Патент USA US2410026код для вставки
- Oct. “29, 1946. w. F. GROENE ETAL 2,410,026 AUTOMATIC LATHE Filed Feb. 10, 1943 11 Sheets-Sheet l $w\ 0‘.@ mm“! .. .‘ _. Ed“.PP.“ 3/o5r3.. m$\RKH HIE INVENTORS. W\LL\F\M F. GROENE Eh MP.“ ATTORNEY; 06L 29, 1946- - w. F. GRQENE ETAL ' " 2,410,026 ‘ AUTOMATIC ‘LATHE Filed Feb‘. 10,‘ 1943 ' . E ‘ - > '11 Sheets-Sheet 2 _ INVENTORS. ' . BY QM \MLUAM F. GRGENE m RY cxemrek ‘ ' ATTORNEY. Qct- 29, 1946- _w. F. GROENE v|-:'r AL - 2,410,026 AUTOMATIC LATHE Filed Feb. 10, 1943 ; . . ‘ ll Sheets-Sheet 3 . ‘WILLIAM F. GROENE BY ‘ i ‘HARRY C.KEMPER Oct 29,1946. w. F. GROENE ET AL ' 2,410,026 AUTOMATIC LATHE Filed Feb. 10, 1945 I 11 Sheets-Sheet 4 INVENTORS. . BY ‘ WlLLlAMEGROENE HARRY C..KEMPER NT'YORHEY. 06L 29, 1946- w. F. GROENE ET AL 2,410,026 AUTOMATI C LATHE Filed Feb. 10, 1945 ll Sheets-Sheet 5 . - \\\\\\\\\m“ \“ ‘ _"se \\\\\ I a INVENTORS. wlLum EGROEHE ' “may 0. KEMPER ' MTDRNEY. OCt- 29, 1946- T w. F. GROENE ETAL 2,410,026 AUTOMATIC LATHE Filed Feb. 10, 1943 r 11 Sheets-Sheet e WILL-MM F. GROENE Oct 29, 1946- w. F. GROENE ET AL ‘ 2,410,025 AUTOMATIC LATHE Filed Feb. 10, 1943 ll Sheets-Sheet 7 11 151 . ' Y E , BY HARRY C.\<EMFER QM é. AT TORNEY" Get 29, 1946. w. F. GROENE ET AL 2,410,026 AUTOMATIC LATHE Filed Feb. 10, 1943 11 Sheets-Sheet 8 INVENTORS. WILLIAM F. GROIENE umzrq c. KEMPER AT T ORNEY.. Oct 29, 1945_ A_ w. F. GROENE ET AL ~ 2,410,025 AUTOMATIC LATHE Filed Feb. 10, 1943 11 Sheets-Sheet r9 INVENTORS. MHLLIAM F. GROENE ~' HARRY C.KEMPER' ATTORNEY. Oct. 29, 1946° ' W.‘F_'GROENE ETAL AUTOMATIC LATHE Filed Feb. 10, i943 2,410,026 ‘ ‘ 11 Sheets-Sheet 10 Pram" >1NVENTOR5 wmum F. GROENE BY ARRY c. KEMPER mm“ 3 M ' ATTORNEY.’ ‘ ‘ ~ Oct- 29, 1946. W..F. GROENE ET AL 2,410,026 AUTOMATIC LATHE Filed Feb. 10, 1945 1ss-b ~ _ ‘ ‘ ‘ FE; - 21H ll Sheets-Sheet ll ' 4483 INVENTORS. BY- “egg? 522x59: 99 I .g ' ATTORNEMY. ~ Patented Oct. 29, '1 946 2,410,026 ~ UNITED STATES PATENT OFFICE‘ AUTOMATIC LATHE William F. Groene, Cincinnati, and Harry G. Kemper, Goshen ,Township, Clermont County, Ohio, assignors to The R. K. Le Blond Machine Tool Company, Cincinnati, Ohio, a corporation of Delaware Application February 10, 1943, Serial No. 475,342 2 Claims. (Cl. 82_—-21) 1 This invention pertains to automatic lathes and is particularly related to the transmission and control mechanism for such type of lathes. Pri marily the purpose of this invention is to provide 2 Further features and advantages of this inven tion will appear from the detailed description ,of the drawings in which: ‘ Figure I is a front elevation of the automatic an automatic lathe of completely universal char- ; acter ‘capable of doing any type or class of work possible to be machined onsuch a lathe. It is lathe of this invention showing the general ar rangement of the base, headstock, tailstock, and overhead too1 slide. also the intent to provide in an automatic lathe a ‘ , Figure II is a rear elevation of the automatic complete range of speeds and feeds for any type lathe shown in Figure I. of material it is desired to machine. "10 Figure III is a left hand end elevation of the Another object of this invention is to provide a lathe shown in Figures I and II. i simpli?ed, compact and e?icient feed and rapid Figure IV is an enlarged fragmentary view traverse drive transmission for actuating the cut partly in section of the headstock, control mech ting tools to and from the work piece mounted anism, and feed cams for the tool slides shown in the lathe. on the line IV—~IV of Figures V and VI. It is also a further object to provide, in con Figure V is an enlarged fragmentary transverse junction with this feed and rapid traverse mech section through the lathe headstock and bed on anism, a load-and-?re trip mechanism for al the line V—-V of Figures 1, IV, and VII, particu ternately engaging the feed and rapid traverse larly showing the‘ belt drive transmission to the work spindle and the spindle stop trip mechanism. motion at the appropriate time in the cutting cycle of the machine; 1 Figure VI is an enlarged fragmentary trans verse section through the lathe headstock on the Another important featureof this invention is to provide aseries of tool carrying bars upon line VI-VI of Figures IV and VII, particularly showing the feed and rapid traverse drive and which are mounted the tool holders or slides car rying the cutting tools so that onelbar extending longitudinally of the lathe spindle axis is located directly below said spindle axis for carrying the turning tools. The second bar is also provided immediately under and directly below the work spindle ,and- ?rst mentioned bar for carrying the control mechanism. ‘ ‘I i _ Figure VII is a diagrammatic section through the transmission mechanism of the lathe head stock, particularly showing the headstock jdriving transmission comprising the gear drive and belt facing tools. The result of this unique arrange 30 drive mechanism for rotating the work spindle together with the power takeoff mechanism for ment is to provide much greater clearance room the feed and rapid traverse movement to the tool for the chips cut from the work piece in the lathe slide, shown on the line VII—-VII ‘of Figures V and at the same time provide much greater ac and VI. , ‘ cessibility to both the work and tools of the ma 35 Figure VIII is an enlarged transverse sectional chine” . , view through the lathe, on the line VIII-VIII of A further object is to provide in this arrange Figures I and II, particularly showing the facing ment of .tool bars extending longitudinal of the tool on the lower tool bar and the turning tools .axis of the lathe, one above the other with the on the upper tool bar of the lathe, together with 1 upper bar mounting the turning tool and the lower 40 the cam actuating mechanism for feeding said ‘,b'ar directly beneath it mounting the facing too1 tools relative to the work spindle, the tailstock for ;feeding devices, means whereby either the front the lathe being shown in the background. ,or rear tools may be alternately or simultane Figure IX is a fragmentary enlarged rear ele iously utilized for either turning or facing opera :tions. 