US1478900A - Clamping device for rotary shears - Google Patents

Description

Dec. 25, 1923. 1,478,900

c. L. HUSTON ET Al.

CLAMPING DEVICE FOR ROTARY SHEARS 4 Sheets-Sheet 1 Filed Jur 1e l0 1920 www l TIS-...1 0-

Dec. 2.5', 1923.

1,478,900 c. L. Hus'roN ET Al.

CLAMPING DEVICE FOR V,ROTARY SHEARS Filed; June l0 1920 4 Sheets-Sheet 2 Dec. 25, 1923. v A 1,478,900

. C. L. HUSTON lET AL CLAMPING DEVICE FOR ROTARY SHEARS Filed June lO 1920 4 Sheets-Sheet 3 ffm/Wwf Dec. 25, 1923.

C. L. HUSTON ET AL.

CLAMPING DEVICE 'FOR RTARY SHEARS 4 Sheets-Sheet 4 FiledrJune l0. 1920 Patented Dec. 25, 1923.

NITED STATES CHARLES L. HUSTON AND ALFRED GOODFELLOW, OF COATESVILLE, PENNSYLVANIA.

CLAMPING DEVICE FOB,v ROTARY SHEARS.

Application filed .Tune 10, 1920. Serial No. 388,045.

To all whom t may con-cern:

Be it known that we, CHARLES L. HUsroN and ALFRED GooDrnLLow, citizens of the United States, and residents of Coatesville, county of Chester', State of Pennsylvania, have invented certain Improvements in Clamping Devices for Rotary Shears, .of which the following is a specification.

@ne object of our invention is to provide means for holding a plate while being sheared so that it canbe rotated around an axis. The invention is particularly adapted for cutting circular plates, and especially circular boiler plates.

A further object of the invention is to utilize a magnet for retaining the plate onto the holding means.

A still further object of the invention is to provide means for allowing the plate to rotate around one or two axes.

Still another object of the invention is to provide means for holding the plate in a given position so that a true circle can be cut, and a still further object is to provide means for accurately setting the plate on the magnet. j

In the accom-panying drawings:

' Fig. 1 is a longitudinal sectional view through our improved holding mechanism showing only the cutting disks of the shears;

Fig. 2 is a view illustrating the gauge;

Fig. 3 is a plan view;

Fig. 4 yis ay sectional view on the line ift Fel;

Fig. 5l is a sectional view on the line 5 5, Fig. 1;

Fig. 6 is a diagrammatic plan view showing the correct adjustment O the holding disk in respect to the cutters; and Fig. 7 is a viewr illustrating the `machine when sections oi plates are being cut so as to obtain the full holding value of the magnetic disk.

Referring to the drawings, 1 is the frame of a shearing machine in which 2 and 3 are the cutting disks. 4l is a bed plate on which is mounted a slide 5 capable of being moved towards `and from the cutting disks by a feed screw 6 adapted to bearings 7 in they bed plate 4. Any suitable means may be provided for turning this screw. The slide 5 has a nut 8 through which the screw eX- tends. Mounted on the slide is a second slide 9 which is moved 'at right angles to the slide 5 by means of a screw 10 adapted to a nut l10n the slide. On the screw is a hand wheel 12 by which it is turned. Ar-

ranged torotate on the slide 9 is a carrier 13 having a pivot pin let mounted ina center bearing on the slide 9. In order to allow it to turn freely, we provide, in the present instance, a ball lbearing 15. On the periphery of the carrier are teeth '16 and meshing with these teeth is a worm wheel 17'on a shaft 18 driven by a motor 18CL Fig. 1, By turning the worm shaft 18, the carrier can be turned on its pivot as desired. By operating the two screws 6k and 10, the carrier canbe ymoved into any position. Pivotally mounted on the carrier 13 isa bracket 19, which is held iirmly to the carrier 13 by the pressure of a spring 20 on the pivot pin 14 which extends through an opening in the' carrier as well as in the slide 9, the spring 20 being held between a nut 2l on this pin and a shoulder on the bracket.

The bracket may be of any length desired, depending'upon the size of the machine to which the invention is applied.y The bracket carries at its outer end the means for holding and supporting the disk. On the bracket is' an annular support 22 having a raceway in which are balls 23 and mounted on these balls is a raceway 24 having a spindle 25 held to the bracket by means of a4 cen-k tral bolt 26 so that while the spindle can turn freely on the bracket it is held in place by the bolt. disk 27 carrying the magnets 28, and on the hub 29l of the spindle are terminals 30 and 31 connected to wires 32. Thesewires eX- tend through the hollow spindle 14 and to any convenient point so as to connect'with the wires leading from any source of electric energy. The electric wiringwis merely shown in diagram as this may be changed accordinto the design and type oi the inachine. l/ e have also shown the magnets 28 s in diagram.'

