US1768272A - Facing machine - Google Patents

Description

t 1mm; 1930. y J. H. TAYLOR 1,768,272

FACIHG MACHINE Filed Jan. 27, 192B 6 Sheets-Sheet 2 rfames Half? @lor J. H. TAYLOR` FACING MACHINE ann 24, 1930.

Filed Jan. 27, 1928 6 Sheets-Sheet 3 /llll lill. lll..

June 24, 1930. J. H. TAYLOR V v 1,768,272

FACING MACHINE Filed Jan. 2,7'. 19,28 '6 sheets-sheet 4 fnz/nof" Jamai Hal! @Zar June.24, 1930. J. HQTAYLOR Y FAcING MAGHINE Filed Jan. 27. 192s 6 Sheets-Sheet 5 ilu 24, 1930. Jy H, TAYLQR 1,768,272

FACING MACHINE Filed Jan. 27, 1928 6 Sheets-Sheet 6 0 /2 90 Z Y /60 v 270 Ime/fof Patented June 24, 1930 UNITED STATES JAMES HALL TAYLOR, F OAK PARK, ILLINOIS FACING- MACHINE Application filed. January 27, 1928. Serial N0. 249,973.

This invention relates to facing machines, and more particularly to a machine for dressing or facing frusto-cylindrical surfaces, such as the ianges of steam nozzles for boilers and similar articles.

In facing steam nozzle flanges or other substantially frusto-cylindrical articles, it is necessary to move the cutting point of the cutting tool through a substantially sinu soidal path toward and away from the face of the article being dressed or faced, the high and low points of this curve corre spending to the high and low points of the faced or dressed surface of the article, that is, to the radius of curvature of such surface. It is the present practice in the art to provide a separate pattern or guide for each radius of nozzle flange to be faced, this guide being used in connection with suitable mechanism including a member movable in contact with the operating face of the guide whereby the desired movement is imparted to the cutting tool. This practice is objectionable as necessitating the provision of a large number of patterns or guides of different radii which occupy appreciable storage space. It is also'objectionable in that it frequently happens that nozzle flanges are required for use on boilers of different radii than those ordinarily accepted as standard.

In such cases it is necessary to construct a special guide or pattern. This necessitates considerable delay in preparatory work for facing the nozzle flange and greatly adds to the cost of such operation. I have found that these objections can be avoided by providing a facing machine in which the cutting tool is moved toward and away from the work by an operating member which swings back and forth in an arc, means being provided for varying or adjusting the radius of the arc through which this member moves.

1n its broader aspects, my invention inv cludes means for supporting the tool and the work for relative radial and rotary movement, in conjunction with means for causing relative movement of the tool and the work toward and away from each other, this latter movement being generated by an operating member which swings back and forth through an arc and has an adjustable pivot whereby the radius of the arc of movement of such member can be adjusted. More specifically, I provide a work holding table which is rotated about a vertical axis,

- a carriage mounted above the table to travel transversely thereof, tool holding means mounted in the carriage for movement toward and away from the table, and a member mounted above the carriage to rotate about an axis coincident with the axis of rotation of the table, this memberV being pivoted to swing about an axis extending diametrically of the table and having operating connection with the tool holding means for imparting reciprocatory movement thereto. The pivotal mounting of this member is adjustable to vary the radius of the arc through ywhich the lower end thereof moves, and thereis provided a sliding and universal connection between the lower end of the member and the tool holder whereby the combined rotary and swinging motion of the former is accommodated. Further objects and advantages of my invention will appear from the detailed description.

In the drawings: L

Fig. l is a side view of a facing machine Vconstructed in accordance with my invention;

Fig. 2 is a front view of the machine;

Fig. 3 is a horizontal sectional view taken substantially on line 3 3 of Fig. 2;

Fig. 4L is a vertical sectional view through the upper portion of the machine, taken substantially on line 4 4 of Fig. 3;

Fig. 5 is a fragmentary vertical sectional view through the upper part of the ram and carriage and associated parts, parts being shown in elevation;

Fig. 6 is a semi-diagrammatic view of the essential parts of the machine illustrating the operation thereof; y y

Fig. 7 is a view smilar to Fig. 6 but taken at right angles thereto, the work being shown in plan at the top of this view for ready reference;

Fig. 8 is a diagram illustrating approximately the path of travel of the cutting or equivalent means which need not be illuspoint of the tool during one complete revolution of the work Fig. 9 is a diagram of the connections between the operating motor and the automatically actuated switch controllingV the motor circuit.

The construction-of the main supportingv In practice this carriage is fed in either direction desired along the rail by a feed screw trated or described in detail. This carriage is provided witha vertically extending box-r like guide 6 the front of which is closed by removable plates 7. AAghollow ramV 8 of approximately rectangular cross section is slidably mounted inthe guide-member 6 for movement toward andV awayy from table 1.

