US2259424A - Automatic milling machine - Google Patents

Description

Oct. 14, `1941.

@UTOMATIC MILLING MACHINE Filed Dec. 2l, 1959 4 Sheets-Sheet l YBY Oct. 14, 1941. F. KocH AUTOMATIC MILLING MACHINE 4 Sheets-Sheet 2 Fiied Dec.-

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Oct. 14, 1941. F. KocH AUTOMATIC MILLING MACHINE Filed Dec. 2l, 1939 4 Sheets-Sheet 3 INVENToR @50506K Koch' .BY m ATTO NE? F. KocH 2,259,424 AUTOMATIC MILLING MACHINE Filed Dec. 2l, 1939 4 Sheets-Sheet 4 TOR y Oct. 14, 1941.

Patented Oct. 14, 1941 AUTOMATIC MILLING MACHINE 'Frederick Koch, Sparta, N. J., assig'nor to Associated Patentees, Inc., Ampere,

ration of New Jersey N. J., a corpo- Application December 21, 1939, Serial No. 310,321

19 Claims. (Cl. 90-13) The invention here disclosed relates to milling machines and is a continuation in part of Patent 2,202,210 of May 28, 1940.

Special objects of the present invention are to provide an automatic miller of the typey of said patent which may be readily set and adjusted for different more or less` complicated machining operations; which may be employed for many difficult unusual and complicated operations; which while normally fully automatic may be arbitrarily controlled, as for stopping and starting purposes at any time and which in general will be thoroughly practical and eiiicient.

The foregoing and other desirable objects are attained by novel features of construction, combinations and relations of parts as hereinafter specied, illustrated in the accompanying drawings and broadly covered inthe claims.

The drawings illustrate one of the commercial machines embodying the invention, but it will be appreciated from the scope of the claims that structure may be modied and changed in various ways all within the true intent of the invention.

Fig. l is a broken part sectional front View -of the upper portion of the machine.

Fig. 2 is a similar view of lower parts of the machine.

Fig. 3 is a broken sectional detail showing particularly the double cam mechanism ,foreperating the Worktable.

Fig. 4 is a broken plan View of the table movement controlling cam mechanism.

Fig. 5 is a broken plan and part sectional view of portions of the drive mechanism, as on substantially the plane of line 5 5 of Figfl.

Fig. 6 is an enlarged broken sectional detail of the special gearing for enabling arbitrary setting of the table operating cam as viewed from the right of the main shaft 52 in Fig.'5.

Fig. 7 is a broken vertical sectional View lof the cam means for imparting vertical movements to the spindle head, this view being taken on substantially the plane of line l-f'l` of Fig., 1.

Fig. 8 is a broken detail View of the throwout clutch and latch mechanism.

The machine illustrated embodies many of the features of the patent referred to, including a hollow cabinet type of base Il), providing a housing for the motorsand drive mechansm,a reciprocating wcrktable II, operated or controlled by cams specially designed to accomplish the exact table movements requisite for different operations and a cutter spindle I2, journalled in a head I3, vertically shiftable on a column I4.

Also, as in the patent identified, movement of the table in one direction is eiected by means of a weight I5, and flexible connection IE, running over guide rolls I'I, I8, to a point of connection with the table at I9. In Vthe present disclosure however, an extra or follow-up cam is provided to assure the full and complete table movement.

The table operating and controlling cams are shown at 20, 2|, Figs. 3 and 4, pinned at 22, in fixed relation on the upper end of shaft 23, in position to respectively engage the rolls 24, 25, on the divergent larms 26, 21, of the cam lever 28, pivoted on vertical axis 29, and carrying gear segment 3B, in mesh with the rack 3|, on the underside of the worktable or carriage.

The provision of separate edge cams is particularly desirable, since each can be designed to perform its particular function to best advantage and the combination of these with the gravity effected movement of the worktable is especially advantageous for climb milling and operations of that sort.

