SU543066A1

SU543066A1 - Method of making brushes of electrical machines

Info

Publication number: SU543066A1
Application number: SU2151662A
Authority: SU
Inventors: Марк Леонидович Дридзо; Валерий Викторович Перцев; Владимир Николаевич Былинкин
Original assignee: Предприятие П/Я А-1837
Priority date: 1975-07-04
Filing date: 1975-07-04
Publication date: 1977-01-15

Description

1one

Изобретение относитс к области электротехники и нредназначено дл изготовле)и электрощеток из порошковых материалов с занрессованным токоподвод щим проводом.The invention relates to the field of electrical engineering and is intended for the manufacture of electrostatic brushes from powder materials with an inserted lead wire.

Известен способ изготовлени электрических щеток, нри котором токоподвод щий ировод заделывают в тело щетки одновременно с ее прессованием, носле чего щетку в зависимости от ее компоне 1тного состава подвергают (либо ие подвергают) дальнейщей термообработке ,н механически обрабатывают.A known method of manufacturing electric brushes, in which the current-conducting wire is embedded in the brush body at the same time as it is pressed, which, depending on its composition, is subjected to (or subjected to) further heat treatment and mechanically processed.

Так, наиример, известен сноеоб изготовлени металлографитиых щеток, содержаи1,их, иапример, медь, графит, свинец (щетки марок МГС-7, МГС-8 и др.), ири котором в матрицу засыпают нресспорощок, затем на новерхиость порошка вручиую, либо с помощью механизма укладывают два металлических проводника таким образом, чтобы они образовывали на поверхности норошка два полукольца , нанравленных закругленными участками к центру матрицы. Ири этом свободные концы проводов выход т за пределы .матрицы. Иосле чего в .матрицу досыпают ирессиоронюк и осун1ествл ют ирессова {ие блока. Онрессованный блок извлекают из матрицы и разрезают таким образом, чтобы нолучить две щетки , кажда из которых содержит заирессованпый в ее тело токоведущий провод (1).So, naimer, known for making metal graphite brushes, containing 1, them, for example, copper, graphite, lead (brushes of grades MGS-7, MGS-8, etc.), which, in the matrix, pour the powder into the matrix, then hand over the powder, or With the help of the mechanism, two metal conductors are laid in such a way that they form two half-rings on the surface of the hole, rounded to the center of the matrix. In this case, the free ends of the wires go beyond the matrix. Then, the iressionoruk is filled in the matrix and the block is pressed. The pressed block is removed from the die and cut in such a way as to obtain two brushes, each of which contains a current-carrying wire, which is pressed into its body (1).

Однако ири этом, во- 1срвых, требуетс значительна точность npi укладке провода в пресс-форму, так как в случае, если закругленна часть провода окажетс за серединой блока , на рабочую новерхность щетки будут выходить его концы. Это прпводит к быстрому выходу из стро коллектора. Во-вторых, если во избежание выхода обрезанных концов провода на рабочую новерхность HICTKH петлю образовывать недалеко от нерабочей части HteTKH, место заделки окажетс ослаб.ченпым и возможен выход н,етки из стро из-за вырыва провода из тела 1цетки во врем эксплуатации . В-третьих, укладка провода - процесс трудно механизируемый и. следовательно, сннжаюнип производительность.However, this, firstly, requires a high degree of accuracy in laying the wire into the mold, as if the rounded part of the wire is behind the center of the block, its ends will come out onto the working surface of the brush. This leads to a quick failure of the collector. Secondly, if in order to prevent the cut ends of the wire from reaching the working surface of HICTKH, a loop is formed not far from the non-working part of HTETKH, the place of seizure will be weakened and the outlet can be released, because the wire has been torn out of the 1-mesh body during operation. Thirdly, laying the wire is a process that is difficult to mechanize and. consequently, snjunip performance.

Известно применеине волокнистых углеродистых нитей в качестве ировода дл идеток из порошковых матерпалов (2). Но углеродистые ннти м гче медных, занравнть их в массу сложно, а зона заделки неонределенна. Поэтому дл заделки но указанному способу необходимо или нримен ть снецнальные нриснособлсн; , гарантирующие заделку на определенную глубину, нлн нроизводнть контро.ть и отбраковку Н1СТОК но зоне заделки. В обоих случа х технологи жнотовлени щеток сложна.It is known that carbon fiber filaments are used as an iron for the powder matterials (2). But carbon nanometers are softer than copper ones, it is difficult to put them on a mass, and the sealing zone is not defined. Therefore, to fix this method, however, it is necessary or need to have a complete design; , guaranteeing embedment at a certain depth, noting the counterproduction and rejection of NSTOK in the embedment zone. In both cases, brush technology is complex.

Claims

For the production of brushes H, the reliability of the seal of DOV01) is preferred; Agam method, which includes the operations of mixing the initial components, pressing in the mold with one-time embedding of brush wires, which use a harness from graphitized threads, and mechanical processing, simultaneously press the block, at least for two brushes, and the wire is arranged , so that it crosses the protruff-legged EtenKN matres of the nonres-form. The essence of the described method is described in the drawing. A mass of semi-finished product 3 (a mixture of initial burrs, a binder, additives, etc.) is placed in a matrix 1 with a movable lower punch 2, and a single wire of 5 carbon drinks is placed in the grooves 4 along the mat, filling the weight of the semi-finished product to a certain volume and pressing with the help of the upper pole. 6. The quality of the termination of the current-carrying wire is improved, since it is embedded in a greater length. Consequently, the strength of the seal is zelichen, and the electrical losses in it are cleared. At the same time, the current-carrying wire, which has been embedded for a long time, is in contact with particles of such well-conducting materials as copper, graphite and other materials that make up solid brushes. Therefore, all the layers of the brush are involved in current passage, the current collection has a normal, uniformly distributed character. The invention involves a method for preparing an electrical machine tool, which includes the operations of displacing initial components, pressing in a mold with simultaneous embedding of brush wires, which are made of graphite type tows, and jMexannial processing, which is designed to simplify the process of making brushes and sweeping brushes and sweeping brushes. the seals press the block, along the wires, simultaneously at least for two brushes, and it is specified that it crosses the wire so that. opposite walls of the mold mold. Sources of information taken into account in expert studies: 1. Drawing FM 599065, FM 7659065, “MGS-7 brand brush. but. Patent of France No. 1539022, cl. P 02K, 1967 (prototype).