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  • What if the workpiece interferes with the press brake machine?

Press Brake FAQs

  • How to adjust the size of the press brake?
  • How to adjust the angle of the press brake?
  • How to compensate deflection of press brake machine?
  • The press brake can’t go up and down. What’s the matter?
  • How to bend an arc with a press brake?
  • Comparison between grating ruler and magnetic grating ruler of press brake
  • Up and down moving type of press brake, which is better?
  • What is the problem that the downward speed of the hydraulic press brake suddenly slows down during operation?
  • The bending angle of the press brake is different
  • How long to change the hydraulic oil of the press brake?
  • List of hazard sources and risk assessment form of press brake
  • List of minimum bending radius of common metal materials
  • How many press brake controllers are there? How to choose?
  • How to choose between open loop and closed loop press brake?
  • What is a three cylinder press brake?
  • What is a four cylinder press brake?
  • What is the difference between three cylinder press brake and two cylinder press brake?
  • Why can’t the press brake machine return?
  • What are the functions of three motors of ordinary press brake machine?
  • What are the functions of the three relief valves on the press brake?
  • What if the press brake doesn’t go up when it comes down?
  • The press brake is normal up and down, but it is not pressurized!
  • Where does the number of backgauge axis (X,Y,Z,R) of press brake refer to?
  • How does the X-axis of press brake return to the origin?
  • Why the Y-axis of press brake does not return?
  • How many times to bend a large arc and how to calculate the bending angle?
  • How to adjust the stroke of the press brake?
  • The pressure at both ends of the hydraulic press brake is not the same. How to adjust it?
  • The cylinder stroke on both sides of the press brake is different. How to adjust it?
  • How to program CNC press brake?
  • How to adjust the downward speed of the press brake?
  • How to calculate the size and angle of sheet metal bending?
  • How to calculate the nominal pressure required by the press brake according to the thickness and length of the steel plate to be bent?
  • How to calculate the unfolded dimension of sheet metal bending?
  • How is the bending coefficient of sheet metal calculated
  • What is the relationship between bending factor and plate thickness, bending angle and bending radius?
  • How to calculate the bending coefficient of sheet stainless steel?
  • How to calculate the tolerance of sheet bending machine?
  • What is the reason why the middle of the folded workpiece is bent?
  • Why can’t the hydraulic press brake go up and down?
  • How can the angle of the press brake be adjusted if it cannot be pressed at right angles
  • How to fold different angles with a press brake?
  • How to disassemble the oil cylinder of the press brake?
  • The press brake cannot be started
  • How to eliminate the bending indentation of stainless steel press brake die
  • How to adjust the downward speed of the press brake machine?
  • What’s wrong with the unstable pressure of the press brake?
  • Why can’t the press brake machine rise?
  • What about the deformation of the press brake ram?
  • How does press brake bend a cone?
  • How to use press brake to fold a large circular arc?
  • What’s the matter with the slow down speed of the press brake?
  • What if the downward speed of the press brake is fast?
  • The downward speed of the hydraulic press brake becomes slow and the upward jitter!
  • What happened to the hydraulic oil leakage on one side of the press brake?
  • The two cylinders of the press brake are not synchronized
  • What if the workpiece interferes with the press brake machine?
  • Can the press brake machine fold the U-groove?
  • Environmental requirements of CNC press brake
  • What happened to the abnormal noise of the press brake oil pump motor?
  • A simple method for electric heating of hydraulic oil of press brake
  • What’s wrong that the press brake punch can’t lower to the bottom?
  • How to select the size of the lower V groove for sheet metal bending according to the plate thickness
  • How to break the lock of the press brake?
  • How to determine the bending radius of sheet metal?
  • How to solve the problem that the press brake pressurizes too slowly? How to pressurize quickly
  • What hydraulic oil does the press brake use?
  • How many years to change the press brake hydraulic oil?
  • What determines the sheet metal bend radius?
  • Stress relief of stainless steel 304 after bending
  • What are the corresponding protective devices of the press brake?
  • How to adjust CNC press brake?
  • What is the reason for the noise of press brake?
  • How to solve the oil leakage of oil cylinder of the press brake?
  • How to repair the scratches on mirror stainless steel?
  • How much can the bending tolerance of the press brake be controlled?
  • What is the minimum bending size of the press brake?
  • Where is the pressure relief after pressurization of the press brake adjusted?
  • How to choose electro-hydraulic servo synchronous cnc press brake?
  • How to fold a semicircle with a pres brake?
  • How is the inner radius of sheet metal bending determined?
  • How to calculate the bending radius of sheet metal?
  • How to set bending radius and bending deduction in SolidWorks?
  • The most complete sheet metal bending allowance table
  • How to set the K factor, bending deduction, bending allowance and bending calculation in SolidWorks? What’s their relationship?
  • How does the press brake accurately control the bending angle?
  • What is the reason why the blade of press brake can’t rise?
  • Which axes do the 3 + 1 axis and 4 + 1 axis of the press brake refer to respectively?
  • What does the Y value limit of press brake mean?
  • Function of time relay in press brake circuit
  • What is the difference between electro-hydraulic servo press brake and torque synchronous press brake?
  • What hydraulic pump is generally used for press brake?
  • How do you know what material the lower die of the press brake is?
  • When the press brake steps up, it cannot stop and automatically slides down
  • How to understand the N + 1 axis of press brake machine?
  • How to change the tool of press brake?
  • What material is generally used for press brake dies? What is the hardness?
  • Do you need to grind the top punch of press brake?
  • How to level the tools of press brake?
  • What is the problem that the press brake tools are not in a straight line?
  • How to repair the crack of stainless steel bending tool?
  • How to select the material of press brake die?
  • What is the problem of automatic tool drop of ordinary press brake?
  • How does the press brake go down slowly?
  • What is the difference between the acute punch and gooseneck punch of press brake?
  • The press brake tool has dents. How to repair it?
  • What is the quenching hardness of general press brake die?
  • Calculation formula of press brake die price
  • What is the general angle of the press brake dies?
  • How to select arc radius punch and die of press brake?
  • How to calculate the bending angle of the press brake?
  • What are the factors that determine the service life of press brake die?
  • How to select the top punch of the press brake?
  • Golden section size of press brake dies
  • Anti rust treatment of press brake dies
  • Comparison chart of press brake die combination
  • The press down pressure of the press brake machine is not enough, but the rising pressure is normal

