The cracking of the band saw blade is also a common problem in the process of using the band saw blade, which not only affects the cutting quality, but also causes waste in procurement, which is one of the problems of the band saw blade that needs to be solved urgently.
The cracks of the band saw blade, which is what we often call the cracking of the saw blade, are mainly the cracking of the teeth of the saw blade and the cracking of the back of the saw blade.
Because if it is a crack in the weld part, it is often due to the problem of the welding process, either caused by the welding method, or there is a problem in the details of parameter adjustment during the welding process. In the specific case, if there is a problem, you can seek a solution from the buyer, and generally re-weld the weld fee, if it is not the problem of the weld position, then there are relatively more places to check. The common ones are mainly excluded from the following 6 points.
However, first of all, it must be emphasized that the new saw blade must be run in and run in sufficiently, otherwise the band saw blade is prone to cracking.
1.The band saw blade is too tight.
After the band saw blade is installed, check whether the tension is appropriate, and the good tension is about 300Nmm2. If the band saw blade is stressed too much, it can lead to early cracks.
2.The guide blocks are badly worn or in poor contact.
3.The spacing between the guide arms is too large.
The spacing of the guide arms should be selected according to the width of the material to be cut, and the spacing of the guide arms should be about 40mm wider than the width of the material to be cut. If the spacing is too wide, the band saw blade is prone to cracking or breaking under stress.
4.The effect of the back pressure wheel of the sawing machine.
The gap of the back pressure wheel is improper, and the pressure on the back of the band saw blade is too heavy, which makes the tension of the teeth of the band saw blade too large and produces cracks. Generally, the back pressure wheel clearance is adjusted to 0-005mm。If the back pressure wheel is severely worn (see the figure below), it will also cause the saw blade to float as a whole, and the root of the saw tooth and the clamp will interfere with the wear, which will lead to the cracking of the groove and back.
5.The impact of sawing machine pulleys
a.The wear of the outer and inner circular surfaces of the pulley will also cause cracks in the teeth and back of the saw blade. b.The distance between the shoulder of the pulley and the back of the saw should generally be controlled at 0Clearance of 3-1 mm. The back of the band saw blade interferes with the rim, which is easy to cause back cracks. c.The poor parallelism of the main and driven wheels of the sawing machine will also cause the saw blade to twist and run, and early fatigue breakage will occur.
6.Band saw blade parameters are affected
Excessive feed and fast linear speed of the band saw blade are prone to tooth cracks. 7.The wire brush did not remove the chips effectively. Chips remain in the groove or are carried to the saw wheel to stay, and cracks can occur when the band blade is repeatedly in contact with it. The above improper operation and mistakes are the reasons for the cracks of the band saw blade, only by carefully learning and fully understanding the knowledge and skills of the band saw machine and band saw blade, can we improve the use effect of the band saw blade and make full use of the effective service life of the band saw blade!
In particular, the band saw blade purchaser is that the saw blade cracking problem is relatively comprehensive except for the welding joint due to welding problems, involving the level of personnel operation, the quality and selection of the saw blade and the status of the band sawing machine equipment, although we unanimously emphasize that the employees are many years of master level, but considering the factory's requirements for the amount of tasks and has not undergone systematic cutting training, so, please contact us in time if there is a problem.