Патент USA US2405467код для вставки
Aug. 6, 1946. H. H. TALBOYS 2,4054e37 ‚ INTERNAL GRINDER AND POLISHER Filed Jan. 28, 1943 - 7 Sheets-Sheet l Jizmwzfor Ä’enry? Z&Zßvyä @ M.l'ffazweys’. M Äug._ 6, 1946. H. H. TALBOYS INTERNAL GRINDER AND ZPOLISHER Filed Jan. 28, 1943 _ 7 Sheets-Sheet 2 .N .iätorzzeysf 15 ä v 9 ~14‚ H. H. TALBOYS ms,“ INTERNAL GRINDER AND POLISHER _Filed Jan. 128, 19.43 v ‚7 Sheets-Shee’c 4 Äug‚ ß, 1946, H. H. TALBOYS 2,405,467 INTERNAL GRINDER AND POLISHER Filed Jan.‘ 28/, 1943 7 Sheets-Sheet 5 72 Aug. 6, 1946.‘ H. H. TALBOYS INTERNAL GRINDER AND POLISHER Filed Jan. 28. 1943 7 Sheefcs-Sheet 6 Aug. 6, 1946. ~ H. H. TALBOYS ‘ 2‚405‚457 INTERNAL GRINDER AND POLISHER Filed Jan. 28, 1943 ‚ ' 7 Sheets-Sheet 7_ 42 .2? ß 37 “ w „»y __ 50 63 50 @MM ßffazweys ~ Patenten! Aug. 6, 1946 UNITED STATES PATENT OFFICE 2,405‚467 INTERNAL GRINDER AND POLISHER Henry H. Talboys, Milwaukee, Wis., ass‚ignor_to Nordberg Manufacturing Company, Milwaukee, Wi’s., a corporation of Wisconsjn Application Januar); 28, 1943, Serial N0. 473,811 20 Cla-ims. (C1. 51—34) 1 2 Th1s invention relates 110 an improvement; in Figure 9 is a section along the line €!——9 of internal grinders anal polishers anc1 polishing Figure 3; methods and has for one purpose the provision of an internal grinder e?’ective to ?nish cy1in drical inner surfaces. Figure 10; One application of the invention is to polish the interior surface of tubes; pipes anti the like. Another purpose i-s the» provision of an im proved means and method for truing up inner Figure 12 is a, section along the 1ine I 2--I2 of Figure 10 ; Figure 13 is a sid_eelevation of ‘a grinding seg generally cylindrieal surfaces, smoothing the 10 surfaces, grinding down a.ny inequalities and in general ?nishing the surfaces to form a, substan tially true cylinder. ~ Figure 10 is a plan view of the grinding head; Figure 11 is a section a10ng the line II—-.—I Lot ment; ‘ Figure 14 is a, plan view of a grinding segment holder; . ‚ Figure 15 is a section on an enlarged scalaalong the 1ine I5——I 5 of Figure 1; Another purpose is the provision of an im Figures 16, 17 and 18 ~ illustrat_e details of a proved interior grinding means including a._ power 15 slight variation from the corresponding struc plant and a grinding element 01‘ elements Which tures shown in Figures 3, 6 and- 9 respectively. may be bodily conveyed as a_ unit axially along Lilie parts are indicated by 1ike charactel‘s the member to be polished. throughout the speci?cation and„ draw-ings. Another purpose is the provision cf improved Referring to I;he drawings and initially pri means f0r guiding and supporting such unit. 20 marily. tq»Figure 1, I is any suitable supporting Another purpose of the invention is I;he pro? surface, ?oor or the 1ike. The structura supporh. sion of improved means f01‘ adjusting the thrust ed on the surface includes generally the fo1low 01° the grinding means against an inner surface. ?ng elements: A generally indicates a aupport» Another purpose of the invention is the pro ing structure f0r the feeding means for the power vision of improved means for disposing of dust 25 anal grinder unit below described; B indicates a created by the grind.ing o1‘ ?nishing operation. supporting device-for the motor and grinding unit Another purpose is the provision of improved when not in use; C indicates generally, support feeding means and feed limiting meang for such ing meansfor the tube or other element, the in a device. terior of which is to be ‚grouncL ?nished, or pol Another purpose is the provision 015 an im 30 ished. provad grind.ing head or element. Referring ?rst to the structure indicated as -A‚ Another purpose is the provision of an im it may be formed in a wide variety of Ways but: proved means for adjusting the centrifuga] I illustrate a plurality. of uprights 2 connected thrust of a rota‚ry grinding element. by longitudinally extendir;g angles 3. The angles Other purposes will appear from time 130 time 35 or the uprights or both may be connected by throughout the speci?cation and claims. transversely extended angles 4. Mounted on the My invention 15 illustrated more o1‘ lass di transverse membem ß and shown in some detail agrammatically in the accompanying drawings, in Figures 3, 4 ancl 5, arg a pair cf 10ngitudinally wherein: eXtendingangles 5‚„the lowe_r ?