【摘要】：同傳統(tǒng)金剛石圓鋸片相比，金剛石繩鋸加工具有加工效率高，使用靈活方便，對環(huán)境的影響相對較小等一系列的優(yōu)勢，屬于綠色加工。金剛石繩鋸的柔性結(jié)構(gòu)使得金剛石繩鋸在鋸切過程中會產(chǎn)生振動現(xiàn)象，但金剛石串珠繩的振動與金剛石串珠磨損之間的關(guān)系尚還沒有被研究。本文針對此問題開展了研究。 本課題利用激光位移傳感器測量金剛石串珠繩在鋸切過程中的振動信號，同時利用視頻系統(tǒng)跟蹤了金剛石串珠的磨損。首先研究了加工參量對金剛石串珠繩振動的影響，在此基礎(chǔ)是選擇了兩組振動有明顯差別的加工參數(shù)，跟蹤觀察了金剛石串珠在兩種明顯不同振動狀態(tài)下的磨損規(guī)律。得出了以下主要結(jié)論： 1、線速度對鋸切過程中的串珠繩的振動頻率有明顯的影響，鋸切過程中的一階振動主頻為串珠繩線速度與單位長度串珠個數(shù)的乘積。相比而言，進(jìn)給速度，，張緊力及導(dǎo)輪間距對鋸切過程中的串珠繩振動頻率幾乎沒有影響。 2、加工參量對串珠繩的振動幅度有明顯的影響，振動幅值隨著進(jìn)給速度和線速度以及張緊力的增大而減小，但是隨著導(dǎo)輪間距的增大而減小，其中張緊力的改變對串珠繩幅值的影響最大。 3、比較兩組不同參數(shù)下串珠繩振動隨加工過程的變化可以發(fā)現(xiàn)，串珠繩的振動頻率幾乎不隨加工過程而發(fā)生變化，但是其振動幅值會隨著加工過程的進(jìn)行而隨之增大。 4、兩組不同參數(shù)下，串珠具有大致相同的磨損規(guī)律，串珠前端的磨損會大于其中后端，而串珠表面的金剛石磨粒的出露高度大致維持穩(wěn)定，而串珠表面的金剛石磨粒的磨損狀態(tài)在經(jīng)過初期的劇烈后，也基本維持著穩(wěn)定的狀態(tài)。 5、比較兩組不同參數(shù)下的串珠繩振動與串珠磨損情況，可以發(fā)現(xiàn)串珠繩振動大，其串珠磨損也更為劇烈，串珠繩的切割壽命更少一些。
[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.
【學(xué)位授予單位】：華僑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH117

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