EP3030359B1 - Presse à plier - Google Patents

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Publication number
EP3030359B1
EP3030359B1 EP14780580.8A EP14780580A EP3030359B1 EP 3030359 B1 EP3030359 B1 EP 3030359B1 EP 14780580 A EP14780580 A EP 14780580A EP 3030359 B1 EP3030359 B1 EP 3030359B1
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EP
European Patent Office
Prior art keywords
tool
bending
sensor device
stop
tools
Prior art date
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Active
Application number
EP14780580.8A
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German (de)
English (en)
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EP3030359A1 (fr
Inventor
Lars WOIDASKY
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.)
Bystronic Laser AG
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Bystronic Laser AG
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Publication date
Application filed by Bystronic Laser AG filed Critical Bystronic Laser AG
Priority to EP14780580.8A priority Critical patent/EP3030359B1/fr
Publication of EP3030359A1 publication Critical patent/EP3030359A1/fr
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Publication of EP3030359B1 publication Critical patent/EP3030359B1/fr
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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
    • 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
    • B21D5/002—Positioning devices
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/22—Auxiliary equipment, e.g. positioning devices
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003—Positioning devices
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/26—Stops
    • 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
    • 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
    • B21D5/0209—Tools therefor
    • 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
    • B21D5/0281—Workpiece supporting devices

Definitions

  • the invention relates to a bending press according to the preamble of claim 1 and a method for bending a workpiece with a bending press according to claim 6.
  • the tool selection and arrangement in bending presses also called press brakes or bending machines, is done to a high degree manually and only partially supported by the machine control.
  • a bending plan is created, which calculates the product-specific upper and lower tools as well as their theoretical position.
  • the tools can be placed in positions that do not correspond to the process and have a potential risk.
  • JPH0952124A discloses a bending machine with upper and lower tools, a stop and a barcode reader which is arranged on the stop.
  • the upper and lower tools are each provided with a barcode on the back, which can be read by the barcode reader.
  • the barcode contains information about the nature of the tool. This information are transferred to an NC control.
  • a touch sensor or limit switch is provided on the stop with which the dimensions of the respective tool can be determined. Such a procedure is complex and time-consuming since the touch sensor has to be moved directly to the tool several times and in different positions.
  • the WO2012 / 103565A1 discloses a method for loading a bending press with a bending tool.
  • a controlled handling device with a gripper is used for the bending tool.
  • a control device generates control commands in order to move the tool from an ACTUAL position to a TARGET position when it is introduced into the tool holder. Only when the tool has reached the TARGET position is it inserted into the tool holder and fixed there.
  • the tools held by the handling device must be approached directly from the (back) stop in order to determine their actual position.
  • the process is complex and is based on the basic principle that the tools have to take an exact position within the tool holder so that the desired bending plan can be carried out.
  • the EP0919300B1 (or. DE69736112T2 ) discloses a bending machine in which the upper tools are provided with bar codes.
  • a guide for a scanner for reading the bar codes is provided in the Z direction on the side facing the operator.
  • a linear scale for example a magnetic scale, is arranged as a position detection device on this tool clamp on the side facing the operator.
  • the position data of the upper tools captured by the scanner are saved and made available again later in a display.
  • the operator has to position the tools by hand based on the stored data exactly according to the stored position.
  • This bending machine is also based on the basic principle that the tools have to take an exact position within the tool holder so that the desired bending plan can be carried out.
  • the exact positioning and adjustment of the tool position requires a lot of time and personnel.
  • the EP1517761B1 and the DE602005005385T2 refer to special tools and tool holders, which can detect tool positions relatively imprecisely via sensors. It is sometimes not possible to classify tools qualitatively and geometrically. Another disadvantage is the high cost of the necessary peripherals, the maintenance intensity, the need to purchase new punches and dies and their restricted geometry. Due to the sensor technology incorporated in the machine and tool, limited pressing forces can still be expected. In addition, movable sensors on the upper and lower beams, as well as the necessary data and supply cables, reduce the variability of a press brake. The number of possible bent parts is restricted.
