EP1741497B1 - Procédé et dispositif pour produire sans enlèvement de matière une encoche dans une pièce et pièce avec une telle encoche - Google Patents

Procédé et dispositif pour produire sans enlèvement de matière une encoche dans une pièce et pièce avec une telle encoche Download PDF

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Publication number
EP1741497B1
EP1741497B1 EP06012029A EP06012029A EP1741497B1 EP 1741497 B1 EP1741497 B1 EP 1741497B1 EP 06012029 A EP06012029 A EP 06012029A EP 06012029 A EP06012029 A EP 06012029A EP 1741497 B1 EP1741497 B1 EP 1741497B1
Authority
EP
European Patent Office
Prior art keywords
notch
workpiece
work piece
wall
tool
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.)
Not-in-force
Application number
EP06012029A
Other languages
German (de)
English (en)
Other versions
EP1741497B9 (fr
EP1741497A2 (fr
EP1741497A3 (fr
Inventor
Franco Arcidiacone
Ulrich Huperz
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.)
Thiel and Hoche GmbH and Co KG
Original Assignee
Pampus Automotive & Co KG GmbH
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 Pampus Automotive & Co KG GmbH filed Critical Pampus Automotive & Co KG GmbH
Priority to SI200630699T priority Critical patent/SI1741497T1/sl
Priority to PL06012029T priority patent/PL1741497T3/pl
Publication of EP1741497A2 publication Critical patent/EP1741497A2/fr
Publication of EP1741497A3 publication Critical patent/EP1741497A3/fr
Application granted granted Critical
Publication of EP1741497B1 publication Critical patent/EP1741497B1/fr
Publication of EP1741497B9 publication Critical patent/EP1741497B9/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • B21D17/025—Forming single grooves in sheet metal or tubular or hollow articles by pressing by pressing tubes axially

