US2791070A

US2791070A - Abrading machine

Info

Publication number: US2791070A
Application number: US573506A
Authority: US
Inventors: Schaller Leo
Original assignee: ENGELBERG HULLER CO Inc
Current assignee: ENGELBERG HULLER CO Inc
Priority date: 1956-03-23
Filing date: 1956-03-23
Publication date: 1957-05-07
Anticipated expiration: 1974-05-07

Description

May 7, 1957 Filed March 23, 1956 L. SCHALLER ABRADING MACHINE 6 Sheets-Sheet 1 IN VEN TOR.

I L sdmll r 455M A it orne y.

May 7, 1957 Filed March 23, 1956 L. SCHALLER ABRADING MACHINE 6 Sheets-Sheet 2 INVENTOR.

Attorney,

' 6 Sheets-Sheet 3 Filed March 25, 1956 INVENTOR. L 90 SC/va l/er Attorney.

L. SCHALLER 2,791,070

ABRADING MACHINE 6 Sheets-Sheet 4 INVENTOR. [ea 52% a He r BY $5M Attorney.

May 7, 1957 Filed March 23, 1956 ay 7, 1957 L. 'SCHALLER 2,791,070

L ABRADING MACHINE Filed March 23, 1956 e Sheets-Sheet 5 3 lllr w u 3 h L. J

- IN VEN TOR. Lease/7a A ttorpey.

L. SCHALLER ABRADING MACHINE Filed March 23, 1956 6 Sheets-Sheet 6 INVENTOR. Leo SCha Her BY @M ATTORNEY ABRADING MACHINE Leo .Schaller; Syracuse, N. Y., assignor to The Engelberg Huller Co., Incorporated, Syracusa'N. Y., a corporation of New York ApplicationMarch23, 1956, Serial No. 573,506.

11 Claims (Cl. 51-.-138) work piece. The'conveyor belt is supported below the contact roll by a platen; and the machine embodies means for effecting relative movement between the contact wheel and the platen for accommodating work pieces of different thicknesses.

This invention has as an object an abradingmachine of the type described embodying a particularly compact and eificiently operating structure for abrading work pieces formed of ferrous or non-ferrous materials and especially work pieces having a small thickness dimension.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is bad to the accompanying drawings in which like characters designate corresponding parts in all the views.

In the drawings- Figure 1 is a front elevational view with-parts in section and parts omitted.

Figure 2 is aside elevational view looking to thelcft. Figure 1, with parts in section.

Figure 3' is aview taken on line 33, Figure, 2.

Figure 4 is a top planview of the platen.

Figure 5 is a view taken on line 55, Figure 4.

Figure 6'is a front elevational view of one'of the work hold down members.

Figure 7 is a view lookingtothe left of Figured Figure 8 is a top'plan view of the conveyor mechanism.

Figure 9 is a front elevational view of the conveyor mechanism, as indicated'by' the'line' 9-9; Figure 8.

Figure 10 is a View taken on a line corresponding to line 1010, Figure 2, of the switch actuating mechanism for controlling the circuit to the operating motor.

The base of the machine consists of a plate 2010 each side of which there is fix edly secured a vertically extending side plate 21 of general triangular shape, see Figures Z-and- 3. Thebase plate 20 is mounted on a plate fl3 positioned onbars it'd-supported by angle merribers- 25 extending transverselyof a tank structure 25 which serves as a support for the machine and also a cabinet for containing coolant liquid. The plates 21 are bent inwardly at their forward edges'to form inwardly extending flanges 28, see Figure 3; A bar 32 is fixedly secured to each. of the fl'angesZS as by welding and formsassembly beingh'eld together by cap screws: 35 threading into the bars 32.

ited States Patent 2,791,070 Fatented May 7, 1957 ICC A: vertically disposed frame. is .slidably mounted in these guideways, This frame consists ofv a U-shaped member having a front wall 36. and side walls 37. At spaced intervals, tubular members 38 extend transversely through the sidewalls .37 of the frame and are welded thereto. The outer projecting end portions of the tubular members 33 areslotted andguidebars 39 are positioned vided withla gib 40. engaging. the outer edgeof the con: tiguous bar 39,. and-thegib iii is adjustable by. screws. 41.

