US1750103A

US1750103A - Pedestal bending machine

Info

Publication number: US1750103A
Application number: US108835A
Authority: US
Inventors: Harry E Harvey; Earl K Holmes
Original assignee: STEEL AND TUBES Inc
Current assignee: STEEL AND TUBES Inc
Priority date: 1926-05-13
Filing date: 1926-05-13
Publication date: 1930-03-11
Anticipated expiration: 1947-03-11

Description

Much 11, 1930.

H. E; HARVEY r-.TAL PEDESTAL BENmNG MACHINE 2 shegts-sneef. 1

-' Filed may 15.` 1925 w RM By l

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GRNEYS March M, w30/1.

H. 1E. HAayr-:Y ET AL 1,750,103 PED'ESTAL -BENDING MAHINE Fied May 15, 192e 2 sheets-sheet 2 Etf . ATTORNEYS` 4 40 ally extending Panarea Mar.- 11-, leso UNITED STATES PATENT OFFICE HARRY E. HARVEY AND EARL x. EoLnEs, or CLEVELAND, omo, AssIcNons, EE

MESNE ASSIGNMENTS, T STEEL AND TUBES, INC., 0F CLEVELAND, OHIO, A COB- IORATION OF OHIO PEDESTAL A IBENDING MACHINE Applicatm med May 1a, 192e. serial No. 108,835.

This invention relates to the art of bending metallic articles, and is especially concerned with the construction of new and improved apparatus 1for bending elongated metallic articles, particularly pipe, which may be constructed at relatively low expense and which is simple and easy to operate and is, to a certain extent,automatic in operation.

A chief object is to provide an apparatus which will bend light gauge tubing without substantial reduction in` area, formation of wrinkles .or vother marks of objectionable character.

A further object is to provideapparatus for bending a .metallic article, particularly a tube,'into a plurality of planes.y

. Other objects will appear and be pointed out hereinafter. ,y

In the drawings attachedto and forming a part of this application- Fig. 1 is a top plan view of one form of y apparatus embodying my invention;

' 1g. o paratus of Fig. 1;. Y

Fig. 3 is an end elevation taken in the direction indicated by line 3-3 of Fi 1;

f Fig. 4 is a longitudinal section o a valve piston; and

Fi ."5'is a fragmentary'top planview v3Q showing the-bending roll and `follower shoe alslsembled with-the adjacent parts of the maj In the'y drawings in which we haveillustrated one form of our` invention," 1 designates a hollow basey comprising a circular v o 'housing having an offset extension 2.` On top of the base 1 'is mounted a edestal 3 which tapers up andwhich carriesnear its' 'upper end ajlater-V narrow bed 4 supported at `its outer `end by a leg 5. A bending roll 'shaft' -6 extends in an upright position through the pedestal 3 and 1s supported on the top of the bed 4by an outstanding annular flange 7 which rests upon a suitably `worm gear 2 is a front sideelevation of the ap:y

'e roller C is securedto roll A as yshown in wardly to small imensionsflanged bushing8, the lower end of the shaft 6 being provided with a suitable bushing 9 supported in a bearing socket 10 carriedV by the base 1. This socket 10 may conveniently be carried by a cross wall 11 of the housing 1 and provides a bearing face to`suppo1t a ring gear 12 keyed to the shaft 6. This gear 12 .meshes with a worm gear 13 rotatably mounted in the offset rojection 2 of the housing 1. A drive sha 15 is keyed to the 13 and communicates with two oppositely driven

drive pulleys

16 and 17 which normally rotate relative to the shaft 15 but which may be engaged to drive the latter by means of a clutch 18 actuated by a clutch lever 19 and a clutch shaft 20. The actuation of the shaft 20 will presently be described in more detail.

The bending roll shaft 6 carries near its upper end a collar' 21 clamped about a collar on the shaft 6 so as to rotate therewith. This collar-21 is slit circumferentially as at 22 and twov similardogs 23a and 23h areadjustably ysecured in the slit 22 so as to en age with a lever 24 presently to be describe 70 A suitable vbending roll A is keyed to the shaft 6 above the collar21 and is of such size asv to cooperate with follower shoe B which is backed by a keeper roll 25 rotatably mounted on a carriage or bracket 26 which bracket is mounted to slide between guides 27 on the top of the'bed 4 towardand away from the shaft 6' and its bending roll.

