US980052A - Grinding and polishing machine. - Google Patents

Description

J. C. BLEVNEY n J. HAUSMAN.

GRINDING AND POLISHING MACHINE.

' APPLICATION FILED HAY 20, 1909. 980,052.

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4 SHEETS-SHEET 1.

Patented Dec. 27, 1910.

141mm hoff/J neooeo V 0' Wm J. C.' BLEVNBY & J. IAUSMAN. GRINDING AND PoLIsHING MAGHINB;

kAIPLIfJATION FILED HAY 20, 190B.

Patented Dee. 2,7, 1910.

4 SHEETS-SHEET Z.

J. C. BLEVNEY & J. HAUSMAN. GRINDING AND PoLIsHING MAOHINB.

APPLICATION FILED MAY Z0, 1909.

Patented Dec.l 27, 1910.

4 SHEETS-BHEBT 3.

` 14eme @Hof/maal J. C. BLEVNEY & J. HAUSMAN. GRINDING AND PoLIsHING MACHINE APPLICATION FILED HAY 20, 1909.

Patented Dec. 27, 1910.

4 SHEETS-SHEET 4.

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UNITED STATES PATENT oEEIeE.

JOHNl e. BLEVNEY AND JOHN HAUSMAN, 0F NEWARK. NEW JERSEY.

Specification of Letters Patent.

Patented Dee. 27, 11.910.

Application filed May 20, 1909. Serial No. 497,331.

To all whom it may concern:

Be it known that we, JOHN C. BLEVNEY and JOHN HAUSMAN, citizens of the United States, and residents of Newark, county of Essex, State f New Jersey, have invented certain new and useful Improvements in Grinding and Polishing Machines, of which the following is a speclfieation.

This invention relates to improvements in grinding and polishing machines.

The construction of the machine and` the objects thereof are fully set forth in the hereinafter description.

The invention is illustrated in the accompanying drawmgs which form part of this application, but these illustrations are examples'onl and they are not `to be understood as 1l ustratlng the onlyV forms of my invention.

-'vlew of a portion of a polishing machine equipped with a work-hol er for supporting shafts or rods; Fig. 2 is a front view of the 'apparatus shown in FiO. 1- Fig. 3`is aside vlew on an enlarged scale of the Work-holder shown in Fig. 1; Fig. 4 is a front view of the same; Fig. 5 is a front .view of a portion of a polishing machine equipped with a work-holdin device for small varticles Fig. 5 is a detai view of one end of th'ework holding belt viewed from the rear of the machine; Fig. G is a detail view on line G of Fig. 5; Fig. Z is a detail` view on line 7 of Fig. 5; Fig. 8 is a lan-.view of a work holder for light artic es, such a pipe; 9 is a side view of the same; Fig. 10 is a etail view of a backing to be used behind the abrasive belt of the polishing machine; Fig. 11 is a side view of a modified form of backing to be used when-the work to lbe polished as a prominent irregular surface; Fig. 12 is a front view of the same; Fig. 13 is an end view of a form of a hand operated backing; Fig. 14 is a front or plan view of ,the same; Flg. 15 is a side view of the same;

' Fig. 16 is a side'view of another modification of backing; Fig. 17 is a front view of the same5 Fig. 18 "is an end view thereof.

Referring more particularly to Figs. 1, 2, 3 and 4 of the drawinvs; the reference character 1 represents the frame of the polishin machine of a type in which an abrasive be t 2 is driven over a backing or cushioning belt 3 by means of a pulley or in any other Y polished.

suitable manner. 4 represents a rod to be.

polished and 5 is the wogk holder, of which a sufficient number is em-plo ed, depending upon the length of the ro' or` bar to be polished. In the present instance we have shown two work holders mounted upon a stationary shaft 6 which is carried by a bracket 7 secured to the frame of the machine. The ends of the shaft 6 may. be supported in ordinary bearings, not shown, provided with feet and resting in the floor, or byany other suitable means.

