Common troubleshooting of the hottest qzx1300b pap

2022-07-26
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Common troubleshooting of qzx1300b paper cutter

qzx1300b paper cutter is a medium-sized paper cutter with good cutting performance, which is suitable for cutting paper of various formats, finished printing products and other soft materials similar to paper

the gantry type main body of the machine is composed of front and rear frames, cutter bed and machine base. The workbench lies horizontally in the frame and extends forward and backward to form the whole main body. The paper pressing mechanism is driven by hydraulic pressure. The paper cutting mechanism is driven by the worm through hydraulic friction clutch to drive the worm wheel to drag the cutter bed. The pull rod of the drag cutter bed is equipped with an over cutting safety device. The workbench is equipped with a separate motor-driven paper pusher, air cushion device and digital display device. The machine is also equipped with photoelectric safety device and tool changing device. The cutting action is completed by pressing the electric button. Therefore, the machine has the characteristics of high pressure, accurate cutting, light operation, safety and reliability, such as greater product design freedom, weight reduction, shortening product development cycle, and greatly improving the effectiveness of sample production, additional production of parts and mass customization

paper pusher fault and troubleshooting

fault phenomenon: the paper pusher makes a squeaking sound during the forward and backward movement, especially during the backward movement

fault analysis: the paper pusher moves by pulling out the handwheel in front of the workbench or pressing the button in the center of the handwheel, so as to make the paper pusher motor rotate forward or backward, and drive the filament rod to rotate through the triangular belt to drive the paper pusher to make a round-trip movement. The paper pusher and the driving filament screw are connected through the lead screw nut. However, in the actual paper cutting process, the gap between the two is changed due to frequent paper collision. When the gap between the two is too large, it will make a squeaking sound during the forward and backward movement of the paper pusher

Troubleshooting: open the socket head cap screw of the back cover of the lead screw nut, and rotate the back cover clockwise. Increase the supporting force of the three supporting springs, reduce the clearance between the lead screw and the nut, and then fix the nut gland again

note: the force of the support spring should not be adjusted too much. If it is too large, the paper pusher will not move smoothly back and forth

paper cutter failure and troubleshooting

failure phenomenon: during the cutting process, the safety screw on the safety device is broken, making the cutter bed stop falling

fault analysis: the cutter uses the main motor to drive the large V-belt pulley through the V-belt, drives the worm shaft and worm gear through the hydraulic friction clutch, and the adjustable pull rod group pulls the cutter bed to achieve the cutting purpose. The main reason for the breakage of the safety bolt is that the lower guide rail of the cutter bed is poorly lubricated, which makes the lower resistance of the cutter bed too large. When the machine is manually operated, it feels very heavy. When the operator applied grease to the lubricating points during use, he only noticed that there was grease emerging from the lubricating part, but in fact, there was no grease injected into the guide rail of the cutter bed. During long-time operation, the guide rail is short of oil, and the falling resistance of the cutter bed is too large, resulting in breaking of the safety screw. In addition, the fault can also be caused by the too deep cutting depth of the paper cutter into the blade cushion. Generally, the cutting depth is required to be 0.5 ~ 1mm. If the cutting depth is too deep, the pulling force of the tool bed pulling component exceeds the anti tension value of the safety bolt. In addition, when the blade is too blunt and hard cutting objects are encountered, excessive paper cutting force will also break the safety bolt

Troubleshooting: regularly fill the guide rail of the cutter bed with grease. When filling grease, do not think that the grease is full just because there is grease overflow at the oil filler, but check that there is new grease overflow at the cutter bed and the guide rail. Check whether the depth of cutting into the blade cushion is 0.5 ~ 1mm when the paper cutter drops to the lowest point. If this condition is not met, the nut can be adjusted appropriately. Pay attention to always polish the cutting knife to keep it sharp

cutting knife pauses during cutting and troubleshooting

fault phenomenon: during cutting, the paper knife pauses in the middle. During a cutting process, you need to press the cutting button twoorthree times to complete a cutting. Sometimes, the paper knife does not cut at all, and the red and green indicators on the left and right sides flash at the same time

fault analysis: six pairs of electronic eye safety protection devices are installed on both sides of the front operating surface of the machine. The right side is the transmitting end and the left side is the receiving end. The formula for calculating the frequency of the smooth crossing point of the constant vibration level sweep experiment of each pair of electronic eyes. The working state is indicated by a light-emitting diode. Under the normal operation of the machine, if there is no object blocking, the red indicator light on the left side of the operation surface is on. When the cutting button is pressed, the red indicator light is off, the green indicator light is on, and the paper cutting operation is normal. If the red and green lights flash, it means that there are objects blocked, but in fact there are no objects blocked. What is the reason? Through inspection, it was found that the paper wool and dust fell on the electronic eye glass on both sides of the machine operation surface during the paper handling process. Because the light is partially blocked, the red and green indicator lights flash, and the paper cutter stops in the descending process

Troubleshooting: open the side plates on both sides of the machine, remove the electronic eye, wipe the spherical glass at the front end of the electronic eye with an alcohol cotton ball, and then fix it again. Troubleshooting

blade breaking fault and troubleshooting

fault phenomenon: replace the newly sharpened paper cutter, and the blade will break at several points just after cutting

fault analysis: the flatness and smoothness of the cutting edge of the cutting object depend on the selection of the blade grinding angle, the grinding quality and the reasonable grinding clearance time of the blade. The blade angle is generally about 19 °. When cutting hard paper, the blade angle can be slightly larger. During each grinding, pay attention to whether the coolant is sufficient to avoid edge annealing. In order to make the cutting edge sharper and smoother, the cutting edge shall be finely ground with an oilstone before cutting. At the same time, some soap and paraffin shall be often applied on the cutting edge to prolong the service life of the cutting edge and make the finished edge smoother. If there is paper pulling on some cutting surfaces during cutting, it shall be polished with an oilstone at any time. In the actual operation process, the operator often shortens the grinding time when grinding the blade. In addition, if the coolant is not enough, the edge will be annealed. After sharpening, the actual width of the knife becomes narrower. After installing a new sharpened blade, the nut must be readjusted to make the blade cut into the blade pad. If the adjustment is not good, it is easy to make the cutting edge cut into the depth of the blade cushion too deep, resulting in edge collapse

Troubleshooting: when sharpening the cutting edge, it is necessary to master the feed amount, which should not be too large or too small. Too large or too small is easy to anneal the blade and reduce its strength. The grinding angle must be well controlled, generally around 19 °. After the newly ground blade is installed, the machine must be rotated with the handle and long bolts to gradually lower the tool bed. When the blade drops to the lowest point, the depth of the blade cutting into the blade cushion is 0.5 ~ 1mm. When the cutter bed descends to the lowest point, the blade has not been cut to the blade cushion, and the adjusting nut can be adjusted to meet the requirements. It is strictly prohibited to use the machine tool to test the cutter directly without manually lowering the cutter bed to the lowest point after adjusting the nut, which is easy to cause blade collapse or pull off the safety bolt

(Wang Qitian, 72946 Army)

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