EP3907016A1 - Ensemble d'outils pourvu de composants d'outil permettant de configurer des outils de cintrage - Google Patents

Ensemble d'outils pourvu de composants d'outil permettant de configurer des outils de cintrage Download PDF

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Publication number
EP3907016A1
EP3907016A1 EP21169811.3A EP21169811A EP3907016A1 EP 3907016 A1 EP3907016 A1 EP 3907016A1 EP 21169811 A EP21169811 A EP 21169811A EP 3907016 A1 EP3907016 A1 EP 3907016A1
Authority
EP
European Patent Office
Prior art keywords
tool
insert
bending
section
carrier
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
EP21169811.3A
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German (de)
English (en)
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EP3907016B1 (fr
Inventor
Michael Eissler
Timo Laab
Rainer SCHÖNFELD
Franz Hacker
John Griffin
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Wafios AG
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Wafios AG
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Publication of EP3907016A1 publication Critical patent/EP3907016A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/04—Movable or exchangeable mountings for tools
    • B21D37/06—Pivotally-arranged tools, e.g. disengageable
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/008—Bending wire other than coiling; Straightening wire in 3D with means to rotate the wire about its axis

Definitions

  • the invention relates to a tool set with a large number of tool components for configuring two-part bending tools of different working geometry for use in a bending head of a bending machine and a two-part bending tool that can be configured using tool components of the tool set.
  • Bending machines are computer-numerically controlled, multi-axis machine tools which, with the help of suitable tools, can produce smaller or larger series of molded parts from elongated semi-finished products, in particular wire or tube, with partially complex geometry, predominantly by forming, in an automatic production process.
  • a bending machine of the type considered in this application is equipped with a bending system which has a multi-part bending head which has a first tool carrier and a second tool carrier separate therefrom.
  • the first tool carrier can be rotated about a bending head axis by means of a first drive and has a first tool holder for receiving the first tool part of a two-part bending tool.
  • the second tool carrier can be rotated relative to the first tool carrier around the bending head axis by means of a second drive and has a second tool holder arranged eccentrically to the bending head axis for receiving the second tool part of the bending tool.
  • a suitable two-part bending tool which comprises a first tool part and a second tool part separate therefrom.
  • the first tool part is designed to be fastened in the first tool holder and has two engagement sections on its upper side for engagement with opposite sides of a semi-finished product to be bent.
  • the second tool part is designed to be fastened in the second tool holder and has an engaging section on its upper side for engaging the semifinished product to be bent.
  • the attack sections each have an essentially rotationally symmetrical outer contour. When the two tool parts are inserted in their associated tool holder and fastened there ready for operation, the three attack sections lie in a common plane.
  • the two attack sections of the first tool part can, for example opposite sides are eccentric to the bending head axis, the third engagement section further out at a greater radial distance from this.
  • a bending operation on a wire can take place as follows, for example. First of all, that section of the wire in which a bend is to be produced is brought into the space between the two engagement elements of the first tool part. The clear distance between the attack sections is at least as large as the wire diameter. The first tool part is then rotated until the two engagement sections bear against the wire section on opposite sides without bending it. The wire section is still running straight through the gap in its wire feed direction. To produce a bend, the second workpiece holder is then rotated with respect to the first workpiece holder, which is no longer rotating.
  • the effective radius of the inner engagement section determines the bending radius (radius of curvature) of the generated bend, while the angle of rotation of the second tool part determines the bending angle during the bending operation.
  • the other of the two engagement sections of the first tool part serves as a counter-holder that absorbs the bending forces and prevents the wire from deflecting to the side on the side of the bending mandrel that is remote from the point of application of the bending pin.
  • one of the engagement sections serves as a passive element, the effective radius of which determines the bending radius
  • another engagement section serves as a further passive element that takes on the counter-holder function
  • the third engagement section as an active element that is moved during the bending operation and that brings in the bending forces.
  • Bending machines are usually designed to bend wires or tubes of different diameters from a certain range of diameters (the working area of the bending machine).
  • the cross-sectional shapes can also be different, so that, for example, round cross-sections or polygonal cross-sections can be bent.
