EP0712674A1 - Roll forming machine - Google Patents

Roll forming machine Download PDF

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Publication number
EP0712674A1
EP0712674A1 EP95117509A EP95117509A EP0712674A1 EP 0712674 A1 EP0712674 A1 EP 0712674A1 EP 95117509 A EP95117509 A EP 95117509A EP 95117509 A EP95117509 A EP 95117509A EP 0712674 A1 EP0712674 A1 EP 0712674A1
Authority
EP
European Patent Office
Prior art keywords
forming machine
rolls
bush
machine according
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Withdrawn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
EP95117509A
Other languages
German (de)
English (en)
French (fr)
Inventor
Francesco Gasparini
Filippo Gasparini
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.)
GASPARINI SpA
Original Assignee
GASPARINI SpA
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 GASPARINI SpA filed Critical GASPARINI SpA
Publication of EP0712674A1 publication Critical patent/EP0712674A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/22—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal
    • B21B31/26—Adjusting eccentrically-mounted roll bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/18—Adjusting or positioning rolls by moving rolls axially
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/005—Cantilevered roll stands

Definitions

  • the present invention relates to a roll forming machine.
  • Conventional roll forming machines for forming sheet metal commonly have a structure that is constituted by two series of rolls, between which the sheet to be formed is passed.
  • Figure 1 illustrates two forming rolls A and B, each of which is keyed on a corresponding roll supporting shaft C and D.
  • a metal sheet E having a certain thickness is passed between the two rolls A and B and is forced to assume the shape of the passage gap that is indeed defined by the rolls A and B.
  • the above-mentioned passage gap is adjusted by the distance between the roll supporting shafts C and D and by the shapes of the rolls A and B, and its value is determined both according to the shape to be given to the sheet E and according to the thickness of said sheet.
  • the overall compensation required to adjust the gap between the rolls A and B can be split into a direction that is substantially parallel to the axes of the roll supporting shafts D and C, which is termed "axial compensation" herein, and a direction that lies at right angles to said first one and substantially corresponds to the variation of the longitudinal axes of the roll supporting shafts C and D.
  • Figure 2 illustrates the shafts C and D after performing distance compensation between their longitudinal axes
  • figure 3 illustrates how the axial compensation is performed.
  • the axial compensation is greater as the bending angle of the profile approaches 90 sexagesimal degrees.
  • the bending angle due to practical requirements, is substantially never attained with a single bending operation and is instead produced gradually by means of passes between successive forming roll pairs, and therefore the extent of the axial compensation varies from pass to pass.
  • the distance between the longitudinal axes of the roll supporting shafts is currently compensated by means of an actuation screw that moves mutually closer or further apart the supporting blocks inside which said shafts are rotatably coupled.
  • a plurality of actuation screws is commonly installed, optionally connected by transmissions, shafts, joints, etcetera.
  • Axial compensation is currently performed in two different ways: in a first one, the forming rolls are not provided as single blocks but are substantially constituted by mutually adjacent disk-like elements, which can be appropriately added or removed in order to form spacers that indeed produce axial compensation; in a second method, it is possible to axially move the lower or upper mandrel, related to the roll supporting shaft, by virtue of its sliding in a bush that lies inside the support, where the bearing systems of the roll supporting shaft are mounted.
  • the aim of the present invention is to provide a roll forming machine that compensates the distance between the axes of the roll supporting shafts and performs axial compensation simply and practically without mechanical complexity.
  • an object of the present invention is to provide a roll forming machine in which mechanical simplicity is matched by an overall compensation of the sheet metal passage gap that is reliable, fast, and accurate.
  • Another object of the present invention is to provide a roll forming machine in which overall compensation can be automated, since it is necessary to control a limited number of axes.
  • Another object of the present invention is to provide a roll forming machine the cost whereof is significantly lower than the one related to conventional machines.
  • Another object of the present invention is to provide a roll forming machine the operation whereof can be optimized even by personnel that is not assigned specifically to it.
  • Another object of the present invention is to provide a roll forming machine that can be manufactured with conventional technologies and requires limited maintenance and also has an aesthetic appearance, in relation to its constructive simplicity, that is effective and straightforward to understand structurally for the operator.
  • a roll forming machine that comprises at least one pair of motorized forming rolls supported by a frame, the metal sheet to be formed being passed between said rolls, said forming machine being characterized in that at least one first roll of said at least one pair of forming rolls has a respective roll supporting shaft that is rotatably coupled and supported eccentrically within a corresponding cylindrical tubular bush, said bush being in turn rotatably coupled to said frame, a second roll of said at least one pair of forming rolls having a respective roll supporting shaft that is rotatably coupled to said frame, movement means for said bush being provided.
  • a roll forming machine is generally designated by the reference numeral 10.
  • the forming machine 10 comprises, in this case, a first series of rolls 12 and a second series of rolls 13 that are supported by a frame 11.
  • the first series of rolls 12 is located above the second series of rolls 13 and the metal sheet to be formed, not shown in the figures, is passed between them.
  • Each one of the rolls 12 is keyed to the cantilevered end 14 of a corresponding roll supporting shaft 15.
  • a threaded pivot 16 extends axially from the end 14, and a locking element, not shown in the figures, for the corresponding roll 12 is fixed to said pivot once assembly is completed.
  • Each one of the roll supporting shafts 15 is mounted on respective bearing systems 17, and is rotatably coupled and eccentrically supported, by means of said bearing systems, inside a corresponding tubular cylindrical bush 18 that is in turn rotatably coupled to the frame 11.
  • a linkage 19 extends in the upper part of the bush 18 and in this case is substantially monolithic; it has a free end 20 that is shaped so as to form a cavity 21 that engages a corresponding pivot 22 that is in turn fixed to a traction element 23.
  • Each one of the bushes 18 also has an outer surface region 24, related to its opposite end relative to the corresponding roll 12, that is shaped so as to form a thread that couples, upon assembly, to a corresponding thread 25 formed in the internal surface of a case 26 that is fixed to the frame 11.
  • Each one of the rolls 13 is keyed on the cantilevered end 27 of a corresponding roll supporting shaft 28.
  • a threaded pivot 29 extends from the end 27, and a retainer for the corresponding roll 13, not shown in the figures, is fixed on said pivot.
  • Each one of the roll supporting shafts 28 is rotatably supported by bearing systems 30 and, by means of said bearing systems, by bushes 31 that are fixed to the frame 11.
  • operation is as follows: when the gap between the rolls 12 and 13 is to be varied by performing axial compensation and compensation of the distance between the longitudinal axes of the roll supporting shafts 28 and 15, one acts, in this case by means of the traction element 23, on the linkages 19, which turn the corresponding bushes 18.
  • the rotation of the bushes 18 entails substantially two effects: a first one is that the corresponding roll supporting shafts 15 are mounted eccentrically on said bushes, and thus their rotation causes a variation in the distance between the axes of the roll supporting shafts 15 and the axes of the roll supporting shafts 28.
  • a second effect is that their rotation entails mutual screwing or unscrewing between the region 24 and the thread 25, thus causing axial compensation.
  • Axial compensation is in fact performed in practice by the relative motion of two threads, and this allows, in addition to considerable strength, also considerable precision in execution, whereas compensation between the distance of the longitudinal axes of the roll supporting shafts is performed by means of the simple eccentric arrangement of the roll supporting shafts of one of the two series or, in other cases, of both series in the respective bushes.
  • the two compensations are also performed simultaneously, and this significantly reduces the axes to be driven in an optional automatic adjustment.
  • the materials employed, as well as the dimensions, may be any according to the requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
EP95117509A 1994-11-11 1995-11-07 Roll forming machine Withdrawn EP0712674A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD940198 1994-11-11
ITPD940198A IT1269019B (it) 1994-11-11 1994-11-11 Profilatrice a rulli.

