EP3814125B1 - Procédé de fonctionnement d'une poinçonneuse et poinçonneuse pour le fonctionnement selon ce procédé - Google Patents

Procédé de fonctionnement d'une poinçonneuse et poinçonneuse pour le fonctionnement selon ce procédé Download PDF

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Publication number
EP3814125B1
EP3814125B1 EP18743747.0A EP18743747A EP3814125B1 EP 3814125 B1 EP3814125 B1 EP 3814125B1 EP 18743747 A EP18743747 A EP 18743747A EP 3814125 B1 EP3814125 B1 EP 3814125B1
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EP
European Patent Office
Prior art keywords
ram
stop
contact
die
monitored
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Active
Application number
EP18743747.0A
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German (de)
English (en)
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EP3814125A1 (fr
Inventor
Ugo De Santis
Herbert HÖGGER
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Bruderer AG
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Bruderer AG
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Publication of EP3814125A1 publication Critical patent/EP3814125A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/14—Control arrangements for mechanically-driven presses
    • B30B15/144—Control arrangements for mechanically-driven presses for stopping the press shaft in a predetermined angular position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B30B15/0041—Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026—Mounting of dies, platens or press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/14—Control arrangements for mechanically-driven presses

Definitions

  • the present invention relates to a method for operating a stamping press, stamping presses for operation according to the method and the use of such stamping presses to produce embossing for predetermined separation points in sheet metal surfaces according to the preambles of the independent patent claims.
  • the closing dimension essentially depends on the position of the upper tool part at the bottom dead center of the crank mechanism (BDC position).
  • Important influencing variables for a change in the BDC position are the speed of the crank mechanism, the oil temperature (heating of the machine), the ambient temperature (changes over the course of the day) and the tool heating.
  • the tools are usually equipped with so-called fixed stops equipped. These fixed stops have the function of forcibly limiting the closing dimension under operating conditions.
  • the press is inevitably clamped at the bottom dead center in order to ensure a stop contact of the fixed stops.
  • the previously mentioned influencing factors of speed, oil temperature, ambient temperature and tool heating can significantly change the degree of stress during operation, with the result that the press is additionally heavily loaded with forces that are not involved in the actual process and apart from the fact that they are unnecessary Destroy energy, can lead to increased wear of the press.
  • EP 0 554 501 A1 discloses devices and methods for correcting the closing dimension in a stamping press with fixed stops. Fixed stops arranged outside of the tool are adjusted in height with the help of piezo elements, and the press is thus clamped to a greater or lesser extent at the bottom dead center
  • a first aspect of the invention relates to a method for operating a stamping press, in particular with a tool with which embossings for predetermined separation points are produced in sheet metal surfaces.
  • the stamping press includes a ram that works against a preferably fixed platen.
  • the position of the ram in relation to the clamping plate i.e. the relative position of the upward and downward movement of the ram in relation to the clamping plate can be adjusted during normal operation.
  • the ram carries a first part of the tool and the platen carries a second part of the tool.
  • the two tool parts have mutually associated stop surfaces which, when the tool is completely closed, form one or more fixed stops for limiting the closing mass of the tool inside the tool.
  • the distance between the two tool parts or a parameter representing this distance i.e. a parameter from which the distance between the two tool parts can be derived, at a specific point in the ram movement at which the tool is not completely closed, monitored and then changed the ram position depending on the monitoring result.
  • the tool is not completely closed in the sense of the claim if the closing dimension of the tool is not limited by the or one of the fixed stops, ie no associated stop surfaces of the two tool parts are in stop contact. This is independent of whether the tool is in deformation contact with the workpiece or not.
  • the distance between the two tool parts or the parameter representing this distance is preferably monitored at a point in the ram movement which is closer to bottom dead center than top dead center, preferably just before or just after bottom dead center. The closer this point at the bottom Dead center is, the more precisely the process can be managed.
  • the distance between the two tool parts or the parameter representing this distance is monitored at a point in the ram movement at which the tool is not in deformation contact with the workpiece, i.e. does not act on the workpiece, so that the ram does no work.
  • the distance between the two tool parts or the parameter representing this distance is monitored at a point in the ram movement at which the tool is in deformation contact with the workpiece, i.e. it acts on the workpiece, so that the ram does work done.
  • This variant offers the advantage that the monitoring takes place under operating conditions that are very similar to the conditions at bottom dead center. This enables a particularly precise process control.
  • one or the other variant may be more preferable.
  • the movement of the ram is preferably generated via a crank or eccentric drive, in particular such that a 360° revolution of a crank or eccentric shaft is converted into a complete downward movement and a complete upward movement of the ram between an upper and a lower dead center of the ram movement.
  • a crank or eccentric drive in particular such that a 360° revolution of a crank or eccentric shaft is converted into a complete downward movement and a complete upward movement of the ram between an upper and a lower dead center of the ram movement.
  • the distance between the two tool parts or the parameter representing this distance is determined at a specific angular position of the crank or To monitor the eccentric drive on which the tool is not completely closed, and then to change the ram position depending on the monitoring result.
  • the angular position can be determined exactly and is therefore particularly suitable for determining the point of the ram movement at which the distance between the two tool parts or the parameter representing this distance is monitored.
  • the monitoring advantageously takes place at an angular position which is in a range of plus/minus 35° around the bottom dead center. It has been shown that this angular position range is particularly well suited for monitoring the distance between the two tool parts or the parameter representing this distance.
  • the distance between the two tool parts or the parameter representing this distance is kept constant at the specific point of the ram movement or at the specific angular position in normal operation by manually or automatically adjusting the ram position as a function of the monitoring result.
  • the distance between the two tool parts or the parameter representing this distance is set to a specific value at the specific point of the ram movement or at the specific angular position, in particular to an empirically determined value at which a desired production result is achieved, and then by Adjustment of the ram position is kept constant at this value as a function of the monitoring result achieve optimal production results with minimum mechanical stress on the press with a high level of efficiency.
  • a second aspect of the invention relates to a further method for operating a stamping press, in particular with a tool with which embossings for predetermined separation points are produced in sheet metal surfaces.
  • the stamping press comprises a ram which works against a preferably fixed platen and whose ram position relative to the platen can be adjusted during normal operation.
  • the ram carries a first part of the tool and the platen carries a second part of the tool.
  • the two tool parts have mutually associated stop surfaces which, when the tool is completely closed, form one or more fixed stops for limiting the closing mass of the tool inside the tool.
  • the monitoring for impact contact can be carried out directly or indirectly, ie by detecting effects caused by the impact contact are caused (directly) or by parameters that indicate or represent a stop contact (indirectly).
  • an electrical contact is made or closed by the contact of the respective stop surfaces, which electrical contact generates a contact signal that is used for monitoring.
  • one of the stop surfaces advantageously has two contacts for this purpose in at least one of the fixed stops, which are short-circuited by the other stop surface for generating the contact signal when there is a stop contact.