  • the EP1510267B1 (or. DE69736962T2 ) discloses a method for displaying a tool arrangement in a press brake. Based on a displayed diagram, it is determined whether the planned bending process is also possible. Subsequently, further tools for certain bend line sections are added and the process is repeated with the new constellation. Just like the previous methods, this method requires exact positioning of the tools in the tool holder.
  • the DE3830488A1 discloses an electronic tool detection system for press brakes. With this system, it is possible with the help of an electronic control to recognize the built-in tool geometry, to protect the tools against overloading and to keep the operator safe.
  • the DE4442381A1 relates to a device for position and shape detection of upper cheek tools on folding machines and press brakes. Behind the top beam there is a motor-driven slide in a guide on which a holder for a laser light barrier is mounted. With this, the length of the built-in upper beam tools and their gaps are determined. The values are represented numerically and graphically. In addition, there is a read / write head in the holder, which reads the codes on the back of the upper beam tools.
  • the object of the present invention is therefore to eliminate the disadvantages of known solutions and to provide a bending press in which an exact positioning of the upper tool and lower tool is no longer necessary. Nevertheless, the entire bending process, including the positioning of the workpiece relative to the tools, should be reliable and deliver bent parts exactly according to the bending plan.
  • the sensor device is designed for contactless detection of the position or the position and type of the upper tool and the lower tool within the bending press and the control device is designed to, depending on the position or position and type of the upper tool and the lower tool detected by the sensor device Movement process with which the at least one stop is positioned relative to the tools to adapt.
  • An important advantage of the invention is that the tools no longer have to be positioned exactly within the tool holder when loading the bending press. This can save time and manpower.
  • the invention is based on the principle that the tools (or their position within the tool holder) are not adapted to the bending plan, but that the movement processes of the at least one stop at the position of the upper and lower tools within the bending press or within the respective one Tool holder can be adjusted. This creates a highly flexible system that automatically regulates the movement processes of the stop required before and during the bending process.
  • the position of the tool already inserted in the tool holder relative to (or in the) tool holder is recorded.
  • the movement processes with which the stop (s) e.g. back stops
  • the stop (s) e.g. back stops
  • a 'non-exact' insertion of the tool into the tool holder or an insertion at a completely different location is thereby automatically 'compensated' or taken into account.
  • Any position of the upper and lower tool in the tool holder leads to an automatic adjustment of the stop control and to a correct bending result.
  • a bending program is stored in the control device, which takes into account the position data of the upper and lower tool detected by the sensor device as an input variable and, depending on this input variable, generates control commands for the drive of the stop as an output variable.
  • “Movement process of the stop” or “method of the stop” is understood to mean any conceivable movement of the stop, in particular also its stop elements such as stop fingers and the like.
  • the contactless sensor device in particular in the form of a camera, it would also be possible to detect a plurality of tools distributed along the Z axis and inserted in the tool holder.
  • An automatic determination of the gap width between two adjacent upper or lower tools would also be conceivable. If the detection area of the sensor device is large enough, all tools can be held in a single receptacle. With smaller ones The camera can be moved so that the individual tools are captured one after the other along the Z axis.
  • the detection of the tool data by means of the sensor device can initially take place independently of the position or at all of the presence of a (back) stop.
  • a stop could therefore only be installed or used after the step of detection.
  • other or additional tool data could also be recorded, which are not used to correct the stop, but are used for other purposes.
  • the at least one stop for positioning the workpiece is preferably a back stop, which can be moved parallel to the bending line, and the sensor device is arranged in the region of the back stop. At this point, the detection area of the sensor device is not disturbed by operating personnel and workpieces to be inserted. This arrangement of the sensor device also does not restrict the working range of the bending press. The sensor is also well protected and, due to its arrangement, can provide reliable images of the back of the tools.
  • the sensor device is preferably on the stop, e.g. on the backgauge, arranged and, together with the stop, preferably movable parallel to the bending line.
  • the travel axis of the stop e.g. Back gauge, is used in two ways.
