Novel pump body fired mold structure

Abstract

The utility model relates to a novel pump body fired mold structure, which is characterized in that a wax mold splitting mold of the pump body fired mold structure divides the pump body fired mold structure into three parts, namely a first wax mold with a volute outer ring section, an inlet nozzle, an outlet nozzle part and an outlet flange, and a second wax mold with a volute outer ring section, a volute inner ring and an outlet nozzle part, the second wax mould is used as a first wax mould, the independently-formed inlet flange is used as a second wax mould, the independently-formed inlet flange is used as a third wax mould, so that the volute body is divided into an inner ring and an outer ring, and the outlet mouth parts which are mutually closed to form the outlet mouth are also included, so that during mould closing, the second wax mould is embedded into the first wax mould. The method has the advantages of simple steps, convenience in operation, no need of a wax piece bonding tool for wax piece bonding, stable size, smooth wax piece surface, high bonding efficiency, small casting appearance polishing amount and better casting appearance when the pump body wax mold for mold closing is used for casting, and the positions of required red wax are few, so that the length of the wax piece bonding red wax is greatly reduced. The method has the advantages of simple steps, convenience in operation, no wax piece bonding tool, stable size, smooth wax piece surface and high bonding efficiency.

Description

[Technical field]

[0001] The utility model relates to the field of pump body structures, in particular to a novel pump body investment mold structure. [Background technology]

[0002] Investment casting, also known as lost wax casting, can produce castings with high dimensional accuracy, high surface finish and complex shapes, such as advanced hollow blades for aircraft engines. The inner cavity of investment casting is generally formed along with the outer shape through repeated slurry dipping, sand pouring, drying and other methods. When the inner cavity of the casting is too small, complex or difficult to dry, it must be formed with the help of a pre-prepared core.

[0003] For example, some pump parts are generally precision casted using investment casting core production technology. For example, the patent with publication number CN109894575B discloses a turbocharger volute and pump parts investment casting core production process. The technical solution elaborates on this process in detail. In this process, wax mold manufacturing is a very important content, which determines the quality of the casting. With the continuous development of science and technology, the application of 3D scanning detection technology has become more and more mature. 3D scanning detection methods have been used for parts detection. If you want to improve product quality, you must improve the quality of wax molds.

[0004] When manufacturing the wax mold, it is necessary to split the mold and manufacture the wax mold according to the pump type of the pump body, and then glue the separated wax molds together to obtain the pump body wax mold. The pump body wax mold generally includes a volute body, an outlet section and an inlet section. The outlet section includes an outlet nozzle and an outlet flange, and the inlet section includes an inlet nozzle and an inlet flange. The existing pump body wax mold splitting usually takes the inlet flange as a separate wax mold, and then cuts the remaining part according to the central axis plane of the outlet flange to divide it into two wax molds.

[0005] During many years of casting production, the applicant discovered that there were problems with the existing parting method of the pump body wax mold. Through 3D simulation and wax part bonding, it was found that: affected by the structure and mold, the bonding of wax parts requires the cooperation of tooling to ensure the total height, there are many steps, the operation is not smooth, the bonding is time-consuming, the wax parts have cloaks that are difficult to remove, the flash is serious, and the bonding parts need to be touched with red wax, which is time-consuming. The appearance quality of the wax parts is poor and the production efficiency is low.

[0006] Therefore, we need to redesign the wax mold splitting of the pump body to improve the quality of the wax mold, thereby improving the quality of the cast pump body.

[0007] To solve the above problems, we provide a solution. [Contents of the utility model]

[0008] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a new pump body investment mold structure, and the technical solution adopted is:

[0009] A novel pump body investment mold structure includes a first wax mold, a second wax mold and a third wax mold, wherein the first wax mold includes an outer ring segment of a volute body, an inlet nozzle, an outlet nozzle part and an outlet flange, and the second wax mold includes an outer ring segment of a volute body, an inner ring of a volute body and an outlet nozzle part, and the second wax mold can be bonded to the first wax mold to form a volute body and an outlet nozzle, wherein the outer ring segment of the volute body on the first wax mold and the outer ring segment of the volute body on the second wax mold constitute the outer ring of the volute body, and the outlet nozzle part on the first wax mold and the outlet nozzle part on the second wax mold constitute the outlet nozzle; the third wax mold includes an inlet flange, and the inlet flange can be bonded to the inlet nozzle to form an inlet section.

[0010] According to a novel pump body investment mold structure of an embodiment of the utility model, the volute housing includes a volute housing outer ring and a volute housing inner ring, and the volute housing inner ring is embedded and bonded to the inner wall of the volute housing outer ring.

