New method for detecting active infeed of cutting edge of end mills

2021 ◽  
Author(s):  
Petr M. Pivkin ◽  
Vladimir A. Grechishnikov ◽  
Ilya V. Minin ◽  
Mikhail Mosyanov ◽  
Alexsey B. Nadykto
Keyword(s):  
Cutting Edge ◽  
New Method ◽  
End Mills

A New Method for the Preparation of Cutting Edges via Grinding

2013 ◽  
Vol 769 ◽  
pp. 85-92 ◽  
Author(s):  
Christian Effgen ◽  
Bejamin Kirsch
Keyword(s):  
Tool Path ◽  
Cutting Edge ◽  
New Method ◽  
Grinding Wheel ◽  
Outer Diameter ◽  
Processing Times ◽  
Elastic Bond ◽  
End Mills ◽  
Grinding Machine ◽  
Milling Tools

In this paper, a new method for the preparation of cutting edges via grinding is presented. This method enables the manufacturing of the tool macro and micro geometry in one setup without reclamping, allowing improved flexibility, repeatability and accuracy at reduced processing times. This new method is path controlled using a special elastic bond for the grinding wheels. By using elastic bond, a rounded cutting edge instead of undesired chamfers can be achieved, as the bond nestles around the cutting edge and elastically deforms. The elastic bond is specified by the grain concentration and its basic hardness. Besides the specifications of the bond, the process kinematics highly influences the properties of the cutting edge. The kinematics is a combination of the tool path (machining strategy) and the grinding wheel geometry. The presented experiments include the examination of three different kinematics using three different grinding wheel geometries, FEPA 1A1, 1V1 and 4A2. For each kinematics, three different grain concentrations and three degrees of basic bond hardness were tested, resulting in a complete amount of 27 parameter combinations. The outer diameter cutting edges of cemented carbide milling tools (end mills) were prepared in a 5-axis tool grinding machine. The shape and quality of the achieved cutting edge rounding was qualitatively evaluated by means of scanning electron microscopy (SEM).

scholarly journals Influence of End Mill Manufacturing on Cutting Edge Quality and Wear Behavior

2021 ◽  
Vol 5 (3) ◽  
pp. 77
Author(s):  
Berend Denkena ◽  
Alexander Krödel-Worbes ◽  
Sascha Beblein ◽  
Markus Hein
Keyword(s):  
Wear Behavior ◽  
Cutting Edge ◽  
End Mills ◽  
Edge Quality ◽  
Manufacturing Process Chain ◽  
The Individual ◽  
Application Specific ◽  
Milling Tools ◽  
Edge Preparation

One of the decisive factors for the performance of milling tools is the quality of the cutting edge. The latter results from the process control of the individual steps along the tool manufacturing process chain, which generally includes the sintering or pressing of the blanks, grinding, cutting edge preparation, and coating of the tools. However, the targeted and application-specific design of the process steps in terms of high economic efficiency is currently limited by a lack of knowledge regarding the influence of the corresponding process parameters on the resulting cutting edge quality. In addition, there is a lack of suitable parameters that adequately represent the characteristics of the cutting edge microtopography. This publication therefore investigates the influence of manufacturing processes on cutting edge quality and wear behavior of end mills. On this basis, different characterization parameters for the cutting edge quality are derived and evaluated with regard to their ability to predict the wear behavior.

scholarly journals Cutting Performance of Different Coated Micro End Mills in Machining of Ti-6Al-4V

Micromachines ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 568 ◽  
Author(s):  
Zhiqiang Liang ◽  
Peng Gao ◽  
Xibin Wang ◽  
Shidi Li ◽  
Tianfeng Zhou ◽  
...  
Keyword(s):  
Tool Wear ◽  
Cutting Edge ◽  
Micro Milling ◽  
End Mill ◽  
Coating Materials ◽  
Edge Chipping ◽  
Workpiece Surface ◽  
Micro End Mill ◽  
End Mills ◽  
Flank Surface

Tool wear is a significant issue for the application of micro end mills. This can be significantly improved by coating materials on tool surfaces. This paper investigates the effects of different coating materials on tool wear in the micro milling of Ti-6Al-4V. A series of cutting experiments were conducted. The tool wear and workpiece surface morphology were investigated by analyzing the wear of the end flank surface and the total cutting edge. It was found that, without coating, serious tool wear and breakage occurred easily during milling. However, AlTiN-based and AlCrN-based coatings could highly reduce cutting edge chipping and flank wear. Specifically, The AlCrN-based coated mill presented less fracture resistance. For TiN coated micro end mill, only slight cutting edge chipping occurred. Compared with other types of tools, the AlTiN-based coated micro end mill could maximize tool life, bringing about an integrated cutting edges with the smallest surface roughness. In short, the AlTiN-based coating material is recommended for the micro end mill in the machining of Ti-6Al-4V.

