CA2084567A1 - Fastener assembly with integral anti-rotation device - Google Patents
Fastener assembly with integral anti-rotation deviceInfo
- Publication number
- CA2084567A1 CA2084567A1 CA002084567A CA2084567A CA2084567A1 CA 2084567 A1 CA2084567 A1 CA 2084567A1 CA 002084567 A CA002084567 A CA 002084567A CA 2084567 A CA2084567 A CA 2084567A CA 2084567 A1 CA2084567 A1 CA 2084567A1
- Authority
- CA
- Canada
- Prior art keywords
- flange portion
- blank
- fastener
- counterbore
- rotation device
- 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.)
- Abandoned
Links
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000013011 mating Effects 0.000 abstract 1
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 description 22
- 241000905957 Channa melasoma Species 0.000 description 2
- 241000353097 Molva molva Species 0.000 description 2
- 241000405965 Scomberomorus brasiliensis Species 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 101100439253 Arabidopsis thaliana CHI3 gene Proteins 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 241000024109 Spiris Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001080024 Telles Species 0.000 description 1
- 244000221110 common millet Species 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007775 late Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B27/00—Bolts, screws, or nuts formed in integral series but easily separable, particularly for use in automatic machines
Abstract
PATENT APPLICATION PAPERS
OF
CHARLES F. SCHULTZ
FOR: FASTENER ASSEMBLY WITH INTEGRAL ANTI-ROTATION DEVICE
ABSTRACT OF THE DISCLOSURE
A method of forming a fastener assembly, such as a stud or insert, having an integral anti-rotation device. A cylindrical blank is first operated on such that an angularly, cup shaped flange portion is formed thereon. The blank is then forced through a die, the flange portion to being forced to a position substantially parallel to the longitudinal axis of the blank and to simultaneously form serrations thereon thus producing an anti-rotation type device. After thermal treatment, threads are form on the blank and the blank is then coated or plated in a conventional manner. The length of the anti-rotation device is longer than the length of the mating counterbore in the parent material by a predetermined amount. The fastener is then screwed into the parent material cavity until the anti-rotation device shoulder bottoms in the counterbore. A drive tool places a downward force on the fastener swaging or collapsing the serrated portion of the device and forcing it into the parent material thus locking the fastener against rotational or torsional forces.
OF
CHARLES F. SCHULTZ
FOR: FASTENER ASSEMBLY WITH INTEGRAL ANTI-ROTATION DEVICE
ABSTRACT OF THE DISCLOSURE
A method of forming a fastener assembly, such as a stud or insert, having an integral anti-rotation device. A cylindrical blank is first operated on such that an angularly, cup shaped flange portion is formed thereon. The blank is then forced through a die, the flange portion to being forced to a position substantially parallel to the longitudinal axis of the blank and to simultaneously form serrations thereon thus producing an anti-rotation type device. After thermal treatment, threads are form on the blank and the blank is then coated or plated in a conventional manner. The length of the anti-rotation device is longer than the length of the mating counterbore in the parent material by a predetermined amount. The fastener is then screwed into the parent material cavity until the anti-rotation device shoulder bottoms in the counterbore. A drive tool places a downward force on the fastener swaging or collapsing the serrated portion of the device and forcing it into the parent material thus locking the fastener against rotational or torsional forces.
Description
~'EC Q3 'g~ 17::3g FRIRCHILD F~ IEI~ER F~.~'17 , ~
~ OUNr~ OF ~ INVE:~TTION
1. Field o~ ~he .Inv. en1:1on Th~ present invention rela~s to f~ eners ~.71th inteyral an~i-rotation devices ln~:alled in a ~at~ri~l and which c:oopera~es t~ith another ~asten~r to hold obj ects to ~he m~erial .
~ OUNr~ OF ~ INVE:~TTION
1. Field o~ ~he .Inv. en1:1on Th~ present invention rela~s to f~ eners ~.71th inteyral an~i-rotation devices ln~:alled in a ~at~ri~l and which c:oopera~es t~ith another ~asten~r to hold obj ects to ~he m~erial .
