EP3720627A1 - Procédé de fabrication d'un élément d'assemblage, élément d'assemblage et outil de laminage - Google Patents

Procédé de fabrication d'un élément d'assemblage, élément d'assemblage et outil de laminage

Info

Publication number
EP3720627A1
EP3720627A1 EP18807276.3A EP18807276A EP3720627A1 EP 3720627 A1 EP3720627 A1 EP 3720627A1 EP 18807276 A EP18807276 A EP 18807276A EP 3720627 A1 EP3720627 A1 EP 3720627A1
Authority
EP
European Patent Office
Prior art keywords
rolling
connecting element
blank
spherical
flat
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
EP18807276.3A
Other languages
German (de)
English (en)
Other versions
EP3720627C0 (fr
EP3720627B1 (fr
Inventor
Uwe Wolfarth
Bernd Werthwein
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.)
Arnold Umformtechnik GmbH and Co KG
Original Assignee
Arnold Umformtechnik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arnold Umformtechnik GmbH and Co KG filed Critical Arnold Umformtechnik GmbH and Co KG
Publication of EP3720627A1 publication Critical patent/EP3720627A1/fr
Application granted granted Critical
Publication of EP3720627C0 publication Critical patent/EP3720627C0/fr
Publication of EP3720627B1 publication Critical patent/EP3720627B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/14—Making articles shaped as bodies of revolution balls, rollers, cone rollers, or like bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/002—Fasteners, rivets

