Due to the high wear resistance and high hardness of WC particles in cemented carbide

the rapid wear and the production of cracks of tools would be caused while employing the conventional techniques. The manufactured thread also has problems such as low accuracy

surface damage

difficulty to control the tiny shape

and weak manufacturing flexibility. At the same time

the laser processing is also limited to the texture structure of the two-dimensional plane. Therefore

it is of great significance to study the laser-controlled forming of complex three-dimensional thread shape. The surface of cemented carbide bars is turned by using a picosecond laser. The laser turning method is utilized to study the complex thread profile of cemented carbide. The findings demonstrate that the combination of laser scanning speed and feed rate has a close relationship with the thread profile. While the material removal rate and laser scanning speed displayed a nonlinear relationship

the depth of the thread profile obtained steadily increased with the decreasing of laser scanning speed under the fixed laser power and spindle feed rate. At the laser scanning speed of 35 mm/s

the best material removal rate is 5.95×10-3 mm3/s

and the surface quality of the thread groove is good.