US2004313A - Pipe flanging machine - Google Patents

Description

June 11, 1935. w. B. CROCKETT PIPE FLANGING MACHi NE 3 Sheets-Sheet 1 Filed Sept. 15, 1933 I m /AM 8. Cpacktrv:

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June 11, 1935. w. B. CROCKETT- 2,004,313

PIPE FLANGING MACHINE Filed Sept. 13, 1935 3 Sheets-Sheet 2 I V llYYE/VTOP. ll WILL/AM 5.0000/(51'7: By 7 M June 11, 1935. w. B. CROCKETT I 2,004,313

PIPE FLANGING MACHINE Filed Sept. 13, 1933 5 Sheets-Sheei; 3

Patented June 11, 1935 UNITED STATES PIPEFLANGING mom William Barnes Crockett, Dame tie Grace, Quebec, Canada Application September 13, 1933, Serial is. 689,333 l 4 Claims.

This invention relates to pipe flanging .ma-

chines, and an object of the invention is to provide a machine for forming any required flange formation on piping, in a quick andeificient man--.

ner. A further object of the invention isito provide a machine of this character which in flanging will eliminate severe or undue strain injurious toa flanged product. A further object of the invention is to provide a machine of this character including a movable flange forming member and cooperating holding chuck for securing the piping, with the provision of means for applying the flange forming memher to the tube under a heavy pressure. l

A still further object of the invention is to provide for aplurality of different flange forming members, and a simple means of mounting said members for ready removaland replacement.

A still further object of the invention is to'provide quick and eificientmeansfor operatingslidable parts of the structure.

With these and other objects in view, the invention consistsessentially in the novelconstruc- 1 tion. and arrangement of parts as described in the following specification and illustrated in the accompanying drawings. v i Referring to the drawings: r r Figure 1 illustrates a side elevation of the machine. r Figure 2 indicates an end elevation of Figure 1 as seen from the directional arrow Figure 3 is an enlarged fragmentary longitudinal section taken throughthe upper part ofthe machine, illustrating the drive, the mounting of the flange forming member and the pipe holding chuck. 1

Figure 4: is a section on the line 4-4 ofaFig-.

ure 3. r Figure 5 is an enlarged detail'elevation of the hand wheel and shaft for moving the forming member towards and away from the chuck.

Figure 6 is an enlarged section taken. through the hand wheel showing the cam slot for actuating the clutch also the clutch and the roller mounted on the clutch projecting into the cam slot. Figure 7 is an enlarged plan view of the face of the clutch. 1

Figure 8 is a plan View of the pipe gauge body which is fitted on the chuck.

Figure 9 is a side elevation of the pipe gauge assembly showing the blades mounted in position. Figure 10 is an enlarged sectional detail of the 1 head. carrying the flange forming member ein-y ((31.153-81) V v ployed .in thecsecond flanging operation and illustrating the pipe. held in the, chuck grips in the process of being flanged, and.

:Figurell is a:view similar to Figure 10 showing the third flange formingmember finishing the flanging of .the pipe. a

Figure 12 islan enlarged fragmentary view of one end of the gauge blades showing the cut out portion witha portion of a pipe illustrated in dotted lines projecting into the cut out portion. m

. Referring more particularly to thedrawings, A indicatesthe. flange forming machine as a whole including theirame Ill which is mounted on suitable legs H and'carrying a suitable motor. [2. The framework also includes casing IS-enclosing the drive puleys and belting. In the upper part of the frame; main shaft or drive spindle i4 is mounted, this spindle constituting a slidable member, as hereinafter referredto. The spindle is of reduced. cross section at its rearward end and enlarged as. at 15 at its opposite end.

Drive pulley I6 is designed to rotate the spindle I4, the pulley being mounted on the spindle by means. of the hub structure 11, thespindle being the driving connection with the pulley by means of the splinedkeys I8, while. the extended end of the hub 11 formsa bearing for the reduced portionof the spinde in .the framework. The enlarged portion [Set the spindle iscarried in a sliding bush or hearing I9 which is heldbetween the flanged end and the rings 2! onthe enlargedportion 15 of theshaft, a ball race 22 being provided between theflanged end of, the spindle and the sliding bush. The bearing bush is mounted ina channel formed in the upper part of the framework withwhich it slidablyfits.

