The grinding tool, especially the grinding tool groove, adopts the strong grinding technology, the grinding force is large, the elastic deformation of the tool is large, and there will be many problems in the process of processing. Such as tool groove asymmetry, tool outer circle size, edge parameters, shape error does not meet the requirements, serious even lead to the tool is broken. The following is a simple analysis of the accuracy of the tool when the machine tool is machining the slender rod type tool.
The influence of machining machine tools on the precision of cutting tools
When making any cutting tool, the precision of the machine tool is the key to determine the precision of the cutting tool, slender rod type cutting tool is no exception. The two sand wheel shafts of the machine tool are arranged longitudinally. When machining different parts of the cutter, not only different grinding wheels but also different sand wheel shafts can be selected. The repetition precision of the two shafts is very high, which can fully meet the precision requirements of the long and thin rod cutting tools.
The influence of grinding wheel on tool accuracy
All parameters of the tool are determined by the relative movement of the grinding wheel and the tool. Therefore, the diameter of the grinding wheel, the Angle at which the grinding wheel directly participates in the cutting, the flange length of the grinding wheel shaft, the wear of the grinding wheel and the grain size of the grinding wheel all affect the precision of the cutting tool.
Inaccurate measurement of grinding wheel diameter may indeed cause: the size of the outer circle of the cutter does not conform to the requirements; The width of the blade is inconsistent with the requirements; The shape and depth of the tool groove do not meet the requirements; The step part of the step drill cannot be rooted or rooted too deeply.
The grinding wheel Angle measurement or input is not accurate may cause: the width of the blade blade belt is not consistent with the requirements; Step surface Angle of step cutting tool does not meet the requirements; Error in position or Angle of tool back Angle; The groove Angle of the chip discharge groove is wrong. If the measurement of the flange distance of the grinding wheel is not accurate, the grinding point that the grinding wheel actually participates in grinding will change, and the above problems will also occur.
The grinding wheel will wear a certain amount after a certain period of use. When the worn wheel is used for grinding, the actual grinding point of the grinding wheel has been changed, which will directly affect the geometric accuracy of the tool, so that the width of the blade and band of the tool, the shape and depth of the tool groove, the step Angle of the step surface, the root removal of the step part and the position of the tool back surface do not meet the requirements.
The particle size of grinding wheel has a direct effect on the surface roughness of cutting tool. The grinding wheel with larger and harder particle size is beneficial to improve the surface roughness of the cutting tool because of the one-time clamping grinding and the same grinding wheel used for coarse and fine grinding.
The influence of cooling system on the accuracy of the tool
The cooling effect of the coolant on the grinding zone will directly affect the precision of the cutting tool. Choosing the coolant with good performance and proper cooling pressure is beneficial to the coolant entering the grinding zone, taking away the cutting heat and chip in time, and effectively reducing the surface roughness of the tool.