La Scelfo Mechanical Solutions, da anni nel settore, si occupa della Riparazione di Mandrini e Tavole Girevoli, con “Certificazione di Vibration Analyst”
Scelfo Mechanical Solutions, for years in the sector, deals with the Repair of Spindles and Rotating Tables, with “Vibration Analyst Certification”
We start with a visual inspection and look for obvious signs of damage or other factors that often cause spindle failure. The inspection process continues with the disassembly of the spindle, paying attention to signs of contamination, lack of lubrication, failure of supporting equipment, improper use or anything unusual.
Measurement of all the parts in the thermostatic chamber and subsequent definition of the actions and processes necessary for the revision or repair of the parts of the spindle / electrospindle damaged or out of tolerance
Rectification of bearing contact stops. Finishing grinding of bearing seats after chrome plating. Finishing grinding of the tool attachment cone after chrome plating
We assemble everything with the new bearings, gaskets, sealing rings, spacers and other reworked components. All components are checked, cleaned and the encoder is calibrated using an oscilloscope. To prevent contamination of the spindle, assembly is carried out in a clean environment at a controlled temperature.
We carry out the detection of temperatures, vibrations, electrical absorption, we verify the operation of the encoder (if present) in closed loop with SIEMENS SIMODRIVE converter. We do this work in increments of speed, increasing the number of revolutions from zero to the maximum speed to be sure that the spindle has been assembled correctly. All our spindles / electrospindles at the end of the test have a residual unbalance of 0.2-0.3 mm / sec at maximum speed.
We balance the rotating components before assembly and then perform a further balancing at the maximum number of revolutions to reduce residual vibrations as much as possible.
Check and calibration of the bearing preload springs.
Each repaired spindle is then subjected to a final quality control process to ensure that all the work we have performed has been carried out correctly. We check the tool locking system with an instrument that detects the clamping force, we check the rotation of the control bar at a distance of 300 mm, we check the sensors for checking the tool change and any probes.
Each repaired spindle is then subjected to a final quality control process to ensure that all the work we have performed has been carried out correctly. We check the tool locking system with an instrument that detects the clamping force, we check the rotation of the control bar at a distance of 300 mm, we check the sensors for checking the tool change and any probes. Only when we are fully satisfied that the spindle has passed all these tests will the same be returned to the customer with the certainty that it will work properly and that all high quality work has been carried out correctly.
