EP3846951B1 - Werkzeugbügel und vorrichtung zum kaltfügen - Google Patents

Werkzeugbügel und vorrichtung zum kaltfügen Download PDF

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Publication number
EP3846951B1
EP3846951B1 EP19748775.4A EP19748775A EP3846951B1 EP 3846951 B1 EP3846951 B1 EP 3846951B1 EP 19748775 A EP19748775 A EP 19748775A EP 3846951 B1 EP3846951 B1 EP 3846951B1
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EP
European Patent Office
Prior art keywords
section
tool
tool frame
outer edge
sections
Prior art date
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EP19748775.4A
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German (de)
English (en)
French (fr)
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EP3846951A1 (de
Inventor
Michael Badent
Florian Schneider
Sascha SOMMER
Frederik Freudling
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.)
Tox Pressotechnik GmbH and Co KG
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Tox Pressotechnik GmbH and Co KG
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Publication of EP3846951A1 publication Critical patent/EP3846951A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/30—Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/025—Setting self-piercing rivets
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding

Definitions

  • Devices or tools for cold forming or punching workpiece sections in particular made of a steel material, such as tools for riveting or full or semi-hollow punch riveting, clinching or clinching, pressing in or embossing, must meet different requirements.
  • Such tools regularly have pliers or a tool hanger or a so-called C-frame or C-bracket, which carries the corresponding tool elements that come into effect on the workpiece.
  • the design of the tools or the tool hangers must be based on the work processes to be managed with the tools, whereby the processes are precisely defined and short cycle times with high process reliability are desired.
  • the tools should in particular have low weights with the highest load capacity and should also be economically advantageous to produce. To achieve these goals, complex relationships must be taken into account in order to provide modern tools.
  • tool hangers are often used on industrial robots as mobile tools.
  • the object of the present invention is to provide a device or a tool of the type mentioned at the outset, whereby the device meets different requirement profiles and can be used variably and reliably.
  • the invention is based on a tool bracket for a device for cold joining, in particular for a cold joining tool, the tool bracket having two leg sections spaced apart from one another and a connecting section, a stamp unit of the device being able to be provided at a free end of a first leg section and at a free end At the end of a second leg section, a die unit of the device can be provided, so that when provided, the stamp unit and the die unit lie opposite one another and define a tool axis, and ends of the leg sections facing away from the free ends are connected to one another via the connecting section, the tool bracket having a first surface side and has a second surface side opposite the first surface side, an outer contour of the tool hanger being determined by an outer edge of the tool hanger in the transition between the two surface sides.
  • the workpiece that can be processed with the device can be positioned between the stamp unit and the opposite die unit.
  • a drive unit can be coupled to the stamp unit in such a way that a stamp of the stamp unit can be moved in a driven manner along a joining axis of the device.
  • the joining axis is defined by the device, which in particular generally coincides with a central longitudinal axis of the stamp.
  • the drive unit for The stamp is in particular an electric drive or a hydraulic or pneumatic or hydropneumatic drive with a linearly driven movable drive plunger which can be coupled to the stamp. It is also conceivable that the drive unit can be coupled to the die unit and that the die can be moved in a driven manner along the joining axis of the device. It is also conceivable that the drive unit can be coupled to the stamp unit and to the die unit, and that the stamp and the die can be moved in a driven manner along the joining axis of the device.
  • the device has a preferably programmable higher-level control unit for operational control of the device.
  • the control unit includes a computer or computer unit including software and communicates with different components such as sensor, measuring, actuating and/or drive units of the stamp and die unit.
  • the tool hanger comprises a reinforcing section which is present on the outer edge along the outer contour of the tool hanger, whereby, viewed over a course of the reinforcing section along the outer edge, there are several subsections of the reinforcing section, each with an associated thickness dimension of the subsection, wherein an extent of the respective sections along the outer edge and parallel to one side of the surface is at least 30 millimeters. Preferably, at least two sections with different thickness dimensions are provided.
