Патент USA US2405750код для вставки
_Aug.13, 1946. ' _E.‘LAMPQE, SR ‘ PIPE BENDING MACHINE Filed Aug. 17, 1943 h 1 _ I $2,405,750 ' > I ‘ 8 ‘Sheets-Sheet 1 / ' INVENTOR] ' 6/01/7155‘ E. ‘A MP4 6/; ATTORNEYG | | I [ Aug, 13, 1946,, c. E.’ LAMPE, SR ‘ ' 2,405,759 PIPE BENDING MACHINE , ' Filed Aug, 17,-1945 Q m ' \ INVENTOR. U % xx “D \ _ _ _ _ _ _ l $ I _._.|_.1 \ (‘HA/H585. LAM/=5, s41, . _____________+____ I g s Sheets-Sheet 4 I a a, ‘ I 0 a an“: 'ug. 13, 196. ' c. E. LAMPE, éR ' ‘ ‘PIPE BENDING MACHI‘NE Filed Aug. 17, 1945 Y I 64r __ : A ___ Q65 _ - 94%;? ' s Sheets-Sheet 5_ -____-____-______vl - :Q? I , a I v ____ ,. _______ <1 ' INVENTOR. ago '1, 15%, C. E. LAMPE, 5R PIPE BENDING MACHINE Filed Aug.- 17, 1943 8 Sheets-Sheet 6 ' U ' ‘ INVENTOR. '> c‘x/A?msi. (AA/PA: 67?. ATTORNEYS‘ Aug. 13,1946. C E LAMPE, SR ‘PIPE BENDING MACHINE Filed Aug. 17, 1943 a Sheets-Sheet 7 E5 . E IN VEN TOR. 0404/91 is £ AAA/Pi; $4; ' ;% -- r700”: vs. ' V Aug, i3, 194% c. E. LAMPE, SR ' ZAGSJSQ ‘ ‘PIPE BENDING MACHINE ‘ Filed Aug. 17,1943 8 ‘Sheets-Sheet 8 2,4053% Patented Aug. 13, 1946 UNITED STATES PATENT QFFlCE 2,405,750 PIPE BENDING MACHINE Charles E. Lampe, Sn, Philadelphia, Pa, assign or, by direct and mesne assignments, of four tenths to Charles Lovejoy, and one-tenth to Henry M. Kannee, Washington, D. 0. Application August 17, 1943, Serial No. 498,949 7 Claims. ((31. 15s_40) 1 2 My invention relates to new and useful im provements in hollow pipe bending machines, the primary object of the invention being to provide a machine of this character which is capable of bending pipe of varied diameters made of any kind of metal or alloy in a reasonable short pe riod of time. A further object of the invention resides in . pipe completely bent on a forming wheel of great er radius than that shown in Figure 1, with the motor and drive shaft for the spinner mandrel positioned accordingly, Figure 5 is an enlarged fragmentary plan view of the forming wheel showing a pipe clamped in position and about to be bent on said wheel, Figure 6 is a fragmentary top plan view show the provision of means for bending hollow pipe ing the forming wheel, the sliding form or shoe the thickness of metal. A further object of the invention resides in pro; pipe clampingmeans and its relation to the form to desired angles so that the resultant bends are 10 and the vise structure cooperating with the latter, Figure 7 is a detailed vertical section in frag smooth, round in cross section, devoid of crimps ment, showing particularly the structure of the or wrinkles and without appreciable reduction in ing wheel, Figure 8 is a similar view with elements of the viding a machine of the character mentioned in clamp separated, which the pipe is caused to be bent around a Figure 9 is an end elevation of the machine, rotating forming wheel in cooperation with a mov with parts broken away and parts in section, ing or slidable form with a rotating spinner man showing particularly the relationship of the vise drel utilized within the pipe, said forming wheel and spinner mandrel also acting as means tend 20 to the sliding form and the pipe clamping means to the forming wheel, ing to release the pipe When the bending opera Figure 10 is a vertical transverse section through tion is completed. the machine showing the detailed structure of the A further object of the invention resides in Vise and the relation between the same and the providing an improved forming means in a pipe 25 sliding form, bending machine. Another object of the invention resides in pro viding an improved clamping means for retain ing the end of the pipe to the forming wheel. Still another object of the invention resides in the provision of an improved vise coacting with the sliding form or shoe for retaining the pipe in proper relation at all times to the forming wheel. , . ' Figure 11 is a vertical transverse section. as shown on the line ll—ll of Figure 10, looking in the direction of‘the arrows, , , Figure 12 is a similar view as seen on the line l2--I 2 of Figure 10, looking in the direction of the arrows, _ ‘ Figure 13 is a similar view as seen along the line lit-l3 of Figure 10, looking in the direction ‘ Still another object of the invention resides in providing means for readily adjusting and set ting the motor and shaft for the spinner man drel to accommodate forming Wheels and pipes of varied radii and diameters, respectively. ~ of the arrows, ' Figure 14 is a front elevation of the locking key plate used in the vise, Figure 15 is a vertical section therethrough as seen on the line l5—l 5 of Figure 14, Figure 16 is a fragmentary perspective view, With these and numerous objects in view, my invention consists in the novel features of con 40 partly in section, of the sliding form or shoe show struction, combination and arrangement of parts as will be hereinafter