US2226649A - Machine for forming shapes - Google Patents

Description

Dec. 31, 1940. c. M. YoDER MACHIE FOR FORMINQ SHAPES Filed Aug. 23, 19759 IllH v INVENToR CL4/w. M Vaas/P ATTORNEY Patented Dec. 31, 1940 UNITED STATES- PATr-:NT oFFicE Y Applicail 5;;)1112291549 poses operates continuously to shape stock ierl4 from a coil into tubular form with its side edges in opposed relation ready for welding, and such machine may be associated with a cutting olf mechanism wherein the stock is severed into sections.

In all machines for forming sheet metal in tubular form, of which I have knowledge, diilrlculty has been experienced in Yovercoming dis- ,20 placement of the rolls, or certain thereof, on their shafts, especially in the employment of stock of heavy gauge. `It isnecessary that the set of rolls which provide the nal forming steps in such a machine should be rigidlysecured in position, so that each roll rotates in a plane at right angles to its shaft and maintains its alinement with the opposed or related roll. This condition applies particularly to that set of rolls which is utilized for sizing the formed stock. It has been found, where the roll fails to accurately :tit the shaft, that is, its bore is larger from end to end than the shaft or one end of the bore is larger than its other end, that the roll becomes displaced or out of alinement and hence sets up a wobbling movement or rotates in a plane other than at right 4angles tothe shaft axis. This abnormal condition has been found to occur where the diameter of the bore of the roll or that portion of the shaft on which the roll is mounted, diil'ers o one or two thousandths of an inch or more, one

from the other. In forming piping great accuracy as to the external diameter' thereof is required, so that the sizing rolls `must effect sizing to micrometer dimensions in many instances and ing action is employed to secure the roll to its shaft.` i

Other objects of the invention will be apparent to thosevslfrilled in the art to which my invention relates vfrom the following description taken in connection" with the' accompanying drawing, wherein,

Fig. l is a side elevation of a portion of a machine, embodying my invention, adapted to shape sheet metal into hollow form. 10

Fig. 2 is a plan view of the line 2-2 of Fig. 1.

Fig. 3 is an elevation looking towards the right. of Fig. l, partly in section on the line 3--3 oi' Figs.

-1 and2.

Fig. 4 is a fragmentary section through a sizing 15 roll and its mounting.

Fig. 5 is a detail view.

Fig. 6 is a view on the line 6-6 of Fig. 5.

In the drawing,A I indicates as an entirety a machine for operating on sheet metal of 'any desired 20 thickness as it com es from the mill, either hot or cold. rolled, the metal being supplied in any desired manner, as from a coil, and fed to roll passes, whereby the metal stock is continuously shaped-,into hollow form, following which the re- 25 lated edges rof the form may be welded and/or prior to or after welding the form may be cut in sections. As ,such machines are well known, I have shown only the last three roll passes la, of such a machine adapted to form piping A and a. 30 pair of sizing rolls2, 2a, mounted on shafts I.

For illustrative. purposes my improved mounting is shown applied to only one of the sets of farming rolls, namely, the iinal'set, which may be utilized to size the stock. lThe shafts l are 35 mounted in suitable anti-friction bearings in housings l, la, and at oneend the shafts 3 are provided with gears 5, 5,4 in meshing relation, whereby one shaft is drivei by the other shaft; for this latter purpose the lower shaft l is ex- 40 tended and provided with a worm gear 6 in mesh with a worm 1 fixed to a shaft lfwhich is driven by a motor (not shown) The housing la is preferably shaped to form a. casing for the gearing. The shafts, for the rolls of each pass Ia may be 5 mounted and drivingly 4coniiected to the shaft l similarly to the mounting and drive meansabove described for the shafts I, I. Each roll 2, 2a, is mounted on and xed to its supporting shaft l in the following manner: l inw vdicates a sleeve bored to' slidably and snugly llt. the shaft l. The sleeve consists of a body portion 9a. and a plurality of extensions 9b integral with and extending from one end of the body portion in circumferential relation to the shaft l. The

