Патент USA US2403409код для вставки
July 2, 1946- G. E. STRAHM ‘ 2,403,409 HONING TOOL Filed Sept. 22, 1943 C1 2 Sheets-Sheet 1 27 K . 27 6942/1090 BY Y . 29 INVENTOR. STQAHM, - q (rm/54f, ATTORN EY. July 2, 1946- G. E. STRAHM ‘ ‘ 2,403,409 HONING TOOL Filed Sept. 22, 1945 g 17 29 2 Sheets-Sheet 2 K 5,7 50 51 52 517 - | ’ |_ Il 72 \ / I’ #1 _ I - \ H , a \ a’ 57 ‘1 N I"=J n INVEOR. STEAHM, BY AT T_ORNEY. Patented July 2, 1946 r 2,403,409 UNITED STATES PATENT’ OFFICE ' 2,403,409 ‘HONING TOOL Gaylord E. Strahm, Los Angeles, Calif. Application September 22, 1943, Serial No. 503,320 11 Claims. 1 (01. 51—194) My invention relates to and has for a purpose the provision of a‘device or tool for honing the interior surfaces of cylindrical pieces of work such as engine cylinders, tubes, and the like. ‘ It is also a purpose of my invention to» provide . a honing tool which embodies means for support ing part of a strip of abrasive and ?exible mate rial such as emery cloth, in substantially cylin drical form for insertion into a cylindrical piece of work to hone the interiorsurface of the latter I by relatively rotary movement of the two, and where the abrasive strip is movably supported so that when that part thereof having the cylindri cal form loses its abrasive property by reason of its honing action the strip can be fed lengthwise . to present successively new and unused strip parts to the work being honed, and where such strip feeding is accomplished without'removing the too-1 from the work. 2 In the accompanying drawings: Fig. 1 is- a view showing in side‘ elevation one form of honing tool embodying my ‘invention. Fig. ‘2 ‘is an enlarged longitudinal sectional view taken on the line 2—2 of Fig.1. ' Fig. 3 is a transverse sectional view taken ‘on the line 3-3 of Fig. 2. ' » Fig. 4 is a fragmentary plan view on a reduced scale, of the honing tool with the honing “strip omitted. ' . Fig. 5‘is‘a view on a reduced scale showingin top plan the tool'of Fig. 1, with the tensioning mecha nism for the abrasive‘ strip, and a support for the tool as a whole. Fig. 6 is a vertical sectional ‘view taken on the line 6—6 'of Fig. 5. ' Fig. v"i is a schematic View showing in’ plan an other form of honing tool embodying my inven tion. - ‘ ‘ 1 It is also a purpose of my invention to provide :20 ‘Fig. 8 is a view similar to Fig. 1 showing a third a honing tool embodying a head for holding a form of honing tool embodying my invention. part of the abrasive strip in circular form, which is adjustable to vary the effective diameter of such circular strip part to hone work of di?erent inside diameters and to the degrees required, and. where such adjustment may be effected and main tained without removing the tool from the work and without cessation in rotation-of the Work. A further purpose of my invention is the provi sion of a honing too-l which embodies a strip of 30 ?exible material having an abrasive substance on opposed sides thereof, and a second strip pref erably made of ?exible metal, for reinforcing'the abrasive strip to prevent tearing or distortion thereof, and to facilitate adjustment thereof in _ the successive presentation of new portions to the work. A further purpose of my invention is the pro Fig. 9 is a vertical sectional view taken on the line 9-e-9 of Fig. 8. > Fig. 10 is an enlarged fragmentary perspective view ofv a-modi?ed form of abrasive strip embody ing my invention. ' ‘ 1 Fig. 11 is a View ‘similar to Fig. 10 of another form of abrasive strip embodying my invention. Similar reference characters refer to similar parts in eachof the several views. Referring to the drawings in detail, my in vention in its present embodiment comprises a supporting tube S which, at its right hand end as when viewed in Fig. 1, is either adapted to be ?xedly secured in the tool holder of a lathe for insertion into a piece of rotating cylindrical work to be honed or to be mounted on the spindle of a lathe for rotation in the work where the work vision of a honing tool in which that part of the is stationary. strip of abrasive material which has honing en ~10 On the leading end of the tube S at a point gagement with the work, is arranged spirally to exteriorly thereof, is a head H for supporting a expose a greater area of' abrasive surface to the portion of an abrasive element A in substantial work to increase the honing action. ‘ ly circular form on the tube so that its outer sur Other purposes of my invention are the pro face can have honingengagement with the in vision of an abrasive strip formed of a metal strip 45 terior of a piece of work when the two are ro with a comminuted abrasive substance cemented tated relatively. The head H is expansible to to one side of the metal strip; or a metal strip and render the circular form of the abrasive element a fabric strip cemented to the former, and hav variable in diameter either to hone work of dif ing its exposed side provided with an abrasive :ferent diameters or to hone a particular piece of substance. . l 50 workto a precise'diameter. I will describe only three forms of honing tools, Manually adjustable means is mounted on the three forms of honing strips, and one form of tube 8 for e?ecting expansion of the head H, as reinforcing strip, each embodying my invention, well as to maintain any precise expansion there and will then point out the novel features thereof of. This meansmay include complemental cams in claims. 