  • other directions of movement of the stop can also be controlled according to the invention (adapted to the position of the tools).
  • the (back) stop could e.g. be movable in three different spatial directions.
  • the arrangement of the sensor device in particular in the form of a reading head or a camera, on the guide of the backgauge or directly on it offers the following advantages: simple arrangement; no additional interference contours on the outside of the machine; no hindrance to the bending process or personnel; the exterior appearance of the machine does not change for the user; the sensor device can be easily retrofitted and also allows the upper tool (punch) and lower tool (die) to be read simultaneously; the sensor device is protected from contamination; several tools along the Z axis can be recognized at the same time; and the Sensor device can be positioned as required. In addition, the position of the tools could also be calculated from the reference position of the backgauge along the Z axis.
  • the sensor device can preferably be moved into a position in which the detection area of the sensor device at least partially includes both the upper tool and the lower tool. As a result, all the necessary data can be acquired by means of a measurement process or a single image acquisition. Due to the large detection area, only one sensor device is required.
  • the sensor device comprises at least two non-contact, in particular optical sensors with different spatial detection areas.
  • the method of a sensor e.g. along the bending line, can be omitted.
  • the detection areas of the sensors can overlap.
  • the bending press comprises an operator interface, in particular in the form of a screen, sensor data from the sensor device and / or data derived from the sensor data can be displayed on the operator interface (or automatically output on the operator interface during operation). It is preferred if the sensor device comprises at least one camera and the images or image sequences recorded by the camera are displayed on the screen for the operator.
  • the sensor device is preferably a camera, particularly preferably a matrix camera. This means that not only codes or scales can be recorded, but - especially if they are missing - the tool itself and its contours. A large amount of different information can therefore be acquired with a single measurement / image recording.
  • a scale or a position marker is preferably applied to the upper tool and / or the lower tool and / or the respective tool holder. This enables a reliable and exact determination of the relative position from tool to tool holder.
  • a two-dimensional code in particular a data matrix code, is preferably applied to the upper tool and / or the lower tool, the code preferably containing information about the tool used, in particular about the type and dimensions of the tool.
  • Data matrix codes have several advantages for this application, for example they allow the codes to be read at an angle. As a result, codes from upper tools and lower tools can be evaluated at the same time, provided the camera has a correspondingly large reading window. It is also possible to affix the code on sloping surfaces. Furthermore, this type of coding allows a relatively large error tolerance, i. H. if damaged, the code is still recognized. As already mentioned, even the smallest code dimensions can be read from a relatively large distance.
  • a code is advantageously applied to the front and the back of the tools in order to enable the corresponding tool to be detected even when the tool is rotated (mirrored insertion).
  • a travel path of the stop parallel to the bending line is preferably calculated during the step of adapting the movement process.
  • the stop is, so to speak, 'tracked' the tool.
  • the traversing path is the output variable here, while the position data of the tools represent the input variable of the bending program.
  • the sensor device Before and / or during the step of detecting the position or the position and type of the upper tool and / or lower tool, the sensor device is preferably moved parallel to the bending line. As a result, tools can be positionally recorded along the entire length of the bending press.
  • the position or position and type of the upper tool and the position or position and type of the lower tool are preferably recorded simultaneously.
  • the detection range of the sensor device includes both the upper tool and the lower tool or, if appropriate, also their tool holder.
  • the position of the upper tool and / or lower tool is preferably detected using a scale or position marker applied to the upper tool and / or the lower tool and / or the respective tool holder. This increases the accuracy of the position detection.
  • the size and shape of the tools can also be recognized in relation to the scale or at a distance from the camera.
  • the position or position and type of the upper tool and / or lower tool is preferably detected by a contour detection of the tool.
  • the position of the tool for example in relation to the (known) position of the sensor device, can be determined here independently of aids such as scales or codes.
  • the camera is able to trace the contours of the tools used recognize and compare with (eg in the control device) stored data. If no data is stored or there is no code at all, the tools are identified based on their geometry and assigned accordingly.
