Analysis of Grinding Technology of Spiroid Worm on a Classical Grinding Machine

The finishing operation (grinding) is a complex task of the field of spiroid worm manufacturing. I am investigating the grinding process of spiroid worm using lathe center displacement on a classical cylindrical grinding machine. The lathe center displacement means the adjustment of the spiroid worm according to the half taper angle to get a horizontal position of the generatix of the taper of the spiroid worm in comparison with the center line of the grinding wheel. In this case the center distance between the spiroid worm and the grinding wheel is permanent during the whole grinding process. This adjustment causes changing angular velocity for the rotation of the spiroid worm that affects to the error of the lead of thread and the error of the position of the pitch circle diameter that can influence the profile accuracy during the whole grinding process.