub-runner; the limiting rod is formed by the connection of the first sub-rod and the second sub-rod, ensuring that the limiting rod will not be easily pulled and deformed, and improving the stability effect of the limiting rod.

[0017] Preferably, the cross-sections of the first sub-bar and the second sub-bar are circular; the overall shapes of the first sub-bar and the second sub-bar with circular cross-sections are uniform and highly isotropic, which can effectively reduce stress concentration.

[0018] Preferably, 3-5 blade wax patterns are abutted under any one of the sub-gates, and the blade wax patterns are arranged at equal intervals; it is ensured that there are not too many blade wax patterns under the sub-gates, which is convenient for the docking of the blade wax patterns and the sub-gates.

[0019] Preferably, there are 3 blade wax patterns abutted under the same sub-gate.

[0020] Preferably, guiding tracks are provided at the positions of the blade wax patterns on the sub-gates, and each guiding track is composed of two strip-shaped protrusions. The distance between the two strip-shaped protrusions is smaller closer to the center of the transverse gate; two strip-shaped protrusions are provided on the sub-gate to improve the stability of each sub-gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings. Among them:

[0022] Figure 1 is a schematic structural diagram of the blade mold and the runner mold of a mold assembly runner for preventing the deformation of thin-walled blades according to an embodiment provided by the present invention;

[0023] Figure 2 is a schematic structural diagram of the sub-gate of a mold assembly runner for preventing the deformation of thin-walled blades according to an embodiment provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the above objects, features and advantages of the present invention more understandable, the following will make a detailed description of the specific embodiments of the present invention with reference to the drawings of the specification.

[0025] Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0026] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0027] Next, the so-called "one embodiment" or "embodiment" herein refers to specific features, structures, or characteristics that may be included in less than one implementation manner of the present utility model. The "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is separate or selectively mutually exclusive with other embodiments.

[0028] Embodiment 1

[0029] Referring to Figure 1 and Figure 2 , a gating system for preventing deformation of thin-walled blades, comprising a transverse runner 1.

[0030] The transverse runner 1 is composed of at least four arc-shaped sub-runners 11, and the sub-runners 11 are arranged at equal intervals in a circular ring shape, and there is a gap between two adjacent sub-runners 11; the outer contour of the cross-section of the sub-runner 11 is quadrilateral, and the lower surface of the sub-runner 11 is in the horizontal direction; by dividing the transverse runner 1 into four arc-shaped sub-runners 11, it is avoided that too many blade wax patterns 5 are connected to one runner, and the distance from the transverse runner 1 to the chassis does not need to be less than the height of the blade wax pattern 5, so that the blade wax pattern 5 does not need to be pushed hard during wax pattern assembly, preventing the wax pattern from deforming, ensuring the product size accuracy. Secondly, the outer contour of the cross-section of the sub-runner 11 is quadrilateral, and the square structure can better bear the transverse force and shear force, and the structure is not easily bent under force, improving the stability of the wax pattern and reducing the possibility of the wax pattern being deformed by impact during movement, thereby reducing the possibility of size deformation of the blade wax pattern 5.

[0031] It further includes a gate structure 2, and the gate structure 2 is located at the center of the transverse runner 1, and each sub-runner 11 is connected to the gate structure 2 through a sprue 3; the gate structure 2 is located at the center of the transverse runner 1, so that when the assembled wax pattern is poured, the molten metal can uniformly flow into the transverse runner 1 from the gate structure 2.

[0032] There are 3 - 5 blade wax patterns 5 abutted against the lower part of any one sub-runner 11, and the blade wax patterns 5 are arranged at equal intervals; ensuring that there are not too many blade wax patterns 5 under the sub-runner 11, which is convenient for the docking of the blade wax pattern 5 and the sub-runner 11.

[0033] There are 3 blade wax patterns 5 abutted against the lower part of the same sub-runner 11.

[0034] The sub-gate 11 is provided with guiding tracks at the location of the blade wax mold 5. Each guiding track is composed of two strip-shaped protrusions. The distance between the two strip-shaped protrusions is smaller closer to the center of the transverse gate 1; two strip-shaped protrusions are arranged on the sub-gate 11 to improve the stability of each sub-gate 11.

