EP1098722A1 - Bending machine with improved precision - Google Patents
Bending machine with improved precisionInfo
- Publication number
- EP1098722A1 EP1098722A1 EP00951644A EP00951644A EP1098722A1 EP 1098722 A1 EP1098722 A1 EP 1098722A1 EP 00951644 A EP00951644 A EP 00951644A EP 00951644 A EP00951644 A EP 00951644A EP 1098722 A1 EP1098722 A1 EP 1098722A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- folding
- angle
- conditions
- data
- penetration depth
- 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
- 238000005452 bending Methods 0.000 title claims abstract description 33
- 230000035515 penetration Effects 0.000 claims abstract description 104
- 238000003860 storage Methods 0.000 claims abstract description 33
- 238000012937 correction Methods 0.000 claims description 52
- 238000000034 method Methods 0.000 claims description 29
- 239000011159 matrix material Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 description 10
- 238000003908 quality control method Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 238000004422 calculation algorithm Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 2
- 101100494265 Caenorhabditis elegans best-15 gene Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
-
- 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
- B21D5/006—Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S72/00—Metal deforming
- Y10S72/702—Overbending to compensate for springback
Definitions
- the invention relates to a press brake used in particular for folding metal sheets.
- FIGS. 1 and 2 An example of a press brake, as known in the prior art, is shown diagrammatically in FIGS. 1 and 2.
- the latter comprises an upper deck 1 disposed above a lower deck 2.
- the latter is fixed, bearing at its ends, while the upper deck 1 is movable, and actuated in a vertical plane by drive members located also at its two ends.
- the drive members provide the force necessary to bend the metal sheets or sheets. More specifically, the decks 1, 2 are mounted in a frame formed by two flanges 9a and 9b joined together notably by a bracing beam (not shown).
- the upper aprons 1 and lower 2 are contained in the same vertical plane and the upper apron slides with respect to the flanges 9a and 9b using guide means 8a and 8b constituted for example by two hydraulic cylinders.
- the working edges of these two upper and lower aprons respectively carry a punch P and a corresponding matrix M.
- the lower part 4 of the lower apron 2 is fixed by welding or by any other means at its ends to the flanges 9a and 9b forming the frame of the press brake.
- FIG. 3 shows a sheet 10 placed on the matrix M in which a "V" is produced which will allow folding.
- a force F is exerted to cause the sheet to flex.
- the bending angle of a metal sheet or sheet depends on the extent of the penetration of the punch P inside the matrix M.
- a press brake can generally perform three types of folding.
- the relative movement of the punch can be stopped at the stage shown in FIG. 4. This is a first type of folding, called "folding in the air at 3 points".
- This type of folding is obtained by limiting the travel of the deck 1 when adjusting the machine.
- the internal radius Ri is less than the thickness of the sheet; it is conditioned by the radius of the punch,
- the shape of the matrix has little importance. It can also be a U. Compared with bending at the bottom of "V" and striking, bending in the air is the one requiring the least force, and the metal remains very elastic.
- One method of helping to achieve folds with optimal precision consists in using a protractor 16, mounted as illustrated in FIG. 6: the sheet 10 can rest on the branch 18 of the protractor, itself mounted on the matrix M.
- the pressure on the punch is reduced to the minimum by means of the power adjustment, in order to allow the sheet to release the elastic bending stress.
- the angle A of this elasticity is assessed in relation to the desired angle indicated by the reporter.
- the folding precision allows to reach a tolerance of + 30 minutes of angle.
- the bending in striking is that which achieves the highest angular precision, the elasticity of the sheet being canceled.
- the bending precision is all the more difficult to obtain when the thickness of the sheet 10 is thin.
- the imperfections become negligible compared to unit penetration for 1 °.
- the document JP-60 - 247 415 describes a press brake provided with a means for measuring the distances between a lower tool and an upper tool, and with a calculation means for calculating an effective bending angle of a part in function distance measurements made. The effective bending angle is compared with the bending angle to be reached, and a correction for the lowering of the tool is determined.
- a memory stores information concerning the relationship between the effective and target bending angles, and the bending angles and the level of descent of the tool.
- the device described in this document involves a step of calculating the effective angle, from measured distances, and determines a correction on the descent of the tool as a function of these measured distances.
