ITRA20110019A1

ITRA20110019A1 - MACHINE FOR THE PRODUCTION OF CORRUGATED TUBES FOR COLD PLASTIC DEFORMATION.

Info

Publication number: ITRA20110019A1
Application number: IT000019A
Authority: IT
Inventors: Marco Senni
Original assignee: Marco Senni
Priority date: 2011-06-14
Filing date: 2011-06-14
Publication date: 2012-12-15

Description

"MACCHINA PER LA PRODUZIONE DI TUBI CORRUGATI PER DEFORMAZIONE PLASTICA A FREDDOâ€ "MACHINE FOR THE PRODUCTION OF CORRUGATED PIPES FOR COLD PLASTIC DEFORMATIONâ €

DESCRIZIONE DESCRIPTION

Il presente trovato riguarda una nuova macchina per la produzione di tubi corrugati da ottenersi per deformazione plastica a freddo. The present invention relates to a new machine for the production of corrugated pipes to be obtained by cold plastic deformation.

Le applicazioni dei tubi corrugati sono molteplici. Infatti, sono utilizzati negli scambiatori termici a fascio tubiera, nelle centrali di riscaldamento urbano, negli scambiatori a gas, negli impianti per la distillazione dellâ€™acqua di mare, negli evaporatori, negli impianti frigoriferi, nei processi di raffreddamento di olio e aria, ecc. The applications of corrugated pipes are manifold. In fact, they are used in tube bundle heat exchangers, urban heating plants, gas exchangers, sea water distillation systems, evaporators, refrigeration systems, oil and air cooling processes, etc.

Vi sono poi applicazioni piÃ¹ innovative come, ad esempio, nel campo dell'industria alimentare e sanitaria. Soprattutto nel settore alimentare detti tubi sono particolarmente apprezzati, in quanto il prodotto da lavorare, attraversandoli a velocitÃ elevata, diventa molto omogeneo e si riscalda o si raffredda uniformemente, a seconda della lavorazione prevista. Alcuni esempi di utilizzo riguardano i processi di pastorizzazione di latte, crema, yogurt, conserve, ecc., ma anche i processi di scambio termico nella produzione di salse, sughi, zuppe, ecc., oppure la produzione di prodotti caseari, del latte di soia, ecc. There are also more innovative applications such as, for example, in the food and health industries. Especially in the food sector these tubes are particularly appreciated, as the product to be processed, passing through them at high speed, becomes very homogeneous and heats or cools evenly, depending on the foreseen processing. Some examples of use concern the pasteurization processes of milk, cream, yogurt, preserves, etc., but also the heat exchange processes in the production of sauces, gravies, soups, etc., or the production of dairy products, milk soy, etc.

Attualmente, i tubi corrugati sono ottenuti, nelle varie lunghezze previste, mediante macchine rullatrici in cui due, tre o anche cinque rulli, posizionati radialmente intorno al tubo e con gli assi inclinati di circa 10° rispetto allâ€™asse del tubo stesso, ruotano contro detto tubo che, nel frattempo, avanza tra loro. Currently, corrugated pipes are obtained, in the various lengths provided, by means of rolling machines in which two, three or even five rollers, positioned radially around the pipe and with their axes inclined by about 10 ° with respect to the axis of the pipe itself, rotate against said tube which, in the meantime, advances between them.

Scopo del presente trovato Ã ̈ quello di offrire una macchina con cui realizzare tubi aventi un qualsiasi numero di principi e, soprattutto, un numero di principi molto elevato, quale attualmente non Ã ̈ possibile ottenere. The purpose of the present invention is to offer a machine with which to make tubes having any number of start points and, above all, a very high number of start, which it is currently not possible to obtain.

In questa macchina Ã ̈ previsto che un tubo cilindrico ruoti su se stesso nel mentre una pluralitÃ di utensili, avanzando lungo detto tubo sorretti da un apposito carrello, intervengono in modo da conferirgli la forma ed il passo desiderati. In this machine a cylindrical tube is expected to rotate on itself while a plurality of tools, advancing along said tube supported by a special carriage, intervene in order to give it the desired shape and pitch.

