The PCB fine piercing system is a system that is used to produce the printed circuit boards (PCB), the small and lightweight components that are commonly applied for the electronic devices, such as in the medical, aerospace, or military industries, etc.
The PCB fine piercing system is equipped with several practical features that allow for the optimal efficiency and precision of the works, in order to manufacture the products with high quality and durability.
Piercing refers to the process that the special tool on the press machine, which is the blanking punch, compresses the workpieces, which are usually sheet metals, and interacts with the upper and lower dies, in order to create holes on the sheet meals for the purpose of fabricating the sheet metals depending on the required geometries.
The materials that are suitable for being machined with a press machine, as the above paragraph has mentioned, are usually sheet metals, which are thin enough to receive the compressive force from the tool and allow for the holes to be made. In other words, this type of machine makes the use of the yield strength and tensile strength that the sheet metals have, to form the required products.
The PCB fine piercing system is specialized in producing the printed circuit boards, which requires the definite accuracy and precision during the manufacturing process, since these products that come in small sizes make a big difference for the applications that they serve for.
The PCB fine piercing system is a hydraulic powered device that allows for either manual or automatic operation when the system is in use, and this system comprises the power unit, hydraulic pump, die clamps, automatic die change unit, and piercing plate.
● Power unit
The power unit is an individual unit that is set beside the piercing station, which is connected to the working site with a hose. On the front of the unit, it is equipped with gauges and knobs that allow for the operators to supervise and adjust the pressure that is given during the processes.
The power unit provides the power source, which is obtained from the hydraulic pump, for other components in order to facilitate the smoothness of the processes, including clamping the dies, holding the works, piercing on the plate, and stripping.
● Hydraulic pump
The hydraulic pump, which is driven by air pressure, helps deliver the power source to the working site through the power unit, which ensures the stability of the dies when they are clamped during the process, and the sufficient power supply for the piercing work.
● Die clamps
The die clamps are the components that are fitted into the T-slots of the dies, in order to secure the dies when they are applied during the piercing process. In order to accommodate the different requirements, these clamps can be flange-mounted or automatic slid. The former allows the clamps to be bolted onto the bolster, and the latter benefits the automatically operated form of the PCB fine piercing system.
● Automatic die change unit
This unit is available for the automatically operated form. It is capable of automatically changing the dies quickly and precisely, which enables the increasing of efficiency.
● Piercing plate
The piercing plate can be regarded as the tool that conducts the piercing work on the printed circuit boards. It is in combination with the clamps that hold on the boards and dies, and driven by the hydraulic pump through the power unit, so as to achieve the forming of the printed circuit boards.
To produce the printed circuit boards with the PCB piercing system, there are four steps that would be followed by the piercing plate and other components that controls the tools, including hold-down, piercing, holes forming, and stripping.
The hold-down force that is provided by the power unit is to hold the board that is supposed to be pierced in between the upper die and the lower die.
Once the board is positioned in place, the piercing plate would compress the upper die and provide the compressive force to the board and the lower die.
3. Holes forming
As the piercing force reaches the yield strength of the material that makes up the board, the holes can be formed on the board, which facilitates the fabrication of the board.
When the force is kept from the piercing plate and achieves the tensile strength of the material, the pierced parts would start to fracture. At that time, the upper die and the lower die is removed out of the board, and the processes are completed.
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