A CNC Machine Automatic Tool Changer (ATC) is an advanced mechanical system used in CNC (Computer Numerical Control) machines to automate the process of changing tools during machining operations. This technology significantly enhances the efficiency and productivity of CNC machines by allowing them to switch between different tools quickly and automatically, without manual intervention.
Features of CNC Machine Tool Changer
Efficiency: An ATC minimizes downtime by quickly swapping tools, enabling continuous operation and faster project completion.
Tool Storage: ATCs can hold multiple tools in a magazine or rack, making it easy to access a variety of tools without needing to manually load and unload them.
Different Types of CNC Machine Automatic Tool Changers
CNC Machine Automatic Tool Changers (ATCs) come in various designs, each tailored to specific needs and applications. The most common variants are categorized based on the shape of the magazine used for storing tools.
- Rotary Tool Holders:
- These ATCs utilize a turntable setup where each tool is held securely in place by claws. This design allows for quick and efficient tool changes, making it ideal for complex machining tasks.
- Static Racks:
- Static racks are simpler in mechanics and consist of straight rows of tools. This design is often used for operations that do not require frequent tool changes and where space is a consideration.
- Chain-Type Tool Holding Stations:
- High-end CNC machines often feature chain-type tool holders, especially when the tool count exceeds twenty or thirty. This system allows for efficient organization and quick retrieval of tools.
How the CNC Machine Automatic Tool Changer Mechanism Works
The operation of a CNC Machine Automatic Tool Changer is both systematic and efficient. Here’s how it typically functions:
- Initiating Tool Change: The process begins when the CNC machine receives a command to change tools. This can be triggered manually or automatically, depending on the program.
- Positioning the Tool: The tool that is scheduled for change moves into the designated tool change position. This ensures it is ready for a smooth transition.
- ATC Arm Operation: The ATC arm then moves into position to facilitate the change. One gripper arm picks up the new tool from the magazine while a second arm simultaneously removes the old tool from the spindle.
- Returning Tools: After the task is complete, the used tool is returned to its storage position, ready for the next operation.
