US1874416A

US1874416A - Tool holder for nut making apparatus

Info

Publication number: US1874416A
Application number: US437081A
Authority: US
Inventors: Samuel W Avis; Malcolm H Ames
Original assignee: Russell Burdsall and Ward Corp
Current assignee: Russell Burdsall and Ward Bolt and Nut Co; Russell Burdsall and Ward Corp
Priority date: 1930-03-19
Filing date: 1930-03-19
Publication date: 1932-08-30
Anticipated expiration: 1949-08-30

Description

Aug 30, 1932- s. w. Avls ET AL 1,374,416,

TOOL HOLDER FOR NUT MAKING APPARATUS INVENTO A. W M v M, A 21 BY p m wwmvzwa.

ATTORNEYS Aug. 30, 1932.

s. w. AVIS ET AL TOOL HOLDER FOR NUT MAKING APPARATUS Filed March 19, 1950 4 Sheets-Sheet 2 Q3 n NS. 5 ww w wMWw /V I, $3 QUE? INVENTOR Ail fin): v m. 62AM p wmwww ATTORNEYS Aug. 30, 1932. s. w. AVIS ETAL TOOL HOLDER FOR NUT MAKING APPARATUS 4 Sheets-Sheet 3 Filed larch 19, 1930 INVENT I llllll| llllllll .u m i ETTNH "f n" J. m.

AMQMYMN ZEM ArroRNEYs Aug. 30, 1932. 5, w; v E AL 1,874,416

' TOOL HOLDER FOR NUT AiAKING APPARATUS Filed larch 19, 1930 4 Sheets-Sheet 4 INVENTOR 4w. an Y M. Ma

BY 4 M, bwwmwiwwza ATTORNEYS Patented Aug. 30, 1932 UNIT L TATQ S saMUnL w. we, on humus, conn acrxourr; Anni unicorn i1 amiss; or wamnam, massacnusn'rrs, ASSIGNORS TonnssELninUnnsau. a wean BOLT a NUT comranzor roar cnasma; nawcvoama coaroaarxon or new Yoax e flbmifmen museums application flIeIIarehiB,1930. Serial.No. 4 3 7 ,081.

This invention relates to' apparatus for forming nut blanks. In a 'copending application of Samuel W. Avis, serial No. 287,795 filed J une 23, 1928,;there is described and claimed a process of makingnut blanks by cold punching in whichg'the volumebfthe blank is substantially equal to thevolurne of the finished nut. The apparatusherein described and claimed is particularly suitable for use in practicing ,the' Avis-process. i i

In the manufacture of-nut blanks bythe cold punch process now in 'use, the waste or scrap amounts to substantially 50 percentof the material; 'As morefu'lly describedin the Avis application, this waste can be substantially eliminated" by forcing outwardly -'a metal blank of substantially the same volume as the volume ofthe finished nut to form the central opening of-thenut, and produce a blank of the desired size. To carry out this operation on a commercial scale, it'isnecessary to form the central opening ina series of punchingoperations, and thepresent machine is designed for the purpose of performing this series of punching operations simultaneously on a: plurality of blankscarried by a dial or other suitable supporting'member, said dial having'a step by step movement, whereby the production of the machine may compare favorably, with the production of a machine of the prior art 'inwhich the central opening is formed in a single punching operation. t

We accordingly provide a machine consisting of a dialhaving a plurality of die pockets, together with means for imparting a step 'by step motion to the dial. 1 A tool holder and stripper block is arranged on each side of the dial and means are providedfor reciprocating them toa close'd position and to an open position. The dial driving means is synchronized with the reciprocating drive means to movethe dial while the tool holders and stripper blocks are in open position. Thetool'holders are provided with anumber of punches or other tools'corresponding in number tothe number of die'pockets in the dial, so that at each closing of thetool holders, a separate operation may be performed on a nut blank in each pocketm' Suitable :Fig. 3.