  • the two stop surfaces form a contact pair which is closed for generating the contact signal when there is a stop contact.
  • a deformation of a physicality of the tool or a tool area that takes place under the impact pressure, which or which provides one of the contact surfaces of a fixed stop is detected to monitor the fixed stop for stop contact, e.g. by means of strain gauges and/or piezo elements.
  • a parameter representing the stop contact is monitored.
  • this is done in such a way that physical entities formed by the two tool parts or carried by them are monitored, preferably without contact, for a relative position to one another that represents the stop contact, eg to a reference dimension, which is only reached when there is contact with the stop.
  • one or more reference stops are monitored for stop contact, which are each formed by associated stop surfaces of the two tool parts and where the stop contact is made, the monitored fixed stop or stops also have stop contact. This is done, for example, in such a way that, as described above, an electrical contact is made or closed by the contact of the contact surfaces of the respective reference stop, which generates a contact signal, or that a deformation of a physical entity that occurs under the contact pressure, which one of the contact surfaces of the respective reference stop provides, is detected.
  • the movement of the ram is preferably generated via a crank or eccentric drive, in particular such that a 360° rotation of a crank or eccentric shaft results in a complete downward movement and a subsequent complete upward movement of the ram between an upper and a lower dead center of the ram movement is converted.
  • a crank or eccentric drive in particular such that a 360° rotation of a crank or eccentric shaft results in a complete downward movement and a subsequent complete upward movement of the ram between an upper and a lower dead center of the ram movement is converted.
  • the course of movement of the first tool part or the ram relative to the fixed press structure, relative to the clamping platen or relative to the second tool part is monitored in the area of the bottom dead center of the ram movement and the ram position is changed depending on the monitoring result .
  • this is done in such a way that the time or the angle of rotation of the crank or eccentric drive is monitored during which the first tool part or the ram is in the area of the bottom dead center of the ram movement, there is no relative movement with respect to the fixed press structure, with respect to the platen or with respect to the second tool part, and the ram position is changed as a function of this time or this angle of rotation. In this way, relatively simple and precise monitoring is possible.
  • the drive torque curve or the power consumption curve of the press drive is monitored in the area of the bottom dead center of the ram movement and the ram position is changed depending on the monitoring result.
  • this is done in such a way that the time or the angle of rotation of the crank or eccentric drive is monitored during which the drive torque or the power consumption in the area of bottom dead center of the ram movement has a specific course or exceeds a specific threshold value, and the ram position is changed as a function of this time or this angle of rotation.
  • the maximum value that the drive torque or the power consumption reaches in the area of the bottom dead center of the ram movement is monitored and the ram position is changed as a function of the monitoring result.
  • the duration of the stop contact of one or more fixed stops is manually or automatically adjusted by adjusting the ram position as a function of the Monitoring result kept constant. This makes it possible to keep the degree of clamping of the press at bottom dead center essentially constant over the entire operation, independent of influencing variables such as speed, oil temperature, ambient temperature and tool heating, so that uniform product quality and efficient and low-wear operation can be guaranteed .
  • the ram position is set as a function of the monitoring result in such a way that a specific stop contact duration results, preferably the shortest possible stop contact duration. In this way, optimal production results can be achieved with a high degree of efficiency with minimal mechanical stress on the press.
  • the tool of the stamping press has a plurality of monitored fixed stops. During normal operation, a specific constellation of these monitored fixed stops is brought into stop contact, preferably automatically, by adjusting the ram position as a function of the monitoring result for each working stroke.
  • the ram position is set as a function of the monitoring result in such a way that a fixed stop of the constellation that came into stop contact last is in stop contact for as short a time as possible. In this way, too, with such tools, optimum production results can be achieved with a high degree of efficiency with minimal mechanical stress on the press.
  • embossings for predetermined separation points in sheet metal surfaces are advantageously produced with the tool according to the first and the second aspect of the invention, preferably predetermined separation points in sheet metal surfaces for container lids with tear-open or press-in tabs.
  • the advantages of the method according to the invention come into play particularly clearly.
  • a third aspect of the invention relates to a first punch press for use in accordance with the method of the first aspect of the invention.
  • the stamping press comprises a preferably fixed platen and a ram which works against the platen.
  • the ram position of the ram relative to the clamping plate is adjustable in normal operation.
  • the ram carries a first tool part and the platen carries a second tool part.
  • the two tool parts provide mutually associated stop surfaces which, when the tool is completely closed, form one or more fixed stops for limiting the closing dimension of the tool inside the tool.
  • Such punching tools are typically used when high-precision embossing has to be produced, e.g. predetermined separation points in can end blanks.
  • the stamping press has devices for controlling the position of the ram, with which, when the stamping press is operated as intended, the distance between the two tool parts or a parameter representing this distance at a specific point in the ram movement at which the tool is not completely closed, as under the first aspect described according to the invention can be monitored and the ram position can be changed depending on the monitoring result.
  • the tool is not completely closed in the sense of the claim if the closing dimension of the tool is not limited by the or one of the fixed stops, ie none of the assigned stop surfaces of the two tool parts are in stop contact. This is independent of whether the tool is in deformation contact with the workpiece or not.
  • its devices for controlling the ram position are designed in such a way that the distance between the two tool parts or the parameter representing this distance can be monitored at a point in the ram movement which is closer to the bottom dead center of the ram movement than to the top dead center the same. This point is preferably just before or just after bottom dead center. The closer this point is to bottom dead center, the more precisely the process can be managed.
  • the devices for controlling the position of the ram are designed in such a way that the distance between the two tool parts or the parameter representing this distance can be monitored at a point in the ram movement at which the tool is not in deformation contact with the workpiece, i.e does not act on the workpiece, so that the ram does not do any work.
  • the devices for controlling the ram position are designed in such a way that the distance between the two tool parts or the parameter representing this distance can be monitored at a point in the ram movement at which the tool is in deformation contact with the workpiece. So acts on the workpiece, so that the ram performs work.
  • This variant offers the advantage that the monitoring can take place under operating conditions that Conditions at bottom dead center are very similar, making a particularly precise process control possible.
  • one variant or the other may be more preferable.
  • the devices for controlling the ram position are designed in such a way that the distance between the two tool parts or a parameter representing this distance can be monitored both before and after the bottom dead center of the ram movement and then the ram position as a function of this Monitoring results can be changed.
  • the stamping press preferably has a crank or eccentric drive for generating the ram movement.
  • a 360° rotation of a crank or eccentric shaft is converted into a complete downward movement and a complete upward movement of the ram between an upper and a lower dead center of the ram movement.
  • Such stamping presses have established themselves for the production of stamped parts with a high cadence.
  • the devices for controlling the ram position are advantageously designed in such a way that they can be used to monitor the distance between the two tool parts to each other or to the parameter representing this distance at an angular position which is in a range of plus/minus 35° around the bottom dead center. It has been shown that this angular position range is particularly well suited for monitoring the distance between the two tool parts or a parameter representing this distance.