Queste ed altre caratteristiche del trovato sono di seguito descritte con riferimento a quattro tavole di disegno dove, a solo titolo indicativo e non limitativo, sono rappresentate: These and other characteristics of the invention are described below with reference to four drawing tables where, for indicative and non-limiting purposes only, the following are shown:

- le FIGG. 1 e 2, che mostrano la vista laterale e la vista in pianta di una macchina realizzata secondo il trovato ; - FIGS. 1 and 2, which show the side view and the plan view of a machine made according to the invention;

- la FIG. 3, che mostra il particolare del carrello porta-utensili attrezzato per realizzare un tubo a piÃ¹ principi; - FIG. 3, which shows the detail of the tool-holder trolley equipped to make a multi-start tube;

- la FIG. 4, che mostra la sezione XX riferita alla FIG. 3; - FIG. 4, which shows the section XX referred to in FIG. 3;

- la FIG. 5, che mostra il particolare del carrello porta-utensili attrezzato per realizzare un tubo corrugato a sezione ellittica; - FIG. 5, which shows the detail of the tool-holder trolley equipped to make a corrugated tube with an elliptical section;

- la FIG. 6, che mostra la sezione XX riferita alla FIG. 5; - FIG. 6, which shows the section XX referred to in FIG. 5;

- le FIGG. 7 e 8, che mostrano, con altrettante viste di tre quarti, rispettivamente il particolare della FIG. 3 e quello della FIG. 5. - FIGS. 7 and 8, which show, with as many three-quarter views, respectively, the detail of FIG. 3 and that of FIG. 5.

Dall'esame dei disegni allegati ed iniziando da quelli delle FIGG. 1 e 2, si evince che la macchina in oggetto, completamente automatizzata anche se non rappresentato nelle figure per semplicitÃ , comprende: una testa elettromeccanica 1 che, similmente ad un mandrino di tipo noto, aggrappa il tubo T trattenendolo; una contropunta 2, anch'essa controllata elettronicamente, che blocca il tubo T sulla macchina e che rileva le deformazioni; un carrello motorizzato 3, che si muove longitudinalmente lungo il tubo stesso e che sostiene una coppia di gruppi contrapposti (4, 5 e 6), ognuno di azionamento di un utensile specifico (40, 50, 60) che agisce sul tubo rotante T. In particolare, per ottenere un tubo con una pluralitÃ di principi la coppia di utensili che deve effettuare la lavorazione Ã ̈ costituita da un rullo 40 ed un utensile di contrasto 50, (FIGG. 3, 4 e 7), mentre invece, per ottenere un tubo avente sezione finale pressochÃ© ellittica, la coppia di utensili che deve effettuare la lavorazione Ã ̈ costituita da due rulli contrapposti 60, (FIGG. From the examination of the attached drawings and starting with those of FIGS. 1 and 2, it can be seen that the machine in question, completely automated even if not shown in the figures for simplicity, comprises: an electromechanical head 1 which, similarly to a known type of mandrel, grips the tube T by holding it; a tailstock 2, also electronically controlled, which blocks the tube T on the machine and which detects the deformations; a motorized carriage 3, which moves longitudinally along the tube itself and which supports a pair of opposing groups (4, 5 and 6), each of which activates a specific tool (40, 50, 60) which acts on the rotating tube T. In particular, to obtain a tube with a plurality of principles, the pair of tools that must perform the machining consists of a roller 40 and a contrast tool 50, (FIGS. 3, 4 and 7), while instead, to obtain a tube having an almost elliptical final section, the pair of tools that must perform the machining consists of two opposing rollers 60, (FIGS.

5, 6 e 8). 5, 6 and 8).

Nel primo caso (FIGG. 3, 4 e 7), un rullo folle 40 avente asse di rotazione inclinato rispetto allâ€™asse del tubo T in funzione del passo da ottenere e del diametro del tubo stesso, viene fatto avanzare perpendicolarmente all'asse del tubo da mezzi di traslazione 41 azionati elettronicamente e viene posizionato in modo da penetrare radialmente nel tubo stesso venendo contrastato, durante la traslazione longitudinale di lavorazione del carrello 3, da un utensile 50 sagomato a moâ€™ di squadretta e che, posizionato diametralmente opposto a detto rullo 40, Ã ̈ anch'esso movimentato perpendicolarmente al tubo T con mezzi di traslazione 51 azionati elettronicamente. In the first case (FIGS. 3, 4 and 7), an idle roller 40 having an axis of rotation inclined with respect to the axis of the tube T as a function of the pitch to be obtained and the diameter of the tube itself, is made to advance perpendicular to the axis of the tube by electronically operated translation means 41 and is positioned so as to penetrate radially into the tube itself, being opposed, during the longitudinal processing translation of the carriage 3, by a tool 50 shaped as a bracket and which, diametrically opposite to said roller 40, it is also moved perpendicularly to the tube T by electronically operated translation means 51.

