A tool changer and end effector system is a critical subsystem of automated assembly stations. It enables robotic arms to automatically exchange different tools—such as grippers, screwdrivers, welders, or dispensers—and to utilize specialized end effectors for performing various assembly, handling, or processing tasks. This capability enhances the flexibility and efficiency of automated production lines by allowing a single robot to execute multiple operations without manual intervention. The tool changer typically employs a mechanical coupling system, often pneumatic, hydraulic, or servo-driven, with a locking mechanism to securely attach and detach tools. The end effector, mounted via the changer, performs the specific task (e.g. gripping, fastening). Control signals from the station's PLC coordinate the exchange and operation based on the assembly sequence. Key parameters to consider when selecting such a system include operating pressure (1.0–1.6 MPa), payload capacity (5–150 kg), repeatability (±0.05 mm per ISO 9283), tool change time (0.5–2.0 s), electrical contacts (4–24 pins), pneumatic ports (2–8), operating temperature (-10–60 °C), IP rating (IP54–IP65 per IEC 60529), weight (0.5–15 kg), locking force (2–20 kN), and supply voltage (24 V DC ±10% per IEC 61131-2). Materials commonly used include aluminum alloy, steel, and engineering plastics. These values are reference ranges; actual specifications must be confirmed with the legal manufacturer or supplier for the specific model and application. Always verify model-specific values and standards with the manufacturer or supplier before procurement.
The tool changer uses a mechanical coupling system (often pneumatic, hydraulic, or servo-driven) with a locking mechanism to securely attach and detach tools from the robot arm. The end effector, mounted via the changer, performs the specific task (e.g., gripping, fastening). Control signals from the station's PLC coordinate the exchange and operation based on the assembly sequence. The locking force (2–20 kN) holds the tool under load, and repeatability (±0.05 mm) ensures precise positioning. The system operates within a temperature range of -10 to 60 °C and is rated IP54–IP65 for dust and water protection. Electrical contacts (4–24 pins) and pneumatic ports (2–8) provide signal and power connections. The tool change time is 0.5–2.0 seconds.
