DK161346B

DK161346B - METHOD AND APPARATUS FOR THE MANUFACTURING OF THICKNESS PLATES AS REFLECTORS FOR LIGHT PIPE FITTINGS

Info

Publication number: DK161346B
Application number: DK82888A
Authority: DK
Inventors: Hans Moeller Thomsen
Original assignee: Elselskabet Riegens A S
Priority date: 1988-02-18
Filing date: 1988-02-18
Publication date: 1991-06-24
Also published as: DK82888A; WO1989007735A1; DK82888D0; DK161346C; AU3195989A

Description

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Den foreliggende opfindelse angår en fremgangsmåde og et anlæg til fremstilling af produkter opbygget af to langstrakte sideskaller og et antal derimellem anbragte tværdele, navnlig reflektorer til lys-stofarmaturer. Sådanne reflektorer fremstilles traditionelt ved, at 5 de nævnte sideskaller tildannes med en ønsket buet tværsnitsform ud fra et strimmelmateriale af tyndmetal, fx 0,5 mm aluminium, medens tværdelene tildannes som i hovedsagen V-formede elementer ligeledes frembragt i tynd metalplade med passende buede sider. Tværdelene tjener herved både som skærmelementer og som elementer til koncen-10 trering af lyset i nedgående retning, ligesom det er væsentligt, at de danner en fast forbindelse mellem sideskallerne, således at hele reflektorelementer kan fremtræde som en selvbåret, fast enhed, der kan indmonteres i et lysrørsarmatur.The present invention relates to a method and a plant for the manufacture of products made of two elongated side shells and a plurality of transverse parts disposed therebetween, in particular reflectors for light fixture fittings. Such reflectors are traditionally made by forming said side shells with a desired curved cross-sectional shape from a thin metal strip material, eg 0.5 mm aluminum, while forming the cross members as generally V-shaped elements also produced in thin metal plate with suitably curved sides. . The transverse parts thereby serve as both screen elements and as elements for concentrating the light in the downward direction, and it is essential that they form a fixed connection between the side shells, so that whole reflector elements can appear as a self-supporting, fixed unit which can be mounted in a fluorescent lamp.

Også de V-formede tværdele fremstilles hensigtsmæssigt i et tilsva-15 rende tyndplademateriale, og udover selve fremstillingen af de pågældende dele er det herved væsentligt, hvordan man rationelt kan håndtere delene og udvirke en sådan forbindelse mellem dem, at der kan opnås en fast, selvbærende struktur af reflektorelementet.Also, the V-shaped transverse parts are conveniently manufactured in a corresponding thin sheet material, and in addition to the actual fabrication of the parts in question, it is thus essential how to handle the parts rationally and make such a connection between them that a solid, self-supporting structure of the reflector element.

Ved den nævnte grundopbygning af disse elementer er det naturligt, at 20 sideskallerne forberedes med huller til optagelse af endedele af tværdelene med den ønskede indbyrdes afstand mellem tværdelene, og at tværdelene modsvarende tildannes med udragende endedele eller flige, som kan indføres i disse huller og derved fæstnes på egnet måde til sideskallerne.In the said basic construction of these elements, it is natural that the side shells be prepared with holes for receiving end portions of the transverse parts with the desired spacing between the transverse parts and that the transverse parts are correspondingly formed with protruding end portions or tabs which can be inserted into these holes and thereby be attached to the side shells appropriately.

25 Ved den relevante kendte fremstillingsteknik er der tale om en i hovedsagen rent manuel samling af delene og endda også om en ganske besværlig manuel tildannelse af de V-formede tværdele ud fra udstansede pladeemner, i hvert fald når siderne ønskes udformet som fladparaboler, idet denne formning udføres ved presning af materialet mod 30 en formoverflade ved hjælp af en håndført trykrulle. Ganske vist er det tynde materiale let at bøje, men tværdelene skal fremstilles i store styktal, og det vil generelt være ønskeligt at automatisere i det mindste denne del af processen.25 The relevant prior art technique involves a substantially purely manual assembly of the parts and even a rather cumbersome manual formation of the V-shaped transverse parts from punched plate blanks, at least when the sides are desired to be designed as flat parabolas, since molding is performed by pressing the material against a mold surface by means of a hand-held printing roller. Admittedly, the thin material is easy to bend, but the cross sections must be made in large numbers and it will generally be desirable to automate at least this part of the process.

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Opfindelsen har imidlertid til formål at angive en fremgangsmåde og et anlæg til fuldautomatisk fremstilling af de omhandlede genstande som helhed. Umiddelbart kan det undre, at dette ikke forlængst er realiseret, men en årsag kan være, at man netop ved den manuelle 5 håndtering har haft mulighed for under samlearbejdet at udføre individuelle tilpasninger ved optrædende høje tolerancekrav. Tyndplade- ' delene skal håndteres skånsomt, og ved de mange fligsamlinger kan man let ved successiv indmontering af tværdelene relativt let bringe fligene på plads ud for modtageslidserne, hvilket blot vil være 10 vanskeligt at imitere maskinelt. Imidlertid kan der dårligt slækkes på tolerancekravene, som er nødvendige for at slutresultatet kan blive en mekanisk stabil struktur.The object of the invention, however, is to provide a method and a plant for fully automatic production of the objects in question as a whole. It is immediately surprising that this has not been realized long ago, but one reason may be that it was precisely during the manual handling that it was possible during individual work to make individual adjustments to high tolerance requirements. The thin-plate parts must be handled gently, and in the many tab assemblies, the tabs can be brought relatively easily out of the receiving slots by successive mounting of the transverse parts, which will simply be difficult to imitate mechanically. However, the tolerance requirements that are necessary for the end result to become a mechanically stable structure can be poorly relaxed.

