US3262298A

US3262298A - Flaring and burnishing tool

Info

Publication number: US3262298A
Application number: US342483A
Authority: US
Inventors: Abraham M Samuels; Eugene B Shapiro
Original assignee: CHICAGO SPECIALTY Manufacturing Co
Current assignee: CHICAGO SPECIALTY Manufacturing Co
Priority date: 1964-02-04
Filing date: 1964-02-04
Publication date: 1966-07-26
Anticipated expiration: 1983-07-26

Description

y 26, 1966 A. M. SAMUELS ETAL 3,262,298

FLARING AND BURNISHING TOOL Filed Feb. 4, 1964 f7ZU67Z 9715 Abra/ m M sdm 5 {5 56726 B. al

United States Patent 3,262,298 FLARING AND BURNISHING TOOL Abraham M. Samuels, Chicago, and Eugene B. Shapiro,

Skokie, 111., assignors to Chicago Specialty Manufacturing Co., Skokie, 111., a corporation of Illinois Filed Feb. 4, 1964, Ser. No. 342,483 6 Claims. (Cl. 72-117) This invention relates to improvements in a flaring and burnishing tool.

One of the objects of this invention is to provide a flaring and burnishing tool in which the flaring head is coupled to the rotating shaft so as to rotate with the shaft and be capable of movement axially with respect to the shaft and in which the yieldable means is supported in the flaring head.

Another object of this invention is to provide a tool which will flare a tube by the rotation of the shaft in one direction and will burnish the flared end of the tube by automatically maintaining the flaring tool in engagement with the tube during the rotation of the flaring tool in the opposite direction, and in which the yieldable means are supported in the flaring head closely adjacent the tube end.

Another object of this invention is to provide a flaring and burnishing tool which is highly efiicient in operation and economical to produce.

Other objects will become apparent as this description progresses.

In the drawings:

FIG. 1 is an elevational view, partly in section, of the tool of this invention, with the end of the tube clamped in position for flaring.

FIG. 2 is an enlarged longitudinal sectional View with the tool in flaring position, and

FIG. 3 is a view similar to FIG. 2 but with the tool in burnishing position.

The tool includes a frame member generally indicated at which is of a generally C-shaped configuration in side elevation, having a top portion 12 with a connected rear side portion 13 and a bottom 14 having spaced legs 15 which form the supports. The top 12 has a central internally threaded bore 16 to accommodate an externally threaded shaft 18. The shaft 18 has a handle 20 rigidly secured to it at its upper end so that the shaft may be manually rotated by said handle and thereby move the shaft axially in said bore.

The lower end of shaft 18 is provided with a shaft portion 22 of reduced diameter and a continuing shaft portion 23 of a further reduced diameter which provides a shoulder 24 between the

shaft portions

22 and 23. Both said shaft portions are unthreaded. The end wall 25 of shaft portion 23 forms a stop member, as will be subsequently described. Fixed to the shaft portion 22 is a transverse pin 26, the sides of which extend laterally of the shaft.

A tube flaring member generally indicated at 27 includes a cone-shaped member 28 provided with a central bore or recess 30 for receiving the lower end of the shaft portion 22 and the shaft portion 23. The cone member has spaced transversely extending alined openings or slots 32 which receive the opposite ends of the pin 26. A coiled compression spring 34 is positioned in the bore 30 of the cone member 28 around the shaft portion 23, with one end of the spring bearing against the inside tapered wall 36 of the cone member 28 and the other against the shoulder 24 of the shaft. The transverse openings or slots 36 in the cone are larger than the diameter of the pin to permit a relative axial movement of the cone member 28 relative to the shaft 18 and a rotative movement therewith. The spring 34 will normally urge the cone "ice member in a direction outwardly or away from the end of the shaft 18 and the pin 26 will engage the upper inside wall of the slot 32 for limiting outward axial movement of the cone member 28 relative to the shaft 18. The end wall 25 of the shaft 18 is the stop means engageable by the cone member 27 when the cone is urged upwardly in the flaring operation.

While the pin 26 is shown supported on the shaft, and the cone member has the slots 32 to accommodate the pin, it will be understood that same may be reversed, namely, that the pin may be secured to the cone member and the shaft may be provided with a transverse slot to loosely accommodate the pin. In either arrangement the pin 26 is inserted and the attachments made as aforesaid after the spring 34 and the end of the shaft are inserted in the bore of the cone.

The operation briefly described is as follows.

The tube T to be flared and burnished is placed in a conventional clamping means or split-type clamping block, generally indicated at 40, having the usual tapered surface 42. The tube clamping means and tube are sup ported in the frame 10, as shown in FIG. 1, with the clamping means resting on the spaced legs 15 and the tube T extending downwardly between the legs. The shaft 18 is rotated by the handle 20 for moving the shaft axially with respect to the frame 10. The clockwise rotation of the shaft 18 will cause the cone member 28 to engage the end of the tube T and the cone member will move inwardly compressing the spring 34 until the inside tapered wall 36 of the cone member engages the end wall 25 of the shaft 18, which limits the inward movement of the cone member or flaring tool and causes the flaring cone to flare the end of the tube, as shown in FIG. 2.