AA tool holder 9 of known construction is secured in the lower portion of the ram 8 in any Vsuitable manner, as by means of set screws 10. A tool 11 of suitable type is suitably secured in holder 9 bymeans of a set screw 12. Upon reciprocat-ion of ram Sthe tool 11 will be correspondingly reciprocated so as to be moved toward and away from the work secured upon table 1. p

lReferring more particularly to Fig. 5, I provide a clevis member 13 at the upper end of ram 8, this member having a stem 14 which extends into the upper end of the ram.

A stop collar 15 is secured on the lower end` of stem 14 in a suitable manner.V In the specific embodiment illustrated, this collar is provided,'adjacent its lower end, with a slot 16 and a cap screw 17 is inserted through the lower portion 18 of the collar and threaded into the upper portion thereof so as to deform portion 18 and force it into binding engagement with stem 14.` AnyV other suitable or equivalent means may be provided for securing the stop collar upon the stem. A wear plate or washer 19 is mounted about the stem of the clevis member and is confinedbetween collar 15 and a suitable roller bearing structure 20 disposed between stem 14 and the lower portion of a bearing sleeve or housing 21 which is threaded into ram 8 at 22 and is locked against turning movement in the ram by a screw pin 23 threaded through the wall of the ram and engaging into a suitable bore I or recess 24 of the bearinghousing. A sec.

ond roller bearing structure 25 is mounted in the upper end portion of housing 21 and is confined between head 26 of the clevis member and shoulder 27 of the housing. The bearings 20 and 25 and associated parts serve to hold the stem 14of the clevis member vagainst endwisev movementin either direction relative to the ram 8 while permitting turning movement of the clevis member about the axis of stem 14 thereof. Any other suitable or preferred means may be employed for securing the stem of the clevis member against endwise movement relative to the ram whilepermitting free turning movement of this stem and I do not, therefore, intend to limit'myself to the particular meansshown and describedfor-accomplishing this/result. .v

Head -26 lof the clevis member is provided, at each end thereof,.with an upwardly Vex-5 tending ear-28. -These earsA receive between them a lug 29 depending from a connecting block 30, this lug being pivotally secured to theears by a pin 31 which extends through a suitable bushing 32. ThisV provides a uni-1:.`

versal'connection between the block 30 and the ram 8. v.

rllhe connecting block30 is of channel cross section and is provided. at the yupper end of each'lateral wall with anvinwardly project-,g

ing flange 33. The fianges'33 engage over laterally projecting flanges 34 of a lf-shaped head 35 provided at "the lower end of a swinging member 36 the body portion of which isof elongated rectangular .shape.-

rrlhe head 35 is of greater length than the width ofvthe body of member 36,-as illustrated y Member 36 is thus operatively connected to the ram by a combined sliding and universal connection which is adapted` to` permit rotationof this member about an yaxis coincident with the axis of rotation yofthe table while also permitting swinging movementV of member-36 about an yexis eX- tending diametrically of the table. Member 36'is supported for swinging movement by inner and outer blocksv 37 and 38, respectively, arranged in pairs at opposite sides ofthis member. A stud shaft 39 (Fig. 3) projects fromblock 38 into block 37, the blocks of each pair Ybeing thus pivotally connected on a horizontal axis. Membgr 36 is provided at each side thereof with a longitudinally extending supporting and guide element or rib 40 of dovetail cross section, block 37 being provided with a flange 41 which fits about one .side of the rib as illustrated. At its other side the block is provided with a flange 42 the inner fa-ceof which vis disposed perpendicular to the body of the block. A clamping plate 43, having its inner face beveled to fit the other inclinedy face of rib 40, is confinedbetween the rib and flange 42 .and is forced into clamping contact with .rib 4() by means of ico nuts 44 threaded onto screw-studs 45 secured in the block 37, or in any other suitable manner. The block 38 includes a clamping section or member 46 which, with the block,fits snugly about a vertically extending rib 47 of dovetail cross section, these ribs being carried by and preferably formed integral with, upwardly extending arms 48 of an upper frame indicated in its entirety by 49. These arms are of channel or other suitable cross section. Each of the ribs 47 is provided, in its inner face, with a central approximately .semi-circular recess 50 which accommodates the outer portion of a substantially circular enlargement 51 at the central portion of block 38. This enlargement 51 is centrally bored and threaded for reception of a screw shaft 52, the lower end of which has bearing in a lug 53 projecting inwardly from the lower end of rib 47. The upper end portions of the shafts 52 extend through and have bearing in bosses 54 on the upper face of a cap plate 55 seating upon and secured to the upper y ends of the supporting arms or uprights 48.

