TOOLS UNIT FOR HYDROPLASTIC MACHINING OF SPUR GEARS

The tool set is applicable in the mechanical engineering and the metal processing industries. It allows to accurately treat machine gears along the cog direction, thus ensuring the excellent quality of the cog shape. The set consists of a pack of deformation discs (1), shaped to fit the inner working profile (3), which is slanted at an α1 angle at its inlet - this being the attack section (4). Its outlet forms an outlet profile section (5) at an α2 section. The deformation discs (1) are inserted in a pack in a cylindrical opening of a bandaging cup (7), statically fixed in the conical orifice of the bandage (2). The lowest deformation disc (1) rests on the face of a flange-shaped outlet guide (12) with a profiled inner surface (13). The guide (12) is inserted into an opening of the base plate (15) and contains a step (14) shaped along its external cylindrical surface. Its vertical orifices (19), located along the flange periphery (16) of the outlet guide (12), mount stationary centring pins (20), onto which the deformation discs(1) are hinged and accurately adjusted. They are guided by the centring pins (20) via the centring openings (21) and pressed in the vertical direction through a guide (22).