Press Brake Hub

  • What is CNC press brake and it’s working principle
  • Brief introduction of synchronous system of CNC press brake
  • Workpiece bending diagram of press brake
  • Installation of CNC press brake
  • Operation of CNC press brake
  • Adjustment of bending parameters of CNC press brake
  • Bending accuracy of CNC press brake
  • Safety protection of CNC press brake
  • Press brake punch and die installation
  • Adjustment of CNC press brake
  • Hydraulic oil of CNC press brake
  • Lubrication of CNC press brake
  • Repair and maintenance of CNC press brake
  • Main structure of CNC press brake
  • Explanation of CNC press brake axis
  • Operating environment of press brake
  • Press brake punch and die selection
  • Adjustment of press brake’s mechanical part
  • Causes and solutions of common faults of press brake

Guillotine Shear Hub

  • Purpose and characteristics of the guillotine shear
  • Main structure of the guillotine shear
  • Hydraulic system of the guillotine shear
  • Lifting and installation of the guillotine shear
  • Lubrication of the guillotine shear
  • Operation and adjustment of the guillotine shear
  • Safety and maintenance of the guillotine shear
  • Guillotine Shear: Common Faults and Troubleshooting
  • Accuracy check of the guillotine shear
  • Home
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  • Press Brake
  • Press Brake FAQs
  • What if the workpiece interferes with the press brake machine?

