US2180078A - Compound abrading and brazing machine - Google Patents

Description

L. A. WILKIE 2.l80,078

v COMPOUND ABRADING AND BRAZING MACHINE Filed May 27, 19 35 Nov. 14, 1939.

s Sheets-Sheet 1 liii/zntom IQ; 2mm. JIM ///W 1 Nov. 14, 1939.- w I 2,180,078

COMPOUND ABRADING AND BRAZING MACHINE Filed May 27, 1935 3 Sheets-Sheet 2 mmmmununum Y AZIIHIIx v I 23 76 1 63 74 6Q 62 77 Nov. 14, 1939. L. A. WILKIE courounn ABRADING AND BRAZING MACHiNE 3 Sheets-Sheet 3 Filed May 27, 1935 MM?? 2/. H

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Patented Nov. 14, 1939 oo roUNn slimmer AND nnszmd Leighton A. Wilkie, Glcncoe, 11]., dssignor to ontinental Machines, Incorpora e Minneapolis. Minn, a corporation of Minnesota The invention relates to cutting and abrading tools of the endless band type. and, means for;'

maintaining the band in operative condition.

One of the objects of'the invention is the provision of new and improved mechanism for abrading which is provided with hovebmeans.

. for maintaining the abrading elements in alignment during their operation.

-Another obiect'of the invention is the provil0 sion of newand improved abrading mechanism ,as an article of manufacture having means mounted on the support for said mechanism forreadily uniting-the band portions in the event of breakage or fracture. 1 16 v A further object of the invention is the pro vision of new and improved mechanism for connecting ends of a broken or severed band together in such manner that the connectedportion will have substantially the same cross sec- 20 tional area as the remaining portion and will be equally as strong. 7

A further object of the invention is the provision of new and improved compound abrading and brazing machines which are simple in con-- 2 struction, easily operated and efiicient. r I Other and furtherobiects and advantages will become-apparent as the disclosure proceeds and the description is read in conjunction with the accompanying drawings, in which- K Fig.1 is'a perspective view of the apparatus; Fig. 2 is a side elevation of a portion. of the hand holding member; v a Fig. 3 is a section on the line 3-3 of Fig. 5;

Fig. 4 is a'section onthe line 4-4 of Fig.1; 7

I Fig. 9 isa section on the line 9-9 of Fig-8;

Fig. 10 is asection on the line. Ill-l0 of Fig. 8; -Fig. 11 is a. perspective view of the guiding Application May 27, 19:5. ScrlalNo. 23,551 1201m (Cl. 211- 8) "ing the work drill a hole in the same, insert the saw and I enlarge the opening; then rout out or further enlarge the opening by filing and finally finishy honing the edges of the openr ing. The pre ent'apparatus has forits princi- 5 opening the ends connected together.

pal object the provision of means whereby all or part of these operations may be mechanically accomplished inexpensively'and expeditiously on operation, since the band must be continuous and of uniform thickness, it becomes necessary to weld or braze the ends tog ether.

Furthermore, in the .use of-band saws,.espe-' cially of the smaller type, it is not uncommon for the band to break and require repairing by 20 welding or brazing. Usually separate welding machines are required for Joining the ends of" the bands and more often than otherwise the band'must be sent elsewhere, or, at least, carried to another part of the plant'to be welded .25

or brazed. In any event, valuable time may be lost andconsiderable unnecessary expense involved in having the .ends of the band connected together.

The present invention seeks to avoid this difo 'ficulty by the provision .of a combined sawing. V abrading and honing-machine and awelding or brazing apparatus. The present device comprises a sawing or abrading apparatus and a repair device so constructed that the 'whole conabrading apparatus which comprises abase 'll,

- manufacture. J

stitutes a unitary device a single article of Referring now to the drawings, the reference character i0 designates a combined sawing and l3 mounted on thebase and a band holding demeansand the abrading mechanism showing' the parts disassembled;

Fig. 121s a perspective view of a 'pair' of the abrasive elements showing the parts detached from their support, but illustratingthem in inte'rlocked position; and" Fig} 13 is a section on the line i3-i3 of Fig. 8. In certain types of work, itis necessary to 'yice ll. The base II is a hollow structure. the

upper surface of which is stepped having an upper horizontal portion l5 on-which is mounted the abrading mechanism I2' and a lower horizontal portion I6 on which the devices i3 and H are mounted.- The operating mechanism for the abrading device is substantially the same as that of a conventional bandsaw and comprises a support l'l in the lower portion of which The bearing 2| for the upper is journaled a lower pulley i8 and in the upper portion of which is :lournaled an upper pulley i9.

pulley i9 is ver- I tically adjustable as at 22, as shown in dotted manner for operating an endless band 23 trained about the pulleys i8 and I9. This band 23 may have one edge serrated for constituting a band saw. 1

The apparatus is provided above the pulley IS with a rest or table 26. for supporting the work, while it is being operated upon, and guiding mechanism 30 for the band above the table, as is usual in such constructions.