means "are provided for automatically feeding the blanks to the dial at the first station, thefeeding mechanism being actuatedupon each m'ovement of the reciprocating parts of the machine to feed one blank; andmean's are provided for ejecting the finished blank from the-dial. V y

v The machineis alsoprdvided withsuitable safety means for automatically disengaging the-dial from the drive 'mech'anl'sm up'on breakage of any of the punches, or displacement 0f'the blanksfr0m the die pockets tother with means for returning the dial to its last operating position so that the dial pockets Fiwill be iiin alignment with the punches', and injury to the apparatus will 'be prevented. c i Inthe accompanying drawings we have shown "one form of the invention. l

In the drawings Figi 1 is aplan view; 1

F g; 2 is a side elevation i V i Fig. 3 is'al vertical, sectional view on line of Fig. 1 on an enlarged-scale; 1

" Fig. -4,'s aplan viewon the-same scale Fig. 3 with the top casting removed, a nd with 'partsibroken away for clearness; and i Fig. 5' is a vertical, sectional view on-line 5--5 of Figs. 2 and 3 onthe same scale as Referring to drawings, the reference numeral 1 designates the'lower portion of the 1 main housing. The upper portion 2 is .arranged over the lower portion of the housing and provided with a cover '3. The machine is driven-bymeans of a motor 4 (see Fig; 1)

arranged at oneendof the niachine'and sup ported on the upper section 2 of the housing.

The motor is provided with a-motorshaft- 5.

The motor shaft 5 carries a coupling 6, connected to a stub shaft 7, mounted in a housing 8. V A pinion9 (see Fig. 2) ismounted on this stub shaft and drives an intermediate gear or pinion 10 mounted on an intermediate shaft '11. V The gear 10-Ineshes witha gear 12 mounted one main drive shaft 13. The drive-shaft 'is provided with a fly wheel 14 and with an electric clutch 15 (seeFig 1). A brake-drum band 17 controlled by a magnet or solenoid 18. The drive shaft 13 is also provided with a pair of pinions 19 each of which meshes with a gear 20 mounted on a crank shaft 21. The crank shaft 21 drives a crank arm 22 (see Fig. 3) which is connected to a vertical, reciprocating slide 23. This slide works in upper and lower guide members consisting of castings 24 and 25 carried by the'upper and lower castings 2 and 1, respectively. The cas'tings'24 and 25 may be provided with wear plates orfacings 26 adapted to be engagedbythe slide. Intermediate its endsthe slide 'is provided with a rectangular opening for the reception of a pair of bearing blocks 28. These bearing blocks are adjustableby means of awedge 29 having suitable adjusting means 30. Each side-of the slide is provided with a pair of bearings-31 (see Fig. 4) adapted to receive'a pin 33. V Alink 34 is carried by each-of the pins 33. As shown, the link is provided with an opening adjacent its end for the reception of thepin and a bushing 32 which surrounds the pin. The end of the link is rounded and adapted to be received in a concave recess in the-bearing block 28. 7 One of the links 34 is connected to a rear slide 35 which is adapted to reciprocate on a suitable bed at right angles to the vertical slide 23.; The bottom of the slide 35 engages a wear plate 36 and one side of the slide engages a portion of the housing. The other side engages a wedge-shaped wear plate '37, thus permitting adjustment and alignment of the slide. The face of the slide is recessed to receive a bearing block 38 having a concave face and the end of the link 34 is rounded to engage the face of the bearing block. This end of the link is provided with an openingadapted to receive a bushing 40. A pin 39 extends through the bushing 40 and is received in bearings in the side walls ofthe rear slide 35. The bearing block 38 is also provided with an adjusting wedge 41 having suitable adjusting means 42. 'I

The other link 34 is similarly connected to a center slide 43 which is also recessed as herebefore described for the reception of a bearing block 44. The bearing'block 44'is adjustable by means of a wedge 45 and wedge adjusting means 46. The bearing block 44 is shaped similar to the bearing'block 38and is also adapted tobe engaged by the rounded end of the link 34. The link is also provided with .an opening to receive a bushing in whichis mounted a pin-47 which is received in bearings in the side walls of the center slide. By providing the

bearing blocks

28, 38 and 44 --the thrust of the drive from the vertical slide 23 'to the rear slide 35 and center slide 43 is taken off the pins 33, 40 and 47 and transmitted through the bearing blocks and'the links to the slides. The bearing blocks-may be adjusted when necessary, through their respective wedges to retain the roundedv ends of-the links 34 in contact with theconcave faces of the bearing blocks so that the thrust is conveyed through the bearing blocks to the slides.

