Machinability and Surface Integrity Part 4 pps

... when high-speed machining. Machinability and Surface Integrity  mentally increased to point ‘e’ 34 – this being a ‘safe- limit’ for the optimum machining operation. 7 .4 Milled Roundness – Interpolated ... at best, only its partial aect would be present here, on this diagram. e ‘Lay’ of a surface tends to be either: anisotropic, or isotropic 44 in nature on a machined...

Ngày tải lên: 05/08/2014, 21:20

... the order to ‘break-rank’ (i.e randomising both their pacing and steps) when proceeding over a structure such as a bridge was mandatory. Machinability and Surface Integrity  is either ‘pearled’ ... of instrument noise, or vibration. [Courtesy of Taylor Hobson] . Machinability and Surface Integrity  Figure 156. Vibration and chatter in machining operations, with the...

Ngày tải lên: 05/08/2014, 21:20

... types of machinability investigation. In the former case, it is Machinability and Surface Integrity  Tool-life Diagrams Machinability is a subject that has yet to be fully-de- ned and analysed, ... appropriate cali- Machinability and Surface Integrity  Figure 178. Multi-axis non-rotating dynamometers, used for: milling, drilling and turning experimental data-ga...

Ngày tải lên: 05/08/2014, 21:20

... tribological action of machining and its aect on induced residual stresses and the micro- hardness ‘foot-printing’ technique . Machinability and Surface Integrity  the Vickers 84 , or the Knoop 85 is ... enter- ing the surface leading to greater thermal damage and poorer part surface integrity. e chemical mechanism is dominant across all classes of production pr...

Ngày tải lên: 05/08/2014, 21:20

Ngày tải lên: 05/08/2014, 21:20

... which it appears. Machinability and Surface Integrity  Figure 144 . The major factors that inuence a machined component’s condition. Machinability and Surface Integrity  7.1 Machinability Introduction ... relationship be- tween chemical composition and cutting speed is: Cutting speed (V 60 ) = 161.5 – 141 .4 × %C – 42 – 4 × %Si – 39.2 × %Mn – 179 .4 × %P + 12...

Ngày tải lên: 05/08/2014, 21:20

... Figure 148 . Graphical results obtained from the accelerated machinability test, illustrating how ank wear and surface texture degrades, with the number of facing-o passes . Machinability and Surface ... output of machinability trials. Figure 149 . Flow chart indicating the desigh philosophy for unbiased and ranked machinability trials. Machinability and Surface In...

Ngày tải lên: 05/08/2014, 21:20

... processes. Machinability and Surface Integrity  the surface topography, if used in conjunction with the Ra value (Fig. 1 64) . is is particularly true for many machining applications and where ... following expression: Machinability and Surface Integrity  the point, that all of these two-dimensional surface pa- rameters can be classied into three distinct grou...

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... these tests was 40 0 m min –1 and the machinability trials used an in-cut time of just 6 seconds – in order to maintain a sharp cutting edge on the tools. Machinability and Surface Integrity  Figure ... ‘beta-function’ and typical ‘manufacturing process envelopes’. Machinability and Surface Integrity  the considerably larger eective tool nose radius, act- ing l...

Ngày tải lên: 05/08/2014, 21:20

... (isotherms) during machining, illustrated across the: chip, insert and work- piece; at relatively low cutting speed . Machinability and Surface Integrity  Figure 173. Finite Element Method (FEM), to ... – is usually the re- sult of tool/workpiece anity associated with tem- Machinability and Surface Integrity  perature and its respective cutting speed (i.e. see Fig...

Ngày tải lên: 05/08/2014, 21:20