US2058717A

US2058717A - Break-down mill

Info

Publication number: US2058717A
Application number: US684181A
Authority: US
Inventors: Paterson Alexander
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-08-08
Filing date: 1933-08-08
Publication date: 1936-10-27
Anticipated expiration: 1953-10-27

Description

A. PATERSON Oct. 27, 1936.

BREAK-DOWN MILL 2 Shee'ts-Sheet 2 Filed Aug. 8, 1933 33 w/ UH; a Z W w W INVENTOR alexarlfir felzsaa ATTORN EYS Patented Oct. 27, 1936 UNITED STATES PATENT OFFICE BREAK-DOWN MILL Alexander Paterson, Buffalo, N. Y.

Application August 8, 1933, Serial No. 684,181 12 Claims. (Cl. 80-55) This invention relates to an improved breakby to enable conditioning of the mill to meet down mill for use in sheet and tin plate rolling different rolling requirements.

and more particularly the invention involves im- A still further object is to provide a mill which provements in the mill disclosed and claimed in is convertible to accommodate different roll 6 my Patent No. 1,804,111, granted May 5, 1931. combinations.

The mill covered by my said patent includes Embodiments of the invention are illustrated one or more units which are characterized by in the accompanying drawings, in which: opposed integral housings, each having windows Figure 1 is a view in elevation of a mill unit for a multiple arrangement of roll sets together in which features of the invention are incorpowith means intermediate the sets and successiverated.

lyco-operating with each of them for feeding and Figure 2 is a front view of the mill part, in guiding the piece to be rolled. The piece is caused section and part in elevation. to move continuously forward through the suc- Figure 3 is a perspective view of a roll frame. cessive roll passes, the means intermediate the Figure 4 is a view similar to Figure 1 of a modireducing passes engaging the piece before it fied form of mill unit. 15

leaves the pass behind and directing it to the Figure 4a is a section through one of the pass in front and remaining in engagement with wedges by which the roll frame is secured in its it until it has entered the rolls of the pass to housing, the said section being taken along line which it is directed. In this way a square or 4a4a of Figure 1,

2o true feed of the piece is assured as is also the Figure 5 is a view similar to Figure 4 of a 2 automatic passage of the piece through the series further modified form of mill unit. of rolls sets, the last set of rolls reducing the v Figure 6 is a perspective view of the roll frame piece to a predetermined cross-section. The employed in connection with the embodiment mill has the advantage that the reduction of shown in Figure 5.

the piece is accomplished more rapidly than has The mill unit, as illustrated in Figure 1, in- 25 heretofore been possible, the close proximity of eludes two sets of three-high rolls which are the various sets of rolls of the reducing passes mounted in housings I0 arranged in opposed reassuring passage of the piece through the mill lation in the usual manner. Each housing is of at such a rate as to eliminate, to a substantial integral constructionand is formed with a cendegree, heat losses. The capacity of the mill is, trally located opening II. The sets of rolls are 30 therefore, high. The multiple Window housings similar to one another and each consists of an not only enable a closer arrangement of the sets upper roll l2, an intermediate roll l3 and a lower of reducing rolls than has heretofore been possiroll I4. As shown, the upper roll 12 and the ble but they also have greater strength for the intermediate roll I3 are employed to roll th support of the rolls and for taking up the stresses piece while the lower roll reinforces .the inter- 35 that may be developed. mediate roll E3. The rolls may be driven in any In the various illustrated embodiments of the suitable manner. The piece is directed from present invention the mill is shown as compristhe working pass of one set of rolls to the working a single unit. It is to be understood, howing pass of the succeeding set of rolls by sheet 40 ever,that while a single unit may be adequate, feeding and guiding means arranged between the 40 (assuming the nature of the work permits suitsets of rolls and consisting of a feed roll [5 and able reduction in the number of passes thus proa weighting roll IS, the feed roll being driven in vided) for ordinary use with pieces commencing any suitable manner. In its travel through the in size at the sheet bar stage, two units will be passes of the unit the piece is engaged by th preferred and in such case suitable feedin and feed and weighting rolls l5 and I6 respectively, 45 guiding means may bev provided intermediate just before it is discharged from the first set of and in co-operation with the units as disclosed working rolls and is fed forward until it enters in my said Patent No. 1,804,111. the second set of working rolls, the said feed and One object of the invention is to provide for weighting rolls maintaining engagement with th facility in removing and replacing the rolls of piece until it is engaged by the second set of 50 the mill without the necessity of disturbing the working rolls. whereby to assure a square or housings 'thereof. true feed of the piece. The rolls i5 and it are A further object is a mill of the type generpreferably employed in connection with a guide ally described in which provision is made for actable or plate H which bridges the space hecommodating rolls of various diameters, wheretween the passes of the two sets of rolls. 55

