Patent ID: 9283654
Filing Date: 2016-03-15
CPC Classification: B24B

Claim Text:
1. A method of grinding spring ends of helical compression springs using a numerically controlled spring end grinding machine having a grinding unit, a loading unit and a control unit that controls the loading unit and the grinding unit, wherein the grinding unit has a pair of grinding wheels comprising two rotatable grinding wheels, between which there is formed a grinding space, and the loading unit has at least one loading plate rotatable substantially axially parallel to the grinding wheels and has a plurality of out-of-axis spring receptacles, each for receiving a helical compression spring, wherein, during a grinding operation, helical compression springs that have been received in spring receptacles are successively transported through the grinding space between the rotating grinding wheels by rotation of the loading plate and, as this happens, both spring ends of the helical compression springs located in the grinding space are in each case simultaneously machined by grinding, comprising: determining a temperature signal representing the temperature by a temperature measurement on at least one of the helical compression springs during the grinding operation; and controlling the spring end grinding machine depending on the temperature signal; wherein a control program is active in the control unit and configured to process the temperature signal or a signal derived from it, and the control unit changes at least one operating parameter of the grinding unit and/or the loading unit depending on the temperature signal during the grinding operation.