Bevel gears 56 are secured on the upper ends of the screw shafts 52 and mesh with bevel gears 57 secured on the ends of a counter shaft 58 rotatably supported by brackets 59 secured to cap plate 55. A spur gear 60 is secured on counter shaft 58 and meshes with a spur pinion 61 secured on the shaft of an electric motor 62 of suitable type which is mounted upon the cap plate. rThis provides a speed reducing drive between the motor and the screw shafts 52. lVhen the blocks are released from the rails 47 and from the ribs 40 they can be readily adjusted vertically in either direction Vby means of the screw shafts and the motor and associated parts, it being understood that a motor of reversible type is employed for this purpose. p With the arrangement illustrated, the screw shafts 32 are rotated in opposite relation and are, therefore, oppositely threaded. Obviously the gearing for driving these screw shafts can be arranged, if desired to drive both shafts in the same direction, in which case `the shafts will be similarly threaded. Normally the blocks 37 are securely clamped to ribs 40 of member 36, and the blocks 38 are securely clamped to rails 47 of frame 49. To effect clamping of blocks 38 to the ribs 47 cap screws 63 pass through the clamping section 46 of this block and thread into the body or main portion thereof. When the pairs of blocks are thus secured in adjustment member 36 is supported for swinging movement about an axis extending diametrically of the work holding table 1.

The frame 49 includes an annular base or supporting member 64 which, in the form illustrated, isv formed integrally with the uprights 48 and the rails 47. The base member 64 is rotatably mounted upon an annular upper supporting frame 65 the inner portion of which rests upon and is secured to the main supporting frame or structure 4, the outer portion of the upper supporting frame 65 being supported by a column 66 or in any other suitable manner. Frame 65 is provided with an inwardly projecting shoulder 66 the inner face 67 of which is beveled downwardly and inwardly and has contact with the similarly beveled outer face of a retaining member 68 suitably secured to the under face of base member 64. Preferably, a wear plate 69 is mounted on the upper face of shoulder .66 and a cooperating wear plate 70 is secured on the under face of the outwardly projecting centra-l portion of the base member. The member 64 is provided with an inner upwardly projecting fiange 71 about which fits a gear ring 72 which is secured to member 64 in a suitable manner. The construction of the frame 49 and associated parts and the mounting thereof on the upper fixed sup-V porting frame 65 can be varied in many respects, as will be evident to those skilled in the art, and l do not, therefore, intend to limit myself to the particular construction illustrated and described, such construction being merely by way of illustration. The ring 65 and the base member 64 of the frame 49 are disposed in vconcentric relation to each other and to the table 1. Member 36 is thus supported 'for swinging movement about an axis extending diametrically of the table and forl rotation about an axis coincident with the axis of rotation of the table.

Referring more particularly to Figs. 1 and 3, an electric motor 73 of suitable type is supported by a bracket structure 74 extending from the main supporting frame 4 at the top thereof. A pulley 75 is secured on the shaft of this motor and has driving connection, -by means of a belt 76, with a pulley 77 secured on a drive shaft 78 rotatably mounted in brackets 79 suitably secured 'to the main frame 4. A bevel gear 80 is secured on shaft 78 and meshes with a bevel gear 81 secured on a horizontal shaft 82 rotatably mounted in a bracket structure 83 suitably secured to the main frame 4. A bevel gear 84 is secured on the inner end of shaft 82 and meshes with a bevel gear ring 85 suitably secured to the under face of table 1. The uprights at the ends of the bracket structure 83 are connected by a bridge member 86 having a central bearing sleeve 87 through which is rotatably mounted the lower end portion of a vertical shaft 88. This shaft has driving connection with shaft 82 through the miter gears 89. The upper end portion of shaft 88 extends through the top of the main supporting structure or frame 4 into and through a sleeve 90 of -the upper frame 65, suitable anti-friction bearings 91 beingl provided in the upper portion of sleeve 90, forthe shaft. A spur pinion 92 is secured onthe upper end of shaft 88 and meshes with the ring gear 72 for rotating the frame and the parts carried thereby. Frame 49 and the table 1 are rotated in the same direction, as indicated by the arrows in Fig. 1, and the pinions 84 and 92 are so proportioned, relative to the gear rings 85 and 72, respectively, that the table and the frame 49 are rotated at the same speed. This provides simple and efficient means for rotating the table and member 36 about a common vertical axis simultaneously and in the same direction and at the same speed.

