分享facebook
分享twitter
分享linkedin

Important Guides You Should Know About Press Brake

分享facebook
分享twitter
分享linkedin
分享whatsapp

What is the press brake ?

Press brake machine is an important equipment for bending and forming workpieces in the sheet metal industry. Its function is to press steel plates into parts of various shapes according to process requirements.

The structure mainly includes a bracket, a working table and a clamping plate. The working table  places on the bracket. And it composes of a base and a pressing plate.

The base connects to the clamping plate through a hinge.And it composes of a housing, a coil and a cover plate. In the recess of the seat shell, the top of the recess is with a cover plate.

When in using, the wire energizes to the coil, and the gravitational force generates on the pressing plate after energizing, thereby realizing the clamping of the thin plate between the pressing plate and the base.

Due to the electromagnetic clamping, the pressing plate can make into a variety of workpiece requirements, and can process the workpiece with side walls. And at the meantime, the operation is very simple.

Press brake structure description

The press brake machine frame mainly composes of left and right columns, worktable, and beams. The left and right oil cylinders fix on the column. The slider connects with the piston of the oil cylinder and moves up and down along the guide rails fixed on the column.

The lower mold fixes on the worktable and the upper mold installs on the end of the slider. The hydraulic system provides power, and the electrical system gives instructions. Under the action of the oil cylinder, the slider drives the upper mold downwards and closes the lower mold to realize the bending of the sheet.

  • Slider part: Adopting the hydraulic transmission , and composing of a slider, an oil cylinder and a mechanical stopper fine-tuning structure. The left and right oil cylinders fixes on the frame, the piston (rod) drives the slider to move up and down through hydraulic pressure, and the numerical control system controls and adjusts the mechanical stop.
  • Worktable part: It controls by the button box, the motor drives the stopper to move back and forth, and the numerical control system controls the moving distance . The minimum reading is 0.01 mm (the front and rear positions have travel switch limits);
  • Synchronization system: The machine consists of a mechanical synchronization mechanism.    It composes of torsion shafts, swing arms, joint bearings, etc. It is with simple structure, stable and reliable performance, and high synchronization accuracy. The motor adjusts The mechanical stop, and the numerical control system controls the value;
  • Stopper mechanism: The motor drives the stopper, and the two screw rods drive to move synchronously through a chain operation. The numerical control system controls the size of the stopper.

Working principle of Press brake

Fix the upper and lower molds to the upper and lower worktables of the bending machine respectively, use the hydraulic transmission to drive the relative movement of the worktable, and combine the shapes of the upper and lower molds to realize the bending and forming of the plate

The basic principles of the bending sequence:

1) Bending from the inside to the outside.

2) Bending from small to large.

3) Fold the special shape first, then the general shape.

4) After forming the previous process , it will not affect or interfere with the subsequent process.

Function of Press brake

Bending machine is a kind of forging machinery, the main function is the metal processing industry. Products widely used in: light industry, aviation, shipbuilding, metallurgy, instrumentation, electrical appliances, stainless steel products, steel structure construction and decoration industries.

Bending machines are currently the first choice for sheet metal processing of sheets, especially large sheets. A variety of different molds are available for bending, stretching, rounding, punching and so on.

Classification of Press Brake

Manual bending machine

This type of bending machine has a relatively simple structure, and is laborious through manual operation, and is suitable for small-size processing.

Torsion shaft bending machine

All-steel welded structure, vibration eliminates stress, the machine has high strength and good rigidity. Hydraulic upper transmission, stable and reliable.

The mechanical stop and torsion shaft synchronized with high precision. The distance of the back gauge and the stroke of the upper slider adjust electrically, manual fine-tuning, and digital display.

Electro-hydraulic bending machine

The main oil cylinders on both sides adopt imported electro-hydraulic servo valve and grating ruler to form a closed-loop control synchronously. The feedback is accurate and the slider runs accurately, so that the bending accuracy and the repeatability of the slider are high.

