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
  • B21D19/00—Flanging or other edge treatment, e.g. of tubes
  • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
  • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
• • 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
  • B21D19/00—Flanging or other edge treatment, e.g. of tubes
  • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
  • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
  • B21D19/046—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of tubular products

Definitions

• the invention relates to a method according to the preamble of claim 1.
• the latter are mainly used for fan housings.
• the simple shelves can be produced with two rollers on beading and flanging machines.
• the flat flanges that were later perforated are produced using the printing process.
• the tubular body is brought into high circulation speed, which is only possible with very short tubular bodies such as axial fan housings.
• the pipe end is in a negative form of the flat flange to be molded.
• the "push” process is similar to the shaping of clay on the potter's wheel. It is also used to form ring rims on short pipe rings, which are then attached to a pipe end and attached to it. This latter method is described for example in DE 196 32857 AI.
• the present invention now seeks to provide a method and a device for carrying out this method, with which the one-piece molding of even complicated flanges and rims is possible not only on short but in particular also on long pipe sections with economic effort.
• the basis of the method according to the invention is to use the advantages of the linear swivel bending method also when bending pipe ends. It is therefore called a circular Swivel bending process called.
• the linear swivel bending process cannot, of course, be transferred to round pipes without modifications, since they do not have to produce straight, but curved edges, and these should also be produced with different radii without changing tools, if possible.
• the invention accomplishes this by round-stretching the pipe end from the inside, for example by means of a clamping washer.
• This clamping disc has a slightly smaller diameter than the inner pipe diameter before clamping. After insertion, it is spread out, ie the diameter is increased until it stretches with the outer circumference against the inside of the pipe wall.
• the tensioning disk or other device used for tensioning can be connected to a strong drive axle for the execution of the pipe rotation.
• a pivotable bending jaw is preferably used, which is in its basic position or parking position the inside of the pipe end. Its axial width should be at least somewhat larger than the section of the pipe end to be bent. This ensures that the section to be bent is lifted as a whole and does not change its straight shape.
• the contact surface of the bending jaw at the pipe end should preferably have the same radius as the inside of the pipe, so that the section of the pipe end to be bent has a large surface area.
• the form roller and its holder are connected to the stationary and non-rotating bending jaw and its drive devices to form a fixed unit, which significantly increases the stability of the device becomes.
• FIGS. 1 to 12 show the work sequence of the method according to the invention on the basis of successive work steps for forming a cone flange onto the end of a tube, the device parts shown schematically in side view serving only as an example of the machining effects of the method to be achieved thereby and also by others or otherwise shaped devices could be replaced
• FIG. 13 shows a schematic side view of a first embodiment of the device for carrying out the method according to the invention in a first working position
• FIG. 14 shows a side view of the device corresponding to FIG. 13 in a second working position
• FIG. 15 shows a side view of the device corresponding to FIG. 13 in a third working position
• Figure 16 is a schematic partial section along the line XVI -XVI in Fig. 13,
• FIG. 17 shows a schematic end view of the tensioning disk used in the device according to FIGS. 13 to 18,
• FIG. 18 shows a schematic side view of the parts shown in FIG. 17,
• FIG. 19 shows a schematic side view of a part of the device according to the invention comprising a tensioning disk, tube and their drive device,
• FIG. 20 shows a sectional side view, again reduced compared to FIG. 19, of a part of the components shown in FIG. 19,
• FIGS. 21 and 22 axial section or schematic side view of another embodiment of the tensioning disk
• FIGS. 23 and 24 are schematic side views of the tube, the tensioning disk, the bending jaws and the form roller with the bending jaw at different positions
• FIGS. 25 to 29 show a schematic partial side view of a tensioning disk and a bending jaw in different bending positions with form rolls having different cross sections or without form rolls,
• Figures ' 30 and 31 partially broken schematic oblique views of parts of a device according to the invention with tube, tensioning disc,. Form roller and bending jaws in the park position or bending position of the bending jaw,
• CD £ CD d 3 CD ⁇ tr ⁇ SU: fr ⁇ 0 H tr Pi ⁇ F- ⁇ 3
• CD P CD SU a CD CD F-> J HH F- ⁇ CQ CQ i ⁇ P ⁇ F- F- ⁇
• the clamping disk 22 was spread into its working position in the manner described below and now clamps the tube 12 cylindrically from the inside. This results in a tube piece 10 projecting over the cylindrical outer surface of the tensioning disk 22, which is to be bent over by the subsequent bending process.
• the work unit consisting of bending jaws, form roller and associated bearing and drive devices is adjusted by means of the slide 70 along the double arrow 74 with respect to the fixed base plate 72 so that it adjusts to the respective diameter of the tube 12 is adjusted. Only one such work unit is shown in FIGS.
• Additional work units can be attached to the base plate 72 with mostly double slide guides 71 leading away from the tube axis 28, so that they can be used one after the other on the tube 12 in order to deform one piece of tube into part of a complicated flange.
• a rotary drive 76 with a threaded spindle 78, a thread runner 110 running on the threaded spindle 78 and a holder 112 connecting the slide 70, the holder 112 being displaced in a slot 114 in the base plate 72 which extends radially to the tube axis 28 can.
• the structure and operation is a first one of 'execution form the clamping disk 22 described in more detail with reference to Figures 17 through 20th Since the function of the tensioning disk 22 is to prevent all changes in shape of the inside of the pipe, it is important that its cylindrical circumferential surface 116 be in full contact with the pipe wall.
• the illustrated preferred embodiment of the tensioning pulley therefore has a division into several sectors 118 in the exemplary embodiment shown, which in a manner to be explained in more detail below by the widening end 120 of a pull rod 122 provided with an axial drive, for example in the form of a hydraulic cylinder 124, from the left half of the figures 17 and 18 shown inner parking position in an outer working position shown in the right half of Figures 17 and 18 in a tensioned system on the inside of the tube 12 are spread.
• the number of sectors is unlimited.
• a larger number of sectors has the advantage that the gaps 126 between the sectors 118, which arise when the tensioning disk 22 is spread, become smaller and are bridged by the wall of the tube 12, even if it is very thin-walled, without changing the shape of the tube .
• the sectors 118 are circular ring sectors and end on the inside at a distance from the tube axis 28 in an inner surface 128 in the form of a cylindrical section.
• the radial width of the sectors 118 can be freely selected in order to adapt the diameter of the tensioning disk 22 to the respective diameter of the tube 12. This adjustment can be done by simply changing the sectors 118.
• the inner surfaces 128 of the sectors 118 bear against the cylindrical outer surfaces 130 of clamping jaws 132 in the form of annular sectors.
• the sectors 118 are attached to the jaws 132 by radial screws 142.
• the clamping jaws 132 have an inner end face 134 which is oblique with respect to the tube axis 28 and which in each case abut against a side face 136 of the widening end 120 of the pull rod 122.
• the widening end 120 has a hexagonal cross section, so that one side surface is provided for each of the six clamping jaws 132.
• the main drive shaft 24 provided for rotating the tensioning disk and the tube 12 is axially pierced in the middle, and this F- ⁇ FN ö LQ F ri Pi LQ er to z ⁇ 5 B Tl ⁇ ö ⁇ Mi rt TJ zöl CQ P LQ ⁇
• the return of the clamping jaws 132 when the clamping disk 22 is relaxed back into its parking position can be done in a simple manner by springs, not shown, which are embedded in the individual clamping jaws, or also by an endless tension spring, which is also not shown, and which runs around the outer circumference of the clamping jaws is embedded in a groove, not shown.
• the drive shaft 24 can also be supported with a ball slewing ring 164, the outside (or also the inside) of which is provided with teeth 166.
• the drive motor 146 is placed next to the ball slewing ring 164.
• the pinion 168 of its output shaft 170 engages in the toothing of the ball slewing ring 164 and ensures the drive of the drive shaft 24.
• other types of bearings familiar to the person skilled in the art are also possible.
• FIGS. 21 and 22 Another advantageous embodiment of the tensioning pulley, generally designated 22, and its drive is shown in FIGS. 21 and 22.
• F- rt P F LQ ⁇ ⁇ F ⁇ co F- P.
• the insertion side of its cylindrical outer surface 48 can have a conical bevel 192.
• FIGS. 25 to 28 show different embodiments of the form roller 32 or 34 with a slender tip 36 or a right-angled tip 38.
• the tip 36 serves to bend the pipe section 10 by 150 °
• the tips 38 serve to bend the pipe section 10 by 90 °.
• Fig. 29 it is shown schematically how, with lower demands on the shape accuracy of the molded flange or flange, it is possible to bend without a form roller only with a tensioning washer 22 and bending jaws 26.
• FIGS. 30 and -31 show an embodiment of the bending jaw 26 with an almost semi-cylindrical contact surface 190 in the park position (FIG. 30) and working position (FIG. 31).
• the entire device according to the invention for carrying out the circular swivel bending method according to the invention can optionally be used both with a horizontal and with a vertical tube axis 28, the former being preferred for straight tubes and the latter for short tubular fittings.
• two circular swivel bending devices 204 are placed on a common rail system, generally designated 202, along this system so as to be movable along the double arrow 206, so that the two-sided, schematically indicated tensioning washers 22 and bending jaws 26 face each other.
• Each device 204 can be moved on the rail system 202 by its own driven threaded spindle 208.
• the devices 204 are moved apart until the tube length of the tube 12 fits between the clamping disks 22. Then both devices 204 move together, the clamping disks 22 dip into the pipe ends up to a stop which is set to the machining length of the pipe end. Both clamping discs 22 are clamped into the working position, and then the machining process takes place simultaneously on both sides. For the Taking the tube 12, the devices 204 must be moved apart again.

