253 Deep hole drilling operation on super engineering plastic sheet by small diameter drill

2007 ◽  
Vol 2007.56 (0) ◽  
pp. 85-86
Author(s):  
Masamichi KONDO ◽  
Hiroki ENDO ◽  
Etsuo MARUI
Keyword(s):  
Small Diameter ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Plastic Sheet ◽  
Drilling Operation ◽  
Engineering Plastic

Multi-channel laser system with phase locking by holographic gain gratings and small diameter deep hole drilling

2007 ◽  
Author(s):  
Alexander V. Fedin ◽  
Andrey V. Gavrilov ◽  
Sergey N. Smetanin ◽  
Sergey A. Solokhin
Keyword(s):  
Phase Locking ◽  
Laser System ◽  
Small Diameter ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling

scholarly journals Electrochemical Small Diameter Deep Hole Drilling of Powder Metal Steel

2020 ◽  
Vol 44 (4) ◽  
Author(s):  
Hacı Bekir Özerkan ◽  
Can Çoğun
Keyword(s):  
Small Diameter ◽  
Hole Drilling ◽  
Deep Hole ◽  
Powder Metal ◽  
Deep Hole Drilling

The Performance of Small Diameter Twist Drills in Deep-Hole Drilling

2006 ◽  
Vol 128 (4) ◽  
pp. 884-892 ◽  
Author(s):  
Robert Heinemann ◽  
Srichand Hinduja ◽  
George Barrow ◽  
Gerhard Petuelli
Keyword(s):  
Tool Life ◽  
High Speed ◽  
Small Diameter ◽  
High Speed Steel ◽  
Minimum Quantity Lubrication ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Flute Surface ◽  
Twist Drills

This paper investigates the performance of small diameter high-speed steel twist drills drilling boreholes with a depth of ten times the diameter into carbon steel AISI 1045 using minimum quantity lubrication. The performance of small twist drills is determined, first, by their deep-hole drilling capability, i.e., in how far the cutting forces can be kept at a noncritical level by maintaining the chip disposal, and, second, by their tool life. This work shows that both the deep-hole drilling capability and tool life of small drills are strongly dependent on their geometry, in particular the size of the chip flutes, and the flute surface topography.

Development of Deep Hole Drilling Technology for Tube Sheet of Steam Generator

2014 ◽  
Author(s):  
Shinichiro Ueda ◽  
Takuya Yagishita ◽  
Jun Maeno ◽  
Masanari Okuda
Keyword(s):  
Steam Generator ◽  
Control Technique ◽  
Hole Drilling ◽  
Drilling Machine ◽  
Tube Sheet ◽  
Deep Hole ◽  
Steam Generators ◽  
Deep Hole Drilling ◽  
Drilling Operation ◽  
Drilling Technology

Advanced PWR nuclear power plant has very-large steam generators of which tube-sheet is diameter 5000mm / thickness 500 mm / weight 100 ton or larger. Drilling of very thick tube sheet needs deep-hole drilling technique with strict dimensional tolerance control. In addition, the tube sheet has 10,000 or more tube holes, which means that stable drilling operation is mandatory for productivity control. Upon such background, steam generator tube sheet drilling operation needs precise dimensional control technique with highly efficient productivity. In this study, authors did (1) feasibility-study and development of deep hole drilling machine with the Boring and Trepanning Association (BTA) method, (2) cutting parameter evaluation such as feed rate and cutting velocity, (3) tube hole measurement system development, and (4) drill exchange program development with monitoring drilling machine motor loads and setting alarm level for the loads. Based on techniques developed by this study, IHI has achieved high-accuracy and stable deep-hole drilling technology for very-thick tube sheets applicable to the very-large steam generators.

Deep-Hole Drilling in Stainless Steel with Small Diameter Twist Drills

2012 ◽  
Vol 433-440 ◽  
pp. 552-557 ◽  
Author(s):  
Gerhard Petuelli ◽  
Christoph Nentwig
Keyword(s):  
Stainless Steel ◽  
Small Diameter ◽  
Hole Drilling ◽  
Tool Geometry ◽  
Twist Drill ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
The Individual ◽  
The Impact ◽  
Twist Drills

In this paper results of manufacturing tests are described done in order to evaluate the performances of twist drills of diameter d = 1.2 mm and 1.4 mm respectively, if boring into stainless steel X90CrMoV18 (1.4112). Deep-hole drilling was realized thus, that the depth of the bore hole was greater than 10 times the diameter of the twist drill (L/d >10). In order to reduce the impact on the environment caused by the coolant, it was found that minimum quantity lubrication (MQL) can be applied. Hence, the ecology of the mass production of perforated discs for the food processing industry can be improved. The performance of the several small diameter twist drills was determined and evaluated by, firstly, their deep-hole drilling capability, e.g. assessed by the variation or even increase of cutting forces with increasing depth and travel, whether the forces exceed a critical level due to poor chip extraction. In addition, the suitability to use or rather implement the different small diameter twist drills for high-speed cutting (HSC) and finally the individual tool service life for each investigated twist drill. This research project has shown that the accomplishable performance and operating time are strongly dependent on tool cutting material and the tool geometry, especially the size of the chip flutes of a twist drill, as well as the individual coating of the cutting tools.

Modelling Complex Force Systems, Part 1: The Cutting and Pad Forces in Deep Drilling

1993 ◽  
Vol 115 (2) ◽  
pp. 169-176 ◽  
Author(s):  
B. J. Griffiths
Keyword(s):  
Cutting Forces ◽  
Cutting Edge ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Drilling ◽  
Force System ◽  
Friction Forces ◽  
Deep Hole Drilling ◽  
Drilling Operation ◽  
Force Systems

This paper is the first part of a two-part series which analyzes the complex force system existing within a deep hole drilling operation where cutting forces exist at a single cutting edge and burnishing and friction forces exist at two pads. In this first paper the forces at the pads and cutting edge are determined by (1) assuming that the pad forces are related by coefficients and (2) by the use of complimentary dynamometers.

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