Schwingungsüberlagerte Kreissägewerkzeuge/Ultrasonic-assisted circular sawing

2020 ◽  
Vol 110 (01-02) ◽  
pp. 45-49
Author(s):  
Michael Raab ◽  
Christoph Birenbaum ◽  
Michael Stroka
Keyword(s):  
Cutting Tools ◽  
Cutting Process ◽  
Ultrasonic Vibrations ◽  
Vibration Behavior ◽  
Circular Saw ◽  
Ultrasonic Assisted ◽  
Circular Sawing

Der Beitrag beschreibt einen Ansatz zur simulationsgestützten Nachbildung des Schwingverhaltens dünner scheibenförmiger Werkzeuge bei hochfrequenten Wechselschwingungen. Der Ansatz wurde primär für Kreissägewerkzeuge entwickelt, um diese bereits in der Konzeptphase so zu gestalten, dass diese sich für die ultraschallüberlagerte Zerspanung bei bis zu 20 kHz einsetzen lassen.   This article describes a model which helps to recreate the vibration-behavior of thin circular-shaped cutting tools influenced by ultrasonic vibrations. The model is primarily developed for the conception of circular saw-blades to support the geometric adaption for the ultrasonic-assisted-cutting process (UAC) at 20 kHz.

scholarly journals Analysis a cutting edge geometry influence on circular saw teeth at the process of crosscutting wood

2009 ◽  
Vol 57 (5) ◽  
pp. 177-182 ◽  
Author(s):  
Ján Kováč ◽  
Milan Mikleš
Keyword(s):  
Cutting Tools ◽  
Measurement Procedure ◽  
Cutting Edge ◽  
Production Costs ◽  
Cutting Process ◽  
Detailed Measurement ◽  
Edge Geometry ◽  
Circular Saw ◽  
Measuring Devices ◽  
Circular Saws

Nowadays, the wood cutting process looks like a technological scheme consisting of several connected and relatively inseparable parts. The crosscutting wood is the most widespread in the process of fo­rest exploitation; it is used at tree exploitation, shortening stems and assortment production. The article deals with the influence of the cutting edge geometry of circular saws on the torque and also on the cutting performance at the crosscutting wood therefore there is the influence on the whole cutting process. In the article there is described detailed measurement procedure, used measuring devices and the process of results analysis. Knowledge of wood crosscutting process and choice of suitable cutting conditions and cutting tools will contribute to decrease production costs and energy saving.

scholarly journals Ultrasound Effect on the Microstructure and Hardness of AlMg3 Alloy under Upsetting

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1010
Author(s):  
Przemysław Snopiński ◽  
Tibor Donič ◽  
Tomasz Tański ◽  
Krzysztof Matus ◽  
Branislav Hadzima ◽  
...  
Keyword(s):  
Flow Stress ◽  
Ultrasonic Vibration ◽  
Light And Electron Microscopy ◽  
Load Flow ◽  
Forming Limit ◽  
Ultrasonic Vibrations ◽  
Softening Effect ◽  
Simultaneous Application ◽  
Ultrasonic Assisted ◽  
Acoustic Softening

To date, numerous investigations have shown the beneficial effect of ultrasonic vibration-assisted forming technology due to its influence on the forming load, flow stress, friction condition reduction and the increase of the metal forming limit. Although the immediate occurring force and mean stress reduction are known phenomena, the underlying effects of ultrasonic-based material softening remain an object of current research. Therefore, in this article, we investigate the effect of upsetting with and without the ultrasonic vibrations (USV) on the evolution of the microstructure, stress relaxation and hardness of the AlMg3 aluminum alloy. To understand the process physics, after the UAC (ultrasonic assisted compression), the microstructures of the samples were analyzed by light and electron microscopy, including the orientation imaging via electron backscatter diffraction. According to the test result, it is found that ultrasonic vibration can reduce flow stress during the ultrasonic-assisted compression (UAC) process for the investigated aluminum–magnesium alloy due to the acoustic softening effect. By comparing the microstructures of samples compressed with and without simultaneous application of ultrasonic vibrations, the enhanced shear banding and grain rotation were found to be responsible for grain refinement enhancement. The coupled action of the ultrasonic vibrations and plastic deformation decreased the grains of AlMg3 alloy from ~270 μm to ~1.52 μm, which has resulted in a hardness enhancement of UAC processed sample to about 117 HV.