In accordance with the invention means is provided for facilitating removal and replacement of the rolls of the unit. To this end a frame I8 is arranged in each of the openings i I. The frame is supported upon a centrally located rib is and overlies shoulders 20, the said rib and shoulders being located in substantially the same horizontal plane. A division bar 2! of the said frame co-operates with

side bars

22 and 23 there of to provide

windows

24 and 25 in which the necks of the working rolls l2 and I3 are fitted, the rib l9 dividing the lower part of the opening ll into

supplemental windows

26 and 26a for the necks of the backing rolls l4. Brasses 21 for the upper rolls and 28 and 28a for the intermediate rolls are carried by the frame l8 while brasses 29 for the lower rolls are carried directly by the housings. The division bars 2| of the frames l8 may, as illustrated, be formed with opposed openings 2m to accommodate the shafts of the feed and weighting rolls l5 and I5 respectively. The said bars may also be formed with shoulders 2H) for the support of the guide table or plate H, the latter being carried by a bar I1a which is positioned in grooves 2 le formed in the said shoulders. The top bar 30 of the frame is formed with openings 3| through which the adjusting screws l9 extend, the said screws co-operating with conventional bearing blocks 32 which carry brasses 34 for engagement with the necks of the rolls l2. The blocks 32 are mounted for vertical adjustment in guideways 33 which are formed in the division and side bars of the'frame.

The frame I8 is removably secured in the opening H by elements 35 (Figures 1 and 4a). The latter includes wedge-like shanks 36 which extend between the side walls of the opening II and the

side bars

22 and 23 of the frame. Preferably the shanks 36 of the elements fit in recesses Ilia WnlCh are formed in the side walls, the said recesses having inclined bottom walls lob to compensate for the taper of the shanks. The elements include laterally extending heads 37 and are carried from the housings I0 by bolts 38 which pass through suitable openings formed in said heads. Nuts 39 which are carried by said bolts are adjustable to force the wedge-like shanks of said elements into the space between the frame and the housing, thereby to secure the frame rigidly in the opening II.

It will be apparent that the frames l8 may be removed from the housings by loosening the nuts 39 and withdrawing the elements 35, it being understood that the adjusting screws l9 are first withdrawn from the openings 3| in the top bars of the frames. Upon removal of one of the frames I 8 either or both of the working rolls l2 and i 3 may be withdrawn axially through the opening ll without disturbing the housings l0 and without necessitating the removal of the frame of the companion housing. It is understood, of course, that the removal of the working rolls may be necessary for a number of reasons, for example, it may be desired to recondition the rolls or to replace them with new ones, it being understood that in the latter instance the new rolls may be of the same or different diameters with respect to the original rolls.

The lower rolls l4 serve only to reinforce the intermediate or working rolls l3. As the wear upon these rolls is slight, the necessity for changing them will seldom arise. They may, however, be removed by lifting them and then withdrawing them axially through that part of the opening II from which the frame has been removed. In

this connection it is to be understood that in the removal of the various rolls either or both of the frames l8 may be removed. The invention also contemplates the use of a frame in only one of the housings in the event that the characteristics of the rolls are such that they may be removed and replaced in the manner desired by the removal of the frame. Preferably, however, there will be a frame employed in connection with each of the housings.

