FR2536680A1 - T-piece pipe fitting mfr system - Google Patents

T-piece pipe fitting mfr system Download PDF

Info

Publication number
FR2536680A1
FR2536680A1 FR8219757A FR8219757A FR2536680A1 FR 2536680 A1 FR2536680 A1 FR 2536680A1 FR 8219757 A FR8219757 A FR 8219757A FR 8219757 A FR8219757 A FR 8219757A FR 2536680 A1 FR2536680 A1 FR 2536680A1
Authority
FR
France
Prior art keywords
blank
pushers
tube
tubular
tubular blank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8219757A
Other languages
French (fr)
Other versions
FR2536680B1 (en
Inventor
Raymond Sotteau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Priority to FR8219757A priority Critical patent/FR2536680B1/en
Priority to DE19833342091 priority patent/DE3342091A1/en
Publication of FR2536680A1 publication Critical patent/FR2536680A1/en
Application granted granted Critical
Publication of FR2536680B1 publication Critical patent/FR2536680B1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/043—Means for controlling the axial pusher
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture 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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • B21C37/29—Making branched pieces, e.g. T-pieces
    • B21C37/294—Forming collars by compressing a fluid or a yieldable or resilient mass in the tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Forging (AREA)

Abstract

The T-piece pipe fitting for making a branch pipe connection is made from a short length of the tube (1) with oblique end faces. The tube is placed in a die (11) consisting of a block with a through bore and a hole (15) at right angles to the bore. The tube is subjected to internal hydraulic pressure by means of two rams (12) (13) with shoulders (12a,13a). The shoulders press initially on the end face of the tube wall on that side of the tube on which the branch is to be formed causing the wall (1a) to buckle outwards into the hole (15).

Description

L'invention se rapporte a un raccord tubulaire en forme de Té et plus précisément a son procédé de fabrication à partir d'une ébauche tubulaire. The invention relates to a T-shaped tubular connection and more precisely to its method of manufacture from a tubular blank.

On contact des procédés de fabrication qui sont basés sur l'utilisation d'un lingot de charge de remplissage plastique, solide a la température ambiante, tout en étant capable d'un écoulement plastique sous l'effet d'une pression.We contact manufacturing processes which are based on the use of a plastic filling charge ingot, solid at room temperature, while being capable of plastic flow under the effect of pressure.

L'ébauche tubulaire a mettre sous la forme d'un raccord en
Té est remplie du lingot de matière de remplissage, soit en introduisant le lingot a l'état solide dans l'ébauche, soit en coulant le lingot de charge directement dans ladite ébauche. L'ébauche tubulaire est ensuite placée dans une matrice de formage, puis une pression est appliquée en meme temps au lingot et à l'ébauche pour mettre ladite ébauche sous la forme d'un raccord en forme de Té, la charge de remplissage étant ensuite séparée par fusion et réutilisée.The tubular blank to be put in the form of a fitting in
The tee is filled with the ingot of filling material, either by introducing the ingot in the solid state into the blank, or by pouring the charge ingot directly into said blank. The tubular blank is then placed in a forming die, then a pressure is applied at the same time to the ingot and to the blank to put said blank in the form of a T-shaped connection, the filling load then being separated by fusion and reused.

