[0001] The present invention relates to a device for deburring and beveling flat pieces,
such as sheets of whatever thickness, of iron or other materials, which can be either
portable or connected to supporting systems with conveyor belt.
[0002] It is known that beveling with burr removal from the edges is required for flat pieces
whose thickness ia inferior to their other dimensions, obtained through shearing,
blanking and trimming, or other operations like plastic moulding.
[0003] This operation is sometimes carried out in an unsatisfactory and unevenly way, by
means of brushes rotating against the deburring edge, or by means of triangle-shaped
tools scraping on the edge itself.
[0004] The present invention aims at removing the burrs from the edges in a uniform and
regular way, thus obtaining a perfect deburring without any peculiar artifice.
[0005] This and other aims that will be better disclosed later on are all achieved by the
present invention, characterized in that it consists of a pair of rotating abrasive
belts which bevel through contact with their properly rotating surface.
[0006] Each belt is supported by a pair of pulleys (driving and driven one); the belts face
the edges of the piece to be beveled. One or both the rotation axes of the belt pulleys
- the former for the upper edge, the latter for the lower one - are inclined at a
suitable angle to form a "slide" at the leading end, to progressively remove the material,
and to perfectly finish it, as a function of the abrasive belt width.
[0007] The relative motions are the rotation of the belts and the feed in of the piece towards
the device, the two rotating belts between which it is operated being in touch with
its edges. These abrasive belts are mounted in a self-contained mechanic group which
comprises, besides their motorization and guide on rotating pulleys, the other mechanical
elements necessary for the functioning, being the two belts inclined at an opposite
angle.
[0008] The whole group is closed in a carter; a hole for the connection to a dust suction
duct is provided. Other features and advantages will become apparent from the following
description and from the attached drawings which illustrate, diagramatically and by
way of example, an embodiment of the invention. With reference to the said drawings:
- Fig. 1 illustrates a perspective view of the whole group;
- Fig. 2 illustrates a front view;
- Fig. 3 illustrates a lateral view.
[0009] With reference to said drawings, the device can be connected through plate 1 to a
bench for the piece feed in, by means of screws. On the feed in plan, piece 2 is fed
in from left to right passing between the abrasive belts 3 and 4, which are in touch
with its upper and lower edge, respectively.
[0010] Figg. 2 and 3 show both the inclinations the rotating belts can have to carry out
the required operation (in some cases, only one inclination can be given).
[0011] On the driving pulleys, motorizations 6 and 7 are shown, and the pairs of pulleys
9-11 and 10-12 which make it possible the opposite rotation of each belt on the driven
pulley (for instance, pulley 9 rotates clockwise, pulley 10 anticlockwise).
[0012] The displacement required because of the different thickness of the pieces to be
operated is controlled through handwheel 5, by means of its threaded rod, by sliding
saddle 13.
1) DEVICE FOR DEBURRING AND BEVELING FLAT PIECES, WITH VARIABLE BEVELING ANGLE, consisting
of a pair of abrasive belts rotating with opposite motion, characterized in that one
or both of them have opposite inclinations.
2) DEVICE, as claimed in Claim 1, characterized in that two abrasive belts are each
driven by a pair of pulleys (9-11, 10-12) with inclined axes in order to make the
inclination of the plane of one or both belts (3,4) possible with respect to the machining
line of piece (2), whose upper and lower edges are in touch with the belts.
3) DEVICE as claimed in Claim 1, characterized in that a handwheel (5) allows the displacement
of a saddle (13) with a slide for the positioning of the abrasive belts (3, 4) as
a function of the piece (2) thickness.
4) DEVICE as claimed in Claim 1, wherein the pulleys (9-11, 10-12) supporting the abrasive
belts (3, 4) are assembled into a self-contained mechanic group with all the other
necessary accessories.