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• 2000
  • 2000-09-25 DE DE10047310A patent/DE10047310A1/de not_active Withdrawn
• 2001
  • 2001-09-22 IL IL15501401A patent/IL155014A0/xx unknown
  • 2001-09-22 DE DE50103424T patent/DE50103424D1/de not_active Expired - Lifetime
  • 2001-09-22 EP EP01985241A patent/EP1320429B1/de not_active Expired - Lifetime
  • 2001-09-22 AT AT01985241T patent/ATE274381T1/de active
  • 2001-09-22 AU AU2002218191A patent/AU2002218191A1/en not_active Abandoned
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  • 2001-09-22 CZ CZ20030853A patent/CZ297829B6/cs not_active IP Right Cessation
  • 2001-09-22 US US10/381,385 patent/US20040089043A1/en not_active Abandoned
  • 2001-09-22 ES ES01985241T patent/ES2225627T3/es not_active Expired - Lifetime
  • 2001-09-22 HU HU0302953A patent/HUP0302953A2/hu unknown
  • 2001-09-22 RU RU2003112016/02A patent/RU2003112016A/ru not_active Application Discontinuation
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  • 2001-09-22 CA CA002424583A patent/CA2424583A1/en not_active Abandoned
  • 2001-09-22 CN CNA018162541A patent/CN1466499A/zh active Pending
  • 2001-09-22 JP JP2002528427A patent/JP2004508936A/ja active Pending
  • 2001-09-22 KR KR10-2003-7004237A patent/KR20030065482A/ko not_active Application Discontinuation
  • 2001-09-22 WO PCT/EP2001/010962 patent/WO2002024369A1/de active IP Right Grant
• 2003
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