Ikke mindst når de nævnte tværdele tildannes manuelt vil der uundgåeligt optræde toleranceafvigelser, som ved den fordrede høje grad 15 af nøjagtighed netop er egnede til at udlignes ved en manuel indsats af en trænet operatør.Particularly when the said cross-sections are formed manually, tolerance deviations will inevitably occur which, at the required high degree of accuracy, are precisely suitable to be offset by the manual effort of a trained operator.

En mulig automatisering kunne altså være baseret på en automatisk afføling af toleranceafvigelserne og en tilhørende indstyring af de pågældende dele, men en sådan imitering af den manuelle metode vil 20 være særdeles kompliceret.Thus, a possible automation could be based on an automatic sensing of the tolerance deviations and an associated control of the parts concerned, but such imitation of the manual method would be extremely complicated.

Ved opfindelsen er man i stedet gået den vej, at fremstillingen baseres på en høj grad af nøjagtighed i tildannelsen og placeringen af de elementer, der skal samles, således at samlingen kan udføres, uden at der er behov for nogen form for korrektioner. Dette hensyn 25 strækker sig så vidt, at der må være tale om en automatiseret fremstilling af tværdelene, ved hvilken disse fremstilles nøjagtigt ens, ligesom det må sikres, at disse dele derefter kan placeres nøjagtigt i forhold til de langsgående pladedele, hvortil de skal forbindes.The invention has instead gone the way that the manufacture is based on a high degree of accuracy in the formation and placement of the elements to be assembled so that the assembly can be carried out without any need for any corrections. This consideration 25 extends to the fact that it must be an automated manufacture of the transverse parts in which they are made exactly the same, and it must be ensured that these parts can then be positioned precisely in relation to the longitudinal plate parts to which they are to be connected. .

For undgåelse af det manuelle arbejde bør fremstillingen af tværdele-30 ne foregå synkroniseret eller koordineret med tilbringningen af de langsgående pladedele.In order to avoid the manual work, the production of the transverse parts should be synchronized or coordinated with the arrangement of the longitudinal plate parts.

Det er således for opfindelsen grundlæggende, at de tværgående plade-profildele tildannes ved en automatisk udstansnings- og formningsproces og i umiddelbar tilslutning dertil overføres successivt til en 3Thus, it is fundamental for the invention that the transverse plate profile parts are formed by an automatic die-cutting and molding process and, in immediate connection thereto, are successively transferred to a

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oplægningsindretning i hvilken tværdelene arrangeres i en tværstillet række med nøjagtig indbyrdes placering, hvorefter der til denne række fremføres modstående langstrakte pladestykker med forud tildannede optageslidser for fra enderne af tværdelene lige udstående låseflige, 5 idet disse pladestykker derefter indføres mod enderne af tværdelene under optagelse af disse låseflige i optageslidserne, hvorefter låsefligene udbøjes ved hjælp af automatisk virkende udbøjningsværk-tøjer, som kan arbejde passende skånsomt.mounting device in which the transverse parts are arranged in a transverse row with precisely spaced position, after which opposite elongated plate pieces with pre-formed recording slots are provided for locking tabs protruding from the ends of the transverse parts, these plates being then inserted against the ends of these transverse parts during recording locking tabs in the recording slots, after which the locking tabs are deflected by means of automatically acting deflection tools, which can work appropriately gently.

Tværdelene er relativt små og stive enheder, der rimeligt let kan 10 håndteres skånsomt i og med at de blot behøver at blive arrangeret i en række med nøjagtig indbyrdes afstand, hvorefter de på nærmest passiv måde kan bringes i indgreb med de langstrakte pladestykker, når disse skubbes ind mod enderne af tværdelene. Det er dog her et væsentligt træk ved opfindelsen, at fligene kan optages i ganske 15 brede slidser, endda med tværdelene i let sammentrykket tilstand, hvorved et følgende nøjagtigt indgreb kan opnås mellem fligene og de respektive ender af hver slidse uden at tolerancekravene ved indføringen af fligene er særligt store. Det er særligt vigtigt at håndtere de langstrakte tyndpladestykker på fornøden skånsom måde, da 20 disse stykker navnlig netop i forbindelse med reflektorer let deformeres på mærkbar måde ved selv den mindste lokale over- eller forskelsbelastning.The transverse members are relatively small and rigid units which can reasonably easily be handled delicately in that they simply need to be arranged in a series of precisely spaced parts, after which they can be engaged in an almost passive manner with the elongated sheet pieces when these pushed in towards the ends of the cross members. However, it is an essential feature of the invention that the tabs can be accommodated in quite 15 wide slots, even with the transverse parts in a slightly compressed state, whereby a subsequent precise engagement between the tabs and the respective ends of each slot can be achieved without the tolerance requirements of the introduction of the tabs. the tabs are particularly large. It is particularly important to handle the elongated thin-plate pieces in a gentle manner, as especially in connection with reflectors, these pieces are easily deformed noticeably at even the smallest local over- or differential load.

