The hydraulic punching machine is composed of manual pump or electric pump and working head. The oil hose is connected by quick connector, which is reliable and fast. There is no directional restriction during operation. It is convenient to install and dismantle. This machine is specially used for punching metal plates such as angle iron, flat iron, copper, aluminum row, etc., especially suitable for field operation in electric power, construction and other industries. < br style = "list style type: none;" / > & nbsp; & nbsp; it is suitable for all kinds of steel, iron, copper, aluminum plate, forming steel, channel steel, I-beam, etc., with small volume, light weight, easy operation, labor-saving and fast punching. Hydraulic punching machine is a kind of split type hydraulic punching machine and integrated punching machine. Connect the oil pump and working head with quick coupling. < br style = "list style type: none;" / > & nbsp; & nbsp; select the corresponding upper and lower molds, install the upper mold first and then install the lower mold. When installing the upper mold, screw the positioning screw out of a certain position before installing the lower mold. Be sure to put it in place, and then tighten the positioning screw to operate. Put the workpiece in place, close the oil return screw of the oil pump and move the handle until the oil return screw is released after the work is finished. If the thin metal sheet is punched, the material returning pad must be inserted between the stripper and the workpiece, otherwise the workpiece will be stuck in the die. To replace the upper die, use the (black) elastic screwdriver to loosen the fixing bolt of the upper die (silver white) to the left, slowly remove the upper die, replace the required upper die, and then tighten the fixing bolt of the upper die to the right. To replace the lower die, use a small hexagon wrench to loosen the screws that fix the tightness of the lower die to the left, and then from the bottom of the lower die, use a finger or a small tool to push the lower die out from the bottom to the top. Replace the lower die matched with the upper die and tighten it with a small wrench. Note: 1. The lower die has one side of typing face up and can not face down; 2. When changing the mold, take down the upper mold to replace the lower mold.