US1699994A

US1699994A - Die head

Info

Publication number: US1699994A
Application number: US597199A
Authority: US
Inventors: Shearer Harry Thompson
Original assignee: Landis Machine Co
Current assignee: Landis Machine Co
Priority date: 1922-10-26
Filing date: 1922-10-26
Publication date: 1929-01-22
Anticipated expiration: 1946-01-22

Description

Jan. 22, 1929. 1,699,994

H. T. SHEARER DIE HEAD I Original Filed Oct. 26. 1922 3 sh t -she t l a (for may,

Jan. 22, 1929. Y 1,699,994

H. T. SHEARER DIE HEAD Harry T Shearer Illl 3 Sheets-Sheet H. 'r. SHEARER DIE HEAD Original Filed 001;. 26. 1922 Jan. 22, 1929 61th): an

MW Harr T. Shearer Patented Jan. 22, 1929.

UNITED STATES.

PATENroFI-lcE, U

HARRY THOMPSON sH EAnER, or WAYNESBORO, PENNSYLVANIA, ASSIGNOR 'ro LANDIS M CHINE COMPANY, or wAYNEsBono, PENNSYLVANIA, A con'ronA'rIoN OF PENNSYLVANIA.

DIE HEAD.

' Application file'd October 26, 1822, Serial No. 587,199. Renewed December 7, 1928.

My said invention consists in an'improved die head of the type shown in the patent to Landis 948,893, February 8, 1910 and intended'primarily for use as acutter head of. the revolving type in which the work moves toward the head, the head having no bodily movement in the direction of its length. It is an object of the invention to rovide the head with internal tripping mec anism and means at the front of the head for actuating said tripping mechanism. v A further object is to provide an actuating device of the characterabove set forth which shall comprise a combined reamer and chamfer of an improved type.

.Other objects and advantages of the device will appear from the subj'oined description.

Referring to the accompanying drawings which are made a art hereof and on which similar reference 0 aracters indicate similar parts,

Figure 1 is a face view of my improved device, Y Figure 2 a rear viewof the same, 7

Figure 3 a central section on 1ine'33 of Figur 1, I

Figure 4 a partial section on line 44-4: of Figure 1,

Figures 5, 6, 7 and 8 are sections respectively on lines 55, 66, 7-7 and'8--8 of Figure 3, o

Figure'9 is a section of the outer shell of the device showing the parts in closed position, v 1 Figure 10 is a fragmentary section in the same plane showing the parts in open position,

Figures 11, 12 and 13 are fragmentary views showing the different positions as.- sumed by the locking pins, and I Figure. ltiis a fragment showing one of the lost motion connections between two parts of the ring frame and the means for limiting such lost -motion.

In the drawings reference character 15 indicates a holding or driving device'for the head which may be a shaft but is here shown as a shank adapted to be held in a chuck of substantially cylindrical part but may be made in several parts. secured together in any convenient manner and is surrounded by a ring frame comprising a series of

rings

18, 19, 20, 21 and 22. The

rings

18 and 20 are secured together by a series of screws 23 which also act to position the ring 19 between said

rings

18 and 20, ring 19 being held against. rotation by the customary yoke. Ring 20 is shown as made cored out, but this is merely for lightness and saving of metal. .11; ma be solid, like rin 21 if preferred. The

rlngs

20 and 2 1 are eld against relative rotation by pins 24 engaging registering openings therein. These, pins are held in place by set screws 25 and when the rings arein closed position as shown in Figure 9 their forward ends engage openings 1n the ring 22 which therefore is also held against rotary movement relatively to the remaining rings. The openings in ring 22 have located therein bushings 26 beveled at the outer end and as the pins are retracted the rings may move relatively as soon as the tapering end portionsrof the pins pass over the beveled portion of the bushings. As will be seen from Figure 9 two or more of these tapered pins are provided and engage corresponding openings in ring 22.-

The ring 22 is held in place on the body 17 by a ring 27 engaging registering annular recesses in the faces of the two members and secured in place in any convenient manner, as by screws engaging the body. A shaft 28 is mounted in a bore of the ring 21 and has threads forming a worm engaging'worm teeth 29 on the body 17. It'will be seen that the

rings

18, 20 and 21 rotate with the body but may rotate about the same to change the size/of the. die while for opening and closing the die the ring 22 may rotate to a limited extent independently of the body when the pins are retracted (Fig; 10). It will also be seen that the rings 21 and 22.are'held betweenring 27 and an annular shoulder 30 .on

the body, being thereby prevented from longitudinalmovement relatively to the body, while the remaining rings are movable longitudinally of the body to eifect the unlocking of pins24 from ring 22. This movement is limited by bolts 31 having threaded engagement with ring 2Q and having heads movable in openings of ring 21. I

