金刚石框架锯锯切研究(Ⅷ) --计算机模拟框架锯锯切过程

计算机模拟了在框架锯锯切过程中石材和锯片的接触面积和有效切削刃数、单个金刚石颗粒、金刚石结块和整个金刚石锯条的切削力。结果表明：在结块表面上出刃的金刚石颗粒中，只有半数金刚石颗粒在一个固定的切削区间内切削石材。金刚石在不同位置切削产生的断裂沟槽交错，形成了锯切沟槽的底部，切削力的试验结果与实际切削试验结果在数量级和变化趋势上是一致的。切削进给量和金刚石结块的切削性能是影响切削力和结块磨损的主要因素。石材和锯条结块间的最佳接触面积取决于结块间距、结块数目、结块尺寸，以及石材的长度与锯条有效切削长度之比等因素。

STUDY ON THE FRAME SAWING WITH DIAMOND BLADES(REPORT Ⅷ)-- ANALYSIS OF FRAME SAWING PROCESS SIMULATION BY COMPUTER

A software package was developed to simulate the parameters of frame sawing of stone such as: effective cutting edges of segments, contact area between stone and blade, cutting forces per diamond grit, per segment and blade ,as well as the moving traces of segments on the stone surface. The results indicated that, in each cutting stroke, only half of the diamond grits participate in the cutting. The cross structure created by diamond grit in different position of segments are replicated on the bottom surface of the cut on the stone, which is nearly flat in the middle and uneven at the ends. The simulated date of cutting forces are in conformity with the measured value in the same changing tendency and on the same level. The cutting feed and the cutting performance of the segments are the main factors to determine the cutting forces and the segment wear. The optimal contact area between the blade and stone depends on the segment space, segment number and dimenstion, the ratio of the stone length and the effective length of the saw blade.