US2816356A - Method of making tube - Google Patents
Method of making tube Download PDFInfo
- Publication number
- US2816356A US2816356A US521991A US52199155A US2816356A US 2816356 A US2816356 A US 2816356A US 521991 A US521991 A US 521991A US 52199155 A US52199155 A US 52199155A US 2816356 A US2816356 A US 2816356A
- Authority
- US
- United States
- Prior art keywords
- tube
- strip
- bonding metal
- interfaces
- elongate
- 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.)
- Expired - Lifetime
Links
Images
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
Definitions
- the tube is subjected to a heat treatment to melt the' bonding metal-.
- the principal difficulty encountered is that tubing so fashioned and which is round in cross section twists on its axi's; This is due apparently to different metal conditions as to relative hardness and softness and to various strains set up in the metal. As a result, the seam' running lengthwise of the tube changes its position.
- the strip or wire of bonding metal When the strip or wire of bonding metal is rendered molten, it gravitates to the bottom of the tube, and if the seam is at the bottom of the tube, the bonding metal will iiow between the interfaces to unite the interfacesy upon solidication. However, if the tube twists so that in different longitudinal increments of the-tube the seam is displaced upwardly from the bottom of the tube, the molten metal cannot iiow in between the interfaces.
- the tubing is made inan inverted manner so that the seam is normally positioned lowermost. And furthermore, the tube is fashioned into a non-circular form in cross section so that it canbe guided and held in a position with the seam at the lower portionof the tube so that molten metal may iiow in. between the interfaces.
- the tubing thus formed in an inverted manner is fashioned so that it is of elongate form in cross section with the long axis disposed substantially vertically and the short axis disposed substantially horizontally.
- the tubing is preferably subjected to a treatment to give it a substantially round or circular form in cross section.
- Fig. 1 is a general View indicating an apparatus s well as method for fashioning the tube in accordance with the invention with continuous lengthwise movement of the strip through a tube forming mill, a heating zone, ay cooler, and arounding unit.
- Fig. 2 is a cross sectional view taken substantially on line 2--2 of Fig. 1 illustrating an early stage of the fashioning of the strip.
- Fig. 3 is a cross -sectional view taken substantially on lin'e -3-3 of Fig. 1 showingy nal forming rolls.
- Fig 4v is a cir-oss sectional view taken oriy line 4-4 of Fig.y 'l showing theftube as formed.
- Fig. 6 is a sectional view takenon line 6--6 ofaFig, 1 ⁇ illustrating sizing and rounding rolls.
- Fig.Y 7y is a view illustrating a furnace through which a plurality of tubes may be passedffor heatingthe same.
- Fig. 8 is an enlarged-sectional View taken substantial ly on line 8 8 ofFig. 7y illustrating a guide pipe inithe furnace.
- the strip 1 is drawnv fromM a supply coil 2 andit is passedwith lengthwise movement through a tube mill 4.
- the tube mill has forming rolls which fashions the strip transversely into hollow cross sectionall form.
- the strip is formed about Va mandrell 6 (Fig. 2), which is held by a bracket 8.
- This mandrel is hollow and a strip. or wire 10 ofbonding metal. is drawn from a supply roll -11 and' fed into the mandrel.
- Fig. 2 an early stage of the formation of the strip is indicated as well also as-the mandrel and the bonding metal within the vhollow mandrel.
- the strip is ⁇ preferably of steel and the bonding metal preferably of cop'- per.
- other metals may be employed:
- steel strip may be used ⁇ V with a bonding metalof solder, either hard or soft solder; the strip maybe Monel metal" with an appropriate bonding metal.-
- T he tube mill may be one of rather conventional form but' the rolls are grooved to form the strip intoelon# gate' hollow cross sectionalshape.
- the final rolls of the tubernill are shown at 15 and-16 andv itwill be seen in Fig. 3- that the mandrel has an elongate cross sectional form-andV that the rollsV 15 and -16' are grooved so as to form or wrap the metal of the strip with the elongate cross sectional form.
- the tube illustrated' is one fashioned froml a single strip of stock wherein the stock is rolled or fashioned through about 720 with the ⁇ edges thereof bevelled or scarfed and' fittedagainst an offset in the intermediateportion ofthe strip.v
- the t-ube is generally illustrated at T in Fig.
