EP1206983A1 - Verfahren und Vorrichtung zum Herstellen von Rastnuten im Rohr einer Armatur für Fahrzeugsitze, insbesondere im Rohr eines Kopfstützenrahmens - Google Patents

Verfahren und Vorrichtung zum Herstellen von Rastnuten im Rohr einer Armatur für Fahrzeugsitze, insbesondere im Rohr eines Kopfstützenrahmens Download PDF

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Publication number
EP1206983A1
EP1206983A1 EP01470020A EP01470020A EP1206983A1 EP 1206983 A1 EP1206983 A1 EP 1206983A1 EP 01470020 A EP01470020 A EP 01470020A EP 01470020 A EP01470020 A EP 01470020A EP 1206983 A1 EP1206983 A1 EP 1206983A1
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EP
European Patent Office
Prior art keywords
tube
face
notch
punch
axis
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
EP01470020A
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English (en)
French (fr)
Other versions
EP1206983B1 (de
Inventor
Richard Joly
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.)
Faurecia Sieges dAutomobile SAS
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Faurecia Sieges dAutomobile SAS
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Publication of EP1206983A1 publication Critical patent/EP1206983A1/de
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/04—Stamping using rigid devices or tools for dimpling

Definitions

  • the present invention relates to a method and a notching device for an armature tube for a seat of a motor vehicle, in particular a reinforcing tube headrest.
  • a classic type of headrest includes a frame formed for example of a curved tube in the shape of an inverted U, each branch of the U constituting a rod which can slide in a guide integral with the seat backrest, to position the headrest according to user wishes.
  • blocking such as a spring latch, engaging with notches of one or two headrest rods.
  • the adjustment notches with a sidewall superior substantially orthogonal to the direction longitudinal of the headrest rod, to constitute a positive stop opposing a sliding towards the low, unless the headrest is unlocked voluntarily.
  • the lower flank of the notch is preferably tilted for easy movement of the headrest upwards, without being blocked by the latch locking.
  • an extreme lower notch can be made with an abrupt lower flank, to form a positive stop opposing involuntary extraction of the headrest out of its guides when it is pulled up, except after unlocking voluntary.
  • notches located towards the front or rear of the head restraint, and these notches can have, depending on the application aiming, several configurations: an upper side steep and an inclined lower flank or a flank steep lower and an inclined upper side, or two steep sides.
  • the object of the present invention is to resolve the problems discussed above and aims to provide a method and a tube notching machine which is simple to implementation and allows to ensure economically making notches at sharp angles on tubes. She particularly aims to be able to produce on tubes, generally of substantially circular section, a notching of which at least one face of the notches has a sharp angle with the outside surface of the tube wall. It aims to be able to achieve these notches without removing material, and without deforming the outer section of the tube, especially not to disturb the sliding of the tube in a guide.
  • the invention is aimed particularly but not exclusively to make notches commonly called anti-sagging notches or anti-sagging notches in a headrest support frame, benefiting from reduced weight possible thanks to the use of a tube to achieve the said frame, and without harming the resistance and reliability of this frame.
  • the object of the invention is a method of notching an armature tube for a seat of a motor vehicle, in particular a reinforcing tube head restraint, a process by which one performs on the tube at least one notch comprising at least one side of locking transverse to the longitudinal direction of the tube and forming a sharp angle with the outer surface of the tube.
  • the steep side of the rod cooperates with the lock to ensure reliable locking of the head restraint and, to this end, the inclination of this steep flank relative to the axis of the headrest rod is about 90 °, ie for example between 80 and 100 °.
