Transfer tool for investment casting of complex structural parts

Abstract

The utility model relates to the field of transfer tools, in particular to a transfer tool for investment casting of complex structural parts, which comprises a bottom plate, a plurality of through holes are arranged on the bottom plate, a support part is arranged on the bottom surface of the bottom plate, and the bottom plate and the support part are integrally cast by high-temperature alloy. An exhaust assembly is arranged on the upper surface of the bottom plate; the through holes are formed in the bottom plate, the weight of the transfer tool can be reduced, high-temperature alloy casting is adopted, the service life is prolonged, the arranged exhaust assembly is matched with the through holes in the bottom plate, the air convection speed of the bottom of a casting is increased, heat dissipation of the casting is facilitated, sequential solidification of the casting is facilitated, and the defects of shrinkage porosity and shrinkage cavities are overcome.

Description

Technical Field

[0001] The utility model relates to the field of transfer tooling, in particular to a transfer tooling for investment casting of complex structural parts. Background Art

[0002] Vacuum pouring is generally used for the melting and pouring of complex structural parts. Before pouring the product, it is generally necessary to heat it in a roasting furnace for a period of time. After reaching a certain temperature point, it is transferred to a vacuum melting furnace for pouring with tools. The diameter of the casting exceeds 1 meter, and the wall thickness is thin. The pouring system is complex, and the time of mold transfer must be precisely controlled to avoid excessive transfer time causing the mold to cool down and cause key thermophysical parameters to deviate from theoretical requirements.

[0003] The prior art is to use a tooling with a similar structure to the mold shell to transfer the mold shell, heat it together with the mold shell in a roasting furnace, and then transfer it to a vacuum melting furnace for pouring after it reaches temperature. The existing mold shell transfer tooling is generally made of cast iron or cast steel. As the mold shell is roasted for a long time, it is easy to deform and oxidize, and its service life is short. Since the tooling needs to be heated together with the mold shell, the heat of the tooling itself will affect the heat dissipation of the casting, destroy the sequential solidification of the molten metal, and easily cause the casting to have shrinkage defects such as porosity and shrinkage cavities. For this reason, the present application proposes a transfer tooling for investment casting of complex structural parts to solve the above problems. Utility Model Content

[0004] In view of the existing problems, the utility model provides a transfer tool for investment casting of complex structural parts, which can effectively solve the problems raised in the background technology.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A transfer tool for investment casting of complex structural parts, the transfer tool comprising a base plate, a plurality of through holes are opened on the base plate, a support member is provided on the bottom surface of the base plate, and the base plate and the support member are integrally cast using a high-temperature alloy, and an exhaust assembly is provided on the upper surface of the base plate.

[0007] As a further solution of the utility model: the bottom plate is a circular disc structure.

[0008] As a further solution of the utility model: the number of the supporting members is five, and the supporting members are frame-shaped structures.

[0009] As a further solution of the utility model: anti-deformation ribs are arranged on the upper surface of the outer edge of the bottom plate.

[0010] As a further solution of the utility model: a stress relief notch is provided on the outer periphery of the bottom plate.

[0011] As a further solution of the utility model: the number of the stress release notches is four and they are distributed in a circular pattern.

[0012] As a further solution of the utility model: the exhaust assembly includes a circular ring pipe and a ventilation pipe, the circular ring pipe is fixedly connected to the bottom plate, the ventilation pipe is communicated with the circular ring pipe, and the circular ring pipe is provided with a plurality of air outlet heads.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model can reduce the weight of the transfer tooling by setting through holes on the bottom plate, and adopts high-temperature alloy casting to improve the service life; the exhaust assembly set in conjunction with the through holes on the bottom plate improves the air convection speed at the bottom of the casting, facilitates the heat dissipation of the casting, is beneficial to the sequential solidification of the casting, and reduces the defects of shrinkage and shrinkage cavities. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the overall structure of a transfer tooling for investment casting of complex structural parts;

[0015] Figure 2 It is a schematic diagram of the overall structure of a transfer tooling for investment casting of complex structural parts;

[0016] Figure 3 This is a three-dimensional schematic diagram from another perspective of the overall structure of a transfer tooling for investment casting of a complex structural part.