Mais ce genre de technique connue de fabrication d'un raccord en forme de Té présente des inconvénients. En effet, les ébauches tubulaires sont généralement découpées a la longueur désirée par tronçonnage d'un tube, si bien que les extrémités de ces ébauches sont droites et perpendiculaires à l'axe central. De plus au moment de la mise en forme du raccord, une pression est exercée, par deux poussoirs opposés également de sections droites, simultanément de chaque côté sur le lingot de charge et sur l'ensemble du pourtour de chacune des extrémités de l'ebauche. Pendant l'opération de formage le métal de l'ébauche est donc soumis à deux contraintes :une compression axiale régulière de ses fibres et une expansion radiale non régulière au droit de la ramification latérale .Il en résulte une modification de l'épaisseur de métal de l'ébauche :c'est- -dire un amincissement de la partie filée dans la ramification latérale, et un épaississement dans la partie centrale opposée a la ramification latérale. La robustesse du raccord étant liée a l'epais- seur minimale de la paroi en un point quelconque, toute aug mentation d'épaisseur au-delà du minima requis, représente donc un gaspillage économique
La présente invention a donc pour objet un procédé de fabication qui permet d'obtenir un raccord à épaisseur de paroi regu- lière. However, this type of known technique for manufacturing a T-shaped connector has drawbacks. In fact, the tubular blanks are generally cut to the desired length by cutting off a tube, so that the ends of these blanks are straight and perpendicular to the central axis. In addition, when the fitting is shaped, pressure is exerted by two opposite pushers also of straight sections, simultaneously on each side on the loading ingot and on the entire periphery of each of the ends of the blank. . During the forming operation, the metal of the preform is therefore subjected to two stresses: regular axial compression of its fibers and uneven radial expansion in line with the lateral branching. This results in a modification of the thickness of the metal of the blank: that is to say a thinning of the spun part in the lateral branching, and a thickening in the central part opposite to the lateral branching. The robustness of the connection being linked to the minimum thickness of the wall at any point, any increase in thickness beyond the minimum required therefore represents an economic waste.
The present invention therefore relates to a manufacturing process which makes it possible to obtain a fitting with regular wall thickness.

Suivant l'invention, une pression est exercée par les deux poussoirs opposés de l'ensemble de formage sur les extrémités de l'ébauche, seulement dans la zone où se forme la ramification latérale du raccord en Té.According to the invention, pressure is exerted by the two opposite pushers of the forming assembly on the ends of the blank, only in the area where the lateral branching of the tee fitting is formed.

D'autres caractéristiques particulières et avantages de l'invention appara#tront à la lecture de la description qui va suivre, en référence aux dessins annexés qui représentent
Figures 1 et 2 : deux vues schématiques en coupe d'un en
semble de matrice de formage, montrant la
fabrication d'un raccord en forme de Té
selon un procédé connu.Other particular characteristics and advantages of the invention will appear on reading the description which follows, with reference to the appended drawings which represent
Figures 1 and 2: two schematic sectional views of a
appears of forming matrix, showing the
manufacture of a T-shaped fitting
according to a known method.

Figures 3 et 4 : deux vues schématiques en coupe d'un en
semble de matrice de formage, montrant
deux variantes du procédé de fabrication
selon l'invention.Figures 3 and 4: two schematic sectional views of a
appears from forming die, showing
two variants of the manufacturing process
according to the invention.

On a représenté sur les figures 1 et 2, montrant un procédé connu de fabrication d'un raccord en forme de Té, une ébauche tubulaire 1 dont les extrémités sont droites et qui est obtenue par exemple par tronçonnage d'un tube.There is shown in Figures 1 and 2, showing a known method of manufacturing a T-shaped connector, a tubular blank 1 whose ends are straight and which is obtained for example by cutting a tube.

Cette ébauche tubulaire 1 contenant un lingot de charge est introduite dans un ensemble de formage 10 comprenant une matrice 11 et deux poussoirs opposés 12 et 13.This tubular blank 1 containing a charge ingot is introduced into a forming assembly 10 comprising a die 11 and two opposite pushers 12 and 13.

La matrice 11 comporte d'une part un évidement tubulaire longitudinal 14 ouvert aux deux extrémités pour permettre l'introduction des poussoirs et d'autre part un évidement de formage 15 s'étendant latéralement et transversalement a l'évidement 14 pour permettre de former la ramification latérale d'un raccord en forme de Té. The matrix 11 comprises on the one hand a longitudinal tubular recess 14 open at the two ends to allow the introduction of the pushers and on the other hand a forming recess 15 extending laterally and transversely to the recess 14 to allow forming the lateral branching of a T-shaped fitting.