[0011] According to a novel pump body investment mold structure of an embodiment of the utility model, the outer ring of the volute body has multiple outer ring walls with different wall thicknesses in its circumferential direction; the inner ring of the volute body has multiple outer ring walls with different wall thicknesses in its circumferential direction.

[0012] According to a novel pump body investment mold structure of an embodiment of the utility model, the outer ring segment of the volute housing on the second wax mold is a ring segment where the outer ring of the volute housing is in close contact with the outlet nozzle.

[0013] According to a novel pump body investment mold structure of an embodiment of the utility model, the outlet nozzle portion on the second wax mold includes at least a portion of the upper layer of the outlet nozzle.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, the wax mold of the pump body investment mold structure is divided into three parts: a first wax mold having an outer ring segment of the vortex body, an inlet nozzle, an outlet nozzle part and an outlet flange, a second wax mold having an outer ring segment of the vortex body, an inner ring of the vortex body and an outlet nozzle part, and an independently formed inlet flange as a third wax mold, thereby dividing the vortex body into an inner ring and an outer ring, and also including an outlet nozzle part that is closed together to form an outlet nozzle, so that when the mold is closed, the second wax mold can be embedded into the first wax mold. Compared with the traditional wax mold splitting method, the wax parts are bonded with the red wax with fewer gaps and the positions that need to be touched with the red wax are fewer, which greatly reduces the length of the wax parts bonding with the red wax, has simple steps and is easy to operate. The wax parts bonding does not require wax parts bonding tooling, and has stable dimensions, a smooth wax parts surface and high bonding efficiency. The pump body wax mold that is closed is used for casting, and the casting has less polishing on the appearance and better appearance.

Brief Description of the Drawings

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 A three-dimensional schematic diagram of an embodiment of the utility model Figure 1 ;

[0018] Figure 2 A three-dimensional schematic diagram of an embodiment of the utility model Figure 2 ;

[0019] Figure 3 The mold splitting diagram of the embodiment of the utility model is shown in FIG. Figure 1 ;

[0020] Figure 4 Schematic diagram of the mold splitting of the embodiment of the utility model Figure 2 ;

[0021] Figure 5 The mold splitting diagram of the embodiment of the utility model is shown in FIG. Figure 3 .

[0022] Description of main component symbols:

[0023] 10. Volute casing outer ring; 11. Volute casing outer ring segment; 20. Inlet nozzle; 30. Outlet nozzle part; 40. Outlet flange; 50. Volute casing inner ring; 60. Inlet flange. [Specific implementation method]

[0024] The embodiments of the present invention are described in detail below. The embodiments are shown in the accompanying drawings, wherein the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.

[0025] The orientation shown in the drawings cannot be understood as limiting the specific protection scope of the present utility model, and is only provided for reference and understanding of the preferred embodiments. The product components shown in the drawings may be changed in position, increased in number, or simplified in structure.

[0026] The "connection" described in the specification and the mutual "connection" relationship of the components shown in the drawings can be understood as a fixed connection or a detachable connection or an integral connection; it can be a direct connection or a connection through an intermediate medium. Ordinary technicians in this field can understand the connection relationship according to the specific circumstances and can derive different implementation methods in an appropriate manner such as screwing, riveting, welding, clamping or embedding.

[0027] With respect to the directional words such as up, down, left, right, top, bottom, etc. described in the specification and the directions shown in the drawings, the components may be in direct contact or in contact through other features between them; for example, "above" may mean directly above or obliquely above, or it simply means higher than other objects; other directions may be understood by analogy.

[0028] The materials for making parts with solid shapes shown in the specification and drawings may be metal materials, non-metal materials or other synthetic materials; the mechanical processing techniques used for parts with solid shapes may be stamping, forging, wire cutting, laser cutting, casting, injection molding, CNC milling, 3D printing, machining, etc.; ordinary technicians in this field can adaptively select or combine them according to different processing conditions, costs, and precisions, but are not limited to the above-mentioned materials and manufacturing processes.

[0029] The utility model provides a new pump body investment mold structure, such as Figures 1 to 5 As shown, it includes a first wax mold, a second wax mold and a third wax mold, the first wax mold includes a volute body outer ring segment 11, an inlet nozzle 20, an outlet nozzle part 30 and an outlet flange 40, the second wax mold includes a volute body outer ring segment 11, a volute body inner ring 50 and an outlet nozzle part 30, the second wax mold can be bonded to the first wax mold to form a volute body and an outlet nozzle, wherein the volute body outer ring segment 11 on the first wax mold and the volute body outer ring segment 11 on the second wax mold constitute the volute body outer ring 10, the outlet nozzle part 30 on the first wax mold and the outlet nozzle part 30 on the second wax mold constitute the outlet nozzle; the third wax mold includes an inlet flange 60, and the inlet flange 60 can be bonded to the inlet nozzle 20 to form an inlet section.

