US1688480A - Straightening machine - Google Patents

Description

Oct. 23, 1928. I

' G. A. WISE STRAIGHTENING MACHINE 6 Sheets-Sheet 1 Filed Aug. 14, 1926 SW7 m N T m m Aflw e m N 0 h m G M ID Oct. 23, 1928. 1,688,480

G. A. WISE S TRAIGHTENING MACHINE Filed Aug. 14, 1926 6 Sheets-Sheet 2 INVENTOR'.

George A Wise 1, 391W l'L/S afforrleq Oct. 23, 1928. 1,688,480

G. A. WISE STRAIGHTENING MACHINE Filed Aug. 14, 1926 6 Sheets-sheet 3 FIG.

INVENTOR:

Georye A. Wise 1, mww a Wm his afffarn Oct. 23, 1928.

G. A. WISE STRAIGHTENING MACHINE Filed Aug. 14. 1926 6 Sheets-Sheet 4 his afforne Oct. 23, 1928. 1,688,480

G. A. WISE STRAIGHTENING MACHINE Filed Aug. 14, 1926 6 Sheets-Sheet 5 FIG. 6

FIG. 7

INVENTOR:

George A. Wise by 47% his Qff'f'OTrfea Oct. 23, 1928.

G. A. WISE STRAIGHTENING MACHINE 6 Sheets-Sheet 6 Filed Aug. 14, 1926 George A. Wise by h; s afforvez Patented Oct. 23, 19 28.

UNITED STATES PATENT OFFICIE.

GEORGE A. WISE, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO SUTTON-ABRAH- SEN ENGINEERING COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

STRAIGHTENING MACHINE.

Application filed August 14, 1926. Serial at. 129,163.

This invention relates to a machine for straightening round sections, such as pipes, bars and the like, and constitutes an improvement on the device shown anddescribed in the patent to Petter B. Abramsen, No. 1,087,- 281, dated. May 19, 1914. In straightening round sections by the use of contoured cross rolls it is highly desirable that. the stock should have a line rather than a point contact with the face of the driven roll. This is for the reason that a point contact between the rolls and the stock tends to impose a spiral grooving or marking which is objectionable.

In the machine to which the present improvement is applied the stockis passed be tween two or more sets of cross rolls with an intermediate pressure roll between each of the pairs of cross rolls. Each pair comprises a driven roll having a contoured face, and a shorter idler roll opposed to the long driven roll. In order to secure a maximum line con tact with the contoured face of the long roll for the diameter of the stock, it is necessary that the rolls of each pair be disposed at a suitable angle.

The structure of the straightening machine as a whole is such that the driven rolls cannot be swivelled for an angular adjustment with out greatly complicating the mounting and driving mechanism of such rolls.

Une object of the invention is to provide mounting means for-the idler roll of each pair of cross rolls so arranged that this roll may be readily adjusted to accommodate for variations in the diameter of the stock.

Another object of the invention is to provide means whereby the position of the rolls may be regulated to compensate for irregularities in the turning of the rolls.

In the accompanying drawings Figure 1 is a plan view of a complete straightening machine; Figure 2 is a side elevation of the same; Figure 3 is a cross sectional view taken on the line 33 of Figure 2; Figure 4 is an isometric view of the bracket and yoke for one of the idler rolls; Figure 5 is a similar View taken from a different angle; Figure 6 is a side elevation of the yoke for an idler roll; Figure 7 is a bottom plan view of the yoke; Figure 8 is a bottom plan view of a roll yoke of modified form; and Figure 9 is a side elevation of the same modified roll yoke.

In the drawings the reference numeral 1 designates the base of the straightening machine which supports the frame 2 for housing the rolls and provides bearings for their driving mechanism. The long driven rolls 3 and 4 are carried respectively by shafts 5 and 6 mounted in fixed bearings 7 and 8. The main shaft 9 of the machine carries bevel pinions 10 and 11 which mesh with bevel pinions 12 anal 18 mounted respectively on the shafts 5 an 6.

Mounted opposite the driven rolls 3 and 4 are idler rolls 14 and 15 arranged to oppose and cooperate with the driven rolls. These idler rolls are relatively short in comparison with the long contoured rolls which are positively driven. Between the two sets of rolls 3 and 14 and 4 and 15 is an intermediate pressure roll 16, which is of the same general form as the idler rolls 14 and 15. Each of the idler rolls, and also the intermediate pressure roll, is mounted in a yoke 17 carried by a bracket 18. Each of the brackets 18 is slidably mounted transversely of the machine in guideways 19, and is adjustable by means of an adjusting screw 20 carrying a hand wheel 21. This structure provides for an adjustment of each of the idler rolls toward and from its opposed driven roll. The adjustment of the intermediate pressure roll also provides for its adjustment toward and from the longitudinal axis of the stock undergoing the straightening operation.