The intermediate or working rolls l3 wear considerably faster than either of the upper or lower rolls. Means is provided, therefore, whereby these rolls may be removed from the housings without the necessity of disturbing the housings or removing either of the frames 48. To this end the brasses 28 are carried by blocks 40. The latter are secured in any suitable manner in recesses 4011 which are formed in the side bars of the frames. When the blocks are.removed the recesses thus provided increase the width of the

windows

24 and 25 to such an extent that the rolls when lifted and moved laterally with respect to their normal position can be withdrawn axially through the windows, it being understood that in the removal of the rolls in this manner parts of the roll bodies pass through the said recesses. In this connection it will be noted that the shanks of the elements 35 are located directly behind the brasses of the various-rolls. Hence any lateral thrusts of the rolls will be transmitted through the brasses and elements directly to the housings.

From the foregoing it will be noted that provision is made for removing and replacing the various rolls of the mill without the necessity of disturbing the housings. Such removal and replacement can be effected conveniently and with facility. In the event that such replacement or removal involves only the intermediate or lower working rolls I3 this can be done not only without disturbing the housings l0 but also without necessitating the removal of either of the frames I8. It is to be understood that although the lower rolls H are referred to as backing rolls, the said rolls may, if desired, be availed of in connection with the intermediate rolls to provide a reducing pass. It is to be understood further that the invention contemplates the use of a removable frame in only one of the housings if this is desired, it being apparent that the withdrawal of the various rolls in the manner described can be effected by removing a single frame. When a single frame is employed the rolls of course will be withdrawn through the opening in the housing occupied by the frame.

Means is provided whereby the mill unit illustrated in Figure 1 may be converted into a two high unit. A unit of this type is illustrated in Figure 4. It includes two sets of two-high rolls which are mounted in housings 4| arranged in opposed relation. The said housings are similar to the housings illustrated in Figure 1 and each is formed with a centrally located opening 42. Each of the sets of rolls includes an upper working roll 43 and a lower working roll 44. A frame 45 which is located in the opening 42 is formed with a division bar 46, the latter co-operating with the side bars 41 and 48 of the frame to provide windows 49 and 50. Brasses SI for the upper rolls are carried by the frames 45. The lower working rolls 44 are fitted in supplemental windows 52 and 53 which comprise the lower part of the openings 42 and which are formed by ribs 54. The brasses 55 for the lower working rolls are carried directly by the housof three-high rolls which ings.

. and 69 Elements 66 are adapted to secure the frame 45 in the opening I! as described in connection with the embodiment shown in Figure 1. Adjusting screws 61 pass through openings 58 formed in the top bar 69 of the frame and. co-operate with bearing blocks 60 to control the pass provided by the working rolls, the said hearing blocks carrying brasses 6| which engage the necks of the upper rolls. The said blocks are mounted in suitable guideways 62 which are formed in the said frames and which are adapted to permit vertical movement of the blocks as determined by the adjusting screws 61. In this embodiment the bearing blocks 66 for the upper rolls, as distinguished from those shown in Figure 1, are elongated, the said blocks serving to adapt the housings to two-high sets of rolls. It will be apparent, therefore, that by the use of different frames and bearing blocks the same housings may be adapted to acconmiodate different roll combinations. It will be noted that in this embodiment a sheet feed mechanism is not employed in connection with the working rolls, it being within the contemplation of the invention that when circumstances permit the piece may be fed by the first set of rolls directly to the succeeding set of rolls, the piece in this instance being engaged by the former until it enters the latter.

In the embodiment shown in Figure the mill which is illustrated is generally similar to the mill illustrated in Figure 1. It includes two sets are mounted in housings 63 arranged in opposed relation in the usual manner. Each housing is of integral construction and is formed with a centrally located opening 64. The sets of rolls are similar to one another and each consists of an upper roll 66, an intermediate roll 66 and a lower roll 61. As described in connection with Figure 1 the upper rolls 65 and the intermediate rolls 66 are employed to roll the piece while the lower rolls 61 reinforce the intermediate rolls 66. It is to be understood, of course, that the rolls 6'! are, if desired, available for cooperation with the rolls 66 to provide reducing passes. The windows 68 for the upper and

intermediate rolls

65 and 66 respectively are provided by a frame which is arranged in the opening 64. The said frame includes upper and lower bars II and 12 respectively and a division bar 13. The lower part of the opening 64 is divided by a rib 14 into supplemental windows and 16 for the lower rolls 61. The frame 16 is supported upon the rib l4 and it is removably secured in the opening 64 by elements 11. The latter are similar to and function in substantially the same manner as the elements 35 shown in Figure 1. In the present embodiment the elements co-operate with the ends of the bars II and I2.-