Upon the reverse or counterclockwise rotation of the shaft 18 through the rotation of the handle 20, the shaft will move axially away from the tube T, yet the spring 34 will expand and push against the cone member 28, causing the cone member 28 to move in an outwardly direction and thereby urge the cone member 28 to remain in contact with the flared tube T and burnish the flared tube until the shaft 18 has been rotated counterclockwise sufficient-ly to withdraw the cone member 28 from its contact with the flared tube. Thus, with the initial reverse or withdrawal rotation of the shaft 18 the cone member remains in contact with the flared tube to effect the burnishing operation.

It will be understood that various changes and modifications may be made from the foregoing without departing from the spirit and scope of the appended claims.

What is claimed is:

1. A tube flaring and burnishing tool comprising a Q frame member having a threaded bore through one portion thereof and a support portion adapted to have a tube end supported therein in alinement with said threaded bore, an externally threaded shaft engaged in said threaded bore for rotative and axial movement relative to said frame, tube flaring and burnishing means including a cone, said cone having a bore with the end of said shaft secured within said bore, coupling said cone to said shaft secured within said bore, coupling means for coupling said cone to said shaft for permitting axial movement of said cone with respect to said shaft but rotative movement therewith, spring means positioned within said bore between said cone and said shaft, a handle for rotating said shaft and said cone in either direction to advance or retract said shaft, said spring means normally urging said cone outwardly, said coupling means limiting the outward movement of said cone, said shaft having means engaging said cone for limiting the inward movement of said cone relative to said shaft when the shaft is advanced and said cone is in tube flaring operation, said spring means forcefully maintaining said cone urged against the tube to effect a burnishing thereof during retracting rotation of said shaft until said cone disengages from the tube.

2. A structure defined in claim 1 in which the coupling means include a pin on the shaft and a slot in the cone engageable by said pin.

3. A structure defined in claim 1 in which the coupling means include a pin member and a slot member movable with respect to each other, with one of said members on the shaft and the other on the cone.

4. A structure defined in claim 1 in which the spring means is a resilient member.

5. A structure defined in claim 1 in which the shaft has a portion of a reduced diameter extending within the bore of the cone and adapted to engage an inside wall in the bore of the cone for limiting the inward movement of the cone relative to the shaft.

6. A structure defined in claim 5 in which the spring is around the reduced diameter portion of the shaft.

References Cited by the Examiner UNITED STATES PATENTS CHARLES W. LANHAM, Primary Examiner.

Claims

1. A TUBE FLARING AND BURNISHING TOOL COMPRISING A FRAME MEMBER HAVING A THREADED BORE THROUGH ONE PORTION THEREOF AND A SUPPORT PORTION ADAPTED TO HAVE A TUBE END SUPPORTED THEREIN IN ALINEMENT WITH SAID THREADED BORE, AN EXTERNALLY THREADED SHAFT ENGAGED IN SAID THREADED BORE FOR ROTATIVE AND AXIAL MOVEMENT RELATIVE TO SAID FRAME, TUBE FLARING AND BURNISHING MEANS INCLUDING A CONE, SAID CONE HAVING A BORE WITH THE END OF SAID SHAFT SECURED WITHIN SAID BORE, COUPLING SAID CONE TO SAID SHAFT SECURED WITHIN SAID BORE COUPLING MEANS FOR COUPLING SAID CORE TO SAID SHAFT FOR PERMITTING AXIAL MOVEMENT OF SAID CORE WITH RESPECT TO SAID SHAFT BUT ROTATIVE MOVEMENT THEREWITH, SPRING MEANS POSITIONED WITHIN SAID BORE BETWEEN SAID CONE AND SAID SHAFT, A HANDLE FOR ROTATING SAID SHAFT AND SAID CONE IN EITHER DIRECTION TO ADVANCE OR RETRACT SAID SHAFT, SAID SPRING MEANS NORMALLY URGING SAID CONE OUTWARDLY, SAID COUPLING MEANS LIMITING THE OUTWARD MOVEMENT OF SAID CONE, SAID SHAFT HAVING MEANS ENGAGING SAID CONE FOR LIMITING THE INWARD MOVEMENT OF SAID CONE RELATIVE TO SAID KSHAFT WHEN THE SAFT IS ADVANCED AND SAID CONE IS IN TUBE FLARING OPERATION, SAID SPRING MEANS FORCEFULLY MAINTAINING SAID CONE URGED AGAINST THE TUBE TO EFFECT A BURNISHING THEREOF DURING RETRACTING ROTATION OF SAID SHAFT UNTIL SAID CONE DISENGAGES FROM THE TUBE.