US1656930A - Method for forging brake-beam fulcrums - Google Patents

Description

Jan. 24, 1928. 1,656,930

L. L. WHITNEY METHOD FOR FORGING BRAKE BEAM FULCRUMS Filed Jan. 9, 1924 2 Sheets-Sheet 1 Jan. 24, 1928. 1,656,930

L. 1.. WHITNEY METHOD FOR FORGING BRAKE BEAM FULCRUMS Filed Jan. 9, 1924 2 Sheets-Sheet 2 hoe/W W656.- [ore/2.5 my.

Patented .lan. 24, 1928.

UNITED STATES PATENT OFFICEQ LOREN L. WHITNEY, F HAMMOND, INDIANA, nssrenon r0 AMERICAN .sTEEL FOUNDRIES, or CHICAGO, ILLINOIS, A CORPORATION or NEWJERSEY.

METHOD FOR rename BRAKE-BEAM rnLcRUMS.

Application filed January 9, 1924. Serial No. 685,027.

.- lorgmg l'ulcrums whereby a stronger and better finished fulcrum may be made at a reduced cost. Another ob ect 1s to provide a method of forging fulcrums adapted to meet the varifill i one requirements for the commercial productions of fulcrums.

These and other objects are accomplished by means of the method disclosed on the accompanying sheets of drawings, in whicl Figure l is a fragmentary side elevation of ablank from which. the fulcrum is to be forged Figure 2 is an end view thereof;

li igures 3, 4c and 5 are top, side and end views respectively, of one end cit the blank after the latter has been upset to accumulate enough stockat that end to form jaws;

Figures 7 and 8 are top, side and end views respectively, of the same blank after that .end has been hot-sawed, split, punched. or spread preparatory to forming jaws;

Figures 9, 10 and. 11 are top, side and end views respectively, of the same end of the blank after the blank has been subjected to pressure for giving final shape and finish to said jaws;

Figure 12 is a side elevation of the opposite end of the blank;

Figure 1.3 is an end view thereof;

Figures 14-, 15 and 16 are top, side and end views respectively, of the second end of the blank after it has been upset;

Figures 17, 18 and 19 are top, side and end views respectively, of the second end. of the blank after the metal at that end has been upset an additional amount and spread. preparatory to forming attaching ears;

Figures 20, 21 and 22 are top, side and end views respectively, of the second end of the blank after said blank has been hotsawed, split, punched or spread prepara tory to forming jaws;

Figures 23, 24. and 25 are top, side and end views respectively, of the second end of the blank after the jaws and attaching ears have been completed;

Figures 26 and 27 are top and side views, respectively, of the completed fulcrum;

Figure 28 is a top plan view of a flat bar beam to which t'ulcrums, formed bythe methodabove indicated, are secured;

Figure 29 is a sectional view of stationary and movable dies by means of which one end of the fulcrum is formed; and

Figure 250 is a similar sectional view of stationary and movable dies by means of which the other end of the fulcrum is formed.

The various novel features of the invention will be apparent from the following description and drawings, and will be particularly pointed out in the appended claims Referring to the figures Ofthe drawings, it will be noted that a blank 30, in this instance of round stock, is provided having two end portions 31. and 32. The end. 31 is first heated and then placed in a die and up set to build up sufficient stock 33 preparatoryto :lorming jaws. A stationarydjie portion, as shown at 34 in the die block 3501? Figure 29, is used. for such upsetting and also a movable die 36. The upset portion of the first end. 31 of the blank is then hotsawed, split, punched or spread to provide a longitudinally extending opening 37, as shown in Figures 6, 7 and 8, to form jaw portions 38. The same end of the blank is then placed in a stationary portion .39 ofthe die block 35 and subjectedto further pressure by the movable die it) to form the com pleted jawslil, as shown in Figures 9,10 and 11..