Brasses I8, 19 and 80 are employed in connection with each of the upper rolls 65, the brasses 16 being carried directly by the housings 63 while the brasses 19*are carried by the division bars 13. The brasses 80 are carried by bearing blocks M which co-operate with the adjusting screws 82 to control the degree of reduction, the said screws passing through openings I la formed in the top bars H of the frames. Brasses 83 and 84 for the intermediate rolls 66 are carried by the housings and division bars respectively while brasses 15a for the lower rolls are carried by the housings.- In this embodiment the brasses as are carried by blocks 86. The latter are removably secured in any suitable manner inre- From the foregoing it will be apparent that.

mill units constructed in accordance with the invention have the advantage that the rolls may be removed, replaced or interchanged as occasion may require without the necessity of disturbing the housings. Afurther advantage obtained is that the housings are adaptable to accommodate different roll combinations, it being understood in this connection that the frames --which are employed for this purpose may be of various forms, those illustrated being by way of example only.

I claim as my invention:

1. A breakdown mill including an integral housing formed with a pluraltiy of windows, a companion housing formed with an opening, a frame located in said opening, said frame having a central bar which divides said opening into a plurality of windows which register with the windows of said first mentioned housing, a set of rolls fitted in each pair of registering windows, and means carried by said central bar for feeding a sheet metal section from one set of said rolls to a companion set, said frame being removable to enable removal of said rolls without disturbing said housings.

2. A breakdown mill including an integral housing formed with a plurality of windows, a companion housing formed with an opening, a. frame arranged in said opening, said frame having a central bar which divides said opening into a plurality of windows which register with the windows of said first mentioned housing, a set of rolls fitted in each pair of registering windows, brasses for said rolls carried by said central bar, means carried by said central bar for feeding a sheet metal section from one set of rolls to a companion set, and means for removably securing said frame in said opening, whereby to enable removal of said rolls without disturbing said housings.

3. .A breakdown mill including an integral housing formed with a plurality of windows, a companion housing formed with an opening, a

frame arranged in said opening, said frame havwithdrawal of one of. said rolls axially through said window without disturbing said frame or i said housings.

' 4. A breakdown mill including an integral housing formed with a plurality of windows, a companion housing formed with an opening, a frame arranged in said opening, said frame. including side bars and a central bar, the latter dividing the frame into a plurality of" windows which register with the windows of said first mentioned housing, a set of rolls fitted in each pair of registering windows, means carried by said central bar for feeding a sheet metal section from one set of said rolls to a companion set, and wedges co-operating with the said side bars for removably securing said frame in said opening, whereby said rolls can be removed without disturbing said housings.

5. A breakdown mill including an integral housing formed with a plurality of windows, a companion housing formed with an opening, a frame arranged in said opening, said frame including a top bar and a central bar, the latter dividing said opening into a plurality of windows which register with the windows of said first mentioned housing, a set of rolls fitted in each pair of registering windows, means carried by said central bar for feeding a sheet metal section from one set of said rolls to a companion set, means for removably securing said frame in said opening, whereby to enable removal of said sets of rolls without disturbing said housings and adjusting screws carried by said housings for controlling the passes provided by said rolls, said top bar being formed with openings through which said screws extend.

6. A breakdown mill including an integral housing formed with a plurality of windows, a companion housing formed with an opening, a frame arranged in said opening, said frame including top and bottom bars and a central connecting bar, the latter dividing said opening into a plurality of windows which register with the windows of said first mentioned housing, rolls fitted in each pair of registering windows, means for removably securing said frame in said opening, whereby to enable removal of said rolls without disturbing said housings and co-operating pairs of brasses which engage opposite sides of the necks of said rolls, one of each pair of said brasses being carried by said central bar and the other of said pair being carried by awall of said housing.

