US1055808A - Machine for grinding rollers. - Google Patents

Description

O. A. SCHMIDT.

MACHINE FOR GRINDING ROLLERS.

APPLICATION FILED FEB.16k1912.

1,055,808. Patented Mar. 11, 1913.

SSHEETS-SHEET 1.

O. A. SCHMIDT.

MACHINE FUR GRINDING ROLLERS.

APPLKLATIUS F1LEDIEB.l6, 912.

1,055,808, Patented Mar. 11, 1913.

3SHEETSSHEET 2.

0. A. SCHMIDT.

MACHINE FOR GRINDING ROLLERS.

APPLICATION FILED FEB 16, 1912 Patented Mar. 11, 1913 3 SHEETS-$531K 3 Wu nesses.

I r Zii/fentm: I, 7 544%,. M, yn W UNITED s 'rEs PATENT OFFICE. I

OTTOhAiiWIN SCHMIDT, F CHELMSFORD, ENGLAND, ASSIGNOR TO T HE HOFFMANN MANUFACTURING COMPANY LIMITED, 01? LONDON, ENG LAIN'D.v

MACHINE FOR GRIND'ING RoLLEns.

Specification of Letters Patent.

- Application am; February 1 1 12, Serial No. 678,017.

To all whom it may concern:

Be it known that I, OrroAnwin a subject of the German Emperor, residing at Chelmsford, in thecounty of EsseX,.Eng-.

land, have invented a certain new and useful Improvement in -Machines for Grinding- Roller-s, 0t which the following is a specification.

This invention relates to a machine ,or device for grinding the corners of rollers such as those used in roller bearings, the object of same being to grind the corners to a radius or curve though it 'may be adapted to provide them with a chamfer or an le or angles at their corners while the re lers are in movement through the machine.

It has been found highly move the sharp angles at the ends of the rollers when they terminate in the usual right angle faces and provide 'a radius because even the obtuse angles left with a chamfer ifa mere angle say of 45-- is removed may still operate in the bearing to effect a cutting of the roller race or to effect damage to the roller. .To obtain such a radius. or a chamfer and other ends one form ofmaehiue or device for exa'mple according to thepresent invention'is provided with a movable grinding member, preferably a disk,

horizontally arranged and formed :of a grinding material or capable with the addition of a suitable material of effecting the grinding and a guide or holding device for presenting the rollers to the face of same, which guide is preferably a channel having, according to requirements, two, threeor four sides orportions of sides adapted to closely hold and control the rollers so that they have a rolling movement of progression or a partial rolling movement'therein. The guide in. question preferably presents the 'periplr cries of the rollers in the first instance to the grinding face and then has a gradual twist given to it so that one corner only of the rollers is presented to the grinding face the twist as the rollers progress gradually tilting them until the desired radius or curve,

for example a quarter twist is attained when the rollers may pass away from the grinding face, or the twist may be reversed or continued to allow them to be further acted upon. .it being desirable in any case that the rollers pass to a transferring device which takes them from theexit end of the grind desirable to reing face to ,the'entranee end again as several passes may be necessary to obtain the required reduction.

Another form of" machine or device is adapted to grind a chamferor ale on the roller after it has been given a. su den twist by the holder as long as desired after whichthe roller is given. a further twister twists to grind the'next cor-ner and $0 on. The twi may be effected in a fixed holder hay inga twisted channel or in a straight chanof a suitable-rocking or other. movement or in a combined straight and twisted channel in a rocking or like holder.

Embodiments of theabove and other features of the invention are illustrated in the accompanying drawings in which:-

Figure 1 is an elevation partly in section of a machine having a twisted channel which is arranged in the form shown for radius grinding. Fig. 2 is anend elevation partly in section on line u-u Fig. 1.

Fig. 3 is a cross section oxran enlarged scale'of apart.

Patented Mar. 11, 1913.-

nel or channels carried by aholder capable I of Fig. 1 on line 'v-v. Fig. 4 is a cross sec- 7 tion on anenlarged scale of apart ofi-Fig. 1 on line ww. Fig. 5 is a cross section on an enlarged scale of a part of Fig. 1 on line ac w. Fig. (3 is a similar view to Fig. 1 of a machine for chamfer grinding. Fig. 7 is an end elevation partly in section on line tt Fig. 6; Fig. 8 is a cross section on an enlarged scale of a part of Fig. 6 on line ;1 y. Fig. 9 is a similar view. to Fig. 1 of a machine having a rocking holder arranged in the form shown for radius grinding, and Fig. 10 is an end elevation partlyfin section on line ss Fig. 9. Figs. 11 tol fiare cross sections on an enlarged scale to Show different positions of the same roller in tlierocking holder; Fig. 13 being a section on the central position on line zz ofFig. 9 to'. show the holder and the section .Of the grinding disk at this point. The views Show the same roller at different positions" in the holder in order to illustrate the grinding operation, and not sectional views of the holder in the same or stationary position throughout.

