Superabrasives Brand DIABON
64Pages

Types of grinding tools 4 - 6 Definition of grinding and general information 8-11 Designation, selection and ordering 12 - 16 Instructions for the use of grinding tools 20 - 22 Review of grinding tools by type 25 - 60

SWATY PROFESSIONAL DIABON EXTENDED PERFORMANCE GRINDING TOOLS e grinding wheels, Compared to standard bakelit e a greater PROFESIONAL DIABON hav ance grinding wheels SWATY ding strength. extended perform y and higher tensile and ben bility, better thermal conductivit temperature sta case of extensive stock ing grinding applications, in ding tool. They are suitable for demand mechanical loads on the grin sequently large thermal and removal and con primarily in the field eels have become established SIONAL DIABON grinding wh worked materials and PROFES are required due to ever harder Extended...

Page Contents Shapes of grinding tools . . . . . . . Grinding and general information . . • Basic grinding parameters • Basic factors of grinding • Superabrasive grits • Application of resin bonded CBN and diamond grinding tools • • • • • • • • 4 8 8 9 9 11 Designation, selection and ordering . . 12 Example of grinding tool designation Shapes of grinding tools Material of the grinding tool body Grinding tool dimensions Selecting the art and type of superabrasive grit Selecting the superabrasive grit size Bond selection Superabrasive grit concentration Recommendations and tips . . . . . . •...

GRINDING AND GENERAL INFORMATION Grinding with superabrasives is a procedure in which the cutting part of the abrasives consists of a large number of non-uniformly distributed cutting edges. These cutting edges are formed using superabrasive grit. Superabrasive particles are bonded into the abrasive rim layer of the grinding tool together with certain fillers using phenol-formaldehyde or polyimide resin. The grinding tool body provides appropriate strength and rigidity, reduces vibrations and the heat. Basic grinding parameters T s vs Ps vw Vb a vs bk vs D n Ps a vw Vb – – – – – – –...

Basic grinding factors - workpiece; (material, shape, hardness) - type of grinding - grinding parameters; (vs, a, Qw) - grinding tool; appropriate shape and body, appropriately selected components of the abrasive rim layer - dressing of the grinding tool - cooling and lubrication - type and condition of the grinding machine The efficiency and cost-efficiency of grinding with superabrasives are affected by all of the above factors. This catalogue focuses primarily on the correct selection of grinding tools, as well as on the interactions and our recommendations regarding other factors....

The proportion of use of superabrasives increases on a constant basis. Swaty uses superabrasive grits from the world’s most reputable manufacturers. Hardness Thermal conductivity Poor Medium Chemical resistance Thermal stability Good Strength SiC grit Aluminium oxide grit CBN grit Comparison of the cost-efficiency of grinding of different types of steel. 100 90 80 70 60 50 40 savings 30 overhead 20 work 10 0 grinding tool Al2O3 10 CBN CBN

APPLICATION OF RESIN BONDED CBN AND DIAMOND GRINDING TOOLS 11

DESIGNATION, SELECTION AND ORDERING OF GRINDING TOOLS 1A1 100x10x3x20 D151 - 54 GRINDING TOOL SHAPE D GRINDING TOOL DIAMETER T GRINDING TOOL THICKNESS X ABRASIVE RIM LAYER THICKNESS H BORE DIAMETER Shapes of grinding tools These are designated according to the EN 13236 and FEPA standards. Selection of the most rigid shapes is recommended, as bodies cores are less sensitive to impact and prevent vibrations. Also, cup shapes are better for side surface grinding than wheel shapes. 12

WorstBest SINTER-ALUMINIUM - Medium weight material used for rigid grinding wheel bases. It adequately dampens vibrations, removes heat and provides good mechanical strength. DURALUMINIUM – A heavier material which should be used when more stable bases are needed. It provides good mechanical strength and also better heat removal than sinter-aluminium. STEEL – Steel bases are significantly heavier than the other four types of materials. They are used whenever good mechanical properties need to be ensured even with thin abrasives, for example cutting-off wheels (1A1R). BAKELITE – A lighter...

Selection of superabrasive grit size The size of abrasive grits determines the effect of grinding and the surface roughness. The most cost-effective choice is the coarsest granulation that still achieves the required surface roughness. If a greater amount of material needs to be removed during grinding, a combination of two step coarse grinding and finish grinding is the most cost-effective. In the table, grit sizes according to the FEPA, US ASTM and German DIN standard are stated for comparison. To simplify, one can view the sizes according to the FEPA standard as approximately...

Superabrasive grit concentration The concentration should be selected with respect to the grinding procedure. Low concentrations are recommended for fine abrasive grits, with large contact surfaces between the abrasive and workpiece and in manual grinding; high concentrations are more suitable for coarse grits and small contact surfaces and whenever large profile stability of the grinding tool is required. This is expressed as the quantity of diamond or cubic boron nitride grits in carats/cm3 of the superabrasive rim layer (1 ct = 0.2 g). The diagrams show the volume percentage of...

RECOMMENDATIONS AND TIPS FOR SELECTING OPERATING PARAMETERS Apart from a correct selection of DIABON superabrasives shapes and specification, it is important to observe recommendations on peripheral speeds, which are given in the table below (along with rpm) for optimum grinding with Swaty abrasives. Recommended peripheral speeds Diamond grinding tools GRINDING PROCEDURE Surface grinding Internal cylindrical grinding External cylindrical grinding Tool sharpening CNC tool grinding Wet grinding 20 - 30 10 - 20 20 - 30 18 - 28 18 - 22 CBN grinding tools Dry grinding 15 - 20 8 - 12 Wet grinding...