It will be noticed that the rolls 3 and 4 are constructed with a reducing taper from each end toward the center,wh1le the idler rolls 14 and 15 are approximately opposite the reduced center of these driven rolls.

In straightening a round section the stock is forced by the first pressure roll into engagement with the contoured face of the first driven roll 3, this pair of rolls serving to feed the stock and to initially impart a rotating movement thereto. The stock in its passage is subjected to the deflecting action of the intermediate pressure roll, and enters the pass be tween the final rolls 4 and 15.

In order to avoid drag on the bars, and to prevent marking, it is necessary that the mutual relation of the rolls of each pair be such that the stock in following the contour of the longer driven roll has a line contact with its face. The mutual angle of two cross rolls of the pair which would serve to secure adequate line contact for round stock of one diameter would not serve to secure an adequate line contact for round stock of even slightly dif ferent diameter.

In order to provide an angular ad ustment of the rolls each of the idler roll yokes has a swivelled mounting in its bracket, and each yoke has further a tiltable adjustment in the bracket.

In order to effect these adjustments each of the idler yokes 17 has therein aplurality of curved slots 22 for'receiving bolts 23 to secure the yoke in position on the bracket. This provides an independent swivelling of each of the idler rolls to independently regulate its angular adjustment with respect to its opposed driven roll.

In order to provide a further adjustment thebottom face of the roll yoke, shown in Figures 5 to 7 inclusive, is rounded off on one side of the yoke, in order to permit a slight rocking movement; and at the other side of the yoke are means for tilting it relatively to its bracket. Such means comprise an inclined slot 24 cut in the under face of the yoke, and a wedge 25 arranged to lie in this slot and bear against the upper face of the slot and the face of the bracket 18. l Vedge 25 has thereon a U lug 26 in which a screw bolt 27 is freely rotatable. This bolt 27 is held against longitudinal movementrelatively to the wedge by means of collars 28, and engages in a tapped orifice 29 in the'yoke 17. Rotation of the screw bolt 27 thus tends to force the wedge 25 inwardly or outwardly in the slot 24.

If for example the stock to be straightened is found to be slightly larger in diameter than that which the machine has been adjusted to care for, adjustments of each idle roll may be made to compensate for this Variation. The angle of crossing between the driven roll 3 and idle roll 14 is increased. This is effected by loosening bolts 23, which secure the yoke 17 to bracket 18, and rotating the yoke in its bracket. While this engagement is loose the roll 14 may also be tilted in its yoke by screwing in the wedged bolt 27.

The result of this arrangement is to cause the stock to take the contour of the idle roll and to increase the contact on idle roll contour, also to prevent the stock from riding on either end of said roll.

Similarly the angular crossing of the last idle roll 15 and driven roll 4 may be regulated by loosening the bolts 23, which hold the yoke of roll 15 to its bracket, and swivelling the yollie to'increase the angle of crossing of the re s.

The roll 15 is also tilted to cause the stock to follow the contour of the roll 4, and to preeeaaeo slot 24 and wedge 25 is disposed to one side i mediate pressure roll, the wedge is on the leaving side of the median line of the roll.

When, therefore, the wedges 25 are fully withdrawn the tilting of the rolls is accommodated to stock of the least diameter upon which the machine is intended to operate, and the crossing angle of the rolls may be accordingly regulated. Increased diameter in a run of stock to be straightened may be accommodated for in the manner described above, the angle of crossing and the degree of tilting being increased in accordance with such increased diameter.

In the modified form of yoke 30, shown in Figures 8 and 9, two wedges 31 and 32 are provided. These wedges are arranged to slide in inclined slots 33 and 34 on opposite sides of the median line of the yoke, similarl to the single wedge 25 shown in the preceding figures of the drawings. Beyond the wedges the yoke is undercut along each side edge to provide the rocking surfaces 35 and 36. As with the previously described yoke, each of the wedges and 32 has thereon a U lug 37, in which a screw bolt 38 is freely rotatable. These bolts are held against longitudinal movement relatively to the wedge by means of collars 39, and engage in tapped orifices 40 in the yoke 30.

Rotation of the screw bolts 38 associated with either the wedges 31 or 32 thus serves to tilt the yoke in either direction. If the yoke is to be tilted to the left in Figure 9, Wedge 31 is further withdrawn and wedge 32 is forced further into its slot. If the wedge is to be tilted to the right in Figure 9, wedge 32 is further withdrawn and wedge 31 is forced further into its slot.

By this double adjustment the machine may be accommodated to operate on bars of decreased diameter as well as being set initially for a smaller diameter and adjusted to operate on bars of greater diameter.

A further advantage secured by a double rat-her than a single wedge adjustment, is that the idler rolls may be adjusted to produce line Contact of the stock with the longer driven roll in cases where the turning of the longer roll has not been wholly accurate. It frequently happens that the roll blank is not centered with mathematical accuracy during turning. In such case the curve, while accurate, may be so imposed on the roll that the 9, proper compensation may be made for any sulclh slight inaccuracy in the turning of a r0 It is not to be understood that the adjustments described above are intended to adapt the machine to a wide range in the diameter of the round stock to be straightened. The adjustment to accommodate for variations within a comparatively limited range does, however, greatly increase the usefulness of the machine.