refered to and more par ticularly pointed out in the speci?cation and claims. ing the rack bar thereon, and Figure 17 is a detailed vertical section showing the forming wheel removed from its driving shaft and about to be applied thereto. In the accompanying drawings, forming a part 45 In the bending of hollow pipe, particularly pipe of large diameter, formed of certain hard metals, of this application, considerable di?iculty has been encountered com Figure 1 is a top plan view of a pipe bending mercially. A great length of time has been re machine constructed in accordance with my in quired to bend such pipe and in many instances vention, 50 pipe formed of certain metals has been found im Figure 2 is a side elevation thereof. possible to bend. Moreover, when. andyif it were Figure 3 is a fragmentary side elevation, with possible to bend certain pipes, distortion occurred parts broken away and parts in section, illustrat at the bend thereof or crimping was notable. ing particularly the driving mechanism connect Attempts to correct the distortion or remove the ed with the forming wheel, Figure 4 is a top plan view, showing a hollow 55 crimping have caused reduction in the thickness 3 2,405,750 4 of metal at the bends. It is the purpose of my invention, as aforementioned, to overcome these many di?'iculties and provide a means for bending pipe in a reasonably short period of time. In describing my invention, I shall refer to the drawings, in which similar reference char shaft I I, the studs 2| ?tting in the openings 26 will obviously lock the wheel to the shaft for rotation with the latter. The under face of the disc-like central portion 25 is countersunk as shown at 21 to permit the upper face of the ?ange acters designate corresponding parts through is applied to the shaft, as best shown in Figures 19 and l’? of the drawings. In order to further 20 of the collar II to ?t therein when the wheel ' out the several views, and in which the numeral l designates a housing or casing for my machine, the bed of which is designated by the numeral 2. Mounted within the housing or casing one. ' secure the forming wheel to the shaft H , a plate base 3 is an air motor 4 which connects with a . into the outer end of the shaft l I, as clearly shown 28 is applied to the outer end of the hub 24 and a bolt 29 is projected therethrough and threaded speed reducer 5. A bevel gear Sconnected with the speed reducer meshes with a larger bevel gear ‘I mounted on the vertical shaft 8, the latter being in‘ Figure 10. The forming wheel 22 has a notch, recess or cut-out portion 30 formed therein to provide for mounted in bearings located at points in the the clamping means to secure the end of the pipe thereto, as will be hereinafter and more chine respectively. Keyed to the lower portion particularly set forth. There is secured to the of shaft 8 is a spur gear 9 which in turn meshes upper face of the wheel 22 at its periphery a with a larger spur gear Ill carried at the lower 20 gear segment 33, the same being bolted in place end of a second vertical or driven shaft H, as on the wheel as shown at 32. The teeth of this particularly illustrated in Figures 2 and 3 of the segment 3| mesh with the teeth of a rack bar drawings. This shaft H projects upwardly 33 secured to a sliding form 31;, the inner face through the top of the machine and is adapted to of which is concaved and conformed to the con operate the forming wheel, as will be herein 25 cavity 23 in the periphery of the forming wheel. after and more particularly set forth. ‘ This sliding form constitutes a guide for the pipe The upper portion of the shaft H is keyed to which is being bent or the forming wheel 22. a sleeve I2, the upper end- of-which is provided The sliding form 34 is removably supported on a with an outstanding annular ?ange l3. Sur block or head 35 which is adiustably supported rounding the sleeve lZ is a stationary collar or 30 in a manner hereinafter and more particularly the like l4 and interposed between said collar set forth. I 4 and the sleeve I 2 is a wear sleeve or the like The block 35 is, in fact, the head of a vise-like IS, the upper end of which is also provided with member, utilized to force‘ the sliding form 34 an outstanding annular ?ange l6 resting on the toward the forming wheel so as to look a pipe upper peripheral edge of the collar l4 so that 35 to be bent in tight engagement between said the ?ange [3 also contacts therewith. A narrow Wheel and sliding form. The outer face of the collar I‘! surrounds the shaft below the elements block or head 35 is channel shaped so as to re I2, l4 and 55 to hold the latter in proper position ceive and support therein the moving form 34. on the shaft; said collar being secured in posi A wear plate of L-shaped design designated in tion by means of a transverse pin l8 projecting 