Hybrid hydraulic bending machine

The computer controls the flow and pressure of the Y1 and Y2 cylinders through two sets of servo bidirectional pump systems. The oil in the upper cavity of the cylinder directly pumps into the lower cavity of the cylinder through the oil pump to realize the lifting of the upper mold. The oil pump is reversed to direct the oil in the lower cavity of the cylinder.

Drive into the upper cavity of the cylinder to achieve sheet bending. The left and right synchronization of the upper die of the machine tool is controlled separately by two sets of servo bidirectional pumps.

The press brake not only has high precision, energy saving, low noise, but also is more stable and reliable, and uses less oil, which is conducive to the manufacture of large stroke and super high speed bending machine.

Servo bending machine

Driven by a servo motor, the processing efficiency is higher, and the density is more precise through a visualized intelligent operating system. At the same time, the manpower requirements for operators are greatly reduced, and the safety issues for operators can also be improved.

Intelligent project management interface makes program programming easier. The bending system is combined with ERP and MAS production management systems to meet the needs of Industry 4.0.

The difference between the press brake

If there are two bending machines of the same type, the other aspects are the same, except that one uses servo CNC synchronization, and the other uses torsion axis synchronization, but the various aspects presented are also different, such as structure, Work efficiency and so on.

The difference between the servo CNC synchronization of the bending machine and the torsion axis synchronization is that the two sides of the bending slider have different structures to ensure synchronization. The torsion axis synchronous bending machine mainly relies on the forced synchronization of the mechanical balance axis, so the synchronization accuracy is low, there is no error feedback, and the bending slider has poor anti-deflection load capacity.

The electro-hydraulic servo CNC bending machine relies on the synchronization of the servo synchronous proportional valves on both sides, which not only has high synchronization accuracy, but also has real-time error feedback. The bending slider has a strong anti-deflection load capacity, and the bending effect obtained is bound to be better.

The difference between electro-hydraulic servo CNC bending machine and torsion axis synchronous bending machine is reflected in the work efficiency, which is closely related to the speed of the slider, the function of the CNC system, and the efficiency of the first test of the workpiece.

The opening height of the slider of the torsion axis synchronous bending machine is fixed, so every time when opened, it must move from a high point to a low point, and the opening height is too small, so the overall work efficiency is not high.

The opening height of the slider of the electro-hydraulic servo CNC synchronous bending machine can be digitally controlled by the grating ruler instead of returning to the high point every time, which effectively saves time and improves processing efficiency. From this point of view, the working efficiency of the electro-hydraulic servo synchronous bending machine is better.

In contrast, the numerical control system software used in the electro-hydraulic servo numerical control synchronous bending machine is highly integrated, so workers can program the required workpieces more intuitively and quickly, and the operation is simple.

Unlike the torsion-shaft synchronous bending machine, repeated calculations which required to program the program.

Number of axes of CNC Press brake

The axis number of CNC bending machine generally composes of Y axis, X axis, R axis, Z axis and V axis.

The Y axis represents the up and down movement of the cylinders on both sides
Y1 represents the electro-hydraulic synchronous closed-loop control axis of the left cylinder,
Y2 represents the electro-hydraulic synchronous closed-loop control axis of the right cylinder

The X axis represents backgauge movement back and forth (can be divided into X1 and X2)

The R axis represents the up and down movement of the back gauge (can be divided into R1 and R2)

The Z axis represents the left and right movement of the back gauge finger (can be divided into Z1 and Z2)

V axis represents the CNC compensation axis, which is generally mechanical

Customers can choose different number of shafts according to their own production needs. The standard number of axes of CNC bending machine is 3+1 axis (ie Y1+Y2+X+V), you can also choose 4+1 axis, 6+1 axis or 8+1 axis

How to choose a press brake suitable for yourself ?

In many processing and production industries, the application of bending machines is indispensable. The processing of materials through bending equipment can achieve higher accuracy standards and ensure the processing and production effects of materials.

However, many users do not know much about the equipment when choosing bending equipment, so there will be many questions during the selection of equipment. How should they choose suitable equipment to put into production when buying bending equipment?

