JPH0214877Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a dust collection device for a processing machine that performs thermal cutting using, for example, a laser or a plasma jet.

Conventionally, for example, in a uniaxial optical scanning laser processing machine, a suction duct was installed near the processing head as a processing device for the generated dust, and the dust generated during processing was sucked and removed by the suction duct. However, this configuration has the problem of not being able to completely dispose of the generated dust, making it difficult to maintain a good working environment.

This idea was made in view of the conventional problem, and in uniaxial processing head scanning processing machines such as uniaxial optical scanning laser processing machines, scrap and dust are generated on the processing head movement line. Focusing on this, we installed an outer frame with an opening that covers the movement range of the processing head directly below the workpiece processing section, installed a scrap box inside this outer frame, and connected a suction device to the side of the outer frame. To provide a dust collection device for a processing machine which can collect and dispose of generated dust externally, and which can easily dispose of waste material produced during processing.

The embodiment shown in the figures will be described below. 1st
3 to 3 show the entirety of a laser processing machine 1 as an embodiment of this invention, in which a laser beam from a laser oscillation device 3 passes through a conduit 5 and beam vent devices 7 and 9 to a processing head 11. I feel like I'm being guided by this. The processing head 11 is vertically movable and positionable by a vertical drive device 15, and horizontally movable and positionable by a lateral drive device 15.
The laser processing machine 1 also includes a work table 17, on which a part of the work table 17 is provided with a material carriage 21 equipped with a clamping device 19. This material carriage 21 is capable of moving and positioning the clamping device 19 in a direction perpendicular to the moving direction of the processing head 11.
The work on the work table 17 is clamped by the clamp device 19 and horizontally moved and positioned.

When processing a workpiece with the laser processing machine 1 having the above configuration, the material carriage 21 is driven, and the workpiece clamped by the clamping device 19 is
A desired part of the workpiece is brought directly below the machining head 11 by a combination of two-dimensional movement by moving the workpiece a certain distance in one axis direction and at the same time moving the machining head 11 a predetermined distance by the lateral drive device 15. It performs the cutting process.

A work shooter 23 and a dust collector 25 are provided below the processing head 11 of the laser processing machine 1 configured as described above.First, the work shooter 23 will be explained in detail. As shown in FIGS. 1 and 3, a part of the work table 17 is provided with an opening/closing table 27 that can be opened and closed. Below this opening/closing table 27, the work shooter 23, extension shooter 29, and product stock 31 are provided.

Referring to FIGS. 4 to 6, a connecting member 33 is attached to the lower surface of the work table 27, and this connecting member 33 is connected to parallel links 35a, 35.
b is connected to the rotation support member 37, and can be moved up and down horizontally with respect to the rotation support member 37. One end of this rotary support member 37 is pivotally connected to a shaft support 39 on the outer frame of the dust collector 25, which will be described later. Further, an angle member 41 is horizontally suspended in the intermediate portion of this rotation support member 37. An elevating cylinder 45 is swingably supported on an arm 43 extending from this angle member 41, and a piston 47 of this elevating cylinder 45 is connected to a connecting pin 49 which is installed at the lower end of the parallel link 35a.
is connected to.

A first link 51 for opening and closing is further connected to the lower end of the rotation support member 37, and the processing machine 1
The upper end of the second link 55 for opening and closing, whose lower end is connected to the fixing part 53, is connected to the lower end of the first link 51 by a horizontal connecting pin 57.
A piston 61 of an opening/closing cylinder 59 is connected to the center of the connecting pin 57. The opening/closing cylinder 59 is pivotally supported by an arm 63 extending from the fixed part 53. In addition, as shown in FIG. 6, sensors 65 and 6 are used for sequence control.
7 are provided respectively.

Next, the operation of the work computer 23 will be explained based on FIGS. 7 to 9.

Laser Processing The opening/closing table 27 is supported flush with the work table 17, and in this state, the work W placed thereon is laser processed. In this state, as shown in FIG. 7, the parallel links 35a and 35b are in a substantially vertical state, and the opening/closing table 27 and the connecting member 33 are pushed upward relative to the rotation support member 37. It is in. Further, the first link 51 and the second link 55 are aligned on a straight line, slightly beyond the dead center, and support the rotation support member 37 in a horizontal state.

Lowering the Table From the above state, the lifting cylinder 45 is first driven to cause the piston 47 to protrude as shown in FIG. As a result, the parallel link 35a, which is connected by the pin 49, rotates about the connection part with the rotary support member 37 to become almost horizontal, and in conjunction with this, the horizontal link 35b also rotates. Connecting member 33 and opening/closing table 2 interlocked with this
7 in a horizontal position. Due to this lowering of the opening/closing table 27, the cut products and generated chips remaining on the opening/closing table 27 together with the work are separated from the work W and are moved to the opening/closing table 27.
Descending with 7. At this time, the work W is supported on the work table 17 and therefore does not descend. Therefore, only the product and chips are separated from the workpiece W.