Each work holder consists of a bracket 8 having an aperture 9 through which the shaft 6 extends. Mounted in this bracket is a fixed skew roll 10 and two additional skew rolls 11 and 12 which are adjustable in the bracket. by means of slots and bolts as shown. A shaft 13 passes through the brackets 8 and secured to it is a pulley 14 by means ofwhich said shaft is drlvcn by a belt 15 from a pulley 1G secured to the shaft 17. Pivoted on the shaft 13 at the outer end of the bracket 8 is a bearing 18. 19 is a shaft carried by said bearing and has at on'e end thereof a worm wheel 20 which is driven by a worm 21 on the shaft 13. The opposite end of this shaft 19 has secured thereto a bevel gear 22. The upper end of the bearing 18 is bifureated and by the bevel gear 22.

.Secured to the shaft 23 is a skew roller 25. The bearing 18 may be adjusted 'at an angle to the bracket 8 so as to bring the skew roller 25 to rest u n the rod 4 emg The skew rol er 25 is held under spring pressure against. the rod 4 and the amount of tension adjustable by the following mcans. A threaded rod 26 passes through a nut 27 pivoted in the bearing 18. This rod also extends through the pivoted nut. 28 in the bracket 8. By rotatmg the rod 26the bearing 18 is moved toward or fromv the bracket and the skew roll 25 is adjusted to suit the size of the rod or shaft 4 to be polished. An expansion sprmg 29 is located between the uut 28 and the ook nuts 30 which pulls the bearing 18 toward the work and keeps the skew roll 25 in frietioual contact with the rod being polished.

The operation ma be briefly stated thus: After the work hok ers are mounted on the shaft 6 the rod 4 to be polished is placed on Isanie.

and 12 are adjusted until the rod 4 comes in proper contact with the abrasive belt 2 behind which is the backing 31 which backing is shown more clearly in detail in Fig. 10, althoughV any other suitable form .of backing may be used. The pivoted bearing 18 is now adjusted Aby means of the threaded rod 26 until the skew roll'25 rests on the rod 4. When the machine is started the abrasive belt rubs against the rod 4; andthe proportioned that the speed* of the longitu` dinal movement is low. By this mechanism the rod 14 is automatically rotated and moved longitudinally so that its entire surface is brought in contact with. the.. abrasive belt 2 to automatically grind and polish the same.

In Figs. 8 and 9 I'ha've shown a simple form of work holdervfor light4 shafts or tubes. In this construction the tube is marked 49. is thebase plate which may be clamped on-or near the frame of themachine 1- by the bolt 51 ,and nut 52. A bearing 53 is secured to the base plate and carries. a skew roller 54`and maybe adjusted by the slot of thenut 56 to bring the skew roller in'contact with the tube being ground or polished. This tube rests upon askew roller 57 and is held down thereon by the pivoted plate 58 under pressure of the sprmg 59 on the rod 51. In 'this instance the work being comparatively light the tube 41 is rotated by the 'abrasive belt 2, and the skew rollers 54 and 57 being in contact therewith will be rotated by the tube 49 andthey.

y' are so ,positioned that they will move or drive the tube 49 longitudinally and transversely of the belt'to grind and polish the 'entire surface thereof. The Atension of the spring 59 causes the tube ,49 to be held in frictional contact with the skew rollers.

In Figs. 5to 7 inclusiveI have illustrated a Work holder where a' number of -small artlcles, such as plates, nuts or the like, ma

be polished. `In this construction a sha 33 is mounted in the bracket 8 carried by the frame of the machine and at each end of this shaft are secured pulley supports 34 and 35. In the support 34 .is mounted a vertical shaft 36 andy a horizontal shaft 37.

The latter shaft is driven from the shaft 17 by the belt 15 passing over the pulleys 16 and 39 and through bevel gears 40 on the shafts 36 and 37 the vshaft 36 is driven. Secured to the shaft 36 is a pulley 41. The pulleysupport 3 5 carries the vert-ical shaft 42 on which is secured the pulley 43. A carrying belt 44 runs over the pulleys 41 and 43. This belt is provided with any suitable number of pins or studs or other means 38 for supporting and carrying the work to be operated on.

In order to hold the articles on the carrying beltwhile being moved to the abrasive belt we provide a channel 45 in which the carrying belt runs. One side 46 of this channel extends longitudinally. beyond the other and in front of the abrasivebelt, thus furnishing a backing for the belt 44 at the point lof work, as more clearly shown in Figs. 6 and 7. This channel is supported by arms 47 'secured to the shaft 33.