2. ~s~Q~9~
In order ~o prevent vi~rational ~orces, su¢h as tho ~ produced ~y hig~ per~o~anc~ ~ircraft ~n~ines, ~rom lvosening in~talled Ctuds o~ inserts ll'cilized 1co h~ld o~e~ in place, the prior art has devised a num~er of solu~ion~ utilizing locking rings .
U.S. Pat~n~ No, 2,~7~,810 to Ro~an di~close~ ~n ingert which includes an annular locking head }laving ~rrations at one end, ~e insert bein~ installed in ~ co~m~exbored tapped hole fo~ed in a paren~ material. An ~xp~nding ~ool expands ~he locXing head, or portions thereo~, which i~ expanded r~dially outward to em~e~ the serra~ions in ~he parent material, thereby locking the insert t~reto .
U.S. P~ent No. 3,7~0,969 to Ro~n et al discloses a ~tud fast~ner asse~ly h~ving both end5 thxeaded, a locXing rin~ b~ing slipped on~o the stud ~a~ener a~tsr on~ end i~; threaded bu~ be~ore the other end is threaded, the locXing ring b~n~ captivated to the ~as~ene~ asse~bly.
U.S. Pat~nt No. 4,5~8,2Z8 to Rosan disclose~ a ~a~en~r ha~ring an attached locking ring, t;he fa~t~ner being ~nu~actur~d wi~h the locking ring attached the~eto by ~e~ ab~ or a metal strip o~ the same p~xent material a~. the ~a~tener~ Apparently, ~he ~kud, in~ert and locking rings are ml~nu~ctured separ~ly, ~ut jo~ned togs~her DE~ ~13 '~2 17:40 F~IF~CHIL~ F~J',TEI~EF~ P.7/17 C~ ; r8~
at th~ ti~ ~he irlæer~/s~ud is m~nu~Rc~ure~ to a~oi~ ~epin~ tr~ck of separate locking rings.
ddition, the pr~blem of keeping track o~ s~p~r~te loc~cing rings, as rloted i~ the ~ 22~ p~en~, du~ing~ ths stud and insert manu~açtu~ing proc~ss increa~es the ços~s associ~ted therewi~h.
~ hat i5 ~h~-~e~re cleglre~ is to provid~ a ~skener a~se~bly wherein the ~ocking r~g i8 for~ned as part o~ the tud/inser~
~anufaç~ring proce~.
r!EC ~3 '~2 17:40 FhIRCHIL~ Fh',TEllE~ P,8/17 ~ ~ 3 ~
~SU~Y ~ P~;~sENT INVEN~I~
The present in~enl;ion r~lates to a me~hod o~ forming a fas~erler having an in~egral an~i-rotation de~lc:e which ~unc'cions as a prior art locking ~ g. A cylindrical blar~ i~ ~irst ~orraed ha~in~ ~n ~n~ll~rly, cup shaped ~lar~ge portion thereorl. ~he ~ X
is ther~ ~or~ed through a die to force ~he f lar~ge p~rtion to a posi~ion sub~tantially p~allel to ~he longi~udln~l ~xis of the blan~ ~nc9. to simul~aneo~ly ~orm serra~ions the~eon to ~or~ an a.nti-ro~a~ion device. A~ter the~l tre~ment, thr~d~ ~r~ ~orm~d on ~he blank, the ~l~n3c th~r~a~ter b~ing ~oat~d or pla~ed in a conventional ~anner. The length o~ the device i~ longer th~n ~he leng~h o~ ~he ~ing count~rbore in th~ parent ~aterial ~y ~
predetermin~d a~oun~ The fast~ner is then ~c~ewed in~o th~ parent ma~exi~l cavi~y until the de~i~e sh~ulder botto~ in the ~ounterbore. ~ drive too} pla~es a do~nward for~e ~ the ~astener, swaging or coll~psing the serrated portlon of ~h d~vice ~nd ~or~ing i~ in~o the p~rent m~tsrial thus lsc~ing the fas~ener again~t xotational, ox torsional, for~es.
