EP0531477A1 - Dispositif de fabrication de presses-t les a ressort tout-metal. - Google Patents

Dispositif de fabrication de presses-t les a ressort tout-metal.

Info

Publication number
EP0531477A1
EP0531477A1 EP92906501A EP92906501A EP0531477A1 EP 0531477 A1 EP0531477 A1 EP 0531477A1 EP 92906501 A EP92906501 A EP 92906501A EP 92906501 A EP92906501 A EP 92906501A EP 0531477 A1 EP0531477 A1 EP 0531477A1
Authority
EP
European Patent Office
Prior art keywords
winding
knitted
mandrel
sleeve
knitted fabric
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
EP92906501A
Other languages
German (de)
English (en)
Other versions
EP0531477B1 (fr
Inventor
Lothar Schaefer
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.)
Hutchinson Stop Choc GmbH and Co KG
Original Assignee
Stop Choc Schwingungstechnik 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 Stop Choc Schwingungstechnik GmbH and Co KG filed Critical Stop Choc Schwingungstechnik GmbH and Co KG
Publication of EP0531477A1 publication Critical patent/EP0531477A1/fr
Application granted granted Critical
Publication of EP0531477B1 publication Critical patent/EP0531477B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
    • B21F27/16—Making special types or portions of network by methods or means specially adapted therefor for spring mattresses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/14—Shredding metal or metal wool article making
    • Y10T29/147—Metal wool bundling