  • this flank can even form with the rod generator on which the notch is made at an acute angle, for example up to 70 ° or even less. Such an acute angle, which would difficult to obtain by known methods, may by against being easily carried out by the process according to the invention.
  • the working angle between 15 and 45 °, and preferably between 30 ° and 40 ° means that the tool penetrates into the metal of the tube in a direction sufficiently inclined that it does not there is no tube crushing effect, or at least almost negligible compared to the crash that would happen if punching was done according to a direction perpendicular to the axis of the tube.
  • this metal is forced back inside the tube, but pressure is exerted in one direction relatively close to the axial direction of the tube, the inward pushing effect is relatively less than the metal pushing effect in the axial direction, produced by the leading face of the punch.
  • the leading edge is straight, as far as the attack face and the front face are themselves flat, to form a locking flank and a bottom notch themselves plans.
  • the edge attack consists of a rounded lower radius at 0.8 mm, more preferably still on the order of 0.2 mm. This rounding means that the leading edge does not shear the stamped metal, but tends to push it back under the front face, the roundness sliding somehow on the deformed area as the the tool.
  • the inclination of the rear face in relation to the direction of work is preferably understood between 0 ° and the said working angle and again preferably around 20 °.
  • the value of this angle has two effects. First, it determines the inclination of the flank of the notch opposite to the steep flank, and must therefore respect the constraints resulting from the system locking, so as not to hinder the movement of the headrest in the authorized direction, as has been previously indicated. Second, the inclination of the rear side influences the stamping operation in herself. Indeed, depending on this inclination by relative to the direction of movement of the punch, the face back of the punch tooth has a direct effect more or less accentuated stamping.
  • the angle of inclination is 0 °
  • the rear face of the tooth will simply be guided by sliding against the inclined flank portion formed, without causing specific deformation.
  • the angle of inclination is relatively large, and in especially if it approaches the working angle, the back side will directly participate in the deformation of the metal by pushing back the wall portion of the tube which will form the said inclined flank of the notch, and will on the other hand, by the resulting reactive force, tend to push the punch forward, i.e. in the sense of advance of the punch.
  • the front face of the tool is preferably flat and substantially parallel to the axis of the surface of tightening, to form a notch bottom substantially parallel to the axis of the tube.
  • this face can also, if need, realize this face with a predetermined shape and in particular with a certain inclination by relative to the axis of the tube.
  • the front could be pretty much deleted, or somehow combined with the rear face, to then form a notch triangular profile.
  • the front side of the tooth is small due to relative to the notch length, it may remain after the two previous operations, in an area intermediate between the two notch parts formed, a insufficiently deep-drawn middle area.
  • the invention also relates to a reinforcing tube for a motor vehicle seat, in particular a tube of headrest frame, characterized in that it is provided with sharp angle notching obtained by the process mentioned above, without removal of material, and without deformation of the outer section of the tube
  • the headrest frame 1 shown in FIG. 1 is formed of a steel tube, for example of the E36 type, having a breaking strength of 400 MPa and a 22% elongation, 14 mm in diameter and 2 thick mm.
  • the tube is bent in a U shape with two branches 11 which constitute the holding rods and headrest guidance, sliding and lockable in a manner known per se in guides integral with the backrest of a motor vehicle seat.
  • Each rod has notches 12 which have an upper side steep 13, located substantially in a plane perpendicular to the axis of the rod, a bottom 14, substantially flat and parallel to the axis, and a flank lower 15 slightly inclined relative to said axis.