- the outsider edge-raft 17 and the inside edge at 18' The inner and outer pliesof the tube are formedI in tight interfacial enga-gement and the llocation where the edges 17. and 18 engage 'opposite sidesl of the intermediate part ofthe strip maybe considered the seam.
- the interfaces between the body of the strip and the edge 18 intersect theinner lsurface of the tube. The tube thus kformed can be guided' and held so that the seam is held lowemiost or, in7 other words, at the lower terminal of the long axis.
- Fig. 1 the strip -and-l tube are moved continuously and as the tube emerges from the tube mill it enters ahe'ating zone.
- This may bel in the form of a housing. 20" into which a non-oxidizing or reducing gas may beV entered through a pipe 21.
- This heating zone is 'of the electrical resistance variety.
- a transformer has a' primary 33 connectedv to ⁇ a suitable source of electrical current.
- One side of the secondary Z8 is connected to the electrode roller 23 by a conductor 30.
- the other side of the secondary is connected to the" electrode 22 by a conductor 31 ⁇ and to the electrode 24 by a conductor 32.
- The' metal will not iloW out from-between the'inter'f'aeesf 3 which intersect the outer surface of the tube at the edge 17 because the caoillarv snare ceases at that point.
- the tube leaves the heating zone and enters a cooler generallv indicated at 35.
- This cooler is preferably of the iacketed tvoe having an outer casing 36. and an inner casing 37. through which the tube travels.
- the inner tube or iacket 37 mav be shaped, particularly for a portion of its length. to guide the tube and hold the seam down.
- Coolingl water may be passed between the iackets and may bei introduced through a pine 40 and discharged from pipe 41.
- the gas introduced through the pipe 21 may flow both upstream and downstream with some of the gas burning oft ⁇ at the inlet to the heating chamber and some discharging from the outlet end of the cooler.
- a sizing and rounding unit generally illustrated at 44. It comprises a series of suitably formed rolls which engage the tube and change its elongate cross sectional form into rounded form. The final rolls are indicated at 45 and 46 and the tube is given a circular or rounded form as indicated in Fig. 6.
- the strip moves successively through the forming mill, the heating zone, the cooler, and the rounding and sizing unit.
- the strip may move at fairly high speed because it can be rapidly heated by electrical resistance.
- the method may be carried out by separating the heating unit and cooling unit from the tube mill and rounding unit.
- a suitable furnace is shown in Fig. 7 at 50 through which a plurality of tubes may be simul taneously passed.
- the tubes may be fed into the furnace by driving rollers 51 and S2.
- the furnace is suitably heated to raise the temperature of the tubes and melt the copper ⁇ inside the same.
- the furnace may be supplied with a non-oxidizing or reducing gas through an inlet pipe 55 and this gas may escape from the inlet of the furnace and the outlet of the cooler.
- the furnace is provided with a guide pipe for each tube.
- a guide pipe for each tube.
- Such a guide pipe is shown in Fig. 8 at 56. It will be noted that the guide pipe is of elongate form 1n cross section to more or less fit the tube.
- the tube mill is separated from the furnace and tubes are formed rapidly thereby and cut into lengths. A plurality of the tubes are passed simultaneously through the furnace 50.
- the tubes pass through the furnace ft much slower than they are made in the tube mill but by passing a plurality of tubes simultaneously through the furnace, the overall output of the furnace may substantially correspond to the ⁇ output of the tube mill.
- the tube of elongate form lin cross section can be held with facility so that the seam is maintained lowermost.
- the wire or strip of bonding metal is rendered molten, it has access to the interfaces where the interfaces intersect the inside surface of the tube.
- thc electrodes and the back up rollers serve to hold the tube in proper position.
- the respective guide pipes hold the tubes in proper position. It is not necessary to the invention that the seam in all increments of the tube remain accurately at the lower terminal of the long axis of the elongate form.
- the method of making tube from strip metal stock comprising, moving the strip lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, bringing the edges of the strip into proximity with each other and with interfacing portions substantially at the lower terminal of the long axis, feeding a strip ofbonding metal into the tube interior as it is being formed, passing the tube through a heating zone to melt the bonding metal, while utilizing the elongate form of the tube as a guide means for maintaining said edges substantially at the lower terminal part of the long axis, whereby the molten bonding metal, which gravitates to the lower portion of the elongate form, flows by capillarity between the interfaces, and cooling the tube to solidify the bonding metal and unite the interfaces.