The ring 22 is connected in known manner by a pin and slot connection at 32 to'each of" a series of blocks 32 fixed to trunnions 83 which form pivotal supports for the blocks. Each of these blocks as here shown is adapted to hold a flat chaser 34 though not necessarily limited to such use. The chasers 34 are fixed in pTace by clamps'34 fastened to the blocks by means of screws. Relative rotary adjustment of

rings

18, 20, 21, 22 and body 17 changes the closed position of ring 22 and therefore varies the cutting position of the chasers in accordance with the siz of the work while rotation of rin 22 relative the position of the pins 24 when the cutter jaws are closed being indicated in Figure 11 while Figures 12 and 13 indicate the positions assumed by the pins when the device is opened by a movement either to right or left according to the arrangement of the cutter blocks' As described above the openiug and closing of the cutterblocks is effected by the longitudinal movement of

rings

18, 19 and 20 relatively to the body, whereby pins 24 are brought into locking and unlocking relation with ring 22. The same longitudinal movem'ent of

rings

18, 19 and 20 for opening the head is secured as here shown 'by means of a trip device arranged internally of the head and comprising a rod or a plurality of rods 36 with heads engaging the ring 18. These rods are held in a spider formed on a sleeve 37 and provided with bores in which they are clamped. The sleeve 37 has a squared central opening threaded at its rear end in which engagesthe threaded portion of a sleeve 38, Forwardly of the sleeve 38 a hollow block 39 is slidably mounted in the sleeve 37, the squared outer pprtion of the block corresponding to the squared inner surface of the sleeve. At its forward end the block has an enlarged part with a squared opening (Figure 8) in which is engaged the squared rear end of a combined reaming and ch'amfering device 40 for reaming out the inner surface and chamfering the end of a pipe which is being threaded. This device, as will be evident, also forms the "actuating means for the tripping mechanism. At its rear end the block 39 has a cylindrical opening through which passes a shaft having threaded engagement with the shank of member 40 and having it its other end a collar 42 and a squared head 43. The collar 42 bears against the rear end of sleeve 38 and is surrounded by a sleeve 44 keyed to sleeve 38 and roviding a handle for turning said sleeve. 3 handle 44 may be turned to adjust the sleeve 38 and thus vary theposition of the block y backing off the shaft 41.

a length of pipe is engaged by the tangential V chasers 34 as the head rotates relatively to the pipe and thereupon the pipe is drawn inwardly relatively to the head as the thread is cut. WVhen the pipe has traveled a predetermined distance the combined rea'mer and chamfer 40 engages the end of the pipe and shapes it in the desired. manner. The

surface 46 between the cutting edge 47 which.

chamfers the outside and the cutting edge 48 which reams the inside of the pipe is not a cutting edge and as the end of the pipe goes against this surface or surfaces head 40 with its connecting parts is forced back by the advance of the pipe. This moves sleeve 37 with its pins or rods 36 backward, moving with it rings 18, 19 and 20 and with them pins 24, which are secured to ring 20, and so disengages pins 24 from bushings 26 in ring 22. The outward pressure of the cut combined with the outward pressure of springs 35 exerted against the chaser holders 32 rotates ring 22 about the die head thus moving the chaser holders on their pivots outward" from the axis of the head to open the head. The rotation of the ring can only begin when the conical ends of pins 24 start out of the bushings 26 and would then continue until the pins left the bushings and moved to one side thereof if no means were provided 'to limit such movement. .The

means to limit the relative rotation of ring 22 and the remainder of the die head consists of one or more bolts 31 (usually several spaced at equal distances about the'axis of Min the head). As the ring 22 moves about the other parts of the head the ring 20 is, forced backward together with

rings

18 and 19 and pins 24, i. e. the parts are passing from the position of Figs. 1, 9, 11 and 14 to that of Figs. 10 and 13. hen the head of bolt 31 seats itself at the bottom of the recess in ring 21 there can be no further rearward movement of the

rings

18, 19 and 20 relative to the head body, and there can be no relative 'circummferential movement of ring 22 and the head body unless the tip of the cone on each pin 24 has passed out of the bore of its bushing. Hence the length of the bolt 31, or strictly the distance from the underside of its head to the seat for the head, determines the arc of rotary or oscillatory move ment of the closing, ring 22.

For closing the die head the ring 19 is moved forward by means of a yoke or lever of conventional type engaging forks on the ring. Since the tapered parts of the pins 24 are in engagement with'the flaring surfaces of bushings 26, disengagement being prevented by engagement of the'heads of bolts 31 with the bottoms of the recesses in ring'21 or such movement of ring. 19 whichhave marks at its rear side to register with graduations on the outer surface'of the body 17 and indicate the relative positions of the parts.