In Figs. 1 and2, a flat piece of work 32, is held for a climb milling cut in the work holder 33. It ywill be noted that the cutter I2, turns downward, instead of upward over the advancing work, tending to draw the work toward it and to assist in holding it in the clamp, instead of tending to pull it out of the clamp. Also that in this workl feeding movement, the table is advanced Iby the weight, with such advancing movement limited and controlled by the cam 20, which is cut to permit the exact movement desired at any or all points in this cutting control of the table. The cam 2I which cooperates with the follower 25, acts in the same direction, that is of the table movement, as the weight I5, but maybe so designed as to come into action only at or toward the end of the feed movement, thus to make sure that the table fully completes such feed movement even though permitted to advance to the cutter under gravity feed for the major portion of such movement.

Vertical movement of the cutter head is eff ected in the present machine by similar double cam mechanism. No weight however is required, such as used With the horizontal table feed, since the weight of the vertically moving cutter head is suiiicient to maintain a desired relation between the cam and follower in the lowering movement of the head.

Referring to Figs. 1 and 4, the cutter head I3,

, guided in ways 34, is shown as having a rack 35,

, adapted to receive a hand crank 10.

Y tively accomplish the desired cutter head movements, are removably secured in fixed relation on the shaft 45, journalled horizontally in a partition wall k46, in the hollow column I4. at the back of the partition carries the worm gear 41, in mesh with a worm 48, on vthe angularly. related horizontal shaft 49, and the latter is` driven through bevel gears 9, froma4 vertical shaft 5l, at the back of themachine extending from the cabinet portion of the base up into the hollow column, back of the partition. f

Both sets of cams, those for horizontal reciprocation of the table and those for vertical'mvement of the cutter head are maintained in properly timed relation by being driven from the same power. source, in this instance, the so-calledmain shaft 52, Fig.5, which is operated from a motor in the cabinet through change speed gearingindicated at 53. The shaft'52, is shown as extendingfrom front to rear and as carrying a worm 54, in mesh with a worm gear 55, on the lower end of thetable cam shaft 23, and as'carrying at the rear a spiral gear 66, in mesh with a correspondinggear 51, on a shaft 5 8, which through bevel gearing 59, is coupled in driving relation to vertical shaft 5l To enable the proper correlation of the two sets of cams; and the proper setting of the cams Y in respect to the table and the cutter head,- provision is made for uncoupling the worm drive shafts 52 `and 4,9, and for independently adjusting the same.

- Accordingly, 'the shaft 52., is split or sep,- erated et 6.0, ih two Sections with the forward. motor driven Section Carrying a sldhely .keyed movable clutch member 6|, and the rearward section 52a. carrying worm 54. provided vwith a Companion fixed clutch element 62 When thirl Clutch `is open as in Eig- 5. the rearward Worm Carrying section 52a, of the main shaft may be turned Oneway or thek other by means of a hand crank 6,3, removably engaged over the end o f ,o short cross shaftl $4, carrying a spiral gear Q5, in mesh with soireleeer 56, or1 Shaft 52a- Similarly, the upright shaft is Split at 61, with the lower Section carrying a Sliding keyed oloteh member 63, for engagement with e companion clutch element 69,'xed on the upper shaft VVsection and the worm Yshaft 49, hasan exposed end Thus when elotoh'tl. 69. is opened as by .means of a hand lever 1l, pivoted at 1,2, and connected with the sliding clutch element at 13, shaft v4.9, may be turned by crank 19, to set the cams 4|, 44;v in respect to the cutter head and also in relation to the worktable cams.

The cutter head is further independently vertically adjustablein the illustration, Fig. 1, by constructing said head as a unit adjustable withl respect to the rack 35,' and providing a screw shaft 14, having a` bearing the head at 15, and screw-threaded engagement with the rack at 18. Tol facilitate quick adjustment of ,this screw shaft, particularly whenfth'e upper end Of the shaft is below the top idf `the column as in Fig. 1,` an outwardly inclined adjusting shaft `'11',fis

showncorineclt'edat 'its lower end with the'screw This shaft, l

shaft by angle gearing 18, and having its upper end exposed to receive a hand crank 19.

To provide ready access to the cutter head operating cams at the front and the cam driving gearing at the back, removable doors may be provided at the front and back of the hollow column, over these parts substantially as indicated at 80,81, Fig. '7.

The clutch 61,52, on the main drive shaft, in addition to enabling the cam setting for the Work table, serves as in the patent rst identied, as a 'throw-out clutch for stopping operations of the machine jat the end of a predetermined cycle.

