Experimental Study on Deep Hole Drilling Gamma Titanium Aluminide

γ-titanium aluminide is a new intermetallic structural material. γ-titanium aluminide alloy has the advantages of high temperature resistance, high performance of anti-oxidation effect, low-density, high specific strength and rigidity etc. But high strength, hardness and brittleness of the material also make processing difficultly. High cutting force and cutting temperature affecting a decline in cutting lifetime and cutting efficiency. This problem is more acute in deep hole drilling. In this paper, we have analyzed the cutting performance of γ-titanium aluminide and designed a deep-hole drills with appropriate tool material and geometric parameters. The experimental result shows: this drill bit is stable and efficient in drilling and can achieve a good quality.

Download Full-text

Preliminary Study on Deep-Hole Drilling Gamma Titanium Aluminide

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.139-141.831 ◽

2010 ◽

Vol 139-141 ◽

pp. 831-834 ◽

Cited By ~ 4

Author(s):

Lin Zhu ◽

Xin Chen ◽

Bernd Viehweger

Keyword(s):

Automobile Industry ◽

Titanium Aluminide ◽

Tool Material ◽

Cutting Fluid ◽

Experimental Result ◽

Hole Drilling ◽

Deep Hole ◽

Gamma Titanium Aluminide ◽

External Edge ◽

Deep Hole Drilling

γ-titanium aluminide are considered as a potential light weight material. γ-titanium aluminide alloy has the advantages of high temperature resistance, high performance of anti-oxidation effect, low-density, high specific strength and rigidity etc. This material is suitable to be applied in aeronautics, astronautics and automobile industry. But high hardness, brittleness and mechanical strength make it hard to process. This problem is more acute in deep hole drilling. In this paper, we have analyzed the cutting performance of γ- titanium aluminide and designed a deep-hole drill with three different tool materials. The experimental result shows: (1) YG8 cemented carbide is the appropriate tool material for drilling γ-titanium aluminide. (2) Small rake angle of external edge (γo=-1°) and big clearance angle of external edge (αo=10~12°) should be chosen. (3) Best wear results are obtained when oil is utilized as cutting fluid.

Download Full-text

Tiefbohren von thermoplastischen Kunststoffen*/Single-lip deep hole drilling of thermoplastics

wt Werkstattstechnik online ◽

10.37544/1436-4980-2016-05-50 ◽

2016 ◽

Vol 106 (05) ◽

pp. 336-340

Author(s):

D. Prof. Biermann ◽

M. Kirschner

Keyword(s):

Process Optimization ◽

High Performance ◽

Hole Drilling ◽

Manufacturing Processes ◽

Metallic Materials ◽

Deep Hole ◽

Deep Hole Drilling

Hochleistungskunststoffe gewinnen stetig an industrieller Bedeutung und ersetzen in zahlreichen Anwendungen metallische Werkstoffe. Um dieser Entwicklung auch aus fertigungstechnischer Sicht gerecht zu werden, ist die parallele Optimierung von relevanten Fertigungsverfahren unumgänglich. Das Institut für spanende Fertigung ISF der Technischen Universität Dortmund nimmt sich aktuell einer dieser Herausforderungen an und beschäftigt sich mit der Prozessoptimierung des Einlippentiefbohrens thermoplastischer Kunststoffe.   High-performance plastics are steadily gaining ground in the industry, replacing metallic materials in numerous applications. To keep pace with this development in manufacturing, a synchronous optimization of relevant manufacturing processes is crucial. The Institute of Machining Technology currently deals with one of these challenges, focusing on the process optimization of single-lip deep hole drilling of thermoplastics.

Download Full-text

Modeling and Optimization of Machining Parameters Using Regression and Cuckoo Search in Deep Hole Drilling Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.892.177 ◽

2019 ◽

Vol 892 ◽

pp. 177-184 ◽

Cited By ~ 1

Author(s):

Azizah Mohamad ◽

Azlan Mohd Zain ◽

Noordin Mohd Yusof ◽

Farhad Najarian ◽

Razana Alwee ◽

...