Definitions

  • the invention relates to a device for producing ' all-metal spring cushions from knitted metal pieces.
  • All-metal feather pillows have hitherto been produced as follows: on a circular knitting machine, the metal wire is knitted into a tube, which is then laid out to form a double-layer tape. This is provided with a transverse corrugation (embossing). Pieces of a predetermined length are cut from the embossed tape and rolled up into a roll. The end of the knitted piece is fixed to the winding by hand crocheting, and the knitted winding obtained in this way is put into a press mold by hand and pressed together in a press, the individual wires of the knitted layers coming into close frictional engagement with one another and the feather pillow the desired one Receives final geometry.
  • the present invention is intended to provide a device for producing all-metal spring cushions, which enables largely automated production without human intervention, in particular eliminating the manual insertion of the knitted fabric into the press mold.
  • the object is achieved according to the invention by a manufacturing device according to claim 1.
  • the knitted pieces are wound inside a winding tube, which also serves as an insertion aid for a compression tube. So that the finished Gewirkwickel can be easily machined before ⁇ the reel ation n the press station converted: be.
  • a device according to claim 3 is characterized by a particularly simple mechanical structure. In addition, there is no joint between the mandrel and the mandrel. The press ram can easily be moved over the mandrel.
  • the development of the invention according to claim 6 also serves to fix the knitted piece end to the winding without a counterelectrode inserted into the winding by micro-welding. increase.
  • gripping means which can be extended from the winding mandrel can be implemented and actuated in a particularly simple manner.
  • the development of the invention according to claim 9 is advantageous with regard to the high throughput of the manufacturing device, since the winding and closing of the knitted packages and the pressing can be carried out simultaneously in different, spatially separate work stations.
  • a feed rail via which the knitted piece is fed to the winding station, can be arranged in a spatially fixed manner. It does not need to be moved out of the step table path when moving the indexing table.
  • the winding station has a mechanically clear structure as a whole, since the counter electrode and the winding mandrel in opposite direction are pulled out of the winding sleeve open on the side.
  • Figure 1 is a schematic Au view of a machine for producing all-metal spring cushions
  • FIG. 2 a transverse section through a winding station of the machine shown in FIG. 1;
  • FIG. 3 shows an axial section through the winding station according to FIG. 2 along the section line there
  • Figure 6 is a block diagram of a controller for the take-up station of the machine of Figure 1;
  • FIG. 8 a longitudinal section through a combined winding / pressing station
  • Figure 9 an axial view of the drive side
  • 10 designates a machine bed which carries a winding station, designated overall by 12, in which, in practice, 1-2 m long knitted pieces of spring wire are used to form a knitted roll with a diameter of, for example, 4 cm and a height of 5 cm, for example, is wound and the end of the knitted piece is attached to the winding by micro-welding.
  • Winding sleeves 14, in which this winding and closing of the knitted fabric takes place in the manner described in more detail below, are fastened to arms 16 of a step indexing table 18, designated overall by 18, which can be moved in 90 ° steps about a horizontal axis by a drive 20 is.
  • the machine bed 10 also carries a pressing station, designated as a whole by 22, which lies opposite the winding station 12 with respect to the axis of the indexing table 18 and in which the knitted fabric rolls axially to form a spring cushion be compressed, the height of which is approximately half the initial height of the reel.
  • a pressing station designated as a whole by 22 which lies opposite the winding station 12 with respect to the axis of the indexing table 18 and in which the knitted fabric rolls axially to form a spring cushion be compressed, the height of which is approximately half the initial height of the reel.
  • the winding station 12 will now be described in detail with reference to FIGS. 1-5:
  • a winding drive 24 drives a winding mandrel, identified overall by 26. This has a flange 28 which, with play, can engage somewhat from one end in the respective winding tube 14 standing in the winding station, as shown in FIG. 3.
  • a front winding section 30 of the winding mandrel 26 extends essentially through the entire winding sleeve 14 and carries on its outer surface four sets of driving wires 32 which are set in the winding direction (arrow 34).
  • a feed window 36 is provided in the circumferential wall of the winding sleeves 14, which are open on both sides and are butted against the associated arms 16. Its lower bounding flap 38 lies somewhat higher than the uppermost part line of the winding section 30, so that the free end of a knitted piece 40 during the cantilevered advancement over the boundary surface 38 above the winding section 30 into the web in the direction of the Arrows 34 circumferential drive wires 32 and is taken along by the winding mandrel 26.
  • the upper boundary surface 42 of the feed window 36 extends tangentially to the inner surface of the winding tube 14.
  • a feed rail 44 is provided which has a bottom wall 46 and lateral guide walls 48.
  • a transverse circular guide rod 50 ' is provided with a transverse bar 52 lying in front of it forms the zusam ⁇ men an insertion funnel for the Gewirk choir 40 and holds the knitted piece on the bottom wall 46, so that it assumes a defined position with respect to a light barrier 54, which transmits a transmission embedded in the bottom wall 46 !! 56 and a receiver part 58 arranged in alignment in the strip 52.