2.85# The opposite end of this spring is connected witha latch lever 86, pivoted at 81, and carrying a' latch nose 88, for holding engagement with a lug'89,ipr.ojectd downward from one side of the clutch fork 82. This one spring thus serves both to yieldingly support the latch lever in cooperating relation with the lug of the clutch yoke and to shift'the yoke in the clutch opening direction when the latch lever is tripped'from holding engagementwiththe lug.

VThe/latch'lever is 'automatically operated at the end of the cycle as in the patent application referred to 'by a projection or pin, such as indicated at 90, Von the worm gear 5.5., engaging the inclined orcam projection 9|, adjustably mounted on the end of the latch lever.

l Hand 'control of theV clutch 6l, 62, is provided in the illustration, by a handle 92, on the outer end `of o. shaft 1.9.3, Figs. 5 and 8, connected by rook'arrn .9!! and .link 9.5., with the arm 8.6. ofthe Shaft 83, on whioh'the yoke is pvotally supported, Said Shaft having e downwardly extended arm 31,.;ior ,pushing the yoke laterally ih a clutch closing direction and an angel-orly related arm @lt engaging .on opstanding portion .89, ofthe latch lever'for pushing the latter downwardly in a clutch releasing direction.

It will be clear from Fig. 8, that downward motion of the control handle, rocking shaft 93, in counterclockwise direction will have the eiect through the arm 91, o f pushing the sliding clutch member 6-I, into vcoupled engagement with Afixed clutch member 62, and that in such movement, the lug 89, Vof the clutch yoke will ride up over and engagebehind the shoulder ,88, of the Ylatch lever, the letter yielding through spring support 85, for such engagement ofperts.

To throw out the main clutch either for purposes of. 'setting the tablecarns or for stopping themachine at any time, the control handle is lifted, Fig. 8, thus to rock the shaft 93, in clockvisedirelo'torr ood this has the effect of ,depressihe .theoveretehdoe arm 91S. end thus through the Stud @Lto forge the .latch lever downward to-make it release the clutch yoke at 3.3, 89.. and permit the spring.8 5 to snap the movable clutch element out of engagement with the companion clutch element.

If idesired, a stop or stops may be provided whichfc'a'n be set to predetermine the limit of movement of either r both the horizontally travcling table or thevertically shiftable cutter head and whoh villthos llX the movement or movemente of 1 these parte .independently `of l possible which 'might .arise from `vveevrlhs of What is claimed is: A

l. In a milling machine, thecombination of a carriage mounted for travel in opposite directions, a pivotally mounted lever connected for operating said carriage, cam followers on said leverv at opposite-sides of the pivotal axis of said lever and in different positions longitudinally of said pivotal axis, a single cam shaft and separate edge cams on said shaft in line with and engaged on opposite sides by said cam followers, said edge cams designed respectively to control desired movement of said carriage in opposite directions.

2. In a milling machine, the combination of a carriage mounted for travel in opposite directions, a pivotally mounted lever connected for operating said carriage, cam followers on said lever at opposite sides of the pivotal axis of said lever and indifferent positions longitudinally of said pivotal axis, a single cam shaft and separate edge cams on said shaft in line with and engaged on opposite sides by said cam followers, said edge cams designed respectively to control desired movement of said carriage-in opposite directions, a power source and drive connections from said power source to said cam shaft `including a disconnecting clutch and means for arbitrarily setting said cam shaft in different angular relations when said clutch is disconnected.

3. In a milling machine, the combination of a carriage mounted for travelin opposite directions,a pivotally mounted lever connected for operating said carriage, cam followers on said lever at opposite sides of the pivotal axis of said lever and in different positions longitudinally of said pivotal axis, a single cam shaft and separate edge cams on said shaft in line with and engaged on opposite sides by said cam followers, said edge cams designed respectively to control desired movement of said carriage in opposite directions and means for operating said cam shaft including a power shaft, a disconnecting clutch, worm and gear drive to said cam shaft and means for turning said Worm and gear drive independently of said power shaft.

' 4. In a milling machine, the combination of a carriage mounted for travel in opposite directions, a pivotally mounted lever connected for operating said carriage, cam followers on said lever a't opposite sides of the pivotal axis of said lever and in different positions longitudinally of said pivotal axis, a single cam shaft and separate edge cams on said shaft in line with and engaged on opposite sides by said cam followers, said edge cams designed respectively to control desired movement of said carriage in opposite directions, said carriage being mounted for vertical movement and a horizontal cutter spindle mounted on said carriage.

