US1670111A - Grinding machine - Google Patents

Description

R. D. GARDNER' GRINDING MACHINE May '15. 192 1,670,111

Original Filed April 10, 192 2 Sheets-Sheet 1 R. D. GARDNER May 15. 1928.

GRINDING MACHINE aizi ezz ioz" gage/Z10 kzzizzez' Original Filed April 10, .1922

Patented May 15, 1928.

wise STAT S,

e a-in WENT-95519 559 I RALPii 1). GAItDN ER, or BELOI'I, wIscoNsIN, ASSIGNOR or ONE-THIRD TO'EDW'ABD B.

9 H GARDNER AND O E- 111313 To'Jo NIELSEN.

' 1 GRINDING MACHINE- Original application filed April 10, 1922',' Serial No. 551,008. :Divided. and this application filed June 28, v 1923., Serial No. 648,217. t a v This invention pertains to grinding mach nes and/the present application consti- ,tutes a division of my pending application,

Ser. No. 551,008, filed April 10, 1922.

--One of; the primarypurposes of my present invention is to provide for accurate dressing of the faces of the grinding-wheels, and with this end in view, my invention contemplatesthe provision Y of a wheel dresser, andfa; novel mounting therefor whereby the dresser may be positioned inproper relationto the wheels toinsurethat they beuni formly and accurately dressed. I Another; object is to provide an adjustable abutment for limiting the approaching movement of the grinding tools sothat they will be accurately ;;positioned with relation tothe wheel dresser whenever the dressing operation isperformed. v

Other objects and advantages of this inventionshould be apparent as the same becomes betterunderstood by reference to the following description, when considered in c nnection -with the accompanying draw- Referrmg tothe drawings:

. v.a-Fig. l is areal elevation, of'a machine embodying my invention; 1 s a v I Fig. 2-:is an end elevation looking toward the left at. Fig. 1

ig, 3 is a fragmentary plan view of wheel dresser mounting; and,

5 Fig.4 is a vertical sectional view taken on line 44 oft-Figure 3. I

'Byreference to theqdrawings it willbe observed that the machine comprises essentially' a-frame or base portion 4 upon which the various operating mechanisms: are mounted, as will be' later explained. The upper face of the frame at each side of the center thereof isshaped to provide aguideway fi, andupon each of these guideways thereis.reciprocably disposed a carriage; 6 provided with suitablebearings in; which the journaledr-U'pon theinner end of 'each of these shafts there is .mounted a grinding weel 8 The shaftsmayfbe equipped with mountejd thereon ;are; moved 7 toward 7 and from acho her :by. suitablewm moperated from a rock shaft 1 which is nor- .the face of one of the. wheels. I observed hom n 1 that therod 25 isIproa weight 10 suspended, therefrom. The rock shaft isjequipped witha' pinion,- 12

meshing with a rackf1'3, carried by one of the carriages 6, andwith a rack bar 14 pivotally connecte d with the other carriage, as

will be apparentfrom Fig. 1.

The shaft 11 is rocked in a clockwise direction, view ng. Fig. 1, to move the grlndlng toolsaparhby means of cam '15 2) fixed upon a continually rotating shaft 16 and engaging a stud projecting laterally from an arm 18 fixed on the shaft l1,'but at the opposite side of the machine from the armiilO. Manual actuation of the shaft 3 a gainstthe action ofthe weights 10 may be effected when desired bymeans of a hand leverl9,-'fixecl on the shaft 11 djacent to the arm 18. Theshaft 16 isdriv en' from" a train of gearing to which power is trans ,mitted through a drive-shaft 2 l from a variable speed pulley 22 driven by a belt in the usual manner.

of the grinding tools during normal loperation of the machine, islirnited' by an abut- The approaching movement ment bar, equipped with a micrometer'ad .Forlthe purpose of dressing the facesof the wheels when .suchbecomes necessary, I

have mounted at rear of the machine up} on a ,bracket 23' af stan'dard 24 carrying a wheel dressei rod 25, which is providedv at itsforward end with a wheel dresser 26pro- .jecting at one side of the rod andnormally disposed outside the perimeter of, the vgrindustment, all as explained in my prior ap- 'plication, previously. mentioned.

ing-wheelsB, as shown in 2. When dressing of the wheels becomes necessary, thGTOCl 25-is,sl id longitudinallyforward to Zdisp ose: the wheel dresser between thewheels and. in position to' engage andzoperate upon It will be videdwith longitudinally extending grooves 27 and 28, in which-apin 29 is engagedi to prevent rotation of the rod. When one of the wheels has been dressed, the pin withdrawn, the rod? 25 is given ahalf turn the dresser'in position.

In order that the dresser may be adjusted to dispose it in proper alignment with the face of the wheel to be dressed, the standard 24 is adjustably mounted upon the bracket '23, and as will be apparent from Fig. 3,'th e adjustable mounting comprises a fulcrum pin 31 projecting upwardly from the bracket into a socket in the standard, and a pair of bolts 32, alsop'rojecting'upwardly from the bracket through slots 33 formed in the stand ard.

The bracket is also provided forwardly of the standard with a, pair of up wardlyextending ears or lugs 34, each of which is equipped with an adjustable screw 35 bearing against the forward'face of the standard. l/Vhen adjustment of the dresser is required,the bolts 32 {are loosened, wheref upon by turning the screws. 35 in the requisitedirection, the standard may be swung in a horizontal plane about-the fulcrum pm 31 center to properly align the dresser.

with the wheels to be dressed, whereupon the bolts 32 are again tightened to lock the dresser in its adjusted position. In order to permit the introduction of the dresser intoposition between the wheels, the wheels are first backed oil" or separated, and when the dresser has been properly positioned, they are permitted to approach until that wheel toward which the dresser is faced is disposed in position to be operated upon.

