SU1348155A1 - Device for impregnating abrasive tool - Google Patents

Abstract

The invention relates to the manufacture of an abrasive tool, in particular with regard to the impregnating compositions of an abrasive tool. The aim of the invention is to increase the durability of the abrasive tool, the specific grinding productivity and the quality of the surface to be treated. For this, the composition of the impregnator contains a solid lubricant - molybdenum diselenide and self-curing polymer - with Ana-Therm-1u in the following ratio of ingredients, wt.%: Molybdenum dislenide - 25-35; “Anatherm-1u - the rest. “Ana-therm-1y, which has high capillary properties, allows the molybdenum diselenide particles to be evenly and completely distributed in the pores of the circle. This composition reduces the cutting forces, the friction coefficient of the circle system is the material being processed. 3 tab. SA :) 00 ate a joint venture

Description

The invention relates to the manufacture of an abrasive tool, in particular with regard to the impregnating compositions of an abrasive tool.

The aim of the invention is to increase the durability of the abrasive tool, the grinding productivity and the quality of the surface to be treated.

For this purpose, a solid lubricant, molybdenum diselenide, was additionally introduced into the composition of the greenhouse, containing a self-curing polymer, and the impregnator contains A11term-1u as the self-balancing polymer, the ingredients being taken in the following ratio, wt.%:

Molybdenum diselenide25--35

"Anatherm-1u Else

The anaerobic material "Anaterm-1u is a single-nomeptnu) is a liquid consistency composition based on oligoether acrylates with a strictly defined combination of peroxide initiator, accelerator and inhibitor, and has high wettability) and capillary properties, as well as self-hardening properties, and has a high wettability and hardening properties, as well as the ability of self-hardening and hardening; the absence of oxygen. In the process of impregnation, the impurity composition, forced out the air from the pores of the circle, on. In addition, in the absence of oxygen and in a spasopure, temperatures between 15 and 35 ° C solidify, providing a mono-grade abrasive tool. This increases the variability and, therefore, the cToiiKOCTb of the circle during eio operation. The increased capillary properties of the anaerobic material it is necessary to produce a complete and uniform filling of the pores of the circle with the proposed composition. In addition, the proppunitive composition, which is higher than that of the air, is leplononapolnost provides a high cooling rate of cutting grain of the circle, helps to increase the proportion of geple leaving the circle during grinding and, thus, reduces the heat resistance of the grinding process. . At a temperature in the grinding zone of 450- 550 ° C, during processing, the polymer is decomposed (thermal oxidation, destruction) with H1og, choking, and eergy, which further reduces the temperature in the grinding zone. During the degradation of the polymer impregnator, various oxidation products are also formed (| - hydroperoxides, radicals, etc.), KcjTopbie, proves to have a weak etching effect on the metal surface being treated, reduce cutting forces and, in combination with molybdenum diselenide, serve as solid lubricant when grinding, reducing the friction system circle - processed material.

Molybdenum diselenide, being in the form of point inclusions in the matrix of cured polymer, during grinding reduces the coefficient of friction.

The components of the impregnator are interconnected. Application as part of the impregnator "Anderm-1u, possessing

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five

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five

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five

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high capillary properties, allows even and fully distribute molybdenum diselenide particles in the pores of the circle. The Aaterm-1 material itself does not sufficiently reduce the coefficient of friction in the processing zone, which required the introduction of a component with strong anti-friction properties - molybdenum diselenide.

The established quantitative content of solid lubricant (molybdenum diselenide) is optimal, since decreasing its content increases the coefficient of friction, and increasing increases the strength of the cured polymer material and its rapid wear and tear occurs when the tool is in operation. Optimal conditions for the operation of an abrasive tool are provided by a set of interrelated properties of the impermeable material and solid lubricant in the quantity offered.

To prepare the impregnator, heated to the material "Anaterm-1u (but not a solution), which is a homogeneous liquid, is added to I, 1 dispersed powder of molybdenum dislenide in the amount of 30%. The mixture is thoroughly mixed. Molybdenum diselenide is present in the composition as a suspension.

The introduction of the impregnator into the abrasive-free 1 nd instrument is made by slow (at a rate of 1-2 mm / sec) immersing the abrasive wheels heated to 40 ° C into the solution of the electrically driven device due to the free capillary raising of the impregnating composition in the pores of the circle. The impregnation time is 5--10 missions depending on the shape and size of the circle. After impregnation of the circle, the supercake is subjected at 70–80 ° C for 4–5 h; 1; accelerates the polymerization process.

D; | I determine the optimal content of the components; several impregnator compositions were made (Table 1).

For dapic compositions O11, the resistance of the abrasive wheel is determined, the specific productivity of the surface and roughness of the treated surface.

The stability of the abrasive wheel was determined by the time the circle worked between revisions (min). The specific productivity of the centering process is based on the ratio over the period of durability of the circle, where P "and Rcr are the weight of the removed metal and the abrasive consumed.

The quality of processing is determined but the surface roughness and the presence of burns on the surface being sharpened.

The proposed greenhouse was tested when machining R6M5 tool high speed steel (HRC 64-65). High-speed steel P6M5 (Table 2) belongs to the class of hard-to-grind materials due to the high content of vanadium due to the scarcity of tungsten. In addition, additional tests were carried out on the proposed composition of the impregnator during the processing of 12XA and ShKh15SG steel.

tests are given in

The results table. 2 and 3.

Thus, from the test results it follows that the proposed composition, in comparison with the known, increases the durability of the wheels when machining nickel-chromium, ball-bearing and high-speed steels by 30-40%.

The surface roughness is reduced by 1 cell. when using the proposed composition. At elevated grinding conditions with an increase in the cross feed of 0.6 mm / two turns, the use of circles impregnated with known compositions leads to the appearance of burn marks on the treated surface, while applying the same

Molybdenum diselenide

Anaerobic material Anaterm-Gu

20

25

thirty

35

40

Up to 100 Up to 100 Up to 100 Up to 100 Up to 100

1 2 3

four

Known composition (prototits)

circles impregnated with the proposed composition, no burns.

Claims (1)

Invention Formula An abrasive tool impregnator containing a self-curing polymer, characterized in that, in order to improve the durability of the abrasive tool and the quality of the treated surface, it additionally contains molybdenum diselenide, and as an self-curing polymer, anaterm-1y with the following ratio of ingredients, wt.%: Molybdenum diselenide25-35 “Anatherm-1u Else. Table 1 25 thirty 35 40 table 2 0.80 0.63 0.63 0.63 0.63 1.25 There is no minor burnout. 89 112 51 Table 3 0.63 0.32 0.63