Solid rocket ramjet air inlet way machining method

Abstract

The invention discloses a solid rocket ramjet air inlet way machining method. The solid rocket ramjet air inlet way machining method comprises following steps that a, an air inlet way is divided intothree independent portions including a front segment, a middle segment and a tail segment; b, the front segment and the tail segment are machined; c, a whole titanium alloy steel plate is machined into an air way middle shell with the door-shaped cross section through a laser bending pre-forming method, the top face and the side face of a middle segment shell inner runner are subject to finish machining, a bottom plate of the middle segment is machined into the designed size and precision, and the shell and the bottom plate are spliced and welded and formed; d, the front segment, the middle segment and the tail segment of the air inlet way are sequentially in abut joint and welded into the complete air inlet way. The air inlet way is subject to segmented machining, the segments with the fixing requirement are machined, machining of all segments is more easier, a large device is not needed, machining precision is easily ensured, the yield is improved, production cost is reduced to the maximum degree, and the machining time of the middle segment of the air inlet way is greatly shortened.

Description

technical field [0001] The invention belongs to the field of solid rocket ramjet engines, and in particular relates to a method for processing an intake port of a solid rocket ramjet engine. Background technique [0002] With the continuous improvement of aircraft engine requirements and the development of aircraft technology, solid rocket ramjet has become the development direction due to its advantages such as high specific impulse, small size, light weight, compact structure, and low cost. In order to make the solid rocket ramjet work more efficiently, the design of the inlet of the solid rocket ramjet has become more and more complicated in recent years, and the requirements for the machining accuracy of the engine inlet are getting higher and higher. [0003] The structure of the inlet channel is a closed box-shaped channel with a gas inlet and a gas outlet at both ends. The machining accuracy requirements for different positions of the intake duct are different. For ...

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Problems solved by technology

[0005] The solid rocket ramjet engine inlet port processed by integral casting has good integrity and high strength, but poor precision, high cost and long production cycle

Due to the characteristics of the casting process, cracks are prone to occur in the casting air inlet, so the yield of this method is low

[0006] Integrated processing is to splice several whole plates into the structural shape of the air inlet, and then weld them. For the air inlet processing method of integrated processing, its advantage is that the flow channel has high precision, but due to the excessive weld seam in the processing Long, the stress after welding is not easy to control, and welding deformation is easy to occur, which will lead to the scrapping of the entire air inlet, so the yield of this method is also very low

At the same time, since this method is to process the entire air inlet at one time, it must be processed by a large machine tool, and the cost is high

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