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用常规刀具磨损、耐用度试验法建立刀具耐用度t与切削用量(切削速度V、进给量f、切削深度ap)关系式(广义Taylor公式)不仅耗资费时,而且不能反映刀具主偏角K_r,刀尖圆弧半径rε等因素对耐用度的影响。本文引入了等效切削厚度a_(ep)的概念;推导了a_(ep)的计算公式;建立了耐用度与切削速度、等效切削厚度的数学模型,并通过切削试验建立了硬质合金刀片切削高强度钢的t—v、a_(ep)关系式。研究结果表明,t—v、a_(ep)关系式综合地反映了v、f、Ap、k_r、rε、等因素对t的影响,从内容上对广义Taylor公式进行了扩充,而在形式上进行了简化,从而节省了试验材料和试验时间。是一种快速的刀具磨损,耐用度试验方法。所得到的t—v、a_(ep)关系式定量地反映了v、f、AP、kr、rε对t的影响,将为切削用量及刀具几何参数的优化提供重要依据。
With the conventional tool wear and durability test method to establish tool durability t and cutting the amount of (cutting speed V, feed f, depth of cut ap) relationship (generalized Taylor formula) not only costly, but also can not reflect the tool corner angle K_r , Tip arc radius rε and other factors on the durability. In this paper, the concept of a_ (ep) equivalent cutting thickness is introduced; the formula of a_ (ep) is deduced; the mathematical model of durability and cutting speed and equivalent cutting thickness is established, and a carbide cutting blade Cutting t-v, a ep relationship of high strength steel. The results show that the relation of t-v, a-ep reflects the influence of v, f, Ap, k_r, rε and other factors on t, and extends the generalized Taylor formula from the content. Has been simplified, thus saving test materials and test time. Is a fast tool wear, durability test method. The obtained t-v, ep relationship quantitatively reflects the influence of v, f, AP, kr, rε on t, which will provide an important basis for the optimization of cutting load and tool geometrical parameters.