`In order to lock the raceway 24: to the raceway 22, We provide pins 33, which are preferably tapered. On the bracket 19 is a projection 34 and on a suitable post 35 is` a vertically adjustable bar 36, which carries an adjusting screw 37 against which the projection 34 rests when the mechanism is in the cutting position so thaton turn ing the screw the plate can be brought into correct position in respect to the cutting line. By lowering the bar 36 it will allow the bracket to swino freely. Projecting from the post is a bracket 38, and on the bracket 19 is a wheel 39. The post supports Mounted on the spindle is a V the bracket 19 when the parts are in the cutting position.

Referring to the diagram, Fig. 6, it Will be noticed that the cutting line as is at one side or' the center line g/ of the cutting disks 2 and 3, and by adjusting the bracket by means of the set screvv 37 so as to bring the center e ot' the magnetic holding disks 22 on the yline the shears Will cut a true circle, the center e being the center et the circle. 1t, however, the holding disk be prevented 'from turning by the pins 33, then the center au. is the center otrotation and this center w is the center on Which the bracket 19 swings. llVhen it is desired to cut a segmental plate, such as a', shown in Fig. 7, then the bracket 19 may be shifted so'that the held disk Will be at one side ot the center, as shown at e', and the entire magnetic surface will be used to hold the segment While the cut is being made. The dotted line illustrates a segmental plate on the opposite side of the center line w of the machine, supported by the holding plate When its center is in the position In order to accurately locate the plates on the magnet holder prior to shearing,y

We mount under the disk 27, a floating ring 40 held to the disk by ring or lugs 41 secured to the disk by bolts or other tastening. In the lioating ring 40 are a series of holes into one ot which is inserted a gauge in the form or' a rod 42 on which is an adjustable `linger 43, bent as shown; the rod is graduated and the finger can be held by a set screw in any position desired.

The gauge and its ring can be turned and after the plate has been accurately located, the rod is removed from the ring.

.For the purpose of moving the plate into correct position on the magnet, We `provide a trame 44 pivoted at 45 to uprights on the bracket 19. The outer end or' the frame 44 is attached by a link 46 to an arm 47 on a shaft 48 geared to the shaft of an electric -motor 49, mounted on an extension 19a of the bracket 19. 0n the frame 44 are the rollers 50 spaced apart as shown in Fig. 3. When it is desired to adjust the plate, the trame is raised so that the plate is supported by the edge of the disk 27 and the tvvo rollers 50. When in this' position the plate can be readily moved into true position for cutting, after which the frame is lowered and the plate Will rest on the disk as shown in Thusl it Will be seen by the above description that We are enabled to accurately locate a plate on the holder and provide means for firmly holding the plate in proper position so that when movement is imparted to the plate the cutters will cut an accurate circle and the holding device can be moved towards and trom the cutters and the plate can be turned on the center e, or on the center w, as desired.

As hereinbetore stated, if a segment oi a plate is to be cut then the bracket 19 is shifted so that the entire surface of the holding disk is used to support the segment of the plate.

We claim:

1. rlhe combination in plate-holding mechanism for shearing machines, of a bed located in front ot the shears; a slide mounted on the bed; means tor moving the slide to and from the shears; a second slide mounted on the first slide and adapted to transverse Ways on the first slide; a bracket rotatably mounted solely on the second slide; a motor on said slide for turning the bracket; `and a plate holding disk pivotally mounted on the slide, said disk having magnets by which the plate is held to the disk.

2. The combination in plate holding mechanism, of a support; a disk mounted on said support; magnets carried by the disk; a ring located under the disk and free to turn thereon, said ring having a series ot holes; a rod adapted to any one of the holes; and an adjustable finger on the rod forming a gauge.

3. The combination in plate holding mechanism for shearing and like machines, ot a support; a magnetic holding device; and a trame having rollers arranged to engage a plate; and means for raising the trame so that the plate is supported by the rollers and the edge ot the magnetic holding device.

4. The combination in plate holding mechanism for shearing and like machines, of a support, a magnetic holding device lfor a plate; a trame pivoted to the support; means for raising and lowering the frame; two rollers mounted on the frame, said rollers being spaced apart, and arranged to lift one side of the plate ol' of the holding device to allow for adjustment of said plate on the holding device.

1n Wit-ness whereof We aiiX our signan tures.

CHARLES j L. HUSTON. ALFRED GOODFELLOW.

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