Graphene reinforced alumina-based ceramic bearing for robot

Abstract

The invention relates to a graphene reinforced alumina-based ceramic bearing for a robot, which is prepared by the following steps: mixing alumina ceramic powder and graphene powder by using a three-dimensional mixer to obtain uniformly mixed alumina-based ceramic core powder; mixing the ceramic powder and a plasticizer to prepare required ceramic slurry, pressing a wet ceramic core sample by using a hot-press injection molding method, and sintering the obtained wet ceramic core under the protection of an inert atmosphere to obtain the graphene-reinforced alumina-based ceramic core. Accordingto the invention, the graphene material with excellent mechanical properties and thermal properties is innovatively introduced into the alumina-based ceramic core material system, the preparation process of the graphene-reinforced alumina-based ceramic core material is simple and feasible, the operability is strong, and the prepared ceramic core has excellent high-temperature properties and is easy to dissolve. The ceramic core can meet the preparation and use requirements of the single crystal hollow blade, and the size precision and the percent of pass of the blade can be guaranteed.

Description

technical field [0001] The invention belongs to the field of precision casting, and in particular relates to a graphene-reinforced alumina-based ceramic bearing for robots. Background technique [0002] It is well known that during the operation of the robot, the driving equipment generates heat. Each driving equipment includes multiple electrical components, which can withstand temperatures up to 70°C. Beyond this temperature, the driving equipment may be damaged. Industrial robots are usually specified Operating in an environment as high as 50°C, the power-over temperature of the motor often reaches 145°C, so that the motor and the driving equipment generate heat. The driving equipment in the prior art is located in the control cabinet, and the cooling equipment such as a fan is installed in the control cabinet. Keep the temperature of the driving equipment lower than the maximum operating limit temperature of 70°C. This design not only inhibits the working efficiency of t...

AI Technical Summary

Problems solved by technology

The addition of mineralizers will easily lead to a decrease in the high-temperature performance of the alumina ceramic core, such as high-temperature strength and high-temperature deflection, etc.

At present, the high temperature strength of alumina-based ceramic cores commonly used is below 10MPa, and the high temperature deflection is ≤0.5mm, which seriously affects the dimensional accuracy and casting pass rate of blades.

In addition, due to the relatively stable chemical properties of alumina materials, it is difficult to react with substances such as acids and bases. As the structure of the inner cavity of the blade becomes more and more complex, the removal of alumina ceramic cores has increasingly become a bottleneck restricting its use.

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