  • the reinforcing section has an increased thickness or a greater material thickness or an accumulation of material compared to a generally uniform minimum thickness of the remaining areas of the tool hanger, which are in particular plate-shaped or part of a common plate.
  • the reinforcing section forms, for example, an at least almost closed loop along the outer edge.
  • a maximum permissible inclination or a maximum permissible radial offset of the tools on the tool hanger is maintained or undercut in a practical manner as a result of the tool hanger being bent open.
  • undesirable transverse forces on the tools can be reduced.
  • maximum permissible tool offsets and angular misalignments are maintained due to a spatial position-dependent deformation of the tool hanger as a result of its own weight and the weight of the tool components mounted on the hanger.
  • the tool hanger according to the invention advantageously absorbs comparatively high pressing forces despite its reduced overall weight.
  • the tool hanger according to the invention also makes it possible to influence the kinematics of the bending of the tool hanger, which cannot be completely avoided in practice, in such a way that the resulting spatial change in position of the tool parts in the case of work or loading occurs in a predominantly coaxial direction Joining or tool axis results. In this direction, deformation can be tolerated to a greater extent, since this can be compensated for with a comparatively less negative, longer working stroke of the working punch.
  • the tool holder is preferably made in one piece, in particular made of a steel material.
  • the tool holder is preferably made of a standard starting material such as. B. made from a flat plate-like material blank, for example made from a material plate or steel plate, for example machined from a steel blank by machining the steel blank.
  • the connecting section and the first and second beam sections are therefore advantageously formed in one piece.
  • the area of the free ends of the first leg section and / or the second leg section is at least approximately trapezoidal or not triangular in plan view of the respective surface side or the free ends are in particular not tapered, but have a free edge that is oblique or parallel runs to the tool axis.
  • the reinforcing section present in the edge area With the reinforcing section present in the edge area according to the invention, a concentration of material or an accumulation of material in selected areas of the tool hanger based on the overall extent of the bracket is advantageously carried out in a comparatively highly effective manner.
  • the additional tool hanger sections present in addition to the reinforcement section either have a comparatively lower use of material, i.e. can be made slimmer or thinner transversely to the surface sides, or other areas of the tool hanger can be saved, i.e. omitted, through material-free areas.
  • the complete tool hanger possibly apart from comparatively small areas such as connection sections for the stamp unit, the die unit, lines and / or a tool hanger holder, such as one end of a robot arm, essentially through the reinforcement section is formed or with only comparatively small areas outside the reinforcing section.
  • the tool hanger is made from sections that are cohesively connected to one another, e.g. B. by welding steel parts.
  • a minimum length of a section of at least 30 millimeters and possibly at least 5% of a total length of the outer edge is to be used as a basis for training that is suitable for practical use in the tool sector.
  • the reinforcement sections are either all immediately adjacent to one another, or two of the several reinforcement sections are interrupted by a non-reinforced area.
  • the plurality of reinforcing sections can either be immediately adjacent to one another or spaced apart by a minimum thickness of the There must be a non-reinforced intermediate section made of tool hanger material.
  • the at least almost entire outer edge can be reinforced in the same way and / or the reinforcing section is designed to be continuous over almost the entire outer contour of the tool holder, in particular to be uniform throughout, as far as the width of the reinforcing section is concerned.
  • the reinforcing section has a step-like thickness and/or width dimension, e.g. B. adapted to different areas of the tool hanger in different areas of the tool holder.
  • the width of the reinforcing section is in a range between 5mm and 150mm.
  • the reinforcing section changes continuously and/or in steps in the direction of and/or along the outer edge at one or more points on the outer edge.
  • the reinforcement section changes in its width dimension.
  • the reinforcing section changes in a direction normal to the surface sides and/or in an extension in a direction away from the edge inwards towards the surface sides.
  • the reinforcing section accordingly has a spatial extent with an extension direction in the direction of a thickness of the tool holder, i.e. transversely and/or normal to the surface sides, and a width extension in the direction of the planes spanned by the surface sides.
