US1858850A - Pipe guide for diestocks - Google Patents

Description

May 17', 1.932 B. T.'BRDEN 1,858,850

PIPE GUIDE FOR DIESTOCKS Filed Sept. 18, 1930 /Z Je 2 'Vaca-.1.4

:Ei/)5% m F1/6.15 3%? L/eaf/fr-V7 im Patented May 17, 1932 Lassen Unirse STATES PAT- ENT @Fries i" BRADFORD T. BORDEN, OF" LAKEWOOD, OHIO, ASSIGNOR. OF l0'NIEf-I-IAIM? 10 THE BORDEN COMPANY, OF WARREN, OHIO, .A CORPORATION OF OHIO,

' LIAM A. NERACHER, OF WARREN, OHIO PIPE GUIDE rony nrEsTocKs I App1ia'-ion sied september 1s, 1930. ysemi 110.482,760.

This invention relates to adjustable guides for die stocks andsimilar toolsV adapted to act on pipes of several sizes; -Die stocks of this character having for instance,adjustable chasers settable for cutting vseveral sizes of piperequirepipefguides or'work holders 'correspondingly variable for different pipe sizes.' To avoidfthe cumbersomeness of interchangeablebushings to be loosened and removed Yi'romthedie stoclgmy invention providesfan adjust'ablepipe guide mounted on the die stock and settable'for vdiierent sizes of pipe. This guide comprises a 'pair of blocks having ynotches of varying depth Vand mounted individually on opposite sides of the pipe airis, v4sol that diierentpairs of notches can be brought into position'to produce different pipe openings by giving the blocks partial rotations.

It lis theobject of the A toiprovideV such nblocks ,in the `form whereby they may lbe very easily changed frofrnone size tol another and at the same time when set, will be rigidly held position.V The .means by which I accomplish this will be hereinafter more fully ,explainedwith 'a description of V'the preferred embodiment illustrated my pipe guide mountedon la die stock; Fig.V 2 is a view ofthe opposite faceof the die Astock showing by way of illustrationmy arrangementfor adjusting the chasers; Fig. 3 is an edge `view of the die stock equipped with my pipe guide; Fig. 4c is alongitudinal `central section through thedie stock ina planepar? lallel with'Fig; 3;A Fig. 5 is a detail incross section throughl the pipe guide itselfandfis indicated bythe line 5-,5 on Fig. 1'.

As shown in the drawings, 10 indicates a suitable frame of a, die stock. This carries on `one end suitable threading devices tol .be

hereinafterdescribed, .and on thejother end my pipe guide. Forthe latter' purpose, the frame is formedwith an outwardlyextending -flat rectangular portion 11 bounded-on opposite sides by outwardly projecting par' allel ribs 12, thus producing awide shallow t' outwardlyfacing channel 13 within'which present .inventionV .um ONE-HALF Vmo WIL-' increasing depth. The dimensionV across.

the block 20 is only slightly less than the width of the guide channel 13, so that when the blockis seated within the channel,` it is effectively held by the side ribs 12.

Each blocl20 is held tothe die stock frame by a pin 25 shown-as passing through acentral hole in the bloclr and screwing into the mid-region of thefiattened Vportion 11. This pin has a head 26 which occupies a recess 27 in the block and somewhat larger rthan Vthe pin, thisrecess extending from the outer face to a point near the inner face of the block. There is thus anl annularV space around the pinibetweeny the head of thescrew and Athe inner portion of the block which embraces the screw." In this space is mounted a helical `compression spring 294which serves to retain the block normally'against the plate/11 of 'the' diefstock so that each block is held withinthechannell and locked against rotation by the ribs 12.

` It wil'lbe readily seen that to change v'the blocks 20 for different sizes of pipe, it is only necessary for the operator to grasp a block with his fingers kengaging a pair of opposite recesses therein, lpull the blocks voutwardly a Vslight distance against the action of the spring 29 'and then'give` the block` a partial rotation, that is' to say, a quarter or half turn in 'one direction or the other,v as may be revquired to bringL anew notch into Vcoopera- 'tion with the other block. VBy this means any pair of notches may beselected in the two blocks and caused towoccupy'cooperating positions on opposite sidesof the pipe axis and centralized therewith. f

ItV is very convenient to` make adjustable die, stocks forfour'sizes of pipe as ls uch adjustment meets'a. large numberof practical requirements, thus aV comparatively small die Vstocklmay be'made for the size iofilrf, 5%",

An'y suitable form of'pipe'threading inem-V bers `may be mounted onthe die stock to coo-perate with my pipe guide I have shown herein simply by way of illustration, the form shown and claimed in my copending application No. 447 ,212 filed-April th, 1930. As shown in that application I have provided on the end of the die stock frame, suitable radial` housings made by pairs of opposed outwardly projecting lugs 15 and 16. Be-

.V tween these lugs are mounted radial chasers Yso 30. Each chaser is provided with cutting teeth V31 Von its opposite ends. Projecting from the Vchaser nearer one end than the other is an outwardly extending pin 32.