I inner surfaces of the extensions b are sized to fit and engage the shaft, whereas the outer surfaces are curvilinear and tapered toward their free ends and cooperate to define a cone-like seat on which the sizing roll is mounted, the roll being conically bored to complementary t the extensions 9b and so mounted thereon that its outer side projects beyond the free ends of the extensions. The shaft 3 is provided on one end portion, that is, that end 'portion adjacent the extensions Qb, with a fixed collar -or abutmentla (preferably formed integrally therewith) and one or more spacers I0 (only one being shown) are interposed between the collar 3a and the adjacent side of the sizing roll to form an abutment means therefor, and to aline the rolls one with the other. The opposite end portion of the shaft 3 is provided with screw threads Ib to take a nut II, which is arranged to be tightened against the adjacent end of the sleeve 9. such operation serving to force the extensions 9b axially of the shaft and sizing roll, which being held stationary by the collar 3a, compresses the extensions 97h inwardly into rigid relation to the shaft, so that the extensions form a circumferential wedge between the shaft and roll. As the metal of the sleeve 9 is slightly resilient and the extensions 9b are spaced from each other, they may be compressed inwardly to effect a wedging action as above set forth, so that when the nut Il is tightened, the

sizing roll is -xedly secured from end to end to the shaft and danger of its wobbling or getting out of alinement with the axis of the shaft is eliminated.

The nut Il may be iixed in tightened position by a jam-nut I2.

If desired the sleeve 9 may be keyed to the shaft 3 and when necessary one or more spacers may be provided between the nut Il and the adjacent end of the sleeve.

,To those skilled in the art to which my inventionrelates, many changes in construction and widely differing embodiments and applications of the invention will suggest themselves withoutdeparting from the spirit and scope of my invention. The disclosures and the description herein are purely illustrative and are not intended to be in any sense limiting.

What I claim is:

l. In a machine o`f the class described, the combination with a pair of housings, of upper and lower shafts mounted therein, a roll mounted on one of said shafts, a sleeve slidably tting the other shaft and provided atone end with spaced extensions the outer surfaces of which define a cone-like seat, abutment means iixedly secured to said shaft, a roll alined with said rst mentioned roll and having a conical bore fitting said seat, and engaging said abutment means, and means on said shaft arranged to engage the other end of the sleeve and force it endwise to effect a wedging action of said extensions between said shaft and said roll, whereby the latter is rigidly connected to said shaft.

2. In a machine of the class described, the combination with a pair of housings, of upper and lower shafts mounted therein, a roll mounted on one of ysaid shafts, the other shaftbeing provided adjacent one end portion with a fixed abutment and adjacent its other end portion with screw threads, a nut engaging said screw threads, and a sleeve and a roll on said last mentioned shaft, said roll being engaged with said abutment and said sleeve being engaged with said nut. said roll having a conical bore and said sleeve having spaced extensions tting into said bore, whereby -fsaid n'ut when tightened forces said extensions endwise of the roll to rigidly secure the latter to said shaft.

3. In a machine of the class described, the combination with a pair of housings, of upper and lower shafts mounted therein, a roll mounted on one of said shafts, the other shaft being provided adJacent one end portion with a fixed abutment and adjacent'its other end portion with screw threads, a nut engaging said screw threads, and a pair of elements interposed between and respectively engaging said abutment and said nut, one of'said elements consisting of a sleeve engaging said nut at one end and slidably fitting said shaft, the opposite end portion of said sleeve comprising a plurality of spaced extensions and the other element consisting of a roll engaging said abutment and having a conical bore into which said extensions t, whereby said nut when tightened forces said extensions endwise of the roll to rigidly secure the latter to said shaft.

4. In a machine of the class described, the combination with a pair of housings, of vupper and lower shafts mounted therein, arroll mounted on one of said shafts, the other shaft being provided adjacent `one end portion with a fixed abutment and adjacent its other end portion with screw threads, a nut engaging said screw threads, and

.a pair of elements interposed between and respectively engaging said abutment and said nut, one of said elements consisting of a sleeve one end of which engages said nut, the opposite end portion of said sleeve comprising a plurality of spaced extensions having outer surfaces tapered toward their free" ends, said sleeve slidably fitting said shaft, and the other element consisting of a roll engaging said abutment and having a conical bore into which said extensions fit, said nut when tightened being arranged to force said extensions endwise of the roll to rigidly secure the latter to said shaft.

5. In a machine of the classA described, the combination with a support, of a shaft mounted at its opposite ends in said support, one-end portion of said shaft being provided with a xed abutment and its other end portion being vprovided with screw threads, a roll having a conical bore and surrounding said shaftin engagement with said abutment, a sleeve slidably fitting said shaft, one end portion of said sleeve having an

Images