US1666344A - Tieplate punching and shearing press - Google Patents

Description

April 17, 1928; 1,666,344

M.- OVESTRUD TIE PLATE PUNCHING AND SHEARING PRESS Filed April 29, 1925 3 Sheets-Shea. 1

M. OVESTRUD TIE PLATE PUNCHING AND SHEARING PRESS filed April 1925 5 Sheets-Sheet 2 April 17, 1928. 6 1,666,344

M. OVESTRUD TIE PUNCHING AND SHEARING PRESS Filed April 29. 1925 3 Sheets-Shea. 3

a! J ii- 7 Q 21 :1" 12,116

4 31454 ill/627707 fife/f amsimd s 15. 1916, to E.

Patented Apr. 17, 1928.

UNITED P AjTiEiNT OF F MELVIN OVESTBU-D, or STILLW-ATER, MINNESOTA, assreivonor ONE-HALF 'ro TWIN CITY FORGE & FOUNDRY COMPANY, or STILLWATER, MINNESOTA, A conrons- TION OF MINNESOTA TI'EIPLATEP'UNCHING AND SHEARING rnnss.

Application filed-April 29, 1925. Serial No. 26,874.

My invention relates to improvements in presses employed in making tie-plates of the character set out in Letters Patent of the United States, No. 1,171,581, granted Feb. H. Barrett, the said improve ments embodying means for punching steel blanks and shearing punched tie-plate sections therefrom.

An object of the invention is to provide a durable press of the instant nature, whereby the punching and shearing operations, may be performed rapidly and accurately, to the end that quantity production may be attained at minimum cost.

More specifically it is an object of my invention to supply a press adapted to perform the initialoperation upon a. blank comprising a long body plate formed with a flange longitudinally thereof, said operation including the transverse severance of said blank into tie-plate sections and the punching of apertures in the body plate to provide spike holes in said tie-plate section-s.

Another object of the invention is to provide a press of the present character, wherein dual punching and shearing operations are performed upon one thrust of the press ram, one operation following the other, whereby the strain upon the press structure is reduced to a minimum.

A further object of the invention is to provide, in a press of this nature, means for side registering the blank, whereby the apertures punched in the body plate will be accurately located with respect to the flange on said body plate. Y

An additional object is to 'fit a press of this kind with means for holding a blank preparatory to the punching of the apertures therein, said means serving tostrip the blank from the punches following the punching operation.

lVit-h the. foregoing and other objects in view, which will appear in the following description, the invention resides in the novel combination and arrangement of parts and in the details of construction hereinafter described and claimed. 1

In the drawings, Fig. 1 is a front elevational view of a press embodying my invention, the base of the frame being broken away; Fig. 2 is a detail'sectional view taken on the line 2 2 Fig. 1;.Fig; 3 is a detail sectional View taken on the line 33 of Fig. 2; Fig. 4 is a detail sectional view taken through the punch block asv on the line 4.4 of Fig. 2'; Fig. 5 is,- a front elevations-1 view in detail of the blade assembly; Fig. 6 is a sectional view taken on the line 6-6 of Fig. 5; Fig. 7 is a "ertica'l sectional view in detail illustrating the punch head and complementary parts in the bed of the press, said view being taken as on the line 77 shown in Fig. 3; Fig. 8 is a perspective view of a tieplatesection perforated and struck from a blank as by the instant press and Fig. 9 is a perspective view of a blank from which such tie-plate sections are formed.

-Referring to the drawing, and particularly to Fig. 8 thereof, it will be noted that the tie-plate section A, formed my improved press, includesa biOd) plate portion or platform 1.0 and-a flange port-ion llperpend icular to said platform. Inan operation performed by mechanism other than that shownherei-n, said flange portion 11 is bent into theposition shown in dottedlines to form a jaw member a for engagement with the upper'surface of the base of a rail restingon the platform 10 Apertures 12 punched in the platform lQby-the instant press receive spikes which are driven into'a tie, the two spikes in the two apertures re-. mote from the jaw member a being adapted to catch over the uppersurface of the rail base opposites-aid jaw member. Said two spikes, owing to the relation of their respeca bed 14 supported bysaid base, a power crank-sl'ia-ft 15 journaled inthe upper ends of said frame members 13,21 ram 16 slidably guided between said frame members and a pitman 17 connecting said ram with said member-s13 rising from a fbase (nqt'shown),

'provide a tool attaching plate 16 cranksshaft, all of said parts being common to the conventional heavy duty type of presses.