  • such bending machines are to be used in the course of time to produce a large number of bent parts with different bending geometries from wires or tubes with different diameters.
  • a change between bending tools with different working geometries is usually necessary, for example, when one Diameter of the semifinished product is to be transferred to a different diameter and / or if the bending radius of the bends to be produced is to be changed.
  • the invention is based on the object of offering the user of a bending machine an inexpensive way of being able to produce a large variety of different bending geometries from wire or tube of different diameters with a bending machine.
  • the invention provides a tool set with the features of claim 1. Furthermore, a two-part bending tool having the features of claim 11 is provided. Advantageous further developments are given in the dependent claims. The wording of all claims is incorporated into the content of the description by reference.
  • the invention provides a tool set with a plurality of tool components for configuring two-part bending tools with different working geometries, which are suitable and intended for use in a multi-part bending head of a bending machine.
  • the bending head has a first tool carrier and a second tool carrier.
  • the first tool carrier can be rotated about a bending head axis by means of a first drive and has a first tool holder for receiving a first tool part of a bending tool.
  • the second tool carrier can be rotated around the bending head axis relative to the first tool carrier by means of a second drive and has a second tool holder arranged eccentrically to the bending head axis for receiving a second tool part of the bending tool.
  • the tool carriers can therefore be rotated coaxially and each hold one of the tool parts of a two-part bending tool.
  • the tool set includes several tool components that can be used to configure two-part bending tools with different working geometries.
  • the tool set comprises at least one first base body which has a fastening section that matches the first receptacle and a base body axis which, when the first base body is fastened in the first receptacle, runs coaxially to the bending head axis.
  • the first base body also has an insert carrier section on which a first insert receptacle for receiving a first tool insert eccentrically to the base body axis and a second insert receptacle, which is offset at an angle to the first insert receptacle, also eccentrically to the base body axis, which is designed to receive a second tool insert.
  • the first base body can be a one-piece tool component, so that the fastening section and the insert carrier section are formed on the same piece of material, for example made of tool steel.
  • a multi-part structure is also possible.
  • the tool set further comprises a second base body which has a fastening section that matches the second receptacle and an insert carrier section on which a third insert receptacle for receiving a third tool insert is formed.
  • the second base body can be made in one piece or in several pieces. He preferably only has exactly one third mission shot.
  • the tool set comprises at least three tool inserts, each of which has a fastening section for fastening the tool insert to one of the insert receptacles and an engaging section with a peripheral surface for engaging a wire or tube to be bent, the peripheral surface having an effective radius in relation to an engaging section axis.
  • the tool set preferably comprises significantly more than three tool inserts in order to be able to configure many differently dimensioned two-part bending tools.
  • the tool set can for example comprise at least ten or at least twenty or at least thirty or at least forty or more tool inserts of different geometries.
  • the tool set can also have two or more first tool inserts with mutually identical geometry and / or contain two or more second tool inserts with mutually identical geometry and / or two or more third tool inserts with mutually identical geometry. Often there are also at least two differently dimensioned first and second base bodies.
  • the base body in each case forms the load-bearing component of a tool part.
  • the first base body In the assembled state of a two-part bending tool, the first base body carries a first and a second tool insert and thus forms the first tool part, while the second base body carries a third tool insert and together with it forms the second tool part of the bending tool.
  • the two eccentric engagement sections of the first tool part are sometimes referred to as “bending mandrels”, while the engagement section of the second tool part is occasionally referred to as “bending pin”.
  • a first tool insert is fastened in the first insert receptacle, which has a first engagement section with a circumferential surface for engaging the wire or tube to be bent, the circumferential surface having an effective first radius having based on a first attack section axis.
  • a second tool insert is fastened, which has a second engagement section with a circumferential surface for engaging the wire or tube to be bent, the circumferential surface having an effective second radius in relation to a second engagement section axis.
  • a third tool insert is fastened in the third insert receptacle, which has a third engagement section with a circumferential surface for engaging the wire or tube to be bent, the circumferential surface having an effective third radius in relation to a third engagement section axis.