In .order to move. the spindle longitudinally, a rack 23is mounted on the lower side of the sliding bush 19 which is designed to engage with a pinion 24 mounted on the transverse shaft 25. (see Figs. 3 and 5 particularly). The shaft 25 is designed to be rotated through the hand wheel 26 for moving the spindle longitudinally in either direction and in addition is fitted with a worm wheel 2'! designed to be placed in driving connection with the shaft through suitable clutch mechanism hereinafter referred to. The wormwheel 2! is operated through a suitable worm 28 carried on the shaft 29 which is rotatedby a second hand wheel 30,- the purpose of whichwill be hereinafter described.

On the enlarged end of the spindle l5 beyond the flange Zllis mounted a head 3| designed to be screwed to the spindle, the head being internally threaded as at 32. The outer end of the head is bored at an angle, eccentric with the axis of the spindle I4. Within this bore is forced a ball bearing race 33, the race being designed to carry the shank 34 of the flange forming member 35 in an easy fit so that it may be readily removed. On the bed of the machine frame beyond the enlarged end of the spindle [4, a chuck body 36 is mounted. This includes the chuck cover plate 31 operated by suitable means to be described, and passing through slots 38 in the cover plate 31 (see Fig. 4) are the sliding jaws 39 carrying on their inner ends the grips 40, three of these jaws preferably being provided as shown, arranged to be brought into engagement with a pipe 4| to be flanged.

The mounting of the jaws in the chuck and the arrangement of the chuck is such that the pipe will be positioned with its longitudinal axis in direct alignment with the axis of the spindle 14, as shown particularly in Figure 3. Thus, when the pipe is gripped and the flanging head is brought into engagement with the end of the pipe to be flanged, through the sliding movement of the shaft M, as shown in Figure 3, due to the fact that the flange forming member is placed at an angle in the head 32, a portion only of its forming surface will engage the pipe, and therefore when the shaft or spindle I4 is rotated the forming surface of the flange forming member will gradually engage with the edge of the pipe until it has engage-d the entire circumference thereof, so that the flange may be formed gradually in a natural manner which will eliminate any strain injurious to a flanged product. This is a salient feature of the invention.

Mounted within the chuck body 36 between the body and the cover plate 31, is a cam ring 42. This cam ring is adapted to extend through the slots 43 in the jaws 38, (see Fig. 3). The cam ring at a point coinciding with the positioning of the jaws 35 is provided with the cam slots 44 of a character to be described, and extending through the jaws 38. Traversing the slots 43 and the cam slots 44 of the cam ring 42, are pins 45 carrying the rollers 46 (see Fig. 3), the rollers being of a diameter to coincide with the size of the cam slots 44, thus upon rotary movement of the cam ring in either direction, the jaws will be moved radially towards or away from the pipe positioned in the chuck to engage or disengage the grips 40.

Control of the cam ring 42 is effected by the arm 41 which extends into'a slot of the cam ring and projects through a recess 48 in the chuck body terminating in a slotted head 49. The head 49 connects with a link 50 by means of a pin 5| which extends into the slot of the head, the link being connected by means of the crank pin 5|" to an operating shaft 52 which carries a hand lever 53. Thus through the hand lever, the shaft 52 may be rotated one half revolution and upon rotation of the shaft 52 in either direction the arm 41 is'pulled upwardly or downwardly to rotate the ring 42 in a clockwise or anti-clockwise direction. In the head 49 an adjusting screw 54 is provided for the adjustment of pressure on the grips of the sliding jaws.

