Servo-Hydraulic Press

1. Programmed Idle Stroke and Precision Approach Phase: After equipment startup, the servo motor drives the oil pump to output a specific flow rate according to the preset program, propelling the moving crossbeam to execute a programmed idle stroke descent. Its speed can be set to multi-stage adjustable, achieving an optimized “fast-slow-fast” motion trajectory that significantly shortens cycle time. As the mold approaches the workpiece, the system executes a precision approach at ultra-low noise and micro-motion speeds, achieving “soft contact” to effectively protect the mold and precision preform while virtually eliminating impact.

2. Multi-stage Pressing and Dynamic Holding Pressure Phase: This represents the core performance of servo hydraulic presses. The system strictly executes precise multi-stage pressure and multi-stage speed control according to process requirements. For example, in powder metallurgy, it can perform low-speed pre-pressing, followed by high-speed stamping, and finally high-pressure finishing. In precision drawing applications, it can dynamically adjust holding force and drawing speed in real time. In processes requiring pressure holding, traditional constant-power overflow pressure maintenance is replaced by servo motor-driven “static pressure holding” through dynamic torque adjustment and minimal angular displacement. This consumes minimal energy to maintain constant pressure, completely resolving the high energy consumption and elevated oil temperatures inherent in conventional hydraulic presses during the pressure holding phase.

3. Intelligent Pressure Relief and Efficient Return Cycle: Upon pressure hold completion, the servo motor reverses direction to execute precise, controlled gradient pressure relief, perfectly preventing workpiece deformation or internal damage caused by sudden pressure release. Subsequently, the moving crossbeam rapidly returns along an optimized speed curve according to program settings, while the servo motor enters energy regeneration mode, converting kinetic energy from braking into electrical energy fed back to the grid. Workpiece ejection actions can also be integrated into this intelligent cycle, achieving efficient, smooth, and low-noise operation throughout the entire process.