channel steel three faces when we use it, there may be some malfunctions, some we can find in time to solve, and some we can not solve, the following Xiaobian summarized to you some common faults and solutions:       1, channel steel three face spray weak &Cause of failure: low pressure of compressed air or air leakage in air circuit. < br style = "list style type: none;" / > & nbsp; & nbsp; & nbsp; solution: adjust the air source pressure and repair the gas path. It is of great significance that we must remember the above mold replacement methods and precautions. The position error of three side punching hole in channel steel is too large < br style = "list style type: none;" / > & nbsp; & nbsp; causes: ① excessive eccentricity of bit installation; ② improper grinding edge of bit; ③ large error of relative positioning axis or detection axis < br style = "list style type: none;" / > & nbsp; & nbsp; & nbsp; Troubleshooting: adjust the installation accuracy and positioning shaft of the drill bit, and carefully grind and grind the drill bit. < br style = "list style type: none;" / > & nbsp; & nbsp; & nbsp; 3. The wear rate of channel steel three side punch bit is too fast < br style = "list style type: none;" / > & nbsp; & nbsp; & nbsp; fault causes: ① poor bit material or annealing; ② high ROP of spindle; ③ too large or too small feed rate; ④ poor cooling part; ⑤ too little coolant flow < br style = "list style type: none;" / > & nbsp; & nbsp; & nbsp; Troubleshooting: change the bit with better quality, reduce the drilling speed of the spindle, adjust the feed rate or check the air pressure to increase the liquid volume. The reasons for the failure are as follows: (1) the throttle valve is not adjusted properly; (2) the pressure of the pressure reducing valve is too low; (3) the drill bit is not well grinded or the cross cutting edge is not repaired; (4) the drill bit is blunt or annealed; &Troubleshooting: carefully adjust throttle valve, readjust pressure reducing valve and grinding bit < br style = "list style type: none;" / > & nbsp; & nbsp; & nbsp; & nbsp; the above is the fault and solution of channel steel three side punch. If this situation occurs during use, you can use the above methods to solve it, so as to restore the normal work of the machine.