CA1041888A - Flaring tool - Google Patents
Flaring toolInfo
- Publication number
- CA1041888A CA1041888A CA224,244A CA224244A CA1041888A CA 1041888 A CA1041888 A CA 1041888A CA 224244 A CA224244 A CA 224244A CA 1041888 A CA1041888 A CA 1041888A
- Authority
- CA
- Canada
- Prior art keywords
- flaring
- jaws
- clamping portions
- tube
- tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
- B21D41/021—Enlarging by means of tube-flaring hand tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Clamps And Clips (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A tool for flaring a tube end, having a constrictible body carrying tube clamping jaws in removable association therewith and providing a tube clamping force by transmission for a constrictive force through the body and jaws to the tube to be flared. The tube clamping structure is arranged hold the tube substantially positively against axial dis-placement during a flaring operation. A flaring cone threadedly mounted to a yoke portion of the body is forcibly urged into the end of the held tube.
A tool for flaring a tube end, having a constrictible body carrying tube clamping jaws in removable association therewith and providing a tube clamping force by transmission for a constrictive force through the body and jaws to the tube to be flared. The tube clamping structure is arranged hold the tube substantially positively against axial dis-placement during a flaring operation. A flaring cone threadedly mounted to a yoke portion of the body is forcibly urged into the end of the held tube.
Description
~ ~a4l~s - BACKGROUND OF THE I~TVl;.`~TION
Field of the Int~ention This invention relates to tube working tools and in particular to tube flaring tools.
DescriPtion o~ the Prior Art ~ . .
one conventional foxm o- tuba flaring tool includes '- -:
a body having a yoke portion and depending legs. The distal : . .. .
j end o~ the legs a~e inturned to support a tubc holding clamp in alignment with a flaring cone carried on the end of a stem which is threaded through the yoke portion and which is rotatable ' by means of a handle secured to its opposite end. One example of ~uch a tube flaring tool is shown in the George E. Franck U~ ted States Lettars Patent 3,027,931, owned by the assignee ~-` hereof. The clamp means for ho1ding the tube end may be pro-f - vided in the form o~ a pair of clàmp bars which are adjustablyd~Qw together to clamp the tube end~therebetween in suitable confront-~ng segmentally cylindrical recesses. An example of such a clamp . . . . .
~- ~ar means is shown in the Robert D. McIntosh United States .
~etters Patent 2,242,831. Another clamp bar of this ~ype - 20 ~ illustrated in United Statcs Letters Patent 2,314,221 c . -.. . . . ...
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of E~gar E. Kellems.
Still another flaring tool u~ilizing such tube clamping means is shown in United States Letters Patent 3,421,354 of Richard V. Strybel et al, owned by ~he assignee hereof.
A somewhat different form of tube clamping means is illustrated in the George E. Franck United States Letters Patent 3,073,375, wherein a pair of blocks having perip~,eral recesses are selectively positioned to hold different diameter tools in the flaring tool. In the flaring tool of the George E. Franck Vnited States Letters Patent 2,774,408, the tube is clamped in a pair of blocks which are cubical in shape and which have the different surfaces thereof provided with the plurality of hemicylindrical grooves for accommodating different diameter tubes.
, In United States Letters Patent 2,526,110 of Robert B. Edelmann, the clamping blocks ~re rotatably mo~nted to a body portion of the clamp structure.
In the tube flaring machine of Albert E. Watts dis-closed in United States Letters Patent 2,532,250, two-part , 20 expanding dies are retained in support blocks carried in U-shaped brackets. A tightening screw clamps the blocks to- ~
- gether to urge the expanding dies tightly about the tube to ~ -, be flared. --j In United States Letters Patent 2,124,743 of John G.
-., McMahon, a tube flaring tool is provided utilizing a plurality ~
of different size split die members, each having the same ~ -outside diameter so as to be selectively received in an opening of the yoke of the tool for clamped assoclation with the tube s ed by means o a wing bolt.
In United States Letters Patent 3,044,531 of Frank R.
W~lson, in~ert~ axe provided in the elongated clamping bars ~or accommodating the clamping means to tubing of different sizes.
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SUMMARY OF THE INVENTION
The present invention in its broader aspects comprehends an improved tool for flaring a tube end which tool includes a body member having a yoke portion and a plurality of apposed, spaced clamping portions extending resiliently from the yoke portion to define a jaw receiving space therebetween. A pair of jaws in the space have confronting tube engaging concave surfaces definin~ a flaring axis and adjustable means are provided for forcibly urging the clamping portions radially inwardly toward the axis thereby to urge the jaws inwardly into holding relationship with a tube disposed therebetween and extending coaxially toward the yoke portion. Flaring means are adjustably carried by the yoke for coaxially flaring the end of the held tube.
Preferably the flaring tool has clamping portions which extend from the yoke portion in an annular array and the jaw receiving space between the clamping portions is generally cylindrical. The pair of jaws are segmentally ; 20 cylindrical and cooperating shoulder means on the clamping portions and jaws prevent axial movement of the jaws from -the space when urged into the tube holding relationship. The clamping portions having a resiliency which is preselected to cause radial separation of the shoulder means as an incident of release of the adjustable means to permit the jaws to be ~- -j inserted axially into the space and to permit the jaws and the flared tube to be withdrawn axially from the jaw receiving space upon completion of the flaring of the tube end.
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8~8 -I The tool may be formed of a relatively low cost material, such as molded synthetic resin with the clamping portions defining relatively thin wall portions of the body member.
The adjustable clamping means, in the illustrated embodiment, comprises a band encircling the annular array of clamping leg portions to radially constrict the array and thereby urge the jaws into the desired tube holding arrangement.
Each set of jaws may be maintained in paired relationship by a retainer arranged to permit snap-in 10 assembly of the jaws therewith. The retainer may comprise a loop element with the jaws slidably received within and engaging side walls of the loop for guided disposition toward and from each other. The retainer may serve as a handle ~-for facilitated installation and removal of the jaw pair -. . . .
from the flaring tool body, such as in substitution of -different size jaw pairs for use of the tool with different ? diameter tubes. - -The invention comprehends an improved jaw arrangement wherein one end of the jaw recesses is counterbored to prevent canting and provide improved balanced clamping forces -in the operation of the tool.
