CA2699249A1 - Process for producing copper-brazed double wall steel tubes by means of long cooling line annealing method - Google Patents
Process for producing copper-brazed double wall steel tubes by means of long cooling line annealing method Download PDFInfo
- Publication number
- CA2699249A1 CA2699249A1 CA2699249A CA2699249A CA2699249A1 CA 2699249 A1 CA2699249 A1 CA 2699249A1 CA 2699249 A CA2699249 A CA 2699249A CA 2699249 A CA2699249 A CA 2699249A CA 2699249 A1 CA2699249 A1 CA 2699249A1
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- Prior art keywords
- tube
- copper
- line
- layer
- band
- 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.)
- Abandoned
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000000137 annealing Methods 0.000 title claims abstract description 32
- 238000001816 cooling Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052802 copper Inorganic materials 0.000 claims abstract description 36
- 239000010949 copper Substances 0.000 claims abstract description 36
- 238000005219 brazing Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 6
- 238000007493 shaping process Methods 0.000 claims description 10
- 230000010355 oscillation Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241000518994 Conta Species 0.000 description 1
- 240000004770 Eucalyptus longicornis Species 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- -1 des ion Chemical class 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/09—Making tubes with welded or soldered seams of coated strip material ; Making multi-wall tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention is the production process for the metal tube (1) with at least two walls, wherein the copper is coated onto the steel sheet layer (1.1) by means of the electrolysis method, two wall tube (1) is obtained from the obtained sheet layer (1.1) with copper layer (1.2), the obtained two wall tube (1) is permitted to reach the brazing temperature, then it is heated at the brazing temperature and is joined by means of copper braze heated up to the occurrence of the optimum brazing, said invention being related to cooling the tube (1) by providing its contact with air along the elongation line (A) and the annealing line (T) by means of the annealing line (T) being integrated with the elongation line (A).
Description
PROCESS FOR PRODUCING COPPER-BRAZED DOUBLE WALL ST EL TUBES BY
MEANS OF LONG COOLING LINE ANNEALING METH Q
TECHNICAL FIELD
The invention relates to the production method for metal tube having t least two watis brought together by means of copper-brazing method.
The production process developed according to the present invention c rises the process steps of air-cooling the tube by means of the annealing line integri-ted ith the elongation line, covering Iha tunnel forming the annealing line with serpentine auch at said anneaiing line wiii not be too Ionp, end in the tube shaping group, Increasing th diameters of the spools and the bearing that enable to shape the tubes so that the oacillatio of the band layer is reduced during when the pipe is taking a shape and smoother sect nal surfaces are obtained.
PRIOR ART
The stainiess ateet matertai used in today's industry are preferred to a very wide extent, because of their high corrosion and oxidation resistance, high mecha ical and physicai properties, hot and cold workabiiity and weldability. In order to avoid c rrosion, the steel sheeta are used after increasing the corrosion resistance of their surface The steel sheets made of steel material are generally used in the production of steel tubes.
Steel sheet tubes have a very wide field of use, especiaiiy as the brake and fuel tube in the utomotive sector and also as the condenser tube in the refriBerator,.washing machine and ishwasher, hence the resistance to corrosion must be provided for the surfaces thereof In ntact with water and moisture.
The chemical decomposition an eiectrolyte undergoes under the effect of n electric current is cilled electrolysis. Eiectrolysis develope along with the conduction of aid current within the electrolyte. Electrolyte is frequently in dissolved form or In the fo of an aqueous solution of a sait. Both surfaces of said steel sheet Is coated with co er to be used in brazing process, by means of electrolysis method_ The copper-coated st el sheet is cut in the form of bands having the widths theoretically caiculat d beforehand to the production of the tube with desired diameter, and the bands are wound in the form of olis.
The copper-CoBted sheet bands cut and wound into the bands with appropriate width e passed through shaping spoois placed one after the other and are allowed to take the t be shape in cold process by means of the mandrel.
AMENDED SHEET
PCT/TR 2008/000 103 - 10-07-200~
MEANS OF LONG COOLING LINE ANNEALING METH Q
TECHNICAL FIELD
The invention relates to the production method for metal tube having t least two watis brought together by means of copper-brazing method.
The production process developed according to the present invention c rises the process steps of air-cooling the tube by means of the annealing line integri-ted ith the elongation line, covering Iha tunnel forming the annealing line with serpentine auch at said anneaiing line wiii not be too Ionp, end in the tube shaping group, Increasing th diameters of the spools and the bearing that enable to shape the tubes so that the oacillatio of the band layer is reduced during when the pipe is taking a shape and smoother sect nal surfaces are obtained.
PRIOR ART
The stainiess ateet matertai used in today's industry are preferred to a very wide extent, because of their high corrosion and oxidation resistance, high mecha ical and physicai properties, hot and cold workabiiity and weldability. In order to avoid c rrosion, the steel sheeta are used after increasing the corrosion resistance of their surface The steel sheets made of steel material are generally used in the production of steel tubes.
Steel sheet tubes have a very wide field of use, especiaiiy as the brake and fuel tube in the utomotive sector and also as the condenser tube in the refriBerator,.washing machine and ishwasher, hence the resistance to corrosion must be provided for the surfaces thereof In ntact with water and moisture.