45 vation of the universal tool slide'mounted on the overhead tool barishown by the line IX——IX in In conjunction Withsuch tool feeding mecha Figures III, XI, and XII, particularly illustrating ;nism mounted on the bars, one above the other, the cam actuating mechanism having the con applicants propose to utilize a_ unique cam actuat stant feed to depth and dwell position for any ingmechanism whereby the tools may be brought , automatically to a de?nite predetermined depth 50 position of adjustment of» rate of feed. of cutand dwell while at the same time cam feed Figure X is an enlarged fragmentary front ele ingmechanism is fully adjustable to effect any vation of the universal tool'slide on the overhead desired‘ rate of feed while at all times retaining too1 carrier shown by the line X--X in Figures ‘the accurate depth of cut and dwell above men tioned.‘ i i > i a III, XI, and XII. 55 - . . Figure X1 is a left hand end elevation partly 2,410,026 3 in section on the line XI—XI of Figures I, II, IX, and X. Figure XII is a plan view of the universal tool 4 and 31 are in engagement the gear 31 also en Figure XIII is a vertical section on the line gages the gear 40 ?xed on the work spindle 6. When the gear 37—38 is shifted to the right on the shaft 39 the gear 38 engages the large face gear 4| ?xed on the work spindle 6. In this way two changes of gear drivespeeds may be effected XIII-XIII of Figures II and IV, particularly‘ showing the feed and rapid traverse clutch shaft. in the work spindle 6. Thus by this arrangement the work spindle may be driven directly by belts slide shown on the line XII—X[I of Figures III, IX, and X. vfor the higher smoother speeds required or a gear Figure XIV is an enlarged detail view of the cam controlling the rate of feed and dwell for 10 drive having two selections of speed‘ may also be’ ‘ obtained when the gear 3'f—38 is shifted to'the the various cutting tool slides. position where gear 31 engages gear 35 of shaft Figure XV is a view‘ of the pinion shaft for 124 and gear 40 of the work spindle, or when its setting the cam slides. gear 31 engages the gear 36 of the shaft 24 and The lathe comprises a ‘base "I upon which .is its gear .38, engages the face gear 4| on the work‘ rigidly [mounted a headstock 2 and the tailstock spindle. 3. The work is held in the lathe 0n the centers ‘In this transmission arrangement it Will be 4 and 5 carried respectively in the headstock work noted that there are two compartments in the spindle 3 and the tailstock barrel 1. lathe headstock, namely the lubricant ?lled com Referring particularly to Figures III and VII the work spindle 6 which carries a suitable chuck 20 partment 42 which provides lubricant for the ing device or work arbor vfor driving the work in gear transmission mechanism and the dryicom addition to the center is driven from the main partment 43 which contains no ‘lubricant and contains the belt drive transmission as shown best in Figures V and VII. A suitable lubricant drive motor 8v which is connected through suitable belts 9 to the clutch and brake pulley 10 which incorporates a driving clutch l l and brake device 25 tight ba?ie 44, Figure V, is provided in the bottom l2 which may be actuatedv by reciprocating the actuating rod I3 by moving the spool M which engages the actuating ?ngers I5 in a conven tional manner, for example, as shown in Patent of the dry compartment 43 so ‘as vto prevent any lubricant getting into the belt drive‘ transmission and impairing its efficiency. Another unique fea ture of this design lies in the fact that the work #1,474,-112,~dated November 13, 11923’. Thus main 30 spindle 6 need not be removed from its journal drive power from ‘the motor =8 and the pulley It) may be connected to the input drive shaft l6 through the friction ‘clutch H or may be discon bearings 45 and 49 when it becomes necessary to replace the belts '26. This is accomplished by providing the rear mounting bearing 4'! of the work spindle in a cartridge case 48 which may be nected from the shaft Is \by this clutch and the shaft I6 and associated headstock transmission 35 entered into a bore 49 in the headstock housing 2 and held in place by suitable screws 59. When it is desired to change the belts z?the‘screws 50 On :the shaft 16 is ?xed the gear I‘! which is arranged in driving relationship with the gear are removed ‘and the cartridge case 48 and the lock nut 5| removed from the work spindle. The 48 ?xed on the shaft l9 appropriately jo-urnaled in the headstock housing '2. The outer right hand 40 clearance thus provided between the bore 49 and the work spindle is just sufficient to ‘permit easy ‘end-of the shaft [9 extends into a change gear ‘compartment 29 and 'has mounted on it a gear removal or ‘insertion of the ‘belts through this opening and around vthe ‘work spindle 6 so that v2| ‘which ‘may drive the pulley shaft 22 when a they may then be easily slipped over the ‘pulley changegear 23 is inserted on the outer end of 25 and the idler pulley 28. The cartridge case this shaft 22 which meshes with the gear 2-! on the shaft 49. Or the‘gear 23 may beremoved 48 is then reinserted