WO2005007344A1

WO2005007344A1 - Equipment for treatment of surface through jet of particles

Info

Publication number: WO2005007344A1
Application number: PCT/BR2004/000125
Authority: WO
Inventors: José Jerônimo Marques VIEIRA
Original assignee: Vieira Jose Jeronimo Marques
Priority date: 2003-07-21
Filing date: 2004-07-20
Publication date: 2005-01-27
Also published as: BR0303587A; BR0303587B1

Abstract

This invention refers to the improvement developed in equipment for the treatment of the surface of parts exposed by drumming through a jet of abrasive particles projected centrifugally by a turbine. The jetting equipment comprises a cabinet (1) with an overturning drum (2) counting on a transverse axle (3) with bearings (4) in the side walls (5). The overturning of the drum (2) is stimulated by a drive system preferably of pulleys and leash (6), that receives torque from a moto-reduction set (7). An appropriate electronic system controls the number of spins of the electric engine (7) required for the overturning of the drum (2), from the operation position to the unloading position, interrupting in the loading position. The drum (2) counts on a longitudinal axle (8), responsible for its rotation, on its turn activated by an independent moto-reduction set (9). This moto-reducer (9) is coupled at the bottom of the drum (2), so that it may follow it during the overturning. The drum’s cover (12) is pinned to the sidewalls of the cabinet (5) through arms (13) animated by a pneumatic cylinder (14). The cover (12) is lifted to allow the overturning of the drum (2) to the positions of unloading and loading, then lowered to a new jetting operation. The turbine (15) is activated by an electric engine (16) and a drive system, preferable through pulleys and leash (17).

Description

EQUIPMENT FOR TREATMENT OF SURFACE THROUGH JET OF PARTICLES

This invention refers to an improvement developed in equipment used for treatment of the surface of parts exposed by drumming through a jet of abrasive particles projected centrifugally by a turbine. Conventional abrasive particles jetting machines are classified in three fundamental types, according to the manner in which the particles are projected:

- through suction - the abrasive particles are projected against the part to be treated through suction generated by a Venturi tube;

- through pressure - a pressure vase generates a current of compressed air, projecting the particles against the part in treatment;

- through turbine - a rotor receives the abrasive particles from the center and projects them using centrifugal force through a nozzle located in the frame. Concerning the type of movement performed by the parts, the conventional abrasive particles jetting machines have two basic types:

- static part - requires the manual movement of the part in case of jetting of surfaces other than the surface exposed;

- of conveyance - the parts move over a conveyance belt, allowing the successive jetting of various parts, however with the same limitation of access to all surfaces of the parts. Another problem found in these machines is the limitation to the size of the parts to be treated, presenting low efficiency in parts of reduced dimensions due to the small area of exposition and the difficulty to handle and/or attach them. Therefore, this invention aims an equipment for the treatment of surface of parts through abrasive particles jetting able to resolve the limitations mentioned in the state of the technique. This will be possible through an equipment that protects the abrasive particles through centrifugal force originated by a turbine, where the parts are disposed randomly within the revolving drum. The drum has an inclined rotation axle, which produces the spinning force and makes the parts fall randomly, in a manner in which all the surfaces of the parts are exposed to the jet of the abrasive particles. The drum counts on perforated walls, so that the abrasive particles are collected by gravity and redirected to the system properly. The equipment counts on means for the overturning of the drum, which assumes three positions: operation position, inclined backward, loading position, inclined frontward and unloading position, inclined downward. The cover of the drum is pinned in the structure of the cabinet and activated by a pneumatic cylinder, being lifted in order to allow the overturning of the drum and lowered to the jetting operation. The turbine and its electrical drive engine are assembled on the drum's cover, which also has coupled an exhaustion hose for the volant particles, not released by gravity from the drum's bottom. The bottom of the cabinet counts on a gutter that collects the abrasive particles through gravity, further counting on a worm thread for transport to the means of elevation, to the abrasive supply silo, and to the turbine's rotor. The improvement performed to the equipment for treatment of surface through turbine jetting, object of this invention, has the following benefits in relation to the conventional machines:

- it counts on a system for moving the parts through spinning and turning, which ensures the homogeneous exposition of all parts in all angles; - simultaneous jetting of a number of parts;

- it exempts any type of moving the parts manually;

- it presents high productivity even to parts with reduced dimensions;

- the parts are confined within the drum;

- the cover is pinned to the rear of the cabinet, allowing the overturning of the drum frontward without the cover , which allows full access to the interior of the drum;

- it counts on drum overturning movement, which allows an easy loading and the unloading of the parts through gravity;

- the atmosphere with dust resulting from the jetting is limited to the interior of the drum, being collected through suction by the hose connected to the drum's cover. The improvement developed to equipment for treatment of the surface of parts through jet of abrasive particles, object of this invention, may be best understood through the following detailed description, based on the drawings attached hereto, as listed below:

Figure 1 - front view of the jetting equipment; Figure 2 - left side view of the equipment without the cabinet's wall;

Figure 3 - right side view of the equipment;

