1. Clarify the processing requirements
Material parameters
· Plate thickness: Thin plates (<6mm) use small and medium-sized equipment (such as WC67K-40T1600), medium and thick plates (6-30mm) require high-pressure models (such as WC67Y-80T2500), and thick plates (>30mm) should use large hydraulic equipment (such as WC67Y-125T3200)
· Plate length: Short materials (<1m) are suitable for small machines, and long materials (>3m) require long bed equipment to prevent deformation
Production scenarios
· Small batch/simple structure: ordinary hydraulic bending machine It can meet the requirements
·High-precision/complex parts: electro-hydraulic bending machines equipped with grating rulers and CNC systems are preferred, and their closed-loop control can achieve ±0.01mm synchronization accuracy
2. Determine the type of equipment
Synchronous structure comparison
·Torsion axis type: Mechanical forced synchronization, low cost but easy to deform due to eccentric load, suitable for low-precision requirements
·Electro-hydraulic servo type: CNC closed-loop feedback adjustment, supports eccentric load processing and stable accuracy, suitable for precision manufacturing
Drive mode selection
·Hydraulic type (NC): Suitable for high tonnage requirements, uniform pressure but high energy consumption
·Electro-hydraulic type (CNC ): Programming controls complex bending steps, increasing efficiency by more than 50%
3. Technical parameter evaluation
Core performance indicators
·Nominal pressure (tonnage): must cover the maximum bending force (calculation formula: 1.42×plate thickness²×material tensile strength/lower die opening)
·Stroke speed: The electro-hydraulic bending machine can reach a fast speed of 200mm/s, and its efficiency is higher than that of the torsion shaft type equipment
.Precision control
·Repeat positioning accuracy: CNC models should be ≤±0.01mm
·Back gauge positioning accuracy: servo motor drive can reach ±0.05mm8
4. Brand and Service inspection
Manufacturer qualifications
·Give priority to manufacturers with ISO certification, and pay attention to the configuration of the equipment hydraulic system (such as Rexroth, Yuken brand) and CNC system (such as Delem, ESA)
After-sales service
·Confirm whether free commissioning, annual maintenance package and 24-hour emergency response are provided to avoid production interruption
5. Budget and cost performance
·General hydraulic models cost about 10,000 to 20,000 US dollars, and CNC electro-hydraulic models cost about 20,000 to 40,000 US dollars. The choice needs to be based on the investment payback period
·Modular functions such as servo motors and laser protection can improve long-term benefits
