Effect of misalignment on the cutting force signature in drilling

Al-Hamdan, A.

doi:10.1016/s0924-0136(02)00051-1

Cited by 8 publications

(8 citation statements)

References 4 publications

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“…In deep hole drilling the combination of chip removal, lubrication and localization of the thermomechanical loading in a confined cutting zone has a direct impact on the tool life and machining performances [2]. The main treated problems in scientific works concern the role of guide pads [1,[3][4][5][6][7][8][9][10][11][12][13], the dynamic phenomena occurring during the machining [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] and the chip formation process [25,29].…”

Section: Introductionmentioning

confidence: 99%

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Experimental and analytical analyses of the cutting process in the deep hole drilling with BTA (Boring Trepanning Association) system

Thil

Haddag

Nouari

et al. 2013

Mechanics & Industry

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-This paper deals with analysis of the cutting process, on a macro and micro scale, in the deep hole drilling with BTA system. An experimental procedure is developed to highlight the impact of cutting speed and feed rate on the cutting process when machining the 18MND5 steel. Parameters based on dimensional characteristics of chips are introduced to quantify the morphology of chips generated by central, intermediate and external inserts of the complex BTA drilling tool. From observation of the chips morphology (flat, curved and spiral) and the measurement of the chips width, the provenance of each chip with respect to cutting inserts is identified. Then, the Chip Compression Ratio is evaluated for each cutting condition, indicating the amount of plastic strain in chips. Thanks to the introduction of a new parameter, denoted as Chip Fragmentation Ratio, it is found that the cutting speed has a little influence, compared to the feed rate, on the chips size. Based on this quantitative analysis, the optimal range of cutting conditions for the BTA deep hole drilling is discussed. It is mentioned that although increasing the feed rate promotes the chips fragmentation and increases the material removal rate (increasing productivity), an upper limit is to determine to prevent excessive flank wear. Also, the cutting speed should be limited to avoid excessive crater wear.

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Section: Introductionmentioning

confidence: 99%

“…The impact of coaxially between the BTA drilling tool and the machined hole on the cutting forces fluctuation has been treated in [14,15]. In [13,16], the effect of the dynamic instability of the BTA drilling tool on the circularity of the hole has been studied.…”

Section: Introductionmentioning

confidence: 99%

Experimental and analytical analyses of the cutting process in the deep hole drilling with BTA (Boring Trepanning Association) system

Thil

Haddag

Nouari

et al. 2013

Mechanics & Industry

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“…Fourier transform and time-domain statistical analysis methods [6] are widely used to analyze the non-stationary characteristics of vibration signals in rotating machinery. Unfortunately, Fourier analysis can only be used in linear system and stationary data.…”

Section: Introductionmentioning

confidence: 99%

High-Speed Spindle Fault Diagnosis with the Empirical Mode Decomposition and Multiscale Entropy Method

Hsieh

Lin

Young

2015

Entropy

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Abstract:The root mean square (RMS) value of a vibration signal is an important indicator used to represent the amplitude of vibrations in evaluating the quality of highspeed spindles. However, RMS is unable to detect a number of common fault characteristics that occur prior to bearing failure. Extending the operational life and quality of spindles requires reliable fault diagnosis techniques for the analysis of vibration signals from three axes. This study used empirical mode decomposition to decompose signals into intrinsic mode functions containing a zero-crossing rate and energy to represent the characteristics of rotating elements. The MSE curve was then used to identify a number of characteristic defects. The purpose of this research was to obtain vibration signals along three axes with the aim of extending the operational life of devices included in the product line of an actual spindle manufacturing company.

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“…Percussive drilling has been extensively studied [1][2][3] in the past 20 years. Many techniques have been developed and applied to the practice of percussive drilling [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Bifurcations and the penetrating rate analysis of a model for percussive drilling

et al. 2010

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In this paper, we investigate a low dimensional model of percussive drilling with vibro-impact to mimic the nonlinear dynamics of the bounded progression. Nonholonomity which arises in the stick-slip caused by the impact during drilling fails to be correctly identified via the classical techniques. A reduced model without non-holonomity is derived by the introduction of a new state variable, of which averaging technique is employed successfully to detect the periodic motions. Local bifurcations are presented directly by using C-L method. Numerical simulations and the penetrating rate analysis along different choices of parameters have been carried out to probe the nonlinear behaviour and the optimal penetrating rate of the drilling system.

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Effect of misalignment on the cutting force signature in drilling

Cited by 8 publications

References 4 publications

Experimental and analytical analyses of the cutting process in the deep hole drilling with BTA (Boring Trepanning Association) system

Experimental and analytical analyses of the cutting process in the deep hole drilling with BTA (Boring Trepanning Association) system

High-Speed Spindle Fault Diagnosis with the Empirical Mode Decomposition and Multiscale Entropy Method

Bifurcations and the penetrating rate analysis of a model for percussive drilling

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