US1462315A - Bending machine - Google Patents

Description

July 17, i923.

M. R. AKEY ET AL BENDING MACHINE 1919 3 Sheets-Sheet 1 Original Filed Aug. 5,

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BENDING MACHINE original Filed Aug. s, 1919 s sheets-sheet 2 July 17, 1923.`

M. R. AKEY ET AL BENDING MACHINE 3 vSheets-Shed'l 5 Original` Filed Aug. 5, 1919 by the line 2-2 of Figure :1. Figure 3 is av Patented .lilly 17,1923.

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MEADER R. AKEY, 0F SACRAMETO, AND HEBJIWAN KATZ, OF OAKLAND, CALORNIA.

BENDING MACHINE.

Application led August 5, 1919, Serial No. 315,488.` Renewed December 14, 1922.

T0 all whom t may concer/a.

Be it lrnown that we, MEADER R. AKEY, a citizen of the United States, and' a resident of Sacramento, county of Sacramento, State of California, and HERMAN KATZ, a citizen of the United States, and a resident ofOalland, county of Alameda, and State of California, have invented a new and useful Bend ing Machine, of which the following is a specification.

Our invention relates to apparatus for bending structural steel shapes.

An object of the invention is to provide a machine for rapidly and vaccurately bending structural steel shapes, especially angles and channels.

The invention possesses other features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of our invention which is illustrated in the drawings accompanying Vand forming part of the specification. lt is to be understood that we do not limit ourselves to the showing made by the said drawings and description, as we may adopt variations of the preferred form within the scope of our invention as set forth in the claims.

Referring to the :drawings: i

Figure 1 is a plan view of the bending ma chine of our invention. Figure 2 is a vertical sectional view taken in the plane indicated plan viewy of a portion of the machine, showing thek bed or foundation plate and removable forms. Figure 4 is a vertical sectional view taken transversely through a portion of the apparatus in a plane indicated by the line 4-4 of Figure 2. Figure 5 is a vertical sectional view taken transversely through a portion of the apparatus in a plane indi-v cated bythe line 5 5 of Figure 2, and showing a hoisting chain attached to the apparatus. Figure 6 is a plan view, partly in section, and on an enlarged scale of a portion of the guide arms. Figure 7 is a vertical sectional view through one of the guide boxes, taken in a plane indicated by the line 7-7 of Figure 6.v Figure 8, is a vertical sectional view similar to Figure 2,*but showing a modified form ofapparatus. Figure 9`is a vertical sectienal view similar to Figure 7 but showing a modified form of guide box used with the modified form of machine shown in Figure A8. Figure 10 is a plan view 'used in the present instance.

apparatus. Figure 11 is a vertical sectional view through oneof the guide boxes of the structure shown in Figure 10, the planey of section being indicated by the line 11--11 of that figure. Figure 12 is a vertical sectional view taken in the plane indicated by the line 12-12 of Figure 10.

Referring rst to the structure shown in Figures 1 to 7 inclusive, the bending machine comprises a foundation or bed plate 2 upon which a semi-annular plate 3provided with gear teeth 4 is pivotally mounted by pins 6. During thefuseof the bending machine the gear plate 3 is secured in position upon the bed plate by a key 7 passed through a vertical stud 8. The under side of the gear plate is formed to accommodate the segmental or sectional forms 9, two of which are The forms each comprisea segmental plate provided with a lug 11 adapted to engage in a recess formed in the bed plate, to fix the position of the forms thereon, and also provided with a peripheral ange 13, conically formed on the inner face 14, and adapted to lie against the similarly formed under side of the gear plate 3. As shown in Figure 2 the short vertical leg 16 of the angle which is to be bent, engages the peripheral surface of the form flange 13, and the long horizontal leg 17 of thev angle lies between the lower face of the form and the upper face of the edge 18 of the bed plate.

Slidably mounted in the ways 19 of the plate is a block 21. A shaft 22 is rotatable in the block and is threaded through the loose bridge 23, adapted to seat against the lugs 24; on the bed plate.v A handle 26 is provided for turning the shaft to move the block 21 toward the lugs. Pivotally mounted on the block 21 for movement in a vertical plane is a saddle 27, and pivotally mounted on the saddle for movement is a horizontal plane are twin arms 28 preferably formed of cylindrical pipe. In slidable far end adjacent the outer end of `the arm sleeves 29. Fixed on each sleeve 29' is a bracket 41, on the outer end of which is pivoted a box42 adapted `to enclose the angle 16417 which is to be bent. As shown in .Fioures '6 and 7 the box is rovided with f a hinged cover 43 adapted toy be held close 4Athe' being bent. n. f inside asshown by the dotted line 47 vthat it *canl be swung into engagement with the against the shape by latches 44. Rollers are preferably suitably mounted in the box to lessen the friction during the sliding movement of the box on the shape when it is The box isso formed on the so placed as tov lie opposite the peripheral face of the forms 9.