The bed ll is supplemented with an additional bed'nie1nber14;*, which is spaced to the rear of the bed proper, theadjacent upper corners of said bed. 14-. and bed member 15% being fitted with hardened 15, 15 for co-opcration with shearing blades soon to be described. In the upper face of said bedis a depression 16 in which a mounting block 17 is received for sliding adjustment laterally of the press. Screws 18, threaded in the bed 1-1 and abutting at their ends against the outer edge of the mounting block 17', serve to thrust the block inwardly of the bed 14, while bolts 19, received in slots 20 in said block and threaded in said bed, serve to clamp said mounting block 17' in lixedpositions on the bed 1 1.

Ar inturned pair of clips or guides 21.,

secured to themountingblock 17, co-operate with similaropposing guides 21 mounted on the face ofthe bed 11:. Said opposed guides 21, 21. are arranged to loosely embrace the edgesof the body plate of a blank 13 and roughly direct the blank into position laterally of the bed 1 1, when such blank is introduced to the press. The depression I91 recess 16, in which the mountingblock 17 is slidable, extends inwardly of'the bed and beneath the position occupied by a blank B between the guides 21, 21"-. In said inner part of said recess 16 are seated two female punch dies 22, 22, each formed with four punch receiving apertures aligned longitudinally thereof. The punch die 22 is suitably secured to the bed 1 1 as by a bolt 23, said bed being supplied with punching outlets 24c registering with the apertures in said punch dies 22, 22. The punch die 22 is apertured like said punch die 22, its aperturesregistering with punching outlets 2 1 in the bed 1d, said punch die 22 being bound edge-to-edge with the: slidalole mounting block 17,' by means of bolts 25 reaching through said block and threaded in said die 22. 5

Co-operating with the shearing dies 1:3. 15 and with-the punch dies 22,22 are shearing and punching ii'ieinbers carried bylhe ram 16, the lower portion of said ram being cored out in the usual manner (Fig. 1) to lhe shearing membercompr ses a blade assembly C including a hanger-block 26 depending from the rain plate 16. blade clamps 27 b0lted to saidblock, and blades28, 28 held in said clamps 27. The hanger=block26, oblong in horizontalcross section, hangs laterally 0f the-ram 16, the blades 28, 28" being disposed face to face with the front and back ofgthe block respectively.

