EP0282680A2 - Cintreuse à rouleaux - Google Patents

Cintreuse à rouleaux Download PDF

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Publication number
EP0282680A2
EP0282680A2 EP87810283A EP87810283A EP0282680A2 EP 0282680 A2 EP0282680 A2 EP 0282680A2 EP 87810283 A EP87810283 A EP 87810283A EP 87810283 A EP87810283 A EP 87810283A EP 0282680 A2 EP0282680 A2 EP 0282680A2
Authority
EP
European Patent Office
Prior art keywords
roller
bearing
line
pressure
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Withdrawn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
EP87810283A
Other languages
German (de)
English (en)
Other versions
EP0282680A3 (fr
Inventor
Simon Schneider
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.)
Chr Haeusler AG
Original Assignee
Chr Haeusler AG
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 Chr Haeusler AG filed Critical Chr Haeusler AG
Publication of EP0282680A2 publication Critical patent/EP0282680A2/fr
Publication of EP0282680A3 publication Critical patent/EP0282680A3/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Withdrawn legal-status Critical Current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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers

Definitions

  • the displaceable rollers In order to achieve a perfect bending result with round bending machines, the displaceable rollers must always be adjustable so that the axes of all rollers acting on the workpiece run exactly parallel to one another so that the lines of contact on which the rollers, i.e. the top roller and the sides or respectively Apply lower forces to the workpiece, run parallel to each other.
  • This asymmetrical bending line which occurs at high working pressures, therefore has its maximum not in the middle between the two ends of the effective roller section, that is to say the thick section which can be used for rolling, but rather closer to the folding bearing than to the fixed bearing.
  • the roller center at the transition of the effective roller section into the short bearing stub is therefore lower than the roller center at the transition of the active section in the longer bearing stub, with the result that the geometric axis of the effective part of the top roller rises slightly from the fixed bearing to the folding bearing.
  • individual bending machines have a symmetrical configuration of the arrangement of the top roller bearings, which, however, has structural disadvantages.
  • the synchronism control of each height-adjustable is now to reduce these inaccuracies, that is to say to reduce the angle between the axes of the rollers which together cause the bending of the workpiece
  • the roller is provided with a correction element which causes the height-adjustable rollers to be inclined in such a manner as a function of the pressure acting on the top roller that the parallelism between the axis of the side rollers or the bottom rollers and the geometric axis of the effective part of the top roller is improved.
  • a four-roll bending machine is shown very schematically, the top roll with 1, the bottom roll with 2 and the side rolls with 3 and 4 are.
  • the upper roller 1 is fixed: it has a short journal 1a on one side, which is journalled in the bearing 11, and on the other side a journal 1b, which is journalled in the hinged bearing 12, and which has an intermediate piece 1c with the working part denoted by 1d the roller 1 is connected.
  • the lower roller 2 shown in FIG. 3 is provided with two bearing pins 2a and 2b, one of which is mounted in the bearing 13 and the other in the bearing 14. These two bearings can each be moved up and down by a hydraulic cylinder 15 or 16, so that the workpiece 17 to be bent can be firmly clamped between the two rollers.
  • Each of the two side rollers 3 and 4 also has a bearing journal mounted in a bearing on each side.
  • the side roller 3 visible in FIG. 4 is provided with the two bearing pins 3a and 3b, which are mounted in bearings 5 and 6, respectively.
  • Each of these two bearings can be moved up and down by means of a hydraulic cylinder 7 or 8, that is to say in the direction of the arrows 10 in FIG. 1.
  • the construction can be designed, for example, as described in the patent specification 604 945.
  • a hydromechanical synchronous system ensures an exact parallel displacement of the roller 3: As can be seen from FIG. 4, this synchronous system has a shaft 9 which is on one side in a fixed bearing 19 and on the other side in the direction of the arrows 10 (Fig. 1) displaceable bearing 20 is mounted.
  • the bearing 20 is connected to the piston 31a of the synchronous valve 31, shown very schematically here, via a correction element, designated as a whole by 30.
  • This synchronous valve 31 has a pressure input line 32 and two pressure Output lines 33 and 34, of which the first via a controllable check valve 35 and a line 37 with the upper pressure chamber 7a of the hydraulic cylinder 7 and the second via a controllable check valve 36 and a line 38 with the upper pressure chamber 8a of the hydraulic cylinder 8 is connected.
  • the lower pressure chambers 7b and 8b of the two hydraulic cylinders 7 and 8 are connected via a line 39 to the control valve 40 in such a way that they can optionally be connected to the pressure line 41 or the return line 42.
  • a signal line 43 also leads from line 39 to each of the two controllable check valves 35 and 36, which are designed such that they are opened when the pressure in control line 43 is greater than the pressure in lines 37 and 38, respectively.
  • the control valve 40 is switched by moving the piston to the right such that the pressure line 41 is connected via the line 44 to the line 32 having a check valve 32a, so that hydraulic fluid through the pressure input line 32, but not through one of the two through the check valves 45a and 46a blocked lines 45 and 46 flow to the synchronous valve 31 and from there to the two pressure chambers 7a and 8a and can cause the lifting of the cylinders 7 and 8.
  • the lower pressure chambers 7b and 8b are emptied into the return line 42 via the common line 39 and the control valve 40.
  • the toothed racks 23 and 24 are also shifted upward, so that the two bearings 19 and 20 mounted shaft 9 rotates.
  • control valve 40 To hold the roller 3 in the position it has reached, the control valve 40 is brought back into the position shown in the drawing. The pressure in the chambers 7a and 7b is then maintained by the check valves 35 and 36.
  • the cylinder of the control valve 40 is shifted to the left, as a result of which the pressure line 41 is connected to the line 39 and the return line 42 is connected to the two output lines 45 and 46 of the synchronous valve 31.
  • the pressure that forms in line 39 opens the two controllable check valves 35 and 36 via signal line 43, so that the upper pressure chambers 7a and 8a can be emptied via lines 37 and 38 and 31, while into the lower chambers 7b and 8b inflowing Hydraulic fluid bearings 5 and 6 are pulled down.
  • the check valve 32a blocks the line 32, so that the hydraulic fluid can reach the line 44 via the outlets 45 or 46 and the return line 42 via the control valve 40.
  • the synchronous valve 31 works in such a way that the roller controlled by the valve shifts in parallel.
  • any other synchronous device can of course also be used for the machine according to the invention.
  • the deflection line of the upper roller 1 which practically coincides with its geometrical axis 1e, assumes the shape shown in FIG. 3, the deflection being greatly exaggerated in the drawing for the sake of clarity.
  • this bending line does not have its maximum in the middle of its effective part, i.e. the section between the two ends 1f and 1g of the roller section 1d, i.e. the thick section intended for resting on the workpiece, but at the point designated 1h , which is somewhat closer to the folding bearing 12 than to the fixed bearing 11.
  • roller axis 1e at the end of the effective roller part adjacent to the fixed bearing 11 is raised only immeasurably, but at the end facing the folding bearing 12 by a measurable piece, designated by x here, which can easily be a few mm.
  • the side roller 3 should be as parallel as possible to the effective part of the top roller 1, that is to say the two points A and B on the bending line 1e at the beginning and at the end of the effective part of the top roller connecting line.
  • the bearing 6 adjacent to the folding bearing 12 has to be raised somewhat more than the other bearing 5 of the side roller 3.
  • the correction member 30 which has a cylinder 30a and one which can be displaced therein against the force of a spring 30b , With a piston rod 30d provided piston 30c, this correction member 30 being arranged between the piston rod 31c of the synchronous valve and the bearing 20 of the shaft 9.
  • the free end of the piston rod 30d thus supports the bearing 20, while the bottom of the cylinder 30a is firmly connected to the piston rod 31a.
  • the end of the cylinder 30a facing away from the spring 30b is connected by a pressure transmission line 49 to the pressure line 48, via which the lower roller 2 receives its contact pressure.
  • the absc issa not being the force K but the pressure proportional to it being entered in the pressure line.
  • p o corresponds to the preload of the spring 30b, which can also be “zero”
  • the spring hardness is a measure of the steepness of the straight line.
  • the angle ⁇ m is an angle of the order of magnitude of 1/2 to 1 1/2 °, that is to say the displacement element to be caused by the correction element 30 is one that is significantly smaller than that shown in the drawing for reasons of clarity, where the permissible displacement of the piston 30c in the cylinder 30a is shown correspondingly large.
  • This piston 30 is shown in the position in which it is as long as the pressure p is not yet greater than p o , that is to say in the position in which the correction element has not yet exerted its effect.
  • the machine according to the invention can also be a three-roll machine: in this case, one of the two “side rolls” acts as a lower roll and the other but as an actual side roller, so that with the pressure acting on the roller working as the lower roller, the correction element for controlling the roller serving as the actual side roller, that is to say as a bending roller, is controlled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP87810283A 1987-03-16 1987-05-05 Cintreuse à rouleaux Withdrawn EP0282680A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH983/87 1987-03-16
CH98387 1987-03-16

