How to sharpen the cut of the lathe
The blade of a lathe 1, sharpen the back of the knife, and grind out the main Angle and the rear Angle. 2, grind the side of the side of the knife, and grind out the side Angle and the rear Angle. 3, sharpen the front, and sharpen the front Angle. Sharpen the blade and tip.
hardness The hardness of the grinding wheel is to reflect the degree of difficulty of the grinding force of grinding grain on the surface of the grinding wheel. The grinding wheel is hard, the surface grinding grain is hard to fall off; The grinding wheel is soft, indicating that the grinding grain is easy to fall off. The hardness of the grinding wheel and the hardness of grinding grain are two different concepts. A soft or medium grinding wheel should be chosen for the edge of a high speed steel tool and a hard alloy turning tool. In addition, the combination and tissue of grinding wheel should be considered when choosing grinding wheels. The ships and factories are generally used for the use of ceramic binding agents (code A) and medium-sized grinding wheels. Above all, we should choose the grinding wheel properly according to the tool material. When grinding high speed steel tool, use the soft or medium alumina grinding wheel, which is size 46 to 60. In the case of a carbide turning tool, you should choose a soft or medium silicon carbide grinding wheel with a size of 60 to 80, which can not be mistaken.
Particle size The granularity indicates the degree of grinding grain size. The number of holes per inch is used to represent the number of holes in the ground. For example, the "60 granularity" means that the abrasive particle has a mesh of 60 holes in the length of each inch. Therefore, the larger the number, the finer the grinding grain. A rough grinding knife should be used to grind a small grinding wheel, and the grinding wheel should be chosen for a large number of grinding wheels. The ship's usual size is 46 - the medium or hard wheel of the platform 0.
abrasive The commonly used abrasive materials are oxide, carbide and high hard abrasive. The ships and factories are commonly used in aluminum oxide and silicon carbide grinding wheels. The grinding grain of alumina grinding grain is low (HV2000 - HV2400), the toughness is big, the blade grinds the high speed steel tool, the white is called the white corundum, the taupe is called the brown corundum. The grinding of silicon carbide grinding wheel is higher than that of aluminum oxide grinding wheel (hv2,800). It is brittle and sharp, and has good thermal conductivity and electrical conductivity. Black and green silicon carbide wheels are commonly used. And the green silicon carbide wheel is more suitable for the sharpening carbide turning tool.
The position and method of sharpening the tool People stand on the side of the grinder to prevent debris from hurtful when the grinding wheel breaks. 2, the distance between the two hands is relaxed, the two elbows tighten the waist, in order to reduce the shaking of the sharpener. 3, grinding, turning to on the plane of grinding wheel center, a turned-up nose about 3 ° ~ 8 °, after turning tool grinding wheel contact should be done about the horizontal direction of movement. When the tool leaves the wheel, the knife must be lifted up to prevent the blade from being hurt by the grinding wheel. 4, in the face of the machete, the tail of the dao is left over the Angle of the main Angle. When the side of the knife is worn, the end of the pole is angled to the right. When grinding the tip of a knife, it is usually used to hold the front of the turning point with the left hand and turn the back of the tool with the right hand.
