US1684140A

US1684140A - Broach mechanism

Info

Publication number: US1684140A
Application number: US181841A
Authority: US
Inventors: Julian L Perkins; Hiram D Croft
Original assignee: Perkins Machine & Gear Co
Current assignee: Perkins Machine & Gear Co; PERKINS MACHINE AND GEAR Co
Priority date: 1927-04-07
Filing date: 1927-04-07
Publication date: 1928-09-11
Anticipated expiration: 1945-09-11

Description

Sept. 11, 1928.

J. L. PERKINS r AL BROAQH MECHANISM Filed April 1927 INVEN'IORS.

' (l- W I ATTORNEY.

Patented Sept; 11, 1928.

UNITED MASSACHUSETTS, Assret'rons, TO rnnxjrns ,MA HINE ANDQEAR C MPANY, or

SPRINGFIELD, lvrli'ssnonv'snrtrs, A CORP oRA'rIoN or MASSACHUSETTS.

mma Manama,

'A pmaaan flied mil 7,

Unr invention r'elates' to improvements in mechanism for automatically changin the position s of reciprocating breaches, and cons'i sts generally of i'n'eans for holding hroaohes, means for attaching 'aid first-named means to a r'e'ciproeatingmemb'er in such a; manner that movement of the hroaches at rightangles to, the movement of said mernber i s permitted, means autcmat ipan t0 slntf, smd firt-hamed niean s' eaeh time said member approa ches either end of its travel, and means to hoid Said broaiches against lateral inot e- Inent While either is passing through the cotting field, together with such other parts and Ineniher as my be hecesary or desirable order to render the rilechanis ihfc'ornplete and serviceable in ever respect, an as: hereinafter set forth. H a H The pri' airy object of our invention is to provide comp aratively V simple, H etrong', dfirable, and highly effic'ieht, .rn'e'chanism for automatio'ally shifting laterally, first in one and then in the other direotion, two hr oache or two hii of'hroaches to locate thetn altbr nately or one after the other in the gutting field or hroaohing jboeit ion, to the end that the c ultti or breaching epmti on i'spra ti- Cally continuous. that is to say, when the breaches or two 1 of broaohe 'deeoend one of them makes a cut, and'tvhen they 'ase'end theother makes a cut, and op anofnof broach ing is thereby ni'at'erially aceelerated, and the production of thernaohine eq ipp d, with our meeha'riism correspondingly ins i. ,o ,l,

,A Lhothe r ohject is to prodnce a mechanism oi ,thi s' eharatetwhich i S'poSitive and aocu} i i bvfifid a. a, 1; Other objeot and a dt'antages will appear in the Coiirsddfthefdllowin d epriptioh.

This rnechanijsxn iLQdeSigned to be incorpob e th g m ch Ofthe t pes disclosed. in Lotte/r5 Patent of the United States, No. 1,642,593. v n 1 n n Ve att in the ohjeots and ie'eeur'e the advaninvention. the mechanism tag'ee ofour 4 I v v r v lustrated he accompanylng drawmgs, 1n

Fi el which efhbddieis 'a volition owin the e; 'asseua:

top vietyof broaeh' Ineehanim' he same in connegtion yyith d" parte and nie. ere of:

praeti gal form of our 1927. swarm. 181,841.

a bro'aehing 'rn'aohine'; Fig. 2, a left-hand si die elet ationof said mechanism and said'part'e' and members, with portions broken dut and broken away; Fi 3,, a front elevat on of said rneohanisni, or 'enongh of the same to Show its disposition when the hroache are at the up'per end of their travel; la r view showing the disposition, 61 'said mechanism when said-,broaohes' are at the lower endof their travel; Fig. 5, a orh's edtion through portions of said rh'echa nisrri, taken on hnes 5-5, looking d'otirn, in Fig. 3,

and; Fig. 6, alright-hand side erevat'idn 51 said mechanism,

Similar reference char cters aesi hat' similar part-s throughol'it the'eyeral vitir'. The old parts and 'rxi 'n'lh'ers Shawn in connectwn herewith as' necessary for a conijiilete understanding of the present invention oihprise column 1, a. r'arn2 arranged to reciprocate v ertloally on gald eolu'rrin, and provrdedonone slde wlth a rack 3. and a pinion 4 rntermeshl'ng mph sald rack, "said pinion being mounted on a 'sihait 6. ,r'om anti snit- A ,[R-WP, able source of motlve power the shaftfi 1s caused to rotate,- and, throripfih the inedinhi of the pinion 4 and the rack-3, to

ram 2 o'n'the 'eoliir'nn 1i Rever n means for the shaft 6'; and matinee; bring abbht' the operation of said reversing riie'ani each tiiri the mm 2 arriv s atjeither and of its tiavel, are required, but these are na shcwn Beanie the natnr of the same i wen mideretbb'a; Inthis conncti n, hbwevr; ifer'efi'em be; had to Said patent.

