金刚石串珠绳锯切花岗岩的振动与磨损实验研究

发布时间：2018-12-11 20:46

【摘要】：同传统金刚石圆锯片相比，金刚石绳锯加工具有加工效率高，使用灵活方便，对环境的影响相对较小等一系列的优势，属于绿色加工。金刚石绳锯的柔性结构使得金刚石绳锯在锯切过程中会产生振动现象，但金刚石串珠绳的振动与金刚石串珠磨损之间的关系尚还没有被研究。本文针对此问题开展了研究。本课题利用激光位移传感器测量金刚石串珠绳在锯切过程中的振动信号，同时利用视频系统跟踪了金刚石串珠的磨损。首先研究了加工参量对金刚石串珠绳振动的影响，在此基础是选择了两组振动有明显差别的加工参数，跟踪观察了金刚石串珠在两种明显不同振动状态下的磨损规律。得出了以下主要结论： 1、线速度对锯切过程中的串珠绳的振动频率有明显的影响，锯切过程中的一阶振动主频为串珠绳线速度与单位长度串珠个数的乘积。相比而言，进给速度，，张紧力及导轮间距对锯切过程中的串珠绳振动频率几乎没有影响。 2、加工参量对串珠绳的振动幅度有明显的影响，振动幅值随着进给速度和线速度以及张紧力的增大而减小，但是随着导轮间距的增大而减小，其中张紧力的改变对串珠绳幅值的影响最大。 3、比较两组不同参数下串珠绳振动随加工过程的变化可以发现，串珠绳的振动频率几乎不随加工过程而发生变化，但是其振动幅值会随着加工过程的进行而随之增大。 4、两组不同参数下，串珠具有大致相同的磨损规律，串珠前端的磨损会大于其中后端，而串珠表面的金刚石磨粒的出露高度大致维持稳定，而串珠表面的金刚石磨粒的磨损状态在经过初期的剧烈后，也基本维持着稳定的状态。 5、比较两组不同参数下的串珠绳振动与串珠磨损情况，可以发现串珠绳振动大，其串珠磨损也更为剧烈，串珠绳的切割寿命更少一些。
[Abstract]:Compared with traditional diamond circular saw blade, diamond rope saw has a series of advantages, such as high processing efficiency, flexible and convenient use, relatively small impact on the environment, and so on. It belongs to green processing. The flexible structure of diamond rope saw causes the vibration of diamond rope saw in the process of sawing, but the relationship between the vibration of diamond beaded rope and the wear of diamond string has not been studied yet. This paper studies this problem. In this paper, laser displacement sensor is used to measure the vibration signal of diamond beaded rope during sawing, and the wear of diamond bead is tracked by video system. The effect of machining parameters on the vibration of diamond beaded rope is studied. On the basis of this, two groups of machining parameters with obvious difference in vibration are selected, and the wear law of diamond bead under two obviously different vibration states is observed. The main conclusions are as follows: 1. The linear velocity has an obvious effect on the vibration frequency of beaded rope in the sawing process. The main frequency of the first order vibration in the sawing process is the product of the linear velocity of the beaded rope and the number of beads per unit length. In contrast, feed speed, tension force and guide wheel spacing have little effect on the vibration frequency of beaded rope during sawing. 2. The processing parameters have obvious influence on the vibration amplitude of the beaded rope. The vibration amplitude decreases with the increase of feed speed, linear velocity and tension force, but decreases with the increase of guide wheel spacing. The change of tensioning force has the greatest influence on the amplitude of beaded rope. 3. Comparing the vibration of beaded rope with machining process, it is found that the vibration frequency of bead rope almost does not change with the machining process, but the vibration amplitude increases with the processing process. 4. Under two groups of different parameters, the wear law of the bead is approximately the same, the wear of the front end of the bead is larger than that of the back end of the bead, and the appearance height of diamond abrasive particles on the bead surface is approximately stable. The wear state of diamond abrasive particles on the bead surface is stable after the initial severe wear. 5. Comparing the vibration and wear of beaded rope with two groups of different parameters, it can be found that the vibration of beaded rope is larger, the wear of bead string is more severe, and the cutting life of beaded rope is less.
【学位授予单位】：华侨大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH117

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