- this method does not distinguish according to the different types of folding performed. Now, an angle calculated for a measured distance and for a given type of folding is not necessarily valid, or does not necessarily have the same type of precision, for another type of folding.
- the subject of the invention is firstly a digital control system for a folding machine, comprising: means for entering as input data a desired folding angle and folding conditions or criteria, means for storing one or more groups of data each comprising conditions of use or folding, a folding angle and at least one penetration depth, means for finding out whether the input data are stored in the storage means, in the same group of data, and means for transmitting a signal representative of the penetration depth included in said same group data, or to send a control signal from the folding machine according to this penetration depth.
- the control device or system restores the penetration value, stored in the storage means, which corresponds to these conditions of folding and desired angle. It is therefore possible to perform a folding as a function of the operating conditions implemented, hence improved folding precision.
- the value of the penetration depth then no longer depends solely on a single variable such as the distance between the lower and upper parts of the press.
- control device can also include means for determining whether there exist, in the storage means, two groups of data having the same folding conditions as those entered by the introduction means, and respective folding angles between which the desired angle is included, and for calculating a penetration depth as a function of the penetration depths belonging respectively to the two data groups.
- the calculation of the penetration depth can consist, for example, of an interpolation of the penetration depths contained in the two data groups.
- means can make it possible to modify, in the storage means, at least one parameter among the folding conditions, the folding angles and the penetration depths.
- the operator is not limited to the values stored in the storage means.
- means are also provided for making a comparison of a measured bending angle and the desired bending angle, and means for correcting the penetration depth if it results from the comparison that the angle measured is different from the desired angle.
- means make it possible to update data in the storage means as a function of the result of the correction of the penetration depth.
- Other means can be provided for writing into the storage means an additional group of data, comprising the input data and the corrected penetration depth. These last means are used when the input data were not already present in the same group of data stored in the storage means.
- the device according to the invention thus has an evolving or dynamic database which makes it possible to obtain increased precision as and when it is used.
- the invention also relates to a press brake system comprising a control system as described above.
- the invention also relates to a method of numerically controlling a folding machine comprising the following steps:
- - store in storage means one or more groups of data each comprising folding conditions, a folding angle and at least one penetration depth, receiving, as input data, a desired folding angle and conditions or folding criteria, find out whether the input data is stored in the storage means, in the same data group, and send a signal representative of the penetration depth contained in said same data group, or a machine control signal according to this penetration depth.
- This method has the same advantages as those described above in connection with the digital control system according to the invention.
- FIG. 1 represents a schematic view of a press brake according to the prior art, with displacement members
- FIG. 2 shows a vertical sectional view along line II-II of Figure 1
- FIG. 3 to 5 show different types of folding
- FIG. 6 represents a press equipped with a angle protractor
- FIG. 7A schematically represents a press brake system according to the invention
- FIG. 7B represents modes of operation of the press brake system according to the invention
- FIGS. 8A to 8C represent a detail respectively of a die, a punch and a fold
- FIG. 8D represents an offset position of a part to be folded with respect to the center of a press brake
- FIG. 9 represents a flow diagram of a programming mode executed by the press brake system according to the invention
- FIG. 10 schematically represents a digital protractor included in the press brake system according to the invention.
- FIG. 11 diagrammatically represents a circuit of a digital protractor according to FIG. 10,
- FIG. 12 represents a flowchart of an automatic correction mode executed by the press brake system according to the invention.
- FIG. 13 represents a flow diagram of a quality control mode executed by the press brake system according to the invention
- FIG. 14 represents a flow diagram of a display mode executed by the press brake system according to the invention
- - Figure 15 shows a display obtained during the automatic correction mode
- - Figure 16 shows a display obtained during the quality control mode
- FIG. 17 shows a display obtained during the display mode.
- FIG. 7A schematically represents a press brake system 20 implementing a method according to the invention.
- This system comprises two upper and lower decks 1, 2, of the type described above in relation to FIGS. 1 and 2, a digital control system 22 which controls the jacks hydraulic 8a, 8b for moving the deck 1 relative to the deck 2, and a digital protractor 21 for measuring angles obtained after folding.
- a terminal comprising a PC-type microcomputer, a display screen 25 and a keyboard 27 can also be connected to the digital control device 22 by a cable connection, for example of the RS232 type. This terminal is used to execute bending simulation programs.
