Study on grinding deformation of Al2O3-TiC slender bar
The deformation of brittle and hard material slender bar has great significance in contour grinding process. In this paper, the grinding deformation for Al2O3-TiC slender bar was studied. Diamond lapping film and adhesive mounting method were applied in the experiments. The influences of grinding pressure, grinding speed and stress on deformation were discussed in detail based on the theoretical analysis and the measurement of straightness in different conditions. The bend deformation goes up with the increase of grinding pressure and speed. The internal stress will bring large deformation after grinding. Releasing the stress will improve the deformation. Experiments shown that releasing the stress two-thirds at a proper condition before final grinding can achieve the deformation below 1000nm. Employing lapping film and adhesive mounting method in optimal condition, the Al2O3-TiC slender bar deformation in grinding can be controlled.
Warp in High Precision Cut-Off Grinding of Al2O3-TiC Ceramic Thin Plate
Abstract High precision cut-off grinding has been carried out on Al 2 O 3 -TiC ceramic thin plates with metal bond thin diamond wheels. The warp of the cut-part as well as the flatness of work surface, i.e. deflection of wheel, was precisely measured and thus, the warp generation mechanism was analyzed and the optimum slicing condition was investigated. Grinding forces were measured for discussing the warp. Also, the effect of V-shaped guide groove for depressing the deflection was studied. It is evident that the warp of workpiece and the wheel deflection largely depend on grinding type and pre-processing conditions. The high feed cut-off grinding is most effective for restraining the deflection, and the use of a V-shaped groove is a useful way to depress the deflection
Slot Grinding of Steels and Ceramics with Superabrasive Wheels
Abstract Slot grinding (a kind of creep feed grinding) was conducted on SKD-11 and S50C steels and alumina ceramic with different CBN and diamond grinding wheels, using a specially designed abrasive cut-off apparatus. The wheel speed ranged from 33 to 58m/s, where wheel size is 150mm dia. and 1.0mm or 3.0mm width. The maximum wheel depth of cut is 7.0mm and the maximum table speed is 50mm/min. The metal bond CBN wheels of different specifications were used for the slot grinding of steels, while the metal bond diamond wheels were used for the ceramic grinding. Thus, grinding forces were mainly studied under different wheels and operating conditions, and also stress distribution along contact arc, grinding temperature, and chipping of edge were discussed.