SU814519A1

SU814519A1 - Apparatus for expanding bent tubes

Info

Publication number: SU814519A1
Application number: SU792761690A
Authority: SU
Inventors: Владимир Михайлович Бойко
Original assignee: Научно-Исследовательский Отдел Нио- 8320 Предприятия П/Я P-6115
Priority date: 1979-05-03
Filing date: 1979-05-03
Publication date: 1981-03-23

Description

Изобретение относится к раздаче труб развальцовкой.The invention relates to the distribution of pipes by flaring.

Известно устройство цля развальцовки изогнутых труб, содержащее сепаратор с размещенными в нем роликами и конической оправкой с закрепленным на ее конце гибким элементом, удерживающим ролики от западания внутрь сепаратора£1/].A device is known for expanding bent pipes, comprising a separator with rollers placed in it and a conical mandrel with a flexible element fixed at its end, which holds the rollers from dropping inside the separator £ 1 /].

Недостатком этого устройства является сложность конструкции элемента «для удержания роликов от западания. Выпол- ^,0нение соединительных отверстий в небольших по размеру (1,5-4 мм) стальных шариках усложняет технологию изготовления инструмента.The disadvantage of this device is the complexity of the design of the element "to keep the rollers from sinking. ^{Performed, 0} nenie connecting holes in the small-size (1.5-4 mm) steel balls complicates the technology of making the tool.

Цель изо.бретения-упрощение конструк^* ции устройства. *The purpose of the invention is to simplify the design of the device. *

Поставленная цель достигается тем, что элемент удерживающий ролики от западания внутрь сепаратора, выполнен в вице спирали.This goal is achieved by the fact that the element holding the rollers from dropping inside the separator is made in a vice spiral.

Такое исполнение упрощает конструкцию устройства и уменьшает трудоемкость ее изготовления.This design simplifies the design of the device and reduces the complexity of its manufacture.

На чертеже изображено устройство цля развальцовки изогнутых труб.The drawing shows a device for expanding bent pipes.

Устройство содержит корпус 1, в котором соосно на подшипнике 2 установлен сепаратор 3 с размещенными в нем роликами 4. Внутри сепаратора 3 телескопически установлена оправка 5, передняя часть ее выполнена конической формы с углом конуса 2 - 6°. На конце конической части оправки 5 закреплена спираль 6, оканчивающаяся бобышкой 7 из антифрикционного материала, например капрона. Спираль выполнена из стальной проволоки плотной навивкой. Наружный диаметр спирали 6 выбирается из учета свободного продвижения сепаратор» 3 с роликами по внутреннему диаметру трубы. Для удержания оправки 5 в исходном состоянии она подпружинена относительно корпуса пружиной 8.The device comprises a housing 1, in which a separator 3 with rollers 4 mounted therein is mounted coaxially on the bearing 2. A mandrel 5 is telescopically mounted inside the separator 3, its front part is conical in shape with a cone angle of 2-6 °. At the end of the conical part of the mandrel 5, a spiral 6 is fixed, ending in a boss 7 of an antifriction material, for example, a capron. The spiral is made of tightly wound steel wire. The outer diameter of the spiral 6 is selected based on the free movement of the separator "3 with rollers on the inner diameter of the pipe. To keep the mandrel 5 in its original state, it is spring loaded relative to the housing by a spring 8.

Устройство работает следующим образом.The device operates as follows.