To assure accuracy of operation of the machine it is desirable that means be provided for preventing any lateral movementV or play of member 36, particularly when the supporting and clamping blocks are so` adjusted that the axisabout which this member swings is remote from the lower end or head 35 thereof.k Referring more particularly to Figs. 3 and 4, member 36 is provided in its lower portion Vwith a central opening 93 of elongated rectangular shape and with two smaller .openings 94 at each :ide of the opening 93, the portion of member 36 between the central opening and each of the side openings being dressed or faced to provide a guide -element 95. Flanged wear shoes 96 fit about elements 95 at the inner sides thereof and are supported and adjusted on elements 95 byadjusting screws 97 which pass through the guide elements and thread into the shoes, the heads ofl these screws bearing against the. outer faces of'elements 95. Pressure screws 93 are threaded through the elements 95 and bear against the outer faces of shoes 96.rk The screws 97 and 98 provide means for supporting shoes 96 and for adjusting them inwardly and outwardly of the central opening 93. The wear shoes 96 contact with theV lateral faces of a brace and guide beam 99 .which extends through the opening 93, this beam being dis posed diametrically ,of base member 64 of frame 49 and at right angles to member 36. The beam 99 may be supported and secured to member 64 in any suitable or preferred manner. In the construction illustrated, I provide web elements 100 formed integrally with member64 at diametrically opposite portions thereof. A pair of spaced supporting brackets 101 of substantially L-shape are bolted or otherwise secured to the under face of the web element 100and receive between them the end portion of beam 99, this beam being secured to the brackets by bolts 102 or in anyother suitable'manner. The. beam 99 is also provided, at the upper portion of each end thereof, with a web element-'103 4which is bored and threaded in their uppermost positionand, conse- Y quently, theradiusjof` the. arc through which the `lower end of.memberw36swings isathe greatest.. The ...Wear shoes are adjusted to fit-snugly against the .sides of the beam 99, but Vwithout binding, thus effectually preventingfanyv lateral play `or Vloose'ness of member 36 andguiding, it accurately/dur ing its swinging movement to and fro. This assures .accuracy in operation Aofthe machine as well as relieving thesupporti'ng blocks and 4associated parts ofundesirable stresses which would result fromnot properlyV bracing the low-er portion lof member 36 against lateralplay.v j' Y l I have illustrated my ,machine as used for dressingfor facing. the base flange 106of a steam nozzle107 for a steam boiler. To as,- sure a proper fit between this flange. and the boiler shell .it is Anecessary that the :flange be dressedor facedfonfa radius corresponding to the exterior radius .offthei boiler. The

supporting blocks fory vmember 36 are ad'- justed at the proper radius by first releasing the clamping-members of these blocks in the manner previouslyA described and then rais# ing or loweringrthem theproper distance by means of the screw shafts 52 and motor '62. Before releasing the clampingblocks, a stop member or block .is placed between the lower end of ram 8 and the .table or theworkon the table so` asito prevent ydownward Amovement of .member 36 whenreleased. The adjustment of the supporting blocks should be such that the distance between the axis about which member 36 swings and the axis of lthe pin 31 is vequal to thevdesired. radius.V This may be determined by ,direct measurement or one of the supporting blocks for vmember 36 may be provided with an indicating point 107 moveable over a scale Von the swinging member which is properlycalibrated for this purpose.V After the supporting blocks have been` properly adjusted they are 'securely clamped to member 36 andto 'the supporting and guide railsV 47, after which .the block beneath the ram 8 is removed and the work is secured on table l by clamps 108 in a known manner. `The workor nozzle: 107 .should be disposed concentricallyl with table 1 so-that itsvertical axis coincides withV the vertical i periphery thereof. Rotation of the table 1 turns the work in cutting engagementfwith the 4tool and, during rotation of the frame 49, member 36, due to its connection to the ram, swings in an arc transversely of the table toward and away from central position thus raising and lowering the cutting tool, the cutting point of the tool describing approximately a sinusoidal curve during each complete revolution of the work, this curve corresponding to the development of the desired surface formed on the face ofthe flange 106. As rotation of the table 1 and the frame 49 continues, the carriage is moved along its rail 3 so as to move the tool 11 radially of the work, this operation continuing until ther entire width of the flange has been dressed or faced.

The operation of my machine will be understood more clearly by reference to Figs. 6, 7 and 8. In Fig. 6 member 36 is shown as pivoted to swing upon an axis adjacent the head 35 so that the pin 31 moves through an arc of relatively short radius. Member 36 is shown as in its central or vertical position with the cutting tool 1l in its lowerinost position, at which time the cutting point of the tool is at the bottomv of the curve or to the zero position on the plan view of the nozzle in Fig. 7. As rotation of the frame 49 continues in a counterclockwise direction, the lower end of member 36 swings toward the right as considered in Fig. 7, this movement continuing until the work has turned through one quarter of a revolution, that is through an angle of 90 degrees, at which time the pin 31 is in its uppermost position and, consequently, the tool 11 is in its uppermost position corresponding to the high point of the desired face on the flange 106. With member 36 pivoted to swing about the axis a the block 30 swings through portion c-cZ of the arc cZ-e having a radius def. During this swinging movement of member 36, head 35 slides through the connecting block and the clevis member 13 turns in ram 8 in the manner previouslyv described. As

rotation of the work continues the pin 31 is moved downwardly until member 36 is again in vertical position, at whichv time the pin 31 is in its lowermost position and the cutting tool is disposed at the low point of the trough of flange 106. As rotation of the work continues member 36 again swings toward the right raising the pin 31 until this pin is at its high point when the work has been turned through another 90 degrees, and the pin is again lowered during the succeeding 90 degrees of rotation of the work so as to be returned to its low point position. It

will thus be seen that in a single revolution of the work, and, consequently, a single cut of the tool, indicated at X, starting at zero,

