EP0070977A1 - Vorrichtung und Verfahren zum Formen einer äusseren Schutzbewehrung auf einem Schlauch - Google Patents

Vorrichtung und Verfahren zum Formen einer äusseren Schutzbewehrung auf einem Schlauch Download PDF

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Publication number
EP0070977A1
EP0070977A1 EP82103904A EP82103904A EP0070977A1 EP 0070977 A1 EP0070977 A1 EP 0070977A1 EP 82103904 A EP82103904 A EP 82103904A EP 82103904 A EP82103904 A EP 82103904A EP 0070977 A1 EP0070977 A1 EP 0070977A1
Authority
EP
European Patent Office
Prior art keywords
hose
guard
guard member
forming
portions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82103904A
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English (en)
French (fr)
Other versions
EP0070977B1 (de
Inventor
Paul Henry Merritt
Francis William Fuller
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of EP0070977A1 publication Critical patent/EP0070977A1/de
Application granted granted Critical
Publication of EP0070977B1 publication Critical patent/EP0070977B1/de
Expired legal-status Critical Current

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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
    • B21F17/00—Jacketing or reinforcing articles with wire

Definitions

  • This invention relates generally to an apparatus and method for forming an external guard member in situ on a hose and more particularly to an apparatus and method for forming a spring steel wire guard member about the exterior surface of a reinforced hydraulic hose.
  • Guard members for hoses and in particular, coiled wire protectors for high pressure hydraulic hoses, are well known and generally referred to as armored hose or hose having an armor guard.
  • the guard members are particularly useful on hydraulic hoses installed on construction machinery, serving to protect such hoses from cuts, abrasion, and crushing.
  • the guard member is a coiled steel wire or band having an inside diameter larger than the outside diameter of the hose. The guard member thus encircles the hose in a spaced relationship to permit the hose to flex freely within the guard member.
  • Spring steel wire is highly desirable as a material for guard members.
  • the preformed coil was installed over the second end of hose, the second end being the end opposite the assembled end.
  • After installation of the spring steel coil on the hose it was necessary to compress the coil longitudinally along an elongate central axis of the hose, in a direction toward the first or assembled hose end, to expose a length of hose near the second end sufficient for the application of a temporary clamp. After clamping, assembly of the hose was completed by installing a fitting on the second hose end. Finally, the temporary clamp was released and the guard member allowed to expand back to the original uncompressed length.
  • the above method for constructing an armored hose presents a number of problems.
  • an alternate guard member construction is often used.
  • an elongated soft steel strap or band is used for the guard member in lieu of the aforementioned spring steel wire.
  • the soft steel strip can be easily formed in the shape of a coil without the aid of a solid mandrel and can therefore be formed in situ on a hose.
  • An assembled hose that is a hose having fittings installed on both ends, is positioned in an open die, and the soft steel strip is formed in a coil around the hose.
  • easy formability of the soft steel strip material also yields a guard member that may also be easily crushed in use.
  • a guard member that has been crushed or otherwise deformed may restrict the flow capacity of the hose and will generally abraid the hose surface adjacent the crushed zone resulting in premature hose failure.
  • the present invention is directed to overcoming one or more of the problems as set forth above by providing an apparatus and method for forming the preferred spring steel wire guard member in situ on a hose having fittings preassembled on both ends.
  • an apparatus for forming a guard member on a hose includes a frame, a means for supporting the guard member or the hose, or both, a means for feeding a continuous strand of guard material to the apparatus, and a two-piece forming head, at least one part being moveable with respect to the frame.
  • a method for forming an external guard member on a hose includes placing a hose in a two-piece forming head, closing the head about the hose, and feeding a continuous strand of guard material to the forming head.
  • the guard material is initially urged into a first coil shape having a first predetermined diameter and thereafter formed into a second coil shape having a second diameter greater than the first diameter.
  • the present invention solves the problem of forming a spring steel wire member about a resilient member, such as a hose, by providing an apparatus and method for urging a continuous strand of guard material into a first coil shape having a diameter less than the desired final-formed diameter of the guard member.
  • a hose having fittings preassembled on each of the hose ends can be placed between the dies and, after closing of the dies, a spring steel wire guard member may be formed about the hose from one fitting end to the other.