Ved opfindelsen foretrækkes det, at de langstrakte sidepladestykker forud, omend fortrinsvis i et integreret maskinafsnit, tildannes med 25 den ønskede profil og den ønskede længde ud fra et oprullet plade-strimmelmateriale, og at disse pladestykker, som også tildannes med de nødvendige modtageslidser for tværdelenes låseflige, automatisk eller manuelt overføres til sammenpakning i to lagre for henholdsvis den ene og den anden sideplade i reflektorstrukturen, og at der gøres 30 brug af midler til successiv afhentning af disse pladestykker fra de to lagre og til positionering af pladestykkerne ud for rækken af tværdelene med den fornødne nøjagtighed, såvel som til en påfølgende indføring af pladestykkerne mod enderne af tværdelene. Ved udviklingen af opfindelsen er frembragt og afprøvet adskillige forskellige 35 overføringsindretninger, og det har vist sig, at en enkelt af disse er langt at foretrække, nemlig en gribning, overføring og indtrykning 4In the invention, it is preferred that the elongated side plate pieces are formed, albeit preferably in an integrated machine section, with the desired profile and length from a rolled plate strip material, and that these plate pieces, which are also formed with the necessary receiving slots for the transverse parts. locking tabs, automatically or manually transferred to pack in two layers for one and the other side plate of the reflector structure, respectively, and use is made of means for successively picking up these plate pieces from the two layers and for positioning the plate pieces off the row of the cross members. with the required accuracy, as well as for a subsequent insertion of the plate pieces toward the ends of the cross members. In the development of the invention, several different transfer devices have been produced and tested, and it has been found that a single one of them is far preferable, namely a gripping, transfer and impression 4.

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af pladestykkerne ved hjælp af en bevægemekanisme, som fastholder emnerne ved hjælp af en række sugekopper, der enten kan holde pladerne i fast anlæg mod en bevæget bæredel eller ved en forholdsvis tæt indbyrdes anbringelse, kan være velegnede til både at fastholde 5 emnerne ved en bevægelse bort fra magasinlagrene og at virke som passende eftergivende trykelementer ved den efterfølgende indtrykning af emnerne mod enderne af tværdelene.of the plate pieces by means of a movement mechanism which holds the articles by means of a series of suction cups, which can either hold the plates in a fixed position against a moving support part or by a relatively close mutual arrangement, may be suitable for both holding the articles by a movement. away from the magazine bearings and to act as suitably resilient pressure members in the subsequent pressing of the blanks toward the ends of the cross members.

Hvad angår udbøjningen af låsefligene på enderne af tværdelene skal det her kun bemærkes, at denne udbøjning bedst sker ved hjælp af 10 værktøjsdele, som bevæges til direkte sidebøjning af fligene hellere end af værktøjer, som fremkalder en udbøj ning ved blot at indtrykkes aksialt imod fligene for udbøjning af disse ved en tilhørende tvær-rettet kraftkomposant. Det er dog hensigtsmæssigt, at den sidste del af udfligningen udføres ved et direkte indadgående tryk.Regarding the bending of the locking tabs on the ends of the transverse parts, it should be noted here that this bending is best done by means of 10 tool parts which are moved to direct lateral bending of the tabs rather than by tools which induce a bend by simply pressing axially against the tabs. for deflection thereof by an associated transverse force component. However, it is convenient that the latter part of the joint is performed at a direct inward pressure.

15 Opfindelsen forklares i det følgende nærmere under henvisning til tegningen, på hvilken fig. 1 er et skematisk perspektivbillede til illustration af den grundlæggende samling af delene ved en fremgangsmåde ifølge opfindelsen, 20 fig. 2 er en detalje· af en del af fig. 1, fig. 3 et udsnitsbillede af et emne under fremstilling, fig. 4 og 5 billeder til illustration af en udfligningsoperation, fig. 6 et perspektivbillede af diverse værktøjer, fig. 7 og 8 henholdsvis et endebillede og et sidebillede af emnet, og 25 fig. 9 et perspektivbillede deraf.The invention will now be explained in more detail with reference to the drawing, in which: 1 is a schematic perspective view illustrating the basic assembly of the parts by a method according to the invention; FIG. 2 is a detail of a portion of FIG. 1, FIG. 3 is a sectional view of a workpiece being made; FIG. Figures 4 and 5 illustrate a flushing operation; 6 is a perspective view of various tools; FIG. 7 and 8 show an end view and a side view respectively of the workpiece; 9 is a perspective view thereof.

For fremstilling af en lysrørreflektor som vist i fig. 9, der består af to modstående aflange sideplader 2 og mellem disse anbragte tværdele 4, udføres en separat fremstilling af disse dele, og nederst i fig. 1 er vist en foretrukket fremstillingsmåde for tværdelene 4.To produce a fluorescent reflector as shown in FIG. 9, consisting of two opposite elongated side plates 2 and between these transverse parts 4, a separate manufacture of these parts is carried out, and at the bottom of FIG. 1, there is shown a preferred method of manufacture for the cross members 4.

30 Disse tildannes ud fra en pladestrimmel 6, som fra en ikke vist forrådsrulle føres til et stanseapparat 8, hvori der løbende udstanses emner 10 til dannelse af tværdelene. Disse emner føres af ikke viste transportorganer til et prægeapparat 12 tildannet med de viste "mågevinge"formede presseflader, som deformerer emnerne 10 tilsvaren 5These are formed from a sheet strip 6 which is fed from a stock roll not shown to a punching apparatus 8, in which blanks 10 are continuously punched to form the cross members. These blanks are guided by conveying means (not shown) to an embossing apparatus 12 formed with the shown "gull-wing" shaped pressing surfaces which deform the blanks 10 corresponding to 5