[0017] In the figure: 1. bottom plate; 2. through hole; 3. support member; 4. anti-deformation rib; 5. stress release notch; 6. circular ring tube; 7. ventilation pipe; 8. air outlet head. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Combination Figures 1 to 3The present embodiment is described. The present embodiment provides a transfer tool for investment casting of complex structural parts. The transfer tool includes a base plate 1. The base plate 1 is a circular disc-shaped structure. A plurality of through holes 2 are opened on the base plate 1. The through holes 2 are arranged on the base plate 1. Support members 3 are provided on the bottom surface of the base plate 1. There are five support members 3. The support members 3 are frame-shaped structures. One of the support members 3 is provided in the middle of the base plate 1 and is a circular frame structure. The remaining four support members 3 are arranged around the support member 3 in the middle. The remaining four support members 3 are rectangular frame structures. The base plate 1 and the support members 3 are integrally cast with high-temperature alloy. An exhaust assembly is provided on the upper surface of the base plate 1.

[0020] In addition, anti-deformation ribs 4 are arranged on the upper surface of the outer edge of the bottom plate 1. The anti-deformation ribs 4 are integrally arranged with the bottom plate 1 and protrude from the surface of the bottom plate 1, thereby enhancing the anti-deformation ability of the bottom plate 1. At the same time, stress release notches 5 are arranged on the outer periphery of the bottom plate 1. There are four stress release notches 5 and they are distributed in a circle, which can provide stress release buffer during the heating process.

[0021] The exhaust assembly includes an annular tube 6 and a vent pipe 7. The annular tube 6 is fixedly connected to the base plate 1. The vent pipe 7 is communicated with the annular tube 6. A plurality of air outlets 8 are provided on the annular tube 6. The vent pipe 7 is connected to an air compressor. Compressed air is input into the vent pipe 7 and discharged through the air outlets 8, thereby accelerating the air convection speed at the bottom of the casting.

[0022] The working principle of the utility model is: when actually used, the bottom plate 1 of the tooling is placed upward, the mold shell is placed in the center of the bottom plate 1, the tooling is lifted up by a forklift, and the whole is transferred to the roasting furnace. After the mold shell reaches the temperature, the tooling is lifted up by a forklift, and transferred together with the mold shell to the vacuum melting furnace for pouring. The whole process is smooth and fast. After the pouring is completed, compressed air is connected to the tooling for ventilation to accelerate the air convection at the bottom of the casting. The compressed air blown out of the blowing port 8 and the through hole 2 on the bottom plate 1 form convection heat exchange, thereby accelerating the heat dissipation of the casting. By setting the through hole 2 on the bottom plate 1, the weight of the transfer tooling can be reduced, and the high-temperature alloy casting is used to increase the service life. The exhaust assembly provided cooperates with the through hole on the bottom plate to increase the air convection speed at the bottom of the mold shell, which is convenient for the heat dissipation of the casting, and is conducive to the sequential solidification of the casting, and reduces the defects of shrinkage and shrinkage cavities.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transfer tool for investment casting of complex structural parts, characterized in that: The transfer tooling comprises a bottom plate, a plurality of through holes are formed on the bottom plate, a support is provided on the bottom surface of the bottom plate, and the bottom plate and the support are integrally cast by high-temperature alloy, and an exhaust assembly is provided on the upper surface of the bottom plate.

2. A transfer tool for investment casting of complex structural parts according to claim 1, characterized in that: The bottom plate is a circular disc structure.

3. A transfer tool for investment casting of complex structural parts according to claim 1, characterized in that: The number of the supporting members is five, and each supporting member is a frame-shaped structure.

4. A transfer tool for investment casting of complex structural parts according to claim 1, characterized in that: Anti-deformation ribs are arranged on the upper surface of the outer edge of the bottom plate.

5. The transfer tool for complex structural parts investment casting according to claim 1, characterized in that: A stress relief notch is arranged on the outer periphery of the bottom plate.

6. A transfer tool for investment casting of complex structural parts according to claim 5, characterized in that: The stress release notches are arranged in four and are distributed in a circumference.

7. The transfer tool for complex structural parts investment casting according to claim 1, characterized in that: The exhaust assembly comprises a circular ring pipe and a vent pipe, the circular ring pipe is fixedly connected to the bottom plate, the vent pipe is communicated with the circular ring pipe, and the circular ring pipe is provided with a plurality of air outlets.

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