Fig. 5 in position to clamp a tube or article to be bent to the roll when shoe B is brought `to its operating position by roll ,25. The tube or other article is 'first 'inserted between roll' 4 A and roller C, then shoe B is laced between the article and roll 25` en roll 25 is. moved 'toward roll A, the .article is 4secured to roll A so as to rotate withit. A pair of eye-bolts 28 and a turnbuckle Y29 serve to connect the bracket 26 with a crank arm 30 keyed lto a shaft 31 which extends down through 9 the bed 4. The shaft 31 carries at its lower opposite to the end where the pipe 48 enters,

end a crank arm 32. A connecting rod 33 is fastened at one end to the crank arm 32 and at the other end to a piston 34 reciprocably mounted in a cylinder 35 carried on the underside of the bed 4.

Means for actuating the roll 25 to its normal position is shown in the spring 36 while means for actuating it in the opposite direction comprises Huid pressure means conducted to the cylinder 35 through pipe 37 and a valve 38. Valve 38 is carried by the bed 4 and as shown comprises a cylinder within which is slidably mounted a circular valve piston 39 connected to a rod 40 which eX- tends out through the end of the valve cylinder 38 and is connected to a hand lever 40.

yAn intake pipe 41 brings fluid under pressure, for example compressed air, into the cylinder 38 where, when the piston 39 is properly positioned, it may pass through annular grooves in the cylinder liner 42, thence into a recess 43 on the piston and out through the pipe 37 into the cylinder35. When the piston 39 is moved so that the piston closes the inlet opening and connects the opening from pipe 37 with the outlet 37', the pressure in the cylinder 35 is relieved and the spring 36 is capable of retracting the bracket 26 to the position shown in Fig. 1. It will be understood that the movement of the piston 34 results in a movement of the bracket 26 and the rotatably carried roll 25 toward the shaft 6 and any bending roll carried thereon.

A second cylinder 44, similar in substantially all respects to cylinder 38, may also be carried on the side of the bed 4 in a position similar to and closely adjacent to the cylinder 38. This cylinder is constructed with a sleeve, corresponding to the sleeve 42 of cylinder 38, and with a piston similar to the piston 39. A connecting rod 45, similar in substantially all respects to the connecting rod is secured to the piston within the cylinder 44 and extends through one end of t e cylinder to engage with a coupling 46 which is secured pivotally to the lever 24, heretofore mentioned. This lever is pivoted near its lower end on a pin carried by the pedestal 3. The movement of the lever 24 about this pivotal point carries with it the rod and moves the piston within the cylinder 44 lirst in a position to uncover and connect the inlet pipe 47 and the outlet pipe 48 which leads to a cylinder 49 mounted on the pedestal of base member 1. Fluid pressure in the cylinder 49 or pipe 48 is exhausted through opening 49'l in the cylinder 44 when the piston in the cylinder 44 is moved into' suitable position, in substantiallythe same manner as has been just described in connection with cylinder 38 and piston 39.

Within the cylinder 49 a piston 49 is reciprocably mounted and carries, at its end a connecting rod which is adjustably connected to the clutch-shifter shaft 20 by a turnbuckle 51. The connecting rod has a bearing in a bracket 52 which comprises a part of the cylinder assembly. Between the piston and the bracket 52 and surrounding the connecting rod is disposed a spring 53 capable of returning the piston within the cylinder to the end of the latter adjacent to the entrance of pipe 48 when the fluid pressure within the cylinder is relieved.

Movement of the piston in cylinder 49 back and forth serves to move the clutchshifter 20 similarly and to engage or disengage the clutch 18 with the

drive pulleys

16 and 17.