Definitions

  • the invention relates to a method for producing a connecting element with at least two spherical sections, wherein two spherical sections adjoin one another directly or wherein two spherical sections are connected to one another by means of a connecting section.
  • a connecting element with two spherical sections is known from the German patent application DE 10 201 1 087 286 A1.
  • the spherical portions immediately adjoin one another.
  • the connecting element is to be very easily and inexpensively made of mass produced individual balls, which only need to be connected together.
  • the connection of the individual balls to the connecting element can be effected for example by welding.
  • Klipsetti be plugged, which in turn are connected to one of the components to be joined together. It is intended to string together more than two balls to form a connecting element.
  • the invention provides an improved method for producing a connecting element, an improved connecting element and an improved rolling tool for producing a connecting element.
  • a method for producing a connecting element with at least two spherical sections, wherein two spherical sections directly adjoin one another or wherein two spherical sections are connected to each other by means of a connecting section, in which the rolling of an at least partially cylindrical, one-piece blank between at least two rolling tools and forming the at least two spherical portions and optionally the connecting portion during rolling.
  • a connecting element with at least two spherical sections can be produced by a single cold forming process.
  • welding the spherical portions to the connecting element can be omitted and in a single operation, both the spherical portions and the connection of the spherical portions are made.
  • the connecting element produced according to the invention can thereby reliably fulfill its intended function of being locked with a clip element.
  • Rolling tools or two flat-rolled jaws can be provided as rolling tools.
  • the blank is preferably circular cylindrical.
  • the blank can be separated from a wire coil by the rolling tool or a separate separator. This facilitates the handling of the blank.
  • the spherical shape can deviate from a spherical shape and, for example, rotationally symmetric shapes can be produced, which are, for example, bulbous than spheres and thereby, if necessary, can provide more material for grouting operations. This can be advantageous if the spherical portions are pressed directly into through holes in sheets and pressed out to secure the press-in position of the spherical portion projections, which then protrude above and below the sheet from the spherical portion.
  • the shaping takes place in the course of 10 to 15 revolutions of the blank.
  • the connecting elements can be produced from a blank without waste, ie without slugs.
  • slugs are generally formed which absorb excess material of the blank, which is not required for the production of the connecting element.
  • a slug arises, for example, the fact that the blank must first be held at one of its ends when inserted into the rolling tool.
  • This slug or two slugs at the opposite ends of the almost completed connecting element can then be separated according to the invention automatically by means of a separating edge on a rolling tool. In this way, the connecting element are completely made by rolling and there are usually no reworking required.
  • the holding of the blank is provided at least before the start of rolling on a feed head of the blank, wherein the feed head is disc-shaped and protrudes in the radial direction over the cylindrical blank except for the feed.
  • Such a disk-like feeding head facilitates the holding of the blank before the start of rolling and thus also the insertion of the blank in the rolling tool.
  • the separation of the feed head takes place together with the separation of one of the slugs.
  • the connecting element can therefore be completely finished by means of a single rolling operation.
  • the blank has a circular cylindrical basic body.
  • the blank may for example be formed as a piece of wire and in particular a disc-like feed head can be made by upsetting the piece of wire.
  • two flat-rolled jaws are provided as rolling tools.
  • the connecting element By means of flat rolling jaws, the connecting element can be produced in large quantities and with low tolerances.
  • each flat-rolled jaw has two channel-shaped recesses which widen and deepen in the intended rolling direction.
  • the two flat rolling jaws are displaced relative to each other, wherein the blank is received between the flat rolling jaws.
  • the blank rolls off on the two flat-rolled jaws and is thereby simultaneously deformed.
  • the forming is carried out by the widening channel-shaped recesses gradually from the cylindrical, in particular circular cylindrical, blank to the spherical portions. As stated, it takes about 10 to 15 turns of the blank to fully mold the connector.
  • the two channel-shaped recesses are separated by means of a parallel to the intended rolling direction center web.
  • the problem underlying the invention is also solved by a connecting element with at least two spherical sections, wherein two spherical sections adjoin one another directly or wherein two spherical sections are connected to each other by means of a connecting portion, wherein the connecting element of a one-piece blank by means of rollers between at least two Rolling tools is made.
  • two ball-like sections adjoin one another directly and are separated from one another by means of a constriction, wherein at the thinnest point of the constriction a diameter of the connecting element is between one-third and one-half of a diameter of the spherical sections.
  • a rolling tool for producing a connecting element with the method according to the invention, in which the rolling tool has two flat rolling jaws, each flat rolling jaw having two groove-shaped recesses which widen and deepen in the intended rolling direction.
  • the two channel-shaped recesses are separated by means of a parallel to the intended rolling direction center web.
  • at least one of the channel-shaped recesses is provided on its side opposite the central web side at least in one end section with the greater width and depth of the recess with a separating edge which extends beyond a central longitudinal axis of the manufactured connecting element to separate a slug.
