SU1268094A3 - Method for manufacturing ribbed pipes from bimetallic round billets and set of tools for manufacturing ribbed pipes - Google Patents

Method for manufacturing ribbed pipes from bimetallic round billets and set of tools for manufacturing ribbed pipes Download PDF

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Publication number
SU1268094A3
SU1268094A3 SU843716506A SU3716506A SU1268094A3 SU 1268094 A3 SU1268094 A3 SU 1268094A3 SU 843716506 A SU843716506 A SU 843716506A SU 3716506 A SU3716506 A SU 3716506A SU 1268094 A3 SU1268094 A3 SU 1268094A3
Authority
SU
USSR - Soviet Union
Prior art keywords
rolling
discs
disc
bending
rib
Prior art date
Application number
SU843716506A
Other languages
Russian (ru)
Inventor
Пшибыла Януш
Гоздевич Зигмунд
Шаль Анджей
Зуб Ришард
Мончински Анджей
Original Assignee
Заклады Ужондзэнь Хэмичных "Мэтальхэм" (Инопредприятие)
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Application filed by Заклады Ужондзэнь Хэмичных "Мэтальхэм" (Инопредприятие) filed Critical Заклады Ужондзэнь Хэмичных "Мэтальхэм" (Инопредприятие)
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Publication of SU1268094A3 publication Critical patent/SU1268094A3/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15Making tubes of special shape; Making tube fittings
    • B21C37/20Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/207Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Forging (AREA)

Abstract

A method of rolling transverse ribbed tubes consists in that the rib (11) after forming is deflected in the direction of rolling parabolically, the external tube (4) is pressed down to the core tube (5), and deflecting the rib (11) and pressing down the external tube (4) to the core tube (5) is carried out during one revolution of the tube, and afterwards the rib is straightened. A set of tools for rolling transverse ribbed tubes has three tools provided with roll-formed disks (6, 7, 8, 9), supporting and straightening, whereby the second - in the direction of rolling - part of the profile of supporting disks is concave, preferably parabolically, and the last - in the direction of rolling - tool is provided with a supporting disk of the outer diameter bigger by from 0.1 to 0.8 mm from the outer diameter of the other supporting disks.

Description

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Claims (2)