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~ 3a-The body member includes means for effectively retaining the constricting band in position thereon. In the illustrated embodiment, the band is retained on thc body member by outwardly projecting pad means and distal flange - -means.
The band is dra~n, to effect the desired constriction of the clamping portion of the body member, by means of a threaded force transmitting member threaded through one portion of the band. The force transmitting member acts through a clamping pad engaging the clamping portion of the body member to constrict the clamping portion. The force transmitting member includes a head portion received in a slot of the clamping pad for facilitated transfer of force therebetween.
The slot is arranged to effectively maintain the assembly not-, withstanding a loosening of the band. The loosening of the band is limited by the outward movement of the pad to a stop ~, position, thereby providing an automatic preselected released - -:
~- arrangement of the clamping means.
The clamping portions arranged in the annular array permits the jaws to be inserted omnidirectionally `~ relative to the axis of the tube flaring means. As the forces , generated in the flaring operation in the clamping means com-prise substantially only tensile forces, the clamping - -portions may compri~e a relatively thin wall section. - -The flaring tool of the present invention is extremely economical and simple of construction while yet providing ; the desirable features discussed above.
~ BRIEF DESCRIPTION OF THE DRAWING :-i~ Other features and advantages of the invention will 30 be apparent from the following description taken in connection :
-i with the accompanying drawing wherein:
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FIGURE 1 i.s a side elcvation of a flariny tool embodying the ~nventis-FIGURE 2 is a transverse section tak~n substantiallyalong the line 2-2 of Figure l;
FIGURE 3 is a transverse section taken substantially along the line 3-3 of Figure l;
FIGURE 4 is a rragmentary enlarged diametric section taken substantially.along the line 4-~ of Figure 2;
- FIGURE 5 is a longitudinal section taken substantially . 10 along the line 5-5 of Figure 4;
FIGURE 6 is a transverse section taken substantially along the line 6-6 of Figure 4; and FIGURE 7 is a fragmentary diametric section illus- -: :
trating the mounting of the jaws in the clamping portion of the body member. -~ DESCRIPTION OF TH~, PREFERRED EMBODIMENT
- In the exemplary embodiment of the invention as . disclosed in the drawing, a flaring tool generally designated :~ -~; 10 is shown to comprise a body member 11 defining a yoke por-. .
tion 12 and an annular clamping portion 13. Thus, as seen in ~ Figures 1 and 3, the body member effectively comprises a cup- ;.
shaped member with the clamping portion 13 being provided with :. longitudinal slots 1~ spaced circumferentially about the axis .
15 thereof. Resultingly, the clamping portion effectively ' comprises a plurality of segmentally cylindrical legs 16 de-: pending from the yoke portion 12.
The body member may be formed of a suitable resilient material, such as molded synthetic resin, whereby the clamping :~ portion 13 may be selectiveiy constricted by a band 17 encircling 30 the clamping portion 13. The band may comprise a metal strap -~
having it8 ends 18 secured together and provided with a female ,,~ , .
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threaded el~ment ]~. A rod 20 extends through the overlappcd band ends 18 and is threaded through element 19. The distal end of the rod is provided with a cylindrical head 21 received in a slot 22 of a clamping pad 23 for effecting movement of the pad 23 toward and from the axis 15, as best seen in Figure 6.
The clamping pad may define an inner segmentally cylindrical surface 24 engaging the clamping portion 13 of the body member in opposition to the engagement of band 17, as shown in Figure 6. Thus, as shown, the threading o~ rod 20 inwardly through the element 19 urges the clamping pad 23 against several of the clamping portion legs 16 and concur- ~-- rently pulls the band 17 against the opposite legs 16, to effect a orceful constriction of clamping portion 13 wherein the legs i are deflected radially toward the axis 15.
Reversely, a retrograde threading of rod 20 outwardly , through element 19 causes a withdrawal of the clamping pad 23 from clamping portion 13 to relax the clamping portion. - -~- As shown in Figure 6, the outward movement of clamping pad 23 ~, 20 may be limited by the engagement thereof with element 19 to ~ ;
provide a preselected retraction o~ the clamping means.
The distal end of rod 20 may be provided with a -~
.:, .
~ manual operating handle 25, as shown in Figure 1, for providin~ ~ -j facilitated manual constriction of the clamp~ng means. As -~i further shown in Figure 1, the band 17 is effectively retained in association with body member 11 by a pair of axially spaced shoulders defined by a lug 26, and a distal outturned flange --27 on the clamping portion. The clamping pad may be retained between the flange and a second lug 28 on the clamping portion ,! 30 13 aga~nst axial displacement, as further shown in Figure 4.
The tube end T to be flared is held in the clamping ~ .
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portion 13 by jaws 29 comprisincJ semiannular jaw elements 30 and 31 movably re~in~d in apposed association by a jaw re-tainer 32. As shown in Figure 5, the jaws are provided with radially opening slots 33 slidably receiving the rectilinear side portions 34 of the jaw retainer 32 for adjustable re-tention in the juxtaposed relationship.
Thus, a plurality of jaw pairs 29 may be provided or use with different diameter tubes. The paired jaws are removably installed in the cylindrical space 35 defined by 10 the annular clamping portion 13 and are releasably retained therein by locking shoulders 36 on the clamping portion legs 16 and cooperating shoulder 37 on the cylindrical periphery of the jaws. The shoulders 36 and 37 define segmentally annular shoulders and, thus, the jaw assemblies 29 may be mounted in the clamping portion 13 omnidirectionally, i.e., in any ro-tational position about the axis 15. As shown in Figures 4 and 7, the jaws are preferably beveled so as to ~acilitate spreading of the clamping portion legs 16 against the r~silient s biasing thereof in inserting and removing the jaws from the 20 space 35. As discussed above, during such insertion and re-; moval, the band 17 is disposed in the relaxed arrangement to -permit the necessary expansion of the clamping portion.