The chemical decomposition an eiectrolyte undergoes under the effect of n electric current is cilled electrolysis. Eiectrolysis develope along with the conduction of aid current within the electrolyte. Electrolyte is frequently in dissolved form or In the fo of an aqueous solution of a sait. Both surfaces of said steel sheet Is coated with co er to be used in brazing process, by means of electrolysis method_ The copper-coated st el sheet is cut in the form of bands having the widths theoretically caiculat d beforehand to the production of the tube with desired diameter, and the bands are wound in the form of olis.
The copper-CoBted sheet bands cut and wound into the bands with appropriate width e passed through shaping spoois placed one after the other and are allowed to take the t be shape in cold process by means of the mandrel.
AMENDED SHEET
PCT/TR 2008/000 103 - 10-07-200~
The produced copper-coated double wait tubes are corlductivety hosted u to a temperature (-1150 C) above the melting temperature of copper, end brazed to ach other under protective gas (hydrogen) at a certain advancing speed in the h ating u it. In the heating unit, the copper, La, the brazing materlai, is prevented from cooling do , as well as from being oxidized under the gas atmosphere. One of the brazing procee takes place via movable contact units, while the other takes place with stationary eontQct u its.
According to the atate of the art, onoe the brazing has taken place, the per-coated steel sheet In the form of a tub anters the annealing unit and the pipe is watere at the end of the line to provide cooling. The hot copper-coated steel tube enters a fast egime of cooling under the influence of water, at the end of the annealing unit.
According to the' state of the art, the costs Increase and the quality re uess due to the reosong mentioned above.
Today, the practic~s related to brazing the steel sheets are known to ist. One of such practices disdosed in the document no. JP7266886 relates to eiectro-p vanization of the steel layer by means of point weidabiiity. This document relates to st pi s et with Increased weidability able to be uaed in the industry with high efFlci ncy.
Another practice in the document no. TR 2006 02246U relates to the nits wherein the brazing provided according to automation by converting the steel sheet ra material from the band form into the cylindrical form, According to this practice, the inven on relates to the units wherein the brazing Is carried out according to automation by conv ing the stainkss steel sheet raw material from band form into cylindrical tubes. The model d signed as Unit 1, Unit 2 and Unit 3 comprises band raw material iniet (1), castemide ru er (2), rope (3), castamido (4), welding torch (5), diamond tip (6) and pipe outtet (1). he units may be adjusted rightwards, ieftwards, upwards and downward and their dep e may also be adjusted. Castamide (4) is used in Unit 1, Unit 2 and Unit 3. The rope (3 providing form to the materiai used enables the smooth flow of material. In Unft 3, the rounded metallic diamond tip (6) is used made of castamide having a corrosion time of 6 m ths.
The support is provided by means of this diamond tip (6) to enable the fom,ed m teri 1 to flow towards the weld In a continuous and uniform manner.
The patent publication no. US2p03012909 relates to the double wall I es comprising a polyamide-based layer at the inside thereof and an outer iayer formed of materiai selected from potyether eater, polyester ether and fluorinated polymer.
AMENDED SHEET
-=-----__ _....._~.._.
According to the atate of the art, onoe the brazing has taken place, the per-coated steel sheet In the form of a tub anters the annealing unit and the pipe is watere at the end of the line to provide cooling. The hot copper-coated steel tube enters a fast egime of cooling under the influence of water, at the end of the annealing unit.
According to the' state of the art, the costs Increase and the quality re uess due to the reosong mentioned above.
Today, the practic~s related to brazing the steel sheets are known to ist. One of such practices disdosed in the document no. JP7266886 relates to eiectro-p vanization of the steel layer by means of point weidabiiity. This document relates to st pi s et with Increased weidability able to be uaed in the industry with high efFlci ncy.
Another practice in the document no. TR 2006 02246U relates to the nits wherein the brazing provided according to automation by converting the steel sheet ra material from the band form into the cylindrical form, According to this practice, the inven on relates to the units wherein the brazing Is carried out according to automation by conv ing the stainkss steel sheet raw material from band form into cylindrical tubes. The model d signed as Unit 1, Unit 2 and Unit 3 comprises band raw material iniet (1), castemide ru er (2), rope (3), castamido (4), welding torch (5), diamond tip (6) and pipe outtet (1). he units may be adjusted rightwards, ieftwards, upwards and downward and their dep e may also be adjusted. Castamide (4) is used in Unit 1, Unit 2 and Unit 3. The rope (3 providing form to the materiai used enables the smooth flow of material. In Unft 3, the rounded metallic diamond tip (6) is used made of castamide having a corrosion time of 6 m ths.
The support is provided by means of this diamond tip (6) to enable the fom,ed m teri 1 to flow towards the weld In a continuous and uniform manner.
The patent publication no. US2p03012909 relates to the double wall I es comprising a polyamide-based layer at the inside thereof and an outer iayer formed of materiai selected from potyether eater, polyester ether and fluorinated polymer.