[0035] During use, when assembling the wax mold, first bond the main body of the wax mold to the bottom plate of the wax mold with liquid-sealing wax. Then, after fixing all 18 blade wax molds 5 around the wax mold on a wax chassis with liquid-sealing wax, bond one sub-gate 11 to every three blade wax molds 5, and then bond the sub-gate 11 to the wax mold. The upper and lower surfaces of the sub-gate 11 are both flat. In this way, the area of the sub-gate 11 is increased. When lapping with the upper end of the blade wax mold 5, there is no need to move the blade wax mold 5, and the blade wax mold 5 does not need to be stressed, making the assembly of the wax mold convenient and fast. The square structure of the sub-gate 11 can better bear the transverse force and shear force, and the structure is not easily bent when stressed, improving the stability of the wax mold and reducing the situation of impact deformation of the wax mold during movement.

[0036] Embodiment 2

[0037] Refer to Figure 1 , which is the second embodiment of the present utility model. This embodiment is based on the previous embodiment.

[0038] The sprue 3 has a square structure; the square sprue 3 has good bending and compressive resistance and is not easily deformed, ensuring the stability of the transverse gate 1 connected to the sprue 3.

[0039] The central axis of the sprue 3 forms an angle of 15 - 30° with the plane where the transverse gate 1 is located; it improves the bearing capacity of the connection end of the sprue 3 and also facilitates the flow of liquid metal in the flow channel formed by the sprue 3.

[0040] The cross-sectional area of the sprue 3 is smaller closer to the sub-gate 11; it is convenient for the molten metal to flow from the sprue 3 into the transverse gate 1.

[0041] The upper part of the gate structure 2 is in the shape of a flared mouth, and the diameter gradually decreases from top to bottom; through the flared gate structure 2, a flared gate is formed after the wax mold is dewaxed, which is convenient for subsequent casting.

[0042] A limiting rod 4 is provided between the gate structure 2 and the sprue 3. One end of the limiting rod 4 is connected to the upper part of the gate structure 2 in the shape of a flared mouth, and the other end of the limiting rod 4 is connected to the part of the sprue 3 close to the sub-gate 11; the limiting rod 4 and the sprue 3 and the gate structure 2 form a triangular structure, which can increase the stability of the sprue 3, thereby improving the stability of the sub-gate 11, and ensuring that the blade wax mold 5 will not be deformed.

[0043] The limiting rod 4 is composed of two sub-rods in an inverted "L" shape, namely the first sub-rod 41 and the second sub-rod 42. Both the first sub-rod 41 and the second sub-rod 42 are composed of a first part in the vertical direction and a second part at an angle to the first part; the angle between the first part and the second part of the first sub-rod 41 is greater than the angle between the first part and the second part of the second sub-rod 42; the end of the second part of the first sub-rod 41 is fixedly connected to the gate structure 2, and the end of the first part of the first sub-rod 41 is located above the sprue 3 and has a gap with the sprue 3; the end of the second part of the second sub-rod 42 is fixedly connected to the first part of the first sub-rod 41, and the end of the first part of the second sub-rod 42 is fixedly connected to the sprue 3 and is close to the sub-gate 11; the limiting rod 4 is formed by the connection of the first sub-rod 41 and the second sub-rod 42, ensuring that the limiting rod 4 will not be easily pulled and deformed, and improving the stability effect of the limiting rod 4.

[0044] The cross-sections of the first sub-rod 41 and the second sub-rod 42 are circular; the overall shapes of the circular first sub-rod 41 and the second sub-rod 42 are uniform and have strong isotropy, which can effectively reduce stress concentration.

