US2165614A - Workpiece vise for cutting devices - Google Patents

Description

July 11, 1939. H. D. cook ETAL A WORKPIEGE VISE FOR CUTTING DEVICES Filed Jan. 25, 1937 4 Sheets-Sheet 1 F IE1.

Inventors: HOW/4E0 0. COOK ana Fen-z f7. 5CHflEFF'.

lie/i mbrasys.

July 11, 1939. H. D. COOK ET AL 2,165,614

WORKPIECB VISE FOR CUTTING DEVICES Filed Jan 25, 1957 4 Shets-Sheet 2 hweizlom HOWflED D. COOK and FE/Tz M. 5CHQEFF.

H. D. cooK ET AL YORKPIECE VISE FOR CUTTING DEVICES July 11, 1939.

4 Sheets-Sheet 3 Filed Jan. 25, 1915'?v FIGA.

4 5. 7 M m m 3 1 m c #m D5 1 in u July 1939- H) D. COOKET AL 2,155,514

WORKPIECE VISE FOR CUTTING DEVICES Filed Jan. 25, 1937 4 Sheets-Sheet 4 hwe'ntora' Hon 4 0 0. (00K arid FE/TZ M. @C/MEFF.

Patented July 11, 1939 WORKPIECE VISE FOR CUTTING DEVICES Howard D. Cook, Elyria, and Fritz M. Scharfl,

Lorain, Ohio, assignors to National Tube Company, a corporation of New Jersey Application January 25, 1937, Serial No. 122,266

2 Claims.

This-invention relates to a work-piece vise for cutting devices, and more particularly to a vise for holding plates, bars or other articles while being sheared or sawed.

. It is an object of the present invention to pro- 1 in section, of the apparatus of the invention.

Figure 2 is a fragmentary end elevation of the apparatus of Figure 1.

Figure 3 is a view on the. line III-III of Figure 1.

Figure 4 is a view similar to Figure 1 but disclosing the elements of the apparatus in another operative position.

Figure 5 is a view on the line V-V of Figure 1.

Figure 6 is an electrical diagram illustrating 2 the manner in which the elements of the apparatus are operated.

A preferred embodiment of our invention is shown in the drawings as applied to a conventional shearing mechanism 2 comprising a base 3, housing 4, upper reciprocating shear-blade .and lower stationary shear-blade 6, the latter being secured to a bed-plate 1. The upper shearblade 5 is operated by a suitable source of power (not shown) acting through a crankshaft 8 and connecting-rod 8. A cam in .is carried by the outer end of the crankshaft 8, for a purpose to be later described.

A slide-bar I5 is reciprocably mounted on the bed-plate 1 adjacent the lower shear-blade 8 in brackets l6 and 11 which have slideways l8 and 19 therein. The slide-bar i5 reciprocates transversely of the line of feed of the material to be cut, which in the drawings is shown as comprising a stack of plates 28. The slide-bar 15 carries jaws 2i and 22, between which the plates 28 are held in alignment. The jaw 21 is fixedly secured to the slide-bar 15 at its inner end, while the jaw 22 is siidably mounted on the mid-pop tion thereof by a bolt 23 which extends through a slot 24. The slide-bar i5 is recessed on its under side, as at 25, to provide a slideway for the head of the-boit 23. A pair of lugs 26 are fixedly attached to the bar 15 adjacent its outer end.

The jaw 22 carries a pair of parallel, outward- 1y extending arms 21 having suitably spaced transverse slots 21 on the upper surfaces thereof. A clevis 28 having a transverserecess 28 is disposed between the arms 21 on the jaw 22. Aclamp-bar 29 is disposed in the transverse recess 28 in the clevis 28, and carries a lug 29 on either side thereof for disposal in one of the adjacent slots 21 in the arms 21 on the jaw 22. The clevis 28 and clamp-bar 29 are secured to the slide-bar 15 by means of abolt 38 which extends'through the slot 24, and to the jaw 22 by the engagement of the lugs 29 on the clampbar 29 with the slots 21 in the arms 21.

The housing 4 of the shearing mechanism carries a cylinder 31 having the usual piston 32, which may be operated either by compressed air or any compressed fluid. The piston-rod 32 'of the piston 32 carries a pair of pivoted links 33, one of which is pivotally connected to the lugs 26"on the outer end of the slide-bar 15 while the other is pivotally connected to the clevis 28.