In questa lavorazione a piÃ¹ principi, la realizzazione di ogni principio Ã ̈ ottenuta da piÃ¹ passaggi consecutivi del rullo 40 nello stesso solco, fino ad arrivare alla profonditÃ voluta in maniera graduale e con una deformazione che, quindi, non stressa e non incrudisce il materiale. In this multi-principle processing, the realization of each principle is obtained by several consecutive passes of the roller 40 in the same groove, up to the desired depth gradually and with a deformation which, therefore, does not stress and harden the material. .

Ovviamente, al termine di ogni passaggio del rullo 40 il tubo T risulta accorciato e, quindi, risulta necessario rilevarne la deformazione lineare ed angolare tramite la contropunta o contro mandrino, onde riposizionare detto rullo 40 in corrispondenza dello stesso punto di partenza, ma opportunamente inclinato ed avanzato perpendicolarmente al tubo in modo da penetrare piÃ¹ in profonditÃ nello stesso ed effettuare il successivo passaggio di lavorazione del medesimo principio. Obviously, at the end of each passage of the roller 40 the tube T is shortened and, therefore, it is necessary to detect its linear and angular deformation by means of the tailstock or counter spindle, in order to reposition said roller 40 in correspondence with the same starting point, but suitably inclined. and advanced perpendicular to the tube in order to penetrate deeper into it and carry out the subsequent processing step of the same principle.

Terminato il primo principio, il controllo elettronico della macchina consente di effettuare tutti i successivi principi, determinando, di volta in volta, il nuovo punto di partenza angolare. Once the first principle is finished, the electronic control of the machine allows you to carry out all the subsequent principles, determining, each time, the new angular starting point.

Nel caso deile FIGG. 5, 6 e 8 ovvero quando si voglia ottenere un tubo corrugato avente sezione finale ellittica, due rulli folli 60 vengono posizionati diametralmente opposti rispetto al tubo stesso e con gli assi di rotazione che, giacenti su piani paralleli, sono inclinati e simmetricamente sfalsati rispetto all'asse del tubo T, in funzione del passo da ottenere e del diametro del tubo stesso. In the case of FIGS. 5, 6 and 8 or when you want to obtain a corrugated tube having an elliptical final section, two idle rollers 60 are positioned diametrically opposite to the tube itself and with the rotation axes which, lying on parallel planes, are inclined and symmetrically offset with respect to the axis of the tube T, as a function of the pitch to be obtained and the diameter of the tube itself.

Detti rulli 60 sono fatti avanzare perpendicolarmente allâ€™asse del tubo T da mezzi di traslazione 61 azionati elettronicamente e sono quindi posizionati in modo da penetrare radialmente nel tubo stesso contrastandosi reciprocamente, durante la loro traslazione longitudinale per mezzo del carrello 3. Said rollers 60 are made to advance perpendicularly to the axis of the tube T by electronically operated translation means 61 and are therefore positioned so as to penetrate radially into the tube itself, mutually opposing each other, during their longitudinal translation by means of the carriage 3.

Dette traslazioni longitudinali del carrello motorizzato 3 lungo il tubo T sono nella fattispecie ottenute mediante cremagliera e grazie a pattini 7 che, applicati al di sotto della piastra 30, sono impegnati su guide lineari 70, ma potrebbero essere ottenute con qualsiasi altro mezzo equivalente. Said longitudinal translations of the motorized carriage 3 along the tube T are in this case obtained by means of a rack and thanks to skids 7 which, applied below the plate 30, are engaged on linear guides 70, but could be obtained by any other equivalent means.

Invece, per quanto riguarda le traslazioni degli utensili 40-50-60 perpendicolarmente al tubo T, ognuno di detti utensili Ã ̈ azionato pneumaticamente o idraulicamente mediante attuatori noti ed Ã ̈ inoltre predisposto per ruotare intorno al proprio asse longitudinale onde assumere, di volta in volta, lâ€™inclinazione necessaria. On the other hand, as regards the translations of the tools 40-50-60 perpendicular to the tube T, each of said tools is operated pneumatically or hydraulically by means of known actuators and is also arranged to rotate around its own longitudinal axis in order to assume, from time to time time, the necessary inclination.

