US2678016A - Stamping machine with sheetfeeding attachment - Google Patents

Description

May 11, 1954 w. A. KARSOE 2,678,016

STAMPING MACHINE WITH SHEET-FEEDING ATTACHMENT Filed Dec. 19, 1949 2 Sheets-Sheet 1 {2:511:33 R I k 1 L x; 5 M1 o 1 s *3 INVENTOR W/LLART A. KARSOE BY 9 ATTORNEYS May 11, 1954 w. A. KARSOE 2,678,016

STAMPING MACHINE WITH SHEET-FEEDING ATTACHMENT Filed Dec. 19, 1949 2 Sheets-Sheet 2 INVENTOR W/ZLART A. KARSOE K /1.4M ATTORNEYS Patented May 11, 1954 UNITED STATES PATENT OFFICE STAMPING MACHINE WITH SHEET- FEEDING ATTACHMENT 1 1 Claim.

This invention relates to a sheet supporting rack for stamping machines.

An object of this invention is to provide a supporting racl; s ructure for sheet metal being fed to a stamping machine which will support the blank. sheet in the plane of the lower die, the rack. structure including an adjustable guide means for the sheet.

Another object of this invention is to provide a rack structure of this lrind which includes means whereby extension members may be added to the structure for supporting wide sheets.

A further object of this invention is to provide a rack structure for stamping machines which can be detachably secured to the machine, and includes an extensible and collapsible buter leg for supporting the outer end of the rack.

With the above and other objects in View, my invention consists in the arrangement, combination and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claim.

In the drawings,

Figure l is a detail side elevation, partly broken away and in section, of a sheet metal supporting rack structure for a die stamping machine, con structed according to an embodiment of this invention,

Figure 2 is a plan view of one of the rack mem bers,

Figure 3 is a sectional view, partly broken away, taken on the line 3-3 of Figure 2,

Figure 4 is a sectional View taken on the line l-- l of Figure 2,

Figure 5 is a fragmentary sectional view taken on the line 5Ei of Figure 2.

Referring to the drawings, the numeral ill designates generally a stamping machine of conventional construction, which is provided with a lower stationary die member ii, and an upper movable die member it. The die member H is carried by a circular plate 13 which is mounted on a bed or supporting plate lil carried by the frame of the machine.

In order to provide a means whereby a sheet of metal may be supported for horizontal movement in the plane of the lower die member H, I have provided a pair of sheet supporting rack members generally designated as i5 and it.

The rack members it and 16 are of like construction and are mounted at diametrically opposed points on the plate l3 and extend from opposite sides of the die member H, with the upper surfaces thereof co-planar with the upper surface of the die member I l. Rack member i5 is (Cl. 1l3113) formed of an inner cast body ll, an outer cast body l8, and an intermediate cast body 59. The bodies 5? and it are fixed together by welding a pair of angle members 2!] to the bodies El and it, and the bodies l8 and it are connected together by means of a pair of outer angle members 23 which are welded to the bodies i8 and id.

The body ll which is the inner body is formed of a top plate 22 having a pair of upwardly opening substantially semi-circular boxes 23 formed at the opposite ends thereof, and the body il includes an inner plate 2d co-planar with the plate 22. The plate 24 is formed at its inner end with a depending flange 25, and a slide block 26 formed with a V-shaped keyway 2'! is secured by fastening means 23 to the lower side of the plate 24 and in abutting relation to the flange 25.

A second block 29 is secured by fastening means (it to the lower side of the plate 26 outwardly from the block 25, and a guide or key member 3! is adapted to engage between the blocks 26 and 29 for locking the inner end of the rack member iii to the stamping machine it. The key member in is adapted to be secured as by fastening means 32 to the plate It, as shown in Figure 5. When the inner end of the rack member E5 is locked to the stamping machine it by engagement of the key or lock 31 in the lreyway ii, the inner end of the rack i5 is held against lateral shifting by means of dowel pins 33 or the like, which are extended through the inner end of the rack member l5 and engage in the plate iii.

A sheet guiding member or finger 3 t is mount ed on a shaft 35 which engages through the block H, and the shaft 35 is formed with polygonal intermediate faces 36, with one of which a set screw 3'! is adapted to engage for holding the shaft 35 against both endwise and rotary movement. Where a relatively large sheet of metal is engaged on the upper side of the rack l5, one of the guide members 8d may be disposed in upwardly extended position, whereas the opposite guide member 3M at the opposite end of the shaft 35 may be disposed oppositely from the guide member 36 and seat within one of the boxes or housings 23, as shown in Figure l, according to the position of the shaft 35 to permit the opposite finger to move to upright position whereby either side of the table may be used as a guide regardless of the width of the shaft.

