JPS60152389A - Smoke collector in laser working machine - Google Patents

Abstract

PURPOSE:To provide a titled smoke collector which can suck and capture concentrically dust-ladeu gases by connecting and installing respectively freely openably and closably smoke collecting ports provided in the respective block chambers in parallel with the moving direction of a moving table consisting of the plural block chambers to carry works and smoke connecting hoods. CONSTITUTION:A material to be worked P is placed and set on a moving table 5 and while the table 5 is moved in this state in a direction (x) and a beam nozzle 6 in a direction (y), respectively, a laser beam is oscillated from the nozzle 6 to cut the work p to a prescribed shape. A dust collecting hood 12 is positioned always in the laser working part, i.e., in just front of the nozzle 6 irrespectively of the movement of the table 5. For example, only the chamber C and the smoke connecting port 9c on the side wall and the smoke suction port 16 of a hood are communicated in order to communicate the block chamber right under the nozzle 6 under laser workin out of the block chambe A-E of the table 5. The dust-laden gases such as fumes, etc. generated by laser working are focibly sucked into the chamber C right under the working part and are collected to the dust collector from the chamber C through a hood 12 and ducts 25, 26, by which the dust collection is accomplished.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a laser processing machine that collects dust-containing gas such as heat generated when cutting workpieces such as steel plates and acrylic plates. The present invention relates to a smoke device, and more particularly to a smoke collecting device in a laser processing machine in which a workpiece is placed on a moving table called a work table that reciprocates in a fixed direction for laser processing.

Generally, when cutting steel plates, acrylic plates, etc. using this type of l/- machine, a large amount of fume and other dust-containing gases are generated, which may degrade the working environment on the movable table: +77,'-
There is a problem that the table or peripheral equipment may be contaminated. Therefore, a smoke collection device will be installed as a preventive measure.

A conventional smoke collection device has a smoke collection port that extends continuously along the entire length of the side wall of a movable table that is shaped like a flat box with an open top surface on which the workpiece is placed, and a smoke collection port that extends from the upper and lower edges of the smoke collection port A smoke collection hood that is provided with a pair of upper and lower rubber seals that protrude outward and normally close the smoke collection port, and the tip of the upper and lower comb seals is inserted so as to push open a part of the space between the two to communicate with the smoke collection port. is fixed to a table stand, etc., and its smoke collection hood is connected to a dust collector via a duct.The dust-containing gas generated during laser processing is transported from inside the table through the smoke collection port on one side of the table. The smoke is collected by the smoke collection hood and then passed through the duct to the dust collector for dust collection.

However, in the conventional smoke collection device having the above configuration, firstly, the seal at the connection part between the smoke collection port on one side wall of the reciprocating movable table and the fixed smoke collection tool V is incomplete, and there are many gaps that prevent outside air from flowing in. Dust gas leaks. In addition, the smoke collection hood always communicates with the entire area inside the movable table through the smoke collection port, and sucks smoke from a wide area far away from the laser processing area, so there is a large amount of outside air flowing in from above the movable table. On the other hand, dust-containing gases will diffuse and concentrated smoke collection will not be possible. For this reason, it was not possible to obtain an efficient smoke collection effect, and solutions such as improving the work environment on the table were insufficient (C), and a large-capacity dust collector was required, which was uneconomical in terms of equipment costs and expenses. .

This invention was made in view of the above circumstances, and its purpose is to securely connect the smoke collection port on the side wall of the movable table to the smoke collection hood, to prevent outside air from leaking in, and to reduce the The dust-containing gas generated during processing can be collected centrally from within a small area without being diffused over a wide area, making it possible to improve the work environment very efficiently and reliably, and it is also highly economical. Our goal is to provide smoke equipment.

The smoke collecting device in the laser processing machine of this invention is
A partition wall is provided in the movable table to divide the inside of the table into a plurality of compartments in the direction of movement of the table, and smoke collection is provided at a location corresponding to each of the compartments on a side wall parallel to the direction of movement of the movable table. The outer surface of the side wall of the movable table has an opening and the smoke collection port is in sliding contact (a smoke collection hood disposed on the X device and communicating with at least one smoke collection port, and both sides of the smoke collection hood) A closing cover is provided to close the smoke collection port located next to the smoke collection port that extends over the smoke collection port and communicates with the smoke collection hood, and the smoke collection hood is further connected to the dust collector via a duct. It is something.

