G800 CNC Gear Hobbing Machine How do clamps and hobbers work?

The G800 CNC Gear Hobbing Machine is a specialized machine tool for machining gears, especially designed to handle large size gears with module 12 and diameters up to 800mm.

The G800 CNC Gear Hobbing Machine is a specialized machine tool for machining gears, especially designed to handle large size gears with module 12 and diameters up to 800mm. Its working principle follows the basic concept of helical gear meshing, utilizing the relative motion between the hob and the workpiece to cut the gear teeth.

During the machining process, the hob, as a cutting tool, is mounted on the hob spindle and driven to rotate by the main motor. The hob is usually made of high-speed steel or carbide, with a specific helix angle and tooth shape to match the module and tooth shape of the gear to be machined. The rotary motion of the hob is coupled with the rotary motion of the workpiece to form a continuous meshing process that cuts the exact tooth shape of the gear on the workpiece.

The workpiece is fixed on the table and rotated by the indexing worm gear. The table can be moved along the X, Y and Z axes to adjust the position of the workpiece in relation to the hob to ensure the correct generation of the gear tooth profile. In addition, the tool holder can move vertically along the column and can also adjust the angle around the horizontal axis to meet the processing needs of gears of different modules and diameters.

Fixtures are used to securely hold the workpiece to ensure stability and accuracy during the machining process. The fixture design needs to take into account the size and shape of the workpiece to ensure accurate centering and positioning of the workpiece during machining. On the G800 CNC hobbing machine, the accuracy and rigidity of the fixture has a direct impact on the quality of the final gear.

The work of the hob with the workpiece is controlled by a well-designed CNC program. The program will take into account the specific parameters of the gear, such as module, number of teeth, pressure angle, etc., as well as the characteristics of the hob, such as helix angle, tooth angle, etc., to ensure that the hob meshes correctly with the workpiece during the cutting process, so as to efficiently and accurately machine the required gear.