T~e p~esen~ invention ~hus provides a me~hod ~or providing inserts or s~uds ha~ing integral devices which ~unctisn as looki~g ~ings, thus r~ducing the overall m~nufacturing ~nd shipping ca~ts of the f~stener ~s~bly ~nd eliminating the neces8i~y of keepiny track af ~parate lo¢~ing ring~.
pEs~ L_ a~ nB~EI~c For ~ ~etter understandin~ o~ tha inven~ion a~ well as other ob~ects and ~r~her ~ea~u~es ~h~reof, ~e~eren~e is mad~ he I)EC 13:~ '9Z 17: 4EI F~IRCHIL~ F~';rE~EF~ P, ~/17 2 ~ t r '; J~
~oll ing description which is to he read in conjunctibn with ~he accompanying drawing wherein:
~ igure 1 is a p~rspective view o~ the n~vel stud a~tener of the present invention;
Figures 2A-2~ ~nd 3A~3~ s~w the various steps utilized to ~nan~lf~cture the ~tene~ a~sem~7Ly o~ the presen~ ~ nvention, Figure 4 illustr~te:3 the s~ud version o~ ~he f~stener assemhly of the pr~ent invention;
Figure 5 illustrat~ ~he i~i'cial ins~al~tion o ~he s~ud o~
the pr~sent invention into a parent ~e~ atld Figure 6 illustrates khe installation ~er ~he ~nki-rotation devic~ is swaged into the parent material.
DE5~RI_ ~ e~erring now ~o ~igure 1, a p~rspective vie~ of a nov~l fastener assembly 10~ and ln p~r~icular a stud~ showing the integral anti-rotation device 12 o~ ~he present invention is illus~r~te~. The stlld lO ~omprises a ~irst ~hre~ded po~ion 1" a second threade~ por'cion 1~, por~iorl 16 being typical~y ~hort~r ~han portion 14, and de~fice 12 intexposed between po~ions 14 and l~.
~ eferring now to Figur~s 2A-2C, a headed blan3~ 20, pre~erably ~onned of stainle~s steel bar (w~re) au~ o~ to a desi~ed length, is ~o~ned using ~onventional techni~ues. ~he blan3c 20 includes ~irst and se~ond portions 22 and 24, resp~c~ully, nose portions 25 and 27 and an ans~led cup-æhaped ~l~nge port:ion 26~ approximat:ely ~ormed. Both the 3~1~nd ~nd ~lange portioll 2~ a~e Pormed on a cold heading machi~e. It ~houlcl be noted that other p~oce~ses can be used, such as ~crew ~n~chines, but cold heading ls pre~erred since less ma~erial i~ utilized. As shown moxe clearly in the detail o~
- B -DEi 133 '~1~ 17-41 FQIR~:HILD F~ISTEI~ER F'. ll~V17 .
Fi~u~e 2C, the outw~rdly ~xtendin~ por~lon 28 ~c:)no~ an angl e with ~he longi~udinal ~xi~i 30 of ~lan3c 20. As will b~ set ~or~h herein~f~er in more ~tail, cul~-sh~p~d flange p~tion ~, in~e~
with portion~ 14 and 16, i~3 ~tiliz~d to form a co~ponqn~ whic~h fu~cti~s identically ~.o prior art, ~eparately ~ormed, locking ring:i . Fo~ ~he purpose~ hereto f i~u~es the ter~ "cup-e!haped" as shown in the ~iqures me~L~s a cylindr~ ¢al d~ s3c ~e~er h~lng their upwardly ex~ending wall~ s~ h ~hat a 2:ubstan~ial porti~n o~ the ~lange interior is devoi~ o~ makeria~..
