US1563900A

US1563900A - Grinding machine

Info

Publication number: US1563900A
Application number: US732602A
Authority: US
Inventors: Edward B Gardner; Ralph D Gardner; Nielsen John
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-08-18
Filing date: 1924-08-18
Publication date: 1925-12-01
Anticipated expiration: 1942-12-01

Description

E. a. SEARDNER ET AL GRINDING MACHINE Filed Aug. 18, 1924 3 Sheets-Sheet 1 gjm ww Dec. 1, 1925 1,563,900 E. B.(3AJ?EHUEFQ ET AL GRINDING MACHINE Filed Aug. 18, 1924 3 Sheets-Sheet 2 Dec. 1 1925.

E. a. GARDNER ET AL GRINDING mcnxun Filed Aug. 18, 1924 3 Sheets-Sheet 5 Patented Dec. 1, 1925.

UNITED STATES EDWARD B. GARDNER, RALPH D. GARDNER, AND JOHN NIELSEN,

wIscoNsIN.

PATENT OFFICE. I

or IBELOIT,

GRINDING MACHINE.

Application filed August 18, 1924. Serial No. 732,602.

To all whom it may concern:

Be it known that we, EDWARD B. GARDNER, RALPH D. GARDNER, and JOHN NIELSEN, citizens of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Grinding Machines, of which the following is a specification.

1 This invention pertains to grinding 1na chines, and the present application is directed-to improvements on the grinding mavide" means for angular-1y adjusting the supporting'links and the dresser tool'relative to the adjacent face of the grinding wheel wherebyfthe "dresser" may be accurately ali nedwith the face of said wheel.

'Knother important objectof our invention is to provide the dresser with hardened metal bearings for pivotal connection with the supporting links and to provide for adj istment thereofand at the same time retain the dresser in a vertical planecentrally between opposed grinding discs'wh'ereby the face of either disc may be dressed. I Other objects and advantages of this inventionwill be apparent as the same becomes better understood by referring to the following description when considered V with the accompanying drawings.

Referring to the drawings,

Fig. lis a rear elevation of a machine embodying our invention, 7 i

Fig. 2 is an end elevationlooking toward the left at Fig.1," 3

' Fig. 3 is-a side elev'ation'of the dressing tool, one end thereofbeing shown in section, Fig. 43is'a crosssectional view'taken' on line l4 of Fig-3,

. Fig. 5 1s a transverse sectional view showing the pivotal connection between the dressing tool and one of the supporting links, and

6 is a plan view of the dresser supp rt showing the means for permitting the angular adjustment thereof;

It will be observed by reference to the guideways 6. The respective guideways v6 support reciprocatory carriages 7 which are 4 provided with suitable bearings in which the wheel carrying shafts 8 are respectively journaled. Upon the inner end of each shaft 8 is fixed a grinding wheel 9., These shafts 8 may be driven through the medium of pulleys 19, or by individual'motors.

The carriages 7 together with the grindingwheels 9 are moved toward and from each other by a suitable mechanism operated through the medium of a rock shaft 11'. This operating mechanism per se forms no part of the present invention and is fully shown and described in our co-pending application referred to above. It'is sufficient to'state that the carriages 7 are normally urged toward each other to cause an approaching movement of the wheels 9, by an arm 12 which is fixedto the rock" shaft 11, the arm-being'actuated grinding by "a weight 13 which is suspended therefrom. The rockshaft 11 is positively rocked in the-opposite direction through the medium of-a cam mechanism driven from the maindrive shaft of the machine 14. The tip proaching movement of the grinding wheelsis variably limited by a stop screw 15 which is carried byan arm 16 fixed to the rock shaft 11, said screw being set to engage an abutment shoulder '17 on the machine frame. j p v For the purpose of dressing the opposed faces of the grinding wheels, we have mounted at the rear of the machine upon a bracket 16, the supporting plate 19. A dresser tool 20 is pivotallysupported on said plate by parallel links 21-21 so as'to permit said tool to bemoved radially of the grindingwheels and in a substantially horizontal plane.