- the method of making tube from strip metal stock comprising, moving the strip lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, bringing the edges of the strip into proximity with each other and with interfacing portions substantially at the lower terminal of the long axis, feeding a strip of bonding metal into the tube interior as it is being formed, passing the tube through a heating zone to melt the' bonding metal, while utilizing the elongate form of the tube as a guide means for maintaining said edges substantially at the lower terminal part of the long axis, whereby the molten bonding metal, which gravitates to the lower portion of the elongate form, flows by capillarity between the interfaces, cooling the tube to solidify the bonding metal and unite the interfaces, then treating the tube to change the elongate cross sectional form to a substantially round form.
- the method of making tube with a double thickness wall from strip metal stock which comprises, moving the strip stock lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, and with inner and outer plies in interfacial relationship, bringing edge portions of the strip stock into proximity with each other substantial at the lower terminal of the long axis, feeding a strip of bonding metal into the tube interior as it is being formed, passing the tubethrough a heating zone to melt the bonding metal, while guiding the tube through the agency of its elongate fornito maintain said edges substantially at the lower ⁇ terminal of the long axis, whereby the molten bonding metal, which gravitates to the lower portion of the elongate form, flows by capillarity 'between the interfaces, cooling the tube to solidify the bonding metal and unite the interfaces, then treating the tube to change the elongate cross sectional form to a substantially round form.
- the method of making tube with a double thickness wall from a single strip of steel stock which comprises, moving the strip lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, and with inner and outer plies in interfacial relationship, bringing the edges of the strip into proximity with each other on opposite sides of the intermediate part of the strip and substantially at the lower terminal of the long axis, feeding a strip of copper into the tube interior as it is being formed, passing the tube through a heating zone to melt the copper while utilizing the elongate form of the tube to guide the tube to maintain said edges substantially at the lower terminal of the long axis, whereby the molten copper which gravitates to the lower portion of the elongate form, ows by capillarity between the interfaces, cooling the tube to solidify the copper and unite the interfaces, and then treating the tube to change the elongate cross sectional form to a substantially round form.
- the method of making tube from strip metal stock comprising, moving the strip lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, bringing the edges of the strip into proximity with each other and with interfacing portions substantially at the lower terminal of the long axis, feeding a strip of bonding metal into the tube interior as it is being formed, passing the tube with continuous movement through a heating zone to melt the bonding metal, while maintaining said edges substantially at the lower terminal part of the long axis by utilizing the elongate form of the tube as a guide means, whereby the molten bonding metal, which gravitates to the lower portion of the elongate form, ows by capillarity between the interfaces, cooling the tube to solidify the bonding metal and unite the interfaces, then treating the tube to change the elongate cross sectional form to a substantially round form.
- the method of making tube from strip metal stock which comprises, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, bringing the edges of the strip into proximity with each other substantially at the lower terminal of the long axis to form interfacial portions, placing a strip of bonding metal into the tube interior, passing the tube through a heating zone to melt the bonding metal, while utilizing the elongate form of the tube for guiding the tube to maintain said edges substantially at the lower terminal of the long axis, whereby the molten bonding metal, which gravitates to the lower portion of the elongate form, flows by capillarity between the interfaces, cooling the tube to solidify the bonding metal and unite the interfaces, and then treating the tube to change the elongate cross sectional form to a substantially round form.
- the method of making tube from strip metal stock comprising, moving the strip lengthwise and fashioning it into tubing of acircular cross section with the strip edges in proximity with each other to form a seam area having interfaces generally at the lowermost portion of the tube, introducing a body of bonding metal into the tube interior ⁇ as it is being formed and, while utilizing the acircular shape of the tube as a guide means to maintain said seam area generally at its lowermost portion, passing the tube through a heating zone to melt the bonding metal, so that the molten bonding metal g-ravitates to the seam area and flows by capillarity between the interfaces, and cooling the tube to solidify the bonding metal and unite the interfaces.
