US3911708A - Apparatus for straightening long metal workpieces - Google Patents

Apparatus for straightening long metal workpieces Download PDF

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Publication number
US3911708A
US3911708A US477830A US47783074A US3911708A US 3911708 A US3911708 A US 3911708A US 477830 A US477830 A US 477830A US 47783074 A US47783074 A US 47783074A US 3911708 A US3911708 A US 3911708A
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US
United States
Prior art keywords
rolls
length
group
straightening
workpiece
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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US477830A
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English (en)
Inventor
Horst Lorenz
Rolf Eckhard Koch
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.)
TH Kieserling and Albrecht GmbH and Co
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TH Kieserling and Albrecht GmbH and Co
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Filing date
Publication date
Priority claimed from DE19732329345 external-priority patent/DE2329345C3/de
Application filed by TH Kieserling and Albrecht GmbH and Co filed Critical TH Kieserling and Albrecht GmbH and Co
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Publication of US3911708A publication Critical patent/US3911708A/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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/04—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes skew to the path of the work

Definitions

  • ABSTRACT A metal tube straightening machine having several longitudinally spaced groups of rolls with each group comprising a top and bottom rolls. The workpiece is laterally placed into the apparatus between the rolls and axially advanced, between the rolls, only for a distance approximating the distance between two contiguous straightening rolls.
  • a hydraulic pressure responsive arrangement and gearing mechanism is provided to control the movement of the top roll.
  • FIGA A first figure.
  • FIG. 1 A first figure.
  • the invention relates generally to a metal working apparatus and. more particularly, to an apparatus for straightening long metal workpieces, such as rods or tubes, of substantially circular cross section.
  • the apparatus has driven hyperbolic rolls to which the workpieces are fed transverse to the length of the workpiece.
  • the speed at which the tubes are discharged from the stretch-reducing rolling mill is quite substantial.
  • the tubes After being cooled, the tubes are checked for defects by non-destructive test methods, and are then cut into commercial lengths.
  • the lengths of tubing which may be up to 160 m (meter) in length, arriving from the cooling bed, are cut to lengths of between and m.
  • Modern tube or rod cooling beds are designed to pre-straighten the tubes as they pass along the beds.
  • tubes thus straightened are not sufficiently straight to allow sections thereof to be properly tested by nondestructive testing devices.
  • An aspect of the present invention resides in providing a straightening machine for long metal workpieces of substantially circular cross section in which the machine or apparatus utilizes driven hyperbolic rolls.
  • the machine is adapted for the workpieces to be fed at right angles to the length of the workpieces and includes several groups of straightening rolls, with each group constituting a bending triangle or straigntening station and being arranged in a housing, the number and spacing thereof being such that the entire length of the workpiece placed between the straightening rolls, can be clamped by the said straightening rolls, except for a length corresponding approximately to the distance between two contiguous groups of straightening rolls.
  • each top roll of the groups of straightening rolls is connected to a piston rod of a double-acting piston, with the end of the rod remote from the roll passing through the cover of the piston cylinder and being formed with a threaded stub.
  • the external thread on each stub engages the corresponding internal thread of an axially adjustable gearwheel. All of the top rolls can thus be raised and lowered rapidly out of and into their operative positions, in order to place the workpieces between the rolls, or to place them on a roller table after they have been straightened.
  • top rolls are connected to pistons.
  • the top rolls located at the inlet and outlet end are elastically supported in order to make it possible to straighten bars or tubes having a non-circular or out-of-round cross section.
  • the front end of a workpiece introduced laterally from a grid is clamped between the inlet rolls by lowering the top roll. The workpiece is then driven forward and is straightened as it passes through the groups of rolls.
  • the enclosed inlet trough could be replaced by a lead-in device, as shown for example in German Pat. No. 725,630.
  • This device comprises several pairs of hyperbolic rolls, one
  • FIG. 1 is a side elevational view of the straightening apparatus
  • FIG. 2 is a plan view of the apparatus shown in FIG.
  • FIG. 3 is a view generally similar to FIG. 2 but in diagrammatic form showing the feeding, straightening and removing of the workpiece;
  • FIG. 4 is an enlarged elevational view of a group of rolls within a common housing
  • FIG. 5 is a sectional view taken along line ⁇ /V of FIG. 4;
