US1788249A - Grinding and polishing machine - Google Patents

Description

T. F. PHI-LlPPl GRINDING AND POLISHING MACHINE Filed June 24, 1926 7Sheets-Sheet '1 GRINDING AND POLISHING MACHINE Filed June 24, 1926 7 Sheets-Sheet 5 I: I i

4-7 V Fi 6 Jan. 6, 1931. T. F. PHILIPP] GRINDING AND POLISHING MACHINE Filed June 24 192 7 Sheets-Sheet 4 w r 0 1w 4 mfu v .7 i U my meat/are 4% &

Jan. 6, 1931. T. F. PHILIPPI GRINDING AND POLISHING MACHINE Filed June 24 192 '7 Sheets-Sheet 5 g e 7 a @m M n: 6 J a, 6 7 J a x H, 2 1 MW mwwmmw W 5 vxq 134* Ru v l E Z Q. N; r v d, 7 6 6 7 fl 1 7 w z k F 8 7 0 J J Jan. 6, 1931. T. F. PHILlPPl I 1,783,249

' GRINDING AND POLISHING MACHINE I Filed June 24 92 ISheets-Sheet 6 .97 A? fl-1 Zfieadwefhaf/ Jan. 6, 1931. P1 1,788,249

GRINDING AND POLISHING MACHINE Filed June 24 192 '7 sheets sh eet 7 l men i Patented Jan. 6, 1931 rrmgonoiin m mm or'sr.inours,"m rssovm f GRINDING-AND romsrriii'e MACHINE w 7 Application fi ea iu e 24,192e "Serial n; 118,261. 1

This invention relates to new and useful improvement in grinding and pohshlng machines, the objects lofrzthe invention. being to 7, provide aamachine'wherein the Work fed to' the grinding-and polishing means is simultaneously vibrated; laterallytoavoid straight I line "grinding or polishing effect on the lfin- 'ished 'surface-ofithe Work;

' Further objects of the invention are toset the polishing or grindingjwheels at an angle so'that the line of rotation of the peripheral .7

faces ofsaidwheels are 'disposedat an angle c able relative to said-units to-successivelyv each unit and to discharge said Work after to the line of travel of the Work, thereby'further'ins'uringnagainst straight line efi'ect of' the'finished work. i I

Still; further'obj'ects of the invention are to provide a multiple of the worlr'engaging units and to providega Work carrier movbring the Work in operative engagement with beingoperatedupon by all of said units Other objects of the invention are to build said units so that they maybe operatedand fro 'ficient operation and production;

Viththese and" other objects" in view, my 5 adjusted independently of each other and may 'bearranged in seriesof any desired number to progressively operate "upon the I 15-15-0f Figure-'13. Y

workfed thereto. a

of said units outof operative engagement with the 'WOI'k and to 'retainsaid units in such disengaged positions;v

Additionalobjects of'the inventionare to provide a machine of the class describedhaving its variousinechani'sm disposed to operate in cooperativerelationvwitheach other and provided Wltll. means for readily adqustingsaid machine in order to.:assureef-- invention consists in certain novel features hereinafterinMe fully describedand claimed,

on d illustrated in the accompanying draw ings, in which Figure .2 is a front elevational vievv partly' broken away. 1 I

for, moving the tool out of operative-en:- gagement withthe work.

16 -16 01 Figure 13.

taken on 'lineEF-ii of Figure 2.

Figure 3 isi a verticaltransver'se section neHof FigureB v j V lgure Erisa vertical section taken on, line 5-5of Figure r 1 Figure iis avhorizontal section taken'on I Figure .6 is aivertical section talrenonline V :Ge QofFigure. V

- is a. vertical cross section; taken Figure 8 is a vertical line*8 8of Figure 3.1;:

5 Figure 9is a vertical crosssection taken on :lIHQ Q -Q of Figure 3. f

Figure 10 is awertiealcross section taken on line l010 of Figure 3 V V Figure-11 is a vertical cross section taken Figure 12 is a detail View showing means Figure 13,;is 'a' vertical transverse section of the machine showing modified balancing means. i

other. objects requiring; ground or vpolished surfacesi g --f Referring by; numerals tOnthG accompanydinally' disposed bed "frames or pieces on which are: supportediat, suitablespaced inter- 'vals operating units 11. Eachiunit comprises a stationary' or supporting section :11 and a ,movableior. adjustable 'sectionfll andthe latterhas agrinding or polishing member 12 .whioh isgdisposed in cooperative relation with: a work carrier 14 which latter is gprefgcross SBGtlOIl taken on such as the base-plates ot'electric'irons or ing draivings; 10 indicates a pair of longituof: construct on and arrangement of parts,-

erably in the form of a belt or endless conveyor operating over pulleys 16 and 17 Pulley 16 is mounted on a shaft 18 having bearings in supports 19 fixed to and disposed transversely to the forward ends of bed plates 10. Pulley 17 is fixed to a. shaft 20 having bearings in supports 21 which are fixed to and project upwardly from the rear ends of bed pieces 10. Pulleys 16 and 17 are disposed to one side of bed pieces 10so that belt 15 operates or passes immediately under the grinding or polishing members or wheels 12.

