Process adapted structure optimization of deep hole drilling tools

Biermann, Dirk; Kersting, Michael; Kessler, N.

doi:10.1016/j.cirp.2009.03.102

Cited by 28 publications

(9 citation statements)

References 9 publications

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“…Compared to other processes the constricted space in the drill flutes often causes chip accumulation as shown by Zhang et al [1] and Biermann et al [2]. As a consequence, the chips are scratching the borehole surface which results in degraded surface finish and adhered chips on the borehole surface as shown by Shyha et al [3] as well as high process temperatures [4], and other issues like fast tool wear and disruptions in automated processes.…”

Section: Introductionmentioning

confidence: 91%

Quantitative analysis of chip extraction in drilling of Ti6Al4V

2015

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Section: Introductionmentioning

confidence: 91%

Quantitative analysis of chip extraction in drilling of Ti6Al4V

2015

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“…The results showed that a decreased cutting zone temperature could effectively enhance chip breaking and reduce the length of chip formation. Biermann et al [22] proposed a finite element model of staggered teeth BTA deep hole drilling by the topology optimization of the structure parameters of the drill, to increase the area of the chip removal channel and intensify the strength of the body. Tnay et al [23] presented a numerical calculation fluid hydrodynamics model of single-lip deep hole gun drilling, revealing the effect of the dub-off angle on chip evacuation, and optimized the angle to increase chip removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Chip Deformation and Breaking with a Staggered Teeth BTA Tool in Deep Hole Drilling

Zheng

et al. 2019

Metals

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The problem of chip breaking and evacuation is the key point of staggered teeth boring and trepanning association (BTA) drilling. The factors that influence chip breaking with staggered teeth BTA deep hole drilling are analyzed by using the chip bending deformation mechanism for chip formation and flow through the rake face and chip breaker. This study investigated the distribution and variation of chip deformation and breaking along drilling conditions, with respect to drilling radius, drilling process parameters, tool wear, and chip breaker geometric parameters. The results show that the tool-chip contact length is about 1.65 times the chip thickness in staggered teeth BTA drilling. The cutting radius of the teeth has a considerable influence on the chip thickness. Compared with the drilling speed, the feed has a greater impact on chip deformation and breaking, and the chip thickness and strain increase with increased feed. Increased drilling depth and tooth wear aggravates the friction state between the chip and the rake face, augments chip thickness and tool-chip contact length, and increases the chip’s strain increment. As the width of chip breaker decreases and the height increases, the chip strain increases and the breaking conditions are improved.

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“…Woon et al [11] proposed a cutting force model of tooth for gundrilling, under the simultaneous consideration of cutting and plowing, and the cutting force coefficients along cutting edge were regarded as constants. Biermann et al [12] used BTA deep hole drilling experiments on a large number of different diameter workpieces, indicating that the drilling force along the drilling radius was nonuniform. Lazar et al [13] and Watson et al [14] revealed that the cutting force coefficients along the cutting radius of the twist drill were nonlinear with the cutting radius.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Distribution Laws of Drilling Force for Staggered Teeth BTA Deep Hole Drill

Zheng

et al. 2018

Mathematical Problems in Engineering

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The boring and trepanning association (BTA) deep hole drilling is a typical self-guiding machining method. The drilling force and its distribution laws along the cutting radius directly affect the stability of drilling and the quality of machined hole. Based on the oblique cutting theory, a novel drilling force model is developed to predict the thrust and torque for staggered teeth BTA deep hole drill with variable geometries. Using the constraint relationships between the cutting force components and cutting angles, combined with the measured drilling force during the drill entrance, the parameters of the model including normal shear angle, normal friction angle and shear stress involved in the cutting force coefficients along the cutting radius, and the axial and circumferential friction coefficients between the guide pads and the hole wall are obtained. The model-predicted drilling force is validated by experimental results.

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Process adapted structure optimization of deep hole drilling tools

Cited by 28 publications

References 9 publications

Quantitative analysis of chip extraction in drilling of Ti6Al4V

Quantitative analysis of chip extraction in drilling of Ti6Al4V

Investigation of Chip Deformation and Breaking with a Staggered Teeth BTA Tool in Deep Hole Drilling

Modeling and Distribution Laws of Drilling Force for Staggered Teeth BTA Deep Hole Drill

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