Inoltre, mezzi elettronici di tipo noto rendono automatiche tutte le operazioni della macchina, fra lâ€™altro gestite da un PLC posto in un apposito pannello elettrico, non raffigurato per semplicitÃ . Furthermore, known electronic means make all the operations of the machine automatic, among other things managed by a PLC placed in a special electric panel, not shown for simplicity.

E' ovvio che, ferme restando le caratteristiche di massima illustrate e descritte, non Ã ̈ escluso che la macchina in oggetto possa essere suscettibile di eventuali modifiche o varianti comunque comprese nel presente ambito brevettale. It is obvious that, without prejudice to the general characteristics illustrated and described, it is not excluded that the machine in question may be susceptible to any modifications or variations in any case included in the present patent scope.

Claims

CLAIMS 1) Machine for the production of corrugated pipes by cold plastic deformation, characterized in that it comprises an electromechanical head (1) which grips the pipe (T) and holds it; a tailstock (2), also electronically controlled, which blocks the tube (T) on the machine and detects its deformations; a motorized carriage (3), which moves longitudinally along the tube itself and which supports means (4, 5; 6), for driving tools (40, 50; 60) which act on the rotating tube (T).

2) Machine, as in claim 1, in which said means (4) drive an idle roller (40) which, having an axis of rotation inclined with respect to the axis of the tube (T) as a function of the pitch to be obtained and the diameter of the the tube itself is made to advance perpendicularly to the axis of the tube by translation means (41) and is positioned so as to penetrate radially into the tube itself.

3) Machine, as per claims 1 and 2, in which said means (5) operate a tool (50) shaped as a square and positioned diametrically opposite to said roller (40) to oppose it during its intervention on the tube (T ), said tool (50) being moved perpendicularly to the tube (T) with translation means (51).

4) Machine, as in claim 1, in which said means (6) drive a pair of idle rollers (60), said rollers being positioned diametrically opposite with respect to the tube (T) and with the rotation axes lying on parallel planes , are inclined and symmetrically offset with respect to the axis of the tube (T), according to the pitch to be obtained and the diameter of the tube itself.

5) Machine, as in claim 4, in which said rollers (60) are made to advance perpendicularly to the axis of the tube (T) by translation means (61) and are therefore positioned so as to penetrate radially into the tube itself, mutually opposing , during the translation of the trolley (3) longitudinally to the trolley itself.

6) Machine, as in claim 1, in which the motorized carriage (3) comprises a plate (30) for supporting the means (4, 5; 6) and provided at the bottom with runners (7) engaged on linear guides (70) for the longitudinal translations along the tube (T), obtained by means of a rack or other suitable means.

7) Machine, as in claim 1, in which the means (41, 51; 61) for translating the tools (40, 50; 60) perpendicular to the tube (T) are known pneumatic or hydraulic actuators or other suitable devices.

8) Machine, as per one or more of the preceding claims, in which electronic means of the known type make all the operations of the machine automatic, among other things managed by a PLC placed in a special electrical panel.

9) Process for obtaining multi-principle pipes using the machine according to claims 1-2-3, in which the realization of each principle is obtained by several consecutive passes of the roller (40) in the same groove up to the desired depth and contrasted by the € ™ tool (50), at the end of each passage it being necessary to detect the linear and angular deformation of the tube (T) in order to reposition said roller (40) at the same starting point and suitably inclined and advanced perpendicular to the tube so as to penetrate deeper into it and carry out the subsequent processing step of the same principle; once the first principle is finished, the electronic control of the machine allows to carry out all the subsequent principles, determining, from time to time, the new angular starting point.

10) Process for obtaining tubes having an elliptical final section using the machine according to claims 1-4-5, in which the processing is obtained by several consecutive passes of each roller (60) in the same groove up to the desired depth and contrasted by the ™ other roller (60) diametrically opposite, at the end of each passage it being necessary to detect the linear and angular deformation of the tube (T) in order to reposition said rollers (60) in correspondence with the same starting point and suitably inclined and advanced perpendicularly to the in order to penetrate deeper into it and carry out the subsequent processing steps.