  • FIG. 2 the path of the outermost surface line of the winding sleeve 14 is indicated by a dashed circle 60, the path of the innermost surface line by a dashed circle 62.
  • the end face of the feed rail 44 is tangential to Circle 60 arranged.
  • a welding device, designated as a whole by 64, is provided tangentially to the circle 62 substantially opposite it. This comprises three welding electrodes 70 which can be displaced in bores 66 of a housing 68 and which are each guided via an insulating sleeve 72 in the associated bore 66.
  • bores 74 of the winding sleeve are aligned with the bores 66, so that the ends of the welding electrodes 70 can be moved against the surface of the knitted fabric 76 produced in the winding sleeve 14, the end of the welding electrodes 70 in the Bores 74 are guided in a manner similar to that in the bores 66.
  • the welding electrodes 70 are biased by springs, not shown, so that they are elastically adjusted during welding after softening the knitted material.
  • the welding electrodes 70 work together with a cylindrically curved counterelectrode 78 which is carried by an electrode shaft 80, as can be seen in particular from FIG.
  • the electrode shaft 80 is provided with a flange 82 which closes the right-hand end of the winding tube 14 in a similar manner to that which the flange 28 does for the left-hand tube end.
  • the flange 82 is in the center formed with a recess 84 into which the end of the winding section 30 can engage with play.
  • the counter electrode 78 is the largest. Part of the winding process is parked under the feed window 36, as shown in FIGS. 2 and 3.
  • An electrode drive 88 which works on the electrode shaft 80, is controlled by a second light barrier 86 located in front of the light barrier 54.
  • the position of the second light barrier 86 is selected so that after the counter-electrode 78 has been put into rotation (also in the sense of the arrow 34), a full number of knitted bearings are wound over the counter-electrode 78 and the end of the knitted piece 40 is around the size of the welding spots behind the center of the counter electrode 78. This really fixes the outer end of the knitted piece 40 to the knitted roll 40, and there are no protruding ends which would impair later handling of the knitted roll, but also of the finished spring cushion. Details of the
  • the winding drive 24 is seated on a first chute 90 which can be moved parallel to the axis of the indexing table 18 and which is moved by a double-acting hydraulic working cylinder 92.
  • the electrode drive 88 sits on a carriage 94 which is moved by a double-acting working cylinder 96.
  • the winding mandrel 26 and the counterelectrode 78 can thus be pulled out in the axial direction from the knitted roll 14 produced in the winding tube 12 in the winding station 12, and this winding tube 14 can then be pulled through the step table 18 are first moved into an intermediate 90 position and then into a 180 ° pressing position.
  • the inner surface of the winding tube can be provided with closely adjacent semicircular sliding ribs 98, as shown in FIG. 1.
  • each winding mandrel 26 and counterelectrode 78 are moved axially into the interior of the respective winding tube 14, so that one in each case at the beginning of a winding process 2 and 3 has the initial conditions shown.
  • the winding drive 24 can be connected to a mains line 104 via a controllable switch 102 in order to set the winding mandrel 26 in the direction of the arrow 34.
  • the switch 102 is controlled from the "1" output of a bistable multivibrator 106 whose set output "S" is connected to the output of the first light barrier 54.
  • all components that can be triggered by edges should be components that respond to rising signal edges.
  • the output signal of the second light barrier 86 is given to the set input of a further bistable multivibrator 108, the "1" output of which is connected to the control terminal of a further switch 110.
  • the electrode drive 88 can be connected to the power line 104 via the latter.
  • the winding drive 24 and the electrode drive 88 are stopped simultaneously by resetting the two bistable toggle switches 106 and 108 as a function of the falling signal flank of the light barrier 54 by means of a specially designed digital residual angle control circuit 112.
  • the residual heating control circuit 112 is connected to a resolver 114, which cooperates with the winding drive 24 and outputs a pulse for a given angular increment, the output signal of which is transmitted to an auxiliary counter 118 via an AND gate 116.
  • a small distance in front of the light barrier 54 is a further light barrier 120, the output signal of which is connected via an inverter 122 to the set terminal of a bistable multivibrator 124. Their "i" output.g drives the second terminal of the AND gate 116. At the same time the flip-flop 124 is set, the auxiliary counter 118 is also reset to zero.
  • the flip-flop 124 is supplied with the output signal of the light barrier 54 via an inverter 126.
  • the level obtained in the auxiliary counter 118 thus corresponds to the number of angular increments of the winding drive 24 that were required to move the end of the knitted fabric from the light barrier 120 to the light barrier 54. This number depends on the respective radius of the knitted fabric 76. From this number it can now be calculated with better accuracy by how many angular steps the winding drive 24 has to be moved further so that the end of the knitted piece 40 comes to lie directly in front of the welding electrodes 70 .
  • This conversion is carried out digitally in such a way that a correction memory 128 is controlled with the output signal of the auxiliary counter 118, in which the corresponding angle values were previously stored.
  • the applicable residual angle value is entered as an increment number on the presetting terminals PR Given counter 130.