The cam slots 44 in the cam ring 42 are of two pitches, as clearly shown in Figure 4. The quick pitch part of the cam is required for accelerating or rapidly moving the jaws towards and away from the pipe and provides for opening the jaws fairly wide so that the flanged part of the pipe may pass without impedance from between the jaws. When the hand lever 53 has been moved to turn the cam ring in a clockwise direction, the jaws 38 are moved radially inward so that the grips carried thereby grip a pipe inserted in the chuck, at which point the rollers have reached a position as shown in Figure 4 having passed through the high pitched portion of the cam slot. Further movement will cause the low pitched portion of the cam slot to engage with the rollers. This low pitched portion of the cam slots is used in the gripping action on the pipe and as the crank pin 5| on shaft 52 just passes over the centre, it locks itself and the rollers have just passed into the low pitched portion of the cam slots, so that a very powerful grip on the pipe is obtained and the grip members and sliding jaws are locked in this position. Thus the low pitched portion of the cam slots in combination with the toggle operating connections of the cam rings provide for the exertion of a sufficiently heavy pressure required to hold the pipe for the flanging operation.

The grips 49 of the sliding jaws 38 are constructed so that they may be removed readily and applied quickly. This is provided for by forming the jaws and grips with mating portions, as illustrated at 55 in Figure 3, and through the provision of a spring and ball member or the like which may be mounted in the jaw, the grip may be securely fastened. In this way it is only necessary to exert a slight pressure to slide the grips from contact with the jaws or to similarly slide them into engagement.

On the cover plate 31 of the chuck, a pipe gauge 56 is mounted. This pipe gauge is provided to enable the operator when flanging a pipe to place the right length of pipe beyond the nose of the pipe grips 49. The gauge is made up i of a gauge body 51 which is provided with a plurality of radial grooves 58 which are designed to run towards the longitudinal axial centre of the chuck. These slots are designed to receive a number of gauging blades 59 illustrated in Figure 9. The blades, when placed in the grooves 58, are tensioned by the spring members 55 which will bear against the side of the blades, the latter being held in the grooves of the gauge body by means of a pin 6|, which passes through the body of the gauge traversing the slots 58 as well as traversing longitudinal slots 62 formed in the blades. Thus, while the slot in the blades permits longitudinal movement of the blades in the grooves 58 of the gauge body, the pin 6| prevents the inadvertent removal of the blades from the gauge body. At the same time pin 6!, engaging with one end of the slot 62 in the blades, 'will locate the blades in uniform arrangement when withdrawn from projected position after use. The ends of the blades as shown in Figure 9 are formed with a cut-out portion 63, the cut-out portion in each blade varying as to length and depth so that when any blade is moved radially in the slots 58 to project the end carrying the cut-out portion beyond the end of the gauge body and into the path of a pipe being projected through the centre of the chuck, the end of the to give the desired flange. The end of the blades are provided with a projection 64 which is preffantasia erably made of brassan'd 'isfonnefl wi'mra bevelled surface65 designed to be stamped withthe size of the pipe that theblade is used for. In

this way a simple arrangement is provided so that accuracy in the flangingoperation is assured at all times. i i .J The sliding spindle, as :pr'eviously'stated, .is

operated towards and away fromthei chuck by means of thehand wheeli'lfi." This provides for ordinary longitudinal movement, but in the case where the flange-forming member has been moved to a point adjacent to the end of the pipe to be flanged, it is necessary to apply considerable pressure for the flanging operation. This is effected through the hand wheel 30. The hand wheel 26 is provided with the collar 66 which is provided with a cam slot 61 in which the roller 68 is designed to operate. The roller 68 projects from a clutch member 69 (see Fig. 6) which is designed to engage with the worm wheel 21 to place it indirect engagement with the shaft 25.

As shown in Figures and 6, the slot 61 is of V shaped formation and when the roller 68 is positioned centrally of this slot, as shown, the clutch is in engagement with the worm wheel 21, thus placing it in driving engagement with the shaft. Consequently by rotating hand wheel 30, the shaft 25 may be rotated with great pressure through the medium of the worm 28 and worm wheel 21. This provides suificient flange-forming pressure between the flange-forming member 35 and the end of the pipe. When, however, the flange-forming member is being disengaged from the pipe and being brought into proximity with the end of the pipe, the hand wheel 26 is employed and when this is rotated in either direction the roller 68 will be moved by the slot 67,

thus withdrawing the clutch 69 from engagement with the Worm wheel 27 and rendering the hand wheel 35 and associated mehanism inoperative. In this way means is provided for quickly moving the spindle l4 and carrying flange-forming member towards and away from the chuck, the action comparing with the operation of the cam ring in the chuck for moving the jaws towards and away from the pipe.

