JP2632915B2 - Dust collector for laser beam machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a dust collecting device of a laser beam machine.

(Prior art) Due to its excellent properties, laser light is widely used for drilling holes in metals such as nonmetals, cemented carbides, and stainless steels, and for cutting various metals and ceramics. In the case of cutting the above metals, for example, a gas cutting method for increasing the processing efficiency by blowing a pressure gas such as oxygen to the irradiated portion of the laser beam to blow the metal in a molten state is often used.

Drilling and cutting in laser processing utilize a material removal function based on melting and evaporation of a workpiece by a laser beam, and involve generation of gas and dust. In a laser beam machine, the gas and dust generally pass through a dust collection pipe that forms an integral air flow passage that is vertically provided below the processing table, and is collected in a dust collection chamber held by a load. After that, it is discharged from the blower to Taiki.

(Problems to be Solved by the Invention) In the above-described dust collecting apparatus of the conventional laser beam machine, spatters generated during processing by a laser beam adhere to the side wall of the dust collecting pipe and gradually grow. ,
Alternatively, dust collection accumulates on the inner wall of the dust collection pipe. For this reason, it has been difficult to remove accumulated spatter and dust because the dust collecting pipe is formed of an integral body.

Therefore, an object of the present invention has been made in view of the above-described problems, and removes dust by dividing a dust collection pipe and opening and closing the dust collection pipe together with operation of a work shooter to improve workability. An object of the present invention is to provide a dust collector for a laser processing machine.

[Structure of the Invention] (Means for Solving the Problems) In view of the conventional problems as described above, the present invention provides a laser processing machine in which a lower end portion is provided below a tiltable work shooter. Providing a dust collecting pipe appropriately connected to the suction device, vertically dividing the dust collecting pipe, providing one of the divided pipes integrally with the work shooter, and linking the other divided pipe with the tilt of the work shooter. Then, it is rotatably supported by the work shooter so as to open and close with respect to the one divided pipe.

(Operation) According to the above-described configuration, the dust collection pipe that opens upward immediately below the processing head of the laser processing machine provided on the tiltable work shooter is vertically divided, and one of the divided pipes is fixed to the work shooter. The other divided pipe is provided rotatably for the work shooter.

When the work shooter is tilted to discharge the work to the outside of the machine by the work shooter when the laser processing is completed, the fixed-side split pipe of the dust collection pipe tilts with the tilt of the work shooter. The other divided pipe is rotatable about the work shooter, and descends substantially vertically by its own weight to separate the dust collection pipe.

This separation operation removes spatter and dust adhering to the inner wall of the dust collection pipe, and even when returning to the original horizontal position of the work shooter, spatter and dust etc. due to the impact that the divided pipes match each other Peel off. Therefore, spatter and dust can be automatically removed during the operation of the machine.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 3 to 6, this drawing conceptually illustrates the overall configuration of the dust collecting device of the laser beam machine, and a work table 3 (partially omitted) of the laser beam machine 1. Is provided with a tiltable work shooter 5.

The work shooter 5 is provided with, for example, a square-shaped dust collecting pipe 9 according to the present invention, which is opened immediately below a processing head 7 (partially omitted) of the laser processing machine 1. It is vertically provided on the lower surface of the processed part base 11.

The lower end of the dust collecting pipe 9 is mounted on the machine base 13 of the laser processing machine 1.
Is inserted densely into an outer frame 15 provided therein, and a scrap fox 17 is provided at a lower portion of the outer frame 15 so as to be freely put in and out. Further, a suction device 23 is provided from the outer frame 15 through a scrap box insertion portion 19 in which a part of the machine base 13 is sealed, and through a suction duct 21 to suck dust and the like generated during processing to the outside of the machine. Exhaust.

The work shooter 5 is provided with a link 29 rotatable around a pin 27 on a bracket 25 erected on the machine base 13, and one end of the link 29 is suspended from the work shooter 5 via the pin 31. It is rotatably connected to the bracket 33. Further, the tip side of the work shooter 5 (FIG. 3, FIG.
A piston rod 39 of a hydraulic cylinder 37 is rotatably engaged with a bracket 35 suspended from the lower surface (left side in the drawing), and the work shooter 5 is tiltable by the operation of the cylinder 37.

With the above configuration, as the operation, the work shooter 5 is held at a position corresponding to the pass line indicated by the line A-A at the limit of ascending of the cylinder 37 by operating the cylinder 37, and the work shooter 5 is searched. The work W is processed.

A predetermined cutting process is performed on the workpiece W, and the cylinder 37 is lowered when the processing is completed.

The work shooter 5 includes a pin 27 serving as a first fulcrum X and a second
The pin 31 and the link 29, which are fulcrums, descend slightly parallel to each other by a small amount, and as the descent proceeds, tilt about the first fulcrum X and stop at the position B shown in FIGS. 3 and 4. Due to this tilt, the workpiece W at the time of machining is discharged out of the machine, and the above operation is performed in reverse to return the work shooter 5 to the original horizontal position, and shift to the next machining step.