55 C, and C1 movable axially in .opposite directions 2,403,409 3 4 on the tube, and in one direction or the other to effect expansion of the head H or to allow con mediate portion H can be wrapped around the head I-I, its ends extended inwardly between the traction thereof. The head H may comprise a band, preferably inturned and rounded ends 48 and 4|.of the sec tions l5 and I8, and then through a slot 43 into the tube S. At this point the two lengths 44 and 45 of the strip are twisted in opposite direc tions about a pair of guide posts 46 ?xed in the tube S and inclined and tapered so that as ex tended therefrom, the two strip lengths are dis of spring steel, which is made up of a large sec tion l5 and a small section l6 in order that the requisite uniform expansion may be attained by the band as a whole. It will be understood, how— ever, that the band may be in one piece, but when so made‘uniformity in expansion is not at 10 posed at right angles to the cylindrical strip por tion I1. From here the strip lengths are ex tainable. tended longitudinally within the tube to project Both band sections l5 and I6 have smooth out_ from the right band end thereof where they are er peripheries on which a portion I1 of the abra accessible for manipulation, by hand, or for as sive element A is supported in substantially cir cular form, the element being con?ned thereon 15 sociation with a mechanism for tensioning the against accidental edgewise displacement by ribs l8 on the edges of the sections. " On their inner peripheries the band sections are formed at spaced intervals with transverse strip A and for feeding it lengthwise to present new sections thereof to the work being honed. In the present instance, this mechanism is shown in Figs. 5 and 6 as comprising a cross ?ns 19, the inner edges of which are beveled to 20 head 58 secured in the right hand end of the tube S by screws 5|. One end of a rod 52 is form reversely disposed cams 20 and 2| which secured in the cross head against removal and engage the cams C and C1, respectively. These rotation, and so as to extend axially from the cams C and C1 are in the form of split annuli sleeve S. The otherend of the rod 52 is secured and are interposed between the head sections l5 and I6 and the tube S so as to be slidable in re 25 in a clamp 53 on one end of a support 54 which may constitute the tool holder of an engine lathe. lation to the cam ?ns l9, and to thereby cause Adjustable lengthwise on the rod 52 and se their cam faces 22 and 23 to coact with the edges cured in any adjusted ,position by a set screw 55, 28 and 2| in effecting radial expansion of the is a sleeve 56 to the opposite sides of which are head H as a whole. The head sections l5 and iii are preferably 30 secured, as by welding, a pair of plates 51 and 58 constituting a frame. spaced one from the other, and mounted on the tube S by pins 24, 24 and 25, 25, secured to the inner sides of the sections l5 and I6 and slidable A strip supply reel 68 is mounted between the upper ends of the plates 51 and 58 on a belt 6|, the latter being rotatable in the plates, and the in sockets 26, 26, and 21, 21, ?xed to the outer 35 reel being secured thereto by a pin 62'. At its periphery of the tube. threaded end the bolt is provided with a nut 63, The cams C and C1 are ?xed on the inner ends while extending through the bolt head is an of sleeves 28 and 29, respectively, and these operating crank 64. sleeves are arranged one within the other and Adjacent their lower ends the plates 51 and concentric of the tube S, with free axial move ment to effect the required adjustment of the 40 58 are provided with suitable openings in which a strip'receiving reel 65 is rotatably mounted. This reel receives a stub shaft 66 having a nut 61 on'one end thereof, and an operating crank 68 on the other. The reel is secured to the shaft by pin 69 so thatthrough'rotation of the crank 68 the reel can be rotated. Integral with the Axial movement of the sleeves 28 and 29 simul reel is a ratchet wheel 18 the teeth of which are taneously and in opposite directions may be ef adapted to be engaged by a pawl 1| pivoted on fected by a manually rotatable collar K sur the sleeve 56 as at 12 to lock the wheel, and con rounding the outer ends of the sleeves, and hav ing one portion 30 engaging the inner sleeve 28 50 sequently the reel 65, against rotation in a counter-clockwise direction as when viewed in with a right hand screw thread 3|, and another cams. In order that the pins '24 and 25, and the socket 26 and 21 may not interfere with such ax ial movement of the sleeves, the inner sleeve 28 is formed with slots 28a and 281) (Fig. 4), while 45 the outer sleeve is provided with a slot 29a. portion 32 pinned to the portion 30 and engag Fig. 5. . As will be seen in Fig. 5, the abrasive strip A is adapted to be wound uponthe supply reel 6|] with ing the outer sleeve 29 with a‘ left hand screw thread 33. Thus, by rotation of the collar K in one direction or the other the sleeves are fed in 55 its‘ inner end extended into a suitable slot 60a (Fig. 6). The free end of the strip is extended opposite directions to move the cams C and C1 from the reel inwardly through the tube S, around toward or away from each other to expand or the posts 46 and head H, and then rearwardly and contract the head H. outwardly through the tube S, 50 that it can _ The collar portion 38 is confined on the tube be wound about the receiving reel 65 and secured Spagainst axial movement by the provision of an 60 thereto by extending the free end into a suitable annular tongue 34 ?xed on the tube and engag groove 65a. ‘It will be understood that the pawl ing a ring 35 within a groove 36, the ring being 1| permits free rotation of the reel 65- in a clock made in two half sections as shown in‘ broken wise direction only, while the reel 68 is normally lines in Fig, 2 to allow of its application to the free to be rotated by the crank 64. However, 65 tube. Both the ring 35 and the collar sections once the abrasive strip has been arranged as de 30 and 32 are embraced by a sleeve 31 the ends scribed the reel 68 can be locked against further of which are bent inwardly to form. annular rotation by an adjustment of the nut 63 inwardly ,?anges 38 and 39 which tightly embrace the col lar section 32 and the ring, so that rotation of the sleeve effects rotation of the collar and ring. ' The ‘abrasive element Amay be in the of a strip or ribbon of cloth having both thereof coated with a suitable abrasive stance such as particles of carborundum. form sides sub This "abrasive strip is of such length‘ that its inter- " on the bolt to drawthe plates 51 and 58 into tight engagement with the edges of the abrasive strip. With the abrasive strip arranged as just de scribed su?icient tension may be imposed on the stretches 44 and 45 thereof to draw the circular portion H of the strip into snug engagement with the head H, by moving the sleeve 56‘ out— 2,403,409 '6 multaneouslyunwound from a reel 13, and sep arately rewound ‘upon reels ‘l4 and 15, it being understood that suitable mechanism similar to that shown in Fig. 5, for actuating the reels and locking them against rotation following adjust ment of the two strips, may be provided. In Figs. 8 and 9 I have shown an embodiment of my invention in which the honing portion of the abrasive strip A may be spirally wound ‘on the expanding head H, in order to present to the wardly on the rod 52, and then securing the sleeve in this position by means of the set screw 55, or by rotating the reel 60 in a counter-clock wise direction, while the reel 65 is locked by the pawl. In practice, whether the honing tool rotates and the work to be honed is stationary, or the work rotates and the tool is stationary, as is ef fected by the structure shown in Figs. 5 and 6, ?rst the tool and the work are moved relatively axially. to cause the tool to be inserted into the work to be honed a larger surface area of abra sive material. The structure of the head H, the cams C and C1 for expanding the head, and the work so that the strip portion vI‘l can have an abrasive contact with the inner wall of the work, and thus under relative rotation of the two hon ing of the wall can be e?ected. By rotation of means for adjusting the cams, are all identical to the form of honing tool shown in Figs. 1 to 4, ex cept that the expanding head and cams are of the collar K in the proper direction the cam C and C1 can be moved away from each other to increased length " to accommodate the convolu expand the head H and thus increase the di ameter of the strip portion I‘! to compensate for tions of the abrasive strip. However, in order that wear of the abrasive substance and thus increase . the expanding head, the posts 16 and ‘I1 corre; sponding in function to posts 46, are arranged as shown in Fig. 9, and thus the parallel stretches of the abrasive strip can be extended axially along the abrasive strip may assume a spiral form on the honing action to attain the desired internal diameter of the work. It will be understood that during this cam adjustment the sleeve 56 can be moved inwardly on the rod 52 to compensate for the increased diameter of the strip portion I1, and from the tube ‘S. Referring now to Fig. 10, I have here shown a modi?ed form of abrasive strip wherein the abrasive substance 18 is applied directly to one or one reel or the other can be rotated in the ‘ proper direction to increase the length of the abrasive strip between the reels. face of the metal strip M, thereby avoiding the As the honing action proceeds the abrasive property of the strip portion l1 ?nally becomes use of the abrasive strip A. 30 nil, so that it is necessary to replace the worn por tion with an unused portion. This can be readily ' ' > ' In Fig. 11 I have shown another form of abra sive strip wherein the fabric strip A has abrasive material 18 on one side, while the other side is accomplished by unwinding the strip from the without abrasive material and is adapted to‘ be reel -60 and rewinding it ‘upon the reel 65. cemented to one side of the metal strip M. Thus _ ' Although I have herein shown and ‘described only three forms of honing tools, three forms of honing strips, and one form of reinforcing strip, each embodying my invention, it is to be under it will be understood that, this lengthwise adjust ment of the strip can be repeatedly performed to successively present to the work new portions of the strip until substantially the entire strip has stood that variouschanges and modi?cations may been used. An added function of the structure illustrated 40 be made therein without departing from the spirit of my invention and the spirit and scope of the in Figs. 5 and 6 is, that should the head H jam appended claims. within the work to such an extent that the ro tating work sets the whole tool into rotation, the holding action of the clamp 53 in respect to the rod 152 is overcome to allow the entire tool to ro I claim: 4 3 an eXpansi-ble head on the outside of said sup tate with the work and thereby prevent any pos sible damage to the abrasive portion I‘! of the strip, or any other part of the tool. , 1. A honing tool comprising a tubular support; . As previously described herein the abrasive strip A has abrasive material on opposite sides thereof. The abrasive material on the outer side, which is presented to the work at the circular portion I1, operates to produce the honing action. The abrasive material on the inner side of the strip, which is presented to the outer surface of ' the head H, operates to prevent any slippage of the strip on the head during the honing opera tion, and holds the strip portion in circular for port; and guide members in said support so con structed and arranged that two connected lengths of ?exible and abrasive material positioned longi~ tudinally within said support, can be extended radially outward of the support and around 'said head to cover the latter to provide a substantially circular abrasive medium for said head; comple mental cams between said head and said support movable lengthwise of said support to ei‘fect'ra dial expansion of said head; sleeves secured to said cams for lmovement lengthwise on said sup port; and a collar threadedly engaging both of said sleeves so that by rotation of said collar said cams will be moved in opposite directions to ex mation to prevent distortion or tearing thereof. In Fig. 7 I have shown a modi?ed form of GO pand said head. 2. A honing tool comprising: means for sup honing tool in which is embodied a thin strip M porting a portion of a length of ?exible and abra of metal such as spring steel or shim stock, which sive material in substantially circular form within is preferably the same width as the abrasive strip A. This metal strip is provided for the purpose a cylindrical piece of work, so that by rotation ‘of of reinforcing the abrasive strip to prevent pos the work and said material relatively, the inner sible tearing thereof and toiacilitate adjustment surface of the work will be honed; and means of the abrasive strip lengthwise in the successive correlated to the ?rst mentioned means and ax presentation of its portions to the head H in the ially removed from said ?rst-mentioned means by manner previously described. Here again the which said material can without removing it from abrasive strip has abrasive material on its inner ~ side as well as on its outer side so as to bite into the metal strip M and thereby cause the two strips to move lengthwise together in e?ecting adjustment of the abrasive strip. As shown in Fig. 7, the strips A and M are adapted to be si the work, be adjusted lengthwise of said support ing means to present successively to the work new portions thereof as the succeeding portion loses its abrasive property. 3. A honing tool comprising: a tubular sup port; a head exteriorly on said support; a ?exible 2,403,409 7 8 metallic strip; a second flexible strip having abra sive material on opposite sides thereof; said strips extending around said head, with the metallic arranged at such‘ an angle to‘ the axis of said support that a strip of abrasive‘ material-can be extended in a double length through said support, strip between the head and the second strip, then the two lengths respectively around said mem radially inward into said support, and its end projecting from one end of said support for access to pull one end of the metallic strip, where by the second strip can be‘ adjusted about said bers and outwardly through said slots, andthen around said head, and said strip moved length part of said support positioned exteriorly of the cluding complemental cams adjust'ab'le'inv oppo wise from a point exterio-rly of said support to feed the strip around said head; and a pair of head ‘ reels at one end ofsaid support and about which 4. A honing tool comprising: a support; a strip 10 the ends of the strip are adapted to be wound, of abrasive material; means on said support for so that by rotation of ‘one of said reels the strip holding a part'of said strip in spiral :form within can be moved as aforesaid. Y a tubular piece of work to have honing engage 8. A honing tool, comprising: a tubular support ment therewith when the two are rotated rela~ having a slot in the wall thereof; a head around tively; and means carried by said support and 15 said support and having a slot registering with axially removed from said ?rst-mentioned means the slot of said head; guide members in said sup for adjusting said strip lengthwise of said support port adjacent the slot therein and arranged one and in relation to said head to present to the lat in advance of the other along said support and ter a new part of said strip in spiral form to dis at angles to the axis of ‘said support so that a place the other part strip when it loses its abra 20 strip of abrasive material can be extended through sive property. _ said support in a double length with each length 5. A honing device, comprising: a support about one of said members, and then outwardly adapted at one end to be extended into a piece through said slots and around said head in a of work to be honed; a head on‘ said end about spiral form; and means operable from a point which the intermediate portion of a strip of flex 25 exteriorly of said support for moving the strip ible abrasive material is adapted to be wrapped lengthwise to- feed the later around said head. to have-honing contact with the interior of the 9. In a honing device: a support; a supply'of a work, extended inwardly of said head and said strip of abrasive material in ‘said support and support, and then outwardly from said support looped about said head;" and means on said and the work; and means associated with that 30 support for adjustably'expan'ding said head, in-__ work and actually removed from said head for site directions axially of said head.“ ' ‘ ' feeding said strip through said support and around - 10. In a honing device: a'support; a head on said head to present as required unused parts of said support, a supply of a strip of abrasive mate said strip to said head during the honing opera rial in said support and looped about said head; tion. means on said support for adjustably expanding 6. A honing tool, comprising: a tubular sup said head, including complemental cams adjust port having a slot in the wall thereof; a head able in opposite directions axially of said head; around said support and having a slot registering and rotary means on said support for simultane with the slot of said head; guide members in said 40 ously 11. adjusting A honing tool'comprising said cams. a' tubular' support i " support at opposite sides of the slot therein and arranged at such an angle to the axis of said having an opening therein; an expansible head support that a strip of abrasive material can be on‘ said support positioned in relation to said open extended in a double length through said sup ing so that a strip of ?exible and abrasive ma port, the two lengths respectively around said terial can be extended from said opening and members and outwardly through said slots, and around said head; elements movable on said sup? then around said head, and said strip moved port within said head; cam surfaces on said head lengthwise from a point exteriorly of said sup and said elements coacting when said elements port to feed the strip around said head; and means are moved in opposite directions axially,’ of said operable from a point exteriorly of said support 60 head, to expand said head; and companion mem for moving the strip as aforesaid. bers positioned in said support so that the strip '7. A-honing tool, comprising: a tubular sup of material can in a double length be extended port having a slot in the wall thereof; a head inwardly from said opening and‘longitudinally around said support and having a slot registering within said support to a point exteriorly of one with. the slot of said head; guide members in said 55 end of the latter. ‘ support at opposite sides of the slot therein and GAYLORD E. STRAHM.