US1206928A - Process for manufacturing brake-beam fulcrums having integral third-point support. - Google Patents

Description

F. l. SCHROEDER.

PROCESS FOR MANUFACTURING BRAKE BEAM FULCRUMS HAVING INTEGRAL THIRD POINT SUPPORT.

APPLICATION FILED NOV. 15. 1915.

1,206,928. Patented Dec. 5,1916.

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F. J. SCHROEDER.

PROCESS FOR MANUFACTURING BRAKE BEAM FULCRUMS HAVING INTEGRAL THIRD POINT SUPPORT.

APPLICATION FILED NOV. 15, I935.

Patented Dec. 5,1916.

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UNED STATES PATEN T OFFICE.

FREDERICK J'. SGHROEDER. OF CLEVELAND, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE DAMASCUS BRAKE BEAM (30., OF CLEVELAND, OHIO. A CORPORATION OF OHIO, (INCORPORATED FEBRUARY 25, 1916.)

PROCESS FOR MANUFACTURING BRAKE-BEAM FULCRUMS HAVING INTEGRAL THIRD- POINT SUPPORT.

Specification of Letters Patent.

Patented Dec. 5, 1916.

Application filed November 15, 1915. Serial No. 61,662.

To all whom it may concern Be it known that I, FREDERICK J. Sermon DER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and'State of Ohio, have invented certain new and useful Improvements in Processes for Manufacturing Brake-Beam Fulcrums Having Integral Third-Point Support, of which the following is a specification.

The present invention relates to the process for manufacturing brake beam fulcrums, and particularly to such fulcrums that are provided with an integral third point support and described in my copending application Serial No. 61,661, filed November 15,1915.

The main features of the present invention reside in that after bending and twisting the ends of a pair of flat bars, the ends are welded together to form a solid tension-member seat as well as the bearing or third point support thereon in a single Beyond the boring of the usual holes no other machine work is necesary after the fulcrum has been taken out of the dies.

One embodiment of the present invention has been illustrated in the accompanying drawings in which Figure 1 represents the two blanks after the first step in the process, namely, the bending and twisting of the ends; Fig. 2 shows an elevation of the two blanks placed together in position to put into the dies; Fig. 3 is an end view seen from the right of Fig. 2; Fig. 1 is an elevation of a fulcrum after the second step in the process, namely, that of partly forming the tension member seat and the third. point support; Fig. 5 is an end view seen from the right of Fig. 4; Fig. 6 is an elevation of a finished fulcrum after the third step in the process; Fig. 7 is an end view seen from the right of Fig. 6; Fig. 8 is a transverse section of the dies used for the bending and twisting of the blanks; Fig. 9 is a transverse seetion on the line 99 of Fig. 10 showing the holding dies provided with a forming chamber for the tension member seat and the third point support; Fig. 10 is a longitudinal section along line 10-10 of Fig. 9; Fig. 11 shows the blanks in position in the holding die with the plungcr ready to enter its chamber; Fig. 12, a

similar view to Fig. 11 at the end of the second step in the process with the tension member seat and the third point support partly formed as illustrated in Fig. 41:; Fig. 18 is an elevation of the plunger for the third or finishing step in the process and Fig. 14 shows the position of the finishing plunger in the holding die at the end of the third step of the process.

The first step in the process consists in first heating and then placing a blank, which here is shown as a flat bar 10 for the upper arm of the fulcrum, see Fig. 1, in the lower half 17 of the die shown in Fig. 8, whereupon the upper part 16 of the die is pressed down until the main portion 10 and the end portion 11 are bent and twisted to the shape shown in Fig. 1; the main portion being held in aperture 18 and the end portion in aperture 19 of the die. The bar may be, if desired simultaneously cut to the required length; similarly the lower half ,of the fulcrum is treated in the same or a similar die until the main portion 12 and the end portion 13 take a relative position shown in Fig. 1. It will be observed that the end 11 of the upper half of the fulcrum is left longer than the end 13 of the lower half. so that enough metal will be left to form the third point support. The two bars 10 and 12 are now placed together as shown in Fig. 2 and suitably clamped and reheated, whereupon they are laid in the lower half 21 of the holding die, andthe upper half 20 of the same die is clamped down over them. The upper and lower fulcrum portions 10 and 12 then 0ccupy the apertures 22, provided in the die and are held rigidly therein, while the ends 11 and 13 project into the forming chamber 23, 2 1 provided therein. The upper part 24 of this chamber has a rounding or seat 25 toward the back portion for the support and the lower half 23 of the chamber has a similar forwardly rounded shoulder 26 to shape the portion of the fulcrum beneath the tension member seat 14:. The plunger 27 with the projecting rounded nose 28 and retreating recesses 29 fits snugly into the chamber. The nose 28 is to form a tension member seat 14. in the fulcrum, and the recesses to form the lugs or cars 15 of the third point bearing. The central fin 30 serves to press back the metal between the two lugs 'as shown by the inclined dotted line 35 in Fig. 4.