  • the correction memory 128 and the counter 130 are activated via delay elements 132, 134 from the "0" output of the flip-flop 124.
  • the output signal of the delay element 134 simultaneously turns on an AND gate 136, via which the output pulses of the resolver 114 are passed to a down-counter terminal of the counter 130.
  • the output signal at the sign terminal S of the counter 130 can then be used via an inverter 138 to reset the bistable flip-flops 106 and 108.
  • the end of the knitted fabric now lies just before the welding electrodes 70.
  • the "0" output signal of the bistable multivibrator 106 simultaneously triggers a monostable multivibrator 142 via a delay circuit 140, the period of which is somewhat longer than the time required for the end of the article to be welded to the knitted package.
  • This controls a switch 144, via which a second supply terminal of the winding drive 24 can be connected to the power line 104, when the winding drive 24 is acted upon in the arrow 34 in the opposite direction. In this direction of rotation, the driving wires 32 work out of the knitted package 76.
  • the period of the flip-flop 142 corresponds to the time required to pull the winding mandrel 26 out of the knitted fabric.
  • the output signal of the monostable multivibrator 142 is provided on a line 146 in order to bring about a simultaneous axial pulling out of the winding mandrel 26 and counterelectrode 78 from the knitted winding 76 by corresponding pressurization of the working cylinders 92, 96.
  • a winding tube 14 each with a press tube 148 such that the inner surfaces of both tubes merge into one another flush.
  • the press sleeve 148 is fixedly connected to the machine bed 10 by a holder 150. Its bottom is formed by a slide 152 which runs in guide grooves 154 fixed to the frame.
  • a press mandrel 156 is guided through the slide 152 and is connected to the piston rod 158 of a double-acting working cylinder 160.
  • a PreiSstempei 162 is movable into by the Wickelhüise 14 in the pressure sleeve 148 and this pushes the Gewirk ⁇ winding 76 in the pressure sleeve 148 and to de 'n press mandrel 156.
  • the extrusion die 162 has a central bore 164, can run into the press mandrel soft 156th When the plunger 162 is advanced further by the associated press cylinder 166, the knit wrap 76 between the slide 152 and the end face of the plunger 162 is compressed.
  • the pressure cylinder 166 is then relieved and the pressing mandrel 156 is pulled out of the finished spring cushion by the working cylinder 160, which is indicated by dashed lines in FIG. 7 at 168.
  • the mandrel 156 is retracted as far as behind the slide 152, so that the latter can subsequently be moved away in the direction perpendicular to the plane of FIG. 7 by a double-acting working cylinder 170 (cf. FIG. 1).
  • the finished spring cushion is then ejected from the press sleeve 148 and reaches a delivery chute 172.
  • the press die 162 is moved back into the starting position shown in FIG. 7, as is the slide 152 and the press mandrel 156. Thereafter, a further winding sleeve 14 with a further knitted winding 76 can be moved into the press station 22.
  • the nickel sleeve 14 is now made of electrically insulating material, e.g. made of a ceramic material and connected directly to the compression sleeve 148 by means of bolts 174.
  • the winding mandrel 26 has a shaft section 176 which is rotatably guided through the press ram 162, and the pressing mandrel 156 is formed directly on the winding mandrel 26
  • the bore 164 has a larger diameter, the rear bore section 178, which can accommodate the resilient driving wires 32 with play, while a bore section 180 which supports the pressing surface and matches the pressing mandrel 156 has only a short axial dimension.
  • a rotary drive for the winding mandrel 26 is located behind the press ram 162 and is again mounted on a slide similar to that shown in FIG. 1.
  • the combined winding / pressing station according to FIG. 8 operates in the same way as described above.
  • the end of the knitted piece is welded tight by the welding device 64 to be considered above the plane of the drawing, without a separate counter electrode.
  • the lower layers of the knitted fabric in connection with the winding mandrel 26 serve as counterelectrode. Since the winding sleeve 14 is electrically non-conductive, a defined current away from the welding electrodes in the radial direction is also obtained in this way.
  • the die in the device according to FIG. 8 simply becomes! 162 moved against the slide 152. 8 is sufficiently compacted, the winding drive is moved to the left in FIG. 8, whereby the pressing mandrel 156 is pulled out of the slide 152 and the finished spring cushion. Then the slide 152 is moved away and the spring cushion is pushed out by further pushing the plunger 162.
  • the driving wires 32 can also be made essentially retractable into the surface of the winding mandrel 26, as shown in FIG. 9.
  • the drive wires 32 are carried tangentially running away from an actuating shaft 182 and penetrate openings or slots 184 in the now designed winding mandrel 26, which allow tilting.
  • the actuating shaft 182 is connected to the winding drive and takes over a dead angle acting in the angular direction. gear connection 186 with the winding mandrel 26.
  • the friction between the knit winding 76 and the winding tube 14 or the inertia of the winding mandrel 26 is sufficient for changing over the lost motion connection.
  • the driven part of the lost motion connection can be braked by an additional brake 188, which can be a magnetic brake that is only energized when switching.
  • the microweldings can also be produced by microflames, which are directed through the bores 74 against the end of the knitted fabric 76. These microflames can either be flames generated by gas combustion or arcs maintained between two electrodes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Springs (AREA)
  • Bedding Items (AREA)
  • Artificial Filaments (AREA)
  • Forging (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

