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EP1542816A1 - Bending machine - Google Patents

Bending machine

Info

Publication number
EP1542816A1
EP1542816A1 EP20030740348 EP03740348A EP1542816A1 EP 1542816 A1 EP1542816 A1 EP 1542816A1 EP 20030740348 EP20030740348 EP 20030740348 EP 03740348 A EP03740348 A EP 03740348A EP 1542816 A1 EP1542816 A1 EP 1542816A1
Authority
EP
Grant status
Application
Patent type
Prior art keywords
bending
beam
setting
operation
curving
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
Application number
EP20030740348
Other languages
German (de)
French (fr)
Other versions
EP1542816B8 (en )
EP1542816B1 (en )
Inventor
Wolfgang Kutschker
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.)
RAS Reinhardt Maschinenbau GmbH
Original Assignee
RAS Reinhardt Maschinenbau GmbH
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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0272Deflection compensating means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D27/00Envelopes or like essentially-rectangular containers for postal or other purposes having no structural provision for thickness of contents
    • B65D27/06Envelopes or like essentially-rectangular containers for postal or other purposes having no structural provision for thickness of contents with provisions for repeated re-use

Abstract

The invention concerns a bending machine comprising a machine frame (10), and upper bar (16) and a lower bar (18) mounted on the frame and mutually mobile, a bending bar mounted on the frame, a bending bar mounted on the frame and mobile relative to the frame, to the upper bar and to the lower bar, said bending bar being provided with a support and a bending tool pressing on said support via a bending device actuated by a control unit (72). The invention aims at making the bending adjustment faster and more accurate. Therefor, said bending device is equipped with an adjusting device capable of being used during a bending operation; the adjusting device, which is actuated by the control unit, can be controlled during a bending operation; at least one sensor associated with the control unit enables detection, through the adjusting device, of an adjustment performed by the control unit. For a given bending operation, the control unit determines at least one bending parameter for the bending device, the bending bar tool being set in a substantially flexure-free position at the end of the bending operation.

Description

bending machine

The invention relates to a bending machine comprising a machine frame, an upper beam and a lower beam, both of which are movably supported on the machine frame and relative to each other, one held on the machine frame and relatively movable thereto and to the upper beam and lower beam bending beam having a bending beam carrier and a one at the bending beam carrier via controllable by a control curving supported bending beam tool.

Such bending machines are known from the prior art.

In these, the setting of the curving in a manual way carried out, wherein to determine the appropriate setting of the curving for a particular bending operation by a series of experiments.

The invention has for its object to improve a bending machine of the generic type such that the setting of the curving is faster and more accurate possible.

This object is achieved in a bending machine of the type described at the outset according to the invention characterized in that the curving device is provided with an operable during a bending operation setting device that, with the control, the actuator is controlled also during a bending operation, that at least one of the controller associated sensor is provided, with which by the control adjustment of the curving device can be determined by the adjusting means and that at least one adjustment parameter for the curving device can be determined for a particular bending operation by the controller, is in which the bending beam tool deflection-free aligned at the end of this bending operation substantially.

The advantage of the inventive solution is the fact that, in this the possibility exists to adjust the one hand via control the curving during a bending operation and on the other hand, the controller has the possibility to determine at least one adjustment parameter for the curving device for a particular bending operation, wherein the bending beam tool is oriented at the end of this bending operation substantially deflection-free.

Thus, it is at least possible to adjust the curving device even during a bending operation so that upon completion of the bending operation the bending beam tool is deflection-free aligned, and thus that of the deflection-free alignment of the bending beam tool comprises the bent from the bending beam tool workpiece after termination corresponding accurate bend as well.

The number of adjustment parameters may be different in the inventive solution.

The simplest solution provides that the at least one setting parameter is a single adjustment parameter, namely the maximum, during the defined bending operation occurring setting parameters. A more precise, in particular individual bending portions adapted during the course of the bending operation setting of the curving device is possible if the curving device can be set during the defined bending operation corresponding to a plurality of setting parameters.

For example, the exactly corresponding to the passing on the bending operation the bending states of setting parameters are set by the controller.

In principle, it would be conceivable to determine the adjustment parameter characterized in that, starting from the workpiece data and the bending operation of the adjustment parameters is determined from a stored in the control table. Such an approach always brings inaccuracies with it.