WhatI claim is:

1. In a cross rolling machine for straightening round stock the combination of a contoured roll, means for driving said roll, an idle roll bracket mounted in opposition to said driven roll and adjustable angularly to vary the angle of crossing of the rolls, an idle rollin the bracket and independent means for tilting the idle roll in its bracket.

2. In'a cross rolling machine for straightening round stock the combination of a contoured roll, means for driving said roll, an idle roll in opposition to the driven roll, a yoke carrying the idle roll, amounting member for the oke, and a wedge arranged to be interposed tween the yoke and its mounting member for tilting the yoke and the idle roll carried thereby.

3. In a cross rolling machine for straightening round stock the combination of a contoured roll, means for driving said roll, a bracket, a yoke angularly ad'ustable on the bracket in a position oppose to the driven roll, an idle roll in the yoke, and a wedge arranged to be interposed between the yoke and the bracket for tilting the yoke and the roll carried thereby.

4. In a cross rolling machine for straightening round stock the combination of a contoured roll, means for driving the roll, -a bracket, a yoke carrying an idle roll to oppose the driven roll mounted on the bracket for angular adjustment relatively thereto, and means for tilting the yoke and the idle roll carried thereby relatively to the bracket.

5. In a cross rolling machine for straightening round stock the combination of a contoured roll, means for driving said roll, an idle roll in opposition to the driven roll, a yoke carrying the idle roll, a mounting memher for the yoke, a wedge arranged to be interposed between the yoke and its mounting member for tilting the yoke and the roll car- ,ried thereby, and an adjusting screw arranged to bear against the wedge and engage in the yoke.

, 6. In a cross rolling machine for straightening round stock the combination of a contoured roll, means for driving said roll, a bracket, a yoke angularly adjustable on the bracket in a position opposed to the driven roll, an idle roll in the yoke, a wedge arranged to be interposed between the yoke and bracket for tilting the yoke and the roll car- ,ried thereby, and an adjusting screw arranged to bear against the wedge and engage in the yoke.

7 In a cross rolling machine for straightening round stock the combination of two pairs of cross rolls each comprising a con toured driven roll and an idle roll mounted in opposition thereto, a bracket for the idle roll of the enterin pair adjustable angular- -ly to vary the ang e of crossing of the rolls,

independent means for tilting the idle roll I of such pair in its bracket in the direction of travel of the stock, a bracket for the idle pairs of cross rolls each comprising a" con-' toured driven roll and an idle roll mounted in opposition thereto, a bracket for the idle roll of the entering pair adjustable angularly to vary the angle of crossingl of the rolls independent means for tilting t e idle roll oi such pair in its bracket in the direction of travel of the stock, a bracket for the idle roll of the leaving pair angularly adjustable in its bracket to vary the angle of crossing of the rolls, inde endent means for tilting the idle roll of suc pair counter to the direction of travel of the stock, an intermediate pressure roll, an angularly adjustable bracket for said pressure roll, and independent means for tilting said pressure roll in its bracket counter to the direction of travel of the stock.

9. For use ina cross rolling machine the combination of a roll yoke having a side edge thereof undercut to permit tilting of the oke and having in the under face thereof a c annel to accommodate a wedge for producing tilting of the tyoke on its'undercut edge, and a wedge slida 10. For use in a cross rolling machine the combination of a roll'yoke having both side.

edges thereof undercut to permit tilting of the roll on either thereof, and having in the under face thereof channels to accommodate wedges for producing tilting of the yoke on either of its undercut edges, and wedges slid-' able in the channels of the yoke.

11. In a cross rolling machine for straightening round stock the combination of two pairs of cross rolls each comprising a. contoured driven roll and an idle roll mounted in opposition thereto, a bracket for each of the idle rolls angularly adjustable to vary the angle of crossing of the rolls, and means independent of the angular adjustment of the brackets for tilting each of the idle rolls in its bracket either in the direction of travel of the stock or in a direction counter thereto.

12. In a cross rolling machine for straightening round stock the combination of two le in the channel of the yoke.

pairs of cross rolls each comprising a contoured driven roll and an idle roll mounted in opposition thereto, a bracket for each of the idle rolls angularly adjustable to vary the angle of crossing of the rolls, means independent of the angular adjustment of the brackets for tilting each of the idle rolls in its bracket either in the direction of travel of the stock or in a direction counter thereto,

an intermediate pressure roll, an angularly adjustable bracket for said pressure roll, and means independent of the angular adjustment of the bracket for tilting the pressure roll either in the direction of travel of the stock or counter thereto.

In Witness whereof, I hereunto set my hand.

enonen A. WISE.

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