US1643832A - Nonrotary self-opening die head - Google Patents

Description

Sept. 27.1927. 1,643,832

y A. F- BREITENSTEIN ET AL l NONROTARY SELF OPENING DIE HEAD Filed Jan. 26 1926 3 Sheets-Sheet 2 wlhmmmmmmw Sept. 27. 1927. 1,643,832

A. F. BREITENSTEIN ET AL NONROTARY SELF OPENING DIE HEAD med Jan. ze 1926 s sheets-sheet s Patented sept. 27, 1927.

UNITED STATES'PATENT OFFICE..

ALBERT F. BREITENSTEIN .ANDy ERWALD A. BARTEIT, OF NEW HAVEN, CONNECTI- CUT, ASSIGNORS TO THE GEOMETRIC TOOL CO., OF NEW HAVEN, CONNECTIGUT, A.

CORPORATION.

NONR-OTARY SELF-OPENING DIE .HEAD.

Application led January 26, 1926. Serial No. 83,780.

Fig. 1 is a View in side elevation of our improved die-head, shown as closed.

Fig. 2 is a view thereof in front elevation.` Fig. 3 is a view thereof in vertical, central, 5 longitudinal section, as closed.

Fig. i is a similar View, with the .parts thereof in the positions due to them when the fixture is about'to open.

Fig. is a corresponding view, as open. Fig. 6 is a broken, longitudinal, sectional view on the line G6 of Fig. Y Fig. 7 is a corresponding view on the line 7-7 of Fig. 2. v

Fig. 8 is a corresponding view on the line 8 8 of Fig. 2. y

Fig. D is a detached view in front elevation of the locking-member of the fixture. 10 is an edge View thereof. 11 is a detached view, in front elevation, of the operating-member of the fixture. Fig. 12 is a view thereof in side elevation, partly in section.

Fig. 13 is a detached view,-in front eleva tion, of the adjusting-ring of the fixture.

14 is a view thereof 'in side elevation.I partly in section.

Fig. 15 is a detached view, in side elevation, of the Chaser-carrying member of the fixture. i

Fig. 1G is a View thereof in rear elevation. Fig, 17 is a detached view, in front elevation, of the mounting-member of lthe fixture. Fig. 18 is a view thereof in side elevation, with its shank broken away. Our invention relates to an improvement in non-rotary, self-opening die-heads, the object bein-g to produce a fixturev of the character described, constructed with particular reference to ruggedness and durability in use, simplicity lof'operation, convenience of adjustment, positiveness of action, and accuracy of performance.

With these ends in view, our invention consists in a non-rotary', self-opening diehead characterized by having a mountingmember. a Chaser-carrying member, chasers mounted therein, an operatingymember, and a locking-member located between the Chaser-carrying member and the operatingmember. the said operatingand chasser-carrying members having relative, rectilinear movement with respect to each other and with respect to the mounting-member, and the said locking-member being releasable for unlocking v)the die-head `by the forward draft imposed upon the chasers by the work.

Our invention further consists in a non` rotary, self-opening die-head characterizedl as ab,ove,and having certain other ldetails of construction as will be pointed out -in the v claims. y

In carrying out our invention, as herein shown, we employ a mounting-membery 20, a

Chaser-carrying member 21, an operatingmember 22, and a locking-member 23. The said ymounting-member 20 has a hollow shank 24,' by means of which the fixture is mounted in a turret 25, or the equivalent feature of any machine `suitable for threading operations.

At its forward end, the said mountingmember 20 is provided with a concentric bore 26 for the sliding reception of the hollow shank 27 of the chaser-carrying member 21, the forward face of which is provided with four radially-arranged slots 28 receiving radially-movable chasers 29 having ,their inner ends formed with cutting-teeth 30, and their outer ends provided with bevels 31 for co-action with beveled notches 32 located within the forward end fof the sleevelike operating-member 22, which is slidably mounted upon the forward end of the VChaser-carrying member 21.