During the processing and production of materials through the bending machine, it is necessary to first understand the processing requirements of the materials. For manufacturers with relatively large output, when selecting the bending equipment, the appropriate bending equipment should select according to the processing tonnage for application.

In this way, the processing efficiency of the bending equipment can ensure.And problems such as failures caused by the excessive processing volume exceeding the tolerance of the equipment can avoid.

In addition, there are many classification methods for bending equipment. If users do not know much about bending equipment, professionals can provide suitable purchase suggestions, so that the application of bending equipment can provide more convenient conditions for production work.

In addition, when purchasing a bending machine, pay attention to understanding different manufacturers. Nowadays, the demand for bending equipment is very large, and there are certain differences in the methods and methods adopted by different manufacturers when making bending equipment. The materials and production processes are different, so you need to pay attention to comparing the manufacturers when choosing bending equipment, and purchase equipment for production and processing through professional manufacturers.

The installation and use of the bending machine can make the bending operation of the material more convenient, and the material processing process can complete in a shorter time and operating procedure. In order to achieve such an application effect, attention should be paid to the selection of suitable bending equipment to put into production.

Below is several standard principles when you choose press brake machine

1) According to the thickness, length and material of the plate that produces the workpiece, choose a bending machine that can complete the processing task

2 ) According to your own requirements for bending accuracy, choose torsion axis synchronous bending machine or electro-hydraulic CNC bending machine

3 ) Choose the bending machine according to the degree of difficulty of bending the workpiece. For the simple one, you can choose the digital display bending machine, and for the complex one, you can choose the CNC bending machine.

4 ) Choose the bending machine according to your own budget, and choose the most suitable bending machine within your own tolerance

Daily maintenance and repair of bending machine

Before machine maintenance or cleaning, the upper mold should be aligned with the lower mold and then turned off until the work is completed. If you need to start or perform other operations, select the manual mode and ensure safety. The maintenance content is as follows:

Hydraulic oil circuit

1)Check the oil level of the oil tank every week. If the hydraulic system need to repair, it should also need to check. If the oil level is lower than the oil window, add hydraulic oil;

2)The hydraulic oil used in this machine is ISO HM46 or MOBIL DTE25;

3)The oil need to change after the new machine has been working for 2000 hours, and the oil should be changed after every 4000 to 6000 hours of work thereafter, and the oil tank should clean every time the oil is changed;

4)The oil temperature of the system should be between 35℃~60℃, and not exceed 70℃. If it is too high, it will cause deterioration and damage of the oil quality and accessories.

Filter

1)The filter should replace or thoroughly clean every time when change the oil ;

2)The press brake machine has related alarms or other filter abnormalities such as unclean oil, and should be replaced;

3)The air filter on the fuel tank need to inspect and clean every 3 months and replace every 1 year.

Hydraulic components

1)Clean hydraulic components (substrates, valves, motors, pumps, oil pipes, etc.) monthly to prevent dirt from entering the system, and cleaning agents cannot be used;

2)After using the new machine for one month, check whether there is any deformation in the bends of the oil pipes. If there is any abnormality, they should replace. After two months of use, all the fittings should be tightened. The system should shut down during this work. pressure.

Safety Operating Regulations for Bending Machine

1.Strictly abide by the safety operation regulations of machine tool workers, and wear labor protection equipment as required.

2.Before starting, carefully check whether the motor, switch, circuit and grounding are normal and firm, and check that the control parts and buttons of the equipment are stuck in the correct position.

3.Check the overlap and firmness of the upper and lower molds; check whether each positioning device meets the requirements of being processed.

4.When the upper slide plate and each positioning axis are not at the origin, run the return to origin program.

5.After starting the equipment , it runs idling for 1-2 minutes, and moves on the skateboard full stroke 2-3 times. If there is any abnormal sound or malfunction, stop immediately, remove the malfunction, and work after everything is normal.

