กดเบรก

17 ปัญหาและแนวทางแก้ไขทั่วไปที่คุณควรรู้สำหรับเครื่องดัด

กดเบรก

A bending machine is a forming machine tool (DIN 8586). Its purpose is to assemble a bend on a workpiece. A bend is manufactured by using a bending tool during a linear or rotating move.

  • Why can’t the main motor of the bending machine start?
  1. The starting circuit of the main motor is faulty, such as: the emergency stop button is not released, the cable connection is loose, the 24V control power supply, etc.
  2. The related components of the main motor starting part are faulty, such as: thermal relay, circuit breaker, AC contactor and other overload protection or have been damaged;
  3. Power problem.

สารละลาย:

  1. Check whether the main motor starting circuit has an emergency stop but is not released, the wiring is loose, and the 24V control power supply;
  2. Check whether the components of the starting circuit of the main motor have overload protection. If there are reasons to be analyzed, check whether the components are damaged;
  3. Check whether the three-phase power supply is normal.
  1. The slider guide is adjusted too tightly;
  2. The back gauge shaft is not in place;
  3. The slider is no longer at the top dead center position;
  4. Signals such as foot switch do not enter the module;
  5. The proportional servo valve is malfunctioning.

สารละลาย:

  1. Check whether the slide rail is suitable;
  2. Check whether there is a cursor at the actual position of X on the system, or check whether the programmed value of the back gauge axis is consistent with the actual value in the manual interface;
  3. The Y axis status on the system should be “1”, if it is “6”, check the actual coordinates of the Y axis, the value should be less than the difference between the Y axis and the return;
  4. According to the electrical schematic diagram, check whether the input signal such as the foot switch is normal;
  5. Check whether the proportional servo valve feedback is normal.
  • The reason why the slider of the bending machine cannot be bent or the bending speed is very slow?
  1. The slider has not reached the speed transition point;
  2. The parameter setting of the Y-axis bending part of the system is not good;
  3. Insufficient pressure, such as: programming operation, machine parameter setting, hydraulic pressure, etc.

สารละลาย:

  1. Check whether the status of the Y-axis changes from “2” to “3”, the actual value of the Y-axis should be greater than the value of the speed conversion point, if not, it is necessary to adjust some parameters of the fast forward;
  2. Readjust the parameters of the Y-axis bending part;
  3. Check whether it is due to programming operation, parameter setting, or hydraulic pressure; you can use pressure gauges, multimeters, etc. to detect the signals of the main pressure and proportional pressure valve first, and then check whether the proportional pressure valve and main pressure reducing valve are damaged. stuck, then check the filter element and oil, and finally check the oil pump and its coupling.
  • The reason why the slider sometimes cannot return when bending?
  1. No-load can not return, it may be a parameter problem or hydraulic failure;
  2. The return stroke cannot be performed during processing, and the angle of the workpiece does not reach the set value;
  3. Check whether it is due to programming operation, parameter setting, or hydraulic pressure; you can use pressure gauges, multimeters, etc. to detect the signals of the main pressure and proportional pressure valve first, and then check whether the proportional pressure valve and main pressure reducing valve are damaged. stuck, then check the filter element and oil, and finally check the oil pump and its coupling.

สารละลาย:

  1. Debug some parameters of Y-axis bending. The bending parameters should be adjusted according to the actual situation. If part of the gain is too small, the slider will not be bent or not folded in place. If it is too large, the slider will shake. The parameters should be adjusted so that the slider does not shake during action. , the gain should be as large as possible; or the left and right valve offset settings in the diagnostic program are not good, the Y axis cannot be in place if it is too small, and the Y axis cannot be unloaded if it is too large; if it is a hydraulic failure, it is necessary to check the main pressure and check the PV valve S5 Whether it is always in the power-on position;
  2. Maybe the parameter gain of the Y-axis bending part is set too small, and it can be increased appropriately; or the pressure is not enough, analyze the reason for the insufficient pressure, whether it is the programming reason or the signal and hydraulic part; Material, workpiece length, bending method, etc. The hydraulic reasons mainly include whether the oil pump leaks, whether the proportional pressure valve is polluted or damaged, whether the filter element is blocked, whether the oil is polluted, etc.;
  3. Mainly for programming and operation reasons, check the programmed and machined workpiece.
  • The reason why the slider of the bending machine does not work well?
  1. The slider guide rail is not tight enough;
  2. The slider lock nut is loose;
  3. Machine parameters need to be adjusted;
  4. The gain and zero position on the proportional servo valve amplifier need to be adjusted;
  5. Backpressure valve pressure setting is incorrect or unbalanced on both sides. If the back pressure setting is too small, the slider will slide down slowly, and it will shake when working; if the back pressure is unbalanced on both sides, the slider will twist when running.

สารละลาย:

  1. Readjust the rail clearance;
  2. Re-tighten, if the lock nut is too loose with the screw, it needs to be replaced;
  3. If there is a reference curve, it should be adjusted according to the reference curve;
  4. Only BOSCH and REXROTH valves are adjustable, but caution is required;
  5. Use the pressure gauge to adjust the pressure of the back pressure valve and make the two sides consistent.
  • Sometimes the main motor of the bending machine stops automatically, why is the thermal relay and circuit breaker protected?
  1. The proportional pressure valve and the main pressure reducing valve are stuck, and the machine tool is always pressurized;
  2. The filter element is blocked, the oil is not smooth, and the pump pressure is always high;
  3. The oil has been used for too long and has been contaminated;
  4. Poor quality oil;
  5. Circuit breaker, thermal relay problem, can not operate until rated current;
  6. The system controls the faulty pressure output part and sends out an error signal to make the proportional pressure valve work all the time.