- the tool is in its highest position at 90 and 270 degrees andis in its lowest position at zero and 180 degrees. The cutting point of the tool, in effect, is thus caused to travel through an approximately sinusoidal curve such as that illustrated in Fig. 8 in which the high and low points of the Atool corresponding to Fig. 7 are indicated. In addition to this reciprocating movement imparted to the tool by member 36, this member acts to raise the tool ata uniform rate corresponding to the curvature of the surface produced by facing the flange, since the carriage is fed toward the right so as to move the tool radially of the flange. This does not, however, affect the proper operation of the cutting tool toward and away from the work since the radius of the arc cZl-ef is fixed and member 36 is returned to verticalv position after each half revolution thereof with the frame 49. With member 36 adjusted to swing about the axis al the tool will be reciprocated through the vertical distance it in the manner previously described. This distance corresponds to thevertical distance between the high and low points of the flange 106 being faced on the radius arf-j".l If itis desired to face a flangewon a greater radius as, vfor example, the radius j, the clamping and supporting blocksare adjusted so that the axis thereof is disposed at the point z' kof Fig. 7. WithV the blocks thus adjusted the connecting block 30 is, in effect, moved through an arc having the radius -j shifting the tool vertically through the distance 7: which corresponds to the vertical distance between the high and low points of a nozzle flange being faced on such radius. j

Vhile I have, for the sake of clearness in description, referred to the connecting block 30 as being moved through an arc with member 36, this is not strictly correct. In fact, the lower end of member 36 swings through an arc and the connecting block swings about the pin 31, but the radiusvwhich is effective in raising and lowering the ram 8 is the distance'between the axis of pin 31 and theaxis about which the member 36 swings. With this explanation, it is thought that the description of the operation of the machine will be clear to those skilled in the art. For purposes of comparison, I have shownin the ico lower portion of Fig. 7, the vertical distance lo in relationto a fiange indicated at 109, this flange being faced on the rad-ius y'. VIt will be noted that the low point of the cutting tool is the same in each instance, a high point being different according to the ,radius of the face produced on the flange. While I have illustrated and described my machine as used for facing nozzle flanges, it is well adapted for 'facing various other articles upon which it is desired to produce a substantially frusto-cylindrical surface ofanydesired radius.` j Y vDue to thefaot that member 36 is disposed 'in the carriage.

at an angle to the'V ram during movement of thetool from its high point to its lowpoint on the work, and vice versa there is a side pull' on this ram. Ordinarily thisside pull is not objectionable and does nothave any serious tendency to cause binding of the ram I have found, however, that if the angle between member 36 and the ram becomes sufficiently-small the side pull on the ram and consequent binding thereof becomes a serious consideration and might, in eXtreme cases,y cause breakageofthe Amachine. To avoid this I provide means whereby the circuit of the main operating motor I73 is opened automaticallybefore the swinging member reaches the binding; position stated. This means includes a plunger-:rod 110 which?l is slidably mounted throughfstem 14 of the clevis member 13.V This rod fisprovided at its upper end with an enlarged head 111 operating in an enlarged b'ore for recess 112-extending from the upper end :of stem 14C.' An expansion-coilfspringllis mounted inf this boreV about rod 110 and vis confined between the bottom ofthe bore and head '111. Thisspring urges the head fof rod 110 toward lug 29 vof the connecting rod :30. Upward movementl of 'rod 110 is `limited by a stopmember 114-suit`ably secured thereon and `abutting the/lower end of fstem 14. A flanged collar 115 is secured on'the rod 110 belowV member 114 and serves to guide the vrodin its operation in the ram 8. A pair of, trip plates 116," having beveled inner edges, are secured to lug29 at lthe opposite sides thereof, these plates being disposed to depress the rod '110, by contact with the head 111 thereof, when-the block 3() is swung into ,its eXtreme position in either direction and before member 36 lis at its critical/angle to the ram. l

A trip arm 117 Vis vpivoted at one end, at

` 118, in an-opening 119 provided through one wall ofthe ram 8. The opposite end of this arm operates through an opening 120 through the opposite wall of thevram and is provided'with aneye 121 through which is threaded a screw 122 which is secured in adjustmentthrough the eye by a lock nut 123. For convenience in adjusting the screwvit is provided with a-knurled head 124 at its lower end; Head 124Cis disposed adjacent the-upper end of a button-125 Aof an electric LswitchY-l26fof fknown type disposed within a casing 127 which'is secured to the -ram for movement therewith. When the rod V'110 is ,depressed -it contacts with a lug -128 projecting laterallyffrom arm 117 and depresses `the arm thus actuating switc'h 126-to openthe motor circuit." This-serves to stopoperationA of-t-he machine-and thus avoids possibility Of-damage thereto due to member 361 being- @dispos'edl 'at- 'too great an inclinationto the ram 8. The operation of this control 'switchw'ill fbe readily understood fromFig. 9 in which-I have-illustrated diagrammatically the manner of connecting the switch into the motor circuit. The switch itself is of a well known type and need not be illustrated nor described in detail. Ordinarily this switch will not come into play during the operation of the ma chine and is of use only when facing flanges and similar articles of unusually short radius or of unusual width. Under ordinary conditions, there is no serious binding between the ram and the guide therefor car'-V ried by the carriage and the' safety control switch is not necessary, the provision of this switch being a precautionary measure to take care of unusual conditions.