_anges o-f which Figure 1 is a side eleva‚tion with parts in ver tical section; Figure 2 is a section on an enlarged scale along the line 2-2 of Figure 1; Figure 3 is a, partial vertical longitudinal sec tion on the same scale as Figure 2; ‘ Flgure ‘1 i‘s a section along the 1ine l5—-4 of Figure 3; ‚„ Figure 5 is a section along the line 5—-5 01f F‘igure 3; Figure 6 15 a section along the 1ine 5—8 of Figure 3; Figure 7 is a partialplan view of the carrier for the motor unit; Figure 8 15 a- section along the» 1ine 8-8 of Figul‘e '7; 44 approach and are divided by a space asat 6. Slidable in the channel thus provided by the angles ‘3 i‘s a.ny suitable transversely extending thrust member 1, herein shown as- a hollow ele ment of recta‚ngular cr0ss section. II: is provid. ' ed with a downwardly. extencled rack 8, which rides in and iS guicled longitudinally by.the ap erture 6. 9»indicates a transverse pin Which may be employed as a stop. If desired‚ a plurality of apertures 9a may be provided f0r permitting ad justment of the_styop‚ if such adjustment is neo essary. The rack is driven by-any suitable pin i_on I0, mounted. on a shaft II, in any suita.ble bearings I2. The shaft I I ma‚y»carry a sprocket I3, about whichpasses a chain _or belt I4, ‘which 55 in turn passes about a sprocket I5, driv‚en by a 2,405,467 3 friction drive Hi. i‘! is any suitable gear re ducer and I8 any suitable source of power such as an electric motor. II: will be understood tha'o the detailg do not form part of the present invention and What is necessary is sonne means for driving the pinion 4 work along the entire length of the work in re sponse to the rotation of the pinion I0 and back ‘ through the work in the opposite direction and into the shell 25. In order to support the motor anal grinder unit du1‘ing this excursion, I provide a supporting frame including three longitudinaliy extending frame elements 31 ‚ 32, and 33. 'I‘he three frame elements are connected by two or more circumferential ring elements 34. The lon ever, that Whei‘e a series of successive passes is made in order 130 treat an article of a given 10 gitudinal elements 3I and 32 may be ?xed to the rings 34 by welding o1‘ otherwise. Preferably one 1ength, where lt is desired to have ‘alle passes ex cf thg longitudinal elements herein shown as 33 tend through a. uniform distance at each pass, it is mounten movably radially in relation to the may he advantageous to provide any suitahle rings 34 and yielding means are provided for automatic reversing means for reversing the drive. thrusting it radially outward toward the inner at the end of the pass. Since such meansars surface of the shell 25 01‘ the work D. I illustrate, well known‚ they need not‚ -be indicated in detail. for example‚ guiding pins 35 surrounded by com 20 illustrates any suitable rolle?!‘ means for hold pressed spring 36. The guiding pins are C011 ing the rack 8 down against the pinion H. 2I is I9 anal thereby moving the rack 8 alternately in opposite directions. It Will be understood, 110W nected to the element 33, for example by angles a stop plate mounted acljacent; the right end of the unit A. Referring 110 the positiou of the parts 20 31, and nass through ?xed abutments 38 on the rings 34. Axial movement of the member 33 is shown in Figure 1, the stop plate 21 may be en prevented for exarnple by any suitable stops or gaged by the pin 9 ab the end of the stroke in one bars 38, whichywith the angles 31 act as‚ move ment limiting means. In order to space the rings sponding pin ab thaend of the opposite strok_e in another direction. I illustrate, for example, the 25 34 axially apart, I also provide br&ces 40 located adjacent the member 33 and provide the sti?en pivoted links 22 carrying a stop member 23 at direction or it may be engaged by some corre ing which 33 cannot give because of its movable their end. In the position in which the parts are relationship With the rings. shown in Figure 2, it stops the grinding element; Any s_uitable means may beemployed for sup in the pos'ition in which ii; is shown in Figure 3‚ the grinding elemen’c is approximately inside, the 30 porting the above described structure Within the work. If the links 22 are rotated into their oppo si’se position, then the stop 23 will not be effective unti1 after the grinding element has been entirely withdrawn from the work. 