Torsional vibration of a moving band

Alspaugh, Dale W.

doi:10.1016/0016-0032(67)90047-6

Cited by 19 publications

(9 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The latter group is widely used because of the possibility of process automation, small kerf losses, straightness of the kerf, good surface quality, as well as long saw blade life [ 1 ]. Cutting with band saw blades is characterized by the fact that the thicknesses of the cut layers are small, the nature of the cutting edges work is intermittent [ 2 ], the number of cutting edges in contact with the workpiece can change, and the saw blade itself is an object of low own stiffness [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

A Critical Reanalysis of Uncontrollable Washboarding Phenomenon in Metal Band Sawing

et al. 2020

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

A Critical Reanalysis of Uncontrollable Washboarding Phenomenon in Metal Band Sawing

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In band sawing, the negative impact of chatter on the quality of products was first noticed in lumber cutting [10] and [11], and was reflected in the so-called wash-boarding [10] of the cut surface. To be able to understand, predict and avoid chatter vibrations in band sawing, several mathematical models were derived.…”

Section: Introductionmentioning

confidence: 99%

“…Their aim was to predict the natural frequencies of the moving continuum, representing the band saw blade. In order to predict the natural frequencies, which are related to the chatter phenomenon, models based on bending [10] and torsional deformations [11] were developed, as well as several models that were based on a moving plate with respect to tangential loading [12], parametric excitation [13], and non-conservative force excitation [14]. Experimental studies of the band saw blade vibrations showed that tensioning of the blade increases the fundamental torsional frequency, but does not affect the lateral bending frequency [15].…”

Section: Introductionmentioning

confidence: 99%

Experimental Chatter Characterization in Metal Band Sawing

Thaler¹,

Potočnik

Kopač

et al. 2014

SV-JME

View full text Add to dashboard Cite

In this paper, the influence of the cutting speed and of the distance between the blade supports on chatter phenomena is investigated. For this purpose a series of experiments with triangular cutting speed variation at several pre-selected distances between the blade supports was conducted on structural steel (St37, DIN 17100) workpieces. A feature for chatter detection was extracted from the power spectra of the machine vibration signal, and a set of characteristics was introduced for experimental chatter characterization. The results showed the presence of a chatter hysteresis which depended on the cutting speed. Additionally, apart from the blade support distance, the cutting speed was shown to be a strongly influencing parameter, and as such also promising for chatter control in band sawing processes.

show abstract

“…In band sawing, the negative impact of chatter was first noticed in lumber cutting [7,8], and was reflected in the so-called wash-boarding [9] of the cut surface. To understand, predict and avoid chatter vibration in band sawing, several mathematical models were derived in order to predict the natural frequencies of the moving continuum representing a band saw blade [7,8,10].…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization of Chatter in Band Sawing

Thaler¹,

Potočnik

Govekar

2013

Lecture Notes in Mechanical Engineering

View full text Add to dashboard Cite

In the paper the results of the characterization of the chatter phenomenon in the band sawing process are presented. In particular, the influence of the cutting speed and of the distance between the cutting blade supports on chatter characteristics was investigated. In addition to the cutting forces, and emitted sound, the machine vibrations described by the measured acceleration signals were used to characterize the chatter. Based on an analysis of these signals, a hysteresis of the chatter onset and chatter die out cutting speeds was observed. The observed cutting speed hysteresis indicates that the chatter onset in band sawing is caused by a Hopf-like bifurcation, and that cutting speed is a promising parameter for chatter control. Additionally, the strong effect on chatter characteristics of the distance between the cutting blade supports was experimentally confirmed.

show abstract

Torsional vibration of a moving band

Cited by 19 publications

References 3 publications

A Critical Reanalysis of Uncontrollable Washboarding Phenomenon in Metal Band Sawing

A Critical Reanalysis of Uncontrollable Washboarding Phenomenon in Metal Band Sawing

Experimental Chatter Characterization in Metal Band Sawing

Experimental Characterization of Chatter in Band Sawing

Contact Info

Product

Resources

About