US2444757A

US2444757A - Article forming apparatus

Info

Publication number: US2444757A
Application number: US575888A
Authority: US
Inventors: Stastny Jacob
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1945-02-02
Filing date: 1945-02-02
Publication date: 1948-07-06
Anticipated expiration: 1965-07-06

Description

July s, 1948.

J. STASTNY .QRTICLE FORMING APPARATUS 2 Sheets-Shet 1 Filed Feb. 2, 1945 M/VM/m? J 57457710 y 6, 1943- x J'.- STASTNY 2,444,757

ARTICLE FORMING APPARATUS Filed Feb. 2, 1945 2' Sheets-Sheet 2 20 A K wwz-wrm v 6'7457/VV' @"kw 34 BA 5y 4 Z Patented July 6, i948 2,444,757: -t ARTICLE FORMINGI'APPARKTUS Jacob Stastny, Chicago, 111?,

Incorporatedr, New York, of Newrlork.

Electric, Company, N .1 Y., a corporation assignort'o Westerm Application February 2, 1945, Serial; No. 575,888"

I This invention relatesto artioleforming apparatus andmoraparticularly to 'anapparatus for forming angularly shaped article'sfrommetal blanks.-

Anobject ofthe-invention is't-oprovide a praccable and efficient apparatus for forming angularl y shapedarticles with 'a'mi'nimumof wear on the 11 apparatus and the elimination Y ofv defective articles.

In accordance'W-ith the above-object,- thepresent invention, in one embodiment thereof, as applicd-to theformingof-magnet cores for telephone receivers, whichi mav comprise a right :angul'arly shaped piece pa-rt of relatively heavy gauge metaliormedfrom a T -shaped1flat blank, comprisesaa punch and die apparatus having a yieldableublank...supporting:member and a stationary die supporting" a rotatableanvil, the blank supporting member-and -anvil being provided. with; cooperating seats: for. receiving and positioning. opposite ends of then-flat; blank. A reciprocataatlole punchuponbeing operatedadowmwardly; first clam-ps one. end of the blank to:.the blank .-supporting member and,,: in: :thecontinued descent of-the. punch andnmem-ben; the. s-vertical armi-of-the T-shaped blank is foldedzupwardly between opposed" cooperating die. faces on: the

v punch. and die. During; this: latter: unitary amovementzod, theblank, punch-candmembergtheoro- .tatable-anvilis. rotatably. indexed? 9,0. without any; appreciable sliding-of the" armz-ofthm blank on. its anvil seat, the. anvil-:merelyz-rotating: due to the pressure of thearm.;seatedrethereom the movementnterminating'. upon the yielda'blesmember being seated: against apositive: stop; surface. Thus, all sliding friction between. the: anvil and the piece: part :is substantially; eliminated and, consequently, no appreciable wear OOCUI'SJIOIIFthG anvil; and .noheat tendingatothurn; the: piece part is generated. Also; the r piece-part .iszcompletely formedand. the: bent set; with the positive stop.- ping of the yieldablemember.

Other objects and advantages :of vthe invention will more fully: appear from the: following. de-

tailed description taken. inconjunctiom with the accompanying. drawings,. in which- Fig., 1 1 is 1 afragmentary central vertical. section through a formingapparatus embodying. the features of the. invention-,-, thesparts. being, shown inathe positions assumedtherehwat the: completion of the article forminggoperation;

Figa. .2.-is.aa.p1an. view =of the: lower portionztof theaapparatus;

Fig. 3 is a fragmentary central vertical: section taken on the dine \-3-3--o,f. Fig.1 2,; the 1 parts being (Fig-1.1:) formed; :from

=vention-;-' the. punch: press has not which reciprocatably rectangular shaped head :21; the

guidezandbearing blocks 32- (Fig; at oppositeends. of-the diemember 30-. The

magnet core .blanlc'showing, in: broken outline, l0 "1 the -bentup :arm.

