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Performance investigation of traditional diamond frame saw in processing granite
International Journal of Refractory Metals & Hard Materials ( IF 3.6 ) Pub Date : 2021-06-11 , DOI: 10.1016/j.ijrmhm.2021.105601
Peiyu Dong , Jinsheng Zhang , Junjie Wu , Jingkun Wang

The kinematics characteristics of the traditional diamond frame saw were analyzed theoretically, and the prediction model of average chip thickness was established in this research. Sawing forces tests and sawing experiments were accomplished to investigate the sawing performance of the traditional horizontal frame saw and explore the instability mechanism of the sawblade in processing two varieties of granite. The results proved that most segments welded on sawblade surface kept synchronous and continuous contact with the stone block during sawing with traditional horizontal saw. The value of sawing force was positive correlation versus the feed velocity and sawing length, negative correlation versus the spindle speed, and also associated with the properties of stone materials. Only a few matrix trails were developed in the left and right ends of segment, and the matrix bond was dominated by severe abrasive. The diamond worn appearance varied greatly in different regions on segment surface, in which higher proportion of blunt and pull-out diamond particles were exhibited in the middle of segment, and the proportion of fractured particles increased in the left and right ends of segment. A long contact arc and continuous long and thin chips were maintained during the traditional frame sawing with the horizontal reciprocating linear motion of the sawblade, which led to larger sawing forces and instability of the sawblade, thus reducing the sawn slabs flatness.



中文翻译:

传统金刚石框锯加工花岗岩的性能研究

本研究从理论上分析了传统金刚石框架锯的运动学特性,建立了平均切屑厚度预测模型。通过锯切力测试和锯切实验,研究了传统水平框架锯的锯切性能,探索了锯片在加工两种花岗岩时的失稳机理。结果证明,在传统水平锯的锯切过程中,大部分焊接在锯片表面的锯片与石块保持同步连续接触。锯切力的大小与进给速度和锯切长度呈正相关,与主轴转速呈负相关,还与石材的性质有关。管片左右两端仅发育少量基体痕迹,基体结合剂以强磨粒为主。节段表面不同区域的金刚石磨损外观差异较大,其中节段中部钝化和拉出金刚石颗粒比例较高,节段左右两端断裂颗粒比例增加。传统的框锯由于锯片的水平往复直线运动,保持了较长的接触弧和连续的细长切屑,导致锯片的锯切力较大,锯片不稳,从而降低了锯切板的平整度。其中节段中部钝头和拉出金刚石颗粒比例较高,节段左右两端断裂颗粒比例增加。传统的框锯由于锯片的水平往复直线运动,保持了较长的接触弧和连续的细长切屑,导致锯片的锯切力较大,锯片不稳,从而降低了锯切板的平整度。其中节段中部钝头和拉出金刚石颗粒比例较高,节段左右两端断裂颗粒比例增加。传统的框锯由于锯片的水平往复直线运动,保持了较长的接触弧和连续的细长切屑,导致锯片的锯切力较大,锯片不稳,从而降低了锯切板的平整度。

更新日期:2021-06-15
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