AMENDED SHEET
-=-----__ _....._~.._.
The patent publication no. US200304 1912 relates to the tubes used In veying the fluids comprising an inner layer made of steel, an outer layer made of steel surr unding said Inner layer and an end connecting piece made of weldable steel.
However, said double wall tubes are not able to provide the desired st ngth.
In addition, extra labor and time losses occur during the production steps of said tu s, costs increase and water consumption becomes very high.
As a result, the presence of the need for the high atrength double wall tub , which eliminate the disadvantages existing in the state, of the art, and the inadequacy of t existing solutions have made It necessary to provide an improvement In the related art.
OBJECT OF THE INVENTION
The present invention relates to the method for producing the metal tube with at least two walls, which satisfies the aforesaid requirements, eiiminates all the d dvantages and provides some additional advantages.
The object of the invention is to carry out a metal tube production method at enebbs more controlled and slower cooiin9, by cooling at least two wailed tube by mea of air within the line where it passes through, instead of contacting with water the copper.
ated and at least two,welied tube coming out of brazing process, owing to the elongation of e line.
The object of the invention is both to prevent the increase in the hardness alues of the metal tubes owing to cooling by air and to avoid the possible corrosive effects of he water, which Is used for cooling purposes and contacted with said tube, on the surface of t e materiai.
In order for the cooling In the winding machines at the end of the ine to reach the temperature that Is possible to reach by the cooling process with wat r, it is needed to extend the cooling line, In order to avoid an excessive length in the cool g line, the tunnel forming the annealing unit is wrapped by serpentine sheets and in this wa , the surface area in contact with the air Is increased.
Another object of the invention is to decrease the osciliation of the band uring the time the tube is taking shape and thus to make it possible to obtain smoother secti al surfaces.
Another object of the Invention is to incroase the quality of production and he oroduct.
AMENDED SHEET
PCT/TR 2008/000 103 - 10-07-200' Another object of the Invention is to reduce the costs.
Another object of the invention is to carry out the production of the tu with wider outer diametRr. In this way, the product diversity is increacod.
In order to achieve all the afor said advantages that will understood drn the following detailed description, the present invention enables the tube to be cool by provldng its contact with the 0ir by meane of the snnealing line lntegrated wRh t elongation lino, wherein the tunnel forming the annealing line is covered by serpmntina s aets ao that said annealing line wlii not be excessivety long, thus the heat transfer nate may Increased. Also in the tube shaping yroup, the diameters, of the spools and the bearings th allow the tube to take shape are enlarged such that the oscillation of the band layer Is red ced during when the pipe Is taking its shape and smoother sectional surfaces are obtained.
The structurai and characteristic features and all the advantages of the inv ntion will be more clearly understood from the appended drawings and the detailed des ion written with referenee to said figures and therefore, the evaluation must be iiiede taking into consideration these figures and the det lled descrrption.
BRIEF DESCRIPTION OF THE FIOURLS
In order to best understand the embodiment of the present invention along with its additional elements and advanta8es, it must be considered together with the figures he description of which Is provided below, Figure-I Is the representative two-dimensional front sectional view of the d bte waq tube.
Fi9ure-2 Is the representative two-dimensional front view of the snneall unit for the tube with at lesat one copper layer.
Figure-3 is the representative two-dimensional front view of the tube shapi group.
Figure-4 is the representative two-dimensional front view of the horizontal s ool group, Figure-5 Is the representative two-dimensional side view of the annealing If e.
Figure-6 Is the representative two-dimensional front view of the section A- of the annealing line.
REFERENCE NUMBERS
1. Tube 1.1. Steel 8heet Layer .1.2. Copper Layer AMENDED SHEET
S
1.3. Joining Surfaces 2. Band Stand 3. Tube shaping group 3.1. Vertical spool group 3.2. Horizontal spool group 3.3. Vertical spool outiot group 4. Annedling unit 4.1. Furnace Group 4.2. Windiass Group 4.3. i.epkage test device 4.4, Tube Stand 5. Crushing group 6. Tunnel 7. Sheets 8. Band layer 9. Lin Net 1 Q. Spool 11. Bearing T Annealing line A Elongation Nne DETAILED DESCRIPTION OF THE INVENTION
In this detailed description, the present invention relates to the production ethod for at least double waHed steel tube with high corrosion resistance and strength.
Figure-1 provid s the representative two-dimensional front sectional view f the double wall tube (1) and Figure-2 provides the representative two-dimensional front vi of the anneaiing unit=(4) where the tube (1) with at least one copper layer (1.2) is fotmod.
Both surfaces of the steel sheet layer (1.1) Is coated with copper to b used.in brazing process, by means of the electrolysis m thod. The steei sheet layer (1.1) ated with copper layer (1.2) is sliced into the widths calculated beforehand theorotiraAy, fo the production of the tube (1) with desired diameter. After this stage, said steel she.t laye (1.1) with copper layer (1.2) takes the shape of the band layer (8) as shpwn in (Ciqure-3 a d Figure-4. Band layer (8) is a layer inciuding copper coated onto the steel sheet layer (1. .