  • the devices for controlling the position of the ram are designed in such a way that the distance between the two tool parts or the parameter representing this distance at the specific point of the ram movement or at the specific angular position in normal operation is adjusted by adjusting the ram position can be kept constant depending on the monitoring result. This makes it possible to keep the degree of clamping of the press at bottom dead center essentially constant over the entire operation, independent of influencing factors such as speed, oil temperature, ambient temperature and tool heating, so that uniform product quality and efficient, low-wear operation can be ensured .
  • the devices for controlling the ram position are advantageously designed in such a way that the distance between the two tool parts or the parameter representing this distance can be set to a specific value at the specific point of the ram movement or at the specific angular position, preferably to an empirically determined value Value at which a desired production result is achieved and can then be kept constant at this value in an automated manner by adjusting the ram position as a function of the monitoring result.
  • a specific value at the specific point of the ram movement or at the specific angular position preferably to an empirically determined value Value at which a desired production result is achieved and can then be kept constant at this value in an automated manner by adjusting the ram position as a function of the monitoring result.
  • a fourth aspect of the invention relates to a further stamping press for operation according to the method according to the second aspect of the invention.
  • This second stamping press also includes a preferably stationary platen and a ram which works against the platen.
  • the ram position of the ram relative to the clamping plate can also be adjusted during normal operation.
  • the ram carries a first tool part and the platen carries a second tool part.
  • the two tool parts provide mutually associated stop surfaces which, when the tool is completely closed, form one or more fixed stops for limiting the closing dimension of the tool inside the tool.
  • the stamping press has devices for controlling the ram position, with which at least one of the fixed stops of the tool can be monitored for abutment contact during normal operation of the stamping press and the ram position can be changed depending on the monitoring result.
  • the tool is not completely closed in the sense of the claim if the closing dimension of the tool is not limited by the or one of the fixed stops, ie no associated stop surfaces of the two tool parts are in stop contact. This is independent of whether the tool is in deformation contact with the workpiece or not.
  • the tool is designed in such a way that an electrical contact is made or closed by the contact of the respective stop faces which generates a monitoring contact signal for the devices for controlling the ram position.
  • one of the stop surfaces advantageously has two contacts for this purpose in at least one of the fixed stops, which are short-circuited by the other stop surface for generating the contact signal when there is a stop contact.
  • the two stop surfaces form a contact pair which is closed for generating the contact signal when there is a stop contact.
  • the tool and the devices for controlling the ram position are designed in such a way that deformation of a physicality of the tool or of a tool area that takes place under the impact pressure, which or which provides one of the contact surfaces of a fixed stop, is monitored of the fixed stop to the stop contact can be detected, in particular by means of strain gauges and/or piezo elements, and the ram position can be changed as a function of this.
  • the devices for controlling the position of the ram are designed in such a way that a parameter representing the stop contact can be monitored.
  • the devices for controlling the ram position are designed in such a way that bodies formed by or carried by the two tool parts can be monitored, preferably without contact, for a relative position to one another that represents the stop contact, e.g. for a reference dimension that is only reached when the stop contact occurs becomes.
  • the tool and the devices for controlling the ram position are designed in such a way that one or more reference stops formed by associated stop surfaces of the two tool parts, with the stop contact of which the monitored fixed stop or stops have stop contact, are monitored for stop contact preferably in such a way that an electrical contact is made or closed by the contact of the contact surfaces of the respective reference stop, which generates a contact signal, or that a deformation of a physical entity occurring under the contact pressure, which one of the contact surfaces of the respective reference stop provides, is detected can.
  • the second stamping press preferably also has a crank or eccentric drive for generating the ram movement, with which a 360° rotation of a crank or eccentric shaft is converted into a complete downward movement and a complete upward movement of the ram between an upper and a lower dead center of the ram movement becomes.
  • a crank or eccentric drive for generating the ram movement, with which a 360° rotation of a crank or eccentric shaft is converted into a complete downward movement and a complete upward movement of the ram between an upper and a lower dead center of the ram movement becomes.
  • the devices for controlling the position of the ram are designed in such a way that the course of movement of the first tool part or the ram relative to the stationary press structure, relative to the clamping platen or relative to the second tool part is in the area of the bottom dead center of the ram movement can be monitored and the ram position can be changed depending on the monitoring result.
  • the devices for controlling the ram position are of this type designed so that the time or the angle of rotation of the crank or eccentric drive can be monitored during which the first tool part or the ram in the area of the bottom dead center of the ram movement does not move relative to the fixed press structure, to the clamping plate or to the second tool part carried out, and the ram position can be changed depending on this time or this angle of rotation. This allows for relatively easy and precise monitoring.
  • the devices for controlling the ram position are designed in such a way that the drive torque curve or the power consumption curve of the crank or eccentric drive can be monitored in the area of the bottom dead center of the ram movement and the ram position as a function can be changed by the monitoring result.
  • the devices for controlling the ram position are designed in such a way that the time or the angle of rotation of the crank or eccentric drive can be monitored during which the drive torque or the power consumption in the area of the bottom dead center of the ram movement follows a certain course has or exceeds a certain threshold value and the ram position can be changed depending on the monitoring result.
  • the devices for controlling the ram position are designed in such a way that the maximum value that the drive torque or the power consumption reaches in the area of bottom dead center of the ram movement can be monitored and the ram position can be changed depending on the monitoring result.
  • the devices for controlling the ram position are designed in such a way that, during normal operation, the duration of the stop contact of one or more fixed stops can be kept constant, preferably automatically, by adjusting the ram position as a function of the monitoring result. This makes it possible to keep the degree of clamping of the press at bottom dead center essentially constant over the entire operation, independent of influencing factors such as speed, oil temperature, ambient temperature and tool heating, so that uniform product quality can be ensured.
  • the devices for controlling the ram position are designed in such a way that the ram position can be adjusted depending on the monitoring result in such a way that a specific stop contact duration results, preferably the shortest possible stop contact duration. In this way, optimal production results can be achieved with a high degree of efficiency with minimal mechanical stress on the press.
  • the tool of the stamping press has a plurality of monitored fixed stops and the devices for controlling the ram position are designed in such a way that, during normal operation, a specific constellation from these monitored fixed stops is preferably automatically generated by setting the ram position as a function of the Monitoring result can be brought into stop contact with each working stroke.
  • the devices for controlling the ram position are preferably designed in such a way that the ram position can be set as a function of the monitoring result in such a way that a fixed stop of the constellation that came into stop contact last is in stop contact for as short a time as possible. In this way, too, optimal production results can be achieved with a high degree of efficiency with minimal mechanical stress on the press.
  • a fifth aspect of the invention relates to the use of the inventive stamping presses according to the third and fourth aspects of the invention for producing embossing for predetermined separation points in sheet metal surfaces, preferably for predetermined separation points in sheet metal surfaces for container lids with a tear-open or press-in tab.