The clamps 27, cod at the opposite, edges of the hangerblock 26, bear: at their upper ends beneath shearing dies shoulders 26 (Fig. 5) on said block 26. These clamps 27 are formed with beveled surfaces 27 (Fig. (5) con'iplementing beveled edges 29 of the blades 28, 28 and are also formed 'with recesses 27" to accommodate shoulders 30 at the upper portions of said blade" 28, 2C. lioltslll, passing through the clamps 27 and threaded into the block 26, dra\vthe former against the beveled edges of the blades 28, 28 with the result that said blades are rigidly tightened against the faces of the hanger-block 26. Being thus bound and backed at their upper ends against the block 26 through the medium of the clamps 27, the blades 28, 28 are held securely to the rain 16. The cutting edge of each of the blades 28, 28 is shaped to con form with the upper surface of the body plate 1O of ablank .15 and is rcccssed as at 32 to acconnnodate the upstanding flange 1.1-" on said blank. the blades 28, 28 and hanger-block 26 is slightly less than the distance between the cutting edges of the shearing dies 15, 15 said blades being arranged on the ram 16 so that they will co-operate with said shearing dies 15, 15, whereby a blank placed upon the bed 14 will be sheared transversely on two lines ofseverancc. The punching member D includes a pendant'punch block 33 hanging from the plate 16 of the rain 16. This punch block 33 is oblong in horizontal cross'section and disposed at right angles 33 is formed with a horizontal groove 33 The combined thickness of therein and also with four upright grooves 33 (Fig. 4E). The latter grooves receive hardened, open sided chucks 3%, said chucks being clamped in their respective slots 33 at either sideof the punch block 33 by'ineans of clan'iping bars secured to said block-33 by bolts 36 passing through said bars 35 and threaded in the block Retaining flanges 3 1* (Fig. l) at the upper end of each chuck 34 fit in con'iplen ienting enlargement-s of its respective groove 33" and support the chuck 3-1 in place .in said groove preparatory to the binding of a clamping bar 35 thereagainst. Each clamping bar 35 is also supplied with a. retaining flange or lip 35 (Fig. 7) adapted to {it in its corresponding groove '33. in the punch block 33, said flange serving to support the clamping bar during the fitting of the 'bolts Stlto said block. Punches 37. one for each chuck 34-,fare inserted in said chucks and held. with tlieirupper ends abutting the punch blo'ck 33, atthe tops of the grooves 33", by means of set screws 38 punch-es on the other side of said block. These two grou1'3s of punches operate simultaneously upon a blank, one group punching four apertures in the black B for one tieplate sect-ion A and the other group punching four apertures in said blank for a second tie-plate section. In this connection it will be observed that the apertures in the punch dies 22, 22 complement said two groups of punches 37. Arranged centrally of each group'of punches 37 is an upright plunger 39, the same being sl'idable up and down in a vertical bore 40' in the punch block The two plungers' 39' are identical, each including a foot portion snugly slid-able in its respective bore 10 and also inchidiiw a stem 39 rising from the foot and slichible at its upper end in a bore in the rain plate 16. Fitted on said stem 39 above the plate 16 is an adjustable stop nut 11 which limits the depression of the plunger 39 with respect to the rain 16, under the action of an expansion spring 42 encircling theplunger 39 and backed at itsupper end against the lower side of the 'r'ar'n'plate 16 and at its lower end against the plunger foot. The bot-tom of the foot of each plunger 39 is normally in a plane beneath the lower extremities of the punches 37. lVith said parts thus related, the plungers 39 engage a blank B on the bed 14 before the same is reached by the punches 37. Giving way under the downward pressure of the ram 16, the plungers 39, yieldingly impinged against the blank, hold the same down against the bed 14 as said blank is struck and perforated by the punches 37. Upon the upward or return stroke of the ram 16, the plungers 39, acting under the force of the springs 12 keep the blank down against the bed 14 until the punches 37 are stripped therefrom, after which time, the stop nuts 11 engage the plate 16 and cause the plungers39 to rise with the rain.

The shearing edges of the blades 28-, 28"

rest sufiieiently beneath the lower ends of p the punches 37 so that the shearing of a blank precedes the punching thereof. This arrangement saves the. press structure against the combined strains in shearing and punching that would otherwise occur were the two operations to be effected simultaneously. 7

It being essential that the apertures 12 in the body plate 10 of a: tie-plate section remote from the flange 11 be accurately disposed with respect to said flange, I have provided a device for side registering a blank B on the bed 1 1 of the press. This device includestwo spaced guidebraekets 13, anchored at their ends on the bed 14 and transversely ov'erreaching the greater part of the body plate 10 of a blank B roughly guided between the clips 21, 21. Each guide bracket has a roller 13 j ournaled at the end there+ able head 46 and at the outer end of said carriage block 44 is an anti-friction roller 17, which is actuated by'a cam-like arm 18 depending from the ram 16. Urged inward by the action of said ar1nl8 against said roller 15, the head 46 is brought to bear against the outside of the flange 11" of the blank B with sufiicient pressure to slide the blank sidewise against the guide rollers 43. lYith the head 16 properly adjusted, the blank is accurately side registered thereby by the bringing of the inner side of the flange 11* closely against said two guide or registered rollers43. A roller 49 journaled in the frame 15 provides an anti-friction brace'for the back of the arm 48 and prevents it from springing away from the roller 47 on the carriage block 14, when the head ld thereon engages a blank B. Springs 50 stretched between lugs 51, 52 respectively fixed to the carriage block 14 and guide frame 45 retract the former when the camlikearm 48 is carried upward by the ram 16. This retracting throw of the carriage blockkl lremoves the pusher head 46 out of the way of'a blank B whereby the same may be freely introduced to the press and fed thereintofollowing eachworking thrust of the ram 16;

