EP3525950A1 - Butée arrière pour cintreuse et procédé de positionnement d'une telle butée arrière - Google Patents

Butée arrière pour cintreuse et procédé de positionnement d'une telle butée arrière

Info

Publication number
EP3525950A1
EP3525950A1 EP17800359.6A EP17800359A EP3525950A1 EP 3525950 A1 EP3525950 A1 EP 3525950A1 EP 17800359 A EP17800359 A EP 17800359A EP 3525950 A1 EP3525950 A1 EP 3525950A1
Authority
EP
European Patent Office
Prior art keywords
stop
stop finger
backgauge
base unit
spring element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17800359.6A
Other languages
German (de)
English (en)
Other versions
EP3525950B1 (fr
Inventor
Gerhard Angerer
Klemens Freudenthaler
Florian Hausmann
Matthias HÖRL
Nenad KOVJENIC
Florian Maier
Verena STEININGER
Helmut Theis
Manfred WALDHERR
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf Maschinen Austria GmbH and Co KG
Original Assignee
Trumpf Maschinen Austria GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trumpf Maschinen Austria GmbH and Co KG filed Critical Trumpf Maschinen Austria GmbH and Co KG
Publication of EP3525950A1 publication Critical patent/EP3525950A1/fr
Application granted granted Critical
Publication of EP3525950B1 publication Critical patent/EP3525950B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B21D5/002—Positioning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/004—Bending sheet metal along straight lines, e.g. to form simple curves with program control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/26—Stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means