in the bore 49 ‘and fastened in placeby the screws 50 to thus provide a totally and placed on the‘shaft .24 .so that driving power enclosed integral headstock containing a ‘lubri 'from'th'eshaft .l 9 .may then ‘be transmitted from cant ?lled gear drive transmission compartment the gear :21 to the gear 23 on shaft 24 to effect and a dry belt drive compartment in the same the'geardrive to the work spindle. head housing. This arrangement, of course, pro When belt driving of the lathe spindle .6 is to vides the utmost simplicity and efficiency inlman be ,done, :the gear :23 is placed on the shaft 22 ufacturing of a lathe headstock incorporating whereby driving power from the main drive motor such features. ' 8 is transmitted to this shaft and to its pulley 25 Power for actuating the cutting tools at feed which is connected through the belts '26 to a gearingstop-ped rapidly by means of the brake l2. pulley 21 fixed to the work spindlev 6 and which belts may be vkept in proper tension, Figure V, by vmeans of the eccentric idler adjusting means comprising a pulley 28 mounted on suitable bear ings 29 and carried on an eccentric bushing 30 fixedtoan actuating stud ‘3i which'has a squared end portion 3.2 for application of ‘a wrench for rotating the stud ,3I to effect adjustment and tension in the belts '26. A‘ suitable lock nut 33 is and rapid traverse motion is derived from the headstock transmission. Referring particularly to Figure VII, on the shaft i9 is ?xed a gear 52 which drives the gear 53 rotatably journaled on the shaft I ,6 and which has formed on a sleeve projecting portion thereof a spiral gear ‘54 and a second spiral gear 55 ?xed to the other end of the sleeve of the gear 53. The spiral gear 55 drives a mating spiral gear 59 carried on a shaft provided for locking the stud :3! in the desired 65 51 appropriately journaled in the headstock housing ,2. "This shaft '51 proceeds backwardly .to POSi’QiQIA. the rear of the headstockinto a change gear com When gear driving’ of the work spindle 9 is to partment 58, Figures II and where it has be undertaken, gear 23 is placed on the end of mounted on it a change gear 59 which meshes the shaft 24 in the compartment 29 whereby the shaft 24 is. rotated and the double gear 34?xed 70 with another change gear ‘6.9 in this same com partment '58 mounted on the shaft .61 appropri thereon and having the gear portions 35 and 3.9 ately journaled in the lower rearward portion of will thus bedriven. The gear 35 may be engaged by'the gear 31 when the shiftable gear comprising the headstock housing 2, Also on this shaft jour naled against axial movement is the spiral gear the gears 31 and 38 is moved to the left on the 62 which meshes with the spiral gear 54‘of the shaft 39 while at'the same time when gears 35 2,410,026 5 ‘gear 53 above mentioned. Thus by this arrange automatically tripped to stop the spindle at a ment the shaft 6| may be driven at a plurality of predetermined point in the work cycle from the diiferent relatively slow speeds or‘ feeding speeds rotation of the cam drum shaft 'I'I as‘follows: by changing the change gears 59 and 69 in the Noting Figure V, on the pin 9| and in the cut compartment 58 for effecting different rates of 5 away portion 95 formed in the lever 99 is mounted the lever 96 which has an upward projecting lug relativevfeed for the tools of the machine. The 91 having a surface 98 engaging the surface 99 spiral gear 62 rotatably mounted on the shaft 6I is driven at a relatively rapid rate by its mating of the lever piece 99 but which is free to rotate, spiral gear 64 so as to e?ect rapid traverse mo as seen in Figure IV, in a counterclockwise direc tion. In order to selectively take off either the feed drive power from the shaft 6| or rapid trav erse driving power from the spiral gear 62 the ar_ rangement shown in Figures VI and-XIII is pro vided which comprises a clutch member163 ?xed tion without effecting rotation of‘ the lever 99. Rocking the lever 96 clockwise actuates the lever 99 and therefore the control lever 86 to the stop and brake position‘of the clutch I I—I2. A suit able compression spring I99 carried on an eye by suitable pins '64 to the shaft M and having 15 ' bolt I9I and abutting against the nut I92‘ en gaging the surface I93 of the headstock housing clutch teeth 65 which are arranged to engage 2 and is connected by means of the pin I94 to the mating clutch teeth 66 of the output gear 61. lower end of the lever 96 so as to normally urge This output gear 6'! is journaled on the shaft BI this lever 96 in the clockwise or stop and clutch and has clutch teeth 68 which are arranged'to engage clutch teeth 69 formed on the gear 62. 20 disengaging position. Also on the lower end of this lever 96 is a latch piece I95 which is adapted . Thus by shifting the gear 61 so as to engage the to be engaged by a mating latch piece I96 ?xed clutch teeth v66 with the teeth 66 of the clutch on a lever I9‘! ?xed on the rock shaft I98 jour member 63 this gear 6‘! will be rotated at feeding naled in the headstock housing 2. Also ?xed on speed. Shifting this gear 61 to the left, Figure the left hand end of this rock shaft I98, Figure VI, will engage the clutch teeth 69 with the clutch IV, is the roller arm I99 carrying a roller III] teeth 69 of the. gear 62 so as to connect rapid which may be engaged by a dog I I I appropriately traverse power for rapidly rotating the gear 61. clamped by a suitable screw II2 on the shaft ‘I1. This gear 61 is in constant mesh for any shifted Normally this arm I99 and lever I91 are moved position with the idler gear 19 appropriately jour naled on a suitable stud 19a in