US2777343A

US2777343A - Tilting table

Info

Publication number: US2777343A
Application number: US237401A
Authority: US
Inventors: Edward T Peterson
Original assignee: Birdsboro Steel Foundry & Mach
Current assignee: Birdsboro Steel Foundry & Mach; BIRDSBORO STEEL FOUNDRY AND MACHINE Co
Priority date: 1951-07-18
Filing date: 1951-07-18
Publication date: 1957-01-15
Anticipated expiration: 1974-01-15

Description

Jan. 15, 1957 Filed July 18. 1951 E. T. PETERSON TILTING TABLE 11 Sheets-Sheet l INVENTOR .Zjfiersoru Jan. 15, 1957 PETERSON 2,777,343

TILTING TABLE INVENTOR ATTORNEYS Jan. 15, 1957 E. T. PETERSON TILTING TABLE 11 Shets-Sheec 5 Filed July 18, 1951 ,1; ian- I.

Jan. 15, 1957 E. T. PETERSON TILTING TABLE INVENTQ 11 Sheets-Sheet 4 Filed July 18. 1951 Jan. 15, 1957 E. T. PETERSON TILTING TABLE 11 Shets-Sheet 5 Filed July 18, 19 51 ATTORNEYS Jan. 15, 1957 E. T. PETERSON 2,777,343

TILTING TABLE Filed July 18, 1951 11 Sheets-Sheet 6 INVENTOIQ E. T. PETERSON 2,777,343

TILTING TABLE 11 Sheets-Sheet 7 INVENTOR NR Q\ Filed July 18. 1951 Jan. 15, 1957 Jan. 15, 1957 E. T. PETERSON 2,777,343

TILTING TABLE Filed July 18, 1951 v 11 Sheets-Sheet s INVENTOR Jan. 15, 1957 E. 'r PETERSON TILTING TABLE 11 Shets-Sheet 9 Filed July 18, 1951 "'IIIII'IIIII INVENTOR 1%221 TTORNEYS Jan. 15, 1957 E. T. PETERSON TILTING TABLE 11 Sheets-Sheet 10 Filed July 18. 1951 v INVENTO'R dzmzizfikmm Jan 15,1957 PETERSON 2,777,343

TILTING TABLE Filed July 18. 1951 ll Sheets-Sheet 11 I I a INVENTOR I United States Patent O i TILTING TABLE Edward '1. Peterson, Reading, Pa., assignor, by mesne assignments, to Birdsboro Steel Foundry and Machine Company, Birdsboro, Pa., a corporation of Delaware Application July 18, 1951, Serial No. 237,401

2 Claims. (Cl. 80-47) g The present invention relates to a tilting table for a rolling mill.

A purpose of the invention is to permit removing a bar on a run-out table through the last pass of a multiple high rolling mill while rolling other bars on other passes of the same mill.

A further purpose is to place a non-tilting run-out table side by side with respect to a tilting table, both operating on the side of the same roll stand.

A further purpose is to mount the table rolls of a tilting table on a comparatively thin bearing support bracket or beam at the side of the table adjoining the non-tilting table, to extend flanges from the bracket or beam inside the ends of the tilting table rolls and to mount hearings on the flanges at the ends of the rolls.

A further purpose is to operate a safety stop from the tilting table to prevent introducing work into the mill which can run under the tilting table when the table is raised.

Further purposes appear in the specification and in the claims.

In the drawings I have chosen to illustrate one only of the numerous embodiments in which my invention may appear, selecting the form shown from the standpoints of convenience in illustration, satisfactory operation and clear demonstration of the principles involved.

Figure 1 is a partially diagrammatic end elevation of a roll stand and side elevation of the cooperating tilting and non-tilting tables.

Figure 2 is a top plan of Figure 1.

Figure 3 is an enlarged vertical transverse section of Figure 1 on the line 3-3.

Figure 4 is an enlarged vertical transverse section of Figure 2 on the line 4-4.