  • the method preferably comprises a step of reading out information from a two-dimensional code applied to the upper tool and / or the lower tool, in particular a data matrix code.
  • a data matrix code also enables the marking of extremely narrow tools.
  • the present invention also enables the simultaneous recognition of several codes.
  • the distance to the tools can be changed by connecting the camera to the backgauge. Depending on the resolution of the camera, several codes and contours can be recognized at the same time.
  • the present idea is based on the fact that the tools used are recognized in their position (optionally also in their type). The parameters determined from this are used via the machine control in such a way that the periphery of the machine is adapted to the bending process at hand.
  • z. B. to call the backgauge, it is then positioned in relation to the tools.
  • the upper tool (punch) and lower tool (dies) are recognized simultaneously.
  • the position of these tools relative to one another can be safety-relevant and important for the quality of the bend.
  • safety-relevant means that an incorrectly positioned upper tool can lead to a collision.
  • a control corresponding to the bending process is carried out between the upper and lower tools. This prevents incorrect assembly.
  • the invention also relates to the determination of the type of tool and the tool position of all upper tools (bending dies) and all lower tools (dies) within a bending press or bending machine.
  • 2D codes preferably data matrix codes
  • a reading head should be used to determine the type of tool (including all its descriptive parameters) and the exact Z-direction position in the bending press.
  • the reading head preferably a matrix camera
  • the reading head is attached to a Z axis of the back stop of the bending press, as a result of which it is automatically adjustable. Due to the relatively small dimensions of this camera and an existing cable chain on the axis, both installation and data transmission can be easily implemented.
  • a specific data matrix code is applied to each tool to describe the parameters.
  • This code stores, for example, a simple number, which can be assigned in the database with the necessary parameters of the tool. These include, for example: geometry, maximum load, material, number of bending cycles that have already been carried out, wear, etc.
  • simple numbers By means of a description using simple numbers, the data matrix codes can also be produced in the smallest version and thus enable application to extremely narrow tools ( Stamps and dies).
  • a possible process could look like this.
  • the upper tool (punch) and lower tool (dies) are clamped and are now fixed in their position.
  • the (matrix) camera then moves with the Z axis over the entire length of the bending press.
  • images of the tools are generated and evaluated via the machine control and database.
  • the detection of the position of the tools used enables or simplifies a simple scale - attached to the tool clamp of the machine - preferably directly at or at the same height of the data matrix code.
  • the scale is then part of the generated image and thus allows a precise position determination.
  • the camera used can visualize the (rear) stop area. It is often difficult to position metal sheets precisely on the backgauge fingers, since the installation height of the bending press is too low or the tools used have a view of the backgauge fingers prevent.
  • the camera image which represents the backgauge area, can be transferred to a screen visible to the operator.
  • Correction values relating to the positioning of the upper tool and / or lower tool can be transferred to the control or the user interface (e.g. screen) in order to indicate to the operator that the tools are not in alignment and the position of at least one tool must be corrected.
  • the bending process or the setting-up process is preferably terminated if the position or position and type of the upper tool and / or lower tool detected with the sensor device is incorrect. In the case of incorrectly placed or incorrectly dimensioned tools, damage to the machine or dangers to operating personnel due to tool breakage can be excluded in this way.
  • the method preferably comprises a calibration of the position of the stop, the calibration preferably being carried out by means of a preferably optical position mark which is attached to a component of the bending press or to a reference tool.
  • the (back) stop can be calibrated in the X, R and Z directions by means of an optical reference (position marking) on the upper beam, on the tool clamp, within the bending press or by means of a reference tool, so that the (back) ) Stop by hand can be omitted if the stop has been adjusted due to improper use.
  • the workpiece to be bent is preferably provided with a readable code, which contains a reference to an associated bending program, and that after reading out the code, the associated bending program is preferably loaded and / or processed automatically in the control device with the sensor device.
  • a loading of the bending program associated with the bent part into the control can thus be carried out on the basis of a code on the bent part (bent or sheet metal blank) in which the associated bending program is encoded. done automatically.