Along with the movement of the work shooter 5 described above, the dust collecting pipe 9 provided in the work shooter 5 is vertically divided into two, and the divided pipes 41a and 41b are closely related to each other when the work shooter 5 is in a horizontal position, that is, during processing. The divided pipe 41a is rotatable with respect to the work shooter 5, and the divided pipe 41b is fixed with respect to the work shooter 5.

When the work shooter 5 tilts, guide pins 43 restricting the movement of the divided pipe 41a to the outer frame 15.
Is provided so as to be guided along the division surface of the divided pipe 41a, and the divided pipe 41a is guided by the guide pin 43 so that even at the lower limit of the tilt of the work shooter 5, FIG.
It descends at the position indicated by arrow C in FIG. 4, that is, almost vertically.

On the other hand, since the divided pipe 41b is fixed to the work shooter 5, the movement of the divided pipe 41b moves to the position indicated by the arrow D in FIGS. 3 and 4 at the lower limit of the tilt of the work shooter 5. At that time, the lid 45 which is a part of the outer frame 15 is
With the shaft 49 of the bearing 47 provided on the outer wall of the fifteen as a rotation fulcrum, it is pushed and opened by the tip of the divided pipe 41b. Since the lid 45 is normally biased in the closing direction by the spring 51, the lid 45 returns to the original position when the work shooter 5 returns to the horizontal state. Although the illustration is omitted so that the joint portion becomes dense, it is a matter of course that a seal member or the like is provided.

Reference numeral 53 denotes a free bearing, which serves to smooth the movement of the work W, and a carbon graphite material 55 is laid under the scrap box 17. In the carbon graphite material 55, the laser beam radiated from the processing head 7 may be directly radiated to the bottom of the scrap box 17 in the outer frame 15, but since the carbon graphite material 55 is provided in this portion, the scrap The box 17 serves to prevent damage without being damaged by the laser beam.

The configuration of the dust collection pipe 9 will be described in more detail.

Referring to FIG. 1 and FIG. 2, the dust collection pipe 9 vertically provided on the lower surface of the processing portion pedestal 11 provided on the work shooter 5 (not shown) has a rectangular shape and is vertically divided into two parts.
Of the two divided pipes 41a and 41b, one of the divided pipes 41a is rotatably hung on the lower surface of the processing portion base 11 by, for example, a hinge 57, and the other divided pipe 41b is a bolt 59.
It is fixed to the processing section pedestal 11 by the like. Also, guide pins 43 are brought into contact with the divided surface near the lower end of divided pipe 41a.
Is provided to limit the movement.

With the above configuration, the divided pipes 41a and 41b constituting the dust collecting pipe 9 open and close together with the movement of the work chute 5, so that spatter and dust generated during processing adhere to the inner surface of the pipe. Spatter or dust attached due to the impact of the opening and closing operations of the opening and closing of 41a and 41b can be separated and removed. That is, it is possible to automatically remove the deposits that have adhered to the inside of the dust collecting pipe 9 with the operation of the machine, and it is possible to improve the productivity without requiring any manpower.

In the present embodiment, the dust collecting pipe 9 has a square shape, but it is needless to say that the dust collecting pipe 9 may have a round shape, and the present invention is not limited to the above-described embodiment, and various polarized lights may be used without departing from the gist of the present invention. Of course, it can be added.

[Effects of the Invention] As can be understood from the above description of the embodiments, in short, according to the present invention, the dust collection pipe provided in the work shooter is vertically divided, and one of the divided pipes is fixed to the work shooter. The other divided pipe was provided rotatably on the work shooter. For this reason, the dust collection pipe opens and closes with the movement of the work shooter, so that spatter and dust generated during machining attached to the dust collection pipe can be removed by the shock generated when opening or closing the pipe, and with the operation of the machine. Since the removing operation can be performed automatically, productivity can be improved without requiring any manpower.

[Brief description of the drawings]

1 and 2 are explanatory views showing the structure of a dust collecting pipe according to an embodiment of the present invention. FIG. 1 is a front view, and FIG. It is sectional drawing. FIG. 3 to FIG. 6 are explanatory views conceptually showing the overall configuration of a dust collector of a laser beam machine embodying the present invention.
FIG. 4 is a front view showing a dust collecting device of the laser beam machine, FIG. 4 is an enlarged explanatory view of a main part of FIG. 3, FIG. FIG. 6 is an enlarged sectional view taken along line VI-VI of FIG. 5. 1 Laser processing machine 3 Work table 5 Work shooter 7 Processing head 9 Dust collection pipe 41a, 41b Split pipe 43 Guide pin

Claims (1)

(57) [Claims] 1. A dust collecting pipe (9) having a lower end appropriately connected to a suction device (23) under a work shooter (5) provided to be tiltable on a work table (3) of a laser beam machine. The dust collecting pipe (9) is divided vertically and one divided pipe (41b) is provided integrally with the work shooter (5), and the other divided pipe (41a) is divided into the work shooter (5). Of the one split pipe (41
b) The work shooter (5) so as to open and close with respect to b)
A dust collecting device for a laser beam machine, which is rotatably supported on a laser beam machine.