  • An outer contour can be understood as a course of an outer line of the floor plan of the tool hanger.
  • the mechanically reinforcing effect of the reinforcing section is based on an increase in the thickness of the material in the edge area, compared to an average thickness of the remaining areas of the surface sides.
  • the area of the reinforcement section on a respective surface side is, for example, based on this surface side, preferably approximately 5% to approximately 10% of the entire surface side, assuming that material-free areas within the outer contour of the tool hanger are also included in the surface side.
  • the areas of the tool holder remaining in relation to the reinforcing section have a consistently or on average a smaller thickness than the reinforcing section.
  • the reinforcing section is designed in coordination with the leg sections and the connecting section in such a way that an elastic deformation behavior of the first leg section and an elastic deformation behavior of the second leg section when the tool bracket is loaded, which corresponds to a load in the cold joining operation of the device, is predetermined.
  • the specification of the elastic deformation behavior of the leg sections is, for example, such that when the leg sections are elastically deformed, an offset between the punch axis and the tool axis and/or an offset of the die axis to the tool axis does not occur or is at least minimized.
  • the deformation can be such that the spatial position of the punch axis and the spatial position of the die axis change in the same amount and/or direction, preferably identically, when the tool holder is loaded during operation.
  • an angular offset between the die and/or punch axis to the tool axis in the loaded state remains preferably less than 5 degrees of angle, preferably less than 2 degrees of angle, in the tool holder according to the invention.
  • the reinforcing section and the leg sections are designed in such a way that an angular and/or radial offset between the punch axis and the die axis, or thus between the punch axis and the tool axis or between the die axis and the tool axis, is minimized or ideally or Depending on the size of the load, this is not relevant in practice.
  • a radial offset when the punch and die axes are aligned parallel to one another remains less than three millimeters, preferably less than one millimeter.
  • the reinforcing section is formed within an edge strip, the edge strip extending from the outer edge to a surface side section, the surface side section being spaced from the outer edge by at least 5 millimeters to a maximum of 150 millimeters.
  • the width at the corresponding points along the outer edge is the same on both sides of the surface, but it can also differ.
  • the reinforcing section preferably extends to the outer edge or forms the outer edge with its outer longitudinal side.
  • the reinforcing section it is possible for the reinforcing section to extend close to the outer edge or to be slightly spaced from it, for example by a few millimeters.
  • the tool bracket In the area of distance the tool bracket then has a thickness that is reduced to the thickness of the reinforcing section, for example a thickness corresponding to the thickness of the remaining surface side.
  • the tool hanger can have a comparatively narrow outer seam, which is thinner than the reinforcement section and whose width is z. B. is of the order of magnitude of the width of the reinforcing section, which is present on the outside of the reinforcing section.
  • the reinforcing section has areas with different but comparatively increased thicknesses, the thickness dimensions being above the average thickness of the remaining surface side.
  • the reinforcing section can be based not only on its length, but also, if necessary, on its width, for example.
  • B. have a first thickness and a second thickness, each of which is formed over, for example, half a width of the reinforcing section. Both thicknesses are e.g. B. between twice and three times larger than the average thickness of the remaining tool hanger.
  • a further advantage results from the fact that a thickness dimension of the reinforcing section of the tool hanger is larger than an average thickness dimension of the remaining part of the tool hanger.
  • the thickness dimension results transversely to planes spanned by the surface sides or by a distance between a first outside of the reinforcement section on one surface side and an opposite second outside of the reinforcement section on the other surface side.
  • the remaining part of the tool hanger preferably has exactly one thickness dimension, i.e. is uniform in its thickness over the entire extent.
  • any individual or few material-free areas or holes in the reinforcing section and the material-free areas in the remaining part of the tool hanger that are present according to the invention are not taken into account for determining the thickness of the reinforcing section or the average thickness, as if they were not present. For individual areas with increased thickness, this is calculated out using the average thickness measurement. Therefore, a few or individual or local locations of the remaining part of the tool hanger according to the invention can have a greater thickness than the thickness dimension of the reinforcing section.