  • the bending tool is designed for bending a wire or tube with a diameter DD and the base body (first and second base body) and the tool inserts (first, second and third tool insert) are selected or matched to one another in such a way that a first lighter in the assembled state Distance A1 between the circumferential surfaces of the first and second engagement section corresponds to at least twice the diameter DD, so that A1 2 * DD (first condition) applies.
  • a second clear distance A2 between an outer tangent circle at the first and second engagement section and the circumferential surface of the third engagement section should be greater than the diameter DD.
  • Favorable values can be in the range from 110% to 150% of the diameter DD.
  • the radius R1 of the first engagement section and the radius R2 of the second engagement section should each be at least half of the diameter DD.
  • the first condition (clear distance A1) is met, it can be achieved that the desired diameter of the semifinished product fits between the first and second engagement sections and, at the beginning of the bending engagement, the engagement points of the first and second engagement section on opposite sides of the semifinished product are so far apart that a sufficiently long lever arm is available for the bending operation and the bending force can be applied reliably.
  • the clear distance should not be significantly smaller than the minimum distance, otherwise the force on the attack sections (bending mandrels) can become too high and there is a risk of breakage. In addition, this can reduce marks on the wire or pipe caused by excessive forces.
  • the wire or the pipe may be pinched between a bending mandrel and the bending pin (third contact section) during the bending operation. If, on the other hand, the second clear distance is too large, the force introduced via the bending pin (third application section) may under certain circumstances cause the semifinished product to bend between the actually desired bending point and the point of application of the third application section on the semifinished product, so that the bending geometry becomes imprecise .
  • the third condition (with regard to the radii R1 and R2) takes into account that the diameter also determines the smallest bending radii that can be reliably generated.
  • the radius of a bending mandrel should then be at least half the diameter of the semi-finished product to be bent in order to ensure adequate security against breakage of the bending mandrel (attack section).
  • Compliance with the conditions thus ensures reliable functioning of the bending tool, with the bending part being able to achieve the desired geometry with high precision on the one hand and the components of the bending tool being able to function reliably over the long term and not being damaged on the other.
  • the first insert receptacle and the second insert receptacle on the first base body are each offset at an angle to one another and eccentrically to the base body axis.
  • the first insert receptacle and the second insert receptacle are arranged on diametrically opposite sides of the insert carrier section. This results in a particularly large first clear distance A1, depending on the selected radii R1 and R2, so that great flexibility is created with regard to the processable diameter of the semifinished product.
  • an angular offset of the two insert receptacles of less than 180 ° or more than 180 ° is also possible.
  • the first insert receptacle and the second insert receptacle are preferably designed in the form of receiving recesses open to the radial outside.
  • Such receiving recesses can be easily manufactured, for example, in the form of milled pockets with the aid of milling operations.
  • the lateral attachment allows a simple exchange and a simple fastening with a tight fit of the tool inserts in the insert receptacles.
  • the spacing area for the first clear distance between the eccentric engagement sections on the first base body can easily be determined via the spacing of the receiving recesses.
  • the first insert receptacle and the second insert receptacle are designed to be functionally identical, so that each first or second tool insert can be received in each of the first and second insert receptacles with a tight fit.
  • the insert receptacles can have identical geometry. Due to the functional identity of the insert holders, the flexibility in the selection of the tool components and thus the flexibility in the possible tool geometries is particularly great.
  • first and second tool inserts are incompatible with the third insert holder and that every third tool insert is incompatible with the first and second insert holders. This means that mix-ups are structurally excluded.
  • first and second tool inserts are adapted to the insert carrier section and the first and second insert receptacle in such a way that a radially outer area of the circumferential surface of each engagement section always has the same radial distance from the base body axis, regardless of the effective radius of the engagement section, if a tool insert is fastened in an insert holder.
  • the radially outer regions of the circumferential surface thus each touch a tangent circle lying coaxially to the base body axis.
  • the "flight circle" which the radially outer areas of the engagement sections on the first tool part define is the same for all tool configurations that can be achieved with a specific first base body. In this way, the same geometric relationship to the third engagement section, which is located radially further out, is created in each case.
