RU1835422C - Composition for the substrate of a polishing tool - Google Patents

Abstract

The inventive composition contains, wt.%: Cured epoxy dianovy resin 60-65, potassium chloride 10-14, abrasive (polyrite, zirconium dioxide, basic zirconium sulfate, zirconium dioxide), 11-15, cork crumb 5th, chloride ammonia 3-5 ° In the mixer, crushed cork, potassium chloride, ammonium chloride and abrasive are mixed, then epoxy diane resin and polyethylene polyamine hardener are introduced. The mass is placed on the body of a pre-fat-free polishing pad and the required radius of the substrate is formed for 24 hours. Characteristics: productivity 40-55 mg / min purity class III, stable form of 3 rings, number of processed blocks without dressing 750-800 1 table

Description

The invention relates to abrasive processing and can be used to polish optical parts and other glass products.

A known polishing tool substrate is zirconia, zirconium sulfate basic, polyvinyl butyral and sodium chloride.

A disadvantage of the known substrate is the low productivity of the polishing process, which is due to slipping of the substrate on the polished surface, which leads to a decrease in the useful work of the equipment, and an increase in the tool rotation speed of more than 700 rpm leads to a softening of the substrate, thereby reducing the accuracy and purity of processing

The closest in technical essence to the claimed is the composition for the substrate of the polishing instrument for optical parts, including epoxy resin, zirconium dioxide, zirconium sulfate basic, potassium chloride in the following ratio of components, wt.%: Cured epoxy diane resin 50-60 Dioxide zirconium 2-10 Zirconium sulfate basic 8-10

Potassium Chloride Else The disadvantage of this known composition is the low productivity of the polishing process and the low stability of forming. Low performance caused by undershot00

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the frictional properties on the substrate due to the absence of fillers having high frictional properties, which allow mechanically removing the broken glass layer from the treated surface, exposing the mainland (deep) glass for subsequent abrasive processing. Low productivity is explained by the use of only mechanical dispersion of the surface layer of glass with an abrasive filler without involving in the polishing process a chemical effect on the decomposition of the surface layer of glass when accelerating these chemical processes using friction fillers

The aim of the invention is to increase the productivity of the polishing process by increasing the adhesion of the composition of the polishing substrate to the polished surface, as well as ensuring the stability of the formation

The goal is achieved in that the composition for the substrate of the polishing tool containing in. as a reagent, potassium chloride, as an epoxy resin binder, and also an abrasive, contain ammonium chloride as an activating pore-forming substance and as a filler for a friction material particle, such as a plug, in the following ratio of components, May: Cured epoxy diane resin 60-65 Chloride potassium 10-N

Abrasive 11-15

Friction Particles

filler 5-10 Ammonium chloride As the abrasive in the composition for the substrate can be used polyrite, cerium dioxide, basic zirconium sulfate, zirconium dioxide. Particles of friction material are introduced as a filler to improve the adhesion of the substrate to the polished surface. In the proposed substrate, the grains of abrasive and particles the friction material is firmly fixed in a solid binder, eliminating their mutual displacement, Due to the high friction ability of these particles in the polishing zone, the temperature rises and the surface layer of glass, which i contributes to the intensification of the polishing process due to plastic deformation of the surface layer with the simultaneous removal of colloidal

films from the glass surface, In addition, potassium chloride intensively dissolves the surface layer of glass, “Ammonium chloride, forming pores in the substrate in

In the process of its molding, it enhances the properties of the friction particles, thereby making it possible to obtain a microcellular structure of the substrate, followed by fixing in the cells part of the abrasive performing glass removal work.

The inventive composition for the substrate of the polishing tool differs from the known introduction of new

0 components, namely ammonium chloride and particles of friction material

The use of certain known substances in known compositions, for example, ammonium chloride in combination with other components, does not provide the compositions with the properties that they exhibit in the claimed solution, namely, an increase in the productivity of the polishing process and

ensuring the stability of shaping and, as a consequence, the ability to automate the polishing process. Thus, this composition of the components gives the substrate of the polishing tool new properties.,

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PRI me R. Composition Components

polishing substrates: GOST 10587-78 epoxy resin, GOST potassium chloride, cerium oxide, particles of friction material (cork crumbs) are dehydrated during preparation by drying in a SMOL type oven at a temperature of 30 ° C for 2 hours “Friction material particles ( in the example, crumb plugs) are sieved through a sieve with a mesh size depending on the requirements for manufacturing parts with color accuracy c. In the manufacture of color-more accurate parts, particles of friction material of smaller size are used with some izheniem intensity glass removal and for less accurate color parts using particles with a large size to intensify detachably glass.