The installation of the jaws in the clamping portion 13 and the removal thereof from the clamping portion 13 is facilitated by use of the jaw retainer 32 as a handle as the jaw retainer proj~cts outwardly from the lower end of the clamping portion ~?~ as best seen in Figures 1, 3 and 4.
Further as shc-.~n in Figure 1, the outturned flange 27 on the clamping portion 13 serves as a limit to the insertion of 30 the jaws by the ahutment therewith of the side portions 34 of the jaw retalnex 32.
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To suitably hold the tube end T during the flariny operation, thc tube cnd is ins~rted through the cylindrical space 38 defined by thc jaw pair~ 30 and 31, as shown in : Figure 4. The inner surface 39 defining the space 38 may be suitably formed to provide improved tube gripping, and as shown in Figure 4, is threaded. To effect the desired clamp-ing of the tube end extended through the space 38, the user merely manipulates handle 25 to thread rod 20 through the .
: element 19 thereby constricting the clamping portion 13 as discussed above and, in turn, urging the jaw halves 30 and 31 .
forcibl~ toward each other whereby the gripping surfaces 39 ~ firmly hold the tube end coaxially of axis 15.
.-~ Flaring of the tube end is effected by urging a flar- -;3 ing cone 40 coaxially into the distal end of the tube, as . shown in Figure 5. Flaring cone 40 is carried on the lower end :
of a threaded stem 41 which is threaded to an internally ~i . threaded sleeve 42 secured to yoke 12 o~ the body 11. The .- upper end of the threaded stem 41 may be provided with a handle -~;
43 to effect rotation of the stem and resultant forcible urging o$ the flaxing cone 40 into the held tube end. - -As shown in Figure 4, the flaring cone abuts the body yoke 12 in the retracted position of the flaring cone ~; 80 that insertion of the tube end T through the jaw spa~ce 38 ! ~ into engagement with the cone provides an automatic preselected . . .
s~ positioning of the tube suitable to form the desired flaxe i~ upon subsequent advance of the flaring cone into the tube end, as shown in Figure 5. As will be obvious to those skilled in : the art, the ~aws 29 may be provided with an upper chamfer ~o define a backup means for the flare where the flare is . -~: 30 effected within the jaws rather than in the portion extanding ~ ' ,- - .
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upwardly from the jaws, as shown. The clamping of tube end T
by the above described constriction of the clamping portion 13 effectively positively holds the tube end coaxially with the flaring cone 40 to provide an improved accurate flare while yet permitting the overall flaring tool to be of minimum size.
To further assure accurate alignment of the tube, prevent canting thereof, and ~rovide a balancing of the clamping forces, the internal surface 39 of the jaws is undercut at the lower end 44, as best seen in Figures 4 and 5.
The foregoing disclosure of specific embodiments is illustrative of the broad inventive concepts comprehended -by the invention.
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Field of the Int~ention This invention relates to tube working tools and in particular to tube flaring tools.
DescriPtion o~ the Prior Art ~ . .
one conventional foxm o- tuba flaring tool includes '- -:
a body having a yoke portion and depending legs. The distal : . .. .
j end o~ the legs a~e inturned to support a tubc holding clamp in alignment with a flaring cone carried on the end of a stem which is threaded through the yoke portion and which is rotatable ' by means of a handle secured to its opposite end. One example of ~uch a tube flaring tool is shown in the George E. Franck U~ ted States Lettars Patent 3,027,931, owned by the assignee ~-` hereof. The clamp means for ho1ding the tube end may be pro-f - vided in the form o~ a pair of clàmp bars which are adjustablyd~Qw together to clamp the tube end~therebetween in suitable confront-~ng segmentally cylindrical recesses. An example of such a clamp . . . . .
~- ~ar means is shown in the Robert D. McIntosh United States .
~etters Patent 2,242,831. Another clamp bar of this ~ype - 20 ~ illustrated in United Statcs Letters Patent 2,314,221 c . -.. . . . ...
,, , : ~ :., -A ~
~, ' ''" ,, '' ~' '.' :, ,~. . : .
"~ . , .
of E~gar E. Kellems.
Still another flaring tool u~ilizing such tube clamping means is shown in United States Letters Patent 3,421,354 of Richard V. Strybel et al, owned by ~he assignee hereof.
A somewhat different form of tube clamping means is illustrated in the George E. Franck United States Letters Patent 3,073,375, wherein a pair of blocks having perip~,eral recesses are selectively positioned to hold different diameter tools in the flaring tool. In the flaring tool of the George E. Franck Vnited States Letters Patent 2,774,408, the tube is clamped in a pair of blocks which are cubical in shape and which have the different surfaces thereof provided with the plurality of hemicylindrical grooves for accommodating different diameter tubes.
, In United States Letters Patent 2,526,110 of Robert B. Edelmann, the clamping blocks ~re rotatably mo~nted to a body portion of the clamp structure.
In the tube flaring machine of Albert E. Watts dis-closed in United States Letters Patent 2,532,250, two-part , 20 expanding dies are retained in support blocks carried in U-shaped brackets. A tightening screw clamps the blocks to- ~
- gether to urge the expanding dies tightly about the tube to ~ -, be flared. --j In United States Letters Patent 2,124,743 of John G.
-., McMahon, a tube flaring tool is provided utilizing a plurality ~
of different size split die members, each having the same ~ -outside diameter so as to be selectively received in an opening of the yoke of the tool for clamped assoclation with the tube s ed by means o a wing bolt.
In United States Letters Patent 3,044,531 of Frank R.
W~lson, in~ert~ axe provided in the elongated clamping bars ~or accommodating the clamping means to tubing of different sizes.
. ~,. . .
4~}8~
SUMMARY OF THE INVENTION
The present invention in its broader aspects comprehends an improved tool for flaring a tube end which tool includes a body member having a yoke portion and a plurality of apposed, spaced clamping portions extending resiliently from the yoke portion to define a jaw receiving space therebetween. A pair of jaws in the space have confronting tube engaging concave surfaces definin~ a flaring axis and adjustable means are provided for forcibly urging the clamping portions radially inwardly toward the axis thereby to urge the jaws inwardly into holding relationship with a tube disposed therebetween and extending coaxially toward the yoke portion. Flaring means are adjustably carried by the yoke for coaxially flaring the end of the held tube.
