Fundamental Experiment of Near-Dry Deep Hole Drilling with BTA Tool - The Optimal Cutting Conditions and Tool’s Geometry

2012 ◽  
Vol 523-524 ◽  
pp. 109-112
Author(s):  
Fukuhito Nagata ◽  
Koji Akashi ◽  
Daisaku Ishibashi
Keyword(s):  
Cutting Speed ◽  
Cutting Conditions ◽  
Hole Drilling ◽  
Cutting Condition ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Environmental Destruction ◽  
Optimum Cutting ◽  
Cutting Experiments ◽  
Fundamental Experiment

The BTA tool is a tool for deep-hole drilling. The deep-hole which be machined by this tool has the excellent straightness and roughness. However, it's use a lot of cutting oil. Therefore, it will lead to environmental destruction. Thereupon, in this study, it is applied the near-dry system to the deep-hole drilling with BTA tool. In the previously, it was designed the experimental device with a double tube system, and the cutting experiments was carried out. In this system, the chip is discharged through inside of the inner tube. Frequently, the chip is cannot be divided by the adhesion on the cutting edge during drilling. Thereby, the chip was jammed into the inside of tool’s tube. It is tried experiments of various cutting conditions, cutting speed and feed rate, by tools with different geometry, height and width, of the chip-breaker. And, it is observed the discharge condition of chips, the chip’s shape and the situation of adhesion. As a result, it can be found the optimum cutting condition and tool’s geometry for a continuous chip’s discharge while the deep-hole is drilling by a BTA tool in near-dry system.

Influence of cutting parameters on the formation of white etching layers in BTA deep hole drilling

2020 ◽  
Vol 87 (11) ◽  
pp. 674-682
Author(s):  
Simon Strodick ◽  
Kai Berteld ◽  
Robert Schmidt ◽  
Dirk Biermann ◽  
Andreas Zabel ◽  
...  
Keyword(s):  
Surface Integrity ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Substrate Material ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Aisi 4140 ◽  
High Feed ◽  
Subsurface Zones

AbstractIn this study, the influence of cutting speed and feed rate on surface integrity in Boring Trepanning Association (BTA) deep hole drilling of AISI 4140+QT is investigated. Microstructure and micro-hardness in the subsurface zones of bores are analyzed, using metallographic and micromagnetic methods. It was found that when using high feed rates and cutting speeds, white etching layers (WEL) form at the surface of the bores. These layers are up to three times harder than the substrate material and have a maximum thickness of approx. {t_{\mathrm{WEL}}}\approx 12\hspace{0.1667em}\text{\textmu m}. WEL were usually followed by a transitional layer, so that elevated hardness was observed until a depth of {d_{\mathrm{surf}}}=35\hspace{0.1667em}\text{\textmu m} below the surface. Magnetic Barkhausen noise (MBN) analysis proved to be applicable for the fast and reliable detection of WEL. The presented results contribute to gaining a deeper understanding of the complex interrelations between the design of the BTA process, the resulting microstructure in the machined component and the properties of the conditioned surface. Based on discovered correlations, a dynamic process control will be developed for BTA deep hole drilling, which will allow reliably tailoring surface integrity of components to specific demands, like an optimized fatigue performance.

Application and Technology Research in Deep-Hole Drilling System

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.

Ecological Deep Hole Drilling by Novel Coated and Designed Drill

2007 ◽  
Vol 329 ◽  
pp. 657-662 ◽  
Author(s):  
Yoshihiko Murakami ◽  
Takahiro Yamamoto
Keyword(s):  
Heat Generation ◽  
Minimum Quantity Lubrication ◽  
Hole Drilling ◽  
Cutting Condition ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Tialn Coating ◽  
Titanium Aluminum ◽  
Titanium Aluminum Nitride ◽  
Poly Crystalline Diamond

Ecological deep hole drilling is proposed in this paper. The ecological drilling means a cutting without coolant or minimum quantity lubrication (MQL). Under a cutting condition with a small amount of lubrication, the drills should be designed availably to control heat generation during cutting. An attempt is made on the development of innovative drills which are available for use under ecological cutting conditions. These drills were coated especially with a titanium aluminum nitride (TiAlN) film and a poly crystalline diamond layer. After TiAlN coating flutes of drills were lapped with diamond compounds [1]. The result of studies on the process and application of the innovative drills was reported.

Influence of the Cutting Speed and Feed Rate on Torque, Feed Force, Roughness and Shape of the Chips During Deep Hole Drilling

2013 ◽  
Vol 10 (2) ◽  
pp. 11-14
Author(s):  
Martin Letavay ◽  
M. Laluha ◽  
Jozef Pilc
Keyword(s):  
Feed Rate ◽  
Cutting Forces ◽  
Cutting Speed ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Feed Force ◽  
Gun Drill ◽  
Steel Grades

Abstract This article describes methodology and realization of the deep hole drilling test. Goal of this trial is to define influence of the cutting speed and feed rate on torque and feed force. As well as during the test here was a focus on roughness and shape of the chips. A gun drill was used for deep hole drilling and we used etalon material, were here is possible to define cutting forces without any further testing of different steel grades. Also there is a description of CNC program, which was used for above mentioned testing and it can be utilized during other different trials.

Deep Hole Drilling Technique (DHD)

2019 ◽  
Vol 88 (6) ◽  
pp. 485-488
Author(s):  
Shinji KAWAI ◽  
Takuya NAGAI ◽  
Shigetaka OKANO
Keyword(s):  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Drilling Technique

scholarly journals Temperature monitoring in the subsurface during single lip deep hole drilling

2020 ◽  
Vol 87 (12) ◽  
pp. 757-767
Author(s):  
Robert Wegert ◽  
Vinzenz Guski ◽  
Hans-Christian Möhring ◽  
Siegfried Schmauder
Keyword(s):  
Cutting Parameters ◽  
Drill Hole ◽  
Machining Process ◽  
Hole Drilling ◽  
Drilling Process ◽  
Deep Hole ◽  
Machining Processes ◽  
Deep Hole Drilling ◽  
Feed Force ◽  
Cutting Zone

AbstractThe surface quality and the subsurface properties such as hardness, residual stresses and grain size of a drill hole are dependent on the cutting parameters of the single lip deep hole drilling process and therefore on the thermomechanical as-is state in the cutting zone and in the contact zone between the guide pads and the drill hole surface. In this contribution, the main objectives are the in-process measurement of the thermal as-is state in the subsurface of a drilling hole by means of thermocouples as well as the feed force and drilling torque evaluation. FE simulation results to verify the investigations and to predict the thermomechanical conditions in the cutting zone are presented as well. The work is part of an interdisciplinary research project in the framework of the priority program “Surface Conditioning in Machining Processes” (SPP 2086) of the German Research Foundation (DFG).This contribution provides an overview of the effects of cutting parameters, cooling lubrication and including wear on the thermal conditions in the subsurface and mechanical loads during this machining process. At first, a test set up for the in-process temperature measurement will be presented with the execution as well as the analysis of the resulting temperature, feed force and drilling torque during drilling a 42CrMo4 steel. Furthermore, the results of process simulations and the validation of this applied FE approach with measured quantities are presented.

Optimization of roundness error in deep hole drilling using moth-flame optimization

2021 ◽  
Author(s):  
Anis Farhan Kamaruzaman ◽  
Azlan Mohd Zain ◽  
Noordin Mohd Yusof ◽  
Farhad Nadjarian ◽  
Rozita Abdul Jalil
Keyword(s):  
Hole Drilling ◽  
Deep Hole ◽  
Roundness Error ◽  
Deep Hole Drilling
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