Choosing The Right Grinding Wheel(4)
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- Category: Manuscripts - How to Choose Grinding Wheels
Choosing The Right Grinding Wheel(4)
By the grinding wheel with a sudden a lot of small margin of edges and corners or mineral crystal particles bonded with cement together to form. Particles than the grinding wheel was higher hardness and cutting tools, but also have sufficient strength and toughness, resistance to impact. These particles have been crushed by the abrasive.
Abrasive points abrasive man-made and natural abrasives are used there is a natural abrasive corundum, the Steel. There are ordinary alumina abrasive man-made, white alumina, silicon carbide black, green silicon carbide, and so on. Size of the abrasive particles known as the Grinding wheel size.
Grinding Wheel particles on the surface at work because of friction with each other and cutting tools, wear and tear will gradually become blunt, when the grinding resistance beyond the bond between the particles and bonding force, the particles started falling, and was replaced by a new sharp particles. Therefore, automatic grinding wheel with a sharp performance. But the combination of bonding agent is also not too strong, too, such as solid particles become attached to the blunt after the surface grinding wheel, grinding wheel will lose the role. In addition, due to the grinding wheel and workpiece to be friction will have a great heat, combine easily be softening agent. By the end of the grinding of metal material and adhesive binders full of sand in between the cracks, the wheel will plug it. If this side is to continue the work of grinding wheel is not only a very low work efficiency, grinding and cutting tools were also caused by annealing will become blue. On the other hand, if the bond can not be firmly bonded particles, the particles have not changed in the net between the grinding will also make it off, so wear sand transmission line quickly, easily deformed, requiring constant repair.
Every time when the grinding trip was Moqu thickness, with different materials, different grinding capacity for carbon steel is about 0.012 to 0.015 mm, the steel is about 0.01 to 0.02 mm.
Grinding Wheel used in three binders: ceramic binder, rubber binders, resin binder.
Grinding Wheel cooling
Grinding Wheel during working hours, work should be carried out to cool, especially the plane iron grinding, milling cutter, drill, in order to prevent the annealing and cutting tools. At present, China's lively production of Grinding Machine, with automatic control of liquid cooling pumps. Sharpen the saw blade, saw blade in general do not have time to cool. Grinding Machine is no cooling equipment, wheel drive should prepare a bucket or pool.
Bond bonding capacity of particles called Wheel hardness. If the binder particles are bonded tightly, it would be hard-grinding wheel, combined with particles bonding agent is not soft on the wheel too tightly. Determination of hardness wheel can be used for certain equipment. However, according to the sand sound transmission line can be roughly determined. When we use lightly metal Each wheel is on the towel labels indicate manufacturing brands, abrasive, particle size, binders, hardness, size specifications, the speed of work, manufacturing date and so on. Under normal circumstances, marked only factory brand, size, hardness and speed. We can wheel performance, combined with the need for choice.
Grinding with the thickness and amount of surface grinding wheel size and speed of the relevant circular. To a certain feed rate, the smaller the surface grinding, grinding the greater thickness; the greater surface grinding, grinding thickness can be less. Are the same size and quality of the grinding wheel, grinding traffic circle, the faster the greater the contrary, if the circumference of slow, grinding thickness of less.
When the same wheel speed, large-diameter wheel in a certain period of time, grinding a long journey, the thickness of the large grinding. Direct Mody small wheel, grinding a short trip, the grinding on the thickness of the small. For example, the use of vertical devices automatically send Grinding Machine Tool, the new film will be grinding wheel, grinding may be due to the large thickness, the amount of horizontal feed can be bigger, less able to travel again, after grinding wheel gradually reduce the wear and tear, grinding Less, so the horizontal feed the appropriate amount to more small and repeated trips to be more appropriate.
Grinding Wheel selection, should be processed in accordance with the nature of the pieces of material, in general, the tensile strength of the small, fragile materials such as the large cast iron, bronze, and so on, should be understanding and silicon carbide abrasive wheel; tensile strength, toughness large material, such as Carbon steel, alloy steel, high-speed steel, and so on, should alumina abrasive wheel. Because the brittle silicon carbide abrasive, if used to wear big tensile strength materials, abrasive easily broken following the loss. Alumina abrasive brittle relatively small, but not as sharp silicon carbide, the hardness will be lower, if it is used to mill small tensile strength materials are inappropriate for large fragility.