Numerical Simulation of Plunge Force During the Plunge Phase of Friction Stir Welding and Ultrasonic Assisted FSW

2008 ◽  
Author(s):  
Kwanghyun Park ◽  
Bongsuk Kim ◽  
Jun Ni
Keyword(s):  
Numerical Simulation ◽  
Friction Stir Welding ◽  
High Frequency ◽  
Hybrid Welding ◽  
Ultrasonic Vibrations ◽  
Welding Quality ◽  
Friction Stir ◽  
Ultrasonic Assisted ◽  
Welding Force ◽  
Welding Technique

Ultrasonic assisted friction stir welding (UaFSW) is an hybrid welding technique, where high frequency vibration is superimposed on the movement of a rotating tool. The benefit of using ultrasonic vibration in the FSW process refers to the reduction in the welding force and to the better welding quality. The UaFSW system is being developed and its mechanism needs to be understood using both the experiments and the numerical simulations. In this paper, FE simulations of FSW and UaFSW using ABAQUS/Explicit were carried out to examine plunge forces during the plunge phase of FSW and UaFSW, respectively. First, the simulations of the conventional FSW process were validated. Then, simulation of UaFSW process was performed by imposing sinusoidal horizontal ultrasonic vibrations on the tool.

scholarly journals Dispositivos De Interrupcion Subia (Dis) Para El Analisis De Raices Viruta

2014 ◽  
Vol 2 (2) ◽  
Author(s):  
Diego Alejandro Neira Moreno
Keyword(s):  
Cutting Tool ◽  
Cutting Tools ◽  
Scientific Research ◽  
Cutting Process ◽  
Work Piece ◽  
Mechanical Forces ◽  
Machining Processes ◽  
Research Instrument ◽  
Machined Parts ◽  
Interaction Phenomena

El estudio de las variables y efectos derivados del mecanizado provee herramientas de conocimiento tendientes a optimizar el uso de las herramientas y los procedimientos de maquinado industrial. Este artículo de reflexión aborda el uso de los dispositivos de interrupción súbita (DIS) como herramientas de obtención de raíces de viruta para la investigación científica del mecanizado industrial, y para el estudio de los efectos derivados de la interacción entre las herramientas de corte y el material de trabajo, en función de los cambios microestructurales del material de trabajo, dependientes de la temperatura producida y los esfuerzos mecánicos de la herramienta de corte durante el mecanizado. Mediante la reflexión se destaca la importancia de los DIS como instrumentos de investigación científica en la manufactura, ya que estos permiten obtener muestras de viruta para estudiar las variables incidentes en el maquinado y a partir de esta evidencia, proponer alternativas para optimizar la fabricación de piezas y la integridad de las herramientas empleadas en el proceso.AbstractThe study of the variables and effects derived from the machining processes brings the knowledge needed to optimize the use of machining tools and procedures. This article is an opinion piece about the use of quick stop devices (QSD) as a scientific research instrument in machining projects to obtain chip roots, to study the interaction phenomena between cutting tool and work piece material that depends on temperature and the mechanical forces produced by the cutting tool during the cutting process. This article deals about how important the QSD are as a research instruments in manufacture because with this instruments it is possible to analyze the machining variables, based on the evidences bring by the chip roots obtained with the instrument. It is possible to propose optimization alternatives in the manufacture of machined parts and the integrity of cutting tools.

scholarly journals THE IMPACT OF THE RESULTS OF PRODUCTION TESTS OF CARBIDE CUTTING TOOLS HARDENED BY A MAGNETIC-PULSE TREATMENT ON INCREASING THE EFFICIENCY OF THE TECHNOLOGICAL CUTTING PROCESS

2018 ◽  
Vol 0 (4 (6)) ◽  
pp. 84-92
Author(s):  
Максим Валерійович Шаповалов ◽  
Віктор Дмитрович Ковальов ◽  
Яна Василівна Васильченко
Keyword(s):  
Cutting Tools ◽  
Cutting Process ◽  
Magnetic Pulse ◽  
Pulse Treatment ◽  
The Impact

scholarly journals Considerations regarding the use of cryogenic cooling in metal cutting as an alternative to conventional cooling – brief review

2018 ◽  
Vol 178 ◽  
pp. 03014
Author(s):  
Ana Maria Bocăneţ ◽  
Cristian Croitoru
Keyword(s):  
Process Parameters ◽  
Metal Cutting ◽  
Cutting Tools ◽  
Green Manufacturing ◽  
Cryogenic Cooling ◽  
Cutting Process ◽  
Cooling Method ◽  
Conventional Cooling ◽  
Industrial Solutions

This paper presents a study regarding the latest researches on cryogenic cooling used in metal cutting as an opportunity for achieving green manufacturing, in terms of cryogenic methods, cutting tools, effects on cutting process parameters, industrial solutions and some possible applications in the areas where this cooling method presents deficiencies.