Publications (2)

Publication Number Publication Date
EP0282680A2 true EP0282680A2 (fr) 1988-09-21
EP0282680A3 EP0282680A3 (fr) 1990-03-21

Family

ID=4199745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87810283A Withdrawn EP0282680A3 (fr) 1987-03-16 1987-05-05 Cintreuse à rouleaux

Country Status (1)

Country Link
EP (1) EP0282680A3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100346894C (zh) * 2005-11-10 2007-11-07 上海交通大学 汽车尾气三元净化器生产线四辊自动卷筒机构
CN101912904A (zh) * 2010-08-19 2010-12-15 中国航空工业第六一八研究所 可调节带材滚弯机
CN112091015A (zh) * 2020-11-23 2020-12-18 机械科学研究总院江苏分院有限公司 双驱气动两辊卷圆机及其工作方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE238610C (fr) * 1910-01-25 1911-09-27
FR745457A (fr) * 1933-05-10
GB1099191A (en) * 1963-12-19 1968-01-17 Scottish Machine Tool Corp Ltd Improvements in or relating to plate bending machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR745457A (fr) * 1933-05-10
DE238610C (fr) * 1910-01-25 1911-09-27
GB1099191A (en) * 1963-12-19 1968-01-17 Scottish Machine Tool Corp Ltd Improvements in or relating to plate bending machines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100346894C (zh) * 2005-11-10 2007-11-07 上海交通大学 汽车尾气三元净化器生产线四辊自动卷筒机构
CN101912904A (zh) * 2010-08-19 2010-12-15 中国航空工业第六一八研究所 可调节带材滚弯机
CN101912904B (zh) * 2010-08-19 2012-05-23 中国航空工业第六一八研究所 可调节带材滚弯机
CN112091015A (zh) * 2020-11-23 2020-12-18 机械科学研究总院江苏分院有限公司 双驱气动两辊卷圆机及其工作方法
CN112091015B (zh) * 2020-11-23 2021-01-26 机械科学研究总院江苏分院有限公司 双驱气动两辊卷圆机及其工作方法

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Publication number Publication date
EP0282680A3 (fr) 1990-03-21

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