The dressing tool 20comprises a holder 22 and a cutter tool head 28-, the latter being provided with a shank 24 which fits within a bore 25 extending inwardly from the end of the head 23. The tool head shank adapted'to be turned 180 about its longltudinal axis, and means are provided for retaining the tool in either extreme positions of adjustment. This means comprises diametrically opposed flats 26 formed onthe shank 24c and a set screw 27 mounted in the tend entirely across the holder, and the outer holder for engagement with either flat. Mounted in the holder 22 in advance of the bore 25 are a pair of spaced hardened metal bearings 28. These "bearings 28 'ex-' ends of each hearing are respectively formed with conical seats 29.

Each of the links 21 and their pivotal connections with the supporting plate 19 and the dressing tool 20 are identical and therefore the description of one link and its connections will sufiice. Each link is in the nature of a swinging frame having at itslower end a pair of spaced depending bearing lugs 3030 which are respectively connected to the plate 19 by means of pivot pins '31. The upper end of each link 21 is formed with upwardly extending bearing lugs 32-32 which form a resultant recess 33 for receiving the dressing tool 20. The bearing lugs 32 are respectively formed,

, in alignment. Adj-ustably mounted-in each of the bearing openings 34 is a bearing pin 35 having a tapering inner end 36rfo-r engagement with the adjacent seat 29 of the associatedbearing 28. These bearing pins 35 are adj ustablelongitudinally of the openings 34 and are adapted to be held in adjusted positions by set screws 32 mounted in the bearing lugs 32. Thus, by means of these adjustable bearing pins 35 the pivotal connections between them and the dresser tool 20 may be adjusted to a nieety. 1

The supporting plate 19 and consequently the dresser tool '20 is mounted upon the bracket 18 for angular and longitudinal adjustments relative to the face of the grinding wheel so as to make it possible for .the operatorto properly align the tool with the face. To this end we have provided the bracket 18 with a fulcrum pin '37 which projects upwardly into a slot 37 formed in the plate 19. A pair of bolts 7 38 also project upwardly from the bracket through slots 39, formed in the plate 19. These slots 39 may be a-rcuate or, if straight as shown in Figure 6, should be wide enough .to loosely accommodate the bolts 38 therethrough so that the plate 19 may be adjusted to the angular relation desired. The bracket is also provided with a pair of upwardly extending lugs dO-O, and each lug is equipped with an adjustable screw 41 which bears against the adjacent face of the plate 19. Nhen adjustment of the dresser tool is required the bolts 38 are loosened, whereupon by turning the screws ll in the proper directions, the dresser tool together with supporting links may be swung in a horizontal -pla:ne about the fulcrum pin 37 or moved longiti-idinally with respect to the wheels, or both, to properly align the tool with the faces of the grinding wheels, as desired. After this adjustment has been made, the bolts 38 are tightened to lock the dresser tool in itsadjusted position. It should be noted that these adjustments are merely coarse adjustments to approximately position the dresser centrally between the grinding wheels and that finer adjustment is taken care of by moving the grinding wheels individually toward the dresser when the bracket 18 is locked. v 1

In operation,.the dresser tool head is first adjusted about its axis so as to co-operate with the facev of one 0f the grinding wheels, The tool is then lined up withsaid grinding wheel face, and the operator, by grasping the outer end of the tool holder 22, swings the dresser tool back and forth radially of the wheel and in engagement therewith, the movement of the vtool beingrin a substan tially horizontal plane which preferably im tersects the axis of the wheels.v After one wheel has been surfaced, the operator then;

oscillates the tool head about'and are: of 1180", secures the same in position by the set screw 27, and then moves the dresser tool back and forth across the face of the-other wheel.

o claim: 7 V I i 1. In a grinding machine, the combination with a rotary grinding wheel, of asupport located at one side of theaxislof said wheel,

a tool for surfacing one face of said wheel andra pair of parallel links respectively pivoted to said support and tool .for permitting the tool to be moved'substantially radially of thewheel. a

2, In agrinding machine, the combination with spaced rotary-grinding wheels, ofa support located at one side of the axis of said wheels, a tool for surfacing the faces of said wheels, said tool being positioned between the wheels and comprising a holder and a tool head connected to the inner end of said holder, said connection between the tool head and the; holder including means 7 for permitting the oscillation of the tool about an arc of approximately .180, means for securing said tool head to the holder in either extreme position of adjustment,

means for pivotally mountinghsai dl tool onsaid support for permitting said to be moved substantially radially of the I wheels.

