Gear hobbing semiautomatic machines are designed for production processing of spur and helical gears, as well as sprockets and worm wheels by worm cutters by rolling.
Semiautomatic machines are made with a vertical axis of the part, a movable front stand and a fixed table. Axial feed is carried out by moving the saddle slide along the vertical guides of the front stand. Speed control of the cutter spindle, as well as the axial and radial feeds, is controlled steplessly by asynchronous motors or servomotors (depending on equipment version) controlled by frequency converters.
Prominent features of semiautomatic machines are high static and dynamic rigidity due to the rational shape of stand guides and carriage slide, increasing the rigidity of the main units.
To use the entire length of the cutting edges of the worm cutter, its periodic movement along the axis is provided.
Semiautomatic machines have a centralized lubrication system.
Semi-automatic BCH-350 NC 22 is equipped with an operator panel, a programmable controller and SIEMENS drives.
Semiautomatic machines BCH-350 SNC 25, GВСН-ЗА50СNС25 are equipped with SINUMERIK-840Dsl CNC system and have “untied” kinematic chains.