US 2872758 A
Description (OCR text may contain errors)
Feb. 10, 1959 v. N. HOERST MOUNTING FOR GRINDING DEVICES Filed Oqt. s, 1957 INVENTOR Valentine Nfiloerst BY flbhn a? M ATTORNEY eat.) are. new E MQUNTKNG FER GRHNDENG DEVIQES Valentine'Niclkolas Hoes-st, Cincinnati, Ohio Application @etoher 3, 1%7, Serial No. 687,943
3 Qiaims. (El. 51-166) This invention relates to a mounting for grinding devices.
In my copending application, Serial No. 661,665, filed May 27, 1957, there is described a grinding device for grinding the cutting edges of machine tools such as metal cutting bits. Various mounting means for grinding devices of this type have heretofore been proposed. Most of such mounting means include simply a base to which the device may be secured.
It is an object of this invention to provide a simple mounting for a grinding device which is freely adjustable and readily manipulatable to facilitate, in a large degree, convenient and satisfactory operation of the device.
The invention resides in a mounting comprising a base, and a grinding wheel support adjustably mounted on said base, said support having a pair of arms independently and hin edly carried thereby, said arms being arranged to carry thereon a tool-holding device.
The invention will be described with reference to the accompanying drawing, in which Figure l is a side elevation, partly in section, of a mounting in accordance with the invention,
Figure 2 is a plan view of the mounting, and
Figure 3 is an enlarged sectional elevation of an associated device for repairing the surface of a grinding wheel.
In the drawing, 1 is a base having an elevated platform 2 with inwardly inclined side surfaces 3. A grinding wheel support 4 is adjustably mounted on the platform 2 and comprises a frame 5 having a groove 6 in its bottom surface complementary in shape and dimensions to the platform 2 and its side surfaces 3 and arranged to receive the same. it will be apparent that the frame 5 may slide longitudinally along the platform 2 but is otherwise restrained from movement with respect thereto by reason of engagement of the groove 6 with the platform. Manually operable means, indicated at 'i, may be pro vided to impart sliding movement to the frame 5 with respect to the platform.
Means for locking the frame 5 in any desired position with respect to the platform comprises a plurality of set screws 8 carried by the frame 5 and adapted to fric' tionally engage a side surface 3 of the platform. Preferably, a strip of suitable material constituting a shim 9 is interposed between side surface 3: and the complementary surface of the groove 6. Shim a} may be "formed of suitable wear resistant material, such plastic composition. Shim 9 is adapted to take up any play between the surf-aces 3 and the complementary surfaces of the groove and to provide an effective clamping member for fric tional engagement with a surface 3 under pressure from the set screws 3.
A grinding wheel it) is mounted on shaft 11 carried by bearings lilo on frame 5. it may be driven by a motor 12 also mounted in frame 5 through suitable pulleys 13 and id and belts 15. A water tray 16 into which the Wheel 1d extends is also mounted in frame 5. Tray 3.5 is preferably removabie for cieaning replacement purposes. As shown, it is seated. in arecess. ii! in the frame and is rigidly held in such recessby aplate 18 which is securedin place by a screw 19. It will be apparent that the screw 19 may be loosened to permit dis- 5 engagement ofv theplate with the,tray:and rernovalof the latter. A guard. 35 for the grindingwheel is mounted on a lug 36 fixed to. frame. 5.
A tool holding. device, which may be. similar to;that shown in my aforementionedcopending. application, is
indicated at 20. ltis arrangedto supporta tool 21 for engagement with the grinding wheel 10. It has a mount-. ing stud 22 which, in accordance with-the.'presentinveru tion, is arranged to bereceived in a cup. 23 carried by an arm 24.. Arm Mishinged. at 25 to alink ;26'which in turn is'hingedat 27 to alug 28fixedto frame 5. The vertical position of stud 22 and device may be adjusted with respect to cup 23 by means of a set screw 29. A set screw 3t) extends through the side wall of cup 23 to rigidly lock the stud 22 in position therein.
20 Arm 24 and its associated mounting on frame 5 is so positioned as to support the device 20 with the tool 21 carried thereby in axially right angular relation to the axis of grinding Wheel 10. It will be apparent that the hinged connections and 27 will permit presentation 25 of the head of tool 21 in proper desired relation to the peripheral surface of grinding wheel 10 for grinding engagement thereby.
Means are provided for applying additional support to the device 20 when in grinding position and comprises 30 an arm 31 hinged at 32 to a lug 33 fixed to frame 5 at a point below and somewhat laterally ofiset to lug 28. Arm 31 carries at its free end a vertically disposed jack 34 which is extensible and retractible to engage the bottom surface of device 20 and thus support the latter in any 35 selected position. It will be observed that the lower end of jack 34 is adapted to be supported upon a main supporting surface 39a.
Means are preferably provided for repairing the peripheral grinding surface of grinding wheel 10 which may 40 become hollowed out from grinding operations. Such means comprise, as shown, a screw-threaded rod 38 V mounted on guard 35 as by means of a U-shaped bracket 39. The lower end of rod 38 extends through an opening 49 in guard 35. The rod is axially adjustable with respect to its supporting bracket 39 by means of a pair of lock nuts .1. The lower end of rod 38 carries a detachabie bit or cutting head 42 which is adapted to engage the surface of wheel 19 and, on revolution of the wheel, remove undesirable ridges thereon. Means are provided to permit lateral movement of the rod 38 with respect to the surface of wheel 10 in order to position it in any desired location for engagement with portions of the wheel surface requiring treatment. Such means comprises a slot 43 in bracket 39 through which the rod extends and washers or the like 44 bridging the slot on each side thereof for engagement by the nuts 41.
Since the treatment of the grinding wheel surface to render it smooth by removal of circumferential ridges thereon will reduce the diameter thereof, it may be desirable to adjust the position of guard 35 With respect thereto. To this end, the mounting of guard 35 on lug 36 may be effected by means of bolts 45 extending through registering slots 46 and 47 in guard 35 and lug 36 respectively. It will be apparent that, by loosening bolt 45 the guard 35 may be moved closer or farther away as desired from wheel 10 and, on tightening bolt 45, locked in such selected position.
The base 1 may be provided with a tray 48 to receive a spare grinding wheel 10 as indicated. 4
It will be apparent that the supporting arms 24 and 31 with their associated mounting arrangements, provide a highly flexible support for the tool-holding device 20 which will permit convenient application of the tool head to the grinding surface of wheel 10 in any desired position.
I claim: 7
1. In a grinding apparatus having a grinding wheel and a tool holding device, a mounting therefor comprising a base, a frame mounted on said base and supporting said grinding wheel, an arm arranged to carry thereon said tool holding device, a link hinged to said frame and to said arm to permit adjustment of the arm independently hinged to said frame, and a jack carried by said second arm and arranged to engage and support said tool holding device.
2. A mounting for a grinding apparatus as defined in claim 1, said frame being slidably mounted on said base, and means for locking said frame to said base.
3. In a grinding apparatus having a grinding wheel and a tool holding device, a mounting device therefor comprising a base, a frame mounted on said base and References Cited in the file of this patent UNITED STATES PATENTS 1,102,344 Krug July 7, 1914 1,148,524 Murray Aug. 3, 1915 1,162,304 Nevens Nov. 30, 1915 2,351,881 Schottland June 20, 1944 2,501,374 Bliy Mar. 21, 1950 2,627,262 Weynand Feb. 3, 1953