Temperature monitoring in the subsurface during single lip deep hole drilling

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.

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Research of Machining Process on 17-4PH Stainless Steel Superfine Deep-Hole Drilling

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.633-634.688 ◽

2014 ◽

Vol 633-634 ◽

pp. 688-692 ◽

Cited By ~ 1

Author(s):

Zhan Feng Liu ◽

Han Chen Wang

Keyword(s):

Stainless Steel ◽

Wall Thickness ◽

Machining Process ◽

New Method ◽

Hole Drilling ◽

Drilling Process ◽

Deep Hole ◽

Deep Hole Drilling ◽

Gun Drill

Through the analysis of superfine deep-hole drilling process, we used the combination of gun drill and BTA deep-hole drilling process for 17-4PH (0Cr17Ni4Cu4Nb) stainless steel deep-hole drilling test. We measured wall thickness point by point, and calculated the conversion of the eccentricity in a deviation axis line. Which fully embodies the advantage of this process for stainless steel 17-4PH, and provides a new method in super hardness material deep-hole drilling field.

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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.

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IN-PROCESS MEASUREMENT AND NUMERICAL DETERMINATION OF THE TEMPERATURE IN THE CONTACT ZONE DURING SINGLE LIP DEEP HOLE DRILLING

MM Science Journal ◽

10.17973/mmsj.2021_7_2021059 ◽

2021 ◽

Vol 2021 (3) ◽

pp. 4556-4562

Author(s):

R. Wegert ◽

◽

V. Guski ◽

H. - C. Moehring ◽

S. Schmauder ◽

...

Keyword(s):

Temperature Measurement ◽

Contact Zone ◽

Hole Drilling ◽

Experimental Investigations ◽

Deep Hole ◽

Machining Processes ◽

German Research Foundation ◽

Deep Hole Drilling ◽

Process Measurement ◽

Feed Force

In this presented work, the main objective is the in-process measurement of the thermal as-is state near the drilling contact zone by means of a sensor-integrated tool for single lip deep hole drilling (SLD). Additionally, the mechanical quantities feed force and drilling torque are evaluated. The process monitoring is essential to optimize the surface quality as well as the subsurface properties such as hardness and residual stresses. These quantities are strongly dependent on the thermo-mechanical as-is state in the cutting zone and in the contact zone between the guide pads and the drill hole surface. This contribution gives a project overview including the development of a sensor-integrated single lip deep hole driller for the in-process temperature measurement, the integration of sensor systems in the tool as well as the experimental investigations on the temperature, the feed force and the drilling torque during drilling of a 42CrMo4 steel. The temperature measurement at eleven positions in the driller head provides data to observe the heat generation, distribution, and flow independently from the workpiece characteristics. However, one of the greatest benefits is the non-destructive fashion of the measurement system with their sensor integrated in the tool and thus the reusability. A simulation method, which uses the experimental results as a reference, is used to predict the thermo-mechanical conditions in the contact zone of the drill head and the workpiece. The results of these thermo-mechanical process simulations and the validation of this applied FE approach using the measured quantities are presented, too. The results of this work are 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).

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Einfluss des Tiefbohrens auf die Schwingfestigkeit*/Influence of deep hole drilling on the fatigue resistance of components made of quenched and tempered steel 42CrMo4+QT (AISI 4140)

wt Werkstattstechnik online ◽

10.37544/1436-4980-2018-11-12-27 ◽

2018 ◽

Vol 108 (11-12) ◽

pp. 767-772

Author(s):

J. Nickel ◽

N. Baak ◽

D. Biermann ◽

F. Walther

Keyword(s):

Residual Stresses ◽

Dynamic Load ◽

Machining Process ◽

Hole Drilling ◽

Drilling Process ◽

Deep Hole ◽

Deep Hole Drilling ◽

Aisi 4140 ◽

Key Factor ◽

Quenched And Tempered Steel

Die Oberflächen- und Randzoneneigenschaften von mechanisch bearbeiteten Bauteilen sind ein Schlüsselfaktor für deren Schwingfestigkeit und werden stark durch den Bearbeitungsprozess beeinflusst. In dieser Studie wird der Ansatz untersucht, während des Einlippentiefbohrens gezielt Eigenspannungen in die Bohrungswand einzubringen und die Mikrostruktur der Bohrungswand so zu beeinflussen, dass die Bauteile einer höheren zyklischen Belastung standhalten.   The surface and subsurface properties of mechanically machined components are a key factor for their fatigue performance and are strongly influenced by the parameters of the machining process. This study investigates the approach of inducing residual stresses into the bore wall during single-lip deep hole drilling process and influencing the microstructure of the bore wall so that the components can withstand a higher dynamic load.

