EP0182003A2 - Machine à dresser à rouleaux obliques ayant plus de deux rouleaux à dresser - Google Patents

Machine à dresser à rouleaux obliques ayant plus de deux rouleaux à dresser Download PDF

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Publication number
EP0182003A2
EP0182003A2 EP85108802A EP85108802A EP0182003A2 EP 0182003 A2 EP0182003 A2 EP 0182003A2 EP 85108802 A EP85108802 A EP 85108802A EP 85108802 A EP85108802 A EP 85108802A EP 0182003 A2 EP0182003 A2 EP 0182003A2
Authority
EP
European Patent Office
Prior art keywords
straightening
roller
rollers
bending
roll
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.)
Withdrawn
Application number
EP85108802A
Other languages
German (de)
English (en)
Other versions
EP0182003A3 (fr
Inventor
Ralf Dr. Fangmeier
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
Original Assignee
TH Kieserling and Albrecht GmbH and 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 TH Kieserling and Albrecht GmbH and Co filed Critical TH Kieserling and Albrecht GmbH and Co
Publication of EP0182003A2 publication Critical patent/EP0182003A2/fr
Publication of EP0182003A3 publication Critical patent/EP0182003A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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

  • the invention relates to an inclined roller straightening machine with more than two straightening rollers acc. the preamble of claim 1.
  • Such straighteners are primarily straighteners for round tubes.
  • Tube straightening differs from bar straightening primarily because the permissible forces and surface pressures on the workpiece are smaller during tube straightening. If these forces and surface pressures are exceeded, the pipe bulges or receives permanent markings.
  • the outer straightening rollers which are of fundamental importance for straightening, are referred to as support rollers, the middle roller, which, in cooperation with the support rollers, gives the material to be deflected, as a bending roller.
  • the remaining straightening roles are leadership roles.
  • 10-roll straightening machines which each have a pair of rolls between the straightening roll pairs of the 6-roll straightening machine. With these pairs of rollers, additional straightening is given to the material to be straightened.
  • the two roles opposite the 6-roller leveler Additional pairs of rolls of the 10-roll straightening machine, which influence the bending line of the straightening material, are referred to below as "secondary bending rolls".
  • secondary bending rolls In the case of the inclined roller straightening machines dealt with here, the number of rollers for the invention makes no fundamental difference.
  • 6-roll straightening machines are known, for example, from DE-AS 1 042 350.
  • the disadvantage of this solution is that it ignores the sensitivity to high surface pressures, such as occur when bending over a short length and when ovalizing, for pipes with small wall thickness.
  • Sensitive pipes that is, pipes with a thin wall, will bulge or show signs of running.
  • the invention is based on the object of providing an inclined roller straightening machine for thin-walled tubes which permits strong deflections.
  • this object is achieved by the characterizing features of claim 1.
  • the angular position of the guide channels, as they are formed by the outer pairs of rollers is adapted to the bending line of the straightening material between the support rollers.
  • the surface pressure between the support rollers and the associated guide rollers is reduced because the pipes have a longer contact with the support rollers.
  • a lateral offset of the straightening good on the support rollers is largely avoided by the design inclination of the guideway specified by the rollers.
  • the specified angular range is intended for leveling material with customary dimensions and corresponds to the inclinations of the leveling material sections following the bending zone, based on the straight pass through the inclined roller leveler.
  • the bending force is introduced into a longer section of the straightening material, which on the one hand reduces the surface pressure between the straightening material and the bending roller and on the other hand extends the part of the bending zone in which bends with a plastic deformation component take place. That improves the judging result.
  • the roll holders are preferably designed with a predetermined inclination for the roll axes.
  • provision can be made to make the inclination of the roll holder adjustable.
  • the inlet area of the first straightening roller behind the bending roller on the opposite side of the bending roller is designed as a guide bevel.
  • This guide bevel must appear on the workpiece at the operating angle of the roller. It should preferably be a straight line at the operating angle. But a slope of the slope that is slightly curved under the operating angle also serves the same purpose. In the side view of the guide bevel, there is preferably a concave contour.
  • An inclination angle is preferably provided between the guide channels formed by the outer pairs of rollers and the straight passage of the workpiece.
  • the feature of straightening roll training pursued with claim 8 assumes that the 10-roll straightening machine is operated like a 6-roll straightening machine with two interposed pairs of rolls, each of which provides the straightening good with an additional curvature of the bending line. Based on this, the material to be straightened receives the strongest curvature on the bending roller and a smaller curvature on the two intermediate bending rollers.
  • the dimensioning of the roll lengths claimed here prevents the permissible surface pressure values on the straightening goods from being reached prematurely on a single roll, essentially the bending roll, in the above-described mode of operation and thus achieves an optimal utilization of the straightening ability of the straightening goods in the inclined roll straightening machine.