- the method of making tube from strip metal stock comprising, moving the strip lengthwise and fashioning it into tubing of acircular cross section with the strip edges in proximity with each other to form a seam area having interfaces generally at the lowermost portion of the tube, the slope of the portions of the tube wall adjacent said seam area being relatively greater than that of the tube in its finished form, introducing a body of bonding metal into the tube interior as it is being formed, and, while utilizing the acircular shape of the tube as a guide means to maintain said seam area generally at its lowermost portion, passing the tube through a heating zone to melt the bonding metal, so that the molten bonding metal gravitates to the seam area and flows by capillarity between the interfaces, with said portions of the tube wall adjacent said seam area forming a trough facilitating such flow to said seam area, cooling the tube to solidify the bonding metal and unite the interfaces, and treating the tube to decrease said slope of said wall portions and to change the acircular cross sectional form to a substantially round form.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
Description
Dec. 17, 1957 METHOD OF MAKING TUBE Filed July 14, 1955 R. H, HoBRocK INVENTOR.
bja/mw TTOQNEKS.
United States Patent O This invention relates to the method of makingy tube` fromstrip metal? stock and it is-directed particularly tok the makingof tubel where the strip is moved-lengthwise, fashioned into tubing with interfacial portions, and the interfaces united by a bonding metal which has been rendered-l molten.v
Muchtubing of this type has been made fromv strip ste'el1 stock;` wherein the interfaces` are united by copper The principal objectv of this linvention is toy provide` aY processfor making tube from bare strip stock thus dispensing withthe necessity of applying the bonding metal t'othe strip in the form of a coating or film. Inv accordaneewith the' invention the bondingmetal isy introduced intothe tube in the form of a strip or wire. The tube is subjected to a heat treatment to melt the' bonding metal-.- The principal difficulty encountered is that tubing so fashioned and which is round in cross section twists on its axi's; This is due apparently to different metal conditions as to relative hardness and softness and to various strains set up in the metal. As a result, the seam' running lengthwise of the tube changes its position.
When the strip or wire of bonding metal is rendered molten, it gravitates to the bottom of the tube, and if the seam is at the bottom of the tube, the bonding metal will iiow between the interfaces to unite the interfacesy upon solidication. However, if the tube twists so that in different longitudinal increments of the-tube the seam is displaced upwardly from the bottom of the tube, the molten metal cannot iiow in between the interfaces.
In accordance with this invention the tubing is made inan inverted manner so that the seam is normally positioned lowermost. And furthermore, the tube is fashioned into a non-circular form in cross section so that it canbe guided and held in a position with the seam at the lower portionof the tube so that molten metal may iiow in. between the interfaces. Preferably, the tubing thus formed in an inverted manner is fashioned so that it is of elongate form in cross section with the long axis disposed substantially vertically and the short axis disposed substantially horizontally. After the bonding of the interfaces, the tubing is preferably subjected to a treatment to give it a substantially round or circular form in cross section.
The invention is disclosed in the accompanying drawings:
Fig. 1 is a general View indicating an apparatus s well as method for fashioning the tube in accordance with the invention with continuous lengthwise movement of the strip through a tube forming mill, a heating zone, ay cooler, and arounding unit.
Fig. 2 is a cross sectional view taken substantially on line 2--2 of Fig. 1 illustrating an early stage of the fashioning of the strip.
Fig. 3 is a cross -sectional view taken substantially on lin'e -3-3 of Fig. 1 showingy nal forming rolls.
Fig 4v is a cir-oss sectional view taken oriy line 4-4 of Fig.y 'l showing theftube as formed.
2,816,356 Patented Dec. 1.7,- 1957 ICC Fig. 5 is ai sectional view takeny on line 5-5 ofvFig. 1 illustrating the cooler.
Fig. 6 is a sectional view takenon line 6--6 ofaFig, 1` illustrating sizing and rounding rolls.
Fig.Y 7y is a view illustrating a furnace through which a plurality of tubes may be passedffor heatingthe same.
Fig. 8 is an enlarged-sectional View taken substantial ly on line 8 8 ofFig. 7y illustrating a guide pipe inithe furnace.
