Large grinding machine tackles turbine shafts in single set-up

The machine supplied is a high precision cylindrical grinder model HG-91-4000-B8 to grind turbine shafts and provides an accurate, reliable and complete solution for grinding all diameters, faces, radii and the tapers of the turbine shaft in one set-up. Grinding the part in one clamping is a must to achieve the maximum geometric precision and minimum part handling. The customer’s difficult-to-manipulate components currently requiring up to 18 operations on the same component forced them to grind the parts with several clampings. The Danobat machine is equipped with a wheelhead that holds two hydrostatic spindles assembled on a continuous rotary table driven by a high torque integrated motor with direct transmission, which is patented by Danobat.. Both spindles can adapt to the various grinding operations of the part. They are independent with individual transmission and balancing systems. Reliability is another critical factor on this type of process. This is assured by the complete measurement of the part during the grinding process and at the end of the cycle. The machine is equipped with an absolute multi-diameter MDM measuring head for the control of cylindrical and tapered surfaces during the grinding process guaranteeing the maximum dimensional precision. This system can also measure the part at the end of the cycle in automatic mode and generate a Measuring Written Report eliminating manual inspection. Finally, the machine includes a measuring probe on the wheel head for taper correction at the beginning of the cycle and to measure the taper during the grinding process. The taper correction is carried out automatically by the motorised double body tail stock.