  • the code is, for example, applied to the bent part with a laser.
  • the operator holds the sheet in front of the sensor device, for example a camera, and the control automatically loads the corresponding bending program.
  • the code can also be read out when the bent part is positioned on the stop, advantageously automatically by the sensor device.
  • the sensor device is preferably a camera and the images or image sequences recorded with the camera are displayed on an operator interface.
  • the transfer of the live camera image to the control or the operator interface enables the operator to be shown the current situation within the bending press.
  • the sensor device can also measure the deflection of the upper and lower cheeks.
  • the upper and lower cheeks undergo a deflection that can be compensated for by crowning cylinders.
  • the crowning is calculated in the control on the basis of theoretical values and is to be calculated in the future on the basis of the real state recorded by the sensor device. This enables a higher accuracy to be achieved in the bent part.
  • the sensor device can also be designed to detect the (sheet) thickness of the inserted (sheet) workpiece. If the workpiece corresponds to the entered data in the control device (machine control) or the corresponding values move within the defined tolerance range, the bending process can be started or continued, otherwise the bending process can be interrupted or interrupted.
  • workpiece or bent part dimensions can be recorded with the sensor device, which enables improved operator guidance.
  • the subject method also includes the creation of thermographic images of the bending press or parts thereof. This is preferably done by means of at least one IR sensor or at least one thermal imaging camera, which can be arranged within the bending press.
  • This enables the various heating conditions of the bending press (e.g. the tools, the machine frame, etc.) to be monitored and evaluated.
  • the machine body may expand indefinitely as a result of the heating, which leads to displacements of important reference points and thus to poorer bending results.
  • a critical factor is a machine body that is not fully warmed, i.e. local temperature differences, such as may occur directly after the bending press is switched on. With the help of the thermographic state images, individual reference axes can compensate for the occurring displacements and thus ensure a constant bending quality.
  • Fig. 1 shows a bending press 1 for bending workpieces, with an upper tool 2 (punch) and a lower tool 3 (die), a tool holder 4, in which the upper tool 2 is inserted, and a tool holder 5, in which the lower tool 3 is inserted.
  • the length of the tool holder 4, 5 along the Z-axis, ie parallel to the bending line, is so great that several upper and lower tools 2, 3 can be inserted and fixed side by side in the tool holder 4, 5. This case is in Fig. 6 shown where two lower tools 3 sit in the tool holder 5.
  • the upper tool 2 and the lower tool 3 can be fixed in different positions within the respective tool holder 4, 5. I.e. the tools can be arranged differently relative to the respective tool holder in the direction of the Z axis.
  • the bending press 1 has at least one stop 6 for positioning the workpiece 14 ( Fig. 2 ) within the bending press 1, the stop 6 by means of a control device 13 (in Fig. 8 shown) driven drive 9 is movable relative to the tools 2, 3.
  • This movability relates in particular to a movability along the Z axis, however, is Movability in other - in particular perpendicular - spatial directions is also conceivable.
  • the embodiment from Fig. 1 shows two stops 6, which can be moved independently of each other.
  • the present exemplary embodiment is a backgauge, that is to say a stop which, seen from the operator side of the bending press 1, is arranged behind the tools 2, 3.
  • the stop 6 serves a workpiece 14, for. B. to position a sheet to be bent, relative to the tools 2, 3.
  • the back gauge can be moved parallel to the bending line (along the Z axis).
  • the sensor device 8 is arranged on the backgauge and can be moved together with the backgauge parallel to the bending line.
  • the senor device 8 could be independent, e.g. B. sitting in its own holder, be movable from the backgauge.
  • the sensor device is preferably arranged in the region of the backgauge.
  • the stop 6 comprises stop fingers 7 which are additionally movable.
  • a sensor device 8 based on the contactless measuring principle, in particular in the form of a camera.
  • the sensor device 8 is designed for contactless detection of the position of the upper tool 2 and lower tool 3 within the bending press 1.