Embodiments of the present invention will be described below with reference to the drawings. 1 in the diagram
is a left and right horizontally elongated table pedestal, and has a pair of guide rails 3 (rear guide rails) arranged horizontally long in the left and right direction with parallel intervals in the front and back on a plurality of [ ]-shaped legs 2. (not shown) is provided. By slidingly fitting a plurality of dovetail members 4 onto the guide rails 3 of the table pedestal 1 after it is installed, the movable table 5 is mounted horizontally so as to be movable back and forth in the left-right direction, that is, in the direction of the arrow X in the figure.
I'm here. Note that the drive means for reciprocating the moving table 5 in the X direction is not particularly featured in the present invention and is therefore not shown.

A workpiece P such as a steel plate or an acrylic plate is placed on the moving table 5, and a laser beam is emitted from above to perform cutting. The beam nozzle 6 that emits the laser beam is reciprocated in the front-back direction perpendicular to the moving direction X of the moving table 5, that is, in the direction of the arrow It will be done. Note that the main body of the laser processing machine including the laser oscillator and the like is not shown.

First, the movable table 5 is in the shape of a flat oblong box with an open top and a bottom, and its front, rear, left and right peripheral side walls 5a, 5
b. 5c A workpiece supporting grid 7 made of a large number of thin plates is arranged equally over the entire inside area, and the inside of the table is divided into a plurality of compartments A- in the table movement direction (X direction). A plurality of partition walls 8 to divide into B-C-D-E
are provided at equal intervals and parallel to the left and right side walls 5a and 5c. The upper end surfaces of the lattice 7 and partition walls 8 are all flush with the peripheral sides Bl 5 a, 5 b, 5 c of the movable table 5, and the workpiece P such as a steel plate or acrylic plate is placed on the upper surface thereof. These are all different sizes! Even if it is A, it can be supported and placed horizontally. Further, as shown in FIG. 3, the grid 7 is arranged only in the upper half of the movable table 5, leaving a large gap between it and the bottom wall 5c of the lower table 5. The partition wall 8 is vertically wide and extends from the upper surface of the λ6 movable table 5 to the lower end bottom wall 5d-. That is, the movable table 5 has an internal space that is oriented in the table movement direction (
It is completely divided into five compartments A to EVc by partition walls 8 arranged at equal intervals with respect to the Supporting lattice 7f: This configuration has a supporting lattice 7f.

Further, the movable table 5 has a front side wall thereof, 5b, that is,
On the side wall 5b arranged parallel to the table movement direction (X direction), there are horizontally arranged smoke collection ports 9a, 9b, 9C, 9d, and 9e in the form of independent oblong holes corresponding to each of the compartments A to E, respectively. The opening is arranged at the

On the other hand, the left and right legs 2, 2 at the middle part of the table pedestal 1
A support arm lO・10 protrudes diagonally upward from the front.
are attached, and a smoke collection hood 12 is provided at the upper ends of both support arms 1θ and lθ via biasing means such as spring mechanisms 11, which will be described later. This smoke collection hood J2
The box-shaped hood main body 13 is open at the rear and has a duct connection 013a projecting directly downward from the bottom, a slide plate 14 made of an oblong steel plate or the like is fixed to the rear surface of the hood main body 13 by welding, etc. A liner 15 made of synthetic resin such as Teflon, which is adhesively polymerized and has a small TC friction coefficient, is further attached to the rear surface of the slide plate J4, and the central portion between the slide plate 14 and the liner 15, that is, the hood body 1.
A smoke suction port 16 of approximately the same size as one of the smoke collection ports 9a to 9e of the movable table holder is formed in a portion directly behind the hood body 13, and both left and right portions of the hood body 13 are connected to the support arm. 10-10 Upper end spring mechanism 11.11
By supporting the hood, the center of the hood is always located directly in front of the movement line of the beam nozzle 6 of the laser processing machine, and the outer surface (611 surface) of the front wall 5b of the movable table 5 is airtight with the rear liner 15. While sliding in contact with the smoke inlet 1
It communicates with at least one smoke collection port of the movable table 5 located at a position opposite to the smoke collection port of the movable table 6 (in some cases, it straddles the smoke collection port of 2f&!il).

