US3864952A - Apparatus for forming spiral steel pipe - Google Patents

Apparatus for forming spiral steel pipe Download PDF

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Publication number
US3864952A
US3864952A US310082A US31008272A US3864952A US 3864952 A US3864952 A US 3864952A US 310082 A US310082 A US 310082A US 31008272 A US31008272 A US 31008272A US 3864952 A US3864952 A US 3864952A
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US
United States
Prior art keywords
truck
roll supporting
base
mandrel
stands
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
Application number
US310082A
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English (en)
Inventor
Akira Matsufuji
Kenji Numajiri
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Individual
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Individual
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Filing date
Publication date
Priority claimed from JP9651471A external-priority patent/JPS5110590B2/ja
Priority claimed from JP8530072U external-priority patent/JPS5114041Y2/ja
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3864952A publication Critical patent/US3864952A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
    • B21C37/12—Making tubes or metal hoses with helically arranged seams

Definitions

  • ABSTRACT An improved apparatus for forming spiral steel pipe by pressing a steel strip against exterior forming rolls by mandrel rolls so as to bend the steel strip spirally.
  • a freely movable truck has the exterior forming roll supporting stands fixedly mounted on the upper surface thereof, and is movably mounted on rails on the base of the apparatus.
  • the rails having raisable and lowerable portions at the positions where the truck is supported thereon when the exterior forming rolls are at their operative positions on the apparatus.
  • Clamps along the base are engageable with the truck for fixing the truck at a predetermined position on the base, and supporting frame means is provided adjacent the rails for removably supporting the mandrel roll supporting ations.
  • the present invention relates to an apparatus for forming spiral steel pipe, more particularly to such a device for replacing the forming roll supporting stands having the outer surface forming rolls and inner surface forming rolls thereon with accuracy in a desired position and in a short time, and also to a screw down device for the apparatus.
  • the screw down device for the conventional type of the apparatus for forming spiral steel pipe which is driven through a screw 24 and a nut 25 as shown in FIG. 5, or by using a cotter or the like, is so constructed as to apply a forming force to the mandrel roll stand 22 through the two screw down rods 26 and 27, and have it balanced at the balancing point in the vicinity of its center by the balance rod 28 which is always exerting a pulling force by means of an oil pressure cylinder (not shown in the drawings) or a spring.
  • This method has an advantage that such pretreatment devices for the steel sheet as side trimmer can remain fixed.
  • the operation of the device with the forming point L as shown in FIG. 5 tends to cause a great dislocation of the screw down position from the forming position, producing deformation due to the forming force'on the mandrel roll forming stand.
  • the present invention provides an apparatus for forming spiral steel pipe which has a mandrel roll stand and the outer surface forming roll stand which are both adjustable and replaceable with great ease and in a very short time.
  • Another object of the present invention is to provide an apparatus for forming spiral steel pipe which is equipped with a mandrel roll stand and an outer surface forming roll stand both of which are adjustable and replaceable with high accuracy in set positions during reinstallment.
  • Another object of the present invention is to provide an apparatus for forming spiral steel pipe from a variety of steel sheets, with extremely little deformation of the so formed pipe caused by the forming force of the mandrel roll stand.
  • FIG. 1 is a plan of an apparatus for-forming spiral steel pipe acccording to the present invention.
  • FIG. la is a partial plan view ofa portion of the apparatus positioned above the apparatus as shown in FIG. 1.
  • FIG. 2 is a side view of the apparatus shown in FIG. I.
  • FIG. 3 is a sectional view taken on line III III of FIG. 2.
  • FIG. 4 is a front view of the apparatus shown in FIG. 1.
  • FIG. 5 is a side view of an apparatus according to the prior art for forming spiral steel pipe showing the screw down device for the inner surface forming roll stand.
  • FIG. 6. is a side view of the screw down device for the inner surface forming roll stand according to the present invention.
