Problem solution and related knowledge of CNC press brake bending machine

Reading Time: 5 minutes

As the name suggests, a CNC press brake bending machine is a device that bends materials. So, how much do you know about CNC press brake bending machines? Today, Xiaobian will introduce the CNC press brake bending machine widely used in the production industry. If there is a problem with the CNC press brake bending machine, how should we solve it? The following is an introduction to “Introduction to Problem Solving Methods and Related Knowledge of CNC Press Brakes”.

Fault and maintenance methods of CNC press brake bending machine

1. Common faults of CNC press brake bending machine

  1. The damping hole is congested, and the system has no main pressure relief valve failure. The debugging is not suitable, the spring climbs and breaks, the tight sealing of the valve core cone surface is very poor or the valve core is stuck. Clean, grind, adjust, inspect, repair or modify overflow valves. The solenoid reversing valve is faulty and the valve core is stuck. Clean, grind or modify the spool valve.
  2. The slider does not move but can descend by its own weight. The axial piston pump cannot provide pressure oil: the oil stick is short of oil; check and repair the start button, and the motor fails to start. AC contactor and thermal relay and motor; the plunger pump itself shows failure, dismantle or change the plunger pump.
  3. The main oil circuit relief valve is faulty. It may be that the damping hole is congested and the debugging is not suitable, the spring is folded or the valve core is rusted and stuck. Need to debug, check and repair or change the relief valve.
  4. The slider is unfairly tightened by tightening the air release valve handwheel to release air, and there is air in the equalization cylinder. After filling with oil and removing the air, unscrew the valve.
  5. If there is leakage in the air release valve, disassemble and inspect the tight sealing of the conical surface of the air release valve, and repair or modify the air release valve.
  6. There is internal leakage in the check valve. Disassemble and inspect the tight seal of the check valve cone surface, and the sealing surface of the grinding cone surface is preferably in line contact, or the check valve should be modified.
  7. The tightening screws of the oblique iron on the head of the piston rod of the equalizing cylinder of the bending machine are loose, check and combine the oblique iron on the head of the piston rod with the tight screws.

2. Maintenance method of CNC press brake bending machine

  1. The slider cannot go down, and the electromagnetic reversing valve cannot be reversed. Repair or modify the case fixing screws loose. Check and tighten the check circuit; the valve core of the reversing valve is stuck. Clean, grind or modify the spool valve.
  2. Check, repair and clean the one-way throttle valve core stuck or closed.
  3. The slider can only be lowered to repair or change, and it is easy to tighten the fixing screws of the housing. The solenoid valve cannot be reversed. The valve core is stuck. Clean and grind or modify spool valve; no action or loose housing screws. search circuit.
  4. The valve core of the hydraulic control check valve is stuck. Check and repair, the hydraulic control check valve cannot be opened. Clean or modify.
  5. It is possible that the spring is loosely adjusted. Tighten the handwheel of the pressure repeater clockwise, the pressure repeater is faulty. Tighten the spring.
  6. The tightly sealed closed ring of the piston cylinder has serious wear and tear, and it is easy to change the tightly sealed closed ring.

Four kinds of reference point methods of CNC press brake bending machine

The way that the CNC system of the bending machine controls the CNC press brake bending machine to return to the reference point can generally be divided into the following types:

1. When returning to the origin manually, the back-to-origin axis first moves to the origin at the fast traverse speed set by the parameters; when the deceleration block presses the origin deceleration switch, the back-to-origin axis decelerates to the slower reference point positioning speed set by the system parameters. Continue to move forward; when the deceleration switch is released, the CNC press brake bending machine system starts to detect the grid point or zero pulse of the encoder;

When the system detects a grid point or zero pulse, the motor stops rotating immediately, and the current position is the zero point of the machine tool.

2. The back-to-origin axis first moves to the origin at the fast moving speed set by the parameters; when the deceleration block presses the origin deceleration switch, the back-to-zero axis decelerates to the slower reference point positioning speed set by the system parameters, and the axis is in the opposite direction. Move; when the deceleration switch is released, the numerical control system starts to detect the grid point or zero pulse of the encoder;

When the system detects a grid point or zero pulse, the motor stops rotating immediately, and the current position is the zero point of the CNC press brake bending machine.

3. The homing axis first moves to the origin at the fast moving speed set by the parameters; when the deceleration block presses the origin deceleration switch, the homing axis decelerates to the slower reference point positioning speed set by the system parameters, and the axis is in the opposite direction Move; when the deceleration switch is released, the zero-return axis reverses again; when the deceleration switch is pressed again, the zero-return axis runs at the speed of finding the zero pulse, and the CNC system of the CNC press brake bending machine starts to detect the grid point or zero of the encoder. pulse.

When the system detects a grid point or zero pulse, the motor stops rotating immediately, and the current position is the zero point of the CNC machine tool of the CNC press brake bending machine.

4. After the back-to-origin axis receives the zero-return signal, it moves to a fixed direction at a slow speed at the current position, and the numerical control system starts to detect the grid point or zero pulse of the encoder; when the system detects a grid point or zero pulse After the zero pulse, the motor stops rotating immediately, and the current position is the zero point of the machine tool.

When the CNC press brake bending machine system controls the CNC press brake bending machine to return to the reference point and fails, first check whether the deceleration block is loose and whether the deceleration switch is fixed firmly or damaged. Check the length of the deceleration block and whether the installation position is reasonable; check the pulse encoder or grating ruler, etc.

The above introduction to “Faults and Maintenance Methods of CNC Press Brakes” and “Four Reference Points of CNC Press Brakes”, I hope you can understand the “Introduction to Problem Solving Methods and Related Knowledge of CNC Press Brakes” with to help.

Problem solution and related knowledge of CNC press brake bending machine
Problem solution and related knowledge of CNC press brake bending machine 2
Problem solution and related knowledge of CNC press brake bending machine 3
Problem solution and related knowledge of CNC press brake bending machine 4
Problem solution and related knowledge of CNC press brake bending machine 5

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