Preferably the flaring tool has clamping portions which extend from the yoke portion in an annular array and the jaw receiving space between the clamping portions is generally cylindrical. The pair of jaws are segmentally ; 20 cylindrical and cooperating shoulder means on the clamping portions and jaws prevent axial movement of the jaws from -the space when urged into the tube holding relationship. The clamping portions having a resiliency which is preselected to cause radial separation of the shoulder means as an incident of release of the adjustable means to permit the jaws to be ~- -j inserted axially into the space and to permit the jaws and the flared tube to be withdrawn axially from the jaw receiving space upon completion of the flaring of the tube end.
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8~8 -I The tool may be formed of a relatively low cost material, such as molded synthetic resin with the clamping portions defining relatively thin wall portions of the body member.
The adjustable clamping means, in the illustrated embodiment, comprises a band encircling the annular array of clamping leg portions to radially constrict the array and thereby urge the jaws into the desired tube holding arrangement.
Each set of jaws may be maintained in paired relationship by a retainer arranged to permit snap-in 10 assembly of the jaws therewith. The retainer may comprise a loop element with the jaws slidably received within and engaging side walls of the loop for guided disposition toward and from each other. The retainer may serve as a handle ~-for facilitated installation and removal of the jaw pair -. . . .
from the flaring tool body, such as in substitution of -different size jaw pairs for use of the tool with different ? diameter tubes. - -The invention comprehends an improved jaw arrangement wherein one end of the jaw recesses is counterbored to prevent canting and provide improved balanced clamping forces -in the operation of the tool.
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~ 3a-The body member includes means for effectively retaining the constricting band in position thereon. In the illustrated embodiment, the band is retained on thc body member by outwardly projecting pad means and distal flange - -means.
The band is dra~n, to effect the desired constriction of the clamping portion of the body member, by means of a threaded force transmitting member threaded through one portion of the band. The force transmitting member acts through a clamping pad engaging the clamping portion of the body member to constrict the clamping portion. The force transmitting member includes a head portion received in a slot of the clamping pad for facilitated transfer of force therebetween.
The slot is arranged to effectively maintain the assembly not-, withstanding a loosening of the band. The loosening of the band is limited by the outward movement of the pad to a stop ~, position, thereby providing an automatic preselected released - -:
~- arrangement of the clamping means.
The clamping portions arranged in the annular array permits the jaws to be inserted omnidirectionally `~ relative to the axis of the tube flaring means. As the forces , generated in the flaring operation in the clamping means com-prise substantially only tensile forces, the clamping - -portions may compri~e a relatively thin wall section. - -The flaring tool of the present invention is extremely economical and simple of construction while yet providing ; the desirable features discussed above.
~ BRIEF DESCRIPTION OF THE DRAWING :-i~ Other features and advantages of the invention will 30 be apparent from the following description taken in connection :
-i with the accompanying drawing wherein:
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FIGURE 1 i.s a side elcvation of a flariny tool embodying the ~nventis-FIGURE 2 is a transverse section tak~n substantiallyalong the line 2-2 of Figure l;
FIGURE 3 is a transverse section taken substantially along the line 3-3 of Figure l;
FIGURE 4 is a rragmentary enlarged diametric section taken substantially.along the line 4-~ of Figure 2;
- FIGURE 5 is a longitudinal section taken substantially . 10 along the line 5-5 of Figure 4;
FIGURE 6 is a transverse section taken substantially along the line 6-6 of Figure 4; and FIGURE 7 is a fragmentary diametric section illus- -: :
trating the mounting of the jaws in the clamping portion of the body member. -~ DESCRIPTION OF TH~, PREFERRED EMBODIMENT
- In the exemplary embodiment of the invention as . disclosed in the drawing, a flaring tool generally designated :~ -~; 10 is shown to comprise a body member 11 defining a yoke por-. .
tion 12 and an annular clamping portion 13. Thus, as seen in ~ Figures 1 and 3, the body member effectively comprises a cup- ;.
shaped member with the clamping portion 13 being provided with :. longitudinal slots 1~ spaced circumferentially about the axis .
15 thereof. Resultingly, the clamping portion effectively ' comprises a plurality of segmentally cylindrical legs 16 de-: pending from the yoke portion 12.
The body member may be formed of a suitable resilient material, such as molded synthetic resin, whereby the clamping :~ portion 13 may be selectiveiy constricted by a band 17 encircling 30 the clamping portion 13. The band may comprise a metal strap -~
having it8 ends 18 secured together and provided with a female ,,~ , .
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threaded el~ment ]~. A rod 20 extends through the overlappcd band ends 18 and is threaded through element 19. The distal end of the rod is provided with a cylindrical head 21 received in a slot 22 of a clamping pad 23 for effecting movement of the pad 23 toward and from the axis 15, as best seen in Figure 6.
The clamping pad may define an inner segmentally cylindrical surface 24 engaging the clamping portion 13 of the body member in opposition to the engagement of band 17, as shown in Figure 6. Thus, as shown, the threading o~ rod 20 inwardly through the element 19 urges the clamping pad 23 against several of the clamping portion legs 16 and concur- ~-- rently pulls the band 17 against the opposite legs 16, to effect a orceful constriction of clamping portion 13 wherein the legs i are deflected radially toward the axis 15.
Reversely, a retrograde threading of rod 20 outwardly , through element 19 causes a withdrawal of the clamping pad 23 from clamping portion 13 to relax the clamping portion. - -~- As shown in Figure 6, the outward movement of clamping pad 23 ~, 20 may be limited by the engagement thereof with element 19 to ~ ;
provide a preselected retraction o~ the clamping means.
The distal end of rod 20 may be provided with a -~
.:, .