The other or second end 32 of the blank is then heated and upset to build up stock at 4:2, asshown in liigures 141, 15 and 16. In this instance the second end of the blank is placed in the stationary die. portion 43 in a die block 44 and subjected to pressure by a movable die member 45. The second end of thevblank is then placed in the stationary die portion 46 in. the die block 44 and. subjected to further pressure by a movable die member 47 for the purpose of upsetting that end of the blank an additional amount and spreading the metal thereof laterally to build up suflicient stock to form not only jaws, but attaching ears, shown at 48 in Figures 17, 1.8 and 19. The upset portion of the second end is then hot-sawed, split, punched or spread to provide a longitudinally extending opening 49, as shown in Figures 20, 21 and 22 to form jaw portions 50. The second end of the blank is then IOU placed in the stationary die portion 51 and subjected to further pressure by the movable die 52 to further spread the metal laterally at that end and complete the jaws 50 with their attaching ears 53, as shown particularly'in Figures 23, 24 and 25. Registering openings 5st are then formed in the jaws 4:1 for reception of the pivot pin, and pairs of registering openings 55 and 56 formed in the attaching ears 53 of jaws 50 for the receptionofrivets by means of which the ears may beseeured to a beam. The completed fulcrum is shown in Figures 26 and 27, and fulcrums thus formed are shown applied to a flat bar beam 57 in Figure 28.

As mentioned above, the openings 5-1- are for the reception of a pin by means of which brake levers 58 may be connected to the fulcrums. Pins or rivets 59 extend through the pairs of registering openings 55 and in the cars 53 and also pass through the beam 57 for attaching the fulcrum in each instance to the flat beam in a manner to prevent relative pivotal movement between the fulcrum and the beam. As shown in Figure 28, the fiat bar beam 56 has lever hangers 60 secured to the ends thereof.

It will be appreciated, of course, that the angular relationship between the jaws at opposite ends of the fulcrum may be made to meet the particular requirements.

By means of the simple, efficient and iin proved method he-reinabove described, a brakebeam fulcrum may be forged which is stronger and has a better finish and is produced at a cost lower than fulcrums heretofore made.

It is my intention to cover all modifications 1 of the invention falling within the spirit and scope of the following claims.

I claim:

1. A method of forging a fulcrum consisting in, providing a blank, heating same, upsetting one end thereof to accumulate sufficient metal to form jaws, forming a longitudinal opening in said upset end to provide spaced jaw portions, treating said jaw portions to finish said jaws, then upsetting the other end of the blank to accumulate metal, then subjecting said second end to pressure to further upsetand then spread the metal. at

said end preparatory to forming attaching ears, then forming a longitudinal opening in said second upset end to provide spaced jaws, and then subjecting said end to further treatment to form completed jaws and attaching ears.

2. A method of forging a fulcrum consisting in providing a blank, upsetting the ends thereof to accumulate sutlicient metal to form jaws, upsetting one of said ends to accumulate more metal and spreading same preparatory to forming attaching ears, treating the ends of said blank to form longitudinal openings for providing portions of pairs of ja\\'s,.and treating said jaw portions for linishing said jaws and attaching ears.

3. A method of forging a brake beam fulcrum, consisting in providing a blank, heating the ends thereof, upsetting said ends to accumulate sullicient metal to form jaws, treating one of said ends for spreading the metal preparalory to forming attaching ears, treating said upset ends to form longitudinal openings at an angle with respect to each other to provide pairs of spaced jaws, and the-n subjecting said jaw portions to further treatment for finishing said pairs of jaws and forming attaching ears in one pair of jaws.

l. A method of forging a brake beam l'ulcrum consisting in providing a blank, heating same, subject-ing one end to pressure for upsetting same to accumulate metal to form jaws, subjecting said end to further pressure for spreading the metal preparatory to forming attaching ears, then forming a longitudinal opening in said end to provide spaced jaw portions, and then treating said aw portions to finish said jaws and lorm attaching ears.

5. The method of manufacturing fulerums which consists in heating a blank and formink it with upset portions at either end, then successively slittingand spacing said upset portions to form ears, and shaping and punching said ears to form supporting means.

Signed at Hammond, lndiana, this 7th day of December, 1923.

LOREN L. WHITNEY.

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