Gear processing丨The transmission principle of processing spur gears

Immediately after the last time I shared with you "Gear hobbing"Today, I would like to share with you the transmission principle of processing spur gears. The details are as follows for reference.

Transmission principle of machining spur gear:

1、展成运动传动链联系滚刀主轴的旋转运动B11和工件旋转运动B12的传动链(4-5-ux-6-7-工作台)为展成运动传动链。

This transmission chain guarantees the strict movement relationship between the workpiece and the tool, and the displacement mechanism uX is used to adapt to the changes in the number of teeth of the workpiece and the number of hob heads.

This is an internal transmission chain. It not only requires an accurate transmission ratio, but also requires that the direction of rotation of the hob and the workpiece must conform to the direction of relative movement when a pair of cross-shaft helical gears mesh.

When the hob rotation direction is constant, the rotation direction of the workpiece is determined by the hob spiral direction.

2、主运动传动链主运动传动链是联系动力源和滚刀主轴的传动链。主运动传动链为：电动机-1-2-uv-3-4-滚刀。

This is an externally connected transmission chain. The displacement mechanism uV in the transmission chain is used to adjust the forming speed of the involute tooth profile. The hob speed should be determined according to the process conditions to adjust its transmission ratio.

3. In order to cut out the entire tooth width, the vertical feed motion transmission chain must make a linear feed motion A2 along the axis of the workpiece while the hob is rotating by itself. The vertical feed motion of the hob is carried out by the hob holder along the column guide rail. Mobile implementation.

The vertical feed motion transmission chain that connects the worktable and the tool post is: 7-8-uf-9-10, the replacement mechanism uf in the transmission chain is used to adjust the size and direction of the vertical feed to Adapt to the requirements of different processing surface roughness.

Since the vertical feed movement of the tool post is a simple movement, this transmission chain is an external connection transmission chain.

Usually, the displacement of the tool post represents the size of the vertical feed per revolution of the worktable (workpiece).

Note: processing on the gear hobbing machineSpur gearThere must be two motions: a generative motion to form an involute tooth profile and a motion to form a straight tooth surface (wire).

AboveGear processingRelated instructions for the transmission principle of processing spur gears. If there are any unclear points or related product processing requirements, you can click the consultation window on the right side of EP for free consultation.