花岗石锯切过程中的锯切力特征

本文通过测量和分析锯切花岗石过程中锯切力以及锯切功率，对锯片所受的单位宽度法向力Fn‘和切向力Ft‘以及单颗金刚石磨粒所平均承受的法向力和切向力进行了研究，实验过程中在保持金刚石节块表面状态基本不变的情况下，对锯切深度ap，进给速度vf和锯片圆周线速度Vs进行了较大范围的变化，另外还对锯片磨损过程中锯切力的变化进行了跟踪测量。     

锯切花岗石时金刚石节块表面温度特征分析

分析了锯切花岗石过程中的传热特点,通过理论计算得出了金刚石节块表面温度分布模型,并通过可磨削式人工热电偶测温,探讨了锯切花岗石过程中金刚石节块表面温度完布特点。     

烧结金刚石串珠绳锯切花岗石的锯切力研究

本文对烧结金刚石串珠绳在锯切花岗石过程中,锯切力及锯切后工件表面的轮廓进行了跟踪检测,研究了锯切过程中,锯切力随锯切参数的变化,以及锯切力与工件表面轮廓的相互关系。实验结果表明：锯切过程中,工件上所承受的锯切力Fh和Fv随着线速度Vs的提高而减低,随着进给速度吩的提高而增加。垂直力与水平力之间存在着良好的对应关系,垂直力与水平力比约为4．18。加工后工件轮廓偏差量随着工件所承受的垂直力的增加而增加,两者之间呈指数关系。     

金刚石圆锯节块在花岗岩锯切过程中的磨损形态及影响因素

通过单个金铡石节块磨损量和磨损表面形貌的观察和测量，分析了在不同冷却液和加工条件下的金刚石磨损形式。结果表明，金刚石的磨损形态可分为良好及微破碎、端部破碎、磨平、局部脱落、脱落凹抗和出刃。锯切节块成份和工件材料种类决定了金刚石的磨损形态和冷却液作用效果。     

花岗石锯切过程中的比能变化特征

金刚石圆盘锯已成为目前切割花岗石的最主要工具，对锯切过程进行深入地研究对于降低加工成本和提高加工效率有着非常重要的意义，能量消耗对所有加工过程都起着重要的作用，本文着重围绕在不同的加工参数下锯切花岗石时主轴电机消耗功率的变化情况，并结合比能u与单颗金刚石磨粒最大切削厚度hmax的对应关系对花岗石锯切过程中的能量特征进行量化研究。     

金刚石薄锯片高速锯切花岗石过程中的锯切力特性

本文对金刚石薄锯片高速锯切花岗石过程中的锯切力特性进行试验研究,在较宽的参数范围下,通过测量水平力、垂直力和主轴功率来计算切向力和法向力.对锯切力、力比、单颗金刚石承受的平均载荷进行了分析.结果显示,提高锯片的线速度使锯切力、力比和单颗金刚石磨粒承受平均载荷减小;在高速锯切时,锯切力随着锯切深度和进给速度的增加而增加,而进给速度对锯切力的明显影响要小于锯切深度,应选择小切深大进给的工艺参数组合;锯切力比随锯切深度的增加而增加,随进给速度的增加而减小;单颗金刚石磨粒承受平均载荷随着单颗粒金刚石最大未变形切削厚度的增大而线性增大.     

金刚石颗粒在锯切石材过程中磨损形态的研究

本文分析和归纳了锯切花岗石过程中金刚石颗粒的五种磨损形态和三个磨损阶段，探讨了金铡石颗粒磨损形态对金刚石锯片锯切性能的影响。     

金刚石绳锯的锯切轨迹及锯切机理研究

本文分析了金刚石绳锯的锯切轨迹及锯切机理，并对大理石和花岗石进行了锯切试验，以验证分析的结果。     

锯切规程对金刚石锯片胎体磨损的分析

通过对锯片胎体磨损机理的分析，本文提出了胎体的磨损与岩粉浓度成正比，给出岩粉浓度的计算公式，讨论了锯切规程的变化地岩粉浓度的定量关系，以指导锯片实际使用过程正确地选以合理锯切规程，使得胎体得到合理的磨损。     

金刚石绳锯切割混凝土的锯切力实验研究

对烧结金刚石串珠绳锯在锯切混凝土过程中锯切力的变化进行了跟踪检测实验,研究了锯切力随锯切参数及锯切长度的变化规律.实验结果表明:锯切过程中,工件上所承受的锯切力(水平力Fh和垂直力Fv)随着线速度vs的提高而减低,随着进给速度vf的提高而增加.锯切力随着锯切中工件长度L的增加而增加.垂直力与水平力之间存在着良好的对应关...     

