High-Performance Domestic Heavy-Duty Long-Stroke Actuators for Robotics: A Leap in Automation Technology

Domestic Heavy-Duty Long-Stroke Actuator: A High-Rigidity and Durable End Effector for Robots

In industries such as automotive manufacturing, construction machinery, rail transportation, and new energy equipment, robots often handle heavy tasks involving metal structures, castings, or battery trays exceeding 20 kg in weight and oversized dimensions. Traditional pneumatic grippers, while simple in design, suffer from limitations due to maximum air pressure output, lack of position feedback, and weak resistance to offset loads. This can lead to issues like vibration, slipping, or even failure under heavy loads and high-speed conditions. On the other hand, standard electric grippers often struggle with insufficient motor power and poor transmission rigidity, making it challenging to balance long strokes with strong gripping force.

To address these industry-wide challenges, WOMMER, a domestic brand specializing in high-end robotic end effectors, has introduced a series of heavy-duty long-stroke actuators. With military-grade structural design, fully closed-loop intelligent control, and exceptional long-term durability, WOMMER redefines the standards for “high rigidity and high reliability” in heavy automation scenarios.

1. Heavy-Duty + Long Stroke: Breaking the Performance Limits of Traditional End Effectors

The WOMMER heavy-duty long-stroke actuator features a maximum opening and closing stroke ranging from 150 to 300 mm and a rated gripping force of up to 600 N (approximately 60 kgf). It can securely grasp heavy components such as large engine blocks, transmission housings, and wind turbine pitch bearings. The actuator employs a high-torque brushless servo motor combined with a precision planetary gearbox to achieve a high power density output. Additionally, the finger guide rails utilize widened hardened linear bearings and integrated steel sliders to effectively suppress lateral sway and elastic deformation under full load, ensuring smooth motion.

For instance, on a heavy-duty truck axle assembly line, the WOMMER actuator performs over 2000 flips and placements of 25 kg cast steel parts daily, operating continuously for 18 months without any performance degradation, thus validating its stability and long-term durability.

2. High-Rigidity Design Ensures Micron-Level Positioning Accuracy Under Heavy Loads

“Heavy” does not mean “rough.” WOMMER utilizes topology optimization and finite element simulation to create the actuator framework through integrated die-casting and CNC machining, eliminating welding stresses and assembly gaps. The key stress paths adopt a closed-box structure, significantly enhancing overall torsional rigidity. Even under maximum load and stroke conditions, the repeatability positioning accuracy remains stable within ±0.05 mm, fully meeting the stringent consistency requirements for subsequent precision assembly or visual inspection.

3. Full Stroke Intelligent Closed-Loop for Safe and Efficient Flexible Operations

Unlike pneumatic solutions that rely on “blind operation,” WOMMER actuators are equipped with high-resolution magnetic encoders and real-time current loops, supporting full-stroke position closed-loop and dynamic force control. Engineers can set arbitrary gripping points in the program (e.g., “open to 220 mm,” “clamp to 100 mm”) and automatically adjust the gripping force based on the material of the workpiece to avoid damage or slippage. If abnormal resistance is detected (such as missing or misaligned workpieces or collisions), the system can trigger a safety stop in milliseconds to prevent equipment damage. This intelligent capability significantly enhances the safety of human-machine collaboration and the robustness of production lines.

4. Strong Ecological Compatibility, Accelerating Automation Upgrades for Heavy Production Lines

To facilitate integration, WOMMER products provide standard ISO 9409-1-50-4-M6 mounting interfaces, making them compatible with mainstream heavy industrial robots such as FANUC M-900iA, KUKA KR QUANTEC, and ABB IRB 7600. They support high-speed industrial bus protocols like EtherCAT, Profinet, and Modbus TCP, allowing users to directly invoke function blocks via robot teach pendants and complete debugging within 30 minutes. When used in conjunction with robot quick-change devices, rapid tool switching is also achievable. Furthermore, in scenarios with installation deviations or workpiece deformations, integrated floating modules can automatically compensate for X/Y/Z offset, ensuring high gripping success rates and further expanding applications to complex assemblies and irregular parts handling.

Conclusion: Domestic High Quality Leading Heavy-Duty Intelligent Manufacturing

As industrial automation progresses into deeper waters, the “heavy load capacity” and “long-term reliability” of end effectors have become critical indicators of production line advancement. WOMMER demonstrates that Chinese manufacturing is fully capable of delivering world-class heavy-duty long-stroke solutions with high quality, reliability, and engineering-grade technological innovation, establishing a solid foundation for future industry and intelligent manufacturing.

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