Each of the chasers 29 is provided, near its'outer end, with a rearwardly-extending pin 33, engaged by a plunger 34 normally urged outward by a spring 35, the ysaid plunger and spring being located in a radial bore 36 formed in the chasser-'carrying `member 21, and intercommunicating with the radial slots 28 aforesaid.

At its'rear end, the sleeve-like operatingmember 22 is internally-threaded for the reception of the externally-threaded, tubular, forward end of an adjusting-ring 37, virtual-ly forming a part of the said operating-member, and sliding upon the mountingmember 20, the flanged rear end of the said ring lbeing provided vwith radial wrenchr100 sockets 38 for thev application of an ordinary Spanner wrench, by means `of which the ring is turned inward or outward as desired, with respect to the operating-member 22, so as to change the position of the beveled notches 105 32 therein, with respect to the locln'ng-member 23, whereby the diameter of the threads out by the chasers may be varied.

The forward face of the flanged rear end of the adjusting-ring 37 Vis provided with 110 an annular series of circular, shallow seats or depressions 39, with any one of which a friction-plunger is normally engaged for'preventing the-accidental rotation, by the jarring of the fixture when in'use, of the ring 37 with respect to the operatingmember 22, which is formedwith a bore 4l for the reception of the said plunger 40, and also for the reception of the spring 42, by means of which the same is operated.

-For preventing the relative rotation of the chaser-'carrier 2l and the mountingmember v2O,A without interfering with their relative, rectilinear movement, the mounting-member 2O is formed at its forward end with two oppositely-located, integral coupling-'lugs 43, embracing the' straight sides of avcoupling-boss 44 formed between the main body of the Chaser-carrying member 21 and the shank 27 thereof. Y

Y For preventingthe relative rotation of the Chaser-carrying member 21 and the operating-member 22 without interfering with their'relat'ive, rectilinear movement, we em-A ploy two locking-pins 45, driven into and projecting forwardly from an annular bear# ing-rib 46v formed wit-hin the operatingmember 22 and entering sockets 47 in the Chaser-carrier, yas shown in Fig. 7. i f

To provide for the rectilinear, reari'vard movement of the operating-member 22, with respect to the Chaser-carrying member 2l, for the purpose yof permitting the chasers to move into their open positions, under the normal urOe of their springs 35, we employ springs 48, locateddiametrically opposite each other in registered bores 49 and 50, respectively formed in the said members 2l and 22, as shown in Fig. 8. Each spring l48 encircles a guide-pin V51 mounted in the Chaser-carrier 2l and extending rearwardly therefrom, through its bore 49, and partway into theV correspending` bore 50 in the operating-member 22.

For .locliingthe. operating-member in its closed or thread-cutting position, as shown in Fig. 3, against the counter-urge of the` springs 48, just described, we .employ the segmental locking-member 23, before mentioned, the samebeing located in aforwardly-inclined.,V substantially semi-circumferential slot 52, formed in the 'mounting-member 20, as clearly shown in 17 and 18. This locking-.member is formed, at its rear end, with a segmental, external locking-rib 53, the forward edge of which co-acts with the `forivard wall of a shallow, circumferential, internal locking-groove 54 formed in the vad iustingring 37,`,as shown inv Figs. 13 and l14.; ANear its forward end, the said lockingmember is formed with a segmental, internal coupling-rib 55, entering a corresponding coupling-groove 56 (Figs. 15 and 16)V :in the .shank 27 of the Chaser-,carrying member, whereby the saidy loclringanember locking-member 28 is concurrently moved rearward and outward for the'reentrance of its locking-rib 5 3 into the groove 54. For this purpose, the said member is formed with a beveled, rear face 59, which coacts with the rear wall 6() of the said inclined slot 52.

The rearward and outward movement of the locl {ing-member, for re-setting the fixture, is effected by means of a resetting handle 6l rocking on a pin 62 in a clearancepassage 63 in the operating-member 22,'the spherically-contoured inner end V6.4 of Ythe said lever passing through a clearancepassage 65 in the mounting-member 20, into the socket 66 in the shank 27 of the Chaser` carrying member2l.