  • Claim 9 gives a dimensioning rule for the arrangement / design of the support rollers and the guide rollers assigned to them in a 10-roller straightening machine.
  • the feature pursued with claim 10 allows the pulling apart of the support-roller pairs which enables a reduction in the forces required for straightening, because the moments introduced into the straightening material for bending are generated on a longer lever arm.
  • Fig. 1 shows the arrangement and design of the rolls 1 ... 6 of a 6-roll straightening machine for tubular, metal straightening material 7.
  • the rolls 1, 4; 2, 5; 3, 6; are arranged in pairs opposite to each other.
  • the individual pairs of straightening rollers are arranged one behind the other in the direction of travel 8 of the straightening good 7.
  • the straightening rolls 1 ... 6 lie with the longitudinal centers, e.g. 37, 38 of their axes of rotation 10, 11 in one plane, the leveling plane.
  • the straightening rollers have a concave profile.
  • the rollers 1 ... 6 form a guide channel 39 for the straightening material 7 fed axially to the inclined roller straightening machine due to their circumferential profiling and arrangement in pairs (FIG. 4).
  • the guide channels - on the feed side and on the discharge side - close an angle alpha of 0.1 in the bending plane, which corresponds to the plane of the drawing, with respect to the longitudinal center 40 of the straightening good 7, as it would be if the straightening good passed straight through the inclined roller straightening machine ° and 10 °.
  • This angular range corresponds to the angle of inclination of the bending line at the end of the bending zone for straightening goods with currently customary dimensions and strengths.
  • the effective length 19 of the bending roller 5 is at least 30% greater than the effective length 20, 21 of the support rollers 1 and 3, preferably twice as large in the 6-roller straightening machine shown here.
  • the embodiment of the invention shown in FIG. 2 forms the inclination of the guide channel for the straightening good 52 by the fact that the straightening rollers 31, 34; 33, 36 are "drilled” obliquely at the angle alpha.
  • the machine can otherwise remain unchanged from the conventional design, only the outer pairs of straightening rollers are formed with longitudinal ends 11 ... 18 of different sizes.
  • Each of the outer straightening rollers seen in the direction of travel of the straightening material 52, has a "thick” 15 .... 18 and a "thin” longitudinal end 11 .... 14. Within a pair of rollers there are a “thick” and a "thin” longitudinal end at Richtgut 52 opposite. In the same way as the inclination of the entire pair of rollers, this leads to a guide channel for the straightening good 52 which is pivoted by the angle alpha with respect to the straight passage of the straightening good (not shown).
  • the bending rollers 5 and 35 in cooperation with the opposite guide rollers 2 and 32, are only able to not yet between the next straightening rolls 3, 6; 33, 36 found to provide the necessary bend.
  • the leveling material will, without appropriate guide aids, try to slide past the guide channel formed by the pair of rollers on the outlet side.
  • An insertion aid between the "critical" pair of rollers is formed by a guide bevel 22, 23, 51 on the support rollers or secondary bending rollers 3, 33 and 50.
  • the end of the leveling material on the inlet side would run if the leveling material deflection was set too large. This is always the role in the axial direction, that is the working direction of the oblique roller leveler acc. Arrow 8, followed by the bending roller on the opposite side of the material to be straightened.
  • the 10-roll straightening machine shown in FIG. 3 with the straightening rolls 41... 50 differs from the 6-roll straightening machines described above in terms of the invention in that between the existing three pairs of rolls in the 6-roll Straightener two further pairs of rollers 47, 49 and 48, 50 are inserted and give the workpiece additional bends. This is accompanied by a reverse arrangement of the bending roller 45 and the guide roller 42 opposite it on the material to be straightened.
  • the bending roll 45 remains the same Role with the greatest effective length 53.
  • the necessary effective lengths 54 of the secondary bending rollers 49 and 50, as well as the effective lengths 55 of the support rollers 41, 43 decrease.
  • the angles of inclination beta of the guide channels between the feed and discharge-side outer roller pairs 41, 44 and 43, 46 are smaller compared to the straight passage of the straightening material 30 and preferably measure between 0.3 ° and 3 ° the required length differences between the bending roller 45 and the support rollers 41, 43 are close to the upper limits of the ranges specified.
  • the lengths of the secondary bending rollers 49, 50 are preferably between those of the bending roller 45 and the support rollers 41 and 43.
  • the rollers 31, 33, 34, 36 are in the direction of the arrows 60, i.e. displaceable in the direction of throughput of the target material 52. They can be moved away from the bending roller and towards it.
  • the machines currently on the market are horizontal or axial displacement to the target.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
EP85108802A 1984-11-14 1985-07-13 Machine à dresser à rouleaux obliques ayant plus de deux rouleaux à dresser Withdrawn EP0182003A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3441537 1984-11-14
DE19843441537 DE3441537A1 (de) 1984-11-14 1984-11-14 Schraegrollenrichtmaschine mit mehr als 2 richtrollen

