Gr7 Titanium Alloy in The Machining Process Of Precautions

The cutting process of Gr7 titanium alloy is powerful cutting, so the machine tool spindle drive force is large and the cutting function is strong. In the aerospace industry, the machining of titanium alloy parts is mainly in the milling of cavities. To facilitate chip removal, cooling and lubrication devices should be managed. To facilitate chip removal, cooling and lubrication devices should be managed so that large quantities of high-pressure cooling lubricant can be directly sprayed. Knives. In this way, the tool can be cooled on the one hand, and on the other hand, the chips can be flushed out of the machining area in time to prevent them from being cut multiple times, which would shorten the tool life. and scraping the machined surface. In order to make the machine with high power cutting function, titanium machining parts manufacturers targeted design product structure and coordinate axis structure, and equipped with powerful cutting and swing unit with excellent rigidity to mount the tool spindle, so the machine is in the vertical, horizontal and space state. The same cutting force can be generated at any angle.

Titanium alloys are characterized by high strength and poor thermal conductivity. In order to achieve the same cutting efficiency as in machining aluminum, it is necessary to increase the cutting parameters as much as possible, i.e., increase the feed and depth of cut, resulting in higher cutting forces, which may lead to static deviations between the work piece. and tools, which may result in damage to the part. Reduced shape accuracy or unstable machining process which also accelerates tool wear. Therefore, the machine tool used for titanium machining must have high power with static and dynamic characteristics (high static and dynamic stiffness); it also needs to be equipped with the appropriate high-pressure cooling and lubrication equipment for low-speed, high-torque machining. Chips are cleaned in a timely manner to minimize tool wear and reduce heat generated during machining. In order to increase the rigidity of the machine, some machine tool manufacturers use welded steel structures in boxes or closed frames. High-power feed motor drives for feed axes and high-stiffness backlash-free guide systems can be fixed in the machining position to further increase the machine's rigidity. In addition, the entire system including the spindle tool linkage section and the toolholder must be improved. Stiffness during machining.

In addition to static stiffness, the dynamic characteristics of the machine play a decisive role in the efficient machining of titanium alloys. Controlling the stability of the process is a great challenge. If the machine tool has low stiffness and poor damping characteristics, self-excited vibrations may occur due to high cutting forces during the cutting process, with low rotational speeds and excitation frequencies close to the intrinsic frequency of the machine tool. itself, resulting in tremors during machining. In addition to affecting the surface quality of the workpiece (with vibration lines), this chatter can damage the machine structure, tool strains and tools. Tool wear increases and even breaks. The stability of the machining process depends mainly on parameters such as spindle speed and selected depth of cut. The user should be aware of the performance of the machine and the limit of the depth of cut that can be achieved. It is also possible to proactively place anti-vibration mats on the machine and pre-position parameters in the machine control equipment to avoid a limiting range of depths of cut. Vibration measures can further improve the vibration resistance of the machine.