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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Chip formation"”.
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Experimental and Theoretical Aspects of High Speed Chip Formation in Metals
Made available in DSpace on 2014-12-05T19:16:01Z (GMT). No. of bitstreams: 1 6202987.pdf: 3438962 bytes, checksum: 83ecc6c8a41a784ae194cc901fa55f82 (MD5) Previous issue date: 1962
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Dynamics of Orthogonal Chip Formation With Constant Energy Input (Appliedto 65/35 Brass, t.p.e. Copper and 6061-T6 Aluminum)
Made available in DSpace on 2014-12-10T22:48:10Z (GMT). No. of bitstreams: 1 7114911.pdf: 4168702 bytes, checksum: 86db5157f8b2097c017e59e120e00727 (MD5) Previous issue date: 1970
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Microstructure -Level Machining Modeling of Ferrous Alloys
… conducted of the three materials. The measured chip morphology and machining forces were compared with the model predictions, and a good correlation between them was found. In addition, the microstructure-level model explained chip formation mechanisms and relationship between chip formation and …
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A generalized approach for mechanics of chip formation in steady-state and dynamic orthogonal metal cutting using a new model of shear zone with parallel boundaries and its validation to cutting-forces prediction in self-piloting machining
… presents a novel approach to the mechanics of chip formation based on a shear zone model with parallel boundaries that has been developed by applying the continuum mechanics to the analysis of the chip formation process. Such a model is formulated without imposing the assumptions commonly made …
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Orthogonal cutting of titanium alloys
A method, based on experimental information, of relating the energy required for the orthogonal cutting of titanium alloys with the chip geometry and the mechanical properties of the material, is discussed. The solution is obtained from the extension of the apparent strain analysis of orthogonal …
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The effect of tooth geometry on power hacksaw blade performance.
… The author proposes that restriction of chip flow by the gullet causes very inefficient metal removal. This is supported by examination of hacksaw chips, and a theoretical model has been developed to show how rapidly cutting forces increase when the chip is restricted from flowing. Two …
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A finite element study of the mechanics of micro-groove machining of 4340 steel
… study on gathering the cutting performance information such as temperature, stress, and chip formation for the purpose of process improvements. Therefore, a 3D Finite Element (FE) model was developed to study the microgroove cutting process. However, the frictional heat has not been considered …
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Development of a high-speed high-precision micro-groove cutting process
A high-speed, high-precision chip formation-based micro-groove cutting process has been developed for cutting grooves in metals with nearly arbitrarily shaped cross-sections, which have widths and depths of a few hundred nanometers to a few microns, and lengths of tens of millimeters. A flexible …
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The mechanics of power hacksawing and the cutting action of blunt tools
… been undertaken. From the observations of the chip formation mechanism and measurements of the relative position of the tool and machined surface during cutting, some new light is thrown upon the ploughing process.</p> <p>A slip-line field is proposed which qualitatively represents the assumed …
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Experimental study of biomedical stainless steel 316l vibration assisted milling using retrofittable 1D UVAM worktable
… force, cutting temperature, surface roughness, chip formation and tool wear progression were compared between CM and UVAM. The results showed that a considerable improvement was identified in UVAM. It was found that end milling with ultrasonic vibration in the feed vibration of 18 kHz with an …
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Particleboard simulation model to improve machined surface quality
… surfaces in one area and defects such as edge chipping in nearby areas. This research examines methods of improving surface quality by examining PB characteristics and their interactions with the cutting tool. It also develops an analytical model and software tool that allows the effects of …
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Modeling and Interpretation of Fiber Orientation-Based Failure Mechanisms in Machining of Carbon Fiber-Reinforced Composites
… failure mechanisms occurring throughout the chip formation process. After development of the two machining models, the machining responses are compared to a set of machining experiments for validation purposes. ii Fibers orientated in the 45 and 90 degree orientations were found to fail in …
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Machining of additively manufactured titanium Ti-6Al-4V; cutting forces and chip morphology
… milling tests as an oblique cutting operation. Chip morphology has also been investigated to determine the mechanics of chip formation and its relationship to the properties of the AM titanium.
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On the Modeling and Analysis of Machining Performance in Microendmilling
… is then developed based on the minimum chip thickness concept. Two phenomena were found to combine to generate an optimal feedrate for the surface generation of single phase materials, the geometric effect of the tool and process geometry and the minimum chip thickness effect. The …
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Optimizing the economic efficiency by micro-drill life improvement during deep-hole drilling in the 212-Valve manufacturing process
… the short drill life. This thesis analyzed the chip formation and removal during the process to improve the tool life. The effects of the tool materials, geometry and peck drilling procedures were investigated. Based on these studies, a new micro drill bit, TYl 30, was selected from the …
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Numerical modeling of tool-rock interaction in laminated formations
… of the literature, a numerical model of the chip formation process in laminated rock formations has been developed. The model uses a finite element approach to simulate the anisotropic behavior of laminated rock formations. The finite element program has been developed with the assumption of …
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Tooling performance in micro milling: Modelling, simulation and experimental study
… tool stresses, tool temperatures, milling chip formation and temperatures have been comprehensively studied and compared for potential micro tool design and optimization purposes. In an effort to prolong the tool life and enhance the tooling efficiency, DLC and NCD coatings have been …
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Analytical model for force prediction when machining metal matrix composites
… ploughing force, and particle fracture force. Chip formation force was obtained by classical orthogonal metal cutting mechanics and the Johnson-Cook Equation. The ploughing force was formulated while the fracture force was calculated from the slip line field theory and the Griffith theory of …
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Analytical modeling and simulation of metal cutting forces for engineering alloys
In the current research, an analytical chip formation model and the methodology to determine material flow data have been developed. The efforts have been made to address work hardening and thermal softening effects and allow the material to flow continuously through an opened-up deformation zone. …
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The performance of ultra-hard cutting tool materials in maching aerospace alloy TA48
… a quick-stop technique was used to study chip formation and tool wear when cutting with carbides, CBN and PCD tools under nominally the same conditions.The predominant wear mechanisms for each of the tool materials was found to be based on a diffusion/dissolution process. The wear process …
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