  • An apparatus for forming an external guard member 12 on a hose 14 is generally indicated in Fig. 1 by the reference numeral 10.
  • the apparatus 10 includes a frame 16, a first means 18 for supporting at least one of the guard member 12 or the hose 14, a forming head 20, and a second means 22 for feeding a continuous strand of guard material 24, (Fig. 2) from a supply source such as a play-off reel, not shown, to the apparatus 10 and more particularly to the forming head 20.
  • the apparatus 10 also includes a third means 26 for cutting the strand of guard material 24.
  • the second means 22 for feeding a continuous strand of guard material 24 includes a plurality of driven rollers 28 and a fourth means 30 for equally urging the strand of guard material 24 into pressure contact with each of the rollers 28.
  • the driven rollers 28 are synchronously driven in a normally counterclockwise direction, as viewed in Fig. 3, by a motor 29.
  • the fourth means 30 for equally urging the strand of guard material 24 into pressure contact with the driven rollers 28 includes a plurality of rollers 32 each mounted in a pair of vertically adjustable journals 34 on the frame 16. Each of the rollers 32 are positioned vertically above one of the driven rollers 28 forming a plurality of mating pairs of driven rollers 28 and vertically adjustable rollers 32.
  • each of the journals 34 are attached to a jack screw 36 of a worm gear actuator 38 and driven by a hydraulically powered rotary actuator 40.
  • the rotary actuators 40 are each supplied by a common source of pressurized hydraulic fluid such as a hydraulic pump, not shown, and convert fluid pressure into rotary power in either a clockwise or a counterclockwise direction. When supplied with pressurized fluid from a common manifold, each of the rotary actuators 40 have an equal output torque that is transmitted respectively through the worm gear actuators 38 and the jack screws 36 to the journals 34.
  • Each of the rollers 32, mounted in the journals 34, are thus equally urged, depending upon the preselected power output direction of the rotary actuators 40, either downwardly into pressure contact with the guard material 24 positioned between the respective mating driven roller 28 and the vertically adjustable roller 32, or upwardly away from such contact.
  • the magnitude of the pressure contact between the guard material 24 and the driven rollers 28 is controlled by the pressure of the hydraulic fluid equally directed to each of rotary actuators 40.
  • the second means 22 for feeding a continuous strand of guard material also preferably includes a tension control device 42 and a plurality of straightening rollers 44.
  • the forming means or head 20 includes a first portion 46 removably attached in a fixed position to the frame 26 and a separable second portion 48, moveably mounted on the frame 16.
  • the second portion 48 is moveable between a first position at which the first and second portion 46,48 are spaced apart as shown in Fig. 10 and a second position, shown in Fig. 4, at which the first and second portions 46,48 are in an abutting relationship.
  • a hydraulic cylinder 50 is attached to the frame 16 and has an extensible rod end 52 pivotally connected to a first link 54 of a three member linkage arrangement.
  • the linkage arrangement also includes a second link 56 pivotally attached to a vertical member of the frame 16 and a third link 58 pivotally connected to the second portion 48 of the forming head 20.
  • Retraction of the rod end 52 moves the first link 54 to an elevationally lower position and draws the second portion 48 of the forming head 20 to the left, as viewed in Fig. 10, to the position spaced from the fixed first portion 46.
  • extension of the rod end 52 moves the first link 54 to an elevationally higher position and moves the second portion 48 to the right into the abutting position, as shown in Fig. 4, in pressure contact with the first portion 46.
  • a plurality of cylindrically-shaped die members 60 which as shown in Fig. 5, are alphabetically suffixed with the letters a-h, are rotatably mounted in an arcuately spaced relationship on each of the first and second positions (46,48).
  • the die members are desirably constructed of a carbide steel and, as shown in Fig. 6, each have a pair of parallel annular grooves 62 circumferentially disposed on a peripheral surface 64 of the die member 60.
  • the grooves 62 are contoured to mate with the strand of guard material 24 and are spaced apart a distance "x" equal to the pitch of adjacent coils of the formed guard member 12.
  • the axis 66 is congruent with the longitudinal axis of the formed guard member 12 and is represented in cross-section by the point 66 in Fig. 5.
  • the die members 60a, 60b, and 60c, mounted on the second portion 48, and 60h, mounted on the first portion 46 of the forming head 20, are radially spaced from the longitudinal axis 66 at a second predetermined distance "yl", the second distance "yl”, being greater than the first predetermined distance "y".
  • the groove surface 62 of the die members 60d,60e,60f and 60g are each equally radially positioned at a radius "y" of 20.1 mm (.79 in.) from the axis 66
  • die members 60a,60b,60c and 60h are equally radially positioned at a radius "yl" of 21.6 mm (.85 in.) from the"axis 66.