Shute operation Next, the opening/closing table 27 is rotated downward by the driving of the opening/closing cylinder 59. That is, by driving the opening/closing cylinder 59 and pulling the piston 61, the connection point of the first link 51 and the second link 55 is pulled down by the movement of the connecting pin 57, and as shown in FIG. The member 37 is rotated downward. As the rotary support member 37 rotates, the opening/closing table 27 connected thereto by the connecting member 33 also rotates downward and tilts. If the opening/closing table 27 is tilted in this way, the products and chips placed on it will slide down the slope and fall down along the extended chute section 29 as shown in FIG. 31 will be stocked.

Return Operation To return the opening/closing table 27 to its original state, the procedure described above is reversed. That is, by first protruding the piston 61 of the opening/closing cylinder 59, the first link 51 and the second link 55 are pushed up and returned to the position shown in FIG. 7, which is slightly beyond the dead center. As a result, the opening/closing table 27 returns to a substantially horizontal state. After this, the lifting cylinder 4
5 to draw in the piston 47, return the parallel links 35a and 35b to their original, almost vertical state, and push up the opening/closing table 27 parallel to the rotation support member 37. In this way, the opening/closing table 27 is connected to the work table 1 as shown in FIG.
It will return to a horizontal state flush with 7.

Incidentally, the sensor 65 detects when the opening/closing table 27 returns to a state flush with the work table 17. Further, the sensor 67 is connected to the first link 51 and the second link when the piston 61 of the opening/closing cylinder 59 protrudes.
This is detected when the link 55 is returned to its initial state as shown in FIGS. 4 and 5.

In this way, the first link 51 and the second link 5
If the node 5 is driven by the cylinder 59 to open and close the opening/closing table 27, both links 51 and 55 will constitute a toggle mechanism, and the opening/closing table 27 will open and close in a state slightly beyond the dead center. By supporting the opening/closing table 27 in a horizontal state, even if a large downward force is applied to the opening/closing table 27, this table 27 will not be tilted, and even if the table 27 is heavy, it will have a relatively small driving force. The opening/closing operation can be performed by the opening/closing cylinder 59.

Next, the dust collector 2 shown in FIGS. 10 to 13
5 will be explained in detail. As explained in FIG. 1, the dust collector 25 is provided adjacent to the work shooter 23 and directly below the machining head 11, and is for collecting small residual materials and dust generated by laser machining. This dust collecting device 25 includes an outer frame 71 having an opening 69 with a length that includes the entire moving range of the processing head 11, and a scrap box 73 provided in the outer frame 71 so as to be freely put in and taken out. It is configured. This outer frame 71 is fixed to a fixed part of the processing machine 1 by a fixing member 75. A suction device 77 is connected to the side surface of this outer frame 71. Furthermore, sealing pallets 79 and 81, which are vertically disposed from the opening/closing table 27 and the work table 17, are engaged with the opening 69 of the outer frame 71, as shown in detail in FIG. As a result, a narrow, sealed air flow path 83 is formed between the opening 69 and the irradiation portion of the laser beam LB.

A heat-resistant carbon graphite material 85 is laid on the bottom of the scrap box 73. Furthermore, a guide protrusion 87 is formed at the center of the lower surface of the scrap box 73 along the moving direction of the processing head 11. A guide rail 89 with rollers provided on the upper surface of the bottom of the outer frame 71 is connected to the scrap box 7.
3 is slidably supported, and its sliding direction is regulated by a protrusion 87. Further, a lid 91 is provided on one side of the outer frame 71 for taking the scrap box 73 in and out.

The suction device 77 is attached to one side of the outer frame 71.
It is connected to cover two exhaust ports 93. This suction device 77 itself also has a double structure, with two suction ports 97 formed in the first wall 95 and one main suction port 101 provided in the second wall 99. A suction duct 103 is connected to the main suction port 101.

In order to detect the presence of the scrap box 73, a sensor 105 is installed at the lower end of the outer frame 71 on the lid 91 side. Further, a porous elastic material 107 like a sponge is pasted inside the outer frame 71, and an exhaust port 93 and a main suction port 101
Filters 109 and 111 are provided in the portions shown in FIG.

To explain the operation of the dust collector 25 having the above configuration, by operating the suction device 77, the 11th
As shown in the figure, air is sucked into the air flow path 83 from the vicinity of the processing head 11 and guided into the outer frame 71. As shown in FIG.
be sucked into. In the suction device 77, the liquid first passes through the two suction ports 97 of the first wall 95 and reaches the second wall 99, where it is sucked into the main suction port 101 and guided to the suction duct 103. In this way, the air sucked in from the vicinity of the processing head 11 can be sucked in stages within the outer frame 71 by the three types of exhaust ports 93, suction ports 97, and main suction ports 101, and the entire air inside the outer frame 71 can be suctioned in stages. can be discharged to the outside by the suction duct 103.
Further, residual material generated by processing by the processing head 11 is received by a scrap box 73 and stored there. And Scrapbox 73
When the scrap box 73 is full, it can be disposed of outside by opening the lid 91 and pulling out the scrap box 73.