The present embodiment'of the inventiona as shown in the .tdrawings may be used-1 advantageously:- for: forming angularly shaped .parts .or articles sucn as; for example, a magnet 'core- Ill] aJT-shapedv fiat blank ll (Fig. fila-ofs'relatively heavy gauge metal, a. vertical 'iarm l52*- being: bent. at right angles adjacent aehorizontal ;arm;.. I32 it v .Aszshown .in .the drawings, referring particu- ;-larly, t0:;F:ig.; 1, themagnet icore'forming apparatus embodying the features of this invention may-me-aoperatively connected to. a punch press, whichi-may been any: usual type. Since. it is, not essential; to a: complete understanding oftherinbeen. fully illustrated; exceptthose-par'rts dirgectly concerned with thisrinvention, which consistof the following; Avertical reciprocatable platen and a stationary bed. Hi and ll, respectively. Fixed tothe upper face-r-of the press bed 121 is a bolsterzplate -I8;;,t0 '-Which-.;is secured, by screws l9, together withtaplateiill, a rectangular shaped: frame- .21, having-, ra similarly-"shaped aperture 23:, the; plate being provided with :a circular aperture 24', .in guided a shank portion 25t-of circular-cross. section of a spring pressed pad 1 or blank. supporting. member 26; having; a end faces of which slide :uponfopposite faces of the frame aperture;23.. Withinntheframe aperture .23uat opposite- :longitud-inal sides of the head 21. :isa die member 30 and a guideblock 3l; the=side faces, of the head being slidable on Opposite faces. thereof and also upon combined guide block- 3t and-bearing-blocks 32 and the die memberBIL-abu-t-the upper face of the plate 20 and-.-are-.-fixed :to adjacent wallssof the. frame aperture-23.:by screws '33: and 34-, respectively; (Fig.

2);. A -shouldered; face-35 onthe blank supporting member- 16 formed at the juncture of the shank portion 25. and head :21 of the-supporting mem berengages the upper face of the fixed. plate 2min:therextremelowered position. of the sup-- the adjacent .2) arranged ing blocks 32 is a rotatable anvil 46 (Fig. hav-.%

ing an enlarged portion intermediate its ends provided with spaced circular end portions 42, which bear and rotate upon an arcuate bearing surface 44 formed on the die member 30. At its right side (Figs. 1 and 2) the die member is cut out to form a die recess, indicated at 45, to receive the arm i2 of the magnet core l0 during the'forming operation, the recess being formed at a suitable angle from vertical to facilitate the forming and setting of aright angle bend. A portion of the anvil 40 between the circular portions 42 is formed with four equally spaced plane or flat faces 46 (Fig. 5), one of which is always in line with an inclined rectilinear face of the die recess 45. Another of the anvil fiat faces 46, the upper one, as viewed in Figs. 1 and 2, is always in line with an. inclined upper face 41 of the die member .30, which is disposed at right angles to the referred-to face of the die recess 45. The upper end face of the blank supporting member 26 has an inclination similar to that of the upper face 41 of the die member 30 and has a T-shaped seat 48 formed therein for receiving and positioning the horizontal arm [3 of the T-shaped flat blank H, the vertical arm l2 of the blank being seated and positioned on the uppermost fiat face 46 of the rotatable anvil 46 and between the circular portions. 42 thereof, as shown in Fig. 3, when the blank supporting member is in its normal upper position.

Carried in each of the bearing blocks 32 is a spring pressed ball detent 5!, which, in cooperation with a set of four equally spaced suitably shaped-depressions 52 in each reduced end of the anvil 46, serves to yieldably retain the anvil in its-indexed position at the termination of each forming operation, to be referred to hereinafter.

The reciprocatable platen i6, which receives -motion from a suitable power source in a wellknown manner, is guided in its movements on a plurality of rods 53 fixed to the bolster plate l8, one of the rods being shown in Fig. 1. Attached to and depending from the platen I6 is a punch 54 having a lower blank engaging face 55, which has an inclination similar to that of the upper face of the blank supporting member 26 and the upper face 41 of the die member 30. Upon its left side, the punch 54 is formed with an inclined rectilinear die face 55, which is parallel to the referred-to similar face of the die recess of the die member 30.

In the operation of the above-described apparatus, a T-shaped flat blank II is first mounted in'position on the apparatus, as shown in Fi 3,

