timesaving surface machining processes

... Machining 1 1.3 Traditional Machining 5 1.3.1 Machining by cutting 5 1.3.2 Machining by abrasion 6 1.4 Nontraditional Machining 8 1.4.1 Single-action nontraditional machining 9 1.4.2 Hybrid machining ... removal. Machining processes that are based on the thermal machining action are described in Chap. 5. These include electrodischarge machining (EDM), laser beam machining (LBM), electron beam machining ... hybrid machining processes. The book is written in eight chapters: Chapter 1: Material Removal Processes Chapter 2: Mechanical Processes Chapter 3: Chemical Processes Chapter 4: Electrochemical Processes Chapter...

Ngày tải lên: 06/01/2014, 21:07

Ngày tải lên: 27/06/2014, 05:20

Ngày tải lên: 27/06/2014, 08:20

Ngày tải lên: 27/06/2014, 08:20

Ngày tải lên: 27/06/2014, 17:20

... 109 Isoparametric Machining Operation 120 Isoparametric Machining Operation: Introduction 121 Isoparametric Machining Operation: Strategy 122 Isoparametric Machining Operation: Geometry 124 Isoparametric Machining ... Code Create Machining Operations and simulate them 5 6 4 3 2 1 2 3 Student Notes: Surface Machining  Copyright DASSAULT SYSTEMES 57 Copyright DASSAULT SYSTEMES 3-Axis Machining ... for tool path computation : Machining Operations, Auxiliary Operations Machining Operation: A Machining Operation (or MO) contains all the necessary information for machining a part of a work...

Ngày tải lên: 29/03/2014, 11:20

... powder metallurgy paper concerning ‘secondary machining 1 , entitled: 1 ‘Secondary machining , is a term used to cover any additional post -machining operations (e.g. drilling, turning and ... insert’s passage over the surface can be metallographically-inspected and a micro- hardness ‘footprint’ across a tapered section can be undertaken, to see if any surface/ sub -surface modica- tions ... to have the facility to stop machining at a convenient point as desired, at the press of a button – giving a measure of control to the automated CNC machining processes. If a series of testpieces...

Ngày tải lên: 21/06/2014, 22:20

... problem. sual aspect of machined surfaces – wherein the real situation is that surface texture continuously degen- erates, and it is only the burnishing (i.e.‘ironing’) of the surface that ‘masks’ the ... established. e faced-o surface texture re- sults can then be superimposed onto the same graph – for a direct comparison of ank wear and for that of the machined surface texture parameter. ... facing-o secondary machining operation meant that aer 10 facing passes, a pre-programmed ‘optional stop’ can then be applied, to allow both tool ank wear and compact surface tex- ture to...

Ngày tải lên: 21/06/2014, 22:20

... calculations. Machinability and Surface Integrity  Figure 159. The generated errors produced when circular interpolating at high feedrates when high-speed machining. Machinability and Surface Integrity ... chatter in machining operations, with their machine tool damping characteristics.  Chapter  either entirely eliminating it, or at the very least, min- imising its aect on the overall machining ... chip width, acting as the feed-back gain 31 within the closed-loop cutting process, NB e machining processes ‘stability limit’ – be- ing the threshold between stable cutting and chat- ter –...

Ngày tải lên: 21/06/2014, 22:20

... production processes. Machinability and Surface Integrity  Figure 162. Anticipated process ‘roughness’ and their respective grades. [Source: ISO 1302, 2001].  Chapter  Figure 160. Surface ... of a surface tends to be either: anisotropic, or isotropic 44 in nature on a machined surface topog- raphy. When attempting to characterise the potential functional performance of a surface, ... (Dagnall, 1998). 44 ‘Anisotropic, or isotropic surfaces, either condition can be in- dividually represented on all machined surfaces. Anisotropy, refers to a surface topography having directional properties,...

Ngày tải lên: 21/06/2014, 22:20

... ‘Ternary manufacturing envelopes’ for the production processes of turning and boring, axes: feedrate, roundness and surface texture . Machinability and Surface Integrity  particular, the heat generated ... pro- duces an abraded surface that approaches the grit size of the abrasive medium. erefore, to the naked eye the insert’s surface looks smooth, but at the ‘micron- level’ of surface magnication ... process envelopes’. Machinability and Surface Integrity  a ‘saw-toothed prole’ to the hole’s surface, along with pores in the compact that are open to the ‘free -surface of the hole. e hole topography...