Les poussoirs opposés (12 - 13) comportent chacun un épau
lement annulaire droit (12a - 13a) de telle manière que les
extrémités des poussoirs (12 - 13) s'engagent étroitement
à l'intérieur de l'ébauche 1 et que les épaulements (12a
13a) viennent en butée contre les rebords de ladite ébauche.The opposite pushers (12 - 13) each have a shoulder
right annular ring (12a - 13a) in such a way that the
ends of pushers (12 - 13) engage closely
inside the blank 1 and that the shoulders (12a
13a) abut against the edges of said blank.

Pour réaliser le raccord en Té, les deux poussoirs (12 - 13) sont actionnes l'un vers l'autre contre l'ébauche 1 et le
lingot de charge 2 (fig. 2). La pression s'exerçant contre
les extrémités de l'ébauche tubulaire 1 par les épaulements
(12a - 13a) comprime le métal dans le sens longitudinal pour fournir un excédent de matière, tandis que la pression s'exerçant sur le lingot de charge 2 l'oblige a remp-lir tout l'intérieur de l'ébauche et pousse une partie du métal de
l'ébauche transversalement à son axe normal dans l'evidement latéral 15. Cette opération forme la ramification laterale la du raccord en Té, la matière de remplissage exer çant une action d'écoulement visqueuse pour créer cette ramification.To make the tee connection, the two pushers (12 - 13) are actuated towards each other against the blank 1 and the
charge ingot 2 (fig. 2). The pressure against
the ends of the tubular blank 1 by the shoulders
(12a - 13a) compresses the metal in the longitudinal direction to provide an excess of material, while the pressure exerted on the ingot of charge 2 forces it to fill the entire interior of the blank and pushes a part of the metal of
the blank transverse to its normal axis in the lateral recess 15. This operation forms the lateral branching of the T-connector, the filling material exerting a viscous flow action to create this branching.

Mais ce procédé connu présente des inconvénients. En effet, en utilisant des poussoirs munis d'épaulements annulaires droits et des extrémités droites de l'ébauche, on exerce une pression sur toutes les fibres du métal de l'ébauche tubulaire ce qui provoque, d'un côté, au niveau A de la ramification latérale la, l'allongement souhaitable des fibres, mais du côté opposé B a cette ramification,une compression des fibres entrainant un épaississement de la paroi.However, this known method has drawbacks. In fact, by using pushers fitted with straight annular shoulders and straight ends of the blank, pressure is exerted on all the fibers of the metal of the tubular blank, which causes, on one side, at level A of the lateral branching la, the desirable elongation of the fibers, but on the opposite side B to this branching, compression of the fibers resulting in thickening of the wall.

Suivant l'invention, pour éviter cet inconvénient , une pression est exercée sur l'ébauche tubulaire par les deux poussoirs- opposés seulement dans la zone où se forme la ramification latérale du raccord en Té.According to the invention, to avoid this drawback, pressure is exerted on the tubular blank by the two opposite pushers only in the zone where the lateral branching of the Tee connector is formed.

Dans un premier procédé de fabrication (fig. 3) conforme a l'invention, on obtient ce résultat, en utilisant - une ébauche tubulaire 1 dont les extrémités s-ont biseautées, - et des poussoirs opposés (12 - 13) classiques comportant chacun un épaulement (12a - 13a) droit, la plus grande gé nératrice de l'ébauche 1 étant évidemment positionnée dans la matrice 11 du côté du passage de formage 15.In a first manufacturing process (FIG. 3) in accordance with the invention, this result is obtained by using - a tubular blank 1 whose ends are bevelled, - and conventional opposite pushers (12 - 13) each comprising a right shoulder (12a - 13a), the largest generator of the blank 1 being obviously positioned in the die 11 on the side of the forming passage 15.

Dans un second procédé de fabrication (fig. 4), on utilise cette fois une ébauche tubulaire 1 dont les extrémités sont droites et des poussoirs opposés (22 - 23) comportant chacun un épaulement annulaire (22a -- 23a) taillé en biseau, plus ou moins gauche, la partie la plus avancée des épaulements (22a - 23a) agissant sur l'ébauche tubulaire 1 du côté où se forme la ramìfication latérale la.In a second manufacturing process (fig. 4), this time a tubular blank 1 is used whose ends are straight and opposite pushers (22 - 23) each comprising an annular shoulder (22a - 23a) bevelled, more or less left, the most advanced part of the shoulders (22a - 23a) acting on the tubular blank 1 on the side where the lateral branching la is formed.