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de, idet overparten af dette værktøj er af hårdt materiale med meget nøjagtigt tildannede formeflader, medens underparten er af halvblødt materiale. Derefter aflægges de formpressede emner ovenpå en for-meblok 14 tildannet med en i hovedsagen V-formet midtersænkning 16, 5 hvori emnerne nedpresses ved hjælp af et trykværktøj 18 for bukning til den ønskede slutform af tværdelene. Også her består underparten 14 af halvblødt materiale, hvorved ydersiden af emnerne skånes ved den tilhørende glidning af ydersiden langs de øvre kantområder af sænkningen 16. Blokken 14 behøver dog ikke at have forsænkningen 16, 10 da den ønskede opbøjning af emnet kan udføres ved nedtrykning af værktøjet 18 mod en plan overside af den halvbløde blok, hvorved opbøjningen fremkommer ved en ganske kort nedtrykning; herved skånes de ydre sideflader af emnet mod skrabning. Allerede i stanseapparatet 8 eller fortrinsvis i prægeapparatet 12 er emnernes modstående kant-15 dele langs kortsiderne udbukket til vinkelflige 20, der i den færdige tværdel 4 er indadragende i et fælles, øvre vandret plan. Disse vinkelflige er dog ikke ubetinget nødvendige.they, the upper part of this tool being of hard material with very precisely formed mold surfaces, while the lower part being of semi-soft material. Then, the molded articles are deposited on top of a mold block 14 formed with a generally V-shaped center depression 16, 5 in which the articles are pressed down by means of a pressure tool 18 for bending to the desired final shape of the cross members. Here, too, the lower part 14 consists of semi-soft material, whereby the outer surface of the blanks is spared by the associated sliding of the outer surface along the upper edge areas of the depression 16. However, the block 14 need not have the recess 16, 10, since the desired bending of the workpiece can be carried out by depressing the workpiece. the tool 18 against a flat top of the semi-soft block, whereby the deflection appears by a very short depression; This protects the outer side surfaces of the work from scratching. Already in the punching apparatus 8 or preferably in the embossing apparatus 12, the opposing edge portions of the blanks along the short sides are bent to angular tabs 20 which in the finished cross-section 4 are projecting inwardly into a common upper horizontal plane. However, these angular tabs are not necessarily necessary.

De således færdiggjorte tværdele fremføres successivt fra formeblok-ken 14 til en V-formet modtagereces 22 i en tværgående skabelonstang 20 eller -kæde 24, der bevæges skridtvis mod venstre, således at en lang stang- eller kædelængde efterhånden fyldes op med tværdele 4 i recesserne 22, nemlig over en længde svarende i hvert fald til længden af de sideplader 2, som skal benyttes. Som vist i fig. 2 indføres tværdelene 4 i recesserne 22 til en hængende stilling deri, således at 25 der er plads til, at tværdelene kan nedtrykkes en smule for at opnå en totalt stabiliseret optagelse i recesserne.The thus-completed cross-sections are advanced successively from the mold block 14 to a V-shaped receiver recess 22 in a transverse template rod 20 or chain 24, which is moved stepwise to the left, so that a long rod or chain length is gradually filled with cross sections 4 in the recesses. 22, namely over a length corresponding at least to the length of the side plates 2 to be used. As shown in FIG. 2, the transverse parts 4 are inserted into the recesses 22 to a hanging position therein, so that there is room for the transverse parts to be slightly depressed to achieve a total stabilized uptake into the recesses.

Sidepladerne 2, som har et let buet tværsnit, fremstilles ved prægedeformering eller valsning af et båndmateriale, hvilket udmærket kan foregå i samme maskinopbygning som den, hvori tværdelene 4 fremstil-30 les, uden dog at være begrænset dertil. Sidepladerne forsynes med udstansede slidser 26 og 28 til modtagelse af udragende låseflige 30 og 32 henholdsvis foroven og forneden på sidekanterne af tværdelene 4. Uanset hvor eller hvordan sidepladerne er fremstillet anbringes de i to magasiner 34 på hver sin side af stangen eller kæden 24 (kun det 35 ene magasin er vist), idet sidepladerne 2 her anbringes i en pakkestabel ophængt på bærestænger 35 og/eller understøttet på bære- og 6The side plates 2, which have a slightly curved cross-section, are made by embossing or rolling a strip material, which can very well take place in the same machine structure as the one in which the cross sections 4 are made, without being limited thereto. The side plates are provided with punched slots 26 and 28 for receiving protruding locking tabs 30 and 32 respectively at the top and bottom of the side edges of the transverse parts 4. Wherever or how the side plates are manufactured, they are placed in two magazines 34 on either side of the rod or chain 24 (only the 35 one magazine is shown), wherein the side plates 2 are placed here in a package stack suspended on carrier rods 35 and / or supported on carrier and 6

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støtteflader på en sådan måde, at sidepladerne er ret nøjagtigt positioneret i forhold til det maskinstativ, hvor tværstangen eller -kæden 24 er lejret, hvilket gælder både i højderetningen og i længderetningen, men ikke nødvendigvis i stablingsretningen. Bærepindene 5 35 samvirker med huller 37 i pladerne 2, hvilke huller er beregnet til brug ved den senere montering af reflektoren i et lysrørsarmatur.supporting surfaces in such a way that the side plates are positioned fairly accurately with respect to the machine frame where the cross bar or chain 24 is mounted, which applies both in the vertical and longitudinal directions, but not necessarily in the stacking direction. The supporting pins 5 35 interact with holes 37 in the plates 2, which holes are intended for use in the later mounting of the reflector in a fluorescent lamp fixture.

Til overførsel af de respektive forreste sideplader 2 i hver af disse stabelpakker til en stilling langs siden af stangen eller kæden 24 benyttes en bjælke 36, som er forsynet med fremstående rørstykker 38, 10 som yderst er forsynet med en sugekop 40. Bjælken 36 er forbundet med en ikke vist bevægemekanisme, ved hvis hjælp bjælken kan føres indad mod forsiden af stabelpakken ved en bevægelsesretning nøjagtigt sammenfaldende med stablingsretningen, således at sugekopperne 40 kan gribe den forreste sideplade 2 i stabelen med en nøjagtig indbyrdes 15 positionering uanset om denne gribning forekommer ved en stor eller lille tykkelse af stabelen. Bevægemekanismen er indrettet til derefter at føre bjælken 36 til en tilsvarende nøjagtig position ud for siden af stangen eller kæden 24, således at slidserne 26,28 i sidepladen 2 vil være beliggende udenfor de udragende flige 30,32 på de i 20 stangen eller kæden 24 lejrede tværstykker 4.For transferring the respective front side plates 2 of each of these stack packages to a position along the side of the rod or chain 24, a beam 36 is provided which is provided with protruding pipe pieces 38, 10 which are provided with a suction cup 40. The beam 36 is connected with a movement mechanism not shown, by means of which the beam can be guided inwards towards the front of the stack package in a direction of movement exactly coinciding with the stacking direction, so that the suction cups 40 can engage the front side plate 2 in the stack with an exact mutual positioning, regardless of whether this gripping occurs in a large or small thickness of the stack. The moving mechanism is then arranged to guide the beam 36 to a correspondingly exact position next to the rod or chain 24, so that the slots 26,28 in the side plate 2 will be located outside the protruding tabs 30, 32 of the 20 or chain 24 members. alloyed cross sections 4.