The connecting rod is provided with a pin extending therethrough and indicated -by character 54. This pin projects through elongated openings 54a in the forked end of a lever 54 keyed to a quadrant shaft 55. This quadrant shaft 55 extends across and is supported on the lower portion of the pedestal 3 by a bearing at either end and carries at the front side of the machine a release lever 56 keyed to the shaft 55. This lever 56 carries a dog 57 and a handle 58 for operating the same, the dog being disposed to engage with a quadrant 59 which has a stop 60. The quadrant as shown is supported by suitable legs 61 on the pedestal 3. The elongated holes 54El in lever 54b permit the shaft 55 to be rotated by the lever 56 and to move the shaft 20 back and forth so as to engage or ldisengage the clutch 18 with the

drive pulleys

16 and 17.

The operation of the machine above described is substantially as follows: An elongated metallic article to be bent is secured in position between a suitable bending roll on shaft 6 and follower shoe supported by the holding roll 25 on bracket 26, the hand lever 40 then being actuated to permit fluid under pressure to be delivered into the cylinder 35 forcing out the piston and connecting rod 33, thereby turning the shaft 31 and moving the bracket 26 into holding position with respect to the article to be bent. If desired the piston 39 may be moved into position to lock t-he pressure in the cylinder 35, as by closing the intake opening from pipe 41; When'the article' to be bent has been fixed between the bending roll and the holding roll'25, the machine is ready to be actuated. The lever 56 is then moved to the left by elevating the dog 57 out of contact with the stop 60, thereby moving the clutch shaft 20 tothe left of the apparatus shown in Fi .,2, thereby engaging the clutch 18 with the rotates the drive shaft 15 and the worm 13 turns the worm wheel 12 and with the latter vthe bending roll shaft 6. This rotation continues unt1lthe dog 23* engages with the end of the lever 24 and moves the latter about lts pivot to shift the piston in cylinder 44'so rive pulleyl6, thisv air from pipe 47 andl :pe 48 into the cylinoutwardly l in the cylinder compressing the spring 53 and moving the shaft 20, thereby disengaging the clutch 18 and drive pulley 16 and then 'bringing the clutch 18 into engagement with the drive pulley 17. This movement of the clutch shifter 20 carries with it the lever 56 to the extreme end of the quadrant l59.v The drive pulley 17 rotates the shaft 15 in. the opposite direction thereby returning the shaft 6 to its initial position where the dog 23h contacts with the lever2'4 moving it in the opposite direction about its pivot and moving the piston in cylinder 44 so as to connect the pipe 48 With the discharge outlet 50, thereby relieving pressure in the cylinder 49. When the pressure in the cylinder 49 and against the piston therein is thus relieved, the spring 53 is permitted to function and serves to move the clutch shifter shaft 20 to disengage the clutch 18 and drive pulley 17, this movement being accompanied by a corresponding 'movement of the lever 56 which movement is stopped or intercepted bythe stop 6() on the quadrant 59 with which-the dog 57 engages.

It is preferable that the lever be moved so that pressure from the cylinder 38 may be relieved through outlet 43 at about the time the shaft 6 ceases rotating in its initial direction and begins reversed rotation to restore it to its original position. When this is done the bent article may be removed from between thebending roll on the shaft 6 and the holding roll 25 and taken to the truck or other place of disposal for the bentarticle's. An-

. other article to be bent can be Aprocured during the time the shaft 6 is being rotated to its initial position so that vwhenthe lever 56 has dog 57 engaging the stop 6() and the machine has ceased operating, thc second article will be in position to be. gripped between the bending roll and the holding rollU 25, and the above described operation again repeated.

`It will be vunderstood from the foregoing description that the'operation of the machine just described is extremely easy to perform, is not fatiguing to the operator and does not require the manipulation of many levers or other devices at any time or of any levers at the time when the operator should be giving some attention to the articles being bent. For example, only one lever, namely, lever 40,

needs to bev actuated prior to the time the articles to be bent are gripped against the bending roll. After the article is gripped in bending position only one other lever needs to be actuated, this being lever 56. after which the operation of the machine is naturally automatic until the lever 40 is to be actuated I to release thework blank. The entire operation is therefore, semi-automatic.

It will also be readily apparent to those vmake because of the form,

skilled inlthe art from the foregoing description of the apparatus that we have constructed an apparatus which is extremely easy to the parts comprising the apparatus, which is compact and which does not require very much ioor space,vall as contrasted with bending machines used prior to our invention.