  • FIG/7 is a sectional view of the screw down device shown in FIG. 6 along the line Vll VII.
  • the exterior forming roll stands 20 have a great number of parallel exterior forming rolls 21 freely rotatably mounted on the upper surface of said stands 20, spaced along the long direction of said stands 20, with the axis of each of said rolls 20 being oblique to the long direction of said stands 20.
  • One series of mandrel rolls 23 is placed right over two series of exterior forming rolls 21 in a pyramid-like arrangement when viewed sectionally, as seen in FIGS. 3 and 4.
  • Steel strip S is then fed between the two kinds of rolls, that is between the exterior forming rolls 21 and the mandrel rolls 23, obliquely to the long direction of both stands, that is, the exterior forming stand 20 and the interior forming stand 22, in a direction along these rolls 21 and 23.
  • the steel strip S is then pressed against the exterior forming rolls on stands 20 by the mandrel rolls on stand 22 which is forced down by a screw down device (not illustrated), the strip thus being bent so as to form pipe P, shown in phantom lines.
  • An outer surface forming roll supporting stand 20 having the outer surface forming rolls 21 thereon, is fixed, by means of bolts, wedge grips, etc., on the upper surface of a truck 2 for the transportation of the main part of the forming apparatus of the present invention (hereafter called the truck"), said truck 2 being freely movable on rails and 6, which are laid in the long direction of the base 1 of the forming apparatus.
  • the base 1 of the apparatus is a stand for setting said truck 2 at the position right for the operation of the apparatus.
  • Said rails 5 and 6 for the movement of said truck 2 may be the normal type, so far as they are effective for the prevention of side-swinging and derailing.
  • one of said rails 6 has a flat head, and the other has the head shaped like an inverted letter V.
  • Clamps 7 are provided according to the requirement at appropriate positions on both sides of the base 1 for the fixation of said truck 2 to the base 1. They need not be a particular kind, but in this embodiment, each clamp consists of a cylinder 9 for setting into operation and releasing arms 8 holding the truck 2 and another cylinder 10 for moving the arms 8 up and down, so as to fix the truck 2 on the base 1, as shown in FIG. 4.
  • raisable and lowerable rail portions 11 and 12 make up parts of said rails 5 and 6 within the base 1, on which portions guiding wheels 3 and 4 on the truck 2 are positioned when the truck 2 stops against stops 15.
  • the raisable and lowerable rail portions 11 and 12 are moved up and down by means of fluid pressure cylinders 13 and 14, so that when they move, they can be brought level with said rails 5 and 6; therefore, their heads are respectively the same in shape as those of said rails 5 and 6.
  • Stops 15 provided at one end of the base 1 position said truck 2 at the right position on the base 1.
  • a truck pushing device is provided which consists of a pushing arm 17 with one end pivoted for free rotation on the stand and of a pushing cylinder 18 for pressing said pushing arm 17 in the vicinity of its center; said device 16 is provided at the end of the base 1 opposite to the position of the stops 15, for the adjustment of the location of said truck 2 in the long direction of the apparatus then the truck 2 is placed on the base 1.
  • the truck pushing device 16 may function as a clamp, in addition to pushing of the truck 2.
  • the mandrel roll stand 22 is releasably supported on the holding frames 19 through housing 29 by a supporting frame 22, which in turn is releasably clamped to the upright holding frames 19 by pivotable clamp member 19 mounted on the holding frames 19.
  • the replacement of forming stands is so carried out that in the first place, the mandrel roll supporting stand 22 is released from the holding frames 19, and is placed on the outer surface forming roll supporting stand 20, and then all the clamps 7 are released and the rail portions 11 and 12 are moved up respectively by the cylinders 13 and 14 until they are level with said rails 5 and 6 for connection therewith.
  • said truck 2 moves up on its guiding wheels 3 and 4 to the level of the rails 5 and 6. In other words, said truck 2 is so placed as to run on the rails 5 and 6.
  • the truck 2 is rolled off the base 1. Then. the truck 2 may be replaced by another truck 2 already having an outer surface forming roll supporting stand 20 and a mandrel roll supporting stand 22, or it may have another outer surface forming roll supporting stand 20 and another mandrel roll supporting stand 22 mounted thereon and moved back onto the base 1 by the trailer (not shown in the drawings), whichever is convenient.