~ ypic~l di~nen~ion~ ~or the headed ~lank shown in Figure 2~ are a~ ~ollow~ (di~ension~ ~Lre in inches):
A ~ ~ ,1~6 B = .~ I, ~
C = . 3~0 dia:~e~er ~e~or~ serration or knurling ~per~'~;ion) D = . 2207 to . ~17 E ~ 0 to . ~270 0<= .5 ~eq~e~
Figure ~C i~ a detail 0~ khe cup~shap~d ~lange portlon 26, 'ch~
typical dimen~ions ~her~3~ox being as ~ollows:
R = . 042 S 3 .020 'r - . 0~5 ~adiu~
W= .010 r~d.lu~
The f lan~e ~ngle, t~pically in the range b~tween O and 30 ~egrees, is selec~ed to ~tch the angle in the coun~erbo~ o~ the I~EC ~13 '92 17:41 Ff~ CHILr) F~S-rEllEF~ 3 ~ ~` '` 7 parent a~ateri~ his will autom~ ally se~ the proper height ~bove the surfac:e o~ ~he paren~ ~a~erlal hefor~ ;Lnstallatiorl.
Figure3 3A~3B show ~he next steps o~ th~ process. ~n par~iculax, the blank ~0 is pas~ed ~hxough a ~ond die ~n ~ manner ~uch ~h~t cup sh~ped fla~ge po~tion ~6 ia forced to ~ pogi~ion such th~t the outer cylindric~1 cup o~ ~;hell por~ion i~; sub~i~anti~lly parallel to axis 30 o~ nk 20 ( in t;he c:a~e wh~re ~. i~ oth~r than zero degrees ) ~ In addition, ~er:ra~ions ~ teeth ) 3 ~ are f ormed on ~he ~:i~ exterior suri~ac:es o~ portlon 26 as illustra .ed, thus ~o~ing d~vice 12. Th~eads are ther~ ~or1ned on portion ~4 by ~h~ead ~olling technigues. Thread~ are t~en formed on por~iorl 16 as close ~s poss ible to shoulder 3 4 as shown in Figure 4 . I~
should b~: note~ ~ha~ the heat ~rea~mer~t and cleaning steps normall~
co~pleted befo~e thread rolling and the cleaning, ~inishing and/or plating s~eps ater ~h~e~d rolling are c:onven~ional and thus ha~
not l:een de~cribed~ ~he ~a ~en~r 10 shown in Figu~es 1 3nd 3A (~
stud i~ illustrated) i~; ~ormed in accordance wi~h t}~e teachings o~
the p;resent in~en~ion with ~he ~ormed portion, or d~vice, 12 corresponding to a ~andard loo~ing ring With 1:~18 ~xceptlon that t~e lc:cking ring i5 now in~egral ~ith the xemaining portions o~ the stud whexeas the prior art locking rings are ~eparatel~ for~ed. In addition, ~evica lZ has a deep annul~r channel, or groove, 37 whereas ~onventional locking rings ar~ shaped as a solid ~ excep~
for an aperture allowin~ ~he locking rlng to move on ~he inser~ or stud) thus requiring more ~a~tal ma~rial ~or it~: ~abric~ion.
Figure 5 shows the f inally foxmed stud o~ Fl~ure 4 installed in paren~ mat~rial 40~ The leng'ch o~ ~e locking ring portion o~
, - :
, , ;
:
rl_ ~3 '~1~ 17:42 FflIF~CHILD F~'~TEI`IER P. 1~/17 the s~ud is gre~ter than the length of coun~erbore 4~ ~ormed in material 4C by a predetermined amount. ~rhe stud is first 5cr~w~d into the par~n~- matexia.l hole until the locking ring sho~lder 34 ~ot~oms in the counterbor~ ~2. ~ drive ~ool ~ (shown in Fig. 6j having an ~nteg~al ~ dri~al por~ion 4~ is posi~io~ed ~ver ~he stud in ~ m~ner such that por~ion 46 ~ontac~s the cylindri~l portion o~ device 12. A downward ~orce is applied and ~he cylindrical portion o~ dev~c~ 12 is sw~g~d (coll~pses) and ~he serrations th~reon are for~ed into the surrounding p~rent material V~ t~e counterbore 42 as shown in Figure 6 ~hus lo~king ~he fas~ene~ ag~inst ro~tional (torsion~ orc~s.