7. A breakdown mill including an integral housing formed with a plurality of windows, a companion housing formed with an opening, a frame arranged in said opening, said frame including top and bottom bars and a central connecting bar, the latter dividing said opening into a plurality of windows which register with the windows of said first mentioned housing, rolls fitted in each pair of registering windows, said rolls being of a diameter greater than the width of said windows, means for removably securing said frame in said opening, whereby to enable removal of several of said rolls without disturbing said housings and a member carried by one of said housings and which is removable to increase the width of a window, whereby to enable withdrawal of one of said rolls axially through said window without disturbing said frame or said housings.

8. A breakdown mill including a housing formed to provide a plurality of windows, a companion housing formed with an opening, a frame in said opening which divides it into a plurality of windows which are located opposite the win dows of said first mentioned housing, a plurality of pairs of rolls, each of said windows accommodating the necks of a pair of said rolls, means for removably securing said frame in said companion housing, whereby it may be removed to permit removal of several of said rolls without disturbing said housings and bearings which engage the ion housing,

sides only of said roll necks, the windows provided by said frame being unobstructed between said bearings, one of said bearings being removably secured in position, whereby it may be removed to enable removal of one of said rolls without the necessity of removing said frame.

9. A breakdown mill including a housing formed to provide a plurality of windows, a companion housing formed with an opening, a frame in said opening which divides it into a plurality of windows which are located opposite the windows of said first mentioned housing, a plurality of pairs of rolls, each of said windows accommodating the necks of a pair of said rolls, means for removably securing said frame in said companwhereby it may be removed to permit removal of several of said rolls without disturbing said housings and bearings carried by said frame which engage the sides only of said roll necks, the windows provided by said frame being unobstructed between said bearings, one of said bearings being removably secured in said frame, whereby it may be removed to enable removal of one of said rolls without the necessity of removing said frame.

10. A breakdown mill including a housing formed to provide a plurality of windows, a companion housing formed with an opening, a frame in said opening, said frame including side bars and a central bar which divide said opening into a plurality of windows which are located opposite the windows of said first mentioned housing, a plurality of pairs of rolls, each of said windows accommodating the necks of a pair of said rolls, means for removably securing said frame in said companion housing, whereby it may be removed to permit removal of several of saidrolls without disturbing said housings and bearings carried by said bars which engage the sides only of said roll necks, the windows provided by said frame being unobstructed between said bearings, one of said bearings being removably secured in said frame, whereby it may be removed to enable removal of one of said rolls without the necessity of removing said frame.

11. A breakdown mill including a housing formed to provide a plurality of windows, a companion housing formed with an opening, a frame in said opening, said frame including side bars and a central bar which divide said opening into a plurality of windows which are located opposite the windows of said first mentioned housing, a plurality of pairs of rolls, each of said windows accommodating the necks of a pair of said rolls, means for removably securing said frame in said companion housing, whereby it may be removed to permit removal of several of said rolls without disturbing said housings, bearings carried by said bars which engage the sides only of said roll necks, the windows provided by said frame being unobstructed between said bearings and means for removably securing one of said hearings in said frame, whereby it may be removed to enable removal of one of said rolls without the necessity of removing said frame, said means including a block which fits in a recess formed in one of said frame bars and which is removable to increase the width of the window which accommodates the neck of the said roll.

12. A breakdown mill including a housing formed to provide a plurality of windows, a companion housing formed with an opening, a frame in said opening, said frame including side bars and a central bar which divide said opening into a plurality of windows which are located opposite the windows of said first mentioned housing, a plurality of pairs of rolls, each of said windows accommodating the necks of a pair of said rolls,

means for removably securing said frame in said companion housing, whereby it may be removed to permit removal of several of said rolls without disturbing said housings, bearings carried by said side bars which engage the sides only of said roll necks, the windows provided by said 10 frame being unobstructed between said bearings and means for removably securing one of said bearings to one of said side bars, whereby it may be removed to enable removal of one of said rolls without removing said frame, said means including a block which fits in a recess formed in one of said side bars and which is removable to increase the width of the window which accommodates the neck of the said roll.