Four column hydraulic press pressing process to speed requirements have the following requirements?
For example, when the thin plate is stretched, the hydraulic cylinder rise, stop and pressure return are required. Sometimes it is necessary to press the blank with a crimping cylinder to prevent the surrounding wrinkle. The maximum pressure (tonnage) that the main actuator (main cylinder) may output in the main motion is taken as the main specification of the hydraulic press and has been serialized. The tonnage of the top cylinder is often 20% to 50% of the tonnage of the main cylinder. Extruder ejection cylinder can use the main tonnage of about l0%. The tonnage of the edge pressing cylinder of the double-action tensile four-column hydraulic press is generally about 60% of the tonnage of the tensile cylinder. The speed of the main cylinder is determined by the pressure processing technology. Generally, in the hydraulic system directly supplied by the pump, the working stroke speed is not more than 50 mm/s, the fast advance speed is not more than 300 mm/s, the fast retreat speed is equal to the fast advance speed.