There are some common faults in the machine during daily use, and the machine tool is no exception. Machine tool users may wish to master some common faults and troubleshooting methods that may occur, so that they have a deeper understanding of the machine, can gain more time for production and processing, and create more benefits for the enterprise.
Common faults and troubleshooting methods of band sawing machine:
1. The band saw blade falls: The reason may be that the saw band is too loose, or the main and driven wheels are not parallel. Remedy: Adjust the saw band tensioning device to maintain the proper tension of the saw band; adjust the three sets of adjustment screws behind the passive wheel to make the main and driven wheels parallel to ensure that the saw blade is in the proper position.
2. Abnormal sound of worm gear box: The reason may be that the axial barrier of the worm gear is too large or the bearings of the two teams are too worn. Remedy: adjust the axial gap of the worm gear or replace the bearing.
3. The saw frame does not rise: It is necessary to check whether the oil pressure reaches the rated pressure, whether the rising solenoid valve is working, whether the upper limit travel switch is reset, and whether the oil circuit is air or blocked. Remedy: oil pressure, adjust the overflow valve to reach the specified pressure; check whether the circuit and oil circuit are unobstructed; check the upper limit switch; clean or replace the oil filter and solenoid valve, etc.
Fourth, the saw band does not fall: the adjustment valve is blocked; it may be that the descending solenoid valve does not work; check whether the lower limit travel switch is reset; check whether the back pressure is adjusted too large. Remedy: Check and clean the speed control valve; check whether the circuit and oil circuit are connected; check the upper limit travel switch; adjust the back pressure to reach the specified value.
5. When sawing, the saw frame vibrates severely or makes abnormal noises: it may be that the gap between the column and the sliding sleeve is too large; or the sawing material and speed are not selected correctly; or the gap between the saw band and the upper guide block is too large. Remedy: replace the copper sleeve; re-select the saw blade speed; adjust the guide block.
Sixth, the workpiece is severely skewed: the main reason is the excessive feed; the saw tooth is dull or the split tooth is asymmetry; the distance between the two guide arms is too large; whether the saw band has been tightened; whether the two guide blocks have been tightened; The work surface, the fixed vise and the saw band are not perpendicular. Remedy: make the feed rate appropriate; replace the band saw blade; make the distance between the two guide arms consistent with the workpiece; keep the saw band at a proper tension; tighten the two guide blocks; adjust the guide arm to be perpendicular to the fixed vise and the work surface.