1l1e.frame.further includes. a pair of rearwardiy tending plates arranged. in abuttingrelation to the.

lowerend portions-ofthe side walls.37 and beingfixed thereto by overlappingpatch membersds, see Figure 3;. A plate 48 is mounted upon the members 45 and forms.

a support for a motor 50 which provides power. for effecting rotation of a contact roll 51.

The frontwall 36 of the frame is apertured to receive a spindle housing52 having a radial flange 53 overlying.

the end wall 36:.and being secured thereto as by bolts 54, see Figures 2 and 3. A spindle or shaft 55 is journalled in the housing 53 in suitable antifriction bearings, and the contactroll 51 is'operatively connected to the motor 50 by a coupling 56. A plate-58 isfixedly secured to the outer surface .of each of the-plates .21 at the lower end portion thereof, see-Figures} and 3. 58 of the base structure extend forwardly below the con tactroll-Sl and serve to support a platen 59. The forward portion ofthe platen is engaged by adjusting screws 64 threaded in bosses 65 secured to the inner surface of the side plates '58. These screws 64 serve to level the platen ormove it about the pivot bolts at to bring the platen; in parallelrelation to the axis of the contact roll 51% In the embodiment shown, the platen 59 consists of a platen recess is formed with bosses 6:5 threaded to receive sleeves 67 having hexagonal heads 68. These sleeves ar internally threaded to receiveadjasting screws 69; These rscrews are formed with enlarged head portions 753 mounted inrecessed bosses 71 for-media the ch ck body. The screws are fixedly secured in the bosses by screws 72.- The threads on the sleeves-67 andscrews 69am of portions of the-yoke member to form a marginal surface flush with the plate 82.

The base plate 23' has secured to it a worm gear hour ing $4, Figures 1 and 2, and from which vertically extends a screw threading into a nut 86 mounted in a plate 87 fixedly secured in the bottom of the U-shaped frame member 36; 37. The worm of the reduction gearing mounted in the housing 84 is actuated by a shaft 38 7 extending outwardly through the. iron wall of the cabinet 26 and provided with a hand wheel 89,. With this arrangement the frame, including the contact roll. '51 and the -1T1Q10 S ,fm&.y' be adjusted toward and fromthe p at ns? These side plates The sleeves and screws are locked A bracket is mounted on an elongated plate 91 which is formed with elongated lengthwise extending slots to receive screws 92 which are threaded into the front wall 36 of the frame column and are providedwith jam nuts 93; The plate 91 extends upwardly above the bracket 90 and forms an inner support for a shaft 94. A plate 95 extends upwardly from the front end of the bracket. The shaft 94 is pivotally mounted to the plate 91 on a pin 96. The forward end of the shaft 94 is mounted on a pin positioned in a block 97 which is slidably mounted in the plate 95. The block 97 is adjusted vertically by means of a screw 98 provided at its lower end with a hand wheel 99. This arrangement is to adjust the angularity between the axis of the shaft 94 and the contact roll shaft 55 to effect proper tracking of the abrasive belt 100 which is trained about the contact roll 51, and an idler roll 101journalled on the shaft 92.

The bracket 87 is moved vertically, relative to the frame, by

toggle links

104, 105, joined together at like ends by a pivot pin 106. The upper ends of the links 194 are pivotally connected to a collar 108 also having a sliding connection with a block 109 carried by plate 88. This collar carries an upwardly extending stem 110 extending through the bracket 87, and being provided at its upper end with a nut 111. The stem 110 is encircled by a helical compression spring 112 acting between the collar 108 and the bracket.