Referring to Figs. 1 to 5 the grinding disk 1 is suitably supportcdabove a channeled holder 2 by adjustable devices now well known in connection with such grinding disks a part of such adju$ting devices aving a gradual twist from the point where it enters beneath the disk to its exit point that isifrom a-somewhat greater distance than that between the' section lines 1) to m respectively the twist being approximately OVCIatL'QllEtItBI of the roller 3 to be acted on.

It is desirable in forming this. twist in the, holder that the corner of the roller to beaeted upon remains in the same plane throughout. Preferably the twist is so. ar-

, ranged that the rollers 3 (which travel in close succession) enter an introductory part 2 of thechannel beneath the disk with their peripheries on the same plane as the latter as seen in the end view Fig. 2 that bein the position they have 'in the traveling ro ling movement in the transferring device hereinafter described, and immediately commence to resent their corners to the action of the dis as'show'n in Fig. 3 and gradually turn over until they occupy the positions shown as examples in Figs. i and 5. At the exit point from beneath the disk the channel commences another quarter twist from about the point 4 to about the} point 5 in the part 2 Fig. 1,50 as to bring the rollers again into their true rolling position in the channel to enable them to move easily through the transferring device. This transferring device may be either with or without a mix-' ing device, that shown hasnone and consists only of a channel. 7 connecting two channeled driven wheels 8 8 having spring pressed semi-,circular cov r plates 8 8 such wheels on their. lower sidi es communicating with the channeled holder 2 2. By this means the rollers are carried in succession around again to the entrance end of the disk where the next corners are presented to the grinding action.

.T he grinding disk is provided with screw means for raising and lowering it, or for exerting a spring pressure on the rollers such means being of thecharacter employed in ball rinding' machines having two grind- ,ing dis s, usually vertical where one" is required to exert a spring pressure and to be withdrawn and replaced. The wheels 8 8 are also suitably driven from sprocket wheels 9 and chains andgears (not shown) to provide a positive propulsion for the.

rollers as this is generally desirable.

The holder 2 is in the case illustrated provided with three supporting sidesfor the rollers as shown in Figs. 3 to 5. i

,The construction shown in Figs. 6 to 8' is similar as regards the main part of the machine but the twist say of 45 given to the channel in the holder 2 commences at about the point 10 and ends-at about the point 11 so that the corner of the roller is presented suddenly to the grinding disk across the face of which it travels without change until {the exit where from about the point 12 to the point 13 in the part 2 the channel has another reverse twist of 45 to bringit back into rolling position after which it has a half twist in the-channel 7 of the transferring device from sa the point 14 to the point- 15 to complete y rener may be acted u on during its next fpass beneath the grinding disk. The roller holder 2 at the point where the'rol ler is being acted upon by the disk is preferably provided with four sides as shown so as totally support the roller 3, two of the sides bein formed by a cover plate 16 Fig. 8.

The construction shown in Figs}? to 1-5 is similar as regards the. grinding disk and transferring device except that ahopper 17 is shown in the latter forv mixing the rollers in their order 1 of progressiori-fior filling them into the channel and *fo'r other purample ofone which is suitable for all forms of the machine shown. The main holder 2 for the rollers has in these figures aslow rocking movement given to it so that the zdesired complete radius at once commences to be action df the grinding disk. This rockin end in bearings 18, 18, by hollow gudgeons 19, 19 with which connect ortions 20, 20 or continuations of said hol er. tions 20, 20 are connected with'fixed parts 2 and may be made of flexible tubing having internal dimensions; suitable for the rollers, or of four-metallic strips or wires as indicated or in other ways so that they will follow themovement of the rocking holder and receive the rollers anddeliver The-rocking motion is shown as obtained from cranks 21, 22 and connecting rod 23 from a shaft 24 which is suitably driven and the holder has in its central portion a the position of the rollers.

It is desirable to support the rollers 3 on three sides but it is also necessary to expose suflicient radius may be obtained. To this endthe rocking holder is formed with a casev the periphery and a sutlicient port-ion of the end of the roller to allow of the corthrough an arc of 45 backward and forward so that referring toFigs. 11 and 12 which show the first or entering part- 25 of the holder channel it' will be seenthat in such part a radius will be obtained com mencing at the periphery of the roller and leaving off when the holder has arrived at verse its position whereby the opposite cor roduced while the rollers are undei' 'the gl 5 holder as shown extends outside the full diameter .of the disk and is carried at each These porthem from and to the carrying wheels 8.

twisted center channel 26 which can change channel as shown in Fig.11exposing in this I poses, such hopper being given as an exthe periphery as Well as one end so that a ner being exposed, and such holder moves 6 corner of the roller the end of the amount of its angular movement as above. This being done it is necessary to expose the end and grind the rest of the radiuson same up to the point on the where the first part of the radius ceased. This is effected by providing in the holder the twisted center channel in Fig. 13 which can change the rollers in their travel from the position shown in Figs. 11 and 12 or the entering part to that shown in Figs. 14 and 15 or leaving part 27, so that the end which was previously covered is now fully exposed.