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Components: friction material particles, potassium chloride, ammonium chloride and cerium oxide are mixed, in a pi-barrel mixer for 2 hours

The specified mixer is a cylindrical vessel made of metal, in the end parts of which there are eccentricity axes which are attached to a rotating mechanism (electric motor) o When rotating, the cylinder makes a very complex curve. Together with the components to be mixed, metal balls are laid, which, moving inside the rotating cylinder, contribute to uniform mixing of components with different specific gravities

Then, the amount of ED-20 epoxy dianovoy resin required (GOST 10587-8 0 with a polyethylene polyamine hardener (TU 6-02- -59 f-85)) is taken and the mixture of components is introduced into the epoxy resin. The mixture is mixed until a uniform, viscous consistency is obtained. and place it on the body of a pre-fat-free polishing pad, then the required radius of the substrate is formed by the punch by pressing it. “The punch is left to cure the composition for about 2k hours. Then the punch is separated and additional surface treatment of the substrate with diamond is correct com obtain the required accuracy of the surface shape of the fabricated polishing substrate

For experimental verification of the claimed composition were prepared five mixtures of the ingredients presented in the table

Experimental data show that the proposed composition for the substrate of the polishing tool allows, in comparison with the prototype, to ensure the accuracy of the stably obtained shape, to improve the cleanliness of the obtained surfaces by a class, thereby significantly expanding the scope of application of the polishing pad with the applied substrate.

The pitch-rosin composition according to RTM 3-72-70 is taken as the base object. Adhesive and polishing resins for processing optical parts, containing pine pitch TU 13-360-77 and pine rosin, grade A, GOST 19113-73, the most widely used in optics -mechanical industry “Compared with it, the proposed polishing tool substrate allows you to 8 times increase the productivity of the polishing process, taking into account the time required to obtain cleanliness and shape. In addition, the use of the proposed substrate allows the use of amb elevated treatment regimes (up to 180 m / min) to eliminate consumption of scarce natural materials such as wood rosin, and pitch "

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Using the proposed composition of the substrate of the polishing tool also makes it possible to automate the process of polishing optical parts in connection with the multiple repeatability of the stably obtained shape. The productivity of the polishing process is increased by an average of 20%.

Claims (1)

The claims The composition for the substrate of the polishing tool, containing a cured epoxy diane resin, potassium chloride and an abrasive, characterized in that, in order to increase the productivity of the polishing process and the stability of shaping, it additionally contains crumb plugs and ammonium chloride in the following ratio, wt. Cured Epoxy Dianova resin 60-65 Potassium Chloride 10-14 Abrasive 11-15 Cork Tiny5th Ammonium chloride 3-5 „ Base pine pitch45 rosin55 Prototype / epoxy dianova resin55 Zirconium Dioxide 6 basic sulfate zirconium 9 potassium chloride 30 Epoxy Dianova resin60 Potassium chloride 14 Cerium Dioxide 11 Cork Tiny10 Ammonium Chloride5 Epoxy Dianova resin63 Potassium chloride 1 4 Cerium Dioxide 15 Cork Tiny5 Ammonium Chloride3 Epoxy Plane resin 6 5 Potassium chloride 10 Cerium Dioxide 12 Cork baby Ammonium Chloride3 Epoxy Dianova resin63 Potassium chloride 10 Cerium Dioxide 14 12 III 25 III 310 40 III 800 fifty III 750 55 II 800 10 Continuation of the table Tube Ammonium Chloride Epoxy Diane Resin Potassium Chloride Cerium Dioxide Tube Crumb Ammonium Chloride fifty III 850 45 III 800