Usage precautions of PCD tool grinder
1.PCD tool grinder when grinding the tool, it is necessary to control the pressure of the grinding wheel. The tool is re-grinded. If the tool edge is eccentric due to uneven pressure, the sharpness of each part of the blade edge is different. Otherwise, the blade oscillates. There may protrusions in the blade. When the pressure of the grinding wheel during the whole grinding process is too large, the blade is easily annealed due to high temperature. And even the high temperature is softened and deformed by the pressure, thereby greatly reducing the service life of the blade. When the pressure of the grinding wheel is too small, it can not guarantee the smooth fit of the grinding wheel and the cutting edge. And it is easy to excessively grind the partial area to cause unevenness, the cutting edge of the cutting edge and the middle part have protrusions.
2. The grinding speed of the blade part should not too fast, otherwise the abrasive will easily squeeze and rotated at high speed to scrape off. It can not play the lubrication effect in the grinding process. The sharp tooth is easy to be broken, and the original blade is processed. The average state during the process is also destroyed, resulting in uneven grinding. It should not too slow, otherwise, the blade and the grinding wheel will be severely worn due to the resistance factor. Causing the temperature to too high and annealing.
3. Large must grind medium and large tools. If the stroke is not enough, the tool can't get full reciprocating grinding. Secondly, for small cutters, the suction of the electromagnetic chuck is not enough. The effect is not as good as the traditional fixed fixture, and the middle part of the cutter head will receive the short stroke processing effect. After repeated use, it will cause collapse and affect the service life of the cutter head. Therefore, it is necessary to grind the large cutter and have enough grinding stroke. This type of sharpener is recommended only.
4. The same knife cannot unilaterally hope that its precision is higher. And the amount of feed per time is reduced from the original amount to the small amount so that the tool continuity is in the high temperature of the grinding process. Annealing and the problem of deformation is easy to happen.
Installation impact of 2-axis CBN grinding machine
1. The existing 2-axis CBN grinding machine transmission structure is a traditional mechanical transmission structure, which is connected by a V-belt to drive the power. Therefore, a high matching is required in the selection and matching requirements of the V-belt and the pulley. Standard, in addition, the installed V-belt needs to pay attention to moderate adjustment. The appropriate V-belt can not only have a long service life but also ensure that the sharp-knife achieves the best matching speed. Which is caused by the transmission factor. The low speed is easy to have a negligible effect on the grinding accuracy.
2. 2-axis CBN grinding machine the plane in which the sharpening wheel is placed must level with the ground. Due to the influence of gravity, even if the fuselage can provide perfect support, as long as the plane of the sharpening wheel can not be level with the ground. The tool will difficult to sharpen. In reality, it is impossible to guarantee that the floor of each customer's factory is level. If there is a little arc, the parallel state of the grinding wheel and the ground cannot guarantee. For this reason, our company independently develops the horizontal grounding adjustment device of the fuselage. Which can use for customers. When the factory's ground parallelism is insufficient, adjustments are made to ensure the level of the fuselage. Thus ensuring the precision of grinding.
3. The matching structure of the components of the sharpener is stable. The sharpening machine for precision grinding must ensure the compact fit of its own components. Any looseness of the wire may cause the beating or rocking during the grinding process. And all the sharpeners that can achieve the precision machining effect. The fastening connectors must firmly connect to provide a smooth-running environment, otherwise, the uneven grinding and serrated edges may occur.
4. Grinding wheel and cutter height adjustment. According to the actual investigation and inspection structure of our company, the optimal distance between the body of the sharpening part and the plane on the cutter head is 5.8mm-6.3mm. And the center must in the same vertical plane as the center point of the cutter head, and the length of the boom It must also control within the precise optimum length range. Otherwise, it will easily affect the sharpening stroke, resulting in deviation of the grinding position of the blade and insufficient sharpness.
Grinding process of CBN grinding machine
Part of the CBN grinding machine is different from the conventional one. In addition to providing cooling liquid for cooling, it is also necessary to mix abrasive particles such as silicon carbide in the cooling liquid. The micro-abrasive particles can enhance the effect of tool grinding and enhance the continuous availability of the tool. However, the amount of such abrasive particles must controll within an appropriate range. Otherwise, if the quantity is too large, the knife edge will produce a thick layer of sand. Which will not only make the tool sharp and sharp but will prone to wear. If the amount is too small, the polishing time is prolonged, and it is easy to cause deformation due to annealing.