[0030] In the present invention, the wax mold of the pump body investment mold structure is divided into three parts: a first wax mold having an outer ring segment 11 of the volute body, an inlet nozzle 20, an outlet nozzle part 30 and an outlet flange 40, a second wax mold having an outer ring segment 11 of the volute body, an inner ring 50 of the volute body and an outlet nozzle part 30, and an independently formed inlet flange 60 as a third wax mold, so that the volute body is divided into an inner ring and an outer ring, and also includes the outlet nozzle part 30 that is closed together to form an outlet nozzle, so that when the mold is closed, the second wax mold can be embedded into the first wax mold. Compared with the traditional wax mold splitting method, the wax parts are bonded with the red wax with fewer gaps, and the positions that need to be touched with the red wax are fewer, which greatly reduces the length of the wax parts bonding and touching the red wax, the steps are simple, the operation is convenient, the wax parts bonding does not require wax parts bonding tooling, and the size is stable, the wax parts have a smooth surface, and the bonding efficiency is high. The pump body wax mold that is closed is used for casting, and the casting appearance requires less polishing and the casting appearance is better.

[0031] Further, in some embodiments of the present utility model application, such as Figures 1 to 5 As shown, the volute housing includes a volute housing outer ring 10 and a volute housing inner ring 50 , and the volute housing inner ring 50 is embedded and bonded to the inner wall of the volute housing outer ring 10 .

[0032] Further, in some embodiments of the present utility model application, such as Figures 1 to 5As shown, the volute housing outer ring 10 has multiple outer ring walls with different wall thicknesses in its circumferential direction; the volute housing inner ring 50 has multiple outer ring walls with different wall thicknesses in its circumferential direction, so that the two are subjected to mutual force after being fitted together, and the quality of the volute housing wax mold is stable.

[0033] Further, in some embodiments of the present utility model application, such as Figures 1 to 5 As shown, the volute housing outer ring segment 11 on the second wax mold is the ring segment where the volute housing outer ring 10 is in close contact with the outlet nozzle, so that it is convenient for it to be integrally connected with the outlet nozzle part 30 and integrally embedded.

[0034] Further, in some embodiments of the present utility model application, such as Figures 1 to 5 As shown, the outlet nozzle portion 30 on the second wax mold includes at least a portion of the outlet nozzle upper layer, and in the embodiment, is one side wall of the outlet nozzle upper layer.

[0035] Although the utility model is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications can be made to the utility model without departing from the principle and spirit of the utility model defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the utility model, but the scope of protection is limited by the content of the claims.

Claims

1. A new type of pump body investment mold structure, characterized in that: The invention comprises a first wax mold, a second wax mold and a third wax mold, wherein the first wax mold comprises a volute body outer ring segment (11), an inlet nozzle (20), an outlet nozzle part (30) and an outlet flange (40), and the second wax mold comprises a volute body outer ring segment (11), a volute body inner ring (50) and an outlet nozzle part (30). The second wax mold can be bonded to the first wax mold to form a volute body and an outlet nozzle, wherein the volute body outer ring segment (11) on the first wax mold and the volute body outer ring segment (11) on the second wax mold constitute the volute body outer ring (10), and the outlet nozzle part (30) on the first wax mold and the outlet nozzle part (30) on the second wax mold constitute the outlet nozzle; the third wax mold comprises an inlet flange (60), and the inlet flange (60) can be bonded to the inlet nozzle (20) to form an inlet section.

2. A new type of pump body investment mold structure according to claim 1, characterized in that: The volute housing comprises a volute housing outer ring (10) and a volute housing inner ring (50), and the volute housing inner ring (50) is embedded and bonded to the inner wall of the volute housing outer ring (10).

3. A new type of pump body investment mold structure according to claim 2, characterized in that: The volute housing outer ring (10) has a plurality of outer ring walls with different wall thicknesses in its circumferential direction; and the volute housing inner ring (50) has a plurality of outer ring walls with different wall thicknesses in its circumferential direction.

4. A new type of pump body investment mold structure according to claim 1, characterized in that: The volute casing outer ring segment (11) on the second wax model is a ring segment where the volute casing outer ring (10) is in close contact with the outlet nozzle.

5. A new type of pump body investment mold structure according to claim 1, characterized in that: The outlet nozzle portion (30) on the second wax mold includes at least a portion of the outlet nozzle upper layer.

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