Increasing the load capacity in the manufacture of a profile-conjugated globoid-cylindrical worm gear pair

In space technology, special drives are used to guide antennas, lenses and other systems. They must meet high requirements for positioning accuracy, smooth running, self-braking, reduced dimensions and weight, increased load capacity, service life and efficiency. The mechanical transmissions used in space systems are used in the form of combined converters, such as toothed cylindrical-worm, worm-screw, etc. With the help of worm gears with self-braking, it is possible to obtain precise and small movements. The main disadvantage that prevents an increase in the load capacity of existing globoid worm gears is the irrational geometry of the engagement along the linear contact of the helical surface of the globoid worm and the teeth of the cylindrical worm wheel, which reduces the load capacity and is due to the technological complexity of manufacturing the helical surface of the globoid worm of a radius non-linear profile. The objective of the study is to develop the CTE and manufacturing technology of a profile-conjugated globoid-cylindrical worm pair, providing an increase in the load capacity and a method for calculating the radius of reduced curvature and the contact patch of the conjugated working surfaces. The study was conducted using experimental and mathematical methods. Models, methods and a technological scheme for cutting a helical surface of a concave radius involute profile of a globoid worm by rotary turning were developed. The developed technology for manufacturing a profile-conjugated globoid-cylindrical worm pair can be used in space engineering, aircraft manufacturing, in the production of defense equipment and in general mechanical engineering.