US2279349A

US2279349A - Method and apparatus for drawing metal

Info

Publication number: US2279349A
Application number: US331692A
Authority: US
Inventors: Simons Aaron
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-04-26
Filing date: 1940-04-26
Publication date: 1942-04-14
Anticipated expiration: 1959-04-14

Description

-April 14, 1942. A. SIMONS 2,279,349

METHOD AND APPARATUS FOR DRAWING METAL 4 Filed A ril 26, 1940 ATTORNEY Patented Apr. 14, 1942 UNITED STATES PATENT OFFICE 2,279,349 METHOD AND APPARATUS FOR DRAWING METAL Aaron Simons, Bronx', N. Y. Application April 26, 1940, Serial No. 331,692

15 Claims.

This invention relates to machines for drawing metal strips, sheets and the like between rotatable die members or rolls of extremely small diameter adjustable toward and from each bers or rolls are restrained against bending in any direction, and are retained in fixed position while rotating on their axes, and 'wherein longi- .tudinal friction hearings or backings are provided for the die members or rolls which bearings reciprocate back and forth in opposed dimotions to eachother while said die members or rolls are rotated, thereby controlling fric-.'

- tional relationship in an apparatus of the class described; a further object being to provide reciprocating longitudinal friction bearings or backings for rotatable rolls which support the parent that the combined rotary movement of the rolls and reciprocating movement of the backings will materially reduce the frictional surface resistance between the rolls and their backings, and permit the rolls to be rotated at all times in their respective hearings or backmgs.

In Fig. l of the drawing is shown a diagrammatic partial sectional view through a machine substantially of the type and kind disclosed in my application hereinbefore referred to; such parts only of the machine being shown as .are necessary to illustrate the operation and structural arrangement of the die members or rolls and their longitudinal friction hearings or backings. At I0 is shown part of the base or frame of the machine in which is supported a shaft ll driven from a suitable motor. On this shaft rolls throughout the full working length of the rolls; and with these and other'objects in view the invention consists in the method of producing strips or sheets and in an apparatus as more fully hereinafter described and claimed.

The invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which:

Fig. through a part of an apparatus or rolling mill made according to my invention.

Fig. 2 is a partial section on the line 2--2 of Fig. 1 and Fig. 3 is a partial section Fig. 1.

.M present invention relates to a machine of the general type and kind more fully disclosed in, for example, myprior application, Ser. No.

onthe line 3-3 of 269,373, filed April 22, 1939, of which this application. constitutes a continuation in part.

It is the purpose of my invention to provide an apparatus for drawing strip or sheet material and a method of producing such material by utilizing non-reciprocating rolls which are arranged in reciprocating friction bearings are backings, with independent means for rotating said rolls, thereby facilitating the production of drawn products having smooth-finish, or in other words, unmarr'ed surfaces. This result is made possible by the use of combined rotatable rolls and reciprocating bearings or backings.- Furthermore, it (be apparent that by utilizing different drives for the rolls, the rolls may be rotated at "surface speeds materially different from-the speed of travel o'ffthe outgoing reduced product, thereby facilitating the'fof the workpiece between the rolls. It will-also be ap- 1 is a diagrammatic sectional view is arranged a small gear [2 operatively engaging large gears I3, only one of which is indicated. The gears l3 are disposed in a housing H adjacent to and form .part of the frame structure of the machine. The, gears l3 are utilized to drive the drums supporting the workpiece and for drawing the workpiece in either of two directions through the machine as taught in said prior application. A schematic showing of the drums referred to is indicated at I3a, 13b, in Fig. .2 of the drawing, and the shaft of one.-

of these drums is'indicated at I30. The workpiece or strip is indicated at l3d.

Arranged upon the frame is a suitable casing I5 in which is supported a shaft l6 driven from the shaft ll through achain and sprocket con- In the housing I5 is also struction as at I I. supporteda short shaft l8 driven from the shaft it through gears l9 and 20 on the shafts l6 and i8 respectively; Arranged upon the shaft I8 within the housing I5 is an oblique cylinder 2| which is adapted to impart reciprocating movement to bearings or

backings

22, 23 of die members or rolls 24, 25. The cylinder 2| has extending

arms

26, 21 operating in drive rods 28,v 29 respectively. The rods '28, 29 extend through at least one end of the casing l5 and th rod 28 operates in a bearing plate 30- which also forms a bearing for the shaft l6 and the roll '25.