- the digital control system 22 includes a display screen 24 and a keyboard 26 allowing an operator to enter data or indications relating to an angle to be reached and / or folding or use conditions as explained below. more in detail. It further comprises a processor 32, which in particular implements algorithms for calculating and managing the digital control which will be described below, an interface 30 used to read digital data transmitted by the digital reporter 21 via a cable 21a , and storage means, or memory area, 34.
- the storage means 34 store the above calculation and management algorithms.
- the storage means 34 also contain a database.
- the database consists of groups of data, or values, G1 to GN, where N is an integer, each group of data relating to three types of elements, namely:
- the folding conditions or criteria can be as follows: - matrix criteria (see Figure 8A):
- Table I shows three groups of data G1, G2 and G3 stored in the database.
- Each data group G1 to GN contains data representative of bending conditions, a value of a bending angle and values of penetration depth, also called updated or corrected values of penetration depth.
- the penetration depth values are broken down into initial penetration values Y1 and Y2 and corresponding correction values CO1 and CO2.
- Each penetration depth (update) is equal to the sum of the initial penetration value Y1, Y2 and the corresponding correction C01, CO2.
- Each penetration depth Y1 + CO1, Y2 + CO2 is associated with a hydraulic axis of the press brake. More specifically, the values Y1 + CO1 and Y2 + CO2 are representative of the displacement of the punch in the Vee of the matrix which the jacks 8a, 8b shown in FIG. 7A must respectively perform in order to obtain the bending angle.
- the data groups G1 to GN can be previously stored in the database before any operation, by the manufacturer or a user.
- the database can, subsequently, be modified or completed by the user, via the keyboard 26 and the screen 24. It can also be modified or supplemented by the digital control system 22 during the execution of a correction mode, which will be described in detail below.
- the initial penetration values Y1, Y2 are generally values which have been previously obtained by calculation or by interpolation, for example from bending conditions and a desired bending angle supplied to the digital control system 22 by the operator , when executing a programming mode which will also be described later in detail.
- the correction values CO1, CO2, when they are not zero, are values which have previously been obtained during the execution of the abovementioned correction mode.
- FIG. 7B schematically illustrates the different modes of operation of the press brake system according to the invention.
- the operator can select a programming mode 81, a correction mode 82, a production mode 83 or a display mode 84.
- the operator can program a part to be bent. To do this, it enters folding conditions and a desired folding angle in the digital control system 22, via the keyboard 26.
- the folding conditions entered by the operator must be of the same type as those stored in the database (matrix, punch, part and fold criteria).
- the system 22 determines, for each hydraulic axis, a penetration value Y1, Y2 making it possible to obtain the desired folding angle.
- FIG. 9 shows the algorithm implemented by the digital control system 22, and more particularly by its processor 32, during the execution of the programming mode.
- a step 100 the digital control system 22 reads the folding conditions and the value ⁇ of the desired folding angle entered by the operator via the keyboard 26.
- the digital control system 22 interrogates the database, contained in the storage means 34, to check whether there exists, in this database, a group of data having the same conditions of folding and the same folding angle as those entered by the operator.
- the penetration depth included in the group is selected as the penetration depth to be implemented and displayed on the display screen 24 (step 104).
- the operator can then ask the digital control system 22, via the keyboard 26, to send an order or a signal to the press brake 1-2-8a-8b, in order to make it execute folding with this depth of penetration.
- the folding is carried out under the action of the hydraulic cylinders 8a, 8b which move the upper deck 1 along a distance allowing this penetration depth to be reached.
- step 106 If there is no data group in the database having the same folding conditions and the same folding angle as those entered by the operator, it is searched (step 106) if there are two groups of values GR1 and GR2 each having folding conditions identical to those entered by the operator and having respective folding angles ai and ⁇ 2 such that ai ⁇ a ⁇ a.2.
- YRE represents the elastic return e represents the thickness of the sheet or part in the vicinity of the fold r represents the radius of the V
- V represents the width of the Vé ⁇ represents the angle of the matrix ⁇ represents the requested angle n represents the interior radius of the fold
- P u represents unit penetration.