The steel sheet layer (1.1) with copper layer (1.2) in the form of band iayer (8) is wound in e form of a roll in AMENDED SHEET
, = PCT/TR 2008/000 103 - 10-07-200~
tt'>e .tube shaping group (3). The steel sheet tayer (11) with copper layer 1.2) wound In the form of a roil of band layers (8) with suitable width is passed through t shaping mandrel groups (3.1, 3.2) placed one after the other, in order to cold-shape the sa e in the form of a tube (1) with the help of the mandrel (shaft). The tubes (1) with copper I yet (1.2) seen In Figure-1 are heated in the fumace group (4.1) at the meiting temperat re of the copper (about 11500C), and are joined to each other via their joining surface (1.3) under the protective gas (hydrogen) at a certain advance speed, in the fumace grou (4.1), the copper, the brazing materiai, is prevented from cooling down, while it is aiw pre ented from being oxidized under the gas atmosphere. Contrary to the state of the ert, th diameters of the spools are increased from 38 mm to 49 mm and the bearings (1.1) arQ al o enlarged in the spool groups (3.1, 3.2), which enabie the tube (1) to take a shape and are ted in the tube shaping group (3) called roil forming, thus the oscillation of the band Ia er (8) is reduced during when the tuba is (1) taking its shape and smoother sectional surta are obtained. In this way, ft becomes atso posiiWe to perform the production of the tubes () having an outer disrn ter of 6.35 mm, e.p0 mm, 9.52 mm and 10.00 mm. The tube spinp group (3) comprises at iaast eight vertical spool groups (3.1) and at least fivP horiz tai spool groups (3,2) placed on a steel tray wfth the size 2000x340 mm. At least seven o the vertJcai spool groups (3.1) are driven by means of a gearbox and cardan shafts. The firs group comprises the crushing group (5) carrying out the necessary crushing precess on the edge of the band fayer (8) and the connecting eiement of the mandrel wire calibrating the ins e of the tube (1).
As seen in Figure-3, there is a front guide apparatus, which guides the nd layer (8) and retains the dirt such as stone pieces on the band layer (8). The spools of e crushing group (8) are formed such that they can perform the crushino at the necsasary o fe on both sides of the band layer (8). The band layer (8) Is first folded in the form of a wi "U". As seen in Figure-4, the fold remaining outside Is supported by means of the vertical =poots (10) of the horizontal spool groups (3.2), and the radius profiies ar$ folded by mean of the horizontal spoois (10) in accordance with the given tempietes. The horizontal s ols (10) and the vertical spoois (10) are adjusted such that the folding edge will follow a ine (i.e. they are adjusted such that the edge -emaining on the inside will advance on the same level). The tube (1) then pass s through the vertical spool outlet group (3.3) to ad nce towards the elongation iine (A) and then towards the annealing iine (T).
in Figura-5, the representative two-dimensionai side view of the ann ating iine (T) is provided, and in Figure-8, the reprasentative two-dimensional front view of e section A-A of the annealing iine (T) is provided. Contrary to the existing methods, ins ad of contacting with water at least two walled tube (1) coming out of the brazing process to cool down the same, the annealing unit (4) is extended by means of the annealing unit Integrated with AMENDED SHEET
PCT/TR 2008/000 103 - 10-07-200' eiongation line (A) through which said tube (1) passes, and the conta of the tube (1) Is provided with the air, thus achieving a more controlled and slower cooi g of the tube. In order to provide cooiinq by means of air, the annealing iine (T) Is i eqrated with the elongation line (A) to cool down the tube (1). with at least two waiis d owing to suCh cooling, the increase in the hardness values is prevented, as well as av iding the possibte corrosive effects that the water, which is used for cooling and contacting the tube (1), may cause on the surface rnateriai. In said annealing iin (T), there are presen he tunnel (6) and the serpentine sheeta (7). As seen in Fiqure-5, the tunnel stands on feet (9) in the annealing line (T). In order to avoid an excessively long annealing line (T), he tunnel forming said annealing line (T) Is surrounded by steel sheets (7) and in this man , the surface area of the tube (1) contacting the air Is increased. Then the cooled tubes (1) a e passed through the leakage test device (4.3) to subject the same to the leakage test. Th tubes (1) having been subjected to the leakage test are passed through the windlass pro (4.2) puiling the tube according to the machine speed and through the tubet stand (4.4), d thus are made ] 5 ready for delivery.
As a reauit, in order to incrrosse the qualily and reduce the cost for the production of the copper-brazed tube (1) with at least one layer, the annealing line (T) is i tegrated with the previously existing elongation iine (A) (21.5 meters) so that the total tengt of the elongation line (A) and the anneaiing line (T) is increased to 55 meters, and the coo ng of the copper-coated (1.2) tubes (1) with at least 2 walls is provided by means of air, i tead of water. In eddition, with the eniarpement-of the spool (10) diameters and the bearin s(11) in the tube shaping group (3), the oscillation of the band layer (8) Is reduced during w en the tube (1) is taking Its shape and smoother sectional surfaces are obtained.
