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
  • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
  • B21D5/0272—Deflection compensating means
• • 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
  • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
  • B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection

Definitions

• the invention relates to a bending press as described in the preamble of claim 1.
• Document WO 2000/13813 A1 discloses a bending press with a table beam and a pressure bar which is adjustable relative thereto, in which the table bar has V-shaped recesses extending from opposite side surfaces over a partial area of half a table bar length, acting as weakening zones - Are formed by resilient, cantilevered table areas.
• the recesses are bridged by adjustable adjusting means, which are supported on the one hand in the foot region of the table beam and a control member is drivingly connected to the projecting portion of the table beam.
• This design allows a bearing surface of the table beam for the bending tool seen over a length of the table beam vorzukrümmen arcuately to compensate for the resulting bending of the table beam resulting from the pressure load during the forming process.
• EP 0 543 772 A1 discloses a two-part upper cheek of a bending press and with a free-lying lower cheek.
• the upper cheek is approximately divided into two, with the two cheek parts in the mid-cheek being in contact with each other and being separated on either side of the contact point by a respective widened in the direction of the edge regions gap.
• the force introduction of the drives for the adjustable upper beam takes place at the upper cheek part.
• the subdivision of the upper beam uniform deflection is achieved when applying a forming force and the bending lines of the upper beam and the lower beam approximately balanced.
• the object of the invention is to provide a bending press, with the occurring under force deformations of the machine frame have no significant effect on the forming accuracy and on the drive device.
• This object of the invention is achieved by the reproduced in the characterizing part of claim 1 features.
• the surprising advantage here is that thereby the drive means carrying on a top mounting ring relative to the mounting area with the press frame resilient is supported and thus regardless of its deformation alignment of the drive means to avoid transverse forces is achieved.
• Embodiments according to claims 15 and 16 are also advantageous, whereby a design of weakening zones in the pressure beam is achieved in coordination with possible fields of use.
• an embodiment according to claim 17 is also advantageous, because thereby a controllability of a deformation region of the pressure beam is achieved according to application-specific parameters.
• FIG. 1 shows a bending press according to the invention in view.
• Fig. 2 the bending press in side view
• Fig. 4 shows another embodiment of the pressure beam in view
• FIG. 5 shows a mounting plate for a drive assembly of the bending press.
• Fig. 6 shows another embodiment of the mounting plate.
• a bending press 1 and 2 a bending press 1, in particular press brake 2 for the production of workpieces 3 between relatively adjustable bending tools 4 is shown.
• press brake 2 for the production of workpieces 3 between relatively adjustable bending tools 4 is shown.
• a machine frame 5 of the bending press 1 consists for example of a bottom plate 6 on the vertically upstanding, spaced from each other and parallel to each other aligned side cheeks 7, 8 are arranged. These are preferably connected by a massive, formed for example from a sheet metal part cross member 9 at their distance from the bottom plate end portions.
• the side cheeks 7, 8 are approximately C-shaped to form a free space for the forming of the workpiece 3, wherein a fixed, on the bottom plate 7 rising table bar 11 is attached to front end faces 10 of bottom-side legs of the side cheeks 8. At front end faces 12 of bottom-removed legs is in linear guides 13 a to
• Table bar 11 relatively adjustable pressure bar 14 stored.
• the bending press 1 shown has, as a drive arrangement 18 for the adjustable pressure bar 14, two electric-powered drive means 19, which are line-connected to a control device 21 fed from a power grid 20.
• the operation of the bending press 1 is controlled via a line-connected input terminal 22 connected to the control device 21.
• a drive means 19 both acted upon by a pressure medium cylinder are possible, but also electromotively operated spindle drives 23, e.g. with a spindle nut driven in rotation in a housing with a threaded spindle connected to the pressure bar as adjusting means.
• the drive of the spindle nut can be done for example by a high-pole electric motor, for example Torque motor.
• Adjusting means 24 of the drive means 19 are drive-connected to this for a reversible adjusting movement of the pressure bar 14, wherein to compensate for any deformations of the pressure bar 14 or a support bearing device 25 for the drive means 19 by fastening means 26, eg bolts occurs.
