Graphene reinforced alumina-based ceramic bearing for robot

A technology of alumina ceramic powder and graphene, which is applied in the field of precision casting, can solve problems such as the restriction of alumina ceramic cores, affecting the dimensional accuracy of blades and casting pass rate, and the decline in high temperature performance of alumina ceramic cores.

Inactive Publication Date: 2020-07-07
GUOREN ROBOT TIANJIN CO LTD
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  • Abstract
  • Description
  • Claims
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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 di

Method used

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  • Graphene reinforced alumina-based ceramic bearing for robot
  • Graphene reinforced alumina-based ceramic bearing for robot

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preparation example Construction

[0021] A method for preparing a graphene-enhanced alumina-based ceramic bearing for a robot, comprising the following steps:

[0022] (1) Alumina ceramic powder, silicon oxide powder, and graphene powder are mixed according to the weight percentage using a three-dimensional mixer to make a ceramic powder with uniform mixing and uniform composition.

[0023] (2) Add a plasticizer accounting for 15% to 24% of the mass of the ceramic powder, first dissolve the plasticizer, then gradually add the ceramic powder to the plasticizer, and continue stirring after all the ceramic powder is added 10h~20h to prepare ceramic core slurry.

[0024] (3) Adopt hot pressure injection molding method to prepare ceramic core, the ceramic core slurry that will obtain in step (2) is packed in injection equipment, obtain required wet state ceramic core in mold, injection pressure 2MPa ~ 4MPa, and keep the pressure for 10s ~ 30s;

[0025] (4) Sinter the wet ceramic core obtained in step (3) under th...

Embodiment 1

[0030] A graphene-enhanced alumina-based ceramic bearing for a robot is prepared from the following raw materials: 45% of 200-mesh alumina powder, 45% of 325-mesh alumina powder, 8% of nano-silica powder, and submicron graphene powder 2%. A plasticizer accounting for 15% of the mass of the ceramic powder is added.

[0031] The preparation method of ceramic core comprises:

[0032] (1) Alumina ceramic powder, silicon oxide powder and graphene powder are mixed using a three-dimensional mixer to make a ceramic powder that is evenly mixed and has a uniform composition.

[0033] (2) Add a plasticizer accounting for 15% of the mass of the ceramic powder. After the plasticizer is dissolved, the ceramic powder is gradually added to the plasticizer. After all the ceramic powder is added, continue stirring for 10 hours to obtain a ceramic core slurry.

[0034] (3) adopt hot pressure injection molding method to prepare ceramic core, the raw material that will obtain in step (1) is pac...

Embodiment 2

[0038]A graphene-enhanced alumina-based ceramic bearing for a robot is prepared from the following raw materials: 46% of 200-mesh alumina powder, 46% of 325-mesh alumina powder, 6.5% of nano-silica powder, and submicron graphene powder 1.5%. A plasticizer accounting for 18% of the mass of the ceramic powder is added.

[0039] The preparation method of ceramic core comprises:

[0040] (1) Alumina ceramic powder, silicon oxide powder and graphene powder are mixed using a three-dimensional mixer to make a ceramic powder that is evenly mixed and has a uniform composition.

[0041] (2) Add a plasticizer accounting for 18% of the mass of the ceramic powder. After the plasticizer is dissolved, the ceramic powder is gradually added to the plasticizer. After all the ceramic powder is added, continue stirring for 15 hours to obtain a ceramic core slurry.

[0042] (3) adopt hot pressure injection molding method to prepare ceramic core, the raw material that will obtain in step (1) is ...

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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...

Claims

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Application Information

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IPC IPC(8): C04B35/117C04B35/622C04B35/634C04B38/06B22C1/00B22C9/10B22C9/24
CPCB22C1/00B22C9/10B22C9/24C04B35/117C04B35/622C04B35/63496C04B38/067C04B2235/3418C04B2235/425C04B2235/5436C04B2235/6562C04B2235/6567C04B2235/96C04B38/0074
Inventor 杨振勇
Owner GUOREN ROBOT TIANJIN CO LTD
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