Introduction to New Characteristics of Grinding Zirconia Ceramics

Characteristics of Grinding Processing of Zirconia Ceramics

(1) Micro cutting of ceramic parts involves the distribution of numerous abrasive particles between the workpiece and the grinding tool, resulting in a small load on a single abrasive particle. By controlling the appropriate machining load range, a back feed of less than 1um can be obtained, achieving micro cutting of the workpiece material.

998 alumina ceramic rod

(2) According to the principle of evolution, when the ceramic needle gauge of the grinding tool comes into contact with the workpiece, it can automatically select local protrusions for processing under non mandatory grinding pressure. Therefore, only the materials at the protrusions of the two can be cut off, so that the grinding tool and the workpiece can repair each other and gradually improve accuracy. The machining accuracy of ultra precision grinding is almost independent of the motion accuracy of the machine tool that constitutes relative motion. It is mainly determined by factors such as the contact properties and pressure characteristics between the workpiece and the ceramic positioning tool, as well as the shape of the relative motion trajectory. Under suitable conditions, the machining accuracy can exceed the accuracy of the machine tool itself, so this type of machining is called evolutionary machining. In order to obtain an ideal machined surface, it is required to:

① The grinding tool and workpiece can be mutually trimmed;

② Try to ensure that the relative motion trajectories of each point on the machined surface and the grinding disc do not repeat, in order to reduce the geometric shape error of the grinding tool surface and the impact on the surface shape of the workpiece; Copying; Phenomena, while reducing the depth of scratches and surface roughness;

③ On the premise of ensuring that the grinding tool has an ideal geometric shape, using a floating grinding disc can ensure surface processing accuracy.

Processing of zirconia ceramic valve core

(3) In grinding, due to the uneven shape of each abrasive particle and the randomness of its distribution, multi-directional cutting can be achieved when the abrasive particles slide and roll on the workpiece, and the cutting opportunity and cutting edge breakage rate of all abrasive particles are equal, achieving automatic sharpening. By increasing the contact area, contact pressure, and relative movement distance between the workpiece and the abrasive particles, reducing the half apex angle of the abrasive cone can improve machining efficiency; By reducing the particle size of ceramic flange abrasive particles, the contact pressure between the workpiece and abrasive particles, and the volume fraction of abrasive particles, as well as increasing the yield point of the workpiece, the half apex angle of the abrasive cone, and the abrasive rate, surface roughness can be reduced.

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