Definitions

  • the invention relates to a backgauge for a Häanschlagpositioniersystem a bending machine, and a method for positioning the backgauge.
  • a backgauge for a plate bending machine in which a stop finger is displaceable relative to a base unit.
  • the stop finger can be locked by means of a locking pin, which can be moved into a corresponding hole in a guide rail.
  • EP 2 915 604 AI a backgauge is known in which a stopper finger is displaceable relative to a base unit when a predetermined force is exceeded and thereby solves a magnetic fixation.
  • the known from EP 2 915 604 AI backgauge has the disadvantage that the predetermined force for releasing the magnetic fixation must be chosen to be correspondingly low in order to ensure the maintenance of the safety function.
  • the necessarily weak dimensioning of the magnetic fixation can cause it to be solved unintentionally when attacking sheet metal workpieces.
  • the object of the present invention was to overcome the disadvantages of the prior art and to provide an apparatus and a method by means of which a backgauge can be positioned with increased safety, while retaining the full functionality of the backgauge.
  • a backgauge is formed for a backgauge positioner system of a bending machine.
  • the backgauge comprises an abutment finger on which at least one abutment surface is formed, a base unit which is designed for coupling to the backstop positioner system, wherein the abutment finger is coupled to the base unit by means of a linear guide and the abutment finger is coupled relative to the base unit between a forwardly displaced working position and a retraction position is displaceable.
  • the stop finger and the base unit are coupled to a rear part device, in particular a first spring element, by means of which the stop finger is biased into its working position.
  • a switchable locking device is formed, by means of which the stop finger is optionally locked in the working position or released for displacement, in particular against the spring force of the first spring element, in its retracted position.
  • An advantage of the inventive design of the back gauge is that the stop finger is biased by the first spring element in its working position.
  • the stop finger is moved back into its position after being displaced from its working position as soon as an impact force causing the displacement is removed again.
  • the stop finger can be locked by means of the locking device either in its working position or released for displacement against the spring force of the first spring element.
  • a stop mode can be realized by the locking device, in which the stop finger is locked in its working position and thus formed to stop bending sheet metal workpieces.
  • the backgauge is in a so-called safety mode or travel mode in which the stopper finger can be moved relative to the base unit, wherein only the spring force of the first spring element must be overcome.
  • the spring force of the first spring element is chosen to be correspondingly low, since in a movement of the back gauge in addition to the spring force of the first spring element, the inertia of the stop finger acts on the obstacle.
  • the locking device comprises a holding part, in particular an electromagnet, wherein the stop finger can be locked relative to the base unit by applying activation energy in the holding part.
  • a holding part in particular an electromagnet
  • the stop finger can be locked relative to the base unit by applying activation energy in the holding part.
  • the locking device has a mechanically acting locking.
  • the stop finger can be fixed in its position relative to the base unit by means of the mechanically acting locking unit.
  • the mechanically acting locking unit of the locking device is designed to produce a positive connection between the stop finger and the base unit.
  • a form-fitting connection can be achieved, for example, by means of a shaped element which is arranged on the basic unit and which is inserted into a corresponding recess of the stop finger.
  • the mold element has a wedge surface. It can thereby be achieved that the positioning accuracy of the back stop unit can be increased, since the stop finger can be pressed by the wedge surface into its working position.
  • the shaped element can be designed, for example, in the form of a passport.
  • a dowel pin may for example also have a conical shape in order to achieve an exact positioning of the stop finger can.
  • the mold element can be inserted by means of various trained actuators in the recess of the stop finger.
  • the actuators can be designed, for example, in the form of pneumatic or hydraulic cylinders, electric linear or rotary drives or electromagnets.
  • the mechanically acting locking unit comprises a clamping device and not a form-fitting, but a frictional connection is made.
  • the positive connection can be made by means of a micro-toothing.
  • a second spring element is formed, which is coupled with the interposition of the locking device with the stop finger and the base unit, wherein when the locking device of the stop finger is fixed by means of the second spring element in its working position.
  • the second spring element has a greater spring stiffness than the first spring element and / or that the second spring element has a greater pretension than the first spring element.
  • the advantage here is that the stop finger is biased by means of the first spring element only by a small application of force in its working position and that selective connection of the second spring element, the bias of the stop finger can be increased in its working position by a multiple.
  • the first spring element may, for example, have a spring stiffness between 0.01 N / mm and 1 N / mm, in particular between 0.1 N / mm and 0.5 N / mm, preferably approximately 0.2 N / mm.
  • the first spring element may have a pretension between 1 N and 15 N, in particular between 3 N and 10 N, preferably approximately 7 N.
  • the second spring element may for example have a spring stiffness between 0.1 N / mm and 30 N / mm, in particular between 1 N / mm and 10 N / mm, preferably in about 2 N / mm.
  • the first spring element may have a preload between 20 N and 600 N, in particular between 160 N and 450 N, preferably in about 250 N to 300 N.
