US2770867A - Arrangements for carrying out continuous processes on long rigid articles - Google Patents

Arrangements for carrying out continuous processes on long rigid articles Download PDF

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Publication number
US2770867A
US2770867A US256946A US25694651A US2770867A US 2770867 A US2770867 A US 2770867A US 256946 A US256946 A US 256946A US 25694651 A US25694651 A US 25694651A US 2770867 A US2770867 A US 2770867A
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United States
Prior art keywords
carriage
arrangements
tube
speed
forwarding
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
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US256946A
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English (en)
Inventor
Spencer James Arthur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Balfour Beatty PLC
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BICC PLC
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Publication date
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Publication of US2770867A publication Critical patent/US2770867A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F99/00—Subject matter not provided for in other groups of this subclass
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5187—Wire working

Definitions

  • This invention concerned with conditions which arise in performing as a continuous process two Ioperations in succession 4on a long suiciently rigid article, for instance a tube, a rod, or some forms of electric cables, wherein each operation involves, or is accompanied by, the fo-rwarding of the article along a line of travel.
  • the article may be fed from a source of supply to one piece of apparatus in which the rst operation is performed, then passed from it to the second apparatus in which another operation is performed andthen be withdrawn from the apparatus.
  • one of the forwarding means is mounted on a carriage which is movable through a short dis- .tance in the line of travel of the article against a centralizing force.
  • this carriage When this carriage is displaced from the central position in either sense it acts upon control gear which iniiuences the speed of ⁇ one yofthe forwarding-means so as to adjust it in the sense required to produce correction of the condition which has caused the displacement.
  • the displacement of the carriage is brought about by the force exerted on it by the rigid article being treated ⁇ owing to the fact that it is being forwarded at different or non-coordinated speeds at different poi-nts in the length under treatment.
  • the forwarding means of the second operation in order of succession is causing .the article to travel at a speed greater than that correspending to .the speed of the forwarding'apparatus of the first operation, ythere is tension in the article between the two stages of treatment and this pulls the movable carriage away from its central position. This can be corrected by reducing they speedof the second forwarding means or increasing the speed of the iirst forwarding means.
  • Locking lmeans for the movable carriage may be pro- (lll y 2,770,867 ,l Patented Nov. 20,1956
  • Gear associated with the forwarding means which it is appropriate to mount on the movable carriage with such means may bev gear which depends for its operation on themaintenanc'eof a denite relationship with the forwarding means, which relationship would be disturbed by any abnormal relative displacement.
  • the operationperformed may include the forwarding movement as an inherent part for instance in drawing through a die, or the operation mayjbe associated with the forwarding movement for the purpose of a continuous process, for instance in the making of a trains by welding or soldering.
  • the movable carriage is preferably supported by suspension, the suspending members, two or more in number, being so formed as to oier sui'lcient transverse restraint to the carriage to avoid the necessity for lateral 'guides with ytheir accompanying friction.
  • the suspendingrv members preferably valso embody or consist of plate or strip springs cooperating to centralize the lcarriage and to permit small displacementsy longitudinally in either sense.
  • Other forms of support may, however, be adopted, for instance a support ,similar to that above mentioned, but standing up from below instead o-f hanging down from above, or a table sliding Vor running on rolls in longitudinal guides with centralizing springs actinglongitudinally in oppositedirections.
  • Figures 1A and lB together represent a View inelevation ofthe completefapparatus
  • Figures 2A and 2B are respective plan views of Figures lA'and 1B; 1 l
  • Figure 3 is an end view of the apparatus as seen in the direction of .the arrow III in Figure 1A;
  • Figure 4 is a view in elevation of the switch cont-rolling the speed adjustment
  • Figure 5 is a view of the arrangement sho-wn in Figure 4, taken on the line V--V and as seenin the direction of the-arrows;
  • Figure 6.1 a circuit diagram of the connections to' the speed-controlling arrangements.
  • the apparatus is arranged to ⁇ apply a sheath I of aluminum to a core 2 comprising an insulated cable conductor.
  • the ⁇ sheath I is formed from a tlat strip 3 which is progressively folded about the core, the abutting longitudinal edgesbeing weldedy together toforma tube 4 loose on .the core Zand the' tube. being subsequently drawn through a die 5 which" reduces it to 'aftight fitting sheath on the core.
  • the apparatus is in two distinct portions, namely, the tube-forming device which' comprises the arrangements in Figure lA excluding the die 5, and the drawing down device comprising the die 5 and the haul-olf arrangements shown: in Figure 1B.
  • The'lirst part forms the 'tube 4' fro-m the strip Srwith4 the core 2 inserted as the ⁇ tube is formed, and makes the seam; the second part reduces the diameter ⁇ ofthe tube.
