Four column press is a machine that uses liquid static pressure to process products such as metals, plastics, rubber, wood, powder, etc.
It is commonly used in pressing processes and press forming processes such as forging, stamping, cold extrusion, straightening, bending, flanging, sheet drawing, powder metallurgy, press fittings.
Its principle is to use Pascal’s law that make use of liquid pressure transmission.
There are many kinds of it.
Of course, the use is also varied according to needs.
For example, according to the type of liquid that transmits pressure, there are two types:
- oil presses
- hydraulic presses
- With compressed air as the power source, it is highly efficient and easy to operate, with simple structure and minimal maintenance.
- There is no noise generated when the hydraulic system is in standby, which can save power consumption and reduce production costs.
- The height, speed, stroke, pressure and stamping time can be adjusted arbitrarily according to different products or molds.
- With anti-rotation guide bar and guide plate, the precision is high, and it can adapt to high-speed precision punching.
- Optional two-hand control or pedaling. Ensure the personal safety of the operator.
- Adopt microcomputer control system, the mode can be manual, semi-automatic and fully automatic. Heating molds, temperature control and pressure sensors can be added.
The machine has a simple structure and low production cost.
Using pneumatic technology, an air compressor can be used for multiple pneumatic punching machines at the same time, which is more energy efficient and reduces power consumption than electric punching machines.
The operation is simple and the safety is high.
The foot switch is used to control the solenoid valve, the structure is simple, the failure rate is low, and the production efficiency is improved.
Adapt to electronics, instruments, meters, cameras, jewelry, hardware and clothing, shoes and hats.
It can cut, punch, blank, form, bend, rive on thin plates, strips and coils.
Suitable for processing non-ferrous metals, plastic parts, etc.
At present, in the field of punching various metal and non-metal pipes and plates, electric punching machines are mostly used.
The electric punching machine not only has a large noise pollution environment, but also its complicated structural components determine its high cost, difficult maintenance, high maintenance cost, bulky body, and high power consumption.
The operation is complicated, the failure rate is high, and the safety hazard is large.
Pneumatic punch is more sanitary and clean!
With advanced optoelectronic protection technology, the safety performance can be greatly improved.
The combination of computer counting and program can realize unattended processing flow, greatly improve the efficiency of work and reduce the cost of production.
Principle of action
The compressed gas is delivered to the solenoid valve through the pipeline using the high pressure gas generated by the compressor.
The operation of the solenoid valve is controlled by the foot switch to control the operation and return of the cylinder, thereby achieving the purpose of punching.
The compressed air can be stored in the gas storage tank and taken away at any time, so the motor has no idling energy waste.
The use of a cylinder as a working component and the use of a solenoid valve as a control element make the structure of the machine simpler.
Low failure rate, high safety, simple maintenance, lower maintenance cost and high production efficiency.
The 220V power supply is used to realize the control of the solenoid valve, and the operation is simple and convenient.
Structural performance characteristics
The four-column press consists of two main parts: the main machine and the control machine.
The pipeline and the electrical system device are connected to form a complete unit, and the main part is composed of a body and a master cylinder.
The control mechanism consists of several parts: power structure, limit device, pipeline and electrical box.
The structure and role of each part are now described as follows:
① Machine body
The machine body consists of upper beam, slider, worktable, column, lock nut and adjusting nut.
The four columns are used as the skeleton, and the upper beam and the work table are fixed at the two ends by the lock nut, and the machine is formed as a whole.
The precision of the machine is adjusted by the adjusting nut. The guide sleeve of the wear-resistant material is installed in the four corners of the slider. The guide sleeve is fastened to the upper and lower end faces of the slider by the hexagon socket screws.
There is dustproof wool felt for dust protection.
The upper end surface of the slider is coupled with the flange of the cylinder rod of the cylinder, and is guided by four columns for upward and downward movement.
A T-slot is provided on the upper surface of the table and the lower surface of the slider to mount the mold.
② Master cylinder
The cylinder structure of the machine is composed of cylinder block, guide sleeve, piston head, piston rod, lock nut, coupling flange, cylinder flange.
The cylinder body is fastened in the middle hole of the upper beam by the cylinder shoulder and the large lock nut, and the lower end surface of the piston is connected with the slider by the coupling flange.
The piston head is mounted on the piston rod and is fastened by a lock nut.
Two sets of YA-type sealing rings with opposite directions are mounted on the piston head, and the oil cylinder is divided into two oil chambers to realize pressing and returning operations.
The cylinder guide bushing is mounted at the lower end of the cylinder block.
The inner hole of the cylinder guide bushing is also equipped with a YA type seal ring, and an O-ring seal is arranged on the outer circumference.
It is fastened to the end surface of the cylinder block by the cylinder flange and the hexagon socket screw to ensure the sealing of the sealing cylinder.