FR2466288A1 - MACHINE FOR MAKING STITCHING AND CALIBRATION ON TUBES - Google Patents

Abstract

Machine for carrying out stitching and sizing on tubes, in particular made of copper, in which a bench supports a fixed headstock which is provided with a spindle carrying a rotary mandrel disposed opposite a carriage mounted to slide longitudinally on the bench. The machining tool is held clamped in the jaws 7 of the rotary chuck 4 and on the carriage 10 is pivotally mounted a turret 11 capable of occupying two positions offset by 90 degrees and comprising a clamping means 12, 13 of the tube allowing to selectively present a tube coaxially with the spindle and a tube with its axis perpendicular to the axis of the spindle. The invention is used to produce risers for gas. (CF DRAWING IN BOPI)

Description

The subject of this invention is a machine

  for making taps and calibrations on the tubes.

  It is known to use machines that make it possible to perform on tuDes including cui-vref an operation called "stitching" which consists of raising, outwardly, the edge of a hole made in the wall of the tube to form a collar in which is engaged a calibrated tube for its

  joining by soldering and obtaining a connection.

  However, currently known machines

  ensure only the formation of the stitching on the tubes and do not allow

  not respect the precision standards that are currently

  particularly imposed with respect to pipelines

  of gas inside the residential buildings.

  The machine according to the invention has the main object of ensuring the realization of copper risers in

  respecting the standards The precision corresponding to the

  S 524 of the Assozcat-on Technique du Gaz de France.

  Moreover, said machine according to the invention makes it possible to provide two functions which are, the obtaining of orifices with edges fallen by extrusion on copper tube and the calibration of the bypass tube to be brazed on this orifice on the length

necessary for brazing.

  According to the present invention the machining tool is kept tight in the jaws of the rotary chuck and in that the carriage is pivotally mounted a turret susceptible to occupy two positions offset by 900 and comprising

  tube clamping means for selectively presenting

  a tube coaxially to the spindle for a cali-

  and a tube with its axis perpendicular to the axis of the spindle for drilling and extruding operations with calibration of a

collar on the outside of the tube.

  Other features and advantages of the invention

  tion will be better understood by reading the description that will

  follow of an exemplary embodiment and with reference to the accompanying drawings, in which: Figure 1 is a front elevational view of

the machine according to the invention.

  FIG. 2 is a left side view of

  the machine shown in FIG.

  FIG. 3 is a right side view of

  the machine shown in FIG.

  Figure 4 is a rear elevational view

  of the machine shown in FIG.

  5. Figure 5 is a top view of the machine

according to the invention.

  FIG. 6 is a detail view in cross section.

  trant clamping means of the tubes.

  FIG. 7 is a sectional view of the means of

flow of the tube trolley.

  FIG. 8 is a sectional view of the transmission

geared gears ..

  FIG. 9 is a sectional view of a tool for

tube calibration.

  15. Figure 10 is a sectional view of a tool

  extrusion for making-tapping.

  FIGS. 1, 2, 3, 4 and 5 show an embodiment of the machine according to the invention consisting of a bench 1 resting on the ground and supporting at one of its ends a fixed doll 2 on which is mounted a pin 3 which is provided at one of its ends with a rotary mandrel 4, said spindle being connected by a belt transmission to a motor 6 for the rotational drive of the spindle 3

and mandrel 4.

  The mandrel 4 has jaws 7 between which

  is likely to be engaged a calibration tool or ex-

  which will be described in more detail below. The jaws 7 of the mandrel 4 are actuated by means of a fluid such as compressed air and the supply is carried out by means of conduits 21, 21a (FIG. 4) which are connected to a source of compressed air

  12 via a control box 23.

  At the other end of the bench 1 is fixed a support plate 8 on which are mounted at one of their ends two bars 9, Ra which are fixed at their other end on the fixed headstock 2, said bars 9, 9a constituting slides on which slide along the longitudinal axis of the bench 1, an Ip carriage which is provided at its upper part with a pivoting turret 11 capable of occupying two offset positions

  of 90 as shown in Figures 2 and 5.

  The turret 11 (FIG. 6) comprises a means for clamping the tubes to be machined which consists of a fixed jaw 12 integral with the body of the turret II and a movable jaw 13 between which a tube 14 is held tight. The movable jaw 13 is provided with a stop 15 having a housing 15 in which is engaged the end of a threaded rod 16 which meshes

  with a nut integral with the body of the turret 11.