6.When working, one person should be in uniform command, so that the operator and the feeding and suppressing personnel should cooperate closely to ensure that the cooperating personnel are in a safe position before issuing the bending signal.

7.The sheet must compact when bending, to prevent the sheet from lifting up and hurting people during bending.

8.The power supply need to cut off when adjusting the sheet metal die, and the operation should stop.

9.When changing the opening of the variable lower mold, no material need to allow to contact the lower mold.

10.When the machine is working, no one need to allow to stand behind the machine.

11.It is strictly forbidden to fold the sheet at one end alone.

12.If the workpiece or mold is found to be incorrect during operation, stop and correct it, and it is strictly prohibited to correct it by hand to prevent hand injury.

13.It is forbidden to fold over-thick iron plates or quenched steel plates, high-grade alloy steels, square steels, and sheets that exceed the performance of the sheet metal bending machine to avoid damage to the machine tool.

14.Frequently check the overlap of the upper and lower molds; whether the instructions of the pressure gauge meet the regulations.

15.In case of an abnormality, stop immediately, check the cause and eliminate it in time.

16.Before shutting down, place wooden blocks on the lower molds under the cylinders on both sides to lower the upper slide onto the wooden blocks.

17.Exit the control system program first, then cut off the power supply.

Common mechanical failures and maintenance of bending machine

When the slider is working, the downward direction is not vertical, and has abnormal noises .

This type of failure is due to the long time of use of the guide rail, abnormal lubrication of the guide rail, and increased clearance due to wear. It is necessary to check the wear degree of the guide rail pressure plate and readjust it to meet the required clearance. Depending on the degree of wear, determine whether to replace the guide rail pressure plate. If the strain is severe, it needs to replace.

The size of the back gauge is inconsistent at both ends

The error at both ends is small, within 2mm. Check to confirm that the X1/X2 mechanical transmission structure has no faults. The error can eliminate by adjusting the finger. If there is no fault in the mechanical transmission structure (such as bearings, ball screws, linear rails, transmission wheels, transmission belts, etc.), remove the fault. Re-adjust to within the tolerance of parallelism and re-install the synchronous transmission device.

The backgauge shaft has no action

The reason for the failure of the backgauge shaft transmission may be that the transmission shaft separates from the timing belt wheel, the key bar or the timing belt slips off. The stopper shaft driver and servo motor are faulty, and the upper computer control system is faulty. Such failures need to check and confirm the cause of the failure, repair or replace the failed components, and eliminate the failure.

The connection between the cylinder and the slider is loose

If the connection between the oil cylinder and the slider is loose, it may cause the bending angle to be inaccurate or the machine cannot find the reference point.

18 common faults and treatment methods of CNC bending machine

Excessive noise and vibration of the oil pump (too fast heating), damage to the oil pump

1. The oil pump suction line leaks or the oil tank liquid level is too low, causing the oil pump to suck

2. The oil temperature is too low, and the oil viscosity is too large, resulting in high oil absorption resistance

3. The oil filter at the suction port is blocked and the oil is dirty

4. Pump damage (injury during pump installation) caused by rough operation

5. Coupling installation problems, such as excessive axial tightening, the motor shaft and the oil pump shaft are not concentric

6. After installing the pump , it reverses for a long time or does not refuel

7. The outlet high-pressure oil filter is blocked or the flow rate is not up to the standard

8. The oil pump sucks (there is oil, but there is air at the oil pump suction port)

9. If it is a plunger pump, the height of the return line may be set too low

10. If it is a HOEBIGER oil pump, it may be deflated

11. The oil temperature is too high, causing the viscosity to decrease (within 60°C)

12. The hydraulic oil contains water, which can cause blockage and damage to the high-pressure filter element

The system has no pressure or can not build pressure

1. The steering of the oil pump is wrong or the oil pump has damage

2. Whether the pressure gauge has damage

3. Whether the pressure control valve has electrical signal or valve blockage

4. The pressure cartridge valve is blocked or stuck and cannot seal the oil

5. The filling valve is stuck (the slider does not slow down)

6. The compensation amplifier adjusts too small.

7. The pressure can only reach a certain value, use the method of directly supplying 24V to judge whether there is a problem with the valve oil pump

Pressure builds slowly (REXROTH hydraulic system)

1. The orifice at port X of the pressure valve may block.

2. The cartridge valve at the pressure valve may not move flexibly

3. Possible electrical problems: use the 24V voltage test directly to the solenoid pressure valve, or use something to test the solenoid pressure valve spool.