  • the retaining part of the locking device is held immovably relative to the base unit in the main adjustment direction and that the locking device has a counter element interacting with the retaining part, which is arranged on a guide rod, wherein the Guide rod is mounted at least on a first bearing jaws, wherein the counter-element is arranged at an end region of the guide rod and the second spring element is arranged with respect to the first bearing jaws opposite to the counter-element on the guide rod.
  • the electromagnet is held immovably relative to the base unit and that the locking device has a cooperating with the electromagnet counter element which is arranged on a guide rod, wherein the guide rod is mounted on a first bearing jaws and on a second bearing jaws , which are arranged at a distance from each other, wherein the
  • the guide rod is mounted with a bearing clearance in the first bearing jaws, so that a slight angular rotation and / or radial displacement between the guide rod and the first bearing jaws is possible.
  • the guide rod is additionally mounted on a second bearing jaws, wherein the first bearing jaws and the second bearing jaws are arranged at a distance from one another.
  • a stop element for the second spring element is formed on the guide rod, wherein the second spring element is designed as a compression spring and is received between the first bearing jaw and the stop element on the guide rod, whereby the stop element by means of the second Spring element away from the first bearing jaws and thus the counter-element is biased towards the first bearing jaws out.
  • the second spring element can be positioned as easily as possible in the backgauge.
  • the stop finger can be biased in its working position.
  • the holding part is designed as an electromagnet and the counter element is designed as cooperating with the electromagnet disc, which is arranged on the front side of the guide rod, wherein the electromagnet and the counter element abut contact surfaces against each other.
  • the advantage here is that such a connection can be switched with a very short switching time.
  • the electromagnet and / or the counter-element are received on a joint bearing, so that the contact surfaces are aligned parallel to each other.
  • the advantage here is that by this measure the air gap between the two contact surfaces can be reduced and thereby the holding force of the magnet can be increased.
  • the joint bearing comprises a universal joint or a ball joint.
  • the advantage here is that such joint bearings are easy to manufacture and also have a high resistance.
  • a buffer element which serves to damp the stop finger during the process in the retracted position.
  • This measure protects the backgauge.
  • the linear guide is designed in the form of a recirculating ball guide.
  • a recirculating ball guide has the advantage that it as possible is smooth and therefore the spring force of the first spring element can be chosen as low as possible.
  • the linear guide comprises a guide carriage, which is rather coupled to the stop finger and comprises a guide rail, which is coupled to the base unit.
  • the base unit it is possible for the base unit to have a base part which is coupled to the rear stop positioning system and has a lid part which is fastened to the base part by means of fastening means.
  • the two bearing jaws are fastened to the cover part.
  • the advantage here is that the bearing jaws are easily accessible by this measure.
  • the guide rail is fastened to the cover part.
  • two of the second spring elements are arranged parallel to one another. This has the advantage that the bias of the stop finger can be increased to its working position, wherein the individual second spring elements do not have to have an excessively high spring stiffness, but the spring stiffness of the two second spring elements is added. This can save weight.
  • a force sensor is formed, which is designed to detect the magnitude of an action force.
  • the abutment force of a sheet metal workpiece to be struck can be detected. This makes it possible to signal the machine operator when the sheet metal workpiece with a predefined abutment force abuts the stop finger and thus correct positioning of the sheet metal workpiece is reached.
  • the first bearing jaws of the abutment surface is arranged closer than the second bearing jaws.
  • At least one indicator element is arranged on the stop finger for indicating the state of the locking device.
  • the advantage here is that the operator of the state of the locking device can be displayed by the display element and the machine operator gets notified whether the bending machine is ready to strike the sheet metal workpiece to be bent.
  • a sensor element is formed, which serves to detect a relative movement and / or relative position between the stop finger and the base unit. The advantage here is that by this measure a displacement of the stop finger relative to the base unit can be detected and thereby a movement of the back gauge can be stopped in time.
  • the sensor element is designed in the form of an inductive sensor.
  • an inductive sensor has a high detection accuracy and a short detection time.
  • An advantage of the method according to the invention is that when positioning the back stop a so-called travel mode or safety mode can be set, in which the stop finger is displaceable relative to the base unit. This allows the stop finger to touch an obstacle, such as the hand of a machine operator move relative to the base unit so as not to injure the operator.
  • the displacement is chosen in particular so large that when detecting the touch of the stop finger on the obstacle, the movement of the back gauge can be stopped within this displacement.
  • the relative movement and / or relative position between the stop finger and the base unit is monitored and upon detection of a relative movement between the stop finger and the base unit during the process of back gauge, the movement is stopped abruptly.
  • the advantage here is that by this measure the necessary displacement of the stop finger relative to the base unit can be kept as low as possible.
  • Fig. 1 is a perspective view of an embodiment of a bending machine
  • FIG. 2 is a perspective view of an embodiment of a backgauge in a view obliquely from above.
  • FIG. 3 is a perspective view of an embodiment of a backgauge in a view obliquely from below;
  • Figure 4 is a sectional view of the back gauge in a first sectional plane, wherein the stop finger is in the working position.
