US1765047A - Drawing machine - Google Patents

Description

A. c. BELLES 1,765,047

DRAWING MACHINE Filed Sept. 8, 1926 3 Sheets-Sheet l www,

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June 17, 1930. A. c. BELLES DRAWING MACHINE Filed sept. s, 1926 3 Sheets-.Sheet 2 INVENTOR June 17, 1930. A. c. BELLES 1,765,047 DRAWING MACHINE Filed Sept. 8, 1925 3 sheets-Sheet 3 R O T N E V N l Patented June 1 7, 1930 UNITED 'STATES PATENT OFFICE ALBT 0. BELLES, 0F NEW BRIGHTON, PENNSYLVANIA ASBIGNOB T0 'UNION DRAWN STEEL COMPANY, 0l' BEAVER FALLS, PENNSYLVANIA, A CORPORATION 0I' PENN- SYLVANIA DRAWING MACHINE Application nled September 8, 1926. Serial No. 134,178.

v 4 The present invention relates broadly to metal working machines and more particularly to machines of this character suitable for the drawing of metallic rods, bars or other shapes as well understood in the art.

At the present time it is customary in the art to which the present invention relates to provide drawing machines of a number of ifferent types, a large number of commercial machines embodying a draw chain continuousl travelling in the same direction. I have ound that constructions embodying chains are objectionable from a number of standpoints which it is one lof the objects of the present invention to overcome.

With most chain installations a consider- 'able amount of floor space is required and the capacity of such machines limited. The

chains develop slack during use, and even when tight have a slight tendency to buckle or kink when subjected to the drawing load. With carriages as ordinarily utilized this buckling has not infrequently resulted in nonuniform drawing and die wear. The present invention provides a machine occupying a minimum amount of floor space and effective for uniformly drawing articles.

Another object of the present invention is to provide a drawing machine of maximum capacity, effective for drawing 1n opposite directions. While it has hereto o posedto provide reversible chain installations wherein the carriage controls the reversal of the parts, such machines have not been altogether satisfactory due not only to the inherent objections to the use of a chain, but also because of the necessity with a given setting of the apparatus of drawing only articles having substantially the same length. In accordance with the present invention the travel of the carriage is variable throughout the capacity of the machine, thev control thereof being effected by an operator carried by the carriage so as to be able at all times to carefully watch and control its operation. f

A further object of the invention is to provided a self propelled drawing carriage, positively guided, movable in opposite directions, and including an operators platform.

re been prodefine the limits of my invention, as changes in the construction and operation disclosed therein may be made without departing either from the spirit of my invention or the scope of my broader claims.

In the drawings: Figure 1 is a diagrammatic side elevational view of a drawing machine installation embogying the invention;

igure 2 is a side elevational view, on an enlarged scale and partly broken away, of the drawing machine itself;

V Figure 3 is a top plan view of a portion of the drawing machine showing the carriage and its associated parts, the motor being indicated in outline only; v

Fi ure 4 is a transverse lsectional view on the llne-IV-IV of Figure 1 looking in the direction of the arrows;

Figure 5 is a transverse sectional view on the line V-V of Figure 2 looking inthe direction of the arrows; and

Figure 6 is a transverse sectional view on the line VI-VI of Figure 2looking in the direction of the arrows.

In carrying out the present invention there may be rovided a suitable supporting frame of any esired construction, preferably comprising side members 2 tied together adjacent the ends only by transverse braces 3 as shown in Figures 5 and 6. This leaves the space between the side members substantially unobstructed throughout the length of the machine, thereby facilitating the discharge of the drawn articles as will be hereinafter more fully described.

Adjacent the upper edges of the side members the are provided with inwardly projecting an es.4 below which there are received rack ars 5. Mounted upon the upper supporting rails 6.

' Adapted to travel between the side members on the rails 6 is a carriage 7 having bearings 8 adjacent each 9 carr ing the flanged supporting and guiding w eels 10. At its.intermediate portion the carriage is provided with bearings 11 for a shaft 12, this shaft having secured to one end thereof a gear 13 with which meshes the pinion 14 on the armature shaft of a driving motor 15. On its opposite end the shaft 12 carries a gear 16 meshing with a similar gear 17 on anintermediate shaft 18 journaled 1n bearings 19.\ This intermediate shaft carries a gear 20 meshing with a gear 21 onthe pinion shaft 22. The pinion shaft extends transversely of the carriage and through the sides thereof in such manner that its ends underlie the rack bars 5, the ends carrying pinions 23 which continuously mesh with the teeth of the rack bars.