~ manual operating handle 25, as shown in Figure 1, for providin~ ~ -j facilitated manual constriction of the clamp~ng means. As -~i further shown in Figure 1, the band 17 is effectively retained in association with body member 11 by a pair of axially spaced shoulders defined by a lug 26, and a distal outturned flange --27 on the clamping portion. The clamping pad may be retained between the flange and a second lug 28 on the clamping portion ,! 30 13 aga~nst axial displacement, as further shown in Figure 4.
The tube end T to be flared is held in the clamping ~ .
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portion 13 by jaws 29 comprisincJ semiannular jaw elements 30 and 31 movably re~in~d in apposed association by a jaw re-tainer 32. As shown in Figure 5, the jaws are provided with radially opening slots 33 slidably receiving the rectilinear side portions 34 of the jaw retainer 32 for adjustable re-tention in the juxtaposed relationship.
Thus, a plurality of jaw pairs 29 may be provided or use with different diameter tubes. The paired jaws are removably installed in the cylindrical space 35 defined by 10 the annular clamping portion 13 and are releasably retained therein by locking shoulders 36 on the clamping portion legs 16 and cooperating shoulder 37 on the cylindrical periphery of the jaws. The shoulders 36 and 37 define segmentally annular shoulders and, thus, the jaw assemblies 29 may be mounted in the clamping portion 13 omnidirectionally, i.e., in any ro-tational position about the axis 15. As shown in Figures 4 and 7, the jaws are preferably beveled so as to ~acilitate spreading of the clamping portion legs 16 against the r~silient s biasing thereof in inserting and removing the jaws from the 20 space 35. As discussed above, during such insertion and re-; moval, the band 17 is disposed in the relaxed arrangement to -permit the necessary expansion of the clamping portion.
The installation of the jaws in the clamping portion 13 and the removal thereof from the clamping portion 13 is facilitated by use of the jaw retainer 32 as a handle as the jaw retainer proj~cts outwardly from the lower end of the clamping portion ~?~ as best seen in Figures 1, 3 and 4.
Further as shc-.~n in Figure 1, the outturned flange 27 on the clamping portion 13 serves as a limit to the insertion of 30 the jaws by the ahutment therewith of the side portions 34 of the jaw retalnex 32.
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To suitably hold the tube end T during the flariny operation, thc tube cnd is ins~rted through the cylindrical space 38 defined by thc jaw pair~ 30 and 31, as shown in : Figure 4. The inner surface 39 defining the space 38 may be suitably formed to provide improved tube gripping, and as shown in Figure 4, is threaded. To effect the desired clamp-ing of the tube end extended through the space 38, the user merely manipulates handle 25 to thread rod 20 through the .
: element 19 thereby constricting the clamping portion 13 as discussed above and, in turn, urging the jaw halves 30 and 31 .
forcibl~ toward each other whereby the gripping surfaces 39 ~ firmly hold the tube end coaxially of axis 15.
.-~ Flaring of the tube end is effected by urging a flar- -;3 ing cone 40 coaxially into the distal end of the tube, as . shown in Figure 5. Flaring cone 40 is carried on the lower end :
of a threaded stem 41 which is threaded to an internally ~i . threaded sleeve 42 secured to yoke 12 o~ the body 11. The .- upper end of the threaded stem 41 may be provided with a handle -~;
43 to effect rotation of the stem and resultant forcible urging o$ the flaxing cone 40 into the held tube end. - -As shown in Figure 4, the flaring cone abuts the body yoke 12 in the retracted position of the flaring cone ~; 80 that insertion of the tube end T through the jaw spa~ce 38 ! ~ into engagement with the cone provides an automatic preselected . . .
s~ positioning of the tube suitable to form the desired flaxe i~ upon subsequent advance of the flaring cone into the tube end, as shown in Figure 5. As will be obvious to those skilled in : the art, the ~aws 29 may be provided with an upper chamfer ~o define a backup means for the flare where the flare is . -~: 30 effected within the jaws rather than in the portion extanding ~ ' ,- - .
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upwardly from the jaws, as shown. The clamping of tube end T
by the above described constriction of the clamping portion 13 effectively positively holds the tube end coaxially with the flaring cone 40 to provide an improved accurate flare while yet permitting the overall flaring tool to be of minimum size.
To further assure accurate alignment of the tube, prevent canting thereof, and ~rovide a balancing of the clamping forces, the internal surface 39 of the jaws is undercut at the lower end 44, as best seen in Figures 4 and 5.
The foregoing disclosure of specific embodiments is illustrative of the broad inventive concepts comprehended -by the invention.
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Claims (35)
1. A tool for flaring a tube end, comprising:
a body member having a yoke portion, and a plurality of opposed, spaced clamping portions extending resiliently from said yoke portion to define a jaw receiving space therebetween;
a pair of jaws in said space having confronting tube engaging concave surfaces defining a flaring axis;
adjustable means for forcibly urging said clamping portions radially inwardly toward said axis thereby to urge said jaws inwardly into holding relationship with a tube disposed therebetween extending coaxially toward said yoke portion; and flaring means adjustably carried by said yoke for coaxially flaring the end of the held tube.
a body member having a yoke portion, and a plurality of opposed, spaced clamping portions extending resiliently from said yoke portion to define a jaw receiving space therebetween;
a pair of jaws in said space having confronting tube engaging concave surfaces defining a flaring axis;
adjustable means for forcibly urging said clamping portions radially inwardly toward said axis thereby to urge said jaws inwardly into holding relationship with a tube disposed therebetween extending coaxially toward said yoke portion; and flaring means adjustably carried by said yoke for coaxially flaring the end of the held tube.
2. The flaring tool of Claim 1 wherein said clamping portions extend from said yoke portion in an annular array, said jaw receiving space between said clamping portions is generally cylindrical and said pair of jaws are segmentally cylindrical; and further characterized by cooperating shoulder means on said clamping portions and jaws for preventing axial movement of the jaws from said space when urged into said tube holding relationship; said clamping portions having a resiliency which is preselected to cause radial separation of said shoulder means as an incident of release of said adjustable means to permit the jaws to be inserted axially into said space and to permit said jaws and the flared tube to be withdrawn axially from said jaw receiving space upon completion of the flaring of the tube end.
