SU931450A1

SU931450A1 - Abrasive tool production method

Info

Publication number: SU931450A1
Application number: SU803004760A
Authority: SU
Inventors: Николай Ваганович Манукян; Рубен Багратович Шатворян; Гаспар Саакович Апоян; Давид Грачевич Нерсесян
Original assignee: Ереванский политехнический институт им.К.Маркса
Priority date: 1980-11-18
Filing date: 1980-11-18
Publication date: 1982-05-30
Also published as: CS236937B1; CS736981A1

Description

1one

Изобретение относитс к изготовлению абразивного инструмента.The invention relates to the manufacture of an abrasive tool.

Известен способ изготовлени абразивного инструмента, при котором абразивные зерна располагают на основе, а ее помещают в форму и формообразуют совместно со св зующимГ .A known method of making an abrasive tool, in which the abrasive grains are placed on a base, and it is placed in a mold and shaped together with a binder.

Недостатком известного способа вл етс сложность, а следовательно, трудоемкость процесса фиксации абразивных зерен на фольге. Фиксаци зерен вдавливанием в фольгу не обеспечивает достаточной надежности. Поэтому необходимо примен ть специ .альные клекхцие вещества и соответствующую технологию. Кроме того, хот и достигают упор доченного распределени абразивных зерен в объеме абразивоносного сло , однако абразивные зерна расположены без геометрической ориентации относительно рабочей поверхности инструмента. Указанное значительно вли ет на качестThe disadvantage of this method is the complexity and, therefore, the complexity of the process of fixing abrasive grains on the foil. Grain fixation by pressing into the foil does not provide sufficient reliability. Therefore, it is necessary to use special cluxing substances and appropriate technology. In addition, although they achieve an ordered distribution of abrasive grains in the volume of the abrasive layer, the abrasive grains are located without a geometric orientation relative to the working surface of the tool. This has a significant effect on quality.

во абразивного инструмента, ограничивает его режущую способность.in the abrasive tool, limits its cutting ability.

Цель изобретени - повышение ( качества абразивного инструмента путем геометрической ориентации абразивных зерен относительно рабочей поверхности, снижение трудоемкости изготовлени инструмента.The purpose of the invention is to increase (the quality of the abrasive tool by geometrically orientation of the abrasive grains relative to the working surface, reducing the labor intensity of the tool.

Указанна цель достигаетс тем, что фиксирование абразивных зерен This goal is achieved by fixing abrasive grains

10 в основе-носителе зерен осуществл ют экструдированием последней совместно с абразивными зернами.10 in the base substrate, the grains are extruded together with abrasive grains.

Предусмотрена возможность последующей прокатки экструдированного The possibility of subsequent rolling extruded

ts материала в направлении экструзии.ts material in the direction of extrusion.

П р им е р. Изготавливают абра,зивный брусок 125x16x5 мм. алмазов марки АСС зернистостью 315/250 на металлической св зке Ml дл .круп гов ARC 2. PRI im p Make abra, zivny bar 125x16x5 mm. ACC diamonds with a grain size of 315/250 on Ml metal bond for ARC 2 groups.

Claims

As a base carrier material of abrasive grains, a mixture of paraffin and stearin (1: 1 by mass), with which diamond grains are mixed in a molten state (1: 1 ratio by mass). The specified plasticized mixture is extruded times when L 8 is compressed to obtain a uniform distribution of diamond grains in the plasticized mixture volume, as well as to ensure their orientation in the extrusion direction. Next, the extruded mass is rolled in the extrusion direction to obtain a sheet 0.5 mm thick, cut out of the obtained sheet strip size 125x5 mm, while the size of 5 mm is maintained in the direction of rolling. Then the relative displacement of the pudnson and the matrix creates a batch volume of the molding chamber, having a cross section of 125x5 mm in size, is poured, a portion of the binder is aligned, aligned, compacted, and a strip of grains (125x5 mm) is placed on the surface of the compacted binder. After a 16-fold repetition of the process, the multilayer mass is pressed under a pressure of 1600 kgf / cm, heated to 150-200 ° C and pressed under a pressure of 1bOO kgf / cm to partially remove the base material and fix the grains between the layers. Sintering is then carried out, in which the base is completely removed, and prepressing is carried out to obtain the final dimensions (125 x 1 x 5 mm). On the resulting briquette, the working surfaces are parallel to the direction of pressing. Next, a diamond bar casing is installed in the mold, a portion of the binder is poured to form a diamond-free layer, a sintered briquette of one working surface is installed, and sintering and repressing of the briquette bar is performed. In this case, the layer-oriented arrangement of the diamond grains in the briquette is not disturbed, since the latter is pre-sintered and pressed. The resulting diamond bar is mechanically fastened to the tool body. The proposed method allows easy geometrically oriented fixation of the abrasive grains on the basis of the carrier of the grains without the use of complex devices, providing improved quality of the abrasive tool. Extrusion of a viscous mass together with abrasive grains eliminates crushing of the grains and increases the degree of orientation, and ripokatka in the direction of extrusion in turn improves the orientation of the grains. Formula 1: A method of making an abrasive tool, in which abrasives / grains are fixed on a substrate and placed in a form with a binder, after which they are molded, characterized in that in order to improve the quality of the abrasive tool by providing an oriented arrangement of abrasive tools. grains, reducing the labor intensity of manufacturing the tool, fixing the abrasive grains on the base is carried out by extrusion of the latter together with abrasive grains.

2. The method according to claim 1, about tl and h ayusch and the fact that the extruded base is subjected to rolling in the direction of extrusion. . Sources of information taken into account in the examination 1. USSR author's certificate, cl. B 2 D 3/20, 1971.