The lower ends of the links 105 are pivotally joined to a collar 115 by pin 116. This collar 115 is supported by a stem threaded into a bracket 117 fixedly mounted in the frame. The links 104 are provided with an operating handle 118 which, when moved upwardly from the position shown in Figure 2, breaks the toggle formed by

links

104, 105, effecting downward movement of the collar 108 and the bracket 87. This effects downward movement of the idler roll 101 to permit for the convenient replacement of the abrading belt 100. Downward movement of the handle 11-8 effects straightening of the broken toggle, moving the roll 101 upwardly, and tension is maintained on the belt by spring 112. This tension may be adjusted by manipulation of the stem in the bracket 117.

A bracket 120 is fixedly secured to the side wall of the tank 26 at the right. A plate 121, Figures 8 and 9, is secured to the bracket 120, as by screws 122, and is formed with side members 123 and

cross members

124, 125. A cross member 126 is fixedly mounted on a pair of guide pins 127 slidably mounted in the

cross members

124, 125. The member 126 is urged outwardly by helical compression springs 130 mounted on the pins 127 and acting between the cross member 124 and the movable member 126. The cross member 126 is moved toward the member 124 against the action of the springs by a screw 132 operated by hand wheel 133. A bar 134 is positioned on the cross member 126 and is pivotally secured thereto at one end on a pin 136. This bar extends laterally from the bracket and has a pulley 138 journalled on it. The bar 124 is movable about the pin 136 by an adjustment screw 139.

A bracket 140 is fixedly secured to the opposite side wall of the tank 26 and has journalled in it a shaft 141 carrying another pulley 142. A conveyor belt 143 is trained over the

pulleys

138, 142, with the upper run of the belt passing over the platen 57, or the magnetic chuck 70 carried thereby. The function of the belt 143 is to convey work pieces below the contact roll 51 so that the abrasive belt 100 can act upon the upper surface of the work pieces. The function of the magnetic chuck 70 is to pull work pieces of ferrous material more tightly against the conveyor belt. The conveyor belt 143 is tensioned by springs 130 and is properly tracked by screw 139.

The pulley 142 is rotated by a motor 144 connected to a gear reduction 145 which, in turn, is connected to the shaft 141. The abrasive belt 100 is contained within a casing provided with a door 151, the door being removed in Figure l. The machine is provided with hold down members for securing work pieces, formed of other than ferrous material, to the upper run of the conveyor belt. These hold down members, better illustrated in Figures 6 and 7, consist of a plate 154 secured to the side walls of the casing 150, as by screws 155, see Figure l. The plates 154 are formed with out-turned ears 156 between which a channel member 158 is mounted for pivotal movement on pins 159. A bolt 160 is threaded into the lower end portion of each of the plates 154 and projects outwardly through an aperture in the bottom wall of the channel members 158. A helical compression spring 161 is interposed between the plates 154 and the bottom wall of the members 158 to urge the same outwardly from the plates about the pivot pins 159, this outward movement being limited by nuts 162 and lock nuts 163 threaded on the bolts 160.

Side plates 164 are fixedly secured to the sides of the channel members 158 and extend toward the contact roll 151. A shoe 165 is fixedly secured to the ends of the side plates 164, this shoe extending transversely of the upper run of the conveyor belt and a roller 167 is disposed between the plates 164 and is journalled on a pin 168 carried by the side plates. The arrangement is such that a work piece advancing on the conveyor belt towards the contact roll is engaged by the rollers 167, and up ward movement of the rollers is yieldingly opposed by the springs 161. The shoes 165 are positioned in close proximity to the tagential engagement of the work piece by the belt 98 passing about the contact roll 51. In this manner, thin work pieces of other than ferrous material are maintained in tight engagement with the conveyor belt, and the belt is maintained against the surface of the platen and/ or the magnetic chuck 70.

