EP2809505A1 - Biegepresse mit c-förmigem rahmen - Google Patents
Biegepresse mit c-förmigem rahmenInfo
- Publication number
- EP2809505A1 EP2809505A1 EP13709293.8A EP13709293A EP2809505A1 EP 2809505 A1 EP2809505 A1 EP 2809505A1 EP 13709293 A EP13709293 A EP 13709293A EP 2809505 A1 EP2809505 A1 EP 2809505A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- shaped frame
- linear motor
- frame
- linear motors
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/04—Frames; Guides
- B30B15/047—C-shaped frames
-
- 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
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/04—Frames; Guides
- B30B15/044—Means preventing deflection of the frame, especially for C-frames
Definitions
- the invention relates to a press with a C-shaped frame, comprising a first linear motor facing away from a pressing point at a central portion of the C-shaped frame.
- Presses are common in modern manufacturing processes. For example, presses are used for joining (e.g., press-fitting bushings), severing (e.g., cutting sheet metal strips), master forming (e.g., pressing powders into bodies), and forming (e.g., bending or deep-drawing sheets). Even these few examples show how versatile presses are used in technology. In principle, a distinction can be made between presses with an open or C-shaped frame and presses with a closed or O-shaped frame. The invention now relates to presses with C-shaped frames in which the asymmetric structure without additional measures leads to a springing of the frame as soon as a force is applied to the pressing site.
- DE 1906223 AI a press with a C-shaped frame is known, in which a bending of the frame is balanced under load by a hydraulic cylinder facing away from the pressing.
- JP 02-274400 A2 shows a press with a C-shaped frame, in which a springing of the frame by two L-shaped arranged on the frame hydraulic cylinder to be compensated.
- DE 30 27 495 AI discloses another example in which a springing of a frame to be counteracted by a hydraulic cylinder facing away from a pressing.
- US Pat. No. 5,097,734 shows a last example of a press in which springing up of a C-shaped frame by means of compensating cylinders is counteracted. The force of the compensating cylinder is introduced via a linkage in the frame.
- the object of the invention is therefore to provide an improved press, in particular one in which a force is reduced to the central part of the C-shaped frame.
- a press according to claim 1 namely a press of the type mentioned above, additionally comprising a pressing point facing, the second linear motor at the central portion, wherein the linear motors are provided for a counteracting drive, such that a springing of the C-shaped
- the linear motors in each case act between two mutually distanced fastening points at the middle section of the frame, ie one at the front of the middle frame section adjacent to the pressing point and the other at the rear side remote from the pressing point of the central frame section.
- the middle part of the C-shaped frame is relieved by the other linear motor. That's why the frame can now be made smaller which results in lower material usage and therefore lower weight.
- the middle section of the C-shaped frame has a constriction in the case of the linear motors. In this way, the effect of the linear motors can be increased, since the frame does not oppose the compensation forces of the linear motors so much resistance.
- the middle section of the C-shaped frame is separated in the linear motors. In this way, the compensation force of the linear motors can be developed even better. Furthermore, the C-shaped frame can be built even easier. In a particularly advantageous variant, even the drive of the punch can be taken over by the linear motors according to the invention.
- the press comprises a sensor for detecting a springing up of the C-shaped frame and an associated control, which is prepared for the control of the linear motor, so that a springing of the C-shaped frame is counteracted.
- the sensor comprises a photosensitive position detection element, which is arranged on one leg of the C-shaped frame, and a laser light source which is arranged on the other leg of the C-shaped frame, wherein the laser light source for illuminating the position detection element is provided.
- hydraulic cylinders are provided as linear motors. Hydraulic cylinders are particularly suitable for applying high forces.
- a hydraulic system already exists in many presses anyway, so that these presses can be easily equipped or retrofitted with the inventive device.
- a connecting line is provided between the hydraulic cylinders, such that a pressure is generated by the pressing process in the facing / averted hydraulic cylinder, which pressure is conducted to the facing / facing hydraulic cylinder.
- a pump which pressurizes the hydraulic oil, that is, the system works passively.