  • the length of the tube is correspondingly increased, so that therate of'travel of the nished articleV leaving the die 5 is greater than that of thefstrip and of the-rate ofl seaming in the first part of the apparatus.v i f
  • the ⁇ movement of the tube 4 through lthe rst-part of the device is obtainedy by means of a doublet caterpillar haulage 6 electrically driven by an independent motor 7.
  • variable gear 10 is drawn through the sinking dieS in the second stage by means of a capstan .driven by an'elec'- tric'motor 9 ⁇ through Va variable speedV gear v'10. 'I'he control ofrspeedis effected yby means of this second drive, the variable gear 10 being'adapted to be automatically adjusted by a ⁇ reversible auxiliary motor 11 controlled by switching arrangements described hereinafter.
  • the tube-forming device is supported on a carriage 12 suspended so as to be movable within pre-determined limits in the direction ofvmovernent of the strip 3 through the machine. ⁇
  • the line of travel of the strip 3 from the commencement of ⁇ its formation into the'tube 4 to the contact between the finished cable I withy the capstan l8 is4 a straight line.
  • the distance between the delivery end of the caterpillar haulage 6 and the sinking die 5 is comparatively short and in this short space the workpiece has the form of a comparatively rigid seamed tube 4 which is a loose tit on the cable body 2 within it. It is in this space that the tube 4 may be subjected to forces of tension or compression as a result of relative variation in the haul-off speeds in the twoparts of the machine.
  • the carriage 12 comprises a long narrow horizontal frame, substantially rectangular as seen in plan, and consisting of two side members 13, 13 and a number of cross pieces 14.
  • the forward portion of the frame is at a lower level than the rearward portion in order to accommodate the caterpillar haulage 6.
  • the carriage 12 is suspended at cach end ⁇ and in a portal formed by two vertical pillars 15, 15 and a horizontal cross bar 16 at the top.
  • a cross braced rectangular frame 17 conveniently formed of tubular members and constituting a link between two flat springs 18, 18 attached to the girder 16 and two similar flat springs 19, 19 attached to the back of the carriage 12.
  • Each at spring 18 or 19 is in the form of a plate having its plane disposed transversally to the direction of movement of the tubeforming strip 3.
  • Each of the upper springs 18 is anchored in a bracket 20 by two bolts 21, 21 the bracket 20 being bolted to the cross piece 16.
  • Each of the lower springs 19 is firmly attached to a vertical face 22at the back of the carriage by two bolts 23, 23.
  • Each spring is rigidly fastened to the link ⁇ 17 by two bolts 24, 24.
  • the breadth of the at springs 18 and 19, the rigid construction of the link 17 and the rigid attachment of the springs 18, 19 to the carriage 12, to the upper cross piece 16 and to the link 17 are such that the carriage 12 is restrained more strongly against lateral movement than against longitudinal movement. At the same time the springs 18, 19 oier some resistance to the latter movement.
  • the following apparatus is mounted on the carriage 12.
  • a reel 26 carrying the strip 3 from which the tube 4 is to be formed.
  • a set of three rolls 27 is adapted to receive the strip 3 passing upwards from the reel 26 to straighten it and set its position vertically on the carriage. From the straightening rolls the strip is passed between upper and lower forming rollers 28, 29, the lower 2S of which is grooved so that in its passage between them the strip is bent transversally into a U- shape, as indicated in Figure 3, the lower portion of its section being substantially semi-circular and the two sides extending upwards and outwards from this.
  • the next apparatus carried by the carriage is a pair of guide rollers 30 freely rotatable about vertical axes and adapted to receive the U-shape strip between ⁇ them from the forming rollers 28, 29.
  • the strip 3 then passes through ⁇ a circular die 31 which completes the bending of the strip into the circular form.
  • an arc welding torch 32 in co-operation with a pair of grooved pinching rollers 33, 33 rotatable on vertical axes and adapted ⁇ to hold. the abutting edges of the tube in close contact during welding.
  • the tube 4 passes through'a self-centering guide 34.
  • the insulated conductor is taken from any convenient source (not shown in the drawings) mounted independently of the carriage 12 and is directed into the groove (35 in Figure 2A) formed by the U-shape strip as it passes from the grooving rolls 28, 29 to the guide rolls 30.
  • a set of guides for the core 2 are mounted on an independent ixed support 36 extending upwards between the sides ofthe carriage 12.
  • the guides consist of two freely rotatable horizontal rollers 37, 38, and between them 'a pair of freely rotatable vertical rollers 39.
  • the ⁇ core is adapted to pass over the first horizontal roller 38, between the two vertical rollers 39, 39 and under the second horizontal roller 37.
  • the caterpillar haulage 6 comprises two endless belts 40, 40 each mounted in a ⁇ carriage 41 supported in a frame 42.
  • the carriersI are attached by linkage to a hand wheel 43 whereby they may be moved towards and away from one another for the purpose of threading the leading end of the tube 4 between them.
  • the caterpillars 40 are driven through gearing 44 from the motor 7 mounted on top of the frame 42.
  • the pipe 4 passes into the sinking die 5, being lubricated by means of a suitable lubricating device 45.
  • the pedestal 36 may carry a clamp adapted to co-operate with a suitable projection formed on the carriage and provided with a locking handle.
  • An insulating block 46 attached to a side member 13 of the carriage 12 carries a central contact 47 provided with a terminal 48 for attaching thereto a ilexible load (the load 49 in Figure 6).
  • a ilexible load the load 49 in Figure 6