สารละลาย:

  1. Clean proportional pressure valve and main pressure reducing valve;
  2. Replace the filter element and check the degree of oil contamination;
  3. Change the oil filter immediately;
  4. Change the recommended oil;
  5. The circuit breaker was replaced, and the sales were successful;
  6. Check system output.
  • Why are any of the valves in the press brake stuck?
  1. The oil has been used for too long and has become contaminated;
  2. The oil quality is too poor;
  3. Whether the rubber skin of the fuel tank inlet is aged.

สารละลาย:

  1. It is recommended that customers change the oil on time;
  2. Change the recommended oil;
  3. Replacing the Oil Resistant Rubber Sheet
  • Why does the cylinder of the เครื่องกดดัด slip?
  1. Dirty or damaged back pressure valve and poppet valve;
  2. Small back pressure;
  3. Glyn ring tension and wear;
  4. Deformation of the inner wall of the cylinder;
  5. If the slider stops at any position and slides slowly, it is normal for the constant temperature to drop less than 0.50 mm in 5 minutes. This phenomenon is mainly due to the characteristics of hydraulic oil.

สารละลาย:

  1. Clean back pressure valve and poppet valve and replace if damaged;
  2. Readjust the back pressure valve pressure according to the standard;
  3. Replace the Glyd ring and inspect the Glyn ring for damage and wear;
  4. Generally due to oil pollution, replace the cylinder and seal;
  5. No processing required.
  • When the bending press machine presses the mold, the reason for the inconsistent heights on both sides?
  1. Inconsistent back pressure on both sides, the back pressure setting may be high.

สารละลาย:

  1. Adjust the back pressure on both sides to the specified value and keep it consistent.
  • The reason why the waiting time of the speed change point is too long when the slider is working forward?
  1. The suction port in the fuel tank is leaking;
  2. The filling valve is faulty, if the installation is not correct, the valve core is stuck, or the spring tension is not enough;
  3. The Y-axis working parameters are set incorrectly.

สารละลาย:

  1. Check the seal of the rubber sheet and reinstall the cover here;
  2. Check the installation of the filling valve, check the movement of the valve core, and check the spring tension;
  3. Adjust the Y-axis working parameters.
  • Why does the length of the workpiece change too much when bending?
  1. The machine inertia parameter setting is inappropriate;
  2. The material for processing the sheet.

สารละลาย:

  1. Readjust the machine inertia parameters;
  2. Check the material of the circuit board.
  • When the workpiece has multiple bends, the reason why the error of the accumulated error is too large?
  1. The workpiece has many bends, resulting in a large cumulative error; the bending sequence is unreasonable.

สารละลาย:

  1. Fine-tune the precision of each bend so that the angles are as negative as possible and the dimensions are as accurate as possible;
  2. If possible, adjust the bending order.
  • The reason why the เครื่องกดดัด system automatically calculates the pressure is greater than the mold resistance?
  1. It is unreasonable to select a die during programming;
  2. The impedance setting of the mold is incorrect;
  3. Incorrect bending method when programming;
  4. Modify machine constant parameters, such as material parameters, unit selection and other parameters;

สารละลาย:

  1. The mold should be selected according to the relationship between the plate thickness and the opening of the lower mold;
  2. Correctly set the mold impedance;
  3. Check programmed procedures;
  4. Check machine constant parameters;
  • When the เครื่องกดดัด is programmed to bend with a large arc, the system calculates slowly or the cause of death?
  1. The X value set during programming exceeds the maximum value of the X axis in the parameter.

สารละลาย:

  1. Check the programmed program.
  • The reason why the bending oil temperature is too high?
  1. Hydraulic part failure, such as filter blockage, oil pollution, deterioration, etc.;
  2. Long-term high pressure work.

สารละลาย:

  1. Check the filter element and oil, replace if necessary;
  2. Check for long-term high-pressure work, whether it is an actual need or other reasons.
  • The reason why the เครื่องกดดัด is not allowed to machine the angle of the workpiece?
  1. If the error is very large, it may be a programming error, the slider connection is loose, the scale is wrong, etc.;
  2. There are usually minor errors that can be corrected on the system. This is normal if it runs stably after calibration;
  3. The angle is unstable and changes frequently, which may be related to the loose connection of the slider, the defect of the scale, the material, etc.

สารละลาย:

  1. Check the operation program, focusing on whether the mold, material, thickness, workpiece length, and bending method are consistent with the actual operation, whether the slider connection is loose, and whether the grating scale connection is safe;
  2. There is a slight error under normal circumstances, which may be caused by various reasons, such as: the error between the programmed material thickness and the actual thickness; the uniformity of the material, the wear of the mold, the operation, etc.;
  3. Check the repeated positioning accuracy of the Y-axis, and check whether the slider connection and the grating ruler connection are normal. If it is normal, it may be related to the material.
  • Which เครื่องกดดัด is easy to use and cheap?

Bending machine from HARSLE machine: good product, low price, fast delivery, good service. The main products of HARSLE machine tools are: down-moving CNC bending machine, down-moving bending machine accessories, down-moving bending machine system, เครื่องดัด CNC frame, CNC bending machine mold.

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2 คิดเกี่ยวกับ “17 Common Problems And Solutions You Should know For Bending Machines

  1. Taylor พูดว่า:

    Thanks for your solution about bending machines, It’s useful for me to use your press brake.

    1. Mayo พูดว่า:

      Thanks for your support. have a nice day!

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