- This system is therefore particularly well suited for retrofitting presses that do not have their own hydraulic system.
- the linear motors are driven so that the tip of the punch in a pressing operation with respect to a horizontal X-axis direction in a vertical plane through the center of the die or when the linear motors are controlled so that the orientation of the punch during a pressing parallel to the alignment of the die, ie in the vertical direction, depending on which variant the better bending results can be achieved.
- Figure 1 is a schematically illustrated press with a C-shaped frame in an oblique view.
- Figure 2 shows the springing of the C-shaped frame.
- FIG. 3 shows a first variant of a press with two opposite hydraulic cylinders to reduce the springing
- FIG. 4 shows a second variant of a press with a separated frame.
- Fig. 5 shows the balance of power in a press according to Fig. 3;
- Fig. 6 shows the balance of power in a press according to Fig. 4;
- Fig. 7 is a schematically illustrated control of the hydraulic cylinder of the press according to the invention.
- Fig. 1 shows a schematically illustrated press 1 with a C-shaped frame 2 in an oblique view, wherein the frame 2 comprises a central portion 2a and two legs 2b, 2c.
- the press shown consists of two frame members 2 which are connected by an upper crossbar 3, to which a punch 4 is attached, and a lower crossbar 5, to which a die 6 is attached.
- the upper crossbar 3 by means of a drive, not shown (eg hydraulic cylinder, spindle drive, etc.) can be moved vertically in a conventional manner, in this way, punch 4 and die 6 from the rest position shown in a pressing position against each other ,
- a drive not shown (eg hydraulic cylinder, spindle drive, etc.)
- punch 4 and die 6 from the rest position shown in a pressing position against each other ,
- this arrangement is not absolutely necessary for the invention, but rather it is also conceivable that the lower pressing bar 5 or both pressing bars 3 and 5 are displaceable.
- Fig. 2 now shows the springing of the C-shaped frame 2, when a pressing force between
- Stamp 4 and die 6 is generated.
- the middle section 2a and the upper leg 2b are deformed (it is assumed that the lower leg 2c is firmly anchored in the ground).
- the ratios of better representability half are of course greatly exaggerated.
- the deformations are usually much smaller.
- a photosensitive position detection element 7 which is arranged on the bottom or on the lower leg 2c of the frame 2 and which is irradiated by a laser light source 8, which is attached to the upper leg 2b, the deformation of the frame 2 can be measured. It is clearly visible how the deformation of the frame 2 leads to a change in the laser beam a, which can be measured as a length at the position detection element 7.
- the position detection element 7 can be constructed, for example, from a plurality of juxtaposed photosensitive cells. But other designs are equally applicable. This springing now leads to the fact that the feed of the punch 4, which is determined at the drive (for example, by position sensors on the associated hydraulic cylinders) does not actually act at the press point between the punch 4 and die 6. In addition, there is an angular offset and a lateral offset between the punch 4 and die 6. All these factors cause the bending result on the one hand, qualitatively unsatisfactory and also difficult to reproduce.
- FIG. 3 now shows a first variant of a press in which a first linear motor 9, which faces away from the pressing point, and a second linear motor 10, which faces the pressing point, counteracts the springing of the frame 2.
- the first linear motor 9 acts between two attachment points on the rear side of the middle frame section 2a and the second linear motor 10 acts between two attachment points on the front side of the middle frame section 2a.
- linear motors 9 and 10 hydraulic cylinder are provided as linear motors 9 and 10 hydraulic cylinder.
- this is not to be understood as limiting the invention, because in principle also other types of linear motors can be used, in particular spindle drives.
- the first hydraulic cylinder 9 is now subjected to a first pressure pi, which leads to a pressure force between the attachment points of the first hydraulic cylinder 9 or to an increase in the distance between them.
- the second hydraulic cylinder 10 is acted upon by a second pressure p 2 , which leads to a tensile force between the attachment points of the second hydraulic cylinder 10 and a shortening of the distance between them.