' It will be -apparent to those skilled in the art that the motor 15 is itself mounted directly on the carriage `7 so that the carriage consti- 4 tutes aself propelled unit. Such a construction has been found highly desirable as it makes it unnecessary to provide lany projecting power shafts or driving pulleys which not only require considerable room but also materially increase the hazards incident to operation.y The carriage also supports an operatoris platform 24 preferably suspended at one side of the carriage on suitable brackets 25..- These brackets may each be provided with a guide roller 26 adapted to cooperate with a rail 27 extending lengthwise of one of the side members for giving increased rigidity to the platform during its travel.

Conveniently located relative to the platform is a controller 28 connected to the motor l5 in known manner, and receiving current from power cables 29 through contact l shoes 30. This construction enables an operator to travel continuously with the carriage and control its operations whereby the amount of travel and the direction thereof may be varied at will.

Since a reversible carriage is desired, a direct current reversible mill type motor is preferably used, as this obviates the necessity of any special reversing earing. Each end of the carriage is provi ed with a gripper 31 of suitable construction in substantially the plane of the racks and having the respective pairs of gripping jaws 32 so located as to extendin accurate alinement with the dies 33 in die blocks 34 each end of the machine frame. By reason of this construction the carriage is effective upon movement in one direction for drawing articles through one set of dies, the operator being in complete control throughout of the carriage movement. In the opposite direction the carriage draws articles through the dies in the die block on the o posite end of the machine. The accuracy o alinement beend for the axle shafts one of which is secured tov of travel, or by machinesvin which the carriage has not been so supported and guided as to prevent any'possi ility of deviation :from a predetermined pathl of travel.

The gripper 31 is preferably maintained against lateral motion by suitable guiding portions G. Drawing force is preferably transmitted to the gripper 31 by a yielding connection which absorbs the shocks incidental to starting and sto ping the draw. Suitable studs S passing t rough a cross member M secured to the carriage 7, are fastened to the gripper 31, and yieldingly secure the gripper 31 to the member-M through opposed coil springs C which encircle the studs S. Nuts N at the outer ends of the studs may be used to apply sutlicient compressive force to the opposed springs to hold the nuts N free of the member M, t ere y permitting motion of the gripper 31 in either direction relative to the member M. Thus I ip er and provide for absorbing longitudinal shocks which may arise when starting or terminating the draw.

As clearly illustrated in Figures 1 and 4 of the drawings, the side members are preferably supported on piers 35 located adjacent opposite ends of at least one of the side members to provide an unobstructed discharge opening 36 between the piers and below such side member. Formed adjacent the machine l Itis desirable from a practical standpoint toeven up or equalize the ends of the drawn articles. As the pit provides effective supporting and alining means for the articles, I preferably provide a ram 39 adjacent one end of the machine and in line with the pit, the ram being' operated in any convenient manner as by a Huid pressure cylinder 40.

The ram may be periodically operated to engage the ends of the articles and properly position the same with respect to lengthwise projection. I

Certain advantages of the present machine arise from the provision of a drawing machine having a self propelled carriage, and in line with a die whenheld by the die supparticularly from a carria e of this type supporting an operators plat orm. A

Other advantages of the invention arise from the use of a reversible drawing means, preferably in the form of a self propelled carriage, soguided that deliectionfrom a predetermined accurate path o'f travel is made impossible. By reason of such a construction the capacity of the machine is increased as an idle between is not necessai` and the quality of the articles is improve and absolute uniformity together with uniform die wear is insured..

Further advantages arise from the construction of the machine and manner of supporting the same whereby drawn articles may be easily discharged therefrom and laterally relatively thereto.

Still further advantages of the invention arise from the provision of means for evening up-or equalizing the ends of the drawn articles. v

I claim:

1.` In adrawing machine, a supporting frame having two parallel side members, transverse brace members connecting lthe side members to each other and spaced apart a distance equal to the len th of the longest article to be drawn, a gui e on the upper portion of each of the side members., a rack on exterior of the carriage and below the racks,

each of said gears meshing with the teeth of one of the racks, a `motor on the carrage,

gearing connecting the 4motor and said shaft formoving the carriage, a die support -connected to the side members of the frame in `substantially the plane of the racks, and a gripper on the carriage in line with a. die when mounted in the die support.

2. In a drawing` machine, a supporting frame having two arallel side members, transverse brace mem rs connecting the side members to eachv other and spaced apart a distance equal to the len h of the longest ar.- 1

porting'means. Intestimony w my hand.

' ticle to be drawn, a gui e on the upper portion of each of the side members, piers for supporting one of the `side members, said piers being spaced'apart adistance ual `to the length of the longest article to be rawn, a carriage supported on the guides, a rack on each side member parallel with and below the guides, a transverse shaft on the carriage, gearson the shaft below the racks meshing with the racks, a motor on the carriage, geary ing connecting the shaft and motor, means vfor supporting a die on the frame between the side membersin substantiall the planev hereof I have hereunto set ALBERT C. BELLES.

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