  At its other end the threaded rod 16 is provided with an operating wheel 17 for actuating the movable jaw

  13 through the rod 16.

  The fixed jaw 12 has a bore 18 whose axis is perpendicular to the longitudinal axis of the jaws and in which is screwed a centering tip 19 itself having a bore which opens outwards through a bore 20 of the body

  11. This provision allows the introduction of the extrusion tool

  in the bores 20 and 18 for the machining of the arranged tube

between the jaws 12 and 13.

  The drive of the carriage 10 which is guided by the bars 9, 9a is made for the movement derecul by means of a gear train which is actuated from a gear 24 which is wedged on the rotary spindle 3. This gear train (FIG. 8) comprises a pinion 25 which is wedged on a shaft 26 rotatably mounted between two flanges 27, 28 of the casing, said pinion 25 being driven by the gear 24 and the shaft 26 carrying a pinion. 29 which meshes with a pinion 30 set on a shaft 31 rotatably mounted between the flanges 27, 28, said shaft 31 being integral with a pinion 32 which meshes with a pinion 33 fixed to one end of a lead screw 34 rotatably mounted between two bearings, 35 respectively secured to the casing of the fixed doll 2

and plate 8.

  The lead screw 34 which is rotated from the spindle of the machine via the gear train, meshes with a nut composed of two half-nuts 36, 36a (FIG 7) which are integral with the carriage by rods 37, 37a on which the half-nuts can slide under the action of the nipples 38, 38 aqq.qq.dpi.res half, nuts and which can slide in slots. eccentric 39,39 has a pivoting plate 40 that can be. operated from the outside

by a joystick 41 (Fige 4).

  The forward and backward motion of the trolley is

done manually.

  For this purpose, one of the bars 9 has a crest

  mesh 42 which meshes with a pinion (not shown in the drawing) and which is fixed to the end of a shaft 43 which carries at its other end an operating lever 44 capable of displacing the

trolley 10 manually.

  On the carriage 10 is mounted a shaft 45 secured to the turret 11 and which is connected by a screw nut system to a pawl 46 controlled by a handle 47 and to bring the

  turret It of the position shown in solid lines for the ex-

  truding in FIGS. 2 and 5, at the dotted position

for calibration.

  To delimit the angular positions of the turret, there are provided two bosses 48, 48 which cooperate with a boss 49 provided on the shaft 45 in order to delimit the two positions.

  In FIG. 9, a mode of realization

  a tool for calibrating a tube, said tool being constituted

  killed a cylindrical body 50 whose tail 50 is engaged between the jaws 7 of the mandrel 4, said body having two bores

  b and 50 c in which is engaged a centering pin 51 cylin-

  drique which is held in the body by a screw 52.

  Between the body weight 50c and the centering pin

  51 is provided an annular space 53 constituting the calibration space

  brage in which is engaged the tube intended to constitute the part

male of the quilting.

  In Figure 10 there is shown a tool for the ex-

  trimming the tube after drilling a hole with a cutter.

  This tool consists of a cylindrical body 54 whose tail 54a is held tight between the jaws 7 of the mandrel 4, and

  has a neck portion 54b on which is mounted slides

  A follower 55 bends the body 54. After the neck portion 54 b, the body 54 terminates in a smaller diameter rod at the end of which is formed a lug 56 in which is pivotally mounted about an axis 57 perpendicular to axis

  of the rod an extruder member 58 having the shape of a half

  criconférence. In the central part of the body is drilled a blind hole 59 in which is slidably mounted a pusher 60 bearing against the periphery of the extruder member 58 under

  the action of a spring 61 disposed in the bottom of the hole 59.

  The sleeve 55 comprises a slot 62 in which the extruder member 58 can be engaged in order to pivot it and to retract it between the faces of the

housing 56.

  Furthermore the edge 63 of the extruder member

  presents in cross section a semicircular shape.

  To calibrate the male part of a tapping, the tool 50 shown in Figure 9 is mounted between the jaws 7 of the mandrel 4 and the turret 11 is in the position shown in broken lines in Figures 2 and 5. The tube is engaged between the jaws 12, 13 of the turret and the mandrel

  4 is rotated and the tool 50, 51.

