US1569740A - Pipe-threading die - Google Patents

Description

,1926. 12 w. E. GLASPEY ET AL PI PE THREADING DIE Filed Nov. 2, 1922 4 Sheets-Sheet 1 Jan. 12 1926.

W. E.' GLASPEY ET AL PIPE THREADING DIE Filed Nov. 2, 1922 4 Sheets-Sheet 2 Jan. 12 Q 1926. 1,569,740

w. E. GLASPEY ET AL PIPE THREADING DIE Filed Nov. 2, 1922 4 Shets-Sheet 5 Jan. 12 1926..

W. E. GLASPEY T AL PIPE I' l-[READING DIE Filed Nov. 2, 1922' Patented Jan. 12, 1926.

UNITED STATES PATENT OFFICE.

WARREN E. GLASPEY AND FREDEBIG COX, OE BBIEGETON, NEW JERSEY, AS- SIGNORS TO THE COX AND SONS COMPANY. OF BRIDGETON, NEW JERSEY, A COR- IORATION OF NEW JERSEY.

'ZPIPE-THREADING DIE. I

Application filed November 2, 1922. Serial No. 598,575.

To all whom it may concern:

Be it known that we, WARREN E. GLASPEY and Fnunnmo W. Cox, citizens of the United States, residing in Bridgeton, New Jersey, have invented a Pipe-Threading Die, of which the following is a specification.

Our invention relates to pipe thrbading dies, and the principal object of the invention is to provide novel and improved means for holding and adjusting the chasers in the die body.

In the attached drawings:

Figure 1 is a view of the assembled die;

Fig. 2 is a section on the line 22, Fig. 1;

Fig. 3 is a section on the line 3 -3, Fig. 1:

Fig. 4 is a face view of the cam controlling the chaser holders;

Fig. 5'is a view of the die body;

Fig. 6 is a view in perspective of one of the'chaser holders with its chaser;

Fig. 7 is a view in perspective of the chaser adjustin lever; I

Fig. 8 1s a view in perspective of the chaser adjusting lever pivot pin;

Fig. 9 is a view in perspective of the chaser adjusting lever operating cam;

Fig. 10 is a fragmentary enlarged section of a portion of the die illustrating the details of the chaser adjusting lever and associated elements;

Fig. 11 is a section on the line 11-11, Fi 1;

Fig. 12 is a fragmentary view illustrating modification of the operating parts;

ig. 13 is a section on the line 1313,

. ig. 14 is an end view shown in Fig 12, and

Fig. 15 is a view in perspective'of one element of the toggle shown in Fig. 12.

of the fragment With reference to the drawings, the die consists of a body 1 having therein a central opening 2 and on its forward face a maintain-the chaser holders in the guide slots 4 between the projections.

The die further comprises a cam disk 7 which in the present instance is provided at its, periphery with a flange 8 adapted to fit around the outer edges of the projections 3, as shown in Fig. 2. Also as shown in this latterfigure and as indicated in Fig. 5, the projections 3 are grooved at their outer edges, these grooves 9 being provided for the reception of retaining se 'ments 10 securcd'to the inner face of the fiange 8 by set screws 11, these segments while maintaining the cam disk 7 in place upon the body, in no way interfering with relative rotation of the-disk and body. The cam disk 7 is provided also with cam slots 25 whose function will be described hereinafter.

The body 1 of the die has an arm 12, in theouter end of which is a bearing 13, and journaledin this bearing is a sleeve 14 adapted to carry a threaded rdd 15, shown in Fig. 1. Attached to the cam disk 7 is a lug 16, to which is pivotally attached a link 17 which also has pivotal connection at 18 with the rod 15,- the said link 17 and the rod 15 constituting together a toggle. The link 17 further comprises a socket 19 for the reception of an operating lever 20, by means of which the toggle may be operated. It will be apparent that operation of the toggle will result in relative rotation between the'cam disk 7 and the body 1 of the die, and theslots 4 of the body 1, in which as previously described they areretained'b the plates 6. iv 7 That end of each of' the ho ders 21 lying nearest the periphery of the die is rovided with a threaded aperture 22 in W ich is a stud 23, and journaled on the projecting end of the stud is a block 24 which fits within the cam grooves 25 of the cam plate 7. It will now be a parent that rotation of the plate 7 upon t e body, owing to the oblique nature of the cam slots 25, will effect a movement of the holders 21 in the guide slots 4 of the body which will either advance or retract 28, aclamping bar 29 which engages the clamping .tated in the opening.