  • the eight die members, 60a - 60h are also axially spaced along the centrally disposed longitudinal axis 66.
  • the eight die members 60a - 60h are each successively axially spaced, inwardly from the plane of the paper, one-eighth of the aforementioned pitch distance "x".
  • the die member 60b is axially spaced one-eighth of the pitch distance or 0.7 mm (.028 in.) from the die member 60a; die member 60c is axially spaced a distance equal to one eighth of the pitch distance or 0.7 mm (.028 in.) from the die member 60b; and continuing in clockwise direction each of the successive die members 60d - 60h are each progressively spaced a distance equal to one eighth the pitch distance from the respective preceeding die member.
  • the first and second portions 46,48 of the forming head 20 also have a plurality of radially adjustable rollers 68 preferably constructed of a carbide steel material and disposed in contacting relationship adjacent each of the die members 60.
  • the rollers 68 each have a pair of radially extending parallel flanges 70 circumferentially disposed on a peripheral surface 72 of the roller 68, and are mounted on the respective first and second portions 46,48 through an eccentric adjustable bushing 73.
  • the radial position of each of the rollers 68, with respect to each adjacently disposed die member 60, is controlled by rotation of the eccentric bushing 73.
  • a similar radially adjustable eccentric bushing mounting arrangement may be used to mount each of the die members on the respective first and second portions 46,48 of the forming head 20.
  • Such a mounting arrangement allows wider construction tolerances in the fabrication of the forming head and provides a means for readjusting the die members 60 to compensate for wear during use of the apparatus 10.
  • lubricating oil is supplied to the die members 60, and more specifically to the surface of the annular grooves 62, through a pair of oil galleries 74,76 provided respectively in the first and second portions 46,48.
  • the galleries 74,76 communicate a source of pressurized lubricant, not shown, with a hollow center cavity of each of the die members 60.
  • the lubricant is directed to each of the grooved surfaces of the die members 60 by a pair radial apertures 78 communicating between the hollow center cavity and the external surface of the die members 60.
  • the third means 26 for cutting the strand of guard material 24 includes an electrical resistance heated element 80.
  • a TIG (tungsten-inert gas) welding head used without shielding gas, provides a clean, rounded-end smooth cut of the spring steel wire guard material.
  • the element 80 is pivotally mounted on the frame 16 and is moveable, by a rotary actuator 82, between a first position at which the element 80 is spaced from the guard material 24, as shown in Fig. 3, and a second position at which the element 80 is in contact with the guard material 24, as shown in Fig. 10.
  • a clamping member 84 is slideably mounted on the frame 16 and is moveable by a hydraulic cylinder 86 between a first position at which the clamping member 84 is spaced from the formed guard member 12, and a second position at which the clamping member 84 is in pressure contact with the formed guard member 12.
  • the first means 18 for supporting at least one of the guard member 12 and the hose 14 includes a plurality of support stations 88 longitudinally adjustably spaced on the frame 16, along the axis 66, as shown in Fig. 1.
  • each of the support stations 88 have a pair of rotatably mounted idler rollers 90 and a driven roller 92.
  • Each of the idler rollers 90 have a hose support surface 94 and a guard member support surface 96 spaced radially inwardly of the hose support surface 94.
  • the idler rollers are mounted on upwardly extending support arms 98 of a laterally adjustable fixture 100.
  • the support arms 98 are selectively drawn together or spaced apart by rotation of a screw 102 having directionally opposed threads formed at spaced end portions of the screw 102. Rotation of the screw 102 in a first direction draws the pair of idler rollers 90 closer together, and rotation of the screw 102 in a second direction, opposite the first direction, spaces the rollers 90 away from each other.
  • Each of the driven rollers have a guard member support surface 104 and a radially extending flange 106 having a width substantially equal to the space or clearance between adjacent coils of the formed guard member 12.
  • the flange 106 extends radially outwardly a distance sufficient for the flange 106 to be positioned between and frictionally contact adjacently disposed coils of the guard member 12, but not sufficient for contacting the hose 14.
  • the idler rollers 90 therefore support both the hose 14 and the guard member 12 in a properly spaced radial relationship, and the driven rollers 92 rotate only the guard member 12.
  • the driven rollers 92 are driven by a variable speed motor, not shown, synchronously with the driven rollers 28 of the second means 22 for feeding a strand of guard mterial 24 to the forming head 20.
  • a vertically and laterally adjustable roller 108 is disposed above the hose 14 and guard member 12 at each of the support stations 88. The rollers 108 limit the upward movement of the formed guard member 12 and assure engagement of the guard member 12 with the drive flange 106 of the driven rollers 92.
