Introduction of Press Machine
There are many types of press machines in the sheet metal manufacturing industry.
It can also be called a forming press or a mechanical press.
After the workpiece is designed, the operator can use the press machine to manufacture the workpiece.
The press machine uses pressure to bend and press the sheet metal.
A press machine is a machine used for sheet metal processing. It usually has a frame and a base.
The press machine is also provided with punches and dies, which are respectively installed on the ram and the workbench.
The press machine applies pressure to the metal plate by driving the punch through the power device.
Press machines can be divided into different types according to the power system, capacity, etc.
Different press machines process the workpiece through different dynamic mechanisms.
The structural design of the press machine includes the C-frame press, screw press, etc.
There are many kinds of press manufacturing processes, such as die cutting, forging, and stamping.
The power sources of the press include hydraulic, pneumatic, and mechanical.
In this article, we will introduce the definition of the press machine and different kinds of press machines.
The Driving System of Press Machine
The driving system of the press machine is an important device to drive the machine to work.
The hydraulic press machine drives the ram movement through the hydraulic cylinder and the piston rod.
It is generally installed on both sides of the press machine to drive the ram to move upward and downward.
The hydraulic system can continuously withstand large tonnage loads and longer strokes.
The mechanical drive system includes the crank, flywheel, eccentric, knuckle joint, etc.
The flywheel rotates and moves to connect the crank to drive the movement of the ram.
The mechanical driving force at the end is very strong, which is very suitable for blanking and stamping.
The power of the pneumatic press machine comes from the movement of compressed air.
The structure of the pneumatic press machine is relatively simple, and it only generates pressure through compressed air.
The advantage of the pneumatic press machine is that it is fast and can drive the ram quickly.
Types of Press Machine
Press machines can be classified according to different standards, including mechanical (hydraulic, pneumatic, etc.); Stamping (forging, punching, etc.).
Manual Press Machine
A manual press machine is a machine operated manually by the operator.
The operator applies pressure to the machine through the handle.
After the handle is rotated, the ram moves up and down.
The machine generates force through the lever to drive the punch to make a linear motion.
The hydraulic cylinder generates high pressure and slowly drives all components
of the punch and die process of the workpiece.
The manual press machine is suitable for small batches and simple production.
It can be used for bending, blanking, and punching.
The structure of the whole machine is very simple, including C-frame, punch, die, handle and guide rail.
The larger the opening of the C-shaped frame, the better the feeding of metal plates.
It has an independent hydraulic system, which has the features of small volume, and low operating cost.
The manual press machine is very slow and suitable for one-time and light operation.
Hydraulic Press Machine
Hydraulic press machine drives the ram through a series of components of the hydraulic system.
The oil cylinder of the hydraulic press machine is generally installed on the top beam.
The circuit flow and oil quantity of the hydraulic system determine the speed of the ram.
Just install different punches and dies, and the machine can work.
To protect the safety of the operator, the hydraulic press machine is equipped with sensing devices and safety switches.
The hydraulic press machine has a larger capacity, longer stroke, and adjustable tonnage.
Thanks to the hydraulic system, the speed, and stroke of the hydraulic press are very stable.
This is beneficial to the process monitoring system and the sensing system.
Therefore, the hydraulic press machine is also more suitable for manufacturing complex workpieces.
The hydraulic press machine is suitable for forming, forging, punching, and other sheet metal processes.
The disadvantage of the hydraulic press machine is that it will leak oil, smell, make noise and generate a lot of heat.
At the same time, the use cost and maintenance cost of the hydraulic press machine is relatively high.
Mechanical Press Machine
Mechanical press machines include various machines, which use mechanical energy to process sheet metal.
The power source of the mechanical press machine is the motor, which transfers the energy to the ram.
The speed of a mechanical press machine is faster than that of a hydraulic press machine.
The mechanical press machine is very suitable for stamping.
It is characterized by rapid and repeated application of pressure within a limited stroke.
The stroke of the mechanical press machine is unstable because the force is applied at different speeds.
So the mechanical press machine is not suitable for manufacturing complex workpieces
At present, the press capacity of the mechanical press machine can reach 12000 tons.
The mechanical press machine can provide fast and repeatable operations and reduce the cost of mass production.
Pneumatic Press Machine
The power source of the pneumatic press machine is compressed gas.
The gas in the pneumatic press machine is compressed and expanded to increase the pressure in the cylinder.
The pressure of the pneumatic press machine in the whole stroke is consistent, and there is no need to adjust the pressure.
The pneumatic press machine moves faster and can quickly carry out multiple cycles.
The aperture of the cylinder and the regulated working pressure determine the maximum force of the pneumatic press machine.
The pneumatic press machine must maintain the operating pressure during use.
Otherwise, the stroke of the press will be intermittent, which is not conducive to process monitoring.
At the same time, pneumatic check valves and shaft locking devices are also required to prevent air supply failure.
This will ensures stroke accuracy and operator safety.
The pneumatic press machine is suitable for cutting, bending, punching, and extrusion.
Punching Press Machine
The working principle of the punching press is very simple.
The punching press is used for punching the workpiece in the sheet metal technician.
It can be used to cut the hole and form sheet metal.
The forming technology of the punching press includes blanking, punching, perforating, and bending.
Punching machines have punches and die of different sizes and shapes.
During processing, the plate is placed under the punch, and the pressure of the machine causes the punch to move downward.
The punching press machine has C-frame and H-frame.
The C-frame drives the ram through the hydraulic cylinder to drive the punch for operation.
H-frame is to place the metal plate in the center of the machine without protruding.
The C-shaped frame occupies less space and is flexible to use; H-frame is suitable for large-scale manufacturing.
Stamping Press Machine
The stamping press machine performs metal forming by applying pressure to a metal sheet.
The punch and the work table of the press are a kind of interlocking devices, which can fix the plate between the devices.
In this way, the stamping press machine can cut or punch the metal plate into the final profile.
The size of the stamping press machine is very large, and the operation is complex, so it needs very large power to provide the driving force.
The surface of the workpiece produced by the stamping press machine is defective and the punching hole is not clean enough.
The stamping machine only forms the metal sheet, but the details are not handled well.
Precautions When Selecting A Press Machine
The press machine is widely used in the sheet metal processing industry and has powerful functions.
The press machine can be used for cutting, bending, stamping, forming, and other metal processing.
It is necessary to understand the function and use of the press machines before making a choice.
Selecting an inappropriate press machine leads to a waste of resources and low machine efficiency.
Press machines play a very important role in the sheet metal industry, and their functions almost meet the requirements of all metal manufacturing.
Press brake and panel bender are the most effective machines for workpiece bending in the sheet metal industry.
ADH has 20 years of professional experience in the field of sheet metal machine production.
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