- step 110 implemented when two groups GR1 and GR2 as described above have been found in the database, is carried out not by means of '' a simple interpolation on the penetration depth values, but as follows:
- step 110 is implemented by interpolating not on the folding angle, but on one of the folding conditions, such as the thickness of the piece to fold.
- the digital control system 22 will search, in its base of data, two data groups GR1 'and GR2' - having the same folding conditions as those indicated by the operator, except with regard to the thickness of the part,
- step 106 may consist in carrying out a first search, in the database, to determine whether two groups of data GR1 and GR2 of the type of those described above (with ⁇ 1 ⁇ ⁇ ⁇ 2) are present and, if such groups are not found, carry out a second search to determine if two groups of data GR1 'and GR2' (with e1 ⁇ e ⁇ e2) are present.
- the digital control system 22 does not find groups GR1, GR2, but finds two groups GR1 'and GR2', it performs an interpolation on the thickness of the part.
- the penetration depth value p calculated in step 1 10 or 1 12 is displayed on the display screen 24, and the operator can, as described above for step 104, execute the folding on the basis of this value.
- the correction mode designated by the reference 82 in FIG. 7B, makes it possible to correct the penetration depth determined by the digital control system 22 during the execution of the programming mode, when the operator, after having requested the realization of a fold from this depth of penetration is not satisfied with the angle actually obtained.
- the operator can, as already explained, request the digital control system 22 to control the folding machine 1 -2-8a-8b according to the value of penetration depth determined by the digital control system 22.
- the operator can then measure the angle of the fold thus produced, to check whether this angle corresponds well to the angle ⁇ which he had programmed.
- Such a measurement can be carried out with a traditional tool or protractor of the type described above in relation to FIG. 6.
- the operator enters, via the keyboard 26, the angle measured in the digital control system 22, which compares the programmed angle and the measured angle.
- the numerical control system 22 determines a correction value for the penetration depth as a function of the difference in angle, in a manner known to those skilled in the art, using a predetermined formula, such as formula (1) described above. More precisely, the formula is applied at the programmed angle, to obtain a first penetration depth; the same formula is then applied to the measured angle, to obtain a second penetration depth. The correction value then corresponds to the difference between the first and second penetration depths. The operator can then execute a fold from the corrected penetration depth, equal to the sum of the initial penetration depth and the calculated correction value. The system 22 further modifies the database to take account of the correction made.
- a predetermined formula such as formula (1) described above. More precisely, the formula is applied at the programmed angle, to obtain a first penetration depth; the same formula is then applied to the measured angle, to obtain a second penetration depth. The correction value then corresponds to the difference between the first and second penetration depths. The operator can then execute a fold from the corrected penetration depth, equal to the sum of the initial penetration depth and the calculated correction value
- the digital control system 22 changes the correction value in the database.
- the digital control system 22 introduces into the database an additional group of data, comprising the folding conditions, the bending angle, the initial penetration depth value (as determined by interpolation or the preset formula when executing the programming mode), and the correction value.
- the digital protractor 21 is used in place of the aforementioned traditional protractor to measure the angle obtained.
- FIG. 10 shows in detail the digital protractor 21.
- This protractor makes it possible to measure the angle of a part in the following manner.
- a part 40 is wedged on a first support element 42, being for example in the form of an L, and against a flat face 44 of an element 46 pivoting about an axis of rotation 48.
- An indicator of angles 50 displays the angles of rotation of the pivoting part 46.
- a graduated rule 52 is marked on the circumference of the pivoting element 46.
- a detector 54 makes it possible to read the value of the rule 46 at a certain fixed point relative to the housing 58 of the room.
- the detector 54 sends the measurement signals to an interface 60, which comprises (FIG. 11) a central unit 62 including a ROM memory 64, a RAM memory 66 and switching means 68 (for locating an origin), 70 (for recording), and 72 (general switching).
- the reference 50 represents, as in FIG. 10, a screen for viewing the data.
- Means 74 also make it possible to send signals corresponding to the measurements made, towards the interface 30 of the digital control system 22.
- the digital protractor can be previously calibrated by the operator. To this end, the operator activates a calibration mode. A calibration page appears on the screen 24 of the digital control 22.