The aforementioned object is also achieved alternatively or additionally to the above described embodiments of the inventive solution according to the invention that can be determined with the control of at least one setting parameter for a particular bending operation while performing this bending operation by a measurement.

Determining the at least one setting parameter by measurement is possible in different ways.

For example, it is conceivable to detect the linear posture of the bending beam tool by a measurement during the execution of the bending operation and the curving always be adjusted so that the linear orientation of the bending beam tool is maintained. In this case, the setting parameters are the part of the control by always taking place adjustment of the curving device so that the bending beam tool remains straightened, and determined at the same time he determining these parameter settings, a corresponding adjustment of the curving device.

An alternative solution to this provides that the controller for determining the at least one setting parameter comprises the bending of the bending beam carrier by means of at least one sensor during a measurement.

Determining the deflection of the bending beam carrier has the advantage that no measurement in the region of the bending beam tool, and in particular no measurement of the straightness of the bending beam tool, so that necessary during the bending operation so that the can detect at least one setting parameter during the bending operation particularly beneficial in this solution.

Regarding the type of detecting deflection of the bending beam carrier different possibilities are conceivable.

For example, it would be conceivable to detect the same deflection at several points of the bending beam carrier.

For simplicity, however, it has proved to be particularly advantageous if the at least one sensor detects the same, the deflection of the bending beam carrier at a single location. The detection of the deflection of the bending beam carrier would for example be possible via a strain gauge, which could be disposed on the extending side of the bending beam carrier.

For simplicity, however, it has proved advantageous if the at least one sensor detects the deflection of the bending beam carrier with respect to a reference position, so that the determination of the zero position, which is problematic in a strain gauge may be omitted.

With regard to the specification of the reference position range of solutions are also conceivable.

So it would be conceivable to predetermine the reference position by a light beam.

However, a particularly simple solution provides that the reference position is predetermined by a reference element.

Such a reference element can be provided in many different ways. One advantageous solution provides that the reference element is a erstreckter is parallel to the bending beam carrier reference carrier.

With regard to the operation of the sensor also has several variants are conceivable in the case of a reference element. it if at least one sensor detects a relative change in position of the bending beam carrier with respect to the reference carrier is particularly favorable. The deflection of the bending beam carrier can now be linked in many different ways with the to be determined setting parameters. A particularly advantageous because of the simplicity solution provides that the control determined based on the deflection of the bending beam carrier and one of the curving Verstellverhaltens the setting parameter for the curving device.

Regarding the way as the setting of the curving to be detected by the sensor, no further details have been made in connection with the previous explanation of the invention. So, an advantageous solution in that the controller detects the setting of the curving associated by means of at least one of the curving position sensor.

the position sensor of the curving device is preferably arranged while end.

It is particularly favorable when a position sensor is disposed at both ends of the curving, to determine its exact adjustment particularly.

With regard to the setting of the curving were no further details in connection with the previous explanation of the individual embodiments. So it is for example conceivable that the curving device can be set by means of the control during a bending operation corresponding to the setting parameters, wherein one of said adjustment parameters may also be determined during the bending operation or the setting parameter has already been determined prior to the bending operation.

This solution has the advantage that can be at least approximately realize the setting of the curving device that the curving device also provides an approximately straightened bending beam tool in the bending operation available to advantage.

As already stated in the introduction, it is in principle sufficient in the context of the inventive solution when the crowning is set upon completion of the bending operation so that the bending beam tool is straightened substantially, as this until the end of the bending operation possible in inaccuracies due to a temporary deflection of the bending beam tool can be compensated during the bending operation.

It is particularly advantageous if the control by driving the actuator according to the set during the conduct of the bending operation, the crowning to individual times adjusting deflection of the bending beam carrier.

it when the bowing device is adjustable by means of the control during the detection of the setting parameter corresponding to the adjustment parameters, so that a direct implementation of the setting parameter detected occurs in the setting of the curving is particularly favorable. For example, such a conversion of the setting parameter detected in the setting of the curving device is possible even when the setting of the setting parameter is carried out by a measurement of the straightness of the curving device.

Of course, this is also possible, however, if the detection of the setting parameter via the detection of the deflection of the bending beam carrier.

Alternatively, there is, particularly if the determination of the setting parameter is also done before the bending operation, the possibility that the curving device can be set to the at least one adjustment parameters before carrying out the defined bending operation.