Slidserne 26 og 28 i pladerne 2 er ikke smalle slidser til lokal optagelse af de respektive flige 30 og 32, men brede slidser, der ved de modstående ender kan optage henholdsvis begge fligene 30 og begge fligene 32, idet det herved tilstræbes, at de modstående flige kan 25 udbukkes bort fra hinanden over de modstående endekanter af slidserne.The slots 26 and 28 of the plates 2 are not narrow slots for local uptake of the respective tabs 30 and 32, but wide slots which can receive at the opposite ends respectively both tabs 30 and both tabs 32, with the aim being that tabs can be bent apart over the opposite end edges of the slots.

For en sikker indføring af pladerne 2 mod sidekanterne af tvær del ene 4 er det væsentligt, at denne indføring kan foregå uden at fligene 30,32 kolliderer med pladen 2 udenfor slidserne 26 og 28, medens det 30 også er ønskeligt, at fligene ligger tæt ind mod endekanterne af slidserne. Dette toleranceproblem er ved opfindelsen løst ved, at man før den videre indbringning af pladedelene 2 imod sidekanterne af tværdelene udvirker en nedtrykning af tværdelene i recesserne 22 ved hjælp af en ikke vist, overliggende trykbjælke, idet en sådan ned-35 trykning (jfr. fig. 2) vil resultere i, at de V-formede tværstykker 4For a secure insertion of the plates 2 against the side edges of the transverse parts 4, it is essential that this insertion can take place without the tabs 30,32 colliding with the plate 2 outside the slots 26 and 28, while it is also desirable that the tabs be close towards the end edges of the slots. This problem of tolerance is solved by the invention in that, before the further insertion of the plate parts 2 against the lateral edges of the transverse parts, a depression of the transverse parts in the recesses 22 is effected by means of an overpressure bar not shown, cf. 2) will result in the V-shaped cross sections 4

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7 foroven vil sammentrykkes elastisk til mindskelse af afstanden mellem de modstående flige 30 og 32 i disse respektive par af flige. Som vist i fig. 3 kan fligene herved indføres nogenlunde frit i slidserne 26,28, omend der navnlig forneden ikke er megen plads. Til gengæld er 5 tværdelene 4 her fastholdt nøjagtigt ved nedtrykningen mod den nedre ende af V-recesserne 22 i stangen/kæden 24, således at emnerne er sikkert positioneret.7 above will be resiliently compressed to reduce the distance between the opposing tabs 30 and 32 in these respective pairs of tabs. As shown in FIG. 3, the tabs can hereby be introduced fairly freely in the slots 26,28, although there is not much room in particular below. In contrast, the 5 transverse members 4 are here precisely retained by the depression toward the lower end of the V-recesses 22 of the rod / chain 24 so that the blanks are securely positioned.

Efter denne indføring af sidepladerne 2 over fligene 30,32 sørges der for, at stangen/kæden 24 sænkes en smule, henholdsvis at bjælkerne 36 10 med det mellemliggende, foreløbigt samlede emne løftes .en smule, således at tværdelene 4 hæves fra recesserne 22 og derved får lejlighed til at udvide sig med det resultat, at fligene 30 og 32 vandrer ud mod eller ud til de respektive endeflader af slidserne 26,28.After this insertion of the side plates 2 over the tabs 30,32, it is ensured that the bar / chain 24 is lowered slightly, respectively, that the beams 36 10 with the intermediate, provisionally assembled workpiece are lifted slightly, so that the cross sections 4 are raised from the recesses 22 and thereby giving the opportunity to expand with the result that the tabs 30 and 32 migrate towards or out to the respective end faces of the slots 26,28.

Naturligvis skal også den nævnte overliggende trykbjælke løftes, 15 eller tilsvarende relative bevægelser kan etableres på andre måder:Of course, the above-mentioned pressure bar must also be lifted, or similar relative movements can be established in other ways:

Derefter indføres ud for de respektive par af flige et bearbejdnings-værktøj 42 som vist i fig. 4 og 5. Værktøjets forflade 44 er buet svarende helt eller nogenlunde til tværsnittet af sidepladen 2, og fra denne flade udgår et par fremstående, tilspidsende bukkenæser 46 20 og 48 anbragt oven over hinanden for samvirke med fligparrene henholdsvis 30 og 32. Værktøjet indføres til den i fig. 5 viste stilling A, hvorefter det bevæges sideværts først udad forbi den ene flig 30 for delvis udbøjning af denne ved passagen af bukkenæsen 46 og derefter tilbage og ud til den anden side får modsvarende udbukning af 25 den anden flig 30. Som vist vil begge fligene således være skråt udbukket om endekanterne af den tilhørende slidse 26, når bukkenæsen når til den viste stilling B. Derfra føres værktøjet tilbage til stilling A, hvorefter det aktiveres til indskydning imod sidepladen 2. Derved trykker forfladen 44 ind mod de skråt udbukkede flige og 30 trykker den helt ind mod pladen 2, dvs. til fuld udbukning af fligene.Next, a machining tool 42 is shown next to the respective pairs of tabs as shown in FIG. 4 and 5. The front face 44 of the tool is curved corresponding completely or roughly to the cross-section of the side plate 2, and from this face a pair of prominent tapered abdominal noses 46 20 and 48 are placed one above the other for co-operation with the pair of lugs 30 and 32 respectively. FIG. 5, after which it is laterally moved outwardly past one tab 30 for partial deflection thereof at the passage of the abdominal nose 46 and then back and out to the other side correspondingly deflection of the other tab 30. As shown, both tabs will thus being inclined about the end edges of the associated slot 26 when the buck nose reaches the position B. From there, the tool is returned to position A, and then activated for insertion against the side plate 2. The front surface 44 pushes against the inclined bulges and 30 pushing it all the way into plate 2, ie. for full folding of the tabs.

