SU946875A1

SU946875A1 - Multielectrode tool for electric discharge piercing of holes

Info

Publication number: SU946875A1
Application number: SU792848402A
Authority: SU
Inventors: Юрий Яковлевич Близнюк; Николай Михайлович Баев; Леонид Афанасьевич Овечкин
Original assignee: Предприятие П/Я А-7204
Priority date: 1979-12-07
Filing date: 1979-12-07
Publication date: 1982-07-30

Description

Изобретение относится к электроэрозионной обработке и может быть использовано в станках для одновременной прошивки большого числа отверстий стержневыми электродами.The invention relates to electrical discharge machining and can be used in machine tools for simultaneous flashing of a large number of holes with rod electrodes.

Известен многоэлектродный инструмент, ⁵состоящий из двух параллельно расположен• ных и перемещающихся навстречу друг дру-гу подэлектродных плит, имеющих соосные отверстия для прохода электродов. Верхняя плита содержит элементы крепления в ,0 ней электродов, и соединена с приводом. рабочей подачи электродов на деталь, а нижняя, неподвижная, служит для направления электродов [1].A multi-electrode tool is known, ⁵ consisting of two parallel-arranged and moving toward each other sub-electrode plates with coaxial holes for the passage of electrodes. The top plate contains fastening elements in, 0 it electrodes, and is connected to the drive. working supply of electrodes to the part, and the lower, fixed, serves to direct the electrodes [1].

Недостатком известной конструкции является то, что электроды зажимаются раз- дельно, что затрудняет сборку и разборку инструмента.A disadvantage of the known construction is that the electrodes are clamped separately, which makes assembly and disassembly of tools difficult.

Цель изобретения — сокращение времени на закрепление и замену электродов.The purpose of the invention is to reduce the time for fixing and replacing the electrodes.

Поставленная цель достигается тем, что 20 элементы крепления выполнены в виде тонкостенных втулок с упругой стенкой типа цанг и размещены в.отверстиях нижней плиты, которые выполнены коническими, а меж2This goal is achieved by the fact that 20 fastening elements are made in the form of thin-walled bushings with an elastic wall such as collets and are placed in the holes of the bottom plate, which are made conical, and between 2

ду первой плитой и торцами втулок расположены пружины, создающие усилие зажима электродов при сближении плит.The first plate and the ends of the sleeves are springs that create the clamping force of the electrodes when the plates approach.

Такая конструкция позволяет осуществлять зажим и разжим всех электродов одновременно.This design allows clamping and unclamping of all electrodes simultaneously.

На фиг. 1 изображен многоэлектродный инструмент с зажимными элементами — лепестковыми цапгами; на фиг. 2 — вариант исполнения многоэлектродного инструмента с зажимными элементами — коническими разрезными кольцами.FIG. 1 shows a multi-electrode tool with clamping elements - petal dips; in fig. 2 - a variant of the multi-electrode tool with clamping elements - conical split rings.

Многоэлектродный инструмент (фиг. 1), 'состоит из параллельных плит 1 и 2, зафиксированных относительно друг друга посредством пальцев 3 и винта 4 с шайбой 5, причем плита 1 для технологичности выполнена сборной из собственно плиты 1 и закрепленной на ней известным способом пластины 6 и имеет для обеспечения жесткой связи со станком хвостовик 7, закрепленный в отверстии плиты 1 гайкой 8, а плита 2 имеет возможность перемещения относительно плиты 1 при вращении винта 4, в соосные отверстия плит 1 и 2 установлены тонкостенные втулки, которые выпол946875Multielectrode tool (Fig. 1), 'consists of parallel plates 1 and 2, fixed relative to each other by means of fingers 3 and screw 4 with washer 5, and plate 1 for manufacturability is made of the assembly of plate 1 itself and plate 6 fixed on it in a known manner and to ensure tight coupling with the machine tool, the shank 7, fixed in the hole of the plate 1 by the nut 8, and the plate 2 has the ability to move relative to the plate 1 when the screw 4 rotates, thin-walled bushings are installed in the coaxial holes of the plates 1 and 2, which are 946875

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йены в виде четырехлепестковых цанг 9, зажимающих элементарные электроды 10 под действием упругих элементов-пружин 11 сжатия, установленных между пластиной 1 и цангами 9. Пружины 11 необходимы для компедсации погрешностей, возникающих при изготовлении цанг 9 и сопрягаемых с ними конусных отверстий в плите 2.Yen in the form of four-collet collets 9, clamping the elementary electrodes 10 under the action of elastic compression spring elements 11, installed between plate 1 and collet 9. Springs 11 are necessary for combining the errors that occur during the manufacture of collet 9 and mating conical holes in plate 2 with them.

Многоэлектродный инструмент (фиг. 2) отличается от описанного лишь тем, что зажимные элементы установлены в соосные отверстия только плиты 2 и что в качестве зажимных элементов использованы конические разрезные кольца 12, а в качестве упругих элементов — тарельчатые пружины 13, а также отсутствием пальцев 3 ввиду достаточной жесткости зажимных элементов.The multielectrode tool (Fig. 2) differs from the one described only in that the clamping elements are installed in coaxial holes of only the plate 2 and that conical split rings 12 are used as the clamping elements, and disc springs 13 as the elastic elements, as well as the absence of pins 3 due to the sufficient rigidity of the clamping elements.