The invention is the production process for the metal tube (1) with at least o walls, wherein the copper Is coated onto especially the steel sheet iayer (1.1) by means f the electrolysis method; two waN tube (1) is obtained by stagewise advancing from the ob ined sheet layer (1.1) with copper layer (1.2), the obtained two waii tube (1) Is permitted to each the brazing temperature, then it is heated at the brazing temperature by means of the electric contact points located in a mobile and spaced manner from one another and d imiting a heating zone, and is joined by means of copper braze heated up to the occurren e of the optimum brazing, and wherein seid process comprises the process step of coolin the tube (1) by providing its contact with air for a longer time along the elongation line (A) nd thm annealing iine - (T) by means of the anneaiing line (T) being integrated with the eion tion line (A), the diameters of the spool$ (10) have a vaiue of 49 mm ~ 0.02 and the bearing (11) have a size AMENDED SHEET
In the range 31 mm t 0.02 to 38 mm t 0.02 so that the oscillation of t band tayer (B) is reduced in the tube shaping group (3) and smoother sectional surfaces ar obtairwd.
The invention is the line, which has the band stand (2) carrying the pper-coated steel sheet, the vertir.sl spool group (3.1) and the horizontal spool group (3.2) abiing said band layers (8) to pass through said band stand (2) to take the shape of a tu (1), the furnace group (4,1) enabting the heating up to a temperature above the mefting int of tiw copper and preventing the cooling of the copper and also Its oxidation under th gas atmospher+e, the elongation line (A) enabling the tubes (1) to be transported to the i kage test devioe (4,3), wherein there is provided the annealing unit (4) having at least o e annealing line (1') being Integrated with the elongation line (A) to provide the contact of he copper coated tube with at ieast two walls (1) with the air, and also the vertical spool g ups (3.1) and the horizontal spool groups (3.2) are provided in said annealing unit (4) h ving at least one spool (10) with a size of 48 mm t 0.02 and at least one bearing (11) with size in the range 31 mm 10.02 to 38 mm 10.02, in order to docrease the osciilation of said and layer (8) and to enable smoother sectional surfaces to be obtained, and there are tso provided the tunnel (6) through which the tube (1) passes in the annealing line (T), and t least one shest (7) around said tunnel (6), which onablea to avoid an exeessiveiy long ann aiing line (T) and to increase the surface of the copper-coaled lube with at least one layer contact. with the air, said steel (7) being made of steel sheet.
The protective scope of this application is detemiined in the sectlon of cla s and the scope may by no means be limited to the description above provided only for e mplary purposes.
It Is obvious that a person skilled in the art may provide the Innovation t forward by the invvntion aiso by using the similar embodiments and/or apply this embodi ent to other fields with similar purpose used In the relevant art. Consequently, such o odiments would obviousiy tack the criterion of innovative step, and especially the criterio of exceeding the state of the art.
AMENDED SHEET
However, said double wall tubes are not able to provide the desired st ngth.
In addition, extra labor and time losses occur during the production steps of said tu s, costs increase and water consumption becomes very high.
As a result, the presence of the need for the high atrength double wall tub , which eliminate the disadvantages existing in the state, of the art, and the inadequacy of t existing solutions have made It necessary to provide an improvement In the related art.
OBJECT OF THE INVENTION
The present invention relates to the method for producing the metal tube with at least two walls, which satisfies the aforesaid requirements, eiiminates all the d dvantages and provides some additional advantages.
The object of the invention is to carry out a metal tube production method at enebbs more controlled and slower cooiin9, by cooling at least two wailed tube by mea of air within the line where it passes through, instead of contacting with water the copper.
ated and at least two,welied tube coming out of brazing process, owing to the elongation of e line.
The object of the invention is both to prevent the increase in the hardness alues of the metal tubes owing to cooling by air and to avoid the possible corrosive effects of he water, which Is used for cooling purposes and contacted with said tube, on the surface of t e materiai.
In order for the cooling In the winding machines at the end of the ine to reach the temperature that Is possible to reach by the cooling process with wat r, it is needed to extend the cooling line, In order to avoid an excessive length in the cool g line, the tunnel forming the annealing unit is wrapped by serpentine sheets and in this wa , the surface area in contact with the air Is increased.
Another object of the invention is to decrease the osciliation of the band uring the time the tube is taking shape and thus to make it possible to obtain smoother secti al surfaces.
Another object of the Invention is to incroase the quality of production and he oroduct.
AMENDED SHEET
PCT/TR 2008/000 103 - 10-07-200' Another object of the Invention is to reduce the costs.
Another object of the invention is to carry out the production of the tu with wider outer diametRr. In this way, the product diversity is increacod.
In order to achieve all the afor said advantages that will understood drn the following detailed description, the present invention enables the tube to be cool by provldng its contact with the 0ir by meane of the snnealing line lntegrated wRh t elongation lino, wherein the tunnel forming the annealing line is covered by serpmntina s aets ao that said annealing line wlii not be excessivety long, thus the heat transfer nate may Increased. Also in the tube shaping yroup, the diameters, of the spools and the bearings th allow the tube to take shape are enlarged such that the oscillation of the band layer Is red ced during when the pipe Is taking its shape and smoother sectional surfaces are obtained.