Since the details of the structure thus far described may be the conventional band saw construction', it is not thought necessary to further illustrate or describe the same.

When the apparatus is to be used as an abrading or honing device, the band'saw 23 is removed and a flexible steel band 25 (see Figs. 7 to 12), having the abrading elements 26 rigidly attached thereto, is substituted therefor.

The abrading elements may be in the form of flles, hones or the like, depending upon the work to be done, and each is rigidly attached to the band 25 at their intermediate portions, as by means of rivets or the like 21. These rivets are arranged in a plane transversely to the band whereby they will not interfere with the bending of the band, as it passes around the pulleys I8 and I9.

Each ofthe abrading elements 28 has a V-shaped recess 28 in one end and 9. corresponding V-shaped projection 29 on the other, as

clearly shown in Figs. 8, 11 and 12. The abrading elements are so arranged on the band. that the V-shaped projection 29 on one end will engage in the V-shaped recess in the adjacent end of an adjacent element during the straight run of the belt, whereby, during the operation of the device, the abrading elements will be held in alignment parallel with the band.

- By dovetailingthe ends of the abrading elements, these elements will not only be held in alignment, but, the meeting lines or'edges of the joints being arranged at an angle to the direction of travel of the belt, there will be a gradual transition from one element to another as they engage the work during the travel of. the belt. This is considered an important feature of the invention because it not only adds to smoothnessof performance, but lends itself 'to accuracy in the operation'of the device.

In order to facilitate the attachment and removal of the band 25 from the pulleys l8 and ill, the band is split and the ends are provided with a pin and slot connection, as shown in Fig. 11. One end of the band is provided with a headed stud 3| which is rigidly connected to theband and the other is provided with a keyhole slot 32 for engaging the stud.

The two abrading elements on the ends of the band may have their abutting ends provided with a recess 30 for receiving the head iii of the unit. In other words, the recesses provide a clearance for the head 3! of the band during the operation of the device.'

.- tachably connecting the ends together, the band may be readily positioned in a closed. opening for the bearing 2i is ador breaking the band and welding or brazing the ends whenit is desired to rout out or enlarge an opening. The apparatus may be provided with a band saw, a band having filing elements thereon and a band having honing elements thereon whereby all'thre'e operations may be performed successively on the work, if desired, with but little expenditure of time in changing the bands. For instance, the time required for welding and applying the saw band is approximately one to two minutes and the other bands may be changed in about the samtime.

Suitable means are provided for preventing bending of the abrading device while it is passing the restor table 26 when pressure is applied to it during its operation.- In the form of the device selected to illustrate one embodiment of the invention, a backing or guiding device 33 is employed for this purpose.

This device comprises a channel member 34 to which is rigidly connected an upwardly extending arm 35 (see Fig. 7) which is vertically adjustable through a sleeve 35 of the support II. The channel member 34 is arranged inwardly of the band 25 and has its flanges extending outwardly. The flanges are provided with rabbets 38 and 39 which form the ledges 4i and 22 on the inner side of the flanges of the channel, as clearly shown in Figs. 9 and 11 of the drawings.

In order that the abrading elements may engage these ledges without wear on the band, the

band is narrower than the abrading elements.

The band is slightly narrower than the width of the slot at the base of the flanges whereas the abrading elements engage the ledges.

In other words, during the operation of the device, the ledges will constitute backing mem bers for reinforcing the abrading elements 26. The depth of the groove beneath theledges is such as to provide sufficient clearance for the heads of the rivets 21 and for the inner end of the stud 3|.

The channel member 34 extends both above and below the rest or table 24 (see Fig. 8) and the portion of the flanges outwardly of the ledges M and 42 are removed for a short distance above the table or rest'24 to provide access to the abrading elements. The width of the channel member 34 at the point where the outer portions of the flanges are removed is reduced to substantially the width of the abrading members As shown, a U-shaped guide member 46 in is employed for this purpose. The guide member has an extended arm 48 .(see Figs. 9 and 13).

provided with a horizontal slot 49 and said arm is adapted to be adjustably connected to an angle plate 5! rigidly attached to the channel member The plate 5| is provided with a vertical slot 52 through which a clamping bolt 53 extends for adjustably connecting the arm 40 to the plate 5|. By means of the slots, the mem- 7 "2,180,078 ber 46 may be raised or lowered or adjusted .in-

wardly and outwardly to and from the abrading elements 26. The length of the rollers are substantially the same as the width of the channel member ll whereby the abrading elements will be held in the channel at a point justabove where the flanges'are removed, as shown in Fig. 9 of the drawings.

