A practical method to determine rake angles of twist drill by measuring the cutting edge

li, Z.; Zhang, W.; Xiong, Dilin

doi:10.1016/j.ijmachtools.2010.04.001

Cited by 10 publications

(3 citation statements)

References 10 publications

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“…A practical method to determine the cutting edges and rake angles has been carried out by Li et al 35 Cutting edge points and the rake angles were examined using two-dimensional (2D) tool microscope and image-based instrument and numerical computation, respectively. This method proved effective compared with common unaffordable laborious analysis required in rake angle determination, because it does not require high level of co-ordinate transformation and mathematical competence.…”

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:

View full text Add to dashboard Cite

show abstract

“…The method was further developed [23] with the addition of the scan of the indentation left by the diamond tool on a substrate and the comparison of the measurement of this with the original scan of the tool. Li et al [24] developed a system capable of acquiring the 3D geometry of the twist drill, and from the acquired data obtain the normal rake angle. As the system does not allow the complete scan of the tool, the characteristics that can be measured are limited to the mentioned rake angle of twist drills.…”

Section: Introductionmentioning

confidence: 99%

3D Identification of Face and Flank in Micro-mills for Automatic Measurement of Rake Angle

Petrò

Moroni

2020

Nanomanuf Metrol

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In an Industry 4.0 context, to each object a "digital twin" is associated, which is a virtual counterpart of the object itself. In the case of a tool this includes, together with its material and manufacturing information, its solid geometry. Tool geometry knowledge is fundamental to enable effective tool management, manufacturing verification, and tooling simulation. If for tool management, the conventional 2D presetting is sufficient, tooling simulation and tool manufacturing verification require a complete 3D characterization. This is particularly true in the case of the microtools: the process of micro-chip formation is still a research subject.Although the 3D geometry of tool is well established in the ISO 3002 series of standard, only recently 3D measurement of tools has been made possible by new measuring systems. Still, tool geometry verification requires a lot of human intervention.This paper aims at setting the base for the automatic analysis point mesh scanned on the whole surface of tools, and in particular microtools.The first step for doing this is the identification of the active surfaces of the tool, that is the face and the flank plus the cutting edge. The identification of these geometric features is in general possible thanks to their specific characteristics: in particular, the cutting edge is characterized by a high curvature, and it separates the face from the flank. This paper considers cylindrical micro end-mills as a first example of an approach that can be extended to in principle any kind of tool. The cylindrical helix characterizing the cutting edge is the key geometry to be considered in the development of the specific method. Once the tool features (face, flank, and cutting edge) have been separated, of the tool angles, for instance, can be estimated. As first angle to study, the rake angle has been selected. The approach will be validated on simulated data and on real scans of micro-tools.

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“…Experimental results demonstrated the ability of the proposed system for aligning and measuring a round-nose micro-tool. More recently, a rake angle calculation and cutting edge measurement scheme for twist drills was presented in [18], and this way was free from complex coordinate and mathematical operations. [19] developed a cutting edge measurement in subpixel precision, and the method can avoid a refixturing error caused by the off-line measurement in conventional tool lapping approaches.…”

Section: Introductionmentioning

confidence: 99%

Optical Image Inspection of Cutting Tool Geometry for Grinding Machines

Chen

Chang

Lee

et al. 2012

AMR

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The purpose of this paper is to develop a tool image inspection and measuring system by C++ Builder. Firstly, tool images are captured online for geometry analysis via a disassembled inspection mechanism mounted on the Z-axis of a five-axis tool grinding machine. One can use the controller of the machine to set the coordinate location of the mechanism and implement the humanized functions of autofocusing and automatic measurements. The digital images are calculated by the subpixel approach to improve the measurement resolution, and filtered the edge point location by Hough transform to upgrade the precision. The human machine interface (HMI) has a tutoring manner for users to operate the measuring procedures. These proposed functions can measure the geometric dimension such as the diameter, radius, and angle of different end mills or drills after finishing the tool grinding processes. Furthermore, the grinding processes can refer the online measured results to compensate the tool dimension. Therefore, this online image inspection and measuring system can improve the precision of tool grinding, product quality, and reduce the product cost. Finally, experiments are presented to show that the repeatability errors are ± 2 μm and ± 1 μm for the diameter and the radius measurements of end mills, respectively. The percentage error is 0.116％ for measuring the point angle of a drill. Thus, the results demonstrate the effectiveness of the proposed method that can be employed to measure tool geometry of different cutting tools.

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A practical method to determine rake angles of twist drill by measuring the cutting edge

Cited by 10 publications

References 10 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

3D Identification of Face and Flank in Micro-mills for Automatic Measurement of Rake Angle

Optical Image Inspection of Cutting Tool Geometry for Grinding Machines

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