Сепаратор 3 устройства вводится внутрь трубы 9 с надетым на нем ниппе3 лем 10. При этом ролики 4 опираются на спираль 6. Оправке 5 придается вращательное и осевое движение. Коническая часть оправки 5 проходит между роликами 4, раздвигает и приводит их во вращательное движение. Ролики 4 обкатываются по внутренней поверхности трубы и раскатывают ее. Закрепленная на конце оправки 5 спираль 6, продвигаясь вместе с ней, выходит за пределы сепаратора 3. Закрепленная на конце спирали 6 бобышка 7 доходит до изогнутой стенки- трубы 9 и скользит по ней. При этом спираль изгибается и не поепятствует движению оправки 5. По окончанию раскатывания оправка отводится в исходное состояние, ролики опускаются на поверхность спирали и удерживаются от' западания внутрь сепаратора.The separator 3 of the device is introduced into the pipe 9 with the nipple 3 put on it 10. In this case, the rollers 4 are supported by a spiral 6. The mandrel 5 is provided with rotational and axial movement. The conical part of the mandrel 5 passes between the rollers 4, spreads and drives them in a rotational motion. The rollers 4 run on the inner surface of the pipe and roll it. The spiral 6 fixed at the end of the mandrel 5, moving along with it, goes beyond the separator 3. The boss 7 fixed at the end of the spiral 6 reaches the curved wall of the pipe 9 and slides along it. In this case, the spiral bends and does not interfere with the movement of the mandrel 5. At the end of rolling, the mandrel is retracted to its original state, the rollers are lowered to the surface of the spiral and are kept from falling into the separator.

Опробование устройства показало надеж- 20 ность конструкции, отличное качество рас814519 4 катывания трубопровода с (иинимальными размерами радиусов гибки. Выполнение элемента, удерживающего ролики от западания, в виде спирали упростило техно5 логический процесс и уменьшило трудоемкость изготовления.Testing of the device showed the reliability of the structure, excellent quality of rolling the pipeline with (the minimum dimensions of the bending radii. The design of the element that holds the rollers from falling in the form of a spiral simplified the technological process and reduced the complexity of manufacturing.

Claims

The image refers to the distribution of pipes by flaring. A device for expanding bent-shaped roughs is known, which contains a separator with a spliced roller and a mandrel with a flexible element fixed at its end, which keeps the rollers from becoming blocked inside the separator l. The disadvantage of this device is the complexity of the design of the element, to keep the rollers from falling. Making the connecting holes in small steel balls (1.5-4 mm in size) complicates the manufacturing technology of the tool. The purpose of iso-embedding is to simplify the design of the device. The goal is achieved by the fact that the element holding the rollers from falling into the inside of the separator is made in the form of a spiral. This design simplifies the design of the device and reduces the complexity of its manufacture. The drawing shows a device for flaring curved trunks. The device includes a housing I, in which a separator 3 is mounted coaxially on the bearing 2 with rollers 4 placed inside it. Inside the separator 3, the mandrel 5 is telescopically mounted, its front part is conical in shape with a cone angle of 2 to 6. A spiral is fixed at the end of the conical part of the mandrel 5 6, terminating with a boss 7 of antifriction material, for example, nylon. The spiral is made of steel wire tightly wrapped. The outer diameter of the helix 6 is selected from the consideration of free movement of the separator 3 with rollers along the inner diameter of the pipe. To keep the mandrel 5 in the initial state, it is spring-loaded with respect to the body by the spring 8. The device operates as follows. The separator 3 of the device is inserted into the pipe 9 with the nipple 10 mounted on it. In this case, the rollers 4 rest on the helix 6, the mandrel 5 is attached to the rotational and axial movement. The conical part of the mandrel 5 passes between the rollers 4, pushes them apart and causes them to rotate. The rollers 4 roll around the inner surface of the pipe and roll it. The coil 6 fixed at the end of the coil and 5, moving along with it, extends beyond the bounds of the separator 3. The pin 7 attached at the end of the coil 6 reaches the curved wall of the pipe 9 and slides along it. In this case, the coil is bent and does not interfere with the movement of the squiggle 5. At the end of the rolling, the mandrel is withdrawn to the initial state, the rollers are lowered onto the surface of the coil and kept from falling into the inside of the separator. Testing the device showed the reliability of the design, the excellent quality of expanding the pipeline with (minimum dimensions of the radii of bending. Performing the element holding the rollers from aapadani in the form of a spiral simplified the technological process and reduced the laboriousness of manufacturing. The formula of the invention. A device for flaring curved pipes containing located in the housing there is a separator with rollers and a conical mandrel placed in it with a flexible element fixed at its end, which keeps the rollers from being wound inside v separator, characterized in that in order to simplify the design-ii, flexible element is configured as spiral vice. Sources of information received, into account in the examination I. U.S. Patent N 3641798, cl. 2 ID 39 / about 1972.