- the middle section 2a in the region of the hydraulic cylinders 9 and 10 has a constriction b in order to increase the action of the hydraulic cylinders 9 and 10.
- the pressures pi and p 2 can be actively built up by a hydraulic pump. It is also conceivable that the two hydraulic cylinders 9 and 10 are connected by a line.
- the system is passive. 4 shows a second variant of a press 1 ", similar to the press shown in Fig. 3.
- the frame 2 is completely separated in the area of the hydraulic cylinders 9 and 10.
- the forces between upper and lower part of the central portion 2a of the frame 2 become thus transmitted only by the hydraulic cylinders 9 and 10.
- mounted in the lower part bar 11 is mounted between two guides 12 arranged on the upper part.
- the "classic” drive a press 1 ", namely the linear motors for moving the upper crossbar 3, thus can be omitted in principle and instead be taken over by the hydraulic cylinders 9 and 10.
- the press 1 " has a suitable control (see also FIG. 7)
- the guide 12 can be made relatively delicate, since in the ideal case all moments are compensated and only forces act in the vertical direction.
- Fig. 5 shows the balance of forces on a press as shown in Fig. 3.
- the pressing force F P acts on the frame 2
- the opposite frame force F R acts on the frame 2
- pressing force Fp and frame force F R are equal in magnitude.
- the forces Fi and F 2 of the hydraulic cylinders 9 and 10 thus serve only for torque compensation. In terms of magnitude, these forces Fi and F 2 are relatively large because of the short lever. It is also conceivable, of course, for the hydraulic cylinders 9 and 10 to take over part of the frame force F R. F 2 then becomes larger in size, Fi smaller in amount.
- Fig. 6 shows the balance of power on a press 1 "as shown in Fig. 4 and thus an extreme case of said assumption of the frame force F R , which is completely eliminated in this example.
- Fig. 7 shows an arrangement in which the two hydraulic cylinders 9 and 10 (not shown here) are regulated.
- a hydraulic pump 14 is provided, which hydraulic oil from a reservoir 13 via valves 15 and 16 to the two hydraulic cylinders. 9 and 10 pumps.
- the first valve 15 controls the first pressure pl for the first hydraulic cylinder 9
- the second valve 16 controls the second pressure p2 for the second hydraulic cylinder 10.
- a sensor (in the example shown, this is the photosensitive position detection element 7 of FIG. 2, which is irradiated by a laser light source 8) transmits the angular offset between punch 4 and die 6 (that is, a length derived from the angular offset here) to a controller 17.
- the control 17 determines from this signal control signals for the valves 15 and 16.
- the hydraulic cylinders 9 and 10 can be controlled in this way so that an offset between the punch 4 and die 6 is completely compensated. This is particularly advantageous in the case of a press 1 "according to FIG. 4, since then no moment is transmitted between the beam 11 and the guides 12.
- the control 17 can be constructed in principle from any commercially available controller. However, it is particularly advantageous if the controller 17 is constructed from a central processing unit with a memory connected thereto. In the memory then necessary for program execution steps and parameters are stored and retrieved at runtime from the central processing unit. In particular, in the case of a press 1 "according to FIG. 4, this is advantageous since the control 17 can then also control the vertical displacement of the upper transverse bar 3.
- the linear motors 9, 10 are controlled such that the tip of the punch 4 is pressed in a pressing operation relative to a horizontal X axis. Axial direction in a vertical plane through the center of the die 6 or the linear motors 9, 10 are driven so that the orientation of the punch 4 in a pressing operation parallel to the alignment of the die 6.
- a bending press is always shown in the figures, the invention is by no means exclusive to a bending press or a bending press. press of the type shown relates. Rather, the invention also relates to other presses, for example stamping presses, deep drawing presses, forging presses, embossing presses, etc. Furthermore, the invention is independent of the nature of the drive of the press and therefore equally relates to eccentric presses, toggle presses, crank presses, screw presses, hydraulic presses Finally, the application of the principle according to the invention is not limited to presses in which a compressive force acts between the two legs of the C-shaped frame, but can also be extended to cases in which a tensile force acts at this point. The statements made to the figures are then to reverse accordingly.