After having made a full stroke, the plunger 27 has the position shown in Fig. 12 when the tension member seat 1& and the lugs 15 have been partly formed as illustrated in Figs. l and 5. The third and last step in the process now consists in replacing the plunger 27 by a similar plunger 31, the operating end of which has the contours of the finished fulcrum, that is, the nose 32 taking the place of the nose 28 and the re- 7 cesses 33 taking the place of the recesses 29 and the fin 34 taking the place of the fin 30 in plunger 27. After having completed its stroke as shown in Fig. 14: the tension member seat 1 1, see Figs. 6 and 7, will then have been completely formed and the lugs 15 rounded back and front, and the metal between them pushed backto the uprightposition indicated by line 36 in Fig. 6, and the fulcrum is now finished. In case the tension member is of any other shape than cylindrical, the noses 28, 32 of the plungers 27 31 will, of course, have a suitable shape to form a close fitting seat 14 in the fulcrum.

It will be noted that the two ends 11 and 13 are perfectly welded together so that not only the tension member seat 14 constitutes a solid part with the two main portions 10 and 12 of the fulcrum, but that also the lugs 15 forming the third point support are integral with the tension member seat, as well as with the fulcrum itself. The advantage of this must be evident as for the same amount of material used a much stronger construction will be obtained. The advantages of the process from an economical view point will also be readily seen as only one heating is necessary and no shifting of the parts, except the exchanging of the two plungers 27 and 31 will be necessary to form the tension member seat and the integral third point support on the fulcrum.

I I claim 1. Process of manufacturing brake beam fulcrums consisting in first bending and twisting the blanks and cutting them to proper length, thereupon partly upsetting,

welding, and deflecting the ends of the blanks in the direction of the center of mass of the completed fulcrum end, and lastly completely upsetting the ends to form a solid.

seat and projecting lugs out of said'ends on the fulcrum. o

2. Process of manufacturing brake beam fulcrums consisting in first bending, twisting and cutting the blanks to proper length, thereupon partly upsetting, welding, and de fleeting the ends of the blanks in the direction of the center of mass of the completed fulcrum end, and lastly completely upsetting and welding the ends to form a solid seat and projecting lugs out of said ends on the fulcrum, the second and third steps being performed while the fulcrum is held in dies, the contour of which corresponds to the completed fulcrum.

3. Process of forming a third point bearing and a seat on the end of a slotted brake fulcrum; which consists in providing a fulcrum blank of suitable length and angularity, clamping the slotted portion of said blank in dies having a chamber for the end of the blank to be operated upon, upsetting and deflecting in the directionof the third point support said end of the blank while at welding heat in said chamber and simultaneously forming the end into a seat and a third point support integral with said slotted portion.

4. Process of forming a third point hearing and a seat on the end of a slotted brake fulcrum; which consists in providing a fulcrum blank of suitable length and angularity, clamping the slotted portion of said blank in dies having a chamber for the end of the blank to be operated upon, subjecting said end of the blank while at welding heat to action of a deflecting plunger in order to deflect said end toward the center of mass of the completed fulcrum end, and finally subjecting the same end to the action of a second upsetting and forming die in said chamber in order to finish the seat and the third point support.

The foregoing specification signed at Cleveland, Ohio.

FREDERICK J. SCI-IROEDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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