Uiib Изобретение относитс  к обработке металлов давлением и может быть использовано при изготовлении поперечной винтовой прокаткой ребристых труб наход пщх применение в теплообменниках . Целью изобретени   вл етс  получение ребристых труб с мальнум толщи нами ребер без межтрубной щели. На фиг, 1 изображен; набор инструмента , сечение плоскостью, перпен дикул рной оси прокаткиJ на фиг. 2один из двух первьк (по направлении прокатки) валковр осевое сечение; на фиг. 3 - последний (по направлению прокатки) BSunoKj,, осевое сечение pa фиг 4 конструкци  выгибающего диска. Валки 1J, 2 и 3 расположены вокру наружной трубы под углом 120 друг относительно друга. Внутри наружной трубы 4 находитс  внутренн   труба 5 Валки набраны из известных прокатны дисков 6р составл ющих секции надpe3KH ,Tpy6Hj секции выт жки ребра секции формировани  ребраj выгибающих дисков 7 и 8 и правильных дисков 9 Передн   торцова  поверхност выгибающих дисков 7 и 8 (по направлению прокатки) вьшолнена по форме последнего прокатного диска, а задн   их поверхность выполнена по закону параболы. Парабола соответствует следующей зависимости: у Ах +Вх+С, где X осевое рассто ние точек про фил  диска от его основани  10° С - радиус основани  10 подпирающего дискаj у - радиальное рассто ние точек профил  подпирающего ролика А GS В i 0. Подбор значений параметров А и В зависит от требуемой геометрии и ди аметра наружной трубы 4. Нару;кка  труба 4 вместе с внутренней трубой 5, пройд  зону Бездействи  прокатны . дисков 6j перемещаетс  поступательно-вращательным движением (по спира ли) в зону воздействи  выгибающгх дисков 7 и 8. Выгибающие диски 7 вхо д т в состав первых (по направлению прокатки) валков 1 и 2. Их задачей  вл етс  изгибание по параболическо му закону ребра 11. Выгибающий диск 8, расположенный на третьем (послед 4г нем) валке 3 имеет наружный диаметр на 0,1 до 0,8 мм больше наружного диаметра первых выгибающих дисков 7. Увеличение наружног-о диаметра дисков 8 вызывает прижим наружной трубы 4 к внутренней трубе 5. На последней стадии прокатки происходит правка ребра 11J что осуществл етс  при помощи прав щего диска 9. Формула изобретени  1 Способ изготов,1ени  ребристых труб из биметаллических трубных заготовокJ состо щих из наружной и внутренней труб,, при котором валками в виде дисков пс-следовательно осуществл ют предварительную нарезку ребраJ его выт жку формообразование после чего ребро отгибают от поперечного положени , снимают усилие деформацииJ а затем вновь к ребру прикладывают усилие деформахщи отгибают ребро в сторону, противоположную направлению первоначального гиба, после чего ребро прав т до поперечного положени , отличающийс  тем, что5 с целью получени  ребристых труб с малыми толщинами ребер без межтрубной щели, отгибку ребра от поперечного положени  осуществл ют пс параболическому закону, причем на последней стадии гибки наружную трубу в межреберном пространстве подвергают дополнительному радиальном обжатию в течение одного оборота трубы, Uiib The invention relates to the processing of metals by pressure and can be used in the manufacture of cross-helical rolling of finned tubes, which are used in heat exchangers. The aim of the invention is to obtain finned tubes with a minimum thickness of the ribs without a tubular gap. Fig, 1 is depicted; tool set, plane cross-section, perpendicular to the rolling axis J in FIG. 2One of the first two (in the rolling direction) rollovr axial section; in fig. 3 - the last (in the direction of rolling) BSunoKj ,, axial section pa figure 4 of the arch structure. The rolls 1J, 2 and 3 are located around the outer tube at an angle of 120 relative to each other. Inside the outer tube 4 there is an inner tube 5 The rolls are made up of well-known rolling discs 6p, constituting sections above pepe3KH, Tpy6Hj, extrusion sections of the rib section of forming ribs j of bending discs 7 and 8 and correct discs 9 It is made in the shape of the last rolling disc, and their rear surface is made according to the law of a parabola. Parabola corresponds to the following relationship: Ax + Bx + C, where X is the axial distance of points about the disk fillet from its base 10 ° C - base radius 10 of the supporting disk j y - radial distance of the points of the support roller profile A GS B i 0. Selection of values parameters A and B depend on the required geometry and diameter of the outer pipe 4. Naru; kka pipe 4, together with the inner pipe 5, passes through the Inactivity zone rolled. The disks 6j move in a translation-rotational movement (in a spiral) into the zone of impact of the bending disks 7 and 8. The bending disks 7 are included in the first (in the direction of rolling) rolls 1 and 2. Their task is to bend according to the parabolic edge 11. The bending disc 8 located on the third (the last 4 g of it) roll 3 has an outer diameter of 0.1 to 0.8 mm greater than the outer diameter of the first bending disc 7. An increase in the outer diameter of the disc 8 causes the outer pipe 4 to be pressed to the inner pipe 5. At the last stage of rolling, Edge 11J is straightened by means of a backing disc 9. Claim 1: A method of manufacturing 1 ribbed tubes from bimetallic billets consisting of outer and inner tubes, in which the ribs in the form of discs PS-hence pre-cut the ribs its stretching is formed, after which the rib is bent away from the transverse position, the deformation force is removed, and then the force is again applied to the edge; the force is bent in the direction opposite to the direction of the original g ba, after which the rib is right to the lateral position, characterized in that 5 in order to obtain finned tubes with small thicknesses of ribs without an annular gap, the rib is bent from the transverse position by a parabolic law; additional radial compression during one revolution of the pipe, 2. Набор инструмента дл  кзготовлени  ребристых содержащий три валка} каждьп1 из которых состоит из последовательно установленных прокатиых дисков 5 выгибаКЩих дисков и правильных дисков, отличающийс   тем, что торп.ова  поверхность выгибающего диска, обращенна  к прокатным дискам, вьшолнена по форме последнего прокатного диска, наружный диаметр последнего в наборе выгибающего диска выполнен на 0,,1 OjB мм больше наружного диаметра предыдущих выгибаю1П их дисков предьизщих валков, а профиль задней торцовой поверхности выгибающих дисков имеет форму отрезка параболы5 уравнение КОТОРОЙ у Ах +Вх+С,2. A set of tools for making ribbed ones containing three rolls} each of which consists of successively installed rolled discs 5 bending discs and regular discs, characterized in that the torpovy surface of the arching disc facing the rolling discs is made according to the shape of the last rolling disc, The outer diameter of the latter in the set of the bending disc is 0, 1 OjB mm larger than the outer diameter of the previous 1P bending of their disks of the preceding rolls, and the profile of the back end surface of the arching discs c has the shape of a parabola segment5 the equation KOTORAH at Ax + Bx + C, где X - ось инструмента, лежаща  вwhere X is the axis of the tool lying in плоскости основани  выгибающего диска, наход щегос  в диапазоне значений х 0-6 мм.the plane of the base of the arching disc, which is in the range of x 0-6 mm. А О, В О,A Oh, B Oh, С - величина радиуса основани  выгибающего диска.C is the radius of the base of the arching disk. If лIf l 5 фи€.35 fi € .3 Фиг. FIG.
SU843716506A 1983-03-31 1984-03-29 Method for manufacturing ribbed pipes from bimetallic round billets and set of tools for manufacturing ribbed pipes SU1268094A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL24132483A PL139849B1 (en) 1983-03-31 1983-03-31 Method of rolling of transversally finned pipes and set of tools therefor