For limiting the vchaser-opening movement of the. operating-member 22, we employ a plunger 67 mounted in a bushing 68 screwed into the operating-member 22, and at its inner end'entering an elongated recess 69 formed in the periphery of the mountingmember 20, and having, at its 'rea.rrend, a hardened abutment-pin 7 O, against rwhich the inner end of the plunger 67 impinges, the plunger being normally held in the recess 69 by a spring 7l located within the bushing 68. yFor the retract-ion of the plunger from the recess 69 to permit the operating-member to move into its Chaser-removal-and-replacef ment position, it is Vprovided with a lnurled button 72.

Under the above described construction and arrangement of parts, it willbev seen that while the mounting-member, the chasercarrying member and the operating-member are held against relative rotary movement, the Chaser-carrying and -chaser-operating members have relative, rectilinear movement with respect to each other, as well as` with respectto the mounting-member, this being one of the characteristic features of our improved, non-rotary, self-opening die-head.

In the use of our improved die-head, the work represented by broken lines 73 is rotated in the usual manner, while the'nonrotary die-head is bodily movedtoward the work, on the axial line thereof, by the turret l25, or by whatever other fixture the die-head may be mounted in, the die-head being, at

this time, re-set and locked, with its chasers in their cutting positions. The cutting edges of the chasers now engaged with the work and begin the cutting operation, during which, as it will be understood, the die-head' is manually urged t-oward the work, with more or less pressure, as required. lVhen the desired lengthof thread has been cutin the work, the forward movement of the diehead is stopped, either by an abutment on the machine or by the deliberate act of the operator. The. parts of the die-head will now be in the positions in which they are shown in Fig. 3.

The work continuing to rotate, on account of being threaded into the chasers, will pull the Chaser-carrying member toward it in a rectilinear path, away Vfrom the mountingmember, for a slight distance. YAt the same time, the operating-member will Vbe correspondingly moved in a rectilinear path. due to the fact that at this time it isfpositively coupled with the Chaser-carrying member by the locking-member 23, which extends between the two members. Y Concurrently with this rectilinear movement -of the said two members, the locking-member is being posi! tively moved bodily inward, as'well as lforward, so that, at the termination of the concurrent, rectilinear movement of the two members, the locking-member has been so far moved bodily inward that the forward edge of itslocking-rib 53 will be disengaged from the forward wall of th-e shallow groove 54 in the operating-member, as shown in Fig. 4. 'At the instant the said disengagement takes place, the operating-springs 48 assert themselves' to eifect the rearward, rectilinear movement of the operating-mem# ber, independently of the Chaser-carrying member and the mounting-member, until the plunge-r 67 strikes the hardened stop-pin 70, whereby the Chaser-springs 35 are permitted to move the chasers 29 radially outward and so release them from engagement with the work 73. tion shown in 5, vith the re-setting `handle 6l rearwardly inclined.`

The die-head being'now disengaged from the work, it is bodily retired, and a newv chaser-carrving member 21 provides one of the jtwo fulera of the refsetting lever 6l, the chaser-carr}.ung member ull be urged rearward in a rectilinear path, at the tsameltime The parts will now be in the posithe operating-member Vis being moved forward in a rectilinear path by the handle. Therefore, at the instant the forward edge of the locking-rib 53 registers with the forward wall of the' shallow groove 54, the Chaser-carrier vwill move slightly rearward in a rectilinear path, whereb i the lockingmember will have its rear ace 59 forced against the rear wall 60 of the slot 52, with the effect of positively moving the lockingmember outward, as well as rearward, so as to cause its locking-rib 53 to enter the slot 54. In this last phase, the locking-member moves from the position shown in Fig. 4 to the position shown in Fig. 3.