  • the assembled bending tools are particularly stable when the first and second tool inserts are adapted to the insert carrier and the first and second insert receptacles in such a way that radial outer surfaces of the insert carrier section and the tool inserts used complement one another to form a substantially circular-cylindrical outer surface. In this way it can also be achieved that the bending mandrels sit as far out as possible and the distance A2 and thus the distance between successive bends can be kept as small as possible.
  • the tool set preferably has a plurality of first base bodies.
  • the tool set preferably comprises exactly three differently dimensioned first base bodies.
  • the number of different first base bodies remains manageable for an operator.
  • almost all possible bending geometries can be configured for most bending machines in their work area in fine graduation. So there is a good compromise between manufacturing costs, manageability for an operator and flexibility in the configurable effective geometries.
  • All base bodies preferably have the same (equally dimensioned) receiving recesses, e.g. milled pockets, so that the tool inserts can be used universally on all base bodies.
  • Some embodiments are particularly user-friendly in that a tool configuration help system is provided to assist an operator in selecting tool components for configuring the bending tool, wherein for each diameter of the semifinished product from a predetermined group of different diameters from a working area of the bending machine depending on the desired first radius and second radius exactly one associated first base body from a group with several first base bodies can be identified.
  • This operator help can be implemented in different ways. One possibility is to provide an operator in paper form and / or electronically with a table in which a user is shown the correct first base body to be selected depending on the desired diameter of the semifinished product and the bending radii. It is also possible to integrate the tool configuration help system into the control of the bending machine.
  • the user can then enter the desired combination of bending radii and diameter on the control unit and receive a display that shows him the correct size of the first basic holder.
  • Constellations of diameters of the semi-finished product and bending radii that cannot be selected or should not be selected, for example due to excessive forces or insufficient distances, are clearly marked in the table or another form of representation of the tool configuration help system, for example by a red marking in a table or a warning display on the display unit of the control unit.
  • the invention also relates to a method for setting up a bending head of a bending machine by attaching separate tool parts of a two-part bending tool to a first and a second tool carrier of the bending head.
  • the bending tool is a modular bending tool of the type described in this application.
  • the tool components required for assembling the two-part bending tool can be taken from the tool set.
  • the invention also relates to a method for configuring a two-part bending tool with a first and a second tool part for use on a bending head of a bending machine.
  • Tool components of the bending tool are selected in a suitable combination from tool components of the tool set and the bending tool is assembled with them.
  • FIG. 1 An exemplary embodiment of a wire forming machine in the form of a bending machine 100 for producing two-dimensional or three-dimensional bent parts from wire 190 is shown.
  • the bending machine has a right-angled machine coordinate system MK marked with lowercase letters x, y and z with a vertical z-axis and horizontal x- and y-axes.
  • the x-axis runs parallel to a feed direction in which the material to be bent is fed to a downstream bending device 150 with the aid of a feed device 160.
  • the starting material to be formed (wire 190) is drawn through the bending machine with the aid of a feed device 160.
  • the feed device is used to feed the wire from a supply of material.
  • the feed device can be designed, for example, as a roller feeder or belt feeder.
  • the intake device is guided on guide rails running parallel to the x-direction and can be axially displaced parallel to the x-direction by means of a displacement drive (V-axis). This displaceability can also be omitted in other embodiments.
  • the wire Before the wire 190 enters the intake device, the wire passes a straightening unit which, in the example, has a number of rollers arranged offset.
  • the draw-in device 160 can be rotated about the draw-in axis in both directions of rotation. This makes it easy to switch between bending planes between individual bending operations.
  • a numerically controlled bending device 150 is provided for producing bends on the wire 190 by forming. In the bending area, the wire is bent into the desired shape with the aid of a CNC-controlled bending head 200 of the bending device.
  • a CNC-controlled support table 180 can optionally be provided in order to support longer material sections during bending.
  • the components of the bending device 150 dip perpendicular to the x-direction so that they can again intervene in the wire after changing the bending plane.
  • the Z-axis has an angular offset to the z-direction by approx. 20 °.
  • the intake device 160 and the upstream straightening device are rotated with the aid of a servomotor of a corresponding machine axis (A-axis).
