RU2200081C2 - Composition for making abrasive tool - Google Patents

Abstract

FIELD: manufacture of abrasive tool, namely cutting off and grinding discs with vulcanite binder. SUBSTANCE: composition includes grinding material and organic binder containing low-molecular rubber, sulfur, 2- mercaptobenozthiasole and high-molecular butadiene rubber. In description of invention relation of ingredients is given. EFFECT: enhanced wear resistance, lowered cost price of tool. 5 cl, 4 ex, 2 tbl

Description

 The invention relates to the production of an abrasive tool for grinding, cutting and cutting metal products, namely, a composition for the manufacture of cutting and grinding wheels on a volcanic (organic) bond.

 A known composition for the manufacture of an abrasive tool with the following set of essential features: contains grinding material and an organic binder, including low molecular weight rubber, sulfur, 2-Mercaptobenzthiazole, high molecular weight synthetic rubber butadiene brand SKDSR-1gp. with a content of 1, 2 units of at least 70 wt.% (patent RU 2082597 C1, 06/27/1997, CL 24 D 3/22).

 The disadvantage of the prototype is the low wear resistance of the tool, the use in its composition of severely deficient, expensive and environmentally harmful materials.

 The objective of the invention is to increase the wear resistance of the tool, which is characterized by the operating time (the number of cutting blanks), as well as the withdrawal from the composition of severely deficient, expensive and harmful components.

A composition for the manufacture of an abrasive tool is proposed, containing grinding material and an organic bond including low molecular weight rubber, sulfur, 2-Mercaptobenzthiazole and high molecular weight synthetic rubber butadiene grade SKDSR-1 gr. with a content of 1.2 links of not less than 70 wt.%, while the grinding material was selected with a grain size of 160-6, and low molecular weight rubber - brand SKN-18-1A, with the following ratio of the components in wt. hours:
Grinding material - 1050-1150
Rubber SKDSR-1 gr. - 77.69-88.88
Rubber SKN-18-1A - 19.41-22.20
Sulfur - 46.12-55.00
2-Mercaptobenzthiazole - 1.96-2.20
The grinding material is selected grades 14A, 25A.

 To obtain the proposed composition, three mixtures of ingredients are prepared with saturation with grinding material grade 14A, grain size 40-N (minimum, optimal, maximum) containing a mass in wt. h

 First: Rubber SKDSR-1 gr. - 88.88; Rubber SKN-18-1-A - 22.20; Sulfur - 55.00; 2-Mercaptobenzthiazole - 2.20; Grinding material grade 14A grit 40-N - 1050.

 Second: Rubber SKDSR-1 gr. - 80.00; Rubber SKN-18-1A-20.00; Sulfur - 50.00; 2-Mercaptobenzthiazole - 2.00; Grinding material grade 14A with a grain size of 40-H - 1100.

 Third: Rubber SKDSR - 1 gr. - 77.69; Rubber SKN-18-1A - 19.41; Sulfur - 46.22; 2-Mercaptobenzthiazole - 1.96; Grinding material grade 14A with a grain size of 40-H - 1150.

 Example: the optimal composition is made by mixing the weighed components on a roll equipment, where the homogeneity of the prepared mixture is achieved. Then, grinding material is introduced and, with thorough mixing, an abrasive mixture is obtained. The abrasive mixture is rolled on rollers and then rolled (calibrated) to obtain blanks of the required thickness. Circles are cut out from the billet blanks by a stamp, which, having undergone heat treatment at a temperature of 358-450K, take a fairly rigid structure, hardness and strength, i.e. necessary characteristics for cutting metal workpieces.

 It was experimentally established that the masses of the introduced components are: rubbers (77.69-88.88) and (19.41-22.20); Sulfur (46.12-55.00); 2-Mercaptobenzthiazole (1.96-2.20) and saturation with 14A grinding material with 40-N grit (1050-1150) increase the quality of the tool by improving wear resistance. Mixtures are technological and are easily processed on existing equipment.

 The ingredients included in the proposed and known compositions are shown in table 1.

 The properties of the abrasive tool - increased wear resistance (running hours - the number of cuts) are shown in table 2.

 Characteristics of the ingredients used.

 Rubber SKDSR (TU38.103284-85) is used as a binder component.

 Rubber SKN-18-1A (TU 38.103352-83) is also a binder component, in addition, it gives the necessary technological properties of the abrasive mixture.

 Sulfur (GOST 127-76) is a vulcanizing component.

 2-Mercaptobenzthiazole (GOST 739-74) vulcanization accelerator.

 Grinding material of grades 14A, 25A, etc. - abrasive GOST 26327-84).

Claims (1)

1. The composition for the manufacture of an abrasive tool containing grinding material and an organic binder, including low molecular weight rubber, sulfur, 2-mercaptobenzthiazole and high molecular weight synthetic rubber butadiene grade SKDSR-1 gr. with a content of 1, 2 links of at least 70 wt. %, characterized in that the grinding material is selected with a grain size of 160-6, and low molecular weight rubber - brand SKN-18-1A in the following ratio of composition components, wt. hours:
Grinding material - 1050 - 1150
Rubber SKDSR-1 gr. - 77.69 - 88.88
Rubber SKN-18-1A - 19.41 - 22.20
Sulfur - 46.16 - 55.00
2-Mercaptobenzthiazole - 1.96 - 2.20
2. The composition according to p. 1, characterized in that the grinding material is selected grades 14A, 25A.

Images