The die-head now having been re-set, is advanced as before to the work, and tbe cycle of operations above detailed repeated.

lVe claim: y

l. A die-head having a mounting-member provided with a slot inclined with respect to its axis and having parallel walls, a chaser-carrying member, chasers mounted therein, a Chaser-operating member, and a locking-member therefor located inthe said inclined slot and having movement therein in the inclined plane thereof, said chaser-oper-- ating and rhaser-carrying vmembers having` l relative, rectilinear movement with respect to each other and with respect to the said having a mounting-member provided with ar slot inclined with respect Yto its axis and lhaving parallel walls, a Chaser-carrying member, chasers mounted therein, a chaseroperating member, and a locking-member located in the said inclined 'slot and having movement therein vin the inclined plane thereof, the said Chaser-carrying and chaser-operating members having relative rectilinear movement with respect to each other and with respect to the said mounting-member, and the locking-member being interposed between the Chaser-carrying and chaseroperating members, so as to be moved for unlocking the die-head by the forward draft imposed upon I the Chaser-carrying member bythe work and. moved for loclo ing the die-head bythe reverso movement of the said Chaser-carryingmemben 3. A non-rotary, self-opening die-bead, having a mounting-member provided with a slot inclined with respect to its axisa Chaser-carrying member slidably mounted in the mounting-member. a Chaser-operatingmember slidably mounted upon the said chaser-cariying` member, and a locking member vfor the said Chaser-operating member, having movement in the said inclined slot in the inclined plane thereof and positioned between the said Chaser-carrying member and the Chaser-operating' member, the said chaser-carryingv and Chaser-.operatiup,- members having` relative, rectilinear movement with respect to each other and with respect to the mounting-member, and the said locking-memberbeing moved for unlocking' the die-head by the forward draft imposed upon the chasers by the work.

1l. A non-rotary, self-opening die-head, having` a mounting-member provided with slot inclined with respect to its axis, a Chaser-carrying member, chasers `mounted therein, a Chaser-operating` member, an adjusting-member carried by the chaseroperatine; member at the rear end thereof, and a locking-member for the said chaseroperating` member, located in the said inclined slot and positioned between the Chaser-carrying' member and the chaseroperating member and having); bodily movement in the said inclined slot in the plane thereof, ,theV said Chaser-carrying' chaser-operatinpj members having' relative,

yrectilinear movement with respect to each other and with respect to the said mountingmember, and the said locking-membei1 being'r moved for unlocking the die-head by the forward draft imposed upon the chasers by the work.

A non-rotary, self-opening die-head, having' a mounting-member provided with a slot inclined with respect to its axis, a Chaser-carrying member carried thereby, chasers mounted therein, a Chaser-operating' member mounted upon the vsaid mountingmember, an adjusting-ring carried by the Chaser-operating; member at the rear` end thereof, and riding; upon the said mountingmember, and a locking-member for the said cl'iaser-operating member, located in the said inclined slot, positioned between the said Chaser-carrying` and chaser-operating members, and bodily moved in the inclined plane of the said slot by the relative movement between the. said mounting-member and the said Chaser-carrying; member, the said Chaser-carrying and operating-meml'iers having' relative, rectilinear movement with respect to each other and with respect to the mounting-member, and the said lockingmember being moved for unlocking the diehead as the result of the forward draft imposed upon the chasers by the work.

6. A non-rotary, self-opening' die-head,V

having a mounting-member provided with a slot inclined with respect to its axis, a chaser-carrying` member carried by the said mounting-member and slidingJ therein, chasers mounted in the said Chaser-carryin gr member, a Chaser-operating member, and

a, locking-member therefor, located in the said inclined slot, having bodily movement andV therein and extending between the Vsaid, Chaser-carrying` and Chaser-operating members, and having relative, rectilinear move'- ment with respect to yeach other and with respect to the said mounting-member, and the said locking-member being moved for unlocking the die-headA as the result of the forward draft imposed upon the chasers by the work. c.

7. A non-rotary, self-opminey die-head, having a mounting-member, a Chaser-carrying' member mounted (hereinand provided with a peripheral coupling-groove, chasers carriedby the said Chaser-carrying member, a Chaser-operating membersliding upon the 80 said mounting-member and having a lock-j ing-groove, and a locking-member for thev said Chaser-operating member, extending between the Chaser-carrying and chaseroperatinginembers, and having,` anginternal rib co-acting with the said coupling-groove. in the chaser-carrying member, and an eX- ternal rib cio-acting;` with the locking-groove in the said Chaser-operating member, the said Chaser-carrying and operating' members having' relative, rectilinear movement with respect to each other and with respect to the mounting-member, and the said locking'- member beingr disengaged from one of the members with which it engages as the 27e-95 sult of the outward draft imposed upon the chasers by the work.

