Патент USA US2405609код для вставки
Aug. 13, 1946. w. F. ROSS 2,405,609 FORM TOOL CHIP BREAKER GENERATING FIXTURE Filed Aug. 17, 1944 2 Sheets-Sheet l 8. mm m 1 . IN VEN TOR. - "(Wm/VJ GEM. Aug. 13, 1946. w. F. ROSS FORM TOOL CHIl'3 BREAKER GENERATING FIXTURE Filed Aug. 17, 1944 %\ \\ mm lf m. E“r.swanmc1u52x?flh_ mail: JHul"In.UMm?H|EzlJr>W‘I l b %m.R. . 9!?11 m lmwt'r? III 2 Sheets-Sheet 2 Patented 'Aug. 13, 19,467 _ i 7 2,405,699 _ - - “UNITED *islTATEs PATENT (OF-neg , 2,405,609 FORMv TOOL CHIP BREAKER GEN ERATING’ FIXTURE ‘ .. . ‘ ~ "Walter F. Ross, Detroit, Mich; assignor to Motor 1 Tool Manufacturing Company, Detroit, Mich, a “corporation of Michigan , ‘ Application August 17, 1944,'Serial No. 549,891v _ - a . 2 Claims. 1 (Cl. 51-100) \ 2 , .This invention relates to mechanism for the grinding of chip breaker interruptions inthe cut ting teeth of rotary form tools, and similar tools having pro?led outlines of varying diameter throughout the length thereof, and has for its ample, having reference to the accompanying drawings, wherein: said invention; 1 I‘ Figure 2 is a longitudinal vertical section taken ' on plane indicated by the line 2—2 in Figure 1; , object to provide an arrangement which is read ily adaptable to produce this operation quickly ’ , Figure 1 is a plan of a ?xture'embodying the . and I ' ' - and accurately on different shapes and sizes of Figure 3 is an end elevation ofthe device. tools without calling for tedious and critical set Similar, characters of reference indicate similar tingup of the work. , v 10 parts in the several ?gures of the drawings. A still further object is to provide such a mech l0 indicates the base structure of a grinding anism of simple and easily constructed form machine on which the longitudinal movable table which maybe readily attached as a ?xture to an H is mounted, ‘which table II in turn carries the existing grinding machine. transversely slidable table 12. The base structure A still further object is, to provide in such mech 15 H1 is provided with upwardly extending arms l3 anism for the simple coupling of the work to a and 14 supporting a rider bar l5 which extends follower ?nger, co-acting with a vdummy or pro across and above the transversely sliding table l2. ?led stop de?ning the envelope of the work, in It represents a grinding wheel which is supported such manner that the rotation of‘ the work will and driven in any well known manner (not be accompanied by the traverse of the follower 20 shown) and with respect to which the said table ?nger over a line de?ning the contour of the I 2 is longitudinally movable together with the dummy and such traverse translated into move table II and transversely movable upon the said ment of the work relative to the grinding wheel table H. v I along such de?ned path. . - 4 ‘v 41 and I8 are tailstocks mounted on the said Still further, objects or advantages additional 25 table I2, 19 and 20 being centers mounted 'inthe or subsidiary to the aforesaid objects,‘ or result said tailstocks to receive the work 2| therebe ing from the construction or operation of the in tween, and 22 and 23 are similar centers carried vention as it may be carried into e?ect, will be— by the said tailstocks in parallel relation tothe come apparent as the said invention is herein- ‘ said centers [9 and 20 to receive a dummy 24 30I having a, pro?le which is that of the‘envelope of ' after further disclosed. ‘ In carrying. the said invention into e?ect, I may provide a transversely slidable table mount . ed on a longitudinal movable table which in turn the cutting surface of the work 2| to be operated on by the grinding wheel, said dummy 24 acting as a pro?led stop forv the transversely slidable is mounted on a ?xed supporting structure, said table l2 as will be further explained. transversely slidable -‘ table carrying a ?xture, 35 The rider bar I5 is provided with a normally which includes a pair of work carrying centers ?xed but'adjustable bracket 25 carrying a follower , and a pair of dummy carrying centers arranged ?nger ' 26 which ?nger is intended to impinge in parallel relation to said work carrying'centers; against the pro?led surface of the dummy or stop a follower ?nger having longitudinal line contact 24 under the in?uence of a weighted lever 21 ‘with said dummy and carried by a rider bar sup 40 linked to the back of the said transversely slidable ’ported by said ?xed structure, means biasing said table l2 and thus biasing the said table l2 in the transversely slidable table to maintain said dum direction, of the grinding wheel. This lever 21 my in contact with said follower ?nger during lon will also operate as a handle, by the manual rais gitudinal movements of said correspondingly ing ofwhich the said table l2 may be moved away movable table; a hand operated lead screw linked from the grinding wheel. It will be obvious that to said ?xed follower ?nger, whereby the longi such movements of the table accompany corre tudinal movement of the dummy may be effected, sponding lateral movement of the dummy or stop I and means. transmitting rotary motion of said 24 relative to the ?xed follower ?nger 26, and it feed screw to the work, whereby the said work will also be obvious that, if the said table l2 on may be rotated in contact with a grinding wheel its table ll be moved longitudinally so that the as the said work is simultaneously moved longi pro?led dummy or stop 24 is traversed relatively tudinally through a path de?ned by the line con by the follower ?nger 26, the said table will be tact of the said follower ?nger with the pro?led caused to recede