Figure 5 is an enlarged vertical transverse section of Figure 1 on the line 55.

Figure 6 is an enlarged vertical transverse section of Figure l on the line 6---6.

Figure 7 is an enlarged vertical longitudinal section of Figure 2 on the line 77.

Figure 8 is a detail top plan of the hydraulic operating mechanism shown at the left in Figure 5.

Figure 9 is a vertical longitudinal section of Figure 8 on the line 9-9.

Figure 10 is a vertical transverse section of Figure 8 on the line 10-10.

Figure 11 is a vertical transverse section of Figure 8 on the line 11-11.

Figure 12 is a side elevational view of an approach table and associated stop mechanism, partially in section on the line 12-12 of Figure 5.

Figure 13 is a fragmentary plan view of Figure 12.

Figure 14 is a sectional elevational view taken on the line 1-t-14 of Figure 12.

In the drawings like numerals refer to like parts.

Describing in illustration but 'not in limitation and referring to the drawings.

In multiple high rolling mills, commonly three ,high,

for rolling metal bars and the like, especially steel bars, the set of rolls in the roll stand provide a number of passes which are displaced laterally from end to end of the active faces of the rolls and'in some cases are located at difierent heights. The stock being rolled is commonly manipulated by tilting tables, one of which is lowered to receive the stock from the last pass and raised to feed the stock to the next pass at the higher level, while the other at the opposite side receives the stock at the higher level and returns it in the next pass at the lower level.

In the prior practice the tilting table has extended across the full width of the roll stand, and has functioned as a run-out table when the stock is passing through the last pass at one extreme end of the roll stand. This feature has resulted in a loss of efficiency as the table is necessarily held in the lower position during this last pass and cannot feed stock to a pass at a high position. Furthermore, a considerable amount of time on the rolling mill is consumed in running out the last pass, since the bar is then of smallest cross section and of greatest length.

Prior experiments to accomplish the run-out of the bar through the last pass while using the mill to roll on other passes have failed through the inability to provide support for the tilting table rolls if the tilting table is narrowed.

I have discovered that a non-tilting table can be placed at one end of the roll stand to cooperate with the last pass and the tilting table correspondingly narrowed if thin hearing support brackets or a beam is provided along the edge of the tilting table, and flanges from the brackets or beam are carried inside the tilting table rolls to support the roll bearings at that end. In this way it is possible for the tilting table to manipulate shorter bars for rolling through earlier passes while the longest bar is run out through the last pass on a non-tilting table which adjoins the tilting table.

Provision is made in the present invention to raise a stop on one side of the mill to prevent feeding stock to the mill on that side when the tilting table at the opposite side is raised, thus wrecking the tilting table.

As best seen in Figure 1, a multiple high roll stand 20, suitably three high, is shown, having a plurality of passes arranged alternately between the lower roll 21 and the middle roll 22 and between the middle roll 22 and the upper roll 23. These passes progressively extend across the roll stand from one end to the other, and as examples passes 24, 25, 26, 27, 23, 30, 31 and 32 are shown in Figure 4 opposite the tilting table. This showing illustrates only those passes which are at the upper level, and it will be understood that another set of similar passes at the. lower level are provided, terminating in the last pass 33 as indicated by the arrow in Figure 2 which is located beyond the tilting table.

The stock is manipulated for the upper passes 24 to 32 by a tilting table 34. The last pass 33 is run out on a non-tilting table 35 best seen in Figures 2 and 5.

The tilting table 34 comprises a frame 36 extending from end to end and made from structural metal shapes as shown. The frame 36 carries a series of tilting table rollers 37 arranged side by side with the top surfaces in the same plane. Each of the tilting table rollers extends across from one side to the other of the table, and is supported at the end remote from the non-tilting table by a bearing 38 and beyond the bearing is individually driven by a suitably reversible electric motor 40 connected to the roller by a flexible coupling 41.