4. Is the high-pressure oil filter blocked?

There is an impact sound when fast down
  1. Impact sound caused by loose rail plate
  2. The position of the black film of the grating ruler is wrong
  3. The delay parameter setting value is too small before fast down
The slider does not move quickly

1. Is there any electrical signal or stuck in the quick valve

2. Whether the electromagnetic proportional directional valve has an electrical signal or whether the spool is moving or stuck (check the feedback voltage)

3. The mechanical part connected too tightly, such as the guide rail plate is too tight, the cylinder is too tight

4. The filling valve is closed and cannot be opened, so no oil can be sucked

5. Grating ruler problem

6. Whether the foot switch is in good condition, check the wiring

7. After the slow down valve is energized, close the filling valve, and the upper cavity cannot suck oil

Long pause time of slider speed conversion point
  1. The upper cavity of the oil cylinder sucks air, and the pressure builds up for a long time (the self-priming pipeline leaks)

2. The flow rate of the filling valve or self-priming pipeline is small, or the sliding speed is too fast, resulting in vacuum suction

3. The filling valve is not completely closing, and the pressure in the upper cavity slows down.

4. After energized the slow down valve , close the filling valve, and the upper cavity cannot suck oil

5. The wrong position of the proportional valve leads to different openings and out of sync

6. Decrease the fast down speed. Is the test paused?

7. The size of the fast down pressure has an effect on the closing of the filling valve, eliminating the fast down pressure

8. Adjustment of pressure parameters in the delay stage before work advance

9. The damping hole of the filling valve control line is too small, forming a pressure difference

10. CNC system parameters (delay before slow down)

11. CNC system parameters (lower gain parameters decrease)

The slider has no slow down movement

1. Whether the electromagnetic proportional directional valve has an electric signal or whether the spool is moving or stuck

2. The system cannot build pressure

3. The filling valve is stuck, or the filling valve sealing ring leaks

4. Whether the slow down valve has electrical signal or stuck

5. Back pressure is too high or slow down pressure is too low

When the slider moves slowly, it vibrates, swings, and makes noise

1. The pressure oil discharged from the cylinder contains air bubbles

2. The friction force of the slide rail is too large, whether there is lubricating oil

3. The gap between the fitting surface of the guide plate is large, or the top and bottom are uneven

4. The level of the rack and workbench is not adjusted properly

5. Blocking The balance valve

6. Check whether the quick-release valve is energized and opened

7. The numerical control system parameter (gain), or the work feed speed setting is too large

8. The back pressure valve is loose and the resistance on both sides is different

9. Whether the solenoid proportional valve coil is biased and whether the neutral position signal of the proportional valve is correct

10. Whether the signal of the proportional servo valve has disturb, the inspection method is the same as above

11. The piston rod is locked tightly by the oil cylinder sealing ring, and the resistance is large (change the PTFE hard sealing ring test)

12. The spherical washer on the grating ruler is not installed, the sliding seat does not move smoothly, and there is a problem with the grating ruler communication line

13. The pressure curve is wrong, and the pressure is not enough during work

14. The pressure sealing O-ring of the filling valve produces a small amount of leakage

The synchronization deviation is large when slow down
  1. Synchronous detection system failure (grating scale)
  2. Proportional direction reversing valve
  3. Leakage of quick lower valve
  4. Large gap in back pressure on both sides
  5. The oil temperature is too low
  6. The upper and lower chambers of the oil cylinder string oil
  7. CNC system parameters
The slider oscillates and jitters when need to maintain the pressure at the bottom dead center