  • the advantages of the invention are particularly evident in such uses.
  • FIG. 1 shows a highly abstracted inventive high-speed punching press 1 for the production of stamped parts with high-precision embossing for predetermined separation points in sheet metal surfaces, such as blanks for Container lid with tear-off or press-in tab, front view.
  • the press 1 has a fixed platen 3 and a ram 2 which works against the platen 3 .
  • the position of the ram ie the relative position of the up and down movement of the ram 2 in relation to the clamping plate 3, can be adjusted during normal operation.
  • the ram 2 carries an upper tool part 4 (first tool part according to the claims), which has a punch 9 with a punching mandrel 10 and a stamping projection 11 running around the punching mandrel 10 .
  • the clamping plate 3 carries a lower tool part 5 (second tool part according to the claims), which forms a support surface for the strip of material 13 to be processed and a die 12 for the punching mandrel 10 of the upper tool part 4 .
  • the two tool parts 4 and 5 together form the stamping and embossing tool 4, 5 of the press 1. They each have stop bodies 6, 7, which provide mutually associated stop surfaces 6a, 7a, which when the tool 4, 5 is completely closed, provide fixed stops for the tool-internal limitation of the closing mass of the tool 4, 5 form.
  • the stamping press 1 has a crank drive 8 for generating the ram movement (represented symbolically with dashed lines), which converts a 360° rotation of a crankshaft into a complete downward movement and a subsequent complete upward movement of the ram 2 between a top dead center and a bottom dead center UT ram movement converted.
  • a crank drive 8 for generating the ram movement (represented symbolically with dashed lines), which converts a 360° rotation of a crankshaft into a complete downward movement and a subsequent complete upward movement of the ram 2 between a top dead center and a bottom dead center UT ram movement converted.
  • the material strip 13 to be processed is intermittently pushed through the press 1 from right to left by means of a strip feed (not shown).
  • the press 1 has a press controller (not shown) with devices for controlling the ram position.
  • the distances, the thickness of the strip material 13 and in particular also the height of the embossing projection 11 are shown significantly enlarged for better visibility.
  • the press control is designed according to the invention in such a way that, during normal operation of the punching press 1, it measures the distance a, a1, a2, a3 between the two tool parts 4, 5 or a parameter b1, b2, b3 representing this distance , c can be monitored at a specific point P1, P2, P3 of the ram movement, at which the tool 4, 5 is not completely closed, and the ram position can be changed depending on the monitoring result, preferably in such a way that it is constant over the entire production operation Closing conditions of the tool 4, 5 are present at bottom dead center of the ram movement.
  • this sensor 14 is an inductive distance sensor or a laser distance sensor.
  • the press ram 2 in the situation shown here - shortly after the punching and embossing process has taken place - is in the upward movement in a position which corresponds to a rotational angle position P1 of the crank mechanism of 35° after BDC (+35°) corresponds.
  • the stop faces 6a, 7a of the stop bodies 6, 7 shown are at a distance a1 from one another.
  • the tool 4, 5 is not in deforming contact with the strip of material 13 and consequently does not perform any work either.
  • the press controller uses the sensor 14 to determine the distance a1 between the stop surfaces 6a, 7a or a reference distance, e.g. the distance b1 between the sensor 14 and the stop surface 6a of the upper stop body 6, and compares this with a target value.
  • This determination of the distance a1 or the reference distance b1 and comparing it with a target value corresponds to the claimed monitoring of the distance between the two tool parts or a parameter representing this distance (reference distance).
  • the press control changes the ram position, in the present case in such a way that with continuous Monitoring the deviation from the setpoint is reduced or eliminated.
  • the press ram 2 is in the illustrated situation in the downward movement - shortly before the stamping and embossing process - in a position which one Angle of rotation position P2 of the crank mechanism of 20° before UT (-20°) corresponds.
  • the stop surfaces 6a, 7a of the stop bodies 6, 7 shown are at a distance a2 from one another or the sensor 14 is at a distance b2 from the stop surface 6a of the upper stop body 6.
  • the tool 4, 5 is not in deformation contact with the material strip 13 and consequently does not perform any work either.
  • the second mode of operation of the punch press 1 according to the invention illustrated here differs from that in 2 illustrated only by the fact that here the distance a2 between the stop surfaces 6a, 7a or the reference distance b2 is determined in each case in the rotational angle position P2 of the crank drive (20° before BDC) and compared with a corresponding setpoint value.
  • Monitoring the distance a2 between the two tool parts 4, 5 or a reference distance b2 representing this distance at the rotational angle position P2 shortly before the punching mandrel 10 and the embossing projection 11 hit the material strip 13 has the advantage that the acceleration forces acting on the system are very are similar to those in the bottom dead center, but there are still no system vibrations excited by the punching impact, which could interfere with the measurement. Accordingly, very reliable and precise monitoring is possible in this way.
  • the press ram 2 is in the in 4 illustrated situation in the downward movement during the punching and embossing process in a position which corresponds to a rotational angle position P3 of the crank mechanism of 10 ° before the BDC (-10 °).
  • the stop surfaces 6a, 7a of the stop bodies 6, 7 shown are at a distance a3 from one another or the sensor 14 is at a distance b3 from the stop surface 6a of the upper stop body 6.
  • the punching mandrel 10 has already completely pierced the strip of material 13 and entered the die 12 and the embossing projection 11 has just begun to penetrate the strip of material 13 . Accordingly, in this situation the tool is in deformation contact with the material strip 13 and performs deformation work (embossing).
  • the third mode of operation of the punch press according to the invention illustrated here differs from that in 3 illustrated only by the fact that here the distance a3 between the stop surfaces 6a, 7a or the reference distance b3 is determined in each case in the rotational angle position P3 of the crank drive (10° before BDC) and compared with a corresponding setpoint value.
  • Monitoring the distance a3 between the two tool parts 4, 5 or a reference distance b3 representing this distance at the rotational angle position P3 after the punching mandrel 10 has passed through the material strip 13 and while the embossing projection 11 has penetrated the material strip 13 has the advantage that the The total forces acting on the system are very similar to those that occur in ideal operation at bottom dead center. Accordingly, particularly reliable and precise monitoring is possible with this mode of operation.
  • the second embodiment of the punch press 1 according to figure 5 differs from the first embodiment according to the figures 2 , 3 and 4 in that the distance sensor 14 is not arranged in the lower stop body 7 is, but on an auxiliary carrier 16, and that with it the distance c between the sensor 14 and a reference surface 21 on the underside of the upper tool half 4 is determined.
  • this reference distance c is a parameter representing the distance between the stop surfaces 6a and 7a of the stop bodies 6, 7 according to the claims.
  • the rest of the structure of the stamping press 1 is identical to that according to the first embodiment and the sensor 14 is also an inductive distance sensor or a laser distance sensor in the present case.
