Working principle of gear hobbing machine

Writer： admin Time：2024-08-23 14:42:17 Browse：56℃

Gear hobbing according to the principle of development - rolling cutting method

The process of inserting the pin is like a pair of gears meshing without clearance, one of which is the workpiece and the other is a special gear (gear hobbing cutter).

 The gear hobbing cutter itself is like a correction gear, which can be repeatedly sharpened and used after wear. The modulus of the gear hobbing cutter is

The pressure angle must be equal to the modulus and pressure angle of the processed gear. When inserting a helical gear with a disc cutter, the helix angles of the two must be equal. 

When processing an external gear, the helix directions of the two must be opposite, and when processing an internal gear, the helix directions of the two must be the same. Each tooth of the gear hobbing knife

The involute profile and tooth tip are both made with cutting edges: one top edge and two side edges, which have a leading angle and a trailing angle.

In order to achieve the rolling cutting process during cutting, the gear hobbing tool and the gear blank (workpiece) rotate around their own axes in different directions, and their mutual relationship is shown in the formula

   n/n0=z0/z     

式中n——Workpiece rotate speed

n0——Gear cutter speed

z——Number of teeth on the workpiece

z0——Number of teeth on the hobbing cutter

Gear hobbing according to the principle of development - rolling cutting method

The process of inserting the pin is like a pair of gears meshing without clearance, one of which is the workpiece and the other is a special gear (gear hobbing cutter). 

The gear hobbing cutter itself is like a correction gear, which can be repeatedly sharpened and used after wear. The modulus of the gear hobbing cutter is

The pressure angle must be equal to the modulus and pressure angle of the processed gear. When inserting a helical gear with a disc cutter, the helix angles of the two must be equal.

 When processing an external gear, the helix directions of the two must be opposite, and when processing an internal gear, the helix directions of the two must be the same. Each tooth of the gear hobbing knife

The involute profile and tooth tip are both made with cutting edges: one top edge and two side edges, which have a leading angle and a trailing angle.

In order to achieve the rolling cutting process during cutting, the gear hobbing tool and the gear blank (workpiece) rotate around their own axes in different directions, and their mutual relationship is shown in the formula