US2508534A - Material working machine - Google Patents

Description

May 23, 1950 H. D. PAXSON 2,508,534

MATERIAL WORKING MACHINE Filed Nov. 2, 1946 3 Sheets-Sheet 1 FIG. I.

Y HOMER D. PAXSQN INVENTOR ATTORNEY May 23, 1950 PAXSON 2,508,534

MATERIAL WORKING MACHINE Filed Nov. 2, 1946 3 Sheets-Sheet 2 g .97 W Fur-5.3.

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. INVENTOE. HZ/W ATTORNEY Patented May 23, 1950 UNITED STATES PATENT OFFICE MATERIAL WORKING MAI'JI IIN E Claims.

My invention relates to material workingmachines, more particularly to a machine for forming the edge or 'edgesof a strip, and the principal object of my invention is to provide new and improved machines of this character.

The invention provides a machine which is ideally suited to trim or form edges of sheet'metal to any desired size or cross-sectional contour. Further, the machine provided by my invention is less costly to manufacture, is adjustable and changeable to provide for variance in the formation'of the sheet edge, and is composed'of mechanism that is readily accessible for maintenance, testing, or inspection work. V

In the drawings accompanying this application, and forming a part of this specification, there is shown, for purposes of illustration, an embodiment which the invention may assume, and in these drawings:

Figure l is a plan'view of a machine disclosing an embodiment of the invention,

Figure 2 is a fragmentary side elevational view of the machine shown in Figure 1,

Figure 3 is an enlarged fragmentary vertical sectional view corresponding generally to the line 3--3 of Figure 1,

Figure 4 is a fragmentary vertical sectional view corresponding generally to the line 4-4 of Figure '1,

Figure 5 is an enlarged fragmentary side elevational view of the machine, showing certain parts in an-open position, 7

Figure 6 is a generally schematic perspective view illustrating arrangement of the forming mechanism, and

Figure '7 is an enlarged fragmentary view of a sheet, showing one type of edge which may be formed. 7

The machine herein "shown to disclose the inventioncomprises a base iohaving a top supporting surface ll. Carried by the top surface II is a pair of tool supports 12 and l 3. The tool-support I2 is securely fixed to the top surface, in ny suitable manner, as for instance by bolts. The tool support 13 is slidable along the top surface, in a direction toward and away from the tool support 12. Preferably, a key I4 (see Figure 3), held in a way it formed in the top surface H, is slidably received in a keyway IT formed in the tool support I3, to hold the tool support to predetermined movement. The key is preferably held to position in the way I5, by means :of bolts IT.

The tool support I 3 is formed with a transverse aperture l8, threaded as at 19, to receive the screw-threaded shahkZ-i oia hand wheel 2 l. The hand wheel construction includes a reduced diameter portion 22 jourhailed-in a bracket 23 rigidly carried by the top surface it. The reduced portion forms shoulders engageabl'e with the side surfaces of the bracket 23, so that the wheel construction is held longitudinally stationary and rotation of the hand wheel causes the shank 20 to thread in the aperture 1 9 and move the tool support [3 toward or away from the support 12, depending upon the direction of rotation of the hand wheel. 2i.

The tool support i2 is provided in its upper surface with a series of grooves 25, each forrec'eiv'ing either a cutter 2%: or a gauge block 25. In the present case, it is preferred to start with a gauge block "26 (see Figure *6) and then alternate cutters 25 with gauge blocks 26, and'ending with a gauge block '25, this progression being along the line of movement of the sheet 5.

As best seen in Figure 3, the grooves 24 are of a height slightly greater than the depth of the cutters Z5 (and of the gauge blocks 26) and a plate 21, spanning all grooves M, is bolted to the top surface of the tool support 12. In effect, this construction prov-ides individual openings through which a respective cutter or'gauge block may slide. in line with each groovefz't, the plate 2? is provided with a screw-'threaded-aperture 28 for receiving a set screw 29. The set screws 29 hold respective cutters or gauge blocks in tight engagement with the bottom of the respective grooves 23, and thus holdthe cutters and gauge blocks in horizontal alignment.

The tool support 12 is formed withan elongated groove 30 extending transversely'with respect to the grooves 25, for the "pur ose of receiving a backup block 31. "The block '51 is provided with screw-threaded apertures -32 generally in axial alignment with the grooves 2%, each aperture receiving a back-up screw 33 having one end adapted to back up .a cutter or gauge block.