  • the reinforcing section has between two and six sections in the direction of the longitudinal course of the outer edge, each with a different thickness dimension than the adjacent section. The respective thickness dimensions are larger than the average thickness dimension of the remaining part of the tool hanger. It is also conceivable that two or more of the multiple sections that are not adjacent to one another over the length of the reinforcing section have the same increased thickness.
  • spots that are free of material or other spots that are weakened in the material such as e.g. B. individual depressions or holes in the outer edge of the tool holder may be present, which correspond to the entire thickness and / or length of the edge reinforcement are not relevant in practice and are therefore not taken into account when determining the thickness.
  • Such material weakenings are not intentionally intended to save material, but merely serve other purposes or may be present at individual points in the reinforcement section, for example in order to attach additional components such as a cable to the tool hanger.
  • the reinforcing section is formed over at least 80 percent of the length of the outer edge of the tool hanger, preferably over at least 90 percent of the length of the outer edge of the tool hanger.
  • the outer edge which is closed in a loop-like manner, for example, which is based on the longitudinal direction of the outer edge, there can be, for example, an intermediate section which has no greater thickness or, accordingly, for example.
  • the average thickness of the remaining part of the tool hanger is designed, e.g. B. in the form of a short gap or interruption of the reinforcement section.
  • the shape of the course of the reinforcement section viewed over the outer edge length can be varied. This affects both the transitions between the sections with different thicknesses and the shape over the length of a section under consideration itself.
  • the transitions between the sections with different thicknesses can, for example, be continuous or discontinuous or abrupt.
  • the reinforcing section preferably has flat, flat upper or outer sides on both surface sides, as part of the surface sides.
  • the reinforcing section has a thickness that is at least twice as large as the average thickness of the remaining part of the tool hanger.
  • the reinforcing section has a thickness that is 2.5 to 5 times as large as the average thickness of the remaining part of the tool hanger.
  • the reinforcement section has a thickness that is more than approximately 300 percent larger than the average thickness of the remaining part of the tool hanger.
  • the excess thickness is preferably in a range between 100 percent and 500 percent based on the average thickness of the remaining tool hanger, for example approximately 300% based on the average thickness of the remaining tool hanger. This means that factors such as overall stiffness, total weight, mass distribution and/or deformation behavior of the tool bracket are advantageously taken into account.
  • the tool hanger has a total hanger height, which results from the distance between a free end of a leg and a point on the outer edge of the tool hanger in the direction of the longitudinal axis of the leg and perpendicular to the tool axis that can be provided on the tool hanger.
  • the total bracket height is between 25 centimeters and around 50 to 200 centimeters.
  • the reinforcing section relates to an edge region which is further away from the tool axis than a parallel to the tool axis that can be provided on the tool bracket, the parallel defining 20 percent of the bracket height.
  • the reinforcing section is preferably over an at least substantial length along the outer edge on the connecting section of the tool hanger entire outer edge on the connecting section of the tool hanger.
  • a preferred embodiment of the invention is characterized in that the thickness of the reinforcing section is between 30 millimeters and 150 millimeters. This creates a reinforcing section that is advantageous in practice.
  • a cross-sectional area of the reinforcing section is between 500 mm 2 and 7000 mm 2 . This refers to a point under consideration along the outer edge or to a central cross-sectional area.
  • the cross section is to be understood as a cut transverse to the longitudinal extent of the course along or in the direction of the outer edge.
  • a mean cross-sectional area over the entire length or extent of the reinforcing section results from two or more sections of the reinforcing section with different thicknesses, the length proportions of the respective reinforcing sections being taken into account.
  • the first leg section comprises two first beam sections, which are separated from one another by a first weakening section in the first leg section.