Definitions

  • the invention relates to a workpiece having a top side and a bottom side and with a non-machined notch, the side surfaces and a notch base, wherein the notch extends at least from the top to the bottom of the workpiece and a method for producing a notch in a workpiece made of metal.
  • the workpiece according to the invention has an upper side and a lower side, as well as a non-machined notch.
  • This notch has side faces and one Kerbground on; the notch extends from the top to the bottom of the tool and penetrates the entire thickness of the workpiece.
  • the depth of the notch can be greater than the thickness of the workpiece itself, ie the distance between the top and bottom of the workpiece.
  • the depth of the notch may be at least 10%, preferably at least 20%, preferably at least 40%, more preferably at least 50% more than the thickness of the workpiece.
  • the depth of the notch exceeding the thickness of the wall piece is referred to as a notch wall, which consequently adjoins the side surfaces and includes the notch base.
  • the workpiece can be provided with notches whose cross-section is approximately U-shaped with respect to the upper side of the workpiece, ie in which the side surfaces are approximately at a right angle with respect to the upper side of the workpiece. Consequently, these are notches with a substantially flat, preferably flat notch base.
  • the side surfaces of the notch may be located at an angle ⁇ greater than 70 °, preferably greater than 80 °, more preferably greater than 85 °, with respect to the top of the workpiece prior to notching. It is thus possible according to the invention to arrange the notch in a workpiece according to the invention with side faces arranged at least in sections approximately at right angles to the upper side. Preferably, the approximately rectangular portions of the side surfaces extend to the top of the workpiece.
  • Notches of approximately U-shaped cross section are often required in the design of a workpiece when they are part of Verriegelungsanordrungen. It is obvious that the safety aspect plays a special role in locking arrangements, so that the notch geometry must be reliably maintained. Typical use case for such notches is the requirement of pipes of Headrests with deep, U-shaped notches to provide. Latches attached to the car seat engage in these notches so that the tight fit of the headrests is ensured.
  • the above-described notches can be introduced into any type of workpiece, that is also in tubular workpieces.
  • a workpiece is provided according to the invention, which is provided with a notch whose angle of incidence ⁇ is up to 10 °.
  • the angle of incidence ⁇ is measured between the top of the workpiece before the notch (horizontal) and the top of the workpiece after notching.
  • the incidence angle resulting from the notches is up to 5 °, more preferably up to 3 °, advantageously up to 1 °.
  • a low angle of incidence often has to be met if the side surfaces of the notch are arranged approximately perpendicular to the top of the workpiece. By maintaining a low angle of incidence, the portion of the side surface approximately perpendicular to the top of the workpiece is maximized.
  • the notch wall in the region in which the notch extends beyond the underside of the workpiece, in the region of the notch base, ie on the notch facing side of the notch wall, a different contour than the underside of the notch wall is created in this case with a tool that is composed of punch and die.
  • the cross section of the notch on the "inside" is determined by the contour of the punch.
  • the punch is molded according to the notch geometry requirements, such as the length and orientation requirements of the side surfaces, the contour of the notch root, or the angle of incidence.
  • the die on the other hand, is generally not subject to such stringent mold requirements. It can be inventively formed freely depending on the material of the workpiece. It is inventively advantageous if the formed by the die bottom of the notch wall another Contour than the formed by the punch inside of the notch wall.
  • the notch wall and possibly also the notch base in the area in which the notch extends beyond the underside of the workpiece has sections of different wall thickness.
  • the wall thickness of the notch wall increases towards the side surfaces.
  • a small wall thickness of the notch wall in the region between the side surfaces or at a distance from the side surfaces can be readily accepted for most embodiments.
  • a tool for embossing a notch has a punch that penetrates into the workpiece and there forms the contour of the notch in the workpiece and a die, which coins the underside of the notch or of the notch base, characterized in that the punch the workpiece against the die suppressed.
  • the die has a land in the area of the notch bottom.
  • the die has a recess in the region of the transition from the notch root to at least one side face of the notch.
  • the formation of the die with web and recess is essential for the formation of particular deep U-shaped notches in workpieces. Notches extending across the entire thickness of the workpiece require shifting material of the workpiece beyond the bottom of the workpiece. The greater the angle ⁇ between the top and side surface of the notch, the sooner a non-cutting deformation of the workpiece causes a shearing or cutting of the material. It has surprisingly been found that this shearing or cutting can be counteracted very effectively if the recess in the die can accommodate sufficient material of the workpiece, which is displaced by the penetrating Stegpel. This material preferably flows into the recess and is then available for forming the notch base
  • a web in the die.
  • the web is advantageously located in the middle of the notch base evenly spaced from the side surfaces.
  • the bridge ensures that the notch base can be shaped in a controlled manner by the punch chin.
  • the die is formed so that the recess in the region of the side surfaces of the notch extends beyond the web.
  • the recess which is preferably arranged in the transition region between the notch root and side surfaces of the notch, thus extends according to this preferred embodiment not only beyond the depth of the notch or the notch root defined by the web.
  • the die in this case is thus designed in cross-section approximately like a "W", in which the recess extends beyond the upper edge of the web out into the region of the side surfaces of the notch.
  • the notch extends beyond the thickness of the workpiece, it creates space in the region of the side surfaces for the flow of the material of the workpiece.
  • such a template is particularly suitable for producing deep, U-shaped notches.
  • the depth of the recess has at least the thickness of the notch wall, shearing or cutting of the material of the workpiece will occur effectively avoided when forming the notch.
  • the recess is provided with a rounded contour, this also helps to support the flow of the material of the workpiece. Above all, a rounding .. in the transition from the side surfaces in the recess and in the transition from the web into the recess into it proven rounded transitions in the contour of the recess.
  • An advantageous embodiment of the tool provides that the punch and die cooperate in such a way that the notch base is arranged on or under the underside of the workpiece. In this way, particularly deep notches can be marked.
  • punch and die are designed so that they are arranged at a predetermined pressure for introducing the stamp at a predetermined distance from each other and thereby dictate the wall thickness of the notch wall.