  • the press ram 2 is in the situation shown here (as already in the 2 situation shown) shortly after the punching and embossing process has taken place in the upward movement in a position which corresponds to a rotational angle position P1 of the crank mechanism of 35° after BDC (+35°).
  • the stop surfaces 6a, 7a of the stop bodies 6, 7 shown are at a distance a from one another.
  • the tool is not in deforming contact with the strip of material 13 and consequently does not perform any work either.
  • the press controller uses the sensor 14 to determine the distance a between the stop surfaces 6a, 7a or a reference distance, e.g. the distance c between the sensor 14 and the reference surface 21 on the underside of the upper tool half 4 and compares this with a target value.
  • This determination of the distance a or the reference distance c and comparing the same with a Target value corresponds to the claimed monitoring of the distance between the two tool parts or a parameter representing this distance (reference distance).
  • the press controller changes the ram position, specifically in the present case in such a way that the deviation from the target value is reduced or eliminated with continuous monitoring.
  • the press controller is designed according to the invention in such a way that it can be used to monitor at least one of the fixed stops for stop contact during normal operation of the punch press 1 and the ram position can be changed as a function of the monitoring result, preferably in such a way that over the entire production operation constant closing conditions of the tool 4, 5 are present at the bottom dead center of the ram movement.
  • the press ram 2 is in the figures 6 to 11 illustrated situations each in the bottom dead center UT of its movement.
  • the stop surfaces 6a, 7a of the stop bodies 6, 7 shown are in contact with one another and thus form a fixed stop that limits the tool closing dimension.
  • the press control does not determine the distance between the stop surfaces 6a, 7a or a reference distance at a specific angular position P1, P2 or P3, but rather uses the sensor 14 to determine the angular positions Pk1 and Pk2 or the angular range or the time period t without contact , between which or within which there is no longer any distance between the stop surfaces 6a, 7a (stop contact) or between which or within which a specific minimum distance between the stop surfaces 6a, 7a is fallen below or reached.
  • the press control evaluates the reference distance d between the sensor 14 and the stop surface 6a of the upper stop body 6, which represents the stop contact of the stop surfaces 6a and 7a or the determined minimum distance.
  • the determined rotational angle positions Pk1, Pk2, rotational angle ranges and/or time periods t are compared with setpoint values. If the press control detects a deviation from the target value, it changes the ram position in such a way that the deviation from the target value is reduced or eliminated with continuous monitoring.
  • the fourth embodiment of the punch press 1 according to 7 differs from the second embodiment according to figure 5 in that it does not have a distance sensor 14 for determining a reference distance representing the distance between the stop surfaces 6a, 7a, but rather two strain gauges 17 or piezoelectric elements with which a deformation D of the lower stop body 7 when the upper stop body 6 is pressed with its stop surface 6a against the Stop surface 7a of the lower stop body 7 can be determined. It also has a press control which implements another mode of operation of the press 1 according to the invention.
  • the press controller uses the strain gauges 17 or piezoelectric elements to determine the rotational angle positions Pk1 and Pk2 or the rotational angle range or the time period t between which or within which contact there is contact between the stop surfaces 6a, 7a.
  • the determined rotational angle positions Pk1, Pk2, rotational angle ranges and/or time periods t are compared with setpoint values. If the press control detects a deviation from the target value, it changes the ram position in such a way that the deviation from the target value is reduced or eliminated with continuous monitoring.
  • the fifth embodiment of the punch press 1 according to 8 differs from the second embodiment according to figure 5 in that it has no strain gauges 17 or piezo elements for determining a stop contact between the stop surfaces 6a, 7a, but these stop surfaces 6a, 7a are formed by electrical contact bodies 18a and 18b, which together form a contact pair 18a, 18b, which is used to generate a Contact signal KS is closed at stop contact. It also has a press control which implements another mode of operation of the press according to the invention.
  • the press control uses the pair of contacts 18a, 18b to determine the rotary angle positions Pk1 and Pk2 or the rotary angle range or the time period t between which or within which there is abutment contact between the abutment surfaces 6a, 7a.
  • the determined rotational angle positions Pk1, Pk2, rotational angle ranges and/or time periods t are compared with setpoint values. If the press control detects a deviation from the target value, it changes the ram position in such a way that the deviation from the target value is reduced or eliminated with continuous monitoring.
  • the sixth embodiment of the punch press 1 according to 9 differs from the fifth embodiment according to FIG 8 in that the stop surface 7a of the lower stop body 7 is formed by two separate electrical contact bodies 19a and 19b, while the stop surface 6a of the upper stop body 6 is formed by a single connected contact body 20.
  • the contact bodies 19a and 19b form two contacts 19a, 19b, which are short-circuited by the contact body 20 when there is abutment contact and thereby generate a contact signal KS.
  • the press control is identical here to that of the fifth embodiment of the punch press described above. With the aid of the contacts 19a, 19b, it determines the rotary angle positions Pk1 and Pk2 or the rotary angle range or the time period t between which or within which there is abutment contact between the abutment surfaces 6a, 7a. The determined rotational angle positions Pk1, Pk2, rotational angle ranges and/or time periods t are compared with setpoint values. If the press control detects a deviation from the target value, it changes the ram position in such a way that the deviation from the target value is reduced or eliminated with continuous monitoring.
  • the press controller does not use sensor 14 to determine the distance between stop surfaces 6a, 7a or a reference distance at a specific rotary angle position, but instead uses sensor 14 and reference surface 21 to determine the rotary angle positions without contact on the underside of upper tool half 4 Pk1 and Pk2 or the angle of rotation range or the time period t between which or within which the upper tool half 4 does not perform any vertical movement due to abutment contact of the abutment surfaces 6a, 7a (movement standstill).
  • the press controller evaluates the change over time in the reference distance c between the sensor 14 and the reference surface 21 in the area around the bottom dead center UT.
  • the determined rotational angle positions Pk1, Pk2, rotational angle ranges and/or time periods t are compared with setpoint values. If the press control detects a deviation from the target value, it changes the ram position in such a way that the deviation from the target value is reduced or eliminated with continuous monitoring.

Claims (40)

  1. Procédé d'opération d'une presse à découper (1) avec un coulisseau (2) qui travaille contre une plaque de serrage (3) en particulier fixe et dont la position de coulissement par rapport à la plaque de serrage (3) est réglable dans le fonctionnement comme prévu, le coulisseau (2) portant une première partie d'outil (4) et la plaque de serrage (3) portant une deuxième partie d'outil (5), les deux parties d'outil (4, 5) fournissant des surfaces de butée (6a, 7a) associées l'une à l'autre qui, lorsque l'outil (4, 5) est complètement fermé, forment une ou plusieurs butées fixes pour limiter la dimension de fermeture de l'outil (4, 5) à l'intérieur de l'outil,
    caractérisé en ce que, lors du fonctionnement comme prévu de la presse à découper (1), la distance (a, a1, a2, a3) des deux parties d'outil (4, 5) entre elles ou un paramètre (b1, b2, b3, c) représentant cette distance est surveillé à un point déterminé (P1, P2, P3) du mouvement du coulisseau, auquel l'outil (4, 5) n'est pas complètement fermé, et la position du coulisseau est modifiée en fonction du résultat de la surveillance.
