CAD System of Forming Grinding Wheel for Relief Milling Cutter with High Accuracy

摘要

Relief milling cutter is a kind of special tool widely used in the milling processing of the shaped surface or the shaped groove in the mechanical industry. The operation of relief grinding is the key to manufacturing relief milling cutter with high accuracy. At present, approximate algorithms are applied to the acquirement of section of grinding wheel to manufacture its rolling ball. Then wheel's rolling ball to roll and finish forming grinding wheel and the wheel to grind the relief milling cutter in most relief grinding operations, manufacturing cost is high, the quality can't be guaranteed and the application of this kind of cutter is limited in the complicated process. Another factor of influencing the tool's performance is the shape of the teeth back curve. According to the theoretical analysis and research, the best shape for the teeth back curve of the relief milling cutter is Logarithm Spiral Curve. This paper discusses the relationship among the profile of work-piece, profile of cutter and section of grinding wheel. On the basis of researches into the input method of work-piece's profile, the design method of milling cutter profile and the calculating method of section of the grinding wheel, the CAD system of forming grinding wheel section for relief grinding is developed to accomplish the design of shaped wheel's profile automatically, which improves the quality and efficiency of design and lays down a foundation for the CAD/CAM repairing system of forming grinding wheel and the CAD/CAM unity of the relief milling cutter.