It will'also be evident to those skilled in the art that we have provided a supporting means for the bending roll is of relatively small area and size adjacent to the roll and follower as a result of which it is possible to make a wide variation of sizes and varieties of bends. For example, a bend can be made in one plane followed by a bend of up to or in excess of 180 in another plane without obstruction being offered by theI roll support.

Although various changes, alterations and modifications in the` foregoing apparatus may be suggested by those skilled in the art without involving invention, all such changes, alterations and additions fall within the scope and spirit of our invention. The scope of our invention is defined in what is claimed.

What is claimed is:

1. A .bending machine comprising a rotatable bending roll, a holdingmember having a supporting roll associated therewith, sai holding member and roll being movable toward and away from the bending roll in adirection radial of the latter, means for actuating the holding member toward the bending roll, means for automatically moving the holdin member away from the bending roll when t e last saidmeans is in released position, and means including astarting lever for rotating, reversing and finally stopping the bending roll. t

2. A bending machinecomprising a rotatable bending roll, a holding member and a supporting means therefor, said member and supporting means being movable toward and away `from the bending roll radially of the latter, pneum tic means for actuating thev holding membrtoward the bending roll, and means including a starting lever forvrotating the bending roll a predetermined distance, reversing the direction of rotation and stopping the roll in its initial position.

3. bending machine comprising a rotatable bending roll, a holdi supportingv roll therefor, said holding member and roll being movabletoward and away from the bending roll, pneumatic means for actuating the'holding member toward and maintaining it in operative position with respect to said bending roll, and means including a starting lever for rotating the bending roll predetermined distances in one direction and then in the opposite direction.

` 4. A bending machine comprising a pedestal, an upright bending roll shaft therein, a bending roll on the. shaft, a bed extending size and feature of and follower shoe which member and a laterally from the pedestal, a holding roll article gripping position and means for rotattal having an enlarged base ing the said shaft.

5. A bending machine com rising a pedestal having therein an upriglit bending-roll shaft, a drive gear in the lower ortion of the pedestal and on the said sha t, a bed extending laterally from the pedestal and carrying a movable holding roll, a bending roll on the shaft rotatable above the top of the said bed, means to rotate the shaft, two oppositely rotating drive pulleys, clutch means engageable with one o the pulleys to rotate the shaft and automatic means for disengaging the clutch from one pulley and engaging it with the other pulley.

6. A bending machine comprising a pedestal having therein an upright bending-roll shaft provided with a drive gear disposed on its lower end and within the lower portion of the edestal, a bending roll on the upper end of t e said shaft, a bed extending laterally from the pedestal and carrying a movable holding roll, means to rotate the shaft, two

oppositely rotating drive pulleys, clutch means engageable with one of the pulleys to rotate the s aft and means to disengage the clutch means from said second pulley.

7. A bending machine com rising a pedestal havin therein an uprig t bending-roll shaft, a ged extending laterally from the pedestal and carryin a movable holding roll, a bending roll on te shaft above the said bed, pneumatic means for moving the holding roll toward the bending roll, manually controlled means for producing rotation of said shaft in one direction, automatically operable means f or arresting the said rotatlon and reversing the rotation, and positive means to stop initial osition. l

8. A nding machine comprising a pedestal having an upri ht, rotatable bending roll slaft, means in t e lower portion of the pedestal'torotate the shaft, a bendin roll on the upper end of said shaft, a be proecting laterally from one side of the pedestal low said bending oll, a 'pping member movable on said bed towa and away from the roll and means to actuate said member.

9. A bending machine comprising a pedesand a relatively l small top as com ared therewith, an upri ht .tal extending bendin roll sha rotatably mounted wit 'n the pe estal, a drive gear on the shaft within the enlarged base, a narrow bed of substantially the same width as the top of the pedesf laterally therefrom, a bending roll carried y the said shaft above the said bed, means carried by the bed for holding an article to be bent against the bending roll,

rotation of the shaft at itsA means for rotatin the said bending roll shaft, and means or actuating the article holding means.