  2. Procédé selon la revendication 1, dans lequel la distance (a, a1, a2, a3) des deux parties d'outil (4, 5) l'une par rapport à l'autre ou le paramètre (b1, b2, b3, c) représentant cette distance est surveillé en un point (P1, P2, P3) du mouvement du coulisseau qui est plus proche du point mort bas (UT) du mouvement du coulisseau que du point mort haut du mouvement du coulisseau, en particulier juste avant ou juste après le point mort bas (UT).
  3. Procédé selon la revendication 2, dans lequel la distance (a, a1, a2) entre les deux parties d'outil (4, 5) ou le paramètre (b1, b2, c) représentant cette distance est surveillé en un point (P1, P2) du mouvement du coulisseau où l'outil (4, 5) n'est pas en contact de déformation avec la pièce (13).
  4. Procédé selon la revendication 2, dans lequel la distance (a3) entre les deux parties d'outil (4, 5) ou le paramètre (b3) représentant cette distance est surveillé en un point (P3) du mouvement de coulisseau où l'outil (4, 5) est en contact de déformation avec la pièce (13).
  5. Procédé selon l'une des revendications précédentes, dans lequel le mouvement du coulisseau est généré par un entraînement à manivelle ou excentrique (8) .
  6. Procédé selon la revendication 5, dans lequel la distance (a, a1, a2, a3) des deux parties d'outil (4, 5) l'une par rapport à l'autre ou le paramètre (b1, b2, b3, c) représentant cette distance est surveillée à une position angulaire déterminée (P1, P2, P3) de la commande à manivelle ou excentrique (8), dans laquelle l'outil (4, 5) n'est pas complètement fermée, et la position du coulisseau est modifiée en fonction du résultat de la surveillance.
  7. Procédé selon la revendication 6, dans lequel la position angulaire (P1, P2, P3) se situe dans une plage de plus ou moins 35° autour du point mort bas (UT).
  8. Procédé selon l'une des revendications précédentes, dans lequel la distance (a, a1, a2, a3) des deux parties d'outil (4, 5) l'une par rapport à l'autre ou le paramètre (b1, b2, b3, c) représentant cette distance est maintenu constant au point déterminé (P1, P2, P3) du mouvement du coulisseau ou à la position angulaire déterminée (P1, P2, P3) pendant le fonctionnement comme prévu par réglage de la position du coulisseau en fonction du résultat de la surveillance.
  9. Procédé d'opération d'une presse à découper (1) avec un coulisseau (2) qui travaille contre une plaque de serrage (3) en particulier fixe et dont la position du coulisseau par rapport à la plaque de serrage (3) est réglable dans le fonctionnement comme prévu, le coulisseau (2) portant une première partie d'outil (4) et la plaque de serrage (3) portant une deuxième partie d'outil (5), les deux parties d'outil (4, 5) fournissant des surfaces de butée (6a, 7a) associées l'une à l'autre qui, lorsque l'outil (4, 5) est complètement fermé, forment une ou plusieurs butées fixes pour limiter la dimension de fermeture de l'outil (4, 5) à l'intérieur de l'outil, le mouvement du coulisseau de la presse à découper (1) étant généré par un entraînement à manivelle ou excentrique (8),
    caractérisé en ce que, pendant le fonctionnement comme prévu de la presse à découper (1), au moins l'une des butées fixes est surveillée pour le contact de butée, les positions angulaires de rotation (PK1, PK2) de l'entraînement à manivelle ou à excentrique de la presse à découper, entre lesquelles le contact de butée est présent, la plage d'angles de rotation de l'entraînement à manivelle ou à excentrique de la presse à découper, sur laquelle le contact de butée est présent, et/ou l'intervalle de temps (t), dans lequel le contact de butée est présent, sont déterminés et comparés à des valeurs de consigne, et la position du coulisseau est modifiée en fonction du résultat de la surveillance.
  10. Procédé selon la revendication 9, dans lequel un contact électrique (18a, 18b; 19a, 19b, 20) est établi ou fermé par le contact des surfaces de butée respectives (6a, 7a), lequel génère un signal de contact correspondant à la surveillance.
  11. Procédé selon l'une des revendications 9 à 10, dans lequel une déformation (D) d'un corps (7) qui fournit l'une des surfaces de contact (7a) d'une butée fixe, qui a lieu sous la pression de la butée, est détectée pour surveiller la butée fixe quant au contact de butée.
  12. Procédé selon l'une des revendications 9 à 11, dans lequel un paramètre (c, d, v, M, P) représentatif du contact de butée est surveillé.
  13. Procédé selon la revendication 12, dans lequel les corps (6, 6a, 14; 4, 14, 21) formées par les deux parties d'outil (4, 5) ou portées par celles-ci sont surveillés, en particulier sans contact, pour déterminer une position relative (c; d) l'une par rapport à l'autre représentant le contact de butée.
  14. Procédé selon l'une des revendications 12 à 13, dans lequel une ou plusieurs butées de référence formées par des surfaces de butée respectivement associées des deux parties d'outil, au contact desquelles la ou les butées fixes surveillées sont en contact de butée, sont surveillées pour un contact de butée, en particulier de telle manière, qu'un contact électrique est établi ou fermé par le contact des surfaces de butée de la butée de référence respective, ce qui génère un signal de contact, ou qu'une déformation d'un corps, qui a lieu sous la pression de la butée et qui fournit l'une des surfaces de contact de la butée de référence respective, est détectée.
  15. Procédé selon l'une des revendications 9 à 14, dans lequel le déplacement relatif (v) de la première partie d'outil (4) ou du coulisseau (2) par rapport à la structure fixe de la presse, à la plaque de serrage (3) ou à la deuxième partie d'outil (5) est surveillé dans la zone du point mort bas (UT) du mouvement du coulisseau et la position du coulisseau est modifiée en fonction du résultat de la surveillance.
  16. Procédé selon la revendication 15, dans lequel le temps (t) ou l'angle de rotation de l'entraînement à manivelle ou excentrique (8) est surveillé pendant lequel la première partie d'outil (4) ou le coulisseau (2) n'effectue pas de mouvement relatif par rapport à la structure de presse fixe, à la plaque de serrage (3) ou à la deuxième partie d'outil (5) dans la zone du point mort inférieur (UT) du mouvement du coulisseau, et la position du coulisseau est modifiée en fonction du résultat de la surveillance.