Afin de fabriquer une presse-tôle à ressort tout-métal, une toile métallique tissée en fil d'acier à ressort est enroulée sur un mandrin (14) d'enroulement, l'extrémité de la toile métallique étant fixée par micro-soudage à la bobine (76) de toile métallique enroulée dans le mandrin d'enroulement (14). Dans une station de moulage par compression (22), le mandrin d'enroulement (14) est positionné en alignement précis devant une douille de compression (148) de même diamètre intérieur, à fleur de celle-ci. Un fouloir (162) pousse la bobine de toile métallique enroulée dans la douille de compression (148), où elle est comprimée jusqu'à former une presse-tôle à ressort. La presse-tôle est ensuite éjectée de la douille de compression.
EP92906501A 1991-03-25 1992-03-14 Dispositif de fabrication de presses-toles a ressort tout-metal Expired - Lifetime EP0531477B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4109738 1991-03-25
DE4109738A DE4109738C2 (de) 1991-03-25 1991-03-25 Vorrichtung zum Herstellen von Ganzmetall-Federkissen
PCT/EP1992/000564 WO1992016321A1 (fr) 1991-03-25 1992-03-14 Dispositif de fabrication de presses-tôles a ressort tout-metal

Publications (2)

Publication Number Publication Date
EP0531477A1 true EP0531477A1 (fr) 1993-03-17
EP0531477B1 EP0531477B1 (fr) 1995-07-19

Family

ID=6428142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92906501A Expired - Lifetime EP0531477B1 (fr) 1991-03-25 1992-03-14 Dispositif de fabrication de presses-toles a ressort tout-metal

Country Status (6)

Country Link
US (1) US5289853A (fr)
EP (1) EP0531477B1 (fr)
AT (1) ATE125179T1 (fr)
CA (1) CA2083373C (fr)
DE (2) DE4109738C2 (fr)
WO (1) WO1992016321A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10106595A1 (de) * 2001-02-09 2002-08-22 Stop Choc Schwingungstechnik Gmbh & Co Kg Verfahren zum Herstellen eines hülsenförmigen Zwischenprodukts aus Federstahlgewirk
CN103182463A (zh) * 2013-03-06 2013-07-03 哈尔滨工程大学 一种金属橡胶减震垫的制作方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2334263A (en) * 1941-06-03 1943-11-16 Metal Textile Corp Foraminous body and method of producing the same
DE1078525B (de) * 1954-06-14 1960-03-31 Hugo Buettner Verfahren zum Herstellen von Doppelkegelfederreihen fuer Federeinlagen od. dgl.
DE1166735B (de) * 1961-03-23 1964-04-02 Willi Gerstorfer Maschine zum Herstellen von aus Stahldraht bestehenden Druckfederbaendern zur Bildung von Federeinlagen fuer Polsterungen
US3437457A (en) * 1965-04-13 1969-04-08 Huyck Corp Reinforced metal fiber composites
US4343335A (en) * 1980-03-27 1982-08-10 Kao Soap Company, Ltd. Process and apparatus for manufacturing soap pads
DE3812820C2 (de) * 1988-04-16 1998-02-19 Stop Choc Schwingungstechnik Gmbh & Co Kg Federkissenmaterial, hieraus hergestelltes Federkissen sowie Anlage zur Herstellung des Federkissenmaterials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9216321A1 *

Also Published As

Publication number Publication date
WO1992016321A1 (fr) 1992-10-01
ATE125179T1 (de) 1995-08-15
EP0531477B1 (fr) 1995-07-19
DE59202936D1 (de) 1995-08-24
DE4109738C2 (de) 2001-03-22
US5289853A (en) 1994-03-01
DE4109738A1 (de) 1992-10-01
CA2083373C (fr) 2003-01-28
CA2083373A1 (fr) 1992-09-26

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