FR2544237A1

FR2544237A1 - Machine with reduced weight and bulk for chamfering tubes

Info

Publication number: FR2544237A1
Application number: FR8306271A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1983-04-14
Filing date: 1983-04-14
Publication date: 1984-10-19
Also published as: FR2544237B1

Abstract

Portable machine with reduced weight (6.5 kg) and bulk, for chamfering tubes. This invention relates to the portable machine for chamfering tubes from 12 to 150 mm in diameter. Its reduced bulk (57 or even 53 mm) allows the machining, in less than a minute, of adjoining tubes forming a panel, without removing them. The shaft 1 actuated by a nut 2 expands the fins 3. The parts A, B, C, D, then form a homogenous block; the machine is fixed into the tube. The motor 4 drives a tool holder 5 whose cutter 6 controlled by an advancement control 7 performs the machining. An additional tool holder 8 makes it possible to chamfer from 57 to 150 mm in diameter. This machine may also be used for performing, furthermore, a quality weld preparation or for destroying weld beads or even for making openings in the lateral walls of boilers.

Description

DESCRIPTION
Cette invention concerne une machine portative à chanfreiner les tubes de 12 à 150 mm de diamètre. Son encombrement réduit (57 voire 53 mm) permet l'usinage en moins d'une minute de tubes jointifs formant panneau sans les extraire.DESCRIPTION
This invention relates to a portable machine for chamfering tubes from 12 to 150 mm in diameter. Its reduced size (57 or even 53 mm) allows the machining in less than a minute of joining tubes forming a panel without removing them.

Cette machine comporte un arbre actionné par un écrou qui crée un point fixe à l'intérieur du tube à usiner grâce à l'expansion de six ailettes de forme trapézoidale. This machine has a shaft actuated by a nut which creates a fixed point inside the tube to be machined thanks to the expansion of six trapezoidal fins.

Cette machine portative à chanfreiner est formée d'un corps en aluminium formant base de réduction. This portable chamfering machine is made of an aluminum body forming a reduction base.

Cette machine portative à chanfreiner comporte à l'intérieur de son moteur un filetage en sens inverse de l'effort produit assurant son auto-blocage
En outre, les efforts donnés par le moteur sont repris au moyen d'un roulement combiné (aiguille-buté a' billes) qui est emprisonné entre l'épaulement d'un carter et une bague intermédiaire poussée par le moteur.This portable chamfering machine has inside its motor a thread in the opposite direction to the force produced ensuring its self-locking
In addition, the forces given by the motor are taken up by means of a combined bearing (needle-thrust ball bearing) which is trapped between the shoulder of a casing and an intermediate ring pushed by the motor.

Par ailleurs, le porte-outil de cette machine de 57 mm de diamètre (voire 53 mmm) peut porter jusqu'à six outils différents et donc permettre 8i- multanément jusqu'à six usinages différents ; un porte-outil supplémentaire permettrait d'usiner des tubes de diamètre supérieur à 57 mmm et jusqu'à 150 mm de diamètre. Furthermore, the tool holder of this 57 mm diameter machine (even 53 mmm) can carry up to six different tools and therefore allow up to six different machining operations simultaneously; an additional tool holder would allow tubes of diameter greater than 57 mmm and up to 150 mm in diameter to be machined.

Les jeux entré le cartère et le porte-outil sont annulés à l'aide d'un dispositif de roulements à rouleaux coniques en opposition. The clearances between the casing and the tool holder are canceled using an opposing tapered roller bearing device.

Enfin, cette machine peut être équipée de deux moteurs pneumatiques différents permettant des vitesses de 380 et 600 tours minute à vide. Finally, this machine can be equipped with two different pneumatic motors allowing speeds of 380 and 600 revolutions per minute when empty.

Le collecteur d'6chappement est relié à un silencieux permettant l'apte nustion du bruit. The exhaust manifold is connected to a silencer allowing the noise absorption.

L'usinage de tubes jointifs formant panneau ne peut pas être réalisé ou n'est réalisé que sur des tubes de 60 imnni de diamètre, avec des appareillages connus de ce genre. The machining of contiguous tubes forming a panel cannot be carried out or is only carried out on tubes of 60 mm in diameter, with known apparatuses of this kind.

