US1721283A

US1721283A - Swaging machine

Info

Publication number: US1721283A
Application number: US209431A
Authority: US
Inventors: Frank M Ruth
Original assignee: Russell Burdsall and Ward Corp
Current assignee: Russell Burdsall and Ward Bolt and Nut Co; Russell Burdsall and Ward Corp
Priority date: 1927-07-30
Filing date: 1927-07-30
Publication date: 1929-07-16
Anticipated expiration: 1946-07-16

Description

F. M. RUTH 7ZL283 y SWAGING MACHINE Filed July so. 1927 s sheets-sheet 1' 5/ O j f f f4 J f" 37 49 Je. Q

/m/f/VTOP wym Filed July 30, 1927 5 Sheets-Sheet Patented July l, 129.

- crease the diameter, the section of the swaging process,

. tion so that when the thread is rolled it will lframe being omitted. Fi 2 shows o N y .1.721,2831 Ni STATES PATENT oFF-CE.

FRANK M. RUTH, or STERLING, ILLINOIS, .AsSICNOR To RUSSELL, EURDSALL av WARD BOLT a NUT COMPANY, or' PORT CHESTER, NEW YORK, 'A CORPORATION OI' NEW YORK. Y y

swAGINe MACHINE.

Application filed July 30,1927. Serial No. 209,431.

spindle with a blank between one pair of dies.l Fig. 5 is a cross-section on the plane indicated by the dotted .line 5--5v on Fig.

4 showing the rack and pinion for rotating the spindle. Fig. fshows the jawsat the end of the spindle closed upon a blank, and the means `for closing the' jaws. Fig. 7- l shows a plan of the dies and the means for rotating them. Fig. 8 shows the means which Connects the driving. mechanism with the Shafty which carries the cams that raise y and lower and rotate the spindle. Fig. l9

is a front elevation of'a pair of the .dies with portions broken away. Fig. lOiS a top view of `a pair of the dies with portions brokenv away. Fig. 11 shows the face of one of the dies and Fig. 12 shows the face of the t other die .of each. pair. Fig. 13 shows a. blank before it is submitted to the action of this machine. Fig. 14 shows a blank after 75 it has been operated upon in this machine. Fig. 15 shows a lag screw made from one of these blanks. f v With the mechanism headed blank 1 is swaged tatable dies 3 and 4 which elongate and rer d uce the diameter of the section 5 and form thepoint 6, which-section and 'oint-are to be subsequently provided with te thread 7. (Figs. 13-15.) he dies are set v'in 85 pockets in the heads 8 atv the front ends of parallel shafts 9 and 10 that are, mounted in bearingsin the frame 11. The die shafts are provided with intermeshing gears 12 and 13 `so vthat the will rotate in unison 9o and one ofthe shafts has a driving pulley 14 (Fig. 7). The perimeters ofthe dies are formed onarcs concentric withthe axis of the shafts, and the die cavities, one-half of which is in each die of a slet, are similarly 9'5` curved.I Itis preferred, for the purpose of reducing the cost of manufacture and also' to permit the ready substitution of dies i which will formV differently shaped points, to have each die `made of two members, one, 100v 15, containing the curved and semi-circular cavity 16 for swa 'ng the body of the blank and thelother, 1 having a conical 4cavity h18 for forming the point.V (Figs. 9-12.)

The blank 1 is fed to jaws 19 that are detachably fastened to arms 20 which are heldby pivots 21 in an opening in the head 22 at the lower end ofV the spindle 23. The' srpindle is"`lowered, raised, androtated so t This invention 'relates to a machine which is particularly designed for, by a producing pointed lag screw blanks although it is equally adapted for forming Vblanks for other large screws and bolts with pointed or rounded ends.

In the commercial {production of? such screws and bolts in large quantities it is customary to roll the threads rather than cut the threads on the blanks. As the threaded section of the screw should not be larger in diameter than the shank section which :is not threaded, and rolling threads tends to inblank which is to be thus threaded is reduced to less diameter. than the shank sechave the desired diameter. I

vThe object of the present invention is to provide an automatic machine which will rapidly produce pointed lag vscrews and bolt blanks of accurate size and condition to be immediately threaded by a thread rolling machine. 7

In the embodiment of the invention illustrated headed blanks of circular cross-section and slightly' shorter than the finished articles, are fed one at a time to o ened. jaws mounted on the end of ak vertlcally" floating spindle. When ythe. jaws are closed on the blanks the S indle is dropped to lower the end ofthe lank into the path of two pairs of rotatin dies which reduce the section to be. threa ed and point thev end. After one pairof dies has actedon two opposite sides of the blank the spindle lis raised, then rotated 90 and again lowered so that the second pair of ldies will act upon the other sides of the blank and will; reduce 4 it uniformly and.retain its circular crosssection. The spindle isagain' (raised and rotated 90 and the jaws opened to discharge the swagedblank and .receive a fol lowing blank.