Referring first to Figi- 1, the strip 1 is drawnv fromM a supply coil 2 andit is passedwith lengthwise movement through a tube mill 4. The tube mill has forming rolls which fashions the strip transversely into hollow cross sectionall form. The strip is formed about Va mandrell 6 (Fig. 2), which is held by a bracket 8. This mandrel is hollow and a strip. or wire 10 ofbonding metal. is drawn from a supply roll -11 and' fed into the mandrel. In Fig. 2 an early stage of the formation of the strip is indicated as well also as-the mandrel and the bonding metal within the vhollow mandrel. The strip is` preferably of steel and the bonding metal preferably of cop'- per. However, other metals may be employed: For example, steel strip may be used`V with a bonding metalof solder, either hard or soft solder; the strip maybe Monel metal" with an appropriate bonding metal.-
T he tube mill may be one of rather conventional form but' the rolls are grooved to form the strip intoelon# gate' hollow cross sectionalshape. The final rolls of the tubernill are shown at 15 and-16 andv itwill be seen in Fig. 3- that the mandrel has an elongate cross sectional form-andV that the rollsV 15 and -16' are grooved so as to form or wrap the metal of the strip with the elongate cross sectional form. The tube illustrated' is one fashioned froml a single strip of stock wherein the stock is rolled or fashioned through about 720 with the` edges thereof bevelled or scarfed and' fittedagainst an offset in the intermediateportion ofthe strip.v The t-ube is generally illustrated at T in Fig. 4, the outsider edge-raft 17 and the inside edge at 18'. The inner and outer pliesof the tube are formedI in tight interfacial enga-gement and the llocation where the edges 17. and 18 engage 'opposite sidesl of the intermediate part ofthe strip maybe considered the seam. The interfaces between the body of the strip and the edge 18 intersect theinner lsurface of the tube. The tube thus kformed can be guided' and held so that the seam is held lowemiost or, in7 other words, at the lower terminal of the long axis.
In Fig. 1 the strip -and-l tube are moved continuously and as the tube emerges from the tube mill it enters ahe'ating zone. This may bel in the form of a housing. 20" into which a non-oxidizing or reducing gas may beV entered through a pipe 21. This heating zone is 'of the electrical resistance variety. There are three roller electrodes 2v2, 23 and 24 with backup rolls' 25, 26 and' A transformer has a' primary 33 connectedv to `a suitable source of electrical current. One side of the secondary Z8 is connected to the electrode roller 23 by a conductor 30. The other side of the secondary is connected to the" electrode 22 by a conductor 31` and to the electrode 24 by a conductor 32. By connecting one side of the sectondary to the two outside electrodes the problemsd of:
The' metal will not iloW out from-between the'inter'f'aeesf 3 which intersect the outer surface of the tube at the edge 17 because the caoillarv snare ceases at that point.
The tube leaves the heating zone and enters a cooler generallv indicated at 35. This cooler is preferably of the iacketed tvoe having an outer casing 36. and an inner casing 37. through which the tube travels. The inner tube or iacket 37 mav be shaped, particularly for a portion of its length. to guide the tube and hold the seam down. However. after the bonding metal has solidified there is no further need of guiding the tube in the cooler but. of course. it is engaged and held positioned by the rools of the sizing and rounding unit. Coolingl water may be passed between the iackets and may bei introduced through a pine 40 and discharged from pipe 41. The gas introduced through the pipe 21 may flow both upstream and downstream with some of the gas burning oft` at the inlet to the heating chamber and some discharging from the outlet end of the cooler.
With continuous movement the tube now passes through a sizing and rounding unit generally illustrated at 44. It comprises a series of suitably formed rolls which engage the tube and change its elongate cross sectional form into rounded form. The final rolls are indicated at 45 and 46 and the tube is given a circular or rounded form as indicated in Fig. 6. In the process just described, the strip moves successively through the forming mill, the heating zone, the cooler, and the rounding and sizing unit. The strip may move at fairly high speed because it can be rapidly heated by electrical resistance. However, the method may be carried out by separating the heating unit and cooling unit from the tube mill and rounding unit. A suitable furnace is shown in Fig. 7 at 50 through which a plurality of tubes may be simul taneously passed. The tubes may be fed into the furnace by driving rollers 51 and S2. The furnace is suitably heated to raise the temperature of the tubes and melt the copper `inside the same. As the tubes pass from the furnace they pass into cooler tubes 53 and when cooled to the point where they may be introduced to the atmosphere without objectionable oxidation they may pass out onto a support 54. The furnace may be supplied with a non-oxidizing or reducing gas through an inlet pipe 55 and this gas may escape from the inlet of the furnace and the outlet of the cooler.