40 the drawing by the numeral 36 is ?tted in the therethrough and through said shaft I l, as par block 35 against the inner and lower walls there ticularly illustrated in Figure 9 of the drawings. of, as clearly shown in Figure 10 of the drawings. Upon the upper end of‘ this shaft H, as afore The upper portion of the block 35 is arcuately said, the forming wheel is adapted to'be-sup ported. As previously indicated, the forming . formed and over-hangs the sliding form 34 so as to provide a substantial support for the lat wheel is the wheel about which the pipe is bent ter as it moves with the forming wheel through and wheels of various radii may be used but in the medium of the intermeshing teeth 3| and 83. each instance the forming wheelwill be of the Thus, the pipe, which I have designated in the bottom of the bed and on the base of the ma same construction. - In order to support a forming wheel on the shaft H, I provide a supporting collar or the like l‘la which is ?tted over; the upper end of the shaft and provided with a lower annular ?ange l8a the latter being bolted, as'shown at i9, to the ?ange [3 of the sleeve: 12, asclearly shown in Figuresi), 10, and 17. The upper end of the collar Ha has an annular ?ange 20 formed thereon into whichis threadeda plurality of up standing studs 2!. These studs form a means for engaging the forming wheel, as will be here inafter and more particularly set forth. The forming wheel is designated by the nu meral 22, the periphery thereof, being concave as shown at 23. This wheel 22 has a central hub portion 24 of a diameter toreceive the upper end of the shaft I l’ and a thick, disc-like central drawings by the numeral 31, and whichis adapted to be bent on the forming wheel 22, is supported in position against the concave portion 23 of said wheel by means of the moving form 34, as clearly shown in Figures 3 and 4 of the drawings. This pipe 37 is adapted to be drawn forwardly around the forming wheel 22 and as said pipe is guided and supported by the moving form 34 any tend ency toward forcing of the pipe away from the forming wheel will be counteracted by the action of the moving form 34. This moving form 31% is further supported by 60 portion or web 25 connecting'the hub portion 24 with the periphery of thev wheel. Thus, the form ing wheel is in some respects similar to a pulley wheel and the disc-like central web portion 25 , is provided witha' plurality of openings 26 which are adapted to receive therein the studs 2| when the wheel is applied to the upper end of the shaft H . as shown in Figures 10 and 17 of the draw ings. When the forming wheel is applied to the 75 a transverse roller 38 mounted in bearings 39 on the bed of the machine, as clearly shown in Fig ures l, 3 and 4 of the drawings. . As stated heretofore, the block or head 35 is a portion of a vise-like device for adjustment of said head or block to its effective position. Since this'block is movable transversely of the bed of the machine, I have provided a proper support and operating means therefor. A supporting plate 40 projects laterally from the bed of the machine which has bolted thereto, as shown at 4|, the base plate 42. The upper face of said plate 42 is provided with a pair of longitudinally spaced apart grooves 43, the wallsof which are beveled outwardly from their upper to their lower 2,405,750 I6 5 edges. Bolted, as shown at M, to the lower face of the block 35 are the spaced longitudinal ribs 45, the side edges of which are also beveled out wardly from their upper to their lower edges, v_ coincident to the beveling of the walls of the ' the movable jaw 61. The lower arm of the L shaped clamp 66 and the hinged jaw 61 are each provided with a groove 68, which grooves are adapted to be engaged with the ?anges 65 of the block 63 and an insert block 69 is provided for retention within the clamp 65 for abutment against the outer face of the block 63. The in sert block 59 has its face which is opposed to grooves 43. These ribs 45 are ?tted into the grooves 43, so that the block 35, while locked to the base plate 42, may slide on the latter. the block 63 concaved as shown at 1D to conform A compound vise plate 46 is provided, the lower face of which is provided with the ribs A’! which 10 to the concavity 64 of the block 63, whereby a pipe may be secured therebetween. An adjusting also ?t within the grooves 43 of the base plate screw ‘H projecting through the vertical arm of 42, so that the vise plate 46 may slide on said base the clamp 66 permits the insert block 69 to be plate, as appears obvious. secured against the pipe after the clamp has been A rearwardly projecting extension at on the block 35 is provided with a housing QB in which 15 properly engaged with the block 53. In Figure 8 of the drawings, I have shown the elements of there is a slot 50 receiving