  • Figure 5 is a sectional view of the back gauge in the first sectional plane, wherein the stop finger is in the retracted position and the locking device is not activated.
  • a perspective view of another embodiment of the backgauge with only a first bearing jaws a schematic sectional view of another embodiment of the back gauge with only a first bearing jaws and a guide rod which is equipped with a ball joint;
  • a workpiece processing machine 1 in the form of a bending machine 2, in particular a press brake 3 shown.
  • the workpiece processing machine 1 or press brake 3 is provided for processing, in particular for bending a workpiece 4.
  • the press brake 3 has a perpendicular to a footprint 5 aligned, fixed table bar 6.
  • the bending machine 2 or the illustrated press brake 3 comprises a pressing beam 7, which is adjustable or movable relative to the table beam 6 in the vertical direction by means of drive means 8, for example hydraulic cylinders 9.
  • the machining or forming of a workpiece 4 is accomplished in the press brake 3 according to the embodiment shown in FIG. 1 by means of a lower bending tool 10 and an upper bending tool 11.
  • the lower bending tool 10 for example a so-called bending die
  • the upper bending tool 11 or a so-called bending punch can be arranged in an upper tool holder 13 of the pressing beam 7.
  • the bending tools 10, 11 are interchangeably arranged and held in the tool holders 12, 13 so that suitable bending tools 10, 11 can be selected or used for a respective machining or forming of a workpiece 4.
  • suitable bending tools 10, 11 can be selected or used for a respective machining or forming of a workpiece 4.
  • a plurality of lower bending tools 10 and upper bending tools 11 are arranged in the operation of the press brake 3 in the tool holders, for example, in order to make 4 different bending operations in successive forming or bending operations on a workpiece.
  • only one lower bending tool 10 and one upper bending tool 11 are shown in the exemplary embodiment according to FIG. 1.
  • at least one automatically controlled backgauge positioning system 14 with at least one back stop 15 for positioning the workpiece 4 is also shown.
  • the backgauge 15 is shown only schematically and will be described or illustrated in more detail in the other figures.
  • two backgauge positioning systems 14, each having a backgauge 15, are shown by way of example.
  • the Schuantschpositioniersy systems 14 shown in FIG. 1 or Hinteranelle 15 are arranged in a free space at a rear side of the table beam 6 of the bending machine 2.
  • the one or more back stops 15 can each be adjusted or moved in a provided for positioning a workpiece 4 stop position 16. If a backgauge 15 is adjusted to a stop position 16, a workpiece 4 to be machined can then be applied to a stop face 17 of a stop finger 18 of the back stop 15 from a front side pointing away from the press room or a workpiece feed side of the workpiece processing machine 1. Thereby, the workpiece 4 can be positioned in a desired position between the two bending tools 10, 11 in order to be able to perform a bending operation at a desired position.
  • stop fingers 18 shown by way of example in FIG. 1 have only one stop surface 17. In principle, embodiments of stop fingers 18 may also include more than one stop surface 17, as well as additional bearing surfaces for workpieces 4.
  • the Hinteranschlagpositioniersysteme 14 or backgauges 15 shown in FIG. 1 are usually adjusted or moved by means of drive not shown in detail.
  • the drive arrangements can include, for example, guideways, as well as actuators such as electric motors, in particular servomotors, and are driven automatically.
  • control device 19 may be provided.
  • the control device 19 may comprise a plurality of components, for example a plurality of processors or computer components, input means for inputting control commands, output means for displaying information, etc.
  • the control device 19 further control components is connected, for example, with mobile input and output means via a network, or via the Internet.
  • an adjustment or an automated method of the back stops 15 along at least one Hauptverstellcardi 20 may be provided.
  • the back stops 15 can also be adjusted automatically in the longitudinal direction of the bending machine 2 or with respect to its height.
  • the backgauge 15 is shown in a perspective view obliquely from above or obliquely from below.
  • the back stop 15 is shown cut in a first sectional plane, wherein different positions of the back stop 15 are shown.
  • the backgauge 15 is shown in further sectional views.
  • the same reference numerals or component designations are used as in the respective preceding figures. In order to avoid unnecessary repetition, reference is made in each case to the detailed description in the preceding figures, wherein the following description is based on the illustration in FIGS. 2 to 8.
  • the backgauge 15 has a stop finger 18 and a base unit 21.
  • the stop finger 18 is displaceable relative to the base unit 21 in the main adjustment direction 20 this added.
  • the base unit 21 has a coupling device 22, by means of which the back gauge 15 is attached to the backgauge positioning system 14.
  • the base unit 21 has a base part 23 on which a cover part 24 is arranged.
  • the coupling device 22 is preferably arranged on the base part 23 of the basic unit 21.
  • the cover part 24 can be arranged on the base part 23 of the basic unit 21 by means of fastening means 25, in particular screws.
  • the stop finger 18 has an exchangeable fingertip 26 on which the stop surface 17 is formed.
  • the stop surface 17 is preferably arranged at right angles to the main adjustment direction 20.
  • various recesses 27 are formed, which likewise have a stop surface 17.
  • the stop finger 18 is in its advanced working position 28, which may also be referred to as a basic position.
  • a linear guide 29 is formed, by means of which the stop finger 18 is displaceably received on the basic unit 21.
  • the linear guide 29 is designed such that the stop finger 18 relative to the base unit 21 in the Hauptverstellcardi 20 between the working position 28 and the retracted position 30 is displaceable.
  • the linear guide 29 comprises a guide carriage 31 which is slidably received in the main adjustment direction 20 on a guide rail 32.