3. The flaring tool of Claim 1 or 2 wherein said clamping portions are equiangularly spaced about said axis.
4. The flaring tool of Claim 1 or 2 wherein said flaring means comprises a flaring cone carried on a stem threaded to said yoke portion coaxially of said space.
5. The flaring tool of Claim 2 wherein said adjustable means comprises a band extending about said array of clamping portions and threaded means for adjust-ably drawing said band tightly thereabout.
6. The flaring tool of Claim 1 or 2 wherein said flaring means comprises a flaring cone carried on a stem threaded to said yoke portion coaxially of said space, said flaring cone being retractable to a preselected retracted position spaced from said jaws a distance equal to the tube length suitable to provide the desired flared portion of the flared tube end.
7. The flaring tool of Claim 1 or 2 wherein said flaring means comprises a flaring cone carried on a stem threaded to said yoke portion coaxially of said space, and said tube engaging surfaces of said jaws define sequentially cylindrical surfaces having an enlarged end portion remote from said yoke.
8. A tool for flaring a tube end, comprising:
a body member having a yoke portion, and a plurality of apposed, spaced clamping portions carried by said yoke portion to define a jaw receiving space therebetween;
a pair of jaws in said space having confronting tube engaging concave surfaces defining a flaring axis;
a retainer member defining a pair of opposed Slide portions slidably carrying said jaws for adjustable spacing of said tube engaging surfaces, said retainer member maintaining said jaws in juxtaposed relation-ship for facilitated installation of said jaws in said jaw receiving space;
adjustable means for forcibly urging said clamping portions radially inwardly toward said axis thereby to urge said jaws inwardly into holding relationship with a tube disposed therebetween extending coaxially toward said yoke portion; and flaring means adjustably carried by said yoke for coaxially flaring the end of the held tube.
a body member having a yoke portion, and a plurality of apposed, spaced clamping portions carried by said yoke portion to define a jaw receiving space therebetween;
a pair of jaws in said space having confronting tube engaging concave surfaces defining a flaring axis;
a retainer member defining a pair of opposed Slide portions slidably carrying said jaws for adjustable spacing of said tube engaging surfaces, said retainer member maintaining said jaws in juxtaposed relation-ship for facilitated installation of said jaws in said jaw receiving space;
adjustable means for forcibly urging said clamping portions radially inwardly toward said axis thereby to urge said jaws inwardly into holding relationship with a tube disposed therebetween extending coaxially toward said yoke portion; and flaring means adjustably carried by said yoke for coaxially flaring the end of the held tube.
9. The flaring tool of Claim 8 wherein said spaced clamping portions extend resiliently from the yoke portion in an annular array to define the jaw receiving space therebetween, said jaw receiving space being generally cylindrical and said jaws being segmentally cylindrical;
and further characterized by cooperating shoulder means on said clamping portions and jaws for preventing axial movement of the jaws from said space when urged into said tube holding relationship; the resiliency of said clamping portions being preselected to cause radial separation of said shoulder means as an incident of release of said adjust-able means to permit the jaws to be inserted axially into said space and to permit said jaws and the flared tube to be withdrawn axially from said jaw receiving space upon completion of the flaring of the tube end.
and further characterized by cooperating shoulder means on said clamping portions and jaws for preventing axial movement of the jaws from said space when urged into said tube holding relationship; the resiliency of said clamping portions being preselected to cause radial separation of said shoulder means as an incident of release of said adjust-able means to permit the jaws to be inserted axially into said space and to permit said jaws and the flared tube to be withdrawn axially from said jaw receiving space upon completion of the flaring of the tube end.
10. The flaring tool of Claim 8 or 9 wherein said retainer member is resilient and said jaws are removably mounted on said retainer member.
11. The flaring tool of Claim 8 or 9 wherein said retainer member is formed of a resilient synthetic resin.
12. The flaring tool of Claim 8 or 9 wherein said retainer member comprises a loop member having parallel rectilinear sides defining means for guiding said jaws rectilinearly in providing said variable spacing of the tube engaging surfaces.
13. The flaring tool of Claim 8 or 9 wherein said jaws define oppositely outwardly opening rectilinear slots, and said retainer member defines spaced, parallel, rectilinear guides received in said slots for guiding said jaws rectilinearly in providing said variable spacing of the tube engaging surfaces.
14. The flaring tool of Claim 8 or 9 wherein said flaring means comprises a flaring cone carried on a stem threaded to said yoke portion coaxially of said space, and said tube engaging surfaces of said jaws define sequentially cylindrical surfaces having an enlarged end portion remote from said yoke.
15. The flaring tool of Claim 8 or 9 wherein said retainer member defines a portion projecting substantial.
outwardly from said body for facilitating manual removal of said jaws from said space when desired.
outwardly from said body for facilitating manual removal of said jaws from said space when desired.
16. A tool for flaring a tube end, comprising:
a body member having a yoke portion, and a plurality of apposed, spaced clamping portions extending resiliently from said yoke portion in an array defining a jaw receiving space therebetween;
a pair of jaws in said space having confronting tube engaging concave surfaces defining a flaring axis;
adjustable means for forcibly urging said clamping portions radially inwardly toward said axis thereby to urge said jaws inwardly into holding relationship with a tube disposed therebetween extending coaxially toward said yoke portion, said adjustable means including a band and means for drawing said band tightly about said array of body member clamping portions, said body defining a pair of spaced shoulders retaining said band against displacement parallel to said axis;
and flaring means adjustably carried by said yoke for coaxially flaring the end of the held tube.
a body member having a yoke portion, and a plurality of apposed, spaced clamping portions extending resiliently from said yoke portion in an array defining a jaw receiving space therebetween;
a pair of jaws in said space having confronting tube engaging concave surfaces defining a flaring axis;
adjustable means for forcibly urging said clamping portions radially inwardly toward said axis thereby to urge said jaws inwardly into holding relationship with a tube disposed therebetween extending coaxially toward said yoke portion, said adjustable means including a band and means for drawing said band tightly about said array of body member clamping portions, said body defining a pair of spaced shoulders retaining said band against displacement parallel to said axis;
and flaring means adjustably carried by said yoke for coaxially flaring the end of the held tube.
