EP1214993A2 - Improvements for joining metal parts - Google Patents

Improvements for joining metal parts Download PDF

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Publication number
EP1214993A2
EP1214993A2 EP20010500285 EP01500285A EP1214993A2 EP 1214993 A2 EP1214993 A2 EP 1214993A2 EP 20010500285 EP20010500285 EP 20010500285 EP 01500285 A EP01500285 A EP 01500285A EP 1214993 A2 EP1214993 A2 EP 1214993A2
Authority
EP
European Patent Office
Prior art keywords
flanging
tool
metal parts
retractile
joining metal
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Withdrawn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
EP20010500285
Other languages
German (de)
English (en)
French (fr)
Inventor
Victor Maria Pico Burgos
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.)
Ingemat SL
Original Assignee
Ingemat SL
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 Ingemat SL filed Critical Ingemat SL
Publication of EP1214993A2 publication Critical patent/EP1214993A2/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Withdrawn legal-status Critical Current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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
    • B21D39/021—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors

Definitions

  • the present invention as expressed in the title of this specification, consists of improvements introduced in devices for joining metal parts by means of a system of flanging on a movable table, through which significant advantageous features are achieved in comparison with those existing at the present time and both in the structure as well as in the functionality of the mechanism.
  • the flanging operation is understood as the operation of the folding of the contour flange of an exterior plate or panel with respect to the edge of another interior plate or panel, with a plastic mechanical deformation taking place so as to establish the joining of both plates along all or part of their perimeter.
  • This folding is carried out in two successive operations: one pre-flanging (first operation) which folds said flange from a predetermined initial position to an intermediate position; and a another final flanging (second operation) in which said flange is completely bent backwards on the edge of the interior plate.
  • first operation pre-flanging
  • second operation final flanging
  • An object of the invention is to achieve that the flanging phases or operations, performed with the relevant tools arranged in a toolholder head, are carried out consecutively and in a simpler manner, thus avoiding the tilting of the head between the two operations or phases.
  • Another object of the invention is that the raising and lowering of the flanging tools be obtained by means of an electric servo-controlled drive, which makes it possible to obtain a control of the speeds as well as a control of the position of the head dispensing with the need for positioning cams, wiring, box of microswitches, etc.
  • the flanging systems used at the present time are of two types: flanging in a press and flanging on a movable table.
  • the flanging system in a press is performed by means of a die that has catch fingers which, when activated, achieve the folding of the flange.
  • This flanging system requires the installation of a press on civil work, and in addition, the maintenance of the equipment is very complex. Moreover, this system is costly and it is difficult to control the thickness of the package formed following the flanging, while it is only possible to act on the enveloping flange from a single direction.
  • the other type of flanging that is, by using the movable table system, is based on the system where the flanging units are placed in a working position and await the arrival of the parts to be flanged, arranged on the cradle, reaching the working position by means of a vertical drive system.
  • This flanging system also presents certain drawbacks such as the fact that the place where the parts are loaded and unloaded is situated at a considerable height, which limits the possibilities of certain loading and unloading systems.
  • the cost of the hydraulic drive is generally very high and it requires a high consumption of energy, with the weight of the machine also being considerable.
  • the stresses produced in the flanging operation cause the flanging units to tend to slip out of their working position.
  • the maintenance of the hydraulic cylinder that moves the cradle is complicated on account of the difficulty of accessing it from the outside. This system is also capable of acting on the flange from one direction only.
  • the same firm applying for this invention developed a modular table system for joining metal parts by flanging, which is the object of the Spanish patent no. P-9601677, where the exterior plate or panel is supported and fixed on a cradle, the support surface of which reproduces the shape of the exterior panel.
  • the flanging operation commences by means of the combination of movements of the said flanging unit and takes place in two successive phases. In the first phase, an initial folding of the flange is performed, called pre-flanging, and afterwards the flange of the exterior panel is closed on the interior panel in an operation called final flanging.
  • a preferably mechano-welded structure is considered on which a table is placed comprised by a thick plate with fastening means by other additional elements such as centring devices suitable for securing the placement of the cradle at coordinates, the fastening means of the cradle itself, as well as supports of the flanging units, of the holding-down element and of the centring devices supports in order to situate the said holding-down element properly.
  • the table has two mechanical stops for the flanging operation: one for the pre-flanging phase and the other for the final flanging phase. These mechanical stops act as landing dogs of the carriages of the flanging units, thus ensuring that the travel ends always at the same point and position in order to achieve the quality required and that the thickness of the package comprised by the exterior panel, the interior panel and the flanges of the exterior panel which returns and refolds over the interior panel is always repeated in a consistent manner.
  • flanging units contemplated in this aforementioned patent are interchangeable modular movable elements, the drive of which is comprised by hydraulic cylinders, one for producing a tilting movement in order that the approach will take place and the subsequent withdrawal of the flanging unit to the working zone, and a second hydraulic cylinder suitable for performing the movements of execution of the two successive operations of pre-flanging and final flanging.
  • Each flanging unit is comprised by a part linked to the table, or tilting part, made up by a set of supports of the tilting shaft, with fastening means for the cutter-holder carriage, with the movement being transmitted from the first cylinder by means of connecting rods.
