l. Tighten the switch of the manual hydraulic pipe bender, and apply lubricating grease to the contact part of the supporting wheel and the mold with the workpiece.
2. According to the size of the pipe to be bent, select the corresponding bending die and install it on the top of the piston rod, and place the corresponding size slots of the two supporting wheels facing the bending die. Pay special attention to the corresponding size of the supporting wheel should be placed on the edge of the wing plate. Inside the hole, "large size outer hole. And so on. To avoid asymmetrical position of the two supporting wheels, causing damage to the mold and machine parts.
3. After placing the workpiece, cover the upper wing plate, first use the fast pump to press the bending die to the workpiece, and then use the slow pump to press the workpiece to the required angle. After bending, turn on the switch, and the working piston will automatically reset and open. On the wing plate, take out the workpiece.
4. Precautions for manual hydraulic pipe bender:
1. Before using manual hydraulic pipe bender, first check whether the oil in the oil tank is sufficient, and if it is insufficient, fill it up.
2. The switch before work—must be shut down; otherwise, the pressure cannot be reached, and the refueling screw plug is loosened to allow the fuel tank to ventilate.
3. The outer diameter of the pipe to be bent must fit the groove of the bending mold, otherwise the workpiece will be concave and the mold will be cracked.
4. The welding seam of the welded pipe should be on the outside or inside of the bend. During the bending process, the two supporting wheels should rotate at the same time and the workpiece should slide in the groove of the supporting wheel. If one side does not move, stop the operation.
5. The manual hydraulic pipe bender should do the cleaning and maintenance work of the equipment at ordinary times. The oil must be cleaned. It must be filtered by a filter screen above 80 mesh, and the oil filter device must be cleaned regularly
6. The manual hydraulic pipe bender uses No. 15 mechanical oil.