Закрепление электродов производится следующим образом (фиг. 1).The fixing of the electrodes is as follows (Fig. 1).

Весь инструмент с помощью хвостовика 7 устанавливается либо в шпинделе станка, ²либо в специальном приспособлении. Затем гайка 4 отворачивается, электроды вставляют в цанги 9 и выравнивают их концы, например, упирая их в стол станка. Затем зажимают гайку 4, плита 2 движется вверх ₂к плите 1, цанги 9 упираются в пружины 11 и зажимают электроды.The entire tool with the help of the shank 7 is installed either in the spindle of the machine, ² or in a special device. Then the nut 4 is turned away, the electrodes are inserted into the collet 9 and align their ends, for example, resting them on the table of the machine. Then clamp the nut 4, the plate 2 moves up ₂ to the plate 1, the collet 9 abut against the spring 11 and clamp the electrodes.

Работа инструмента (фиг. 2) происходит аналогично.The operation of the tool (Fig. 2) is similar.

Использование многоэлектродного инструмента предлагаемой конструкции обес- ³печивает сокращение длительности сборки иUsing the proposed design tool multielectrode obes- reduction assembly ³ ensures, duration and

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разборки многоэлектродного инструмента в 5—10 раз; длительную работу без замены электродов, поскольку возможно использование электродов, длина которых в 100 и более раз больше их диаметра; экономичное использование материала электродов, поскольку отходы составляют не более 10% от длины электродов.disassembling a multielectrode tool 5–10 times; long-term operation without replacing the electrodes, since it is possible to use electrodes whose length is 100 or more times their diameter; economical use of the material of the electrodes, since the waste is not more than 10% of the length of the electrodes.

Claims

(54) MULTI-ELECTRODE INSTRUMENT FOR ELECTRO-EROZION STEELING HOLES The invention relates to EDM treatment and can be used in machine tools for simultaneous flashing of a large number of holes with rod electrodes. A multi-electrode tool is known, consisting of two parallel-arranged and moving towards each other — PG sub-electrode plates having coaxial holes for the passage of electrodes. The top plate contains an element: mounting electrodes in it, and is connected to the drive of the working supply of electrodes to the part, while the bottom one is fixed to guide the electrodes 1. A disadvantage of the known construction is that the electrodes are clamped separately, which makes assembly and disassembly difficult . The purpose of the invention is to reduce the time for fixing and replacing the electrodes. The goal is achieved by the fact that the fastening elements are made in the form of thin-walled bushings with an elastic wall such as collets and are placed in the orifices of the bottom plate, which are made conical, and springs are located between the first plate and the ends of the electrodes when the plates are drawn together. This design allows clamping and unclamping of all electrodes simultaneously. FIG. I depicts a multi-electrode tool with clamping elements - petal dips; in fig. 2 shows an embodiment of a multi-electrode tool with clamping elements — conical split rings. A multielectrode tool (Fig. 1) consists of parallel plates 1 and 2 fixed relative to each other by means of fingers 3 and a screw 4 with a tongue 5, and the plate 1 for processability is made of the assembly of the plate 1 itself and the plate 6 fixed on it in a known manner To ensure tight connection with the machine tool, the shank 7 is fixed in the hole of the plate I with the nut 8, and the plate 2 has the ability to move relative to the plate 1 when the screw 4 rotates, thin-walled bushings are installed in the coaxial holes of the plates 1 and 2 S in the form of four-petal collets 9, clamping the elementary electrodes 10 under the action of elastic elements-compression springs 11 installed between the plate 1 and the collets 9. The springs 11 are necessary to compensate for errors occurring in the manufacture of the collets 9 and the conical holes corresponding to them in the plate

2. A multielectrode tool (Fig. 2) differs from the one described above in that the clamping elements are installed in coaxial holes of only 2s and that conical split rings 12 are used as clamping elements, and disc springs 13 are used as elastic elements, as well as pins 3 due to sufficient rigidity of the clamping elements. The fixing of the electrodes is performed as follows (Fig. 1). The entire tool with the help of the shank 7 is installed either in the machine tool grinding section, or in a special tool. Then the nut 4 is turned away, the electrodes are inserted into the collet 9 and align their ends, for example, they abut the machine table. Then the nut 4 is clamped, the plate 2 moves up to the plate 1, the collets 9 rest against the springs 11 and clamp the electrodes. The operation of the tool (Fig. 2) is similar. The use of a multi-electrode tool of the proposed design, and provides a reduction in the duration of the assembly and disassembly of the multi-electrode tool by 5-10 times; long work without replacing the electrodes, since it is possible to use electrodes whose length is 100 or more times larger than the diameter; economical use of electrode material, since waste is no more than 10% of the length of the electrodes Claims of the invention Multi-electrode tools for electroerosive opening bores, consisting of two steam grinders having coaxial holes and for placing electrodes, clamping IX using fastening elements in which one plate is connected with the drive of the supply, and the second, immovable, serves to direct the fact that, by means of the electrodes, I am distinguished by reducing the time required for fixing and replacing the electrodes; made in the form of nostennyh sleeves with elastic wall type of collets and placed in the holes of the lower g and you are made conical, and between the movable plate and the ends of the sleeves are inserted into the tool springs designed to create an effort to force at the approaching. Sources of information taken in the attention during the examination 1. Author (; e certificate of the USSR Law 112026, cl. 23 1/12. 1957.