I may substitute for the reamer shown in the drawings, a block adapted to contact with the bolt or pipe being threaded and serving only as an actuating device for the trip mechanism.

' body and adapted for movement longitudi- It will be obvious tothose skilled in the a artithat many other variations may be made in my device without departing from the spirit of the =invention, thetrue sco e of which in indicated in the appended c aims.

Having thus fully described my said in-- .vent-ion, whatI olaimas new and desire to secure by Letters Patent is: 7 v

1; A die head comprising a ring frame, a body in the frame, cutter-carrying'blocks mounted on the body and adapted to be opened and closed by relative rotarymovement of said body and the front ring of said frame, and automatic means located in-' ternally of the die head for opening the same said means including an actuatmgde vice projecting from, the face ofthe die head and means operable from'the rear end of the die head for varying the axial posltlon of said device, substantially asset forth.

2. A die head comprising a body, blocks mounted on the body, tangential chasers on said blocks, a ring extendingaboutthe body and rotatable relatively thereto the ring'being connected to said blocks for openingand closing the head, a ring extending about the nally thereof said ring carrying spaced loclo ing pins for holding. the rotary ring, 1n closed position, and awork engagingmember projecting from ,the face of the head and connected to the longitudinally movable ring for releasing said rotaryring, substantially as set forth. j

4 3. A die head comprising a body, blocks mounted on the body, tangential chasers carried by said blocks, a'ring extending about the body and rotatable relatively thereto the ring being connected to said blocks for opening and closing the head, a

second ring surrounding the body, means for adjusting the second ring about the body," a third ring movable longitudinally of the-body, pins extending from the latter.

ring through the second named ring and adapted to engage openings in the rotatable ring, and means and connected to he longitudinally movable rin for retractin said, ins from the rob v D tatablering', substantiallyas set forth 4. A die head comprising a body, cutter- I apted toengage the workl carryingblocks' mounted on the body, a ring extending about the bodyandrotatable relatively theretb said ring being connected to the cutter-carrying blocks for opening and closingthe head, means forholdingthe ring against rotation inclu ing a pin movable longitudinally of the head and having atapered end for engaging an opening in the rotatable ring, a' bushing in the opening, and

means .to limit the relative movement be-. tween said pin and the rotatable ring .to'

prevent the point of the pin from passing beyond the periphery of the bushing, substantially as set forth.

5. A die head comprising a body, blo clrs' mounted on the body, tangential chasers car 7 ri'ed by said blocks, means on the front faces of the blocks for locking the chasers in place,

a ring'extending about the body and rotatable relatively thereto the ring being (onnected to said blocks for openingand closing the head, a ring movable longitudinally .of the head and having means to engage the rotatable ring for holding it in closing position, a spider located internally ofthe head, pins on the spider engaging the'longitudinally movable ring, and work engaging means projecting forwardly from the spider and adapted to be moved rearwardly by contact with the work to move the spider and the i'ing connected thereto for releasing the rotatable ring, substantially as set forth; 6. A die head comprising a,body,- cuttercarrying blocks mounted on thebody, a ring extending about the" body and rotatable relatively thereto said ring being connected to the cutter-carrying blocks for opening and closing the head, a ring movable longitudie nally ofthe head and having means to en-- gage ,the rotatable ring" for holding it -in closing position, a spider located internally of the head, 'pins' on the spider engaging the longitudinally IDOX'QblGgIlIlQ and work engaging means projecting [forwardly from U the spider "and adapted to be moved rearwardly by contact with thework to move the spider and thering connected thereto for releasing the rotatable ring, said'work engaging means comprising a shaping ele-- ment for the work,substantially as setforth.

7. A die head comprising abody, blocks mounted on; the body, adjustable tangential chasers on the blocks, clamps on the blocks for holding the chasers in adjusted position, a ring extending about the body and rotatable relatively thereto said ring being connected to the blocks for opening and closing the head, a ring movable longitudinally of the head and having means to engage the rotatable ringfor holding it in closing position, a spider located internally of the head, pins on the spider engaging the longitudinally movable ring, said spider having a longitudinal opening, a block slidable in said opening, means for preventing relative rotation between the a tool fixed to the block for rotation therewith and means for adjusting the block longitudinally of the spider, substantially as set forth.

8. A die head comprising a body, blocks mounted on the body, adjustable tangential chasers on the blocks, clamps on the front faces of the blocks for holding the chasers in adjusted position, a ring surrounding the body and rotating relatively thereto said ring being connected to the blocks for opening and closing the head, a ring movable longitudinally of the head and having means to engage the rotatable ring for holding it in closing position, a spider located internally of the head, pinson the spider engaging the longitudinally movable ring, said spider having a longitudinal opening, a block slidable in said opening, a threaded sleeve behind the block engaging threads in saidopening, means for preventing relative rotation between the block and the spider, a rod extending axially of the die head, a work-engaging device threaded on the front end of the rod, means to hold said device from rotation independently of the block, and means on the rod engaging the rear end of the threaded sleeve whereby rotation of the rod locks the sleeve in adjusted position, substantially as set forth.

