Download e-book for kindle: Cap. 07-11 Handbook of Machining with Grinding by Wheels I. Marinescu, et al

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Extra info for Cap. 07-11 Handbook of Machining with Grinding

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In the case of diamond, this can sometimes be completed in one operation to be effectively a dress process. Otherwise, two separate grades of conventional abrasive are chosen: the first is with a comparable or larger grit size to true the wheel, the second with a grit size half that of the superabrasive to condition the wheel by eroding the bond only. The processes can be carried out wet or dry and, in general, coolant is used only if used in grinding.

Vitrified diamond wheels, if containing a high porosity, may also be trued with diamond nibs. Dense hotpressed wheels, however, must be trued and conditioned with conventional abrasive wheels and blocks. 15 Grit tool and needle blade tool recommendations for dressing low concentration vitrified cubic boron nitride wheels. 1 INTRODUCTION Rotary diamond tools were the industry’s answer to life issues with stationary tools and are in many ways the rotary equivalents to single points, blades, grit tools, and form blocks.

Larger radii are held to ±10 µm allowing a precise value to be entered into a CNC control to generate an accurate wheel profile. 4 DRESSING CONDITIONS FOR DISC DRESSERS Traverse rates should be calculated from actual geometry of the disc. For discs of a given tip radius, r, and depth of dress, ad, simple geometry gives the effective contact width as bd = 2[(2r – ad)ad]∫. The same rules for overlap factor, Ud , as a function of bd apply as for stationary tools. Dress infeed amounts should be limited to the range of 5 to 20 µm.

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Cap. 07-11 Handbook of Machining with Grinding by Wheels I. Marinescu, et al

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