  • a cutting device 170 is mounted, which is provided for the finished bending part (after completion of all bending operations) and possibly one or more twisting operations separated from the supplied material.
  • the submersion movement by means of the Z-axis can also be provided for making the cut.
  • the bending head 200 of the bending device 150 is shown in FIG Fig. 2 particularly easy to recognize.
  • the bending head 200 has two independently rotatable tool carriers.
  • the first tool carrier 210 can be rotated about the bending head axis 202 with the aid of a drive (for example a servo drive), which is not shown.
  • the first tool carrier 210 comprises a rotatable shaft, which is sometimes also referred to as a "mandrel shaft".
  • a first tool holder 215 is designed in such a way that a first tool part 300 of a two-part bending tool 500 can be received therein in a rotationally fixed manner and with a defined axial position and can be fastened there.
  • the second tool carrier 220 is essentially formed by a hollow shaft which can be rotated coaxially with the first tool carrier about the bending head axis 202 with the aid of a second drive (for example servo drive), which is not shown and is sometimes also referred to as a "bending shaft".
  • the tool carriers can be rotated in both directions of rotation about the bending head axis 202 without limitation.
  • On the circumference of the second tool carrier 220 three second tool receptacles 225 are formed, which are arranged at a circumferential distance of 120 ° from one another.
  • Each of the second tool receptacles 225 is designed in such a way that a second tool part 400 of the bending tool 500 can be received therein in an axially and radially defined position and can be fastened there.
  • the second tool receptacles are eccentric to the bending head axis 202 at a radial distance therefrom and allow the second tool part 400 to move around the first tool part 300 on a circular path.
  • the first tool part 300 and the second tool part 400 are each constructed in a modular manner from a plurality of tool components that are designed to match one another and can be fastened to one another in a geometrically defined manner with the aid of fastening screws. Details are given in connection with the Figs. 3 and 4 explained in more detail. It shows Fig. 3 an isometric view of the first and the second tool part without the tool holders provided for receiving them and Fig. 4 a plan view of the two-part bending tool parallel to the bending head axis.
  • the first tool part 300 has a first base body 310 made of tool steel, which has a circular cylindrical fastening section 313 at the lower end and an insert carrier section 315 formed integrally therewith at the upper part.
  • the longitudinal center axis of the cylindrical fastening section 313 defines the base body axis 312, which runs coaxially to the bending head axis 202 when the first tool part is installed.
  • two insert receptacles each for receiving a tool insert are formed on diametrically opposite sides to the base body axis, namely a first insert receptacle 320-1 and diametrically opposite a second insert receptacle 320-2.
  • the insert receptacles are each designed in the form of laterally or radially open milled pockets with a receptacle cross-section delimited essentially at right angles (cf. Fig. 4 ).
  • a first tool insert 330-1 is fastened in the first insert holder 320-1 by means of screws, while a second tool insert 330-2 is fastened in the second insert holder 320-2 by means of fastening screws.
  • the tool inserts each have an outer contour that matches the insert receptacles, so that the tool inserts can be inserted into the insert receptacles essentially free of lateral play and with a defined radial position and can be fastened there with screws.
  • the two tool inserts 330-1, 330-2 of the first tool part 300 are particularly good at Figures 5A, 5B to recognize.
  • Each of the tool inserts is made in one piece from a piece of steel and essentially has a fastening section 312-1, 312-2, on the upper side of which a cylindrical engagement section (first engagement section 315-1, second engagement section 315-2) is formed.
  • the fastening sections each have a contour delimited by three flat surfaces that fit into the insert receptacles without play, as well as a cylindrically curved outer side to be attached radially on the outside, the radius of curvature of which corresponds to the radius of curvature of the upper part of the insert support section of the smallest base support.
  • the upper part of the first tool part has an overall, coaxial, circular-cylindrical outer contour with a radius of R5 that is coaxial with the base body axis (cf. Fig. 4 ).
  • each of the tool inserts there is an upwardly projecting, circular cylindrical extension which serves as an engagement section of the respective tool insert with which the tool insert comes into engagement with the wire to be bent.