In the present instance the hand wheel 35 and the low pitch portion of the cam slots 44 in the chuck mechanism serve as the power members for applying the flange-forming member and the gripping members respectively. On referring to Figures 3, and 11 it will be noted that the flange-forming is done in three operations. first operation involves. a forming member having a conoidal contour providing the flangeforming surface which flanges the pipe preliminarily. The second member presents a flat surface to the preliminarily flanged pipe and having regard to the fact that the forming members are held at an angle as previously referred to, the flat surface is applied to the flanged end of the pipe at an angle, thus bending it to a greater degree. The finished operation is carried out by the third forming member shown in Figure 11, which is provided with an annular recess, the sur- The 'the'iflanging of the pipe end is donegradually varound its periphery without any possible'strain.

In .the' general operation the appropriate formingmember is placed in the head 32. The, pipe Eto be flanged is then inserted within the chuck andthe hand lever 53 is operated to cause the. :jaws to move'radially inwards in a quick motion under the actuation of the. high pitched portion vofzthe .cam slots 44. .On' further movement of the lever of the low pitched portions of the cam slots act on the jaws to firmly press the gripping members against the pipe, at which point the pin 5li passes centre and the grips are locked on the pipe. The hand wheel 26 is then rotated in a clock-wise direction, quickly bringing the forming member 34 into proximity with the end of the pipe to be flanged. At this point the hand Wheel 30 is employed which gives the power action and thus under heavy pressure contacts the forming member withthe edge of the pipe. The portion of the forming member which contacts with the pipe therefore travels around the periphery of the pipe due to rotation of the spindle and the preliminary operation of flanging is completed, as illustrated in Figure 3. The second and third steps using the forming head shown in Figures 10 and 11 are conducted in exactly the same manner, whereupon the pipe may be readily released by the chuck mechanism. During the insertion of the pipe for flanging, the pipe gauge is set to determine the length of pipe to be flanged. In this instance the appropriate blade 59 isv moved radially to project in the path of the pipe and when the pipe is clamped the blade is returned to its normal position.

Having regard to the foregoing it will be apparent that I have provided a very efficient form of pipe flanging apparatus, the parts of which will be eflicient in operation to flange pipes without any injurious strain, while the various parts are arranged for speed of action as well as application of the necessary gripping tension and pressure required. It will be obvious that the flangeforming members required are readily removed and inserted, owing to the simple construction employed.

Various modifications maybe made in this invention without departing from the spirit thereof or the scope of the claims, and therefore the exact forms shown are to be taken as illustrative onlyand not in a limiting sense, and it is desired that only such limitations shall be placed thereon as are disclosed in the prior art or are set forth in the accompanying claims.

What I claim as my invention is:

l 1. In a pipe flanging machine, a flange forming unit including a head and flange forming member mountable therein, said head being bored at an angle to its axis to provide a mounting cavity, a ball race tightly fitted in said cavity and a shank on said forming member freely insertable within said ball race, said forming member when mounted being disposed with its axis at an angle to the axis of the head.

2. In aipipe flanging machine, a flange forming unit including a head and flange forming member mountable therein, said head being bored at an angle to its axis to receive the forming member, said forming member being formed with a shank insertable in the bore of the head whereby said forming member when mounted is disposed with its axis at an angle to the axis of the head.

iii

3. In a pipe flanging machine, a flange forming unit including a removable head and flange forming member mountable therein, said head being bored at an angle to its axis to provide a mounting cavity, bearing means positioned within said cavity, a shank formed on said forming member removably mountable in said bearing means, said forming member when mounted being disposed with its axis at an angle to the axis of the head.

4. In a pipe flanging machine, a flange forming unit including a head having a sloped outer end and a flange forming member mountable therein,

said head being bored at an angie to its axis to provide a mounting cavity, bearing means positioned within said cavity having its outer face lying flush with the sloped end of the head, said flange forming member being freely mounted within said bearing means whereby when mounted said forming member is disposed with its axis at an angle to the axis of the head.

WILLIAM BARNES CROCKE'IT.

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