US2157779A - Method of manufacturing grinding - Google Patents

Description

G. E. vANE 2,157,779 NG GRINDING Wl-ITJELS Of ABRASIVE MATRTAL May l9, 1939.

METHOD OF MANUFACTUR Filed Jan. '28, 1936 INVENTOR CLM'CL ATTORNEY Patented May 9, 1939 A vUNITED STATES PATENT ori-#Ice MTHOD F lldANUFAC'lU'R/ING` GRINDING WHEELS 0F ABRASIVE MATERIAL George E. Vance, Springfield, Ohio, assigner to T-h Safety Grinding'Wheel & Machine Company, Springfield, Ohio, a corporation of Ohio Application January 2s. 1936, serial No. 612,212

2 claims. (ci. 51-278) 'This invention relates to a method of making move abrasive material from the heavy portion grinding wheels of abrasive material. and place it on the light portion until the mold In the manufacture of grinding wheels'the is in perfect balance. The next step is to remove abrasive material is pressed into a mold and then the mold from the turn-table -and compress the 5 baked. It often happens, however, that by this green material in the mold, and the next step 5 process of manufacturing the wheels generally is to then bake the material which can be accomare out of balance andit has been customary to plished by either baking it in the mold or prefbalance the wheels after being baked by chipping erably removing it from the mold.

awayportions of the heavy side of the wheel, As a result of this method the wheel after which is unsatisfactory, as it is very diillcult to being baked is in perfect balance'and obviates 10 balance the wheels in this fashion and itis essenany necessity of chipping away portions of the tial that the wheels should be in as perfect balbaked wheel for balancing purposes. ance as possible'. If desired, any suitable scale indicating mech- The 4object o'f this invention is to provide a anism may be used in connection with the appal5 method whereby the wheel is balanced before it ratus employed for carrying out themethod, 15 is baked after the green abrasive material has which mechanism will be operated by the turnbeen placed in the mold and before being coxntable' in any suitable way, when the table is pressed in the mold. rotated. If indicating mechanism is not desir- In the accompanying drawing: able, the turn-table may be omitted and the Fig. 1- is a top plan view of an apparatus for mold tiltably mounted upon a spindle carried by 20 carrying out the method.- the base.

Fig. 2 is a section on the line 2-2 of Fig. 1. While the apparatus used in connection with Fig. 3 is a side elevation of the apparatus.4 carrying out this method has been described as Fig. 4 is a detail of a portion of the base and a including 'a turn-table upon which the mold is portion of the mold supporting frame, showing mounted so that the mold may be turned to dif- 25 one of the knife edge bearings. ferent positions in order -t'o better determine the Referring to the drawing, I represents a suitheavy and light sides, this turn-table is not abable supporting base and 2 is a frame which is solutely necessary. but the mold may be mounted tiltably mounted upon standardsA 3 projecting upon a stationary spindle upon whichit can be upwardly from the frame .by twov oppositely arrotated to determine the' heavy and light sides. 30 'ranged knife-edged bearings l. :A yturn-table 5 Further, the particular form of balancing device is rotatably mounted upon the frame 2 through descrlbed'isnot'absolutely essential but any well the medium of ball bearings 6, the lower race 1 known form of horizontal balancing may be ofl which is carried" by cross-members 8 secured employed. Y to the frame 2. The turn-table has a centrally Having thus described my invention, I claim: 35 arranged spindle 9 upon which is rotatably 1. The method of manufacturing a grinding mounted the mold lli which receives the abrasive wheel oi abrasive material consisting in placing material represented at Il. By reason of the` the green abrasive material in a balanced tilt- 2 fact that t he supporting frame is mounted upon able mold, rotating the mold to determine the 40, the base by the oppositely arranged knife-edged heavy and light sides thereof if any exist, then 40 bearings it will be seen that the mold will be removing abrasive material from the heavy portiltably mounted upon the base. In operation tion of the mold to a lighter portion to balance the frame is nrst balanced upon the` supportthe mold and material, then pressing the mateing base by any suitable means such as applying rial in the mold, and thereafter baking the weights of any suitable character to the light material. l l

side thereof which would bring the turn-table 2. In an apparatus for manufacturing a grindinto balance and the mold is then balanced in ing wheel, a base, a pair of oppositely arranged position byllkewise applying weights of any suitstandards on said base, a supporting frame able character to the light side thereof. The mold mounted on saidstandards by knife-edge bearis then nlled with green abrasive material and ings, and a mold supporting turn-table rotatably 50 after the material has been placed in the mold. mounted upon said supporting frame. if the mold tilts due to the fact that one portion Y is heavier than the athen-the next step is to re-.- GEORGE E. VANCE.'

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