What is Hydraulic Hole Punch used for?

The hydraulic punching machine is a machine composed of two parts, a hand pump or an electric pump and a working head. Hydraulic hole punch is a kind of punching machine, which can be divided into two categories: split hydraulic punching machine and integrated electro-hydraulic punching machine. The hydraulic metal hole punch can be used to punch holes in metal plates such as angle iron, flat iron, copper, aluminum row, etc. It is especially suitable for electric power, construction and other industries working in the field. The hydraulic punching machine is operated by a hand pump or an electric pump. The first part is composed of two parts. The oil delivery hose is connected by a quick connector, which is reliable in sealing, fast and safe. There is no directional restriction during operation, and it is easy to assemble and disassemble.

hydraulic punching machine application

The hydraulic punching machine widely apply in the processing of various stainless steel products, and the punching pipes are diversified, including stainless steel pipes, aluminum alloy pipes, zinc steel pipes, iron pipes, etc. Punch shapes are also diversified, such as: square hole, round hole, plum blossom hole, louver hole, flat hole, oblique hole. At the same time, it is also used in the processing of various stainless steel products, such as doors and windows, anti-theft nets, fences, stair handrails, shelves, shoe racks, etc.

Working principle of hydraulic punching machine

The working principle of the hydraulic punching machine is based on the crankshaft and connecting rod mechanism. The flywheel is driven by the electric motor. The flywheel drives the large gear through the shaft and the pinion. The large gear drives the crankshaft through the clutch. The crankshaft drives the connecting rod to make the slider work. The slider the number of strokes per minute and the movement profile of the slider are fixed.

The press can basically be divided into base part, working part, control part and transmission part. All components of each section are installed on the machine tool. The hydraulic punch press is a general-purpose press for sheet metal stamping, which can realize various cold stamping processes, such as punching, doming and shallow drawing. The hydraulic oil pump is driven by the motor, and the hydraulic oil is delivered to the hydraulic oil cylinder. According to the principle of hydraulic punch machinery, the plunger type oil cylinder is driven to make a circular reciprocating movement. With the punching needle and punching knife of the punching machine mold, the rapid punching of stainless steel pipes can be achieved.

The specific mechanical parts are as follows:

Hydraulic system Hydraulic system

To increase the force by changing the pressure. A complete hydraulic system consists of five parts, namely power components, actuators, control components, auxiliary components (accessories) and hydraulic oil. Hydraulic systems can be divided into two categories: hydraulic transmission systems and hydraulic control systems. The main function of the hydraulic transmission system is to transmit power and motion. The hydraulic control system needs to make the output of the hydraulic system meet specific performance requirements (especially dynamic performance). The hydraulic system generally refers to the hydraulic transmission system.

Hydraulic valve

Components used in hydraulic transmission to control fluid pressure, flow and direction. Among them, the one that controls pressure is called pressure control valve, the one that controls flow is called flow control valve, and the one that controls on-off and flow direction is called directional control valve.

Hydraulic cylinder

A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swing motion). It has simple structure and reliable operation. When it is used to realize reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion is stable, so it is widely used in various mechanical hydraulic systems. The output force of the hydraulic cylinder is proportional to the effective area of the piston and the pressure difference on both sides.

How to use hydraulic punching machine?

Connect the oil pump and the working head with a quick connector, and select the corresponding upper and lower dies. Install the upper mold first and then the lower mold. When installing the upper mold, first unscrew the positioning screw to a certain position and then install the lower mold. Be sure to put it in place, and then tighten the positioning screw to work.

Put the workpiece away, close the oil return screw of the oil pump, turn the handle, and then loosen the oil return screw until the work is completed. For example, when punching a thin metal sheet, be sure to insert the stripper pad between the tripod and the workpiece, otherwise the workpiece will be stuck on the upper die.

When punching is difficult, check whether the blade of the punching needle has been blunted. If the blade has been blunted, remove the punching needle and grind it or replace it.

In order to ensure that the cylinder of the hydraulic system will not leak at the piston rod of the hydraulic cylinder and the hydraulic transmission joint during daily use, we can regularly check whether there are any system joints in the hydraulic system of the punching machine in daily use. Leakage phenomenon is used to avoid leakage accidents. Once leakage is found during the inspection process, it must be repaired in time to clean the leaked oil.

Control the working temperature of the hydraulic punching system to ensure that it does not exceed 55 degrees Celsius. Once the temperature rises, the system must be cooled by water cooling method. During use, always check the oil level of the pressure oil, the pressure of the oil pump and the cleanliness of the pressure oil.

In wet weather, the concentration of the pressure oil must be checked daily, and the water pipes must be checked frequently to prevent water from mixing into the pressure oil and causing the oil filter to be blocked. Check the oil tank frequently to keep it clean and prevent debris from falling in. If the oil level is not high enough, the pressure oil should be replenished in time. Check once a week whether there is oil leakage in the lubricated moving parts and joint parts.

The hydraulic oil should be replaced in time in strict accordance with the requirements of the operating specifications of the punching machine. At the same time, the oil tank and oil filter should be cleaned to prevent the oil circuit from being blocked and the equipment not running smoothly.

Common problems and maintenance of hydraulic punching machine

Reasonable and scientific maintenance of the punching machine is the premise to ensure the efficient operation of the punching machine. Only through reasonable and effective maintenance of the hydraulic punching machine can a safe, stable and efficient production goal be achieved.

1. There is no pressure, which is generally caused by the sticking of the hydraulic valve.
2. The pressure is not in place, which is generally a problem with the stroke detection switch.
3. The quality of the hydraulic punch surface is not ideal, which is related to the mold and positioning mechanism. Set up the operating system properly. Easy mold change with quick mold change system, automatic calibration. After the mold is calibrated, insert the mold into the pipe to punch, not punching without the pipe, because it will damage the mold.
4. The hydraulic punching machine can punch holes in a single row or in multiple rows. When punching a full hole, if the hole returns automatically without being punched through, the proximity switch below can be moved down.
5. When the punching machine punches half a hole, if the hole is not pierced and returns automatically, move the middle proximity switch down, and then move the middle proximity switch up.
6. Check that the die and punch are in good condition. If the punching needle blade is blunted, it will affect the punching efficiency and punching forming effect.
7. After working for five years, it is necessary to check whether the hydraulic cylinder and oil pump are damaged, and update them in time if there is any problem. To form the habit of daily maintenance. When using a hydraulic punching machine, it is necessary to do a good job in daily maintenance. The surface needs to be cleaned frequently and there are no sundries on the body.
8. When the motor is turned on, it is necessary to frequently observe whether there is any displacement or abnormal noise. The flexibility of clamping and uncoupling of the pneumatic parts is also to be checked. Be sure to always check whether the aerodynamic effect is easy to pump, and often check whether there is any air leakage in the air hole and so on. Check whether the punching hole has reached the design target, and whether the mold is old-fashioned, etc.