10. A pipe bending machine comprising a bending roll rotatable about a vertical axis, means for rotating said roll, a single keeper roll freel rotatable about an axis parallel4 to that o the bending roll, means for varying the distance between said axes, along the line joining the centers of the rolls, and a follower shoe movable endwise between a tube and the keeper roll and at right angles to the said center to center line.

11. A pipe bending machine comprising a rotatable bending roll, means for rotating said roll, a keeper roll freely rotatable about an axis parallel to that of the bending roll, means for moving the axis of one roll relative to the other, and a follower shoe in- `sertable between the keeper roll and a tube and disposed tangentially to the peripheries of both rolls at the intersections therewith of a line joining the centers of the rolls.

12. A pipe bending machine comprising a vertical pedestal having an enlarged base portion and a smaller top portion, an elongated bed of approximately the width of the said top portion extending horizontally from the top of the pedestal, a vertical shaft rotatably mounted in the pedestal, means in the said base portion for rotating the shaft, a bending roll on the shaft abovev the bed, means movable lengthwise of the bed into and out of operative position with respect to the bending roll, means, including fluid under pressure, for semi-automatically moving the last said means toward and away from the bending roll, and means, including fluid under pressure, for semi-automatically rotating and restoring the saidshaft to its initial position.

13. A pipe bending machine having a vertical pedestal housing,'\a vertical shaft, means y in the base of the pedestal for rotating the shaft, a bed extending horizontally from the top of the pedestal, a bending roll on the shaft above. and of a diameter at least substantially as at as the width of the bed, a keeper slida le lengthwise of the bed, fluid pressure means for moving the keeper toward the said roll including a piston, cylinder and control yalve carried Aby the bed, spring means for retracting the said keeper, andv means for rotating the said shaft.

14. A pipe bending machine having a vertical pedestal housing, a vertical shaft, means in the base of the pedestal for rotating the shaft, a, bed extending horizontally from the top of the pedestal, a bending roll on the shaft above and of a diameter at least subcontrol valve, means for retracting the said the bending keeper, and means for rotating the said shaft.

15. A pipe bending machine having a vertical pedestal housing, a vertical shaft, means in the base of the pedestal for rotating the. shaft, a bed extending horizontally from the top of the pedestal, a bending roll on the shaft above the bed, a. keeper slidable length,- wise of the bed, means to move the keeper toward and away from the said roll, means for rotating said shat including a clutch and a clutch cotrol lever, and means for stopping, reversing and again stopping the rotation of said shaft including a cylinder, piston and control valve.

16. A pipe bending machine comprising a bending roll, manual means for causing rotation of the roll in one direction, automatic means for causing stoppage, reverse rotation and inal stoppage of the said roll, including a fluid pressure cylinder and piston, a valve controlling the same and means for actuating the valve, a keeper and manual means for actuating the keeper to move the latter towards the bending roll.

17. A pipe bending machine comprising a bending roll, means for rotating the roll in either direction including selectively employed clutches, manually operable means for selecting one clutch thereby rotating the roll in one direction, means for selecting the other clutch thereby reversing the direction of rotation of the roll, including a iuid pressure cylinder-and piston, a valve for controlling admission of fluid under pressure into said cylinder and valve actuating means controlled by said roll, a keeper, and means :for

actuating the keeper.

`18. A pipe bending machine comprising a keeper, manual means for initially actuatA the roll, and means. for controlling the roll including a fluid pressure cylinder and piston and a valve for controlling the same, the first said valve being connected with and serving also as a' control for the second said valve,

the 4latter having manually loperable means associated therwith to initiate rotation of ro i f 20. A bending machine comprising in combmation` a bending roll, means for rotating I the same for bending movement and for rotating it in the opposite direction, a holding roll, fluid pressure means for actuating the holding roll toward the bending roll on the center to center line of the rolls to press an article to be bent against the bending roll, and means for automatically retract'mg the holding roll when the bending roll reaches the end of its bending movement and before the latter is rotated in the reverse direction.

In testimony `whereof We hereunto aliix l our signatures this 11th day of April, 1926.

HARRY E. HARVEY. EARL K.v HOLMES.