How to commission a servo hydraulic press?

As a high-precision hydraulic device, a servo hydraulic press requires a rigorous commissioning process during actual operation to ensure it delivers optimal performance and achieves the desired production results. Commissioning a servo hydraulic press is a systematic undertaking involving multiple aspects, including hardware installation and adjustment, software configuration and debugging, and system parameter tuning. Proper commissioning not only guarantees the equipment's normal operation but also extends its service life and reduces the failure rate.

I. Preparatory Work for Servo Hydraulic Press Commissioning
Before formally commencing the commissioning of the servo hydraulic press, a series of preparatory tasks must be completed to ensure the process proceeds smoothly. These preparatory tasks primarily encompass the following aspects:
1. Inspection of Equipment Installation
The first step is to inspect the installation status of the servo hydraulic press to ensure that the equipment has not sustained any damage during transport or installation, and that its installation location and foundation meet the specified requirements. Specifically, the following points must be verified:
Hydraulic System: Check whether the hydraulic pipeline connections are secure and if there is any risk of leakage. Verify that the selected hydraulic oil meets the equipment's specifications and that the oil tank has been filled with a sufficient quantity of hydraulic oil.
Electrical System: Inspect the electrical wiring connections to ensure they are correct, verify that the electrical control cabinet is functioning properly, and confirm that the power supply is stable and reliable.
Mechanical System: Inspect various mechanical components—such as the cylinder body, piston, and worktable—to ensure they are installed correctly and to check for any loose parts or obstructions caused by foreign objects.
2. Inspection of Hydraulic Fluid and Oil Quality
The hydraulic system of a servo hydraulic press places stringent demands on the quality of the hydraulic fluid; therefore, it is essential to inspect the fluid's cleanliness, viscosity, and temperature to ensure compliance with the equipment's operational standards. Substandard fluid quality can lead to unstable hydraulic system performance and may even result in equipment damage.
Fluid Cleanliness: The hydraulic oil must be clean; the oil tank and filters should be inspected regularly to prevent impurities or air from entering the fluid.
Fluid Viscosity: Ensure that the viscosity of the hydraulic oil aligns with the equipment's design specifications; viscosity levels that are either too high or too low can adversely affect the hydraulic system's response speed and pressure stability.
Fluid Temperature: During the commissioning process, the temperature of the hydraulic oil must be monitored; excessively high oil temperatures can compromise system efficiency and accelerate component wear. 

3. Inspect the Electrical Control System
The electrical control system of a servo hydraulic press comprises components such as the servo drive, motor, sensors, and PLC controller; ensuring that these components are correctly installed and free from damage is of paramount importance. Prior to commissioning, verify that the wiring of the electrical control system is intact, that proper grounding has been established, and that the sensitivity of the sensors meets the design specifications.
4. Inspect All Safety Devices
Safety is paramount for a servo hydraulic press—particularly during the commissioning phase—making it essential to verify the efficacy of all the equipment's safety devices. Check to ensure the equipment is equipped with safety features such as emergency stop switches, overpressure protection, and overload protection, thereby guaranteeing that the machine can be shut down rapidly in the event of a malfunction to prevent accidents.

II. Preliminary Startup and System Verification of the Servo Hydraulic Press
Once all preparatory tasks have been completed, the preliminary startup of the servo hydraulic press may commence. The objective of this stage is to conduct basic inspections of both the hydraulic system and the electrical control system to confirm that they are functioning correctly. The steps for the preliminary startup are as follows:
1. Electrical System Inspection
Inspect the Control System: Prior to startup, verify that the PLC program has been loaded correctly and ensure that the settings for the servo drive, sensors, input/output devices, and other components are accurate and error-free. Subsequently, energize the control cabinet and test each input and output signal to confirm proper operation.
Adjust the Servo Motor: Energize the servo motor and perform a low-speed operational test to ensure the motor runs smoothly, without any abnormal noises or signs of overheating. At this stage, also verify that the motor's direction of rotation is correct.
Inspect System Indicator Lights: Ensure that all indicator lights are functioning normally and that warning lights accurately display system anomalies in a timely manner.
2. Preliminary Hydraulic System Testing
Pressure Testing: Before activating the hydraulic system, first perform a low-speed idle run check of the oil pump to ensure there are no abnormal noises, oil leaks, or signs of overheating. Then, gradually increase the system pressure while observing the pressure gauge readings to confirm their stability.
Inspect Hydraulic Fluid Flow: Observe the flow rate and pressure fluctuations of the hydraulic fluid to ensure it is free of air bubbles or contaminants. Should any issues be detected, immediately shut down the machine to inspect the system for potential leaks or blockages.
Inspect Hydraulic Cylinder and Valve Actuation: At a low operational speed, gradually test the extension and retraction movements of the hydraulic cylinders. Observe their motion to ensure it is smooth and uniform, verifying that the cylinders are free from issues such as sticking or misalignment. Concurrently, verify whether the opening and closing of various valves function normally and whether they respond correctly to control signals.
3. Preliminary No-Load Operation Test
Once the hydraulic system has successfully passed the basic inspections, a no-load (idle) operation test may commence. During this phase, ensure that all movements are fluid and that the system exhibits no abnormal noises or vibrations.
System Operational Stability: Observe whether the servo hydraulic press operates smoothly under various working conditions—particularly during high-speed movements and gradual deceleration—to ensure the equipment exhibits no stuttering or jittering.
Servo Control Response Test: By adjusting the servo system parameters, test the servo drive system's adaptability to loads, ensuring that it responds rapidly to changes in load conditions.