At 3| is shown a die block arranged upon the frame [0 of the machine, and the shaft 16 extends into and through this block and is arranged in suitable bearings 32 therein. On the shaft. I6 is a gear 33 which meshes with a gear 34 arranged upon. the die member or roll 25, whereby the sar'ne'is rotated; The other or up-' per roll 24 placed in operative engagement I with the shaft l6 through agear 35, an inter-- mediate gear "35, and a gear '31. The gear 36 is -mounted-upon pivotally coupled links, as in-'. 'dicated in Fig. 2, so as to compensate for the slight vertical adjustment of the roll 24"with respect to the roll 25 in gaging the spacing of said rolls one from the other in controlling the reduction in thickness of the workpiece to be drawn between said rolls.

At 38 is shown a vertically adjustable block with which is coupled the friction bearing or backing 22 and roll 24. The block 38 is adjusted vertically through the medium of a hand wheel 39, on the shaft 40 of which-are worms operating in connection with worm gears 4|. The latter are arranged on screw rods 42 which are coupled with the block 38. The specific structure of this vertically adjustable block and the manner of its mounting is also disclosed in detail in the prior application and forms no direct part of the present invention aside from indicating a means of adjusting the parts.

Upon the block 3| is arranged a main support or backing 43 which may be of any desired construction and particularly of such material as to form a proper bearing and mounting for the reciprocating bearings or

backings

22, 23. The latter seat in recesses formed in the support 43 as well as a corresponding support 43a supported on the block 38.

The protruding ends of the

backings

22, 23 are channeled to receive fork-

shaped pins

44 and 45 respectively. These pins are supported upon and movable with the rods 28 and 29. While the relationship between the pin 45 and backing 23 is relatively fixed, it will appear that the forked pin 44 is provided to compensate for vertical adjustment of the upper backing 22. It will of course be understood that the end portion 29a of the rod 29 is of O-frame construction so as to envelope the gears as well as the bearing plate 30, note for example, Fig. 3, and provide for the reciprocating movement which is imparted to the' backing 23.

Movable with the block 38 is a bracket 38a forming a bearing and support for the outer end of the roll 24. In the present construction, it will be understood that the die members or rolls 24 and 25 are maintained in a fixed position longitudinally with respect to each other, or in other words are not reciprocated. However, these rolls are rotated through the gears employed, and by changing the ratio of gearing, these rolls may be driven at different speeds. In some instances, the surface speed of the rolls may be less than the speed of the outcoming drawn product. However, in operating upon some types and kinds of workpieces, the speed of rotation of the rolls may be equal to or even greater than the movement of the outcoming product.

In the operation of themachine, it will be understood that the block 38 will be adjusted to provide the desired or predetermined spacing between the

rolls

24, 25. As the strip is drawn between the rolls from one of the drums actuated through one of the gears l3, the

backings

22, 23 are reciprocated back and forth in opposite directions to each other and longitudinally of the axes of the rolls while said rolls are being rotated in the manner heretofore described. This sliding reciprocating movement of the backings sistance between the rolls and their respective backings to prevent binding action and to permit the rolls tofrotate at the desired speed to 'will sufficiently reduce the frictional surface required, after the workpiece has been drawn through the machine in one direction, suitable means may be provided to throw the opposed drum into operative position so as to again draw the workpiece through the machine in a direction opposite to the first mentioned direction. It

will beunderstood that suitable adjustment of the block 38 has been made to provide the closer spacing of the

rolls

24, 25 to produce thefurther reduction in thickness of the workpiece constituting the pre-drawn product. I

It will of course be apparent that in machines of the type and kind under consideration, many devices and mechanisms are employed to control and regulate the several parts, and in lubricating the parts including the workpiece, but as such' to maintain a constant hearing or backing there- In the same sense, the fixed or stationary supports are also extended to fully and amply for.

cover this working length of the rolls. In different capacity machines, the structures will be made to suit the workpieces to be handled in the machine, and in this respect, the present illustration is representative of only one type and kind of machine, and even here the illustration is to be regarded as more diagrammatic than otherwise.

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

1. An apparatus for drawing elongated workpieces to reduce the thickness thereof, comprising two relatively adjustable die members between which a workpiece is drawn, means independent of the workpiece for rotating said diemembers while maintaining fixed relationship to each other, a backing for each die member, and means for reciprocating said backings in opposite directions to each other and longitudinally of the die'members while said die member are rotated. 1 2. An apparatus for drawing elongated workpieces to reduce the thickness thereof, comprising two relatively adjustable die members between which a workpiece is. drawn, means independent of the workpiece for rotating said die members while maintaining fixed relationship to each other, a backing for each die member, means for reciprocating said backings in opposite directions to each other and longitudinally of the die members while said die members are rotated, and means to adjust one of said die members including the backing therefor toward and from the other die member and backing to control and .regulate spacing between said die members.

tween which a workpiece is drawn, means independent of the workpiece for rotating said die members while maintaining fixed relationship to each other, a backing for each die member,

governing the reduction formed in the thickness.

of a predetermined workpiece drawn between said rolls, means for drawing a workpiece between the rolls, means imdependent of the workpiece for rotating the rolls, longitudinal friction bear-' ings for said rolls, means for reciprocating the bearings in opposite directions to each other longitudinally of the axes of said rolls and maintaining the hearings in engagement with the working length of the rolls, and means arranged longitudinally of the working length of the rolls forming supports for said bearings in which said bearings are slidably mounted.