  • a material-saving design and weight-optimized design is achieved compared to a tool hanger without a weakening section.
  • a weakening of the material such as B. a material recess or a through hole or material-free window in the surface side brings on the one hand a material and weight saving and on the other hand a reduction in stability.
  • an elastic behavior of the respective material can also be consciously achieved via the size, shape and/or positioning of the material recess on the tool hanger Leg section or its beam sections are influenced or precisely specified. This is advantageous in terms of minimizing the radial offset and angular offset of the punch and die unit that occurs under load for ideal alignment.
  • the weakening section and thus the beam sections are advantageously designed in such a way that the deformation of the beam sections is predetermined.
  • the beam sections are advantageously comparatively much stiffer in their longitudinal direction against tension and pressure than against bending due to side loads.
  • the opposing or facing beam sections of the two leg sections deform under load in such a way that they each deform inwards or towards the weakening section.
  • the two outer beam sections deform to a comparatively smaller or not practical extent. This ensures that an angular deviation of both the axis of the stamp unit and the axis of the die unit relative to the tool or joining axis does not occur or only occurs to a minimal or tolerable extent.
  • the two beam sections of the two leg sections preferably each have a reinforcing section in the edge with an increased thickness.
  • the inner beam section preferably runs at least essentially in a straight line in its longitudinal direction transverse to the tool axis or is dented inwards towards the weakening section or is slightly bent inwards, i.e. looking from the outside onto the narrow side or onto the outer edge of the tool hanger is concave shaped.
  • the outer beam section is transverse to the tool axis in its longitudinal direction is preferably at least essentially rectilinear or comprises several rectilinear sections at an angle to one another or is curved outwards, i.e. is convexly shaped when viewed from the outside onto the narrow side or onto the outer edge of the tool holder.
  • the beam sections are deformed so elastically under load that the stamp or die unit attached to the ends of the beam sections move at least almost parallel or along the tool axis and do not tilt or tilt slightly relative to the tool axis or only to a tolerable extent incline.
  • a weakening section in the tool holder is a material recess or a hole area or a material-free area.
  • a surface of the surface side of the tool holder, which spans between the two first beam sections of the first leg section, is essentially formed by the weakening section.
  • the edge of the weakening section follows the outer contour or the outer edge of the tool hanger or the outer edge in the area of the first two beam sections over its predominant length, which is preferably designed as a reinforcing section.
  • the second leg section comprises two second beam sections, which are separated from one another by a second weakening section in the second leg section. The above applies accordingly to the first weakening area or to the first leg section.
  • the two first and the two second leg sections are coordinated with the two beam sections in such a way that both leg sections deform in an adapted manner, so that the spatial position of the punch axis and the spatial position of the die axis are the same, preferably identical, in amount and / or direction change when the tool bar is loaded during operation.
  • the first and second leg sections preferably have exactly one weakening section.
  • the connecting section preferably has exactly one weakening section.
  • the weakening section in the connecting section is preferably present adjacent to a part of the outer edge of the tool hanger or of the connecting section, the edges of the two inner beam sections of the first and second leg sections being connected to one another via the relevant part of the outer edge.
  • a connection point can protrude into the weakening section, which serves to attach the tool hanger to a movement unit or to a console for connection to a robot arm for moving the tool hanger in use, for example with screw holes for screwing the tool hanger to the robot arm.
  • the tool holder preferably has three weakening sections which are of the same order of magnitude relative to one another in terms of the area of the weakening sections.
  • the weakening sections are approximately triangular in plan shape, preferably with rounded corner areas.
  • the invention also extends to a device for cold joining, in particular to a cold joining tool, the device having a tool holder according to one of the above-described embodiments, with a stamp unit of the device at a free end of a first leg section and a stamp unit of the device at a free end of a second leg section a matrix unit of the device is present.
  • the stamp and the die unit are preferably detachable but can be firmly attached to the tool holder or exchanged.