  • the position of the truck 2 in the long direction of the apparatus when the truck 2 is lowered onto the base 1, is adjusted by pushing the truck 2 against the stops 15 again and again by means of the truck pushing device 16. After that, the truck 2 is fixed on the base 1 with the clamps 7.
  • the mandrel roller supporting stand 22 is disconnected from the temporary connection with the outer surface forming roll supporting stand 20, and is fixed to the holding frames 19 at the proper position.
  • FIG. 6 one embodiment of the screw down device for the mandrel roller supporting stand according to the present invention is shown.
  • a balance rod 28 extends downwardly from above toward the vicinity of the central part of the stand 22, and the lower end is connected to said central part of the stand 22 and the top is connected with a liquid pressure cylinder or spring (not illustrated).
  • the stand 22 receives upward force produced by said liquid pressure cylinder or spring and transmitted through said balance rod 28, so as to balance said stand 22 against a downward screw down force.
  • Housing 29 is releasably mounted on said supporting frames 19 and on housing 29 are mounted said downward screw down force producing means and said liquid pressure cylinder or spring.
  • Screw down rods 26 and 27 supply forming force to the stand 22, both of which are set by a screw 24, and are rotated by the driving force supplied from a power source (not shown) through nuts 25 attached to the housing 29, releasably mounted on supporting frames 19, generating the forming force.
  • a screw down device using a cotter instead of a screw is also useful for this purpose.
  • the abovementioned two screw down rods 26 and 27 are connected to each other by a screw down connection beam 30; and one of the rods 26 and 27 the screw down rod 26 placed in the vicinity of the end of the stand 22 has an end piece 31 freely movable along the screw down connection beam 30 toward the screw down rod 27, say, as far as the position 32 shown in the drawing.
  • the movable connection means between the end piece 31 of the screw down rod and the screw down connection beam 30 and between the end piece 31 of the screw down rod and the forming stand 22, are the form of dovetail grooves as shown in FIG. 7. But such means are not limited to this construction.
  • Set screws 33 and 34 are provided for fixing the end piece 31 to the stand 22 at the right positions. The movement of the end piece 31 of the screw down rod 26 depending on the width of the steel sheets S may be made automatically or manually, whichever is convenient.
  • the mandrel rolls being mounted on a mandrel roll supporting stand and the exterior forming rolls being mounted on exterior forming roll supporting stands, the mandrel roll supporting stand being above the exterior forming roll supporting stands
  • the improvement comprising a freely movable truck having said exterior forming roll supporting stands fixedly mounted on the upper surface thereof, rails on the base ofthe apparatus on which said truck is movably mounted, said rails having raisable and lowerable portions at the positions where said truck is supported thereon when said exterior forming rolls are at their operative positions on the apparatus, clamps along said base engageable with said truck for fixing said truck at a predetermined position on the base, and supporting frame means adjacent said rails for releasably supporting said mandrel roll supporting stand at its operative position above said exterior forming roll supporting stands, whereby with the exterior forming roll supporting stand resting on said truck, said rail portions can be
  • clamps each comprise a clamp member mounted on said base for movement up and down relative to said truck, first fluid pressure piston-cylinder means coupled to said clamp member for moving said clamp up and down and a second fluid pressure piston-cylinder means coupled to said clamp for urging said clamp member toward said truck for tightly engaging said clamp member with said truck.
  • a screw down connection for mounting said mandrel roll supporting stand, said screw down connection comprising a pair of screw down rods spaced along the length of the mandrel roll supporting stand and a connecting beam extending between said screw down rods, one of said screw down rods having at least a portion thereof movably connected to said connecting beam for movement along said beam toward the other screw down rod.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US310082A 1971-11-29 1972-11-28 Apparatus for forming spiral steel pipe Expired - Lifetime US3864952A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9651471A JPS5110590B2 (enrdf_load_stackoverflow) 1971-11-29 1971-11-29
JP8530072U JPS5114041Y2 (enrdf_load_stackoverflow) 1972-07-18 1972-07-18