  • the punch and die may have different contours, so that the distance between the punch and die sections is further or less.
  • a two-part die is preferably used.
  • a two-part die allows easy insertion and removal of the die inside the tube.
  • the inventive advantage of the method according to claim 7 is particularly evident in the notching of pipes. Deep notches and notches of approximately U-shaped cross section are limited or expensive to produce with the previously known methods. This is because, as a rule, not enough material for the notch wall is available for such deep notches in pipes. The notch bottom is a weak point in the notches, which are deeper than the pipe wall. Particularly noticeable is this vulnerability z. B. when crash tests for vehicles, the headrest, which is held in such a notch, breaks off upon impact, because the tube in the notch base or in the notch wall has too little material to withstand the impact.
  • displaced material is displaced in the direction of the notch base or the notch wall to be created. It is therefore promoted material exactly where it is necessary for reasons of strength and to create notches with extremely large notch depth.
  • the method according to the invention is applied in such a way that the sections in the workpiece which are deformed by the first and the second tool overlap. This achieves as uniform a deformation as possible from the outset.
  • Such an overlap of the paths of the tools is not absolutely necessary because - as will be explained below - also still other possibilities of chipless deformation in the inventive method can be included.
  • Rollers or slides are preferably used according to the invention as tools.
  • Roller tools and slides are known for non-cutting making notches per se. But they are always used in one direction and usually in a sequence of several tools in succession to produce a notch desired contour. In the context of the present invention, it is preferred to use as few tools as possible. Nevertheless, of course, especially if a lot of material is to be deformed or if a complex contour is to be created, different tools can be used, including tools that work in the same direction, but have a different contour.
  • an angle of incidence ⁇ of less than 5 °, preferably of less than 3 °, particularly preferably of less than 1 °, can be maintained without problems, because when the tool is being rolled, the material is not drawn into the material Notch into it, as z. B. is typical for embossing.
  • first and second tools deform one or more first and second tools the workpiece in several operations.
  • a stationary arranged workpiece is processed.
  • the first and second tools are movable, e.g. B. on rails or mounted on a carriage and move relative to the workpiece. They do not deform the workpiece in one operation but in several steps, for example, first a flat notch is made, which is then deepened in further operations until it has reached its final contour. In this way, notches with complex and / or precise contours can be made and notches can be made in which large amounts of material to be deformed.
  • the workpiece to be scored is further deformed by stamping after being deformed by the first and second tools to produce the notch.
  • the embossing proves itself as a second processing step, in particular for producing the final notch depth, as advantageous.
  • the radial force application in a third working direction of the embossing stamp causes the molding of the notch base with little effort.
  • Fig. 1 shows a sectional view of the workpiece 1 together with the tool assembly consisting of punch 2 and die 3. To simplify the illustration only a partial section of the workpiece 1 has been shown. Also, the punch 2 is only partially shown at the top, not shown end of the punch 2 is a suitable device for exercising a matched to the material of the workpiece 1 pressure arranged, such as, for example, a pneumatically actuated plunger.
  • the punch 2 and the die 3 are made of hardened steel.
  • the die 3 has a web 4 in its longitudinal extension, laterally two recesses 5a, 5b are arranged.
  • the web 4 serves as a stop to specify a controlled notch depth for the later notching process.
  • the recesses 5a, 5b extend in the direction of movement of the punch 2 beyond the web 4 and have a round contour line, so that a cutting action during the notching process is avoided ,
  • a force of approximately 60 kN is exerted on the workpiece 1 by punch 2 and die 3.
  • the punch 2 displaces the material of the workpiece 1 in the direction of the die 2, as in FIG Fig. 2 shown.
  • the material of the workpiece 1 flows through the pressure exerted in the recesses 5a, 5b of the die 3, which are designed so that they can completely absorb the flowing material.
  • the projecting web 4 and the pressing pressure of the punch 1 determine the notch depth.
  • a layer of shifted material of defined thickness which forms a notch base 6, forms between the punch 1 and the web 4, as in FIG Fig. 3 shown.
  • the two recesses 5a and 5b are now completely filled by displaced material.
  • the design of the recesses 5a, 5b must be chosen so that they are sufficient to receive the displaced material of the workpiece 1. However, depending on the application and the desired geometry of the notch, the recesses 5a, 5b can also be larger.
  • a notched according to the method described above workpiece shows Fig. 4 , The figure clearly shows that the notch base 6 lies outside the original underside of the workpiece 1.
  • the method allows extremely deep notches with the advantageous use of thin-walled workpieces, such as. Tubes.
  • the shaping the recesses 5a, 5b of the die 3 produced at the notch walls sections of different wall thickness. Particularly in the areas of the transition from the region of the notch base 6 to the side walls, a thicker wall thickness with respect to the mechanical stability of the notch is advantageous.
  • the recesses 5a and 5b of the die 3 can be adapted to the desired geometry of the notch.
  • Fig. 5 shows the definition of the angle of incidence ⁇ and the angle a in an enlarged partial view of the surface of the workpiece Fig. 4 ,
  • the angle of incidence is measured between the original surface of the workpiece and the notch of the surface of the workpiece at the notch.
  • the angle a is measured between side wall of the notch and original surface.
  • Fig. 6 shows a perspective view of a notched pipe section 7.
  • the pipe section 7 has a wall thickness W.
  • the notch is made by a per se known rolling tool in a first working direction A tangential to the pipe section 7 to the apex of the pipe section, but not over the entire Length of the notch was guided. Subsequently, a second rolling tool in a second working direction B opposite to the working direction A, so also tangent to the pipe section 7 to over the vertex of the pipe section, but not over the entire length of the notch out.
  • the rolling tools known per se are not shown here for reasons of clarity.
  • the first and second rolling tools are alternately guided five times in the pipe section.
  • the notch depth is then the same depth as the wall thickness.
  • the material from the pipe wall has been largely shifted to the notch bottom.
  • the embossing die (not shown), which now radially deforms from the third working direction C, increases the notch depth T to the full extent, which is more than 50% above the wall thickness W.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Turning (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Forging (AREA)
  • Punching Or Piercing (AREA)
  • Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)