'I‘he friction connec inner faces of the member 25 and the ‚work B re spectively. I show for example, wheels or rollers 4 I. The member 3I is shown in Figure 3 as carry ing four of these rollers. In the stru_ctu'n; shown tion I6 permits slippage when any of the stops en 35 in Figures 3, 6 and 9, these bottom rollers, mount ed on 3l, penetrate the slot 30 of the ele’ments 29, gage the‘plate 2l. This protects the motor from anti thus prevent rotation of the frame formea by burning mit. the elements 3I, 32 and 33 and the rings 34. I also Controlled 0r moved by the element 7 and its illustrate rollers 4I at each end of_the members rack 8, in response to the rotation of the pinion II), is the motor and grinding unit below de 40 32 and 33, these rollers abutting against the in ner surface of the members 25 and D. I1; will be scribed. The motor and grinder uniiz, when not in observed as in Figure 3_. that the cut-away por use, is housed in a supporting and aligning‘ Shell t1ons 21 are out 0f line with the paths of these 25 which forms part of ’che structure B indicated rollers. in Figure l. This Shell may be supported in any In ’che form of Figures 16, 17 al‘ld 18, the lower suitable manner on a plurality of uprights 26; vIt rollers 41a are mounted on the element 3l, lat is also, provided with a plurality of cut-outs or erally out of line with the sich 39 of the element open spaces 21, which permit inspection of the 29. Thus all of-the sets of rollerg as shown in motor and grinder unit and gives access to the Figures 16, 17 and 18‚ engage the inner faoe 01t‘ the motor and grinder when housed in the Shell 25 anal also permits inspection todetermine proper . work or of the member 25 and are not relied upon for preventing rotation of the structure. I pro alignment between the grinder unit and the work supported on the element C. 28 are any suitable circumferential reinforcing rings. ‘I'he shel1 is provided with a bottom piece 29, havi_ng a lonsi— tudinally extending slot 30. ‘I‘he shell terminates a1: its right band end, referring to the position cf the parts shown in Figure 3, in a plane perpen dicular 130 the axis of the Shell, which permits a close approach of the opposed edge of ‘ehe work v1de instead a feather or key 133, mounted in any suitable manner on the member 3I, and adapted to penetrate the slot 33. This penetration pre yents any rotation of the motor and its support mg carrier and has the additional advantage of tending to scour out dust, and shavings from the slot. Ir, 15 thought to be advantageous to have the rollers directly engage ‘ehe cylindrical inner (in surfaces. An accumulation of chips anal dusb in inclicated as D. 7 the s1ot may be disadvantageous, and may cause It will be understood that the interna1 diame— irregularities in grinding, unless scrapers or an ter of the shell 25 is substantially the same as air j et are employed to keep the slot c1ear. This the intern2l diameter of the work D and also that is unnecessary in the structures of Figures 16 to some means are preferably provided in connec tion with the W01‘k D for continuing the slot 30 65 18. Ii, will also be understood that- if the work is not itself provided with a slot, Other means or its equivalent. As an example, the whole de may be provicigd to prevent rotation of the body vice may be employed in ?nishing the interior of a. 0f the motor anal support, such 215 a rigid shaft tubular element formed by rolling a sheei; of meta1 centered on the motor. together so that the opposite longitudinally ex tending edges of the sheet approach but do not 70 Mounted within the frame thlls formed and supported by the rings 34, I illustrate any suit meet. The space between the approaching edges abl<z’motor 42, one end of whioh is sea’ced in the provides an aperture aligned with and corre right i‘ing 34, referrlng to Figure 3‚ the other sponding to the_slot 33. It will be understood fahat being engaged anal held in position by any suit the below described motor and grinding uni1; may be moved freely out of the shel1 25 and into the 75 ab1e clamp plate 43. Any suitable means may be 2,405,467 5 6 empbyed for cooling the.motor. For example, a piece 81 With ‘a s10t:82 in alignment with the.cor— responding members 29 and 30 0f the shell 25 as shown in Figure 9. 83 inclicates any suitable semicircular clamps which may be clamped down sup’plemental fan 44 or under some circumstances, the device may be coupled into any suitable suc tion system. Under general circumstances, it is advantageous to employ the integral fan 4‘4, as 5 in any suitable manner as by bo1ts 84. The struc ture-thus provided permits the ?rm locking (‚f the shown in Figure 3, operated by the same motor workbetween the clamps 80 anal 83 Withthe op which rotates the grinding head structure. I il posite edges of the work cylinder D abutting lustrate for example in Figure 1, the suction duct against the upwardly extended longitudinal 45 in communication with the housing 45 with a. transparent inspection window 41 and a con 10 ?9.nges 85 which extend a.long each side of the slot 82. ’ necting cylinder 48 approaching closely adjacent’ It’ will be understood tha.t this particular work the end of the work D, er if desired, slipped over detail and detail of work support is not of itself the end 0f the work D. Thug all dust created by essential. For example, completed tubes may