  17. Procédé selon l'une des revendications 9 à 16, dans lequel la courbe de couple d'entraînement (M) ou la courbe d'absorption de puissance (P) de l'entraînement de la presse (8) est surveillée dans la zone du point mort bas (UT) du mouvement du coulisseau et la position du coulisseau est modifiée en fonction du résultat de la surveillance.
  18. Procédé selon l'une des revendications 9 à 17, dans lequel, en fonctionnement comme prévu, la durée (t) du contact de butée d'une ou plusieurs butées fixes est maintenue constante, notamment de manière automatisée, par réglage de la position du poussoir en fonction du résultat de la surveillance.
  19. Procédé selon l'une des revendications 9 à 18, dans lequel l'outil de la presse à découper présente plusieurs butées fixes surveillées et, en fonctionnement comme prévu, une constellation déterminée de ces butées fixes surveillées est mise en contact de butée à chaque course de travail, en particulier de manière automatisée, par réglage de la position du coulisseau en fonction du résultat de la surveillance.
  20. Procédé selon l'une des revendications précédentes, dans lequel l'outil (4, 5) produit des empreintes pour des points de séparation de consigne dans des surfaces de tôle, en particulier des points de séparation de consigne dans des surfaces de tôle pour des couvercles de récipients avec languette à déchirer ou à enfoncer.
  21. Presse à découper (1) destinée à fonctionner selon les procédés de l'une des revendications 1 à 8, comprenant une plaque de serrage (3), en particulier fixe, et un coulisseau (2) qui travaille contre la plaque de serrage (3) et dont la position du coulisseau par rapport à la plaque de serrage (3) est réglable en fonctionnement comme prévu, le coulisseau (2) portant une première partie d'outil (4) et la plaque de serrage (3) portant une deuxième partie d'outil (5), les deux parties d'outil (4, 5) fournissant des surfaces de butée (6a, 7a) associées l'une à l'autre qui, lorsque l'outil (4, 5) est complètement fermé, forment une ou plusieurs butées fixes pour limiter la dimension de fermeture de l'outil (4, 5) à l'intérieur de l'outil,
    caractérisée en ce que la presse à découper (1) présente des dispositifs de commande de la position du coulisseau, avec lesquels, lors du fonctionnement comme prévu de la presse à découper (1), la distance (a, a1, a2, a3) des deux parties d'outil (4, 5) l'une par rapport à l'autre ou un paramètre (b1, b2, b3, c) peut être surveillé en un point déterminé (P1, P2, P3) du mouvement du coulisseau, auquel l'outil (4, 5) n'est pas complètement fermé, et la position du coulisseau peut être modifiée en fonction du résultat de la surveillance.
  22. Presse à découper (1) selon la revendication 21, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte que la distance (a, a1, a2, a3) des deux parties d'outil (4, 5) l'une par rapport à l'autre ou le paramètre représentant cette distance (b1, b2, b3, c) peut être surveillé en un point (P1, P2, P3) du mouvement du coulisseau qui est plus proche du point mort bas (UT) du mouvement du coulisseau que du point mort haut du mouvement du coulisseau, en particulier juste avant ou juste après le point mort bas (UT).
  23. Presse à découper (1) selon la revendication 22, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte que la distance (a, a1, a2) entre les deux parties d'outil (4, 5) ou le paramètre (b1, b2, c) représentant cette distance peut être surveillé en un point (P1, P2) du mouvement du coulisseau où l'outil (4, 5) n'est pas en contact de déformation avec la pièce (13).
  24. Presse à découper (1) selon la revendication 22, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte que la distance (a3) entre les deux parties d'outil (4, 5) ou le paramètre (b3) représentant cette distance peut être surveillé en un point (P3) du mouvement du coulisseau où l'outil (4, 5) est en contact de déformation avec la pièce (13).
  25. Presse à découper (1) selon l'une des revendications 21 à 24, dans laquelle la presse à découper (1) présente un entraînement à manivelle ou excentrique (8) pour générer le mouvement du coulisseau.
  26. Presse à découper (1) selon la revendication 25, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte que la distance (a, a1, a2, a3) des deux parties d'outil (4, 5) l'une par rapport à l'autre ou le paramètre (b1, b2, b3, c) représentant cette distance est déterminé pour une position angulaire déterminée (P1, P2, P3) de l'entraînement à manivelle ou excentrique (8), pour laquelle l'outil (4, 5) n'est pas complètement fermé, et la position du coulisseau peut être modifiée en fonction du résultat de la surveillance.
  27. Presse à découper (1) selon la revendication 26, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte que la surveillance peut avoir lieu pour une position angulaire (P1, P2, P3) dans une plage de plus ou moins 35° autour du point mort bas (UT).
  28. Presse à découper (1) selon l'une des revendications 21 à 27, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte que la distance (a, a1, a2, a3) des deux parties d'outil (4, 5) l'une par rapport à l'autre ou le paramètre (b1, b2, b3, c) au point déterminé (P1, P2, P3) du mouvement du coulisseau ou à la position angulaire déterminée (P1, P2, P3) peut être maintenu constant pendant le fonctionnement comme prévu en réglant la position du coulisseau en fonction du résultat de la surveillance.
  29. Presse à découper destinée à fonctionner selon les procédés selon l'une des revendications 9 à 20, comprenant une plaque de serrage (3), en particulier fixe, et un coulisseau (2) qui travaille contre la plaque de serrage (3) et dont la position du coulisseau par rapport à la plaque de serrage (3) est réglable en fonctionnement comme prévu, le coulisseau (2) portant une première partie d'outil (4) et la plaque de serrage (3) portant une deuxième partie d'outil (5), les deux parties d'outil (4, 5) fournissant des surfaces de butée (6a, 7a) associées l'une à l'autre qui, lorsque l'outil (4, 5) est complètement fermé, forment une ou plusieurs butées fixes pour limiter la dimension de fermeture de l'outil (4, 5) à l'intérieur de l'outil, la presse à découper (1) comportant un entraînement à manivelle ou excentrique (8) pour générer le mouvement du coulisseau,
    caractérisée en ce que la presse à découper (1) présente des dispositifs de commande de la position du coulisseau, à l'aide desquels, lors du fonctionnement comme prévu de la presse à découper (1), au moins l'une des butées fixes peut être surveillée quant au contact avec la butée, les positions angulaires de rotation (PK1, PK2) de l'entraînement à manivelle ou excentrique de la presse à découper, entre lesquelles le contact de butée est présent, la plage d'angles de rotation de l'entraînement à manivelle ou excentrique de la presse à découper, sur laquelle le contact de butée est présent, et/ou l'intervalle de temps (t) sur lequel le contact de butée est présent, sont déterminés et comparés à des valeurs de consigne, et la position du coulisseau peut être modifiée en fonction du résultat de la surveillance.