  • Mounted on the tloor adjacent to this contact 47 are two spaced brackets 50, 51, supporting between them two guide bars 52, 52 extending parallel with the direction of movement of the carriage.
  • the guide bars 52, 52 support a block 53 of substantially rectangular section which is adapted to slide on the bars.
  • An insulating plate 54 iixed to the top of the block 53 supports two spaced brackets 55, 55 carrying two contact blocks 56, 57 provided with suitable terminals 58, 59 for the attachment of flexible leads 60, 61 ( Figure 6).
  • These last mentioned contact blocks 56, and 57 are limit contacts and are disposed one on each side of the contact 47 which is xed to the carriage 12.
  • the central contact 47 is formed with a cylindical surface and the contact surfaces on the limit contacts 56 and 57 are correspondingly recessed.
  • Each bracket 50, 51 also supports an emergency limit switch 62 the operating lever 63 of which is adapted to be engaged by a Vertical end face 64 of the block 53 when this is displaced. towards its limiting position.
  • the emergency limit switches 62, 62 are closed when not engaged by the block.
  • a three-phase supply 65, 66, 67 adapted to be connected to the main motors, of which only the driving motor 9 for the capstan 8 is shown, by means of a main contactor 68.
  • the hold-on coil 69 of this contactor is shown connected in series from one phase 67 through a normally closed stop switch 70, the two series-connected normally-closed limit switches 62, 62 and an auxiliary switch element 71 of the main contactor to another phase 65.
  • the auxiliary switch 71 is short circuited by a connection 72 which includes a normally open pushbutton start switch 73.
  • the reversible gear-control motor 11 for adjusting the speed of the capstan S is connected to the three-phase supply 65, 66, 67 either by a reverse contacter 74 or a forward contactor 75.
  • the forward contactor 75 is operated by a coil 76 connected to the power supply line 65 and to the fixed limit contact 56 which will be engaged by the central contact 47 if the carriage 12 is forced back-wards due to the speed of the capstan 8 being too low.
  • one of the emergency limit switches 62 will be .automatically opened by the movement of the block 53. It will be seen from the circuit diagram that the opening of either of the emergency limit switches 62 will automatically deenergize the hold-on coil 69 of the main contactor 68 so that the whole apparatus will be brought automatically to a standstill.
  • the movement of the tube 4 through the welding position may be obtained by two pairs of grooved driving rollers, engaging the tube before and behind the welding position.
  • the automatic adjustment of speed may be carried out on the rst or second drive, but it is preferred not to interfere with the speed of the tube through the welding position once this has been satisfactorily set. Also the speed adjustment may be effected through a motor-controller.
  • automatic speed co-ordinating means for controlling the relative speeds of the forwarding de vices, said speed co-ordinating means comprising a carriage for one of the 4forwarding devices, suspending members supporting the carriage from fixed supports, centralizing springs incorporated in the suspending members, the springs being adapted to centralize the carriage and the suspending members being adapted to permit displacement of the carriage from the central position in the said line of travel under the action of tension and compression forces set up in the article between the two stages against the centralizing springs, a speed regulator for one of said forwarding devices, and control means for said speed regulator, said control means being adapted for operation by displacement of the carriage to adjust the speed regulator in the sense required to correct the condition which has caused the displacement.
  • automatic speed co-ordinating means for controlling the relative speeds of the forwarding devices, said speed co-ordinating means comprising a carage for one of the forwarding devices, suspending members supporting the carriage from fixed supports, dat plate springs incorporated in the suspending members to centralize the carriage and to permit it to move through a Short distance from a central position in the line of travel under the action of tension and compression forces set-up in the article between the two stages, the said plate springs being in planes transverse to the line of travel, non-flexible connections uniting the plate springs to the suspension members, to the carriage and to the said fixed supports, a speed regulator for one of said forwarding devices, and control means for said speed regulator, said control means being adapted for operation by displacement of the carriage to adjust the speed regulator in the sense required to correct the condition which has caused the displacement.
  • automatic speed co-ordinating means adapted to control the relative speeds of the forwarding devices, said speed co-ordinating means comprising a carriage for one of the forwarding devices, suspending members supporting the carriage from Xed supports, each of said fixed supports comprising a horizontal beam and two uprights together constituting a portal within which the carriage is disposed, each suspending member being a rectangular cross-braced frame with a plate spring rigidly joined to each upper corner of the frame and to the horizontal beam and a plate spring rigidly joined to each lower corner of the frame and to the carriage, the suspending members and springs being adapted to permit displacement of the carriage from a central position in the line of travel under the action of tension and compression forces set up in the article between the two stages, a speed regulator for one of said forwarding devices, and control means for said speed regulator, said control means being adapted for operation by displacement of the carriage to adjust the

