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The CNC press brake mainly performs straight-line bending of the plate. Through the use of simple molds and process equipment, the metal sheet can be pressed into a certain geometric shape. CNC press brake is actually a multi-purpose fabricating machine. CNC press brake is suitable for several types of metal forming operations.

• What are the failures of CNC press brake?

• How to solve the large bending angle error of the CNC press brake?

• How to maintain CNC press brake?

What are the failures of CNC press brake?

Sometimes, there is the large or small bending angles during CNC press brake operates. It may be that the plate is uneven or the plate thickness has changed. It is also possible that the shaft in the CNC press brake is caused by deviation.

The oil pump of CNC press brake is too noisy or heats fast. Even, the oil pump is damaged. The oil pump suction line leaks or the oil tank liquid level is too low, causing to suck. The oil temperature is too low and the oil viscosity is too high, resulting in high oil absorption resistance. The oil filter at the suction port is clogged. Coupling installation is too tight to make the motor shaft and the oil pump shaft nonconcentric.

The CNC press brake system is pressure-free or cannot be built up. The oil pump rotates incorrectly. Whether the pressure gauge is damaged. Whether the pressure control valve has an electrical signal or the valve is blocked. The pressure cartridge valve is blocked or stuck that cannot seal the oil.

How to solve the large bending angle error of the CNC press brake?

With the continuous development of CNC press brake manufacturing technology, CNC press brake has the advantages of high positioning accuracy, convenience, zero-activity disturbance compensation, and good consistency of processed products.

Check whether the compensation deflection of the compensation cylinder is large so that the zero position cannot be completely restored.

Check whether the quick clamp and grating ruler is loose.

Check whether there is any change in the bottom dead center of each bending.

Check whether the bow-shaped plate is installed in a standard way and whether the screw hole is deadlocked.

The large bending angle error of CNC press brake can also be caused by changes in the sheet, such as thickness, material, and stress。

There is inaccurate positioning of CNC press brake that whether the zero offset value of the proportional valve is appropriate or not. It may be impossible to return because the positioning cannot reach the bottom dead center.

How to maintain CNC press brake?

After each shift, clean the work area of CNC press brake by removing all debris with a dry cloth. Clean the tools, bench, supports, slide guides and other accessories. Clean the backstops and guides of the backgauge. Do not use compressed air for cleaning.

The lubrication parts are sufficiently greased.

The motor and oil pump of CNC press brake operate normally without noise and overheating.

The safety protection device is safe and reliable.

Check whether the pressure of the hydraulic system is within the rated range.

The indicator is sensitive and reliable.

When repairing after the end of production, the slider needs to be lowered to the lowest point.

Check whether the fixed part of the mold is loose before work.

When working, the CNC press brake must not exceed the maximum pressure that is 160KN.

Learn more about CNC press brake can know the failures of CNC press brake and how to maintain CNC press brake. LZK CNC Machine Tool(Anhui) Manufacturing Co., Ltd. can help you keep CNC press brake in better condition.

The CNC press brake is composed of a bracket, a workbench and a clamping plate. The gravitational force is generated by energizing the coil to the pressure plate, completing the support for the thin plate between the pressure plate and the base. Because of the electromagnetic clamping method, CNC press brake can bend the plate according to the specific requirements.

• What is the structure of CNC press brake?

• What materials can be bent by CNC press brake?

• What affects the deflection of CNC press brake?

What is the structure of CNC press brake?

CNC press brake adopts hydraulic transmission and mechanical block. The cylinder is fixed on CNC press brake, while the piston rod is fixedly moved by hydraulic pressure. The mechanical block is used that the adjustment value is controlled by the environmental protection system.

Workbench of CNC press brake is designed by a button box. The retained intercepting material rack moves forward, whose distance is controlled by the control system. The minimum valve is about 0.01mm, which is limited by switch positioning of the front and rear position.

CNC press brake consists of a mechanical synchronization mechanism, which is composed of torsion shaft, swing arm, and joint motion. CNC press brake has simple structure, stable and reliable performance, and high synchronization accuracy. The mechanical stop is controlled by the motor to control the value of the system.