Secured to some of the housing lugs of the die stock frame,is an annular clamping plate 35 which, by overlying the lugs, holds the chasers therein against longitudinal movement. This clamping plate is shownasprovided with three notches 36, 37 and 38 of different depth. Any notch may cooperate with a pin 32 vof the corresponding chaser. To hold the clamping plate in any of its different positions land allow it to be readily shifted, it is convenient to make arcuate slots 39 in the plateand. extend through these slots clamping screws 4;() whichare threadedl in a pair of diametrically .opposite housing lugs 16. By shoving the" chasers inward to carry the pins 32 Iout'of'whatever'notches they' occupy, and by loosening the clamping-screws, the annular plate be readjusted to present different notches in line with the chasers so that they may Ythen be brought back into a different radial position with-the pins abutting the outer ends of the notches. VVhen'so adjusted, the chasers maybe clamped by the tightening of the screws 40. Y

Though only three notches 3 37 and 38 are shownin the clamping plate in Fig. 2, it will be observed that byl reason of the double ended chasers, and the fact that the'pins are nearer one end of the chasers than the other,

that Iv can accomplish four sizes of pipe by .this arrangement, for instance, with the Chaser-turned to bring the end which is incre distant from the pin inwardly and a separate i .chaser for the smallest sizeY pipe, when the -chaser pin occupies the ynotchz36 and with the next size pipe whenthe chaser occupies the notch 37, then by turning the chaser end for end l may Yset the die stock for the third sizepipewith-the pin occupying the same intermediate notch 37, and for the fourthl or largest size pipe with the pin occupying the third-notch 38. Y

The complete die stock illustrated in the drawings is an extremely simple tool, one single integral casting forming the frame of the die stock, the frame of the pipe guide and the guides for the chasers. It is only necessary then to equip such frame on one side of the chasers with suitable clamping means and on the other with my guiding blocks and 'their holding springs and screws. A It should be understood however,that my guide,though preferably having its frame integral with the die stock frame, may be made separate therefrom' andl suitably screwed thereto. Of course my guide is not limited to any particular form of holding and positioning mechanism for the chasers.

. rl'. claim 1. The combination with a frame having an opening for the passage of a pipe, a pair of blocks having non-circular exteriors and the frame being provided with fixed means to engage such exteriors and hold the blocks in anyl one of several positions, said blocks having notches of different depth in their periphery, selected ones of which may register with the pipe opening, and means for permanently holding the blocks to the frame -while allowing their movement to present different notches.

2. A pipe guide comprising a frame having a pipe opening, a pair of blocks pivotally mounted -on the frame onV axes on opposite sides of the pipe axis, said blocks having noncircular exteriors, and non-concentric ribs onthe frame adapted to engage portions of such exteriors for normally holding the blocks against rotation, said blocks having peripheral notch-es of dierent depth, so that different notchesin the two blocks maybe brought into -cooperative registration with the pipe .opening of the frame, and means for pivotally securing the blocks to the frame While allowing their axial movement for a greater distance thanthe height of the ribs.

` 3. A pipe guide comprising a frame, a pair .of parallel edge flanges,y a pair of blocks substantially square in extreme external dimensions but recessed in each face, said blocks being adapted to be held between the anges with any selected recess of one block adjacent that of the other block, the diderent recesses in the block being of different depth, said blocks being permanently pivoted at their centers but movable axially to clear the edge flanges. j

t. In a die stock,` the combination of a frame, a pair of blocks having notches in their periphery, a pair of pins Vfor pivoting said blocks to the frame, each pin having a head occupying a recess on the outer face 'of the block which does Vnot extend completely vthrough the block, and a compression spring within the recess surrounding the pin between its head and the base of the recess, and

means for holding the block. in any one of a lib numb-er of positions when it is pressed inwardly by the spring.

5. In a device of the character described, the combination of a frame having a pipe opening and a iiat rectangular portion, a pair of outwardly facing ribs at the edge of the rectangular portion, a pair of blocks having square boundaries pivotally mounted within the channel provided by the flat portion and ribs, the distance across'said blocks being slightly less than the width of the channel, each block being pivoted by a pin extending through its center into the channel, a compression spring surrounding the pin and held by a head on the pin whereby the spring normally retains theV block against the base of the channel and thus holds the block in xed position but allows the block to be drawn outlowed'by the heads on the pins.

them'in any one of avnurnber of positions Y when the blocks are pressed inwardly by the springs but clearing the blocks when the latter are drawn outwardlyV to the extent al- In testimony whereof, I hereunto aiiix signature.

' BRADFORD T. BORDEN. Y

wardly further than the ribs at the edge of Y the' channel', whereby the block may be rotated and repositioned, each block having in its edge recesses of several depths, whereby a combined recess corresponding to several sizes ofrpipe may be obtained.

6. The combination of an annular frame having a pipe opening, threading means carried by the frame on one side, a' flat rectangular portion forming an integral part of the frame on the other side and extending transversely of the opening, a pair `of `outwardly facingl ribs formed integrally with the rectangular portion at opposite edges thereof to provide a shallow outwardly facing channel, a pair of blocks materially thicker than the height of the ribs and having square boundaries pivotally mounted within the channel, the distance across said blocks being l slightly less than the width of thechannel,

each block being pivoted by a pin extending through its center into the'channel, a compression spring surrounding the pin and held in a recess in the block with suiiicient play to A suitable frame, of a pair of blocks mounted allow the block to clear the ribs, whereby the spring normally retains the block against the base of the channel and thus holds the block Y depths.

7 Ina pipe guide, the combination with a myv on opposite sides of thepipe axis and having notches of dii'erent depth in their periphery,V shoulders on the frame Vfor locking said blocks Y in any one of apluralityl of active positions,V Aand springmeans tending tohold the blocks in engagement with thevshoulders but allQwing them to be withdrawn therefrom turned to another position.

and

8. vIn a die stock, the combination' o`f a` v frame, a pairV of blocks having notches 1n l their periphery, a pair of pins carried by the frame for pivoting said blocks tothe frame,

lasl

Images