Broaeh'es eueh a are'ns'e'd iii this art 'zi'r' usually made up in sections arranged hd t6 end,- Sothat the separate fseetiiingbr maniaual broaj che, to a1} intehts and pfirp ose's', feral b g br'oach, and they wilrliiei n he' considered; Two broaoh'e e of thi s h charaotei' are represented at 7 and 8, respeotifvelyathe' branc 7 beimzat the tartan- 1 chebiroacri s the right. broach oaton the d Wn stroke and the broa qh g-cnts' on the strolge,

Aa i a h e 91.151 pmia for the broachee 7,, and 8'. holder inotlnted on the fabe ofthe r m, 2 in the manfiephrin; after described; and. has-n the 1o'r igitdg1inal center thereof a'slot lOto receive-the bodies of the broa'c'h f wl'liqh; bod

*I .;:i r, 111. eross' seamen 1s dovet 11 111 form.-

sides of the slot are undercut to receive the outermost inclined sides of the bodies of the broaches 7 and 8, and a wedge bar 11 is received in said slot with the inclined sides of said bar against the inclined inner sides of said bodies. The depth of the slot 10 is greater than the thickness of the wedge bar 11, and screws 12 are employed to secure said bar to the holder 9 and force the bodies of the broaches, by the action of said bar thereon, tightly into place in said slot. Abutment blocks 13 3 are secured by screws or other means to the holder 9 above and below the breaches, said blocks being seated in the slot 10. Thus it is seen that the two breaches are rigidly secured in parallel relation to being in position to receive the holderliietween them with a sliding fit. At 16 is represented an ordinary shim which may be used between one of the bars and the adjacent edge of the holder 9. The bars 15 serve the double 7 purpose of retaining the holder 9 against the face of the ram 2, and of affording guides for said holder when the same is moved laterally.

In order to provide additional guiding means for the holder 9 in its lateral movement, and further insure the straight-line accuracy of such movement, one or more bars 17 are provided, there being three in the present example. These bars are let into the contiguous sides of the ram 2 and the holder 9,

at different elevations between the bars 15.

Each bar 17 is secured by screws or other means to the ram 2.

From the foregoing it is clear that the holder 9, with the broaches 7 and 8, can be moved both to the right and to the left on the ram 2, or at right-angles to the reciprocating movement of said ram which carries said breaches up and down in the direction of their length.

An upright 18 is located at the left of the ram 2, and has at the top a rearwardlyextending flange 19 that is bolted at 20 to the column 1. The upright 18 has its lower end bolted at 21 to a fixed part 22 of the frame of the machine. On the face of the upright 18 adjacent to the longitudinal edges thereof are vertical guide ribs 23. Secured by screws or other means to the face of the upright 18 adjacent to its upper end is a cam plate 24,

and similarly secured to said face of said upright adjacent to the lower end thereof is a cam plate 25. The bottom end of the cam plate 24 inclines from above downwardly and outwardly, and the upper end of the .cam

plate 25 inclines from below upwardly and inwardly. Secured by screws or other means to the face of the upright 18, between the ribs 23, is a vertical cam bar 26. The inner edge of the cam bar 26 is in line with the inner edge of the cam plate 24, and the outer edge of said bar is in line with the outer edge of the cam plate" 25; and the upper end'of the bar is parallel with the adjacent end of the upper plate, and the lower end of the bar is parallel with the adjacent end of the lower plate. The spaces between the cam bar 26 and the guide ribs 23 are equal to each other in width; and the spaces between the adjacent ends of said bar and the two cam plates are also equal toeach other.

Secured by belts or otherwise to the lefthand edge of the holder 9 is a bracket 27. The bracket 27 extends out over the upright 18, and is provided on the back side, at the left-hand edge, with two anti-friction rolls 28, one directly above the other. The diameter of each roll 28 is approximately equal to the width of any of the channels between the

cam plates

24 and 25, the cam bar 26, and

the ribs 23, and the length of a'line passing through the axes of the rolls 28 and extending from the top of theperiphery of the upper rollto the bottom of the periphery of the lower roll is approximately equal to the width measured vertically of either of the spaces between adjacent ends of said plates and said bar. I

lVith the parts disposed as in Fig. 3, the breach 7 is in the breaching position or the cutting field, and with the parts disposed as in Fig. 4, the broach 8 is in said position or field.

Starting with the movable parts disposed as in Figs; 1, 2, 3, and 6, and assuming that the ram 2 is descending to make acut-with the broach 7, the complete operation of the mechanism at each cycle of the machineis described as follows: 7

The rolls 28 initially are in the channel between the right-hand rib 23 and the cam ill) plate 24, and said rolls remain in contact with said rib until the ram approaches the lower end of its travel,-passing from said channel into the channel between said rib an dthe cam bar 26. By the time the rolls 28 are in the intermediate channel the broach 7 begins to make its cut. Directly after the cut is completed the lower roll 28 encounters.

the inclined end of the cam plate 25 and is actuated thereby to the left, this and the companion roll28 passing through the space between the adjacent ends of said plate and the bar 26, and into the channel between said plate and left-hand rib 23. In moving to the left the rolls 28 carry with them the bracket 27 and the holder 9, the latter sliding between the guide bars 15 and on the guide bars 17. The movement to'the left imparted to the holder 9, when the rolls 28 pass from [vii AQQQAQO the'channel between the right-.hand rib 23 and the bar 26' into the channel between the lei'at-hand rib 23 an d the cam plate 25, isjust the. right amount to position the broach 8 in the cutting field.

