Control Method of Residuals in Machining Process of Cavity with Annular Gap

Abstract

The invention provides a method for controlling excess materials during the processing of a cavity with an annular gap. Before processing the inner cavity mold, clean animal fat is used as the gap filler in the inner cavity, and the entrance of the annular gap is blocked with a spring steel sheet to form an opposite Protect large chips, fine chips and cutting fluid from entering the inner cavity of the product. After processing, heating treatment, hot steam blowing, ultrasonic cleaning and pressure flushing cleaning and cleaning processes are used to clean the lard in the annular gap of the inner cavity to ensure that the cleanliness of the inner cavity of the product meets the requirements. The invention effectively solves the technical problem of preventing and controlling excess objects during the processing of the needle bolt injector housing of the liquid rocket engine thrust chamber, avoids the impact of excess objects on product performance, and improves the reliability of the product.

Description

technical field [0001] The invention belongs to the technical field of liquid rocket engine manufacturing, and mainly relates to a method for controlling redundant matter in the processing of a pintle type injector shell in a thrust chamber of a liquid rocket engine. Background technique [0002] Due to its simple structure, low cost, and excellent performance, the pintle thrust chamber has obvious advantages in the field of variable thrust engines and low-cost booster engines. Due to the integrated design of the pintle injector, the difficulty of processing the shell of its important parts and the difficulty of excess control are greatly increased. The injector shell processing process is long, covering shell blank processing, shell semi-finished welding and shell precision machining. It will affect the performance of the product, and in severe cases, it will lead to a decrease in engine performance, or even failure of the launch mission. [0003] In the conventional proc...

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Problems solved by technology

The injector shell processing process is long, covering shell blank processing, shell semi-finished welding and shell precision machining. Affect the performance of the product, in severe cases, it will lead to a decrease in engine performance, or even failure of the launch mission

[0003] In the conventional processing process, the entrance of the annular gap is often blocked by sticking insulating tape to prevent excess material from entering the inner cavity of the product. The effect of cutting temperature and cutting temperature makes the tape easy to fall off, causing cutting fluid, chips, etc. to enter the annular gap of the product and produce excess; the excess that enters the annular gap is difficult to remove and clean with conventional cleaning methods, bringing safety to the use of the product Hidden danger

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