scholarly journals The Role of AES and RC5 Algorithm: A Cryptosystem Model to Secure Information in the Image based Steganography along with Watermarking

Webology ◽  
2021 ◽  
Vol 18 (05) ◽  
pp. 1158-1167
Author(s):  
Jagadeesan S ◽  
Mani C ◽  
Sambasivam S ◽  
Jaisankar P ◽  
Sasikala S
Keyword(s):  
Personal Information ◽  
New Technology ◽  
Cutting Edge ◽  
New Method ◽  
Know How ◽  
Secure Information ◽  
Information Confidentiality ◽  
Textual Content ◽  
As If

In the brand new technology of cutting-edge technological know-how and era is advanced day via way of means of day. The information confidentiality is danger everywhere in the global and it will increase rapidly. Steganography and cryptography are very vital strategies applied in facts safety to cowl and steady mystery messages in transmitting facts. In this we launch, put in force and check a completely sole technique that can be used as a steady and extraordinarily budget friendly technique {of facts|of knowledge|} interest in addition to information extracting (Jagadeesan, S., 2020). Some efficiency parameters are going to be thru an test received and in comparison with opportunity current approaches parameters to show the efficiency of the deliberate technique. Here we proposes a brand new method to hiding the information the use of steganography strategies primarily based totally on AES and RC5 set of rules cryptosystem. The word Steganography is the splendor of hiding mystery information in the back of the photos, videos, sound and textual content to cowl the name of the game communication. Cryptosystem is the system which given our technique extra perfection. The visible first-class of the quilt photo certainly nice, nobody can consider it how personal information are transmitted the use of this technique. This suggest technique and set of rules ability is exceedingly bendy than different posted set of rules. The AES and RC5 set of rules has no more difficulty and it looks as if thoroughly to hiding the personal information.

scholarly journals Mechanics and Dynamics of Serrated End Mills

Manufacturing ◽  
2002 ◽  
Author(s):  
S. Doruk Merdol ◽  
Yusuf Altintas
Keyword(s):  
Time Domain ◽  
Cutting Forces ◽  
Chip Thickness ◽  
Cutting Edge ◽  
Chatter Stability ◽  
Edge Point ◽  
Oblique Cutting ◽  
Edge Geometry ◽  
End Mills ◽  
Chatter Stability Lobes

Mechanics and dynamics of serrated milling cutters are presented in the article. The serrated flute design knots are fitted to a cubic spline, which is then projected on helical flutes. Cutting edge geometry at any point along the serrated flute is represented by its immersion angle and tangent vectors in radial, tangential and helix directions. The chip thickness removed by each cutting edge point is determined by using previously proposed exact kinematics of dynamic milling. The cutting forces are evaluated by orthogonal to oblique cutting mechanics transformation. The experimentally proven model is able to predict the cutting forces and chatter stability lobes in time domain.

Geophysics Bright Spots

2020 ◽  
Vol 39 (3) ◽  
pp. 212-213
Author(s):  
Jyoti Behura
Keyword(s):  
Data Processing ◽  
Seismic Data ◽  
Cutting Edge ◽  
New Method ◽  
Seismic Data Processing ◽  
Light Bulb ◽  
Colorado School ◽  
Bright Spots ◽  
Outside The Box

Welcome to a new collection of Geophysics Bright Spots. I remember reading the first Bright Spots column as a student at Colorado School of Mines. Steve Hill, who conceived the wonderful idea of initiating this column, was my instructor there for a course on seismic data processing. He is a brilliant teacher — always challenging his students to think outside the box and ever open to discussions and debates. Through this column, he exposed readers to cutting-edge research in the field of geophysics while providing a new and important platform for authors to reach industry practitioners. Below is a list of research the editors found interesting in the latest issue of Geophysics. If any of them pique your interest, please read the full Geophysics article. Maybe a light bulb will go off in your head for a new method or algorithm.