Derefter vil emnet være færdigt, dvs. det skal blot løsgøres fra holdeværktøjerne på egnet måde.Then the subject will be finished, ie. it just needs to be detached from the holding tools in a suitable way.

88

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Det er i fig. 6 og 7 illustreret, at der normalt vil være plads til både en værktøjsbjælke 50, som bærer værktøjerne 42, og bærebjælken 36, der her bærer holdehoveder 35 med sugekopper 40 ved en ydre anlægsflade for sidepladen 2. Nederst på dette hoved 37 er anbragt en 5 spids, kort udragende tap 52, som ved aktiveringen indføres i et af de allerede omtalte huller 37 i pladen 2 og derved låser denne mod bevægelser i pladens eget plan. Der opnås herved både en nøjagtig positionering af pladerne og en effektiv fastholdelse af disse under udfligningen med værktøjerne 42.It is shown in FIG. 6 and 7 illustrate that there will normally be space for both a tool bar 50 carrying the tools 42 and the carrier 36 carrying here holding heads 35 with suction cups 40 at an outer abutment surface for the side plate 2. At the bottom of this head 37 is placed a 5 pointed, short protruding tab 52 which, upon activation, is inserted into one of the holes 37 already mentioned in the plate 2, thereby locking it against movements in the plate's own plane. Thereby, both accurate positioning of the plates and effective retention thereof are obtained during the alignment with the tools 42.

10 Det kan være tilstrækkeligt med blot nogle få holdehoveder 35 anbragt langs hele længden af bærebjælken 36. Der kan yderligere være anbragt nogle længere nedragende støtteblokke 33, som evt. kan være integreret med holdehovederne 35 udenfor arbejdsområdet for udfligeværk-tøjeme 42.It may be sufficient to have just a few holding heads 35 disposed along the entire length of the support beam 36. Further, some longer projecting support blocks 33 may be provided, as may be seen. may be integrated with the holding heads 35 outside the working area of the reclining tools 42.

15 Ved enderne af reflektoren kan det være ønskeligt at afslutte med den relevante indadvendende halvdel af et tværstykke 4. En sådan halvdel er ved 4' i fig. 8 og 9 vist oplagt ved den højre ende af den række tværdele, som er klar til modtagelse af sidepladerne 2. Emnet er tildannet ved overstansning af et ordinært emne 10,4, således at det 20 halve tværstykke nederst har en udadragende ombøjning 54, fig. 8. I enden af sidepladerne 2 er tildannet den ene halvdel af de ordinære slidser 26 og 28, idet der et stykke indenfor kanten er udskåret indhak 56 i slidsernes langsgående kanter, således at der udenfor disse indhak efterlades fligdele 58 af pladematerialet. De halve 25 tværdele kan ved den beskrevne fremgangsmåde oplægges og bringes på plads ganske som de øvrige tværdele, og problemet vil blot være, at der vil mangle det modhold, som ellers opnås ved forekomsten af den modstående halvdel af tværstykket, dvs. den monterede halvdel vil ikke være stabiliseret mod en udadgående frigørelse fra sit indgreb 30 med pladerne 2. Det er dog dette, som tilgodeses ved hjælp af fligdelene 58, idet disse kan trykkes indad til dannelse af en spærring ved den ydre side af tværdelen 4'.At the ends of the reflector it may be desirable to terminate with the relevant inward half of a cross section 4. Such half is at 4 'in FIG. 8 and 9 are shown at the right end of the series of transverse parts ready to receive the side plates 2. The blank is formed by punching an ordinary blank 10,4 so that the 20 half cross piece at the bottom has an outwardly projecting bend 54, FIG. . 8. At one end of the side plates 2, one half of the ordinary slots 26 and 28 are formed, with a piece within the edge being cut notch 56 at the longitudinal edges of the slots, leaving outside portions 58 of the sheet material. The half 25 transverse parts can be laid up and put in place by the described method, just like the other transverse parts, and the problem will simply be that the restraint that is otherwise obtained by the presence of the opposite half of the transverse part, ie. the mounted half will not be stabilized against an outward release from its engagement 30 with the plates 2. It is, however, this which is accommodated by the tab members 58 as they can be pressed inwardly to form a barrier at the outer side of the cross section 4 ' .

Denne indtrykning udøves automatisk ved den allerede omtalte ind-trykning af udfligningsværktøjerne 42, idet disses bukkenæser 46 og 35 48 (fig. 4 og 6) er tildannet med i lodret retning fortykkede grund- 9This impression is exerted automatically by the pressing of the equalizing tools 42 already mentioned, with their abdominal noses 46 and 35 48 (Figures 4 and 6) being formed with a vertically thickened base 9.

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dele 49, som ved indtrykningen netop vil ramme mod fligdelene 58 og indbøje disse til spærrestillinger udenfor elementet 4'.portions 49 which, upon indentation, will precisely strike against the tab portions 58 and bend them into locking positions outside the element 4 '.