(ill

surfaces adapted to engage the back and lateral walls of the recess 28 as already stated. Opposite the said lateral bearing surface and adjacent this clamping surface is a longitudinal groove 31 having a wall adjacent and at an angle to the said clamping surface. Preferably the front longitudinally grooved cutting face of the chaser extends laterally beyond the plane of the clamping surface as is very clearly shown in Figs. 6 and 10. There is provided and secured to the holder by means of bolts 28,

before mentioned longitudinal surface on the chaser. The clamping bar has a hook portion 30 which fits the said groove 31 in the chaser. By reason of its engagement with the clamping surface on the chaser and the wall of the groove adjacent the clam ping surface, the said clamp serves to firmly hold the chaser in its seat on the holder. It will .be noted that the abutting surfaces'of the holder 21 and the clamp 29 are beveled, as shown at 32 in Fig. 6, and these beveled faces are so arranged that the inner edge only of the clamp bears on the beve ed surface of the holder and the bolts 28 have a tendency both to force the chaser 27 against the beveled side 27 ofthe holder and also tightly against the bottom face or base of the recess 26, whereby the chaser is held with extren'ie tightness to its seat in the holder. p

i In each of the holders 21 there is also provided a counterbored aperture 33 adapted to receive an eccentricpin 34, the projecting eccentric end 35 of the pin being threaded for the reception of a lock nut 36 and having at its extreme end and integral there with a nut 37 whereby the pin may be re- The eccentric portion of the pin passes through a slotted aperture 38 in a lever 39, which latter is pivotally mounted on a pin 40 in the chaser holder, the lever 3!) extending through a slot 41 in the holder and having at its end a tapered pin 42 which enters a recess or hole in the back of the chaser 27. Rotation of the pin 34 by reason of the eccentricity of the portion 35 which occupies the opening 38 in the lever 39 effects oscillation on its pivot pin 40 of the said lever with a resultant movement of the chaser 27, while the lever and consequently the chaser may be fastened tightly to the holder by securing the lock nut 36 which prevents rotation of the pin 34. The parts described function not only as an additional lock for the chaser 27 in its holder, but also greatly facilitate the accurate adjustmentof the chaser in the holder. I

It will be noted that the bases of the recesses 26 of the holders when the latter are mounted in the die lie in planes parallel to the axis of the die and to the axis of a pipe inserted in the die for threading, and that the required tapering of the thread is accomplished through a tapered construction of the chasers themselves. As a consequence of this construction we may employ the same holders for chasers of different taper. In dies of the ordinary type, it has been customary to obtain the taper in the cut thread by a tapered construction of the holder, itbeing necessary to employ a different set of holders for each different taper. The tapering of the chasers themselves instead of the holders not only greatly reduces the cost of manufacturing the die, but also facilitates the operation of changing chasers.

The operation of the device will be apparent. The lever 20 is shifted to straighten the toggle 15,17 and thereby causes partial rotation of the cam disk 7 in clockwise direction, see Figure 1, with the result that the chasers are advanced into position ready for contact with the work. The pipe is then revolved and threaded into the die a distance equal to the length of thread required. The lever 20 is then manipulated to break the toggle 1517, thereby rotating the cam disk 7 in a counterclockwise direction, re-

tracting the chasers and allowing the die to be withdrawn from thread out. The extent of the retraction of the chaser holders is controlled by adjusting the rod 15 in the sleeve 14, such adjustment being provided for by lock nuts 45 which normally retain the rod fixed in the sleeve. Adjustment of the chasers in their holders to bring them into conformity with eachother is accom plished by means of the aforedescribed lever 39 with its operating pin 34, this lever as before mentioned also constituting an additional lock for the chasers when the die is in operation.

In the modification illustrated in Figs. 12 to 15, the arm 16 is replaced by an elongated lug 50 having a plurality of apertures 51; while the sleeve 14 is in this instance replaced by a sleeve 52 having apertured lugs 53 adapted to lie on opposite sides of the lug 50 and to be secured to thelatter lug by a bolt 54 passed through the apertures. The apertures 51 are so placed as to give settings of the die corresponding to pipes of different (llitll'ltlQlS, whereby in setting the die for a particular diameter of pipe, it is only necessary to secure the sleeve to the lug 50 at the specified aperture 51. In this instance also,

adjustment of the sleeve 52 with respect to the rod 15 is provided for. by the aforede-' scribed nuts 45., 45,. on the threaded end of the rod. i

The operating toggle of which the constitutes an element is also modified by use of the element 55, 'shown in perspective in Fig. 15, and pivotally attached to the arm 12 by a bolt 56.