On the side of the tilting table remote from the motor and adjoining the non-tilting table, at each roll, an upstanding comparatively thin series of brackets or beam 42 is provided mounted at 43 on the bed 36 and each carrying a flange 44 which extends into the end of the roller 37 as best seen in Figure 3 and there mounts a Patented Jan. 15, 1957 3 bearing 45 hich journals he end o he lt ng ta roller. As seen in Figure 3 the tilting table roller desirably comprises an internal: shaft and body portion 46 and a rim 47 secured thereto as by welding.

Lubrication to the bearing 45 is provided through a lubricating opening 48 and lubrication to the bearing 38 is provided through a lubricating opening 50.

It is thus seen that there is very little extension of the tilting table beyond the ends of the tilting table rollers adjoining the non-tilting table in view of the fact that the bearing is located effectively inside the end of the tilting table r l The tilting table is supported at the end remote from the rolling mill on a pivotal shaft 51 best seen in Figures 1 and 3. The pivotal shaft is journalled in bearings 52 on the main emplacement 53 of the tilting table.

At the Opposite end from the pivotal shaft 51 the tilting table is raised and lowered as required by a transverse tilting table lifting shaft 54 supported in bearings 55 on the emplacement of the tilting table, and best seen in Figures 1, ,5, 8 and 11.

The lifting shaft carries crank arms 56 at points heneath the tilting table as best seen in Figures 1, and 6 The crank arms pivotally connect at their outer ends to links 57, the opposite ends of which pivotally connect at 58 to the lower portion of the frame of the tilting table as shown in Figures 1, 5, 6 and 7.

The tilting table lifting shaft 54 is turned to raise the tilting table by an hydraulic or pneumatic cylinder 60 as shown in Figures, 8 and 9, having a piston rod 61 which connects to a cross head 62 which moves in cross head guides 63 best seen in Figures 8, 9 and and pivotally connects at 64 to an adjustable link 65 which makes pivotal connection at 66 with the end of a crank arm 67 on the shaft 54.

The counterbalancing of the weight of the tilting table is accomplished by an hydraulic or pneumatic counterbalancing cylinder 68 having a piston rod 70 which connects to a cross head 71 moving in cross head guide 72. The cross head guide 72 pivotally connects at 73 with a link 74 which pivotally connects at 75 with the outer end of a crank arm 7'6 also secured on the shaft 54.

The tilting table is optionally provided, as shown, with a drag over as described in my U. S. Patent 2,334,026, granted November 9, 1943 for Tilting Table. There are drag-over

abutments

77, 78 and 30 and a stationary outer guard 81 as best seen in Figures 2 and 6. The outer guard 81 preferably comprises an upper extension from the bearing supporting brackets or beam.

Between the tilting table rollers as best seen in Figures 2 and 7, are positioned

transverse tracks

82, 83, 84 and 85, each of which comprises opposed rails 86 and 87 as best seen in Figure 7 and vertical guideways 88 on either side of the track space above the rails.

Each of the tracks contains a carriage 90 which is provided with spaced axles 91 having bearings 92 supporting rollers 93 moving in the rails 86 and 87. Each carriage has upstanding guide surfaces 94 which engage vertical guideways 88 of the tracks.

The carriages in

tracks

82 and 85 mount drag-over abutment 80, while those in

tracks

33 and 84 mount dragover abutments 77 and 78. The interconnection of the carriages with the drag-over abutments is accomplished by bolts 95.

The carriages are desirably moved in pairs, the carriages in

tracks

82 and 85 being manipulated by a shaft 96 running longitudinally on the frame (Figures 1 and 6) while the carriages in

tracks

83 and 84 are operated by hollow shaft 97 surrounding shaft 96 (Figures 1 and 4). The shafts are supported in bearings 98.