  • the cold joining device is preferably designed as a robot-guided tool, for example a tool for riveting or full-piercing or semi-hollow punch riveting, for clinching or clinching, for pressing in or for embossing.
  • a drive unit that can be assigned to the stamp unit and/or the die unit is provided, the drive unit comprising a hydropneumatic drive with pressure transmission and/or an electric drive.
  • the work of the cold joining device takes place with the drive unit, which causes a relative movement between a punch of the punch unit and the die unit.
  • the forces and moments that occur are absorbed by the tool holder.
  • undesirable elastic deformations of the tool hanger under useful load can advantageously be minimized. This is necessary for the success of the cold joining process.
  • rivet connections, clinch connections or other cold joining processes can be carried out advantageously.
  • a tool hanger 1 according to the invention for a cold joining tool according to Figures 1 to 4 is preferably made in one piece and, for example, from a plate material blank, preferably machined from a steel material, for example.
  • the tool hanger 1 comprises two leg sections 2 and 3 spaced apart from one another and a connecting section 4.
  • a free end 5 of the first leg section 2 is for releasably but firmly holding a stamp unit 6 (see. Fig. 5 ) of the associated cold joining tool.
  • a free end 7 of the second leg section 3 is designed to releasably but firmly hold a die unit 8 of the associated cold joining tool.
  • the stamp unit 6 and the die unit 8 lie opposite each other and specify a tool axis W of the associated cold joining tool.
  • An approximately C-shaped or U-shaped outer contour 11 of the tool hanger 1 is determined by an outer edge 12 of the tool hanger 1.
  • the outer contour 11 is formed according to an externally circumferential narrow side of the tool hanger 1 in the transition between two surface sides 9 and 10 of the tool hanger 1.
  • a reinforcing section 13 of the tool holder 1 is formed with a respective thickness D1 or D2.
  • the outer contour 11 and thus the outer edge 12 point based on the top view of the surface side 9 according to Fig. 2 Counterclockwise to the following different positions S1 to S7. It is assumed that the point S3 coincides with the free end 7 and the point S6 with the free end 5.
  • the first leg section 2 is surrounded by the outer edge 12 between the points S5 and S7.
  • the second leg section 3 is surrounded by the outer edge 12 between points S2 and S4.
  • the connecting section 4, viewed counterclockwise along the outer contour 11, is accordingly surrounded by the remaining part of the outer edge 12 between the points S7 and S2 and bounded to the leg sections 2 and 3 by the line AA, which runs through the points S2 and S7.
  • the two leg sections 2 and 3 are spaced apart by the part of the outer edge 12 between the points S4 and S5, this part of the outer edge 12 delimiting an edge section of the connecting section 4.
  • the ends of the leg sections 2 and 3 facing away from the free ends 5 and 7, on the line AA between the points S7 and S5 in the leg section 2 and on the line AA between the points S4 and S2 in the leg section 3, are connected to one another via the connecting section 4 tied together.
  • the connecting section 4 extends to the in Fig. 2 shown virtual line AA or is limited by it.
  • the line AA runs parallel to the tool axis W.
  • the first surface side 9 of the tool hanger 1 is in Fig. 2 shown in plan view, with the second surface side 10 opposite the first surface side 9.
  • the tool hanger 1 includes the reinforcing section 13, which is present on the outer edge 12 along the outer contour 11 of the tool hanger 1. Viewed over a course of the reinforcing section 13 along the outer edge, the reinforcing section 13 has a plurality of here at least two sections, each with one associated thickness across the surface sides 9, 10. In the example of the tool hanger 1 shown, the reinforcing section 13 has two sections 14 and 15. Based on the view according to Fig.
  • the section 14 extends from the point S1 via S2 and S3 to the point S4 with an associated constant or uniform thickness dimension D1 of the section 14.
  • the transition between the two sections 14 and 15 or from the Thickness D1 to thickness D2 is preferably formed with a groove, which is particularly true in Fig. 1 can be seen at point S1.