As the press is operating, the advance end of a blank B is thrust against an abutment preparatory to the descent of the ram 16. Said abutment comprises a screw 53, threaded in lug 54 depending from a bracket 55 traversing the a supplementary bed member 14h and anchored at its ends to said member. The distance between the face of said screw 53 andth e cutting edge of the shearing die 15" on the bed member 141 iscqual to the distance between said cuttingedge and the cutting edge of theshearing die 15 on the bed 11. 'l l1us. it will be understood that the two blades :28, 28 will sever two identical sections from the blank 13. The shearing bladesi28,'28 andtheir complementary dies 15, 15 have that relation withrespect to the punches 37 and their complementary punch dies 2' wherein the lines of severance of the blank-B fall between the grouped apertures made by the punches 37. In starting a blank B into the press, the foremost group 7 of punches 3'7 are first permitted to punch the blank at the end thereof. Said blank is then shifted forwardly to position barely out of the path of the forward blade 28-,

whereupon the two groups of punches operate upon the blank. Thereafter, the feeding of the blank is carried out in the normal manner, the end thereof being thrust against the abutment screw 53 followmg each working thrust of the ram 16. v

The tie-plate section severed from the foremost end of a blank B, falls into a chute iails of different weights and, in handling such variously proportioned blanks, it is clesirable not only that the space between the guide clips 21, 21 be adjustable, but that the punches 37 for perforating the body plate 10" furtherest from the flange 11 be adjustable to properly form said perforations with respect to said flange 11. Since the clips 21 are anchored on the adjustable block 17 and since the punch die 22 is attached to said block, said parts may be adjusted upon adjustment of the block 17". To properly locate the punches 37 complementing the adjustable punch die 22, I form differently proportioned chucks 34: in which the inner walls 34 (Fig. 4) thereof vary as to thickness. 7

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed-without departing from the spirit of my invention.

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

1. In a press of the class described, a frame, a bed thereon, a vertically reciprocable mm above said bed, shearing and punching elements carried by the ram, means on the bed con'iplementing the shearing and punching element's, said elements being arranged in tandem in the direction of feed to said press, the shearing element comprising a pair of blades for severing two sections freni a blank transversely thereof, the ynmching el'ei'i'ient comprising spaced punches for perforating two zones in the blank to be severed by said blades on a subsequent stroke of the ram, and a pair of opposltely arranged delivery chutes,,each disposed to re- .ceive one of the sections severed from the punching elements carried by the rain, means 7 on the bed complementing the shearing and punching elements, said elements being arranged in tandem in the direction of feed to said press, the shearing element comprising a plurality of blades for'severing sections from a blank transversely thereof, the punching element comprising spaced punches for perforating zones in the blank to be severed by said blades on a subsequent stroke of the ram.

3. In a press of the class described, a frame, a bed thereon, a vertically reciprocable ram above said bed, shearing and punching elements carried by the ram, means on the bed complementing the shearing and punching elements, said elements being ar ranged in tandem inthe direction of feed to said press, the shearing element comprising a. plurality of'blades for severing sections from a blank transversely thereof, the punching element comprising spacedpunches for perforating zones in the blank to be severed therefrom by said blades on a subsequent stroke of the ram, a plurality of delivery chutes, one for each section cut from a blank on one stroke of the ram, said chutes being arranged to receive their respective ssections and convey them to various selected points of delivery.