A switch 170 is mounted upon the wall 36 of the frame structure and has an actuator 171 engaging a cam 172. This cam is mounted on a shaft 173 journalled in the wall 36 and provided at its opposite end with an angle lever 174 positioned to be engaged by the lower edge of the plate 91 when the toggle is broken to effect downward movement of the bracket 90 to permit changing of the abrasive belt 100. The shaft 173 also has afiixed to it a lever 175, and a tension spring 176 is secured at one end to this lever and at its opposite end to a bracket 177 fixed to the Wall 36 of the frame. When the toggle is broken and the plate 91 is moved downwardly, it engages the lever 174 effecting oscillation of the shaft 173 and actuation of the switch 170. The switch 170 is connected to the starter for motor 50 and accordingly, when the toggle is broken to lower the pulley 101 to effect changing of the abrasive belt 100, the motor 50 can not be started.

The machine structure described, while economical to manufacture, provides a rigid arrangement permitting vertical adjustment of the frame toward and from the platen 59. I

What I claim is:

1. An abrading machine comprising a base, a pair of vertically. disposed plates fixedly secured to said base, each of said plates being provided with a vertically extending guideway, a second pair of plates fixedly secured to said base and extending forwardly therefrom, a platen mounted between said forwardly extending plates, a vertically disposed frame member U-shaped in cross section mounted between said guideways, the side walls of said frame being provided with ways having sliding engagement with said guideways, a shaft journalled in the front wall of said frace and extending forwardly over said platen, a contact roll mounted on the forwardly extending portion of said shaft, the lower portion of the side walls of said frame extending rearwardly, a horizontally disposed plate carried by the rearwardly extending por tion of the side walls of said frame, a motor mounted on said plate and being operatively connected to said shaft to effect rotation of said contact roll, a bracket slidably mounted on the front wall of the frame adjacent the upper end thereof for movement toward and from said contact roll, toggle mechanism operable to effect such movement of said bracket, an idler roll journalled on said bracket, and an abrasive belt trained over said rolls.

2. An abrading machine comprising a base, a platen fixedly mounted on said base, a pulley journalled on the base at each side of said platen and a conveyor belt trained over said pulleys with the upper run of the belt extending over said platen, a pair of spaced apart guideways fixedly secured to the base and extending upwardly therefrom, a frame U-shaped in cross section with the side walls thereof extending vertically between said guideways and having ways slidably mounted in said guideways, a shaft journalled in the front wall of said frame and extending forwardly therefrom over said platen, a contact roll mounted on the extending portion of said shaft, a plate fixedly secured to the side walls of said frame, a motor mounted on said plate and being operatively connected to said shaft to effect rotation of said contact roll, a bracket slidably mounted on the front wall of said frame adjacent the upper end thereof, an idler roll journalled on said bracket, toggle mechanism operable to effect vertical movement of said bracket toward and from said contact roll, an abrasive belt trained over said rolls, and power means for operating said conveyor belt for the advancement of work pieces below said contact wheel.

3. An abrading machine comprising a base, a platen carried by said base, a frame extending upwardly from the base, a contact roll journalled in the lower portion of said frame and overhanging said platen, an idler roll journalled in the upper portion of said frame, an abrading belt trained over said rolls, said platen being formed with a recess below said contact roll, a magnetic chuck mounted in said recess, a conveyor belt movable over said platen for the advancement of work pieces beneath said contact roll for engagement by said abrading belt, and means operable to adjust said frame toward and from said platen to accommodate work pieces of varying thicknesses.

4. An abrading machine comprising a base, a platen secured to the base, a frame extending upwardly from the base, a contact roll journalled in the lower portion of said frame and overhanging said platen, an idler roll journalled in the upper portion of said frame, an abrading belt trained over said rolls, said platen being formed with a recess below said contact roll, a magnetic chuck mounted in said recess, means operable to adjust said chuck toward and from said contact roll and to lock said chuck in adjusted position, a conveyor belt movable over said platen for the advancement of work pieces beneath said contact roll for engagement by said abrasive belt, and a motor carried by said frame and operable to effect rotation of said contact roll.