3. In a grinding machine the combina tion with spaced rotary grinding wheels, :of a support located at one, side of theaxis of said wheels, a tool for surfacing the faces :of said wheels, said tool being positioned between the wheels and comprising a holder and a tool head connected to the inner endof said holder, said connection between the tool head and the holder including means for permitting the oscillation of the tool about an .arc of approximately 180, means for securing said tool head to the holder in extending inwardly from the inner end thereof and a tool head having a shank mounted in said bore, a pair of spaced metal bearings extending transversely of the holder in advance of the shank, and a pair of parallel links respectively pivoted to said support and to the metal bearings of said holder for permitting the tool to be moved substantiallyradially of the wheel.

.5. In a grinding machine, the combination with a rotary grinding wheel, of va support:

located at one side of the axis of said wheel, a tool for surfacing one face of said wheel, said tool comprising a holder having a bore extending inwardly from the inner end thereof and a tool head having a shank mounted in said bore, a pair of spaced metal bearings extending, transversely of the holder in advance of the shank, and a pairof parallel links respectively pivoted to said support and to the metal bearings of said holder for permitting the tool to be moved substantially radially of the wheel, the pivotal connection between each link and the holder com rising a pair of spaced bearing pins carried the respective ends of the associated metal bearing.-

,6. In a grinding machine, the combination with a rotary. grinding, wheel, of a support 1 located at one side of the axis of said wheel,

a tool for surfacing one' fa'ce of said wheel, saidtool comprising aholder having a bore extending inwardl from the inner end thereof and a tool head having a shank mounted in said bore, and a pairof parallel links-respectively pivoted to said support and to the metal bearings of said holder for permitting the t'ool to be moved substantially radially oi the wheel, the "jivotal' connection "between'each link and the olderfcomprising by the link and engageable with a pair of spacedbearing pins carried by the link and engageable with the respective ends of the associated metal-bearing, said bearing pins being laterally adjustable, and means carried by the link for securing said pins in adjusted position.

7 In a grinding machine, the. combination with a rotary grinding wheel, of a sup ort located at one side of the axis of said wl ieel, a pair of spaced links pivoted to the sup ort for rocking movements towards and rom the axis of said wheel, the upper end of each link being recessed to form resultant spaced lugs, a tool located within the recesscs of said links, and means for pivotally connecting said tool to the spaced lugs of each link,.whereby said tool may be moved substantially radially of the wheel to surface the adjacent face of said wheel.

8. In a grinding machine, the combination with a rotary grinding wheel, of a support located at one side of the axis of said wheel, a pair of spaced links pivoted to the support for rocking movements towards and from the axis of said wheel, the upper endof each link being recessed to form resultant spaced lugs, a tool located within the -recesses of said links, and means for pivotally connecting said tool to'the spaced lugs of each link, whereby said tool may be moved substantially radially ofthe wheel to surface the adjacent face of said wheel, said pivotal connection between the tool and each link comprising a transversely disposed metal bearing carried by the holder and bearing pins respectively carried'by the lugs of the associated link and having means to adjust said ins.

9. n a grinding machine, the combination with a rotary grinding wheel, of a support located at one side oftthe axis of said wheel, a tool for surfacing one face of said wheel, a pair of parallel links respectively pivoted to said support and tool for permlttlng the tool to be moved substantially radially of the wheel,.and means'forl an'gularly ad'usting said'su'pport relative to the plane 0 the grinding wheel. t t

EDWARD B. GARDNER. RALPH-D. GARDNER. JOHN "NIELSEN.