CA1079183A

CA1079183A - Machine for angularly cutting sheet metal with variable inclination possibilities

Info

Publication number: CA1079183A
Application number: CA279,631A
Authority: CA
Inventors: Domenico Ucci
Original assignee: Individual
Current assignee: Individual
Priority date: 1977-06-01
Filing date: 1977-06-01
Publication date: 1980-06-10

Abstract

ABSTRACT OF THE DISCLOSURE

In this invention a machine for angularly cutting sheet metal has variable inclination possibilities. It is composed of a pair of C-shaped supports, the upper and lower portions being pivotally articulated to the verticle support members. The upper and lower portions house the verticle guides for the support panels of the movable blades, and the stationary counter blades. A system is created for controlling the movable blades as well as a system for regulating the relevant angular position.

Description

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The present invention relates to a machine for angularly cutting sheet metal and similar, on which the inclination of the blades is adjustable.
Whilst it is known that machines currently exist on the market for cutting at an angle, all of these have fixed blades for forming a predetermined invariable angle, generally of 90.
According to the present invention, there is provided a machine for angularly cutting sheet material and includes a pair of C-shaped support members each providing an upper arm and a lower arm, the free ends of the arms of the C-shaped support members being pivotally articulated on a common vertical axis. Means is provided for adjusting the angular relation of the C-shaped support members by pivoting each member about the axis. Each of the pair of C-shaped support members has guide means carried by the upper or lower arm with vertical movable cutting blades being carried in the guide means and a stationary cutting blade being provided in registry with the movable cutting blade on the other of upper and lower arms. Means is provided for movihg the movable cutting blade of both C-shaped support members toward its respective stationary blade.
In a specific embodiment of the invention there is provided a base and a rigid upright member carried on the base and having an upper portion. A horizontal member is secured to and extends from the upper portion and has a free end. A
hydraulic jack is carried by the free end of the horizontal member and is coaxial with the vertical axis, the jack having ff~ a cylinder having opposite end closures forming vertical shafts _ ~.....
coaxial with a downwardly projecting piston rod of the hydraulic -1- ~k`

jack. The shafts support the C-shaped support members for pivoting movement about the vertical axis.
Objects and advantages will emerge from the following description and from the accompanying tables which illustrate, diagrammatically and by way of an example, one form of embodiment for the invention.
With reference to the said tables, Fig. 1 shows the machine in a lateral view, partially in sectional form - Fig.

2 is a plan view thereof, partially in sectional form - and Figs. 3 and 4 are vertical and horizontal sectional views, respectively, in the region of the cutter members.
The base of the machine 1 is fixed to the upright member 2 and the top of this carries the support 3 which projects forwards. To the said support 3 is secured the body 4 of a cylindrical hydraulic jack 5. The cylindrical body 4 is sealed at its upper and lower extremities by the terminations 6 and 7, respectively, screwed to it and these continue externally via the cylindrical extensions 8 and 9, respectively. The lower termination 7 has axially passing through it a hole 10 to allow the shaft 11 actuated by the piston 12 to exit and be guided.
The extensions 8 and 9 of the terminations 6 and 7 are pivotally articulated to the supports 13a and 14a that constitute the upper part of the two vertical C-shaped panels 13 and 14. In particular the said panels, pivotally articulated at the top to the shaft 8 via the bushes 15 and 17, and to the shaft 9 via the bushes 16 and 18, have in their upper part the grooves 25 and 26 (Fig. 2) in which the members 23 and 24 1079~83 slide and to which the movable blades 36 and 38 are fastened through supports 21 and 22 and bolts 27. The lower part of the said panels carries the suppcrts 41 and 42 belonging to the stationary blades 39 and 40. The cutting motion is given to the movable blades 36 and 38 by the rod 11 connected to the supports 21 and 22 by the collars 19 and 20 which are locked by a nut and ring nut. The bottom of the panels 13 and 14 rest with the extensions 13b and 14b, terminating in the two bushes 44 and 45, on a bearing 49 between the shaft 46 and the shaft 47 of a jack 48. This device makes it possible to regulate the travel of the blades 36 and 38 and to discharge on to the base 1, the cutting strain which otherwise would put the structure of the paneis 13 and 14 out of shape. The sheets to be cut rest on the platform 43 which is provided with slots 35 in which two set square type positioning devices of a known type slide.
Furthermore, the machine is provided with a sheet pressing contrivance, as shown in Fig. 3, consisting of the dies 30 seated in the housings 29 machined in the body of the support 22. The said dies are moved by the springs 31 that are interposed between the dies thermselves and the bottom 32 of the housings 29, whilst they are prevented from escaping by the dowels 33 that pass into the slots 34 of the dies 30.
~ o regulate the cutting angle of the blades, the panels 13 and 14 are each connected, through the levers 50 and 51, to the sleeves 52 that run along the guides 53. The said sleeves 52 are operated by the threaded rods 54, on to which they engage in a screw-nut thread mesh, displaced by the handwheels 55 and 56. The angle set between the two blades can be read on the two graduated scales 57 and 58, the former cbr/J~

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of which is integral with the bush 44 and the latter with the bush 45. The sum of the two partial readings a corresponds to the total angle ~ (Fig. 4).
Furthermore, the machine is provided with a com-partment 28 in which the hydraulics are housed and this is anchored to the upright member 2.
- The invention as described and illustrated herein diagrammatically by way of an example, can be taken to also embrace all ancillary variants, which as such, fall within its scope.

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Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. A machine for angularly cutting sheet material comprising:
a pair of C-shaped support members each providing an upper arm and a lower arm, the free ends of the arms of the C-shaped support members being pivotally articulated on a common vertical axis;
means for adjusting the angular relationship of the C-shaped support members by pivoting each member about said axis;
each of the pair of C-shaped support members having guide means carried by the upper or lower arm, a vertical movable cutting blade carried in each guide means;
a stationary cutting blade in registry with said movable cutting blade and carried by the other of the upper and lower arms; and means for moving said movable cutting blade of both C-shaped support members toward its respective stationary blade.

2. A machine as defined in claim l; and further in-cluding a base, a rigid upright member carried on said base and having an upper portion;
a horizontal member secured to and extending from said upper portion and having a free end;
a hydraulic jack carried by said free end of said horizontal member and being coaxial with said vertical axis, said jack having a cylinder including opposite end closures forming vertical shafts coaxial with a downwardly projecting piston rod of said hydraulic jack, said shafts supporting said C-shaped support members for pivoting movement about said vertical axis.

3. A machine as defined in claim 2, wherein said guide means is in the upper arm of each C-shaped support member and provides for vertical movement of the movable blades parallel to said vertical axis, said piston rod being engageable with said movable blades and thereby providing said blade moving means,

4. A machine as defined in claim 3, and further comprising a vertical shaft coaxial with said vertical axis and carried on said base, jack means supporting said vertical shaft through a ball bearing connection, the lower arms of said C-shaped members being supported for articulation on said vertical shaft.

5. A machine as defined in claim 2, 3 or 4 and wherein the means for adjusting the angular relationship of the C-shaped support members includes for each C-shaped support member an elongated guide in said base, a block slidable in said guide and a hand wheel and threaded rod for providing movement of said block and said guide, link means connected between said block and one of the C-shaped support members.

6. A machine as defined in claim 2, 3 or 4 and further including a pair of circular sectors connected one each to each C-shaped member and arranged in superposed fashion on a horizontal plane, reference scales being provided on peripheries of said sectors for indicating angular relation between said C-shaped support members.