- FIGS. 1 to 7 can form the subject of independent solutions according to the invention.
- the relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Control Of Presses (AREA)
- Press Drives And Press Lines (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT1342012A AT511594B1 (de) | 2012-01-31 | 2012-01-31 | Biegepresse mit c-förmigem rahmen |
PCT/AT2013/050028 WO2013113052A1 (de) | 2012-01-31 | 2013-01-30 | Biegepresse mit c-förmigem rahmen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2809505A1 true EP2809505A1 (de) | 2014-12-10 |
EP2809505B1 EP2809505B1 (de) | 2016-03-30 |
Family
ID=47667369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13709293.8A Not-in-force EP2809505B1 (de) | 2012-01-31 | 2013-01-30 | Biegepresse mit c-förmigem rahmen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2809505B1 (de) |
AT (1) | AT511594B1 (de) |
WO (1) | WO2013113052A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8935949B2 (en) | 2012-10-09 | 2015-01-20 | The Boeing Company | C frame structure configured to provide deflection compensation and associated method |
PT3208007T (pt) * | 2014-10-17 | 2020-11-10 | Adira Metal Forming Solutions S A | Sistema de compensação de deformação para uma quinadeira |
DE102019107539A1 (de) * | 2019-03-25 | 2020-10-01 | Weber Ultrasonics AG | Gestell für eine Bearbeitungsmaschine und Verfahren zum Bearbeiten eines Werkstücks mit derselben |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2580078A (en) | 1945-05-28 | 1951-12-25 | Denison Eng Co | Press mechanism |
GB1181941A (en) | 1968-02-08 | 1970-02-18 | Norton Tool Company Ltd | Presses |
DE1957052A1 (de) * | 1969-11-13 | 1971-05-27 | Walter Theobald | Spannungsfreies Maschinengestell fuer Scheren,Pressen aller Art,Schmiedemaschinen u.dgl. |
DE3027495A1 (de) | 1980-07-19 | 1982-02-18 | Karl Mengele & Söhne Maschinenfabrik und Eisengießerei GmbH & Co, 8870 Günzburg | Presse |
JPH02274400A (ja) | 1989-04-12 | 1990-11-08 | Aida Eng Ltd | C型フレームプレス |
US5097734A (en) | 1990-07-25 | 1992-03-24 | Murata Wiedemann, Inc. | Open frame punch press with punching reaction force neutralizing system |
BR9406555A (pt) * | 1993-02-01 | 1996-01-02 | Bruno Svoboda | Máquina de fundição por injeção |
DE9402825U1 (de) * | 1993-02-23 | 1994-06-23 | Svoboda, Bruno, Wien | Spritzgießmaschine |
JPH07108480B2 (ja) * | 1993-03-26 | 1995-11-22 | 日清紡績株式会社 | 液圧式プレス装置 |
JP2540450B2 (ja) * | 1994-08-17 | 1996-10-02 | 日清紡績株式会社 | C形フレ―ム構造のプレス装置 |
AT501264B8 (de) * | 2004-09-10 | 2007-02-15 | Trumpf Maschinen Austria Gmbh | Verfahren zur herstellung eines werkteils durch biegeumformung |
DE102007020166A1 (de) * | 2007-04-26 | 2008-10-30 | Robert Bosch Gmbh | Werkzeughalter mit mechanischen Wirkmitteln |
-
2012
- 2012-01-31 AT AT1342012A patent/AT511594B1/de not_active IP Right Cessation
-
2013
- 2013-01-30 WO PCT/AT2013/050028 patent/WO2013113052A1/de active Application Filing
- 2013-01-30 EP EP13709293.8A patent/EP2809505B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2013113052A1 * |
Also Published As
Publication number | Publication date |
---|---|
AT511594A4 (de) | 2013-01-15 |
AT511594B1 (de) | 2013-01-15 |
WO2013113052A1 (de) | 2013-08-08 |
EP2809505B1 (de) | 2016-03-30 |
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