Fig. 1 of` the accompanying drawlngsV shows a-planof so much of the mechanism of the machine as is necessary to an understanding of the invention, the machine `illustrated the by two sets of rolarger Scale a section `of t e spindle wit l the blank Carr ng jawsl o ened. Fig. 3 shows a side e evation of t e)spindle and the mechanism for liftin lowering and rotating it and opening t e jaws. Fig. 4 shows. a front elevation of the dies and at first' one set of 110:'

by any suitable means 1o5 l dies and ythen the other set of dies act upon the blank for reducing and pointingthe secraised by a spring 27 that thrusts between a collar 28 in the spindle and a sleeve 29 fastened to the upper end of the rod. (Fig. 2.)

Attached to the lowerend of this rod is a double-wedge 30 that is adapted, as the rod `is raised by the thrust of the spring, to en.-

gage the rolls 25 and spread the upper ends of the' arms and causethe jawsto close as illustrated in Fig.v 6. When the .rod' is forced down against the thrust of the spring its lower end engages the shoulders 24 and 7 causes the jaws to open as illustrated `in Fig.

2. Normally the jaws remain closed under the thrust of the-spring, but when the spindle is raised they are opened for discharging a swaged blank and receiving another, by

the engagement with the screw` 31 threaded into the sleeve attached to the upper end of the rod, of the lower en d of a screw 32 in the front end of a lever-33. (Fig. 2'.) This lever is mounted on a pivot 34 `in the frame and its rear end carries. a roll 35 which is .engaged by a cam 36 on the cam shaft 37. (Fig. 3.) This cam is timed so that the jaws are opened at every alternate rise of the spindle. y

-A collar 38 is fastened to the spindle and engaging with this collar is the forked end of a lever 39 which is mounted on the pivot 40 and hasa roll 41 that is engaged by a cam 42 on the cam shaft 37. This cam is Vshaped to lift the spindle twice during each rotationof the cam shaft. (Fig. 3.)

Splined on the spindle is a gear 43, the

hub of which is rotatably heldin a bearing f in the frame. The spindle is. free to. reciprocate vertically through '.this gear but is rotated thereby. Engaging with the gear is a rack 44. (Fig. 5.) This rack moves horizontally through the frame and at its rear end is connected by a link 45 with an arm 46 that forms a part of the llever 47 which is pivoted at 48 and bears a roll 49` en aged by the cam on the cam shaft. ig. 3.) The'arm 46 is held in engagement with the. lever 47 by a. spring 51, and

the roll 49 on the lever is held against they cam by afsp-ring 52.

This cam 50' is timed so as to, through the lever and rack 'and gear, oscillate the spindle on its axis'90 at each Jupward movement of the spindle. The elastic connection between the armand the lever allows the parts tn yield should any obstruction prevent the spindle from ro' i the axis-of revolution of the dies, mechon one end has a bevel 4 complementary tating.l

The cam shaft r 53 that engages with a bevel gear 54 on t e uplper end of a'vertical shaft 55. (Figs.

After a blank "the spring `blank into the path of the dies.

.up of two members,

a spiral gear 57 on the die shaft 10, (Figs. 7-8), Vwhich through the gears 12, 13 is driven by the pulley 14.-

The cams are so timed that the spindle 23 is raised and the upper end of the rod 26 is engaged by the lever 33 and the jaws 19 opened -bythe lower end of the rod. has been placedfbetween the jaws7 therod in the spindle is lifted by jaws so as to hold theI blank. The spindle then drops, carrying the lower end of the One set of the swaging dies comes around and 'reduces and elongates the blank and at the same time points the end of the blank. After one set of dies has acted on two opposite sides of the blank the spindle is raised and rotated 90 and then allowed .to dropdown in time'forthe second set of dies to engage the blank theylift lthe blank 27 and the wedge 30 closes the and after the blank passes above the dies 'the cam and lever li'ft the spindle still further. -V

By the mechanism described lblanks for ico lag screws and bolts may be swaged very rapidly and produced in condition for subsequently rolling threads upon the swaged and pointed sections.

the members which produce the points can be cheaply made, and different pointing dies with various shapes may be readily substituted for producing the desired ends of the blanks.

The method of swagingv described ac- With each die made curatelyreduces the sections of the blanks which will be increased when vthey are threaded in the thread rolling machine ,and at the same time points the blanks so that they are in condition to be immediately inmachine previously used.

The invention claimed is? 1. A machine for swaging headed each headv carryingv two sets of dies, all of which dies are mounted to revolve in the same vertical plane which is transverse to anism for rotating the f heads s'o that. the dies will coact o'n the-blanks on their upward travel, a 'spindle movable 8.) This vertical shaftat its lower vertically above and toward and from the.

troduced into the thread roller, thus eliminating the use o the independent pointing4 i 12o blanks which comprises apair of rotatable heads,-

' heads,

vthe spindle and adapted to averse/af. l

dies twicel during` each `'rotation yof 'the on each upward movement of the spindle, fingers carried by `grip the blanks by their heads, and mechanism for opening and closing said-fingers on each valternate upward movement of the spindle.