9. A die head comprising a body, blocks mounted. on the body, tangential chasers on the blocks, means for clamping the chasers in place, a ring mounted on the body and rotatable relatively-thereto said ring being connected to the cutter blocks for opening and closing the head, a ring movable longitudinally of the head and having means to engage the rotatable ring for holding it in closing position, a spider located internally of the head, pins on the spider engaging the longitudinally movable ring, said spider having a longitudinal opening, a block slidable in said opening, means for preventing relative rotation between the block and the spider, a tool having a shank engaging an opening in the block and held against rotation relative thereto, a hollow shaft having internal threaded engagement with the spider adapted to move the block longitudinally thereof and a rod in saidshaft having block and the spider,

threaded engagement with the shank of the ring mounted to oscillate about the body said blocks being connected to the latter ring for opening and closing the head, one or more pins passing through the first ring and engaging the second ring to lock the head in closed position, a ring movable axially of the body, and work-engaging means connected to said pins through the lastnamed ring to open the head at a predetermined point in its operation, substantially as set forth.

11. In a cutter head, a body, a ring mounted to oscillate about the body for opening and closing the head, cutter holders pivotally connected to the head and the ring, tangentially adjustable cutters on the holders, means for locking the ring aga nst movement, and an abutment arranged axially of the head connected to the locking means for'engaging the work at a predetermined stage of operation to unlock the rmg and open the head, substantially as set forth.

12. In a cutter head, a body, cutters carried thereby, a ,ring mounted to oscillate about the body said ring being connected to the cutters for opening and closing the head, means for locking the ring against movement, a ring slidable lengthwise of the body to unlock the oscillatory ring, a rodlike element movable axially of the body, a head on said element to engage the work, and a spider connecting said rod to the slidable ring, substantiall as set forth.

13. In a cutter hea a body, cutters carried thereby, a ring mounted to oscillate about the body said ring being connected to the cutters for opening and closing the head, means for locking the ring against movement, a ring slidable lengthwise of the body to unlock the oscillatory ring, a rodlike element movable axially of the body, a head onsaid element to engage the work, a

spider connecting said rod to the slidable ring, and means to limit the rearward movement of the slidable ring, substantially as set forth.

14. In a cutter head, a body, cutters carried thereby, a ring mounted to oscillate about the body said ring being connected to the cutters for opening and closing the head, means for locking the ring a-gainsti'movement, a ring slidablelengthwise of the body to unlock the oscillatory ring, a rod-like element movable axially of the body, a head 'on the rod to engage the Work,'a spider connecting said element to the slidable' ring, and means to limit the rearward movement of the .slidable ring including yielding means tending to return the slidable ring to locking position, substantially as set forth.

15. In a cutter head, a body, cutters carried thereby, a ring mounted to oscillate about the body said ring being connected to the cutters for opening and closing the head, means for locking the ring against movement, a ring slidable lengthwise of the body to unlock the oscillatory ring, a rod-like element movable axially of the body, a head on said element to engage the work, a spider connecting said element to the slidable ring, and meansto limit the rearward. movement of the slidable ring including bolts having heads arranged to engage positlve stops fixed to the body, substantially as set forth. 16. In a die head, a body, cutter jaws on the body, means for opening and closing the I head, means to lock the head closed, and

means to release said locking means after a predetermined operation including a spider, work-en aging means held against rotation indepen ently of the spider, connections from said work-engaging means for releasing said locking means, and means extending into the spider for adjusting such work engaging means to vary the period of operation of the cutters, substantially as setforth."

17. In a cutter head, a body, cutters carried thereby, a rin -frame including a ring mounted to oscillate about the body said ring being connected to the cutters for opening and closing the head, means for locking the ring against movement, a ring movable endwise of the body, means on the ring-frame for limiting the endwise movement of said last-named ring, and connections between said rings for unlocking the oscillatory ring 'on movement of the other ring in one direction said connections being arranged and constructed to limit the opening movement of the oscillatory ring, substantially as set forth.

18. A die head comprising a body, cutter-carrying blocks mounted on the body, a ring extending about the body and rotatable relatively thereto said ring being connected to the cutter-carrying blocks for opening and passing beyond the outer limit of the beveled portion of said bushing, substan tially as set forth.

In witness whereof, I have hereunto set my hand at Waynesboro, Pennsylvania, this 25th day of October, A. D., nineteen hundred and twenty-two.

HARRY THOMPSON SHEARER.