Det er således kun ved de to ender af reflektoren, der er behov for at benytte værktøjer 42 med de pågældende grunddele 49, men det er 5 dog fundet hensigtsmæssigt at standardisere værktøjerne i så henseende, bl.a. fordi der så er større frihed til fremstilling af reflektorer med forskellige længder og i forskellige monteringspositioner på stangen eller kæden 24. Dette betyder så til gengæld, at grunddelene 49 over hele strækningen vil søge at indtrykke pladema-10 terialet ved hvert bearbejdningssted, hvilket vil være direkte uønsket. Af denne grund er samtlige slidser 26 og 28 netop med undtagelse af de alleryderste tildannet med tilstødende åbninger 29, som fint optager grunddelene 49 ved indtrykningen af værktøjerne 42.Thus, it is only at the two ends of the reflector that tools 42 are used with the respective base parts 49, however, it has been found appropriate to standardize the tools in this regard, i. because there is then greater freedom to produce reflectors of different lengths and in different mounting positions on the rod or chain 24. This, in turn, means that the base members 49 throughout the section will seek to press the sheet material at each machining site, which will be directly unwanted. For this reason, all of the slots 26 and 28, with the exception of the very outermost ones, are formed with adjacent apertures 29 which finely occupy the base parts 49 when the tools 42 are pressed.

Det er af stor betydning, at tværstykkerne 4 samles med pladedelene 2 15 med et tæt og nøjagtigt kantanlæg mod disse både af hensyn til strukturen, men også i høj grad for at sikre, at der ikke dannes synlige "sorte striber" indvendigt i reflektoren; da dennes overfladedele er blanke vil en spalte mellem ikke-tætsluttende dele ytre sig visuelt som en sort streg, der er uønsket. Det er ved opfindelsen opnået, at 20 der automatisk og meget hurtigt kan frembringes ganske tætte samlinger, ligesom delene håndteres på en sådan måde, at overfladerne skånes mod rivninger, der kunne forstyrre blankheden.It is of great importance that the cross pieces 4 are joined with the plate parts 2 15 with a dense and accurate edge against them both for the sake of structure, but also to a great extent to ensure that no visible "black stripes" are formed inside the reflector; as its surface parts are glossy, a gap between non-sealing parts will appear visually like a black line that is undesirable. It has been achieved by the invention that very close assemblies can be produced very quickly and very quickly, as well as the parts are handled in such a way that the surfaces are spared from tearing that could disturb the blankness.

Ved brug af den i fig. 8 viste endeafslutning skal der naturligvis drages omsorg for, at emnerne 4 undergår den nødvendige modifikation 25 af en ekstra værktøjssektion, ligesom udstansningerne af slidserne i pladedelene 2 skal afpasses ved manglende fjernelse af fligområderne 56. Alt dette volder ingen principielle vanskeligheder, og de tilhørende midler kan let indgå i et automatisk styresystem, som kan dirigere de forskellige operationer ud fra indtastede ordredata 30 m.h.t. antal og længder af de ønskede emner. Der vil endog automatisk kunne omskiftes mellem forskellige værktøjsbaner til fremstilling af henholdsvis pladedelene 2 og tværstykkerne 4 , såvel som mellem forskellige holdestænger eller -kæder 24 af forskellige sæt af bære-bjælker 36 og udfligningsbjælker 50. således at der kan omstilles 35 mellem forskellige typer eller størrelser af emnerUsing the device shown in FIG. 8, of course, the workpieces 4 must undergo the necessary modification 25 of an additional tool section, and the cut-outs of the slots in the plate parts 2 must be adjusted in the absence of removal of the tab areas 56. All this does not cause any fundamental difficulties and the associated means. can easily be included in an automatic control system, which can direct the various operations based on entered order data 30 mt. number and lengths of the desired items. It will even be possible to switch automatically between different tool paths to produce the plate parts 2 and the cross pieces 4, respectively, as well as between different holding bars or chains 24 of different sets of support beams 36 and reclining beams 50. so that 35 can be switched between different types or sizes of items

Claims

A method of producing thin plate blanks such as reflectors for fluorescent lamps consisting of two elongated side plates (2) and a plurality of interposed parts (4) in the form of V-bending plate blanks (4) with tabs (30, 32) projecting at the ends. is passed through slots (26, 28) in the side plates and is extended to assemble the parts, characterized in that the transverse parts (4) are successively formed by punching, pressing and bending and fed to an elongated holding template (24) in which they are placed in a row having a mutual position corresponding to their mutual end positions, and the side plates (2) being gripped from a magazine and being guided to a position beyond the ends of the transverse parts (4) by means of a holding beam (36) holding the side plates by suction action against correspondingly profiled supporting surface parts (35) of the retaining beam, after which the side plate (2) of the retaining beam (36) is pushed into the ends of all the transverse parts 11 simultaneously with another side plate (2) is similarly inserted towards the opposite ends of the transverse members, being held slightly elasticly clamped to temporarily reduce the distance between their opposite end flaps (30 and 32), which tabs at the insertion pass through wider slots (26, 28) in the plates and after insertion, are directed towards the end edges of these slots, extending the slightly clamped cross members and then further in the same direction to bend the respective tabs (30, 32) around the end edges of the slots.

Method according to claim 1, characterized in that the side plates (2) during the insertion and the subsequent deflection effect on the tabs (30, 32) are maintained centered on the retaining beam (36) by means of this protruding pin (52) extending through narrowly fitting holes (37) in side plates 15.