For the purpose of limiting the approachii'igmovementsof the wheels, so that the'one being operated upon will be disposed in just the proper relation with respect to the dresser, there is mounted upon the shaft 11 an'arm 36 provided at its ou'terend with an adjustable abutment screw disposed in vertical alignment with an abutment shoulder 38 upon the machine frame. Since the arm and the wheel carriages are both connected with the shaft 11, it will be apparent that the approaching'movement toward the dresser of a wheel to be operated upon will be limited by engagement of the screw 37 with the shoulder '38 on the frame..' By adjusting this screw, the approaching movement may be limited to a fine degree of nicety, and if the dresser is positioned in exact alignment with the faces of the wheels to .be dressed, and exactly midway between them as'i'tshould be, when one of the wheels has been dressed, the dresser is reversed to operate upon the other wheel, and this wheel will likewise be dressed exactly like the first since the approaching. movement of this wheel to the dresser will likewise be controlled by the previously adjustedscrew 37.

The arm 36 is preferably clamped to the shaft 11, and if during normal grinding operation of the machine it' be desirable that the'wheels approach more closely together, than is desirable for dressing purposes, the arm may be loosened from the a wheel dressing operation.

shaft so that it will not interfere with this approaching movement. During the dress ing operation the clutch through which power is transmitted to the machine. to

,reciprocate the dressing wheels, is thrown out so that no reciprocation of the wheels takes p lace, but the wheels will be revolved for dressing purposes by power applied to their respective driving pulleysS).

The details of construction illustrated and described are obviously capable of considerable modification without departing from the spirit of the inventiomas defined in the following claims. I j

I claim: 1. In a grinding machine'having opposed grinding wheels movable toward and from one another, means arranged-adjacent said wheels for wheel dressing purposes and adapted to be moved into the-normal path of movement of said wheels, and means'for limiting movement of one of said wheels toward the said wheel dressing means during 2. In a grinding machine having a grinding wheel normally movabletoward and from an operating pos tion, a wheel dresser wheel and movable into the path of movement thereof, and adjustable means for {restricting the normal movement of said wheel toward 'sald operating positionwhen mounted to one side of'the axisof saidsaid dresser is moved into the 'pathof of said wheelstoward said operating posipath of normal movementthereof. 1

. 4. In a griding machine, the combination. of a frame; a pair of carriages slidably mounted thereon, a grinding wheelmounted oneach carriage, mechanism normally operative to simultaneously move said carriages toward and from each other, dresser means common to both of said wheels and movable into wheel dressing relation with respectto the wheel faces to be dressed, and an ach justable abutment independent of 'said wheels for limiting the approaching movements of said wheels for wheel dressing purposes.

5.'In a grinding machine, a'combination of a pair of grinding wheels, means, for; moving said wheels toward and fromeach other, a wheel dresser arranged for operativeengagement with either wheel for dressing the grinding faces thereof, and an auxiliary adjustable stop mechanism independent of said tions when said dresser is moved into the wheels whereby the approaching movement of said wheels may be aclpistably regulated for-wheel dresslng purposes.

6. In a grinding machine, the combination" shaft to cause the separation of saidwheels, an arm normally loosely mounted on said shaft but adapted to be clamped thereto, and an adjustable abutment screw carried by said arm whereby the approaching movement of said wheels may be limited for wheel dressing purposes.

7. In a grinding machine, the combination 'of a pair of co-axially arranged grinding wheels, means for moving said wheels toward and from each other, a wheel dresser mounted at one side of said wheels and adapted to be moved into operative position between said wheels, and adjustable means for determining the position of said wheels on their movement toward said dresser when the latter is between said wheels.

8. In a grinding machine. the combination of a frame, a pair of grinding wheels slidably mounted in carriages thereon, means for moving said carriages toward and from each other, a wheel dresser supporting bracket disposed at one side of said frame, a wheel dresser carried by said bracket and adapted to be moved into operative position between said wheels, and an adjustable stop mechanism cooperative with frame and said means whereby the position of said wheels may be regulated for wheel dressing purposes.

9. Ina grinding machine, the combination of a frame, a pair of grinding wheels r0 tatable in opposed parallel planes on said frame, a bracket on the frame, a standard supported upon said bracket, a wheel dresser carried by said standard and moveable transversely across the opposed faces of said wheels, and means including a fulcrum pm and a pair of ad]ust1ng screws whereby V the position of said standard with respect to said wheels maybe adjusted.

10. In a grinding machine, the combination of a frame, a pair of grinding wheels mounted on saidframe, a standard, a fulcrum pin about which said standard may be adjusted in a horizontal plane, a horizontally disposed rod having a plurality of grooves and slidably and rotatably mounted in said standard for movement across one of the opposed faces of said wheels, a wheel dresser carried by said rod, a removable pin adapted to engage each ofsaidgrooves to lock said rodagainst rotation, said grooves being so arranged in said rod that upon removal of said pin from said grooves the rod may be rotated to points where said dresser will engage either wheel and be locked thereat by said pin against rotation, and

'means for locking said standardin adj usted position.

RALPH 1). GARDNER.

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