Titanium is an important structural metal developed in the 1950s. Titanium alloys are widely used in various fields because of their high strength, good corrosion resistance, and high heat resistance. Many countries in the world have recognized the importance of titanium alloy materials, have carried out research and development, and have applied them in practice.

Titanium alloy cutting is a common problem in various titanium alloy manufacturers. High-pressure cooling and lubrication are effective measures to solve the problem of titanium alloy cutting.

Characteristics of high-pressure cooling

In actual use, effective cooling of cutting tools and effective control of chips are the prerequisites, which require high pressure of cooling lubricant, sufficient flow, and accurate alignment of the contact area between cutting edges and chips. The high-pressure cooling system directly through the spindle/tool is adopted to drive the external spray cutting tool sprayed by multiple external nozzles, to maintain the good operating performance of the spindle, quickly cool the tool, workpiece, and punching and discharging chips, improve the processing quality of parts, increase the service life of the tool, improve the reliability of processing, and facilitate the automation of the cutting process.

Advantages of high-pressure cooling

1. High-pressure cooling can improve chip breaking

Accurate orientation and parallel 0 ~ 100MPa high-pressure coolant high-speed jet can remove chips from the surface of the indexing blade, which can play the role of cooling and early chip breaking, and achieve better chip control. At the same time, the effective cooling of the cutting edge reduces the sensitivity of the cutting edge to thermal fluctuations.

2. High-pressure cooling can improve cutting speed

When machining titanium alloy, the cutting tool of mechanically clamping the indexable piece and the integral cemented carbide cutting tool are generally used. Compared with conventional machining, when high-pressure cooling is used, due to the reduction of the temperature in the cutting area, the durability of the tool is improved, and the cutting speed can be increased by 200%.

3. High-pressure cooling can improve surface quality

The fluctuation of surface quality is due to the influence of temperature change and cutting force during machining. The traditional cooling method has a positive impact on improving the surface quality of the workpiece, and the high-pressure cooling greatly affects the result of finishing machining.

When adopting high-pressure cooling, the following points should be considered:

1. Accurately coordinate the relationship between pressure, flow, and nozzle aperture

The size of the nozzle aperture should be selected to generate pressure and the flow rate of cooling and lubricating liquid. For example, if a nozzle with an aperture of 1mm is used on the tool, a cooling and lubricating fluid flow of 5l/min are required to maintain sufficient pressure.

2. Determination of working pressure of safety coolant

It should be noted that the coolant pressure should not exceed the safe coolant working pressure that the tool can bear. When working, refer to the safe coolant pressure of the tool series provided by the tool manufacturer.

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