It is particularly favorable, a solution in which the curving device can be set in every operating state corresponding to the adjustment parameters.

In conjunction with the preceding description of the individual functions of the control was stated that the control for the implementation of a defined bending operation the adjustment parameters for that particular bending operation while performing the same determined.

This does not necessarily mean that there is always at each implementation of the defined bending operation of at least one setting parameter must be determined in each case again. Thus, it is for example conceivable that the controller prior to performing another of the defined bending operations determines the at least one setting parameter of at least about.

That is, the at least one parameter in the course of performing a defined bending operation can be determined, this determined adjustment parameter but in this takes place a certain bending operation using not only for the setting of the curving, but also for others of the defined bending operations, so for example, in the production of additional identical parts with repeated implementation of the defined bending operation can be used.

This solution can in this further the defined bending operation, for example, the in the foregoing defined bending operation is determined at least one setting parameter at least to accelerate the setting of the curving use, since the adjustment of the curving device can be introduced on these approximate value already known from the general recognition of the setting parameter, and thus, would only have to compensate for the measurement in such a case, deviations from the approximate value and compensated by complementary modulation of the curving device.

More advantageously, however, it is when the controller prior to performing another of the defined bending operations least accurately determined the one adjustment parameters substantially as in this case, upon detection of the same at least one setting parameter could be used in at least one setting in the course of a bending operation in the further bending operations ,

Nevertheless, even with substantially exact determination of the at least one setting another measurement and checking the setting could still be done.

It has proven to be especially when the curving device can be preset by the controller prior to performing the defined bending operation.

With such a setting, a number of advantages can be achieved. An advantage would be that decreased by the preset value at least on a part of the at least one setting parameter of the response time of the curving device for the adjustment and thus can be carried out the setting of the setting parameter quickly and accurately.

Another advantage is to be seen in the fact that it is possible, in each case at one of the defined bending operations, namely the first of the defined bending operations to carry out the determination of the setting parameters and perform with these adjustment parameters, all others of the defined bending operations.

In a default setting, it is possible to set at least a part of the presumed value setting parameter, which part can be assumed value is smaller than the assumed setting parameter. In order, in particular in intensive force bending operations, to facilitate the setting of the curving, thus improving also their setting speed and adjustment precision, it is preferably provided that the curving device by means of the control is preset to a higher than an assumed setting parameter value and then to the set value during the is bending operation can be lowered.

This preference of the setting parameter over the supposed setting parameters beyond, that is, over this past values, has the advantage that it is possible, during use of the bending operation, the forces acting on the curving bending forces in addition to the generated by the actuator force to the curving to move, namely towards lower values ​​of the setting parameters, i.e. from higher-crown towards lower crown, so that so small adjustment forces required and the curving device can be set faster.

The excessive then at the start of the bending operation crowning is not detrimental, if it is ensured that the corresponding one of the deflection of the bending beam carrier crowning is set at the end of the bending operation.

With regard to the provision of such a setting parameter presumed wide variety of solutions are also conceivable. Thus, a particularly advantageous solution, that the presumed adjustment parameter is determined in such a manner by the controller that the detected after passing through a portion of an associated one of a bending operation the bending angle actual setting parameters is used.

It is particularly advantageous if the once for a bending operation specified at least one adjustment parameter in another of the defined bending operations is also used by the controller as setting parameters, since in this case only one or a few of the defined bending operations, the actual determination of the setting parameter, for example by takes place measure, and that a setting parameter can then be used in all others of the defined bending operations, and can save the time required for the measurement for determining the setting parameter.

For example, it would be possible with this solution to perform the defined bending operations slowly and during that be to determine at least one setting parameter, and then perform the others of the defined bending operations very quickly, as there is at least one setting parameter is determined already and always continues to use the can.

Other features and advantages of the invention are subject of the following description and the drawings illustrating one embodiment. In the drawing:

Figure 1 is a front view of a bending machine according to the invention with indicated curving device;

2 shows a section along line 2-2 in Figure 1;

3 shows an enlarged representation of a bending beam of the bending machine according to the invention with partially broken away portions for detecting the curving device and a reference beam;

Figure 4 is a view similar to Figure 3 with an essentially recognizable curving device;

5 shows an enlarged view of a portion A in Figure 4, and

Figure 6 in Figure 6a is a representation of a deflection of a bending beam carrier at a bending machine according to the invention in the course of a bending operation to a maximum bending angle;

6b shows an illustration of the setting parameters for the setting of the

Curving over the bend angle at different

Modes of operation. An embodiment of a bending machine according to the invention, shown in Fig. 1, comprises a machine frame 10 having lateral uprights 12 and 14 between which, as shown in Fig. 1 and 2, an upper beam 16 and a lower beam 18 extend.

