Precautions During Processing Of Titanium Alloy Processing Parts

Precautions during processing of titanium alloy processing parts

The cutting process of titanium alloy is powerful cutting, so the machine tool spindle has strong driving force and strong cutting function. In the aerospace industry, the processing of titanium alloy parts is mainly in the milling of mold cavities. To facilitate chip removal, cooling and lubrication devices should be managed.

To facilitate chip removal, the cooling and lubrication devices should be managed so that large amounts of high-pressure cooling lubricant can be sprayed directly. knife. In this way, on the one hand, the tool can be cooled, and on the other hand, the chips can be rushed out of the processing area in time to prevent the chips from being cut multiple times, thereby shortening the tool life. and scrape the machined surface. In order to enable the machine tool to have high-power cutting functions, the titanium machined parts manufacturer has specifically designed the product structure and coordinate axis structure, and is equipped with a powerful cutting and swing unit with excellent rigidity to install the tool spindle, so the machine tool is vertical, Horizontal and spatial conditions. Can produce the same cutting force at any angle.

Titanium alloy is characterized by high strength and poor thermal conductivity. In order to achieve the same cutting efficiency as aluminum processing, it is necessary to increase the cutting parameters as much as possible, that is, increase the amount of gold and cutting depth, resulting in an increase in cutting force, which may lead to static deviations between workpieces. and tools, which may cause damage to parts. The shape accuracy is reduced or the machining process is unstable, which also accelerates tool wear.

Therefore, machine tools used for titanium alloy processing must have high power and have 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, high-torque processing. Clean chips promptly to reduce tool wear and reduce heat generated during machining. In order to increase the rigidity of machine tools, some machine tool manufacturers use welded steel structures in box structures or closed frames. The high-power feed motor drive and high-rigidity gap-free guide system of the feed axis can be fixed in the processing position to further improve the rigidity of the machine. In addition, the entire system including the spindle tool linkage section and the tool holder must be improved. Stiffness during machining.

In addition to the static stiffness, the dynamic properties of the machine tool also play a decisive role in the efficient machining of titanium alloys. Controlling process stability is a huge challenge. If the machine tool has low rigidity and poor damping characteristics, self-excited vibration may occur due to high cutting forces during cutting, the rotation speed is low and the excitation frequency is close to the natural frequency of the machine tool. itself, causing chatter during 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 tool wear increases and even breaks. The stability of the machining process mainly depends on parameters such as spindle speed and selected cutting depth. Users should understand the capabilities of the machine tool and the ultimate depth of cut that can be achieved. It can also actively place anti-vibration pads on the machine tool and pre-place parameters in the machine tool control device to avoid the restricted range of cutting depth. Vibration measures can further improve the machine's shock resistance.