Titanium alloy machining cutting device to improve tool life processing efficiency!

Release time：2022-10-19 18:13:51 丨 Number of visits：

The specific strength of titanium alloy products is very high in metal structure materials, its strength is comparable to steel, but its weight is only 57% of steel. The thermal conductivity of titanium alloy is small, small specific heat, so in titanium alloy processing local temperature rise fast and cutting temperature is very high, under the same conditions, machining titanium alloy cutting temperature is more than twice as high as 45 steel, titanium alloy custom processing heat is difficult to release through the workpiece. As a result, the temperature of the tool is very high, the tool tip is rapidly worn, and the service life is reduced.

The elastic modulus of titanium alloy is low, so that the processed surface is easy to produce rebound, especially the processing of thin-walled parts rebound is more serious, easy to cause strong friction between the blade surface and the processed surface, so as to wear the tool and edge collapse.

Titanium alloy chemical activity is very strong, easy to interact with oxygen, hydrogen, nitrogen at high temperature, so that its strength increases, plasticity decreases, in the heating and forging process formed in the oxygen-rich layer makes mechanical processing difficult.

Ultrasonic vibration cutting is a kind of pulse cutting from the microscopic point of view. In a vibration cycle, the effective cutting time of the tool is very short. More than 80% of the time, the tool is completely separated from the workpiece and chip. Tool and workpiece, chip intermittent contact, which makes the tool by the friction small, the heat generated greatly reduced, cutting force significantly decreased, avoid the ordinary cutting "let the knife" phenomenon, and do not produce chip tumor. Using this vibration cutting, precision machining can be carried out on ordinary machine tools, roundness, cylindricity, flatness, parallelism, straightness and other shape and position tolerances mainly depend on the accuracy of the machine tool spindle and guide rail, can achieve close to zero error, so that it is possible to grind, drill for hinge, milling for grinding. Compared with high-speed hard cutting, high machine rigidity is not required and the surface metallographic structure of the workpiece is not damaged. In the finishing process of curve contour parts, CNC lathes and machining centers can be used for profile processing, which can save the high cost of purchasing CNC grinder.

advantages

1. The ultrasonic milling force is small, about 1/3-1/10 of the milling force of ordinary lathe tools.

2. The high machining accuracy of ultrasonic turning mainly depends on the accuracy of the machine tool. The shape and position tolerance of the processed workpiece is almost close to the relevant accuracy of the machine tool.

3. The ultrasonic milling temperature is low, and the workpiece is kept at room temperature.

4. No chip tumor, small deformation of the workpiece, no burr.

5. The surface roughness of ultrasonic milling is low, which can be close to the theoretical roughness value and below Ra0.2.

6. The "rigidity" of ultrasonic machining parts, that is, compared with ordinary milling, equivalent to the increase of workpiece rigidity.

7. The ultrasonic processing process is stable and can effectively eliminate chatter.

8. The cooling and lubrication of ultrasonic milling fluid are improved.

9. The durability of the vehicle is several times to dozens of times.

10. The ultrasonic processed surface is in a state of compressive stress, and the fatigue strength, wear resistance and corrosion resistance of the parts are improved.