from the grinding wheel as the dummy. All of which is more particularly de diameter of the stop 24 increases. This, longi scribed and ascertained hereinafter, by way of ex 55 tudinal movement of the said table I2 and its acoaeoa Y " Q dummy or its ‘sto'p‘rlll relativeto the said'follower , ‘ dummy. any surface or which presented to the ' ?nger “will be accompanied by the lateral slid- - :rollower ?nger will-provide a lineof contact of ing of the said table )2 in accordance with varia- ' . itions’, in diameter ofuthje said stop 21! and these therequired pro?le so that the setting up or the 7 work for the chip breaker grinding is of the very, simplest nature, the work and its corresponding which is thatof the contour of the line on the, ' cylindricalfdummy being simply slipped into po said stop ~24 ‘traversed by‘the followerj?nger'; 26. _, 'sition between‘ their respectivecenters and the ‘follower finger and the wheel adjusted into re This path of travel is or" course transmitted to V the work- 2! asthe saidiwork is mountedonthe: ,10 quired contact ‘with the surface of the dummy or stop and the tooth of the work. same table. This invention may be developed within the ‘To’ eflect the foregoing controlled movementoi scope of the following claims without departing the work relative to the grinding wheel, and also _ from the essential features of the said invention, the, synchronized rotation of the work in order and it is desired that the speci?cation and draw that the said grinding wheel may pass over a ' ings be read asbeing merely illustrative of a prac _ helical path about the envelope of the work'a'nd tical embodiment of the said invention and not thereby notch the teeth thereof at spaced inter . I movements will produce a resultant‘path of travel vals as indicated at 21, I provide a hand operated feed screw, 28 which is shown as being mounted in bearings 29 and 30 carried by the tailstocks I1 and I8 respectively. This feed screw is provided ‘with a ,hand wheel 31 ‘for its manual operation and is threaded through a lead screw follower 32 in a strictly limiting sense. ‘ What I claim is: 1. In a device of the class described, in com bination, a ?xture table having longitudinally and transversely guided'support a pair of work- , I holding centers mounted on said table, a second " pair of centers also-mounted on said table in , which in turn is connected by the'swingable link parallel with said work-holding centers,“a» pro 33 and link pivot clamp 34 to the ?xed rider ?led ‘stop carried by said second pair'of centers, barl5. vIBy ‘reason of the linkage‘ referred to rotation '} a ?xed follower ?nger, means biasing said table ofithe feed screw 28 in one or other direction will to urge said stop against said ?nger, a feed screw naturally result in‘thev longitudinal movement of the table l2 with its supporting table II, and this - carried by vsaid table, a feed nut on ‘said screw linked to said follower ?nger for moving said movement will in turn result in the sliding table 30 table longitudinally and to cause said stop to also move saidatable transversely by virtue of the [2 moving transversely of the table H by virtue riding of said stop over said ?nger, means trans , of the action of a pro?led stop ‘24 on the follower ?nger 26 as previously described; VTo effect rotation of vthe Work while this move; mitting rotary motion'of' said feed screw to the work during such combined movements, and a ment of the table is'being effected I provide in 35 grinding wheel positioned to cutting interruptions in the teeth of said work during the resulting terchangeable gears 35 and 36 removably mounted on the shaft of the feed screw 28 and the shank lineal and rotary movements thereof. of the work 2 I, and so proportioned that the speed 2. ‘In a device ‘of the class described, in combi nation,v a ?xture table having longitudinally and 7 of rotation of the work in relation to the longi - tudinal movement in’ front of the grinding wheel 4otransversely guided support a pair‘of work-hold mg centers mounted on said table, a second pair will producev the desired helical path of the grind of centers also mounted on said table in parallel with said work-holding centers, a pro?led stop carried by said second pair of centers, a ?xed fol produce the spacedchip breaker notches in the teeth of the'work as clearly indicated in Fig 45 lower ?nger, means biasing said table to urge said stop against said ?nger, afeed screw carried by ure 1 of the drawings. ing wheel on the envelope surface of the Work and thereby enable the said grinding wheel to ‘ The provision of chip breaker interruptions in the teeth of ‘rotary form and similar tools is, of course, not new in-itself, it having been a quite ' ccmmon'practice to do this, and the present in vention lies in the simple expedients adopted by which ‘the grinding of such interruptions may be simply and e?ectively accomplished on a form tool of varying pro?le such, for example, as that ' illustrated in the drawings; and a further im portant feature of the invention resides in the use, in the‘ manner described, of a cylindrical - said table, a feed nut on said screw linked to'said follower ?nger for moving said table longitudinal 1yv and to cause said stop to also move said table 50 transversely by virtue of the riding of said stop over said ?nger, interchangeable gears transmit ting rotary motion of said feed screw to the work during such combined movements, and a grinding wheel positioned to cutting interruptions in the 55 teeth of said work during the resulting lineal and rotary movements thereof. ' WALTER F. ROSS.