Hydraulic punch presses, which power the ram with a hydraulic cylinder rather than a flywheel, and are either valve controlled or valve and feedback controlled. Valve controlled machines usually allow a one stroke operation allowing the ram to stroke up and down when commanded. Controlled feedback systems allow the ram to be proportionally controlled to within fixed points as commanded. This allows greater control over the stroke of the ram, and increases punching rates as the ram no longer has to complete the traditional full stroke up and down but can operate within a very short window of stroke.
1. Before starting, check parts of press manipulation, clutch and brakes are active, the security guard is complete and easy to use, whether ministries crank exception. If abnormal, should immediately take the necessary measures 2. Before formal operating subject to idle test, be sure each part can normal work. 3. The operation must use the tools, is prohibited by hand directly into his mouth extract die, hand tool should not be putted on the mold. 4. Foot must be far away from the foot pedals, when adjust or get the workpiece in mould area. 5. Sudden power off or operate finished, we should close the power, and restored to the clutch in neutral gear manipulator, brake in braking. 6. On the press for maintenance, adjustment and installation, adjustment, dismantling the mold should be disconnected the machine energy (such as electricity, gas, liquid). Putting warning notice on the startup switches