4. A press of the class described, adapted to punch holes in the body plate of a blank at a given distance from an upright flange on said body plate, said press including a frame, a bed thereon for said blank, a ram reciprocable in the frame above said bed, a punch carried by the ram, a member on the bed complementing said punch, means for registering, the blank with respect to the punch, said means including a bracket fixed to the bed and overreaching a portion of the body plate of the blank, said bracket forming an abutment for one side of said flange, a pusher member opposing said bracket and means operated by the ram for moving said pusher member against said flange and pushing the blank into position with the flange against said bracket.

5. A press of the class described for punching'holes in an object, the same includ ing a frame, a bed for the object, a ram reciprocable in said frame above said bed, a punchcarried by the ram, a member mounted on the bed and complementing said punch, means for registering the blank with respect to the punch, said means including an abutment for said blank and a device for pushing the blank against said abutment, and mechanism operated by the ram for shifting said device.

' 6. A press ofthe class described including a frame, a'bed thereon, a ram reciprocable 1n said frame above said bed, a punch block depending from said ram, laterally spaced punches carried in said block, one of said punches being ad ustable laterally of the ill) punch block to vary the distance between saidpunches, members on the bed complementing said punches, the member companion to said adjustable punch being adjustable to accord with the various positions of said punch.

7. A press of the class described including a frame, a bed thereon, a ram reciprocable in said frame above said bed, a punch block depending from said ram, laterally spaced punches carried by said ram, one of the punches being adjustable laterally on the punch block to vary the distance between said punches, members on the bed co1nple menting said punches, a block slidably adj ustable on the bed, a guide clip fixed to the 6 bed, an opposed guide clip fixed to said ad justable block, said clips forming guides for a blank to be punched, the member complementing said adjustable punch being fixed to said block, the movement whereof permits of the widening and narrowing of the space between said clips to accommodate blanks of different dimensions and the corresponding variance between the members complementing said punches.

8. A press of the class described including a frame, a bed thereon, a vertically recipro-' eating ram, a punch block depending from the ram and formed'with upright grooves n therein, open-sided chucks, one fitted in each groove, a clamping bar traversing the open sides of the chucks and binding said chucks in place Within their respective grooves, punches fitted in said chucks, set nuts, one for each chuck, said set nuts being threaded in the clamping bar and each adapted to be turned into the open side of its respective chuck against the punch therein for securing said punch in said chuck, and means on the bed complementing said punches.

9. A press of the class described including a frame, a bed thereon, a vertically reciprocating ram, a punch block depending from the ram and formed with upright grooves therein, open sided chucks, one fitted in each groove, said chucks co-operating with said block to prevent them from falling from said grooves, a clamping bar hung on the block and traversing the open sides of said chucks, bolts threaded in the punch block the open side of its respective chuck against the punch therein, and means on the bed complementing said punches.

10, A press of the class described includ ing a frame, a bed thereon, a reciprocating ram, a punch block carried by the ram and formed with a groove therein, an open sided,

chuck applicable to said groove and adapted to co-operate with the punch block and be thereby stationed in'place with respect to said block, means for clamping the chuck in its place in the punch block, a punch applicable to said chuck, clamping means for engaging with the punch through the open side of said chuck, said clamping means being adapted to bind the punch in place within said chuck, and means on the bed complementing said chuck.

11. A press of the class described including a frame, a bed thereon, a reciprocating ram, a block carried by the ram and formed with shoulders, blades abutting said shoulders at the butts thereof and disposed each with the inner face thereof against a face ofsaid block, said blades havingoppositely beveled edges, blade clamps complementing said beveled edges of said blades, clamping means co-operating with the blade clamps and with said block for securing the blades face to face against the block, and means on the bed complementing said blades.

12. A, press of the class described including a frame, a bed thereon, a reciprocating ram, a block carried by the ram and formed with a shoulder thereon, a blade abutting said shoulder at the butt thereof and disposed face to face against said block, said lade having a beveled edge, clamping means co-operating with said edge of said blade and with said block for securing the blade against the block, and means on the bed complementing said blade.

In testimony whereof, I have signed my name to this specification.

MELVIN OVESTRUD.

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