A kind of grinding wheel applied to the concentricity grinding of ceramic ferrule and its preparation method

Abstract

The invention relates to a preparation method of a grinding wheel applied to coaxiality grinding of a ceramic ferrule, and belongs to the technical field of ultra-precision machining of optical fiberconnecting material. The u preparation method comprises the following steps of 1, a diluted modified phenolic resin solution, a zirconium oxide hollow microsphere and calcium fluoride are added into ethyl acetate, and are stirred for 1 -3 hours at the temperature of 50-90 DEG C a sodium chloride solution is added, a mixture is heated for 45-90 minutes for at the temperature of 75-85 DEG C, a blockmixture is obtained, then modified polyimide resin is added, ball milling is carried out, and sieving is carried out to obtain a binding agent; 2, diamond and the binding agent prepared in the step 1are weighted according to the mass ratio of 1 to 3-8, sieving is carried out, pressing is carried out at the temperature of 280 DEG C with the pressure of 5 MPa to 15 MPa, the pressure maintaining time is 30-80 minutes, so that a grinding layer is obtained; 3, the grinding layer is bonded to fluorosilicone rubber, the fluorosilicone rubber is adhered to a grinding wheel base body to obtain a grinding wheel semi-finished product; and 4, feeding hole and the discharging hole chamfering of the semi-finished grinding wheel is carried out to obtain a finished product.

Description

technical field [0001] The invention belongs to the field of ultra-precision processing of optical fiber connection materials, and in particular relates to a grinding wheel used for coaxiality grinding of ceramic ferrules and a preparation method thereof. Background technique [0002] The ceramic ferrule is a high-precision cylindrical special zirconia ceramic element that is precisely centered in the fiber optic connector plug. It has high hardness and high melting point, and it is difficult to grind. The coaxiality of the outer circle and the smoothness of the outer surface of this kind of workpiece are extremely high, so as to meet the fixing requirements of the optical fiber and meet the assembly requirements for production and use. It is generally required that the outer round finish Ra<0.1μm, and the coaxiality requirement ≤1μm. [0003] At present, the grinding wheel for processing the outer circular coaxiality is mainly a vitrified bond diamond abrasive grinding ...

AI Technical Summary

Problems solved by technology

However, there are three problems in the process of processing: 1. In the process of mass production, the surface finish of the outer circle cannot reach Ra0.1

2. The coaxiality of the outer circle is greater than 1 μm; 3. For single-grain grinding, the frequency of thimble breakage is relatively high, and the needle will break after grinding about 400 ferrules; for threading grinding, the phenomenon of wire breakage is serious, about 10 -13 groups of ferrules, there will be a disconnection

The above problems not only affect product quality, but also result in higher production costs and lower production efficiency

[0004] The vitrified bond diamond grinding wheel has high strength, wear resistance and long service life. However, when grinding hard and brittle zirconia ceramic ferrules, the self-sharpening of the grinding wheel is not good due to the high matching hardness. The three problems mentioned above are prone to occur

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