The furnace is provided with a guide pipe for each tube. Such a guide pipe is shown in Fig. 8 at 56. It will be noted that the guide pipe is of elongate form 1n cross section to more or less fit the tube. In practicing lthe method of this invention with the furnace 50, the tube mill is separated from the furnace and tubes are formed rapidly thereby and cut into lengths. A plurality of the tubes are passed simultaneously through the furnace 50. The tubes pass through the furnace ft much slower than they are made in the tube mill but by passing a plurality of tubes simultaneously through the furnace, the overall output of the furnace may substantially correspond to the `output of the tube mill. After the tubes pass through the furnace and are cooled they may then be passed through the rounding and sizing unit 44 which, of course, in this instance, will not be necessarily inline with the tube mill.
In either case, the tube of elongate form lin cross section can be held with facility so that the seam is maintained lowermost. Thus, when the wire or strip of bonding metal is rendered molten, it has access to the interfaces where the interfaces intersect the inside surface of the tube. When the system is used with the resistance heating zone, as shown in Fig. 1, thc electrodes and the back up rollers serve to hold the tube in proper position. When the tubes are passed through the furnace 50 the respective guide pipes hold the tubes in proper position. It is not necessary to the invention that the seam in all increments of the tube remain accurately at the lower terminal of the long axis of the elongate form. It is .4 sutiicient that the seam be held suiciently near the low ermost lportion of the tube or, in other words, near the lower terminal of the long axis to permit the molten copper to have access thereto and thus flow in between the interfaces. The terminology in the claims appended hereto are to be read with this interpretation.
I claim:
1. The method of making tube from strip metal stock comprising, moving the strip lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, bringing the edges of the strip into proximity with each other and with interfacing portions substantially at the lower terminal of the long axis, feeding a strip ofbonding metal into the tube interior as it is being formed, passing the tube through a heating zone to melt the bonding metal, while utilizing the elongate form of the tube as a guide means for maintaining said edges substantially at the lower terminal part of the long axis, whereby the molten bonding metal, which gravitates to the lower portion of the elongate form, flows by capillarity between the interfaces, and cooling the tube to solidify the bonding metal and unite the interfaces.
2. The method of making tube from strip metal stock comprising, moving the strip lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, bringing the edges of the strip into proximity with each other and with interfacing portions substantially at the lower terminal of the long axis, feeding a strip of bonding metal into the tube interior as it is being formed, passing the tube through a heating zone to melt the' bonding metal, while utilizing the elongate form of the tube as a guide means for maintaining said edges substantially at the lower terminal part of the long axis, whereby the molten bonding metal, which gravitates to the lower portion of the elongate form, flows by capillarity between the interfaces, cooling the tube to solidify the bonding metal and unite the interfaces, then treating the tube to change the elongate cross sectional form to a substantially round form.
3. The method of making tube with a double thickness wall from strip metal stock which comprises, moving the strip stock lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, and with inner and outer plies in interfacial relationship, bringing edge portions of the strip stock into proximity with each other substantial at the lower terminal of the long axis, feeding a strip of bonding metal into the tube interior as it is being formed, passing the tubethrough a heating zone to melt the bonding metal, while guiding the tube through the agency of its elongate fornito maintain said edges substantially at the lower `terminal of the long axis, whereby the molten bonding metal, which gravitates to the lower portion of the elongate form, flows by capillarity 'between the interfaces, cooling the tube to solidify the bonding metal and unite the interfaces, then treating the tube to change the elongate cross sectional form to a substantially round form.
4. The method of making tube with a double thickness wall from a single strip of metal `stock which coinprises, moving the strip lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, and with inner and outer plies in interfacial relationship, bringing thev edges of the strip into proximity with each other on opposite sides of the intermediate part of the strip and substantially at the lower terminal of the long axis, feeding a strip of bonding metal into the tube interior as it is being formed, passing the tube through a heating zone to melt the bonding metal while utilizing the elongate forrn of the tube to guide the tube to maintain said edges susbtantially at the lower terminal of the long axis, whereby the molten bonding metal which gravitates to the lower portion of the elongate form, flows 'by capillarity between the interfaces, cooling the tube to solidify the bonding metal and unite the interfaces, and then treating the tube to change the elongate cross sectional form to a substantially round form.
5. The method of making tube with a double thickness wall from a single strip of steel stock which comprises, moving the strip lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, and with inner and outer plies in interfacial relationship, bringing the edges of the strip into proximity with each other on opposite sides of the intermediate part of the strip and substantially at the lower terminal of the long axis, feeding a strip of copper into the tube interior as it is being formed, passing the tube through a heating zone to melt the copper while utilizing the elongate form of the tube to guide the tube to maintain said edges substantially at the lower terminal of the long axis, whereby the molten copper which gravitates to the lower portion of the elongate form, ows by capillarity between the interfaces, cooling the tube to solidify the copper and unite the interfaces, and then treating the tube to change the elongate cross sectional form to a substantially round form.