Publications (1)

Publication Number Publication Date
US3864952A true US3864952A (en) 1975-02-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
US310082A Expired - Lifetime US3864952A (en) 1971-11-29 1972-11-28 Apparatus for forming spiral steel pipe

Country Status (6)

Country Link
US (1) US3864952A (enrdf_load_stackoverflow)
CA (1) CA977216A (enrdf_load_stackoverflow)
DE (1) DE2258198C3 (enrdf_load_stackoverflow)
FR (1) FR2162049B1 (enrdf_load_stackoverflow)
GB (1) GB1388206A (enrdf_load_stackoverflow)
IT (1) IT971319B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210086384A1 (en) * 2019-09-23 2021-03-25 Horace Thompson Helicoidal blade manufacturing system and method
CN115722594A (zh) * 2022-11-17 2023-03-03 重庆海亮铜业有限公司 一种内螺纹铜管成型用自润滑芯杆

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112718982B (zh) * 2020-12-24 2023-05-02 诸暨市金戋机械有限公司 一种换热器加工用的折弯装置及换热器的折弯方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675773A (en) * 1954-04-20 Apparatus for making tapered flexible tubing
US2913946A (en) * 1956-08-22 1959-11-24 Philco Corp Die handling mechanism for facilitating insertion and removal thereof in presses
US2988234A (en) * 1959-03-18 1961-06-13 Western Electric Co Two-position work-feeding apparatus
US2996025A (en) * 1956-08-16 1961-08-15 Danly Mach Specialties Inc Readily changeable die assembly for power presses
US3146331A (en) * 1961-10-18 1964-08-25 Hoesch Ag Apparatus for producing helical-seam pipe
US3207065A (en) * 1963-12-06 1965-09-21 Danly Mach Specialties Inc Quick die changing mechanism
US3212430A (en) * 1963-08-30 1965-10-19 Minster Machine Co Sliding bolster press
US3407639A (en) * 1964-10-31 1968-10-29 Kehne Lothar Device and method for forming helical tubing
US3427854A (en) * 1967-03-28 1969-02-18 Bliss Co Movable bolster for presses
US3650015A (en) * 1969-02-04 1972-03-21 Pacific Roller Die Co Inc Helical pipe making method

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675773A (en) * 1954-04-20 Apparatus for making tapered flexible tubing
US2996025A (en) * 1956-08-16 1961-08-15 Danly Mach Specialties Inc Readily changeable die assembly for power presses
US2913946A (en) * 1956-08-22 1959-11-24 Philco Corp Die handling mechanism for facilitating insertion and removal thereof in presses
US2988234A (en) * 1959-03-18 1961-06-13 Western Electric Co Two-position work-feeding apparatus
US3146331A (en) * 1961-10-18 1964-08-25 Hoesch Ag Apparatus for producing helical-seam pipe
US3212430A (en) * 1963-08-30 1965-10-19 Minster Machine Co Sliding bolster press
US3207065A (en) * 1963-12-06 1965-09-21 Danly Mach Specialties Inc Quick die changing mechanism
US3407639A (en) * 1964-10-31 1968-10-29 Kehne Lothar Device and method for forming helical tubing
US3427854A (en) * 1967-03-28 1969-02-18 Bliss Co Movable bolster for presses
US3650015A (en) * 1969-02-04 1972-03-21 Pacific Roller Die Co Inc Helical pipe making method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210086384A1 (en) * 2019-09-23 2021-03-25 Horace Thompson Helicoidal blade manufacturing system and method
US11701699B2 (en) * 2019-09-23 2023-07-18 Horace Thompson Helicoidal blade manufacturing system and method
CN115722594A (zh) * 2022-11-17 2023-03-03 重庆海亮铜业有限公司 一种内螺纹铜管成型用自润滑芯杆

Also Published As

Publication number Publication date
FR2162049B1 (enrdf_load_stackoverflow) 1975-11-07
CA977216A (en) 1975-11-04
GB1388206A (en) 1975-03-26
DE2258198B2 (de) 1974-08-01
DE2258198C3 (de) 1975-03-13
DE2258198A1 (de) 1973-06-07
IT971319B (it) 1974-04-30
FR2162049A1 (enrdf_load_stackoverflow) 1973-07-13

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