Figure 4 - rear view of the equipment;

Figure 5 - upper view of the equipment;

Figure 6 - left side view of the equipment without the cabinet's wall, with the drum closed and in the operation position;

Figure 7 - left side view of the equipment without the cabinet's wall, with the drum in the operation position and the cover lifted;

Figure 8 - left side view of the equipment without the cabinet's wall, with the drum opened and in the unloading position; Figure 9 - left side view of the equipment without the cabinet's wall, with the drum opened and in the loading position. Figure 1 to 5 illustrate, schematically, the turbine jetting equipment that comprises a cabinet (1) with a revolving, overturning drum (2) counting on a transverse axle (3) with bearings (4) in the side walls (5). The overturning of the drum (2) is stimulated by a drive system preferably of pulleys and leash (6), that receives torque from a moto-reduction set (7). An appropriate electronic system controls the number of spins of the electric engine (7) required for the overturning of the drum (2), from the operation position to the unloading position, interrupting in the loading position. The drum (2) counts on a longitudinal axle (8), responsible for its rotation, on its turn activated by an independent moto-reduction set (9).

This moto-reducer (9) is coupled at the bottom of the drum (2), so that it may follow it during the overturning. The drum (2) preferably counts on perforated walls, in a manner that the particles can fall through gravity, being collected by a gutter

(10) at the bottom of the cabinet, provided with a worm thread (11) for the transport to the means of elevation of the abrasive to the supply silo. The drum's cover (12) is pinned to the sidewalls of the cabinet (5) through arms (13) animated by a pneumatic cylinder (14). The cover (12) is lifted in order to allow the overturning of the drum (2) to the positions of unloading and loading, then lowered to a new jetting operation. The turbine (15) is activated by an electric engine (16) and a drive system, preferable through pulleys and leash (17). Also preferably, the engine (16) and the drive system (17) are assembled to the drum's cover (12), following its movement. Still preferably, the drum's cover (12) has coupled a hose (18) of exhaustion of the volant particles within the drum (2), not falling through gravity from its bottom. Figures 6 to 9 demonstrate the two position of the drum's cover (12) and the three positions that the drum (2) assumes. In figure 6 the cover (12) is lowered, maintaining the drum (2) closed, which is inclined backwards and in operation, i.e., in rotation with the turbine (15) and jetting the parts rotating and overturning within the drum. Figure 7 shows the cover (12) lifted by the activation of the pneumatic cylinder (14) that extended the arms (13), releasing the overturning of the drum (2) frontward. Figure 8 shows the cover (12) lifted, while the drum (2), not operating, was inclined frontward and downwards, by the moto-reducing set (7), in order to allow the unloading of the parts already treated through gravity. Figure 9 shows the cover (12) lifted, while the drum (2), not operating, returned to an intermediate position, inclined frontward and upwards, allowing the loading of a new set of parts to be treated. Evidently, this invention shall consider alterations to shape, dimensions, materials and disposals of components, provided that for the same effect, substantially equal and with the same elements or with equivalent elements. For instance, the form of transmission of the rotation and the overturning of the drum may be substituted by a chain or similar drive systems. The alteration to the shape of the cabinet shall be considered within the scope of this invention. The pneumatic cylinder may be any type of linear actuator, such as any hydraulic cylinder.

Claims

CLAIMS 1 - "IMPROVEMENT IN EQUIPMENT FOR TREATMENT OF SURFACE THROUGH JET OF PARTICLES", which comprises a cabinet (1), characterized bv the fact of having a revolving, overturning drum (2) counting on a transverse axle (3) with bearings (4) in the side walls (5), the overturning of which is stimulated by a drive system (6), that receives torque from a moto-reduction set (7); said drum (2) also counting on a rotation longitudinal axle (8) activated by an independent moto-reduction set (9), attached to the bottom of the drum (2); the cover of the drum (12) is pinned to the side walls of the cabinet (1) through arms (13) animated by a linear actuator (14), releasing the overturning of the drum (2) to the positions of unloading and loading; the turbine (15) is activated by an electric engine (16) and a drive system (17). 2 - "IMPROVEMENT IN EQUIPMENT FOR TREATMENT OF SURFACE THROUGH JET OF PARTICLES", according to claim 1, characterized bv the fact that the drum (2) has perforated walls for the fall of the abrasive particles collected by a gutter (10) at the bottom of the cabinet, which counts on a worm thread (11) for the transport to the means of elevation to the abrasive supply silo. 3 - "IMPROVEMENT IN EQUIPMENT FOR TREATMENT

OF SURFACE THROUGH JET OF PARTICLES", according to claim 1, characterized bv the fact that the turbine (15), the electric engine (16) and the drive system (17) are assembled to the cover of the drum (12) in order to follow its movement. 4 - "IMPROVEMENT IN EQUIPMENT FOR TREATMENT

OF SURFACE THROUGH JET OF PARTICLES", according to claim 1, characterized bv the fact that the cover of the drum (12) counts on a hose (18) of exhaustion of volant particles not falling through gravity at the bottom of the drum (2).