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LZK independently researches and develops a variety of high-power fiber laser cutting machines with fast speed, good effect, no burrs and slag. There are a variety of power options to meet the different needs of production. A fiber laser cutting machine has greater functionality.

• What is the difference between fiber laser cutting machine and YAG laser cutting machine?

• What is the difference between CO₂ laser cutting machine and fiber laser cutting machine?

• What are the cutting advantages of fiber laser cutting machine?

What is the difference between fiber laser cutting machine and YAG laser cutting machine?

The technology of fiber laser cutting machine is higher than that of YAG laser cutting machine that the cutting quality is good and the efficiency is high. But the price is much higher than YAG's.

YAG laser cutting machine has low cost and can cut highly reflective materials, such as aluminum, copper and other non-ferrous metal materials that cannot be cut by fiber laser cutting machines. However, YAG laser cutting machine is a low-power laser cutting machine, which can only cut sheet materials below 8mm. The fiber laser cutting machine can achieve very high power in a very small package.

The resonant cavity of the fiber laser cutting machine has no optical lens so that it does not need any adjustment or maintenance.

The cutting speed of the fiber laser cutting machine is 4 to 5 times faster than that of YAG laser cutting machine. Therefore, it is available for mass production.

The photoelectric conversion efficiency of the fiber laser cutting machine is about 10 times higher than that of YAG laser cutting machine.

What is the difference between CO₂ laser cutting machine and fiber laser cutting machine?

Fiber laser cutting machines have gradually replaced CO₂ laser cutting machines and traditional processing methods.

CO₂ laser cutting machine generates the laser beam, which is transmitted through the reflector. However, fiber laser cutting machines are transmitted through diodes and fiber optic cables.

The appearance of fiber laser cutting machine is more compact due to the different laser transmission structure, thereby saving workshop space.

Due to complete solid-state digital module and single design, fiber laser cutting machine has higher electro-optical conversion efficiency. The actual utilization rate of each power supply unit of CO₂ laser cutting machine is about 8% to 10%, while fiber laser cutting machine is about 25% to 30%. It increases the energy efficiency to more than 86%.

Fiber laser cutting machine has the characteristics of short wavelength, which improves the absorption of the cutting material to the beam. It enables to cut materials like brass, copper and non-conductive materials.

Due to the purity of the CO₂ gas, the resonant cavity of the CO₂ laser cutting machine will be polluted and needs to be cleaned regularly. The reflect mirror needs to be maintained and calibrated. Fiber laser cutting machine is environmental-friendly.

What are the cutting advantages of fiber laser cutting machine?

The positioning accuracy of the fiber laser cutting machine is 0.05mm and the repeat position is 0.03mm.

The fiber laser cutting machine has a narrow slit. The laser beam is focused into a small spot so that it can reach a high-power density.

The cutting surface of the fiber laser cutting machine is smooth that there are no burrs.

The cutting speed can reach 10m per min, which is much faster than others.

The fiber laser cutting machine has good cutting quality. The cutting edge is little affected by heat without thermal deformation of the workpiece. The collapse of the material formed during punching and shearing is completely avoided.

Learn more something about fiber laser cutting machine can know the difference between CO₂ laser cutting machine, YAG laser cutting machine and fiber laser cutting machine. LZK CNC Machine Tool(Anhui) Manufacturing Co., Ltd. can help you to resolve your problems.

Bending is a processing technique of deformation and forming after shaping. It is performed industrially with press brakes. Press brake can perform rectilinear and parallel folds on pieces of medium-large dimension. The minimum radius relies on the thickness and type of material to be bent.

• Why we use press brake?

• How does press brake work?

• What are the uses of press brake?

Why we use press brake?

Press brake uses the electro-hydraulic servo system to control the two-cylinder synchronization. Press brake cooperates with the international standard grating ruler to form a fully closed-loop control. The synchronization has high accuracy and high level of the bending and repeat accuracy.

Press brake can be equipped with hydraulic upper mold automatic clamp, quick clamp, or slot type lower mold to reduce the labor and improve efficiency.

Press brake is equipped with high-quality linear guides and ball screws to ensure the accuracy.