  • the second section 15 accordingly extends from point S4 via S5, S6 and S7 to point S1 with an associated constant or uniform thickness dimension D2.
  • the thickness D1 is approximately 70% of the thickness D2.
  • the reinforcing section 13 is formed within an edge strip 16 and 17 with respect to the two surface sides 9 and 10, or an inner boundary of the reinforcing section 13 coincides with the inner edge of the edge strips 16, 17.
  • the edge strip 16 forms a loop-shaped, externally circumferential part of the first surface side 9 and the edge strip 17 forms part of the second surface side 10.
  • the two edge strips 16 and 17 lie opposite one another and are, for example, identical in their width B1 and B2.
  • the reinforcing section 13 can alternatively have a different width on the surface side 9 than on the surface side 10.
  • the width of the reinforcing section 13 or the width B1, B2 of the sections 14 and 15 is not constant, but rather this changes over the length of the relevant section 14 or 15 along the outer edge with an unchangeable thickness D1 or .D2.
  • the edge strip 16 or 17 with the reinforcing section 13 extends from the outer edge 12 to a line 18, the line 18 being spaced from the outer edge 12 by at least 5 millimeters to a maximum of 150 millimeters, which is a range of values for a Maximum value of the width B1 or B2.
  • the surface sides 9, 10 are flat and flat, apart from the edge reinforcement section 13 and the free ends 5 and 7.
  • the planes spanned by the surface sides 9 and 10 are preferably aligned parallel to one another.
  • the thickness D1 or D2 of the reinforcing section 13 is greater than an average thickness Dm of the remaining part of the tool bracket 13 (see Fig. 3 ).
  • the reinforcing section 13 is formed over almost the entire length of the outer edge 12 of the tool hanger 1. Only in the area of the free ends 5 and 7 is the outer edge 12 of the tool holder 1 adapted for the detachable attachment of the stamp unit 6 and the die unit 8. Therefore, the outer edge 12 can have a normal thickness over a comparatively short section at the free ends 5 and 7. have a smaller thickness than the thickness D1 or D2 of the reinforcing section 13.
  • the tool hanger 1 has a total hanger height H, which is the distance between the tool axis W that can be provided on the tool hanger 1 and a point P on a center line of the outer edge 12 of the tool hanger 1, the point P being on a center between the two Surface sides 9, 10 lie in the spanned central plane, in which the tool axis W also lies.
  • the reinforcing section 13 is preferably formed on the tool holder 1 at least over the part on the outer edge 12 which is in The height direction of the tool holder 1 from the tool axis W lies beyond a contour line parallel to the tool axis W, the contour line corresponding to a partial height H1, which makes up 20 percent of the total height H (see. Fig. 2 ).
  • the tool hanger 1 has a weakening section 19 in the first leg section 2 and a weakening section 20 in the second leg section 3 and a further weakening section 21 in the connecting section 4.
  • the weakening sections 19-21 which are each designed as a material-free area or as a material recess or opening, enable a material and thus weight saving of the tool hanger 1 with no practical adverse effect with regard to the mechanical stability values of the tool hanger 1 according to the invention in tool use.
  • the reduced stability associated with the weakening sections 19-20 is at least compensated for by the reinforcing section or an additional advantageous property of a predeterminable elastic behavior of the tool bracket or the leg sections is achieved when the tool formed with it is in use.
  • the weakening sections 19 and 20 result in a structure of the two leg sections 2 and 3, each with two beam sections 22, 23 and 24, 25, respectively.
  • the first leg section 2 has two first beam sections 22 and 23 and the second leg section 3 has two second beam sections 24 and 25.
  • the weakening sections 19-21 do not extend into the reinforcing section 13.
  • the weakening sections 19-21 are predominantly at a distance from the reinforcing section 13 on. Only the weakening sections 21 adjoins the reinforcing section 13 between points S4 and S5 over short distances.
  • an attachment point 26 such as a flat flange section 27 is provided, for example for connection to a robot arm.