Pour réaliser le raccord en Té, dans les deux cas, les poussoirs (12-13 ou 22-23) sont également actionnés l'un vers l'autre contre l'ébauche 1 et le lingot de charge 2. La pression s'exerçant contre les extrémités de l'ébauche tubulaire 1 par les épaulements (12a-13a ou 22a-23a) comprime le métal dans le sens longitudinal seulement dans la zone où doit se former la ramification latérale la tandis- que la pression s'exerçant sur le lingot de charge 2 pousse une partie du métal dans l'évidement latéral 15. To make the tee connection, in both cases, the pushers (12-13 or 22-23) are also actuated towards each other against the blank 1 and the load ingot 2. The pressure exerted against the ends of the tubular blank 1 by the shoulders (12a-13a or 22a-23a) compresses the metal in the longitudinal direction only in the zone where the lateral branching is to be formed while the pressure exerted on the loading ingot 2 pushes part of the metal into the lateral recess 15.

De cette manière, on obtient un allongement équivalent des fibres et une épaisseur uniforme de métal dans l'ensemble du raccord, réduisant ainsi le poids du métal du raccord au strict nécessaire pour. sa robustesse. In this way, an equivalent elongation of the fibers and a uniform thickness of metal are obtained throughout the fitting, thus reducing the weight of the metal of the fitting to what is strictly necessary. its robustness.

Claims (3)

Revendications. du raccord en Te. dans la zone où se forme la ramification latérale (la) sur les extrémités de l'ébauche tubulaire (1) seulement exercée par les deux poussoirs opposés (12-13 ou 22-23) l'ébauche caractérisé par le fait que la pression est annulaire exerçant une pression sur les extrémités de deux poussoirs opposés munis chacun d'un épaulement dans un ensemble de formage comprenant une matrice et adéquate, ladite ébauche tubulaire étant positionnée charge, ou soumise à u-ne pression hydraulique interne partir d'une ébauche tubulaire contenant un lingot deClaims. of the fitting in Te. in the area where the lateral branching (la) is formed on the ends of the tubular blank (1) only exerted by the two opposite pushers (12-13 or 22-23) the blank characterized in that the pressure is annular exerting pressure on the ends of two opposite pushers each provided with a shoulder in a forming assembly comprising a matrix and suitable, said tubular blank being positioned loaded, or subjected to an internal hydraulic pressure from a tubular blank containing an ingot of 1 / Procédé de fabrication d'un raccord en forme de Te à 1 / Method of manufacturing a Te-shaped fitting to 13a) de chacun des poussoirs (12 - 13) sont droits. 13a) of each of the pushers (12 - 13) are straight. biseautées tandis que les épaulements annulaires (12a  bevelled while the annular shoulders (12a fait que les extrémités de l'ébauche tubulaire (1) sont causes the ends of the tubular blank (1) to be 2 / Procédé selon la revendication 1 caractérisé par le 2 / A method according to claim 1 characterized by the bauche tubulaire sont droites.  tubular bauche are straight. plus ou moins gauche tandis que les extrémités de l'é-  more or less left while the ends of the é- chacun des poussoirs (22 - 23) sont taillés en biseau each of the pushers (22 - 23) are cut in a bevel fait que les épaulements annulaires (22a - 23a) de causes the annular shoulders (22a - 23a) of 3 / Procédé selon la revendication 1 caractérisé par le 3 / A method according to claim 1 characterized by the
FR8219757A 1982-11-25 1982-11-25 METHOD FOR MANUFACTURING A TEE TUBULAR CONNECTION Expired FR2536680B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR8219757A FR2536680B1 (en) 1982-11-25 1982-11-25 METHOD FOR MANUFACTURING A TEE TUBULAR CONNECTION
DE19833342091 DE3342091A1 (en) 1982-11-25 1983-11-22 Process for the production of a T-shaped pipe branch piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8219757A FR2536680B1 (en) 1982-11-25 1982-11-25 METHOD FOR MANUFACTURING A TEE TUBULAR CONNECTION

