Cold grinding

Cold grinding
The surface quality of abrasive belt grinding workpiece is high. This is not only because of its multiple functions of grinding, grinding and polishing, but also because: compared with grinding wheel grinding, abrasive belt grinding has the name of "cold grinding", that is, the grinding temperature is low and the workpiece surface is not easy to burn.
Grinding vibration
The abrasive belt grinding system has small vibration and good stability. Due to the light weight of the abrasive belt itself, the balance state of its grinding process structure system is easy to control, and all rotating parts (such as contact wheel, drive wheel, tension wheel, etc.) are extremely worn, and there will be no dynamic unbalance factors like grinding wheel.
In addition, the elastic grinding effect of abrasive belt can greatly reduce or absorb the vibration and impact generated during grinding. The grinding speed is stable, and the abrasive belt drive wheel will not be as slow as the grinding wheel.
Roughness
The high surface quality of abrasive belt grinding workpiece is mainly manifested in small surface roughness, good residual stress state, and no micro-cracks or metallographic changes on the surface. In terms of surface roughness, abrasive belt grinding has reached Ra0.01mm by 2012, achieving the effect of mirror grinding, while it is very easy to achieve the roughness value above Ra0.1mm. The residual stress on the surface of abrasive belt grinding workpiece is mostly compressive stress, and its value is generally - 60~- 5Kg/mm ²， However, grinding with grinding wheel is mostly tensile stress, so abrasive belt grinding is very helpful to strengthen the surface of the workpiece and improve the fatigue strength of the workpiece.
Grinding accuracy
High grinding accuracy of abrasive belt. Due to the improvement of the manufacturing quality of abrasive belt and the production level of abrasive belt grinding machine, abrasive belt grinding has already entered the ranks of precision and ultra-precision machining, with the highest precision reaching below 0.1mm.
Grinding cost
The cost of abrasive belt grinding is low. This is mainly reflected in:
Belt grinding equipment is simple. Compared with the grinding wheel grinder, the abrasive belt grinder is much simpler, mainly because the abrasive belt is light, the grinding force is small, and the vibration during the grinding process is small. The requirements for the rigidity and strength of the machine tool are far lower than that of the grinding wheel grinder.
Abrasive belt grinding is easy to operate with less auxiliary time. Whether it is manual or motorized abrasive belt grinding, its operation is very simple. From replacing and adjusting the abrasive belt to clamping the workpiece to be processed, all these can be completed in a very short time.
The abrasive belt grinding ratio is large, the machine power utilization rate is high, and the cutting efficiency is high. This reduces the cost of tools and energy for cutting materials of the same weight or volume, and the occupation time is short.
Grinding safety
Belt grinding is very safe, low noise and dust, easy to control, and good environmental benefits.
Because the sand belt itself is light, there is no danger of injury even if it is broken. The abrasive belt grinding is not as serious as the grinding wheel. Especially in dry grinding, the abrasive debris is mainly the material of the workpiece to be processed, and it is easy to recover and control the dust. Due to the use of rubber contact wheel, abrasive belt grinding will not form a rigid impact on the workpiece like the grinding wheel, so the processing noise is very small, usually<70dB. It can be seen that abrasive belt grinding is also worth promoting from the perspective of environmental protection.
The abrasive belt grinding process is flexible and adaptable. This is reflected in:
Abrasive belt grinding can be very convenient for grinding plane, inner, outer circle and complex curved surface. A belt grinding head device is designed as a functional part, which can be installed on the lathe for rear grinding, and can also be installed on the planer for use. At the same time, it can also be designed as a variety of special grinding machines. Using this feature of abrasive belt grinding can easily solve the precision machining of some difficult parts, such as ultra-long, ultra-large shafts and plane parts.
The base material, abrasive and binder of abrasive belt have a wide selection range, which can meet the needs of various applications. The size, length and width of the abrasive belt also have various specifications, and there are many forms to choose from, such as roll and ring.
For the same workpiece, abrasive belt grinding can adopt various grinding methods and technological structures for processing.
The application range of abrasive belt grinding is extremely wide. The superior grinding performance and flexible process characteristics of abrasive belt determine its extremely wide application range. From daily life to industrial production, abrasive belt grinding covers almost all fields. Its variety of application forms and wide range are unmatched by any other processing method. Specific performance:
Abrasive belt grinding can grind almost all engineering materials. In addition to grinding materials that can be processed with grinding wheels, it can also process non ferrous metals such as copper and aluminum, and non-metallic soft materials such as wood, leather, and plastics. In particular, the "cold" grinding effect of abrasive belt grinding makes it more unique in processing heat-resistant and difficult grinding materials.