Abstract: Machine and method for deep rolling fillets of split-pins of engine crankshafts. Each split-pin comprises neighboring and arcuately offset crank pins connected between counter weights and has a centralized splitter fence which receives side loads from the connecting rods. Annular fillets are formed between the pins and opposite sides of the splitter fence as well as between the fillets and their associated counter weights. Limbs of the fillets at the splitter fence that describe the overlap of the split-pins are deep rolled with a high load for improving yield strength while the remaining arcuate portions of the fillets are rolled at lower loads to improve strength without undue distortion of the fence. The overlap of pin to main journals can also be rolled with increased load for increased yield strength.

Abstract: Machine and method for deep rolling annular fillets of journals of metallic workpieces, such as the crank pins of an engine crankshaft in which the crankshaft is loaded into a center positioned turning lathe, and left and right hand banks of floating jaw units located on opposite sides of the lathe are moved from a first station in which crankshafts can be loaded on or unloaded from the lathe to a second station in which inboard jaw ends of the jaw units with fillet rolling tools aboard are operatively engaged under load with each of the pin fillets, which are then simultaneously rolled as the lathe motor turns the crankshaft about its rotational axis and the tooling carried by the floating jaw units orbits the axis and completely deep rolls the fillets.

Abstract: Arcuately offset pairs of juxtapositioned pin journals of an internal combustion engine crankshaft have their fillets pressure rolled for fatigue strengthening by opposing inclined rollers carried in cages at the lower ends of a pair of relatively rotatable tool housings supported in a side-by-side relationship by a pair of jaws of floating clamping structure. This structure allows the rollers to follow the crank pin journals as the crankshaft is being turned so that arcuately offset crank pin fillets can be simultaneously pressure worked and strengthened. Opposing roller reaction loads are cancelled at load receiving bearings operatively interposed between the pair of tool housings.

Abstract: In known deep-hole drilling machines, the undesirable situation arises, in the case of large drilling depths, that the boring bar, which becomes increasingly softer with increasing drilling depth, sags and starts to vibrate, so that the boring bar must be supported. This should, however, be possible at suitable spacings in the simplest possible manner and without interrupting the working process. For this purpose, it is envisaged that at least one guide bush for supporting the boring bar in a workpiece bore is provided on the boring bar, the guide bush being associated in a coaxial arrangement with a clamping ring of a ringe thickness which makes self-jamming tilting on the boring bar possible, and which clamping ring is pivotally coupled at one peripheral point to the guide bush to permit a small radial movement and has an external diameter smaller than that of the guide bush, and that at least one disengageable stopping device for a guide bush is provided within the coolant feed device.

Abstract: This rolling apparatus comprises tool rollers for finish or smooth rolling the bearing seats of crankshafts. Each tool roller is supported by two idler rollers along its length. In addition, the tool rollers are supported against axial displacement by glide plates. Each tool roller end is held in a recess of a respective glide plate. The recess narrows down at the roller holding end so that the respective roller can protrude only partially beyond the glide plates but sufficiently against the bearing seat to be smoothed. The glide plates are made of a material, such as brass or the like, which will protect the respective axial guide faces of the crankshaft bearing seat.