Furthermore, the laser beam emitted from the processing head 11 may be directly irradiated to the bottom of the scrap box 73 inside the outer frame 71, but since the carbon graphite material 85 is provided in this area, the scrap box cannot be removed. 73 can be prevented from being damaged by the laser beam.

As can be understood from the above description of the embodiments, the present invention is capable of reciprocating a material carriage 21 in a uniaxial direction, which is equipped with a clamping device 19 for gripping a workpiece placed and supported on a worktable 17. A processing head 11 that is movably provided and performs thermal cutting on the work is mounted on the work table 1.
A dust collection device for a thermal cutting machine is provided which is movable up and down at a position above the work table 7 and movable in a direction perpendicular to the direction of reciprocating movement of the material carriage 21, and at a position below the work table 11. A box-shaped outer frame 71 provided at the lower part of the work table 17 is provided with a length approximately equal to the width of the work table 17, and the upper part of this outer frame 71 is connected to the processing head 1.
The side surface of the outer frame 71 is provided in communication with a narrow and long air flow passage 83 provided in the work table 17 corresponding to the movement range of the outer frame 71, and has a plurality of exhaust ports 93 provided at appropriate intervals in the longitudinal direction of the outer frame 71. A box-shaped first wall 95 covering the upper part is provided with an appropriate number of suction ports 97 at positions corresponding to the intermediate portions of the respective exhaust ports 93, and the suction ports 97 are connected to the suction duct 103. .

That is, since the present invention relates to a thermal cutting machine in which the workpiece moves in one axis and the machining head moves in a direction perpendicular to the moving direction of the workpiece, the outer frame 71 for the dust collection box is is provided with a length approximately equal to the width of the work table 17. The upper part of the outer frame 71 communicates with a narrow and long air passage 83 provided in the work table 17 corresponding to the movement range of the processing head 11.

Therefore, during processing, the air flow passage 83
Air is sucked from the air flow path 8.
In the present invention, a plurality of exhaust ports 93 are provided at appropriate intervals in the longitudinal direction on the upper side of the outer frame 71 so that the suction action is performed uniformly over the entire length of the outer frame 71. A box-shaped first wall 95 covering the upper part is located in the middle of each exhaust port 93,
A suction port 97 connected to the suction duct 103 is provided.

Therefore, according to the present invention, the suction action of the suction port 97 acts equally on the exhaust ports 93 on both sides, and is not concentrated on a specific exhaust port 93. Therefore, the suction action is uniformly performed over the entire length of the narrow and long airflow passage 83. Therefore, during thermal cutting of a workpiece, there is no problem such as insufficient suction action due to the machining head 11 being biased to one side.

[Brief explanation of the drawing]

Fig. 1 is a front view of a laser processing machine used in an embodiment of this invention, Fig. 2 is a side view of the same laser processing machine, Fig. 3 is a plan view of the same laser processing machine, and Fig. 4 is a third FIG. 5 is a sectional view taken along the line - in FIG. 4, FIG. 6 is a sectional view taken along the line - in FIG. FIG. 10 is a sectional view taken along the line -- in FIG. 3. Figure 11 is the same as in Figure 10.
XI-XI line sectional view, Figure 12 is XII in Figure 11
-XII line sectional view; FIG. 13 is a -XII line sectional view in FIG. 12; 1... Laser processing machine, 11... Processing head, 1
7... Work table, 23... Work shooter, 25... Dust collector, 27... Open/close table,
33... Connection member, 35a, 35b... Parallel link, 37... Rotation support member, 45... Lifting cylinder, 47... Piston, 51... First link,
55...Second link, 59...Opening/closing cylinder,
61... Piston, 69... Opening, 71... Outer frame, 73... Scrap box, 77... Suction device, 85... Carbon graphite material, 87...
... Projection, 89 ... Guide rail with roller, 93 ...
...Exhaust port, 97...Suction port, 101...Main suction port, 103...Suction duct.

Claims (1)

[Scope of utility model registration request] A material carriage 21 equipped with a clamping device 19 for gripping a workpiece mounted and supported on a worktable 17 is provided so as to be able to reciprocate in a uniaxial direction, and a processing head 11 for thermally cutting the workpiece is connected to the workpiece. A dust collecting device for a thermal cutting machine is provided which is movable up and down at a position above the table 17 and movable in a direction perpendicular to the reciprocating direction of the material carriage 21. table 17
A box-shaped outer frame 71 is provided at the bottom of the work table 17 and has a length approximately equal to the width of the work table 17.
1 is provided so as to communicate with a narrow and long air flow passage 83 provided in the work table 17 corresponding to the movement range of the processing head 11, and a plurality of exhaust ports 93 are provided at appropriate intervals in the longitudinal direction of the outer frame 71. The outer frame 71 provided
A box-shaped first wall 95 that covers the upper side surface of is provided with an appropriate number of suction ports 97 at positions corresponding to the middle portions of the respective exhaust ports 93, and the suction ports 97 are connected to the suction duct 103. A dust collector for a thermal cutting machine featuring: