US1619021A - Abrading machine - Google Patents

Description

March 1 1927.

J. GOULDBOURN ABRADIKNG MACHINE Filed Dec. l5. 1922 2 Sheets-Sheet l /NyE/v Tof? March 1,V 1927. V 1,619,021

- J. GOULDBOURN ABRADI NG MACHINE Filed Dec. 15, 1922 2 sheets-sheet 2 kal ffl

Patented Mar. 1, i927.

UNITED STATES PATENT OFFICE.

EOSEPH GOULDBOURN, QE LEICESTER, E

NGAAND, SSIGNOR T0 UNITED SHOE MA- CHINERY CORPORATION, OF IPATERSON, NEW JERSEY, .A CORPORATION OF NEW JERSEY.

application ined December i5, 1922, serial No This invention l'relates to abrading machines and is herein illustrated as embodied 1n a machine designed for grinding blades rotary cutters adapted for 'use in heel trimmingznlachines,- although in various aspects the invention is not limited tol embodi.- ment in abrading machines of the illus: trated type or to use in grinding heel trimming cutters, but may be embodied in analogous organizations and be useful for similar abrading operations.

Rotary cutters of the type customarily employed. in `machines for trimming the peripheries of heels` arelettch provided with a `ilurality of longitudinally curved blades aving surface and cutting edge profiles determined by the heel contours it is desired to produce. In order that such critters shall perform trimming operations properly, it is essential that all the blades of a given cutter be ground so that their cutting edges shall have exactly the same bevel and profilei The blades of rotary cutters of the abovedescribed type are generally ground by hand and the sltill of the workman is depended upon to impart to the cutting edges of the blades the same curvature as Well as the same bevel thereof. Itis obvious that tl s is a sloyv process and that even an expert who is able to grind one such blade with fair accuracy by manual control cannot take a second blade and grind it like the first. On the other hand, when a machine is relied upon to perform the operation indicated above, it is essential that provision be made for readily presenting all the blades of the rotary cutter in the same position o1 in like positions relatively to the grinding element, and in relatively moving the grinder and the blades through the same cr like paths in order that the same cutting edge bevel and curvature be imparted to the various blades.

Accordingly, it is an object of this invention to provide an improved organization for grinding the blades of a rotary cutter in such a manner as to produce upon all of the blades the same predetermined edge bevel and curvature, Withoutin any respect depending upon the skill of the operative in determining the cutting edges imparted to the various blades. l

i feature of the intention consists in the provision of means for supporting a plurality of cutting blades constructed and ar- ABRADNG MACHINE.

. 607,198, and in Great Britain January 23, 1922'.

ranged to present the blades to an abrading element in such a manner that like cutting edges will be imparted to all of the blades. In the illustrated embodiment of the invention there is provided a grinding Wheel and a plurality of blade carriers for receiving a plurality of blades and presenting the blades in lthe eanie relation to the grinding Wheel at different portions of its periphery. As illustrated movement of one of the two blade carriers is transmitted to the other blade car-ier by means of connections extending between them.

In accordance with another feature of the invention, the illustrated abrading machine is adapted to operate simultaneously upon a plurality of longitudinally curved cutting blades and to impart to all of them like cutting edges having predetermined edge bevels and profiles. As illustrated the blade carriers are mounted to rock about an axis extending parallel to the axis of the grinding Wheel and all of the blades are supported so that their centers of' curvature coincide with the axis of the grinding wheel. By virtue of this arrangement the blade carrier and supported blade may be rocked, or fed, toward or Way from the periphery of the grinding wheel Without any change insult-ing in the angle of bevel produced by the grinding` operation.

These and other features and advantages of the invention will appear from a consid eration of the following specification and accompanying drawings in Which:-

Figure l is a side elevation of the machine, with a cover plate thereof removed, showing the parts in operative position;

Fig. 2 is a front elevation of the machine partly in section;

Fig. 3 is a sectional plan vieuT of a cutter holding mechanism of the machine; and

Fig. 4l is a sectional elevation on the line nel of Fig. 3.

The machine comprises a vertical column l having at its upper end bearings 2, 2 for a horizontal shaft 3 having` fixed on one end of it a rotary grinding Wheel d. The shaft also has fixed on it between the bearings 2, 2 a pulley 5 which is driven by a belt from a suitable source of power.

Fixed on the front of the column l is a bracket 7 which has formed on ita forwardly and downwardly inclined slideivay 8 on which is slidingly mounted a slide 9..

ylhe slide 9 may he `adjueted eloiig the slidewey `8y hy ineens oil; screw 10 which is rotatably mounted iii e, hearing 11 on the slide 9 and which is threaded through a` lug 12' orn'ied oir the hreelet T. The eerew 1t) ie prevented from moving lengthwise hy :in attached collar 13 und e hand-wheel lll eugag-ing opposite ends ot the hearing 11, the hand-wheelproviding means by which the screw may he rotated.

The slide 9 hes to 1ine-l ou it :i hearing 15 in which ie rotetehly und slidehlgT mounted ai' ehet't 16 parallel to the grintilingl wheel elizi't't rlhe hezirin- 15 is so arranged ou the slide l) thit when the slide is adjusted along;- the .inclined elidewuy S the ehe'lt 16 is moreel radially of the grinding?)` wheel shalt The shzift 16 hee et its` right hend end (Figa e'hlade holding mechenieim hereinet'ter described in detail, und et ite lett hand end peseee through a slot 17 (radiel to 'the exisv o't';` a shaft 3() hereinutter described) formed in e casing 18 und reduced et 19 to recei'vee hloelt 2O which is guided in a groove 21pz'irellel to the Slot 17, 'formed in u cover plete 22 fx d to the casing 18.' The Shett has fixed neer its lett hrend end `:i ,eg-eer Segment 23 which is fastened to the shuitt la); means of two screws 9A, 25:. passing through the huh oit' the segmeht and engaging;v liet luces on the shalt. The segment may he :1dj-iisted about the shaft l); Slnckeiiing one oit the screws and ti gliteniiigA the other.

'lhe slide 9 has projecting upwardly from it fi lug' 26 in which is; fixed, by a screw 2?', e shaft Q8 on which is rocknbly mounted e, Vheiii'iug memher or Support Q9 hiturcuted et its lower end to emhriice the lug' 2G. 'llhe nieml'ier 25) hes at ite upper end horizont hearing in which is slidzihly und rotutehl) mounted i Shufl't 3() which ie parallel o tl( ift "l Shaft 1G und to the grinding wheel eh @ne end of the hearing' ou the inem.

is reducedut 31 to iufovide u hearing lor the upper end ot u loueY liul 9x2, the lower end ot which ie pivotelly mouuteffl ou :i tud -ll tiXedr in the hrecliet 'l'. The liuk 2li? thus pro-- rider, :r'ruipport l'or the upper end ot the hearing; mehiher und guides', this: end el the member about the exis oit the Stud 38 when the Slide 9 if; adjusted alone; the iucliuedelidewey 8. The shalt 30 here :it its right-hhul end il) :i hlutle holding mechanism similar to the hlade holdinii mech'anieni on the riffjht-hentl ol the shaft 16 endet its i pirotelw...)

ly mounted on it le 18 und coven elate 22 ahoife' ,reifer-r o "ed oh the ett-hengel end of the el 3th l., taper piu El', ie nfl Second geef fsegmeutjl. The freer segments 23, are operutieljr connected hjf e' ritcli 36 elidingfly iiiouiiterl in' the cueiugf 19 und* helcl up to the eegmeirts hy u ci r Si' sup portedthy Serefeeo, 38' threedec throu t the (seeing 12% aiidlocked ii adjusted; positioli hy miti; lh Sth Fixed to the geur Segment 35 ie u eeigjnieutul plete ltlwhich its, poetioued between two eegmentel platee fil, l1 tired to the geur segment 2&3 so that it either ot the lo, Bt) is moved eiulwise iu its heur .e other .ehult will move eiuliifiee also.

he noted that il either ol the fillette ie froml the elle@` 1li or tt). the erm ft2 le e liloclt or c: eine' f-llliii whieh ie Ytor u Slule lf.

liormetl :t Slotted gruidewey lfll 'lhe eide is udjueted ulougi the gruidewuy al lhy :i ecrci's ltrotetuhlymounted in :i cup all liXefl ou the lilock or ceeiii2-fflh which screw iiiujj he rotzitetl hy :i hund wheel Ll-tl. '.l`he hlude Ll?) to he :'grouiifl im clouipetl1 hetweeu the elitle l5 sind :if hloeh et) liretl lauf' :i holt 51 'to the :trui l2. 'lhe :slide und lilotl: tlezich here :tormedon them it curved rih 52 to enter the ihnuil grooves iir the oppoete Siders oli the hlude lil. The rihs ure coucou trie with the :wie oft the ehutt 'It or il!) :unl e. 'e ot the seule redini; olf cui' tutore :le the grooves inthe hhulee eo that when the hhule arriere ure swung about theheurings ot' theiiI respective shells, the lllzulee :ueewungr towards or ewziy from the itrii'uliugg wheel :ihout their `ref-:pective time. l-lenee eut-h hlude con he ted iu :i curved het h correspmulineT to its own leugtliu'ise eurruture, tluueluv muinteiuiue' the edge lievel muet-:int ne the hlzifle 'wenn uwe); iu voueeoueiu'e ot repeulml grindinpgs. lhe lougzgitiulihul ehehe ot the lede edge is uleo controlled h i; the ,eulogy i et the hhiffle carrier :irouiul its :wie t lileile ie traversed :zeroes the 'wheel in eoueeegueure olf elitliiie` movement ol' the hhule carrier.

To ueieut duel l'roiu lettino luto the gijiii lwnfija il or ou lo the eereu' flo. :i thih uetel '153 hue ite eutlu thatched to the Slide u, passes zu'oulul :i seuil-circulo 1 portion el tl e cui) fl-"t' ez 1 one mul ot the hlm-l: utlurouiul :iseuil-circuler laloch und or elimine' i i euel ot the hlot'l: or cueillir ttl 're l eikels: -l

the other end to l e lieurii ot the 'lhr protettore comprimi lvetluir we ere outer ed n ln th L-cfl together :it their heuer :nul .il :is ehowii 1u ltuig. il. operutieu et the machine hlotles: l t

hlficetl Jetu'eeh the liloclie 50 uml 455 witl their rear enel feces peeillt) lou

tioned against stop pins 55 fixed in the slides 45 and the blades are then clamped by means of the screws 46, At this time the lower end of the rack bar 3G Will be resting against a stop screw 56 fixed in. the casing 18. If the slide 9 has been correctly adjusted, all the operator then haste do to grasp one of the blade holders or any convenient part of the block or casing` 43 and swii'ig it about the axis of its shaft to bring the blade into engagement with the grinding Wheel and move it to and fro axially of its shaft to traverse it past the grinding Wheel which is of a Width but a small. fraction of the Width of the edge to be ground. The other blade then automatically receives similar movements about the axis of its shaft (through the gear segments 23, 35 and rack 86) and past the grinding Wheel (through the segmental plates 40,41).

rlhe contour of the edge formed by the ground face and the outer face of the blade is entirely determined by the movements towards and from the periphery of the wheel which the operator gives to the articular one of the blade holders he is hold-- ing as he traverses that blade holder to and fro across the Wheel. vWhatever contour he gives to the one blade is faithfully reproduced on the other blade by reason of the gear segment and rack connection and the plate coupling 40, 41. The aspect of the ground faceof the blade relatively to the body of the latter is evidently dependent upon the position of the axis of the shaft 1G or 30, as the case may be, relatively to the wheel axis and obviously identical for both blades so long as the axes of both the shafts 'i6 and 30 are equidistant from the Wheel axis and this is assured by the link 32V and associated parts as more fully described hereinafter. The Weight of the blade holding' mechanisms is balanced. by an spring 57 attached at one end to a' hook 58 fixed to the gear segment 35 and at the other end to a bolt 59 adjustably mounted in the casing 1d.

'.lhe bearing member 29 and link 32 are `so arranged and proportioned that when the slide 9 is adjusted along the inclined guideivay 8, and moves the shaft 16 radially of the grinding Wheel (either to compensate for reduction in diameter of the grinding Wheel due to TNea-r, or to alter the angle or aspect of the ground face of the blade in relation to the body of the blade)n the dial,` distances of the shafts i6, 30 from the grindingl Wheel` shaft remain. substantially equa-l. The angle subtcnded by a lineljoiningY the axis of the shaft?, vvith the axis of the shaft 30 and a line joining this latter axis andthe pin of the upper carrier, all as seen in Figure l, is at all times equal to the corresponding angle at the axis ofthe shaft 16,. This latter condition insures that the tivoblades, when their faces are fully ground to the same aspect, are also of identi# cal length, assuming of course that they haveboth been properly set up to the pins 55, and are therefore suiiiciently identical. to be used in the high speed 'trimming machinei vwithout disturbing the balance thereof. The arrangement and proportioning of the parts' 2.() and 32, above referred to, to secure the results stated, causes a movement of the axis of the shaft 30 having components both radially of the Wheel axis and peripherally. of the Wheel. The peripheral component is compensated for by the rack connection -which effects an appropriate relative rotary movement of the blade carriers.

Although the invention has been described by reference to a specific. machine, it should lze understood that., in its broader aspects, the invention is not limited to the machine selected for illustration.

Having described my invention, What I claim as new and desire to secure by Letters Patent of the United States is l. In a machine for simultaneously grind ing a pair of curved blades, a grinding Wheel, a blade carrier for rocking a curved blade to be ground about its axis of curvature to present it in a predetermined relation to the periphery of the Wheel, and a second blade carrier for rocking a like blade about its axis of curvature to present it in the saine relation to the Wheel at a different part of its periphery.

2. In a machine for sin'iultaneously grinding y a pair of curved blades, a grinding Wheel, a blade carrier for rocking a curved blade to be ground about its axis of curvature to present it in a predetermined relation to the periphery of the Wheel, and a second blade carrier for rocking a like blade about its axis of curvature topresent it in the .fame relation to the Wheel at a different part of its periphery, and connections between said blade carriers for causing movement of one blade holder to be transmitted to the other.

3. In a machine for grinding a pair of blades, a grinding Wheel, a blade clamping carrier slidable on an axis parallel to the axis of the Wheel to carry the edge of a blade to be ground across the periphery of the Wheel, and a second blade clamping carrier slidable on an axis parallel to the axis of the Wheel to carry a lilre blade edge across the Wheel at a different station on the periphery of said. wheel.

' 4. In amachine for grinding a pair of curved blades, a grinding Wheel, a blade car rier having a rock shaft, means for holding; a curved blade on the carrier in coaxial relation to said shaft, a second blade carrier having a rock shaft. parallel to the first rock shaft, means for holding a blade like the first on .Said second carrier, and means' con- CLI lil() necting said blade carriers to transmit rocio ing movement of one carrier to the other.

5. ln a machine tor grinding a pair ot curved blades, a grinding' Wheel, a pair ot tofslide and rock onan axis parallel to the aXis ot` the'Whe-el, means for holding a on lived blade on the carrier with its center of curvature atsaid rocking,v axis, and means for rockingsaid blade carrier on said anis to control the longitudinal shape ot the edge of the blade and maintain the bevel constant.

in a machine ofthe character described, a grinding Wheel, a shattinounted to slide and roel; on an axis psrallelto the airis oi the Wheel, and a. blade holder carried by the shlft'jtor holding" af curved blade ivith s center of ourvatorer at the axis ot the sbatt.

V8. ln a machine ot th-e character described, a 2grindingl ndi-eel, a shaft mounted to slide and roel; on an laxis near the periphery oi the r'iriding Wheel, yielding' means tending to rookthe sliattV in onefdirection, an arm fixed to the shaft, a. tired clamp Vmember ou the arm to `engage one" sident a blade and a movable vclamp member to engage the other side of the blr'i'dejv i 9. in a machine ot' the character described, a grinding `Wheel, a fixed clainpmember, a easing,a movable clamp men'iber projecting through a slot in the casing, means extend` ing into the casing"tormoving-` said movable clamp member,` and a flexible `member attached to said inovable'clainp member and ctfwe'iiing said slot. i

10. ln a machine tor grinding trinnning,` blades in pairs, a. grinder, a pair oi blade arriere, each comprising` a slidable rock shaft, and interengaging plates on the shafts for transmitting sliding movement ot one shaft to the other Without interfering with rocking;` movement. Y

1l. a` machine tor grinding` trimnfiingcurved blades .in pairs, a grinder, a pair ot roch shafts, `means on each rock shatt tor holding" a curved blade with its center ot curvature at the airis ot the shaft, and oonncetions bet-Ween the shafts ,comprising toothed members tot one shaft to t1 .n a. machine tor blades in pairs, a "nder, a carrierf., each con; ai fing a i segment iiXed to each shatt, a i

a lr ngaging said 'gear segments to transmit rochinginoveinent trom one shatt to the other.

tor transmitting rocking ther.

nciaoai points spaced` about i @berg ol tl o Wheel, connections :tor canso he holders t to maintain the saine relation to thx ery oi the wheel, and holders tor en. ifginp; thi en blades to position the edgrcs to be ground in 'lie same relation to the vhecl..

15. in amachine 'tor g indingg' blades in pairs, a grinding` Wheel, a pair ol' parallel bearings, shafts slidable and rochahlo in, said bearings, blade holders al one end oit said shafts, casi enclosing;- thc other end oit the sbat s, and connections in the casli'ip,l Y, '.iveen said shafts :tor causing' both stalling;- and 'rockingv ilioveinents ot one shatt't to be transmitted to the other.

i6. in a` machine ot the (.fharactcr described, a grinding wheel, a pluralii'alv ol blade holders positioned in the saine rela.- tion to the periphery ot' the j jgi'indingrl Wheel at dilierent. stations, ainl ineens 'im' simultaneously adj'ir-tinn the blade holders towards the airis o1" the wheel and inaii'itain inge; said holders in the same relation to the periphery ot the Wheel as the Wheel wears away.

17. ln a machine ot the character described, a incline` Wheel, a pluralityY olf blade holdc's positioned in the saine reltion to the peripheifv ot the a'riudinir wheel at ditlierent stations, rock shafts i'or said. blade holders, means operable by movement single member tor :hijnesting,` said roch shafts towards the axis ot the grinding Wheel, and means tor causing :i .relative rocking; movement oi said ldade holders .in consequence oft said aim.. ment to maintain the ivorlr in the saine on tothe Wheel,

itl. in a machine out the character den scribed, a, grindilgy; n'hfel, a traine. a pair ot blade holders rmsitonod in the same rela-- tion to the peri i, pins on th blade a d`-` ol' the finding` Wheel at differentstation,, shaits tor said blodeholders, a slide tor listing; one oit 'l rock sh s toi is tlm ot the fr" ine; member conne lll) lim

lllii scribed, ci grinding Wheel, at pair ot blade holders positioned in the sume rehitionto the periphery ot the grinding; wheel et dil'erent stations, roel; shafts tor seid blade holders, means for adjusting said rook shafts towards the axis oit the Wheel, and reel; and geur connections between seid rook shafts for C21-using e relative rocking movement et the blade holders as the shafts approach one another in Consequence ol: their adjustment to maintain the Work in the sume relation to the Wheel.

20. ln emzrehine of the eherueter described, a treme, e grindingl Wheel, a slide movable towards und trom the exis oit the Wheel, :L blade Currier having; :t rook shaft journaled in said Slide, e bearing member pivoted to seid slide, e second blade carrier having a, rook ehzrtt journaled in seid been ing' member, and a link pivotully connectingl said roelc shaft With the frame.

2l. In a machine for grinding,` trimming bledee, er blade carrier comprisingl a bod;7 member having en elongated opening` therein, an arm rigidly secured to the body member, zt second arm extending outwardly from the body member and mounted tor adjustment throughout the length ot' the elongated opening therein, and e closure constructed and arranged constantly to cover the opening notwithstanding adjustments of the second erm throughout the length of the opening.

In testimony whereof I have Signed my name to this speecaton. l

JOSEPH GOULDBOURN.

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