Press brake has flexible operation mode, not only solving the processing of ultra-long plates by dual-machine linkage, but also processing short parts by single-machine operation. Press brake improves the utilization rate and reduces energy consumption.

The frame of press brake is welded with steel, ensuring high rigidity and machining accuracy.

How does press brake work?

To avoid cracks on the radius, it is essential that the press brake is carried out orthogonally to the rolling direction.

The press brakes are controlled by mechanical systems, a crank connecting rod system, and hydraulic pistons. Press brake can be operated by manually or computer, called CNC press brake.

The metal sheet is deformed by a bending force of press brake which necessarily exceeds the limit that the elasticity of the material imposes.

Also, the press brakes are equipped with a punch mounted on the movable part. This part of press brake is composed of a die and a blank holder piston with the same functions and characteristics of a mold for a press.

Press brakes contain a work table, a clamping plate, and supporters. The worktable consists of a base and a pressure plate, which is attached to the supporters. As working with a press brake, adjust the bending angle and dimensions continually.

What are the uses of press brake?

The forming of press brake greatly depends on operator’s skill. Therefore, varying levels of quality and productivity are to be achieved by two different operators.

Press brake is available for bending sheet metal. The sheet metal will play a important role in the manufacturing industry. These sheet metals processed by press brake are used in home appliances, vehicles, heavy equipment.

Before the right sheet metals are formed, press brakes should first consider the right die design to produce the right sheet metal. Press brakes are used in different forming works with the right die design like V dies, rotary bending dies, acute angle dies, and radius dies.

In a mechanical press brake, power is added to a flywheel with an electric motor. A clutch matches the flywheel to power a crank mechanism moving vertically. Accuracy and speed are two advantages of the mechanical press brake. Hydraulic press brake operates by means of two synchronized hydraulic cylinders on the C-frames moving the upper beam.

Learn more about press brake can know the working principle of press brake and the uses of press brake. LZK CNC Machine Tool(Anhui) Manufacturing Co., Ltd. can do a favor for you if you have any doubts.

Press brake is a mechanical or hydraulic machine for bending sheet metal and plate material, which is common in engineering workshops. Press brake requires different methods of approach to achieve the desired results. From forming wind tower poles to intricate electrical cabinet components, press brakes are a vital tool.

• What are the common faults of press brake?

• How to avoid electric leakage when the press brake is working?

• Why there are errors when using press brake?

What are the common faults of press brake?

Press brake makes poor surface roughness of the workpiece. The tool tip of the press brake is damaged that is not sharp. The press brake resonates leading to the unstable placement. The press brake has a crawling phenomenon, resulting in poor processing technology.

The workpiece produces taper-size head. The level of the press brake is not adjusted properly that one side is high and the other is low, resulting in uneven placement. When turning the long shaft, the material fed is too hard to be cut deeper. The tailstock thimble and the spindles are not concentric.

The size of each workpiece is inconsistent. The carriage of the press brake runs at high speed for a long time, resulting in the wear of the screw and bearing. The repeated positioning accuracy of the tool holder produces deviations during long-term use. The carriage can accurately return to the starting point of processing every time, but the size of the processed workpiece is still changed. It is generally caused by the main shaft, caused by the high-speed rotation to wear.

How to avoid electric leakage when the press brake is working?

For the press brake, it is inevitable that there will be leakage in the working process. If the leakage is not handled in time, it will damage to safety.

In order to avoid the occurrence of electric leakage when the press brake is working, the press brake must be equipped with a leakage protector, it is a current-driven leakage maintenance device, which has a good effect on the protection of the press brake.

When operating the press brake, if the insulation of the electrical installation equipment is damaged, the cover will be charged. The correct grounding and zeroing work must be done. The electrical installation of the press brake should be maintained with high-voltage grounding to reduce the risk of electric shock.

The wiring operation of the press brake is also very simple. It is enough to connect the metal shell and the common maintenance neutral line firmly. Lead out from the neutral line on the power side of the leakage maintainer. Under the protection of its maintainer, the press brake can maintain a good and stable situation.

Why there are errors when using the press brake?

The outer circle of the bend is a cone. The connection between the front and rear centers is not coaxial with the spindle axis, which is caused by the wrong position of the tailstock center of the press brake.