The intermediate body H3 is constructed similar to the inner body ll, being formed with a pair of outer boxes or housings 38 and a guide supporting shaft 39 engages in the body it and has secured to the opposite ends thereof guides 40 similar to the guides 34 and 34a. Body I9 also includes a bushing 4I within one end of which a bar or tubular supporting member 42 is adapted to be secured by a set screw 43 so that the rack structure may be laterally extended to provide a suitable support for a relatively wide piece of sheet metal.

Body I8 is also constructed similar to body I! and includes a shaft 44 having secured to the opposite ends thereof guides 45, with one of the guides engaging within one of the two housings or boxes 46 formed at the opposite sides of the body I8. The body I8 also includes a pair of end bushings 41 within which lengthwise extending bars or tubes 48 are adapted to be secured for extending the length of the support beyond the end of the rack I5. The body I8 has secured to the outer end thereof a block 49, having a pair of ears 50 between which a connector 5| is rockably mounted. The connector 5| is mounted on a pivot member 52 which extends through the cars 50, and the connector 5| includes a pair of ears 53.

An extensible leg member generally designated as 54 is pivotally secured to the connector 5i and includes an car 55 secured to the upper end of an inner leg member 56. The leg member 55 telescopes into a lower tubular leg member 51 and is fixed in vertically adjusted position by means of a split clamp 53 which is carried by the upper end of the lower leg member 51.

A clamping screw 59 is carried by the clamp 58 and has an elongated handle 60 secured thereto so that the screw or bolt 59 may be conveniently rotated to either a clamping or released position.

The plate 24 at the forward end of the plate 22 has secured to the opposite sides thereof, depending flanges iiI which are adapted to engage at the opposite ends of the key or look 3I to thereby hold the rack member I5 against lateral movement. The dowel pins 33 not only provide a means for holding the inner end of the rack member I5 against lateral movement, but also provide a means whereby the rack member I5 will be disposed in a horizontal plane.

In the use of this rack structure, the key members or looks 3| are secured to the plate or head I3 in parallel relation on opposite sides of the die II. Each rack structure is engaged with the key or lock 3I by placing the slide block 26 inwardly of the key member 3| and in an overlaid position relative thereto. The outer end of the rack I5 is then raised to allow the keyway 21 to align with the key member 3I, and the rack I5 is moved outwardly with the keeper or keyway block 26 sliding onto the key member 3|. The outer end of the rack I5 is gradually lowered as the rack is moved outwardly and downwardly into engagement with the lock or key 3I, and the extensible supporting leg 54 is then adjusted so that the rack structure I5 is in a true horizontal position co-planar with the upper side of the lower die I I.

With a rack structure as hereinbefore described, a firm and relatively solid guiding means is pro vided for the sheet metal which is being passed into the stamping machine, and the guides 34, 40 and 45 are accurately adjustable so that the stamping will take place at the desired point on the sheet metal. Where the metal is relatively wide or long, the laterally extendable extension members 42 may be secured to the rack member I5 or the endwise extending members 48 may be secured to the outer end of the rack member I5. This rack structure provides a means whereby the rack may be removed and subsequently replaced Without changing the original set position.

I do not mean to confine myself to the exact details of construction herein disclosed, but claim all variations falling within the purview of the appended claim.

What I claim is:

A stamping machine having a lower stationary die, a table having a horizontal to portion adjacent and at the same level as the top of the die, a transverse portion forming a channel at a lower level transverse to the direction of the sheet feed to the die, semicircular boxes at each end of said channel open on their outer sides, a shaft member having a polygonal intermediate section rotatably and slidably mounted in said channel, lock means engaging said section for releasably securing said shaft against rotation and transverse movement whereby said shaft may be locked in a selected transverse or rotative position of said shaft, and a single work engaging finger extending radially at each end of said shaft member, the fingers at opposite ends extending in diametrically opposite directions, said fingers being of a length substantially equal to the radius of said boxes, whereby one of said fingers may seat in a box when the other is vertically upright.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 348,462 Hall Aug. 31, 1886 440,969 Smith Nov. 18, 1890 664,148 Herpel Dec. 18, 1900 723,383 Harben Mar. 24, 1903 743,650 Mancha Nov. 10, 1903 751,121 Tidey Feb. 2, 1904 1,029,159 Westerbeck June 11, 1912 1,031,605 Wing July 2, 1912 1,066,528 Randolph July 8, 1913 1,127,975 Elwing Feb. 9, 1915 1,267,379 Cook May 28, 1918 1,460,344 Kager June 26, 1923 1,578,855 Schoendelen Mar. 30, 1926 1,940,581 Carter Dec. 19, 1933 2,156,015 Greiner Apr. 25, 1939 2,495,275 Miller Jan. 24, 1950 2,500,196 Metzner Mar. 14, 1950 2,579,922 Goldsworthy Dec. 25, 1951

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