What if the workpiece interferes with the press brake machine?

When the standard punch cannot avoid the position, the gooseneck punch should be selected to avoid the position, as shown in figure (1).

What if the workpiece interferes with the press brake machine

However, sometimes the gooseneck punch cannot avoid the position, so it is necessary to increase the process: first press a seal on the bending line – as shown in figure (2)

What if the workpiece interferes with the press brake machine

For better bending, this bending can be folded to a certain angle to avoid blade collision, and then press the edge to 90 degrees, as shown in figure (3)

What if the workpiece interferes with the press brake machine

In general, the embossing process can be applied to bending which can not be completed at one time.

In this way, during the second bending, the bending line can be better formed according to the original bending, otherwise it is easy to cause bending deviation or poor control of bending angle due to the second bending.

Therefore, such problems should also be considered in the design process.

If the requirements are met, try to avoid using such process, because it has no good effect of direct bending, and there may be deviation in size and angle.

The press brake can also be used to press the edge of the workpiece. First bend the workpiece to 30 degrees, and then press the workpiece with a flat punch. However, generally, the hemming edge completed by ordinary punch shall not be pressed by the press brake as far as possible, because the effect of hemming edge by the punch press is relatively better.

During the bending process, in addition to the interference between the workpiece and the bending knife, when the size of the workpiece is relatively large, it may also interfere with the press brake during bending.

When we arrange the process, we often have to consider whether it’s easy to bend and whether it can be bent.

Because bending is a very important process, the good operation of bending directly affects the guarantee of bending quality, and many quality problems are caused by the poor control of bending size.

Therefore, special attention should be paid to the bending problem in the design process, which is related to the stability of product quality during mass production.

For different plate thickness, its bending size is limited and can not be too small. Generally, it is related to the lower die.

The general principle is: select the V opening with 6 times the plate thickness for the lower die, so that the bending coefficient is most consistent with the empirical value.

The general die slots are classified according to the outer width of the slot, as shown in figure (4), which are #6 and #10 slots respectively.

What if the workpiece interferes with the press brake machine

However, when a small enough groove is selected for bending, indentation is easy to occur. Generally, the indentation below #6 groove is obvious.

Therefore, when the workpiece surface is not treated, and the bending edge is relatively small, there is obvious indentation.

On the one hand, it affects the appearance, and on the other hand, it is easy to rust, so we should pay attention to it in design.

As can be seen from the figure above, for slot #10, the distance from the bending line to the positioning edge must be greater than 5.0mm before bending.

It can be seen that generally, #4 slot is the smallest tool slot, and the distance from the bending line to the positioning edge should be greater than 2.0mm.

Generally, #4 slot is mostly used for thin plate (less than 1.2mm).

Because if the thick plate is bent, the pressure required is relatively large and the groove is small, it is easy to burst the knife groove.

Therefore, for bending 1.0mm plate, it is better if the bending edge is greater than 3.5mm (there will be indentation);

For bending 1.5mm plate, the bending edge shall be greater than 5.0mm.

The bending edge of 3.0mm plate shall be greater than 12mm.

Such problems can be considered in the design process.

Various problems will be encountered in the actual bending process.

In many cases, the impact of bending on other processes should be considered and specific problems should be analyzed and the process should be arranged appropriately.

At the same time, under some special needs, the supplier will also manufacture special bending tools.

However, if the shape of the tools is more strange or the curvature is greater, it will inevitably affect the rigidity of the cutter and reduce the service life of the blade.

Related:

  • What is the relationship between bending factor and plate thickness, bending angle and bending…
  • How to bend an arc with a press brake?
  • How to determine the bending radius of sheet metal?
  • How to select the top punch of the press brake?
  • How to adjust CNC press brake?
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Updated on May 31, 2022
The two cylinders of the press brake are not synchronizedCan the press brake machine fold the U-groove?

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