  • FIG. 6 is a sectional view taken along line VI-VI of FIG. 4.
  • FIG. 7 is an elevational view of the feeding device for transverse and axial transportation of the workpieces to be straightened.
  • FIGS. 1 and 4 there are shown a plurality of groups of rolls comprising bottom rolls 1 and 2 and top roll 3 with each group being located in a separate C-shaped housing 4.
  • Each top roll is driven by a motor 6 through a connecting cardan shaft 5.
  • the bottom rolls 1 and 2 are individually, rotatably, supported by a frame 7 and the top rolls are rotatably suspended from a frame 12.
  • Each bottom roll 1,2 is secured to a sleeve 8, see FIG. 5, which in turn is mounted about a threaded shaft 9 which can be rotated clockwise or counter-clockwise by a worm drive 10,11 connecting to the lower end of the shaft 9 for the purpose of suitably adjusting the operating positions of the bottom rolls.
  • All of the worm drives 10,11 and consequently shafts 9 are driven by a motor, not shown.
  • Each frame 12 supporting a top roll 3 is suspended from a piston rod 13 of a doubleacting piston 14, with the end of the rod remote from the roll projecting through the cover of a cylinder 15 and being formed as a threaded stub 16.
  • the external thread of stub 16 engages a corresponding internal thread of an axially adjustable gearwheel 18 disposed in the upper portion of the housing 4.
  • gearwheel 18 The axial adjustment of gearwheel 18 is effected by a pinion 19 engaging the external teeth 20 of gearwheel 18, and by bevel gears 21,22 driven by a motor, not shown, through a shaft 23.
  • the pinion 19 and the bevel gears are mounted on journals 24 in housing 4.
  • the rotation of shaft 23 alters the position of gearwheel 18 in relation to threaded stub 16, whereby the operative po sition of top roll 3 can be adjusted.
  • the rolls are secured in their operative positions as long as a fluid pressure medium passes through bore 25 to a cylinder 26 and acts upon piston 14.
  • oscillating racks 29 are employed, see FIG. 7. After the workpiece has been straightened, the oscillating racks place the workpieces on a roller table provided with a driven roll 30 in each housing 4. A common drive shaft 31 is provided for all of the racks from a motor, not shown.
  • the feed grid 28 holds the workpieces with their longitudinal axis parallel to the length of the straightening apparatus.
  • the tube Upon activation of drives 6 of top rolls 3, the tube is advanced only by an amount corresponding approximately to length b of the pipe, and is thereby straightened.
  • the rolls 3 are then raised again in the manner described above, and the drive to the oscillating racks 29 is switched on.
  • the straightened tube is lifted off bottom rolls 2 and placed on rolls 30 which transport it, for example, to an apparatus, not shown, for non-destructive testing.
  • the apparatus is provided at its ends and between the housings 4 with guide means 33, see FIG. 1.
  • the workpiece thus need be moved axially only over a part of its length of the operating process. Consequently, the elimination of additional forward or axial movement to straighten long tubes has considerably lessened the time element than heretofore possible.
  • the overall length of the straightening apparatus is greater than that of known straightening machines, this is not to be regarded as a disadvantage, since the long troughs for feeding the workpieces and removing them are no longer required.
  • the use of the straightening apparatus according to the above described invention is obviously not restricted to the straightening of long tubes; it may also be employed to straighten long rods, shafts and the like.
  • the number of the straightening rolls and the arrangement thereof relative to each other can be varied to suit conditions. Moreover, only individual rolls or all of the straightening rolls may be driven.
  • An apparatus for straightening long metal work pieces of substantially circular cross-section comprising:
  • each group constituting a bending triangle and being axially spaced from the next adjacent group, the number and spacing of the groups being such that the entire length of the workpiece is clampable by said rolls except for a length corre- .sponding approximately to the distance between two contiguous groups of rolls, the construction and arrangement of the group of rolls being effective to receive the workpiece in a direction transverse to its length, and with each group straightening only a specific length of the workpiece, said length approximating said distance between said two contiguous groups, whereby said length constitutes only a fraction of the total length of the workpiece;
  • each said group of rolls comprises a top roll and two bottom rolls.
  • said drive means includes gearing means controlling the rotational movement of the top roll.
  • said drive means includes a frame connecting to and suspending said top roll, a double acting piston means having a piston rod secured to said frame.
  • each group of rolls is arranged in an individual housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
US477830A 1973-06-08 1974-06-10 Apparatus for straightening long metal workpieces Expired - Lifetime US3911708A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732329345 DE2329345C3 (de) 1973-06-08 Richtanlage für langgestrecktes Richtgut