The operation is as follows: The operator stands at the end vof the channel near the support 35 and on the far side of the machine, as shown in Fig. 5 of the drawing. As the belt 44 passes in front of him he sticks or Ahangs onto the studs 38 the articles to be polished. These are then carried through the channel 45 and pass the abrasive belt 2, that side 46 of the channel 45 .in front of 'the abrasive belt holding the carryingV belt to its work. After the articles pass beyond the abrasive belt they are removed 4 therefrom, or in some instances' they are caused to automatically drop from the belt,

or they may be removed by any automatic means. Behind the abrasive belt 2 I may use either such a backing as shown' by Fig. 10 of thev drawing or any of the backings shown in the other igures, or any 'other suit# able backing. A

Fig. 10 shows the bracket 31 to be used behind. the abrasive belt 2. Preferably it is in the form of Va plate de ending from the bracket 60 which is provi ed with slots 61 so that it may be adjustably fastened on the frame 1 of the machine by a suitablebolt or nut.

In Figs. 11 and 12 is illustrated another. form of backing where it is ldesired to have the abrasivel belt- 2 yieldingly pressed at di'erent points to grind 'and polish uneven or irregular work. In this construction the backing comprises a bracket 62 by which the backing is secured to the machine. Pivoted at 63 on the bracket is a depending arm or plate `64 which carries'a per orated plate 65 through which project a plurality of spring controlled fingers or studs 66. The bracket 62 is provided with an extension 67 which l carries a bolt-@68 whicl asses through an opening in the arm 64. n said bolt is ivoted a lever 69 provided with a cam sur ace 70 betweenthe arm. 64 and the extension 67. A bolt 71 is threaded withy the arm 64 and abutsagainst the extension 67 A spring.'.72

`on the bolt' 68 presses the arm against the cam surface 70, thepressure being regulated by the bolt 71. I l.

When the work is in place'ready to be operated on the lever 69 is turned to allow the arm 64 to be operated onby the influence of the spring 72 which then presses the said ariii toward the abrasive belt 2. As the work passesin front of-and against the abrasive belt 2 the studs or fingers 66 press the belt to the work, but permit it to yield to any uneveriness in the work. The result of this is an instantaneous yielding of the grinding pressure at a given moment by means of a highly, etiicient and adjustable mechanism.

Where it is desired lto exert a stronger :pressure by hand on a certain partof the work we may use such a backing as illustrated in Figs. 12, 13 and 14 ofthe drawings. In this construction a bracket 74 is provided to which is pivoted at 7 5, 76 and 77 the levers 78 having a handle 79. To each of these levers at 90 is pivoted a rod or bolt 80 around which is a coil spring 81. Securedto these -bolts is a plate 82. The

.spring 81 normally holds the said plate pending upon tlie extent of the depression or defect. f y

In Figs. 16,17 and 18 We have shown an other belt for use when an irregular surface of prominent depressions is being worked on. In this construction we provide a supporting bracket 84 which carries a number of corrugated spring members 85, the corrugations of which do not lie in the same plane. These spring members furnish a yielding or cushioning action immediately behind the abrasive belt andthe high points of the corrugations yield readily to the difference in the surface of the work operated on.

It might be Well to state that it is to be understood that when the backin plates hereinabove 'described are used, t e are placed back of the cushionin belt 3; t at is, the belt 3 rims between the abrasive belt and the backing plates.

IIaving now described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a machine of the class described, the

combination of an abrasive belt, means for" driving the same, a bracket mounted adjacent to the belt, workholders carried by the bracket, including skew-rolls independently adjustable relatively to each other on said bracket, and means for rotating one of the adjustable rolls.

' 2. In a machine of the class described, an abrasive belt, means for driving the same, backing-means adapted yieldably to press the .abrasive belt to the work, and workholders, comprising a Guide-roll, a second guideroll adjustable relatively thereto, and means for yieldably holding the article against the giiide-rolls.