17. The flaring tool of Claim 16 wherein said array is annular, said jaw receiving space between said clamping portions is generally cylindrical and said pair of jaws are segmentally cylindrical; and further characterized by cooperating shoulder means on said clamping portions and jaws for preventing axial movement of the jaws from said space when urged into said tube holding relationship; said clamping portions having a resiliency which is preselected to cause radial separation of said shoulder means as an incident of release of said adjustable means to permit the jaws to be inserted axially into said space and to permit said jaws and the flared tube to be withdrawn axially from said jaw receiving space upon completion of the flaring of the tube end.
18. The flaring tool of Claim 16 or 17 wherein one of said shoulders is defined by a lug on one of said clamping portions adjacent said yoke portion.
19. The flaring tool of Claim 16 or 17, wherein one of said shoulders is defined by an outturned flange on the distal end of said clamping portions.
20. A tool for flaring a tube end, comprising:
a body member having a yoke portion, and a plurality of apposed, spaced clamping portions extending resiliently from said yoke portion in an array defining a jaw receiving space therebetween;
a pair of jaws in said space having confronting tube engaging concave surfaces defining a flaring axis;
adjustable means for forcibly urging said clamping portions radially inwardly toward said axis thereby to urge said jaws inwardly into holding relationship with a tube disposed therebetween extending coaxially toward said yoke portion, said adjustable means including a band extending about said array of body member clamping portions, and means for adjustably drawing said band tightly thereagainst including a pressure-applying portion engaging at least one of said body member clamping portions, a threaded portion threadedly connected to said band and adjustably forcibly urging said pressure-applying portion against said body member clamping portions and concurrently drawing said band toward said pressure-applying portion to forcibly constrict said array; and flaring means adjustably carried by said yoke for coaxially flaring the end of the held tube.
a body member having a yoke portion, and a plurality of apposed, spaced clamping portions extending resiliently from said yoke portion in an array defining a jaw receiving space therebetween;
a pair of jaws in said space having confronting tube engaging concave surfaces defining a flaring axis;
adjustable means for forcibly urging said clamping portions radially inwardly toward said axis thereby to urge said jaws inwardly into holding relationship with a tube disposed therebetween extending coaxially toward said yoke portion, said adjustable means including a band extending about said array of body member clamping portions, and means for adjustably drawing said band tightly thereagainst including a pressure-applying portion engaging at least one of said body member clamping portions, a threaded portion threadedly connected to said band and adjustably forcibly urging said pressure-applying portion against said body member clamping portions and concurrently drawing said band toward said pressure-applying portion to forcibly constrict said array; and flaring means adjustably carried by said yoke for coaxially flaring the end of the held tube.
21. The flaring tool of Claim 20 wherein said array is annular, said jaw receiving space between said clamping portion is generally cylindrical and said pair of jaws are segmentally cylindrical; and further characterized by cooperating shoulder means on said clamping portions and jaws for preventing axial movement of the jaws from said space when urged into said tube holding relationship; said clamping portions having a resiliency which is preselected to cause radial separation of said shoulder means as an incident of release of said adjustable means to permit the jaws to be inserted axially into said space and to permit said jaws and the flared tube to be withdrawn axially from said jaw receiving space upon completion of the flaring of the tube end.
22. The flaring tool of Claim 20 or 21 wherein said pressure-applying portion comprises a pad having an inner surface engaging said clamping portion, and an outer slot opening parallel to said axis, and said threaded portion includes a male threaded member having a head rotatably received in said slot for moving said pad radially of said axis as an incident of threaded rotation of said threaded member.
23. The flaring tool of Claim 20 or 21 wherein said pressure-applying portion comprises a pad having an inner surface engaging said clamping portion, and an outer slot opening parallel to said axis and having a closed end, and said threaded portion includes a male threaded member having a head rotatably received in said slot for moving said pad radially of said axis as an incident of threaded rotation of said threaded member, said slot closed end preventing movement of said head outwardly from the slot therethrough.
24. The flaring tool of Claim 20 or 21 wherein said pressure-applying portion comprises a pad having an inner surface engaging said clamping portion, and an outer slot opening parallel to said axis, said threaded portion includes a male threaded member having a head rotatably received in said slot for moving said pad radially of said axis as an incident of threaded rotation of said threaded member, and said body member includes spaced shoulders retaining said pad against displacement parallel to said axis.
25. The flaring tool of Claim 20 or 21 wherein said pressure-applying portion comprises a pad having an inner surface complementary to the outer surface of said body member clamping portions to have facial engagement therewith.
26. The flaring tool of Claim 20 or 21 including means for limiting the movement of said pressure-applying portion away from said body member clamping portions to define a preselected retracted arrangement of said adjustable means permitting removal of said jaws from said space.
27. A tool for flaring a tube end, comprising:
a body member having a yoke portion, and a plurality of apposed, spaced clamping portions extending resiliently from said yoke portion in an annular array about a central axis to define a jaw receiving space therebetween;
a pair of jaws in said space having confronting tube engaging concave surfaces defining a flaring axis;
adjustable means for forcibly urging said clamping portions radially inwardly toward said axis thereby to urge said jaws inwardly into holding relationship with a tube disposed therebetween extending coaxially toward said yoke portion; and flaring means adjustably carried by said yoke for coaxially flaring the end of the held tube.
a body member having a yoke portion, and a plurality of apposed, spaced clamping portions extending resiliently from said yoke portion in an annular array about a central axis to define a jaw receiving space therebetween;
a pair of jaws in said space having confronting tube engaging concave surfaces defining a flaring axis;
adjustable means for forcibly urging said clamping portions radially inwardly toward said axis thereby to urge said jaws inwardly into holding relationship with a tube disposed therebetween extending coaxially toward said yoke portion; and flaring means adjustably carried by said yoke for coaxially flaring the end of the held tube.