the headstock 30 so as to constantly be urged toward the‘ latch piece I95 of lever 96 so that when the lever 86 is housing, 2. This gear ‘I9 may be connected to or moved to the position 8619 compressing the spring disconnected from driving relationship With the I99 it will automatically be latched by the piece worm shaft ‘II by means of a pinion ‘I2 slidably I95 engaging about the piece I96 so as to hold but drivably mounted on the shaft ‘II by any this lever in the run position for the work spin suitable splined connection and may be slid on dle. As the cam drum thus rotates through the this splined arrangement by means of the control transmission gearing to the worm ‘I6 on the shaft rod ‘I3 having an operating knob ‘I4 projecting ‘H as already described the dog III will rotate through the front of the base I of the lathe as around and ultimately strike the roller II9 on best seen in Figure VI. This worm shaft .‘II has ?xed on it a worm ‘I6 which in turn drives a 40 the lever I99 at the appropriate time in the cut ting cycle as determined by the setting of the worm wheel ‘I6 ?xed on the cam drum shaft 11 appropriately journaled in suitable bearings ‘I8 and ‘I9 in the base I‘of the machine, A suitable crank handle not shown may be placed on the clutch portion 89 of the worm shaft when the knob ‘I9 is pushed in against the base I of the machine as shown in Figure VI so as to rotate the shaft ‘II manually for effecting manual posi tioning of the tools for setting the work and tools prior to the automatic machining cycle. On the cam drum shaft ‘II are appropriately mounted the cam drums SI and 82 having appropriate cam slots 84 and 85 for actuating the various tool slides in their desired movement. Referring particularly to Figures IV, VI, and VII, the control of the clutch II on the input drive‘ shaft “I6 is accomplished by means of the main spindle stop and start lever 66 which is ?xed to an appropriate sleeve 91 journaled in the headstock housing 2 and having ?xed on its inner end a depending lever 88 which is connected‘ by means of a link 89 with another lever 99, Figure V, pivotally mounted on a pin 9I ?xed in the headstock housing 2 and having a yoked portion 93 carrying a shoe 94 which might be ?tted in the annular groove 95 of the operating spool I4, Figure VII, of the clutch II. Thus by moving the lever from its position 86a, Figure IV, to the position 861) the clutch spool I4 will be moved to the left in Figure VII to engage the clutch II; likewise moving the lever in the opposite direction will disengage the clutch I I and engage the brake dog III by means of its adjusting screw II2 on the shaft TI. Thus when the dog I I I does hit the roller III! the spindle stop lever will be tripped to the stop position since the member I96 will be pulled away from the member I95 by this ac tuation of the lever I99 allowing the spring I99 to turn the lever 86 to the stop position 9611. It will be also noted that since the surface 98 en gages the surface 99 of the lever 99 only from the clockwise direction of movement that even though the lever 96 is latched behind the latch piece I96 of lever I9‘I during the automatic cycle the stop lever 86 could at any time be moved back from position 8% to 86a manually to immediate ly arrest the work spindle rotation in the event of an accident or any other incorrect operation of the machine. The gears 3"I—38 on the shaft 39 may be shifted axially on this shaft for effecting the two» ranges of gear driving of the work spindle 6v by means of-the control lever II3 located on the front of the headstock as shown in Figure IV. This lever H3 is ?xed on the rock shaft II4 which passes co-axially through the sleeve 8'! of the lever 86 and has on its inner end a shifter lever I I5 car rying a shifter shoe I I6 which engages in the an nular groove II1 formed in this gear 3'I-—38, so that rocking of the lever from the position “341 to the position II 3b effects shifting of the gear to its true driving position as described above. Feed and rapid traverse power may be alter nately applied to the cutting tool of the lathe I21 for rapidly bringing the work spindle 6 to a automatically at a predetermined position of the This operating handle and clutch' II may be 75 cutting cycle of ‘the machine.‘ Thisautomaticl stop. , . . , ' ‘ .. ' 2,410,026 7 8 control of the feed and rapid traverse movement marily for the purpose of accurately positioning the various levers I28 and I29 with respect to the is effected from the rotation of the cam drum shaft 'I'I. Referring particularly to Figures vIV, V, and _VI it will be noted that the clutch gear 61, Figure VI, has an annular groove I I8 in which clutch gear 61 so as to provide the proper degree of accuracy of movement of all of these members 5 during the automatic operating cycle of the ma is mounted avshoe I I9 which is carried by a yoke chine. Referring particularly to Figures I and VIII it will benoted that extending longitudinally of the I20 ?xed to the rock shaft IZI journaled in the headstock 2 of the lathe. On this rock shaft I2I is mounted a downwardly depending link I22 which has a projecting pin I 23 which may be en gaged by the screws I24 and I25 of the fork .shaped lever I26 ?xed on the rock shaft I2‘I journaled in the headstock housing 2. This rock base of the lathe is the upper tool supporting bar 10 I44 and the lower tool supporting bar I45 both located with their axes substantially in a vertical plane passing through the work spindle axis I46 of the lathe. In this particular exemplary dis closure the'bar I44 is journaled for sliding and ’ shaft I2‘! proceeds to the left, Figure IV, and