  • the attack sections 315-1, 315-2 have different radii (radiuses) R1 and R2. Regardless of the radius of the engagement sections, the engagement sections are seated in such a way that the radially outer areas are at a distance R5 from the base body axis, that is, they are tangent to a common tangent circle, the radius of which corresponds to the radius R5.
  • the second tool part 400 has a second base body 410, the cuboid lower section of which serves as a fastening section 413 in order to be able to fasten the second tool part in a rotationally fixed and axially precisely positioned position in one of the second receptacles 225.
  • an insert carrier section 415 with a larger cross-section, also limited at right angles, in which a laterally open milled pocket is formed, which serves as a third insert receptacle 420-3 in order to be able to accommodate a third tool insert 430-3.
  • Fig. 6 shows a third tool insert 430-3 in the ready-to-use state.
  • This comprises a base body 433 with a bore on the top.
  • a bending pin 415-3 is inserted into the bore by means of a press fit.
  • the base body has an essentially cuboid fastening section which fits exactly into the third insert receptacle 420-3.
  • the bending pin 415-3 which serves as a third engagement section 415-3 of the two-part bending tool and has an effective third radius R3, is inserted at the top.
  • the outer contour of the bending pin is concave in order to ensure a non-slip grip on the wire to be bent. In favorable cases, the concavity corresponds at least approximately to the radius of the semi-finished product to be processed.
  • the third radius R3 corresponds to the radius at the narrowest point. For reasons of stability, it should generally be at least as large as the diameter of the wire.
  • a rotatably mounted roller can also be used as a third engagement section.
  • FIG. 4 shows particularly clearly the geometric relationships on the assembled bending tool.
  • A1 between the mutually facing sides of the bending mandrels (first engagement section 315-1, second engagement section 315-2).
  • the outer areas facing away from one another lie on a common circle with radius R5.
  • the side of the third engagement section (bending pin) 415-3 facing the bending head axis is at a distance A2 from the tangent circle with radius R5, so that in the collinear arrangement shown, the bending mandrel with the bending pin has a minimum distance A2 between the bending pin and the bending mandrel facing it (second Attack section 315-2) remains.
  • a tool set 700 for configuring differently dimensioned two-part bending tools can have numerous first and second tool inserts, each of which has contact sections (bending mandrels) with radii R1 and R2 of different effectiveness.
  • Each of these tool inserts can optionally be used as the first tool insert or the second Tool insert can be used when assembling a first tool part 300.
  • Each of these tool inserts for the first tool part 300 can be inserted into each of the insert receptacles attached to it and fastened there. This means that there are a large number of different combinations of R1 and R2 radii.
  • first tool parts in which the two effective radii R1 and R2 are identical. These can be put together with the help of two first tool inserts of identical geometry, which can be part of a correspondingly equipped tool set.
  • the tool set 700 of the exemplary embodiment has three differently dimensioned base bodies, which are shown schematically in FIG Figures 7A, 7B and 7C are shown.
  • the base bodies each have identically dimensioned cylindrical fastening sections.
  • the insert receptacles 320-1, 320-2 for receiving the first and second tool inserts are dimensioned identically.
  • the diametrical distance A4 between the insides of the insert receptacles 320-1, 320-2 increases from the smallest base body G1 to the largest base body G3, this distance A4 being about three times as large for the middle base body G2 as for the smallest base body G1 and for the largest base body G3 about five times the size of the smallest base body G1. Deviations from these proportions are of course possible.
  • the radii R5 of the cylindrical outer sides are also of different sizes.
  • different second tool carriers are also provided in the tool set 700, in particular in three different sizes. These each have identical fastening sections, but the insert carrier sections are dimensioned differently in such a way that when the third tool insert is inserted, the radial distance to the bending head axis or to the outer tangent circle of the respectively selected base body is different.
  • the distance A5 between the outer diameter of the base body (or the tangent circle of the outer sides of the respective bending mandrels attached to it) and the rear (distant) edge of the respective third insert receptacles 420-3 is identical in each case, so that the same third tool inserts 430- are used in all the base bodies. 3 can be used.
  • the different dimensions of the first and second base bodies and of the tool inserts are adapted to one another in such a way that suitable combinations of selected tool components result in a finely graduated number
  • Different wire diameters from the working area of the bending machine each fit one of the base bodies in order to configure a two-part bending tool in combination with the bending mandrels required for the desired bending radii.