According to the foregoing construction, it will be seen that the opening between the jaws 2| and 22 may be regulated by the adjustment of the clevis 28 and clamp bar 28 with respect to the arms 21 which are carried by the jaw 22. In the operation of the device, both jaws close in on the work-piece with the down-stroke of the blade 5 and recede from the work-piece withthe up-stroke thereof, permitting the free entry and delivery of the work-piece before and after cutting.

The cylinder 3| is connected to a suitable source of fluid under pressure by pipes 48 and 41, T- couplings 42 and 43, valves 44 and 45, pipes 46, 41 and 48. Exhaust valves 58 and 5| are connected to the T- couplings 42 and 43, respectively. The valves 44, 45, 58 and 5| are normally closed and are opened by solenoids 44 45 50 and 51, respectively, which are connected to a circuit breaker 55, operated by a circuit A. This circuit A is closed by a switch 56 which is opened and closed by an arm 51 having a roller 58 in contact with the cam 18 on the crankshaft 8. It will be seen that the solenoids 45 'and 50 are connected by a circuit B which is closed by the lower contact 80 of the circuit breaker 55, while the solenoids and 5| are connected bya circuit C which is closed by the upper contact 6| of the circuit breaker 55.

In operation: At the beginning of the down stroke of the upper reciprocating shear-blade 5 by the rotation of the crank-shaft 8, the cam 18 is rotated and the roller 58 dropped to its lower position, thus closing the switch 56. The circuit A being closed, the circuit breaker 55 is energized, closing the circuit C through the contact 6i while the contact 60 is opened; thus breaking the circuit B. Accordingly. the solenoids 44 and 5| are energized and open the valves 44 and 5| while the valves 45 and are permitted to close. Fluid under pressure is thus admitted to the top of the cylinder 3i and allowed to exhaust from the bottom thereof, whereupon the jaw 22 is moved toward the jaw 2|. This aligns the plates 20 and holds them in alignment until the upper reciprocating shear-blade 5 has completed its down stroke.

As soon as the cutting stroke is completed and the upper reciprocating shear-blade 5 starts its return stroke, the cam in forces the roller 58 and arm 51 to their upper positions. This opens the switch 56, breaks the circuit A, and causes the circuit breaker 55 to return to the originalposition shown with its upper contact 6| open and its lower contact closed, thus closing the circuit B. The solenoids 44 and 5P will be energized to open the valves 44 and 5|, while the breaking of the circuit C permits the valves 45 and 50 to close. Fluid under pressure is thus admitted to the bottom of the cylinder 3| and permitted to exhaust from the top thereof, which causes the jaw 22 to be retracted. The plates or other articles which have been out are then released.

A switch is provided in the circuit A so that it can be kept open in case it is desired not to have the jaw 22 operated, such as, for example, when cutting samples, crop, or mill cobbles. In place of electrically operated valves, a pilot-valve using the compressed fluid which operates the cylinder 3| may be employed. This pilot-valve may also be actuated by the cam Ill over asuitable lever system.

While we have shown and described a specific embodiment of our invention, it will be understood that we do not wish to be limited exactly thereto, since various modifications may be made without departing from the scope of our invention, as defined by the following claims.

We claim:

1. The combination with a cutting device of a work-piece aligning and holding device, said work-piece aligning and holding device comprising a reciprocable bar, a jaw member fixedly mounted on said bar, an oppositely disposed jaw member mounted on said bar for longitudinal reciprocation with respect to the latter, a movable element, said movable element being disposed adjacent said second-named jaw member but remote from said first-named jaw member, a pair of oppositely extending links pivotally connected to said movable element, one of said links being pivotally connected to said second-named jaw member, the other of said links being pivotally connected to said bar, and means for moving a pair of oppositely extending links pivotally con-- nected to said movable element, one of said links being pivotally connected to said second-named jaw member, the other of said links being pivotally connected to said bar, said element being disposed for movement in a plane which is intermediate said second-named jaw member and the pivotal connection of said second-named link with said bar, and means for moving said element to move said bar and said second-named jaw member in opposite directions, said means being,

operated by the movement of said cutting device.

HOWARD D. COOK. FRITZ M. SCHARFF.

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