5. An apparatus fordrawing elongated workpieces to reduce the thickness thereof, comprising two elongated rolls arranged in parallel relationship, means adjusting the rolls with respect to each other to control spacing therebetween in governing the reduction formed in the thickness of a predetermined workpiece drawn be-. tween said rolls, means for drawing a workpiece the workpiece for rotating said rolls, and means for reciprocating said bearings parallel to the axis of said rolls to reduce friction between the bearings and rolls.

' 9. The method of controlling frictional relationships in a pull-mill, which includes the steps of supporting the working rolls throughout their operative length, pulling a workpiece between said rolls, rotating said rolls independently of said workpiece, and moving the working roll supports parallel to the axis of said rolls while said rolls are rotated.

10. The method of operating a strip mill which includes the steps of supporting the working rolls throughout their operative length, maintaining the rolls in predetermined fixed relationship with respect to each other, reciprocating the working roll supports parallel to the axis of said rolls, pulling astrip through said working rolls, and rotating the rolls in the supports independently of said strip.

I 11. The method of controlling frictional relationship in drawing elongated workpieces, which includes the steps of supporting each roll of a pair of working rolls throughout its operative length in a backing reciprocated parallel to the between the rolls, means independent of the workpiecefor rotating the rolls, longitudinal friction bearings for said rolls, means for reciprocating the hearings in opposite directions to each other longitudinally of the axes of said rolls and maintaining the bearings in engagement with the working length of the rolls, means arranged longitudinally of the working length of the rolls forming supports for said hearings in which said bearings are slidably mounted, and a single driven element for simultaneously imparting reciprocating movement to said bearings.

6. In a rolling mill for reducing the thickness of an elongated workpiece, a pair of working which a workpiecepasses, a pair of backings.

for said rolls, means for reciprocating said back- I ings in opposite directions to each other and parallel to the axes of said rolls while maintaining the rollsagainst longitudinal axial movement with respect to each other, means independent of the workpiece for rotating said rolls upon their axes and while said bearings are reciprocated longitudinally of the rolls, means for adjusting the spacing of the rolls to control the reduction in a predetermined workpiece'to be passed through the machine, and means for drawing a workpiece between said adjusted and rotatedrolls.

8. In a rolling mill, a pair of worlnng rolls between which aworkpiece passes, supporting. bearings for said working rolls, means independent of axis of the rolls while rotating the rolls within said bearings independently of the passage of a workpiece between said rolls. 7

v 12. The method of reducing the thickness of an elongated workpiece which includcsthe steps of supporting a pair of dies in predetermined spaced parallel relationship to each other throughout their operative length, moving die supportsand backings parallel to the axis of the dies in opposite directions to each other while rotating the dies within said supports in controlling frictional relationship while pulling a work-.

piece between said dies independently of the rotation of said dies.

' 1 3. The method of reducing the thickness of an elongated workpiece, comprising mechanically drawing a workpiece between a pair of die members, supporting the die members throughout their operative length, and decreasing the frictional surface resistance between said supports and said die members by reciprocating the supports for the die members parallel to the axes thereof while rotating the die members on their axes, thereby facilitating the drawingof the workpiece between said rotated die members.

14. The method of reducing the thickness of an elongated workpiece, comprising mechanically drawing a workpiece between a pair of die members, supporting the die members throughout their operative length, and decreasing the frictional surface resistance between said supports andsaid die members by reciprocating the supports for the die members parallel to the axes thereof while rotating the die members on their axes independently of the drawn workpiece, thereby facilitating the rotation of said die members in their respective supports.

15. The method of reducing the thickness of an elongated workpiece, comprising mechanically drawing a workpiece between a pair of elements rotated independently of the drawn workpiece and maintained in predetermined spaced and longitudinal relationship with respect to each other, while reciprocating backings for said elements parallel to the axes thereof and in opposite directions to each other, and reciprocating said backings in stationary bearings extending throughout the operative length of said elements.

. AARON SIMONS.