In the operation ol band saws and abrading elements employing flexible steel bands, it is at times desirable'to inserttheband through an opening or sometimes these bands or saws will become broken and it becomes necessary to con- "the brazed portion of the band shall be of substantially the same thickness as the remaining portion of the band-Which, of course, is absolutely necessary in the case of band saws,-and

which is also desirable, but not necessary, in bands used in abrading mechanism-the broken ends of the band are tapered or scarfed so that the ends may be overlapped for brazing the same. Since the bands for the abrading ele-. ments must have constant lengths, due to the vinterfitting or these elements, when one of these bands breaks or is severed, an additional piece or length is necessary. The broken ends are 1 spliced to this additional piece. In tapering the broken end of the hand, one end portion of the band is secured in the band holding device ll. This device comprises a -base or support 54 on the upper portion of which is mounted the iorm member 55 which has the upper surface oi each end beveled or tapered downwardly, as shown at 56 and 51. A clamping member 58' is provided for clamping the end of the band on the form member 55. Then with the aid of a file 59, the upper surface of one end of the bandmay be filed to a proper taper. If the band is a saw the endsare reversed and the opposite endtapered on the opposite side. Aiter' the ends have been tapered, they are brazed in the welding device with brazing material inserted between the overlapping ends.

The brazingor welding apparatus has its two poles GI and 62 extending above the lower plate iii of the base ll 01 the device and is provided with clamping members 63 and 64, respectively, which is adapted toclamp the ends of the band at opposite sides or the lapped portions for holding them in position to be brazed or welded. The

brazing or welding apparatus may be or any suit able construction, that shown comprises the primary winding 65, a laminated core 68 and a U-. shaped conductor 81 which may be considered as constituting the secondary winding. Since the details of the winding and constructionot this portion of the welding device constitutes no part of the invention, further illustration and description are considered; unnecessary.

Suitable means are provided for clampingth overlapped portions of the band during the brazing operation. In the form shown, the clamping member comprises a lever II, pivoted as at 8!, and'provided with a clamping jaw H pivoted to the lever. An adjustable stud I2 is provided for engaging the lower portion of the clamping jaw 1|. The lower portion or this law is provided with a cam surface I3 so" arranged that when the lever it is lowered to bring the contact mem- 15 (see Fig. 4), Preferably a rheostat is connected with the strip to maintain the proper length.

tions of the band, the engagement of the stud with the cam surface will cause the contacting member ll of the Jawll to contact the undersuri'ace or the overlapping members of the band.-

bar I4 into contact'with the overlapping por- After the lever has been lowered for clamping the overlapping ends of the band together, the circuit is closed by the operation of the switch switch 15 so that the desired or required amount .of heat may be applied tor-brazing the over,- lapped ends of the band; It sometimes happens in the brazing operation the band will be slightly enlarged at the lapped portion and it may be necessary to reducefthe thickness of the band at this point. I

The mechanism shown in Fig. 6,is employed in reducing the enlarged portion of the band aft-v er the brazing operation. For the sake or com venience, the terminals Bi and 62 are utilized for this purpose. The terminals are provided with arms I8 and 11, respectively, which extend The table 24 is tiltable in the usual manner whereby the marginal walls of openings may be given the desired bevel. I

If during the operation oi. the sawing or abrading device it becomes necessary or desirable to enlarge an opening having-a continuous marginal wall, the band is severejd, if it is a band saw, the temper oi the severed ends isdrawn by heating the samein the brazing device, and after the ends are scarred they are brazed orwelded together and the enlargement, if any, removed by a file in the band holding device ll. The band is then replaced around the pulleys and the device is ready for the sawing operation. In case the abrading band becomes broken the, same may be mended by brazing both ends to'a connecting In the event it is desired to enlarge the opening by abrading the marginal wall thereof, the band is detached by releasing the button and then inserting the same through the opening in the work, and. then replacing the band. 7

It will thus be seen that the apparatus is a self-contained unitcapable of being changed from sawing to filing or to a honing device, as occasion may require. The apparatus may be considered as being a convertible device inasmuch as it may be readily changed from one typeof operating device to another within a. minimum of time and labor. Furthermore, mounting the brazing mechanism on 'a step lower than that on which the band operating mechanism is mounted places the brazing device in a position where it will not interfere with the operation of the sawing or abrading mechanisms or be interi'ered with by them.

While the disclosure is by way of. example only, it--is understood that various changes may be'made without departing from the spirit and scope of the invention, as defined in the following claims.

gether, and a plurality of abrading elements secured tosaid band, the adjacent ends of said elements on the ends of said band being provided with cooperating slots for affording clearance for the head of said pin during the straight run of filing the interior thereof and for removing the said belt.