  • the separating edge By means of such a separating edge, it is possible during the last revolution or even the last turns during the rolling process to separate the slug at the same time. For example, the separating edge extends beyond an angle of 180 ° in spherical sections. Thus, when the almost completed connecting element, on which the slug still hangs, is moved into the region of the separating edge, the separating edge during further unrolling of the almost completed connecting element on the two flat rolling jaws ensures that the slug is severed.
  • the central web has a substantially constant width over the entire length of the respective flat-rolled jaw.
  • FIG. 1 is a side view of a blank for producing a connecting element with the method according to the invention
  • FIG. 2 shows a plan view of a flat rolling jaw of a rolling tool for use in the method according to the invention
  • FIG. 3 is a schematic plan view of an inventive connecting element with two already separated slugs
  • FIG. 4 shows a schematic sectional view of the flat-rolled jaw of FIG. 2 with a connecting element according to the invention arranged therein
  • FIG. Fig. 5 is a schematic, sectional plan view of a rolling tool for
  • FIG. 6 shows a schematic, section-wise side view of a further rolling tool according to the invention for producing the connecting element according to the invention
  • Fig. 7 is a partially schematic plan view of a flat roll of a
  • Fig. 8 is a connecting element according to another embodiment of the invention.
  • Fig. 1 shows a side view of a blank 10 for producing a connecting element with the method according to the invention.
  • the blank 10 has a circular cylindrical base body 12 and a disc-like feed section 14.
  • the disk-like Zuferrabites 14 projects in the radial direction beyond the circular cylindrical body 12 also.
  • the feed section 14 serves to hold the blank 10 during the feeding of the blank 10 to a rolling tool and optionally to guide during the beginning of the rolling process.
  • the feed section 14 is automatically separated at the end of rolling in the method according to the invention. This will be explained below.
  • the circular-cylindrical basic body 12 is formed during rolling into two spherical sections of the connecting element and optionally a connecting section between the two spherical sections. At both ends of the circular cylindrical body 12 is formed during rolling a slug, see Fig. 3, which receives excess material and is automatically separated at the end of rolling.
  • Fig. 2 shows a plan view of a flat roll jaw 16 for use in the inventive method.
  • two identical flat rolling jaws 16 are used, which receive the blank 10 between them and are then displaced relative to one another.
  • By this sliding movement of the blank 10 then rolls on the flat roller jaw 16, in Fig. 2 from left to right, and is at the same time between the two flat-rolled jaws to the invention Reshaped connecting element.
  • the forming takes place by rolling and consequently by cold forming.
  • the flat-rolled jaw 16 has a main body 18 in the form of an elongated cuboid, see also FIG. 4.
  • a main body 18 in the form of an elongated cuboid, see also FIG. 4.
  • two channel-shaped recesses 20, 22 are provided, which in the intended rolling direction, in Fig. 2 so from left to right, widen and deepen.
  • the two channel-shaped recesses 20, 22 are separated over their entire length by a central web 24, see also Fig. 4.
  • the central web 24 has over the entire length of the flat roll jaw 16 has a constant width.
  • each still several, successively arranged ribs 30 are arranged.
  • the ribs 30 each form a driving track, but extending only between about a third and half of the length of the channel-shaped recesses 20, 22 parallel to this.
  • the ribs 30 which form the driving tracks serve at the beginning of the rolling process to take the blank so that it does not slip relative to the flat rolling jaws 16, but rolls on the flat rolling jaws 16.
  • the blank 10 is completely formed in the course of about 10 to 15 revolutions relative to the flat rolling jaws 16 to the connecting element 40, which is shown in Fig. 3.
  • the side edges 26, 28 of the flat roll jaw 16 are formed as separating edges and extend over the central longitudinal axis of the blank 10 or of the almost completed connecting element 40 addition.
  • the finished connecting element 40 and its central longitudinal axis 42 can be seen.
  • a slug 44, 46 can be seen, wherein the top in Fig. 3 slug is still connected to the feed section 14.
  • the slugs 44, 46 form outside the channel-shaped recesses 20, 22, since excess material from the channel-shaped recesses 20, 22 is displaced and flows into the slugs 44, 46.
  • These slugs are, when the blank 10 reaches the region of the end portion 32 of the channel-shaped recesses 20, 22, see Fig. 2, still integrally connected to the blank 10.
  • the outer side edges of the channel-shaped recesses 20, 22 extend beyond the central longitudinal axis 42 of the connecting member 40 and are each formed as a separating edge, the slugs 44, 46 during the rolling of the blank 10 and the almost completed connecting element 40th separated from the connecting element 40.
  • the connecting element 40 After the connecting element 40 then leaves the end portion 32, the state of Fig. 3 is reached. As can be seen, the connecting element 40 is completely formed and the slugs 44, 46 have been automatically separated from the connecting element 40.
  • the connecting element 40 In the case of two identical flat-rolled jaws 16, only one side edge, for example the side edge 28, is designed as a separating edge. Since the two flat rolling jaws 16 are placed on top of each other, the separating edge on the lower flat rolling jaw 16 can separate a slug and the separating edge on the upper flat roll jaw the other slug.
  • the connecting element 40 has a first ball-like portion 46 and a second ball-like portion 48, each having the same diameter and being separated from one another by a constriction 50.
  • the two ball-like sections 54, 56 are integrally connected to one another in the region of the constriction 50, since they have been formed by cold forming during the rolling of the blank 10.
  • the diameters of the two spherical portions 54, 56 are the same size and the diameter in the region of the constriction 50 is about one third to one half of the diameter of the spherical portions 54, 56th