be the operation of'the device is withdrawn from the area of the work am]. ca.rried o?. However, under 15 operated upon in which means associated with the tube itself a.re employed for immobilizing the mogt circumstances, I prefer to provide means for opposite’ edges of the bottoni slot. With some ca.using aid to pa.ss about the motor 42, obtaining modi?cations, the structure ma.y be employed to the double result of cooling the motor and re polish.or ?nish the interiors of tubes having no moving dust and grindings from the Working area. The tan 44 provides one method for air cooling 20 break in the surface; . It will be understoool that the elements B anal anal dust disposal. It will be noted that the C are so‘ proportioned that wheu the work tube grinding head below described may also be pro D is clamped in. position, it is properly aligned vided with fan means as will later be seen. Referring next to the grinding structure proper, With the shell 25 a‚nd the motor and grinding unit moves re.dially out’ of the shel1 25 into the work the motor shaft 42a is snrroundecl by a sleeve 45 tube D and back through the work tube D into keyed 0r otherwise ?rmly secured thereto. 49a, the shell 25; It Will be realized that whereas I ha.ve shown otherwise secured to the sleeve 49. Referring for example to Figures 10, 11 and 12, I illustrate a and described an operative device, still many plurality of radial a.rms 50, four extending from 30 changes might be made in the size, shape, ‘ar rangement anal disposition of parts without cle— each of the hub plates 49a, each set of armg sup parting materiallyfrom thespirit of my invention porting a. ring 5I. The arms 50 ma.y include f‘a‚n va.nes 52; the purpose of which has'already been und I wish, therefore, that my showing be taken 49a, indicate a pair of hub disks pressed on or discussed. The‚rings 5I de?ne between them a; as in ‘a. large sense, illustrative o1‘ diagrammatic. spa.ce for two or more shoes or Segment holders, 35 The use anti operatioi1 of my invention are as ‘generally indicated at 53. The inward moVementl 015 these segmentholders towara the axis of the head is limited by inwardly extending ?anges 54 follows: I provlde mea.ns for a.nd a method of ?nishing interior cylindrical or partly cylindrical surfaces. 011 the opposite rings 5I. Each segment holder My invention is weil adapted 130 ?nish interiors includes an arcuate bottom 1313‚t6 55 with a ra 40 of more or lass elongated cylihdrical members, dially inwardly extending ?ange 56 and side plates such as pipes, conduits, a.nd the lik@‚ It ma.y be 51 terminating in inwa.rdly extending ?anges 58. employed to ?nish interiors ofcylindrical tubes 01‘ The ?ange 55 has pivoted thereto a link 59, the t0 ?nish generally cylindrical' inner surfaces, opposite end of which is pivot€d to a lever 69' which extend about less than 360 degrees of arc. which with its associatzed— 1ever 6I forms a‘ bell ~ It may be employed to ?nish interiorsof aperu crank lever structure Divoted at‘ 52 to the rings tures in members, the exteriors of which are 5l. Adjustable on the lever 61 is a counterweight square, rectangular or. in general, other than 63. 64 is a. spring extending from the unter end cylind'rical. In the particular exempli?cation of of the lever 51 to the hub Platos 49a where, if de 1ny invention herein described and shown, I move sired‚ it may be secured to a. pin 65 extending be» - a motor anti grinder unit‘ axially along the ele tween the hub plates. At the forward end 0f- the ment to be ?nished. During the axial movement shoe are lugs 66 to which a.-re pivotßd a»]ink 67 of the unit, the motor rotates the head in such piVoted in turn as at 58 to the»rings 51. It may’ manner es to cause the abrasive segment 15 to be adva.ntageous to provid'e acounterweight 59 at thrust centrifugally outwardly agalnst the inner the forward end-of the link 81. The arrow inFig-» lface 0f the work D. Centrifugal force is also ure 12 indicates thedire?’ßi0n of rotation of the e?ective to urge the counterweight 63 generally above described heacl. 