  30. Presse à découper (1) selon la revendication 29, dans laquelle l'outil (4, 5) est conçu de telle sorte que le contact des surfaces de butée (6a, 7a) d'une ou de plusieurs butées fixes établit ou ferme un ou plusieurs contacts électriques (18a, 18b ; 19a, 19b, 20) qui génèrent un signal de contact (KS) servant à la surveillance.
  31. Presse à découper (1) selon l'une des revendications 29 à 30, dans laquelle l'outil (4, 5) est conçu de telle sorte qu'une déformation (D) d'un corps (7), qui fournit l'une des surfaces de contact (7a) d'une butée fixe, qui a lieu sous la pression de la butée, peut être détectée pour surveiller le contact de la butée fixe, en particulier au moyen de jauges de contrainte (17) et/ou d'éléments piézoélectriques.
  32. Presse à découper (1) selon l'une des revendications 29 à 31, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte qu'un paramètre (c, d, v, M, P) représentant le contact de butée peut être surveillé.
  33. Presse à découper (1) selon la revendication 32, les dispositifs de commande de la position du coulisseau étant conçus de telle sorte que les corps (6, 6a, 14; 4, 14, 21) formés par les deux parties d'outil (4, 5) ou portés par celles-ci peuvent être surveillés, en particulier sans contact, quant à une position relative (c; d) l'un par rapport à l'autre représentant le contact de butée.
  34. Presse à découper selon l'une des revendications 32 à 33, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte qu'une ou plusieurs butées de référence formées par des surfaces de butée respectivement associées des deux parties d'outil, pour le contact de butée desquelles la ou les butées fixes surveillées sont en contact de butée, peuvent être surveillées pour le contact de butée, en particulier de manière à ce que le contact des surfaces de butée de la butée de référence respective établisse ou ferme un contact électrique qui génère un signal de contact, ou à ce qu'une déformation d'un corps qui fournit l'une des surfaces de contact de la butée de référence respective se produisant sous la pression de la butée, puisse être détectée.
  35. Presse à découper (1) selon l'une des revendications 29 à 34, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte que la course de déplacement relative (v) de la première partie d'outil (4) ou du coulisseau (2) par rapport à la structure de presse fixe, à la plaque de serrage (3) ou à la deuxième partie d'outil (5) peut être surveillée dans la zone du point mort bas (UT) du déplacement du coulisseau et que la position du coulisseau peut être modifiée en fonction du résultat de la surveillance.
  36. Presse à découper (1) selon la revendication 35, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte que le temps (t) ou l'angle de rotation de l'entraînement à manivelle ou excentrique (8) peut être surveillé, pendant lequel la première partie d'outil (4) ou le coulisseau (2) n'effectue pas de mouvement relatif par rapport à la structure fixe de la presse, à la plaque de serrage (3) ou à la deuxième partie d'outil (5) dans la zone du point mort bas (UT) du mouvement du coulisseau, et la position du coulisseau peut être modifiée en fonction du résultat de la surveillance.
  37. Presse à découper (1) selon l'une des revendications 29 à 36, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte que courbe de couple d'entraînement (M) ou la courbe d'absorption de puissance (P) de l'entraînement à manivelle ou excentrique (8) peut être surveillée dans la zone du point mort bas (UT) du mouvement du coulisseau et que la position du coulisseau peut être modifiée en fonction du résultat de la surveillance.
  38. Presse à découper (1) selon l'une des revendications 29 à 37, dans laquelle les dispositifs de commande de la position du coulisseau sont conçus de telle sorte qu'en fonctionnement comme prévu la durée (t) du contact avec une ou plusieurs butées fixes peut être maintenue constante, en particulier de manière automatisée, par réglage de la position du coulisseau en fonction du résultat de la surveillance.
  39. Presse à découper selon l'une des revendications 29 à 38, dans laquelle l'outil de la presse à découper présente plusieurs butées fixes surveillées et les dispositifs de commande de la position du coulisseau sont conçus de telle sorte que, en fonctionnement comme prévu, une constellation déterminée de ces butées fixes surveillées peut être mise en contact de butée, notamment de manière automatisée, par réglage de la position du coulisseau en fonction du résultat de la surveillance à chaque course de travail.
  40. Utilisation de la presse à découper (1) selon l'une des revendications 21 à 39 pour générer des découpes pour des points de séparation de consigne dans des surfaces de tôle, en particulier pour des points de séparation de consigne dans des surfaces de tôle pour des couvercles de récipients avec languette à déchirer ou à enfoncer.
EP18743747.0A 2018-07-16 2018-07-16 Procédé de fonctionnement d'une poinçonneuse et poinçonneuse pour le fonctionnement selon ce procédé Active EP3814125B1 (fr)

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CH716048B1 (de) * 2019-04-09 2024-02-15 Dietmar Kramer Dr Sc Techn Eth Phd Verfahren sowie eine Messeinrichtung zum Ausmessen von Utensilien für Pressen.
DE102021127549A1 (de) * 2021-10-22 2023-04-27 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Überwachen einer Fertigungslinie zum Herstellen von Bauteilen, insbesondere für Kraftfahrzeuge

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EP0353479B1 (fr) * 1988-07-28 1992-12-09 Bruderer Ag Procédé et dispositif pour réduire la charge de presse dans une presse à découper comportant des butées fixes

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DE8813774U1 (fr) * 1988-11-03 1990-03-01 Otto Kaiser Gmbh & Co Kg, 7518 Bretten, De
JPH0729223B2 (ja) * 1991-06-28 1995-04-05 アイダエンジニアリング株式会社 プレス機械の下死点位置補正装置
EP0732194B1 (fr) 1995-03-17 2000-02-16 Bruderer Ag Procédé et dispositif de mesure et de réglage de la position du coulisseau d'une presse à découper à grande vitesse
JP3330016B2 (ja) * 1996-04-11 2002-09-30 アイダエンジニアリング株式会社 スライドの下死点位置補正装置
DE102006059796A1 (de) * 2006-12-15 2008-06-19 Müller Weingarten AG Verfahren und Vorrichtung zur Steuerung und Regelung von Stößellageabweichungen an servo-elektrischen Pressen
JP5052406B2 (ja) * 2008-05-12 2012-10-17 アイダエンジニアリング株式会社 下死点位置補正制御手段を備えたプレス機械
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JP6646637B2 (ja) * 2017-09-12 2020-02-14 アイダエンジニアリング株式会社 しわ発生検出装置、ダイクッション装置及び金型保護装置、並びにしわ発生検出方法、ダイクッション力自動設定方法及び金型保護方法

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EP0353479B1 (fr) * 1988-07-28 1992-12-09 Bruderer Ag Procédé et dispositif pour réduire la charge de presse dans une presse à découper comportant des butées fixes

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WO2020015815A1 (fr) 2020-01-23
SG11202100462QA (en) 2021-02-25
EP3814125A1 (fr) 2021-05-05
JP2021531170A (ja) 2021-11-18
US20210291474A1 (en) 2021-09-23
ES2939825T3 (es) 2023-04-27

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