  • the connecting element 40 is used to connect two workpieces.
  • the two workpieces are each connected to a Klipselement having a ball-like and the ball-like sections 54, 56 matching recess and consists of an elastically resilient material, such as a suitable plastic.
  • the ball-like portion 54 of the connecting element 40 is then clipped into the clip element of the first workpiece and the spherical portion 56 in the clip element of the second workpiece.
  • the two workpieces are then securely connected to each other via the connecting element 40.
  • FIG. 4 The illustration of FIG. 4 is schematic. During rolling, the blank 10 lies between two flat rolling jaws 16, wherein an upper flat rolling jaw is not shown in FIG. 4 for the sake of clarity.
  • FIG. 4 schematically shows the state in which the connecting element 40 has already been completely formed and the connecting element 40 is thus located in the end section 32 of the channel-shaped recesses 20, 22, cf. Fig. 2.
  • the slugs 44, 46, cf. Fig. 3 already completely separated.
  • the side edges 26, 28 extend beyond the central longitudinal axis 42 of the connecting element 40 in the end region 32.
  • the connecting element 40 can be completely formed in a single rolling process. At the end of this rolling operation, the slugs 44, 46 are cut off, so that the connecting element 40 is then completely finished.
  • FIG. 5 shows a schematic, sectional plan view of a rolling tool 60 according to a further embodiment of the invention, wherein only one, in the representation of FIG. 5 under a blank 62 lying flat roll jaw 64 is shown.
  • the flat roll jaw 64 is substantially identical to the flat roll jaw of FIG. 2.
  • the blank 62 does not have a feed section and is rather separated at the beginning of the rolling track of the flat roll jaw 64 by a supplied wire 66, for example by a wire coil by means of a cutting tool 68 shown schematically in the required length.
  • the separating tool 68 may be formed, for example, as a shearing device, as a saw or the like.
  • the separation of the cylindrical blank 62 only when the blank 62 is already arranged in the rolling tool 6ß facilitates the handling of the blank 62 considerably, especially the wire 66 is supplied for example by a Drahtcoil. As long as the blank 62 is still connected to the remaining wire 66, the blank can be easily inserted between two flat rolling jaws of the rolling tool 60. Only when the end portion of the wire 66, which later forms the blank 62, is correctly positioned relative to the rolling tool 60, and specifically, as shown in FIG. 5, is positioned at the beginning of the rolling path of the flat rolling jaws 64 will the blank 62 become the remainder of the wire 66 separated by means of the separating tool 68.
  • FIG. 6 shows a sectional side view of a rolling mill train 70 according to a further embodiment of the invention.
  • the rolling tool 70 has a lower flat roll jaw and an upper flat roll jaw 74, which may be formed identical to each other and receive the cylindrical blank 62 between them.
  • the blank 62 may, as explained with reference to FIG. 5, form the free end of a wire 66.
  • the two flat rolling jaws 72, 74 are each provided with a separating edge 76, 78, which are intended to separate a piece of the wire at the beginning of the rolling movement and thereby form the blank 62.
  • the lower flat roll jaw 72 is moved to the left and the upper flat roll jaw 74 is moved to the right.
  • a height of the separating edge 76 of the lower flat roll jaw 72 increases from left to right in FIG. 6, and a height of the separating edge 78 of the upper flat roll jaw 74 increases from right to left in FIG. If the two flat rolling jaws 72, 74 are thus moved horizontally to the left or right in FIG.
  • the separating edges 76 and 78 penetrate into the material of the wire and at the respective higher end of the separating edges 76, 78 the blank 62 is then completely removed Wire separated.
  • the blank 62 does not have to be held by separate devices but is moved as a free end of a wire in the position shown in Fig. 6 between the two flat rolling jaws 72, 74.
  • the flat rolling jaws 72, 74 are then moved to the left and right, respectively, according to the arrows shown in FIG. 6, the blank 62 is already clamped between the flat rolling jaws 72, 74. After separating the blank 62 from the wire, the blank 62 is then securely held between the two flat rolling jaws 72, 74.
  • FIG. 7 shows a schematic plan view of a connecting element 80 according to the invention and an end section of a flat-rolled jaw 72.
  • the flat-rolled jaw 72 is identical to the flat-rolled jaw 16 of FIG.
  • the connecting element 80 according to the invention is, however, without waste from a blank 62, cf. Fig. 5, Fig. 6, produced.
  • the blank 62 is formed without the slug, converted to the connecting element.
  • the blank 62 as shown in FIGS. 5 and 6, for example, be cylindrical and formed as a portion of a wire 66.
  • FIG. 8 shows schematically another connecting element 90 according to the invention.
  • the lower spherical section 92 in FIG. 8 is designed to be bulbous in the middle region than the upper spherical section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Forging (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un élément d'assemblage (40) comprenant au moins deux sections sphériques (54, 56), les deux sections sphériques étant directement adjacentes ou les deux sections sphériques étant reliées par l'intermédiaire d'une section d'assemblage, selon ledit procédé comprenant le laminage d'une pièce brute monobloc, cylindrique au moins par endroits, entre au moins deux outils de laminage et la mise en forme des au moins deux sections sphériques et éventuellement de la section d'assemblage pendant le laminage. L'invention concerne un élément d'assemblage et un outil de laminage destiné à la fabrication d'un élément d'assemblage.
EP18807276.3A 2017-12-07 2018-11-19 Procédé de fabrication d'un élément d'assemblage Active EP3720627B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017222146.1A DE102017222146A1 (de) 2017-12-07 2017-12-07 Verfahren zum Herstellen eines Verbindungselements, Verbindungselement und Walzwerkzeug
PCT/EP2018/081769 WO2019110287A1 (fr) 2017-12-07 2018-11-19 Procédé de fabrication d'un élément d'assemblage, élément d'assemblage et outil de laminage