10 indicate removable radiall‘y outwardly and there is a balance of two abrasiVe or polishing Segments which are- pro» ‚ f0rces. By adjusting the counterweight 63 in relation to its pivot 52, the centrifugal thrust of the shoe sides 57. The rear end of the shoe is 60. the abrasive segment ‘i'll against the inner fa.ce of open to permit the insertion of the seg'ments‘7ß‘ the workoan be adjusted. The Segments 70 and. and a;ny suitable retaining plate ‘H could be em-» the shoes in which they are mounted, are thrust ployed. It may, for example, be slipped into slots; outwa.rdiy in such fashion that centrifugal force 12 luthe ?anges 58. The plate ‘H may be locked« permits them to adjust their position in relation in itg inward position for example by the pin 13 7~ to tl'ie inner fa.ce of the work. For example, anal which passes through an aperture 14 in the sho‘e referring to Figure 12, the segment‘l? and .its bottom plate 55. supporting shoe are connected by the interme Referring to the work and the work support, C diate link 57 to the rings 5I aIs at 68‘and. the indicates generally any suitable support or rack 1ink 59 provides a. loose connection Witli a center for the tubular work D. It includes for. example E2. Thus the subjection of the shoe‘and se‘gment‘ any suitable vertical supports 18 which may sup to centrifugal force resultg in a generally uniform port longitudinal extending angles ‘I9. Secured thrust_ of all parts 0f the outer surfämes 0f the seg to the angles are any suitable upwardly open, ment' against the inner surface of the work.~ semi-circular supports 80. At the bottom of the It will be understood, of course, that the members 80 15 a longitudinally extending grooved' counterweight 53 is so manipulated that the cen_ Vided with channels 10a to receive flanges 58, o1‘ 2,405,467 7 8 trifugal thrust of the segment 70 will alwa.ys ex In connection with adjusting the counterweight 63 it is important both for controlling the' (‘Lut ceed the centrifugal outward thrust of the coun terweight since otherwise there would be no grinding, ' In the use of the device, I ?nd that it operates not merely as a polishing or ?nishing device but as a truing device. For example, if there are pr0jections 0x- unevennesses in the inner wal1 of the work, these unevennesses tend to be planed or ' ting pressure and for compensating for ‘ehe horse power available; F01‘ example, where a, relatively smal1 motor is- used in a smal1 taube, the thrust cannot be asgreat as in the event a large motor is used, or a.s in the event that the power source is locat€d outside of the Bube. ' ' It Will be also understood that where I employ ground down With lconsiderable rapidity.‘ Inert-ia 10 the term “grinding element,” I wish it to be in prevents a, certain adaptation of the shoe ‘I0, 130 terpreted as of su?icient breadth to cover any lozal reductions in radius and thug inward pro suitable grinding orv p'o1ishing element, polishing jections or unevennesses tend to' be planed er pa'ds or the like, and in general, any element ground off. Experience indicates that not merely operating in any sense abrasively against the minor irregularities or sudden projections -are 15 suriace of the work. taken out but tha_t the interior of the work is It will‚also be understood that; where in the ground down 120 a close approximation ‘eo a tru1y claims, I employ the term “tubular” or “hollow uniform diameter. cylinder,” or “ho1low cylindrical element” I wish It is even possible to convert a more 0r less the claims to be interpreted broadly enough to tapered taube from a tube of uneven diameter by 20 inc1ude elements in which the wa11 of the su'r controlling the length of the passes anal giving face to be ?nished does not extenc); entirely about the t001 a progressively gmater numbey of passes 360 degrees cf an: and in which the exterior-of through the initially more restricted part of the the surface to be ?nished may -be squa1"e or tube. My invention may thus be employed 1:0 0b recta.ngular or oth‘erwise not cylindrical. 'I‘he tain the following eifects: (a) The smooth ?n 25 terms “tubular” 01' “cylindrical” are not iIi-' ishing of Ehe’ interior surface; (b) the elimina tended to :be taken completely literally, as my tion of irregularities and sharp variations in method and appairatus are applicable to ?nish radius of the inner surfaces; (c) the genßral tru a Wide variety of structureg and a wide variety ing up of the inner surface 150 give it, at a.ny ODE of surfaces, so long as the surfaces to be ?nished point, an approximation to truly circular cross 30 include a, substantial cylindrical area '0r a‘ sub secbion; and (d) rendering the interior of the stantial area, arcuate in transverse cross section. tubular element of substantially uniform diam I'claim: eter from end 110 end. A5 a speci?c example of a. practical operation 1. In a. ?nishing device for ?nishing the in‘ terior surface of a hollow gerierally cylindrica] of my device, projector tubes for torpedoeg max! 35 element, a. motor means’, means for supporting be initially formed from ?at sheets cf metal, the it Within and' upon the surface t0 be treated sheets being bent so that opposite edges approach and for centering it Within said element, means laut du not meet. Such sheets ca.n then be clamped in the supporting structurs C as shown in for moving it axially along said‘ surface‘, and a surface grinding element generally concentric Figure. 