Process for forming equal-wall-thickness reducing fuel spray rod through selective laser melting

Abstract

The invention discloses a process for forming an equal-wall-thickness reducing fuel spray rod through selective laser melting, and belongs to the technical field of additive manufacturing. The processfor forming the equal-wall-thickness reducing fuel spray rod through selective laser melting comprises the following steps of: S1, establishing a three-dimensional model of an equal-wall-thickness reducing fuel spray rod; S2, determining the forming direction of the equal-wall-thickness reducing fuel spray rod; S3, adding supports; S4, setting selective laser melting forming process parameters; S5, forming the equal-wall-thickness reducing fuel spray rod through selective laser melting; and S6, carrying out post-processing. According to the process for forming the equal-wall-thickness reducing fuel spray rod through selective laser melting, the number of processing procedures of the equal-wall-thickness reducing fuel spray rod is greatly reduced, the turnover time is greatly shortened, tools and clamps are not needed, the manufacturing period is shortened, the manufacturing cost is reduced, and the technical problems of large welding deformation of the fuel spray rod, a long repair period of a heat shield, large assembly residual stress, repeated correction and the like are solved.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a process method of laser selective melting and forming equal-wall-thickness variable-diameter fuel spray rods. Background technique [0002] Laser selective melting forming technology has the characteristics of high forming precision and good dimensional conformity, and is especially suitable for the development and small batch trial production of small and medium-sized complex structural parts. In recent years, with the continuous improvement of laser selective melting forming process, equipment stability and quality reliability, it has gradually entered the product verification stage. At present, laser selective melting technology has become a favored new technology to deal with technical bottlenecks in the aerospace field. It has been used in many aerospace fields, and its performance is stable and reliable. [0003] The aero-engine fuel spray rod is a variabl...

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Problems solved by technology

[0004] In order to solve the technical problems existing in the prior art such as large welding deformation of the fuel spray rod, long heat shield repair cycle, large assembly residual stress and repeated correction, the present invention provides a fuel spray rod with equal wall thickness and variable diameter formed by laser selective melting The advanced process method greatly reduces the processing steps of fuel injection rods with equal wall thickness and variable diameter, shortens the turnaround time, and saves the manufacturing cycle and cost without the need for tools and fixtures

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