  • Forming an external guard member 12 on a hose 14 is accomplished by first positioning a hose 14, preferably fully assembled with fittings installed on both ends of the hose, in the forming head 20.
  • the apparatus 10 is prepared for this first step by moving the first portion 46 of the forming head 20 to the first, or open position and moving the adjustable rollers 108 on the support stations 88 laterally to a position spaced from vertical alignment midway between the pairs of idler rollers 90.
  • the assembled hose 14 is easily positioned in the apparatus 10 by vertically lowering the hose 14 until it is at rest on the idler rollers 90.
  • the hose 14 is axially aligned, along the axis 66 by positioning one end of the hose 14 immediately to the right of the forming head 20, as shown in Fig. 1.
  • the second portion 48 of the forming head 2'0 is moved to the second, or closed, position in abutting contact with the first portion 46 by pressurizing hydraulic cylinder 50. After movement to the second position, the second portion 48 is maintained in contact with the first portion 46 by maintaining a flow of pressurized fluid to the hydraulic cylinder 50.
  • a continuous strand of guard material 24, such as round, hard drawn spring wire of SAE 1060 steel and having a nominal diameter of 3.0 mm (.12 in.) is fed from a supply reel, not shown, through the tension control device 42, the straightening rollers 44, and the second means 22 to the forming head 20.
  • the strand of guard material 24 is maintained in pressure contact with the plurality of driven rollers 28 of the second means 22 by directing a flow of equally pressurized hydraulic fluid from a common source to preselected ports of the rotary actuators 40.
  • the rotary actuators 40 each provide an output torque of equal magnitude to the respective worm gear actuators 38 and hence to the jack screws 36 connected to the vertically adjustable journals 34 of the rollers 32.
  • rollers 32 are each equally urged downwardly against the strand of guard material 24, urging the guard material 24 into pressure contact with the driven rollers 28.
  • the variable speed motor 24 synchronously drives each of the driven rollers 28 and the strand of guard material 24 is continuously and forceably directed into the forming head 20.
  • the strand of guard material 24 is guided to the second portion 48 of the forming head by a first of the pair of annular grooves 62 formed in the die members 60h and 60a. Initially, to start the actual coil formation, an end of the strand 24 is manually raised and positioned in contact with the first groove 62 in the die member 60b.
  • the drive rollers are then actuated to continue driving the strand of guard material 24 into the forming head 20, and the end of the strand gradually contacts the first groove of die members 60c,60d,60e,60f,60g forming a first complete coil, and then continuing on, passes radially inwardly of the second groove 62 of the die members 60h,60a,60b, and 60c and progressively contacts the second groove 62 of die members 60d,60e,60f, and 60g forming a second complete coil of the guard member 12 before exiting the forming head 20.
  • the strand of guard material 24 is initially urged into a first coil shape having a first predetermined diameter as represented by the section of the first formed coil of guard material 24 extending from die member 60a to die member 60c in Fig. 5.
  • the strand of guard material is thus initially urged into a smaller diameter coil shape than desired for the final coil diameter.
  • the flanges 70 of the radially adjustable rollers 68 are each positioned, prior to use of the apparatus 10, in light contact-with - the respective annular grooves 62 of adjacently positioned die members 60.
  • the light contact between the carbide steel rollers 68 and carbide steel die members 60 serves to remove extraneous material from the forming surfaces of the die members 60, maintain the forming surface in a clean condition, and prolong the useful life of the die members 60.
  • the rollers 68 and die members 60 wear, they may be easily repositioned by rotation of the respective eccentric mounting bushing 73.
  • the formed guard material After exiting the forming head 20, the formed guard material continues to rotate about the hose 14 and advances axially towards the end of the hose opposite the forming head 20.
  • the rotation and advancement of the guard member 20 is aided by frictional engagement of the driven rollers 92 between adjacently formed coils of the guard member 12.
  • the'adjustable rollers 108 are moved laterally and the hose 14, with the complete external guard member 12 formed thereabout is vertically removed from the support stations 88 and the forming head 20.
  • the invention may be summarized as follows:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
EP19820103904 1981-07-30 1982-05-05 Vorrichtung und Verfahren zum Formen einer äusseren Schutzbewehrung auf einem Schlauch Expired EP0070977B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
WOPCT/US81/01025 1981-07-30
PCT/US1981/001025 WO1983000455A1 (en) 1981-07-30 1981-07-30 Method and apparatus for forming a wire guard