2. A machine for swaging headed blanksv which comprises a pair of rotatablel heads, two sets ofdies that have semi-cbnical cavities, all mounted to 'revolve in the each head carrying semi-circular and of which dies are same vertical the axis of revolutionl of the dies, Imechamsm for rotating the heads so. that the' complementary dies will coact on the blanks on their upward travel, a spindle movable `1verticallyabove and toward and from the dies twice during each rotation of the\heads,J

mechanism for rotating the spindle on its longitudinal axis 90 on each upward movement of the spindle, fingers carried by the spindle and adapted yto grip the blanks by their heads, and closing said lingers on each alternate upward movement of the spindle.

3. A machine for swaging headed blanks which comprises .a pair of rotatable heads, each head carrying two sets of dies and each set of dies being formed of two independently detachable-members, all' of which diesv are mounted to revolve in the same vertical plane which is transverse to theA axis -of which dies of the spindle, fingers revolution ofthe dies, mechanismv for rotating the heads so that the'comp'lementary dies willcoact on the blanks on their ulpward travel, a spindle movable vertica Ily above and toward and from the dies twice during each rotation of the heads, mechanismv for rotating the spindle on its longitudinal axis 90 on each upward movement carried by the spindle and adapted to grip the blanks by their heads, and. mechanism for opening and' closingf saidv lingers on each alternate up'- ward movement of the spindle.

4. A machine for swaging headed blanks which comprises a pair of rotatable heads, each head carrying twol sets of dies, all of are mounted to revolve in the same vertical plane which is transverse to 'the axis of revolution of the vdles, mechanism for rotating the heads so that the complementary diesV will coact on the blanks on their upward travel, -a s indle movable vertically above and towar and from the dies twice during each rotation of the heads, means adapted to lift thespindle 'and permit the splndle to drop by gravity, mechanism for rotating the spindle on its longitudinal axis .90 l of the spindle, fingers carried bythe hspindle and adapted to grip the blanks by their heads, and mechanism for opening vand closmechanism`for rotating the spindleon its longitudinal axis 90 J5. A machine for each head carrying plane whichn is transverse to and mechanism for openingl ment of -the spindle,

ment 'of the s on each upward movement` ing .said lin ers on each-alternat'npward movement o the spindle: fzf' af! swaging headed blanks pair of. rotatable; heads ,f two sets of dies, all oi im which dies are mounted to revolvein the samevertical plane which is transverse to which comprises. a

' the axis of revolution of the dies,' me'chanism for rotating the-heads so that the complementary dies will coa'ct onthe blanks on 7g their upward travel, a spindle movable' vertically above and toward and Vfrom the` dies twice during each rotation `of the heads; mechanism for rotating the spindle on its longitudinal axis 90 0n each upward movement ofthe spindle, fingers carried b the spindle and adapted to grip theI blan by their heads, a spring normally holding the lingers fclose ,sand mechanism engaged` on each alternate upward movement of the spindle for` opening the fingers.y

.6. 'A machine for swaging headed blanksI which comprises a pair of rotatable heads each head carrying two sets ofdies, all oi which`l dies are mounted to revolve .in the same vertical plane which istransverse to the axis of revolution of the dies, mechanism` for rotating'the heads so that thelcomplementary dies will coact on the blanks on their upward travel, a s indle movable vertically above and toward and from the dies twice during each rotation of the heads, mechanism for rotating the spindle on its longitudinal axis on each upward movefingers carried b theI 10o spindle and adapted to grip the bl by their heads,a spring normally holding the lingers closed, a rod extending throng the spindle, and mechanism engaging said rod at eachalternate upward movement of the spindle and causing it to open vsaid fingers? 7. A machine orswaging headed blanks which comprises a pair of rotatable heads, each head carrying two sets of dies, all of which ydies are mounted to revolve inthe same vertical plane which is transverse to the axis of revolution of 'theWdieaImechanism for rotating the heads sothat the. complementary dies will coact on the blanks on. their upward travel, a s indle' movable vertically aboye and towar and from the dies twice'during each rotation 'of the heads, mechanism for rotating the spindle o`n its longitudinal axis 90 on each upward moveindle, lingers carried by the spindle and a apted to grip the`blanks byl t eir heads, a. rod extending through the spindle, a wedge on said rod adapted to open V and close said ngel-s, and means for reciprocating said rod on ,each alternate upward movement of the spindle. i

8, A machine for swaging headed blanks which comprises a pair-dof rotatable heads carrying a plurality of dies that have semi circular and semi-conical cavities,y all of 130 imv which dies are mounted to revolve in the same vertical plane -which is transverse to the axis of revolution of thedies, mechanism for rotating ltheheads so that the com- C 5 plementary diesw-ill coact on the blanks on their upward travel, a s indle movable verticallyv above and towar and from the di twice during each rotation of the heads,

mechanism for rotating the spindle on its longitudinal axis 90 on each upward mve- 10 ment of the spindle, fingers carried by 'the spindle and adapted to grip the blanks` by t eir heads, and mechanism-for opening and closing said fingers on each alternate up-V ward movement of the spindle.

r FRANK M. RUTH.