Shaft 96 extends at either end beyond shaft 97 and near the ends carries crank arms 100 at positions corresponding to the carriages in tracks 82 and85. Each of the crank arms 100 is pivotally interconnected with the corresponding carriages best seen in Figure 6. The shaft 96 is provided with a crank arm 102 in bell crank 4 relation to crank arm 100, which near its outer end pivotally connects with an anchor rod 103 which pivotally interconnects with anchor 104 secured to the foundation.

Shaft 97 which surrounds shaft 96 is similarly interconnected to its carriages by crank arms 105 (Figures 1 and 4) which pivotally interconnect with links 106 (Figure 4). Crank arm 107 on the shaft in hell crank relation to crank arm 105 (Figure 4) pivotally interconnects with pull rod 108 which is pivotally secured to the foundation by anchor 110.

The pull rods are made adjustable so that different throws can be obtained for different drag-over abutments by threaded adjustments 111 on the rods (Figure 4).

The non-tilting table as shown in Figure 5 which is used as a run-out for the last pass conveniently comprises supports 112 (Figure 5) mounting drives 113 which support rolls 114 conveniently having bearing support at 115 at one end, By reason of the fact that these rolls are short, they can have their bearing support entirely at o e nd. r

The shaft 54 which raises the tilting table carries at one end a crank 115 which pivotally connects at 116 with a pull rod 117 which extends under the bed 118 of rolling mill 20 to the side of the mill opposite to the tilting table, having approach table 120 provided with approach table rolls 121. At the opposite end, pull rod 117 pivotally connects at 122 with crank arm 123 on shaft 124 in bearings 125 on the foundation. Cranks 126 on shaft 124 pivotally connect at 127 with connecting rods 128,. The connecting rods extend upwardly and at their tops pivotally connect at 130 with stop 131 which is guidedfor vertical movement in guides 132. Thus when the tilting table is raised at the opposite side of the mill, the stop 131 is raised to prevent work from entering the approach table.

In operation the stock is brought to the mill and moved through the first pass, the tilting table being manipulated by the shaft 54 and link 57 to cooperate with the rolling of the first pass. At the same time the runout of the stock of the previous rolling sequence leaving the last pass 33 is carried over the non-tilting table.

Each time the tilting table, receives the stock at lower position and is raised to the higher position, the carriages and dragrover abutments move the stock the correct distance laterally to line up with the next pass. The tilting table roll motors are then driven in the correct direction to start the stock through the next pass.

Each time the table is lowered, the dragrover abutments are retracted to move the carriages back.

Every time the tilting table rises the stop is raised at the opposite side of the mill to prevent running stock into the mill under the tilting table and thus wrecking the tilting table.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain all or part of the benefits of my invention without copying the structure shown, and I, therefore, claim all such insofar as they fall within the reasonable spirit and scope of my claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a rolling mill, a multiple high roll stand, a tilting table on one side of the roll stand, a stop on the opposite side of the roll stand and mechanism interconnecting the tilting table and the stop to raise the stop on the one side of the roll stand when the tilting table is raised on the opposite side.

2. A rolling mill transfer table comprising a stationary table portion and a tilting table portion closely placed laterally and adapted to cooperate in manipulating the work from successive passes, the tilting table portion comprising a plurality of tilting table rolls distributed lengthwise, a bracket extending longitudinally from one end of the tilting table rolls and having a relatively thin the portion extending up beyond the ends of the tilting tab-1e rolls and above the same, thereby to form a common side guard for the tilting table portion and the adjoining stationary table portion, flanges extending out at intervals from the relatively thin portion of the bracket and ex- 5 tending inside the adjoining end of each tilting t-able roll, first bearings journalling the tilting table rolls and supported -on the flanges inside the ends of the tilting table rolls, seoond bearings on the opposite ends of the tilting table rolls and supports for the second bearings on 10 the tilting table port-ion.

UNITED STATES PATENTS Lentz Nov. 4, Kennedy Apr. 2, Claassen Dec. 21, Reeve Dec. 8, Delany June 27, Peterson Nov. 9,

FOREIGN PATENTS Germany Dec. 23,