CAD Based Mechanistic Modeling of Forces for Generic Drill Point Geometry

Sambhav, Kumar; Dhande, S. G.; Tandon, Puneet

doi:10.3722/cadaps.2010.809-819

Cited by 12 publications

(4 citation statements)

References 24 publications

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“…Sambhav et al 36,37 established a methodology to model the geometry and cutting forces of drills with generic point. With the aid of non-uniform rational basis spline, CAD geometric models were used for a fluted drill in terms of bi-parametric surface patches.…”

Section: Twist Drill Geometric Design Conceptmentioning

confidence: 99%

Recent advances in twist drill design for composite machining: A critical review

Ismail

Dhakal

Dimla

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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In the field of composite technology, inefficient and poor designs of twist drills contribute immensely to the challenges facing drilling of composite materials. An attempt to report some of the drill design methods and their inherent challenges confronting composite machining necessitates the writing of this article. A critical review has been conducted to offer a clear understanding of the current advances in the field of mechanical drilling of composite materials, focusing on geometry, material and parametric tool designs. The inter-dependable effects of thrust force, cutting speed, feed rate, cutting force and torque on drill design are similarly reviewed. This article also reveals other associated issues facing composite drilling including delamination, surface roughness, rapid tool wear and drill breakage. Well-designed drill geometry and good knowledge of drilling parameters afford the producers of polycrystalline diamond, carbide and highspeed steel tooling materials better opportunity of developing a drill that will minimise delamination of the reinforced composites and tool wear and produce a high-quality surface. Twist drill manufacturers and users will benefit from this article as they seek to have well-designed and improved drills.

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Section: Twist Drill Geometric Design Conceptmentioning

confidence: 99%

Recent advances in twist drill design for composite machining: A critical review

Ismail

Dhakal

Dimla

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…In particular, theoretical studies on drilling have focused on the optimization of parameters by developing mathematical models for parameters that affect tool geometry and cutting forces, such as tool material, notch angle, drill diameter and coating [2][3][4][5][6]. Sambhav et al presented a methodology for modeling the geometry of helical drills and drilling forces with the general tip geometry [7]. As a result of the experimental studies made after the changes made in the drill bit design especially for drilling highstrength steels, a decrease in cutting forces and moment has been observed and it is stated that tool breakage is reduced [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Optimization of Drilling Parameters in Tooling for Euro 7 Nozzle Production

KÜÇÜKTÜRK¹,

KÜÇÜKTÜRK²,

Yavaş³

et al. 2021

International Journal of Automotive Science and Technology

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Within the scope of Euro 7 emission norms, new types of injectors and engine parts are produced in order to reduce fuel consumption to minimum levels in diesel engine vehicles and accordingly to reduce emission rates. The complex geometry, high precision and high strength required by the nozzle design that will meet the requirements of the aforementioned norms have made the produc-tion of the required nozzles on existing production platforms difficult and the manufacturers have faced serious problems. Manufacturing companies needed the development of tooling systems suitable for the existing production platform rather than investing in the high-cost machine park. In this study, it is aimed to increase the tool life by choosing the most appropriate machining parameters for the surface quality obtained in the production of a single nozzle, which is de-signed and manufactured using six different tools, which will enable the use of existing machining platforms in the production of Euro 7 nozzles. The average surface roughness value on the nozzle surfaces was determined as Ra = 0.34 µm and it was observed that the desired surface quality was achieved. Performance tests have shown that the design and production activities are successful and that the developed tooling system can be used for the production of Euro 7 Nozzle from existing production platforms.

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“…Related problems are many and various, among which is the undesired distribution of the cutting angles of the main cutting edge due to the limitation of the grinding structure and the grinding method, resulting in poor drilling performance and a higher drilling power [1]. For a long time, people have been making huge effort to reduce the energy consumption in drilling by improving the grinding structure of the drill point [1][2][3][4]. Among the numerous kinds of improved drills, the most outstanding is the multifacet drill (MFD), which is called the Ni Zhifu drill in China.…”

Section: Introductionmentioning

confidence: 99%

The energy conservation optimization design of the cutting edges of the twist drill based on Dijkstra’s algorithm

Xiong

2015

Int J Adv Manuf Technol

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The energy conservation optimization design about geometrical shape and dimensions of the cutting edges (lips) of the twist drill is meant to determine the main cutting edge curve in the rake face that minimizes the drilling power. Dijkstra's algorithm is introduced and applied to serve the above purpose. The rake surface of the twist drill is discretized into a set of nodes and arcs between the adjacent nodes, which together compose a digraph. Cutting angles of elementary cutting tools on the lips of a twist drill are determined by the method of displaying planar image; those angles, together with undeformed chip thickness and width, are substituted into the empirical model of cutting force for elementary cutting tool to obtain the weights of arcs in the digraph, that is, the drilling power. Then, a main cutting edge curve in the rake face that minimizes the drilling power is generated using Dijkstra's algorithm. Meanwhile, an improvement in Dijkstra's algorithm procedures is put forward to reduce time and space complexities of the process and improve smoothness and machinability of the cutting edge curve. A computer program is developed with Matlab 2011b to determine the main cutting edge curve. The calculation results with 0.50 % carbon steel show that the new curved cutting edge reduces the drilling power by 7~8 %, compared to a conventional straight cutting edge.

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CAD Based Mechanistic Modeling of Forces for Generic Drill Point Geometry

Cited by 12 publications

References 24 publications

Recent advances in twist drill design for composite machining: A critical review

Recent advances in twist drill design for composite machining: A critical review

Experimental Optimization of Drilling Parameters in Tooling for Euro 7 Nozzle Production

The energy conservation optimization design of the cutting edges of the twist drill based on Dijkstra’s algorithm

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