Gripper head (for pick-and-place)

A gripper head is the terminal component of a pick-and-place or pusher transfer mechanism, responsible for the direct physical interaction with the workpiece. It is mounted to the end of a robotic arm or linear actuator and executes the precise grasping, secure holding during movement, and controlled release of items. Its design is critical for handling specific object shapes, weights, and materials without causing damage, directly influencing the mechanism's reliability, speed, and application scope. The gripper head is typically actuated by pneumatic, electric, or hydraulic power, converting input force into mechanical motion to open and close its gripping elements, such as jaws, fingers, or pads. In a pick cycle, it positions itself around the target object, closes to apply sufficient gripping force to secure it, lifts or moves it, and then opens to release it at the destination. The actuation and control ensure repeatable, precise handling. The gripper head is available in various configurations to suit different applications, with materials including aluminum alloy, stainless steel, engineering plastics (e.g., POM, Nylon), and polyurethane. Key parameters to consider when selecting a gripper head include gripping force (20–200 N), stroke per jaw (4–20 mm), repeatability (±0.02–±0.05 mm per ISO 9283), operating pressure (0.4–0.7 MPa), operating temperature (5–60 °C), IP rating (IP54–IP65 per IEC 60529), weight (0.5–5.0 kg), jaw material (SUS304–SUS440C per ASTM A276), body material (6061-T6–7075-T6 per ASTM B211), mounting interface (ISO 9409-1-50-4-M6), sensor option (24 V DC ±10% per IEC 60947-5-2), and air consumption (0.1–0.5 L/cycle). These values are reference ranges and must be verified for the specific model and application. The gripper head is a component, not a complete system, and its performance depends on integration with the robot or actuator, control system, and auxiliary components. Proper selection and verification are essential to ensure reliable operation and avoid damage to the workpiece or equipment.

The gripper head operates by converting an input force (typically pneumatic, electric, or hydraulic) into a mechanical motion to open and close its gripping elements (jaws, fingers, or pads). In a pick cycle, it positions itself around the target object, closes to apply sufficient gripping force to secure it, lifts/moves it, and then opens to release it at the destination. The actuation and control ensure repeatable, precise handling. The gripping force is generated by the actuation system and transmitted to the jaws, which may be made of stainless steel or other materials. The stroke per jaw determines the range of part sizes that can be handled. The repeatability of the gripper head is critical for consistent placement accuracy, and the operating pressure and temperature must be within specified limits to ensure proper function. The IP rating indicates protection against dust and water jets, and the weight affects the dynamic performance of the robot arm. The mounting interface allows attachment to standard robot flanges, and optional sensors provide position feedback. Air consumption affects compressor sizing and energy cost.