Publications (2)

Publication Number Publication Date
EP0070977A1 true EP0070977A1 (de) 1983-02-09
EP0070977B1 EP0070977B1 (de) 1986-03-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820103904 Expired EP0070977B1 (de) 1981-07-30 1982-05-05 Vorrichtung und Verfahren zum Formen einer äusseren Schutzbewehrung auf einem Schlauch

Country Status (5)

Country Link
EP (1) EP0070977B1 (de)
JP (1) JPS58501215A (de)
CA (1) CA1184752A (de)
DE (1) DE3270066D1 (de)
WO (1) WO1983000455A1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110281022B (zh) * 2019-07-03 2020-12-15 长园电子（东莞）有限公司 一种Hose管组件自动生产设备
CN113548432B (zh) * 2021-06-25 2023-03-28 湖南华菱涟源钢铁有限公司 钢卷的运输方法及装置
CN113500412B (zh) * 2021-06-29 2022-08-09 英普锐机械(嘉兴)有限公司 一种太阳能钢边框的生产设备
CN115156916B (zh) * 2022-07-11 2023-11-21 广东海洋大学 一种铣削加工结合电弧加工的装置及其加工方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE45327C (de) * L. ROBERTS und G. CL. SCOFIELD in New-York, 155 Broadway Anwendung des in dem Patent Nr. 44405 behandelten Herstellungsverfahrens von Schraubenfedern zum Armiren von Schläuchen
US630503A (en) * 1898-12-15 1899-08-08 Edwin T Greenfield Method of and mechanism for constructing electric conduits and armoring flexible tubes and electric cables.
US2668615A (en) * 1951-03-23 1954-02-09 Torrington Mfg Co Means for simultaneously feeding two wires
US2722263A (en) * 1951-08-17 1955-11-01 Gen Motors Corp Method of making flexible air hose
US2793672A (en) * 1955-03-18 1957-05-28 Hoover Co Method of close coiling sheathed spring wire
US2845986A (en) * 1954-05-17 1958-08-05 Western Electric Co Machine for automatically coiling stiff wire into a helix

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT983699B (it) * 1972-04-08 1974-11-11 Breco Gmbh U Co Kg Procedimento e dispositivo per la produzione continua di tubi flessi bili e di nastri profilati

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE45327C (de) * L. ROBERTS und G. CL. SCOFIELD in New-York, 155 Broadway Anwendung des in dem Patent Nr. 44405 behandelten Herstellungsverfahrens von Schraubenfedern zum Armiren von Schläuchen
US630503A (en) * 1898-12-15 1899-08-08 Edwin T Greenfield Method of and mechanism for constructing electric conduits and armoring flexible tubes and electric cables.
US2668615A (en) * 1951-03-23 1954-02-09 Torrington Mfg Co Means for simultaneously feeding two wires
US2722263A (en) * 1951-08-17 1955-11-01 Gen Motors Corp Method of making flexible air hose
US2845986A (en) * 1954-05-17 1958-08-05 Western Electric Co Machine for automatically coiling stiff wire into a helix
US2793672A (en) * 1955-03-18 1957-05-28 Hoover Co Method of close coiling sheathed spring wire

Also Published As

Publication number Publication date
DE3270066D1 (en) 1986-04-30
JPH0431811B2 (de) 1992-05-27
CA1184752A (en) 1985-04-02
JPS58501215A (ja) 1983-07-28
WO1983000455A1 (en) 1983-02-17
EP0070977B1 (de) 1986-03-26

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