  • a notch 16 in the same direction but located on the diametrically opposite side of the tube, as well as a lower notch 17, inverted by compared to other notches.
  • the arrangement of the notches in the Figure 1 is given for illustration only and in no way limitative.
  • the notch 12 is produced by pushing the punch 2, for example by means of a hydraulic cylinder, in the direction of arrow F, until the edge 25 formed by the intersection of the attack face 22 and the face frontal 23 has entered the tube from a distance radial equal to the desired depth of the notch.
  • This edge is rounded in shape with radius less than 0.8 mm, preferably equal to 0.2 mm.
  • the edge 25 penetrates in the metal of the tube wall, in the direction of arrow F, the leading face 22 repelling gradually the metal in front of it in to form in end of the steep side 13, while allowing the flow of said metal towards the front face 23, which forms at the end of the race the bottom 14 of the notch.
  • the inclined flank 15 is shaped by the rear face 24 of the tooth.
  • the notch 18 in two steep flanks is formed in two successive operations, the first being illustrated by the dashed line 31 of the tool, inclined relative to the axis of the tube the angle ⁇ 1, to form the first flank 18 'and the second, illustrated by the solid line 32, inclined by relation to a plane orthogonal to the tube so symmetrical, to form the second 18 '' sidewall.
  • a third operation stamping can be carried out by a tool 33 moved perpendicular to the tube.
  • the machine shown in Figure 4 has a frame 40 which includes a punching head 41 and a set of clamping movable vertically relative to the frame 40 and controlled by a clamping cylinder 43.
  • the frame 40 carries fixed clamping jaws 52, such as the jaws shown Figures 9 and 10 which will be described later.
  • Movable clamp assembly carries clamping jaws mobile 51.
  • the punching head comprises a punch 6 axially guided and controlled by a hydraulic cylinder 42. One end of the punch passes through the jaw of clamping 52, in which it is guided in sliding according to work direction F and immobilized in rotation.
  • the clamping jaws shown in Figure 9 in inverted position with respect to the representation of the Figure 4, have a movable jaw 51 and a fixed jaw 52 made in two parts 52a and 52b separated by a plane seal 55.
  • the movable jaw 51 is fixed to the assembly of movable clamping, and the fixed jaw 52 is fixed on the frame 40 of the machine.
  • the jaw 51 has a semi-cylindrical shape in hollow 53, and each part of the fixed jaw 52 has a hollow form 54 in quarter cylinder, so that when the two parts of the jaw 52 are assembled joined at the joint plane 55 and the jaw mobile is brought in front of all of the two parts fixed jaw, the surfaces of the hollow shapes 53 and 54 constitute a cylindrical surface of the same section as tube 1, and able to tightly grip said tube under the action of the clamping cylinder 43, to immobilize it completely during the formation of the notches.
  • the rectangular section of the punch is guided in a hole of corresponding section, constituted by the combination of two grooves 56 made respectively in each part of the fixed jaw 52, the section rectangular avoiding any risk of pivoting of the punch around its axis.
  • the end face 64 is flat, which facilitates the realization of the end active of the punch. We can also realize this face concave to best match the exterior surface of the tube, as already explained.
  • the shapes and dimensions of the end guided punch and tooth can be changed, to adapt them to the dimensions and materials of the tube, without departing from the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)
  • Punching Or Piercing (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP01470020A 2000-11-20 2001-10-19 Verfahren und Vorrichtung zur Herstellung von Rastkerben auf einem Rahmenrohr für einen Fahrzeugsitz, insbesondere einem Kopfstützen-Rahmenrohr Expired - Lifetime EP1206983B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0014920 2000-11-20
FR0014920A FR2816857B1 (fr) 2000-11-20 2000-11-20 Procede et dispositif de crantage d'un tube d'armature pour un siege de vehicule automobile, notamment un tube d'armature d'appuie-tete