15 with the opposite edges cf the sheet abutting against the- flange 85. In that event, the work is clamped in p0sition by the c1amps With an driven by said motor means and includ4 .- ing a surface grinding member mountecl to mov‘e ’ 33. After the initial smoothing has haken p1ace, ; centrifugally toward the interior surface in re sponse to its rotation -by the moto1j and means for reversing the movement of said motor means and surface grinding element When the surface grinding e1ement reaches a predetermined point the taube may then be completed änd provided with its own ?ttings, surrounding rings, rein forcements and the 1ike, rI'his, cf course, may take platze remote from ’ohe structure shown within the hollow e‘1ement. ~ herein. 'I‘he completed tube‚ with it5 longitudinal 2_. In a ?nishing device for ?nishing the in track can then be dropped‘ into the supporting terior surface of ‚a tubular element, a. carriage structure C with its track aligned With the track 50 adapted to penetrante the element to ‘be ?nished, 29 of the shell 25. In that event, t-he member 8I a. motor on seid carriage, a rotary grinding ele is mmoved from the supports 8II. Then the tube ment 0n said carriage and a driving connection may hake its ?nal treatment so far as the present between the grinding means and the motor, mea.ns for propelling the carriage longitudinally method is concerned. It will be understood that the con‘o-acting mem a1ong the element to be ?nished, a centering sup ber or segment 10 may be formed. of any suitable port adapized 130 receive ‘ehe carriage when the substance. It may be abrasive 01‘ it may gonsist carriage is withdrawn from the element, and of or have secured thereto a. polishing element. ‘ means for supporting the element in axial align Under smrie circumstances, it may even be desir ment with said centering support. _ able to Substitute a polishing pad or bu?er. Any 60 a3. In a. ?nishing device for ?nishing the in suitable sealing means may be mounted inter terior surface of a tubular ‘element, a‚'carriage mediate the ends of the motor carriage 1:0 control adapted to penetrate the element to be ?nished, circulation of the air. It may be advantageous a, rotary g?nding element; 0n said carriage and for example 110 insure that air blows along the motor means on said carriage for rotating it‚ key s1ot and cleans out the 100Se material result 65 meang for propelling the carriage longitudinally ing from the grinding. along and within the element to be ?nished‚ ‘a It will be 'understood that the counterweighting centering support adapted to receive the carriage of the sh0e 53 provides an automatic adjustment. and motor means when the cai‘riage is with As the grinding material weamv away, the heavy drawn from the element, and means for sup meta1 shoe advances, further from the center of 70 porting the element in axia1 alignment with sa.id centerin-g support. ‘ ' ‘ rotati’on, and thereby increases its centrifugal 4. In a. ?nishing device for ?nishing the in-~ weight. Also, the cnunterweight retra‚cts toward terior surface of a, tubular element, a carriage the center of rotation and thereby loses some of adapted to penetrate the element to be ?nished„ its centrifugal weight. This compensates for 75 a. rotary grinding element on said. carriage and. loss of actual weight of grinding material. 9 10 means for rotating i-t, means for propelling the 10». In a ?nish-ing device for ?nishing the in ~terior surfa‚ces of tubular elements, a. carriage adapted to penetrante the tubular element to be ?nishecl, a rotary head mounted 0n said carriage carriage longitudinally along the elemen1; to be ?nished, a centering support adapted 10 receive the carriage when the carriage is withdrawn from the element, an_d means for supporting the element in axial aligmnent With seid centering support, and means for preventing rotation ef sa.id carriage in relation 130 said element and and means for rotating it„ anal means for mov ing sadd earriage longitudinally a‚1ong anal within €he »tubular element including a rack extending 10ngitudinally from seid carriage, a pinion in said centering support. mesh With said rack and means for rotating said 5. In a ?nishing dev-ice for ?nishing the in‘ 10 pinion a.nd driving mea‚ns für saic1 pinion includ terior surface of a tubu1ar element, a carriage ing a, frictional connection. _ 11. In a ?niShing device for ?r‘1is‘hing the in adapted 110 penetrate the e1ement to be ?nished, terier Surfaces cf tubula.r‘ elements, a carriage a»rotary grinding element; on said carriage and adapted to