III. Parameter Adjustment and Fine-Tuning of the Servo Hydraulic Press
Once preliminary testing reveals no anomalies, the process proceeds to the formal stage of parameter adjustment and fine-tuning. The objective of this stage is to optimize the operating parameters of the servo hydraulic press, thereby enabling it to achieve its optimal operational state.
1. Adjustment of Servo Motor Control Parameters
The core of the servo hydraulic press lies in the control of its servo motor. By adjusting the servo motor's parameters, key performance indicators—such as the hydraulic press's response speed, operational precision, and energy efficiency—can be modified.
Speed and Acceleration Adjustment: Based on actual process requirements, the servo motor's acceleration and speed are adjusted to ensure that the equipment does not generate excessive impact forces during startup and shutdown.
Position Control Precision: The feedback mechanism of the servo control system is adjusted to ensure that the displacement precision of the hydraulic cylinder meets predetermined specifications. Insufficient precision may lead to dimensional instability in the manufactured products.
Torque and Pressure Adjustment: The servo motor control system can adjust output torque and pressure in response to varying load conditions, ensuring that the equipment maintains a constant output power throughout the operation.
2. Pressure Adjustment of the Hydraulic System
The pressure within the hydraulic system is a critical factor influencing the performance of the servo hydraulic press; adjusting this pressure directly impacts the equipment's forming capability and operational precision.
Pressure Balance Adjustment: By adjusting components such as proportional valves and pressure-reducing valves, the uniform distribution of pressure throughout the system is ensured, thereby preventing excessively high or low pressure in any specific section.
Pressure Adjustment Sensitivity: The response speed of the system pressure is adjusted according to varying process requirements, ensuring that the equipment can rapidly adapt to pressure fluctuations occurring during the production process.
3. Hydraulic Oil Temperature and Flow Control
The temperature and flow rate of the hydraulic oil are pivotal factors affecting the efficiency and stability of the hydraulic system. During the commissioning process, particular attention must be paid to the regulation of oil temperature and flow.
Flow Rate Adjustment: The flow rate of the hydraulic pump is adjusted according to actual requirements to meet the demands of different operating conditions, avoiding instances of excessive or insufficient flow.
Temperature Control: The hydraulic oil temperature is regulated via the oil cooling system to ensure it remains within an appropriate range. If the oil temperature becomes excessively high, the issue can be resolved by installing additional cooling devices or by adjusting the flow rate of the cooling water.
4. Precision and Repeatability Tuning
The high precision and high repeatability of the servo hydraulic press constitute one of its primary advantages. During the commissioning process, particular emphasis is placed on testing for precision and repeatability to ensure that the equipment maintains consistent processing results under varying conditions.
Positional Accuracy Testing: Using precision measuring instruments, the displacement accuracy of the hydraulic cylinder is tested under various loads and operating conditions to ensure that any deviation remains within the permissible design tolerance.
Repeatability Testing: The equipment's repeatability is tested during continuous operation to ensure that the servo hydraulic press maintains consistent performance across multiple operational cycles.

IV. Post-Commissioning Trial Production and Performance Verification
Once all parameter adjustments have been finalized, the servo hydraulic press proceeds to the trial production phase. During this stage, actual production runs are conducted to verify the equipment's stability and production efficiency under various operating conditions.
1. Trial Production
Through limited-scale trial production, the performance of the servo hydraulic press is evaluated under normal operating conditions, with particular attention paid to product quality, processing precision, and production efficiency.
2. Performance Verification
Finally, a systematic performance verification is conducted to ensure the equipment's long-term stability—specifically assessing its performance under demanding conditions, such as high-load and high-speed operations.