6. The method of making tube from strip metal stock comprising, moving the strip lengthwise, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, bringing the edges of the strip into proximity with each other and with interfacing portions substantially at the lower terminal of the long axis, feeding a strip of bonding metal into the tube interior as it is being formed, passing the tube with continuous movement through a heating zone to melt the bonding metal, while maintaining said edges substantially at the lower terminal part of the long axis by utilizing the elongate form of the tube as a guide means, whereby the molten bonding metal, which gravitates to the lower portion of the elongate form, ows by capillarity between the interfaces, cooling the tube to solidify the bonding metal and unite the interfaces, then treating the tube to change the elongate cross sectional form to a substantially round form.
7. The method of making tube from strip metal stock which comprises, fashioning the strip into tubing of elongate form in cross section with the long axis disposed substantially vertically, bringing the edges of the strip into proximity with each other substantially at the lower terminal of the long axis to form interfacial portions, placing a strip of bonding metal into the tube interior, passing the tube through a heating zone to melt the bonding metal, while utilizing the elongate form of the tube for guiding the tube to maintain said edges substantially at the lower terminal of the long axis, whereby the molten bonding metal, which gravitates to the lower portion of the elongate form, flows by capillarity between the interfaces, cooling the tube to solidify the bonding metal and unite the interfaces, and then treating the tube to change the elongate cross sectional form to a substantially round form.
8. The method of making tube from strip metal stock comprising, moving the strip lengthwise and fashioning it into tubing of acircular cross section with the strip edges in proximity with each other to form a seam area having interfaces generally at the lowermost portion of the tube, introducing a body of bonding metal into the tube interior `as it is being formed and, while utilizing the acircular shape of the tube as a guide means to maintain said seam area generally at its lowermost portion, passing the tube through a heating zone to melt the bonding metal, so that the molten bonding metal g-ravitates to the seam area and flows by capillarity between the interfaces, and cooling the tube to solidify the bonding metal and unite the interfaces.
9. The method of making tube from strip metal stock comprising, moving the strip lengthwise and fashioning it into tubing of acircular cross section with the strip edges in proximity with each other to form a seam area having interfaces generally at the lowermost portion of the tube, the slope of the portions of the tube wall adjacent said seam area being relatively greater than that of the tube in its finished form, introducing a body of bonding metal into the tube interior as it is being formed, and, while utilizing the acircular shape of the tube as a guide means to maintain said seam area generally at its lowermost portion, passing the tube through a heating zone to melt the bonding metal, so that the molten bonding metal gravitates to the seam area and flows by capillarity between the interfaces, with said portions of the tube wall adjacent said seam area forming a trough facilitating such flow to said seam area, cooling the tube to solidify the bonding metal and unite the interfaces, and treating the tube to decrease said slope of said wall portions and to change the acircular cross sectional form to a substantially round form.