Publications (2)

Publication Number Publication Date
EP0182003A2 true EP0182003A2 (fr) 1986-05-28
EP0182003A3 EP0182003A3 (fr) 1987-03-25

Family

ID=6250243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108802A Withdrawn EP0182003A3 (fr) 1984-11-14 1985-07-13 Machine à dresser à rouleaux obliques ayant plus de deux rouleaux à dresser

Country Status (4)

Country Link
EP (1) EP0182003A3 (fr)
JP (1) JPS61119330A (fr)
DE (1) DE3441537A1 (fr)
HU (1) HUT41659A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0431775A2 (fr) * 1989-11-22 1991-06-12 Nkk Corporation Procédé continu de finissage de tubes
US20120304724A1 (en) * 2010-03-29 2012-12-06 Sumitomo Metal Industries, Ltd. Method for straightening tube and straightening roll
CN114263059A (zh) * 2021-12-01 2022-04-01 湖南湘钢金属材料科技有限公司 一种电梯钢丝绳后变形器
EP4015192A3 (fr) * 2020-12-21 2022-09-14 Andrew Turner Appareil et procédé permettant de réduire la courbe dans un rouleau de tuyau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2938110B1 (fr) * 2008-11-06 2013-02-15 Areva Nc Procede de vidage de gaines de combustible nucleaire et machine de broyage par deformation de la gaine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655194A (en) * 1946-10-31 1953-10-13 Einar W Nilsson Apparatus for processing round bars and tubes
DE2902827A1 (de) * 1979-01-23 1980-07-24 Mannesmann Ag Verfahren und vorrichtung zum richten von rohren
US4406141A (en) * 1980-08-21 1983-09-27 Nippon Kokan Kabushiki Kaisha Straightening apparatus for steel pipes and the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655194A (en) * 1946-10-31 1953-10-13 Einar W Nilsson Apparatus for processing round bars and tubes
DE2902827A1 (de) * 1979-01-23 1980-07-24 Mannesmann Ag Verfahren und vorrichtung zum richten von rohren
US4406141A (en) * 1980-08-21 1983-09-27 Nippon Kokan Kabushiki Kaisha Straightening apparatus for steel pipes and the like

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0431775A2 (fr) * 1989-11-22 1991-06-12 Nkk Corporation Procédé continu de finissage de tubes
EP0431775A3 (en) * 1989-11-22 1991-07-10 Nkk Corporation Method of continuous finishing of pipe
US20120304724A1 (en) * 2010-03-29 2012-12-06 Sumitomo Metal Industries, Ltd. Method for straightening tube and straightening roll
EP2554287A1 (fr) * 2010-03-29 2013-02-06 Nippon Steel & Sumitomo Metal Corporation Rouleau de redressage et procédé de redressage de tuyaux
US8783085B2 (en) * 2010-03-29 2014-07-22 Nippon Steel & Sumitomo Metal Corporation Method for straightening tube and straightening roll
EP2554287A4 (fr) * 2010-03-29 2015-04-29 Nippon Steel & Sumitomo Metal Corp Rouleau de redressage et procédé de redressage de tuyaux
EP4015192A3 (fr) * 2020-12-21 2022-09-14 Andrew Turner Appareil et procédé permettant de réduire la courbe dans un rouleau de tuyau
GB2604708B (en) * 2020-12-21 2023-08-02 Turner Andrew An apparatus and method for reducing the curve in a roll of pipe
CN114263059A (zh) * 2021-12-01 2022-04-01 湖南湘钢金属材料科技有限公司 一种电梯钢丝绳后变形器
CN114263059B (zh) * 2021-12-01 2023-03-21 湖南湘钢金属材料科技有限公司 一种电梯钢丝绳后变形器

Also Published As

Publication number Publication date
HUT41659A (en) 1987-05-28
EP0182003A3 (fr) 1987-03-25
DE3441537A1 (de) 1986-05-15
JPS61119330A (ja) 1986-06-06

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Inventor name: FANGMEIER, RALF, DR.