The workpiece vibrates when bending. It may be that the tailstock sleeve of the press brake extends too long or the support of the workpiece is too loose. The mold is not sharp enough or the arc is too large. The bearing clearance of the rotary center is large. The clearance of the medium and small sliding plates is too large.

The mold does not meet the requirements. The mold and the main shaft axis of press brake are not on the same axis. The circular runout caused by the wear of the bearing. The center hole of the workpiece is not cleaned or is fuzzed. The center hole does not work because the lever in the center of the mold touches the end face of the chuck.

Learn more about press brake can know the faults of press brake. LZK CNC Machine Tool(Anhui) Manufacturing Co., Ltd. is equipped with many professors and advanced equipment.

An efficient press brake is fundamental to avoiding damages and detecting failures. Keeping press brake clean and tidy is simple but important. It should be done the daily, weekly, monthly, and yearly.

• Why does press brake leak oil?

• What should you do for oil of press brake?

• What is the role of oil of press brake?

Why does press brake leak oil?

The sealing ring is not suitable for the conditions of using press brake. The O-shaped rubber seals often used in press brake must be selected according to the operating conditions and working conditions. Under oil lubrication conditions, the hardness of the oil-resistant rubber O-ring seal can be low hardness when the oil pressure is less than 2.9MPa. When the oil pressure is 2.9 to 4.9MPa, medium hardness should be selected. When the oil pressure is 4.9 to 7.8MPa, select high hardness.

There is no design seal or unreasonable seal structure. The screw hole on the body of the press brake is designed as a through hole with no sealing measure. The press brake cover is not designed with a gasket. The clearance between the shaft and the body hole is too large. The interference between the sealing ring and the shaft does not meet the requirements. The design of sealing groove is unreasonable.

Oil leakage can be caused by casting defects and parts damage. The castings of the press brake have defects such as blisters, pores, cracks, and loose tissues. When the oil pipes and pipe joints of the press brake are made of plastic or oil-resistant rubber, the materials will age to become hard and brittle after long-term use. The moving parts will lose the sealing performance due to friction and wear. If the gap between the shaft and the shaft hole increases, it will also cause oil leakage.

What should you do for oil of press brake?

Before maintaining or cleaning, the upper mold should be aligned with the lower mold. Shut down until the work is completed. If you need to start press brake, select the manual mode to ensure safety.

Check the oil level of the oil tank every week, even after the hydraulic system is repaired. If the oil level is lower, add hydraulic oil. The oil should be changed after 2000 hours of operating new press brake. Afterwards, the oil should be changed after 4000 to 6000 hours of operating press brake. The oil tank should be cleaned every time before changing the oil. The oil temperature of the press brake should be between 35℃ and 60℃ that is not exceed 70℃. Otherwise, it will cause deterioration and damage of the oil quality and accessories.

The filter of press brake should be replaced or thoroughly cleaned every time if the oil is changed. If the press brake has filter abnormalities such as unclean oil, the filter should be replaced. The air filter on the fuel tank should be inspected and cleaned every 3 months and replace every year.

After using the new press brake for one month, check whether the bending of each oil pipe is deformed. After two months of use, all fittings should be tightened.

What is the role of oil of press brake?

The oil of the press brake plays the role of transmission, wear resistance, system lubrication, anti-corrosion, rust prevention, and cooling in the hydraulic system. It belongs to the industrial hydraulic system. The hydraulic oil itself is constantly changing in use. However, it is difficult to completely solve the problem of hydraulic oil pollution.

Serious oil pollution will directly affect the performance of the press brake. It will cause frequent failures of the brake system and shorten the lifespan of press brake.

The main reason is the particles in the dust. As far as hydraulic components are concerned, these solid particles entering the components will increase the wear of the sliding parts. In addition, it may block the orifice, the orifice in the hydraulic component, or the spool stuck, causing the hydraulic system to malfunction.

The mixing of water and air reduces the lubrication of hydraulic oil, accelerating the oxidation of hydraulic oil and producing cavitation corrosion.

Learn more about press brake can know the reasons for oil leakage of press brake and how to deal with oil of press brake. LZK CNC Machine Tool(Anhui) Manufacturing Co., Ltd. can offer you better experience whether in terms of products or delivery.

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