Abrasive wheels-dressing

Abrasive appHcations for industrial diamonds include thek use in rock drilling, as tools for dressing and tmeing abrasive wheels, in polishing and cutting operations (as a loose powder), and as abrasive grits in bonded wheels and coated abrasive products. 

Dressing abrasive wheels on an off-hand grinder can be carried out using a star-wheel dresser, comprising a handle, at the end of which is fitted a series of star-shaped wheels and two lugs on the underside as shown in Fig. 7.18. 

Avoid clogging and uneven wear. Dress frequently where appropriate. Always allow the abrasive wheel to stop naturally, not by applying pressure to its surface. 

ELID grinding is a grinding process that employs metal bond-abrasive wheels continuously in situ dressed via an electrolytic process. The procedure... 

Natural and synthetic diamonds have been used for many years to true up and dress abrasive wheels. These are held in a holder of the required shape by vacuum brazing or held in a powder metal matrix and can be single point tools, multi-point grit tools, blade tools or cluster tools depending on the application (see Fig. 10.10). 

Dress mode allows dressing of the abrasive wheel to a number of different forms, the basic mode being straight across the periphery of the wheel. 

Crush Dressing. Shaping the face of an abrasive wheel to a required contour by means of steel rolls. 

Dresden Green. A ceramic colour for use up to about 1100°C. It consists of (%) CoO, 24 CrjOj, 52 ZnO, 24. Dressing. The process of removing, from the face of an abrasive wheel, those grains that have become dulled during use. 

Star Dresser. A tool for the dressing (q.v.) of abrasive wheels it consists of a series of star-shaped metal cutters separated by washers, freely mounted on the spindle of a holder. Also known as a... 

Uses. Apphcations for boron carbide relate either to its hardness or its high neutron absorptivity ( B isotope). Hot-pressed boron carbide finds use as wear parts, sandblast no22les, seals, and ceramic armor plates but in spite of its hardness, it finds Httie use as an abrasive. However, this property makes it particulady usehil for dressing grinding wheels. 

Diamond is extensively used for the dressing of precision grinding wheels. The grinding process using conventional, diamond and cBN abrasives is extensively used in the finishing of ferrous, tungsten carbide and ceramic components. Here, the geometrical tolerance, the surface finish of the wheel and its condition is critical and the dresser s function is to achieve and maintain these characteristics. 

Wang, X., Ying, B., and Liu, W., "EDM Dressing of Fine Grain Super Abrasive Grinding Wheel," Journal of Materials Processing Technology, Elsevier, Vol. 62, 1996, pp. 299-302. 

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