Atlas of Machined Surfaces by K.J. Stout, E.J. Davis, P. Sullivan

By K.J. Stout, E.J. Davis, P. Sullivan

Quite a few production techniques are used to create standards that allows you to specify a producing method with a view to produce a floor having the required features. The engineering surfaces, each one of which produces a floor with its personal attribute topography. it is very important observe that this caliber engineer must have a process with the intention to offer topography may perhaps impact the suitability of a floor for particular sufficiently exact details, relative to the desired practical functions. regrettably, the connection among features, to make sure that surfaces were produced inside floor topography and practical behaviour isn't but totally the pre-determined tolerance degrees. understood. it's transparent, although, that there are relatively specified matters which must be addressed: (1) the connection among floor CHARACTERIZATION manufacture and the ensuing floor topography, and (2) the connection among topography and serve as. it's also transparent that the most typical approach to identifying floor features is an sufficient realizing of those concerns can merely be by utilizing a stylus-based measuring device. The stylus completed by using an appropriate procedure for is drawn around the floor at close to consistent speed for a preĀ­ characterization of the topography. this sort of characterization made up our minds distance. The vertical tours of the stylus, relative strategy consists of either visible and numerical recommendations.

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Extra resources for Atlas of Machined Surfaces

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4 GROUND SURFACE 50 ATLASOFMACHINEDSURFACES The figures presented in this section show a surface typical of those produced by the fine grinding process. 1) clearly shows the grinding marks caused by the cutting action of the grits attached to the periphery of the grinding wheel and the directional nature of the grinding process. The grits are held at a variety of levels in relation to the circular envelope scribed by the grinding wheel as it rotates. Some grits are newly formed and sharp, generating a clean cutting action, whilst others exhibit varying degrees of bluntness, leading to surface formation by wear, ductile deformation and fatigue.

This inversion enables the total shape of the valleys to be more fully appreciated. Note that the remaining valleys are still nonunifonn in shape. 30 ATLAS OF MACHINED SURFACES Parameters ReI. freq . 12 This figure presents the height distribution and associated parameters of the surface after 70% Rt truncation. 13 Here contact % is plotted against truncation %. The nature of the curve shows a slow but continuous transition from low contact % to high contact % as the surface is truncated. It can be seen that 50% contact will occur at a truncation level of approximately 62% Rt.

81 ReI. freq. 76 ReI. freq.

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