penetrate the tubular element to be meang for rotating it, means for propel-ling the carriage longitudinally a;1ong the element 190 be 15 ?nished, a rotary head mounted on said carriage .and means for rotating i-t, gmd means for moving ?nished„ a centering support adapt_ed to receive said_ carriage 1ong‘itudina1ly along and Within the the carr-iage when the carriag-e is withdrawn frem tubnlar element including a rack extending longi the element, a‘nd means; for supporting the ele tudinally from saic1 carx‘iage, a pinion in mesh ment in -axial alignment With said centering sup port„and means for preventing rotation 0f said 20 with said rack and means for rotating said pinion, and limit means. associated with said rack anal carriage in relation to said element anal saic1 adapted 120 terminate the excursion cf the car centering support includin-g a, member projecting radially from said. carriage, said_ centering _sup— riage. 12. In a ?nishing device for ?nishing the in 25 terior surfaces cf tubular elements, a carriage adapt'ed to penetrate the tubu1ar element to be 6. In a ?nishing device f01‘ ?nishing the in ?nished, a, rotary head mounted 0n said carri&ge terior surface of tubular elements‚ a, carriage and means for rotating it, ano1 means for moving including a, plurality of longitudinaliy sp‘aeeo'l port and the e1ement 1:0 be ?nished being longi tudinally slotted to receive said member.v said carriage longitudinally along and Within the frame elements connecting said rings’, means an 30 ti1bular element includihg a rack e‘xbendirlg longi tudinally from sa‚id Carriage, a. =pinion in mesh seid frame elementg for contacting the surface ywith said rack and means for rotating said pinion, 120 be ?n-ished and means for moving said frame and adjustable 1imit means a‚Ssociated with said elements, with the surface contacting means rack and adapted to termina.te the excursion of thereon, into expanded position with the contact the carriage. ing means cdn’cacting the inner sxirface 130 be 13. In a ?nishing device for ?nishing the in treated, and a rotary head mounted on said yterior surfaces of tubular elements, a. carriage carriage, and means for rotating it. » adä‚pted to penetrate the tubular elemen‘t to be 7. In a ?nishing device for ?nishing the in ?ni_shed, a rotary he'a'd mounted on said carriage terior snrface o1‘ tubular elements, a carriage including a plurality cf longitudinally spaced 40 and. means f0r rotating it, and means for moving seid carriage longitudinally along and within the rings, a plurality of longitudinally extending tubu1ar element including a rack extending longi frame elementg connecting sa1d rings, means on tudinally 'from said carriage‚ a, pinion in mesh seid frame elements for contacting the surface with sa‚id rack and means Tor rotating seid pinion, 130 be ?nished. and means for moving sa.id frame elements, with the surface contacting mea.ns 155 and means for changing the direction of drive 01 the pinion when the carriage reaches a predeter thereon, into expanded position with the com mined point in its movement along a tubular ele t'acting means contacting the inner surface 110 be ment. . treated including guiding meang f0r one of sa‚id 14. In a v\_?nirshing device for ?nishing the in frame elements and yielding means tending nor mally 150 urge 117 outwardly in relation 10 said 50 terior surfaces of tubular elements, a carriage adapted 130 penetrante the tubula‚r element to be rings, and a rotary head mounted on said car ?nished, a motor on said carriage, a rotary head riage, and meang for rotating it. on said carriage, a driving connection between 8. In a ?nishing device for ?nishing the in said_ rotary head anal said motor and means for terior surface of tubular elements, a carriage in causihg a ?ow of air about said motor and across cluding a plurality of longitudinally spa.ced rings, the area of contact between seid. rotary head anti a plurality of longitudinally extending frame ele the work including fan means driven by said ments connecting said. rings, means an said frame motor. elements for contacting the surface ‘so be ?nished 15. In a ?nishing device for ?nishing the in" and means for moving said. frame elements, with the surface contact means thereon‚ ini;o expandecl 60 terior surface 0f longitudinally s1otted tubular elements, a carriage adapted 110 penetrate the ele position with the contacting means contacting the ment to be ?nished, a rotary grinding element inner surface to be treated, and a rotary head in said carriage, anc1 means for rotating it, mea‚ns mounted on said carriage, and means f0r mtating rings, a, plurality 0f l(mgitudinalyly extending 113 including a motor mounted. 