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Advancing Webs (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Wire Processing (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
US256946A 1950-12-01 1951-11-17 Arrangements for carrying out continuous processes on long rigid articles Expired - Lifetime US2770867A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29499/50A GB735931A (en) 1950-12-01 1950-12-01 An improved arrangement for carrying out continuous processes on long rigid articles

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US2770867A true US2770867A (en) 1956-11-20

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BE (1) BE507497A (de)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996937A (en) * 1956-04-23 1961-08-22 Cramer Hans Rolling of metal stock
CN114496392A (zh) * 2020-10-23 2022-05-13 江苏亨通光电股份有限公司 用于全干缆的牵引装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US989045A (en) * 1909-06-10 1911-04-11 Eugen Julius Post Apparatus for manufacturing pipes from metal strips.
US1109885A (en) * 1913-03-11 1914-09-08 Bridgeport Brass Co Rolling-mill or similar installation.
US1124761A (en) * 1911-07-12 1915-01-12 Elyria Iron & Steel Company Vise or draft mechanism.
US1892130A (en) * 1930-11-12 1932-12-27 Walter N Seligsberg Constant tension winch, variable load motor control system, and the like
US2162527A (en) * 1935-03-23 1939-06-13 Westinghouse Electric & Mfg Co Tension control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US989045A (en) * 1909-06-10 1911-04-11 Eugen Julius Post Apparatus for manufacturing pipes from metal strips.
US1124761A (en) * 1911-07-12 1915-01-12 Elyria Iron & Steel Company Vise or draft mechanism.
US1109885A (en) * 1913-03-11 1914-09-08 Bridgeport Brass Co Rolling-mill or similar installation.
US1892130A (en) * 1930-11-12 1932-12-27 Walter N Seligsberg Constant tension winch, variable load motor control system, and the like
US2162527A (en) * 1935-03-23 1939-06-13 Westinghouse Electric & Mfg Co Tension control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996937A (en) * 1956-04-23 1961-08-22 Cramer Hans Rolling of metal stock
CN114496392A (zh) * 2020-10-23 2022-05-13 江苏亨通光电股份有限公司 用于全干缆的牵引装置
CN114496392B (zh) * 2020-10-23 2024-05-24 江苏亨通光电股份有限公司 用于全干缆的牵引装置

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BE507497A (de)
GB735931A (en) 1955-08-31

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