The structurai and characteristic features and all the advantages of the inv ntion will be more clearly understood from the appended drawings and the detailed des ion written with referenee to said figures and therefore, the evaluation must be iiiede taking into consideration these figures and the det lled descrrption.
BRIEF DESCRIPTION OF THE FIOURLS
In order to best understand the embodiment of the present invention along with its additional elements and advanta8es, it must be considered together with the figures he description of which Is provided below, Figure-I Is the representative two-dimensional front sectional view of the d bte waq tube.
Fi9ure-2 Is the representative two-dimensional front view of the snneall unit for the tube with at lesat one copper layer.
Figure-3 is the representative two-dimensional front view of the tube shapi group.
Figure-4 is the representative two-dimensional front view of the horizontal s ool group, Figure-5 Is the representative two-dimensional side view of the annealing If e.
Figure-6 Is the representative two-dimensional front view of the section A- of the annealing line.
REFERENCE NUMBERS
1. Tube 1.1. Steel 8heet Layer .1.2. Copper Layer AMENDED SHEET
S
1.3. Joining Surfaces 2. Band Stand 3. Tube shaping group 3.1. Vertical spool group 3.2. Horizontal spool group 3.3. Vertical spool outiot group 4. Annedling unit 4.1. Furnace Group 4.2. Windiass Group 4.3. i.epkage test device 4.4, Tube Stand 5. Crushing group 6. Tunnel 7. Sheets 8. Band layer 9. Lin Net 1 Q. Spool 11. Bearing T Annealing line A Elongation Nne DETAILED DESCRIPTION OF THE INVENTION
In this detailed description, the present invention relates to the production ethod for at least double waHed steel tube with high corrosion resistance and strength.
Figure-1 provid s the representative two-dimensional front sectional view f the double wall tube (1) and Figure-2 provides the representative two-dimensional front vi of the anneaiing unit=(4) where the tube (1) with at least one copper layer (1.2) is fotmod.
Both surfaces of the steel sheet layer (1.1) Is coated with copper to b used.in brazing process, by means of the electrolysis m thod. The steei sheet layer (1.1) ated with copper layer (1.2) is sliced into the widths calculated beforehand theorotiraAy, fo the production of the tube (1) with desired diameter. After this stage, said steel she.t laye (1.1) with copper layer (1.2) takes the shape of the band layer (8) as shpwn in (Ciqure-3 a d Figure-4. Band layer (8) is a layer inciuding copper coated onto the steel sheet layer (1. .
The steel sheet layer (1.1) with copper layer (1.2) in the form of band iayer (8) is wound in e form of a roll in AMENDED SHEET
, = PCT/TR 2008/000 103 - 10-07-200~
tt'>e .tube shaping group (3). The steel sheet tayer (11) with copper layer 1.2) wound In the form of a roil of band layers (8) with suitable width is passed through t shaping mandrel groups (3.1, 3.2) placed one after the other, in order to cold-shape the sa e in the form of a tube (1) with the help of the mandrel (shaft). The tubes (1) with copper I yet (1.2) seen In Figure-1 are heated in the fumace group (4.1) at the meiting temperat re of the copper (about 11500C), and are joined to each other via their joining surface (1.3) under the protective gas (hydrogen) at a certain advance speed, in the fumace grou (4.1), the copper, the brazing materiai, is prevented from cooling down, while it is aiw pre ented from being oxidized under the gas atmosphere. Contrary to the state of the ert, th diameters of the spools are increased from 38 mm to 49 mm and the bearings (1.1) arQ al o enlarged in the spool groups (3.1, 3.2), which enabie the tube (1) to take a shape and are ted in the tube shaping group (3) called roil forming, thus the oscillation of the band Ia er (8) is reduced during when the tuba is (1) taking its shape and smoother sectional surta are obtained. In this way, ft becomes atso posiiWe to perform the production of the tubes () having an outer disrn ter of 6.35 mm, e.p0 mm, 9.52 mm and 10.00 mm. The tube spinp group (3) comprises at iaast eight vertical spool groups (3.1) and at least fivP horiz tai spool groups (3,2) placed on a steel tray wfth the size 2000x340 mm. At least seven o the vertJcai spool groups (3.1) are driven by means of a gearbox and cardan shafts. The firs group comprises the crushing group (5) carrying out the necessary crushing precess on the edge of the band fayer (8) and the connecting eiement of the mandrel wire calibrating the ins e of the tube (1).
