US2117543A - Tube flaring tool - Google Patents

Ståthållare translated between Swedish and English including synonyms, definitions, and related words.

This application further discloses a tube end deforining element which is actuated by hydraulically operated means associated therewith. The lever is, in effect, mounted on a moving fulcrum which comprises the pins 45, and the fulcrum swings around the pins The chuck further includes coiled springs 2l mounted in drilled holes in each segment for normally urging the segments outwardly for permitting the completed tube to be readily removed and a new one inserted therefor.

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Prior art keywords tube end chuck ply tool Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not.





The recess I2 is of a depth substantially equal to the length of the chuck I4 and the latter is held against longitudinal movement between said plate and the rear wall I6 of the recess I2. The chuck I4 is adapted to grip the tube T as the end of the latter is ared and the plate I is formed with a central bore I8 through which the tube is inserted.

The chuck I4 is of the type specifically illustrated and described in the above mentioned copending application and generally comprises four tapered segmental members, the outer periphery of which is formed with an annular groove I 6 for receiving a snap ring 2U. This snap ring maintains the segments in unitary relation at all times.

The chuck further includes coiled springs 2l mounted in drilled holes in each segment for normally urging the segments outwardly for permitting the completed tube to be readily removed and a new one inserted therefor.

The segments of the chuck are urged into tube gripping engagement by means of the cam ring I3, said ring having a, bore 22 tapering downwardly an-d outwardly and generally conforming to the outer periphery of the chuck I4. In Figure 1 of the drawings, the cam ring I3 has been shifted toward the right so as to actuate the chuck segments radially inward to grip the tube T for the flaring operation.

The cam ring I3 is adapted to be actuated by the piston 9 in the rear cylinder 6 and is connected to said piston by means of four draw bolts The forward end of these bolts is provided with knurled nuts 24 which extend through the plate I5 and are held against the ring I3 as shown in Figure 1. The other end of the draw bolts screw threadedly engage a plate 25 which plate is mounted on the piston end 26, being locked thereon by means of a lock nut The piston 9 and its end extension 26 are formed with a central bore 28 in which is mounted a shaft 29, whose end 30 is threaded within the spacer member 1.

Thus it will be seen that as the piston 9 moves toward the right or left as viewed in Figure 1, it will be guided on the shaft 29 and will carry with it the plate 25, draw bolts 23 and cam ring I3 since these parts are all interconnected. Movement of the cam ring I3 to the left as viewed in Figure 1 releases the chuck I4 so that the completed tube can be removed and a new one inserted therefor. The piston 8 is ymovable toward the left as viewed in Figure 1 for effecting the two ply flaring of the end of the tube T.

This piston is formed with a central bore 3 in which is received a shaft 32, one end 33 of which threadedly engages the spacer member 1, and is held in abutting relation with the shaft end Suitable packing 34 is provided for sealing the pistons 8 and 9 on the shafts 32 and 29 respectively. The piston 8 is formed with a reduced end 35 whose diameter is greater than the diameter of the shaft 32 forming a recess 36 in which is received the end 31 of the two-ply flaring tool generally designated by the reference numeral It will be noted from an inspection of Figure 1 of the drawings that the reduced end 31 is formed with a bore 39 in which is positioned the other end 40 of the shaft Thus the flaring tool 38 is slidable on the shaft 32 within the recess 3B as will hereinafter appear, and said tool is adapted to be actuated by the piston 8 for flaring the tube T.

A coil spring 4I is positioned in the recess 36 in back of the reduced end 31 for normally urging the tool toward the outer end of the machine. The flaring tool 38 comprises a head l2 formed with a counterbore 43 in one face thereof, the other face being shaped to provide shoulder por tions 44 and The end 35 of the piston 8 is adapted to engage the shoulder 45 for urging the flaring tool toward the left as viewed in Figure 1 and it will be noted that the depth of said shoulder is substantially equal to the thickness of the reduced end Mounted within the counterbore 43 is the shaping tool which comprises three segmental shaped members 46 which members are held in said counterbore by means of the pair of semi-circular annular plates 41 and i3 carried in annular grooves 43 formed in said segments and attached to said head by screws or the like The plates 41 and 48 securely retain the segments against longitudinal movement but permit radial movement and when squeezed radially into engagement with one another are of perfect circular cross section.

