SU902933A1

SU902933A1 - Apparatus for expanding tubes

Info

Publication number: SU902933A1
Application number: SU802940370A
Authority: SU
Inventors: Евгений Александрович Коржавин
Original assignee: Научно-Исследовательский Отдел 8320 Предприятия П/Я Р-6115
Priority date: 1980-06-13
Filing date: 1980-06-13
Publication date: 1982-02-07

Description

(54) УСТРОЙСТВО ДЛЯ РАЗВАЛЬЦОВКИ ТРУБ(54) DEVICE FOR EXTENSION OF PIPES

1one

Изобретение относитс к области соединени труб с арматурой или трубными решетками методом обработки давлением.This invention relates to the field of joining pipes to reinforcement or tube sheets by a pressure treatment method.

Известно устройство дл развальцовки труб, содержащее смонтированные в корпусе деформирующие ролики, взаимодействующие с конусной оправкой и установленный соосно оправке зажимной механизм с элементами захвата 1.A device for flared tubes is known, comprising deforming rollers mounted in a housing that cooperate with a tapered mandrel and a clamping mechanism mounted coaxially with the mandrel with gripping elements 1.

При соединении труб с арматурой это устройство не гарантирует отсутствие между ними осевого зазора.When connecting pipes to fittings, this device does not guarantee the absence of an axial gap between them.

Целью изобретени вл етс повышение качества соединени путем устранени возможности осевого смещени трубы за счет прижима ее торца к соедин емой детали.The aim of the invention is to improve the quality of the joint by eliminating the possibility of axial displacement of the pipe by pressing its end against the part being joined.

Поставленна цель достигаетс тем, что в известном устройстве, содержащем смонтированные в корпусе деформирующие ролики , взаимодействующие с конусной оправкой и установленный соосно оправке зажимной механизм с элементами захвата, зажимной механизм снабжен устройством дл перемещени трубы в осевом направлении , выполненным в виде установленных с двух сторон относительно элемента захвата пружин, и проход щей внутри них т ги, одним концом соединенной с конической оправкой с возможностью вращени относительно нее, и несущей на другом конце опорный бурт дл размещени пружины, установленной со стороны, противоположной оправке.The goal is achieved by the fact that in a known device, comprising deforming rollers mounted in a housing, interacting with a conical mandrel and a clamping mechanism mounted coaxially with the mandrel with gripping elements, the clamping mechanism is equipped with a device for moving the pipe in the axial direction, made in the form of element gripping the springs, and passing inside them of the gi, one end connected to the conical mandrel rotatably relative to it, and bearing on the other The m end is a support shoulder for accommodating a spring installed on the side opposite to the mandrel.

При этом элемент захвата выполнен в виде тарельчатой пружины.In this case, the gripping element is made in the form of a cup spring.

На чертеже показано устройство, продольный разрез.The drawing shows the device, a longitudinal section.

Устройство дл развальцовки труб состоит из деформирующих роликов 1, расположенных в окнах корпуса 2 и опирающихс на оправку 3 с обратным конусом. Тарельчата пружина 4, выполн юща роль элемента захвата, св зана с оправкой устройством дл подт гивани трубы, содержащим т гу 5 с опорным буртом а, коней которой заделан в оправку с возможностью вращени , спиральные пружины 6, 7, опорную щайбу 8 и разделительные щайбы 9. Характеристики пружин подобраны из услови их последовательного включени в работу .The tube flaring apparatus consists of deforming rollers 1, located in the windows of the housing 2 and resting on the mandrel 3 with a reverse cone. The trailed spring 4, which acts as a gripping element, is connected to the mandrel by means of a pipe tightening device, comprising a pull 5 with a support collar a, whose horses are rotatably embedded in the mandrel, coil springs 6, 7, support plate 8 and separation shields 9. Characteristics of the springs are selected from the conditions of their sequential inclusion in work.

Claims

The device works as follows. The device is inserted into the machined pipe 10 installed in the hole of the part 11 with the restrictive shoulder 12. The mandrel, rotating and simultaneously moving in the direction of arrow A, is brought into engagement with the deforming rollers and pushed them apart. At the same time, the thrust movement, reduction of the length of its free end and the sequential compression of the springs occur. The spring is compressed first. Increasing its outer diameter, it comes into contact with the inner surface of the pipe. Continuing axial movement of the mandrel in the presence of a gap between the end of the pipe and the restrictive collar of the part leads to compression of the spring 6 and displacement of the disc spring together with the pipe held by friction in the direction of the arrow A. When the end of the pipe touches the restrictive shoulder of the part, compression of the spring 6, displacement of the disc spring and the pipe stops Further movement of the mandrel until the rollers come to a given size in the working position is accompanied by compression of the spring 7. After rolling the mandrel one to the initial position, releasing the springs 4, 6, 7. At the disc spring, the outer diameter decreases and it comes out of contact with the inner surface of the pipe. The use of devices with mandrels equipped with a reverse cone makes it possible to combine the direction of movement of the pipe with the direction of the axial working movement of the mandrel and use the latter as a drive. Securing the rod 5 rotatably ensures that the gripping elements are in contact with the pipe and holding it under the conditions of rotation of the conical mandrel. There are various options for the device. The clamping mechanism along the inner surface of the pipe can be performed, for example, in the form of one-arm or two-arm arms interacting with a special conical surface on the moving pipe. In devices for expanding using a working agent in the form of a liquid or gas to act on the deforming rollers, the clamping mechanism can be made in the form of a hollow chamber with elastically deformable walls, allowing, due to pressure, to increase the outer diameter of the chamber and bring it into contact with the inner surface of the pipe . The proposed device ensures that the pipe is pressed against the restrictive flange of the part and eliminates the formation of a gap between the irons during the flaring process. Claim 1. A device for flared tubes in a hole of a connected part, comprising deforming rollers mounted in a housing, cooperating with a conical mandrel and a clamping mechanism mounted coaxially with the mandrel, characterized in that, in order to increase the quality of the joint by eliminating the possibility of axial the displacement of the pipe, the clamping mechanism is equipped with a device for moving the pipe in the axial direction, made in the form of installed on both sides relative to the spring gripping element And extending within them rods having one end connected to the conical mandrel rotatably relative thereto and carrying at the other end a support shoulder for receiving a spring mounted on the side opposite the mandrel.

2. A device according to claim 1, characterized in that the gripping element is made in the form of a cup spring. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 626862, cl. B 21 D 41/02, 11.04.77 (prototype).