A front slide 48 is connected to the rear slide 35 to reciprocate therewith. The center slide is provided with openings adjacent each corner (see Fig. 5) through which pass tie rods 49 and these tie rods are surrounded by tubes 50. These tubes enter openings in the A front and rear slides andengage shoulders 51 formed by a reduction in the size of the opening. The rods extend through the reduced portion of the openings as indicated at 52 in Fig. 4 of the drawings and are provided with nuts 53 on their ends. The front and rear slides are thus tied together by the rods 49 and tubes 50. Before assembling the rods 49 are heated, and they are placed in the tubes and tied together while still hot. The rods contract on cooling and the housing 58 into a housing 59 at the front of the machine. .The lower end of shaft 56 is providedwith-abevel gear 60 meshing with a'bevel gear 61 mounted on a cam shaft 62. The center slide 43 and the front slide 48 are providedwith tool holders 74. The tool .holdersare mounted on the slides by means of a tongue and groove and. are capable of being adjusted to properly center them.

- A stripper block 89 is mounted in front of each'of the tool holders. Each of the stripper blocks is provided with a plurality of concentric openings, preferably four in number, and a supporting stud passes through each of these openings and is received in an aligned opening in the tool holder.

A dial98 is arranged between the pair of stripper blocks (see Fig. 3).

A link 360 may be connected to the bottom of the vertical slide 23 and this link is connected'to a bell crank lever 361 pivotally V mounted as at 362 in a bracket 363 carried by the lower casting. The other end of the bell crank lever is connected to the connecting rod 364 of a piston 365 which is mounted in a cylinder 366 arranged on the casting 1. The cylinder is provided with a plurality of air'ports 367 arranged at a distance from the head of the cylinder so that the outward movement of the piston will'trap a body of air in the cylinder and cushion the moveup the unused energy of the upstroke and give it off on the down stroke, thereby adding to the power of the down or working stroke. This results in considerable gain in machine efliciency and higher speed is attained.

On the outward movement of the front slide 48 the nuts 53 on the ends of thetie rods move to a point beyond the vertical plane of the supporting casting 126. The casting is provided with openings through whichthe ends of the rods and the nuts pass and these openings are provided with cover members 371 which are substantially cup-shaped and the bottoms of which are spaced from the supporting casting 126. These cover plates may be secured in position by bolts 3 2 passing through aligned openings in ears 373 of the cover plates into openings in the casting. These cover plates prevent the oil used in lubricating the dial and its associated parts 7 from entering the housing of the cam shaft 62 and mixing with the lubricating oil employed in this portion of the machine.

We claim: 7

1. In a nut making machine, a front slide,

a center slide, said slides being reciprocal in independent paths,tool holders carried by said slides, a rear slide connected to said front slide, a vertical slide arranged between said rear slide and said center slide and links connecting said rear slide and center slide to said vertical slide to reciprocate them in opposite directions.

2. In a nut making machine, a front slide, a center slide, said slides being reciprocal in independent fields, tool holders carried by said slides, a rear slide arranged adjacent said center slide, rods connecting said rear slide and said front slide, compression tubes surrounding said rods, 2, vertical slide arranged between said rear slide and said center slide, and links connecting said rear slide and said center slide to said vertical slide to reciprocate them in opposite directions.

In testimony whereof we aflix our signatures.

SAMUEL W. AVIS. MALCOLM AMES.