has ?xed on its outer end a pair of levers I28 and I29 15 rocking motion in appropriate bearings I47 and each with rollers I33 and I 3I respectively. The arm I28 having the roller I39 is engaged and rop erated so as to rotate the rock shaft I21 in a clockwise direction by the trip dog I32 while the lever I29 has its roller I3I engaged by trip dog _ I 33 which rotates the rock shaft I2‘! in a counter clockwise direction, as seen in Figure V. Both of these dogs I 32 and I33 are respectively clamped at their desired circumferentially oriented posi I48 in the base I of the lathe as best shown in Figure VII and is similarly supported in appro priate bearings I49 in the tailstock 3. The lower tool bar I45 is supported in bearings I50 and I5I in the base I of the lathe and is permitted to rotate in, said bearings but is restricted from, axial sliding motion in this particular instance v by appropriate collars I52 and I53 clamped to the bar I45. It will be noted that this arrangement tion on the cam drum shaft ‘IT by suitable clamp 25 of the bars I44 and I45 one above the other and ing screws I34 and I35 respectively. It will thus lying substantially in a vertical plane passing be seen that as the cam. drum shaft 'I'I rotates the through the axis of rotation of the work spindle dog I32 will strike the roller I30 so as to cause that there is no obstruction on either side of this the rapid traverse motion to take place by en central vertical grouping of the bars I44 and I45 gaging the clutch teeth 58-459 whereas the shift 30 so that chips cut from the work piece mounted er I33 when it engages the roller I3I and lever on the work spindle axis have free access to drop I29 the feed clutch 65—66 will be engaged to down past these bars into a relatively wide chip effect the feeding motion in the cam drum shaft collecting compartment in the base I comprising and tool slide of the lathe. the vertical longitudinally extending rear por In order that the transition from feed to rapid 35 tions Ia and Ib forming the compartment I c traverse or from rapid traverse to feed may take place by snap action motion so that at no time shall the cam drum shaft ‘ll get to a neutral posi tion and therefore stop the entire operation of the machine, a special arrangement is provided for flipping the clutch gear 61 from one position to the other. This comprises leaving a substan tial space for lost motion between the shoe III! and the annular slot H8 in the gear 61 and in providing a lever arm I36 having a pin I3'I which is carried ?xedly to the shaft I2I so as to rock or swing with the motion of the shaft I2I. A detent lever I38 having a detent point I39 and pivotally mounted about the shaft I2‘! is normally urged into yieldable position against the pin I3‘! through which the chips readily drop into the pan I54 below the base I of the machine. Also since there are no obstructions from these bars far removed from the vertical plane passing through the axis of the Work spindle, the operator is not. interfered with in reaching to the tools and working from either side of the machine to thus make apractical machine operation in a line-up where one operator would operate a plurality of. ; machines and be required to operate the machine from either side. Also adequate chip space is thus provided which is a very important feature of a lathe of this automatic type whichproduces chips at a very rapid rate during its rapid production of work pieces. ' by means‘ of the tension spring I44] attached to The upper bar I44, while free to rotate, is also given axial sliding motion by means of the actu the lever I38 and to a pin IIII ?xed in the head ating block I55, shown best in Figures VI and VII, stock housing 2. The point I39 of the detent which has a slotted portion I56 in which nicely lever I38 is so arranged that as the shaft I2I is rocked to cause disengagement of the clutch gear 55 ?ts a collar I 51 ?xed on the bar I44 by a suitable 61 with either of its respective clutches, that the pin I58 so as to permit the bar I 44 to rotate in lost motion between the shoe I I9 and the slot I I3 the bearings I41 and I48 of the headstock and permits the pin I731 to ride a little beyond the also in the tailstock bearings. In this way the block I55 accurately controls the axial move point I39 in the direction it is moving so that just as the shoe II9 begins topengage the other 60 ment of the bar I 44. The actuating block I 55 side of the slot III3 for removing or disengaging has a bore I59 which nicely ?ts over the lower the clutch the remainder of the motion will take bar I45 and slides thereon so as to support the block I55 against swinging about the bar I44. place due to the sliding of the pin I31 down the surfaces I42 or I43 each side of the point I39 in a On the lower end of this block I55 is a cam roller snap action fashion so that the clutch will then I50 carried on a pin IBI ?xed in the block I55 be moved immediately to disengage one clutch or and which roller I39 may engage in a cam track immediately engages .the other series of clutches 84 ‘on the cam drum 8I so that rotation of the so that at no time is there a position where the clutch gear 61 is in a neutral or no clutch engaged position. This is essential in order that the cam drums on the shaft 1-‘! at all times be rotating in either rapid traverse or feed so that ‘the trip dogs III, I33, and I32 may at all times be moved to effect control of the levers I09, I29, and I123, The said screws I24 and I25 in’ the lever I26 are pri drum BI on the shaft 11, through the mecha nism described, will cause axial displacement of the member I55 along the lower