As seen in Figure-3, there is a front guide apparatus, which guides the nd layer (8) and retains the dirt such as stone pieces on the band layer (8). The spools of e crushing group (8) are formed such that they can perform the crushino at the necsasary o fe on both sides of the band layer (8). The band layer (8) Is first folded in the form of a wi "U". As seen in Figure-4, the fold remaining outside Is supported by means of the vertical =poots (10) of the horizontal spool groups (3.2), and the radius profiies ar$ folded by mean of the horizontal spoois (10) in accordance with the given tempietes. The horizontal s ols (10) and the vertical spoois (10) are adjusted such that the folding edge will follow a ine (i.e. they are adjusted such that the edge -emaining on the inside will advance on the same level). The tube (1) then pass s through the vertical spool outlet group (3.3) to ad nce towards the elongation iine (A) and then towards the annealing iine (T).
in Figura-5, the representative two-dimensionai side view of the ann ating iine (T) is provided, and in Figure-8, the reprasentative two-dimensional front view of e section A-A of the annealing iine (T) is provided. Contrary to the existing methods, ins ad of contacting with water at least two walled tube (1) coming out of the brazing process to cool down the same, the annealing unit (4) is extended by means of the annealing unit Integrated with AMENDED SHEET
PCT/TR 2008/000 103 - 10-07-200' eiongation line (A) through which said tube (1) passes, and the conta of the tube (1) Is provided with the air, thus achieving a more controlled and slower cooi g of the tube. In order to provide cooiinq by means of air, the annealing iine (T) Is i eqrated with the elongation line (A) to cool down the tube (1). with at least two waiis d owing to suCh cooling, the increase in the hardness values is prevented, as well as av iding the possibte corrosive effects that the water, which is used for cooling and contacting the tube (1), may cause on the surface rnateriai. In said annealing iin (T), there are presen he tunnel (6) and the serpentine sheeta (7). As seen in Fiqure-5, the tunnel stands on feet (9) in the annealing line (T). In order to avoid an excessively long annealing line (T), he tunnel forming said annealing line (T) Is surrounded by steel sheets (7) and in this man , the surface area of the tube (1) contacting the air Is increased. Then the cooled tubes (1) a e passed through the leakage test device (4.3) to subject the same to the leakage test. Th tubes (1) having been subjected to the leakage test are passed through the windlass pro (4.2) puiling the tube according to the machine speed and through the tubet stand (4.4), d thus are made ] 5 ready for delivery.
As a reauit, in order to incrrosse the qualily and reduce the cost for the production of the copper-brazed tube (1) with at least one layer, the annealing line (T) is i tegrated with the previously existing elongation iine (A) (21.5 meters) so that the total tengt of the elongation line (A) and the anneaiing line (T) is increased to 55 meters, and the coo ng of the copper-coated (1.2) tubes (1) with at least 2 walls is provided by means of air, i tead of water. In eddition, with the eniarpement-of the spool (10) diameters and the bearin s(11) in the tube shaping group (3), the oscillation of the band layer (8) Is reduced during w en the tube (1) is taking Its shape and smoother sectional surfaces are obtained.
The invention is the production process for the metal tube (1) with at least o walls, wherein the copper Is coated onto especially the steel sheet iayer (1.1) by means f the electrolysis method; two waN tube (1) is obtained by stagewise advancing from the ob ined sheet layer (1.1) with copper layer (1.2), the obtained two waii tube (1) Is permitted to each the brazing temperature, then it is heated at the brazing temperature by means of the electric contact points located in a mobile and spaced manner from one another and d imiting a heating zone, and is joined by means of copper braze heated up to the occurren e of the optimum brazing, and wherein seid process comprises the process step of coolin the tube (1) by providing its contact with air for a longer time along the elongation line (A) nd thm annealing iine - (T) by means of the anneaiing line (T) being integrated with the eion tion line (A), the diameters of the spool$ (10) have a vaiue of 49 mm ~ 0.02 and the bearing (11) have a size AMENDED SHEET
In the range 31 mm t 0.02 to 38 mm t 0.02 so that the oscillation of t band tayer (B) is reduced in the tube shaping group (3) and smoother sectional surfaces ar obtairwd.
The invention is the line, which has the band stand (2) carrying the pper-coated steel sheet, the vertir.sl spool group (3.1) and the horizontal spool group (3.2) abiing said band layers (8) to pass through said band stand (2) to take the shape of a tu (1), the furnace group (4,1) enabting the heating up to a temperature above the mefting int of tiw copper and preventing the cooling of the copper and also Its oxidation under th gas atmospher+e, the elongation line (A) enabling the tubes (1) to be transported to the i kage test devioe (4,3), wherein there is provided the annealing unit (4) having at least o e annealing line (1') being Integrated with the elongation line (A) to provide the contact of he copper coated tube with at ieast two walls (1) with the air, and also the vertical spool g ups (3.1) and the horizontal spool groups (3.2) are provided in said annealing unit (4) h ving at least one spool (10) with a size of 48 mm t 0.02 and at least one bearing (11) with size in the range 31 mm 10.02 to 38 mm 10.02, in order to docrease the osciilation of said and layer (8) and to enable smoother sectional surfaces to be obtained, and there are tso provided the tunnel (6) through which the tube (1) passes in the annealing line (T), and t least one shest (7) around said tunnel (6), which onablea to avoid an exeessiveiy long ann aiing line (T) and to increase the surface of the copper-coaled lube with at least one layer contact. with the air, said steel (7) being made of steel sheet.
The protective scope of this application is detemiined in the sectlon of cla s and the scope may by no means be limited to the description above provided only for e mplary purposes.