Material stopper mechanism used in CNC press brake is driven by a motor. The two screw rods move synchronously through chain operation.

What materials can be bent by CNC press brake?

The most commonly used carbon tool steels in CNC press brake are T8A and T10A. They are good at processing at low price. However, the harden ability and red hardness are poor. The heat treatment deformation is large with low bearing capacity.

As another common materials used in CNC press brake, low-alloy tool steel is based on carbon tool steel with an appropriate amount of alloying elements. It reduces the tendency of quenching deformation and cracking, improving the harden ability of steel. It has better wear resistance.

High carbon and high chromium tool steel

High carbon and high chromium tool steels are another important material used in CNC press brake. They have good harden ability and high wear resistance. The heat treatment deformation is very small. CNC press brake die steel is second only to high-speed steel in carrying capacity. However, the segregation of carbides is serious, which has to upset and forge again to reduce the unevenness of carbides.

What affects the deflection of CNC press brake?

Two working cylinders of CNC press brake are pressurized at both ends of the slider. The resultant force of the deformation of the workpiece is in the middle, so the worktable of the sliding block of CNC press brake will be flexed and deformed together with the upper and lower molds.

The sheet material will receive uneven force at various points along the length of the die edge, which directly affects the accuracy and straightness of the bent workpiece. To make up for this shortcoming of CNC press brake, a deflection compensation device can be installed.

Preset a deformation amount opposite to the force deformation direction between the press brake slider and the upper die. The amount of deformation is the same as the relative amount of deformation during actual work. The relative deformation of the slider and the worktable is compensated so that the pressure distribution between the dies is more uniform. CNC press brake improves the quality of sheet metal bending.

Learn more something about CNC press brake can know the structure of CNC press brake and the materials used in CNC press brake. LZK CNC Machine Tool(Anhui) Manufacturing Co., Ltd. has a long history in manufacturing high quality CNC machines. Contact us soon!

Shearing machines are to cut all kinds of metal plates. In the manufacturing system of plate flexibility, the shearing machine is often indispensable. Shearing machine belongs to the type of straight-line cutting, which is mainly used to cut the straight edge of various sizes of metal plates.

• What are the failures of shearing machine?

• How to troubleshoot the errors of shearing machine?

• How to maintain shearing machine?

What are the failures of shearing machine?

The oil pump of shearing machine is too noisy. The oil suction resistance is large. Check the oil suction pipe and clear the blockage. If the oil volume of shearing machine is too low, replace the hydraulic oil with a higher oil volume. If the oil viscosity of shearing machine is too high, replace the working oil. If the clearance between the end face of the pump shaft and the motor shaft is small, adjust the clearance at the well end.

Oil temperature used in shearing machine is too high. There is excessive leakage inside the oil pump. The oil return pipe of the oil pump is blocked or not cleared. The oil viscosity is too high to repair the pipe. If the oil pump is damaged, replace it.

The air release valve of shearing machine leaks. Disassemble and check the tight seal of the conical surface of the relief valve.

The hole of shearing machine is congested. Clean, grind, debug, inspect, repair or replace the overflow valve.

How to troubleshoot the errors of shearing machine?

Shearing machine operator should master the operation of the shear hydraulic system. Whether the hydraulic system is working normally. Whether the hydraulic pump is abnormal. Check the cleanliness of the hydraulic oil used in shearing machine. Check the cleaning and replacement of the filter element. Whether the hydraulic components of shearing machine have been adjusted before failing. Whether the sealing component of shearing machine has been replaced. They also master the abnormal phenomena occurred in the hydraulic system of the shearing machine before and after the failure. They should be equipped with some knowledge about how to eliminate the failures causing shearing machine fail.

Check the actual working conditions of the shearing machine, together with system pressure, speed, oil, leakage, vibration and other parts.

Pay attention to the sound of shearing machine, such as attack noise, pump noise, and other abnormal noises. Judge whether the shearing machine is working normally.

Check the temperature of shearing machine to determine whether the working condition of the moving parts is normal.

How to maintain shearing machine?

Operate shearing machine strictly in accordance with the operating procedures. It is strictly forbidden to operate the shearing machine by non-designated personnel.