bar I45 and to thus‘ cause axial motion in the upper bar I44 through the medium of the collar I51. Extending longitudinally of the base I and par-' allel with the work spindle axis of the lathe is the 76 actuating cam slide- I62 carried in suitable guide 2,410,026 9 10 way surfaces I64 and I65, and on the anti-friction supporting rollers I66 in the Web member Ia of which engages a cam slot 84 of the cam drum 8I so that rotation of this cam drum 9i causes slid ing motion in the cam slide I63 which also car the base I and the cam slide I63 is carried in guide ways I61, I68, and on the supporting rollers I69 in the web portion lb of the base I of the ma chine in this particular arrangement the turn ing tools or tools which feed substantially parallel to the axis of rotation I46 of the work spindle are ' 5 ries the cam I99 which thereby actuates the stud I81 to cause vertical sliding movement in the cam plate I89 and through the medium of the form bar I19 bearing against the abutment block I11 to swing the tool holder in the arcuate path of feeding 291, Figure VIII, to present the tools I14 mounted on the upper tool bar I44 and comprise a tool slide base I 19 which may be clamped to the 10 to or from the work. This motion may be utilized bar I44 by means of a clamping screw I1! and either as performing facing operations with the which has mounted on top of it a tool slide or tools I14 or the cam drum 8| may be so arranged holder I12 having an adjustable screw I13 for as to effect motion sufficient to merely cause the accurately moving it to set the cutting tools I14 tool relief in the turning tools I14 from the work in the tool block I 15 to proper depth and accuracy 15 during their longitudinal return movement. of out. On this tool slide base I19 is pivotally Turning motion for the tools I14, that is the mounted on a pin I16 an abutment ?nger I11 longitudinal or parallel feeding of the‘ tools with which engages the top surface I18 of the form bar respect to the work spindle axis I46 is accom I19. The form bar or plate may be clamped to plished as above described by longitudinally or the Vertical cam plate I89 carried between guide 20 axially sliding the bar I44 to which the tool slide rollers I9I in a bracket I82 ?xed to the base I of base I19 has been rigidly clamped by the screw the machine by suitable screws I83. By suitable I1I through the medium of the block I55 also bolts I84 passing through clearance holes I85 the operating on the cam drum 8I. Thus in this form bar I19 is held on the cam plate and may be particular exemplary arrangement it is possible set at any desired adjusted position of‘either par 25 to have facing or radial infeeding of the tools allel or taper turning by means of the adjusting I14 with respect to the tool spindle axis or to screws and nuts I86. The cam plate I89 has a have longitudinal feeding of the tools along‘said suitable cam engaging roller pin I81 carried on axis. Also in instances where pure turning is a suitable anti-friction ball bearing I88 for easy to be done the tools I14 are moved parallel to rotation when bearing against the cam surfaces. 30 the work spindle axis by axially sliding the bar This roller pin I81 engages in a slot I89 formed I44 and arranging the ‘surface I18 of the form in an adjustable cam I99 Which is pivotally bar I19 in parallel relationship to the work mounted around a T-slot bolt I 9! held in a T-slot spindle axis and by so arranging the cam I99 I92 formed in the cam slide I63 so that it may that it will have no motion effecting the verti be swung around this T-slot bolt I9I to effect dif 35 cal movement of the cam plate I89 during the ferent angular positions of adjustment such as normal turning operations. This cam I99 how shown in Figure XIV indicated at the I892; posi ever would in this instance have certain relief tion of adjustment of the cam slot for a minimum portions out in it where the cam plate I89 would of angularity to the cam while the position I99 drop down slightly just after the completion of shows the steepest position. At the other end of 40 the turning operation on the work so as to re the cam I99 is out a rack I93 whose arcuate shape lieve the tools therefrom, during the return is radially positioned from the axis of pivoting of movement of the bar I44 in bringing the tools I14 to initial cutting position. ' the cam around the T-slot bolt I9I. A suitable“ bore I94 is formed in the end of the ‘slide I63 for It is also to be noted that taper turning can - insertion of a pinion gear I95 carried on a shaft ‘ be readily done with this construction by merely I96 (Figure XV) having an operating‘knob I91 setting the form bar I19 in angular relationship for easy positioning of the cam I 99 to the desired to the work spindle axis in proportion to the de angular setting. A clamp I99 operated by a suit sired taper to be cut on the work piece. Pure able bolt I 99 and having a lipped portion 299 may facing operations would be accomplished with be tightened to lock the cam I99 in any desired 50 the front tools I14 by merely having the cam angular position of setting, after which the bolt plate I99 fully operative to effect vertical move I9I is similarly tightened to rigidly hold the cam -ment in the cam plate I99 during which time for operating the machine. the bar I44 would be locked against axial mo Referring particularly to Figure XIV, it will be tion and would have only rocking motion for the noted that the portion of the cam embraced by 55 tools I14. ‘ the angle 29I is radially positioned with respect In this disclosure also is shown a similar set to the point of pivoting around the bolt