The present invention thus provides an improved in~ert ~nd stud wher~in a device f~ctioning as a looXiny ring ~s integr~l therewith ~hus reducing manu~acturing cos~ and more importantly, eli~inating the inconvenlence and handl~ng cost5 0~ locating `separately formed locking rings and matinq them with ~heir associated insert oX stUd~
While the i~ven~ion ~a~ ~een desc~ibed with reference to itS
pr~ferred embodimen~s, it will be understovd by ~ho~e skilled in the a~ that va~ious changes may ba made and egui~alents made be subs~i~uted ~or element~ ther~o~ without depa~ing ~rom th~ true spiri~ and s~ope of the invention. In add~tion, ~an~ modiPications may be ~ade to adapt a ~articular situa~ion o~ ~ateri~ the teachings o~ the inven~iun wi~h~ut departing from its essential teachin~.
In order ~o prevent vi~rational ~orces, su¢h as tho ~ produced ~y hig~ per~o~anc~ ~ircraft ~n~ines, ~rom lvosening in~talled Ctuds o~ inserts ll'cilized 1co h~ld o~e~ in place, the prior art has devised a num~er of solu~ion~ utilizing locking rings .
U.S. Pat~n~ No, 2,~7~,810 to Ro~an di~close~ ~n ingert which includes an annular locking head }laving ~rrations at one end, ~e insert bein~ installed in ~ co~m~exbored tapped hole fo~ed in a paren~ material. An ~xp~nding ~ool expands ~he locXing head, or portions thereo~, which i~ expanded r~dially outward to em~e~ the serra~ions in ~he parent material, thereby locking the insert t~reto .
U.S. P~ent No. 3,7~0,969 to Ro~n et al discloses a ~tud fast~ner asse~ly h~ving both end5 thxeaded, a locXing rin~ b~ing slipped on~o the stud ~a~ener a~tsr on~ end i~; threaded bu~ be~ore the other end is threaded, the locXing ring b~n~ captivated to the ~as~ene~ asse~bly.
U.S. Pat~nt No. 4,5~8,2Z8 to Rosan disclose~ a ~a~en~r ha~ring an attached locking ring, t;he fa~t~ner being ~nu~actur~d wi~h the locking ring attached the~eto by ~e~ ab~ or a metal strip o~ the same p~xent material a~. the ~a~tener~ Apparently, ~he ~kud, in~ert and locking rings are ml~nu~ctured separ~ly, ~ut jo~ned togs~her DE~ ~13 '~2 17:40 F~IF~CHIL~ F~J',TEI~EF~ P.7/17 C~ ; r8~
at th~ ti~ ~he irlæer~/s~ud is m~nu~Rc~ure~ to a~oi~ ~epin~ tr~ck of separate locking rings.
ddition, the pr~blem of keeping track o~ s~p~r~te loc~cing rings, as rloted i~ the ~ 22~ p~en~, du~ing~ ths stud and insert manu~açtu~ing proc~ss increa~es the ços~s associ~ted therewi~h.
~ hat i5 ~h~-~e~re cleglre~ is to provid~ a ~skener a~se~bly wherein the ~ocking r~g i8 for~ned as part o~ the tud/inser~
~anufaç~ring proce~.
r!EC ~3 '~2 17:40 FhIRCHIL~ Fh',TEllE~ P,8/17 ~ ~ 3 ~
~SU~Y ~ P~;~sENT INVEN~I~
The present in~enl;ion r~lates to a me~hod o~ forming a fas~erler having an in~egral an~i-rotation de~lc:e which ~unc'cions as a prior art locking ~ g. A cylindrical blar~ i~ ~irst ~orraed ha~in~ ~n ~n~ll~rly, cup shaped ~lar~ge portion thereorl. ~he ~ X
is ther~ ~or~ed through a die to force ~he f lar~ge p~rtion to a posi~ion sub~tantially p~allel to ~he longi~udln~l ~xis of the blan~ ~nc9. to simul~aneo~ly ~orm serra~ions the~eon to ~or~ an a.nti-ro~a~ion device. A~ter the~l tre~ment, thr~d~ ~r~ ~orm~d on ~he blank, the ~l~n3c th~r~a~ter b~ing ~oat~d or pla~ed in a conventional ~anner. The length o~ the device i~ longer th~n ~he leng~h o~ ~he ~ing count~rbore in th~ parent ~aterial ~y ~
predetermin~d a~oun~ The fast~ner is then ~c~ewed in~o th~ parent ma~exi~l cavi~y until the de~i~e sh~ulder botto~ in the ~ounterbore. ~ drive too} pla~es a do~nward for~e ~ the ~astener, swaging or coll~psing the serrated portlon of ~h d~vice ~nd ~or~ing i~ in~o the p~rent m~tsrial thus lsc~ing the fas~ener again~t xotational, ox torsional, for~es.