The tw t in the part :26 Fig. 13 is effected without the roller being acted upon by the disk as the part 26 is located beneath the opening.or internal diameter 28 usual in grinding disks of this character. The figure shows the roller in an intermediate position, it having twisted around half of 45. In doing this the sides of the roller groove have altered their shape as the one on the periphery is growing and the one on the end is disappearing, though the cross section of the rocking holder otherwise does not alter, it being preferably a bar throughout from the entering to the leaving end with two faces at 135. The groove or channel so arranged in the bar that the corners of the rollers are kept in the same plane. From the po ition in Fig. 14 it is necessary or desirable to turn the roller into a true rolling position again, and this is effected by a twist in the channel of the holder as indicated.'at 29. After being carried around given a half twist in the channel 7 of the transferring device to reverse them, so that the other corner is acted upon at the next. pass. It will be understood that some of the reversals of position of the rollers required in the above construction can be ef fected in other ways and at other points as twist to any amount could be arranged to take place while the rollers are under the action of the grinding member as for example by dropping the holder below its normal plane so that the roller is not touched by the grinding men'iber while being turned or reveised. Also, that according to the form or arrangement of the guide or holding device, either a corner or both corners of the roller may be ground to a radius, or the entire cud, or both ends.

The machines or tlvvices may be combined with one for grinding the peripheral faces of the rollers where he rollers have a true rolling motion of progression as in .ipt-citi cation No. lti5TTtL-2bth .inly ltlltl the rollers while passing a ross one part or chord of the face of the grinding member or dist: being acted "upon peripherally and while passing: across another part or chord being acted \ipou at their corners.

It is known to carry needles in a posiby the wheel 8 at this end, the rollers are l l l l tivcl'y rotating holder adapted to carry them past the angled corner of a grinding disk so as to remove the bur from their heads and also to grind a groove in rollers near their beads by positively rotating each in a series between a driven disk and a fixed part. against the action of a rotating grinding disk.

Various modifications may be made in the invention over the constructions described such for instance as in the multiplication of the channels, or in the guiding of the freely moving rollers, the machines illustrated being examples of some suitable for acting upon the corners of rollers while having a traveling rolling or partial rolling movement through the machine.

What I claim is 1. A machine for grinding the corners of rollers to a radius, curve, orangle comprising in combination a framework, a holder carried by said framework, provided with a channel in which the rollers are accurately but freely held and capable of moving with a corner exposed and a rotatable grinding disk to which such roller corner is presented and which both grinds and imparts a traveling movement to the rollers.

2. A machine for grinding the corners of rollers to a radius, curve, or angle, comprising in combination, a framework. a holder carried by said fran'iework provided with a channel in which the rollers are accurately but freely held and capable ofunoving with a corner exposed, means for varying the angle of such channel and exposed corner, and a grinding member to which such roller corner is presented.

3. A machine for grinding the corners of rollers to a radius, curve, or angle, comprising in combination, a holder provided with a channel in which the rollers are accurately but freely held and capable of moving with a corner exposed said holder having a twist in the channel Qf same to vary the angle of such exposed corner, and a grinding member to which such roller corner is presented.

4r. machine for grinding the corners 0t rollers to a radius, curve, or angle, comprising in combination a holder in which the rollers are accurately but freely held and capable of moving with a means for rocking such holder to vary the angle of the corner exposed and a grinding member to which such roller corner is pre sented.

5. A machine for grinding the corners of rollers to a radius, curve. or angle, comprising in combination channel in which the rollers are accurately but freely held and capable of moving with a corner exp sed. means for rocking such holdct: toWary the angle of the corner exposed. a twisted portion in the channel of such holder to fully grind the radius curve a holder provided with av IUt) corner exposed,

on said corner, and a grinding member to t which such roller corner is presented.

6. In a machine for grinding the corners of rollers to a radius, curve or angle. itlltl in 5 combination a rocking holder provided \filll achannel in which the rollers are accurately but freely held and capable of traveling With acorner exposed, a grinding member for acting on such corner and a, clevice for introducing the rollers to the removing them therefrom in their travel, such device being attached to the holder and capable of moving therewith.

7. In a machine for grinding the corners of rollers to a radius, curve or angle, and in combination, a holder in which the Pollen j are accurately but freely held and capable i of moving With a corner exposed, :1 g im? ing member to which the corner is IJXtESttllQtl and means outside of that part of the holder 1 holder and for eas es when to the grinding a twist to the roller. mine tor grinling the corners 2 recline t-IIYL an angle, and in mtiotr 3t tol-iier in which the rollers ale accurately nut f et-13' held and capable Whit a oi'titr expoeed a grinding L h th miner is presented, rs from the 1 holder, and rollers in order of 'iereunto set 11 m ni e i no subscribing lit Y hand in th W tiles-we,

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