Claims (8)

  1. Pièce à travailler avec un côté supérieur et un côté inférieur et avec une rainure fabriquée sans enlèvement de copeaux qui présente des faces latérales et un fond de rainure (6), la rainure s'étendant au moins du côté supérieur au côté inférieur de la pièce à travailler (1), caractérisée en ce que la rainure présente, dans la zone qui s'étend en sortant au delà du côté inférieur de la pièce à travailler (1), une paroi de rainure pour laquelle les contours du fond de la rainure (6) et le côté inférieur de la paroi de la rainure qui est formé par une matrice (3) sont configurés différents.
  2. Pièce à travailler selon la revendication 1, caractérisée en ce que la profondeur de la rainure est plus profonde d'au moins 10%, de préférence d'au moins 20%, de manière préférée d'au moins 40%, de manière particulièrement préférée plus profonde d'au moins 50% que l'épaisseur de la pièce à travailler (1).
  3. Pièce à travailler selon la revendication 1 ou 2, caractérisée en ce qu'au moins une face latérale de la rainure est placée, par rapport au côté supérieur de la pièce à travailler (1), dans un angle a de plus de 70°, de manière préférée de plus de 80°, de manière particulièrement préférée de plus de 85°.
  4. Pièce à travailler selon au moins l'une des revendications précédentes, caractérisée en ce que l'angle d'incidence 13 est d'au plus 10°, de préférence d'au plus 5°, de manière particulièrement préférée d'au plus 3°, de manière avantageuse d'au plus 1°.
  5. Pièce à travailler selon au moins l'une des revendications précédentes, caractérisée en ce que la paroi de la rainure présente des sections de différentes épaisseurs de paroi.
  6. Pièce à travailler selon au moins l'une des revendications précédentes, caractérisée en ce que l'épaisseur de paroi de la paroi de la rainure monte du fond de la rainure (6) vers les surfaces latérales.
  7. Procédé pour la fabrication d'une rainure dans une pièce à travailler (1) en métal avec les étapes :
    - déformation de la pièce à travailler (1) par au moins un premier outil qui se déplace dans un premier sens de travail tangentiellement à ou dans le plan de la pièce à travailler (1) section par section en entrant dans la pièce à travailler (1) ;
    - déformation de la pièce à travailler (1) par au moins un second outil qui se déplace dans un second sens de travail tangentiellement à ou dans le plan de la pièce à travailler (1) section par section en entrant dans la pièce à travailler (1), le second sens de travail étant opposé au premier sens de travail,
    caractérisé en ce qu'après la déformation de la pièce à travailler (1) par le premier et le second outil la pièce à travailler (1) continue à être déformée par estampage entre un poinçon d'estampage (2) et une matrice (3) qui coopère avec le poinçon d'estampage (2) pour réaliser la rainure.
  8. Procédé selon la revendication 7, caractérisé en ce que comme premier et/ou comme second outil un coulisseau ou un galet déforme le métal.
EP06012029A 2005-06-14 2006-06-12 Procédé et dispositif pour produire sans enlèvement de matière une encoche dans une pièce et pièce avec une telle encoche Not-in-force EP1741497B9 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200630699T SI1741497T1 (sl) 2005-06-14 2006-06-12 Postopek in orodje za izdelavo obdelovanca z Ĺľlebom brez odrezovanja in obdelovanec z Ĺľlebom
PL06012029T PL1741497T3 (pl) 2005-06-14 2006-06-12 Sposób i narzędzie do bezwiórowego wytwarzania przedmiotów obrabianych z karbem i przedmiot obrabiany z karbem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005027584A DE102005027584A1 (de) 2005-06-14 2005-06-14 Werkstück mit einer nicht-spanend erzeugten Kerbe