  • the stop 6 is in the Fig. 3 and 4th recognizable in detail.
  • the sensor device 8 detects the position of the tools 2, 3 in the direction along the Z axis, ie. H. along the bend line. This measurement can be carried out by detecting the position of a tool 2, 3 relative to the respective tool holder 4, 5 in which the tool 2, 3 is fixed.
  • Fig. 8 shows a schematic representation of the functional relationships in a bending press 1 according to the invention, which also includes a control device 13 for controlling the bending press 1.
  • the control device 13 controls in particular the drive 12 for the upper tool 2 and thus the actual pressing process.
  • Another control line connects the control device 13 to the drive 9 for the stop 6.
  • the sensor device 8 is also connected to the control device 13,
  • the control device 13 is now designed to adapt the movement process with which the at least one stop 6 is positioned relative to the tools 2, 3 as a function of the position of the upper tool 2 and the lower tool 3 detected by the sensor device 8.
  • a travel z 1 is calculated depending on the position in order to align the stop 6 with respect to the tools 2, 3.
  • the stop 6 does not necessarily have to lie behind the tool, as shown, but other positions relative to the tool are also conceivable, depending on the bending plan.
  • a travel path z 2 is calculated depending on the position in order to align the stop 6 with respect to the tools.
  • the approach coordinates of the stop 6 are adapted to the respective position of the tool, so that a corresponding bending process can be carried out in accordance with the bending plan.
  • the adaptation or adaptation of the movement process can of course also relate to the movements of the stop fingers 7.
  • Fig. 6 indicated - several tools are seated in a tool holder, whereby several bending line sections are defined.
  • the associated bends can be transferred to the workpiece simultaneously or one after the other. In any case, the starting coordinates of the stop 6 are automatically adjusted.
  • Steps 21 to 25 can then be repeated.
  • the position of the upper tool 2 and the position of the lower tool 3 arranged at the same height are preferably detected simultaneously.
  • the sensor device 8 can be moved into a position in which the detection area of the sensor device 8 at least partially includes both the upper tool 2 and the lower tool 3.
  • the 5 and 6 show preferred variants of the invention, in which a scale 10 is applied to the respective tool holder 4, 5. Alternatively or additionally, a scale could also be applied to the upper tool 2 and / or the lower tool 3.
  • the detection or detection of the position of the upper tool 2 and / or lower tool 3 can take place in this embodiment with the help of this scale 10.
  • image recordings of the sensor device 8 designed as a camera are evaluated with regard to the relative position of the tool in relation to the scale (for example by using appropriate image recognition software).
  • the scale division extends parallel to the bending line.
  • the position of the upper tool 2 and / or lower tool 3 is preferably detected by a contour detection of the tool 2, 3 using corresponding image processing programs.
  • a two-dimensional code 11 in particular a data matrix code (from an arrangement of black and white rectangles within a field) is applied to the upper tool 2 and the lower tool 3.
  • the code 11 contains information about the tool 2, 3 used, in particular about the type and dimensions of the tool 2, 3.
  • a code 11 is advantageously applied to both the front and the back of a tool 2, 3.
  • the tool 2, 3 can also be inserted mirror-inverted into a tool holder 4, 5 and easily recognized by the sensor device 8.
  • the code information can also be read out by means of the sensor device 8. It can then be checked whether a tool complies with the specified specifications or is compatible with the bending plan.
  • Fig. 9 shows an embodiment in which the sensor device 8 comprises two non-contact sensors with different spatial detection ranges.
  • the sensors here are optical sensors, especially cameras.
  • the cameras depict different areas along the bending line Z (also called the Z axis).
  • the detection areas of the sensors can overlap.
  • the bending press comprises an operator interface 27 (here in the form of a screen), which is connected to the control device 13 or the sensor device 8.
  • Sensor data of the sensor device 8 and / or data derived from the sensor data can be displayed on the operator interface 27. This data can be automatically output on the operator interface 27 during operation.
  • the sensor device 8 can also comprise only one sensor or camera.