Moreover, the slide plate 14 of the smoke collection hood 12 and the one liner nano 5 attached thereto have a vertical width equal to the front wall 5b of the movable table 5, and have a total length that covers three compartments A to E. The horizontally long one with the hood body 13
The long overhanging parts on both the left and right sides are the open cover 17 and the noah, and the closed covers 17 and 17 on both sides are the outer surface (front surface) of the Ai+ side wall 5b of the movable table 5 as described above.
The hood is always in airtight sliding contact with the hood, and among the smoke collection ports 9a to 9e there, the smoke collection ports on both sides of the one communicating with the hood smoke intake port 16 are respectively closed.

Note that the spring mechanism 11-11 has support arms 19, 19.
A shaft 20 is inserted through the shaft 20 so that the front and rear axes can be freely penetrated, a pair of rear brackets 2 and 22 connected to the front and rear ends of the shaft 200 and attached to both sides of the hood body 13, the rear bracket 22 and the guide. 18 and a compression coil spring 24 interposed between the spring washer 23 at the rear end of the shaft and a compression coil spring 24 which is wound with pVc 20 times, respectively, and includes the entire smoke collection hood 12 (closing cover 12) 7. ) are guided and supported by the shafts 20 and 20 on both sides to the njJ rear &j+ pJ function while the respective compression coil springs 24 and 24
In turn, the liner 15 is pressed rearward to the outer surface of the front wall 5b of the movable table 5 to the extent that it does not impede table movement and is kept airtight.

In addition, the duct connection port on the lower side of the smoke collection hood 12) 3a
In order to allow the forward and backward movement of the hood 12, the flexible duct 25'f! : A smoke suction duct 26 is connected through the table frame 1, and this duct 26 is passed through a groove 27 formed in the lower floor of the table pedestal 1 and connected to a dust collector with a smoke suction blower (not shown) installed at an appropriate location. Note that a bag filter, an electric dust collector, or the like is selected as the dust collector depending on the properties of dust-containing gas generated by laser processing of the workpiece P.

In the smoke collection device for the above-mentioned rq type laser processing machine, the workpiece P is set on the upper surface of the moving table 5, and in this state, the moving table 5 is moved in the X direction, and the beam nozzle 6'ky While moving in each direction under automatic control or the like, a laser beam is emitted from the beam nozzle 6 to cut the workpiece P into a predetermined shape. During this laser processing, the smoke collection hood J2 is not related to the movement of the movable table 5 (always located in front of the laser processing area, that is, directly in front of the beam nozzle 6, and In order to communicate with the compartment directly below the beam nozzle 6 where laser processing is performed, for example, in the illustrated state, only the smoke collection port 9c on the front side wall and the hood smoke intake port 16 communicate with the central compartment C. , Dust-containing gas such as fume generated by laser processing is forcibly sucked into the compartment C directly below the processing area, and from inside the transfer compartment C, it is sent from the smoke collection hood 2 to the dust collector via ducts 25 and 26. Conducts electricity and collects dust. At this time, the dust-containing gas does not spread widely outside of compartment C.
The smoke will be collected in a concentrated manner.

However, when the moving table 5 moves, for example, to the left from the state shown above, the smoke collection port 9c of the compartment C gradually shifts leftward from the hood smoke intake port 16, and the beam nozzle 6 The smoke collection port 9d of the compartment on the right, which approaches the bottom, gradually comes to communicate with the hood smoke intake port 16.

With this, the hood smoke inlet 16 is divided into compartment C11! l: By communicating with D by spanning both smoke collection ports 9c and 9a.