Development of a New Burnishing Method Utilizing a Flank Face of a Turning Tool and its Burnishing Performance

2016 ◽  
Vol 1136 ◽  
pp. 227-232 ◽  
Author(s):  
Manabu Iwai ◽  
Hideaki Hashimoto ◽  
Kiyoshi Suzuki
Keyword(s):  
Surface Roughness ◽  
Carbon Steel ◽  
Dimensional Accuracy ◽  
Cutting Edge ◽  
New Method ◽  
Feed Control ◽  
Accuracy Level ◽  
Burnishing Process ◽  
Flank Face

As a measure to perform a burnishing process easily on an NC lathe, the authors propose a new method using a flank face positioned in a few millimeters lower part of the nose cutting edge of a tool. In the experiment, giving a fixed depth of burnishing (t=1, 2 and 4μm/pass), the carbon steel workpiece (S45C) of φ30mm which had been turned at V=200m/min and f=0.15mm/rev was burnished by predefined number of times. As a result, the surface roughness improved in nearly proportion to the total depth of burnishing and the roughness value of Rz≈10μm measured after turning could be improved to Rz≈2.5μm. Utilizing the feed control with an accuracy level of micron meters of the NC lathe, an attempt to control the dimensional accuracy of the workpiece diameter in the order of micron meters was also made. As a result, the workpiece radius came down constantly by 0.6~0.8 times in proportion to the tool depth of burnishing (t=1μm/pass), which reveals that the dimensional accuracy of the workpiece diameter could be controlled by the proposed burnishing process utilizing a fixed depth of burnishing system. Using the same burnishing process, circularity of the workpiece Δr could be improved to Δr≈2μm from Δr≈4μm measured after turning.

Cut-Forming: A New Method of Producing Wire

1977 ◽  
Vol 99 (1) ◽  
pp. 225-228 ◽  
Author(s):  
T. Hoshi ◽  
M. C. Shaw
Keyword(s):  
Cutting Force ◽  
Cutting Tool ◽  
Cutting Edge ◽  
New Method ◽  
Round Wire

A new method of making wire is discussed in which cutting and forming are combined into one process. A chip is first obtained by cutting a billet using a specially designed cutting tool. This chip immediately enters a circular die adjacent to the cutting edge of the tool and is forced past the orifice of the die by the cutting force. The chip leaving the orifice is in the form of a perfectly round wire.

scholarly journals METHOD FOR CALCULATING CUTTING FORCES BY MODELING CAD WITH A SYSTEM OF GEOMETRIC CUTTING PARAMETERS WITH RADIAL MILLS

2021 ◽  
pp. 50-57
Author(s):  
Alexander Leshchenko
Keyword(s):  
Cutting Forces ◽  
Tool Path ◽  
Cutting Parameters ◽  
Cutting Edge ◽  
Software Module ◽  
Power Characteristics ◽  
Cad System ◽  
Shaping Process ◽  
End Mills ◽  
Processing Zone

The accuracy of processing surfaces of a complex profile largely depends on the selected processing strategy, which will allow creating the same, within certain limits, power characteristics of the shaping process at the intervals of the programmed tool path. In this case, it becomes possible to include tuning modules in programs for CNC machines that form vector values of corrections in certain areas, as reactors for elastic deformations of the cutting process. Therefore, it is especially important to know the modulus and direction of the resulting cutting force vector, which does not necessarily coincide with the feed direction. The purpose of this work is to build a method for calculating cutting forces by modeling the geometric parameters of a cut with a CAD system, a cutter with a nonlinear generatrix. Solid modeling of the process is based on the Boolean operations of "intersection" and "subtraction" of 3D objects: the teeth of a radius cutter with a helical cutting edge and a workpiece "moving" at a feed rate. The tool for the implementation of this method is a software module created on the basis of API functions, the input data for which are: a 3D tool and a workpiece, the equation of the trajectory of its movement and the parameters of the infeed movement. Targeting API properties, the application makes it possible to simulate various trajectories, helical or trochoidal, when machining complex surfaces. In the future, it is possible to take into account the plastic deformation processes in the chip formation zone in the model by connecting external modules. In the course of the conducted research on milling with radial end mills with a helical cutting edge, when two or more teeth are within the arc of contact, it was determined by 3D modeling how much thickness and width the layer cuts off each of the teeth during the feed per revolution. Consequently, in the process of shaping, normal and tangential cutting forces, which are different in direction and modulus, are present as a function of the angle of rotation of the cutter. Therefore, the concept of "circumferential force on the cutter", accepted in the theory of cutting, as a certain constant component of the process, can introduce an error when considering the causes of the excitation mechanism of vibrations of different nature that arise in the processing zone.

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