the head 5! of adjust this clamping means separated and in Figure '1’ ing screw 52;. This adjusting screw is extended I have shown the elements secured in position through a threaded opening 53 in ‘the vise to retain the end of a pipe securely to the form plate 46. ' ing wheel. In Figure 4 I have shown the pipe 3'! Supported on the plate 45 at its outer end and abutting the outer end of the base plate 42 is the end plate 54 secured in position to the end of the plate 42 by means of the bolts 55. ‘This end plate 54 through the medium of a central opening properly secured to the forming wheel through the clamping means and'the bend completed. As a guide to the operator of the machine to illustrate the bend to be formed, a curved wire therein supports the unthreaded end of a screw 25 ‘52 may be provided and secured by a screw 13 in an upstanding projection ‘M on the hinged por shaft 56, as clearly shown in Figures 6, l0 and 13 tion 61 of the clamp, as clearly shown in Figures of the drawings. The outer end of said shaft 56 4 and '7 of the drawings. This wire is in full view is provided with a handle 51 and the inner end. of the operator of the machine and since it is of thereof extends through a threadedopening 58 in the compound vise plate 45. Thus, it will be 30 predetermined length, according to the extent of curve to be applied to the pipe, it will extend seen that the vise plate at and the block or head about the wheel for a predetermined portion of 35 may be moved or adjusted longitudinally on its circumference when applied and secured by the plate 42 by adjustment of the screw shaft 55*. ‘This would be a coarse adjustment and a ?nal adjustment of the block or head 35 is made the screw '53. When the free end of the wire reaches the outer end of the mounting member or track 35, the operator will know that the pipe through the medium of the adjusting screw 52. The formation of the longitudinal grooves 43 in plate 42 provide a substantially V-shaped central rib 59’ and side ribs 59 on said plate. These side ‘has been bent as much as desired and cut off the motor. rality of transversely registering notches 59a. A locking key plate 50 is provided which is adapted ly bending pipe and eliminating crimping or the like at the bend thereof. Naturally, an internal means is provided to produce this result. This A feature of my invention, as previously set ribs 59 are cut away at intervals to provide a plu_ 40 forth, is the provision of means for rather quick to be positioned in the transverse notches 59a so that one face of said key plate abuts the rear face of the compound vise block 45. This will retain the vise block in its initial or coarse adjustment heretofore referred to. i The locking key plate Bil is T-shaped in cross internal means is a constantly rotating one and it is speci?cally a spinner mandrel designated in the drawings by dotted lines and the numeral ‘15. The detailed structure of this spinner man drel is disclosed and described in my co-pend ing application, Serial No. 465,626, ?led Novem section, as shown in Figures 14 and 15 of the drawings, to rest on the base plate t2 and ?t in the 50 ber 14, 1942, Patent No. 2,357,011, dated August 29, 1944. The mandrel consists generally of a notches 59a. The central portion of the key plate spinner body with a plurality of rollers mounted is arcuately cut out as shown at 5! so as to permit therein and a loose linked spinner head with a the screw shaft 55 to extend therethrough. In plurality of additional rollers mounted therein. other words, the key plate ES straddles the screw shaft 56, as best shown in Figure 10 of the draw 55 As the speci?c construction of this spinner man drel is clearly shown in the aforesaid copending ings. Through this medium of coarse and fine application, I do not deem it necessary to illus adjustment of the block or head 35, it is apparent trate the same in detail nor to further describe that the moving form 34 may be readily and se curely adjusted to the proper position to support the construction thereof. ' The spinner mandrel is carried at the end of a (ill the pipe to be bent on the forming wheel. drive shaft ‘it which projects from the electric As aforesaid, the pipe is adapted to be bent motor Tl supported on the frame 18. This frame around the forming wheel 22 and I have provided operates in guides '59 extending transversely of a special locking means for securing the end of the the bed of the machine at one end of the latter, pipe to said wheel. The periphery of the wheel 22, as previously mentioned, has a notch, recess 65 as clearly shown in Figures 1 and 4 of the draw ings. Movement of the'frame ‘l8 laterally on the or cut-out portion therein as shown at 35 and machine is accomplished by operation of the by cutting away this portion of the wheel a thin handle 8i} carried on a screw shaft 