Ngày tải lên: 21/06/2014, 22:20

... coatings, minimise this BUE eect. If BUE does oc- cur, it can create a poor surface nish on the ma- chined surface. In any BUE machining condition, if it continues without attention, then the result ... action, promoted by either machining workpiece materials that may easily work-harden, so each successive longitudinal turning pass at the same D OC leads to the previous surface condition being ... insert’s edge. NB BUE machining data conditions have been reasonably well-dened, so fortunately, these re- spective cutting speeds can be avoided, particu- larly, as most CNC machining operations...

Ngày tải lên: 21/06/2014, 22:20

... . Machinability and Surface Integrity  costs can be calculated, for a simple turning operation: the method can be modied for machining centres and for most other machining operations. As ... oc- curs due to plasto-mechanical processes of crack formation and chip removal, in combination with surface friction. Any form of tool wear alters the contact surfaces between the tool and workpiece, ... Even though the lowest possible machining cost per component can be calculated with the most eco- nomical cutting speed, it is oen desirable to utilise a faster machining strategy. is increased...

Ngày tải lên: 21/06/2014, 22:20

... now be described. Computer Simulation of Machining Processes – an Introduction By the application of computers to simulate and anal- yse machining processes, this provides tool manufac- turers ... non-orthogonal (three-dimen- sional) machining processes, advances in tool geometries with their accompanying force and shear relationships and the advent of applications to machining opera- tions employing ... workpiece. Lagrangian FEA Simulation Machining Modelling In Fig. 183, just a few images of the Lagrangian FEA machining model are depicted for several applica- tions of machining operations. is simulation...

Ngày tải lên: 21/06/2014, 22:20

... discussing the machined surface condition in the following section. .. Residual Stresses in Machined Surfaces A machined surface is the product of either ‘abusive’ , or ‘gentle’ machining regimes, ... show the complexity of a machining operation, with the surface integrity grouping indicating for a turning operation the fol- lowing features: • Surface condition – surface texture and its associ- ated ... • Surface displacement – bulk transportation of ma- terial and residual stresses, • Surface/ sub -surface micro hardness – plastic de- formation and localised residual stress layers. Machined surfaces...

Ngày tải lên: 21/06/2014, 22:20

... transform the surface metallurgy by thermo-mechanical generation. e case has al- ready been made concerning the fact that machining processes impart residual stresses into the surface lay- ers, ... of Ma- chined Surfaces Produced by Plastic Deformation Mecha- nisms. WEAR, Vol. 109, 195–205, 1986. Griths, B.J. Manufacturing Surface Design and Monitor- ing for Performance. Surface Technology, ... increase in a surface material break-out and generation of debris, • Surface delamination and fatigue. Cracks may be considered as either separations, or narrow ruptures that interrupt the surface...

Ngày tải lên: 21/06/2014, 22:20

... (Cleveland, OH), 1938. Griths, B. Manufacturing Surface Technology – Surface In- tegrity and Functional Performance. Penton Press, 2001. Höganäs AB Pub. Machining Guidelines – Book 5. Sept., 1998. Higgins, ... Advanced Machining – e Handbook of Cut- ting Technology, IFS Pub./Springer Verlag, 1989. Smith G.T. CNC Machining Technology, Springer Verlag, 1993. Smith, G.T. Industrial Metrology – Surfaces ... Metallurgy of Machining, Part 1: Basic Considerations and the Cut- ting of Pure Metals. Metallurgia, 3–10, Jan., 1970. Williams, J.E., Smart, E.F. and Milner, D.R. e Metallurgy of Machining, Part...

Ngày tải lên: 21/06/2014, 22:20

... Johnson, 2001] . Machining and Monitoring Strategies  tion machining strategy (i.e. see Fig. 216) and, they can be succinctly summarised as follows: • Direct benets – improved machining eciency, – ... capability of machining thin walls/sections. ese production improvements are by no means all that occur, as invariably, due to the superior machined surface texture, the nal part surface may ... Yamazaki Mazak Corporation] . Machining and Monitoring Strategies  Figure 214. Graphical relationship of high speed machining of metals – according to Salomon’s machining trials. [Source: Salomon,...

Ngày tải lên: 21/06/2014, 22:20

... cutting tool to rest and press against machined surface and thus, generate minute ‘gouging-eects’ in the surface. (Source: Seames, 1990; Smith, 1993) Machining and Monitoring Strategies  Figure ... design and its operation. Machining and Monitoring Strategies  Figure 222. The CNC control problem of servo-lag and its aect on the associated HSM motional kinematics. Machining and Monitoring ... and c, were drawn from an industrial HSM machining expe- rience at a precision metrology company’s premises, using several of the latest vertical machining centres with the spindle of each...

Ngày tải lên: 21/06/2014, 22:20

Ngày tải lên: 21/06/2014, 22:20