  • the images or image sequences recorded with the camera can be displayed on the user interface 27.

Landscapes

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

Claims (17)

  1. Presse à plier (1), en particulier presse plieuse, pour plier des pièces (14), comprenant
    - un outil supérieur (2) et un outil inférieur (3),
    - un porte-outil (4) dans lequel l'outil supérieur (2) est inséré et un porte-outil (5) dans lequel l'outil inférieur (3) est inséré, l'outil supérieur (2) et l'outil inférieur (3) pouvant être fixés dans différentes positions à l'intérieur du porte-outil (4, 5) respectif,
    - un dispositif de commande (13) pour commander la presse à plier (1),
    - un dispositif capteur (8) qui est relié au dispositif de commande (13),
    - au moins une butée (6), afin de positionner la pièce à l'intérieur de la presse à plier (1), la butée (6) pouvant être déplacée au moyen d'un entraînement (9) commandé par les moyens de commande (13) par rapport aux outils (2, 3), étant
    le dispositif capteur (8) est conçu pour la détection sans contact de la position ou de la position et du type de l'outil supérieur (2) et de l'outil inférieur (3) dans la presse à plier (1), caractérisée en ce que
    le dispositif de commande (13) est conçu pour adapter, en fonction de la position ou de la position et du type de l'outil supérieur (2) et de l'outil inférieur (3) détectés avec le dispositif capteur (8), le processus de déplacement avec lequel l'au moins une butée (6) est positionnée par rapport aux outils (2, 3).
  2. Presse à plier selon la revendication 1, caractérisée en ce que l'au moins une butée (6) pour positionner la pièce est une butée arrière, qui peut être déplacée parallèlement à la ligne de pliage et que le dispositif capteur (8) est disposé dans la zone de la butée arrière.
  3. Presse à plier selon la revendication 1 ou 2, caractérisée en ce que le dispositif capteur (8) est disposé sur la butée (6) et, conjointement avec la butée (6), peut de préférence être déplacé parallèlement à la ligne de pliage.
  4. Presse à plier selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif capteur (8) peut être déplacé dans une position dans laquelle la zone de détection du dispositif capteur (8) comprend au moins partiellement à la fois l'outil supérieur (2) et l'outil inférieur (3) ; et/ou que le dispositif capteur (8) est une caméra.
  5. Presse à plier selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une échelle (10) ou un repère de position est appliqué(e) sur l'outil supérieur (2) et/ou sur l'outil inférieur (3) et/ou sur le porte-outil respectif (4, 5) ; et/ou qu'un code bidimensionnel (11), notamment un code de matrice de données, est appliqué sur l'outil supérieur (2) et/ou sur l'outil inférieur, le code (11) contenant de préférence des informations sur l'outil (2, 3) utilisé, notamment sur le type et les dimensions de l'outil (2, 3).
  6. Procédé de pliage d'une pièce (14) avec une presse à plier (1) selon l'une quelconque des revendications précédentes, caractérisé par les étapes consistant à :
    - détecter la position ou la position et le type de l'outil supérieur (2) et/ou de l'outil inférieur (3), qui sont fixés dans les porte-outils respectifs (4, 5), à l'intérieur de la presse à plier (1) au moyen du dispositif capteur (8),
    - adapter le processus de déplacement avec lequel l'au moins une butée (6) est positionnée par rapport aux outils (2, 3) en fonction de la position ou de la position et du type de l'outil supérieur (2) et/ou de l'outil inférieur (3) détectés par le dispositif capteur (8),
    - positionner l'au moins une butée (6) selon le processus de déplacement adapté en réglant la butée (6) au moyen d'un entraînement (9) commandé par le dispositif de commande (13) par rapport aux outils (2, 3),
    - réaliser un processus de pliage par déplacement relatif de l'outil supérieur (2) et/ou de l'outil inférieur (3).
  7. Procédé selon la revendication 6, caractérisé en ce que lors de l'étape de détection de la position ou de la position et du type de l'outil supérieur (2) et/ou de l'outil inférieur (3), sa/leur position par rapport au porte-outil respectif (4, 5) dans lequel est fixé l'outil (2, 3), est/sont détectée(s).