3. In a machine of the class described, the combination of an abrasive belt and means for holding the work in operative relation thereto, coin )rising three rolls, two of which are inounte( on different sides of the third and adjustable relatively thereto, and a fourth roll yieldablyheld and adjustable with relation to said third i'oll.

4.l In a machine of the class described, the combination with an abrasive belt and means for driving the same, of work-holding means, comprising a guide-roll, additional guide-rolls adjustably mounted to move toward and away from the first guide-roll, and a spring-pressed skew-roll adjustable angularly to the guide-rolls, and means for Idriving'sait'l skew-roll.

5. In a machine of the class described, the combination with an abrasive belt and means for driving the same, of work-holding means comprising a bracket having horizontal and vertical arms, a guide-roll mounted at the junction of said arms, an additional guide-i'oll mounted on each of said arms, and a skew-roll angularly adjustable with relation to the guiderolls.

Iii-a machine of the kind described, an abrasive element yieldably pressed to the work combined with means for feeding and holdingr the work adjacent to the abrasive element, comprising a rotative element and an element having means for 'pressing it yieldably to the work, the last named element and the abrasive element being independently yieldable in opposite directions.

l. In a ,machine of the kind described, an abrasive element combined with rollers disposed to feed the,work adjacent thereto,

means for adjusting one of said rollers relatively to another and holding it lyieldaby` iii its adusted position, and means for a j usting t e supporting means for positively driviiigsaid roller.

8. In a machine of the kind described, an abrasive element combined with a series of relatively adjustable skew rollers, means for positively driving one of said rollers, a threaded adjusting rod for the latter, and a s ring acting upon said rod to hold the rol er yieldably againstthe work.

9. In a machine of the kind described, the combination with aii abrasive element of a backing therefor, comprising a, movable plate, and adjustable means acting .on said plate to yieldably press the abrasive element to its work. a

10. In a machine of the kind described, the combination with a `flexible abrasive element of means for holding the work adr,V jacent thereto, and a backing means adapted to engage' the abrasive element, having a- 'plurality of supplemental independently with means for'pressing it yieldably towardv the abrading element and having a plurality of independently movable yieldable elements for engaging the abrading element.

12. In a machine of the kind described, the combination of a flexible abrasive element, means for feeding the same, backing means therefor, comprising a plate and springyieldably pressin the plate toward the abrading element an a plurality of in dependently movable yieldable elements carried by the late and engaging the abrasive element,. an means for holding the work and feeding the same in a plane transverse to that of the movement of the abrasive element. l

13. In a machine of the kind described, the combination of a liexible abrasive element, a pivotally supported backing plate for said element, means for pressing vthe plate yieldably toward said element, and a plurality of independently movable yieldable elements carried by the plate and projecting therefrom toward the abrasive element.

w14; In a' machine of the kind described, the combination of a flexible yabrasive element, a pivotally-mounted backing plate therefor, a spring pressing the backin plate toward the .abrasive element, means or fixing the plate against the action of the spring,

and a plurality of inde endently movable y'feldable elements carrie by the plate and projecting therefrom toward the abrasive element.

15, In a machine of the kind described, the combination of a liexible abrasive element, a pivotally-mounted backing plate therefor, a spring pressing the backing plate toward the abrasive element,l means for fixing the plate against the action of the spring, adjustable means for regulating the movement of the plate toward the abrasive element, and a lurality of'independentlymovable yieldab e elements carried by the plate and projecting therefrom toward the abrasive element.

A 16. In a machine of the kind described, the combination of a flexible abrasive element, a bracket having an extension, a back-v ing plate pivotally connected to said bracket, a boltconnected to said extension .and hav-A ing' a spring which presses the backing plate yieldably toward the abrasive element, a lever pivoted to said bolt and having a cam surface mounted between thevextension and backing, an adjustable stop for determining the movement of the backing, and a plurality of independently-movable yieldable elements carried by the plate and projecting therefrom toward the abrasive element.

In witness whereof we llave hereunto set our hands at New York, county of New York, and State of New York, this 6th day of May, 1909.

JOHN C. BLEVNEY. n JOHN HAUSMAN. -In presence of- JoHN J. RANAGAN, i ISABEL R. RICHARDS.

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