Damping in machine tool structures

one-day conference at the Machine Tool Industry Research Association, Macclesfield, Wednesday, 30th April, 1969.
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Machine Tool Industry Research Association , Macclesfield
ContributionsMachine Tool Industry Research Association.
ID Numbers
Open LibraryOL14154239M

Damping Enhancement Techniques. References. Chapter 8 Use of “Managed Stiffness” in Design. Cutting Edge/Machine Tool Structure Interface. Stiffness of Clamping Devices. Modular Tooling.

Tool/Machine Interfaces. Damping in machine tool structures book Connections. Benefits of Intentional Stiffness Reduction in Design Components. Topics covered range from static and dynamic stiffness to chatter in metal cutting, stability in machine tools, and deformations of machine tool structures.

This volume is divided into three sections and opens with a discussion on stiffness specifications and the effect of stiffness on the behavior of the machine under forced vibration conditions. Purchase Machine Tool Structures - 1st Edition.

Print Book & E-Book. ISBNBook Edition: 1. This is to certify that the thesis entitled, “DAMPING OF MACHINE TOOL STRUCTURES WITH RIVETED JOINTS” submitted by Mr.

Pavan Kumar Vodnala in partial fulfillment of the requirements for the award of Master of Technology degree in Mechanical Engineering with specialization in roductionP Engineering during session at the National Institute of. This paper considers a passive damping method that can be applied to beam-like structures such as machine tool bases and columns.

The method uses viscoelastic materials to dissipate energy in the manner of classic constrained-layer damping; however, the layers are embedded within the structure as opposed to being applied by: The damping values in the tables should be used with caution. There are many types of damping, such as viscous, hysteresis, acoustic coupling, air pumping at joints, energy radiation to the soil, etc.

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Also, boundaries and bearings contribute damping. Furthermore, structures have many modes. Each mode may have a unique damping value. References. ME EN – Precision Machine Design – Design of Machine Structures Dynamic Stiffness (contd.) It takes a lot of damping to reduce the amplification factor Amplification factor (output/input) to a low level.

Source: Alexander Slocum, Precision Machine Design ME EN – Precision Machine Design – Design of Machine Structures For example, Chang and colleag22 and Lee et al. 23 used composite materials in the design of machine tool structures in an attempt to improve structural damping of machine tool structures.

The composite materials was constituted by adhesively bonding glass fiber reinforced epoxy composite plates to a cast iron structure such as the.

An analysis of dynamic properties of such a machine tool body [3][4][5][6] showed "the higher damping capacity of the polymer concrete with respect to the grey cast iron within the frequency range.

•Cutting tool –shape, material, coatings, condition •Machine tool –design, stiffness & damping, structure •Fixture –workpiece holding devices •Cutting parameters –speed, feed, depth of cut Independent variables.

The machine tool structure is required to be rigid in order to remove the undesirable vibration and to improve the work piece quality. The most conventional material used in machine tool structure is cast iron which has both stiffness and dynamic characteristics to perform at varying speeds. The objective of this work is to improve damping.

The frame structure of a machine tool is an essential functional component inside the machining system. Main tasks of machine structures are the assurance of the geometric configuration of the machine elements even under static, dynamic and thermal loads, as well as the absorption and guiding of forces and torques.

Also described is ‘epoxy concrete’, a new material specifi- cally developed for high precision machine tool structures, with high damping, high specific stiffness and high dimensional stability.

Using patented moulding techniques, structures are finish cast to a high precision at low cost. The structural design of machine tool parts requires high rigidity, thermal stability, and damping. In general, the dimensions of machine tools are overestimated to minimize static and dynamic deformations during machining.

The general design of machine tool structures will not be covered in. In addition, updated topics include machine tool types and structures, cutting tool materials and coatings, cutting mechanics and temperatures, process simulation and analysis, and tool wear from both chemical and mechanical viewpoints.

Comprised of 17 chapters, this detailed study:Reviews: 1. Damping and vibration control. Damping is essential for vibration control in construction. With a high loss factor, cork is an excellent damping tool, boosting security and comfort in buildings and infrastructures. What is damping.

Damping is the dissipation of vibratory energy in solid mediums and structures over time and distance. High damping is desirable to attain low vibration and noise levels whereas low damping is desirable for increased sensitivity in sensors and certain precision instrumentation.