Keyword(s):

Mathematical Models ◽

Cuckoo Search ◽

Experimental Result ◽

Hole Drilling ◽

Drilling Process ◽

Machining Parameters ◽

Deep Hole ◽

Computing Technique ◽

Deep Hole Drilling ◽

Modeling And Optimization

This study presents the modeling and optimization of the machining parameters in deep hole drilling process using statistical and soft computing technique. Regression analysis is used for modeling and Cuckoo Search, CS algorithm is used for the optimization process. Design of Experiment (DoE), have been carried using a Full Factorial design with added centre point that comprises of machining parameters (feed rate (f), spindle speed (s), depth of hole (d) and minimum quantity lubrication, MQL (m)) and machining performance which is surface roughness, Ra. Next, the mathematical models (Multiple Linear Regression, MLR and 2-factor interaction, 2FI) are developed for the experimental results of Ra and Analysis of variance, ANOVA are used to check the significance of the models developed. The results showed that both of mathematical models (MLR and 2FI) have outperformed the minimum Ra value compared to the experimental result.

Download Full-text

Experimental Investigation of Bubble-Mixed Cutting Fluid Delivery for Micro Deep-Hole Drilling

Journal of Micro and Nano-Manufacturing ◽

10.1115/1.4043959 ◽

2019 ◽

Vol 7 (2) ◽

Author(s):

Chi-Ting Lee ◽

Soham S. Mujumdar ◽

Shiv G. Kapoor

Keyword(s):

High Performance ◽

Cutting Fluid ◽

Hole Drilling ◽

Drilling Process ◽

Deep Hole ◽

Delivery Method ◽

Dry Cutting ◽

Deep Hole Drilling ◽

Fluid Delivery ◽

Drilling Performance

In drilling, chip-clogging results in increased drilling temperature, excessive tool wear, and poor hole quality. Especially, in microdrilling, low rigidity of the tool and inability of cutting fluid to penetrate narrower tool–workpiece interface significantly reduce the drilling performance. A novel bubble-mixed cutting fluid delivery method proposed in this research aims toward achieving a high-performance micro deep-hole drilling process with a significant reduction in the consumption of cutting fluid. Experimental results show that the bubble-mixed cutting fluid delivery method achieves lower thrust force during drilling, higher drilled depth before tool breakage, and lower dimensional and circularity errors when machining deep holes in comparison with dry cutting or conventional flood delivery method. It is also found that the smaller-sized bubbles effectively penetrate the tool–workpiece interface during the drilling producing deeper holes by better chip evacuation and cooling.

Download Full-text

Application and Technology Research in Deep-Hole Drilling System

Materials Science Forum ◽

10.4028/www.scientific.net/msf.800-801.506 ◽

2014 ◽

Vol 800-801 ◽

pp. 506-510

Author(s):

Hai Yan You ◽

Shu Cai Yang ◽

Cai Xu Yue ◽

Xue Feng Wu ◽

Yang Xie

Keyword(s):

Cutting Speed ◽

High Hardness ◽

High Strength ◽

Cutting Parameters ◽

Hole Drilling ◽

Drilling Process ◽

Deep Hole ◽

Deep Hole Drilling ◽

Chip Breaking ◽

Content Selection

With the new type of high strength , high hardness difficult machining parts appear constantly, both for the quality of deep processing, durability of the tools, or reliability of the drilling systems are putting forward higher requirements. This paper mainly describes the characteristics of deep-hole drilling systems and applications, and content selection of cutting parameters, impact of cutting speed and feed rate for chip breaking and so do some explanation, These have certain guiding significance for chip breaking can get better. Finally, introduce the deep-hole drilling in the drilling process causes common problems and solutions, to provide some references for practical manufacture process.

Download Full-text