The rollers are provided with gear teeth 52 adapted to mesh `with thefteeth 4 of the plate 3 when the rollers are moved'iinto contact with the angle lying against the forms. In order to raise and lower the toothed plate and' the'overlying pivoted structure an eye 53 is ar` ranged inthe toothed plate adapted to be lcaught by the hook 54 'on the end of the chain 56 running to a suitably arranged winch y(not shown). The hook 54 carries a gravity operated yoke 57 adapted to engage sleeves 29' to prevent them from spreading. A Y

yOperation: The `forms 9 being placed in position on the bed plate, the pivoted gear i plate 3 is lowered and locked flat upon vthe g ture formed of the sleeve 29, rim 36 and bracket 41 to revolve about the vertical pivot on they saddle 27, swinging the rollers bed plate by the key 7, and the heated angle to be bent is pushed into position on the forms and the boxes 42 closed about it.k

The rollers 51 are next moved inwardly to f engage the outer face of the vertical leg of.

the angle, and-to engage the gear teeth 4 and' 52, by turning the screw 22, the vertical axis of the arms 28 then being coincident with the center of the plate 3. Power is then applied to the winch controlling the cables 37. This causes each quadrant struc- 51 in an arc concentric to the curve of the forms 'and rolling the hot angle 'into close contact with the forms, the rollers rolling u'ponfthe 'angle by reason of the'enlgagement oftheir teeth 52 with the gear' teeth 4 on the plate 3. Since the longleg of the angle is held between the form and the rollers reach the ends of the curved forms, the ends 61 of the rifrn's interlock, and

the twoV quadrant structurestogether with the block 21 and bridge 23 move backwardly as one, the block 21 sliding. in the bed .plate ways 19, and the rollers 51 pressing the ends of the angle against the parallel faces 62 of 'l the bed plate. `When the operation 1s completed, the boxes 42 are disengaged andthe quadrant structuresv are turned back to first position to freethe rollers frointhe bent shape, the chain 56 hooked intoithe eye 53,

the yoke 57 slipped over the arm sleeves, the

key 7 removed, and the quadrants and geared plato lifted' upwardly about th'eir horizontal axes. rIhe forms 9 may then be pushed inwardly to disengage Vfrom the bent shape, and the latter removed from the machine.

v,If shapes of greater curvature are to'be bent, larger forms and larger gear plate 3 are substituted in the machine, the sleeves 29 being adjusted'on the arms to properly positioni the rollers 51. and the faces 62being built out with pieces of the required thickness.

In the above explanation we have consid-v v.ered a machine primarily adapted forbending angles withfone of the legs on the inside of the curve. f InFigures'S and 9 are shown modificationsto -adapt the machine for bendingl angles with one of the legs 'on the outside of the curve. This isaccomplished by providing a space between the 'bottomA face 71 of theroller 51 and the4 upper face 72 of the bracket-41 in which the horizontal leg 17 of the angle is adaptedto lie. The

operation of the rollers andthe related parts is otherwise the same. In this construction the shape ofthe guide boxes 42"-is' suitably altered, as shown in Figure 9, to accommodate the different position of the` angle. In Figure 10is shown a machine adapted for bending channels.

In'this case a riderv 73 is arranged on an extension 74of-e'ach'` bracket 41, and isf adapted'to vbecarried"v roller and the form, so as to 'prevent the around within thev channel, between Vthel 110 vertical walls 7 6 of the channel `from being y i bent inwardly out of parallelism,during the bending process. In this construction also,I

the guide boxes 42are altered in formr to accominodateV the different shape, butotherwise remain the same in function and operation as those rst-l explained. i

1. .In a machine for bending steel shapes, a bed plate, a form adapted to'be seated on said bed plate, a second plate pivotally'jarranged'on said bed plate for'movement'ina vertical plane for securing and supporting 125 kon said bed plate for' 'pivotal movementv n both horizontal and vertical planes, a roller vbed plate, it cannot buckle and a smooth Aeven curve is imparted tov the angle. When the form, a pair of arms mediatelymou'nte arranged on each arm in engagement with the shape on said form, rne'ans forl moving each arm a horizontal plane to cause'the rollers to press the shape against the form, and means for moving the arms and second plate in the vertical plane to permit the bent shape to beremoved from the form.

2. In a machine for bending steel shapes, a bed plate, a form, means for releasably securing said form on said bed plate, a block slidably arranged on said bed plate, a saddle pivotally mounted in a horizontal axis on said block, a pair of arms pivotally mounted in a vertical axis upon said saddle, a roller arranged on each arm in engagement with the shape on said form, and.

means 'for moving each arm about its pivot.

3. In a machine for bending steel shapes, a bed plate, a form, means for releasably securing said `form on said bed plate, a pair of arms pivotally mounted on said bed plate, a roller arranged on each arm in engagement with the shape on ysaid form, means for moving each arm about its pivot, and means on each arm for supporting the shape in advance of the rollers comprising a box pivotally arranged on said arm, and shape engaging rollers disposed therein.

4c. In a machine for bending steel shapes,

a bed plate, a form, a gear-toothed plate for 'securing and supportingthe form on said 5. Ina machine for bending steel shapes, i

a bed plate, a form disposed on said bed plate, a pair of arms mediately pivotally mounted on said bed plate, a roller arranged on each arm in engagement with the shape on said form, a segmental grooved rim secured to each arm, and a cable engaging in said grooves and secured adjacent one end of the rims. v

In testimony whereof We have hereunto set our hands at Oakland, California, this 31st day ofJuly, 1919,

MEADER R. AKEY. HERMAN KATZ.

- Inffpresence ofy L. L. M. SALsBURY, J. B. GARDNER.

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