I9I and up for actuating the facing tools which are car this portion of the cam is so arranged as to give ried on the bar I45 by means of the facing tool the proper dwell and accurate positioning of the holder 291 which may be clamped to the lower tools to the work and by means of this constant 69 tool bar I45 by a suitable clamping screw 298 radial positioning of the angular portion 29I of and which has mounted on it a tool block 299 the cam slot I89 the cam may be set to any de_ carrying the facing tools 2I9. sired angular position of feeding while at the Similarly this facing tool holder 291 has an abutment block 2| I same time always maintaining the same dwell or mounted on a suitable pivot pin 2I2 which en ?nish position of the tools. When readjusting the ‘35 gages the form bar 2I3 which is similarly held cam to any desired position of setting along the into place by screws 2I4 on the cam. plate 2I5 T-slot I92 of the cam slide I63 it may be desirable and which may be adjusted in the desired posi in some instances to withdraw the engaging roller tion by the adjusting screws 2I6, in a fashion stud I81 which may readily be done by removing similar to that for the arrangement for actuat the screws 292 and pulling out the carrying car 70 ing the cutting tools I14. In this instance how tridge on the stud 293 by means of its manipulat ever the abutment block 2 II is carried on an ad . ing handled portion 294 as best seen in Figure justable piece 2I1 which may be locked in vari VIII. oust positions in the arcuate guideway 2I8 by 1 This front cam slide I63 has ?xed on it a roller means of the clamping bolt 2I9. In this way a 295 carried on a stud 296 ?xed in the cam slide ‘75 greater range of relative positioning of the tools 2,410,026 I ll 2I0 with respect to the work spindle axis may be effected along its arcuate path of‘feeding 222. The cam slide I62 similarly carries a cam 22! like the cam I9!) just described for the front tool slide turning tool I14 which actuates a roller pin 222 carried in a suitable anti-friction bearing 12 feed for the cutting tool 228. This cam 241 has a cam slot 25! which actuates a pin 252 ?xed in a slide plate 253 having a rack 254 formed in tegral with it which rack in turn is in engage ment with a pinion 255 carried on the actuating shaft 234 and which may be connected to‘ it in driving relationship‘ through the medium of the 223 in the cartridge 224 held in place by screws hub 255 to which it is integrally connected when 225 on the vertically movable cam plate 2I5. the setting screws 251 of the orienting coupling This cam slide I52 similarly has a roller like that of the cam slide I63 indicated at 225 car 10 258 are properly clamped. The outside portion 259 of the coupling 258 can be positively attached ried on a'stud 221 (Figure VI) which engages in to the actuating shaft 234. The purpose of this a suitable cam track 84 in the cam drum 8!. coupling 258 is to permit the proper orientation In this instance of utilizing the rear tool holder of the pinion and rack with relationship to the 221 on the bar I45 primarily for facing or ra cam for starting the tool at the right end of the dial infeeding of the tools 2Iil along the arcuate desired position for beginning the cutting opera path of feeding 220, bar I45 is con?ned against tion. I axial movement by the collars I52 and I53 and On the other end of the actuating shaft 234 that purely vertical motion in the cam plate 2!?! is ?xed a pinion 25E] Figures X and XI which effected through the medium of the roller pin 222 and movement of the cam slide I52 by the 20 drives a mating pinion 25! carried on a suitable stud v2I52 ?xed in the base plate 233 and driving cam drum 8! is utilized. It is to be further a rack 253 fixed on the tool slide 23!}. A suitable noted that in this particular arrangement be compression spring 234 is used to normally force cause of utilizing the lower bar M5 for racing the tool slide away from the work piece to at all rather than the front bar, that lesser arcuate times take out any slack between the rack and path of feed 2253 is provided and a greater range pinion and cam driving mechanism just described of facing may thus be undertaken. By main during the turning operation and to prevent the taining the bars I44 and I45 substantially in the tool slide 235 and the tools 228 from dropping same vertical plane passing through the work down toward the work piece when cutting action - spindle axis the chips are easily disposed of as‘~ is relieved therefrom and which would other they drop‘freely into the pan of the lathe and wise make it dif?cult to do accurate ?nishing with also easy accessto the cutting tools is thus pro vided from either side of the machine. The cam drum 3! is designed with appropri ate cam slots (not here shown in detail as this mechanism is readily understood and well known in the art) for actuating the block I55 and the cam slides I53 and I52 in appropriate sequential this cutting tool. This is accomplished by spring 264, engaging in the upper portion 255 of a suit able bore 266 formed in the slide 233 and bearing against a guide block 261 rigidly ?xed to the base plate 232 by suitable screws 268. It can thus ' be seen that as the cam slide 246 is moved'back or forth in the guideways 245 its cam actuating relationship to effect the various operations de: means and roller pin 252 will rotate the shaft 234, sired of the lathe of both tool reliefs and feed motion either radially into the work for fac 40 the rack .2 54 and pinion 255, and the pinions 25!] and 26! which actuate the rack 263 ?xed on the ing or longitudinally of the work for turning. slide 230. ' In addition‘ to the cutting tools IIII and 2!