1. There may be a problem with the grating ruler

2. The pressure oil discharged from the cylinder contains air bubbles

3. The balance valve is blocked

4. CNC system parameters (gain)

5. Back pressure valve problem, the resistance on both sides is different

6. Solenoid proportional valve problem: the neutral position may be wrong

7. The cylinder is tightened and the bolts are loose → the bottom dead center is jittering, the contour is not correct, the bending angle is not accurate, and there is a noise when bending

The slider has no return movement or slow return

1. Whether the electromagnetic proportional reversing valve is reversing and whether it is damaged

2. Whether the system has built up pressure, or the return pressure is too small

3. There may be one side of the filling valve stuck or not fully opened

4. After the slow down valve is energized, close the filling valve, and the return stroke cannot be fast

5. Numerical control system: the programming angle is too small to reach the bottom dead center of bending programming

6. Zero adjustment of CNC system parameters

7. The grating ruler is damaged or the wiring problem

8. Check whether the system pressure builds slowly

Vibration and jitter when the slider returns
  1. The return pressure is too high or too low
  2. System parameters or PLC and DM02 modules
  3. Whether the proportional valve coil is deflected
Slider slide down (top dead center)

1. Back pressure valve adjustment

2. Back pressure valve leakage or quick-down valve leakage

3. The upper and lower chambers of the oil cylinder string oil

4. Proportional valve offset

5. The supporting stability of the sealing ring is not enough, and the slide shows sliding down after deformation

6. Judging the cause of the sliding-after removing the proportional valve, observe whether the oil outlet in the lower cavity has oil

Large bending angle error

1. Check whether the compensation deflection of the compensation cylinder is large and the zero position cannot completely restored

2. Check whether the quick clamp is loose

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

4. Check whether the bow-shaped wrench is installed properly and whether the screw hole is deadlocked

5. Changes in the sheet itself (thickness, material, stress)

6. Is the grating ruler loose?

7. Positioning accuracy is not accurate: whether the zero offset value of the proportional valve is appropriate, and the positioning cannot reach the bottom dead center, making it impossible to return

Large bending straightness error

1. Check whether the compensation deflection of the compensation cylinder is appropriate

2. Check whether the quick clamp is loose

3. Check whether the horizontal and vertical mold bonding surface on the slider is deformed

4. Check whether the upper and lower molds are deformed

5. Changes in the sheet itself (thickness, material, stress)

6. Check whether the lower workbench (neutral plate) is deformed

The hydraulic pipeline leaks or the tubing bursts

1. Check whether the oil pipe installation meets the requirements (extended length, pipe diameter, wall thickness, ferrule, nut is too tight, too loose, bending radius, etc.)

2. Whether the tubing has impact or vibration

3. Check whether the pipeline interferes or collides with other

4. The pipeline is not fixed by pipe clamps

Matters needing attention during hydraulic system installation and maintenance:

1. The valves sealed with paint shall not be disassembled by themselves, let alone adjusted

2. The valve works normally after cleaning, it must be replaced with new oil and cleaned the oil tank immediately

3. The oil pump shall not be subjected to any knocks or impacts during installation, and the oil pump must be refueled before testing.

4. When installing each valve, only its valve body can be transported, and no solenoid valve should be touched

Analysis of common failures of backgauge
  1. Backgauge can’t move:

①Check whether the driver has alarm

②Check the limit switch of each axis

③Check the reliability of the connector

2. Driver alarm

3. The X and R axis are not running smoothly and there is jitter

4. Changes in positioning accuracy:

① Mechanical problems (whether there is looseness or impact)

②Electrical→One-way positioning

③Parameter adjustment

④Whether the tensioner wheel is loose, whether the screw connecting screw is loose

  • Overload alarm: Whether the ball screw can rotate easily, the steel ball may be damaged

Price of Press Brake

The bending machine is divided into WC67K series digital display bending machine and WE67K series CNC bending machine. The model of the bending machine is different, the configuration of the machine is different, the control system of the machine is different, and the price of the machine is also different.