• the table bar 11 has in the embodiment shown a Tischaus Principleung 27 to create a free space for the legs of an operator, so that the operation of the bending press 1 sitting is possible, for example, in a small-scale mass production. However, this training is more suitable for bending press 1 lower printing performance due to the reduced deformation resistance of the table beam 11.
• the weakening zones on both sides of the fastening means 26 of the adjusting means 24 with the pressure bar 14 allow compensation in a deformation of the pressure bar 14, as occurs for example at a central load by the forming process of the workpiece 3 between the bending tools 4 and based on the drawn in broken lines bending line 33rd for the pressure bar 14 is shown.
• the compensation is achieved by a spring action as a result of the weakening zones and is thereby maintained by the arrangement of the drive means 19 predetermined distance 34 between the power lines of the two drive means 19 and thus avoids lateral loads acting on the adjusting means 24.
• these weakening zones effect a force uniformly distributed over an entire length 35 of the pressure bar 14, for example, during a forming operation over the entire length 35 of the pressure bar 14, a counter-deformation of the bending line 33 in the opposite end regions of the pressure bar 14 and thereby lower measures a bending angle compensation on the workpiece 3 required.
• FIGS. 3 and 4 different embodiments of the design of the weakened zones in the pressure bar 14 are shown.
• the vertically arranged material cut-through for example, at a greater distance 36 than the distance 34 between the power lines 29 corresponds arranged.
• weakening zones 38 are provided in the middle region of the pressure bar 14, for example, based on an end face 37 for supporting the bending tool 4 concave or convex curved, or rectilinear.
• the weakening zone 38 in the pressure bar 14 may be formed, for example, by a slot, but also by a groove-shaped depression in the surface with the remaining wall web, etc. Furthermore, the possibility exists of bridging the weakening zones, an actuator, e.g. provided with a pressure medium cylinder to provide, with the degree of weakening can be regulated.
• FIG. 5 now shows in detail a possible embodiment of the support bearing device 25 for a drive arrangement of the bending press with two of the drive means 19.
• the mounting plate 40 is provided in the distance 34 of the drive means 19 with two holes 41 which are penetrated by a housing projection 42 and the adjusting means 24 of the drive means 19.
• the holes 41 comprising mounting rings 43 for Auflagerung the drive means 19, for example by means of a flange not shown, formed by the formation of the side cheeks 8 facing edge recesses 40 and an opening provided in the middle between the holes 41 breakthroughs 45 support webs 46, 47 are connected by edge strips 48, 49 formed mounting area.
• the Mounting plate 40 is screwed, for example, with the cross-dressing 9 forming profiles.
• FIG. 6 shows a further embodiment of the support bearing device 25 designed in two parts in this embodiment.
• the description is limited to one of the identically formed mounting plates 40 which are each designed to receive one of the drive means 19 and are mounted separately on the cross-member 9 between the side cheeks 7, 8 of the machine frame 5.
• the mounting plate 40 has the projected by the adjusting means 24 of the drive means 19 bore 41. Concentric with the bore 41 are provided in the direction of the edge strips 48, 49 distanced, circular arc-shaped openings 45, whereby the bore 41 surrounding the mounting ring 43 is formed, which is provided for the attachment of the drive means 19 with a flange not shown.
• Vertexes of the circular arc-shaped openings 45 are assigned to the edge strips 48, 49, wherein mutually opposite end portions of the apertures 45 are spaced apart whereby two diametrically opposed connecting webs 53, 54 with an annular plate portion 55, with the by the edge strips 48, 49th formed mounting area 50 via the already described in the previous figure, formed by the Randausnaturalept 54 supporting webs 46, 47 is connected.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bending Of Plates, Rods, And Pipes (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (2)

Family

ID=42027698

Family Applications (1)

Country Status (6)

Cited By (2)

Families Citing this family (4)

Family Cites Families (13)

• 2008
  • 2008-10-15 AT AT0161108A patent/AT507412B1/de not_active IP Right Cessation
• 2009
  • 2009-10-12 JP JP2011531297A patent/JP5592384B2/ja not_active Expired - Fee Related
  • 2009-10-12 WO PCT/AT2009/000397 patent/WO2010042962A2/de not_active Ceased
  • 2009-10-12 ES ES09756648T patent/ES2398495T3/es active Active
  • 2009-10-12 EP EP09756648A patent/EP2362815B1/de active Active
  • 2009-10-12 US US12/998,403 patent/US8511132B2/en not_active Expired - Fee Related

Also Published As

Similar Documents

Legal Events