On the Influence of Drilling Depth Dependent Modal Damping on Chatter Vibration in BTA Deep Hole Drilling

Weinert, Klaus; Webber, Oliver; Peters, C.

doi:10.1016/s0007-8506(07)60123-1

Cited by 30 publications

(12 citation statements)

References 5 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%

“…Two particular dynamic phenomena can be distinguished: chatter and spiral effects. The chatter effect is a frequent vibration phenomenon in deep hole drilling [17][18][19][20][21][22]. It corresponds to the auto-excitation vibrations in torsion motion, and conducts generally to tool wear acceleration as well as to a bad surface finish at the end of blind holes [23].…”

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%

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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“…So its application is very extensive. A lot of vibration drilling incentives, through the design of permanent magnetic materials and magnetic circuit shape made of permanent magnet vibration exciter is reasonable, can make the principal axes of attraction and repulsion alternately in the production process, and reply to effect by spring force so that the spindle vibration amplitude, can be adjusted through regulating the gap size and magnetic circuit change the repulsion and suction to achieve, vibration frequency adjustment can be realized by changing the speed of the spindle or number of vibrations per turn [4].…”

Section: Introductionmentioning

confidence: 99%

Application of Permanent Magnetic Material in Vibration Drilling

Wang¹,

Zhang²,

Zejian³

et al. 2018

Proceedings of the 2018 3rd International Workshop on Materials Engineering and Computer Sciences (IWMECS 2018)

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“…If the bore diameter is larger than 20 mm, the BTA (Boring and Trepanning Association) deep-hole drilling process is usually employed [1]. This method creates holes with good surface finish and straightness, but the process is susceptible to dynamic disturbances like chatter [2] and spiralling [3].…”

Section: Introductionmentioning

confidence: 99%

Simulation of the BTA deep-hole drilling process

Biermann

Sacharow

Wohlgemuth

2009

Prod. Eng. Res. Devel.

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The dynamic disturbances of the deep-hole drilling process pose a great challenge. Especially spiralling, which causes holes with several lobes, can damage the workpiece irreparably. The causes for spiralling are not well explored yet, and it is important to analyze which conditions and process parameters can cause the spiralling. This article presents a simulation system for the idealized BTA (Boring and Trepanning Association) deep-hole drilling process. Methods of computer graphics allow the realistic modeling of the cutting edge and the workpiece. The simulation is able to calculate the sweep volume, cutting forces, and regenerative tool vibrations. It is also possible to generate the resulting geometry of the workpiece depending on the eigenfrequencies of the boring bar and on the process parameters. Thus, the pre-conditions for the spiralling can be analyzed.

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On the Influence of Drilling Depth Dependent Modal Damping on Chatter Vibration in BTA Deep Hole Drilling

Cited by 30 publications

References 5 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

Application of Permanent Magnetic Material in Vibration Drilling

Simulation of the BTA deep-hole drilling process

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