The tool support 13 is likewise provided with means for supporting cutters and gauge blocks, parts similar to those previously described being given similar numbers but supplemented with the suiiix a. y

In the particular embodiment hereind-isclosed, it was required to form a side edge of the sheets with an angular formation, as indicated in Figure 7. Accordingly, thecutters 25 are arranged along the line of travel of the sheet so as to successively make progressively inwardly extending cuts along the edges of the (sheets, as indicated by the line's I), c, d, e and f, in 'the case where five cutters are used.

The progressive cutting action may be provided for by either having progressively greater cutting angle on the cutter faces, or by having the cutting angle on all faces alike, and progressively extending the cutters toward the sheet edge, as herein shown. 'In either event, the gauge blocks, at the entrance and exit for the sheet and between adjoining cutters, provide a constant guide for the sheet, so as to prevent the sheet from crowding the cutters along one edge and receding from the cutters along the opposite edge.

It will be appreciated that, if desired, only one edge of the sheet may be formed, in which case the cutters along the opposite edge are omitted, the gauge blocks guiding such opposite edge during movement of the sheet. Regardless of whether one or both edges of the sheet are formed, it will be clear that my invention provides means whereby the sheet may be rapidly fed through the machine, and the edge or edges quickly and easily formed. Further, edges of various widths of sheets may be formed to the same edge contour, without changing position of the cutters in their individual holders, simply by proper adjustmentof the hand wheel 2|.

To insure that the edge or edges of the sheet are properly formed, means are provided to prevent buckling of the sheet S as it passes through the series of cutters. The means herein shown comprise rollers engaging the sheet on opposite flat surfaces.

Referring particularly to Figures 1 and 3, the plate 21a is formed with an upstanding leg 35 provided with apertures 36 (three in this case) each aperture having a'conical portion, as best seen in Figure 3. Each aperture is adapted to receive a collet 31 having a split, conical head and a threaded shank, the conical head fitting within the conical portion of the recess. Each collet receives a stub shaft 38 which provides support for a bearing 39 carrying a roller 40. A split washer 4| forms an abutment between which and a shoulder 42 formed on the shaft 38, is held the bearing 39. After the shaft 38 and its roller have been moved to desired adjusted position, a nut 43, threaded on the shank of the collet, pulls the head of the collet into the conical portion of the aperture 36, to clamp the shaft 38 in position. The shaft 38 is preferably formed with an eccentric portion, as best seen in Figure 3, so that the distance between the upper and lower rolls may be adjusted merely by loosening the nut 43, rotating the shaft 38 within the collet 31, and again tightening the nut 43. a

A lower roller 44 is also held by a collet construction similar to that already described, the collet 45 in this case fitting in an elongated aperture 41 formed in the tool holder l3.

Feed rolls for the sheet S are provided both at the entrance and exit of the machine, so that in starting a sheet, the sheet will be positively fed through the rollers, and in finishing a run, the end of the sheet will be positively pulled through the rollers.

The entrance feed rolls 50, I, and the exit feed rolls 52, 53 are of similar construction, and only the entrance feed rolls 50, 5| will therefore be described in detail.

Referring particularly to Figure 4, the roll 5| is journalled in a bearing carried by a housing 54 which is securely fixed to the top supporting surface I! of the base ID, as by means of bolts, The housing 54 carries a pivot shaft 55 on which is carried a housing 56 which carries a bearing for the roll 50. Thus, the housing 56 carrying the roll 50 may be swung about the shaft 55 to move the roll 50 away from the roll 5|.

The housing 56 is formed with an aperture 66, through which passes the shank 6| of a screw stud which is formed with a shoulder-forming head 62. The housing 54 is provided with a screwthreaded recess 63 for receiving the shank 6|, so that the housing 56 may be held against movement away from the housing 54, and adjustment of the distance between the feed rolls 56, 5| is readily effected.

The shaft 64 carrying the roll 50 has a spur gear 65 fixed thereto, and the shaft 66 carrying the roll 5| has a spur gear 61 fixed thereto, the

gears 65 and 61 being in meshing relationship.