T~e p~esen~ invention ~hus provides a me~hod ~or providing inserts or s~uds ha~ing integral devices which ~unctisn as looki~g ~ings, thus r~ducing the overall m~nufacturing ~nd shipping ca~ts of the f~stener ~s~bly ~nd eliminating the neces8i~y of keepiny track af ~parate lo¢~ing ring~.
pEs~ L_ a~ nB~EI~c For ~ ~etter understandin~ o~ tha inven~ion a~ well as other ob~ects and ~r~her ~ea~u~es ~h~reof, ~e~eren~e is mad~ he I)EC 13:~ '9Z 17: 4EI F~IRCHIL~ F~';rE~EF~ P, ~/17 2 ~ t r '; J~
~oll ing description which is to he read in conjunctibn with ~he accompanying drawing wherein:
~ igure 1 is a p~rspective view o~ the n~vel stud a~tener of the present invention;
Figures 2A-2~ ~nd 3A~3~ s~w the various steps utilized to ~nan~lf~cture the ~tene~ a~sem~7Ly o~ the presen~ ~ nvention, Figure 4 illustr~te:3 the s~ud version o~ ~he f~stener assemhly of the pr~ent invention;
Figure 5 illustrat~ ~he i~i'cial ins~al~tion o ~he s~ud o~
the pr~sent invention into a parent ~e~ atld Figure 6 illustrates khe installation ~er ~he ~nki-rotation devic~ is swaged into the parent material.
DE5~RI_ ~ e~erring now ~o ~igure 1, a p~rspective vie~ of a nov~l fastener assembly 10~ and ln p~r~icular a stud~ showing the integral anti-rotation device 12 o~ ~he present invention is illus~r~te~. The stlld lO ~omprises a ~irst ~hre~ded po~ion 1" a second threade~ por'cion 1~, por~iorl 16 being typical~y ~hort~r ~han portion 14, and de~fice 12 intexposed between po~ions 14 and l~.
~ eferring now to Figur~s 2A-2C, a headed blan3~ 20, pre~erably ~onned of stainle~s steel bar (w~re) au~ o~ to a desi~ed length, is ~o~ned using ~onventional techni~ues. ~he blan3c 20 includes ~irst and se~ond portions 22 and 24, resp~c~ully, nose portions 25 and 27 and an ans~led cup-æhaped ~l~nge port:ion 26~ approximat:ely ~ormed. Both the 3~1~nd ~nd ~lange portioll 2~ a~e Pormed on a cold heading machi~e. It ~houlcl be noted that other p~oce~ses can be used, such as ~crew ~n~chines, but cold heading ls pre~erred since less ma~erial i~ utilized. As shown moxe clearly in the detail o~
- B -DEi 133 '~1~ 17-41 FQIR~:HILD F~ISTEI~ER F'. ll~V17 .
Fi~u~e 2C, the outw~rdly ~xtendin~ por~lon 28 ~c:)no~ an angl e with ~he longi~udinal ~xi~i 30 of ~lan3c 20. As will b~ set ~or~h herein~f~er in more ~tail, cul~-sh~p~d flange p~tion ~, in~e~
with portion~ 14 and 16, i~3 ~tiliz~d to form a co~ponqn~ whic~h fu~cti~s identically ~.o prior art, ~eparately ~ormed, locking ring:i . Fo~ ~he purpose~ hereto f i~u~es the ter~ "cup-e!haped" as shown in the ~iqures me~L~s a cylindr~ ¢al d~ s3c ~e~er h~lng their upwardly ex~ending wall~ s~ h ~hat a 2:ubstan~ial porti~n o~ the ~lange interior is devoi~ o~ makeria~..
