During the production and processing of cutting wheels, we often find that the cutting discs are broken. Here are some opinions on the problem of breaking.
First, the machine breaks when idling: When the cutting table is installed, it must be idling for one minute. There are two main factors for the breakage during this process. One is that the cut off wheel is a low-quality product and does not reach the linear speed of the cutting table. In addition, the aperture of the cutting wheel and the cutting table axis are not equipped, and there is a large stress during assembly.
Second, the cutting disc breaks during use: We often see that the cut off wheel is normal at the beginning of use, and the grinding wheel breaks when the cutting is usually 1/3 of the state. Through analysis, the following reasons may be:
The flatness of the cutting wheel is poor, the cutting disc structure is uneven, the hardness of the cut off wheel is high, and the resin of the cutting wheel lacks toughness. When the flatness of the cutting disc is poor, the cutting surface is curved. As the cutting depth increases, the lateral stress of the cutting disc increases. Multiple round trips will cause cracks in the grinding wheel, resulting in "soft film", and it will break if it continues to be used. When the cutting wheel structure is uneven, with the torque, thermal stress, vibration and other factors in thecutting process, stress will accumulate in the weak tissue, leading to rupture.
When the hardness of the cut off wheel is too high, the radial torque force on the cutting disc will increase. Since the thickness of the cutting wheel is usually less than 4mm, it will cause the cutting disc to break.
When the resin lacks toughness, the grinding wheel is always in a negative pressure state during the cutting process, which inevitably generates lateral stress. When the cut off wheel cannot resist the lateral force, it will cause the grinding wheel to break.
