By comparing machine power,grinding temperature,tool surface roughness and the quality of the cutting tool edge,the influence of grinding wheel stiffness on grinding performance and quality of cutting tools was analyzed.It has been proved that,in a certain extent,the reduction of grinding wheel rigidity could improve grinding performance and quality of the tool.In addition,the rigidity improvement of grinding wheel is obvious when adding 1Ovol％ nylon,the average grinding temperature of which is 50 ℃ lower than that of common grinding wheel under the same grinding conditions.After grinding the same number of workpieces,the machining power of low rigidity grinding wheel is 30％ to 50％ that of the ordinary wheel.It is found that tool surface roughness value R a can reach lower than 0.02 μm after grinding with uniform ground surface.At a microscope of 500 times,no collapse edge defect can be seen,which means that the blade qualityis improved significantly.%通过测量不同砂轮磨削时机床功率、磨削区温度、刀具的表面粗糙度和刀口质量,分析砂轮刚性改变对砂轮磨削性能和刀具质量的影响.研究发现:在一定范围内降低砂轮的刚性可以提高砂轮的磨削性能,改善刀具的加工质量.其中,加入体积分数1o％的尼龙制备的砂轮对其刚性改善比较明显,在相同的磨削条件下,其磨削区的平均温度较普通砂轮磨削区的平均温度低50℃左右;累计磨削相同工件后,机床负载约为使用普通砂轮时的30％～50％;磨削得到的刀具表面粗糙度降低,可以达到Ra0.02 μm以下,且磨削纹路规则;在×500倍显微镜下,观察不到刀具崩刃等缺陷,刃口质量得到明显改善.
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