CN209762450U

CN209762450U - Pipeline that can be self-supporting in vibration material disk manufacturing process

Info

Publication number: CN209762450U
Application number: CN201920107291.2U
Authority: CN
Inventors: 高爱琼; 雍翱伟; 濮睿德
Original assignee: Beijing Nanfang Snecma Turbine Technology Co Ltd
Current assignee: Beijing Nanfang Snecma Turbine Technology Co Ltd
Priority date: 2019-01-22
Filing date: 2019-01-22
Publication date: 2019-12-10
Anticipated expiration: 2029-01-22

Abstract

The utility model relates to a pipeline that can be self-supporting in the vibration material disk manufacturing process, can simplify the manufacturing procedure when the pipe fitting product adopts 3D printing method to prepare, reduce the manufacturing difficulty, and can further reduce the manufacturing cost of pipe fitting product, the cross-sectional figure of pipeline perpendicular to through-flow direction is the quadrangle of which four corners are fillets; when the pipeline is placed on a printing platform, the line-surface angle formed by any side of the quadrangle and the printing platform is smaller than the maximum value of the self-supporting angle of the current material of the pipeline; the radius of the fillet is smaller than the maximum value of the self-supporting diameter of the current material of the pipeline. According to the utility model discloses can reduce the manufacturing degree of difficulty to can further reduce the manufacturing cost of pipe fitting product.

Description

Pipeline that can be self-supporting in vibration material disk manufacturing process

Technical Field

The utility model relates to a vibration material disk makes technical field, especially a pipeline that can be self-supporting in the vibration material disk process.

Background

The pipeline is widely applied to aeroengines. The external oil and gas pipelines of the existing aero-engine are generally round pipes which are independently installed, are assembled by multiple sections of pipelines and are distributed outside parts such as a casing. Each section of pipeline needs to be subjected to machining procedures such as pipe end forming, pipe bending and the like, all parts of the pipeline are connected with connectors such as joints and the like in a welding mode and the like, then are installed in a pipe joint mode and are fixed in a support mode and the like. Each machining or assembly stage of existing aircraft engine pipelines requires time, labor, materials, etc. Due to the large number, the process is cumbersome and often has high time, labor or capital costs. To reduce the machining and assembly process, the pipeline can be integrated on the assembly object in an additive manufacturing (namely 3D printing) mode. However, the pipe diameters of the conduits used on existing aircraft engines are typically larger than the range of diameters that can be self-supporting. Therefore, if the circular tube structure shown in fig. 1 is still used for additive manufacturing, a supporting structure needs to be added inside the pipeline in the additive manufacturing process, and the supporting structure is removed after the processing is completed. For the bent pipe or the annular pipe (not shown) shown in fig. 2, it is difficult to support the bent pipe or the annular pipe after the processing.

It is therefore desirable to develop a tube that is self-supporting during additive manufacturing to overcome at least one of the above-mentioned technical deficiencies.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the inside technical problem that needs increase bearing structure of current aeroengine outside pipeline in the vibration material disk manufacturing process, provide a novel vibration material disk manufacturing in-process pipeline that can self-supporting, can simplify the manufacturing procedure when the pipe fitting product adopts 3D printing method to prepare, reduce the manufacturing degree of difficulty to can further reduce the manufacturing cost of pipe fitting product.

Specifically, the present invention achieves the object in the following manner.

On one hand, the utility model provides a pipeline that can be self-supported in the additive manufacturing process, the cross-sectional figure of the pipeline perpendicular to the through-flow direction is a quadrangle with four corners all rounded; when the pipeline is placed on a printing platform, the line-surface angle formed by any side of the quadrangle and the printing platform is smaller than the maximum value of the self-supporting angle of the current material of the pipeline; the radius of the fillet is smaller than the maximum value of the self-supporting diameter of the current material of the pipeline. Wherein the maximum value of the self-supporting angle is typically 45 ° or less. When the printed part has a cantilever structure that is larger than the self-supporting angle, the cantilever structure is most likely to deform during the additive manufacturing forming process. And for a maximum value of the self-supporting diameter, typically only a few millimeters. If the printed part has a hole-like structure larger than this maximum diameter, this part is most likely to be deformed during the additive manufacturing forming process.

