Process method for reducing corner-cleaning milling vibration of root part of integral closed impeller

Abstract

The invention relates to a process method for reducing the corner-cleaning milling vibration of the root part of an integral closed impeller. According to the process method, milling processing is carried out on parts of various metal integral closed impeller systems, complex curved surface integral impellers and deep cavity curved surface system structures on five-shaft linked processing central equipment by adopting a rigid alloy milling cutter containing 0.2-0.8 micrometer superfine or extremely fine particles; and the process method is realized through the selection on a cutter structure, a cutter cutting locus, a cutter feeding method, a feeding direction, a cutting depth and a cutter shaft vector parameter, the setting of the processing allowance of rough processing and fine processing and the adoption of parameters. The process method disclosed by the invention can be used for carrying out the milling processing on the parts of the integral closed impeller systems, the complex curved surface integral impellers and the complex deep cavity curved surface system structures, thereby realizing the enhancement of a manufacturing process of a complex structural system part, ensuring the requirements for quality, property and design of a product and enhancing the stability of product property.

Description

technical field [0001] The invention relates to a specific manufacturing process for complex structural parts such as integral closed impeller systems and complex boxes in the high-tech fields of aviation and aerospace. Background technique [0002] With the continuous development of the aviation and aerospace industries, in order to meet the requirements of high speed, high thrust-to-weight ratio, high efficiency and high performance of related aviation and spacecraft equipment and components, a large number of high-performance and high-efficiency components are used in the design of new structural components. Various types of integral closed impeller systems, complex integral impellers and complex deep cavity curved surface structural parts. At present, the core components of many high-thrust ratio, high-performance aviation high-end heat exchange system projects in foreign countries: fans, compressor impellers, and turbines all adopt integral closed and integral semi-clos...

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the complexity of the part structure, it is difficult to control the vector of the tool axis when machining the root of the part, and the tool is very easy to interfere with the adjacent blades and flow channels, and damage the part

[0005] 2. The cutting texture is messy, the streamline is not good, and the resistance is large, which affects the subsequent process (such as dynamic balance performance, over-rotation performance) and product performance

[0006] 3. The length-to-diameter ratio of the cutting tool is large, and the deformation of the tool is serious during the cutting process. When cutting the root of the impeller, it is easy to overcut, undercut or even seriously dig deep, resulting in a large error in the contour of the root surface, which affects the dynamic balance performance of the overall part and Parts work reliability

[0007] 4. Due to the narrow flow space of the parts and the large length-to-diameter ratio of the cutting tool, severe cutting vibrations are likely to occur during the cutting process, resulting in extremely easy damage to the cutting tool (tool chipping, tool breaking), and easy damage to the precision of the machined surface of the part. In severe cases, the parts will be scrapped. At the same time, the cutting vibration will also affect the cutting efficiency and the stability of the equipment operation.

[0008] 5. Due to the large length-to-diameter ratio of the cutting tool, the cutting process is easy to produce a knife (that is, the cutting is not accurate due to the deformation of the tool), and the blade is not easy to cut into the material matrix, resulting in severe cutting hardening, and the blade is easy to passivate, which affects the cutting performance and produces a large amount of The cutting heat, affected by it, the tendency of blade surface deformation will increase

[0009] The angle-clearing CNC milling of the integral impeller system parts cannot meet the product requirements with the traditional milling technology.

Images