The housing 54 has bearings for a shaft 66 which carries a spur gear 69 meshing with the gear 61, and the extremity of the shaft 68 carries a sprocket wheel 10. a

The feed rolls 52 and 53 are supported and rotated by construction similar to that provided for the rolls 50, 5|, and similar parts bear the same reference numeral supplemented by the suflix a. A sprocket chain H connects the sprocket wheels 10, 10a, so that the pairs of feed rolls 56, 5| and 52 53 are positively driven at the same speed. As best seen in Figure 2, the chain H receives power from a sprocket attached to a motor M.

In view of the foregoing, it will be appreciated that, within limitations, sheets of various widths may be easily accommodated by the machine, merely by proper adjustment of the handwheel 2|, Also, sheets of various thicknesses may be accommodated, merely by proper adjustment of the heads 62, 62d. For hand feeding, such as during set-up time, or for checking or inspection purposes, the heads 62, 62a may be rotated to remove the screw-shanks 6|, 6m from respective recesses 63, 63a, so that the housing 56, 560, may be swung about their pivots to separate the feed rolls, as seen in Figure 6.

From the foregoing, it will be appreciated by those skilled in the art that I have accomplished at least the principal object of my invention, and it also will be apparent to those skilled in the art that the embodiment herein disclosed may be variously changed and modified, without departing from the spirit, of the invention, and that the invention is capable of uses and has advantages not herein specifically described; hence it will be appreciated that the herein disclosed embodiment is illustrative only, and that my inventionis not limited thereto.

I claim:

1. In a machine for forming an edge portion of a strip of material, cutter head meansin relatively movable relation with said strip and com-- prising aplurality of cutters having cutting-faces extending along the line of relative movement and extending progressively inward of said edgeportion so as to make successive cuts along said edge portion, and means disposed between at least certain adjoining cutters, said means being engageable with out parts of said edge portion for maintaining said strip in predetermined relation with respect to said cutters.

2. In a machine for forming an edge portion of a strip of material movingtherethrough, cutter head means comprising a plurality of cutters held stationary with respect to said strip during cutting action, said cutters having cutting faces arranged along the line of travel of said strip and extending progressively inward of said edge portion so as to make successive cuts along said edge portion, and gauge means disposed between adjoining cutters and adapted to progressively ex tend inward into slidable engagement with adjoining out parts of said edge portion for maintaining said strip in predetermined relation with respect to said cutters.

3. In a machine for forming an edge portion of a strip of material moving therethrough, cutter head means comprising a plurality of cutters held stationary with respect to said strip during cutting action, said cutters having cutting faces arranged along the line of travel of said strip and extending progressively inward of said edge portion so as to make successive cuts along said edge portion, gauge means disposed between adjoining cutters and adapted to progressively extend inward into slidable engagement with adjoining cut parts of said edge portion for maintaining said strip in predetermined relation with respect to said cutters, and means providing for adjustment of said cutters and said gauge means in a direction toward and away from said edge portion.

4. In a, machine for forming opposite edges of a strip of material passing therethrough, cutter head means comprising spaced opposed sets of gauge blocks and spaced opposed sets of cutters, each set being held stationary with respect to said strip during cutting action, said gauge blocks in each set being disposed between adjoining cutters of each set, and said cutters of each set having cutting faces arranged along the line of travel of said strip and extending progressively inwardly of respective edge of said strip so as to make successive cuts along said respective edges, and said gauge blocks of each set extending progressively inward into sliding engagei'nnt with adjoining out parts of said amid-- site edges so as to maintain said strip in predetermined gauged relation with said sets of cutters.

5. In a machine for forming opposite edges of a strip of material passing therethrough, cutter head means comprising spaced opposed sets of gauge blocks and spaced opposed sets of cutters, each set being held stationary with respect to said strip during cutting action, s'aid gauge blocks in each set being disposed between adjoining cutters of each set, and said cutters of each set having cutting faces arrangedf along the line of travel of said strip and extending progressively inwardly of respective edge of said strip so as to make successive cuts along said respective edges, and said gauge blocks of each set extending progressively inward into sliding engagement with adjoining out parts of said opposite edges so as to maintain said strip in predetermined gauged relation with said sets of cutters, and means engageable with opp site flat surfaces of said strip as it passes relatively to said cutter head means to restrain said strip against buckling.

HOMER D. PAXSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS- Number Name Date 1,107,625 Martin Aug. 18, 1914 2,242,815 Darner May 20, 1941 2,318,732 Yoder May 11, 1943 FOREIGN PATENTS Number Country Date 13,704 Great Britain June 11, 1909

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