8. A non-rotary, self-opening die-head, having a mounting-member provided with a slot inclined with respect to its aXis and having' parallel walls, a Chaser-carrying member, chasers mounted therein, a chaseroperating member. a locking-member for the said Chaser-operating member, locatedl in the said slot and positioned betweenthe said Chaser-carrying member and Chaser-operating member, which latter have relative, rectilinear movement with respectto each other and with respect to the'mountingmember` and the said locking-member having bodily movement inthesaid inclined slot in a. plane inclined'with respect to the v axis of the die-head for unlocking thediehead as the result of the .forward draft imposed upon the chaser-operating member by the work, and a ire-settingr lever extendiingYK between the Operating-member and the Chaser-carrying' member for effecting their relative, reverse rectilinear movement, whereby the locking-member is moved into position for locking the chasers in their closed positions.

9. A non-rotary, self-opening die-head, having' a 'mounting-i'nember provided with" an inclined slot havingouter and inner walls. a chaser-carrying` member mounted i in the said mounting-meinherq chasers mounted in thevsaid chaser-carrying meA ber, a Chaser-operating 'memben and a locking-member for the said Chaser-operistv f ating member, located in the said slot, and extending between the said Chaser-carrying and Chaser-operating members, the said Chaser-carrying and cha-ser-operating members having relative, rectilinear movement with respect to each other and with respect to the mounting-member, and the said locking-member being bodily m'oved forwardly and inwardly, and rearwardly and outwardly, by the outer and inner walls of the inclined slot in which it is located, for locking and unlocking the fixture.

l0. A non-rotary, self-opening die-head, having a mounting-member provided with a slot inclined with respect to its axis, a Chaser-carrying member, chasers mounted therein, a Chaser-operating member, a Chaser-adjusting member carried thereby at th-erear end thereof and formed with a locking-abutment, and a locking-member for the Chaser-operating member, located in the said inclined slot and having bodily movement therein in the plane thereof and co-acting with the said abutment of the adjusting-member for maintaining the chasers in their cutting positions, and the said chaser-carrying and chaser-operating members having relative, rectilinear movement with respect to each other and with respect to the said mounting-member, and the said locking-member being moved for unlocking the die-head by the forward draft imposed upon the chasers by the work.

ll. A non-rotary, self-opening die-head, having a mounting-member provided with a substantially semi-circumferential slot extending between its inner and outer peripheries and inclined with respect to its axis and having parallel walls, a chasercarrying member, chasers mounted therein, a chaser-operating member, and a segmental locking-member therefor located in the said inclined slot and having bodily movement therein in the inclined plane thereof, and the said chaser-operating and Chaser-carrying members having relative, rectilinear movement with respect to each other and with respect to the said locking-member, and the ripheral coupling-groove, chasers carried by the said Chaser-carrying member, a chaseroperating member-provided with a lockingahutment, and a segmental locking-member located in the said inclined slot and having bodily movement therein and provided with a segmental coupling-rib entering the. peripheral coupling-groove in the Chaser-carrying member, and with a segmental locking-rib co-acting with the locking-abutment aforesaid of the Chaser-operating member.

13. A non-rotary, self-opening die-head having a mounting-member provided with a tubular shank and with a slot inclined "f with respect to its axis, a chaser-carrying member having a tubular shank entering the said tubular shank ofthe mountingmember, chasers mounted in the said chasercarrying member, a chaser-operating sleeve sliding upon the said mounting-member, and a segmental locking-member located in the said inclined slot and having bodily movement therein in the inclined plane thereof and interposed between the said Chaser-carrying and operating-members and coupled with the Chaser-carrying member and having intermittent engagement, according to the position thereof, with the chaser-operating member for holding the same in the chaser-closing position.

In testimony whereof, we have signed this specification.

ALBERT F. BRE'ITENSTEIN. ERVALD A. BARTEIT.

Images