[0045] During use, when assembling the wax mold, first assemble the gate structure 2 on the chassis, then evenly arrange the blade molds around the gate structure 2, then assemble the sub-gate 11, and then connect one end of the sprue 3 around the gate structure 2 and the other end to the sub-gate 11. The central axis of the sprue 3 has an angle of 15° - 30° with the upper and lower planes of the sub-gate 11. The square sprue 3 has good bending and compressive resistance and is not easily deformed, ensuring the stability of the lateral gate 1 connected to the sprue 3. Finally, connect one end of the limiting rod 4 around the horn of the gate structure 2 and the other end to the sprue 3. The connection of the first sub-rod 41 and the second sub-rod 42 forms the limiting rod 4, ensuring that the limiting rod 4 will not be easily pulled and deformed, improving the stability effect of the limiting rod 4, increasing the bearing capacity of the end of the sprue 3 connected to the sub-gate 11, reducing the stress on the blade wax mold 5, and ensuring the dimensional accuracy of the final product.

[0046] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without substantially departing from the novel aspects and advantages of the subject matter described in this application. For example, the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (e.g., temperature, pressure, etc.), installation arrangements, use of materials, changes in color, orientation, etc. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structures that perform the functions described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility model. Therefore, the present utility model is not limited to a particular embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0047] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described, i.e., those features that are not relevant to the currently considered best mode of implementing the present utility model or those features that are not relevant to the implementation of the present utility model.

[0048] It should be understood that in the development of any actual implementation, as in any engineering or design project, a large number of specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without excessive experimentation, the development efforts will be a routine task of design, manufacturing and production.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A mold runner for preventing deformation of thin-walled blades, including a transverse runner, characterized in that: The transverse runner is composed of at least four arc-shaped sub-runners, each sub-runner is arranged in a circular ring at equal intervals, and a gap is provided between two adjacent sub-runners; The outer contour of the cross section of the sub-runner is in a quadrilateral shape, and a lower surface of the sub-runner is located in a horizontal direction.

2. The mold runner for preventing deformation of thin-walled blades according to claim 1, characterized in that: It also includes a gate structure, which is located at the center of the transverse runner, and each of the sub-runners is connected to the gate structure through a straight runner.

3. The mold runner for preventing deformation of thin-walled blades according to claim 2, characterized in that: The central axis of the sprue forms an angle of 15-30° with the surface where the transverse sprue is located.

4. The mold runner for preventing deformation of thin-walled blades according to claim 2, characterized in that: The cross-sectional area of ​​the sprue becomes smaller as it is closer to the sub-sprue.

5. The mold runner for preventing deformation of thin-walled blades according to claim 2, characterized in that: A limiting rod is provided between the gate structure and the sprue, one end of the limiting rod is connected to the trumpet-shaped upper portion of the gate structure, and the other end of the limiting rod is connected to the portion of the sprue close to the sub-sprue.

6. The mold runner for preventing deformation of thin-walled blades according to claim 5, characterized in that: The limit rod is composed of two inverted "L"-shaped sub-rods, namely a first sub-rod and a second sub-rod, and the first sub-rod and the second sub-rod are both composed of a first portion located in the vertical direction and a second portion forming an angle with the first portion; The included angle between the first portion and the second portion of the first sub-rod is greater than the included angle between the first portion and the second portion of the second sub-rod; The end of the second part of the first sub-rod is fixedly connected to the gate structure, and the end of the first part of the first sub-rod is located above the sprue and there is a gap between the end and the sprue; The end of the second part of the second sub-rod is fixedly connected to the first part of the first sub-rod, and the end of the first part of the second sub-rod is fixedly connected to the sprue and close to the sub-sprue.

7. The mold runner for preventing deformation of thin-walled blades according to claim 1, characterized in that: There are 3-5 blade wax models abutting against the bottom of any of the sub-runners, and the blade wax models are arranged at equal intervals.

8. The mold runner for preventing deformation of thin-walled blades according to claim 7, characterized in that: There are three blade wax molds abutting against the lower side of the same sub-sprue.

9. The mold runner for preventing deformation of thin-walled blades according to claim 7, characterized in that: The sub-runner is provided with a guide track at the location of the blade wax model, and each guide track is composed of two strip-shaped protrusions, and the distance between the two strip protrusions is smaller as it is closer to the center of the transverse runner.

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