D'autre part. aucun appareillage ne réunît à lui-seul l'ensemble des éléments suivants
- Un encombrement de 57 mm voire 53 mm,
- Un arbre extérieur de 20 mmm dediamêtre qui reprend en totalité les efforts de coupe grâce au dispositifs spécial des ailettes permettant de fixer en un bloc homogène arbre extérieur, arbre intérieur, ailettes et paroi du tube,
- la précontrainte des roulements à rouleaux qui annule le jeu entre le carter et le porte-outil,
- Le réglage du jeu des engrenages de l'extérieur, par quatre vis, sans démonter la machine,
- Le réglage de la tension de précontrainte des roulements à rouleaux de l'extérieur, par quatre vis, sans démonter la machine,
- Un roulement à galets placé au niveau du couteau, qui élimine les phénomènes de vibration et porte-à-faux du couteau,
- Un bloc d'ailettes solidarisées par élastomère ou caoutchouc, afin d'éviter de les égarer et d'en faciliter la mise en place,
- un dispositif d'avance monté sur buté à galets avec jeu latéral pour éviter les blocages.On the other hand. no device brings together all of the following elements
- A space requirement of 57 mm or even 53 mm,
- An outer shaft of 20 mm in diameter which fully takes up the cutting forces thanks to the special fins devices making it possible to fix in a homogeneous block the outer shaft, inner shaft, fins and wall of the tube,
- the prestressing of the roller bearings which cancels the play between the casing and the tool holder,
- The adjustment of the play of the gears from the outside, by four screws, without dismantling the machine,
- Adjustment of the prestressing tension of the roller bearings from the outside, by four screws, without dismantling the machine,
- A roller bearing placed at the level of the knife, which eliminates the phenomena of vibration and overhang of the knife,
- A block of fins secured by elastomer or rubber, in order to avoid losing them and to facilitate their installation,
- a feed device mounted on a roller stop with lateral play to avoid blockages.

la machine selon l'invention autorise le passage entre deux tubes jointifs de 57 mm voire 53 mm de diamètre pour réaliser l'usinage désiré. En outre, ses différentes possibilités de réglage permettent un travail de haute qualité équivalent à celle obtenue par une machine-outil. the machine according to the invention allows passage between two contiguous tubes of 57 mm or even 53 mm in diameter to carry out the desired machining. In addition, its various adjustment possibilities allow high-quality work equivalent to that obtained by a machine tool.

D'autre part, le bloc d'ailettes grâce à sa forme, bloque à la fois les arbres intérieur et extérieur contre la paroi du tube Ceci permet une reprise de la flexion sur l'arbre extérieur dans sa totalité. On the other hand, the fin block thanks to its shape, blocks both the inner and outer shafts against the wall of the tube This allows resumption of bending on the outer shaft in its entirety.

la réunion de toutes ces caractéristiques fait que cette machine peut être utilisée avec succès pour réaliser des fenêtres dans les parois latérales des chaudières, détruire les cordons de soudure sur générateurs de vapeur nucléaires, préparer à la soudure ave-c la qualité exigée par les industries de l'énergie classiques et nucléaires, de l'armement naval, industriel et militaire, de la chimie et pétrochimie. the combination of all these characteristics means that this machine can be successfully used to make windows in the side walls of boilers, destroy weld seams on nuclear steam generators, prepare for welding with the quality demanded by industries conventional and nuclear energy, naval, industrial and military armaments, chemicals and petrochemicals.

Claims

R $ N5EDICATIONS

1. Portable machine for chamfering tubes from 12 to 150 mm in diameter allowing, thanks to its reduced size (57 or even 53 mm), the machining of joined tubes forming a panel in less than a minute, without removing them. It is characterized by the creation of a fixed point inside the tube to be machined and this thanks to six fins of trapezoidal shape secured by rubber or elastomer.

2. Portable chamfering machine according to claim 1 characterized in that the force exerted on the fins by bringing together the cones of the inner and outer shafts ensures the creation of a homogeneous block between the shafts, the fins and the wall of the tube.

3. Portable chamfering machine according to claim 1, characterized in that its aluminum body. forming reduction box by angle gear allows a reduced size of 57 (or even 53 mm in steel).

4. Portable chamfering machine according to claim 3, characterized in that the j # adjustment devices between the pinion and the crown, and prestressing by tapered roller bearings can be operated from the outside by 4 screws.

5. Portable chamfering machine according to claim 1, characterized in that its motor is provided with a thread in the opposite direction to the force produced and thus ensures its self-locking.

6. Portable chamfering machine according to claim 5, characterized in that the forces given by the motor are taken up by means of a combined bearing (needle-thrust ball bearings) which is trapped between a spur in the casing and a intermediate ring pushed by the motor.

7. Portable chamfering machine according to claim 1, characterized in that its tool holder of 57 mm in diameter (or even 53 mm) can carry up to # six different tools and simultaneously allow up to six different machining operations.

8. Portable chamfering machine according to claim 1, characterized in that an additional tool holder allows tubes of diameter greater than 57 mm and up to 150 mm in diameter to be defined

9. Portable chamfering machine according to claim 8, characterized in that the clearances between the casing and the tool holder are canceled using a device of tapered roller bearings in opposition.

10. Portable chamfering machine according to claim 1, characterized in that it can be equipped with two different pneumatic motors allowing speeds of 380 and 600 rpm. empty.

11. portable chamfering machine according to claim I, characterized by the fact that a silencer or an exhaust manifold allows noise reduction. (complete cancellation by hydraulic motor).