  • a tool configuration help system 800 for this purpose, which makes it easier for an inexperienced operator to select the correct components.
  • Fig. 8 An example of a tool configuration help system 800 is shown schematically in the form of a table. An operator therefore only needs to know the wire diameter DD with which the bent part is to be produced.
  • the table contains numerous possible wire diameters d 1 , d 2 , d 3 etc. from the working area of the bending machine in close increments on its y-axis.
  • the graduation can be selected according to the requirements, for example in steps of 1/10 mm.
  • the operator should know which bending radii are to be generated on the bending part.
  • the radius (radius) of that attack section (bending mandrel) around which the bending takes place defines the bending radius of a bend.
  • a first tool part can thus be prepared for two different bending radii at the same time.
  • the operator is given a size G1, G2 or G3 of the first base body using table 800.
  • the table automatically takes into account the endeavor to keep the distance between the two bending mandrels (first and second contact section) as small as possible by using the smallest possible basic holder in order to be able to achieve the smallest possible distance between two consecutive bends along the wire if necessary.
  • it is also ensured that a minimum distance of permitted combinations of at least twice the wire diameter DD is not undershot, since otherwise the force on the bending mandrel can become too high and there can be a risk of breakage.
  • the wire diameter DD as the input variable also determines the smallest selectable bending radius.
  • the table is designed in such a way that the radius (radius) of the bending mandrel to be bent corresponds to at least half of the wire diameter in order to ensure sufficient security against breakage of the bending mandrel.
  • tool sets with only two differently dimensioned basic holders can be sufficient.
  • three differently dimensioned basic holders according to the experience of the inventors, most of the practically relevant cases can be covered with a suitable graduation of the basic holder sizes.
  • the invention is not limited to the bending of round wire (wire with a round cross section).
  • Modular, two-part bending tools of the type described here can, if necessary with slight modifications, also be used for bending semi-finished products (wire or tube) with other cross-sectional profiles, so that, for example, polygonal cross-sections, such as flat wire, can also be bent.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP21169811.3A 2020-05-08 2021-04-22 Ensemble d'outils pourvu de composants d'outil permettant de configurer des outils de cintrage Active EP3907016B1 (fr)

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DE102020205845.8A DE102020205845A1 (de) 2020-05-08 2020-05-08 Werkzeugset mit Werkzeugkomponenten zum Konfigurieren von Biegewerkzeugen

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EP3907016B1 EP3907016B1 (fr) 2024-03-06

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010080522A2 (fr) * 2008-12-17 2010-07-15 Automated Industrial Machinery, Inc. Dispositifs, systèmes et procédés pour un pliage de fil automatisé
EP2223752A1 (fr) * 2009-02-26 2010-09-01 WAFIOS Aktiengesellschaft Kit de construction des outils destinés à former des outils de cintrage pouvant être couplés sur une unité d'outils d'une machine de cintrage ou de l'enroulement de pièces en forme de tronçons
EP3401036A1 (fr) * 2017-05-05 2018-11-14 WAFIOS Aktiengesellschaft Ensemble d'outils à composants d'outil permettant de configurer des outils de cintrage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2626202C2 (de) 1976-06-11 1992-10-29 Rigobert Dipl.-Ing. 5000 Köln Schwarze Rohrbiegemaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010080522A2 (fr) * 2008-12-17 2010-07-15 Automated Industrial Machinery, Inc. Dispositifs, systèmes et procédés pour un pliage de fil automatisé
EP2223752A1 (fr) * 2009-02-26 2010-09-01 WAFIOS Aktiengesellschaft Kit de construction des outils destinés à former des outils de cintrage pouvant être couplés sur une unité d'outils d'une machine de cintrage ou de l'enroulement de pièces en forme de tronçons
EP3401036A1 (fr) * 2017-05-05 2018-11-14 WAFIOS Aktiengesellschaft Ensemble d'outils à composants d'outil permettant de configurer des outils de cintrage

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DE102020205845A1 (de) 2021-11-11

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