Brief introduction of the hottest abrasive belt gr

After nearly three decades of development, belt grinding has become a relatively complete and self-contained new processing technology. Because of its high processing efficiency, wide application range, strong adaptability, low cost, safe and convenient operation, it is favored by users. In foreign countries, abrasive belt grinding technology has made great progress, and its processing objects and application fields are becoming more and more extensive. It can process almost all engineering materials, from general daily life appliances to large Aerospace appliances, and has become an important means to obtain significant economic benefits. As a processing technology, it has been paid more and more attention and developed rapidly because it has the following important characteristics:

belt grinding is an elastic grinding, which is a composite processing technology with the functions of grinding, grinding and polishing

as shown in Table 1 (next page)

the abrasive grains on the abrasive belt have stronger cutting ability than the abrasive grains of the grinding wheel, so its grinding efficiency is very high. The high efficiency of abrasive belt grinding is reflected in its high removal rate, grinding ratio (the ratio of the weight of the removed workpiece to the weight of abrasive wear) and machine tool power utilization. At present, the removal rate of steel by abrasive belt grinding has reached 700mm3/mm · s, even more than turning or milling. The grinding ratio of the abrasive belt is much higher than that of the grinding wheel, as high as 300:1, or even 400:1, while the grinding wheel is only 30:1. The power utilization rate of abrasive belt grinding machine has reached 80% in the early stage of the development of abrasive belt grinding, leading other machine tools, and now it is as high as 96%. Compared with abrasive belt grinding machine, only 52%, milling machine 57%, lathe 65%, so abrasive belt grinding is still a good energy-saving processing technology

abrasive belt grinding has high surface quality. This is not only because it has multiple functions of grinding, grinding and polishing, but also because:

compared with wheel grinding, abrasive belt grinding is known as "cold grinding", that is, the grinding temperature is low, and the workpiece surface is not prone to burns and other phenomena

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 wheels, drive wheels, tension wheels, etc.) are extremely worn, so there will be no dynamic imbalance factors like grinding wheels

in addition, the elastic grinding effect of the abrasive belt can greatly reduce or absorb the vibration and impact generated during grinding

the grinding speed is stable, and the belt drive wheel will not be as slow as the grinding wheel. The smaller the diameter, the slower the speed

high surface quality of abrasive belt grinding workpiece is mainly manifested in small surface roughness value, good residual stress state, and no micro cracks or metallographic structure changes on the surface

in terms of surface roughness, abrasive belt grinding has reached ra0.01mm, which achieves the effect of mirror grinding. For the case of roughness value above ra0.1mm, it is very easy to achieve under the same output and melt quality

the residual stress on the workpiece surface during abrasive belt grinding is mostly in the state of compressive stress, and its value is generally -60~-5kg/mm. 37% is bio derived materials, while the grinding wheel grinding is mostly tensile stress, so abrasive belt grinding is very conducive to strengthening the workpiece surface and improving the fatigue strength of the workpiece

abrasive belt grinding has high accuracy. Due to the improvement of the manufacturing quality of abrasive belt and the production level of abrasive belt grinder, abrasive belt grinding has already stepped into the ranks of precision and ultra precision machining, and the maximum accuracy has reached below 0.1mm

abrasive belt grinding cost is low. This is mainly reflected in:

belt grinding equipment is simple except for the experiments of stretching, tightening, ring stiffness, compression resistance, ring flexibility and so on. Compared with the grinding wheel grinder, the abrasive belt grinder is much simpler, mainly because the abrasive belt is light in weight, the grinding force is small, and the vibration in the grinding process is small. The rigidity and strength requirements of the machine tool are far lower than those 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 machined workpiece, all this can be completed in a very short time

the abrasive belt grinding ratio is large, the power utilization rate of the machine tool is high, and the cutting efficiency is high

this reduces the cost of tools and energy consumed by cutting materials of the same weight or volume, and the occupation time is short

belt grinding is very safe, with low noise and dust, easy to control, and good environmental benefits

because the sand belt itself is light, even if it breaks, it will not hurt people. Belt grinding is not as serious as grinding wheel in desanding. Especially in dry grinding, the grinding debris mainly consists of the material of the workpiece being processed, which is easy to recover and control 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