Self-lubricating grinding tool and preparation method thereof

Abstract

The invention discloses a self-lubricating grinding tool comprising a grinding material, a binding agent and a cyclodextrin inclusion compound including a lubricant and also discloses a preparation method of the self-lubricating grinding tool. In a technical scheme, a microencapsulation which is made of resin materials and wraps the lubricant in the prior art is replaced with the cyclodextrin inclusion compound including lubricant molecules, can not only meet the curing requirements of the binding agent for concreting the grinding tool because a cyclodextrin inclusion compound monomer has a nano-grade particle diameter, and agglomerated particles of the cyclodextrin inclusion compound can exist in a submicron grade way by being crushed in an ultramicro way and also resist the curing temperature of the resin binding agent, but also ensures the sustained and effective release of the lubricant in a machining area during grinding because the particle diameter of the cyclodextrin inclusion compound can be adapted to the abrasion loss of the self-lubricating grinding tool, thereby enhancing the grinding ratio of the grinding tool and obtaining machining parts with high surface quality.

Description

technical field [0001] The invention relates to an abrasive tool for grinding, in particular to a consolidated abrasive tool such as a grinding wheel, a whetstone, a grinding disc, and a grinding head, in particular to a self-lubricating abrasive tool and a preparation method thereof. Background technique [0002] During grinding, due to the high-speed cutting and friction of abrasive grains in the grinding area, extremely high temperatures will be generated, causing burns on the surface of the workpiece and severe wear of the grinding wheel, resulting in deterioration of the accuracy and surface integrity of the processed workpiece . Therefore, it is usually necessary to inject grinding fluid into the grinding area to reduce the grinding temperature during grinding. Grinding fluid has the functions of lubricating, cooling, penetrating, cleaning and rust prevention, among which lubricity is the main factor affecting the performance of grinding fluid. Good lubrication can re...

AI Technical Summary

Problems solved by technology

The cutting speed of honing and superfinishing is lower than the grinding speed of grinding wheel. Although the texture generated on the processing surface helps the grinding fluid enter the processing area, the contact area between the oilstone and the workpiece is large, and the lubricating oil film and extreme pressure film are still formed. tougher

[0005] The practice of directly adding oily agent and extreme pressure agent to the existing grinding fluid still has some other defects during use: the animal and vegetable oil used as the oily agent in the grinding fluid has shortcomings such as high freezing point and strong smell; When the extreme pressure agent interacts with the metal surface to form a sulfur chloride phosphorus compound film, the active elements (chlorine, sulfur, phosphorus, etc.) of the extreme pressure agent pollute the metal processing operation conditions and are harmful to the human body: sulfurized mineral oil containing active sulfur It will corrode copper and copper alloys, workpieces and machine tools. When oil is stored, it is easy to precipitate sulfur and emit an odor; chlorine compounds are easily hydrolyzed to form free HCl, which will cause corrosion of metal surfaces; extreme pressure agents will also affect the oxidation resistance in cutting fluids The role of anti-corrosion agent and anti-corrosion agent

It can be seen from the above that, because the existing relevant research and patents have used microcapsules with a particle size of several to tens of microns, the particle size is much larger than the amount of wear per revolution of the abrasive tool, so when such an abrasive tool is used, Once the microcapsules are worn out, the contained lubricant is thrown out by the centrifugal force of the high-speed rotating abrasive tool, and subsequent grinding may not get enough lubricant, and the self-lubricating performance of the abrasive tool is poor

Although the particle size of microcapsules can be reduced to improve the sustained-release performance of abrasives, the preparation process of microcapsules with a particle size of tens of nanometers is still immature, and the cost is high and the practicability is poor.

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