Патент USA US2410955код для вставки
NOV. 12, 1946. _1_ |__ TORGERSQN 2,410,955 GRINDING MACHINE FOR SHAPING WORKPIECES Filed Oct. 25, 1944 2 Sheets-Sheet l INVENTOR Josep/v l. Emsa# BY A-rToRN EYS . Nov. 12, 1946. VN"MîîîîmmsizRsoN 2,410,955 GRINDIÑG MACHINE FOR SHAPING WORKPIECES Fiied Oct. 23, 1944 2 SheeÍlS-Shee'fl 2 i I 1 1 INVENTOR W 5@ 9 Jafar/f4 7beœzsav AT TORNE~Y5. 2,410,955 ‘ Patented Nov. 12, 1946 UNITED STATES PATENT OFFICE] f , GRINDINGY‘MACHINE Fon SHARING ‘ WoaKPIEcEs ‘ Y Joseph L. Torgerson, Milwaukee,‘Wis. Application October 23, 1944, Serial No. '553,876I 5 Claims. (C1. 51-92) 2 , . 1 grinding machines. „ „ . of the subirame movement to raise vand lower This invention relates to improvements in ' ' y l the work to and from the grinding wheel I5. ' ` Mounted‘on the subframe ll is a tiltable table 25 provided Vwith ears at 26 supported on a rod 21 which extends transversely of the frame and upon Whichtable 25» may be oscillated. It is ad justably fixed in its oscillatory position by a lever It has Aparticular referencev to a structure es pecially adapted for they sharpening of the cru ciform blade of a meat grinder, but many of `its features are also adaptable to other grinding problems. 28 extending from its forward margin Vand pro vided With a clamp screw-:29 operating'in a seg ious adjustments and movements of a blade with 10 ment 30. 'n It` is the function of table 25 to de» 1t is the object of the invention to povide a novel, improved and simpliiied form for the var ‘termine with accuracy the angle at Which the facesy of the respective blades of the work pieces respect to a grinding wheel, and to make the achievement of the requisite movements as easy will be ground. ` y y and simple for the operator as is possible. The table 25 isvprovided, as best showninFigs. The objects Will appear' in moredetail to those skilled inthe art upon analysis of the 'following 16 4 and 5, withgibïmeans'32, constituting aguide disclosure of the'invention. In the drawings: ` i way Vupon which the slide 133 is' reciprocable to ` and from the main frame. Reciprocation is manually effected and controlled -by a hand lever 34 pivoted to the' slide at 35 and provided with Y Fig. 1 is a’side elevation of the machine em bodying the invention. ' ` a movable ‘gfulerum at >35 Yupon a link> 31 pivoted at -3-8_'to`the table 25l (see Figs. 2 and 3'). " The crossr slide 33 may be‘provid'ed with an Fig, `2 is a plan View of the machine shown in Fig. 1. ' Fig. 3 is an enlarged detail View in plan of the Work in place upon its work support. ' Fig. ‘iis a side elevation of the structure shown in Fig. 3. Y ì ` 1 l 25 is a `function of this slide. toreciprocate beneath . Fig. 5 isa detail view> taken in section on the line 5-«5of Fig. 3. adjustable stop at 39 engageable with the gib means-3.2 to limit A"the movement of the slideto' ward'the grinding -Wheelïand themain frame» It the grinding Wheel l5 the blade to be ground and, if desired, to bring the edge of another blade into contact with the wheel. ~ Fig. 6 is a plan View of a Work piece in oper ative, relationtogthe grinding Wheel (illustrated On the slide 3_3 a cup-shaped supportßllßis cn-> in broken lines) .. gaged by the inverted cup-shaped Work carrier Fig; ‘l is a view__iragmentarily illustrating the 4l, the coacting parts of these members being of grinding wheel in side elevation and showing in circular cross section to permit of the indexing of section the blade operated on thereby, the rest the work carrier 4| with respect to its support oi the’knife assembly being indicated in broken 45. The nxtures 42~ and the square plug 53 on lines in proper relation tothe blade upon which - v»the face of the Work carrier are made to receive the Wheel is acting. j y land. position the work piece 45 which, as shown, Fig. 8 is a plan view‘of the sharpened work is a cruciform article, having four blades 46 re piece. . . ` Like parts are designated with the same ref erence characters throughout the ¿several views.` quiring grinding on the surfaces 4l and 48' (see 40 Figs. 7 and 8). ` , ' f The indexing work carrierY 4l has, on. its outer The machine ccmprise's a main frame yat lllpro periphery, a number of lugs at 49 corresponding vided with bearings at »il and i lzlfor the’ Shaft to a number of «bladesk requiring sharpening. I3 upony which the grinding wheel l5 is sup' `Surrounding theA cup-'shaped support 40 isa gage ported. >Pivoted from vthe mainframe by means: 45 ring 53 provided with a handle 54 yandwitha of a bar I6 is a subframe Il'which has oscilla tion in a vertical plane limited by the nut I-8 adjustably threaded on a stop bolt I9 operating clamp bolt 55 extending through the slot 56 into ' threaded connection with the slide 33. When the clamp bolt 55 is loosened, the handle 54 may be through a bracket 20 projecting from the main used to adjust the position of ring 53 to that frame. 50 point where its stop `5l will be engaged bythe successive lugs »45 of the work carrier in position The free forward end of the subframe, from of the carrier in which the respective blades l46 which the stop boltl i9 depends, is raised by a' of the work piece are accurately positioned for foot pedal 2l in the ‘form of a lever having a engagement by the grinding Wheel. connection to the subframe through the turn buckle 22, as shown in Fig. 1. It is the purpose 55 >The work piece being positioned on the fix 2,410,955 4 tures 42 of the carrier 4|, and the carrier 4| being guideway, handle means for reciprocating the manually indexed to engage one of its lugs 49 with the stop 51, it will be found that one of the blades of the work piece Will bear properly pre determined relation to the grinding Wheel |5. slide, and a work carrier provided with an index mounted upon the slide. This relationship is predetermined, as above in 2. The structure of claim 1, in which said han dle means comprises a lever centrally in pivotal connection with the slide and having a fulcrum dicated, by the indexing of the positioning ring connection with a link, said link being pivoted 53; and by the tilting of the table 25. to said table. 