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Research on Technology Test of 304 Stainless Steel Super Long Deep-Hole Drilling

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.774-776.1137 ◽

2013 ◽

Vol 774-776 ◽

pp. 1137-1140 ◽

Cited By ~ 1

Author(s):

Zhan Feng Liu ◽

Meng Xu

Keyword(s):

Stainless Steel ◽

Cutting Tools ◽

Cutting Parameters ◽

304 Stainless Steel ◽

Hole Drilling ◽

Tool Geometry ◽

Drilling Process ◽

Deep Hole ◽

Deep Hole Drilling ◽

Material Tool

In this paper, through the analysis of 304 stainless steel to elaborate the influence of various factors in the process of drilling from the blade material,tool geometry parameters,cutting parameters and drilling methods.It is proved by selecting reasonable processing, cutting tools and cutting parameters (Φ50mm × 4700mm) 304 stainless steel parts of the drilling process issues can be resolved.

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Study on Technology of Drilling Superfine Deep-Hole in 2Cr13

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.139-141.809 ◽

2010 ◽

Vol 139-141 ◽

pp. 809-812 ◽

Cited By ~ 1

Author(s):

Tian Qi Wang ◽

Zhan Feng Liu ◽

Chong Zhang

Keyword(s):

Stainless Steel ◽

Slenderness Ratio ◽

Cutting Parameters ◽

Hole Drilling ◽

Drilling Process ◽

Deep Hole ◽

Practical Application ◽

Technical Problems ◽

Deep Hole Drilling ◽

Test Result

The paper studies machining technology, cutting parameter. It does experimentation research for drilling superfine deep-hole drilling of 2Cr13 stainless steel, of which slenderness ratio is greater than 300.The test result indicates that the drilling process is stable and reliable, the optimizing cutting technology and cutting parameters is rational, the production of the type of deep hole drilling technical problems have been solved. It has practical application in common production. The parameter can produce superfine deep holes of 2Cr13 stainless steel with the length to diameter ratio 322. In this paper, the key technologies of drilling 2Cr13 stainless steel deep hole are explained, which include selecting the system of drilling deep hole, designing of structure of deep hole bit, selecting the material of cutter blade of bit , and designing the geometry parameters of blade.

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Effect of ultrasonic vibration on the performance of deep hole drilling process

Procedia Manufacturing ◽

10.1016/j.promfg.2021.06.029 ◽

2021 ◽

Vol 53 ◽

pp. 260-267

Author(s):

J. Rajaguru ◽

N. Arunachalam

Keyword(s):

Ultrasonic Vibration ◽

Hole Drilling ◽

Drilling Process ◽

Deep Hole ◽

Deep Hole Drilling

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Hole Accuracy during Deep Hole Drilling for Hydraulic Cylinder Application

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.984-985.67 ◽

2014 ◽

Vol 984-985 ◽

pp. 67-72 ◽

Cited By ~ 1

Author(s):

R. Clifford Benjamin Raj ◽

B. Anand Ronald ◽

A. Velayudham ◽

Prasmit Kumar Nayak

Keyword(s):

Feed Rate ◽

Drill Hole ◽

Hydraulic Cylinder ◽

High Accuracy ◽

Diameter Ratio ◽

Hole Drilling ◽

Deep Hole ◽

Deep Hole Drilling ◽

Very High ◽

Continuous Chip

Deep-hole drilling is a process in which the hole length will be very high when compared to diameter of the drill hole (i.e. length to diameter ratio will be greater than 5). Drilling a deep hole with very high accuracy is difficult process. The current project is about the production of deep hole with the aim to produce a chip which is not a continuous chip and also not a powdery chip. These conditions can be attained by varying the spindle speed and the tool feed rate.

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