Method according to claim 1, characterized in that the deflection of the tabs (30, 32) is effected by means of reciprocating tools (42) with protruding nose portions (46, 48), which from a position between the facing 20 tabs are first guided in one direction to partially fold down one tab and then in the opposite direction to partially fold down the opposite tab, after which the nose portion (46, 48. is returned to the initial position between the tabs and tool (42) pushed into the side plate (2) for folding and pressing 25 of the tabs against it with the nose portion projecting through the free space in the plate slot (26, 28, 29) between the tabs.

Method according to claim 1, characterized in that the cross-sections (4) are formed successively from an applied plate band material (6) in a processing unit (8, 12, 30 14), from which the finished pieces are immediately transferred to said holding template (24). or another receiving or transmitting unit which is moved past a delivery end of the processing station for successively receiving the objects (4) at a distance from one another. 12 DK 161346 B

Method according to claim 1, characterized in that the transverse parts (4) are slightly compressed prior to the application of the side plates (2) by being pressed into V-shaped holder recesses (22) in the holding template (24) by means of a continuous, overhead pressure bar.

Method according to claim 1, characterized in that the transverse parts (4) are subjected to a molding by means of a die (18) against an abutment block (14) of semi-soft material.

Method according to claim 1, characterized in that the side plates (2) are joined at the ends with respective half-parts (41) of said transverse parts (4), for the outwardly retaining of these half-parts, a bending of flap parts (58) of the side plates is made evenly. outside the transverse parts (4).

An apparatus for carrying out the method according to any one of claims 1-7 and for the manufacture of thin plate blanks such as reflectors for fluorescent luminaires consisting of two elongated side plates (2) and a plurality of interposed parts in the form of V-bending plate blanks (4). with tabs (30, 32) projecting at the ends, which pass through 20 slots (26, 28) in the side plates and extend to the assembly of the parts, characterized in that the system has means for successively forming the cross-sections (4) by punching, pressing and bending and feeding said cross members (4) to an elongated holding template (24), wherein they are arranged in a row at a mutual position 25 corresponding to their mutual end positions, and said apparatus has means adapted to engage said side plates (2) from a magazine, for guiding the side plates (2) to a position outside the ends of the transverse parts (4) by means of a retaining beam (36) which holds the side plates in suction action against corresponding profile rods e supporting surface parts (35) of the holding beam, and for inserting the side plate (2) of the holding beam (36) towards the ends of all the cross members at the same time as another side plate (2) is similarly inserted against the opposite ends of the cross members, the latter means of the plant is arranged to hold the cross members slightly elasticly clamped to temporarily reduce the distance 35 between their opposite end flaps (30 and 32), which tabs are inserted at the insertion through wider slots (26, 28) and thereafter the insertion to actuate said tabs towards the end edges of these slots, extending the slightly clamped transverse portions and then further in the same direction to bend the respective tabs around the end edges of the slots.

System according to claim 8, characterized in that the latter means of the system are arranged to retain the side plates (2) centered on the retaining beam (36) by means of this projecting pin (36) during insertion and the subsequent bending influence on the tabs. 52) extending through narrowly fitting holes (37) in the side plates.

System according to claim 8, characterized in that the system has reciprocating tools (42) with protruding nose portions (46, 48) arranged for deflection of the tabs (30, 32), which reciprocating tools ( 42) with protruding nose portions (46, 48) arranged to be guided from a position between the opposite tabs first in one direction to partially unfold the one tab and then in the opposite direction to partially unfold the opposite tab. , Then to be returned to the initial position between the tabs and to be pushed into the side plate (2) for folding and pressing the tabs against it with the nose portion projecting through the free space in the plate slot (26, 28, 29) between the tabs.

10 DK 161346 B Since, as mentioned, work should be carried out with very high accuracy, it may be advisable to carry out transfer movements at multiple temps, for example by removing the side plates 2 from the magazine 34 by means of a conveyor beam 36 which is used only for transferring. the plates for 5 temporary deposition in an intermediate station in the immediate vicinity of the final mounting location, after which a special gripping beam cf. FIG. 6 grabs the plates in this station and guides them the short distance to the mounting point; Hereby, the positioning of the plates can be precisely adjusted in the intermediate station, so that the required accuracy 10 is ensured when the movement of the gripper beam is accurately controlled, while a correspondingly high accuracy can be waived in the prior handling of the plates. Likewise, the crosspieces can be placed in a only reasonably accurately formed holding rod or chain 24, from which they can then be suitably transferred to a more accurately formed holding device for carrying out the assembly itself. The accuracy requirements must precisely be seen in relation to the movement through several joints, whereby a basic sufficient tolerance must be able to accommodate some accumulated inaccuracies, ie. these should be quite small.

20 PATENT REQUIREMENTS

The plant according to claim 8, 25, characterized in that the first means of the plant comprise a processing unit (8, 12, 14) arranged for successively forming the cross-sections (4) from an applied plate band material (6) and the former of the plant. means are arranged to transfer the finished items immediately to the holding template (24) or another receiving or transfer unit arranged to be moved past a molding member (8, 30, 12, 14) immediately after forming the transverse parts of said processing unit (8, 30, 12, 14). delivery end of the processing station for successive reception of the objects (4) at a distance from one another. DK 161346 B u

Installation according to claim 8, characterized in that the latter means of the system are arranged to compress the transverse parts (4) before the attachment of the side plates (2) by depressing the transverse parts (4) in V-shaped holders (22). holding template (24) by means of a continuous, overlying pressure bar.

Plant according to claim 8, characterized in that the first mentioned means of the plant comprise a die piston (18) and a plant block (14) of semi-soft material 10 for molding the transverse parts (4).

System according to claim 8, characterized in that the system is arranged to connect the respective half-parts (4) of said transverse parts (4) to the respective side plates (2) at the ends of the side plates (2), these half-parts 15 being retained by flexion of the tab parts. (58) of the side plates just outside the transverse parts (4).