  • the mechanical stops provided for the different flanging units which are located at the points selected on the contour of the table, in order for the pre-flanging and final flanging operations to be performed correctly, are built preferably by means of a steel dolly.
  • the sliding means for the action of the cutters are built preferably by means of symmetrical tempered and rectified steel strips, which have means for fastening to the sliding part of the flanging unit.
  • the flanging means located on the sliding part of the machine are comprised preferably of a cutter-holder with housing means and fixation of the pre-flanging cutters or tools and of the final flanging cutters or tools, with the cutters being of a shape in accordance with the shape and contour of the final part. These cutters are supplemented, for the zones of the contour corners of the part, with inserts appropriate for being joined to the adjacent cutters.
  • the upward-downward movement of the sliding part of the flanging unit is carried out by means of a geared motor by transformation of the rotating movement of its shaft, into a linear movement of a ball spindle rigidly joined in an axial direction to the sliding part of the flanging unit, which passes through its relevant ball nut, elastically joined to the tilting part.
  • a simple system of pulleys and a cog belt the transmission of the turning motion to the spindle is achieved.
  • the ball spindle will be forced to make an ascending or a descending movement on sliding through the ball nut and thus the raising or the lowering of the cutters or tools anchored to the sliding part of the flanging unit will take place, as we had indicated earlier.
  • the tilting movement of the flanging unit is achieved by means of the action of a pneumatic cylinder that moves a system of connecting rods linked to the flanging unit.
  • Both cutters are fixed to a single cutter-holder, with the final flanging cutter being arranged on the top part of the cutter-holder, while the pre-flanging cutter is located on the lower part; this arrangement is the reverse of that contemplated in the primary patent, which determined that another auxiliary final flanging cutter would also be necessary which was located in a position prior to the final flanging cutter and on the same cutter-holder as the latter.
  • the improvements introduced in devices for joining metal parts by means of a system of flanging on a movable table which constitutes the object of this invention consist of providing that the drive motor for raising and lowering the flanging tools becomes servo-controlled, with the advantage of controlling speeds and position of the head dispensing with positioning cams, etc.
  • a further basic improvement of the invention consists of improving the arrangement or the flanging tools which change from being integrally fixed to the toolholder, to having one of them, the pre-flanging tool, retractile or retractable thus avoiding the tilting of the entire head between the first operation and the second operation.
  • the drive both for the tilting system of the head as well as for the retractile tool of the first operation, or of the holding-down plate or plates, is entrusted to pneumatic actuators constituted by cylinders.
  • the fixed and retractile tools or cutters have coupled to them respective dollies that reach a coincident position of superimposition when the retractile one is in the advanced position, that is, for the pre-flanging operation to take place.
  • the drive motor acts, the reaction stress produced on this tool is properly borne.
  • the flanging operation takes place in the phases shown in figure 1, by means of the pre-flanging tool 1 and the final flanging tool 2.
  • the pre-flanging tool or cutter 1 approaches the flange 3 of the exterior metal plate or panel 4 to make the flange 3 move to the position shown with a continuous line, from the position shown with broken lines.
  • the tool 1 descends to thus perform the pre-flanging operation, where the flange 3 takes an intermediate position.
  • phase c) the final flanging tool or cutter 2 completely folds the flange 3 until it is fully adhered to the edge of the interior plate 5.
  • Reference 6 in figure 1 designates the adhesive used for the sealing.
  • the exterior plate 4 is well supported on the support cradle 7 and at different points of its periphery other flanging devices identical to the one shown in the figures are mounted.
  • an elastic package 14 is assembled between the nut 13 and the activated means.
  • the toolhead referenced in general by number 16, has a tilting portion 17 that is joined to the pneumatic cylinder 18 through the system of connecting-rods 19, rotating around the tilting shaft 20 fixed to the frame of the machine.
  • This tilting of the head 16 is observed in diagram form in figure 2, shown with broken lines.
  • the electric motor 8 acts so as to perform the flanging operations.
  • the tool of the first operation formed by the pre-flanging cutter 1 (see figures 3 and 4) is arranged in a position under the fixed tool of the second operation, the final flanging operation.
  • the tool or cutter 1 is fastened to the tool-holder 21 mounted on guides 22 and constitutes the cutter that has the retractile function. This movement is caused by the action of the pneumatic cylinder 23 that acts on the connecting rod 24 integrally joined to the transmission shaft 25 that distributes its torsional stress to two sets of connecting rods 26 and 27 of the toggle link system.
  • the forward-backward retractile movement of the tool-holder corresponds: forward, first operation working position; back, withdrawn position so as to allow the lowering of the fixed tool 2 to the working position (see figures 3 and 4).
  • reaction stress that is produced on the tool of the first operation that is, on the pre-flanging cutter 1 are borne in a horizontal direction, towards the left of the figures, by the alignment of the guides 22 and the system of connecting rods 26 and 27, with three aligned points.
  • reaction stresses are borne by means of the dollies 28 inserted between the fixed tool 2 and the movable tool 1 (see figures 3 and 4).
  • the working precision positioning, forward-backward, of the pre-flanging tool 1 is carried out by means of the adjustable gauges 29, as can be seen more clearly in figure 5.
  • Reference 32 in figure 2 designates the means for guiding the vertical movement of the holding-down plate 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Automatic Assembly (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP20010500285 2000-12-18 2001-12-13 Improvements for joining metal parts Withdrawn EP1214993A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200003023 2000-12-18
ES200003023 2000-12-18