  The lever 44 acting manually by the shaft 43 and the pinion meshing with the rack 42, on the carriage 10 and the turret 11 is then manually actuated and communicates to the tube a forward and reverse movement during which said tube is engaged. by one of its ends in space 53 of

  the calibration tool. The recoil of the trolley can also be effected

  kill by means of the automatic device via the mother screw 34 and the half-nuts 36, 36 a when acting on the lever 41. An adjustable stop on one of the two guides of the turret 11 limits in advance and therefore settle

  the length of the calibrated part of the tube.

  In order to proceed with the execution of the female part or the tapping of the tube, the turret 11 is placed in the position shown in solid lines in FIGS. 2 and 5 and the tube 14 is fixed between the jaws 12, 13 so that the tapping is next to bores 19, 20 (Fig. 6). A cutting cutter is mounted on the mandrel 4 which is rotated, the carriage 10 and the turret 11 are advanced in order to pierce a hole in the tube, then the strawberry is replaced by the extruder tool 54, 58 which is jmqnté between the jaws 7 of the mandrel 5. The extruder member 58 is escaimoté in its housing 56 by means of the sleeve 55. With the tool stopped and the mandrel 4, it acts by means of lever 44 on the carriage 10 and by a movement

  in advance of the tube 14, the stem 54 and the extrusion member are penetrated.

  58 in the hole drilled in the tube until the extruder member 58 is completely inside the tube. In this position and under the action of the pusher 60, the member 58 then automatically resumes its working position represented in FIG.

figure 10.

  The mandrel 4 and the tool which it carries is rotated and the automatic retracting device of the trolley is activated by means of the lever 41 which acts on the half-nuts 36, 36 a to grip the main screw. 34 which leads

the carriage 10 and the turret 11.

  During this retreat of the turret 11, the extruder member 58 discharges on the outside a collar 14a and caliber

  the recess in the tube 14 (Fig.

  This last operation must be repeated two

  times to obtain a satisfactory result.

  Of course various modifications may be made by those skilled in the art devices or processes that have just been described by way of non-limiting example

  without departing from the scope of the invention.

Claims (6)

REVENDICATIDNS   1. Machine for making branchings and calibrations on tubes, in particular in the case of a cog, in which a bench supports a fixed headstock which is provided with a spindle carrying a rotary mandrel arranged opposite a carriage mounted longitudinally sliding on the bench , characterized in that the machining tool is held tight in the jaws of the rotary mandrel and in that on the carriage is pivotally mounted a turret capable of occupying two positions offset by 90 and comprising a clamping means of the tube allowing selectively presenting a tube coaxially to the spindle for a calibration operation and a tube with its axis perpendicular to the axis of the spindle for the drilling and extruding operations with   calibration of a collar outside the tube.   2. Machine according to claim 1, characterized in that the carriage carrying the turret is entrainA by a disengageable mother screw which is connected to a motor member by a speed reducing transmission means; said motor member being   controlled by an electrical safety contact member.   3. Machine according to claim 1, characterized in that the carriage carrying the turret is driven manually by a rack meshing with a pinion integral with a shaft carrying an operating lever.   4. Machine according to claim 1, characterized in that the turret is pivotally mounted on the carriage by means of an axis which is connected by a screw to a nut driven by a ratchet handle.   5. Machine according to claim 1, characterized in that the clamping means of the tube is constituted by a fixed jaw secured to the body of the turret and by a movable jaw which is provided with a stop against which is pressed a threaded rod engaged in a nut secured to the body of the turret and carrying at its free end a steering wheel said fixed jaw having a bore whose axis is perpendicular to the longitudinal axis doz-, jaws and comprises a centering tip opening to the outside the turret for the commitment of the extruder tool.   at. Machine according to claim 1, characterized in that the tool for the sizing operation consists of a cylindrical body having a bore in which a cylindrical centering pin is arranged, so as to provide an annular space between the body and the centering pin constituting the calibration space in which the tube is engaged   intended to constitute the male part of the stitching.   7. Machine according to claim 1, characterized in that the tool for the extrusion operation consists of a cylindrical body having at one of its ends a rod of smaller diameter in which is formed a   housing receiving an extruder member in the form of a half   circumference, said extruder member being pivotally mounted on a   axis perpendicular to the axis of the stem, and being subjected to   to the action of a sliding sleeve on the cylindrical body   drique and a pusher slidably mounted in the central part of the body, said pusher being subjected to the action of a spring   which tends to hold the pusher against the central part of the roller.   E. Machine according to claim 7, characterized in that the extruder member has a cross section a semi circular edge.