Space fixed-axis milling machining method for integral titanium alloy air compression impeller

Abstract

The invention discloses a space fixed-axis milling machining method for an integral titanium alloy air compression impeller. The space fixed-axis milling machining method comprises the following stepsthat firstly, impeller roughening is conducted, wherein 1), modeling is conducted, a cavity structure between adjacent blades is determined, and modeling is conducted; 2), area division is conducted,and an impeller blank is divided into multiple areas; and 3), directional programming is conducted, one tool axis direction suitable for single-area milling is determined, then, the determined tool axis direction is fixed, the feed path suitable for the area is programmed in the direction, finally, blank milling simulating in the area is finished, a practical program suitable for machine tool machining is processed, the process is repeatedly conducted on each area, and integral impeller roughening is finished; secondly, blade finish milling is conducted; and thirdly, runner finish milling isconducted.

Description

technical field [0001] The invention belongs to the technical field of an integral titanium alloy compressor impeller, and relates to a space fixed-axis milling processing method of an integral titanium alloy compressor impeller. Background technique [0002] In recent years, with the increasing demand for steam compressor products, how to improve product production efficiency has become an urgent problem to be solved. [0003] The milling work of the existing integral titanium alloy compressor impeller is mainly divided into three steps: roughing of the impeller, fine milling of the blade, and fine milling of the runner. These three steps are all five-axis linkage processing. Or the runner line swings continuously, and according to the distance between adjacent blades, the cutters of appropriate size are selected in different areas to complete the overall milling of the impeller. The above method has the following disadvantages: 1. The feed parameter is low. In the existin...

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Problems solved by technology

The above method has the following disadvantages: 1. The feed parameter is low. In the existing five-axis linkage machining, the cutter shaft continuously oscillates in space along the meridian of the impeller or the flow channel curve. During the oscillating process, the instantaneous margin time of the parts to be removed Give the spindle shaft of the machine tool a spatial reverse force, the larger the feed parameter, the greater the reverse force, and the allowable safety load of the machine tool shaft is limited, so in the process of processing, it is limited by the processing method 2. The tool cost is high, and the tool used in the five-axis linkage is affected by the continuous reciprocating swing of the space tool axis. It must pass through the center. In view of the fact that the processed impeller material is titanium alloy, in the previous processing process, the selected cutting tool that meets the requirements is an integral carbide milling cutter. This milling cutter is expensive. With the integral titanium alloy As the diameter of the alloy impeller increases, more and more tools are consumed to complete the milling of the impeller, and the cost of the tools remains high

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