US1568905A - Apparatus for rolling sheet-metal pipe - Google Patents

Description

Jan. 5 1926.

I M. J. MuNRc APPARATUS FOR ROLLING SHEET METAL PIPE` 2 Shets-Sheet l Filed July 5, 1924 Invenror Jan. 5 ,1926. 1,568,905"Y M. J. MUNROv APPARATUS FOR ROLLING SHEET METAL PIPE Filed July 5, 1924 2 sheets-sheet 2 FIG 3 Invenor Patented Jan. 5, 1926.

.,UNiTl-:n stares Par-sur euries.

MURDO JOHN MUNRO, OF HAMILTON, ONTARIO,1CANADA.`ASSIGNOR OF ONE-HALF TO GEORGEBOBERT PETRIE, .OF BURLINGTON, CANADA.

i APPARATUS FOR ROLLING SHEET-METAL PIPE.

L Application filed July 5,

To all whom 'it mag/ concern.'

Be it known that I, MURDO JOI-IN MUNuo, a subject of the King of Great Britain, and a` resident of the city of Hamilton, county of lentworth, Province of Ontario, Doj minion of Canada, have invented certain new and useful Improvements in Apparatus for Rolling Sheet-Metal Pipe, of which the following is the specication.

My invention relates to improvements in apparatus for rolling sheet metal pipe, such asvstovepipe, and the object of the invention is to devise means whereby this class of pipe .may be safely rolledin high speed power-driven rolls, thus greatly increasing speed of production and reducing manufac turing cost.

My invention consists essentially of a power-driven pipe rolling apparatus pro* vided with means for preventing the stock from re-entering the rolls, all as hereinafter more particularly described and illustrated in the accompanying` drawings in` which:

Fig. 1 is an end elevation of a pipe rolling apparatus constructed according to my invention looking in the direction of the arrow in Fig. 2.

Fig. 2 is a front elevation thereof, the left hand side being shown in section on the staggered line 2-2 of Fig. `1.

Fig. 3 is a section on the line 3 2 to an enlarged scale.

Fig. 4 is a detached perspective view of a guard apron used in my invention.

In the drawings, like characters f reference indicate corresponding parts in the diiferent views.

My invention consists of a pipe rolling apparatus, indicated collectively at 1, and `eomprising a main frame 2 in which is` mounted, in fixed bearings, a lower shaft 3.

Vertioally above the shaft 3 is an upper shaft 4 jourualle'd in bearing blocks 5 which are adjustable vertically in guide-ways 6 in the frame 2, threaded spindles 7 controlling this adjustment.

A shaft9 is journalled in vertically adjustable bearing blocks 8 at the rear of the machine, the bearing blocks 8 being slidable in vertical guide-ways 10 in the frame 2 3 of Fig.

1924. serial No. 724,415.

and 11 are threaded spindles controlling n the adjustment of the blocks 8.'

Mounted upon the parallel shafts 3,` 4z

and `9 respectively are rolls 12, 13 and 14.

From the foregoing it will be noted thatl Mounted upon one end of the ushafts 3y and 4 are intermeshing gears 15 and 16 respectively, while the end of the shaft 3 carries fast and loose spectively. A. .5

Itl will thus beseen that the lower and upper rolls 12 and 13 aredriven from the shtlft 3 whereas the rear roll 14 is an idler ro `Mounted upon the main frame 2 at the front thereof, is an inclined stock-supporting table 19 which is supported upon bracl ets 20 secured to the main frame.

The table 19 is inclined downwardly and forwardly from the entrance or mouth of the rolls 12 and 13.

Secured to the main frame 2 by brackets 21 is an apron 22 which forms a protecting cover for the top and front of the upper roll 13. This apron extends downwardly in front of the roll 13 and terminates in a forwardly disposed stepped portion 23, the horizontal portion 24 of which is disposed slightly above the bottom `of the upper roll 13 and the front flange 25 of which extends downwardly into spaced relation above the table 19 so as to form a gap 26 between the table and said flange through which the stock 27 may pass to enter the rolls.

In Fig. 3 a sheet of metal which has partially passed through the rolls to be formed into a pipe is indicated in full linesI at 27 while in Fig. 1 this is indicated in broken lines and in Fig. 2 this stock is omitted entirely.

The construction and operation of my invention is as follows:

The rolls 13 and 14 would be adjusted for the desired' gauge of sheet being rolled. This adjustment of the rolls 13 and 14 follows standard practice and is not a feature of my present invention.

The stock to be rolled is fed from the pulleys 17 and 18 re` l.

table 19 into the rolls and by having this table inclined upwardly towards the entrance or mouth of the rolls, the stock is -assured of passing` upwardly upon the idler l Q3 and be supported thereby, and no matter how long the rolls may continue to rotate after the sheet has passed therethrough, said sheet can4A not positively re-enter the rolls.

It will thus be observed that the apron 22 with its step 23 constitues a guard disposed in front of the entrance to the rolls which guard provides means for positively preventing the sheet from rc3-entering the rolls.

Hitherto theA rolling,` ot' stove pipe has been done entirely upon hand-driven machines at low speed, since it has not been possible to carry out this operation at high speed due to the danger to the hands of the operator and to the iact that the pipe reenteled the rolls when high speed rolling was attempted.

By my invention these disadvantages have been entirely overcome and by its use sheet metal pipe may be rolled in high speed power-driven rolls, thus greatly increasing speed of production and lowering manufacturing cost.

W'hat I claim as my invention is:

In apparatus for rolling sheet metal pipe, the combination with the vtrame of the apparatus, and the rolls mounted therein, of a stock supporting table supported by the frame and inclined downwardly and forwardly from the entrance to the rolls, an apron rigidly secured upon the frame and forming a protecting cover for the top and front of the upper roll, said apron formed at its lower 'front edge with a forwardly disposed step located in front of the en trance to thev rolls, the front flange of said step extending into spaced relation above the table to form a gap between the table and said flange.

MURDO JOHN MUNRO.

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