Publications (1)

Publication Number Publication Date
EP0712674A1 true EP0712674A1 (en) 1996-05-22

Family

ID=11390837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117509A Withdrawn EP0712674A1 (en) 1994-11-11 1995-11-07 Roll forming machine

Country Status (2)

Country Link
EP (1) EP0712674A1 (it)
IT (1) IT1269019B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102962302A (zh) * 2012-11-20 2013-03-13 浙江一铭机车部件有限公司 衬套自动卷圆机
JP2014176855A (ja) * 2013-03-13 2014-09-25 Aida Engineering Co Ltd ロールスタンド

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3691810A (en) * 1971-05-25 1972-09-19 Tadeusz Sendzimir Individual eccentric control for mill screwdown
US3776014A (en) * 1971-01-27 1973-12-04 Krupp Gmbh Driven rolling assembly with adjustable rolling gap
US3910090A (en) * 1973-05-23 1975-10-07 Kieserling & Albrecht Two-high roll stand with roll adjusting and overload prevention mechanism
GB1559084A (en) * 1975-07-08 1980-01-16 Svenska Rotor Maskiner Ab Rolling mills
US4191042A (en) * 1978-08-03 1980-03-04 Morgan Construction Company Heavy duty axial adjustment mechanism for rolling mill rolls
EP0328645A1 (en) * 1987-08-18 1989-08-23 Nkk Corporation Chockless rolling mill
EP0370995A2 (de) * 1988-11-21 1990-05-30 Peter Lisec Profilwalzmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776014A (en) * 1971-01-27 1973-12-04 Krupp Gmbh Driven rolling assembly with adjustable rolling gap
US3691810A (en) * 1971-05-25 1972-09-19 Tadeusz Sendzimir Individual eccentric control for mill screwdown
US3910090A (en) * 1973-05-23 1975-10-07 Kieserling & Albrecht Two-high roll stand with roll adjusting and overload prevention mechanism
GB1559084A (en) * 1975-07-08 1980-01-16 Svenska Rotor Maskiner Ab Rolling mills
US4191042A (en) * 1978-08-03 1980-03-04 Morgan Construction Company Heavy duty axial adjustment mechanism for rolling mill rolls
EP0328645A1 (en) * 1987-08-18 1989-08-23 Nkk Corporation Chockless rolling mill
EP0370995A2 (de) * 1988-11-21 1990-05-30 Peter Lisec Profilwalzmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102962302A (zh) * 2012-11-20 2013-03-13 浙江一铭机车部件有限公司 衬套自动卷圆机
JP2014176855A (ja) * 2013-03-13 2014-09-25 Aida Engineering Co Ltd ロールスタンド

Also Published As

Publication number Publication date
IT1269019B (it) 1997-03-18
ITPD940198A1 (it) 1996-05-11
ITPD940198A0 (it) 1994-11-11

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