- the calibration mode is activated automatically by the digital control system 22 when, when launching an automatic correction mode, a quality control mode or a display mode, which will be described later, the system 22 realizes that the calibration has not been carried out.
- the pivoting element 46 is brought, for example manually, to a position chosen as the reference position for an angle of 180 °.
- the operator validates the choice of this position by acting on the switching means 68.
- the display screen 50 or the console 24 then displays an angle value of 180 °.
- the operator completes the calibration phase.
- the operator activates, in the correction mode 82, a function, or a so-called automatic correction mode, designated by the reference 85 in FIG. 7B
- the value of the angle measured by the digital reporter 21 is read by the digital control system 22, which then compares the programmed angle and the measured angle, and determines a correction value for the penetration depth as a function of the angle difference.
- the determination of the correction value is carried out in the same manner as described above in relation to the correction mode, that is to say by applying a preset formula to the programmed angle, by applying this same formula to the angle measured, and calculating the difference between the two penetration depths thus obtained.
- the system 22 further modifies the database to take account of the correction made. If the folding conditions and the folding angle entered by the operator in the digital control system 22 during the execution of the programming mode were already stored in the database, in the same data group, with a value of initial penetration depth and a corresponding correction value (which is equal to zero if no correction had already been made to the value of penetration depth corresponding to said folding conditions and folding angle), the digital control system 22 changes the correction value in the database.
- the digital control system 22 introduces into the database an additional group of data, comprising the folding conditions, the bending angle, the initial penetration depth value (as determined by interpolation or the preset formula when executing the programming mode), and the correction value.
- the database according to the invention is therefore dynamic, that is to say that it can be supplemented as and when the press brake system is used.
- FIG. 12 illustrates in detail the algorithm implemented by the digital control system 22 during the execution of the automatic correction mode.
- a display is made of the programmed angle.
- One or two penetration values Y1, Y2 and one or two penetration correction values are then displayed (step 162), depending on the number of hydraulic axes provided on the bending machine 1-2- 8a-8b.
- the correction values are zero if no correction had previously been made to the penetration depths.
- the actual angle obtained after folding and measured by the operator using the digital reporter described above, is displayed by the digital control system 22 (step 164).
- the device is then reading a validation order
- step 166 given by the operator for example by pressing the switching button 68 of the digital reporter for a longer or shorter time.
- step 168 If the operator indicates in response that the measurement taken by the digital reporter is not correct (step 168), the measurement step is iterated (return to 164).
- step 170 If the operator indicates in response that the measurement is correct, it is taken into account by the digital control system 22 to assign a correction value to the initial penetration depth, as explained above, for the 'axis concerned (step 170).
- step 172 If the current axis is the last axis (step 172), the database is updated (step 174), in the manner previously explained. Otherwise, the process resumes for the next axis (step 176).
- step 182 An example of information presented to the operator during the execution of this automatic correction mode is illustrated in figure 15. This screen displays the two penetration values Y1, Y2, the two correction values, and the measured angle value (here: 90 °).
- the production mode is activated by the operator when the latter, after having programmed a part (programming mode) and possibly having the penetration depth corrected (correction mode), wishes to produce the part serial.
- the digital control system 22 sends a control signal to the press brake 1-2-8a-8b to start production on the basis of the penetration depth determined during programming mode or, if the correction mode has also been activated, based on the corrected penetration depth.
- a so-called quality control mode designated by the reference 86 in FIG. 7B. This mode allows you to check the angle of the last fold made.
- the algorithm implemented by the digital control system 22 during the execution of the quality control mode is illustrated in FIG. 13.
- a display is made of the programmed angle.
- a comparison is made by the digital control system 22 between the measured angle and the programmed angle, and it is checked (step 144) if the measured angle is within the tolerance range with respect to the programmed angle. Depending on the result of the comparison, a correct or out of tolerance folding message is displayed (steps 146, 148).
- the apparatus is then read from an end order for quality control (step 150), given by the operator for example by pressing the switching button 68 of the digital reporter 21 for a longer or shorter period. If the end order quality control is present (step 150
- the operator can perform, using this quality control mode, random controls on any angle during the production or folding cycle.
- the display mode designated by the reference 84 in FIG. 7B, makes it possible to display on the screen 24 an angle measured by means of the digital reporter 21 and transmitted by the latter to the digital control system 22 via the cable 21a.