'wherein its vertical arm, l2 rests on the uppermost flat face 46 of the rotatable anvil 40 between the circular portions 42 of the anvil and the horizontal arm 13 and the adjacent portion of the arm I2 in the T-shaped seat 48 formed in the upper end face of the yieldable blank supporting member 26. Thereafter, the punch 54 is caused'to descend, whereupon the blank I H is first firmly clamped to the blank supporting member 26, and as the punch continues to descend, carrying with plate "2 0, at which sition of the punch 54 and blank supporting member 26, as shown in Fig. 1, is maintained. Downward motion of the parts is positively halted upon the shouldered face 35 of the blank supporting member 26 engaging the upper face of the fixed instant the angularly shaped magnet core U3, is formed and its bend set with the outer arcuate face thereof at the juncture of theright'angle bend in the arm l2 seated at the As the arm IL'r'estingbn the flat face 46 of the rotatable anvil 40,- is folded upwardly during its bodily downward movement, the anvil is rotated clockwise 90 due to the pressure of the arm 12 thereon, but no appreciable sliding friction, occurs therebetween to cause wear on the anvil and no heat is generated, such as would burn the formed article. Upon completion of the forming operation, no change in the relative position of theanvil face 46 and the arm if of the article has taken place and another anvil face 46 has been positioned to receive the following blank to be formed. In the retraction of the punch 54, the spring pressed blank supporting member 26 follows, thus elevating the formed article to the dotted outline position, as shown in Fig. 3. Due to the inclination of the die recess 45 in the die member 30 and the cooperating die face 56 on the punch 54, the completed article is elevated with a minimum of friction between the engaged faces of .the article and the die member 36.

What is claimed is: l

1. An apparatus for forming angularly shaped parts comprising a stationary diehaving a forming surface, a rotatable anvil having a surface upon which one portion of a part'is seated and which is movable into the plane of said forming surface, a movable member cooperating with said anvil to support another portion of the part, a plunger for gripping the-part to said member and moving it past said anvil to bend the part therebetween and thereafter, in cooperation with said forming surface, forming the part, and means for maintaining said member inoperative relation with the part and plunger during the bending and forming of the part.

2. An apparatus for forming angularly shaped parts comprising a stationary die having a forming surface, a rotatable anvil cooperating with and arranged above said forming surface, said bottom of the die member recess 45.

anvil having a surface upon which one portion of a part is seated and which is movable into the plane of said forming surface, a movable member arranged laterally of said die for supporting another portion of the part, a plunger for gripping the part to said member and moving it together with said member past said anvil to bend the part therebetween and thereaftenin cooperation with said forming surface, forming the part, and means for maintaining said member in operative relation with the part and plunger during the bending and forming of the part.

3. An apparatus for forming angularly shaped articles from blanks comprisin a stationary die having-a forming surface, a rotatable anvil having a surface upon which one portion of a' blank is seated and which is movable into the plane of said forming surface, a yieldable member upon which a second portion of the blank is seated, and a reciprocable punch having a die surface cooperating in its movement with said member and said die forming surface to first clamp said second blank portion. to said member and, in its continued movement, to bend said one blank portion between said cooperating die surfaces, said anvil being rotatably indexed during the bending operation without change in relative position between said one blank portion and said anvil.

4. An apparatus for forming angularly shaped articles from blanks comprising a stationary die having a die formation, a rotatable anvil having a plurality of equally spaced seats movable in succession into the plane of said die formation mounted above said die, one of said die seats be ing normally in position to seat one portion of a blank, a yieldable member mounted laterally of said die upon which a second portion of the blank is seated, and a reciprocatable punch having a die formation on a side face thereof cooperating in its movement with said member and said stationary die formation which is arranged parallel to said punch die formation to first clamp said second blank portion to said member and, in its continued movement, to bend said one blank portion between said cooperating die formations, said anvil being rotatably indexed during the bending operation without change in relative po sition between said one blank portion and said anvil.

5. An apparatus for forming angularly shaped articles from blanks comprising a stationary member having a die formation, a rotatable anvil having a plurality of equally spaced plane faces movable in succession into the plane of said die formation upon one of which one portion of a blank is seated, a yieldable member upon which a second portion of the blank is seated, and a reciprocatable punch having a die face arranged parallel to said die formation and cooperating in its movement with said yieldable member and die formation to first clamp said second blank portion to said yieldable member and, in its con- 5 tinued movement, to bend said one blank portion between said cooperating die face and die formation, said anvil being rotatably indexed during the bending operation without change in relative position between said one blank portion and said anvil.

6. An apparatus for forming angularly shaped articles from blanks comprising a stationary member having an inclined die formation, a yieldable pad arranged laterally of said member and having an inclined end face formed with a seat for locating one portion of a blank, a rotatable anvil having a surface upon which a second portion of the blank is seated and which is movable into alignment with and contiguous to said die formation, and a reciprocata-ble punch having a die face parallel to said die formation and cooperating in its movement with said pad to first clamp said first blank portion to said pad and, in its continued movement, to bend and set said second blank portion between said cooperating die formation and die face, said anvil being rotatably indexed during the bending operation without change in relative position between said second blank portion and said anvil.

JACOB STAS'I'NY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 240,174 Pearce Apr. 12, 1881 410,771 Samson Sept. 10, 1889 1,304,152 Briegel May20, 1919