Publications (2)

Publication Number Publication Date
FR2536680A1 true FR2536680A1 (en) 1984-06-01
FR2536680B1 FR2536680B1 (en) 1986-11-28

Family

ID=9279511

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8219757A Expired FR2536680B1 (en) 1982-11-25 1982-11-25 METHOD FOR MANUFACTURING A TEE TUBULAR CONNECTION

Country Status (2)

Country Link
DE (1) DE3342091A1 (en)
FR (1) FR2536680B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052659A1 (en) * 1998-04-11 1999-10-21 Wilhelm Schulz Gmbh Housing for pipe valves and fittings and method for producing the same

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2492952C1 (en) * 2012-06-18 2013-09-20 Открытое акционерное общество "ТРУБОДЕТАЛЬ" Method of making tees (versions)
CN102756011B (en) * 2012-07-10 2015-02-18 清华大学 Manufacture method of irregular pipe
CN102773306B (en) * 2012-08-09 2017-07-18 赵肖运 Extruded tube leads to the manufacture craft of the logical part of filled media and its extruded tube of part
CN102962309A (en) * 2012-11-27 2013-03-13 江苏麦涛机电设备有限公司 Forming method and device for thin-wall T-pipe
CN103252380B (en) * 2013-05-28 2015-05-06 宁波新世达精密机械有限公司 Non-thinning upsetting-bulging forming method and device for shaped tube with variable cross section
CN103331329B (en) * 2013-07-17 2016-12-28 佛山市顺德区科鸿电器有限公司 Tee T moulding powder medium and moulding process thereof
RU2559623C1 (en) * 2014-02-20 2015-08-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Самарский государственный аэрокосмический университет имени академика С.П. Королева (национальный исследовательский университет)" (СГАУ) Forming of thin-wall tee-bands
CN105215252A (en) * 2015-10-23 2016-01-06 北京机电研究所 The forming technology of the mould of preform 45 ° of skew T jumping-up parts, method and 45 ° of skew Ts
CN105252230B (en) * 2015-12-01 2017-05-24 河北宏润核装备科技股份有限公司 Machining process for inclined tee
CN105562496A (en) * 2015-12-09 2016-05-11 英昌精密机械设备（泰州）有限公司 Manufacturing method and device of tee joint pipe fitting
CN105436244B (en) * 2015-12-16 2017-10-13 广东工业大学 A kind of three-way pipe Internal High Pressure Forming on-line detecting system and method
RU2635491C1 (en) * 2016-06-06 2017-11-13 Акционерное общество "Трубодеталь" (АО "Трубодеталь") Method for manufacturing tee-pieces (versions)
CN106270099B (en) * 2016-08-11 2018-01-02 浙江欧特立汽车空调有限公司 A kind of water expansion type air conditioning for automobiles copper tube processing device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR459292A (en) * 1913-06-16 1913-10-31 Clayton Mark Manufacturing process of pipe fittings
GB470485A (en) * 1935-04-02 1937-08-13 Edward Shelton Cornell Jr Method of producing integral metal pipe fittings
US2206741A (en) * 1937-12-06 1940-07-02 Jr Edward S Cornell Mechanico-fluid-pressure method of producing lateral-provided fittings
US3350905A (en) * 1963-12-21 1967-11-07 Agency Ind Science Techn Liquid pressure bulge forming apparatus
EP0036365A1 (en) * 1980-03-13 1981-09-23 VALLOUREC Société Anonyme dite. Process for manufacturing workpieces by hydraulic-pressure shaping, and apparatus for carrying out this process
FR2535987A1 (en) * 1982-11-16 1984-05-18 Vallourec Method of forming one or more bulbs by the plastic deformation during expansion of the wall of a section of pipe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR459292A (en) * 1913-06-16 1913-10-31 Clayton Mark Manufacturing process of pipe fittings
GB470485A (en) * 1935-04-02 1937-08-13 Edward Shelton Cornell Jr Method of producing integral metal pipe fittings
US2206741A (en) * 1937-12-06 1940-07-02 Jr Edward S Cornell Mechanico-fluid-pressure method of producing lateral-provided fittings
US3350905A (en) * 1963-12-21 1967-11-07 Agency Ind Science Techn Liquid pressure bulge forming apparatus
EP0036365A1 (en) * 1980-03-13 1981-09-23 VALLOUREC Société Anonyme dite. Process for manufacturing workpieces by hydraulic-pressure shaping, and apparatus for carrying out this process
FR2535987A1 (en) * 1982-11-16 1984-05-18 Vallourec Method of forming one or more bulbs by the plastic deformation during expansion of the wall of a section of pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052659A1 (en) * 1998-04-11 1999-10-21 Wilhelm Schulz Gmbh Housing for pipe valves and fittings and method for producing the same