~ ypic~l di~nen~ion~ ~or the headed ~lank shown in Figure 2~ are a~ ~ollow~ (di~ension~ ~Lre in inches):
A ~ ~ ,1~6 B = .~ I, ~
C = . 3~0 dia:~e~er ~e~or~ serration or knurling ~per~'~;ion) D = . 2207 to . ~17 E ~ 0 to . ~270 0<= .5 ~eq~e~
Figure ~C i~ a detail 0~ khe cup~shap~d ~lange portlon 26, 'ch~
typical dimen~ions ~her~3~ox being as ~ollows:
R = . 042 S 3 .020 'r - . 0~5 ~adiu~
W= .010 r~d.lu~
The f lan~e ~ngle, t~pically in the range b~tween O and 30 ~egrees, is selec~ed to ~tch the angle in the coun~erbo~ o~ the I~EC ~13 '92 17:41 Ff~ CHILr) F~S-rEllEF~ 3 ~ ~` '` 7 parent a~ateri~ his will autom~ ally se~ the proper height ~bove the surfac:e o~ ~he paren~ ~a~erlal hefor~ ;Lnstallatiorl.
Figure3 3A~3B show ~he next steps o~ th~ process. ~n par~iculax, the blank ~0 is pas~ed ~hxough a ~ond die ~n ~ manner ~uch ~h~t cup sh~ped fla~ge po~tion ~6 ia forced to ~ pogi~ion such th~t the outer cylindric~1 cup o~ ~;hell por~ion i~; sub~i~anti~lly parallel to axis 30 o~ nk 20 ( in t;he c:a~e wh~re ~. i~ oth~r than zero degrees ) ~ In addition, ~er:ra~ions ~ teeth ) 3 ~ are f ormed on ~he ~:i~ exterior suri~ac:es o~ portlon 26 as illustra .ed, thus ~o~ing d~vice 12. Th~eads are ther~ ~or1ned on portion ~4 by ~h~ead ~olling technigues. Thread~ are t~en formed on por~iorl 16 as close ~s poss ible to shoulder 3 4 as shown in Figure 4 . I~
should b~: note~ ~ha~ the heat ~rea~mer~t and cleaning steps normall~
co~pleted befo~e thread rolling and the cleaning, ~inishing and/or plating s~eps ater ~h~e~d rolling are c:onven~ional and thus ha~
not l:een de~cribed~ ~he ~a ~en~r 10 shown in Figu~es 1 3nd 3A (~
stud i~ illustrated) i~; ~ormed in accordance wi~h t}~e teachings o~
the p;resent in~en~ion with ~he ~ormed portion, or d~vice, 12 corresponding to a ~andard loo~ing ring With 1:~18 ~xceptlon that t~e lc:cking ring i5 now in~egral ~ith the xemaining portions o~ the stud whexeas the prior art locking rings are ~eparatel~ for~ed. In addition, ~evica lZ has a deep annul~r channel, or groove, 37 whereas ~onventional locking rings ar~ shaped as a solid ~ excep~
for an aperture allowin~ ~he locking rlng to move on ~he inser~ or stud) thus requiring more ~a~tal ma~rial ~or it~: ~abric~ion.
Figure 5 shows the f inally foxmed stud o~ Fl~ure 4 installed in paren~ mat~rial 40~ The leng'ch o~ ~e locking ring portion o~
, - :
, , ;
:
rl_ ~3 '~1~ 17:42 FflIF~CHILD F~'~TEI`IER P. 1~/17 the s~ud is gre~ter than the length of coun~erbore 4~ ~ormed in material 4C by a predetermined amount. ~rhe stud is first 5cr~w~d into the par~n~- matexia.l hole until the locking ring sho~lder 34 ~ot~oms in the counterbor~ ~2. ~ drive ~ool ~ (shown in Fig. 6j having an ~nteg~al ~ dri~al por~ion 4~ is posi~io~ed ~ver ~he stud in ~ m~ner such that por~ion 46 ~ontac~s the cylindri~l portion o~ device 12. A downward ~orce is applied and ~he cylindrical portion o~ dev~c~ 12 is sw~g~d (coll~pses) and ~he serrations th~reon are for~ed into the surrounding p~rent material V~ t~e counterbore 42 as shown in Figure 6 ~hus lo~king ~he fas~ene~ ag~inst ro~tional (torsion~ orc~s.