For example, the lower beam 18 is fixed to the uprights 12 and 14 and the upper beam 16 movable relative to the lower beam 18th

Further, the upper beam carries a upper beam tool 20 and the lower beam, a lower beam tool 22, between which a workpiece 24 made of flat material, for example a metal sheet is clamped, that from this one on the upper beam tool 20 and the lower beam tool 22 projecting flaps 26 from a through the lower beam tool 22 and the upper beam tool 20 fixed clamping plane 28 is bendable out.

For this purpose, the bending machine with a bending cheek 30 is provided which extends between the ends thereof disposed bending beam holders 32 and using this bending beam holders 32 is pivotable about a pivot axis 34, the pivot axis 34 preferably above the clamping plane 28 and is parallel thereto.

The bending beam 30 acts with a bending beam tool 36 on the to be bent over tabs 26 of the workpiece 24, where the bending beam tool 36 is supported via a curving device 40 42der on a bending beam carrier bending beam 30, and the bending beam carrier 42 is provided to the forces acting on the bending beam tool 36 absorb forces and thereby to hold the bending beam tool 36 rigid. Ideally, the bending beam tool would be held in such a form-stable 36, that this be exactly parallel to the pivot axis 34 with its bent edge 44, regardless of the forces acting on the bending beam tool 36 reaction forces on bending of the workpiece 24th

the position of the section to be bent workpiece 24, and the section to be bent angle, a more or - because the bending beam 30 extends between the lateral uprights 12, 14 over long lengths, is carried out depending on the type of section to be bent workpiece 24 - in particular material thickness of the workpiece and the workpiece length less strong deflection of the bending beam carrier 42 and thus a corresponding deflection of the bending beam tool 36, provided that is not counteracted by the curving 40th to bend the curving device 40, via which the bending beam tool 36 itself is supported on the bending beam carrier 42 designed so that, as is apparent from Fig. 3 and 4, opens the possibility of the bending beam tool 36 opposite relative to the bending beam carrier 42 to its deflection and so that the deflection of the bending forces female bending beam carrier 42 to compensate so that the bending edge 44 of the bending beam tool 36 again substantially parallel to the pivot axis 34, which represents the bending line simultaneously extends.

For this purpose, as shown in Fig. 3 and 4, the curving 40 of successively arranged pairs of wedges 46! provided to 46 n, respectively 48b include a lower, fixed on the bending beam carrier 42 wedge body 48a, and an upper seated on this wedge body which rest slidingly with their mutually facing wedge surfaces 50a and 50b to each other. Furthermore varies for different wedge pairs 46! to 46 N, the wedge angle of the wedge surfaces 50a, b in such a way that the wedge angle n is the lowest in the past each external wedge pairs 46ι and 46 and increases steadily to a center line 52 down, so that when the one or more central pairs of wedges 46 x the 50a, b is inclination of the wedge surfaces is the greatest.

Further, the upper wedge body 48bιbis 48 are π in a longitudinal direction 54 of the curving device 40, which at the same time also corresponds to a longitudinal direction of the bending beam 30, against the lower wedge bodies 48aι to 48a n, and a 36 and the upper wedge bodies 48bι to 48b n disposed bending beam tool receiving means between the bending beam tool 56 displaceable, wherein each bear in the longitudinal direction 54 consecutive upper wedge member 48b to each other, so that all the upper wedge body 48b are movable simultaneously and the same distance in the longitudinal direction 54th

Due to the different angle of inclination of the wedge surfaces 50a, b of the wedge pairs 46ι to 46 π causes a shift of the upper wedge body 48b near the center line 52 of the curving device 40 a stronger deflection of the bending beam tool 36 in the direction of the bending beam carrier 42 away than in the region of the outer wedge pairs 46ι and 46 n, as shown in Fig. 4.

By such adjustment of the curving device 40 is possible, varying degrees of bending of the bending beam carrier 42 in the direction of the pivot axis 34 to compensate away in a corresponding manner to different degrees by the curving device 40, so that approximately the bending edge 44 can be adjusted so that they approximately parallel to the pivot axis 34 and thus extends also to the bending line.

It is thus possible to compensate depending on the occurring at different bending operations bending forces, the deflection of the bending beam carrier 42 is substantially.

To adjust the curving device 40 is a designated as a whole with 60 adjusting device is provided, which 46ι and 46 n assigned to hydraulic cylinder 62 and 64 comprises the respective end pairs of wedges, which act via pressure bodies 66 and 68, the respective upper wedge body 48bι and 48b n, where each one of the hydraulic cylinder 62 is effective or 64th

If, for example, the upper wedge member 48b are displaced in the direction of the hydraulic cylinder 64, the hydraulic cylinder 62 is effective, the upper wedge member to be displaced in the direction of the hydraulic cylinder 62 48b, the hydraulic cylinder 64 is effective.

For driving and operating the two hydraulic cylinders 62 and 64, the actuator 60 is also provided with a hydraulic drive 70, via which the two hydraulic cylinders 62 and 64 are controlled with hydraulic medium can be acted upon.

The hydraulic control 70 corresponds to a controller 72 for the bending machine. In order to determine the correct setting parameters for the curving device 40, in the illustrated embodiment, the controller 72 is able to detect the deflection of the bending beam carrier 42nd

Preferably, the bending beam carrier 42 is formed as a hollow body, so that it is possible to arrange in the bending beam carrier 42 a reference carrier 80, which also extends essentially in the longitudinal direction 54 of the bending beam carrier 42 along the length thereof and in the region of its two ends 82 and 84 of the bending beam carrier is held near its associated with the bending beam holders 32 end portions 86, 88 42nd

The reference beam 80 in this case runs within the bending beam carrier 42 such that it is not subjected to any stress and therefore also not the same with the bending beam carrier 42 under load during a bending operation, may deflect.

The reference beam 80 is thus a geometrical reference against which the deflection of the bending beam carrier is determined 42nd

For this purpose, a service associated with this first sensor 90 is provided preferably in the region near the centerline 52 in the bending beam carrier 42, which is connected for example via a bracket 92 to the bending beam carrier 42nd

The first sensor 90 thereby detects a distance between the latter and a bottom edge 94 of the reference beam 80, which distance with increasing deflection of the bending beam carrier 42 becomes increasingly larger, so that the detected from the first sensor 90 distance from the bottom edge 94 of the maximum deflection of the bending beam carrier 42 corresponds.

The controller 72 connected to the first sensor 90 thus provides a measure of the maximum deflection of the bending beam carrier 42 under the influence of bending forces on the bending beam tool 36th

Accordingly, the temperature measured by the first sensor 90 maximum deflection, the controller 72 is able to determine setting parameters E for the curving device 40 and to drive the hydraulic control 70 accordingly so that the appropriate hydraulic cylinder is supplied with hydraulic medium 62 or 64th

In order to recognize the extent to which a displacement of the upper wedge member 48b by the hydraulic cylinders 62 or 64, the respective outermost upper wedge bodies are associated 48bιund 48b n second sensors 100, the 48bι and 48b each n is a position of the outermost upper wedge body relative determine a fixture 102 which the same is fixed relative to the bending beam carrier 42, preferably an end region 86 and 88 respectively arranged.

By means of the second sensors 100 is thus for the controller 72 to recognize the possibility that the adjusting means has adjusted 60, the curving device 40 according to the predetermined setting parameter E. The assignment of the respectively required for the setting of the curving 40 setting parameter E to the corresponding deflection D of the bending beam carrier 42 can be in the framework of a calibration process in which each of the straight direction of the bending beam tool is achieved at different loads 36, fixed and in the controller 72 in form of a table are stored.

Thus, the controller is able to determine 42 corresponding setting parameter E for the curving device 40 at autogenous different deflections D of the bending beam carrier in which the curving device 40 so acts on the bending beam tool 36, that this straight line with the bending edge 44 substantially parallel to the pivot axis 34 and thus extends parallel to the bending line.

The setting of the curving device 40 can be effected in different operational modes, as shown in Fig. 6.

In Fig. 6a here is the deflection D of the bending beam carrier 42 in response to a bending angle W, that is a swivel angle about the pivot axis 34 is shown.

This results in that when bending to an angle of for example 90 °, the deflection D first approximately linearly increases in a first bending angle range Bl with the bending angle W and then, for example, at a bending angle W of about 4 ° in a second bending region B2 passes, in which with increasing bending angle W only a small amount of approximately linear increase in the deflection D of the bending beam carrier 42 with increasing bending angle W. The transition from the bend portion to the bending portion Bl B2 is due to that when the Fiießgrenze of the material of the workpiece 24 is exceeded, the forces acting on the bending beam tool 36 only slightly increase with increasing bending angle W.

According to the shape of the deflection D across the bend angle W is now the controller 72 may set different setting parameters.

As shown in Fig. 6b by the curve 0, E can be the following set exactly the profile of the deflection D by the controller 72 in a first operating mode of the setting parameters, if the control device 60 operates at sufficiently high speed in order to in a quick passage through the bending angle W 40 to achieve a correspondingly fast readjustment of the curving.

Since this is difficult in many cases, takes place in a second mode of operation at least during the bending portion Bl, the setting of the setting parameter E with a certain delay, or some following error, as shown by curve 1 in Fig. 6b, so that the e reaches the setting parameters of the respective deflection D in the bending region B2 values ​​until a bending angle W of approximately 5 °, but then, up to the maximum bending angle of the adjustment parameters W e of deflection D follows.

Such lag error has no serious adverse effects on the precision of the bending operation, provided that the deflection D of the bending beam carrier 42 corresponding setting parameters E until the end of the bending operation achieved as yet upon completion of the bending operation the bending beam tool 36 is corrected for its deflection and thus the bent tabs 26 at the end of the bending operation is bent in such a way as when the setting parameter e would have been exactly the same continuously adjusted using the deflection D of the bending beam carrier 42nd

A specification of the setting parameter E in the first operating mode corresponding to the curve 0 or in the second operating mode of the curve 1 in Figure 6b. Is usually carried out when the particular bending operation was carried out by the bending machine for the first time, since in such a case, usually, the controller 72 no does present reference values ​​for which adjusting deflection D of the bending beam carrier 42nd

In general, however, bending operations are not only carried out once in the inventive bending machine, but the same specific bending operation is repeatedly performed each on a new workpiece 24th

In this case, the controller 72 are maximum values ​​for the setting parameter E in this bending operation already under the previous bending operations.

the controller 72 make already before the start of the bending operation, a default setting of the curving device 40 having a setting parameter E, which lies below the maximum value - for that reason, in a third mode of operation - represented by the curve 2 as shown in Figure 6b.. This setting parameter E is so long maintained as a constant value until a result of the deflection D of the bending beam carrier 42 of this setting parameter E is reached and subsequently adjusted by further increasing the deflection D, in this respect also being possible for even a following error may occur which, however, B2 rapidly in the bending area reduced, so that corresponding to the end of the bending operation of the setting parameters e of the self-adjusting deflection of the bending beam carrier 42nd

As such, the adjustment of the curving device 40 upon the occurrence of a large bending forces that the crown increases gradually in the course of the bending operation, that is, 52, the distance between the bending beam carrier 42 and the bending beam tool 36 progressively increased in the region of the center line, a high force by the actuating device 60 is required, is represented by the curve 3 in Fig. 6b in a fourth mode of operation, provided that the curving device 40 is preset by a setting parameter e so that the crown is greater than the necessary crowning. Starting with the bending operation, the crown of the curving device 40 is then withdrawn until one of the deflection D of the bending beam carrier optionally slightly adjusted value corresponding to 42 and still in the bending region B2. This solution has the great advantage that the required in the bending area Bl large forces can be avoided for the adjustment of the camber of the curving 40 without the precision of the bending operation suffers because at the end of the bending operation continues to be the setting parameter E of deflection D of the 42 corresponds to the bending beam carrier. Unless the magnitude of the present at the end of the bending operation setting parameter E is known to the controller, the setting of the adjustment paramters E also at a first bending a workpiece 24 in accordance with a defined bending operation according to the third and fourth mode of operation, that is, corresponding to curve 2 or . 3 of Fig. 6b, take place.

If the control 72, the final value of the adjusted adjustment parameter E from a previous bending operation is known, can be completely dispensed 42 and the final value of the setting parameter E detected at a first bending operation in the subsequent bending operations also during subsequent bending operations on the determination of the deflection D of the bending beam carrier fixed be adjusted, as can be seen in a fifth operating mode, in Fig. 6b represented by the curve 4.