InY the specific embodiment of myinvention shown by way of example, the work holding table and the frame carrying the swinging membererotate on a common axis. My invention is not, however, limited Ito thisspeciic construction and comprehends,

Ain itsbroader aspects, any suitable means for causing-'relative rotary movementfbetween the work and the tool. The desired results can be accomplished, in example, by having the -work supporting table andthe frame carrying the swinging member sta= tionary and movingthe tool holding device, and consequently the too1,in a circular path vconcentric with the nozzle the flange `of whichf is beingfaced." Within the-'scope of my invention I contemplatethebroad com,- bination of work holding means'and tool holding means having relative movement toward'and away from each other, in combination -withmeans for causing relative rotary movement between the work andthe tool andmeans for actuating the tool in proper manner to cause the cutting point thereofico Y to describe, inleifect,a sinusoidal curvevcor-V Y responding to the development of the frustocylindrical sur-face being faced;` Thebroader of theappended claims `are,vtherefor, to

Aof a pipe for juncture Iwitha second pipe.

By a frusto-cylindrical surface, I' mean; a surface of a'troughshape', such as a steam nozzle flange, which is curvedon 4a radius to i'itfthe cylindrical surface-of a''boiler shell." Y i 1. In a `machine for-facing frusto-cylin-,J

drical surfaces, work holding means and tool holding means having relative rotary and radial movement, an oscillating member movable in an arc toward and away from the work holding means, the arc of movement of said member extending transversely of said work holding means, connections between the oscillating member and the tool holding means, said connections moving the tool holding means toward and away from the work holding means through a path corresponding toy the arc of movement of the reciprocating member, and means for varying the radius of the arc of movement of said member.

2. In a machine for facing frusto-cylindrical surfaces, work holding means and tool holding means having relative rotary and radial movement, means for causing relative movement of the work holding means and the tool holding means one toward and away from the other, the means for causing such movement including an oscillating member movable through an arc extending transversely of the work holding means, and means for varying the radins of the arc of movement of said member.

3. In a machine for facing frusto-cylindrical surfaces,'a support, a carrier on the support,'a tool holding device having translatory movement in the carrier, a second support, a member mounted on said second support for swinging movement, and slidably connected to said tool holding device, said member andthe carrier having relative rotary movement, said carrier being movable toward and away from the axis of said rotary movement, and work holding means, the tool holding device and the work holding means having relative rotary movement.

4. In a machine for facing frusto-cylin-V drical surfaces, a support, a carrier on the support, a tool holding device having translatory movement in the carrier, a second support, a member mounted on said second support for swinging movement, and slidably connected to said tool holding device, the first mentioned support and said second support having relative rotary movement, and said' carrier being movable toward and away from the axis of said rotary movement, and work holding means, the tool holding device'and the workholding means having relative rotary movement. Y

5. In a machine for facing frusto-cylindrical surfaces, -a support, a carrier on the support, a tool holding device having reciprocating movement in the carrier, a second support, a member mounted on said second support for swinging movement, and slidably connected to said tool' holding device, said member and the carrier having relative rotary movement and the carrier having movement toward and'away from the axis of said rotary movement, and work holding means, the tool holding device andthe work holding means having relative rotary movement.

6. In a machine for facing frustocylin.

drical surfaces, a tool holding device mounted for reciprocating movement, a member mounted to swing about an axis and connected to said tool holding device, said member and the tool holding device having relative rotary movement on an `axis substantially normal to the axis of swinging movement of said member, means for moving the tool holding device toward or away from the axis of said rotary movement, and work holding means, the tool holding device and the work holding means having relative rotary movement.

7. In a machine for facing frusto-cylindrical surfaces, mounted for reciprocating movement, a member mounted to swing about an* axis and connected to said tool holding device, said member having rotary movement on an axis normal to the axis of its swinging movement, means for shifting the tool holding device toward or away from the axis of said rotary movement, and work holding means, the tool holding device and the work holding means having relative rotary movement.

8. In a machine for facing frusto-cylindrical surfaces, a tool holding device having movement in two planes substantially normal to each other, a member mounted for swinging movement about an axis and connected to said device, the tool holding device and said member having relative rotary movement on an axis substantially normal to the axis on which the member swings, and work holding means, the tool holding device and the work holding means having relative rotary movement.

9. In a machine for facing frusto-cylindrical surfaces, a carrier, a tool holding device having translatory movement in theY carrier, said carrier having translatory movement at right angles to said first mentioned translatory movement, a swinging!- member connected with said toolrholding device, the carrier and the swinging member having relative rotary motion on an axis substantially normal to the axis of swinging movement of said -member, and work holding means, the tool holding device and the worlr' holding means having relative rotary movement.

l0. In a machine for facing frusto-cylindrical surfaces, work holding means, tool holding means, a member mounted for swinging movement, the work holding means and the swinging member having relative rotary motion on an axis substantially normal to the axis on which said member swings, the tool holding means being connected with the swinging member for reciprocation thereby toward and away from the work holding means, and meansv for feeding the tool holding means substantially at right angles to its reciprocation, the tool holding means and the swinging member having relative rotary movement.