‘..3 The cam slide 245 is actuated in its guideways just described there may be provided additional 245 from the cam drum 82 mounted on the cam tooling comprising the cutting tools 228, Fig ures I, XI, and XII carried in appropriate tool 4k 31 drum shaft ‘I’! as best seen in Figures II, III, and IV. The shaft 1'! is supported at its outer end block 229 mounted on a vertical universally in, a suitable bearing 259 in a bracket 21!] ap mounted tool slide 23%}. This tool slide 232 is propriately ?xed to the left hand end of the >mounte-d on suitable dovetail guideways 23! and base I of the machine by suitable screws 21'! 232 on a base 233 which is mounted on a swivel around the axis of an actuating shaft 232 appro priately journaled in the supporting housing 235' to which the base plate 235 is fixed by means of best seen in Figure III. On the tool supporting bars I44 and I45 is slidably mounted the actuat ing block 212 having a downward depending roller suitable T-slot bolts 231 operating in a concen 223 carried on a suitable pin 214 ?xed inthe ac tric annular T-slot 233 formed in the base plate 236. This base plate 235 in turn is mounted to the overhead tool supporting rail 23% by suitable tuating block 212 and which roller 213 operates T-slot bolts 246, as best seen in Figure XI. In this way the tool slide base 233 may be set to ; in an appropriate cam slot 85 formed in the cam drum 82. By this arrangement the block 212 is slid along on the bars I42 and I45 independent of any motion these bars may have. On' one side of the block 212 is provided a pair of lugs, any desired angular position so that the cutting tool 228 may be fed at relatively steep angles 60 Figure II, forming a slot 215, in which operates a for cutting such work as bevel gear blanks and the like. shoe 215 ‘carried in the end of a lever arm 211. ‘and guided in the guideway 245 as best seen in Figures II and IX is the cam slide'245 which carriesv an actuating cam 24'! of similar design to that of the cams I93 and 22!, Figure VIII, already described. This cam may similarly be The outer end of the bars I 44 and I45 adjacent the blocks H2 is supported by a supplemental bracket 21% carried on the bracket 219 ?xed to 7 the end of the base I of the machine. In this way support is given to the tool bars I44 and I45 for holding the actuating block 212 in proper operative position relative to the cam drum 82. The lever 211 connected through the sleeve 215 to the actuating block 212 is mounted on a pivot pin 229 held in a bifurcated downwardly pro jecting integral support portion 289 of the over head rail or tool supporting member 239 and has adjusted by manipulating the clamp bolt 249 and its clamp 25!] for setting the desired rate of in its upper end a shoe 28! which operates in an ' elongated cross slot 282 formed in the cam slide This overhead tool supporting rail 239 is mount ed on the headstock by suitable means such as the bolts 24! and is carried on a pedestal 242 appropriately mounted on the tailstock by screws 243 and connected to the overhead rail by screws 244. In this overhead tool supporting rail 239 ' 2,410,026 13 246 so that as the cam drum 82 rotates it will slide the actuating block 212 along on the bars M4 and I45 thus rocking the lever 21‘! and thereby sliding the cam slide 246 in the member 239 to effect feeding of the cutting tool 228 to and from the work piece in the lathe. It is to be further noted that the cam 82 is mounted on the same shaft as the cam drum 8| so that all of the cutting tools including the cutting tool 228 mount 14 said second axis, a form bar adjustably mounted on ‘said plate means, to contact and pivot said holder about the axis of said bar, a cam slide means on said lathe, translatable parallel to said axes, and a connection between said'slide means and plate means, said connection including a cam pivoted on one said means and a pin on the other of said means adapted to coact withsaid cam to variably transmit motion from said slide ed on the tool slide 230 may be operated in a 10 means to said plate means. predetermined sequential relationship relative to 2. In a lathe having a base, a headstock and one another. By appropriately setting the swivel a tailstcck on said base having centers to receive slide 233 around to any desired position the cut and rotate a work piece upon a ?rst axis, in ting of any steep range of tapers desired with combination, a tool bar mounted for pivotal and this overhead tool feeding arrangement may be 15 axial translation in said stocks on a second axis undertaken. parallel to said ?rst axis, tool holder means ad Having fully set forth and described our in justably secured to said bar, a plate guided for vention what We claim as new and desire to se translation on said base in a direction spaced cure by United States Letters Patent 15: from, and normal to said second axis, a form 1. In a lathe having means for receiving and 20 bar adjustably ?xed to said plate and having a rotating a work piece about a ?rst axis, a bar journaled for rotation on a second axis parallel to said ?rst axis, a tool holder adjustably secured to said bar and adapted to hold a tool in cutting cam edge engaging said holder, a cam slide in said base, adjustable cam connections between said slide and plate, and a single means having a cam slot therein connected to said bar to e?ect engagement with a work piece in said lathe, plate 25 translation of said bar and said slide. means guided for translation on said lathe in a WILLIAM F. GROENE. direction spaced from and angularly related to HARRY C. KEMPER.