Abrasive belt grinding characteristics
Abrasive belt grinding and the grinding wheel is the same high-speed movement of the" micro cutting tool" -- abrasive micro cutting and forming the cumulative effect, so the grinding mechanism of roughly the same. But because the belt itself form characteristics and use in different ways, so that the abrasive belt grinding in grinding mechanism, or the grinding performance are different from the grinding wheel, which is mainly shown in the:
(1) in addition to having the same belt grinding wheel sliding, plow and cutting effect, and abrasive particles on the surface of the workpiece and the extrusion effect, so that the plastic deformation, chilled layer change and surface tear, and due to the friction point of contact temperature rise, caused by the flow of the thermoplastic comprehensive effect. So, from this point of view, abrasive belt grinding with grinding, grinding and polishing of the multiple roles. This is the reason of abrasive belt grinding surface quality. On the other hand, because of the elastic characteristics of abrasive belt grinding, abrasive belt grinding area also in contact with the workpiece length ratio of grinding wheel in grinding, abrasive number, single diamond grain by the load is small, and uniform, wear particle breakage of small.
(2) selected acicular sand using advanced " electrostatic sand planting method", make the sand uniform upright on the basal, and edge upward, directional array, high performance, chip clearance, contact surface is small, with better cutting performance. The application of this a knife cutting tool grinding processing, high production efficiency.
(3) the abrasive belt grinding contact surface friction small, less heat, can effectively reduce the deformation of the workpiece and burn, high precision machining, abrasive belt grinding is in flexible contact, and has better grinding, grinding and polishing of multiple roles, plus the grinding system of small vibration, grinding speed because of the stability of surface roughness the value of small, residual stress, the workpiece roughness of up to Ra0.40.1u m, and surface roughness of machined surface of uniform, high quality.
(4) the abrasive belt grinding can be used for planar, cylindrical, internal grinding, complex shaped surface processing. In addition to a variety of general, special equipment, the design of a belt grinding head can be conveniently arranged on the lathe and milling machine and other conventional off-the-shelf equipment, not only can make the function of machine tool expands greatly, but also can solve some difficult parts, such as the long shaft, super large plane parts, irregular surface such as precision machining, the abrasive belt grinding process flexibility, strong adaptability.
(5) applies to a wide range of abrasive belt grinding processing: almost all engineering materials, such as non-ferrous metals, non-metallic materials, material processing, have good grinding performance [10~12].
(6) the production cost is low, economic benefits is good : the abrasive belt grinding machine has the advantages of simple structure, low manufacturing cost than grinding machine; new abrasive belt adjust easily, can be positioned at one time, the replacement of several belt; it has been proved that, the abrasive belt grinding grinding ratio ( removal of the workpiece material weight and grain consumption weight ratio up to 300: 1)400: 1, and the grinding wheel is only 30:1.Ultra high speed grinding breaks through the concept of conventional grinding, can set the coarse and fine processing in one, can be achieved with cars, milling and planing cutting method is comparable to that of the metal removal rate, but also can realize the hard grinding material for high performance machining, known as the modern grinding technology summit.