  • the guide carriage 31 may be mounted on the guide rail 32 by means of a recirculating ball bearing.
  • a sliding bearing such as a dovetail guide is formed between the guide carriage 31 and the guide rail 32.
  • two of the guide carriages 31 are formed and are arranged at a distance 33 from each other.
  • the formation of two guide carriages 31 has the advantage that the stop finger 18 can be stressed with an increased force, in particular an increased bending load.
  • a first spring element 34 is provided, by means of which the stop finger 18 is biased into its working position 28.
  • the first spring element 34 is designed in particular as a compression spring and arranged between an end face 35 of the stop finger 18 and an end face 36 of the basic unit 21.
  • a further rear part device such as a pneumatic cylinder, a gas spring, an electric linear drive and the like may be provided.
  • a guide pin 37 is formed, on which the first spring element 34 is accommodated.
  • the guide pin 37 may be rigidly coupled to the stop finger 18, or be included on this.
  • a stop bar 38 is formed, on which the end face 36 is formed for abutment of the first spring element 34.
  • a passage 39 may be formed, through which the guide pin 37 is passed.
  • a securing ring 40 in particular an axial securing ring, may be arranged on the guide pin 37.
  • the stop finger 18 can be held in its working position 28, wherein in the working position 28 of the stop finger 18 the securing ring 40 rests against the stop bar 38.
  • a locking device 41 is formed, by means of which the stop finger 18 is fixable in its working position 28.
  • the locking device 41 may include a holding part 42 a, which cooperates with a counter element 43. In the present embodiment it can be provided that the holding part 42a is formed in the form of an electromagnet 42b.
  • the electromagnet 42b is accommodated on a magnet holder 44.
  • the magnet holder 44 can be coupled by means of fastening means 45, in particular screws, with the cover part 24 of the basic unit 21.
  • the electromagnet 42b is received rigidly or non-displaceably on the basic unit 21.
  • the counter element 43 is motion-coupled with the stop finger 18.
  • the counter element 43 is embodied in the form of a magnet, which cooperates with the electromagnet 42b.
  • the counter element 43 is received on a guide rod 46, wherein the guide rod 46 is slidably received on a first bearing jaws 47 and on a second bearing jaws 48 in Hauptverstellcardi 20.
  • the first bearing jaw 47 and the second bearing jaw 48 are arranged at a distance 49 from each other and secured to the stop finger 18.
  • the counter element 43 is preferably arranged on an end region 50 of the guide rod 46.
  • the end region 50 of the guide rod 46 projects freely with respect to the first bearing block 47.
  • a second spring element 51 is arranged on the guide rod 46 between the first bearing jaw 47 and the second bearing jaw 48.
  • the second spring element 51 may in particular be designed as a compression spring and abut the first bearing bar 47 as well as a stop element 52 which is arranged on the guide rod 46. Due to the spring force of the second spring element 51, the stop element 52, which is arranged between the first bearing jaw 47 and the second bearing jaw 48, is pressed in the direction of the second bearing jaw 48. This will also do that Counter-element 43 is pressed in the direction of the second bearing jaws 48 and the first bearing jaws 47. In other words, both the first bearing jaw 47 and the second bearing jaw 48, which are coupled by means of fastening means 53 with the stop finger 18, are urged toward the counter element 43 by the second spring element 51.
  • a shifted position is shown in Fig. 6.
  • This shift occurs when the contact force 54 is greater than a maximum permissible contact force, whereby the backgauge 15 would be damaged.
  • a buffer element 55 is formed, which is arranged between the stop finger 18 and the stop bar 38 and is designed to buffer a shock.
  • the stop finger 18 can be moved relative to the base unit 21, as shown in Fig. 5. If the contact force 54 is now removed again, then the stop finger 18 shifts by the spring force of the first spring element 34 back to its working position 28.
  • a displacement 56 of the stop finger 18 between the working position 28 and the retraction position 30 is preferably chosen so large that at a predetermined travel speed of the back gauge 15 in Hauptverstellcardi 20 and impact of the stopper finger 18 at an obstacle enough travel remains to slow the Hinteran- schlagpositioniersy system 14 with a maximum allowable acceleration.
  • a sensor element 57 is arranged on the back stop 15, by means of which a relative movement between the stop finger 18 and the base unit 21 or a relative position between the stop finger 18 and the base unit 21 can be detected.
  • the control device 19 can be signaled a collision with an object.
  • a force sensor 60 is arranged, which is designed to detect the biasing force of the second spring element 51.
  • the force measured at the force sensor 60 is the force of the second spring member 51 less the engagement force 54 decreased by the force of the first spring member 34. If now the acting force 54 is equal to the spring force of the first spring element 34 and the second spring element 51, then a force of zero magnitude is measured on the force sensor 60. If the contact force 54 is further increased, the guide rod 46 completely lifts off from the force sensor 60 and the force sensor 60 continues to measure the force zero.
  • a display element 61 are formed, by means of which the activation of the locking device 41 can be displayed.
  • the display element 61 may be formed, for example, in the form of LED displays.
  • the action force 54 is determined by means of the force sensor 60, and this is likewise indicated on the display element 61 when the action force 54 is reached in a predetermined force range.
  • the backgauge 15 In a special bending mode for bending particularly thin or particularly large workpieces 4, provision may be made for the backgauge 15 to be designed to pick up the workpiece 4. This can be realized in particular by moving the back stop 15 as far as possible to the table beam 6 in order to insert the workpiece 4. Subsequently, the workpiece 4 is placed on the back gauge 15 and pressed against the stop surface 17. By means of the force sensor, the contact force 54 is detected on the stop surface 17, and subsequently the back stop 15 moved away from the table bar 6 in its stop position 16, wherein the workpiece 4 constantly rests on the back gauge 15 and thereby excessive bending of the workpiece 4 is held back.