For urging the segments out of engagement With one another there are provided coil springs 5I mounted in drilled holes in the segments, the tension of the springs being sufficient to urge the segments radially outward upon the release of pressure thereon. Each segment is formed with a tapered surface 52 and circular shaped reduced end 53, theA reduced end 53 and tapered surface 52 forming at their juncture, a shoulder As shown in Figure 3 of the drawings, a portion of each segment 46 is of annular formation as indicated at 55 fitting within the counterbore 43, the surface 52 tapering downwardly from said annular surface.

In open position, as shown in Fig. As the lever is rocked counter-clockwise, as shown in Fig. Upon further movement, as illustrated in Figs. By this link structure a straight line movement of the ram is obtained without resorting to a sliding connection, such as a slot and pin connection.

The lever is, in effect, mounted on a moving fulcrum which comprises the pins 45, and the fulcrum swings around the pins A punch member is shown in Fig. One end of the die has a projecting part 52, at the base of which isa recess 53 and an intermediate portion An enlarged part 55 has a shoulder 56 defining the end of the intermediate part A tube locating element is shown in Fig.

The base of the tool and lever may have contacting projections 63 and 64 for limiting lever movement. In use the proper dies are located in the base of the tool with a tube confined in. The end of the tube should be in alignment with the end of the dies. To thus locate the tube the locating element may be positioned in the ram, as shown in Fig. This also positions the diesby forcing the die elements back against the shoulder The tube is then clamped between the dies and the dies held in position by the clamping screw 5 and.

The lever may now be swung to open position, and the punch located, as shown in Fig. The lever is now swung, as illustrated in Fig. Upon further movement of the lever, as shown in Fig. The end 52 of the punch acts as a pilot or mandrel to keep the tube from collapsing.

At this time the part 54 of the punch enters the enlargements l1 of the dies and the tube is properly fashioned when. The shape of the bead or roll is determined by the shape of the die recess and the recess The lever may now be swung to retract the ram and the punch reversed, as shown in Fig.

The lever is again swung to advance the ram, at which time the end 51 of the punch enters the tube and serves as a pilot or mandrel, and the bevel face 58 folds inwardly the extreme end 1 of the tube.

The spaced member 1 is further formed with a passage 15 to afford communication between the cylinders 8 and 9 and mounted therein is a ball check valve 1I backed by a coil spring A restricted passage 13 extends from the passage 1I into the cylinder 5 allowingV the iluid under pressure to enter said cylinder for operating the piston 3.

In Figures 3, 4 andl5-of the drawings there is shown the several steps in the movement of the tool for two-ply flaring the tube T. In the operation of the device, let it be assumed that the chuck I4 is open and that the pistons 8 and 9 are in engagement with the spacer member 7.

The tube T can then be readily moved into position over the mandrel 56 within the jaws of the chuck I 4 with the end of the tube engaging the shoulder 54 of the tool It is to be understood that the outer diameter of the reduced end 53 is substantially equal to the inner diameter of the tube T so that the end of the tube will snugly engage said reduced end when the segments 45 are in their relaxed position.

This relaxed position is,. Yof course, caused'by expansion of the co-il springs 5I. Prior to starting the operation, the sleeve 60 has been rotated so as to move the pin 59 to the proper position for correct location of the tube relative to the flaring tool 38 and chuck I4. With the tube end engaging the shoulder 54 asin Figure 3 of the drawings, the tube and flaring tool 38 are moved rearwardly until the shoulder 44 contacts the pin 59 at which time the operator will know that the tube has been properly positioned and located.

The tool 33 will then be urged toward the left to the position shown in Figure 4 forming a bead 14 at the end of the tube, and at the same time forming the single flare which is caused by the tube end following the contour 16 of the chuck I4. Further movement of the tool toward the left starts to bend the beaded end 14 of the tube at an angle with respect to a plane perpendicular to the axis of the tube. Thus the tube end will not only be bent at an angle with respect to a plane perpendicular to the axis of the tube by reason of the flaring head 38 being moved toward the left, but the two-ply ilared portion of the tube will be squeezed into tight engagement through the cooperating conical surfaces of the segments 46 and chuck I4.

In order to release the completed tube and permit the insertion of a new tube, the piston 8 will be moved toward the right through iiuid entering the passage 64 and any fluid within the cylinder 5 will be exhausted through the check valve controlled passage 1i into the cylinder 6 Where it returns to the line through the passage Likewise, the piston 9 will be moved toward the left through iiuid entering the passage 66 and as said piston moves toward the left it carries thecam ring I3 through the draw bolts 23 to move the cam ring I3 out vof engagement with the chuck i4, thereby releasing the end oi the tube.