Experimental Investigation of Chip Formation and Surface Topology in Ultrasonic-Assisted Milling of X20Cr13 Stainless Steel

2013 ◽  
Author(s):  
M. Mahdi Abootorabi Zarchi ◽  
M. R. Razfar ◽  
A. Abdullah
Keyword(s):  
Stainless Steel ◽  
Chip Formation ◽  
Milling Process ◽  
Surface Topology ◽  
Ultrasonic Vibrations ◽  
Machined Surface ◽  
Side Milling ◽  
One Dimensional ◽  
Digital Microscope ◽  
Ultrasonic Assisted

In the present paper, by using longitudinal one dimensional ultrasonic vibrations, characteristics of side milling of X20Cr13 martensitic stainless steel has been investigated. In order to experimentally investigate the chip formation and machined surface topology of workpiece, conventional milling (CM) and ultrasonic-assisted milling (UAM) processes have been applied and compared in certain cutting conditions. Imaging by digital microscope shows that applying ultrasonic vibrations on milling process leads to thinner and smaller formed chips and it also makes machined surface of workpece flatter. In both CM and UAM processes, as feed rate increases, chips become thicker and machine surface loses its flatness.

Improving Productivity in an Ultrasonic-Assisted Drilling Vertical Machining Center

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
M. A. Moghaddas ◽  
M. A. Short ◽  
N. R. Wiley ◽  
A. Y. Yi ◽  
K. F. Graff
Keyword(s):  
Ultrasonic Vibrations ◽  
Machining Processes ◽  
Machining Center ◽  
Ultrasonic Drilling ◽  
Standard Tool ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Machining ◽  
Conventional Machine ◽  
Solid Foundation ◽  
Sufficient Strength

Ultrasonic-assisted machining, which is the application of ultrasonic vibrations to standard or “conventional” machine tools for processes such as drilling, milling, and turning, is a rapidly developing technology aimed at increasing the productivity of machining processes. While a solid foundation is being established through laboratory-based research studies, typically these processes have not yet progressed to fulfill the demanding requirements of the factory floor. The objective of the current work is to transition the ultrasonic-assisted drilling (UAD) process from the laboratory to a production system compatible with automated machining systems. This work details the design and development of an ultrasonic drilling module that has sufficient strength, stiffness, and accuracy for production demands, while maintaining powerful levels of ultrasonic vibrations that result in lowered drilling forces and faster feed rates. In addition, this work will review prior work in UAD, including the development of a module based on a vibration-isolating case using a standard tool holder. Performance of the system is shown to provide thrust force reductions, while maintaining or improving surface finish and drilling accuracy. The results from drilling several materials are presented.

Influence of Reground Tool Sharpness on Micro-Cutting Process

2010 ◽  
Vol 37-38 ◽  
pp. 550-553
Author(s):  
Xin Li Tian ◽  
Zhao Li ◽  
Xiu Jian Tang ◽  
Fang Guo ◽  
Ai Bing Yu
Keyword(s):  
Cutting Forces ◽  
Orthogonal Cutting ◽  
Cutting Tools ◽  
Chip Thickness ◽  
Cutting Edge ◽  
Cutting Process ◽  
Micro Cutting ◽  
Temperature Distributions ◽  
Edge Radius ◽  
1045 Steel

Tool edge radius has obvious influences on micro-cutting process. It considers the ratio of the cutting edge radius and the uncut chip thickness as the relative tool sharpness (RST). FEM simulations of orthogonal cutting processes were studied with dynamics explicit ALE method. AISI 1045 steel was chosen for workpiece, and cemented carbide was chosen for cutting tool. Sixteen cutting edges with different RTS values were chosen for analysis. Cutting forces and temperature distributions were calculated for carbide cutting tools with these RTS values. Cutting edge with a small RTS obtains large cutting forces. Ploughing force tend to sharply increase when the RTS of the cutting edge is small. Cutting edge with a reasonable RTS reduces the heat generation and presents reasonable temperature distributions, which is beneficial to cutting life. The force and temperature distributions demonstrate that there is a reasonable RTS range for the cutting edge.

Sign in / Sign up

Export Citation Format

Share Document