Experiments and Analysis of Near-Dry Deep-Hole Drilling System

2010 ◽  
Vol 455 ◽  
pp. 355-359
Author(s):  
Peng Hai ◽  
F. Yuan
Keyword(s):  
Design Method ◽  
Processing System ◽  
Cutting Parameters ◽  
Hole Drilling ◽  
Deep Hole ◽  
Dry Cutting ◽  
Deep Hole Drilling ◽  
Drilling System ◽  
Better Than

Based on the characteristics of near-dry cutting and BTA deep-hole drilling, this paper presented design method of near-dry deep-hole processing system, and then studied on it through experiments. The results show that the near-dry deep-hole processing system has better effects on discharge chips and coolant. At the same time, near-dry cutting function was better than BTA cutting with appropriate cutting parameters through comparing with BTA cutting machining.

Experiment and Analysis on Near-Dry Cutting System in Titanium Alloy Deep-Hole Drilling

2008 ◽  
Vol 392-394 ◽  
pp. 229-233
Author(s):  
H. Peng ◽  
Jiang Ping Wang ◽  
Ze Fu Bao
Keyword(s):  
Titanium Alloy ◽  
Cutting Fluid ◽  
Hole Drilling ◽  
Fluid Consumption ◽  
Deep Hole ◽  
Dry Cutting ◽  
Deep Hole Drilling ◽  
Cutter Wear ◽  
Drilling System ◽  
Cutting System

This paper depicts a boring and trepanning association (BTA) deep-hole drilling system with near-dry cutting technique. The cutting tests are carried out in view of the machining performances under the condition of applying the compressed air and atomized cutting fluid for drilling deep holes on titanium alloy which is difficult to cut. Several cutter materials have been utilized in the tests. The reasonable material of the deep-hole drilling cutter has been determined by analyzing the cutting force, the cutter wear and the surface finish. Environmental pollution decreases owing to little cutting fluid consumption in near-dry cutting system.

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.

A Study on the Monitoring Technology of Extra-Large Deep Hole Drilling Using the Tilt Sensor

2009 ◽  
Vol 626-627 ◽  
pp. 483-488
Author(s):  
Nam Hun Kim ◽  
Il Sik Shin ◽  
Jeong Woo Park
Keyword(s):  
Surface Roughness ◽  
Control System ◽  
Real Time ◽  
Common Rail ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Fuel Supply ◽  
Drilling System ◽  
Tilt Sensor

This study is on the configuration of deep hole drilling system for machining of extra-large common rail fuel supply pipes. Machining conditions for deep hole drilling were deduced and stability of the developed system was verified through measurement of machining surface roughness. Also, a tilt sensor was used for real-time monitoring on machining of deep hole drilling. Machining state was evaluated through composition of a control system for signal feedback.

Cutting Mechanism Study on Technology in Near-Dry Deep-Hole Drilling

2010 ◽  
Vol 455 ◽  
pp. 251-256
Author(s):  
Peng Hai ◽  
H.X. Wei
Keyword(s):  
Cutting Fluid ◽  
Hole Drilling ◽  
Deep Hole ◽  
Mechanism Study ◽  
Cutting Mechanism ◽  
Dry Cutting ◽  
Two Phase ◽  
Deep Hole Drilling ◽  
Mathematical Mode ◽  
Cooling And Lubrication

Near-dry deep hole processing technology is a kind of technology which dry cutting technology is applied to deep hole processing to save energy and decrease environmental pollution. In this paper, the structure and work principle of near-dry deep-hole drilling system were introduced and the cutting mechanism of near-dry deep-hole drilling was analyzed which include the mechanism of cutting fluid atomization and flow, the mechanism of atomized cutting fluid cool and lubricate, and the mechanism of separating chips into short pieces and discharge chips by air stream, etc. The mathematical mode of gas-liquid two-phase flow of atomized cutting fluid in drilling shaft and the cooling and lubrication mechanism of the capillary in cutting zone were introduced. It is found that near-dry deep hole processing has better cooling and lubrication effect through experiments.

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

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.

MQL Technology Including the BTA Deep Hole Drilling Machining

2011 ◽  
Vol 189-193 ◽  
pp. 3071-3074
Author(s):  
Hai Peng ◽  
Tong Li
Keyword(s):  
Processing System ◽  
Water Soluble ◽  
Production Costs ◽  
Cutting Fluid ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Mixed Use ◽  
High Production ◽  
Hole Machining

The traditional cast-type method of BTA deep-hole drilling(such as BTA or DF) has cutting fluid consumption of the existence of large, high production costs, pollution of the environment and endangering the health of the operator and other problems. In this paper, the MQL technology (minimum lubrication technology) is applied to the method of BTA deep-hole machining (ie, near-dry deep-hole processing), we also analyzed the function and effect of MQL machining cutting fluid. Through the near-dry deep-hole drilling experiment, we find that a water-soluble cutting fluid has good atomization effect and the processing system also has fine effect of cooling and chip evacuation. We proposed mixed-use oil and the low-temperature cold spray methods to improve the tool lubrication and cooling effect for some great issues such as tool wear.

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.

A Study on the Monitoring Technology of Extra-Large Deep Hole Drilling Using the Acceleration Sensor

2010 ◽  
Vol 154-155 ◽  
pp. 769-774
Author(s):  
Nam Hun Kim ◽  
Il Sik Shin ◽  
Jeong Woo Park
Keyword(s):  
Surface Roughness ◽  
Control System ◽  
Real Time ◽  
Common Rail ◽  
Hole Drilling ◽  
Deep Hole ◽  
Acceleration Sensor ◽  
Deep Hole Drilling ◽  
Fuel Supply ◽  
Drilling System

This study is on the configuration of deep hole drilling system for machining of extra-large common rail fuel supply pipes. Machining conditions for deep hole drilling were deduced and stability of the developed system was verified through measurement of machining surface roughness. Also, an acceleration sensor was used for real-time monitoring on machining of deep hole drilling. Machining state was evaluated through composition of a control system for signal feedback.

Experimental Research on the System Performance in Near-Dry Deep Hole Drilling

2010 ◽  
Vol 455 ◽  
pp. 98-102 ◽  
Author(s):  
H.B. Zhao ◽  
Y.F. Nan
Keyword(s):  
Surface Quality ◽  
System Performance ◽  
Cutting Fluid ◽  
Hole Drilling ◽  
Drilling Process ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Ideal System ◽  
Drilling System ◽  
Chip Removal

The near-dry deep hole drilling system was taken as object in this study，and the contrast experiment between the deep hole drilling system and the traditional（wet）deep-hole drilling system，including the cutting force，the tool wear，the surface quality and the chip-break have been done. The results show that the near-dry system drill stability and have better effort in cooling，lubrication，chip removal effective. The tool life and surface quality within the hole are better，at the same time，it can greatly reducing the amount of cutting fluid，the costs and the pollution of the environment. So we can get a conclusion that it is an ideal system in green drilling process.

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