Controlled Movements in Column-and-Knee-Type Milling Machines

How are controlled movements of the work achieved in column-and-knee-type milling machines?

1. Through the use of a knee and a saddle.

2. Through the use of a spindle and a table.

3. Through the use of a headstock and a tailstock.

Answer:

Controlled movements of the work in column-and-knee-type milling machines are achieved through the use of a knee and a saddle.

In column-and-knee-type milling machines, controlled movements of the work in three mutually perpendicular directions are achieved through the use of a knee and a saddle. The knee is responsible for the up-and-down movement of the work, while the saddle controls the side-to-side and back-and-forth movements. This combination allows for precise positioning and cutting of the workpiece.

For example, if you want to create a slot in a piece of metal, you can use the knee to lower the cutting tool into the material, and then use the saddle to move the workpiece horizontally to create the desired slot.

This method provides accuracy and control in the machining process, enabling the production of intricate and precise components.