Experimental Chatter Characterization in Metal Band Sawing

Thaler, Tilen; Potočnik, Primož; Kopač, Janez; Govekar, Edvard

doi:10.5545/sv-jme.2013.1515

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…The vibration signal was collected in the time domain for all directions. The frequency spectrum analysis method was applied to characterize the acceleration signal in the frequency domain [16]. The frequency spectrum of the vibration signal of idling test and actual process is shown in Fig.…”

Section: Vibration Characteristics Of Machine Toolsmentioning

confidence: 99%

Experimental Analysis of Process Parameter Effects on Vibrations in the High-Speed Grinding of a Camshaft

Liu

Deng

et al. 2020

SV-JME

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The capacity to minimize vibrations in grinding by the selection of appropriate process parameters is a significant benefit in the process optimization of cam grinding. This paper presents survey methods to characterize and quantify the vibrations and waviness in a camshaft grinding application. First, a modal analysis was conducted to study the dynamic characteristic of a camshaft grinding machine. Then, developed methods were applied to study the influences of various parameters on vibrations in the high-speed grinding of a camshaft. Furthermore, the influence of each grinding process condition on surface waviness in high-speed camshaft grinding was studied. The results show that the vibrations and the surface waviness change with the increase of grinding depth, and an appropriate grinding wheel speed combined with a workpiece speed has, for most grinding conditions, a reducing effect on vibration magnitudes and waviness. Finally, the specific indications about the optimal grinding process parameters in terms of dynamic characteristics of the grinding machine were given, and the speed ratio=1.2 is a novel choice.

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Section: Vibration Characteristics Of Machine Toolsmentioning

confidence: 99%

Experimental Analysis of Process Parameter Effects on Vibrations in the High-Speed Grinding of a Camshaft

Liu

Deng

et al. 2020

SV-JME

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“…In recent years, a number of papers analyzed the problems of loss of stability in the cutting process of band saws where the authors Used signals of sound pressure, vibrations and cutting forces for the proprietary method of detecting chatter vibrations, which in this case were independent of the workpiece geometry and cutting parameters [ 6 , 7 ]; Developed a model in which the free length of the saw blade, cutting speed, and feed speed were taken into account to determine stability regions, which avoid the presence of chatter vibrations when cutting [ 8 ]. Two strategies have been proposed to avoid this type of phenomenon, the first of which is to reduce and the second to increase the cutting speed to find working parameters outside the area where there would be a risk of loss of stability [ 8 , 9 ]. …”

Section: Introductionmentioning

confidence: 99%

“…Developed a model in which the free length of the saw blade, cutting speed, and feed speed were taken into account to determine stability regions, which avoid the presence of chatter vibrations when cutting [ 8 ]. Two strategies have been proposed to avoid this type of phenomenon, the first of which is to reduce and the second to increase the cutting speed to find working parameters outside the area where there would be a risk of loss of stability [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

A Critical Reanalysis of Uncontrollable Washboarding Phenomenon in Metal Band Sawing

et al. 2020

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The article analyzes the cutting process of hard bars. Investigations conducted in industrial conditions demonstrated the presence of surface errors in the machined workpieces in the form of washboard patterns. The purpose of this study was to analyze the results of cutting on band sawing machines with different band saw blades. The cutting processes were conducted on three different horizontal band sawing machine types. Analyzed material was an alloy steel Ø40 mm rod with a hardened surface covered with a thin layer of chromium. The hardness of the outer layer was 547 HV with a core hardness of 180 HV. The surface topography measurements of the processed workpieces were carried out with the 3D Optical Profiler, which supplied information on the irregularities of the processed material texture. In each of the analyzed cases, a corrugated surface was obtained after sawing, which is the effect of the occurrence of the washboarding phenomenon, despite the fact that the teeth of each band saw had variable pitches. The washboarding phenomenon when cutting rods with hard surfaces is caused by the phenomenon of wave regeneration. Despite the use of variable pitch saw blades, the cutting process results in rippling of the sawn surface, which is caused by the high hardness of the outer layer of the workpiece, as well as by the type of tool with spring setting of teeth.

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“…Bir başka çalışmada, Attanasio (2008) İmalat endüstrisinde yüksek verimlilik için, kesici takımların kesme performanslarına ve buna bağlı olarak iyi bir takım ömrüne gereksinim duyulmaktadır (Rao et. al 2012) (Thaler et. al 2014).…”

Section: Introductionunclassified

Investigation of Tool Performance in Cutting Process of AISI 1020 Material by Using Band Saw

Yılmaz¹,

Ucun²

2014

AKU-J. Sci. Eng.

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ÖzetLamalı testerelerin kesme performansı iyi bir imalat süreci için önemlidir. Kesme performansını kuvvetler, güç tüketimi, enerji ve hasarlar gibi bazı faktörler belirlemektedir. Bununla birlikte verimli bir kesme işlemi için kesme performansını belirleyen bu faktörlerin bilinmesi gerekmektedir. Bu çalışmada, imalat endüstrisinde genişçe kullanılan lama testere ile AISI 1020 malzemesinin kesilmesi işleminde takım performansı incelenmiştir. Deneylerde bilgisayar kontrollü bir kesme makinesi kullanılmıştır. Lama testerenin kesme performansının belirlenmesi için ilerleme ve kesme hızı sabit parametreler olarak seçilmiştir. Bu parametrelerde toplam 80 deney yapılmıştır. Deneylerde soğutma sıvısı olarak bor yağı kullanılmıştır. Kesme kuvvetleri üç yönlü dinamometre, güç tüketimi ise enerji analizörüyle ölçülmüştür. Kesme işleminde oluşan mikro kırıklar taramalı elektron mikroskobunda (SEM) incelenmiştir. Çalışma sonucunda, güç tüketimi ve kesme kuvvetlerinin belirli bir deney sayısına kadar arttığı ve ondan sonra bir miktar azaldığı belirlenmiştir. Bu sonuç diş kırılmaları sonuçları ile doğru orantılı olarak elde edilmiştir. Investigation of Tool Performance in Cutting Process of AISI 1020 Material by Using Band SawKeywords Band Saw; Cutting Forces; Power Consumption; Tooth Fracture. AbstractCutting performance of band saws is very important to a good manufacturing process. Some factors such as forces, power consumption, energy and failures determines to the cutting performance. In addition, these factors in determination of the cutting performance must be known for an efficient cutting process. In this study, the tool performance in cutting process of AISI 1020 material with band blade variety used in manufacturing industry has been investigated. A computer controlled machine was used in the experiments. Constant parameters such as feed rate and cutting speed were preferred for determination of the performance of the band blade. Total 80 experiments were made in these parameters. Boron oil was utilized as coolant liquids in the experiments. The cutting forces were measured by using three dimensional dynamometer and the power consumption was also determined by energy analyzer. Micro fractures occurred the cutting process were analyzed scanning electron microscopy (SEM). In the study results, the power consumption and the cutting forces increase till a certain number of the experiments, then it decrease. This result obtain as consistent with the tooth fractures.

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Experimental Chatter Characterization in Metal Band Sawing

Cited by 7 publications

References 19 publications

Experimental Analysis of Process Parameter Effects on Vibrations in the High-Speed Grinding of a Camshaft

Experimental Analysis of Process Parameter Effects on Vibrations in the High-Speed Grinding of a Camshaft

A Critical Reanalysis of Uncontrollable Washboarding Phenomenon in Metal Band Sawing

Investigation of Tool Performance in Cutting Process of AISI 1020 Material by Using Band Saw

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