Precautions during the processing of titanium alloy machined parts

Release time:

2024-07-04

The cutting process of titanium alloy is strong cutting, so the spindle driving force of the machine tool is large and the cutting function is strong. In the aerospace industry, the processing of titanium alloy parts is mainly carried out in the milling of the cavity. To facilitate the removal of chips, cooling and lubrication devices should be managed. In order to facilitate the removal of chips, cooling and lubrication devices should be managed so that a large amount of high-pressure cooling lubricant can be directly sprayed. Knife. In this way, on the one hand, the tool can be cooled, and on the other hand, the chips can be promptly flushed out of the processing area to prevent them from being cut multiple times, thereby shortening the tool life. And scrape the processed surface. In order to enable the machine tool to have high-power cutting function, titanium machining parts manufacturers have specifically designed product structures and coordinate axis structures, and are equipped with powerful cutting and swinging units, which have excellent rigidity to install the tool spindle. Therefore, the machine tool is in a vertical, horizontal, and spatial state. Can generate the same cutting force at any angle.
The characteristics of titanium alloy are high strength and poor thermal conductivity. In order to achieve cutting efficiency similar to aluminum processing, it is necessary to increase cutting parameters as much as possible, that is, increase the amount of metal input and cutting depth, resulting in an increase in cutting force, which may lead to static deviations between workpieces. And tools, this may cause damage to the parts. The decrease in shape accuracy or unstable machining process also accelerates tool wear. Therefore, machine tools used for titanium alloy processing must have high power and static and dynamic characteristics (high static and dynamic stiffness); It also needs to be equipped with corresponding high-pressure cooling and lubrication equipment for low-speed and high torque processing. Timely clean the chips to reduce tool wear and reduce the heat generated during the machining process. In order to improve the rigidity of machine tools, some machine tool manufacturers use welded steel structures in box structures or enclosed frames. The high-power feed motor driver of the feed shaft and the high stiffness gapless guidance system can be fixed in the machining position to further improve the rigidity of the machine. In addition, it is necessary to improve the entire system, including the spindle tool connecting rod section and the tool holder. Stiffness during processing.
In addition to static stiffness, the dynamic characteristics of machine tools also play a decisive role in the effective processing of titanium alloys. The stability of the control process is a huge challenge. If the rigidity of the machine tool is low and the damping characteristics are poor, the high cutting force during the cutting process may generate self-excited vibration, with low speed and excitation frequency close to the natural frequency of the machine tool. It itself causes vibration during the processing. In addition to affecting the surface quality of the workpiece (with vibration lines), this vibration can also damage the machine structure, cutting tools, and tools. The wear of cutting tools increases or even fractures. The stability of the machining process mainly depends on parameters such as spindle speed and selected cutting depth. Users should understand the performance of the machine tool and the maximum cutting depth that can be achieved. It can also actively place the anti vibration pad on the machine tool and pre place parameters in the machine tool control equipment to avoid the limitation range of cutting depth. Vibration measures can further improve the seismic resistance of the machine.

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