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The working principle of grinding and polishing of abrasive belt grinding
Abrasive belt grinding in fact is abrasive belt machine, abrasive belt, which is a special form of grinding tools, with tensioning structure of the tension and the driving wheel to make high-speed movement, and under certain pressure, abrasive belt surface contact with the workpiece to achieve the whole process of grinding.
Broadly speaking, abrasive belt grinding and the grinding wheel is the same high speed micro ductile cutting tool, grinding grain of micro cutting, and the formation of the cumulative effect, so the grinding mechanism of roughly the same. But due to different abrasive belt structure characteristic and using mode, so that the belt grinding regardless of in grinding mechanism but also the comprehensive grinding properties are different from grinding wheel, main show is in:
1) grinding wheel is rigid contact grinding and abrasive belt grinding is grinding of elastic contact, and the same is true even in the case of using inelastic steel contact wheel, therefore a component of belt material, binder has certain elasticity, not to mention the most numbers are the elastic rubber contact wheel. Because of this, abrasive belt grinding in addition to the wheel with the same sliding rubbing, tillage plough and cutting foreign and grinding particle on the surface of the workpiece to compression, and produce plastic deformation, chilled layer changes and torn surface and the friction of the contact point caused by temperature rise, thermal plastic flow. And this is the reason that the surface quality of the sand belt grinding is higher than that of the grinding wheel.
2) the distribution of the abrasive grains on the surface of the grinding wheel is random and irregular. In the practical grinding, the abrasive grains are carried out by the large negative rake angle, the small back angle and even the negative angle. Abrasive belt is different, the wear particle geometry is the Yangtze River Delta and use more static sik sand and a series of advanced technology production, grinding particle size and distribution uniformity, high performance, and blade tip outward form planted in the abrasive surface of the substrate, revealing complex belt layer is part of the larger. So abrasive abrasive ratio of grinding wheel of the grinding particle sharp, cutting conditions better, grinding material deformation small, high removal rate, grinding force and the resulting smaller grinding heat, grinding temperature low.
3) the perimeter of the belt from the design point of view can be far more than the wheel circumference, which makes the belt grinding both have good heat dissipation condition, and through belt hanging part at run time oscillation will stick on the abrasive belt grinding chip natural shake out, further reducing abrasive is packing, thereby reducing the frictional heating, which is also of low grinding temperature and reasons.
4) the grinding wheel is filled with a combination of particles, the space of the chip is very small. And abrasive intergranular volume chip space generally at least 10 times larger than that of the grinding wheel, combined with grinding grain high performance. Therefore, the abrasive particle effective cutting area and cutting ability than the grinding wheel is strong and debris at any time directly away, very few residual on the surface of the belt caused by obstruction, without thereby increasing the friction heat and temperature in the grinding zone is low.
Thus, the processing mechanism of abrasive belt grinding is with grinding wheel and different from the grinding wheel of a more complex form, which is the theoretical basis of the study on the mechanism of abrasive belt grinding and the fundamental starting point.
Abrasive belt grinding in fact is abrasive belt machine, abrasive belt, which is a special form of grinding tools, with tensioning structure of the tension and the driving wheel to make high-speed movement, and under certain pressure, abrasive belt surface contact with the workpiece to achieve the whole process of grinding.
Broadly speaking, abrasive belt grinding and the grinding wheel is the same high speed micro ductile cutting tool, grinding grain of micro cutting, and the formation of the cumulative effect, so the grinding mechanism of roughly the same. But due to different abrasive belt structure characteristic and using mode, so that the belt grinding regardless of in grinding mechanism but also the comprehensive grinding properties are different from grinding wheel, main show is in:
1) grinding wheel is rigid contact grinding and abrasive belt grinding is grinding of elastic contact, and the same is true even in the case of using inelastic steel contact wheel, therefore a component of belt material, binder has certain elasticity, not to mention the most numbers are the elastic rubber contact wheel. Because of this, abrasive belt grinding in addition to the wheel with the same sliding rubbing, tillage plough and cutting foreign and grinding particle on the surface of the workpiece to compression, and produce plastic deformation, chilled layer changes and torn surface and the friction of the contact point caused by temperature rise, thermal plastic flow. And this is the reason that the surface quality of the sand belt grinding is higher than that of the grinding wheel.
2) the distribution of the abrasive grains on the surface of the grinding wheel is random and irregular. In the practical grinding, the abrasive grains are carried out by the large negative rake angle, the small back angle and even the negative angle. Abrasive belt is different, the wear particle geometry is the Yangtze River Delta and use more static sik sand and a series of advanced technology production, grinding particle size and distribution uniformity, high performance, and blade tip outward form planted in the abrasive surface of the substrate, revealing complex belt layer is part of the larger. So abrasive abrasive ratio of grinding wheel of the grinding particle sharp, cutting conditions better, grinding material deformation small, high removal rate, grinding force and the resulting smaller grinding heat, grinding temperature low.
3) the perimeter of the belt from the design point of view can be far more than the wheel circumference, which makes the belt grinding both have good heat dissipation condition, and through belt hanging part at run time oscillation will stick on the abrasive belt grinding chip natural shake out, further reducing abrasive is packing, thereby reducing the frictional heating, which is also of low grinding temperature and reasons.
4) the grinding wheel is filled with a combination of particles, the space of the chip is very small. And abrasive intergranular volume chip space generally at least 10 times larger than that of the grinding wheel, combined with grinding grain high performance. Therefore, the abrasive particle effective cutting area and cutting ability than the grinding wheel is strong and debris at any time directly away, very few residual on the surface of the belt caused by obstruction, without thereby increasing the friction heat and temperature in the grinding zone is low.
Thus, the processing mechanism of abrasive belt grinding is with grinding wheel and different from the grinding wheel of a more complex form, which is the theoretical basis of the study on the mechanism of abrasive belt grinding and the fundamental starting point.