11. Ina machine for facing frusto-cylindrical surfaces, a tool holding device, a member mounted for Vswinging movement and having sliding and rotary connection la with said device, said member and the tool holding device having relative rotary motionand the cutting point of the tool generating a cur-ve corresponding to the intersection of twocylinders, and work holding means, the tool holding device and the work holding means having relative rotary movement.

12. "In a machine for facing frusto-cylindrical surfaces, a rotatable table for supg. porting the work, a Vcarriage `moveable transversely of the table, tool holdingmeans mounted in the carriage for movement toward and ,away fromV the table, a 4member pivotally mounted beyond the carriage for 2:2 swinging movement about an axis extending diametrically of the table, means `for rotating said member about an axis coincident with the axis of rotationof the table and at-the same-speed as the table, and zur.J connections between the swinging member and the tool holding means, said connectionsimparting movement to said tool holding means toward and away from the table insynchronism with the rotation thereof, saidv connections comprising Va member connected to thepivotally mounted member for relative sliding movement in a direction parallel to the pivotalaxis of said pivotally mounted member.

13. VIn a machine for facing frusto-cylindrical surfaces, a rotatable table for sup-fV porting the work, a carriage moveable transversely of the table, tool holding means mounted in the carriage for movement toward and away from the table, a member pivotally mounted beyond the carriage for swinging movement about an axis extend-Y ing diametrically of the table, means for rotating said member about an axis Vcoincident with the axis of rotation of the table and at the same speed as the table, and a combined sliding and pivotal connection between the pivoted member and the tool holding means imparting reciprocatory mo- 551i tion to the tool holding means in accordance with the swinging of said member.

14:. In a machine for facing frusto-cylindrical surfaces, a rotatable table for supporting Vthe work," a carriage moveable transversely of the table, tool holding means mounted in the carriage for movement toward Vand vaway from the table, a member pivotally Vmounted beyond the carriage for Iswinging movementabout an axis extending diametrically of the table, the ax-,is Aof of the table, and connections between said member and the tool holding `means reciprocating the latter' in accordance with the swinging motion of lthe swinging member, said Aconnections comprising a-member connected to the pivotally mounted member for relative sliding movement in a direction parallel to the pivotal axis of movement of said pivotally mounted member.

15. In a machine for facing frusto-cylindrical surfaces, a work supporting table rotatable about a vertical axis, a carriage above the table and moveable transversely thereof, tool holding means mounted, in the carriage for reciprocating movement toward and away from the table, a frame mounted above the carriage and rotatable about an axis coincident with the axis of rotation of the table, a member mounted in the frame for swinging movement about an axis extending diametrically of the table, means for rotating the table" and the frame simultaneously and at the same speed, and operating connections between said member and the tool holding means, said connections moving the tool holding means toward and away from the table in accordance with the swinging movement of the swinging member.

16. In a machiner for facing frusto-cylin- Y drical surfaces, Va lwork 'supporting table rotatable about a vertical axis, a carriage above the table and moveable transversely thereof, tool holding means mounted in the carriage for reciprocating movementV toward and away from the table, a frame mounted above the carriage and rotatable about an axisl coincident with,V the axis of rotation of the table, a member mounted in the frame for swinging movement about an axis extending diametrically of the-table,

means for rotating the table and the frame n simultaneously and at the sameA speed, operating connectionsbetween the member and the tool holding means, said connections c moving the tool holding means toward and away from the table in accordance with the swinging movement of said member, and means for adjusting the axis about which the member swingstoward and away from Y the table. Y i

17. In a machine for facing frusto-cylindrical surfaces, a work supporting tablerotatable about a verticalaxis, a carriage above the table and moveable transversely thereof, tool holdingmeans mounted in the carriage for`V movement toward and away from thetable, a frame mounted above the carriage and rotatable about an axis coincident with the axisV of arotation ofl the table, a

member mounted in they frame for swingingv movement about an axis extending diametrically of the table, means for rotating the table and the frame simultaneously and at the same speed, the member having ahead at its lower end extending transversely of the table, a block connected to said head for vertical movement therewith, said head being slidable through the block, and a universal connection between the block and the tool holding means.

18. In a machine for facing frusto-cylindrical surfaces, a work supporting table rotatable about avertical axis, a carriage above the table and moveable transversely thereof, tool holding means mounted in theV carriage for movement toward and away from the table, a frame mounted above the carriage and rotatable about an axis coincident with the axis of rotation of the table, a member mounted in the frame for swinging movement about an axis extending diametrically of the table, means for rotating the table and the frame simultaneously and at the same speed, the member having a head at its lower end extending transversely of the table, a block connected to said head for vertical movement therewith, said head being slidable through the block, a universal connection between the block and the tool holding means, and means for adjusting the axis about which said member swings toward and away from the table.