8! which ?at face 62 is provided to which is welded or extends laterally of the machine and operates otherwise similarly secured a block 63. The outer face of this block is concaved as shown at 54 and 70 through a threaded collar or the like 82 on the lower face of the frame 78. This structure is the upper and lower edges of the block at the only shown in dotted lines to diagrammatically outer face thereof are provided with the projec~ illustrate the principle involved, as this is a con tions or flanges 65. ventional means for adjusting a frame on a An L-shaped clamping member 56 is provided, to the upper edge of which is hingedly engaged 75 machine.v 2,405,750 7 ' 8 'The adjustment of the motor 1"! and corre spondingly the drive shaft 15 becomes necessary as forming wheels of different radii are used in the bending of pipes of various diameters. I plug, shown in Figure 5 of the dravn'ngs, is des ignated by the numeral 85 and is provided cen trally with an opening 86 through which may be injected within the pipe a lubricant such as have provided a scale‘ at the one end of the heretofore referred to. The introduction of this machine, as shown at 83, to cover the various lubricant may be through the medium of a pres radii of forming wheels to be used and at the sure gun or the like and said lubricant will facili one end of the frame 18, I provide a pointer 84, tate the action of the spinner mandrel within sothat by setting said pointer at the particular the pipe. The plug, obviously, when inserted in radius representing the radius of the forming 10 the end of the pipe will prevent the splashing wheel to be used, the drive shaft 16 will be prop or the dripping of the lubricant from said pipe erly positioned with respect to the forming wheel as it is being bent. which may be applied to use. Of course, when The pipe in this position is then adapted to the motor and frame are positioned properly, any be clamped and secured to the forming wheel. conventional form of look may be used to secure 15 It is positioned between the block 63 of theform the same in the properly adjusted position. ing wheel and the clamp 66, the hinged element Obviously, forming wheels of different radii 61 of the latter being secured in position after are necessary according to the bends that are the insert 69 has been applied. The screw ‘H desired and also according to the size of pipe to is turned home to secure the pipe between the be bent. Under certain conditions, it is also ap insert 69 and the block 63. parent that the sliding form will also be changed Then the motor ‘H is started to rotate the shaft to correspond with the forming wheel in the 76 and the spinner mandrel 15. In Figure 9 of bending of pipe of various diameters. In setting up the machine for operation, the the drawings I have shown starting and stopping bent and applied to the drive shaft, whereupon imately 45 revolutions per minute. buttons for the motor which are connected with following steps are taken: The proper size man 25 the latter in the conventional manner (not drel is selected according to the size pipe to be shown). The spinner mandrel rotates at approx After the said mandrel, driving motor and unit are set to spinner mandrel has been started in operation, conform to the radius of the forming wheel to the forming wheel is caused to rotate by starting be used. This is accomplished by turning the 30 the air motor 4. I have shown in Figure 9 the hand wheel 80 which actuates the frame on motor control lever 71a on the front of the ma which the motor is supported and the same is chine which is connected to the motor for oper set by the indicator corresponding to the radius ation of the latter in a conventional manner, indicated on the graduated scale 83. not shown. The proper operation of the level The proper size forming wheel 22 is then 35 admits air to the air motor thereby transmitting mounted upon the vertical shaft H so that the its action through the speed reducer to the bevel same engages the four studs 2! and the same is gears 6 and 1, thence on to the spur gears 9 and I0 secured by applying the plate 28 and the screw and finally to the vertical shaft ll bearing the 29 to the end of the shaft. The forming wheel forming wheel 22. is then checked so as to be in its proper start 40 As the forming wheel 22 starts its rotation, the .ing position, as for instance, in the position sliding form 34 also moves forward through the shown in Figures 1 and 5 of the drawings. The medium of the coaction between the gear seg selection of the forming wheel 22 is, of course, ment 3! on the forming wheel and the rack bar contingent upon the size of pipe and radius of 33 on the sliding form. The forming wheel, turn bend desired. When this is accomplished, the 45 ing slowly, also moves the sliding form therewith proper sliding form 34 is