  • Fig. 5 shows the stamp unit 6 with a stamp element 28 on the tool hanger 1 for use with a cold joining tool, which can be driven reversibly linearly in the direction R1 and R2 with a drive unit 30.
  • a cold joining tool which can be driven reversibly linearly in the direction R1 and R2 with a drive unit 30.
  • Opposite is the die unit 8 with a die element 29.
  • Fig. 5 The elastic deformation behavior of the tool holder 1 equipped with the punch and die unit 6, 8 is indicated in practical tool operation, for example in a riveting or clinch process.
  • the two leg sections 2 and 3 or their respective beam sections 22, 23 and 24, 25 deform in such a way that a bending effect of the tool hanger 1 or the leg sections 2, 3 is not disadvantageous in practice comes into effect.
  • the deformation of the beam sections 22-15 is in Fig. 5 highly schematized or unrealistic to an increased extent or indicated by dashed lines.
  • the beam sections 22-25 bend in such a way that advantageously a tool offset and an inclination or an axial offset is lower than with known tool hangers in tool use.
  • An absolute deformation of the leg sections 2, 3 in the direction of force or along the tool axis W can be comparatively greater in the tool holder 1 according to the invention when the tool is in use than in known arrangements, but this is not critical or can be compensated for by a slightly longer driven movement path of the stamp element 28.
  • the stamp unit 6 and thus the stamp element 28 moves in the tool insert, usually superimposed on the driven movement of the stamp element 28 in the direction R1 or R2, almost linearly or parallel to the tool axis W in the direction of R6 and back again towards R6 or without any practical inclination of the longitudinal axis of the stamp element 28 to the tool axis W.
  • the die unit 8 and thus the die element 29 moves in the direction of R8 and back again against R8, almost linearly or parallel to the tool axis W or without any practical inclination of the longitudinal axis of the die element 29 to the tool axis W.
  • the deformations V22 of the inner beam section 22 and the deformation V24 of the inner beam section 24 are based on the unloaded state according to Fig. 2 bent inwards towards the weakening section 19 or towards the weakening section 20 or concavely.
  • a corresponding deformation or bulging in The outer beam section 23 of the first leg section 2 and the outer beam section 25 of the second leg section 3 have the same direction, i.e. bulging outwards.
  • leg sections deform the other way around with an inwardly bent or inwardly convex bulge of inner narrow sides of leg sections of the known hangers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Insertion Pins And Rivets (AREA)
  • Connection Of Plates (AREA)
  • Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
EP19748775.4A 2018-09-04 2019-07-26 Werkzeugbügel und vorrichtung zum kaltfügen Active EP3846951B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018121518.5A DE102018121518A1 (de) 2018-09-04 2018-09-04 Werkzeugbügel und Vorrichtung zum Kaltfügen
PCT/EP2019/070149 WO2020048680A1 (de) 2018-09-04 2019-07-26 Werkzeugbügel und vorrichtung zum kaltfügen

Publications (2)

Publication Number Publication Date
EP3846951A1 EP3846951A1 (de) 2021-07-14
EP3846951B1 true EP3846951B1 (de) 2024-02-28

Family

ID=67514612

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EP19748775.4A Active EP3846951B1 (de) 2018-09-04 2019-07-26 Werkzeugbügel und vorrichtung zum kaltfügen

Country Status (5)

Country Link
US (1) US11571736B2 (zh)
EP (1) EP3846951B1 (zh)
CN (1) CN112839752B (zh)
DE (1) DE102018121518A1 (zh)
WO (1) WO2020048680A1 (zh)

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Also Published As

Publication number Publication date
US11571736B2 (en) 2023-02-07
WO2020048680A1 (de) 2020-03-12
US20210220902A1 (en) 2021-07-22
CN112839752A (zh) 2021-05-25
EP3846951A1 (de) 2021-07-14
DE102018121518A1 (de) 2020-03-05
CN112839752B (zh) 2023-09-19

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