Fluid from within the cylinder is exhausted through the passage 63 and returned to the line. The completed tube can then be removed and a new tube inserted and the operation repeated. From the above description, when taken in connection with the accompanying drawings it will be readily apparent that there has been provided a single tool and a single operation for two-ply haring the end of a tube which differs from prior procedure wherein one tool is required to forni a bead while a second tool is required to turn the bead in to form the two-ply ilare.

While a specic type of hydraulicallyoperated machine has been illustrated and described for operating this two-ply flaring tool, it is to be understood that this tool is not limited to use with the particular machine shown. While one form of the invention has been shown for purposes oi illustration, it is to be clearly understood that various changes in the details of construction and arrangement of parts may be made without departing from the spirit and scope of the invention.

A machine for forming a two-ply iiare on the end of a tube comprising an external chuck for gripping and holding the tube, said chuck having an annular recess at its inner end providing tapered wall conforming to the desired taper of the outer face of the two-ply flare, a head in alignment with said tube for forming a two-ply are thereon, means for reciprocating said head, said head having a shoulder adapted to engage the end of the tube for buckling the same outward against the tapered wall of the recess in the chuck, said head having a tapered portion disposed in rear of said shoulder and adapted to move into the tube after it has been buckled against the Wall of the recess for folding the extreme end portion of the tube against the inner face of the 4outwardly ared portion, thus completing the two-ply flare.

A machine for forming a two-ply ilare on the end of a tube, comprising an external chuck for gripping and holding the tube, said chuck having an annular recess at its inner end providing a tapered wall conforming to the desired taper of the outer face of the two-ply nare, a head in alignment with said tube for forming a two-ply are thereon, means for reciprocating said head, said head having a cylindrical portion at the outer end thereof adapted to enter the tube, a shoulder at the inner end of said cylindrical portion adapted to engage the end of the tube for buckling the same outwardly against the tapered wall of the chuck, and a tapered portion disposed in rear of said shoulder and adapted to move into the tube after it has been buckled against the wall of the chuck for folding the extreme end portion of the tube against the inner face of the outwardly ared portion, thus completing the two-ply nare.

A machine for forming a two-ply are on the end of a tube, comprising an external chuck for gripping and holding the tube, said chuck having an annular recess at its inner end providing a tapered wall conforming to the desired taper of the outer face of the two-ply flare, an expansible head in alignment with said tube for forming a two-ply are thereon, means for reciprocating said head, said head having a series of segments, yielding means for normally holding said head expanded, said segments having shoulders adapted to engage the end of the tube for buckling the same outwardly against the tapered wall of the chuck, and tapered portions disposed in rear of said shoulders and adapted to move into the tube for contracting the head for folding the extreme end portion of the tube against the inner face of the outwardly flared portion, thus completing the two-ply are.

A machine for forming a. A machine for forming a two-ply flare on the end of a tube comprising an external chuck for gripping and holding the tube, means adapted to extend into a tube in the region of the external chuck against which said tube is' clamped by the chuck, means for positioning the tube in the chuck prior to the clamping of the same, an expansible head in alignment with said tube for forming a two-ply flare thereon, means for reciprocating said head, said head having a series of segments, yielding means for normally holding said head expanded, said segments having shoulders adapted to engage the end of the tube for buckling the same outwardly against the tapered wall of the chuck, and tapered portions disposed in rear of said shoulders and adapted to move into the tube for contracting the head for folding the extreme end portion of the tube against the inner face of the outwardly flared portion, thus completing the two-ply ilare.

Figure 5 is a similar view illustrating the position of the Darts after the two ply flaring 0peration has been completed, 2 Figure 6 is an end elevational view of the twoply flaring tool.

This relaxed position is, Yof course, caused'by expansion of the co-il springs 5I.

(C1. ) 'Ihis invention relates to a tube aring tool lhas been rocked, and also illustrating the mountand is particularly related to a tube aring tool ing for the lever. for use in service shops or repair shops or the Fig. 6 is a View similar to Figs. 4 and 5 illusllke. trating the ilnal position of the parts in one op- 'Ihe invention is. Ståthållare translated between Swedish and English including synonyms, definitions, and related words. Moved Permanently. nginx/