inserted in the block and the coaction between these two elements 35 of the vise-like member and, of course, the tends to overcome the force which would exist guide is properly lubricated so that the sliding on the sliding form, due to the frictional load form may operate freely. exerted by the vise, were the gear and rack not The pipe to be bent is then selected and the 50 used. Furthermore, the roundness of the pipe internal walls thereof cleaned and coated with while bending is preserved through this coaction a lubricant of a special character. One form between the sliding form and the forming wheel. of lubricant usually recommended is composed When the desired bend in the pipe is completed, . of one-third white lead, one-third tallow and the machine is stopped by ?rst stopping the air one-third hypoid gear oil. The spinner mandrel 55 motor and then stopping the motor controlling is also coated with this lubricant. Then the the spinner mandrel. pipe to be bent is positioned over the spinner To remove the pipe from the spinnermandrel mandrel '15 to the desired location where the and the machine, the clamping means on the bend in the pipe is to start. A preliminary forming wheel is ?rst‘disconnected. This severs tightening of the vise-like member is accom 60 all ties between the pipe and the forming wheel. plished by turning the crank handle 51 in an Then the electric motor is started to operate the anti-clockwise direction which moves the block spinner mandrel. Following this, the forming 35 toward the pipe and carries the sliding form wheel 22 is started moving by operating the air 34 inwardly toward the forming wheel 22. Thus, motor. Since the bending action has ceased the pipe is ?rmly clamped between the forming 65 through the removal of the clamping means be wheel and the sliding form and at the same time tween the pipe and the forming wheel, the latter, the gear segment of the forming wheel and the in its operation, causes the sliding form to move rack bar of the sliding form are placed in mesh. forwardly. The pipe which is clamped between Then the key plate 60 is inserted in the nearest the forming wheel and the sliding form will, transverse notches in the vise behind the com_. 70 therefore, be drawn forwardly over the spinner pound vise block 46. A wrench is then applied mandrel. This action is carried on until the rear to the screw 52 carried in block 46 to securely end of the sliding form 34 is even with the rear retain the sliding form in position. end of the vise block 35, provided the end of the The next operation involves the application of pipe does not extend beyond the rear end of the a plug to the end of the pipe to be bent. This 75 sliding form. 'If the pipe is shorter than the rear 2,405,750 . 9 end of the sliding form, then the pipe removing action is con?ned to the point where the end of the pipe would be in line with the vise block 35. The machine is then stopped, as previously de-_ scribed, the vise block 35 is loosened and the pipe may then be readily removed from the machine. After the pipe has been removed from the ma 10 4. In ‘a pipe bending machine, a rotatable forming wheel, a sliding form movable at a tan-y gent to the forming wheel and adapted to co operate therewith, a support for slidably mount ing said sliding form, a rack carried by said slid ing form, a gear carried by said wheel and mesh ing with said rack for sliding the slidable form chine, the forming wheel may be brought back to ~ when the wheel is turned, a base plate, said sup its initial or starting position by reversing the air port being slidably mounted on said base plate 10 for radial movement with respect to said Wheel, motor. a vise plate slidably along said base plate, means The operation of the machine for all sizes of adjustably connecting said support with said vise pipes and all radii or bends is the same. Obvi plate and adapted to move the support along the ously, a change is made in the size of the form ing wheel according to the bend desired and cor base plate relative to said vise plate, means for respondingly a change is made in the sliding form manually shifting said vise plate along the base plate and correspondingly adjust said support according to the size of pipe to be bent. From the foregoing description, the construc and the sliding form with respect to the rotating tion and operation of my improved machine will wheel, and means shiftable along said base plate to positions for locking said vise plate in its ad be readily understood and it will be seen that I have provided a compartively simple, inexpensive 20 justed position with respect to said base plate. and ef?cient means for carrying out the various 5. In a pipe bending machine, a rotatable objects of the invention. While I have particu forming wheel, a sliding form disposed opposite larly described the