SU893340A1

SU893340A1 - Apparatus for flaring tubes

Info

Publication number: SU893340A1
Application number: SU802929269A
Authority: SU
Inventors: Владимир Иванович Григорьев; Филипп Григорьевич Ермак; Усманг Гильметдинович Хайбуллин; Борис Юрьевич Лукин; Владислав Анатольевич Михайлов; Анатолий Георгиевич Поликарпов
Original assignee: Предприятие П/Я Р-6378
Priority date: 1980-05-23
Filing date: 1980-05-23
Publication date: 1981-12-30

Description

(54) УСТРОЙСТВО ДЛЯ РАЗДАЧИ ТРУБ(54) DEVICE FOR DISTRIBUTING PIPES

II

Изобретение относитс к методам изменени диаметра труб обработкой давлением.The invention relates to methods for changing the diameter of pipes by pressure treatment.

Известно устройство дл раздачи труб, со . держащее установленную в корпусе оправку с навитой на нее эластичной трубкой, один конец которой заглушен, а другой соединен с гидросистемой 1.A device for dispensing pipes is known. holding mandrel mounted in the housing with an elastic tube wound on it, one end of which is plugged and the other is connected to the hydraulic system 1.

Однако при раздаче известным устройством на внутренней поверхности труб могут образоватьс выступы в месте контакта трубы с участком сопр жени двух витков эластичной трубки.However, when dispensing with a known device, protrusions may form on the inner surface of the pipes at the point of contact of the pipe with the interface of two turns of the elastic pipe.

Цель изобретени - повышение качества издели путем обеспечени возможности перемещени оправки на половину шага витков .трубки дл повторной раздачи трубы в месте, где имеютс выступы.The purpose of the invention is to improve the quality of the product by allowing the mandrel to be moved by half the pitch of the turns of the tube for re-dispensing the pipe in the place where the projections are located.

Поставленна цель достигаетс тем, что устройство , содержащее установленную в корпусе оправку с навитой на нее эластичной трубкой, один конец которой заглушен, а другой соединен с гидросистемой, снабжено жестко закрепленной в корпусе по оси устроства штангой , на которой подвижно в осевом направ ,лешш смонтирована оправка, и приводом перемещени оправки .The goal is achieved by the fact that the device containing a mandrel mounted in the housing with an elastic tube wound on it, one end of which is plugged and the other connected to the hydraulic system, is equipped with a rod fixedly mounted in the housing axially on which is movable in the axial direction, the shaft is mounted mandrel; and driven displacement mandrel.

При этом привод перемещени оправки может быть вьшолнен в виде жестко св занного с оправкой поршн и размещенного в корпусе цилиндра.In this case, the drive of the movement of the mandrel may be implemented in the form of a piston rigidly connected with the mandrel and a cylinder placed in the housing.

На фиг. 1 показано устройство, продольный разрез; на фиг. 2 - разрез А-А на фиг. 1.FIG. 1 shows a device, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

Устройство состоит из штанги 1, оправки 2, эластичной трубки 3, размещенной на оправке между регулируемыми упорами 4 и 5, полуматриц 6 с механизмом их запирани (не показан). Привод оправки вьшолнен в виде неподвижного цилиндра 7 с порщнем 8, шток которого соединен с оправкой 2. Один конец The device consists of a rod 1, a mandrel 2, an elastic tube 3 placed on a mandrel between adjustable stops 4 and 5, semi-matrix 6 with a mechanism for locking them (not shown). The drive of the mandrel is made in the form of a stationary cylinder 7 with a piston 8, the rod of which is connected to the mandrel 2. One end

15 9 злacти шoй трубки заглушен и подпружинен с оправкой посредством пружины 10, второй 11 - закреплен на оправке и соединен с гидросистемой высокого давлени . Оправка имеет возможность перемещатьс до joiopa 12, а в другую сторону до корпуса 13.15 9 the best of the tube tube is plugged and spring-loaded with the mandrel by means of a spring 10, the second 11 is fixed on the mandrel and connected to a high-pressure hydraulic system. The mandrel has the ability to move up to joiopa 12, and in the other direction to the body 13.

Трубна заготовка 14 установлена неподвижно.Pipe blank 14 is fixed.

Claims

A device for dispensing thin-walled tubes works as follows. In the absence of fluid pressure in the elastic tube 3, by means of the stops 4 and 5, adjust its length so that the coils are not (the gaps between them are evenly located on the mandrel along its entire length. The billet 14 is mounted on the mandrel, covered with outer matrix with half matrix 6 and locked Through the fixed end And supply high-pressure liquid to the elastic tube 3. Until the gap between the inner wall of the billet and the turns of the elastic tube is eliminated, this pressure is displaced turns relative to the mandrel. This movement increases from zero to one at the fixed end of the elastic tube to the maximum at its free end. Moving the free end of the elastic tube causes the spring 10 to stretch beyond the bottom of the spring until the gap between internal surfaces is eliminated half-matrix 6 and the outer surface of the billet 14. Remove the pressure of the liquid in the elastic tube 3, and under the action of the spring 10 its turns return to the original Yolosh The pressurized fluid is supplied to the right piston cavity of the cylinder 7, and the piston 8 with the rod transfers the mandrel 2 up to the stop 12 bolts 1. This movement is equal to one half of the pitch of the helical spiral of the elastic tube 3. To eliminate possible irregularities between the turns of the tubular billet The process of distributing it in the described sequence. Relieve fluid pressure in an elastic tube. Having supplied the liquid to the reciprocating cavity of the cylinders {) a 7, the mandrel is returned to its original position - until the piston rod 8 is locked into the housing 13, the half-matrix 6 is opened and the finished pipe is removed from the mandrel. In the manufacture of multilayer thin-walled pipes on the mandrel, the next pipe billet is installed in series with an outer diameter smaller than the internal diameter of the finished pipe, the roTOBjTo pipe in the same sequence distributes the second pipe to eliminate the gap between the pipes. These operations are repeated until the required number of layers of a multi-walled tube is obtained. The proposed design of the device for distributing tooshed pipes allows to carry out the pipe dispensing process qualitatively and increases the reliability of the device, since it lacks mechanical elements that directly interact with the elastic chamber and cause its premature wear. Claim 1. A device for dispensing pipes containing a mandrel mounted in a housing with an elastic tube wound on it, one end of which is plugged and the other connected to a hydraulic system, characterized in that it is fitted with a rigidly fixed in the housing its axis is a bar, and the mandrel is driven by its axial movement, with the mandrel mounted on the rod.

2. The device according to claim 1, wherein. that the drive of the movement of the mandrel is executed in the form. A piston rigidly connected to the mandrel is located in a cylinder mounted in a housing. Sources of information accepted during the examination at examination 1. USSR author's certificate in application No. 2925805 / 25-27, cl. B 21 D 39/06, 27.02.80 (prototype).