011 and moving for propelling the ca‚rriage longitudinally along the element 110 be ?nished, a centering support wii-‚h seid carriage. 65 adapted to receive the carriage when the carriage 9. In a ?nishing device für ?nishing the in is withdrawn from the element, means for sup terior surfaces of tu‘oular elements, a. carriage porting the element in axial alignment with said adapted 120 penetrante ‘ehe tubular element 120 be centering support, and means for preventing ?nished, a rotary head mounted on said carriage and means for rotating it, and means for mov 70 rotation of seid carriage in relation to saic1 ele ment and said centering support, including key ing said ca‚rriage longitudinally'along and within means projecting generally radially from saic1 ~ the tubular element including a rack extending carriage and penetrating said s1ot. longitudinally from said carriage, a, pinion in mesh With said rack and means for rotating seid 16. In a. ?nishing device for ?nishing the in pinion. 75 terior surfac'es of tubular elements, a‚ carriage 11 12 ädapted to penetrate the tubular element to be element, the exterior suppdrt‘ihg' ?iearixä für ?hä . ~ ?nished‚ a rotary head on said carriage and mea.ns for rotating it, mea.ns f0r moving said car carriage incluclingr Walls in ge'r’i‘z'ai‘al alignment with the tubular element and ä'däpt6d 130 rec‘eive seid centering and supporting (alemärits _o'h the carriage and to permit movemezit öf the ö‘är?alge riage into, along, and out of a. tubular element, and means for securing said. tubular element in alignment With the path of movement of said eat riage, means for supporting said carriage in align into and out of the tubular elemerit, 0119 or mdre fe‘ctiire when the carriage is in ‘ehe tubular ele ment and when it is on seid exterior supporting 19. In a ?nishing device for ?nishing the in terior gurface of a tubular‚ element, a carriage means. adapted to penetrate the element to be ?nished', cf said centering elements being positidm'a‘d 120 penetrate longitudinally extending slots in said ment with said tubular element, and adja‚cent the ‘supporting means and in the tubular elemqnt, end öf the tubul_ay element, when the carriage has Ideen remove'd froni the tubu1a}r element, and. 10 and being adapted, in cooperation therewith,to prevent rotation of the carriage. ~ means for preventing rotätio‘n of the carriage, ef ~ 17. In a ?nishing deVice for ?nishing the in 15 centering and supporting connections betqw_een the carriage and the opposed inner surface's of the terior surfaces 0f tubular elements, a carriage element, constituting the sole suppbrting means for the carriage during its p'en'etratipn Within the carriage adjacent an ena ofthe tub_ular element element, meansfor preventing rotation‘ of the and in alignment With the interior of said ele 20 carriage, a rotary ?nishing h'ead oh sa.id cärriage, adapted to penetrate the tubular element to be ?nished, a supporting‘ means for supporting said ment, centering and supporting elements on seid carriage for engaging the inner face of the tubular element, the exterior supporting means for the a. motor supported on said carriage, adapted to rotate said ?nishing head, and means' for pro carriage including Walls in genera‚l alignment within the tubular element. pelling the carriage longitudinally along and ~ 20. In a. ?nishing device im‘ ?nishing th€ ‚in with the tubular element and adapted to receive 25 said centering and supporting elements on the terior surface of a. tubular element, a. c9.rriage carriage and to permit ready movement cf the adapted to penetrate the element ’po be ?nished, centering and supporting connections between the carriage into and out of the tubular element, and means, effective when the carriag‘e is Qn said sup carriage and the opDosed inner surfaces of the porting means and when it is in the tubular ele 30 element, constituting the so1e supporting means ment, for preventing rotation of the carriage. for the carriage during its penetration within ‚the 18. In a ?nishing device for ?nishing the in element, means for preventing rotation cf -the ca.rriage, a rotary ?nishing head on saiidcai*riage‚ terior surfaces of tubular elements, a. ca.rriage a motor supported on said carriage, ada’pted to adapted to penetrate the tubular element t0 be ?nished, a supporting means for supporting said 35 rofsa.te seid ?nishing head, and means for pro pelling the carriage lon’gitudinally along am! carriage adjacent an end of the tubular element a.nd in alignment with the' interior cf said ele within thg tubular elemeinä. ment, centering and supporting elements on said carriage for engaging the inner f ace of the tubular HENRY H. TALBOYS. '