elements best adapted to per the periphery of the wheel in position to cooper form the functions set forth, it is apparent that ate therewith, a support slidably carrying said various changes in form, proportion and in the 25 sliding form, a base plate, said support being slidably mounted on said base plate for radial minor details of construction, may be resorted to, without departing from the spirit or sacri?cing movement with respect to said forming wheel, a vise plate slidably mounted on said base plate, an What I claim is: adjusting screw threaded through said vise plate 1. In a pipe bending machine, a forming wheel, 80 and swiveled to said support, and a threaded rod the periphery of the latter being concaved to re~ rotatably mounted longitudinally of said base ceive a pipe therein, a portion of said periphery plate and threaded through the vise plate for shifting the vise plate and said support along being recessed, a block‘ carried in the recess of 'said periphery having the outer face thereof con the base plate as a unit when turned. caved, the upper and lower edges of said block 85 6.121 a pipe bending machine, a rotatable’ at the outer face thereof being provided with out forming wheel, a sliding form adapted to coop standing fianges, a clamping member comprising erate therewith, a support for said sliding form, a body portion and movable and stationary jaws, a base plate, said support being slidably mounted said jaws having grooves therein to receive the on said base plate and movable thereon radially flanges of said block, an insert block carried by 40 with respect to said forming wheel, a vise plate said clamping member abutting the outer face of slidably mounted on said base plate, means ad the ?rst mentioned block and having a concaved justably connecting said vise plate with said sup face to cooperate with the concaved face ‘of the port to move the latter upon movement of the first mentioned block, and an adjusting screw former on the base plate, said adjustable con cooperating with the body portion of the clamp 45 necting means being capable of movementto ad and said insert block to secure the elements to just the relationship of the support to said vise gether and look a pipe end to said forming wheel. plate, means for adjusting said vise plate on said 2. In a pipe bending machine, a rotating form base plate, the aforesaid base plate being notched any of the principles of the invention. , ing wheel, a sliding form extending at a'tangent at longitudinally spaced intervals, and a locking to said wheel and adapted to cooperate there 50 key insertable in the notches and adapted for with, a support for said sliding form shiftable abutment against the rear face of said vise plate radially with respect to said wheel to adjusted to secure the latter in adjusted position against positions, a track for said support, manually op casual displacement. erated means carried by said track for coarsely '7. In a pipe ‘bending machine, a rotating adjusting said support and correspondingly said 55 forming wheel, a sliding form shiftable longitu— sliding form radially with respect to said wheel, dinally opposite the periphery of said wheel and means carried by said track for locking said sup adapted to cooperate therewith, a. support for port'against casual displacement, and additional said sliding form, a base plate, said support being manually operated means carried by said track slidably mounted on said base plate and movable ' for ?nely adjusting said support radially with 60 radially of said forming wheel towards and away respect to said wheel. from the wheel, a vise plate slidably mounted on 3. In a pipe bending machine, a rotatable said base plate outwardly of said support, a screw forming wheel, a sliding form adapted for co for connecting said support with said vise plate operation therewith, a .base plate, a support for threaded through the vise plate and having its said sliding form shiftable along said base plate 65 inner end swiveled to said support, said screw radially with respect to said forming wheel, a when turnede?ecting adjustment of the support vice-plate slidably mounted on said base plate with respect to the vise plate, means for adjust outwardly of said support, manually adjusted ing said vise plate along the base plate to cor means carried 'by said vise-plate and engaged respondingly shift said support and sliding form with said support for adjusting the position of 70 towards and away from said forming wheel, and said support upon said base plate, and manually means adjustably carried by said base plate for operated means for adjusting said vise-plate and holding said vise plate against movement along said support as a unit along said base plate rela the base plate in a direction away from the wheel. tive to said forming wheel. CHARLES E. LAMPE, SR.