2. In a filing machine, the combination of a frame, a plurality of vertically spaced pulleys supported therefrom, a horizontal table supported from said frame and providing a vertical opening, a carrier guided on said pulleys for movement of a portion downwardlyin a straight line a path extended through said opening, and file elements fixed on the front of said carrier to provide a substantially continuous front filing surface in said path and defined between two parallel spaced vertical planes, the longitudinal ends of adjacent file elements being provided with mutually interlocking portions closely laterally fitetd in a manner preventing relative lateral movement therebetween within said straight line path in directions at right angles to said planes.

3. As anarticle of manufacture, a base comprising a lower and an upper platform rigidly connected together, sawing mechanism, including an endless saw band mounted on the upper platform, and welding mechanism mountedon the lower platform for uniting the endsof said band when said band is severed.

4; In an abrading device, a pair of pulleys, a working zone between said pulleys a metallic band trained about said pulleys, means for rotating one of said pulleys, and file elements rigidly connected to said band, the adjacent ends of said file elements. interfitting for preventing relative lateral movement of said ends, said band having a continuous filing surface on its front face as it moves across said working zone, and means on the adjacent ends of said band for detachably connecting the same together whereby.

said bandmay be inserted in closed openings for band and said elements from said openings.

- 5. In 'an "abrading. machine, a pair of pulleys spaced vertically, an endless band trained around said pulleys, a plurality of file members, each of said members having a recess in one end and av corresponding projection on the opposite end for engaging said recess for preventing relative lateral movement of said ends, means for rigidly connecting the medial portions of said members togsaid band, and means for detachably connecting the ends of said band together, said band having a continuous front filing surface.

6. In a convertible band saw and welding device, a hollow base having a stepped upper surface comprising an uppen and a lower step, a convertible band saw and filing device mounted on the upper step, and a'welding device mounted on the lower step of said base for uniting the ,ends of the band saw when the same is severed. 7. In a convertible filing and sawing apparatus, a support, a pair of vertically spaced pulleys mounted on said support and adapted to have i trained about them a thin steel flexiblesaw band band.

ing interengaging ends, mounted on said file band, and a saw band welding device mounted on said support for connecting the en'ds,of said saw band when the same is severed whereby said apparatus is adapted to perform either sawing or filing on internal surfaces.

8. In an abrading device, a thin flexible band,

abrading elements, means for securing an intermediate portion of each element to said band,

the adjacent ends of said elements being provided with interlocking portions for preventing-relative lateral movement of said ends, said interlocking portions including joints extending at an angle to the direction of travel of said band, said elements when in alignment having a continuous filing surface on their front faces.

9. In an abrading device, a? flexible band,

- abrading elements, means for securing. the intermediate portions of said elements to said band, and interlocking connections between the adjacent ends of said elements for preventing relasaid pulleys, and abrading elements mounted on said band, said elements mounted on said band, said elements having interlocking connections between the adjacent ends of adjacent elements for preventing lateral movement of one of said ends relative to the other, the faces of said elements when interlocked constituting a continucus filing surface, and the line formed by the interlocking connection having portions thereof at an acute angle to the center line of the 11. In a device'of the class described, a base. a pair of vertically spaced pulleys mounted on said base, a working zone between said pulleys, a

metallic flexible band trained about said pulleys,

and abrading elements mounted on said band, the ends of said elements lapping past each other,

' the joint between the ends of adjacent elements extending in a non-straight line across said elements, said elements having a continuous filing surface at said working zone.

12. In a metal filing machine, a "file carrier adapted to travel arounda pair of circular pulleys spaced apart in a common plane for movement of a 'portion of said carrier in a straight'line path,v

a plurality of file elements on the outer surface of said carrier to provide substantially a con tinuous filing surface along said straight porrier is in use, the ends of said elements" will he s aced from the carrierwhile passing around the circular pulleys, the adjacent, ends of sald file elements being providedwith mutually interlockingportions closely laterally fitted in a man'- ner for preventing relative. lateral movementbe-v tween said ends within said straight line path Y in a direction at right angles to theplane of said. pulleys, when in use, said carrierbeing split,-

means for detachably'connecting the ends of said carrier together to form an endless member, whereby said carrier and elements may be inserted through a closed opening" for enlarging the same. Y LEIGHTON A. WILKIEI i I CERTIFICATE OF CORRECTION. Pa-tent No. 2,180,078. November 111, 1959.

" LEIGHTON A. W ILKIE.

It is hereby certified that error apoears in the printed specification of the above numbered petentrequiring correction as follows: Page 1;, first column, line 25-21 claim 2, for "fitetd" read fitted same page, second column, line 29, claim 10, strike out the words and come "said. elements mounted on said band,"; and that the a Letters Patent should be read with this correction therein that the the case in the Patent Office. v i 4 v Signed and seaied this 19th day-of December, A. D. 19 9.

same may conform to the record of Henr'y Van Arsdale,

' (Seal) Acting Commissioner of Patents.

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