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Study on High Efficiency Deep Grinding Force of S45C Steel

S45C steel is one of the most widely used metal materials. It has low hardness and is easy to be machined. It has high hardness and good comprehensive mechanical properties after heat treatment. It is used in various important structural parts and shaft parts.
When the grinding wheel rotates at high speed, gas barrier will be formed around the grinding wheel, which makes it difficult for the coolant to enter the grinding process. Therefore, the following special liquid supply methods must be adopted, such as setting the air baffle, high pressure spraying method, cold hair in the grinding wheel and self-acceleration method, etc. When the feed speed of the S45C steel workpiece is 2m/min, the normal grinding force and the tangential grinding force increase correspondingly with the increase of the grinding depth, because the other grinding parameters are constant. In the same case, the grinding depth is increased, and the maximum undeformed chip thickness of the single abrasive grain is increased, and the number of effective abrasive grains involved in the grinding is increased, resulting in a large grinding force. In addition, as the grinding depth increases, the frictional effect between the grinding wheel binder, the grinding debris and the workpiece to be ground increases during the grinding process, so the grinding force also increases. It has been further found that as the linear speed of the grinding wheel increases, the grinding force is significantly weakened with the increasing tendency of the grinding depth. It is not difficult to conclude that when S45C steel metal material is used for large grinding with high grinding wheel speed, deep grinding is very advantageous. At this time, the grinding force is not increased significantly, but stabilized with the grinding wheel speed increasing.
Under the condition of high-efficiency deep grinding, increasing the linear speed of the grinding wheel will reduce the grinding force and improve the grinding conditions. Increasing the depth of the grinding will increase the grinding force significantly, but it will decrease specific grinding energy. The specific grinding energy decreases with the increase of the grinding depth, and also decreases with the increase of the workpiece feeding speed, and the increase of the grinding wheel linear speed has little effect on the grinding energy. This shows that when the grinding depth is large, increasing the linear speed of the grinding wheel and increasing the feed rate of the workpiece will not cause the grinding condition to continue to deteriorate, but the machining efficiency can be greatly improved under the premise of ensuring the processing quality. In summary, it is feasible to apply high-efficiency deep-grinding processing to the processing of ordinary metal materials, and to improve the processing efficiency and reduce the processing cost, and to obtain better surface quality.

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