28. The flaring tool of Claim 2 or 27 wherein said adjustable means engages said clamping portions substantially fully about the circumferential extent of said array.
29. The flaring tool of Claim 2 or 27 wherein said jaws define segmentally cylindrical outer surfaces permitting omnidirectional disposition of said jaws in said space.
30. The flaring tool of Claim 2 or 27 wherein said clamping portions comprise thin wall elements.
31. The flaring tool of Claim 2 or 27 wherein said clamping portions comprise thin wall elements formed integrally with said yoke portion.
32. The flaring tool of Claim 2 or 27 wherein said clamping portions comprise thin wall elements having an outturned distal flange.
33. The flaring tool of Claim 27 including means for releasably locking said jaws to said clamping portions.
34. The flaring tool of Claim 27 including means for releasably locking said jaws to said clamping portions comprising cooperating shoulder means on said jaws and clamping portions, the resiliency of said clamping portions permitting selective release of said locking shoulder means.
35. The flaring tool of Claim 27 including means for releasably locking said jaws to said clamping portions comprising cooperating segmentally annular shoulder means on said jaws and clamping portions for releasably locking said jaws and said clamping portions omnidirectionally about said axis.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US487435A US3913364A (en) | 1974-07-11 | 1974-07-11 | Flaring tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1041888A true CA1041888A (en) | 1978-11-07 |
Family
ID=23935718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA224,244A Expired CA1041888A (en) | 1974-07-11 | 1975-04-09 | Flaring tool |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3913364A (en) |
| JP (1) | JPS5111056A (en) |
| BR (1) | BR7504393A (en) |
| CA (1) | CA1041888A (en) |
| DE (1) | DE2523241A1 (en) |
| GB (1) | GB1442123A (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5358453A (en) * | 1976-11-08 | 1978-05-26 | Hitachi Shipbuilding Eng Co | Automatic control method of welding condition by density difference of welding bead surface |
| JPS5381452A (en) * | 1976-12-28 | 1978-07-18 | Yanagawa Seiki Co Ltd | Device of detecting welded condition |
| FR2507114A1 (en) * | 1981-06-09 | 1982-12-10 | Elf Aquitaine | COLLET FORMING MACHINE FOR IMMERSION PIPES |
| US4477712A (en) * | 1982-04-26 | 1984-10-16 | General Electric Company | Arc-welding seam-tracking applications employing passive infrared sensors |
| JPS59178178A (en) * | 1983-03-29 | 1984-10-09 | Toshiba Corp | Inspecting method of arc welding |
| US4779441A (en) * | 1983-04-15 | 1988-10-25 | Pringle William L | Tube having a flared end |
| JPS59194334U (en) * | 1983-06-09 | 1984-12-24 | 株式会社 京浜自動制御 | flaring tool |
| AU2792284A (en) * | 1983-07-26 | 1985-01-31 | Papco Corp. | Hand tool for tube-flaring and similar |
| DE3643727C2 (en) * | 1986-11-03 | 1996-09-05 | Foell Remswerk | Pipe widening device |
| US4813260A (en) * | 1987-04-27 | 1989-03-21 | Clevite Industries Inc. | Multipurpose tube working tool |
| JP2834264B2 (en) * | 1990-03-15 | 1998-12-09 | レッキス工業株式会社 | Electric flare tool |
| US5158433A (en) * | 1991-01-21 | 1992-10-27 | Brunswick Corporation | Marine propeller having an outwardly flared hub |
| GB9500862D0 (en) * | 1995-01-17 | 1995-03-08 | Sykes Pickavant Ltd | Improvements in and relating to tools |
| GB2371253B (en) * | 2000-08-10 | 2004-04-14 | Mechatronic Production Systems | Improvements in pipe shaping |
| GB0221398D0 (en) | 2002-09-16 | 2002-10-23 | Smart Tools Ltd | Automatic pipe flaring tool |
| GB0424885D0 (en) * | 2004-11-11 | 2004-12-15 | Weatherford Uk Ltd | Reaming apparatus |
| DE102010037392B4 (en) * | 2010-08-26 | 2012-03-29 | Julius Mayerhofer | Beading press for fluid lines, setting aid for a flanging press and method for producing a flanging |
| US8887543B2 (en) * | 2011-01-03 | 2014-11-18 | Horizon Tool Inc. | Tube flaring tool |
| US9044804B2 (en) * | 2012-06-11 | 2015-06-02 | Harry P. Rieger | Corrugated tubing compression tool |
| CN106694598A (en) * | 2016-12-22 | 2017-05-24 | 湖南南方宇航工业有限公司 | Reaming work fixture |
| US10940521B2 (en) | 2017-06-29 | 2021-03-09 | Milwaukee Electric Tool Corporation | Swage tool |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US859644A (en) * | 1907-07-09 | Cummings Machine Company | Threading-tool. | |
| US1018910A (en) * | 1911-04-20 | 1912-02-27 | James C Kahle | Temper-screw. |
| US2132947A (en) * | 1936-06-06 | 1938-10-11 | Snap On Tools Inc | Tube flaring device |
| US3411796A (en) * | 1966-06-17 | 1968-11-19 | John A. Decker | Workpiece gripping bushing |
-
1974
- 1974-07-11 US US487435A patent/US3913364A/en not_active Expired - Lifetime
-
1975
- 1975-04-07 GB GB1422475A patent/GB1442123A/en not_active Expired
- 1975-04-09 CA CA224,244A patent/CA1041888A/en not_active Expired
- 1975-05-26 DE DE19752523241 patent/DE2523241A1/en not_active Withdrawn
- 1975-06-12 JP JP50071414A patent/JPS5111056A/en active Pending
- 1975-07-10 BR BR7504393*A patent/BR7504393A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US3913364A (en) | 1975-10-21 |
| GB1442123A (en) | 1976-07-07 |
| DE2523241A1 (en) | 1976-01-29 |
| JPS5111056A (en) | 1976-01-28 |
| BR7504393A (en) | 1976-07-06 |
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