1n a milling machine, the combination of a carriage mounted for travel in opposite directions, a pivotally mounted lever connected for operating said carriage, cam followers on. said lever at opposite sides of the pivotal axis of said lever and in different positions longitudinally of said pivotal axis, a single cam shaft and separate edge cams on said shaft in line with and engaged on opposite sides by said com followers. said edge cams designed respectively to control desired movement of said carriage in opposite directions, said carriage being mounted for vertical movement and a horizontal cutter spindle mounted on said carriage and means for effecting vertical adjustments of said cutter spindle on said carriage independently of the vertical shifting movements of said carriage.

6. In a milling machine, the combination of a carriage mounted for travel in opposite directions, a pivotally mounted lever connected for operating said carriage, cam followers on said lever at opposite sides of the pivotal axis of said lever and in different vpositions 'longitudinally of said pivotal axis, a single cam shaft and separate edge cams on said shaft in line with and engaged on opposite sides by said camA followers, said edge cams designed respectively to control desired movement of said carriageV in opposite directions, said carriage being mounted for horizontal travel and a weight connected with said carriage for imparting motion to the same in one direction.

`'7. In a milling machine, the combination of a carriage mounted for travel in opposite directions, a pivotally mounted lever connected for operating said carriage, cam followers on said lever at opposite sidesof the pivotal axis of said lever and in different vpositions longitudinally of said pivotal axis, a single cam shaft and separate edge cams on said shaft in line with and engaged on opposite sides by said cam followers, said edge cams designed respectively to control desired movement of said carriage in opposite directions, a hollow column supporting said carriage for vertical movement at one side of the same, a supporting partition in said hollow column, said shaft being journalled in said partition with said cams at one side of said partition and drive means for said shaft at the opposite side of said partition.

8. In a milling machine, the combination of a carriage mounted for travel in opposite directions, a pivotally mounted lever connected for operating said carriage, cam followers on said lever at opposite sides of the pivotal axis of said lever and in different positions longitudinally of said pivotal axis, a single cam shaft and separate edge cams on said shaft in line with and engaged on opposite sides by said cam followers, said edge cams designed respectively to control desired movement of said carriage in opposite directions, a hollow column supporting said carriage for vertical movement at one side of the same, a supporting partition in said hollow column, said shaft being journalled in said partition with said cams at one side of said partition, drive means for said shaft at the opposite side of said partition and including a worm gear on the shaft, a worm in engagement with said worm gear, power means for turning said worm and manually operable means for turning said worm independently of said power means. o

9. In a milling machine, the combination of a carriage mounted for travel in opposite directions, a pivotally mounted lever connected for operating said carriage, cam ,followers on said lever at opposite sides of the pivotal axis of said lever and in different positions longitudinally of said pivotal axis, a single cam shaft and separate edge cams on said shaft in line with and engaged on opposite sides by said cam followers, said edge cams de signed respectively to control desired movement of said carriage in opposite directions, said lever having a gear segment, a rack engaged thereby and means adjustably connecting said rack with said carriage,

l0. In a milling machine, the combination of a carriage mounted for travel in opposite directions, a pivotally mounted lever connected for operating said carriage, cam followers `on said lever at opposite sides of the pivotal axis of said lever and in different positions longitudinally of said pivotal axis, a single cam shaft. andseparate edge cams on said shaft in line with andengaged on opposite sides by said earn followers, said Vedge cams designed respectively to control desired movement of said carriage in opposite directions, a column supporting Vsaid carriage for vertical movement, said cam shaftberig. journalled onV said .column in horizontal position, a worm gear on said cam shaft, a horizontally .disposed shaft, a Worin on said latter shaft in engagement with said .worm gear, means for effecting hand Vadjustment of said worm shaft, a vertically extending shaft in driving connection withsaidiwormshaft and a disconnecting clutch. on `said vertical shafti1. In a milling machine, the combination of a horizontally reciprocating worlctalcleand a vertically reciprocating cutter head and common drive connections to said horizontally reciprocating Worktalole and vertically reciprocating cutter head, including disconnecting clutches for uncoupiing either the horizontally reciprocating worktable or the vertically reciprocating cutter head from said comin-on drive connections .and means for .effecting separate .independent driving adjustments for saidworktable and cutter head when said clutches are. uncouplcd .and comprising hand operated mechanism Afor Yshifting .said worktalole horizontally todiiierent positions and hand operated mechanism ior` .shifting said cutter head vertically to different positions V1.2. In a milling machine, the combination of a Worlstalole .and a cutter head mounted for rccic-rooation in angularly .related planes and coinmon drive means for effecting reciprocation of said Wcrktable and cutter head in .said Planes, .inl cluding means for effecting the coupling of said worktable and cutter head in different 'relations and Comprising a main drive shaft for effecting operationof the worktable, a. clutch on said main drive shaft for uncoupling the worlrtable, hand mechanism for shifting the worktable when so uncoupled-driveshafting from said main drive shaft to said reciprocating cutter head, a clutch interposed in said drive shafting for uncoupling said cutter head and handmechanis'm for shifting said cutter head when so uncoupled.