5. An abrading machine comprising a base, a platen fixedly mounted on said base, a vertically disposed frame mounted on the base for movement toward and from the platen, a shaft journalled in the lower portion of said frame, a contact roll mounted on said shaft, said contact roll being disposed above said platen and extending transversely thereof in parallel relation thereto, an idler roll journalled in the upper portion of said frame, an endless abrasive belt trained over said rolls, a pulley journalled on the base at each side of said platen, a conveyor belt trained over said pulleys with the upper run of the belt extending over said platen for the conveyance of work pieces beneath said contact roll, a motor carried by the frame and being operatively connected to said contact roll, and means operable to adjust said frame vertically toward and from said platen.

6. An abrading machine as defined in claim 1 and including a magnetic chuck mounted in said platen below said contact roll.

7. An abrading machine comprising a base, a platen secured to the base, a frame extending upwardly from the base, a contact roll journalled in the lower portionof the frame and being disposed above said platen, an idler roll journalled in the upper portion of the frame, an abrasive belt trained over said rolls, a conveyor belt movable over said platen to advance work pieces past said contact roll, work hold down members mounted on the frame at opposite sides of said contact roll and being operable to yieldingly press work pieces against said conveyor belt.

8. An abrading machine comprising a base, a platen secured to the base, a frame, a contact roll journalled in the frame above said platen, an idler roll journalled in the frame, an abrasive belt trained over said rolls, a conveyor belt movable over said platen to advance work pieces past said contact roll, means operable to adjust said frame toward and from the platen, a support mounted on the frame at opposite sides of said contact roll, a roller journalled in each of said supports, said rollers being disposed for engagement with said conveyor belt in close proximity to said contact roll, and means yieldingly urging said rolls against the surface of said conveyor belt.

9. An abrading machine comprising a base, a platen secured to the base, a frame extending upwardly from the base, a contact roll journalled in the lower portion of the frame and being disposed above said platen, an idler roll journalled in the upper portion of the frame, an abrading belt trained over said rolls, means operable to adjust said frame toward and from said platen, a conveyor belt movable over said platen to adavncc work pieces in engagem'ent with the abrasive belt passing about said contact roll, a work hold down member mounted on the frame at each side of said contact roll, a roller journalled in each of said hold down members, and means yieldingly urging said rollers against the surface of said conveyor belt.

10. An abrading machine comprising a base, a platen secured to said base, a frame extending upwardly from the base, a contact roll journalled in the lower portion of the frame, an idler roll journalled in the upper portion of the frame, and an abrasive belt trained over said rolls, a conveyor belt movable over said platen for advancing work pieces beneath said contact roll, a work hold down mem ber mounted on the frame at each side of said contact roll, said hold down members including a pair of spaced apart side plates, a work engaging shoe secured to said side plates and extending transversely of the conveyor belt, a roller journalled between said side plates in proximity to said shoe, and means yieldingly moving said side plates downwardly to maintain said shoes and rollers in engagement with said conveyor belt.

11. An abrading machine comprising a base, a platen fixedly secured to said base, a frame extending upwardly from the base, a contact roll journalled in the lower portion of said frame, a bracket mounted in the upper portion of said frame for movement toward and from said contact roll, an idler roll journalled on said bracket, an abrasive belt trained over said rolls, a switch mounted on said frame, switch actuating mechanism operable upon movement of said bracket toward said contact roll to actuate said switch, a motor mounted on said frame and being operatively connected to said contact roll to effect rotation thereof, and a control circuit for said motor including said switch, said switch being operable upon actuation to render said motor inoperative.

References Cited in the file of this patent UNITED STATES PATENTS 1,995,382 Fenton Mar. 26, 1935 2,272,273 Parker Feb. 10, 1942 2,612,007 Bell Sept. 30, 1952 FOREIGN PATENTS 664,084 Great Britain Mar. 20, 1950