Claims

PATE NTANSPRÜCH E
1. Bending machine are movable comprising both maintained a machine frame (10), an upper beam (16) and a lower beam (18) on the machine frame (10) and relative to each other, held one at the machine frame (10) and (relative to this as well as to upper beam 16) and lower beam (18) movable bending jaw (30) (with a bending beam carrier 42) and one (on the bending beam carrier 42) controllable via a (by a controller 72) curving device (40) supported on the bending beam tool (36), dad u rch in that provided the curving device (40) having an operable during a bending operation actuator (60), in that the controller (72) the adjusting device (60) is controlled also during a bending operation, that associated with at least one of the controller (72) sensor (100) is provided, with which from the controller (72) an adjustment of the curving device (40) can be determined by the adjusting means (60), and that for a certain Biegeope ration by the controller (72) at least one setting parameter (E) for the curving device (40) is determinable, wherein the bending beam tool (36) is substantially deflection-free aligned at the end of this bending operation.
2. Bending machine according to claim 1, characterized in that the at least one setting parameter (E) is the maximum occurring during the defined bending operation setting parameters (E).
3. Bending machine according to claim 1 or 2, characterized in that the curving device (40) during the defined bending operation corresponding to a plurality of setting parameters (E) is adjustable.
4. A bending machine according to the preamble of claim 1 or according to one of the preceding claims, characterized in that the controller (72) of the at least one setting parameter (E) for a particular bending operation while performing this bending operation can be determined by a measurement.
5. Bending machine according to one of the preceding claims, characterized in that the controller (72) for determining the at least one setting parameter (E) detects the deflection of the bending beam carrier (42) by means of at least one sensor (90) during a measurement.
6. Bending machine according to one of the preceding claims, characterized in that the at least one sensor (90) detects the same in a single location, the deflection of the bending beam carrier (42).
7. A bending machine according to claim 5 or 6, characterized in that the at least one sensor (90) detects the deflection of the bending beam carrier (42) relative to a reference position (94).
8. A bending machine according to claim 7, characterized in that the reference position (94) is predetermined by a reference element (80).
9. A bending machine according to claim 8, characterized in that the reference element is extending parallel to the bending beam carrier (42) reference carrier (80).
10. A bending machine according to claim 9, characterized in that the at least one sensor (90) detects a relative position change of the bending beam carrier (42) relative to the reference carrier (80).
11. Bending machine according to one of claims 5 to 10, characterized in that the controller (72) starting from the deflection (D) of the bending beam carrier (42) and a Verstellverhaltens of the curving device (40) the setting parameters (E) (for the curving device 40 ) is determined.
12. Bending machine according to one of the preceding claims, characterized in that the controller (72) associated with the adjustment of the curving device (40) by means of at least one of the curving device (40) position sensor (100) detected.
13. Bending machine according to one of the preceding claims, characterized in that the curving device (40) by means of the controller (72) during a bending operation corresponding to the setting parameter (E) is adjustable.
14. A bending machine according to claim 13, characterized in that the controller (72) by driving the actuator (60) adjusts the curving device (40) according to during the execution of the bending operation to individual times-adjusting deflection (D) of the bending beam carrier (42) ,
15. Bending machine according to one of the preceding claims, characterized in that the curving device (40) by means of the controller (72) during the recording of the setting parameter (E) in accordance with the setting parameter (E) is adjustable.
16. Bending machine according to one of the preceding claims, characterized in that the curving device (40) before carrying out the defined bending operation on the at least one setting parameter (E) is adjustable.
17. Bending machine according to one of the preceding claims, characterized in that the curving device (40) in any operating state corresponding to the setting parameter (E) is adjustable.
18. Bending machine according to one of the preceding claims, characterized in that the controller (72) prior to conducting another of the defined bending operations the at least one setting parameter (E) is at least approximately determined.
19. Bending machine according to one of the preceding claims, characterized in that the controller (72) prior to conducting another of the defined bending operations the at least one setting parameter (E) is substantially determined accurately.
20. Bending machine according to one of the preceding claims, characterized in that the curving device (40) by means of the controller (72) is pre-set prior to performing the defined bending operation.
21. Bending machine according to claim 20, characterized in that the curving device (40) by means of the controller (72) lying on a on a suspected setting parameter (E) value can be preset, and then the actual setting parameter (E) during the bending operation can be lowered.
22. Bending machine according to one of the preceding claims, characterized in that the presumed setting parameter (E) by the controller (72) is so determined that the detected after passing through a portion of an associated one of a bending operation the bending angle actual setting parameter (E) is used.
23. Bending machine according to claim 20, characterized in that the once for a bending operation set at least one setting parameter (E) during others of the defined bending operations continue from the controller (72) as the setting parameters (E).
EP20030740348 2002-09-26 2003-06-26 Bending machine Active EP1542816B8 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP10245777 2002-09-26
DE2002145777 DE10245777A1 (en) 2002-09-26 2002-09-26 A bending machine for metal sheets has an interchangeable bending tool mounted on a number of wedge blocks by which fine adjustment may be made
EP20030740348 EP1542816B8 (en) 2002-09-26 2003-06-26 Bending machine
PCT/EP2003/006731 WO2004033125A8 (en) 2002-09-26 2003-06-26 Bending machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20030740348 EP1542816B8 (en) 2002-09-26 2003-06-26 Bending machine
ES03740348T ES2305478T3 (en) 2002-09-26 2003-06-26 folding machine.

