New Deep Cut Slow Feed Grinding Technology for Ceramic Factory Processing

(1) The abrasive, binder, particle size, hardness, and microstructure of grinding wheels are important indicators for measuring the grinding process performance of grinding wheels. There are three types of abrasives suitable for creep feed grinding of ceramic materials: natural diamond (D), synthetic diamond (SD), and electroplated diamond (SDC); Commonly used binders include metal, resin, and ceramic binders; The particle size affects the lifespan and material removal rate of the grinding wheel. A larger particle size increases the lifespan and removal rate of the grinding wheel, while finer diamond particles can achieve better surface roughness; The hardness of the grinding wheel affects its self sharpening performance. High hardness grinding wheels have poor self sharpening performance, which can easily burn the surface of the parts. Therefore, the grinding wheel selected for slow feed grinding has a softer hardness than the grinding wheel used for conventional grinding; The grinding wheel used for slow feed grinding should be a loose grinding wheel with a relatively loose organizational structure and more photovoltaic ceramic pores to serve as a chip holding groove.

(2) Dressing of grinding wheels. The dressing of grinding wheels is usually divided into two processes: shaping and sharpening. The required geometric shape accuracy of the grinding wheel can be obtained by reshaping, and the bond between the abrasive particles can be removed by sharpening. The ceramic chips of the Sander fully expose the diamond abrasive particles and form a chip space.

The common dressing methods for diamond grinding wheels include grinding wheel rolling method, electrolytic dressing method, elastic ultrasonic dressing method, electric spark dressing method, online discharge electrolytic composite dressing method, and laser dressing method.

(3) Electroceramics grinding fluid. For slow feed grinding, the method of adding grinding fluid can be divided into: ordinary tangential liquid supply method, that is, the grinding fluid is transported to the nozzle and added to the contact arc area along the tangential direction of the grinding wheel; High pressure injection method, which utilizes high liquid supply pressure to spray out the grinding fluid at high speed, causing it to break through the airflow barrier and enter the arc zone, quickly taking away the grinding heat; Air flow baffle assisted filling method, with adjustable air flow baffles installed on the outer circumference and side of the grinding wheel to block the rapid flow of air towards the arc area; Comprehensive liquid supply method, the above various grinding fluid filling methods are often used comprehensively, resulting in better results; The liquid supply method inside the grinding wheel does not require special nozzles or conduits, and the effective liquid supply in the contact area is small, which splashes out grinding fluid and is not good for the environment; The slotted grinding wheel liquid supply method has good cooling effect and is suitable for intermittent injection of slotted grinding wheels into the grinding area.

In most slow feed grinding processes, water-soluble coolant is mainly used, which has four basic types: chemical pure solution, chemical surfactant, synthetic coolant, and emulsion.

Different grinding fluids have different effects on grinding power. When using emulsions, due to their lubrication effect, the friction and wear of diamond grinding wheels are small, resulting in low grinding power; When using chemically pure solutions, the grinding power will increase. The influence of different grinding fluids on the grinding ratio is different. The grinding ratio when using emulsion is greater than that when using chemical pure solution and synthetic solution, while the grinding ratio when using medical mechanical ceramic chemical pure solution and synthetic solution is not significantly different.

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