  • FIG. 8 shows in a perspective view a further possible construction of the back gauge 15, again using the same reference numerals or component designations for the same parts as in the preceding FIGS. 1 to 7. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 7 or reference.
  • the guide rail 32 provision can be made for the guide rail 32 to be arranged on the base unit 21 of the rear stop 15 and for the stop finger 18 to be accommodated displaceably relative to the base unit 21 by means of the guide carriage 31.
  • the first spring element 34 is shown schematically, which biases the stop finger 18 in its working position 28.
  • the first bearing jaws 47 with the Stop finger 18 is coupled and is displaceable together with this.
  • the guide rod 46 is accommodated, which is displaceable relative to the first bearing jaw 47.
  • the stopper member 52 is formed.
  • the second spring element 51 is received or prestressed between the first bearing jaw 47 and the stop element 52.
  • the stop element 52 is pushed away from the first bearing jaw 47.
  • the counter element 43 is coupled to the guide rod 46.
  • the counter element 43 cooperates with the electromagnet 42 b, which is coupled to the base unit 21.
  • a contact surface 62 of the electromagnet 42b interacts with a contact surface 63 of the counter element 43.
  • the counter element 43 is coupled to the guide rod 46 via a joint bearing 64.
  • the joint bearing 64 is designed in the form of a universal joint.
  • Such a trained universal joint or joint bearing 64 can of course be used not only for receiving the counter element 43, but it is also possible that the joint bearing 64 is adapted to receive the electromagnet 42 b and between the electromagnet 42 b and the base unit 21 is arranged. However, such a design of the back gauge 15 is not shown separately.
  • FIG. 9 shows a schematic illustration of a further exemplary embodiment of the back gauge 15, with the same reference numerals or component designations being used again for the same parts as in the preceding FIGS. 1 to 8.
  • the counter element 43 is rigidly coupled to the guide rod 46 and that the complete guide rod 46, together with the counter element 43, is received in the first bearing jaw 47 in a slightly pivotable manner.
  • the bearing point between the first bearing jaw 47 and the guide rod 46 is designed in the form of a game bearing, so that a small Winkelverschwenkung or a small radial displacement between the guide rod 46 and the first bearing jaw 47 can be compensated.
  • the joint bearing 64 is formed in the form of a ball head.
  • the contact surface 63 of the counter element 43 can be adapted to the contact surface 62 of the electromagnet 42b.
  • the force sensor 60 in the form of a tensile force measuring unit is formed between the electromagnet 42b and the base unit 21.
  • FIG. 10 shows a further exemplary embodiment of the rear stop unit 15, again using the same reference numerals or component designations for the same parts as in the preceding FIGS. 1 to 9.
  • reference numerals or component designations for the same parts as in the preceding FIGS. 1 to 9.
  • the locking device 41 is designed to lock the guide rod 46 by means of a form-locking connection.
  • a notch 65 may be arranged in the guide rod 46, by means of which a shaped element 66 cooperates, the shaped element 66 being designed for insertion into the notch 65.
  • the mold element 66 is inserted in the securing direction 67 in the notch 65, whereby the guide rod 46 is locked.
  • the stop finger 18 is thereby positioned in its working position 28 that on the base unit 21, an end stop is formed and the stop finger 18 is pressed by means of the first spring element 34 against this end stop.
  • the shaped element 66 has a wedge surface 68.
  • an adjusting device 69 is formed, by means of which the shaped element 66 can be displaced in the securing direction 67.
  • the securing direction 67 is formed transversely to the main adjustment direction 20.
  • the adjusting device 69 may also comprise an electromagnet 42 b, by means of which the mold element 66 can be pushed into the notch 65.
  • the mold element 66 is received on a guide rod, which is displaceably mounted in the electromagnet 42b.
  • a spring element may be formed, by means of which, upon release of the electromagnet 42b, the mold element 66 can be brought out of engagement with the notch 65 again.
  • FIG. 11 another embodiment of the back gauge 15 is again shown wherein in turn the same reference numerals or component names are used as in the previous figures 1 to 10 for the same parts. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 10 or reference.
  • the holding part 42a of the fixing device 41 is designed in the form of a pneumatic cylinder which has a pressing head 70 which cooperates with a pressing projection 71 of the stop finger 18.
  • the pressing head 70 By the pressing head 70, the stopper finger 18 can be pressed against an end stop and thereby wouldn biased in its working position 28.
  • the force sensor 60 is designed as an end stop against which the stop finger 18 is pressed.
  • the contact force 54 can be detected.
  • a buffer element 72 may be formed, which may be arranged next to the force sensor 60 and protects the force sensor 60 from excessive impact loads.
  • the buffer element 72 may be formed, for example, in the form of a hydraulic shock absorber.
  • the pneumatic cylinder When the pneumatic cylinder is extended and the drive head 70 is pressed against the stop finger 18, the pneumatic cylinder itself can act as a second spring element 51, since the air acting in the pneumatic cylinder is compressible. By presetting the pressure in the pneumatic cylinder, the spring force of the second spring 51 can thus be adjusted.
  • the pneumatic cylinder In order to deactivate the locking device 41, the pneumatic cylinder is moved into its retracted position and thus the stop finger 18 is released for movement in the main adjustment direction 20, wherein only the small spring force of the first spring element 34 biases the stop finger 18 into its working position 28.
  • Stop finger 47 first bearing jaws
  • Control device 48 second bearing jaws