- step 130 an angle of a part positioned on the digital reporter 21 is measured and displayed on the screen 24 (cf. FIG. 17) until an end of display order (step 134) or a calibration order (step 138) is present.
- the end of display order is given by the operator for example by pressing and holding the switching button 68 of the digital reporter 21, while the calibration order is given by pressing the same button impulse.
- step 136 the execution of the display mode ends in a step 136.
- step 140 the digital control detects a calibration order, the calibration mode, described above, is activated in a step 140 .
- the process according to the invention is preferably implemented by means of a program executed by the processor 32 of the digital control system 22 and stored in the memory area 34.
- This program may have been loaded from a medium (for example: floppy disk or CD Rom or any magnetic medium) capable of being read by a computer system or by the digital control system 22.
- Such a support therefore includes instructions for executing a method according to the invention, as described above, and in particular in conjunction with one of FIGS. 7B, 9, 12, 13 and 14.
- the assembly can also be connected to other peripheral devices, for example to an electronic communication network, making it possible to send and / or receive data relating to the angles or the folding conditions.
- a plurality of machines from the same manufacturer can be linked by a network to a central unit which collects the data stored by all the machines individually. This results in the constitution of files of larger size, thus making it possible, for example, to carry out statistical processing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Reinforced Plastic Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9909077A FR2796320B1 (en) | 1999-07-13 | 1999-07-13 | IMPROVED PRECISION FOLDING PRESS |
FR9909077 | 1999-07-13 | ||
PCT/FR2000/001991 WO2001003863A1 (en) | 1999-07-13 | 2000-07-10 | Bending machine with improved precision |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1098722A1 true EP1098722A1 (en) | 2001-05-16 |
EP1098722B1 EP1098722B1 (en) | 2002-12-04 |
Family
ID=9548048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00951644A Expired - Lifetime EP1098722B1 (en) | 1999-07-13 | 2000-07-10 | Bending machine with improved precision |
Country Status (7)
Country | Link |
---|---|
US (3) | US6539763B1 (en) |
EP (1) | EP1098722B1 (en) |
JP (1) | JP2003504208A (en) |
AT (1) | ATE228898T1 (en) |
DE (1) | DE60000908T2 (en) |
FR (1) | FR2796320B1 (en) |
WO (1) | WO2001003863A1 (en) |
Cited By (1)
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EP1452249A2 (en) * | 2003-02-28 | 2004-09-01 | ALTAIR ENGINEERING S.r.l. | Numeric control machine for the cold forming of sheet metal parts |
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JP4558877B2 (en) * | 2000-01-17 | 2010-10-06 | 株式会社アマダ | Bending method and apparatus |
TW536432B (en) * | 2000-01-17 | 2003-06-11 | Amada Co Ltd | Method and system for processing a sheet member, and various devices relating to such system |
JP3085272U (en) * | 2001-10-10 | 2002-04-26 | 株式会社サルバニーニジャパン | High performance machine with reduced setup time for programmed sheet bending |
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- 2000-07-10 US US09/600,166 patent/US6539763B1/en not_active Expired - Fee Related
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EP1452249A2 (en) * | 2003-02-28 | 2004-09-01 | ALTAIR ENGINEERING S.r.l. | Numeric control machine for the cold forming of sheet metal parts |
EP1452249A3 (en) * | 2003-02-28 | 2005-11-16 | ALTAIR ENGINEERING S.r.l. | Numeric control machine for the cold forming of sheet metal parts |
Also Published As
Publication number | Publication date |
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JP2003504208A (en) | 2003-02-04 |
US20030066325A1 (en) | 2003-04-10 |
ATE228898T1 (en) | 2002-12-15 |
FR2796320B1 (en) | 2001-10-05 |
FR2796320A1 (en) | 2001-01-19 |
WO2001003863A1 (en) | 2001-01-18 |
US6644082B2 (en) | 2003-11-11 |
US6651472B2 (en) | 2003-11-25 |
US20030069662A1 (en) | 2003-04-10 |
US6539763B1 (en) | 2003-04-01 |
DE60000908D1 (en) | 2003-01-16 |
DE60000908T2 (en) | 2003-10-02 |
EP1098722B1 (en) | 2002-12-04 |
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