Publications (1)

Publication Number Publication Date
EP1214993A2 true EP1214993A2 (en) 2002-06-19

Family

ID=8496037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010500285 Withdrawn EP1214993A2 (en) 2000-12-18 2001-12-13 Improvements for joining metal parts

Country Status (6)

Country Link
EP (1) EP1214993A2 (es)
AR (1) AR031926A1 (es)
BR (1) BR0107021A (es)
CZ (1) CZ20014569A3 (es)
MX (1) MXPA01013189A (es)
PL (1) PL351237A1 (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105945144A (zh) * 2016-07-05 2016-09-21 上海众大汽车配件有限公司 一种汽车铰链加强板零件的模具
CN106216509A (zh) * 2016-09-23 2016-12-14 辉泰（太仓）汽配有限公司 一种汽车后门窗框加强板的级进模具
CN106311884A (zh) * 2016-09-23 2017-01-11 辉泰（太仓）汽配有限公司 一种汽车后门槛加强板连续模
CN107206463A (zh) * 2014-11-05 2017-09-26 英格马特有限公司 卷边机
CN115178612A (zh) * 2022-08-29 2022-10-14 中重科技(天津)股份有限公司 一种打捆钢带折弯装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107206463A (zh) * 2014-11-05 2017-09-26 英格马特有限公司 卷边机
CN105945144A (zh) * 2016-07-05 2016-09-21 上海众大汽车配件有限公司 一种汽车铰链加强板零件的模具
CN106216509A (zh) * 2016-09-23 2016-12-14 辉泰（太仓）汽配有限公司 一种汽车后门窗框加强板的级进模具
CN106311884A (zh) * 2016-09-23 2017-01-11 辉泰（太仓）汽配有限公司 一种汽车后门槛加强板连续模
CN106311884B (zh) * 2016-09-23 2018-01-12 辉泰（太仓）汽配有限公司 一种汽车后门槛加强板连续模
CN106216509B (zh) * 2016-09-23 2018-06-22 辉泰（太仓）汽配有限公司 一种汽车后门窗框加强板的级进模具
CN115178612A (zh) * 2022-08-29 2022-10-14 中重科技(天津)股份有限公司 一种打捆钢带折弯装置

Also Published As

Publication number Publication date
AR031926A1 (es) 2003-10-08
BR0107021A (pt) 2003-06-24
MXPA01013189A (es) 2004-05-21
CZ20014569A3 (cs) 2002-08-14
PL351237A1 (en) 2002-07-01

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