Патент USA US2407520код для вставки
Patented Sept. 10, 1946 2,407,519 » UNIT-ED .STATES PATENT ¿0F FICE INSERTED Toorn amori 7v_viifrea slater, Quinton, Birmingham, England. l Application september 16, iaiaseriazmn. .states " v @Claims (Cl. Bil-1.05) Tl'l'ris invention relates 'to metal working 'tools such as hubs, breaches., taps, andthe like, .of 'the kindincluding a' supporting body .and a plurality of .cutting elements mounted thereon. ' grinding wheeror ineiikeasuepicied in .the .righi -Theobject of theinventionis ya process .and/or means for forming or grinding cutting elements or teeth 'in a simple rapid manner which yields the desired form or allows "1t to be subsequently realised by a simple operation; which elïects a considerable saving in labour and machine time.; 10 and which lengthens the effective working life of . the velementsand consequently'the tool jinto which they are built. ` Having 'the aforesaid and other objects in View half -of Figure l. In this position andduringsuch process, the »rearedge .5 »of- eac-h element is farther from the eentrefofithe .body than it is when placed in :a cutting .or working positionsuch .as shown in the left half :of Figurel so that when reassembled in the Working position for use as acutterzbyvre» versal .or displacement through 180°J the .newpo sitionrelative to or :measured from the body ,cen tre .provides the »desired relief :away rfrom the .eut ting edge, the effect .being to yexchange .the posi-r tion of :the iront »and rear edges. The dotted line yat the top .of Figure ,1. shows the working position .of .a segment .superposed .on its making as will Aappearin ,the Iollowing description, the 15 position. >Cutters Ymamita.ctur'ed .in the manner described by .collective yfabrication .can be reassembled .in ting >elements of inserted'tooth tools which Vis so either` of two ways; one, .on a body of normal .type shaped and constructed that the peripheral .sur preferably modified; .the other, on the same body faces of the elements when assembled .on the body can be machined„ground, or similarly processed 20 as is used .for making the cutters. In the latter case,.the >,leading face .of .the .cutting .element „is as segments of .a `common circle which when the tangential unless modified i.. «.e. rit has :negative elements are reassembled in working or Vcutting rake, but this can be ground to an anglewhi-ch position, Vprovide relief away .from the cutting provides Vpositive .rake .as `indicated at 5 in '.Fig edge. zIn'this way, a simple turning, grinding, or invention Yconsists in a bodyor holderfor the cnt like roperation which can .be Vcarried out on a standard kind ,o'f'machine 'tool is substituted for the 'more numerous and complex operations „pre viously needed. . , VFurther features vofthe invention .are more par ticularly described inthe annexed .speciiicationV andy pointed out .in the appended claims. .l ure 1. A Suitable blank for cutting .elements in minar manufacture .consists :of a length .of .tour-sided bar with .anat 'base 2, two sides converging at an . appropriate .angle which vis determined by 'the number of elements insay a rotaryhob, .or other wise .according .to «the Aparticular application of the tool, .and a „dat or .curved periphery which is' Reference may be 'had -to 'the .accompanying operated upon as aforesaid .and .finishes as aseg drawings ‘in which 'Figure l ¿is an end view _partly in section„par.tly ment ,of ya circle. ' inelevation o'f.a‘tool^according tothe invention., "10 1A 1n .one arrangement .o'f.seat and .element »where the same .body is .used .formaking v.the -.elements Figure 2 -is a .half sectionalelevation at vright angles to “Figure .1. ' . and .for .manufacturing -use, the `.door .or .base of eachseatinggroove 2 is atright angles to a radial Figures 3 and ’4 illustrate other lapplications .of line ,from .the corner which leads whenfcu-tting, cutting _elements .made in .accordance with the invention. 40 when said corner 'l is in position for making, the blank .sides diverge isogenically, and .the leading Figures ‘5 and '6 depict the .improved cutting elements mountedin Workingposition on amodi ñed body. face B of ythe element .makes .an .angle with the radial line il .one-.half of >that _included bythe ,In an embodiment .QI `.the .invention shown in two sides -.8„ lib.A The peripheral longitudinal Figures 1 .and 2, the '.bod-y l .is provided with .a grooves .2 are .of , sawtooth fconñguration _the long number .of longitudinal `.seating .surfaces „or limb of which constitutes .the seat A2 and the .short limb il of which =»defines 'the .circumferential po grooves 2 each .of whichis shaped .and .inclined or Vcurved to suit the under .tace of .a .cutting Aele» ment '3 ¿Lwhich `said .tace is .preîerably flat.) .and tilt .or .hold »the .element -so .that its periphery V4 becomes a segment of a circle or is .susceptible of taking such a curve when the body is rotated sition .of the ,relevant element. The several -ele'- ì ments are adapted to be .assembled in such a , manner that .each one abnts and >is abutted by its neighbours so that they behave as a .solid cutter. úAny .appropriate .means may be v.adopted for I gripping -and -holding the elements .in situton aboutfitslongitudinal `aids and the peripheral sur the body, and one such convenient means will faces of the several cutting elements are in con tact with and are operated upon by a cutting tool, 55 now be described. 