Machine tool variation
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The document discusses machine tool vibration and chatter. It defines chatter as a self-excited vibration induced and maintained by forces from the cutting process, which affects surface finish, tool life, production rate, and causes noise. Chatter resistance is characterized by the maximum stable depth of cut without causing vibration. The vibration behavior of a machine tool can be improved by reducing vibration sources, choosing appropriate cutting regimes, tool and workpiece design, and enhancing static stiffness and damping.
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Surface topography assessment techniques based on an in-process monitoring approach of tool wear and cutting force signature IRJET- Development of Actively Tuned Vibration Absorber for Washing Machine
This document describes research into developing an actively tuned vibration absorber for washing machines. It begins with background on vibration absorbers and how they work by adding an extra mass-spring-damper system to reduce vibrations. The researchers aim to create a vibration absorber that can retune itself in response to changing excitation frequencies. They model a washing machine drum in CAD software and conduct modal and harmonic analyses in ANSYS to determine natural frequencies and vibration responses. Calculations are shown for selecting absorber mass and spring properties to match the drum's natural frequency range during spinning. The absorber is modelled attached to the washing machine for further analysis. The research aims to reduce washing machine vibrations through an integrated, self-tuning absor
Tool Wear and Tool life of single point cutting tool
Tool wear occurs gradually as material is removed from cutting tools during operation. The three main types of tool wear are flank wear, crater wear, and nose wear. Flank wear increases cutting forces and can cause tool failure if it exceeds 0.5-0.6mm. Crater wear increases the rake angle but weakens the tool. Nose wear shortens the tool and reduces machining accuracy. Factors like cutting speed, depth of cut, tool material, and work material affect the tool's life, which is the length of satisfactory operation before needing replacement due to wear.
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Machine tool variation
- 1. IMS ENGINEERING COLLEGE ,GHAZIABAD (U.P) Department of Mechanical Engineering TOPIC:- MACHINE TOOL VIBRATION Submitted by :- Ambesh kumar Roll no. 1214340021 Batch :-ME-1 (2012-2016)
- 3. MACHINE-TOOL CHATTER Chatter is a self-excited vibration which is induced and maintained by forces generated by the cutting process. It effects surface finish, tool life, production rate and also produce noise. Chatter resistance of a machine tool is usually characterized by a maximum stable (i.e., not causing chatter vibration) depth of cut
- 4. Machine-tool chatter is essentially a problem of dynamic stability. A machine tool under vibration-free cutting conditions may be regarded as a dynamical system in steady-state motion. Systems of this kind may become dynamically unstable and break into oscillation around the steady motion Vibration control in machine tool The vibration behaviour of a machine tool can be improved by :
- 5. A reduction of the Intensity of the sources of vibration. By appropriate choice of cutting regimes, tool design, and work-piece design. By enhancement of the effective static stiffness and damping. By appropriate choice of cutting regimes, tool design, and work-piece design.
- 6. Abatement of the sources is important mainly for forced vibrations. Stiffness and damping are important for both forced and self excited (chatter) vibrations. Both parameters, especially stiffness, are critical for accuracy of machine tools, stiffness by reducing structural deformations from the cutting forces, and damping by accelerating the decay of transient vibrations.