The present invention thus provides an improved in~ert ~nd stud wher~in a device f~ctioning as a looXiny ring ~s integr~l therewith ~hus reducing manu~acturing cos~ and more importantly, eli~inating the inconvenlence and handl~ng cost5 0~ locating `separately formed locking rings and matinq them with ~heir associated insert oX stUd~
While the i~ven~ion ~a~ ~een desc~ibed with reference to itS
pr~ferred embodimen~s, it will be understovd by ~ho~e skilled in the a~ that va~ious changes may ba made and egui~alents made be subs~i~uted ~or element~ ther~o~ without depa~ing ~rom th~ true spiri~ and s~ope of the invention. In add~tion, ~an~ modiPications may be ~ade to adapt a ~articular situa~ion o~ ~ateri~ the teachings o~ the inven~iun wi~h~ut departing from its essential teachin~.
Claims (5)
1. A method of forming a fastener assembly having an integral anti-rotation device comprising the steps of:
providing a cylindrical shaped body of a predetermined length and having a longitudinal axis;
forming a cup-shaped flange portion at a predetermined location along the length of said body;
forming serrations on the outside surface of said flange portion; and forming external threads on a first portion of said cylindrical body below said flange portion.
providing a cylindrical shaped body of a predetermined length and having a longitudinal axis;
forming a cup-shaped flange portion at a predetermined location along the length of said body;
forming serrations on the outside surface of said flange portion; and forming external threads on a first portion of said cylindrical body below said flange portion.
2. The method of claim 1 further including the step of forming external threads on a second portion of said cylindrical bland above said flange portion.
3. The method of claim 1 wherein said flange portion extends outwardly at an angle to said longitudinal axis.
4. The method of claim 3 wherein said flange portion is forced to a position which is substantially parallel to said longitudinal axis as said serrations are being formed.
5. A fastener assembly for connection with a material having a threaded aperture and a counterbore formed therein comprising a cylindrical body having a longitudinal axis including a first threaded portion adapted for engagement with said threaded aperture and a cup-shaped, an integral flange portion positioned adjacent said first threaded portion, said flange portion having a wall of a predetermined thickness. the outside surface of said wall having serrations thereon, said flange being positioned with said aperture such that the bottom of said flange portion is substantially in contact with said counterbore, said flange portion being operable, when forced down in said counterbore, to expand such that said wall portion becomes embedded in the side walls of said counterbore to lock the fastener against rotation.
A.11.A:Schultz
A.11.A:Schultz
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US80291591A | 1991-12-06 | 1991-12-06 | |
| US07/802,915 | 1991-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2084567A1 true CA2084567A1 (en) | 1993-06-07 |
Family
ID=25185074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002084567A Abandoned CA2084567A1 (en) | 1991-12-06 | 1992-12-04 | Fastener assembly with integral anti-rotation device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH05248422A (en) |
| KR (1) | KR930013503A (en) |
| BR (1) | BR9204895A (en) |
| CA (1) | CA2084567A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106255829B (en) * | 2014-03-26 | 2019-05-31 | 株式会社 Ihi | Impeller connection construction and turbo-compressor |
-
1992
- 1992-12-04 CA CA002084567A patent/CA2084567A1/en not_active Abandoned
- 1992-12-05 KR KR1019920023375A patent/KR930013503A/en not_active Application Discontinuation
- 1992-12-07 JP JP4351079A patent/JPH05248422A/en active Pending
- 1992-12-07 BR BR9204895A patent/BR9204895A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05248422A (en) | 1993-09-24 |
| KR930013503A (en) | 1993-07-22 |
| BR9204895A (en) | 1993-06-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |