DK152100B

DK152100B - CLUTCH FOR DETERMINING A HOLE MATERIAL ON A DRIVING HEAD OF A PELLETING MACHINE

Info

Publication number: DK152100B
Application number: DK57878A
Authority: DK
Inventors: Luigino Romanello
Original assignee: Reffo O Mecc Snc
Priority date: 1977-05-13
Filing date: 1978-02-08
Publication date: 1988-02-01
Also published as: FR2390275B1; FR2390275A1; DE2756647C3; GB1599003A; DK152100C; DE2756647B2; DE2756647A1; DK57878A; IT1082936B

Description

DK 152100 BDK 152100 B

Opfindelsen vedrører en kobling til fastgørelse af en hulmatrice på en pelleteringsmaskines drivhoved, som har en flange med en konisk inderside, der med et ringformet mellemrum omgiver en cylindrisk kantflade 5 på matricen, hvilken kobling har klemsegmenter indbygget i det ringformede mellemrum og udformet med ud-advendende flader, som er komplementære til flangens koniske inderside, akseparallelle trækbolte fastgjort til klemsegmenterne og ragende ud gennem åbninger i 10 flangen, fjedre indspændt mellem flangens bagside og vederlag på de udragende ender af trækboltene, samt en på trækboltene virkende hydraulikmekanisme til udkobling af klemsegmenterne mod fjederkræfterne.BACKGROUND OF THE INVENTION The invention relates to a coupling for attaching a hollow die to the drive head of a pelletizing machine having a flange with a conical inner surface which, at an annular space, surrounds a cylindrical edge surface 5 of the matrix, which coupling has clamping segments built into the annular space and formed with advancing surfaces which are complementary to the conical inside of the flange, axial parallel tension bolts attached to the clamp segments and protruding through openings in the flange, springs clamped between the rear of the flange and recoil at the protruding ends of the pull bolts, and a hydraulic mechanism mechanism acting on the pull bolts to the clamping segments. spring forces.

Fra DE fremlæggelsesskrift nr. 2 108 326 kendes 15 en pelleteringsmaskine med en kobling af den i indledningen angivne art. I denne kendte kobling er der i mellemrummet mellem konusfladen og matricens cylinderflade monteret to sæt udvendig koniske og indvendig cylindriske segmenter, som afveksler i koblingens perife-20 riretning, og hvor det ene sæt segmenter er boltet fast til drivhovedet og tjener til centrering af matricen, medens de mellemliggende bevægelige segmenter udgør klemsegmenter, der via hver sin akseparallelle trækbolt er forbundet med en trykring. Mellem trykrin-25 gen og bagsiden af drivhovedets flange er der monteret gummifjedre, som via ringen og boltene trækker de bevægelige segmenter nedad og derved fastklemmer matricen. Udkoblingen sker ved hjælp af flere hydraulikcylindre, som er placeret rundt om koblingens akse, og som via 30 trykringen løfter klemsegmenterne ud af indgreb med den koniske koblingsflade på drivhovedet.From DE Publication No. 2 108 326, 15 is known a pelletizing machine with a coupling of the kind specified in the preamble. In this known coupling, two sets of exterior conical and internal cylindrical segments are mounted in the space between the cone surface and the cylinder surface, which alternate in the peripheral direction of the coupling, and the one set of segments is bolted to the drive head and serves to center the die, while the intermediate movable segments constitute clamping segments which are connected via a different axial parallel tension bolt to a pressure ring. Rubber springs are mounted between the pressure ring and the back of the drive head flange, which pull the moving segments downwards via the ring and bolts, thereby clamping the die. The disengagement is done by means of several hydraulic cylinders which are located around the axis of the coupling and which via the pressure ring lift the clamp segments out of engagement with the tapered coupling surface of the drive head.

Denne kobling har den ulempe, at der er en betydelig risiko for, at de enkelte hydraulikcylindre ikke følges fuldstændigt ad, hvilket ved indrykning af kob-35 lingen kan bevirke, at hulmatricen kæntrer, hvad der influerer uheldigt på segmenternes klemvirkning.This coupling has the disadvantage that there is a considerable risk that the individual hydraulic cylinders are not fully adhered to, which by insertion of the coupling can cause the hollow matrix to detect which adversely affects the clamping action of the segments.

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Koblingen ifølge opfindelsen adskiller sig fra den kendte ved, at klemsegmenterne udgøres af indbyrdes elastisk forbundne dele af en sammenhængende ring, og at hydraulikmekanismen indeholder et enkelt, ringformet 5 stempel, som samvirker med forlængede ender af samtlige trækbolte.The coupling according to the invention differs from the known in that the clamp segments are constituted by mutually elastically connected parts of a continuous ring and that the hydraulic mechanism contains a single annular 5 piston which cooperates with extended ends of all the tensioning bolts.

Det opnås herved, at den elastisk opdelte klemring ved aktivering af hydraulikmekanismen til udrykning af koblingen slipper sit greb om hulmatricen 10 øjeblikkelig og ensartet langs hele periferien, hvorefter matricen ikke mere fastholdes af hverken aksiale eller radiale kræfter, og fjernelsen af matricen og ombytning med en ny sker uden besvær og meget hurtigt.It is hereby achieved that the elastically divided clamping ring by actuating the hydraulic mechanism to extend the clutch relieves its grip on the cavity matrix 10 immediately and uniformly along the entire periphery, after which the matrix is no longer retained by either axial or radial forces, and the removal of the matrix and exchange with one another. new happens effortlessly and very quickly.

Dette opnås ved, at der anvendes en sammenhængende 15 ring, hvori hvert af de successive segmenter er både centrerings- og klemsegment, ved at segmenterne er indbyrdes elastisk forbundne, og ved at den hydrauliske aktiveringsmekanisme består af en enkelt cylinder med et enkelt ringformet stempel, som virker på samtlige 20 trækbolte.This is achieved by using a continuous ring in which each of the successive segments is both centering and clamping segments, the segments being elastically interconnected, and the hydraulic actuating mechanism consisting of a single cylinder with a single annular piston. which works on all 20 tension bolts.

Det er yderligere en fordel, at den elastisk opdelte ring overfører samtlige tangentialkræfter, dvs. det totale drejningsmoment mellem maskinens drivhoved og matricen alene ved friktion i ringens anlægsflader 25 mod de to dele. Efterhånden som friktionsfladerne slides, sker der en automatisk udligning ved en aksial forskydning af den sammenhængende ring, hvis momentoverførende evne herved bibeholdes fuldt ud.It is a further advantage that the elastically divided ring transmits all tangential forces, ie. the total torque between the machine's drive head and the die alone by friction in the abutment surfaces 25 of the ring against the two parts. As the friction surfaces wear, an automatic equalization occurs by an axial displacement of the contiguous ring, the torque transmitting capability being thereby fully maintained.

Opfindelsen forklares nærmere i det følgende un-30 der henvisning til tegningen, hvor fig. 1 viser et aksialsnit i en pelleteringsma-skines drivhoved ifølge opfindelsen, fig. 2 et delsnit i større målestok af koblingen ifølge opfindelsen, 35 fig. 3 et delsnit af den elastisk delte, koniske ring set i radialretningen, ogThe invention will be further explained in the following with reference to the drawing, in which: FIG. 1 is an axial sectional view of the pelletizer of the present invention; FIG. Fig. 2 is a larger sectional view of the coupling according to the invention; 3 is a partial section of the elastically divided tapered ring seen in the radial direction; and

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3 fig. 4 et delbillede af den koniske ring set i aksialretningen.3 FIG. 4 is a partial view of the tapered ring seen in the axial direction.

På tegningen er vist en kobling til hurtig tilkobling eller fastgørelse af en hulmatrice b på et 5 drivhoved a på en pelleteringsmaskine. Drivhovedet a bærer en ring c af hærdet stål, hvori hulmatricen b er fastgjort og centreret ved hjælp af en konisk ring d anbragt mellem ringen l og matricen b.The drawing shows a coupling for fast connection or attachment of a hollow die b to a drive head a on a pelletizer. The drive head a carries a ring c of hardened steel in which the hollow matrix b is fixed and centered by a tapered ring d arranged between the ring l and the matrix b.

Som det fremgår af fig. 3 og 4, har den koniske 10 ring d med jævne me.1 lemrum langs periferien tre radiale, dybe indsnit e, hvoraf de to ydre vender modsat det midterste, og er ved hjælp af disse delt i flere elastisk med hinanden forbundne segmenter.As shown in FIG. 3 and 4, the conical 10 ring d with even spaced spaces along the periphery has three radial, deep incisions e, the two outer faces of which are opposite to the middle, and are divided into several elastically connected segments by these.

Som det fremgår af fig. 1 og 2, befinder ringe-15 ne c og d sig med deres komplementære, koniske fladeri anlæg mod hinanden. Segmenterne af den koniske ring d virker som enkeltkiler, idet indsnittene e muliggør en radial udvidelse og sammentrækning af ringen d.As shown in FIG. 1 and 2, the rings c and d are with their complementary, tapered face abutments. The segments of the tapered ring d act as single wedges, the incisions e allowing for radial expansion and contraction of the ring d.

I den koniske ring d er der med jævne afstande 20 langs periferien indskruet flere, f.eks. tolv, trækbolte f. Disse forløber parallelt med maskinens omdrejningsakse g og er hver omgivet af en fjederstabel h, mod hvilken de ligger an med et hoved i . Fjederstablerne h holder boltene f under trækspænding, så at 25 disse trækker den koniske ring d fast ind i ringen c i drivhovedet a.In the conical ring d, at even distances 20 along the periphery, several screws are screwed in, e.g. twelve, pull bolts f. These extend parallel to the axis of rotation g of the machine and are each surrounded by a spring stack h against which they abut with a head i. The spring stacks h hold the bolts f under tensile tension so that 25 these pull the tapered ring d firmly into the ring c in the drive head a.

Det gensidige anlæg mellem de koniske flader i de to ringe c og d bevirker, at ringen d trækker sig sammen i radial retning og derved spænder fast omkring 30 hulmatricen b, så at denne fastholdes nøjagtigt centreret.The mutual arrangement between the tapered surfaces of the two rings c and d causes the ring d to contract in a radial direction, thereby clamping about the hole matrix b, so that it is precisely centered.

Til løsning af hulmatricen b fra den elastisk opdelte koniske ring d tjener et i en ringformet not styret ringstempel 1, som ligger an mod alle trækbol-35 tene f på en gang.To solve the hollow matrix b from the elastically divided conical ring d, a ring piston 1 guided in an annular groove serves to abut all the pull bolts f at one time.

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Ringstemplet 1 har ved både inderperiferien og yderperiferien en ringformet pakning m, der af to ringe />, f.eks. af bronze, holdes sammen under tryk. Et ringformet dæksel o, der dækker den ringforme-5 de not, er ved hjælp af skruer k fastghjort i et på bagsiden af drivhovedet a udformet sæde.The ring piston 1 has at both the inner periphery and the outer periphery an annular gasket m, which of two rings, e.g. of bronze, held together under pressure. An annular cover 0, covering the annular groove, is secured by means of screws k to a seat formed on the rear of the drive head a.

Ved tilførsel, f.eks. af hydraulisk trykmedium, gennem en tilslutning p forskydes ringstemplet 1 ak-sialt og forskyder derved trækboltene f i den koniske 10 ring d. Herved glider de koniske flader på de to ringe c og d på hinanden, så ringen d kan udvide sig i radialretningen og derved frigive hulmatricen.When supplied, e.g. of hydraulic pressure medium, through a connection p the annular piston 1 is axially displaced, thereby displacing the tensioning bolts of the tapered ring 10, thereby sliding the tapered surfaces of the two rings c and d so that the ring d can expand in the radial direction and thereby releasing the cavity matrix.

For at sikre frigivelse af hulmatricen b fra den koniske ring d har trækboltene f, som vist i fig.To ensure release of the hollow matrix b from the tapered ring d, the pull bolts f, as shown in FIG.

15 2, hver en konisk tilspidset del r, hvorpå støtter sig en stødstang s, der er indstillelig ved hjælp af en skrue q, og som f.eks. er af bronze.15, each having a tapered tapered portion r, on which is supported a thrust bar s which is adjustable by means of a screw q, such as e.g. is of bronze.

Ved en bevægelse af trækboltene f i retning af pilen i fig. 2 løber de koniske dele r op på stødstæn-20 gerne s og forskydes derved i tværretningen, så at den koniske ring d sikkert løsnes fra periferifladen af hulmatricen b, så at denne kan tages af og udveksles.By moving the pull bolts f in the direction of the arrow in FIG. 2, the tapered portions r rise on the thrust bars 20 and are thereby displaced in the transverse direction so that the tapered ring d is loosely detached from the peripheral surface of the hollow matrix b so that it can be removed and exchanged.

Ringen d, hvis segmenter under belastningen fra fjederstabelen h virker som fastgørelseskile mellem 25 drivhovedet a og hulmatricen b, samt indretningen af stødstængerne s, der støtter mod de koniske dele r af trækboltene f, og som tjener til radial forskydning af trækboltene, muliggør tilsammen en hurtig tilkobling og frakobling af hulmatricen uden anvendelse af centre-30 ringsskruer og holdeskruer.The ring d, whose segments under the load from the spring stack h act as a securing wedge between the drive head a and the hollow matrix b, as well as the arrangement of the push rods s, which support the tapered parts r of the tension bolts f, which serve to radially displace the tension bolts together fast coupling and disconnection of the hollow matrix without the use of centering screws and retaining screws.

Claims

1. Coupling for attaching a hollow die (6) to the drive head (a) of a pelletizing machine having a flange with a conical inner surface which, at an annular space, surrounds a cylindrical edge surface of the die, which coupling has clamp segments built into the annular space. and formed with outward facing surfaces complementary to the conical inside of the flange, axial parallel tension bolts (f) attached to the clamp segments and projecting out through openings in the flange, springs (h) clamped between the rear of the flange and recess (i) on the projecting ends. of the tensioning bolts, and a hydraulic mechanism acting on the tensioning bolts 15 for disengaging the clamping segments against the spring forces, characterized in that the clamping segments are constituted by mutually elastically connected parts of a continuous ring (d) and that the hydraulic mechanism contains a single ,, 20 annular piston (1). , which cooperates with extended ends of all tension bolts (f).

Coupling according to claim 1, characterized in that each bolt (f) in the vicinity of the ring Id) has a tapered section against which a pin (s) in the drive head (a) abuts.

Coupling according to claim 2, characterized in that the pin (s) is adjustable by means of a screw (q).

Coupling according to any one of claims 1-3, 30, characterized in that the continuous ring (d) is divided into segments by means of transverse incisions evenly distributed along the circumference of the ring.

Coupling according to claim 4, characterized in that between each pair of adjacent 35 clamp segments there is a group of at least three incision (s), the two outer faces of which are opposite to the middle. DK 152100 B

Coupling according to any one of claims 1-5, characterized in that the conical inside of the flange is formed on a separate ring (c) made of hardened steel and fixed to the drive head (a). *