2,407,519 4 3 At each of the two ends of the body is situated a clamping plate I2 of disc shape inset into a re cess partly in the insert element and partly in the body end, these being pressed home by screws, porting independent tooth tools for simultaneous shaping into cutting elements and subsequently supporting said cutting elements in cutting posi tion, said body being peripherally formed with preferably countersunk. immediately successive recesses to present flat Such endwise and also a radial movement is transmitted to each ele ment by the agency of inclined planes conven iently in the form of a cone-ended vscrew I4 in the disc and a complementarily-shaped cavity I5 in each end face of each element, the arrange ment being such that the thrust from the screw ends is translated into resultants acting at an angle to the end faces. To ensure this action, a slight clearance (shown exaggerated) is pro seats and tooth tools having ñat bases to seat in said recesses and bear throughout on the iiat seats, the extended lengths of the‘tools beyond the recesses> being in relatively mutua1 contact throughout the circumferential length of the body to present the free ends of the tools remote from the body as relatively rigid segments of a common circle to permit desired shaping of the ends of-the‘tools in a single operation under ro vided in the cavities. By clamping the end plates 15 tation of the body, the formation of the seats, the in position, the elements are collectively and in-_ cooperating ends of the tools and of the tools be dividually located and gripped so that they func yond the seats providing for a movement of the tion as a solid body. / When the elements are displaced through an formed tools throughout 180° to arrange the tools in cutting position on the body with the tools hav angle of 180° to bring them into cutting position, 20 ing a Vsubstantially identical cooperationwith the the rake or angle of the leading face is, as before mentioned, of a negative order which is appro-_ priate for some metals; grinding of the faces to provide positive rake can be effected by conven tional tools and methods preferably when the ele ments are disassembled, though they can be 'ground in situ. ’ As the cutting edges of the elements become seats and with each other beyondthe seats in the cutting position as in the forming position. 2. Means for supporting -independent tooth tools comprising a body peripherally formed with recesses having flat seats and tooth tools to co operate with the seats, each of the tools having sides converging toward the seats and a flat end to engage the fiat seat of a recess with such ñat worn,- they can be sharpened and restored time _ end, the converging sides of the tools being in after l"time by regrinding until they are almost 30 mutual contact beyond the seats in all positions worn away, since they are buttressed by the ad of the tools relative to the body, the tools'having jacent face of the proximate element which gives two relatively reversed positions with respect to solid and adequate support; therein the improved the body, one to dispose the tools for making the elements differ from known cutters in which the cutters and the other to dispose the tools as cut-~ members are separated by spaces. This continu 35 ting elements with respect to the body, the tools ity characteristic of tools according to the in in either position having a flat bearing on the flat vention provides a smoother cutting action and surfaces ofthe recesses and a mutual contact be assists in obtaining greater accuracy. yond the flat surfaces throughout the peripheral The contour of the periphery of the cutting ele length of the body. ' ' ments is adaptable to the form required e. g, 40 3. A construction as defined in claim 2 wherein straight, formed (an example‘being indicated by in either position of the tools relative to the body, dotted lines I6 Figure 2) threaded for -thread the tools extend beyond the body in mutual con tact to deñne a continuous ring of metal com milling, etc. Cutting elements manufactured as described posed solely of the cutters in either of said posi tions, whereby to establish a regiditive position, a may, as adumbrated, be assembled on and used with a normal type body the periphery of which continuity of function and an extreme accuracy has a number of longitudinal flats which form in operation. seats for the bases of the cutters. Thus a body 4. Means for supporting independent tooth tools comprising a body peripherally formed with isillustrated in Figures 5 and 6 wherein the ends of the cutters are frustroconoidal in shape, to en - - 50 recesses having flat seats and tooth tools to co operate with the seats, each of the tools having gage with similarly coned collars I1, I3 one of which is screwed on the end of the body and the other is pressed by a nut I9 at the other end. To sides converging toward the seats and a flat end to engage the iiat seat of a recess with such iiat improve location of the several cutters, I propose end, the converging sides of the tools being in to add an upstanding ring 20 at or about the 55 mutual contact beyond the seats throughout the middle of the body and groove the underface of each insert to fit closely thereon. In this modifi cation, the leading face 8 of the cutting elements is radial, as is a line drawn through the centre of each cutter. ` ' Cutters made according to the invention are obviously capable of utilisation in diverse forms circumferential length of the body to present the free ends of the tools remote from the body -as relatively rigid segments of a common circle t0 permit the desired shaping of the ends of the 60 tools in a single operation under rotation of the body, and means for supporting the shaped tools comprising an independent body peripherally formed with flat seats to cooperate with -the formed tools, the sides of the tools converging to employed. Figure 3 shows a cutting element 3 65 wards the seats and the iiat ends of the toolsl engaging the flat seats with such flat ends pre fixed in the tool post 2| of, say, a lathe, while Fig senting an equal angle to each of the converging ure 4 illustrates a broach the body 22 of which sides of' the tools, the converging sides of the carries in series several cutters. Other applica of tools in which a series of cutting elements is secured to a body, and also when a single tool is tions will be self-evident.A tools being in Amutual contact beyond the seats ` _Having thus described my invention, what I 70 throughout the peripheral length of such inde claim is: ` pendent body. ' ' y 1. Means for supporting independent tooth tools comprising a circular body formed for sup WILFRED SLATER. "