WC67K series, the smallest standard model is 30T/1600, the price of the machine is about USD 4000 . If the customer has its own special requirements for the machine, the price of the machine will change relatively.

The standard control system of WC67K series includes E21, DA41S, CT8, TP10, etc. Customers can choose according to their needs

The WE67K series is a CNC bending machine with 3+1 axes as standard, and the starting price is USD 20,350. Customers can choose different machines according to their needs for the CNC system and the number of CNC axes. The most commonly used CNC systems are DA52S, DA53T, DA58T and DA66T. If customers have higher requirements for 3D display, they can choose DA69T.

 Press brake tooling

It is a tool used by the bending machine to form and process sheet materials. This tool composes of various parts, and different molds composes of different parts. It mainly realizes the processing of the shape of the article by changing the physical state of the formed material.

Common materials for bending machine molds are T8, T8A, T10, T10A, 42CrMo, Cr12MoV. 42CrMo and Cr12MoV are often used as molds for CNC bending machines. The material of the bending machine mold is the most important factor that affects the service life. If the material select well, the service life will relatively prolong without other variable factors. Another important factor affecting the service life is the heat treatment process during processing.

Bending molds including L-shaped, R-shaped, U-shaped, Z-shaped and other types of bending. The upper mold mainly has different angles such as 90°, 88°, 45°, 30°, 20°, 15°, etc. The lower mold has 4~18V double groove and single groove with different groove width, as well as R lower mold, acute angle lower mold, flattening mold, etc.

Six characteristics of bending machine mold

  1. The mold of the bending machine making of steel and undergoes special heat treatment. It has the characteristics of high hardness, not easy to wear, and high pressure. But every mold has its ultimate pressure: tons/meter. Therefore, when using the mold, the length of the mold should selecting, that is, how much pressure should increase per meter, and the pressure cannot exceed the pressure marked on the mold.

2. In order not to damage the mold, we stipulate that the upper and lower molds with a length greater than 300mm must be used for the origin. After the origin is corrected, upper and lower molds of the same height can be used. It is strictly prohibited to use separate small modules to perform the origin, and the origin must be based on the origin pressure in the AMADA machine.

3. When using molds, due to the different heights of various molds, only the same height mold can use in one machine, and molds of different heights cannot use.

4. When bending an acute angle or pressing a dead angle, you should select 30 degrees, first bend the acute angle, and then press the dead angle. When bending R angle, R upper mold and R lower mold should be selected.

5. When bending a long workpiece, do not use a parting die to reduce the indentation of the tool, but choose a single groove, because the outer angle R of the V-shaped groove of the single groove lower die is large and it is not easy to produce indentation.

6. When choosing the upper mold, we should know all the parameters of the mold, and then decide what kind of mold to use according to the shape of the product we need to form

For different workpiece materials and different structure, the tools used are different.And the resulting wear resistance, tensile strength, material hardness, tensile coefficient, plasticity, etc. are different.

When choosing a mold, a reasonable choice can make according to the pressure, structure, material, unfolded size of the workpiece, process requirements, and surface treatment of the machine tool.

Under normal circumstances, the width of the notch of the lower mold can be selected for iron plates, which is 7-9 times the material thickness, not less than 7 times. The notch of the stainless steel selection die is 6-8 times the material thickness, not less than 6 times.

For aluminum and copper, the notch of the lower mold can be 6-8 times the thickness of the material, not less than 6 times (should avoid surface cracks during bending).

The controller of the Press brake

The press brake machine has two kinds. One is NC bending machine, the other is CNC bending machine. Different kinds press brake machine has different controller.