Publications (4)

Publication Number Publication Date
EP1741497A2 EP1741497A2 (fr) 2007-01-10
EP1741497A3 EP1741497A3 (fr) 2007-02-28
EP1741497B1 true EP1741497B1 (fr) 2010-03-31
EP1741497B9 EP1741497B9 (fr) 2010-09-01

Family

ID=37021062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06012029A Not-in-force EP1741497B9 (fr) 2005-06-14 2006-06-12 Procédé et dispositif pour produire sans enlèvement de matière une encoche dans une pièce et pièce avec une telle encoche

Country Status (6)

Country Link
EP (1) EP1741497B9 (fr)
AT (1) ATE462508T1 (fr)
DE (2) DE102005027584A1 (fr)
ES (1) ES2343814T3 (fr)
PL (1) PL1741497T3 (fr)
SI (1) SI1741497T1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008047531C5 (de) * 2008-09-16 2013-08-01 Grammer Aktiengesellschaft Halterohr für Ausstattungseinrichtungen von Fahrzeuginnenräumen sowie Verfahren und Vorrichtung zum Erzeugen einer Aussparung in einem Halterohr
DE102010064068A1 (de) * 2010-12-23 2012-06-28 Volkswagen Ag Tragelement, insbesondere Tragstange für eine Kopfstütze mit Kopfstützen-Rastkerben mit verringerter Kerbwirkung
DE102021113473A1 (de) * 2021-05-25 2022-12-01 Erni International Ag Prägegesenk für ein Stanzwerkzeug

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04143021A (ja) * 1990-10-03 1992-05-18 Masanobu Nakamura 管材表面の凹部成形方法
FR2816857B1 (fr) * 2000-11-20 2003-02-28 Faurecia Sieges Automobile Procede et dispositif de crantage d'un tube d'armature pour un siege de vehicule automobile, notamment un tube d'armature d'appuie-tete
FR2842752B1 (fr) * 2002-07-29 2005-02-11 Macsoft Presse pour le crantage d'un tube comportant en combinaison un mandrin introduit a l'interieur du tube et une piece conformee selon le cran a realiser.
US7424817B2 (en) * 2003-07-25 2008-09-16 Inoac Corporation Method of working recessed portion in headrest stay and press apparatus for working recessed portion in headrest stay

Also Published As

Publication number Publication date
DE502006006553D1 (de) 2010-05-12
SI1741497T1 (sl) 2010-08-31
DE102005027584A1 (de) 2006-12-28
EP1741497B9 (fr) 2010-09-01
EP1741497A2 (fr) 2007-01-10
ATE462508T1 (de) 2010-04-15
EP1741497A3 (fr) 2007-02-28
ES2343814T3 (es) 2010-08-10
PL1741497T3 (pl) 2010-10-29

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