19. In a machine for facing frusto-cylindrical surfaces, a work supporting table rotatable about a vertical axis, a carriage above the table and moveable transversely thereof, tool holding means mounted in the carriage for movement toward and away from the table, a frame mounted above the carriage and rotatable about an axis coincident with the axis of rotation of the table, said frame having vertical guide and supporting rails, a member disposed between said rails and having at each side a vertical guide and supporting element, pairs of blocks between the guide rails and the side elements of the member, the blocks of each pair being pivotally connected on an axis extending transversely of said member, means for releasably and adjustably securing the blocks to the member and said rails, respectively, means for rotating the table and the frame simultaneously and at the same speed, and a combined sliding and universal connection between the tool holding means and said member, said connection reciprocating the tool holding means in accordance with the swinging of the swinging member.

20. In a machine for facing frusto-cylindrical surfaces, a work supporting table rotatable about a vertical axis, a carriage above the table and moveable transversely thereof, tool holding means mounted in the carriage for movement toward and away from the table, a frame mounted above the carriage andfrotatable about an axis concident with the axis of rotation of the table, a member, pairs of blocks connecting the memberat the sides thereof to the frame, the blocks of the respective pairs being pivotally, connected on an axis extending transversely of said member, means for releasably securing the locks to the frame and the member, means for adjusting the pairs of blocks simultaneously and lengthwise of said member, means for rotating the table and the frame simultaneously and at the same speed, and a Icombined sliding and universal connection between the member and the tool holding means for reciprocating the latter in accordance with movement of said member.

2l. In a machine for facing frusto-cylindrical surfaces, a work supporting table rotatable about a vertical axis, a carriage on the table and moveable transversely thereof, a ram mounted in the carriage for movement toward and away from the table, -a frame mounted above the carriage and rotatable about an axis coincident with the axis of rotation of the table, a member mounted in the frame for swinging movement about kan axis extending diametrieally of the table, a clevis member mounted in the ram for turning movement about a vertical axis and connected to the ram to impart vertical movement thereto, a connecting block pivotedto said clevis on a horizontal axis, means connecting the block to the lower end of the swinging member for vertical movement therewith, said connecting means being constructed to permit horizontal sliding movement of said swinging member relative to the block, tool holding means carried by the ram, and means for rotating the table and the frame simultaneously and at .the same speed.

22. In a machinev for facing frusto-cylindrical surfaces, .a rotatable table for supporting the work, a carriage movable transversely of the table, tool holding means mounted in the carriage for movement toward and away from the table, a member mounted beyond the carriage for swinging movement about an axis extending diametrically of the table and rotatable on van axis coincident with the axis of rotation of the table, means for simultaneously rotating said member and the table in the same direction and at the same speed, andV connections between said swinging member and the tool i holding means, said connections imparting movement to the tool holding means toward and awayv from the table in synchronism with the rotation thereof. Y i Y 23. In combination in a maehinef'o'f theV character. described, a frame, a member mounted in the frame'for swinging movement about an axis extending transversely thereof, and means carried by said frame for guiding the member during swinging move- IZB ment thereof, said means holding said member against lateral movement.

24. In combination 1n a machine of the characterA described, a frame,- a member mounted in the frame for swinging movement about an axis extending transversely thereof, said member 'having 'an opening, and a guide beam carried by the frame and extending through said opening at right angles to the axis of movement of the member, said beam and said member having cooperating means for guiding the member and holding it against lateral movement during swinging thereof.

25. In combination in a machine of the character described, a frame, a member mounted in the frame for swinging movement about an axis extending transversely thereof, said member having an opening, a brace and guide beam secured to the frame and extending through said opening at right angles to the axis of movement of the member, wear shoes mounted on said member at the sides of the beam, and means for adjusting said shoes towardV and away from the lateral faces of the beam.

26.'In combination, a holding device a member mounted for swinging movement and having sliding and rotary connection with said device, means for rotating said member, the holding device generating a curve corresponding to the intersectionof two cylinders, and work holding means,

the holding device and the work holdingv means having relatively rotary movement.

27. In a machine for facing frusto-cylindrical surfaces, a tool holding device, a member mounted for swinging movement on an axis and having sliding and rotary connection With said device, said member and the tool holding device having relative rotary motion and the cutting point of the tool generating a curve corresponding to the intersection of two cylinders, the distance be'- H tween said axis andthe connection between said member and the tool holding device being approximately equal to the radius generated, and work holding means, the tool Y Vholding device and the work holding means having relativerotary movement.

28. In a machine for facing frusto-cylindrical surfaces,fa carrier, a Vtool holding device having translatory movement in the carrier, said carrier having translatory movement at right angles to the'movement of the tool holding device, a member mountedfor swinging and rotary movement and slidably connected to the tool holding device,

and rotatable work holding means.

In witness whereof, I hereunto subscribe my name this 23d day'of January, 1928.

JAMES HALL TAYLOR.V

CERTIFICATE OF CORRECTION.

Patent No. 1,768,272. Granted June 24, 1930, to

JAMES HALL TAYLOR.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 7, line 13, claim l, for the word "reciprocating" read oscillating; and that the said vLetters Patent should be read With this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 9th day 0f September, A. D. 1930.

M. J. Moore,

(Seal) Acting Commissioner oi Patents.

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