Shaft 20 is driven in any suitable manner, preferably by suitable reduction gearing which consists of a gear 22 fixed to shaft 20 and meshes with a pinion 24 of a worm gear drive 25 which is enclosed in a suitable housing 26. A shaft 27 extends from said housing 26 and is journaled in bearings 28. A gear 29 is fixed to said shaft'and engages a pinion 30 which is carried by a shaft of a motor A. An idler pulley 31 is used to take the slack out of the belt.

Each operating unit comprises a vertically disposed web frame 32 forming part of movable section 11 disposedjtransversely of the bed frames 10 and provided at its forward end with an upper bearing 34 and a lower bearing 35 for receiving a vertically disposed column 36, the lower end of which is sup ported in a box 37 carried by one of the bed plates 10 and the upper end of which carries a bracket 38. The rear end of frame 32 is provided with an integral bearing 39 which receives the upper end-of a vertically disposed column 40 and said-frame is provided with a lower bearing 41 receiving the lower portion of said column 40. The lower end of this column or post is disposed in a box 42 which is carried by the other one of said bed pieces 10.

A suitable shelf 44 is formed on the rear upper portion of frame 32 and supports a motor B which drives a shaft 45 extending forwardly and transversely of bed frames '10 and journaled in a bearing 46 carried by bearing 34. The forward end of said shaft 45 projects from bearing 46 and has mounted thereon in any'suitable mannerthegrinding or polishing element 12 Wl'llCh; nthe present instance, 1s 1n the form of a wheel '47 of suitable abrading material and is disposed immediately above the upper portion of belt orwork carrier 14. Motgir B and shaft 45 arearra'nged to have their axes inclined to one side-ofa line drawn at right angles to the line of travel of the belt 14. -Thus the line of movement of the peripheral face of the'whe'el 47 is set'at a slight angle to the line of travel of belt 14 and the work carriedthereby, whereby the scratch lines produced on the work by said wheel will be inclined from the longitudinal axis of the work H of columns 36 and 40.

In order to eliminate the straight line effect on the surface of the work, belt 14 is vibrated laterally with respect to the grinding or polishing wheels 47. This vibration is effected by means of a table 48 which is disposed below belt 14 and is slidably mounted on rods 49'wl1ich are carried by and project laterally from a frame 50 forming part of fixed section 11 which latter is supported on one of the bed pieces 10 and projects upwardly therefrom and has a portion 51 extending rearwardly and transversely thereof and is fixed to the other one of said bed pieces 10.v

This table 48 is provided with a centrally disposed I-shape slot 52 through which project the upper portions of a flanged roller 54 which is revolubly mounted in a recess 48 formed in said table 48. The peripheral face 54 is engaged by belt 14 whereby said roller 54 forms anti-friction support for said belt while :the flanged portions 54 of said roller 54 engage the edges of said belt and form guides therefor. I

lh-ojerting l'iorizmitally and rearwardly from table 48 is a pair of lugs or cars 55 ran'ying a pin 56 which is loosely engaged by apertured end 57 of an arm 58. 'The rear end of this arm engages an eccentric 59 (llSlQOSOi'l longitudinally of the machine and is supported in bearings 61 of frame portions One end of this shaft (it) has time thereto a sprocket wheel 62 over which operates a sprocket chain (34 which is driven by asprocket wheel 65, the latter'beiiu); fixed to shaft 27. In this manner shaft (50 is rotated at predetermined speed thereby actuating. arms 58 through eccentrics 59 and causing said arms to vibrate laterally with respect to belt 14. The flanges 54" of roller '4 engaging the edges of belt 14 cause the latter to more with said table 48. thereby imparting vibrating lateral motion to snid belt and the-work carried thereby.