Publications (1)

Publication Number Publication Date
SU1268094A3 true SU1268094A3 (en) 1986-10-30

Family

ID=20016489

Family Applications (1)

Application Number Title Priority Date Filing Date
SU843716506A SU1268094A3 (en) 1983-03-31 1984-03-29 Method for manufacturing ribbed pipes from bimetallic round billets and set of tools for manufacturing ribbed pipes

Country Status (7)

Country Link
EP (1) EP0121252B1 (en)
CS (1) CS247078B2 (en)
DE (1) DE3478581D1 (en)
HU (1) HU197237B (en)
PL (1) PL139849B1 (en)
RO (1) RO89288A (en)
SU (1) SU1268094A3 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1084142A (en) * 1900-01-01
US3683656A (en) * 1970-03-25 1972-08-15 Carl M Lewis Heat exchanger apparatus and method of making the same
PL79817B1 (en) * 1973-11-22 1975-08-30
ZA764761B (en) * 1976-08-09 1978-01-25 Heat Exchangers Africa Ltd Finned tubing
PL113419B1 (en) * 1977-01-26 1980-12-31 Zaklad Doswiadczalny Przy Zakl Method of rolling transversely finned pipes and workingtool therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Патент СССР № 1080734, кл. В 21 С 37/20, 1978. *

Also Published As

Publication number Publication date
RO89288A (en) 1986-03-15
EP0121252A2 (en) 1984-10-10
CS247078B2 (en) 1986-11-13
EP0121252A3 (en) 1987-05-27
HU197237B (en) 1989-03-28
PL241324A1 (en) 1984-10-08
HUT38065A (en) 1986-04-28
PL139849B1 (en) 1987-02-28
EP0121252B1 (en) 1989-06-07
DE3478581D1 (en) 1989-07-13

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