US1976705A

US1976705A - Apparatus for turning concave rolls

Info

Publication number: US1976705A
Application number: US657436A
Authority: US
Inventors: Theodore W Glynn
Original assignee: Blue Ridge Glass Corp
Current assignee: Blue Ridge Glass Corp
Priority date: 1933-02-18
Filing date: 1933-02-18
Publication date: 1934-10-09
Anticipated expiration: 1951-10-09

Description

Patented Get. 9, 193 4 UNITED" STATES APPARATUS FOR TURNING CONCAVE ROLLS Theodore W. Glynn, Kingsport, Tenn, assignor to Blue Ridge Glass Corporation, Kingsport, Tenm, a corporation of New York Application February 18, 1933, Serial No. 657,436

2 Claims.

This invention relates to an apparatus for the turning of concave rolls, with especial reference to the type of roll used considerably in the metal and glass industries where very hot or semi- 5 molten metal is rolled to sheet form. It has been found desirable in certain of such processes to form the sheets slightly thicker at their longitudinal centers in order to allow for the flow of metal after rolling, and for contraction of the sheet as it cools. This formation necessitates rolls designed in such manner that their longitudinal surfaces are concave, the diameter at the center being less that at the ends. Since rolls suitable for such Work must withstand great heat and pressure and still retain their original accuracy, their manufacture has heretofore been a difficult and expensive matter requiring intricate and costly apparatus. It is the purpose of this invention to provide an apparatus for producing these rolls which will be more simple, economical and accurate.

It is a second object to provide apparatus of the kind described by which any degree of concavity may be obtained by a simple adjustment and by which the desired curve may be produced in a single operation.

With these and other objects in mind, to be developed as the description proceeds, reference is made to the accompanying drawing, in which;

Figure 1 is a side elevation of the apparatus, showing a roll ready for turning;

Figure 2 shows a roll after turning, its concavity being somewhat exaggerated; and

Figure 3 is a sectional view taken along line 3-3 of Figure 1, showing in detail the driving and bearing members of the apparatus.

Referring more particularly to the drawing, a lathe is shown generally at 10, having the usual driving pulley 11, bed 12, and tool rest 13 driven by the worm 14. Since the lathe 10 is a standard apparatus and not a part of this invention, it is illustrated only in sufficient detail to make clear its connection with the invention.

The roll 15 to be worked is supported at one end in a specially designed chuck 16, best shown in Figure 3 and to be described in detail hereinafter. At the opposite end the roll 15 is carried in a bearing member 17 having a vertical adjustment shown diagrammatically at 18. It will be noted that roll 15 is positioned so that its axis is not parallel to the bed 12 which determines the path of the tool. By manipulation of adjustment 18' the end of roll 15 may be raised or lowered to effect any desired angle, within practicable limits, between the axis of the roll,

shown at 19, and the horizontal plane in which the cutting edge of the tool travels, shown at 20, Figure 1. Thus the tool travels in a' plane angularly displaced from the axis of the roll, and as will readily be seen this displacement causes the tool to cut to different depths as it moves along the roll, the variation causing a proportional variation in the concavity to be produced. To obtain uniformity at the longitudinal ends of the roll, it is so adjusted that the line of movement of the tool crosses the axis of the roll at the exact longitudinal center of the roll, such center being shown at 21. Thus at 21 the tool will present its cutting edge directly horizontal to the axis of the roll, while as it is carried along a path parallel to the bed 12 of the lathe the cutting edge will be progressively above or below the axis of the roll as it proceeds from the center 21 to the position indicated at 22, Figure 1, corresponding to position 23 at the opposite end of the roll. The resulting roll is shaped as is shown at 24 in Figure 2, the curvature being exaggerated as stated.

In order that the process described may be carried out on any lathe, there is provided the attachment shown in Figure 3. The roll 15 being adjusted so that its axis is out of alignment with the center line of the spindle of the lathe, it is obvious that the ordinary bearing means would be impracticable. there is provided a self-aligning ball bearing of the adapter sleeve type, having a tapered sleeve 25 clamped in place over the small end 26 of the roll 15. This clamping action is secured by a threaded ring or nut 2'7 which also forces into place on the sleeve 25 the inner race 28 of the ball bearing. The chuck 16 is provided with adjustable jaws 29 by means of which the outer race 30 of the bearing is centered. In order to drive the roll a dog 31 is clamped about it so that one end of the dog will contact one of the jaws 29. It will be seen that the play of the roll, due to its axial displacement, will be taken up within the ball bearing.

I claim:

1. Apparatus for turning a concave roll which comprises a lathe having a bed, a tool carrier adapted to travel a path parallel to the axis of the bed, a chuck, means for centering one end of the roll and for driving the same, such means comprising a universal bearing associated with the chuck, a dog providing a driving connection between the chuck and the roll, and adjustable bearing means for the other end of the roll To meet this difficulty a chuck, and means associated with the chuck for centering the other end of the roll and for driving the same, such means comprising a universal ball bearing adapted to .be centered in the chuck and secured thereto and to the roll, and a dog providing a driving connection between the chuck and the roll, 7

V THEOPORE W "GLYNN.