Publications (1)

Publication Number Publication Date
US3911708A true US3911708A (en) 1975-10-14

Family

ID=5883493

Family Applications (1)

Application Number Title Priority Date Filing Date
US477830A Expired - Lifetime US3911708A (en) 1973-06-08 1974-06-10 Apparatus for straightening long metal workpieces

Country Status (9)

Country Link
US (1) US3911708A (fr)
JP (1) JPS5612206B2 (fr)
CA (1) CA1004068A (fr)
DD (1) DD110775A1 (fr)
FR (1) FR2232375B1 (fr)
GB (1) GB1426116A (fr)
HU (1) HU169560B (fr)
IT (1) IT1014850B (fr)
SU (1) SU603324A3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334420A (en) * 1980-05-06 1982-06-15 Phillips Petroleum Co. Tube guide
EP0555528A1 (fr) * 1992-02-12 1993-08-18 INNSE INNOCENTI ENGINEERING S.p.A. Machine pour redresser des tubes

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5575651U (fr) * 1978-11-17 1980-05-24
JPS5666044A (en) * 1979-11-05 1981-06-04 Toshiba Corp Semiconductor device
JPS57166033A (en) * 1981-04-06 1982-10-13 Toshiba Corp Applying device for resist with adjusting mechanism for quantity of exhaust gas
JPS5950438U (ja) * 1982-09-24 1984-04-03 富士通株式会社 レジスト塗布装置
JPS5962848U (ja) * 1982-10-18 1984-04-25 原口　司郎 連続鋳造用フラツクスボ−ド
JPS5995629U (ja) * 1982-12-20 1984-06-28 株式会社東芝 レジスト塗布装置
JPS6060146U (ja) * 1983-10-03 1985-04-26 原口　司郎 連続鋳造用フラツクスボ−ド
JPS63119236A (ja) * 1987-10-08 1988-05-23 Fujitsu Ltd レジスト塗布方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730158A (en) * 1949-08-25 1956-01-10 Louvroil Montbard Aulnoye Straightening machines with hyperbolic rolls
US3533257A (en) * 1967-06-09 1970-10-13 Redman Tools Holding Ltd Machines for straightening bars or tubes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5122413Y2 (fr) * 1971-06-08 1976-06-10
JPS522894Y2 (fr) * 1971-08-26 1977-01-22

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730158A (en) * 1949-08-25 1956-01-10 Louvroil Montbard Aulnoye Straightening machines with hyperbolic rolls
US3533257A (en) * 1967-06-09 1970-10-13 Redman Tools Holding Ltd Machines for straightening bars or tubes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334420A (en) * 1980-05-06 1982-06-15 Phillips Petroleum Co. Tube guide
EP0555528A1 (fr) * 1992-02-12 1993-08-18 INNSE INNOCENTI ENGINEERING S.p.A. Machine pour redresser des tubes

Also Published As

Publication number Publication date
JPS5612206B2 (fr) 1981-03-19
FR2232375B1 (fr) 1976-12-24
GB1426116A (en) 1976-02-25
SU603324A3 (ru) 1978-04-15
FR2232375A1 (fr) 1975-01-03
DE2329345A1 (de) 1975-05-07
DE2329345B2 (de) 1977-06-30
HU169560B (fr) 1976-12-28
IT1014850B (it) 1977-04-30
CA1004068A (en) 1977-01-25
JPS5032065A (fr) 1975-03-28
DD110775A1 (fr) 1975-01-12

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