Diamond grinding wheels

The limited tractability of the polymer makes processing in conventional plastics form very difficult. Nevertheless the materials have been used in the manufacture of seals, gaskets and piston rings (Vespel-Du Pont) and also as the binder resin for diamond grinding wheels. 

Bryant, J. Which diamond grinding wheel Manuf Eng. 1998, 120 (3), 74-79. 

Ever since Antoine Lavoisier in 1792 and Smithson Tenet in 1797 demonstrated that diamond and graphite are allotropic forms of carbon, man has been interested in converting the relatively abundant graphite into the much rarer diamond. Success in this endeavor, however, has been achieved only in recent years, and tiny crystals about jV inrn average diameter, valued at about 6000 per pound, are being quantity produced in direct competition with natural diamonds. These diamonds are used primarily in diamond grinding wheels. 

The sintered magnets are hard and brittle. They can only he machined by the techniques developed for Alnicos, ceramic magnets or semiconductors. They can he sliced with diamond impregnated blades, surface ground with carborundum or diamond grinding wheels, or cut on electric spark-erosion machines (EDM). This must he done in a demagnetized state. 

Graphite, PCD, metal-bonded cBN, and diamond grinding wheels... 

Spur, G., Stark, C., and Tio, T.H., 1985, Grinding of non-oxide ceramics using diamond grinding wheels. Machining of Ceramic Materials and Components, Sub-ramanian, K. and Komanduri, R., Eds., PED-Vol. 17, ASME, p. 33. 

Most of the high-efficiency grinding experiments were conducted on a vertical machining center. A straight metal-bonded diamond grinding wheel was inserted into the machine spindle. The electrolysis occurs on... 

The next series of experiments were performed using diamond grinding wheels with a range of abrasive friability. Diamond grinding wheels with MBG 660, RVG, and MBG 600 diamonds were employed. RVG diamond is the most friable and MBG 660 the least friable. The bond material for all the wheels was steel. The grinding ratio for all these wheels and the cast iron powder-bonded wheels was determined for ELID grinding and for conventional grinding. The results are presented in Table 5.1. 

Grain Size of Used Diamond Grinding Wheels... 

Welch, E., Yi, Y., and Bifano, T., "Electro Chemical Dressing of Bronze Bonded Diamond Grinding Wheels," Proceedings of the International Conference on Machining of Advanced Materials, NIST publication 847,1993, pp. 333-340. 

The grain size of diamond grinding wheel has the characteristics presented in Table 9.2. 

Qian, J., Li, W., and Ohmori, H., Precision internal grinding with metal-bonded diamond grinding wheel. Journal cf Materials Processing Technology, Vol. 105, 2000b, pp. 80-86. 

FIG U RE 7.50 The introduction of an active component into the diamond grinding wheel. This additive facilitates the treatment of hard alloys. (Redrawn from Shchukin, E.D. (Ed.), The Successes of Colloid Chemistry and Physical-Chemical Mechanics, Nauka, Moscow, Russia, 1992.)... 

Hot isostatic processes are also used to produce open porous material for filter applications or cast iron diamond grinding wheels [lOj. 

---