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  • Safety and maintenance of the guillotine shear

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
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  • Guillotine Shear Hub
  • Safety and maintenance of the guillotine shear

Safety and maintenance of the guillotine shear

Table of Contents
  • Maintenance of the guillotine shear
  • Tips for maintenance

For safe operation, machines using mechanical, hydraulic, electrical and electronic devices are high-risk machine tools. Except those listed in this manual, other maintenance must be carried out by professional maintenance personnel.

Maintenance of the guillotine shear #

Daily maintenance

  • Keep the equipment clean and intact without corrosion.
  • Check whether the tool is sharp and free of wear, and lightly oil the tool for maintenance.
  • Check that the NC device is normal without alarm.
  • Check that all switch buttons are normal and free from jamming.

Weekly maintenance

  • Check whether the hydraulic oil level is within the normal range.
  • Check the rear stop ball screw, lubricate it with grease once, and wipe off dust and oil stain.
  • Check the rear retaining support bearing and add lubricating grease.
  • Check the slide guide rail and fill it with grease
  • Check the water level in the filter pressure reducing valve and remove it in time.
  • Check the easily worn parts and roller bearings without lubrication points, and add oil for lubrication.

Monthly maintenance

  • Check and clean the air filter and replace it if necessary.
  • Check the conductor and cable sheath for damage and insulation.
  • Check whether the signs and warning nameplates on the equipment are clear and exist.
  • Check whether the anti pinch device of the machine is intact without looseness.

Quarterly maintenance

  • Check whether the boom adjustment of the ram is loose.
  • Check whether the positioning position error of the rear stop exceeds + – 0.1mm.
  • Check whether the air valve of the air circuit system acts flexibly.
  • Check all valve bodies, oil pipes and joints of the hydraulic system for leakage and blockage.
  • Check whether the electrical components inside and outside the electrical cabinet are worn, loose or have poor contact.

Half-year maintenance

  • Check and clean the inlet filter of the oil pump and replace it if necessary.
  • Check the filter pressure reducing valve and oil mist of the air circuit system for cracks and air leakage.

Yearly maintenance

  • Clean the oil tank, oil pump inlet filter and add new hydraulic oil. (replace every 2000h or one year for the first time and every 4000h or two years thereafter)

Tips for maintenance #

1. The machine must be in the charge of a specially assigned person. The operator must read the manual and CNC system operation manual before operating the machine.

2. When more than one person operates the machine, one person must be designated to start the machine. Only when it is confirmed that there are no unsafe factors can the foot switch or button be pressed to avoid accidents.

3. When placing the sheet metal on the workbench and positioning with the rear retaining material, the fingers shall not be placed between the sheet metal and the workbench. Before the rear stopper reaches the positioning point, the sheet metal shall not be pushed for positioning to avoid injury.

4. When the machine is working, no tools or sundries shall be placed between the worktable and the knife edge, and there shall be no defects such as welding scar on the workpiece surface to avoid damaging the blade.

5. The shearing must be carried out in strict accordance with the thickness, material and width of the shearable plate, which can be calculated automatically by the NC system. Overload is not allowed to avoid damaging the machine.

6. Electrical insulation and grounding must be safe and reliable.

7. Maintenance of hydraulic system:
1) Regularly check the oil level of the oil tank. If it is insufficient, add filtered clean hydraulic oil. The machine uses Yb (or YC) – N32 (or N46) hydraulic oil. The oil used for the first time must be cleaned and replaced with new oil after 2000 working hours, and then replaced every 2 years or 4000 working hours; The hydraulic oil will gradually age and deteriorate during use, and it must be replaced in time to a certain extent. Only in this way can we ensure the lubrication of all moving parts in the hydraulic system, reduce friction and wear, and ensure that the system can work normally for a long time
2) One month after the commissioning of the machine, the oil filter shall be cleaned for the first time (cleaned and dried with gasoline or trichloroethylene), and then cleaned regularly every two months; In case of blockage (the signal indicator light is on) or oil pump screaming (the oil pump is empty), clean the oil filter immediately; If the oil filter is found to be broken, replace it immediately.
3) The air filter installed on the oil tank cover plate shall be cleaned regularly with gasoline or trichloroethylene. After two months of machine tool commissioning, it shall be cleaned for the first time, and then cleaned regularly every four months.
4) If the valve block leaks, replace the sealing ring in time.

8. Keep the machine clean and lubricated on time to prolong the service life of the machine. During use, regularly check whether the fasteners of all mechanical parts are loose. If any abnormality is found, stop the machine immediately for inspection, and continue to use after troubleshooting;

9. Check whether the clearance of the knife edge is too large or too small regularly. If there is any change, adjust it in time.

10. Regularly check the sharpness of the blade edge. If the blade edge becomes blunt, it shall be sharpened in time.

11. Conduct regular maintenance, and maintain the accuracy requirements specified in the certificate after maintenance.

12. The safety warnings listed in this manual are set according to the foreseeable situation and are regarded as the minimum requirements. Users are welcome to inform the manufacturer of the actual and potential hazards.

Related:

  • Operation and adjustment of the guillotine shear
  • Lifting and installation of the guillotine shear
  • Main structure of the guillotine shear
  • Hydraulic system of the guillotine shear
  • Accuracy check of the guillotine shear
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Updated on October 5, 2021
Operation and adjustment of the guillotine shearGuillotine Shear: Common Faults and Troubleshooting

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2 thoughts on “Safety and maintenance of the guillotine shear”

  1. yalew
    October 6, 2021 at 3:01 pm

    I need to full manuals

    Reply
    1. Shane
      October 7, 2021 at 10:32 am

      We will keep updating this doc, so stay tuned.

      Reply

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