Landscapes

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

Abstract

L'invention concerne une butée arrière (15) destinée un système de positionnement de butée arrière d'une cintreuse. La butée arrière (15) comprend un doigt de butée (18), sur lequel est formée au moins une surface de butée (17), et une unité de base (21) conçue pour être accouplée au système de positionnement de butée arrière (14). Le doigt de butée (18) est accouplé à l'unité de base (21) au moyen d'un guide linéaire (29), et le doigt de butée (18) est mobile par rapport à l'unité de base (21) entre une position de travail (28) poussée vers l'avant et une position rétractée (30). L'invention est caractérisée en ce que le doigt de butée (18) et l'unité de base (21) sont accouplés à un premier élément à ressort (34) au moyen duquel le doigt de butée (18) est précontraint dans sa position de travail (28) et en ce qu'il est prévu un moyen de fixation à l'aide duquel sélectivement le doigt de butée (18) peut être bloqué dans la position de travail (28) ou est libéré pour se déplacer dans sa position rétractée (30) en s'opposant à la force élastique du premier élément à ressort (34).
EP17800359.6A 2016-10-14 2017-10-13 Cintreuse avec un système de positionnement d'une butée arrière avec une butée arrière et procédé de positionnement d'une telle butée arrière avec un système de positionnement d'une cintreuse Active EP3525950B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50921/2016A AT519203B1 (de) 2016-10-14 2016-10-14 Hinteranschlag für eine Biegemaschine
PCT/AT2017/060262 WO2018068074A1 (fr) 2016-10-14 2017-10-13 Butée arrière pour cintreuse et procédé de positionnement d'une telle butée arrière

Publications (2)

Publication Number Publication Date
EP3525950A1 true EP3525950A1 (fr) 2019-08-21
EP3525950B1 EP3525950B1 (fr) 2021-12-01

Family

ID=60381966

Family Applications (1)

