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Abrasive belt grinding method
Abrasive belt grinding method
Abrasive belt grinding is a belt, which is a special form of coated abrasives, with tensioning mechanism in the tensioning, and 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 motion of micro cutting tool "-- wear particles micro cutting and the formation of cumulative effect, so the grinding mechanism of roughly the same. But because the belt itself form characteristic and the use of different ways, so that no matter in grinding
The mechanism of grinding is different from that of grinding wheel in grinding performance:
(1) grinding is a rigid contact grinding, and grinding is grinding of elastic contact, and even when using inelastic steel contact wheel is also so, because belt is composed of substrate, binder has certain elasticity, not to mention the most cases are the elastic rubber contact wheel.
Because of this, abrasive belt grinding in addition to the wheel with the same sliding rubbing, ploughing and cutting action outside and grinding particle on the surface of the workpiece to compression, and produce plastic deformation, chilled layer and surface tear, and due to the friction of the contact point temperature increased, the heat caused by the plastic flow and so on. So, from this point of view, the multiple effects of abrasive belt grinding with grinding, grinding and polishing. This is the reason of abrasive belt grinding surface quality.
On the other hand, due to the elastic characteristics of abrasive belt grinding, still make the sand in the grinding area contact with the workpiece length ratio of grinding wheel and also participate in the grinding of the grinding grain number and single grinding grain by the load is small and uniform, grinding particle breakage of small. The belt wear is much smaller than the wheel to.
(2) the distribution of the abrasive grains on the surface of the grinding wheel is random and irregular. The wear particles are cut by the large negative rake angle, the small back angle and even the negative rake angle. Abrasive belt is different, the abrasive belt is specially made for, grinding 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 is outward blade tip in the form of planting on the belt on a surface of a substrate, revealing complex layer of the 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 grinding wheel is filled with a combination of particles, and 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, little residue on the surface of the belt caused by congestion, without thereby increasing frictional heating, grinding zone temperature low.
The perimeter of the belt (4) from the design point of view, far more than the wheel circumference, which makes the belt in grinding is a good heat dissipation area, and by overhanging part at runtime the oscillation of the belt, stick on the abrasive belt grinding chip natural shake out, further reduce the abrasive is packing, thereby reducing the frictional heating, which is also of low grinding temperature a.
Abrasive belt grinding is a belt, which is a special form of coated abrasives, with tensioning mechanism in the tensioning, and 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 motion of micro cutting tool "-- wear particles micro cutting and the formation of cumulative effect, so the grinding mechanism of roughly the same. But because the belt itself form characteristic and the use of different ways, so that no matter in grinding
The mechanism of grinding is different from that of grinding wheel in grinding performance:
(1) grinding is a rigid contact grinding, and grinding is grinding of elastic contact, and even when using inelastic steel contact wheel is also so, because belt is composed of substrate, binder has certain elasticity, not to mention the most cases are the elastic rubber contact wheel.
Because of this, abrasive belt grinding in addition to the wheel with the same sliding rubbing, ploughing and cutting action outside and grinding particle on the surface of the workpiece to compression, and produce plastic deformation, chilled layer and surface tear, and due to the friction of the contact point temperature increased, the heat caused by the plastic flow and so on. So, from this point of view, the multiple effects of abrasive belt grinding with grinding, grinding and polishing. This is the reason of abrasive belt grinding surface quality.
On the other hand, due to the elastic characteristics of abrasive belt grinding, still make the sand in the grinding area contact with the workpiece length ratio of grinding wheel and also participate in the grinding of the grinding grain number and single grinding grain by the load is small and uniform, grinding particle breakage of small. The belt wear is much smaller than the wheel to.
(2) the distribution of the abrasive grains on the surface of the grinding wheel is random and irregular. The wear particles are cut by the large negative rake angle, the small back angle and even the negative rake angle. Abrasive belt is different, the abrasive belt is specially made for, grinding 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 is outward blade tip in the form of planting on the belt on a surface of a substrate, revealing complex layer of the 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 grinding wheel is filled with a combination of particles, and 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, little residue on the surface of the belt caused by congestion, without thereby increasing frictional heating, grinding zone temperature low.
The perimeter of the belt (4) from the design point of view, far more than the wheel circumference, which makes the belt in grinding is a good heat dissipation area, and by overhanging part at runtime the oscillation of the belt, stick on the abrasive belt grinding chip natural shake out, further reduce the abrasive is packing, thereby reducing the frictional heating, which is also of low grinding temperature a.