References Cited in the file of this patent UNITED STATES PATENTS 2,210,338 Quarnstrom Aug. 6, 1940 2,234,450 Quarnstrom Mar. l1, 1941 2,255,472 Quarnstrom Sept. 9, 1941 2,618,845 Quarnstrom Nov. 25, 1952
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US521991A US2816356A (en) | 1955-07-14 | 1955-07-14 | Method of making tube |
ES0226985A ES226985A1 (en) | 1955-07-14 | 1956-02-29 | Method of making tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US521991A US2816356A (en) | 1955-07-14 | 1955-07-14 | Method of making tube |
Publications (1)
Publication Number | Publication Date |
---|---|
US2816356A true US2816356A (en) | 1957-12-17 |
Family
ID=24078979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US521991A Expired - Lifetime US2816356A (en) | 1955-07-14 | 1955-07-14 | Method of making tube |
Country Status (2)
Country | Link |
---|---|
US (1) | US2816356A (en) |
ES (1) | ES226985A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2975087A (en) * | 1957-09-03 | 1961-03-14 | Electrarc Inc | Method and apparatus for making shielded wire |
DE1122916B (en) * | 1958-06-16 | 1962-02-01 | Gen Motors Corp | Process for the production of soldered steel pipes from strip covered on their inner surface with a non-ferrous metal layer |
DE1125867B (en) * | 1958-06-16 | 1962-03-22 | Gen Motors Corp | Process for the production of soldered steel pipes covered on their inner surface with a non-ferrous metal layer |
US3029914A (en) * | 1958-11-25 | 1962-04-17 | Macomber Inc | Laminated tubular section structural members |
US3158181A (en) * | 1959-05-11 | 1964-11-24 | Gore & Ass | Polymeric tubate product and process |
US3474522A (en) * | 1967-05-10 | 1969-10-28 | Anaconda American Brass Co | Method for changing the width of a strip metal and for forming tubes therefrom |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2210338A (en) * | 1938-07-30 | 1940-08-06 | Bundy Tubing Co | Method of making tubes |
US2234450A (en) * | 1938-10-14 | 1941-03-11 | Bundy Tubing Co | Method for making tubes |
US2255472A (en) * | 1938-02-28 | 1941-09-09 | Bundy Tubing Co | Tube and method of making tube |
US2618845A (en) * | 1946-04-15 | 1952-11-25 | Bert L Quarnstrom | Method of making tubes |
-
1955
- 1955-07-14 US US521991A patent/US2816356A/en not_active Expired - Lifetime
-
1956
- 1956-02-29 ES ES0226985A patent/ES226985A1/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2255472A (en) * | 1938-02-28 | 1941-09-09 | Bundy Tubing Co | Tube and method of making tube |
US2210338A (en) * | 1938-07-30 | 1940-08-06 | Bundy Tubing Co | Method of making tubes |
US2234450A (en) * | 1938-10-14 | 1941-03-11 | Bundy Tubing Co | Method for making tubes |
US2618845A (en) * | 1946-04-15 | 1952-11-25 | Bert L Quarnstrom | Method of making tubes |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2975087A (en) * | 1957-09-03 | 1961-03-14 | Electrarc Inc | Method and apparatus for making shielded wire |
DE1122916B (en) * | 1958-06-16 | 1962-02-01 | Gen Motors Corp | Process for the production of soldered steel pipes from strip covered on their inner surface with a non-ferrous metal layer |
DE1125867B (en) * | 1958-06-16 | 1962-03-22 | Gen Motors Corp | Process for the production of soldered steel pipes covered on their inner surface with a non-ferrous metal layer |
US3029914A (en) * | 1958-11-25 | 1962-04-17 | Macomber Inc | Laminated tubular section structural members |
US3158181A (en) * | 1959-05-11 | 1964-11-24 | Gore & Ass | Polymeric tubate product and process |
US3474522A (en) * | 1967-05-10 | 1969-10-28 | Anaconda American Brass Co | Method for changing the width of a strip metal and for forming tubes therefrom |
Also Published As
Publication number | Publication date |
---|---|
ES226985A1 (en) | 1956-04-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2816356A (en) | Method of making tube | |
US1930191A (en) | Tube | |
US2234450A (en) | Method for making tubes | |
US2959849A (en) | Method and apparatus for making pipe | |
US2092018A (en) | Method of making tubes and copper coating process | |
US2618845A (en) | Method of making tubes | |
US2014982A (en) | Method of making tubes | |
US1794902A (en) | Manufacture of metal-sheathed cables | |
EP0016099A1 (en) | Method and installation for manufacturing multilayer pipes | |
JPS6186093A (en) | Method and device for manufacturing powder filling tubular welding electrode | |
US1616861A (en) | Method and apparatus for manufacturing tubing | |
US2084268A (en) | Tube making and copper coating process | |
US2025148A (en) | Apparatus for the manufacture of pipes and tubes | |
US1465755A (en) | Method of making tubes | |
US3474522A (en) | Method for changing the width of a strip metal and for forming tubes therefrom | |
US2005125A (en) | Apparatus for sinking tubular work pieces | |
US2215933A (en) | Method of making tubing | |
US2776474A (en) | Method of continuously producing welded pipe | |
US3090336A (en) | Spiral pipe welding machine | |
US2017360A (en) | Method of sinking welded tubes | |
US1510932A (en) | Tube machine | |
US3101401A (en) | Method for the manufacture of hollow bodies | |
US1475258A (en) | Method of manufacturing soldered tube | |
US1149697A (en) | Method of making butt-weld pipes. | |
US3189992A (en) | Pipe forming |