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EP17800359.6A Active EP3525950B1 (fr) 2016-10-14 2017-10-13 Cintreuse avec un système de positionnement d'une butée arrière avec une butée arrière et procédé de positionnement d'une telle butée arrière avec un système de positionnement d'une cintreuse

Country Status (6)

Country Link
US (1) US11267030B2 (fr)
EP (1) EP3525950B1 (fr)
JP (1) JP7032393B2 (fr)
CN (1) CN109843461B (fr)
AT (1) AT519203B1 (fr)
WO (1) WO2018068074A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108637937B (zh) * 2018-05-14 2019-12-03 安徽省康宇水电机械成套设备有限公司 一种基于耦合电容器加工用固定装置
DE102018123035B4 (de) * 2018-09-19 2020-12-17 Bystronic Laser Ag Werkstückanschlag und Verfahren zur Werkstückhandhabung
AT523361B1 (de) 2019-12-20 2022-09-15 Trumpf Maschinen Austria Gmbh & Co Kg Abkantpresse zum Biegen von Werkstücken
KR102484767B1 (ko) * 2022-08-18 2023-01-04 주현식 금속 플레이트 절곡장치
CN116618482B (zh) * 2023-04-13 2024-01-05 杭州双睿机电有限公司 一种便于定位自动脱料的金属件折弯机
CN117324438B (zh) * 2023-12-01 2024-02-06 广东铝享家家居有限公司 一种铝制柜体弧形件折弯机

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US4089200A (en) * 1976-08-18 1978-05-16 Dynamics Research Corporation Gaging system
DE3739949C1 (en) * 1987-11-25 1989-03-16 Hewlett Packard Gmbh Stop device for a plate-bending machine
JPH0553723U (ja) 1991-12-19 1993-07-20 株式会社小松製作所 プレスブレーキの安全装置
DE9315209U1 (de) * 1993-10-08 1995-02-16 Trumpf Gmbh & Co, 71254 Ditzingen Abkantpresse
FR2825036B1 (fr) * 2001-05-23 2003-09-19 Amada Europ Sa Presse plieuse pour toles, munie d'un dispositif mobile de butee
DE50303115D1 (de) * 2002-05-13 2006-06-01 Trumpf Maschinen Austria Gmbh Fertigungseinrichtung mit einer biegepresse, und verfahren zum betrieb der fertigungseinrichtung
US6938454B2 (en) 2002-05-13 2005-09-06 Trumpf Maschinen Austria Gmbh & Co. Kg. Production device, especially a bending press, and method for operating said production device
AT503790B1 (de) * 2006-07-25 2008-01-15 Trumpf Maschinen Austria Gmbh Anschlagvorrichtung für eine biegepresse
JP5187728B2 (ja) 2007-10-30 2013-04-24 株式会社アマダ 曲げ加工装置
DE102011000549A1 (de) 2011-02-08 2012-08-09 Dorma Gmbh + Co. Kg Schloss mit einer Falle und einer Zusatzfalle zur Ablaufsicherung einer Riegelbewegung
AT511107B1 (de) * 2011-05-09 2012-09-15 Trumpf Maschinen Austria Gmbh Biegepresse mit anschlagvorrichtung und verfahren zum betrieb einer biegepresse mit anschlagvorrichtung
AT511451B1 (de) * 2011-10-25 2012-12-15 Trumpf Maschinen Austria Gmbh Werkzeugmaschine mit einer anschlagvorrichtung und verfahren zum betrieb der werkzeugmaschine
FR3011026B1 (fr) 2013-09-24 2016-04-15 A Raymond Et Cie Dispositif de fixation d'un objet plat sur une plaque support et assemblage obtenu
JP6397729B2 (ja) 2014-03-07 2018-09-26 株式会社アマダホールディングス バックゲージ装置及びバックゲージ装置の位置決め方法並びにプレスブレーキ

Also Published As

Publication number Publication date
CN109843461B (zh) 2022-01-11
US11267030B2 (en) 2022-03-08
EP3525950B1 (fr) 2021-12-01
US20190217358A1 (en) 2019-07-18
AT519203A1 (de) 2018-04-15
CN109843461A (zh) 2019-06-04
AT519203B1 (de) 2018-10-15
WO2018068074A1 (fr) 2018-04-19
JP7032393B2 (ja) 2022-03-08
JP2019534790A (ja) 2019-12-05

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