Preferably, at least one end of the pipeline is provided with a joint.

Preferably, the joint and the pipeline are of an integrated structure.

The utility model provides a but pipeline of self-supporting in the vibration material disk process is through adopting above-mentioned structural style, can print the preparation in-process at 3D and realize the self-supporting, and the pipeline cross-section appearance after the improvement can promote the preparation efficiency of aeroengine pipeline by a wide margin, reduces the operation degree of difficulty, only needs objective understanding this pipeline material self-supporting angle and self-supporting diameter can make the aeroengine pipeline that accords with operation requirement rapidly.

Drawings

Other objects, advantages and features of the present invention will become more readily apparent to those skilled in the art from the following detailed description.

Fig. 1 shows a schematic cross-sectional profile of a prior art aircraft engine pipeline perpendicular to the throughflow direction.

Fig. 2 is a schematic structural diagram of a bent pipe in a pipeline of an aircraft engine in the prior art.

Fig. 3 is a schematic cross-sectional profile perpendicular to a flow-through direction of a self-supporting pipe in an additive manufacturing process according to an embodiment of the present disclosure.

Detailed Description

Fig. 3 shows a schematic cross-sectional profile perpendicular to a flow direction of a self-supporting pipeline in a novel additive manufacturing process according to this embodiment; wherein, the cross-section figure of the pipeline vertical to the flow direction is a quadrangle with four corners rounded; when the pipeline is placed on a printing platform, the line-surface angle formed by any side of the quadrangle and the printing platform is smaller than the maximum value of the self-supporting angle of the current material of the pipeline; the radius of the fillet is smaller than the maximum value of the self-supporting diameter of the current material of the pipeline. Specifically, as shown in FIG. 3, the radius R of the top circle should be less than the self-supporting diameter limit; included angles alpha 1, alpha 2, alpha 3 and alpha 4 between each inclined edge and the horizontal direction of the printing platform are smaller than the additive manufacturing self-supporting angle limit. Wherein the maximum value of the self-supporting angle is typically 45 ° or less. When the printed part has a cantilever structure that is larger than the self-supporting angle, the cantilever structure is most likely to deform during the additive manufacturing forming process. And for a maximum value of the self-supporting diameter, typically only a few millimeters. If the printed part has a hole-like structure larger than this maximum diameter, this part is most likely to be deformed during the additive manufacturing forming process.

The pipeline structure that can self-supporting in the vibration material disk manufacturing process that this embodiment provided need not at its inside bearing structure that increases in vibration material disk manufacturing process, consequently also need not to get rid of its inside bearing structure after processing is accomplished to it goes the big problem of support degree of difficulty to have solved after processing is accomplished.

Further, in one preferred embodiment of this embodiment, at least one end of the pipeline is provided with a joint. The arrangement of the joint can facilitate the quick connection of the manufactured pipelines.

Further, in one preferred embodiment of this embodiment, the joint and the pipeline are of an integral structure. The design scheme of integral type structure can practice thrift required purchase cost when independently configuring the joint to enable the connection effect between adjacent pipeline more adaptation.

Although exemplary preferred embodiments have been shown and described herein, other embodiments consistent with the principles of the invention may be derived by those skilled in the art, and are considered within the scope of the invention.

Claims

1. A pipeline capable of self-supporting in an additive manufacturing process is characterized in that the pipeline is of an integrated structure, at least one end of the pipeline is provided with a joint, a cross section figure of the pipeline, perpendicular to a through-flow direction, is a quadrangle with four corners all being round corners, and when the pipeline is placed on a printing platform, a line-surface angle formed by any side of the quadrangle and the printing platform is smaller than the maximum value of the self-supporting angle of the current material of the pipeline; the radius of the fillet is smaller than the maximum value of the self-supporting diameter of the current material of the pipeline.