Also Published As

Publication number Publication date
FR2536680B1 (en) 1986-11-28
DE3342091A1 (en) 1984-05-30

Similar Documents

Publication Publication Date Title
FR2536680A1 (en) T-piece pipe fitting mfr system
US4338716A (en) Plastic pipe provided with a groove
FR2572394A1 (en) METHOD FOR MANUFACTURING A CERAMIC TURBINE RING INTEGRATED WITH AN ANNULAR METAL SUPPORT
WO2019025330A1 (en) Reinforcement anchoring device
EP0048701B1 (en) Method of making pipe unions
WO1984000186A1 (en) Moldable material reinforcement fibers with hydraulic or non-hydraulic binder and manufacturing thereof
EP3268195A1 (en) Method for moulding tubular elements in a material comprising cement, and pile thus produced
CA2987540C (en) Hollow profile member such as a tube made of thermosetting composite materials and corresponding method
FR2756758A1 (en) PROCESS FOR MANUFACTURING A SHAPED METAL BOX AND METAL BOX OF THE BEVERAGE BOX TYPE OBTAINED BY THIS PROCESS
FR2677723A1 (en) Device for elastic connection between two components, method for manufacturing this device, and installation for implementing this method
FR2837132A1 (en) Flexible plastic tube with a head fitted with a neck to give an opening to spread out the tube contents has a wall covering over the neck opening with a circular notch to allow the cover to be ruptured to clear the opening
CH622857A5 (en)
EP0019256B1 (en) Socketed ductile cast iron pipe
FR2548949A1 (en) Prestressed concrete pipe mould
FR2634856A1 (en) Concrete pipe
FR2806779A1 (en) METHOD FOR ASSEMBLING A CONDUIT ON A RIGID TUBULAR END CAP BY MEANS OF A NUT SCREWED ONTO THE END CAP, AND CONNECTION FOR IMPLEMENTING THE METHOD
FR2649340A1 (en) METHOD AND DEVICE FOR CONTINUOUS CASTING BETWEEN CYLINDERS OF THIN METAL PRODUCTS FOR DIRECT COLD ROLLING
FR2474908A1 (en) CLOSED CHAMBER EXTRUSION METHOD AND DEVICE FOR CONFIGURING A METAL ROD IN A TULIP-SHAPED WORKPIECE
EP2428691A1 (en) Blind nut insert with deformable threading tool recess and method for manufacturing and deforming the insert
FR2877259A1 (en) Moulding device for manufacturing envelope of heicoidal bellows comprises a mould and core having complementary threading to delimit moulding space and the envelope and core are unscrewed for stripping of the envelope
FR2533472A1 (en) Method for the leaktight assembly, by expansion of metal, of two metal parts and the parts assembled in accordance with the said method.
CH349569A (en) Process for manufacturing a two-piece tubing and die for implementing this process
FR2733295A1 (en) Method for connecting heat exchanger ducts
FR2476401A1 (en) PROCESS FOR PRODUCING A COMPOSITE CENTRAL ELECTRODE FOR IGNITION CANDLE
FR2703606A1 (en) Method of manufacturing hollow shafts having a profile

Legal Events

Date Code Title Description
CA Change of address
CD Change of name or company name
TP Transmission of property
ST Notification of lapse