| Erwin Junker Maschinenfabrik GmbH Patent applications |
| Patent application number | Title | Published |
|---|
| 20110195635 | METHOD AND GRINDING MACHINE FOR THE COMPLETE GRINDING OF SHORT AND/OR ROD-SHAPED WORKPIECES - Short and/or rod-shaped workpieces are completely machined by grinding two parallel end faces and the longitudinal sides of the workpiece with very short cycle times. The grinding machine includes two grinding spindles that are arranged in a tandem arrangement with parallel rotational axes on a shared grinding headstock and that are jointly moved in the X direction. In cooperation with a special holding and transport device for the workpieces, two workpieces are each ground, at least partly concurrently, the end faces of the one workpiece being ground in one machining position and the final non-circular grinding of the exterior contour of a second workpiece occurring in a second machining station, the end faces of the second workpiece having already been ground. | 08-11-2011 |
| 20110003534 | METHOD FOR GRINDING THE MAIN AND ROD BEARINGS OF A CRANKSHAFT BY EXTERNAL CYLINDRICAL GRINDING AND APPARATUS FOR CARRYING OUT THE METHOD - In the cylindrical grinding of the main and rod bearings of crankshafts, the rod bearings are ground prior to the main bearings. The advantage of this is that the deformations that unavoidably occur, mainly during grinding of the rod bearings due to the removal of ground material are taken into account and compensated for again during grinding of the main bearings. The rod bearings are ground through CNC-control in the pin-chasing grinding method, and the crankshaft is held in a rotating axis in the process, said axis defined by two bearing points in the longitudinal extension of the crankshaft main bearing which are only machined. Deviations in said actual rotating axis from the determining geometric longitudinal axis of the crankshaft are taken into account in the pin-chasing grinding method by the computer of the grinding machine. The finished ground rod bearings then have an exact relation to the main bearings, which would have been ground strictly according to the determining geometric longitudinal axis of the crankshaft. | 01-06-2011 |
| 20100181712 | METHOD FOR THE SUPPORT OF A ROTATING WORKPIECE DURING GRINDING AND A HYDRODYNAMIC STEADY REST - In a method for the hydrodynamic support and centering of a rotating workpiece during grinding and a steady rest usable for this purpose the bearing to be supported is impinged upon by a contact pressure which changes in accordance with rotational speed from a minimum pressure when the shaft is started from a standstill, to a maximum value during the processing rotational speed. The steady rest has an opening of a transversebore in a central bore receiving a supply line by which a lubricant can be supplied as hydraulic fluid to the bearing. The method is particularly suitable for the processing of camshafts and crankshafts. | 07-22-2010 |
| 20100062690 | METHOD OF GRINDING AN INDEXABLE INSERT AND GRINDING WHEEL FOR CARRYING OUT THE GRINDING METHOD - In an indexable insert having wide sides, inclined narrow sides are to be ground, that is to say the grinding allowance | 03-11-2010 |