The generated dust-containing gas is sucked into the compartment C-D, that is, the two chambers C-D located near the lower side of the laser processing part, and is passed from both chambers through the smoke collection hood 12 and ducts 25 and 26. Conducts electricity to the dust collector and collects dust. In this state, the portion of the smoke collection port 9c that is shifted to the left with respect to the hood smoke intake port 16 and the portion of the smoke collection port 9d that is not yet communicated and remains on the right side are completely removed by the closing covers 17, 17, respectively. This prevents outside air from entering or gas from leaking. In this way, when the moving table 5 further moves to the left and the center of the compartment comes to be directly below the beam nozzle 6, the smoke collection port 9d of that compartment comes into contact with the hood smoke inlet J6, and the generated dust-containing gas is Smoke is sucked only into the compartment, and the duct 25/2 is connected from the smoke collection hood 12.
Valve 6 is connected to the dust collector to collect dust.

Dust-containing gas generated during laser processing of the workpiece P is diffused throughout the entire area inside the movable table 5, and concentrated from only the two compartments into the smoke collection hood 12 for dust collection processing. In this case, there is no needless inflow of outside air or gas leakage, and efficient dust collection is possible.

Note that when the workpiece P placed on the moving table 5 is small, an appropriate cover grate ( (not shown) is recommended.

Since this invention is made as described above, the connection between the smoke collection port on the side wall of the movable table and the smoke collection hood is reliable, there is no inflow of outside air or gas leakage, and it is possible to spread the dust-containing gas generated during laser processing over a wide area. It is possible to efficiently collect dust by intensively collecting smoke in a small compartment inside the movable table without dispersing it into the room, and it is possible to reliably improve the working environment, and it is very simple and advantageous in practical terms with excellent economic efficiency. belongs to.

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially omitted plan view, Fig. 2 is a front view of the same, Fig. 3 is a sectional view taken along the line FIG. 4 is a sectional view taken along the line IV--IV in FIG. 2.

l...Table mount, 2...Legs, 3...Guide rail, 4...Dovetail groove member, 5...Moving table,
5a, 5b, 5c...side wall, 5d...bottom wall, 6...
・Beam nozzle, 7... Grid, 8... Partition wall, A to E... Compartment chamber, 9a to 9e... Smoke collection port, 10...
・Support arm, 11...biasing means (spring mechanism) No. 2・
... Smoke collection hood, 13 ... Hood body, 14 ... Slide plate, 15 ... Liner, 16 ... Smoke intake port, 17 ... Closing cover, 18 ... Cylindrical guide, 19
... Bearing, 20 ... Shaft, 2 No. 22 ... Bracket, 23 ... Spring washer, 24 ... Compression coil spring, 25 ... Flexible duct, 26 ... Duct, 22 ...・Groove, P...Workpiece.

Applicant's agent Takehiko Dosuzu, patent attorney

Claims (3)

[Claims] (1) A workpiece is placed on a flat box-shaped movable table with an open top that moves back and forth in a predetermined direction, and a laser beam is emitted from above to capture dust-containing gas generated during cutting and other processing. In a dust collecting device for a laser beam processing machine, a partition wall is provided in the movable table to divide the inside of the table into a plurality of compartments in the direction of movement of the table, and a smoke collection hood having a smoke collection mouth opening at a location corresponding to each compartment, and communicating with at least one smoke collection mouth by disposing the smoke collection mouth at a position where the outer surface of the side wall of the movable table with the opening comes into sliding contact; In addition, a closing cover is provided that protrudes from both sides of the smoke collection hood and closes the smoke collection port located next to the smoke collection port that communicates with the smoke collection hood, and the smoke collection hood is further closed with a duct valve. A dust collector for a laser processing machine, characterized in that it is connected to a dust collector. (2) Smoke collection in the laser processing machine according to claim 1, characterized in that the dust collection hood and the closing cover are in sliding contact with the outer surface of the side wall of the movable table via a liner made of a material with a small coefficient of friction. Device. (3) The smoke collection hood and the closing cover are suppressed and supported on the outer surface of the side wall of the movable table by a biasing means such as a spring mechanism to such an extent as not to impede the movement of the table. A smoke collection device in a laser processing machine as described in 2.