Column 36 is loosely disposed in stationary hearings S'Y'and 37 which form partof frame 50 and column 40 is loosely arranged in stationary hearing 42. In this manner columns 36 and 40 and frame 32 are adj able in vertical plane so as to bring wheel. 47 in proper operative relation with the work on belt 14. In order to counternalance \ne weightame and parts supported thereby. a heap": coiled spring (56 interposed between stationary support. such as 67. and part of the movable section of the operating unit. in the present instance. frame 32. The upper end of this springs seated in a sprocket formed in said 3"? line and the lmver end of. said spring: hears-against a collar or hand wheel (38 which S IP\..- seated on the threaded member, &9 resting on support (57. By turning wheel (38 in i the proper direction, said wheel ean be moved in a vertical plane, the'rebyjinereasing oi de' creasingthe tension of'spril'igfiti and pro fi 111g proper-1counterbalance for the ,mo'rable',

parts of the operating unit, na1nely,; frame 32 and parts supported thereby; -Framefii'l and the mechanism carried thereby are adjustedin-a vertical pla'neby means of a screw 71 see Figuresfl and 11) whichh'as threaded engagement with a horizontalextension 38 3 "of bra chet 3S and has its lower endbearing rock shaft 78,- .which latterfextends the full length ofthe machine and has'one-end jounnaled in one of the secti-ons'll and its opposite end 111 a bearing formed by cross arm 79,

which latterisdisposed near supports 1.9

The upper. endof screw 71 is provided with a hand wheel 7l by-means of whichsaid screw can be turned-so as to move bracket 38Yup j wardly ordownwa-rdly desired. Bracket 38Ibeing fixed to the upper end of column 36,

' in a verticalplane, thereby lowering or rai'sng Wheel47 relatiye tobelt or worlz earner decreased as'. desired, thereby regulating the it is obvious that said coluinn'j as well as frame 32 which is fixed thereto Will be moved Inorder tomaintain wheels 47in pro-per operative engagement with the work posi tioned on belt l l itis desirable that said wheels be held in contact with theh'work under spring pressure. 1 This springtpressure is supplied by a coiled spring-8Q ertically disposed above the horizontal-' portion 78 and having its lower end seatedthereon.

threaded upper end of arod32. whichvpasses through. an 'aperturegin said extensi on 38 and has itsxlo'wer end attached to; a portion of frame 50 as indicatedat 843 (see Figure 11) Bv turning'wheel 81 in the proper direction, the tension of spring 80 can be increased or pressure with which the wheels? is applied ment of screws 7land brackets"88; The

to the work. l Each operating unit 11 has its own counterbalancing means 661mm its own adjusting means 71. so th at each operating unit caribe adjusted independently of each other and each operatingunit ris provided .with individual tension regi'llating means to control the operating pressureofthe respective abrading wheel l'i. s

The operating 'wheels 47 of allof said units can be simultaneously movedout oi engage merit with the workby' o-peratin 7 8 so as to actuate arms 74 and movethe for ward ends 72 thereof-upwardly. rlhe upe ward moyeme'nt of Wheels TQ-causesthe n'rovable sectons l-l of each .operat moved upwardly through the T3 teren gage actuationof rock shaft 78fis accomplished by nnitto be aj handle which is fixed. to said shaft and can be manually operated. Whenfsaid In order to preventdust, whichis always present-1n operating-grinding and pohslnng machines, from entering the bearings in which posts- 36 and 40 operate, the stationery bearing 37 is provided with a sleeve 89iwh ich extends. upwardly therefrom and has its upperend slidably arranged in the enlarged bore90 formed in bearing 35. The length of this sleeve and: the length of recess 90. are

such that when theinovable section 11 occupies its uppermost position-,rthe upper end of sleeve89 occupies a position inthe lower end of bearing 35 so that said bearing is sealed. at all times, thereby preventing dust fromentering the same. Similarly, bearing 37 is providedwithla sleeve 91which projects upwardly and has its upper end slidably arranged inanenlarged boreg92formed in bearing 38 and the u 'iperendof said slee've occupies the lower end of bearing 38when saidniovablesection is moved to its uppermost position so that at notime is the upper portion ofcolumn- 36 exposedto dust.

Stationarybearing 42 is provided with a sleeve 94, the upper end of which operates in an enlarged' bore 95 of bearing ll and protects said end of column l0 from dust. Bearing' ltl of shaft 45 is adjustable-in vertical I plane on column 37vby means of a set screw 96 which locks saidshaft in proper :position onthe horizontally disposed upper portionof beltll at -one end of the n ga chinea-nd is 7 fed forward "by said belt-by means of cleats "or projections 98 Wl1ich are disposed in positlon at spaced intervals on said beltand are adapted to engage the work and carry 1t 1'01.-

ward near the worken a' in wheeled? and f! I? I? afterbeing operated upon by; all of the wheels the work is discharged from 'the be'lt *at the opposite end ofthe machine where a pluralltyof wheelsl l'i is used, These wheels may beofdiiferentgrades gradually increasing in fineness asithe work progressesthrough themach ne a A suitable mounting 99 is supported on each frame "50 adjacent to each jwheelfl? and is'achustable'so asto b17111? a dresser wheel 100, carried by. each moimting 99, in proper engagement with" the periphery of the corresponding wheel 47', wherebythe latter may be maintained at all times in proper grinding condition. 7