For NC type , normally using controller is E21, E200P , DA41S, CT8, TP10. Below is the simple introduction of each kind controller

E21 controller

  • Back-gauge and block control
  • Control AC motor or inverter
  • Intelligent and unilateral positioning
  • Work-piece counting function
  • Holding/decompression time setting
  • 40 programs stored, 25 steps per program
  • One key back-up/restore of parameters
  • Unit for mm/inch
  • Language for Chinese/English

E200P controller

  • HD LCD Display
  • Multi-step programming
  • Bending Angle programming
  • X, Y axis servo motor control
  • Self-diagnose and real-time alarm
  • One key parameter backup

DA41S controller

  • Beam stop control.
  • Back-gauge control.
  • Angle programming.
  • Tool programming.
  • Retract function.
  • Up to 100 programs.
  • Servo control.
  • Up to 25 bends per program

CT8 controller

  • Large touchscreen, with vivid colors
  • On-line help and interactive warning pro-ups
  • Comfortable wireless data backup
  • And software updating using PC or Notebook
  • USB memory stick port for data transfer/backup
  • Large variety of languages available
  • Easy single bends with the EasyBend page
  • Intuitive and user-friendly interface

TP10 controller

  • RAM(Y axis) control
  • Backgauge(X axis) control
  • Angle programming
  • Tool programming
  • Retract function
  • Up to 220 programs
  • Servo control
  • Up to 24 bends per program

For CNC type, normally using controller is DA52S, DA53T, DA58T, DA66T. Or if you have high request, you can choose DA69T controller.

Sometimes , customer can choose ESA controller, such as S530 or S630 controller

Below is the simple introduction of each kind :

DA52S CNC controller

  • 7” widescreen color LCD
  • Crowning system control
  • Date backup/ restore via USB
  • Bending tool/material/product library
  • Automatic bending angle calculation
  • Up to 24 languages for selection
  • Up to 4 axes (Y1, Y2, and 2 auxiliary axes)

DA53T CNC controller

  • “Hot-Key” touch navigation
  • 10.1″ high resolution colour TFT
  • Up to 4 axes (Y1,Y2 + 2 aux. axes)
  • Crowning control
  • Tool / material / product library
  • Servo and frequency inverter control
  • Advanced Y-axis control algorithms for closed-loop as well as open-loop valves
  • TandemLink (option)
  • USB memory stick interfacing
  • Profile-T offline software

DA58T CNC controller

  • 2D Graphical touch screen programming
  • 15″ LCD TFT color display
  • Bend sequence determination
  • Developed length calculation
  • Bending tool/material/product library
  • Automatic bending angle calculation
  • Up to 4 axes (Y1,Y2,and 2 auxiliary axes)
  • Advanced Y-axis control algorithms for closed and open loop valves

DA66T CNC controller

  1. 2D graphical touch screen programming mode

2. 3D visualization in simulation and production

3. Crowning system control

4. 17″ high resolution color TFT

5. Date backup/ restore via USB

6. Bending tool/material/product library

7. Full Windows application suite

8. Open system architecture

DA69T CNC controller

1. 3D and 2D graphical touch screen programming mode

2. 3D visualization in simulation and production

3. Crowning system control

4. 17″ high resolution color TFT

5. Date backup/ restore via USB

6. Bending tool/material/product library

7.Sensor bending & correction interface

8. Profile-T3D offline software

S530 CNC controller

  1. 7” widescreen color LCD

2. Crowning system control

3. Selectable and programmable axes and auxiliary functions

4. Bending tool/material/product library

5. Automatic bending angle calculation

6. USB memory stick available on all products range

7. 2D graphic preview for part pieces

8. Full hardware and software compatibility among all products range

S630 CNC controller

  1. 10” graphic touch screen

2. Interactive 2d graohic editor

3. Automatic crowning system control

4. Automatic bending angle calculation

5. Bending tool/material/product library

6. Can Manage up to four axes in any combination

7. 2D graphic display for machine frame, work-piece and tools

bending01.png

Ivy Zhang

Ivy is our gold medal salesperson, she is in charge of the production and sales of bending machines for nearly 10 years, has rich professional knowledge. Many of our regular customers are willing to buy from here again and will refer Ivy to other friends who need machines.

RELATED ARTICLES

COMMENT

发表评论