13: Ina milling machine, the combination vof a horizontally reciprocating worktable and a vertically reciprocating cutter head, .a vertically extending shaft, cam means on said shaft lfor effe'cting reciprocation of the worlstable, ahorizcntally extending power shaft, worm- Agear-im; between said power shaft and cam shaft, a, horizoritally extending cam shaft, cam means on said shaft for effecting vertical reciprocation of the cutter head and drive shafting from said power shaft to said horizontal cam shaft.

` 14. In a milling machine,v the combination of a horizontally reciprocating worlrtable and a vertif cally reciprocating cutter head, a vertically eX- tending shaft, cam means on 4saidshaft for effecting reciprocation of the worktabla a horizontally extending power shaft, worm gearing lbetween said power shaftand cam shaft, ahorizontally extending cam shaft, cam means on said shaft for effecting vertical reciprocation of the cutter head and drive shafting from said power shaft to said horizontal cam shaft, including a disconnecting clutch and means for effecting ad-v justments of said horizontal cam shaft independently of said power shaft and vertical cam shaft.-

15. In a milling machine, the combinationof a horizontally reciprocating worlrtalcle. and a vertically-reciprocating cutter headfa vertically cX- tending shaft, cern means onV said shaft .for eifccting recirrocation .of the Worktablc, a heri-` zontally extending power shaft, wol-1n gearing. be:

carriage mounted for travel in opposite directions,

a cam shaft, two edge cams on said cam shaft, lever Aarms divcrgcntfroni .a cominoncenter and cooperatively related with the respective edge cams at opposite sides of said cams and whereby said lever arms will loev oscillated in opposite di-l rections by Saidedge cams and actuating connections from said lever .arms to said carriage for reciprocating the latter in opposite directions. n i7. 'In a milling machine,l the combination of a carriage mounted Vfortravel in opposite direc'- tions, a cam shaft, twoedge cams on said Ycam shaft, lever arms divergent from a'cominon center and cooperatively related with the respective edge cams at opposite sides of Vs'aidcams and whereby said lever arms'will be voscillated in opposite directions by said edge cams, actuating connections from said lever armsto said carriage for reciproeating the latter in opposite directions 'andv yielding means for imparting travel to said carriage in onel direction independently of the travel imparted thereto in the same direction by one of said cams(V H 18. In a milling'machine, the combination of a carriage mounted for travel in vopposite directions,

a pivotallyv mountedlever connected for oper-V ating said carriage, Ycam followers on said lever atopposite sides of the pivotal axis of said lever and in different positions longitudinally4 of said pivotal axis, a single cam shaft and separate edge horizontally reciprocating worktable 'and a vertically reciprocating cutter head, a main drive shaft having a split portion,.a clutch lfor effect'ing the coupling and uncoupling of the split portion of said drive shaft, operating connections from the clutch controlled split portion of said drive shaft Ito said horizontally reciprocating worktable, a hand shaft foreffecting operation of the split portion of said drive shaft when said clutch is uncoupled and drive connections from said split portion of the drive shaft to the vertically reciprocating cutter head and including shafting, a clutch interposed in said shafting and hand means for effecting rotation of a portion of said shafting when saidlast mentioned clutch is uncoupled.

' FREDERICK KOCH.

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