3. The structure of claim 1, in which said slide The sub-frame |1 is now oscillated to move the Work piece upwardly, this being done by pres 10 is provided with a support on which the Work sure of the operator’s foot on the pedal 2|. The carrier is rotatably mounted, and the work car exact ultimate position may be predetermined rier is provided With a stop, said slide having an arcuately .extending stop member provided with by the limit nut |8. With the subframe raised, the operator now draws the handle 34 to the ' `stop means for coacting with the stop of the work right, as viewed in Fig. 3, thereby advancing slide 15 carrier, said member being adjustably mounted 33 to draw one of the blades 46‘beneath the on the slide and having clamping means for main grinding wheel. The operator himself Will reg taining its adjustment angularly about the work ulate the extent to which the entire length of carrier. the blade may be passed beneath the wheel. 4. In a device of the character described, the Ordinarily, more than one traverse will be made 20 combination with a main frame and a grinding and, in the ñnal traverse, the slide 33 may be given the extreme movement permitted by, stop screw 39, thereby bringing the edge 48 of an other blade into contact with the side face of the wheel |5„as shown in Fig. 6. , ` The surface 41 of the blade closest to the wheel and the edge 48 of the next consecutive blade of the work piece having now been ground, theop erator will release pressure on the pedal 2| to allow the subframe to be lowered to the position wheel provided with means operatively support ing it from said frame, of a subframe in pivotal connection With’said frame atV a point remote from’said wheel, said subframe having a portion 25 adjustable to and from the Wheel, means includ ing a foot pedal and link for actuating said sub frame portion toward the wheel, a stop bolt in pivotal connection with the subframe 4and pro vided with a stop nut, said frame having bracket 30 means with which said nut is engageable where illustrated in Fig. 1, whereupon he will manually lift the' indexing Work support 4| sufficiently to enable its lug 49 to clear the stop 51. He will thereupon index „the support V90"` to engage its by adjustably to limit the approach of said sub frame portion to said wheel, a table provided with grinding of the blades. Moreover, the grinding tion of said slide respecting the table, a circular support upon the slide, a st‘op'ring disposed upon a transverse pintle pivotally connecting the table , with the> subframe, a lever on the table,A a seg next successive lug With the stopl 51, thereby posi 35 ment on the subframe With which said lever tioning another blade to be operated on by the coacts, clamping means for adjustably securing wheel. The cycle of operations,'as above de the lever to the segment whereby adjustably to scribed, is then repeated. ñx lthe ltilted position of the table respecting the When the device has been properly set in the subframe, means providing a transverse guide manner aboveA set forth, it will be apparent that .49 Way on the table, a slide> reciprocable on said guideway, stop means for limiting the reciproca n0 skillwhateveris required to` achieve> perfect may be effected very rapidly, the operator’s left the slide about the support, means for adjustably hand controlling the lever 34,*his foot controlling the pedal 2|, and hisY right hand remaining avail 45 determining the angular position of the stop ring respecting the slide, a work carrier rotat able for indexing the work support and‘position ing and removing the `Work pieces. I claim: - ` f l . 1. In a device of the character described, the combination with a frame and a tool' operatively supported therefrom, of a fulcrum bar project ing laterally from the frame, a subframe pivoted on said bar and having a portion pivotally mov able to and from said tool, means for actuating ably adjustable upon the support, said ring and ,carrier having means interengageable in select ving indexing positions of the carrier, and ñxture 0 means on the carrier for supporting aserles of blades to be successively indexed into operative position beneath said vvvhe’el to be sharpened thereby, the movement of said slide carrying a selected blade longitudinally beneath 'the Wheel said portion comprising a pedal and> motion 5,5 `at an angle determined by the tilt of the table and a level determined by said stop nut and transmitting connections from the pedal tosaid subframe, stop means adjustable between _ the bracket `when said subframe portion-> is elevated by said pedal. ' subframe and the frame-for limitingthe pivotal n 5. 'I‘he device of claim 4, in further combina movement of the subframe, a table, pintle means pivotally connecting the table to .the subframe 60 ltion with slide actuating means comprising a link whereby-ï said table is tiltable res'pectingfísaid Apivoted to the table, and a hand lever fulcrumed tothe link and Aprovided with a pivotal connec subframe, clamping meansior ñxingthe'posi tion to the s1ide.` ` ‘ ` . ’ ` tion of tilted adjustment of the table respecting the subframe, means `providing.aguidevvay trans 65 ‘ ` JOSEPH L. TORGERSON. versely of the table, a slide reciprocableupon the .