Publications (3)

Publication Number Publication Date
EP1542816A1 true true EP1542816A1 (en) 2005-06-22
EP1542816B1 EP1542816B1 (en) 2008-05-21
EP1542816B8 EP1542816B8 (en) 2008-12-24

Family

ID=31984320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030740348 Active EP1542816B8 (en) 2002-09-26 2003-06-26 Bending machine

Country Status (7)

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US (1) US7234332B2 (en)
EP (1) EP1542816B8 (en)
JP (1) JP2006500224A (en)
DE (2) DE10245777A1 (en)
DK (1) DK1542816T3 (en)
ES (1) ES2305478T3 (en)
WO (1) WO2004033125A8 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4828521B2 (en) * 2005-03-08 2011-11-30 パイオニア株式会社 Information recording apparatus and method, and computer program
DE102008025351A1 (en) 2008-05-27 2009-12-03 Hans Schröder Maschinenbau GmbH forming machine
WO2011002420A3 (en) 2009-07-02 2011-02-24 Filip Osvald Sheet metal bending machine
NL2006854C (en) * 2011-05-26 2012-12-05 Wila Bv Method and apparatus for compensating for defects in a deforming operation between two beams of a press.
CN102581084B (en) * 2012-01-16 2014-05-07 滕州市三合机械股份有限公司 Magnetic and hydraulic composite numerical control bending machine
WO2013149984A1 (en) * 2012-04-03 2013-10-10 Durmazlar Makina Sanayi Ve Ticaret Anonim Sirketi Press brake with an oil deflection compensating mechanism
CN102716946B (en) * 2012-06-18 2014-07-02 天津力神电池股份有限公司 Bending device
JP1539124S (en) * 2014-08-15 2015-11-30
USD755861S1 (en) * 2014-08-15 2016-05-10 Trumpf Gmbh + Co. Kg Bending machine

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FR2507507B1 (en) * 1981-06-16 1986-07-04 Promecan Sisson Lehmann Device for bending a tool holder of a bending press or the like
FR2597398B1 (en) * 1986-04-16 1990-12-07 Favrin Pierre press brake has swivel deck
JPH072088Y2 (en) * 1988-11-15 1995-01-25 株式会社小松製作所 Bending machine tool position control device
DE3935659C3 (en) * 1989-10-26 1997-01-02 Reinhardt Gmbh Maschbau An apparatus for bending a metal sheet
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Also Published As

Publication number Publication date Type
ES2305478T3 (en) 2008-11-01 grant
WO2004033125A1 (en) 2004-04-22 application
EP1542816B8 (en) 2008-12-24 grant
JP2006500224A (en) 2006-01-05 application
EP1542816B1 (en) 2008-05-21 grant
US20050160781A1 (en) 2005-07-28 application
US7234332B2 (en) 2007-06-26 grant
DK1542816T3 (en) 2008-09-08 grant
WO2004033125A8 (en) 2004-07-22 application
DE10245777A1 (en) 2004-04-08 application
DE50309893D1 (en) 2008-07-03 grant

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