Where the work to be operated upon has surfaces to be ground or polished di posed different horizontal plants as, for instance, in case of automobile bumpers having their ends curved or offsetinwardly, t re sup porting mechanism for wheel 47 has to have a greater amount of travel than where the machine is used for grinding straight surfaces or polishing base plates of e ectric irons or other similar objects. In such cases it is not desirable to use coiled springs 66 to counterbalance the vertical movable sections 11 on account of the excessive pressure produced by the compression of springs 66.

A modified arrangement is shown in Figures 13 to 17 wherein the spring 66 is dispensed with and each movable section 11 is counterbalanced by a suitable weight 101 which is adjustably mounted on the end of a long arm 102 of a lever 104. This lever is fulcrumed at 105 in a bracket 106 which is secured by suitable fastening devices 107 to a stationary support, such as frame 50. The inner or short arm 108 or lever 104 is pivotallyconnected at 109 toa pair of links 110 which extend downwardly from said lever and are connected at 111 to the opposite sides of the lower end of a tubular member 112. This member has its upper end screwseated at 114 in the upper portion of movable frame 32 and supports the latter and the mechanism carried thereby in position. Thus the adjustable section 11 is movable in vertical plane so as to movewheel 47 suitable distance relative to work carryingm-ember 14 without changing the pressure exerted by the counterbalancing means and at the same time provide sensitive automatic adjustment of wheel. 4? so that the latter will take care of any variations in horizontal plane of the work. Each link 110 is pr vided with a series of apertures 115 disposed substantially in vertical plane whereby the distance between pivotal points 109 and 111 can be increased or reduced as desired. The pivot 111.0011- sists of a pin 11 6 which is seated inapertures 117 formed in tubular section 112 and is designed to engage anyone of said aper ures 115. A cotter pin 11 8 locks :pin ,t accidentaldisplacement. The pivotal connection 109 comprises a pin which is ted in the upper links 110 and engages a ball bear ing 120 arranged in the outer arm 108 of lever104. The use of ball beari g 120 reduces the friction and prolono's a; lv

device. Ball bearingl20 is Q dust by felt washers 121 arr. Q, of said ball bearing and-held n p on by washers 122, which are spaced. from lin s 110 by spacers 124. Acotter pin 125 is used to lock pin 119 in position. The pivotal point i 105 consists of a-pin 126which is seated in spaced ears 106 and eng ges one end of lever 104. A ball bearing 12. is preferably used between pin 126 and lever 104 and a pair of felt washers 128 is interposed between lugs 106 and 104 and form protective seals for said bearings. A cotter pin 129 or other placement of pin 126. The use of ball bearings 120 and 127 is desirable inorder to reduce friction at these points which would be considerable otherwise on account of the suitable lockin means is used to )revent disheavy mass of material involved in rendering the section 11 movable in vertical plane for permitting automatic adjustment of the grinding orpolishing element 12 with respect to the work operated upon.

A grinding and poli improved construction is highly efficient in operation and can be arranged as a single unit having only one grinding and polishing element or combination of units for progressively operating upon the work and is arding machine of my improved grinding and polishing machine Without departing from the spirit of my invention.

I claim:

1. In a grinding and polishing machine,

plurality of vertically disposed tubular bearings carried in spaced-apart relation by said support, a pair of uprights slidably mounted in said bearings, a frame fiXedto said uprights.

the combination of a stationary support, a

means cooperating with said frame and said support for counterbalancing and yieldingly supporting said uprights andsaid frame and parts carried thereby in position, a horizontally disposed shaft revolubly carried by one of said uprights and said frame, a work engaging wheel fixed to the forward end of said shaft, an extension fixed to one of said uprights, a threaded rod fixed at its lower end to said support and extending through said extension, a collar adjustably seated on the upper end of said rod, a coiled spring interposed between said collar and said extension for ex erting downward spring pressure against said upright and parts associated therewith, whereby said wheel is held in yielding eugagc ment with the work, and a work support disposed under said wheel for bringing the work into engagement with the peripheral surface of said wheel.

