Today, let's briefly talk about the principle of automatic tool change of CNC engraving machine. The automatic tool change system refers to a processing device that realizes the tool change requirements of continuous processing between parts. The automatic tool changing system is mainly composed of a tool magazine and a tool changing device. Among them, there are three types of automatic tool changing methods that are most widely used, namely, tool changing with rotary tool post, tool changing with spindle head, and automatic tool changing with tool magazine. and so on. The tool magazine can be vertical or horizontal.

Rotary tool post tool change: Similar to the indexing worktable, the exchange of old and new tools is realized by rotating the tool post at a fixed angle.

Replacing the spindle head Tool changing method: first place the tool on each spindle head. The purpose of changing the tool is achieved by replacing the spindle head by the rotation of the turret. These two methods have simple design, short tool change time and high reliability. The disadvantage is that the number of reserved tools is limited, especially the rigidity of the spindle system that replaces the spindle head and the tool change method is poor, so it is only suitable for machine tools with few processes and low precision requirements.

Automatic tool change mode with tool magazine: It is composed of tool magazine, tool selection system, tool exchange mechanism and other parts, and the structure is more complicated. Because of its high degree of automation, it is widely used when processing complex parts with many processes.

The basic requirements that an automatic tool changing system should meet include:

1. Short tool change time

2. The tool has high repeat positioning accuracy;

3. Sufficient tool storage;

4. The tool magazine takes up less space.