Publications (3)

Publication Number Publication Date
EP3720627A1 true EP3720627A1 (fr) 2020-10-14
EP3720627C0 EP3720627C0 (fr) 2023-10-18
EP3720627B1 EP3720627B1 (fr) 2023-10-18

Family

ID=64426912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18807276.3A Active EP3720627B1 (fr) 2017-12-07 2018-11-19 Procédé de fabrication d'un élément d'assemblage

Country Status (5)

Country Link
US (1) US11779999B2 (fr)
EP (1) EP3720627B1 (fr)
CN (1) CN111788022B (fr)
DE (1) DE102017222146A1 (fr)
WO (1) WO2019110287A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1337640A (en) * 1915-02-23 1920-04-20 Ferdinand E Canda Method of rolling balls and other objects of rotation
US1469174A (en) * 1916-11-25 1923-09-25 John R Blakeslee Method of making spherical articles
US1525223A (en) * 1924-04-25 1925-02-03 Canda Ferdinand Mora Apparatus for making balls
US3206828A (en) * 1963-02-16 1965-09-21 Taiyu Shoji Kk Method of making balls
US4489581A (en) * 1981-05-26 1984-12-25 Fiziko-Tekhnichesky Institut Akademi Nauk Belorusskoi Ssr Method of manufacturing articles by deformation of cylindrical blanks
DE3229605A1 (de) * 1981-08-21 1983-04-07 E.W. Menn KG, Maschinenfabrik, 5912 Hilchenbach Vorrichtung zur herstellung runder laenglicher werkstuecke
JP4310295B2 (ja) * 2005-07-26 2009-08-05 株式会社三明製作所 転造ダイスおよびこれを用いたボール状部付き軸部品の製造方法
DE102011087282A1 (de) 2011-08-03 2013-02-07 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Verbinden zweier Bauteile sowie Bauteilverbindung
CN103111563A (zh) * 2013-01-18 2013-05-22 杨晓明 一种钢球连续轧制方式及设备
CN104707865A (zh) * 2015-03-30 2015-06-17 北京科技大学 一种阳极锡球斜轧成形装置及方法

Also Published As

Publication number Publication date
EP3720627C0 (fr) 2023-10-18
US11779999B2 (en) 2023-10-10
WO2019110287A1 (fr) 2019-06-13
US20200384524A1 (en) 2020-12-10
CN111788022A (zh) 2020-10-16
DE102017222146A1 (de) 2019-06-13
EP3720627B1 (fr) 2023-10-18
CN111788022B (zh) 2023-04-07

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