2. In a grinding and polishing machine, the combination of a stationary support, a pluralityof vertically disposed tubular bearings carried in spaced-apart relation by said support, a pair of-uprights slidably mounted in said bearings, a frame fixed to said up rights, and provided with downwardly open ingtubular extensions which enclose the up:

per ends of said bearings, means cooperating with said frame and said support for counterbalancing and yieldingly supporting said,

uprights and said frame in position, a horizontally disposed bearing adjust'ably mounted onone ofsaid uprights, a horizontally disposed shaft journallediin said last mentioned bearing, a work en aging wheel vfixed to the ferward end of said shaft, the rear end thereof being adaptedto lie-connected to a motor adapted to be mounted on said frame, a work support disposed under said wheel for holding the workin engagement with the periphery thereof, an extension fixed to the upper end of one of said uprights, a

vrod fixed at its lower end to said support and having its upper threaded end extending through said extension, a collar adjustably screw-seated on the threaded end of said rod, a coiled spring interposed between said collar and said extension for yieldingly forcing said wheel against the work, and an arm ful-,

zontally disposed shaft. bearing adjustably carried by one of said uprights, a driven shaft journalled in said bearing, a grinding wheel fixed to one endof said shaft, a work support disposed below said wheel and movable relatively thereto for bringing the work into engagement with the periphery of said wheel, a telescopic vertically disposed member fixed at one end to said frame andat the other end to said support, a coiled spring on said tele scopic member bearing at one end against said frame and fixed at'the opposite'end for counterbalancing and yieldingly supporting said frame and parts associated therewith, an extension fixed to one of said uprights, and

a coiled spring cooperating with said exten-' sion and said support for exerting spring pressure downwardly to bring the wheel in yielding engagement with the work, and

means for regulating the tension of said spring. I

4:. In a grinding and polishing machine, the "combination of a stationary support, a plurality of vertically disposed tubular bearings carried by saidsupport, a pair of up rights slidably mounted in said bearings, a frame fixed to said uprights, means cooperating with saidfr'ame:andsaid support for .counterbalancing and yieldingly supporting saiduprightsand said-frame and; parts carried; thereby, a, horizontally disposed shaft .revolubly carried byone of said uprights and said frame, work engaging wheelfixed to the forward endof said shaftna :WOl'k sup;

port disposed belowsaid wheel-for presenting thewQrk; into, engagement therewith, a horizontally and laterally disposed extension iixedgto one oflsaid uprights, and meansin- V eludingn spring cooperating 'with saidiextension andgwith said. support; whereby said uprights, IIRIIIQ'fiDCl parts carried thereby are yieldingly urged downward to bring the to said support. V

5. In a grinding and polishing machine, the combination of a stationary support, a

plurality of vertically disposed tubular bear-v ings carried by said'support, a pair of uprights slidably mounted in said bearings, a frame fixed to said uprights, means cooperating with said frame and said support for counterbalancing and yieldingly supporting said uprights and said frame and parts carried thereby, a horizontally disposed shaft revolubly carried by one of said uprights and said frame, a work engaging wheel fixed to the forward endof said shaft, a work support disposed below said wheel'for presenting the work into engagement therewith, a horizontally and laterally disposed extension fixed to one ofsaid uprights, and adjustable means cooperating with said extension and said support for yieldingly urging said uprights and frame and parts carried thereby'in one direction relative to said support and limiting the movement of said uprightsand parts carried thereby in the opposite direc tion, said means being adjustable to vary the yielding pressure.- 1 v 6. In a grinding and polishing machine,

the combination of a stationary support, a

pluralityof verticallydisposed tubular bear-V ings" carriedby said support, apairof uprights slidably mounted in said bearings, a

framefixed to said uprights, means-cooperating with said frame and said support for counterbalancing and yieldingly supporting said uprights and saidframe and parts cari I V ried thereby, a horizontally disposed shaft revolubly carried by one of said uprights and said frame, a-work engaging wheel fixed to the forward end of said shaft, a worksupport disposed below said wheel for presenting the work into engagementtherewith, a horizontally and laterally disposed extension fixed to one of said uprights, a memberadjustably mounted in said extension, manually operable means for engaging said member and moving said upright, frame, and parts car ried thereby upwardly to' bring said wheel "out of engagement with the work, and means wheel 'in engagement with the workand are I limited in their upward movement relatively j cooperating with said extension and said support for yieldingly bringing said uprights and parts carried thereby downwardly to bring said wheel against said work and for limiting upward movement of said uprights and parts carried thereby, said means including a rod fixed at one end to said support, and

acoil spring cooperating with the other end of said rod and in engagement with said extension.- v r In testimony whereof I hereunto afiix my signature this 14th day of J une, 1925. v

THEODORE F. PHILIPPI.

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