Upon the reversal the. ram 2 and the be ginning of the ascent thereof, the rolls 28 are moved up in contact with thelef-t-hand rib 23. into the channcl between said rib and the bar 26. Beforethe rain; 2; arrives at. the upper end of its travel, the upper roll 28 en counters the inclined end of the cam plate 2% and is carried thereby to. the. right, both this and the companion roll pass between the adjacent ends of said plate and the bar 26 into contact with the rightehandrib 23, and

then they move up. into the channel between said rib and said plate. This movement of the rolls 28 causes the bracket 27 and the holder 9 to be actuated'to the right, between the guide barsl5 and on the guide bars 17 as before, the required distance again to position the broach 7 in the cutting field. Direct.- ly the ram 2 is reversed and the double cycle of operation described above is repeated, another reversal of the ram being involved in said double cycle. Thus it is seen that the broach 7 is active at each down stroke of the ram, and the broach 8 at every up stroke of said ram;

While the broach 7 is making its cut, said breach is held securely against lateral movement, because during that time the rolls 28 are in the channel between the guide bar 26 and the right-hand rib 23, and, while the broach 8 is making its cut, said last-named breach is held securely against lateral movement, because said rolls are then in the channel between said bar and the left-hand rib 23.

By changing the wedge bar 11 and the abutments 13 broaches of different lengths and sizes can be substituted for the broaches 7 and 8.

More or less change in the shape, size, construction, and arrangement of some or all of the parts of this mechanism may be made without departing from thespirit of our invention, or exceeding thescope of what is claimed.

What we claim as our invention, and desire to secure by Letters Patent, is- V 1. In mechanism of the class described, a reciprocating member having a fiat. face provided with a holderfor broaches adapted to cut alternately when moved in opposite directions, and means automatically to move said holder laterally on said face, first in one and then in the other direction, as said reciprocating member approaches the ends of its travel. 2. The combination, in mechanism of the class described, with a reciprocating member having a flat face, of a holder, for parallel broaches, mounted for independent lateral movement on said face, and means automatirally to shift the position of said holder, each class described, with a reciprocating member having a flat face, of a holder, for parallel broaches, mounted on said face for movement laterally'thereon at right-angles to the recip- 4 rocating movement of said member, and means auton'iatically to move said holder, at right-angles to the movement of saidinember, each time the latter approaches either end of its travel, whereby said broaches are alternately positioned in the cutting field.

4. The combination, in mechanism of the class described, with a reciprocating member provided with transverse guide members, of a holder, for broaches adapted to cut alternately as said first-named member reciprocates, slidingly arranged between said guide members, and automatic means to cause said holder to be moved between said guide members each time said first-named member approaches either end of its travel.

5. The combination, in mechanism of the class described, with a reciprocating member provided with transverse guide members, of a holder, for broaches adapted to cut alternately as' said first-named member reciprocates, slidingly arranged between said guide members, automatic means to cause said holder to be moved between said guide members each time said first-named member approaches matic means to hold said .holder against movement between said guide members while each broach is making its cut.

6. The combination, in mechanism of the class described, with a reciprocating member provided with lateral upper, under, and intermediate guide bars, of a holder, for

broaches adapted to cut'alternately as said member reciprocates, in sliding engagement with said bars, and means to actuate said holder on said bars, first in one direction and then in the other direction, as said reciprocating member approaches the ends of its travel.

either end of its travel, and auto 7. The combination, in mechanism. of the class described, with a reciprocating member provided with lateralguide means, and members forming channels parallel with the path of said reciprocating member, and forming communicating passages between said channels at and adjacent to the ends thereof, of a holder, for broaches adapted to cut altern ately as said first-named member reciprocates, carried by said guide means, and having a part'adapted to engage said channeland passage-forming members and travel insaid channels and through said passages.

8. The combination, in mechanism of the class described, with a reciprocating member provided with lateral guide means, channeland passage-forming ribs, cam plates,

right having parallel ribs and provided at the top and bottom With cam plates and With a cam bar between said ribs and between said plates, said cam plates being in offset rela- 1,eee,140

tionship, and With said ribs and bar forming parallel channels Which communicate with each other above and below said bar of a holder, for broaches adapted to cut alternately as said member reciprocates, carried by said guide means, and provided wlt-h a bracket havin a aro'ect ion ada ted to travel in said channels and through the communicating passages, as said member reciprocates, and

thereby to move said holder laterally to position first one broach and then the other in the cutting field, and to hold said holder against lateral movement While either breach is passing through said field.

JULIAN L. PERKINS. I-IIRAM I). CROFT.