Add lubricating oil according to the requirements of the lubrication chart every time before starting the shearing machine. The oil should be clean and free of precipitation.

The shearing machine must be kept clean frequently. The unpainted part should be painted by anti-rust grease.

The lubricating oil in the motor bearing should be replaced and refilled regularly. The electrical part should be regularly checked for normal, safe and reliable operation.

Regularly check V-belts, handles, knobs, and buttons to avoid severely wearing. The spare parts should be reported for replenishment.

Regularly check and repair switches, insurances, and handles to ensure reliability.

Lubricate and scrub the shearing machine 10 minutes before leaving get off work every day.

Learn more about shearing machine can know the failures of shearing machine and the maintenance of shearing machine. LZK CNC Machine Tool(Anhui) Manufacturing Co., Ltd. is equipped with many professors in manufacturing and offering solutions.

Press brakes represent a wealth of experience and pioneering innovation. Press brakes can combine with other machines for die and panel bending technologies. There is a wide range of options available for each bending technology to suit specific application. Use press brake to produce simple and complex parts in any format precisely and cost-effectively.

• What is the structure of press brake?

• What are the structural features of press brake?

• What should you know about the supporting wheel frame of press brake?

What is the structure of press brake?

The structure of press brake mainly includes a bracket, a working table and a clamping plate. The working table composed of a base and a pressing plate is placed on the bracket. The base containing a seat shell, a coil and a cover plate is connected with a hinge and a clamping plate. The coil is placed in the recess of the seat shell. The top of the recess is covered with a cover plate.

Slider part of press brake uses hydraulic transmission. It is composed of sliding block, oil cylinder and mechanical fine-tuning stopper. The left and right oil cylinders are fixed on the frame. The piston drives the slider to move up and down by hydraulic pressure.

The workbench part of press brake is operated by the button box. The motor drives the stopper to move back and forth.

The synchronization system of press brake is composed of a torsion shaft, swing arm, joint bearing and other mechanical synchronization mechanisms. It has a simple structure, stable and reliable performance, high synchronization accuracy. The mechanical stop is adjusted by the motor.

The gauge mechanism of press brake is driven by a motor. The two screw rods are driven to move synchronously through the chain operation.

What are the structural features of press brake?

1. Press brake adopts all-steel and single-welded structure.

2. Press brake uses hydraulic transmission. The end cylinder of the press brake is selected on the upper, which directly drives the mobile work.

3. Press brake has multiple synchronization mechanisms adopting torsion shaft synchronization.

4. Press brake uses mechanical block structure, which is stable and reliable.

5. Press brake uses manual fine-tuning, clicking to display.

6. Oblique three-dimensional deflection compensation mechanism of press brake ensures the reduction of bending accuracy.

What should you know about the supporting wheel frame of press brake?

The press brake needs to change molds according to different products. The supporting wheel frame of press brake needs to adjust the height of the supporting material. There are problems of troublesome operation and low efficiency in the processing. By optimizing the design of the supporting wheel frame of the press brake, the goal of adjusting the height and length by rotating the lead screw is realized. It is an indispensable part of the press brake, which mainly plays the role of feeding and pushing materials.

The support roller frame is composed of 45 round steel rollers, which are set on the top and are higher than the support beams on both sides. The sheet material pushing is light and fast.

The bracket mainly plays the role of supporting the placement of the plates. It is considered to be able to place more than 10 plates at the same time and have sufficient strength. The rectangular tube frame structure can reduce the deformation of long-term high-load operations.

Traveling wheel is connected with the ground guide rails by rollers. The guide rails are set to ensure that the support roller frame walks along a straight line that is parallel to the press brake.

Learn more about press brake can know the structure of press brake and the structural features of press brake. LZK CNC Machine Tool(Anhui) Manufacturing Co., Ltd. is a powerful manufacturer in China. it is wise of you to cooperate with us.

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A press brake is a special type of machine press that bends sheet metal into shape. A good example of the type of work a press brake can do is the back-plate of a computer case. Other examples include brackets, frame pieces and electronic enclosures. Some press brakes have CNC controls and can form parts with accuracy to a fraction of a ...

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