Damping is most obvious at resonance where the stiffness and inertia forces become equal. As a result, damping is a key factor in predicting vibration response of structures.

Malcolm J. Crocker, PhD, is Distinguished University Professor in the Mechanical Engineering Department of Auburn University, where he teaches and conducts research, sponsored by industry and government, in acoustics, noise, and vibration control.

Crocker served for twenty years as the Editor of the Noise Control Engineering Journal and is currently Editor of the International.

Description Damping in machine tool structures FB2

The two functional requirements of machine tool bed for machine tools are high structural stiffness and high damping, which cannot be satisfied simultaneously if conventional metallic materials. Abstract: The purpose of this study is to acquire design method of machine tools with higher dynamic stiffness and consequently higher chatter stability.

This study focuses on stiffness of main structures and friction damping in guide of a machine tool, because stiffness and friction damping are considered to have major influence on the dynamic.

Virtual prototypes, e.g., finite element models, are commonly used to reduce the development times of a new machine tool generation. However, the accuracy of these models is often limited by their representation of damping effects and the possibility to efficiently simulate the dynamic behavior in different axis positions.

An approach for measuring the FRF of machine tool structure without knowing any input force International Journal of Machine Tools and Manufacture, Vol. 86 A frequency domain interpolation method for damping ratio estimation. Vibration control in machine tool.

The vibration behaviour of a machine tool can be improved by. A reduction of the Intensity of the sources of vibration. By enhancement of the effective static stiffness and damping. By appropriate choice of cutting regimes, tool design, and work-piece design. Damping characteristics of machine structures assembled by bonding: a beam in which two steel strips are partially joined by an adhesive Journal of Adhesion Science and Technology, Vol.

14, No. 11 SHEAR AND NORMAL STRAIN EFFECTS OF CORE LAYERS IN VIBRATION OF SQUARE SANDWICH PLATES UNDER CLAMPED BOUNDARY CONDITIONS. Machine tool vibrations and their adverse effects 1 Main objective of the research work 1 Chapter 2 Literature Review Introduction Introduction to machine tools 2 Damping overview 3 Review on Research done in Damping of Composite materials 4 Review of the previous work done on the machine tool structures 6.

Title: Microsoft PowerPoint - 12_Structure Design of the Author: Book_Room Created Date: 9/26/ AM. Structural dynamics is the study of how structures respond when subjected to applied loads. Many times, in one form or another, the modal characteristics of the structure is used to • Damping generally ignored Advantages Disadvantages.

Mechanical Vibrations - Experimental Modal Analysis 6 Dr. Peter Avitabile. Kim and Chang [1] developed carbon/epoxy composite-aluminum hybrid structures with friction layers on the column and spindle holders to increase structural damping of machine tool.

The composite-aluminum hybrid spindle holder employing a friction layer has more than % increment of damping capacity than the original spindle holder. Machine Foundation is subjected to dynamic loads.

These loads develop the vibratory motions which will transmit into the soil below the foundation. The effect on soil caused by these vibrations is analyzed using principles of soil dynamics and theory of vibrations.

Contents:Types of Vibrations in Machine FoundationFree Vibration in Machine FoundationForced Vibration in Machine. Importance of Tools and Equipment Proper tools and equipment are essential for the effective operation of any civil works site.

Equipping the construction site with the correct tools and equipment plays an essential role in achieving timely and good quality results. For every construction activity there is.

Eric R Marsh,"Dynamic analysis of machine tools" P. A. Scagnetti, Eric R Marsh, N. D. Staedke and A. H. Slocum,"Shear damping of advanced ceramic structures", pp. P. A. Scagnetti, Eric R Marsh and N. D. Staedke,"A new method for improving dynamic stiffness of advanced ceramic structures", pp.

International Journal of Machine Tool and Manufacturing, 28 (2)–, [4] Y., Altintas.

Details Damping in machine tool structures PDF

Prediction of cutting forces and tool breakage in milling from feed drive current measurements.• Check for resonance on various machinery. • Estimate damping and displacement. • Record and save results to your device. • Aid design and validation of isolator mounts.

• Adjust delay and total time of recording to suit your application. Disclaimer - Use of the Resonance Vibration Tool Analysis app .