Publications (2)

Publication Number Publication Date
EP1206983A1 true EP1206983A1 (de) 2002-05-22
EP1206983B1 EP1206983B1 (de) 2003-09-10

Family

ID=8856638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01470020A Expired - Lifetime EP1206983B1 (de) 2000-11-20 2001-10-19 Verfahren und Vorrichtung zur Herstellung von Rastkerben auf einem Rahmenrohr für einen Fahrzeugsitz, insbesondere einem Kopfstützen-Rahmenrohr

Country Status (5)

Country Link
US (1) US20020060489A1 (de)
EP (1) EP1206983B1 (de)
JP (1) JP3618712B2 (de)
DE (1) DE60100736T2 (de)
FR (1) FR2816857B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104540610A (zh) * 2012-06-15 2015-04-22 努曼公司 管冲口加工方法以及相关的冲口加工机器
CN106424295A (zh) * 2016-09-19 2017-02-22 江汉大学 薄壁管端圆弧形缺口一次性冲裁装置
CN116274550A (zh) * 2023-01-15 2023-06-23 平湖爱驰威汽车零部件有限公司 一种三叉管件斜口定径模具

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6957796B2 (en) 2003-01-15 2005-10-25 Lear Corporation Hydro-formed seat adjuster system
DE102004043409A1 (de) * 2004-09-02 2006-03-09 Vargus Ltd. Fräswerkzeug, insbesondere Gewindefräser
DE102005027584A1 (de) * 2005-06-14 2006-12-28 Ulrich Huperz Schweißtechnik GmbH & Co.KG Werkstück mit einer nicht-spanend erzeugten Kerbe
DE112007001950T5 (de) 2006-08-21 2009-07-02 Innotec Corporation, Zeeland Elektrische Vorrichtung mit platinenloser Montageanordnung für elektrische Komponenten
US8408773B2 (en) * 2007-03-19 2013-04-02 Innotec Corporation Light for vehicles
US8230575B2 (en) * 2007-12-12 2012-07-31 Innotec Corporation Overmolded circuit board and method
SI2265463T1 (sl) * 2008-03-21 2013-03-29 Innotec, Corp. Okvir naslona za glavo in postopek
DE102008045208B3 (de) * 2008-08-30 2009-10-08 Faurecia Autositze Gmbh Fahrzeugsitz
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
DE102009047020A1 (de) * 2009-08-07 2011-02-17 Thiel & Hoche Gmbh & Co. Kg Kopfstützenträger
CN102500681B (zh) * 2011-09-30 2014-03-12 重庆建设·雅马哈摩托车有限公司 一种摩托车车架管件连接端头加工成形方法
US9022631B2 (en) 2012-06-13 2015-05-05 Innotec Corp. Flexible light pipe
DE102014002233B3 (de) * 2014-02-21 2015-03-19 Grammer Aktiengesellschaft Tragvorrichtung für eine Kopfstütze und Verfahren zur Herstellung einer Tragvorrichtung für eine Kopfstütze
KR101583416B1 (ko) * 2014-05-19 2016-01-13 광명산업(주) 시트구조체 프레임의 스프링 압착 취부장치 및 그 방법
KR102435765B1 (ko) * 2015-09-14 2022-08-24 삼성디스플레이 주식회사 레이저 결정화 장치
US10245653B2 (en) * 2016-08-12 2019-04-02 Robert James Suhling Modular tubing notcher system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB553041A (en) * 1942-02-21 1943-05-05 Rupert Clifford Turtle Improved method of and means for effecting dimpling operations
US4582259A (en) * 1984-09-12 1986-04-15 Hobart Corporation Wash arm and method and apparatus for forming the same
DE29714315U1 (de) * 1997-08-11 1997-12-04 Kohlhage Verbindungstechnik GmbH, 58809 Neuenrade Arretierungsvorrichtung
DE19758003A1 (de) * 1997-01-08 1998-08-06 Volkswagen Ag Widerlager aus Blech zur Anordnung an einem Träger und Verfahren zur Herstellung
EP0974409A1 (de) * 1998-07-21 2000-01-26 Etablissements Garconnet Verfahren zum Herstellen von Rastnuten in Rohren, sowie durch das Verfahren hergestellten Rohre

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB553041A (en) * 1942-02-21 1943-05-05 Rupert Clifford Turtle Improved method of and means for effecting dimpling operations
US4582259A (en) * 1984-09-12 1986-04-15 Hobart Corporation Wash arm and method and apparatus for forming the same
DE19758003A1 (de) * 1997-01-08 1998-08-06 Volkswagen Ag Widerlager aus Blech zur Anordnung an einem Träger und Verfahren zur Herstellung
DE29714315U1 (de) * 1997-08-11 1997-12-04 Kohlhage Verbindungstechnik GmbH, 58809 Neuenrade Arretierungsvorrichtung
EP0974409A1 (de) * 1998-07-21 2000-01-26 Etablissements Garconnet Verfahren zum Herstellen von Rastnuten in Rohren, sowie durch das Verfahren hergestellten Rohre

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104540610A (zh) * 2012-06-15 2015-04-22 努曼公司 管冲口加工方法以及相关的冲口加工机器
CN106424295A (zh) * 2016-09-19 2017-02-22 江汉大学 薄壁管端圆弧形缺口一次性冲裁装置
CN106424295B (zh) * 2016-09-19 2018-04-20 江汉大学 薄壁管端圆弧形缺口一次性冲裁装置
CN116274550A (zh) * 2023-01-15 2023-06-23 平湖爱驰威汽车零部件有限公司 一种三叉管件斜口定径模具
CN116274550B (zh) * 2023-01-15 2023-12-15 平湖爱驰威汽车零部件有限公司 一种三叉管件斜口定径模具

Also Published As

Publication number Publication date
DE60100736T2 (de) 2004-08-05
JP3618712B2 (ja) 2005-02-09
FR2816857B1 (fr) 2003-02-28
JP2002204733A (ja) 2002-07-23
US20020060489A1 (en) 2002-05-23
DE60100736D1 (de) 2003-10-16
EP1206983B1 (de) 2003-09-10
FR2816857A1 (fr) 2002-05-24

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