  8. Procédé selon la revendication 6 ou 7, caractérisé en ce qu'un trajet de déplacement (z1, z2) de la butée (6) parallèle à la ligne de pliage est calculé lors de l'étape d'adaptation du processus de déplacement.
  9. Procédé selon l'une des revendications 6 à 8, caractérisé en ce que, avant et/ou pendant l'étape de détection de la position ou de la position et du type de l'outil supérieur (2) et/ou de l'outil inférieur (3), le dispositif capteur (8) est déplacé parallèlement à la ligne de pliage.
  10. Procédé selon l'une des revendications 6 à 9, caractérisé en ce que la position ou la position et le type de l'outil supérieur (2) et la position ou la position et le type de l'outil inférieur (3) sont détectés simultanément.
  11. Procédé selon l'une des revendications 6 à 10, caractérisé en ce que la détection de la position de l'outil supérieur (2) et/ou de l'outil inférieur (3) s'effectue à l'aide d'une échelle (10) ou d'un repère de position appliqué(e) sur l'outil supérieur (2) et/ou sur l'outil inférieur (3) et/ou sur le porte-outil (4, 5) respectif.
  12. Procédé selon l'une des revendications 6 à 11, caractérisé en ce que la détection de la position et/ou l'identification du type de l'outil supérieur (2) et/ou de l'outil inférieur (3) s'effectuent par une identification des contours de l'outil (2, 3).
  13. Procédé selon l'une des revendications 6 à 12, caractérisé en ce que le procédé comprend une étape de lecture d'informations d'un code bidimensionnel (11) appliqué sur l'outil supérieur (2) et/ou sur l'outil inférieur (3), notamment un code de matrice de données.
  14. Procédé selon l'une des revendications 6 à 13, caractérisé en ce qu'une interface utilisateur (27) indique quand la position de l'outil supérieur (2) et/ou de l'outil inférieur (3) détectée par le dispositif capteur (8) est incorrecte, notamment si les outils (2, 3) ne sont pas alignés ; et/ou que le processus de pliage ou de mise en place est interrompu si la position ou la position et le type de l'outil supérieur (2) et/ou de l'outil inférieur (3) détectés avec le dispositif capteur (8) sont incorrects.
  15. Procédé selon l'une des revendications 6 à 14, caractérisé en ce que le procédé comprend un étalonnage de la position de la butée (6), l'étalonnage étant de préférence effectué au moyen d'un repère de position, optique de préférence, qui est appliqué sur un composant de la presse à plier (1) ou sur un outil de référence.
  16. Procédé selon l'une des revendications 6 à 15, caractérisé en ce que la pièce (14) à plier est munie d'un code lisible, qui contient une référence à un programme de pliage associé et qu'après lecture du code, de préférence avec le dispositif capteur (8), le programme de pliage associé est automatiquement chargé et/ou traité dans le dispositif de commande (13).
  17. Procédé selon l'une des revendications 6 à 16, caractérisé en ce que le dispositif capteur (8) comprend au moins une caméra et les images ou séquences d'images enregistrées avec la caméra sont affichées sur une interface utilisateur (27).
EP14780580.8A 2013-08-09 2014-08-05 Presse à plier Active EP3030359B1 (fr)

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EP13179819 2013-08-09
PCT/IB2014/063707 WO2015019285A1 (fr) 2013-08-09 2014-08-05 Presse à plier
EP14780580.8A EP3030359B1 (fr) 2013-08-09 2014-08-05 Presse à plier

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JP2016530102A (ja) 2016-09-29
CN105451905B (zh) 2018-04-17
JP6517203B2 (ja) 2019-05-22
EP3030359A1 (fr) 2016-06-15
US20160151820A1 (en) 2016-06-02
WO2015019285A1 (fr) 2015-02-12
CN105451905A (zh) 2016-03-30
US10189068B2 (en) 2019-01-29

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