It Is obvious that a person skilled in the art may provide the Innovation t forward by the invvntion aiso by using the similar embodiments and/or apply this embodi ent to other fields with similar purpose used In the relevant art. Consequently, such o odiments would obviousiy tack the criterion of innovative step, and especially the criterio of exceeding the state of the art.
AMENDED SHEET
Claims (2)
1. The invention is the production process for the metal tube (1) with at least two walls, wherein the copper is coated onto the steel sheet layer (1.1) by means of the electrolysis method, two wall tube (1) is obtained by stagewise advancing from the obtained sheet layer (1.1) with copper layer (1.2), the obtained two wall tube (1) is permitted to reach the brazing temperature, then it is heated at the brazing temperature by means of the two electric contact points located in a mobile and spaced manner from one another and delimiting a heating zone and is joined by means of copper braze heated up to the occurrence of the optimum brazing, then the tube (1) is cooled by providing its contact with air for a longer time along the elongation line (A) and the annealing line (T) by means of the annealing line (T) being integrated with the elongation line (A), said process being characterized in that - the spools having 49 mm ~ 0.02 diameter and the bearings having a size in the range 31 mm ~ 0.02 to 38 mm ~ 0.02 are used to reduce oscillation of the land layer (8) and obtain smoother sectional surfaces in the tube shaping group (3) while said process step, said tube (1) obtaining from said copper costed steel sheet layer (1.1), is occurring.
2. The invention is the line, which has the band stand (2) carrying the copper-coated steel sheet, the vertical spool group (3.1) and the horizontal spool group (1.2) enabling said band layers (8) to pass through said band stand (2) to take the shape of a tube (1), the furnace group (4.1) enabling the heating up to a temperature above the melting point of the copper and preventing the cooling of the copper and also its oxidation under the gas atmosphere, the elongation line (A) enabling the tubes (1) to be transported to the leakage test device (4.3) and at least one annealing line (T) being integrated with said elongation line (A) providing the contact of the copper coated tube with at least two walls (1) with the air characterised in that .cndot. it comprises the vertical spool groups (3.1) and the horizontal spool groups (3.2) having at least one spool (10) with a size of 49 mm ~ 0.02 and at least one bearing (11) with a size in the range 31 mm ~ 0.02 to 38 mm ~ 0.02, in order to decrease the oscillation of said band layer (8) and to enable smoother sectional surface to be obtained.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2007/06266 | 2007-09-11 | ||
| TR2007/06266A TR200706266A2 (en) | 2007-09-11 | 2007-09-11 | Process of manufacturing of copper welded double layer steel pipe with long cooling line annealing method. |
| PCT/TR2008/000103 WO2009035425A1 (en) | 2007-09-11 | 2008-08-27 | Process for producing copper-brazed double wall steel tubes by means of long cooling line annealing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2699249A1 true CA2699249A1 (en) | 2009-03-19 |
Family
ID=40120243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2699249A Abandoned CA2699249A1 (en) | 2007-09-11 | 2008-08-27 | Process for producing copper-brazed double wall steel tubes by means of long cooling line annealing method |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA2699249A1 (en) |
| DE (1) | DE112008002490T5 (en) |
| TR (2) | TR200706266A2 (en) |
| WO (1) | WO2009035425A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020122820A1 (en) * | 2018-12-10 | 2020-06-18 | Net Boru Sanayi Ve Dis Ticaret Kollektif Sirketi Bora Saman Ve Ortagi | Heating system for production of a double-layer tube |
| CN111390321B (en) * | 2020-03-16 | 2024-07-19 | 浙江伟江电器股份有限公司 | Bottom surface brazing device and method for stainless steel electric heating appliance |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2373116A (en) * | 1941-10-31 | 1945-04-10 | Bundy Tubing Co | Method of uniting metals |
| JPH07258886A (en) | 1994-03-24 | 1995-10-09 | Nippon Steel Corp | Electrogalvannealed steel sheet excellent in spot weldability |
| US20030012909A1 (en) | 2000-03-10 | 2003-01-16 | Stephane Jung | Double-layer pipe |
| US6575197B2 (en) | 2001-09-04 | 2003-06-10 | Esser-Werke Kg | Double-layer pipe for fluidic transport of abrasive solids |
| TR200502248U (en) * | 2005-06-13 | 2005-09-21 | Beş Yapi Ürünleri̇ San. Ti̇c. Ltd Şti̇. | Stainless steel sheet raw material from band form into cylindrical pipe and welded as automation units |
-
2007
- 2007-09-11 TR TR2007/06266A patent/TR200706266A2/en unknown
-
2008
- 2008-08-27 WO PCT/TR2008/000103 patent/WO2009035425A1/en active Application Filing
- 2008-08-27 TR TR2010/00280T patent/TR201000280T2/en unknown
- 2008-08-27 DE DE112008002490T patent/DE112008002490T5/en not_active Withdrawn
- 2008-08-27 CA CA2699249A patent/CA2699249A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| TR200706266A2 (en) | 2007-12-24 |
| DE112008002490T5 (en) | 2010-09-23 |
| WO2009035425A1 (en) | 2009-03-19 |
| TR201000280T2 (en) | 2011-05-23 |
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| FZDE | Discontinued |
Effective date: 20130919 |