金刚石框架锯锯切花岗岩的锯切力实验研究

本实验对金刚石框架锯锯切花岗岩过程当中的刀具轨迹进行了分析,通过单因素法和正交试验法对锯切力进行了跟踪监测,研究了锯切力随飞轮转速、进给速度和锯切长度的变化趋势。实验结果表明:金刚石锯条按弧线运动轨迹进行锯切,且在一个锯切往复周期内刀具只有一半时间参与锯切,锯切力Fh和Fc随着飞轮转速的增大而减小,随着进给速度和锯切长度的增大而增加。通过回归分析建立了锯切力数学模型,得出进给速度对Fh和Fc影响最明显,锯切长度次之,飞轮转速影响最小,并可以通过该模型在实际生产中预测锯切力的大小。     

金刚石绳锯加工弧区锯切力分布的研究

本文针对金刚石绳锯的柔性加工以及长锯切弧区的加工特点,采用弧区内分段的实验方法,在弧区七个位置选取了50 mm的微段,对每个微段进行锯切力的测量,进而总结出锯切加工弧区内锯切力的分布情况.研究结果表明:当线速度和进给速度较小时,整个弧区的锯切力的波动较小,随着线速度和进给速度的增大,弧区锯切力在整个弧区的波动随之变大;...     

Computer simulation of stone frame sawing process using diamond blades

Based on the results of scratching tests with single point tools and single segments in a previous study, the contact area between stone and blade, the number of effective cutting edges and the cutting forces per diamond grit, per segment and blade in the frame sawing process are simulated by computer. The number of diamond grits per unit area, the distribution of diamond grits per segment and the effective depth of cut of diamond grits are calculated by a new method. The Monte Carlo method is applied to generate the position of diamond grits randomly. The results show that in cutting stroke, only half of the diamond grits on the segment surface cut stone with the depth of cut increasing and a limited moving distance. The interactions of the grooves created by different segments remove the stone and generate the saw kerf. The simulation results of cutting forces are consistent in tendency with the data tested in a frame sawing machine. Cutting feed and the cutting performance of the segments are the major factors which determine the cutting forces and segment wear. The optimized constant contact area between blade and stone depends on the segment spaces, the segment number and the segment size, the ratio of the length of block and the effective cutting length of blade etc.     

Multi-wire sawing of sapphire crystals with reciprocating motion of electroplated diamond wires

This study examined the multi-wire sawing of C-plane sapphire ingots using diamond wires. Feeding new wire during the reciprocating motion of the wire was found to vary the cutting force, wafer shape, and roughness as a result of the break-in effect. The break-in and wire wear seemed to cause a gradual change in the cutting performance along the ingot position. The cutting force results indicated that an inappropriate supply of wire yielded an unbalanced force between the front and back sides of the ingot, which was caused by a difference in the cutting depth along the ingot. The results showed that controlling the wire consumption resulted in an average flatness of 16 μm, with a maximum value of 26 μm.     

金刚石框架锯锯切研究（X）-金刚石框架锯锯机与加工工艺

介绍了几种金刚石框架锯的性能参数，综述了影响金刚石框架锯锯切的主要因素，以及锯切加工工艺，包括：金刚石锯条的张紧，预调，安装，锯切参数等。为正确使用金刚石框架锯切石材提供一些基本信息。     

液体静压轴承在金刚石框架锯上的应用研究

液体静压轴承具有结构紧凑、承载能力大、运行平稳、使用寿命长、摩擦功耗小等诸多优点,在各种机械中得到广泛应用。本文通过对金刚石框架锯主要锯切运动形式分析,以金刚石框架锯锯框水平滑动机构关键件——轴向运动液体静压轴承为研究对象,结合实际建立了该轴承的结构设计模型,通过润滑机理与性能的系统分析研究,实现了对设计方案的有效验证,并满足实用要求。同时根据轴承的性能冗余,对其进一步的结构优化设计进行了研究。     

Comparison of wear characteristics of diamond segments under different sawing modes in sawing hard stone

In this study, the wear characteristics of two kinds of diamond segments with different composition of matrix were compared and investigated under two sawing modes through an experiment. Diamond particles were studied through scanning electron microscopy and three dimensional imaging system. Then, the remaining height of diamond segments was measured by digital vernier caliper. The wear characteristics of diamond segments were analyzed from wear morphology, protrusion height of diamond particles and the remaining height of diamond segments. The motion of two sawing modes and their effects on trajectories were analyzed which presented that the rocking reciprocating sawing mode can reduce sawing length and sawing time compared with horizontal reciprocating sawing mode used daily in industry. The results of experiment demonstrated that the main wear mechanism attributed to diamond segments wear is the fracture and falling of diamond particles caused by heavy loads especially in rocking reciprocating sawing mode. The average protrusion height of diamond particles is related with loads and the bonding strength of matrix. However, diamond segments wear can be effectively reduced in rocking reciprocating sawing mode while cobalt-based segments were adopted because a higher bonding strength to diamond particles can be provided compared with iron-based segments. The matrix of segments can be abrased slower while sawing length and sawing time were reduced.     

热源分布模型对花岗石锯切热量分配比例的影响研究

热量分配比例是锯切加工中的一个重要参量,其值的大小直接影响到传入单颗磨粒的热流强度,进而影响到磨粒的失效形式。以锯切加工为对象,通过花岗石锯切实验,利用热电偶和功率计分别测量温度和功率信号。采用ANSYS有限元软件,分别将基于抛物线热源分布和三角形分布的计算温度与实验测量温度进行拟合,获得弧区内热量分配比例。研究结果表明:锯切弧区的热源更接近抛物线分布,热源按抛物线分布计算的热量分配比例约为6.08%~12.21%,比热源按三角形分布的结果约小1.61%~4.07%。