We claim:

1. A thread cutting die coinpris'ing in combination, a body, a chaser holder mounted on ing the groove in the chaser and engaging.

the aforesaid wall thereof.

I 2. A thread cutting die comprising in combination, a body,'a;chaser holder mounted on the body and .provided with a recesshaving back and lateral walls at an acute an- 1e to each other, a chaser formed with ongitudinal cutting teeth on its front face and having longitudinal back and lateral bearing surfaces adapted to engage the walls of the said recess, the said chaser also having a longitudinal lateral clamping surface opposite the said lateral bearing surface and a longitudinal groove with a walladjacent and at an angle to the. clam ing surface, a clamp engaglng the clamping surface ofthe chaser and provided with a hook portion entering the groove in the chaser and engaging the afor aid wall thereof, and

' means engaging the clamp and tending to move it both inward and rearward to. exert pressure on the clamping surface of the chaser and. also on the ad acent wall ofthe groove. i

3. A thread cutting die com rising combination, a body, a chaser hol er mounted on the body and provided with a recess having back and lateral walls at an acute angle to each other, the said holder also having an inclined surface adjacent the recess, a chaser formed with longitudinal cutting teeth ,on itsfront face and having longitudinal back and lateral bearing surfaces adapted to engage the walls of the said re- .cess, the said chaser also having a lengitudinal lateral clamping surface opposite the said lateral bearing surfaceand a longitudinal groove with a wall adjacent and at an rod; 15

angle to the clamping surface, a clamp ngag- 7 ing the clamping surface of the'chaser and provided' with a'hookortion entering the groove in the chaser an engaging the afore said wall thereof, the said clamp being provided with a heel portion having contact with the inclined surface of the holder at a positionscparated from the clamping sur--- face on the chaser, and m'eans for exertingpressureon the clamp between the edge portions thereof and tending to move the clamp inward and rearward along the'inclined surface on the holder.

4. A chaser for a thread cutting die formed with longitudinal cutting teeth on its front face and having longitudinal back and lateral bearing surfaces at "an acute angle to each other, t he said chaser also having a longitudinal lateral clamping-surface opposite the said lateral bearing surface'and a longitudinal'groove with a wall adjacent and at an angle to the clamping surface.

5. A thread cutting die comprising in. combination, a body, a chaser holder mounted on the body and having'a chaser receiving recess, a'chaser formed with'longitudinal cutting teeth .on its frontface and fitting the recess for longitudinal movement therem,

and a lever pivoted to the holder and enga ing the chaser for moving it longitudinal y as aforesaid.

6. A thread cuttlng die compr sing in combination, a. body, a'chaser holder mount-' ed on the body and having a chaser receivin recess, a chaser formed with longitudina cutting teeth on its front'face and fitting the recess for longitudinal movement therein, the said chaser having a holein its-back face and a-lever pivoted to'the holder and entering the holein the chaser for moving the chaser longitudinally as aforesaid.

7. A thread cutting diecom rising in combination, a body, a chaser hol er mounted on the body and having a, chaser receivm recess, a chaser formed with longitudina cutting teeth on its'front face and fitting the recess for lon itudin'al movement there- I in, a lever pivote to the holder and engaging the chaser for moving it longitudinally as aforesaid, and means for locking thelever in different positions. v j

8. The combination with a holder, of achasing tool seated on the holder, ,a lever pivoted-to the holder and engaging. the tool, a pin rotatably mounted in the holder and having an eccentric portion engaging the lever, and means for rotating the m to ad-- .just the position of the lever and o the chasng tool.

9. The combination with a holder, of a chasin tool seated on the holder, on apertured ever pivotally secured to the holder and en agin the. tool, a pin Iotatably mounte in t e holder and hen an eccentric portion extending through e aperture in the lever, and means for rotating the pin to shift the'lever and thereby to adjust the position of the tool on its seat.

10. The combination. with a holder, of a chasing tool seated on the holder, an apertured lever pivotally secured to the holder and engaging the tool, a pin rotatably mounted in the holder and having an eccentric portion extending through the aperture in the lever, means for rotating the pin to shift the lever and thereby to adjust the poa cha'si tool seated on the holder, an aperture lever v pivotally secured to the holder and engagin the tool, a pin rotatably mounted in the hol er and having an eccentrio portion extending through the aperture in the lever, the said pin having a threaded portion adjacent the eccentric portion,

means for rotating the pin to shift the lever and thereby adjust the position of the tool on its seat, and a nut on the threaded portion of the pin for locking the pin against rotation.

WARREN E. GLASPEY. FREDERIC W. COX.

Images