JPH0715170U - Dust collector of processing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a dust collector for a processing machine, which has a simple structure, can reduce costs, and can be downsized. In a dust collecting device such as a laser or plasma processing machine equipped with a processing torch that can be moved in a plane on a work table, the dust collection device is movable in conjunction with a torch carriage to which the torch is attached, and A suction hood having a suction port facing the torch and an exhaust port connected to the dust collector is arranged, and in this hood, a water tank portion is formed directly below the torch, and spatter etc. generated during processing is generated in the water tank portion. Primary dust collection is possible. Instead of the water tank portion, a pretreatment filter may be provided together with the water tank portion. Further, the bottom of the water tank can be removed and the bottom can be opened to collect dust with a brush. It is also possible to provide a cylindrical body that is synchronized with the torch on the hood suction portion and wire-connect this to the torch via a spring.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dust collector for a processing machine, and more particularly, to an improvement of the dust collector for effectively removing dust and harmful dust and gas generated during processing by a laser or plasma processing machine.

[0002]

[Prior art]

 Generally, in laser or plasma processing machines, harmful fumes and fumes generated during processing are generated, so dust is removed. The processing machine is usually designed to move the torch in the XY plane, and it is necessary to effectively perform the suction action for collecting dust according to the movement of the torch.

Conventionally, as a method for removing harmful dust and gas generated from the above laser or plasma processing machine, for example, one having a structure shown in FIGS. 7 to 8 has been adopted. The processing machine has a work table 1 and a gate-shaped torch carriage 2 that moves along the table 1. The carriage 2 is provided with a processing torch 3 so that the torch 3 can be moved in the longitudinal direction of the carriage 2. This allows the torch 3 to move in the X direction along the longitudinal direction of the carriage 2 and in the Y direction determined by the carriage 2 moving on the work table 1, whereby the torch 3 can be moved to any position. It is possible to move in a plane. The work table 1 is formed in a container shape having an opening on the side of the carriage 2, and the table container 4 sucks and collects fumes and smoke generated during processing.

The dust collecting mechanism generally has a suction hood 5 arranged in the table container 4 and attached to the torch carriage 2. The suction hood 5 is opened in the torch 3 and the flexible hood 6 is provided. It is connected to the dust collector 7 installed outside the container. A pre-duster 8 is installed in front of the dust collector 7 to remove a relatively large amount of dust in advance so as to reduce the load on the dust collector 7. Alternatively, in Japanese Patent Publication No. 58-103973, the entire lower part of the table container 4 is submerged in a water tank, whereby relatively large dust such as spatter is submerged, and the suction hood 5 and the duct 6 following it. Some of them make it easier to collect dust by controlling the rise in ambient temperature. Further, as disclosed in Japanese Utility Model Publication No. 3-49833, there is a method of interlocking the suction hood 5 with the processing torch carriage 2 in order to efficiently suck the dust gas generated from the vicinity of the processing position.

[0005]

[Problems to be solved by the device]

 However, the method shown in FIGS. 7 to 8 requires an installation space for the pre-duster 8 in addition to the dust collector 7, which causes a problem that the cost increases because the entire system becomes large. Furthermore, since there is a pressure loss of the air flow in the preduster 8, the suction force is reduced. Further, in the one disclosed in Japanese Patent Publication No. 58-103973, since the inside of the water tank is polluted with harmful dust and the like and a large amount of water is used, the treatment of a large amount of polluted water becomes a problem. Furthermore, in the technique disclosed in Japanese Utility Model Publication No. 3-49833, a relatively large amount of dust in processing smoke is accumulated on the connecting pipe portion between the suction hood and the dust collector, and the connecting pipe is worn or damaged (particularly (When using a flexible duct). In addition, when the work position is moving to the end of the work table, the suction hood 5 reaches the end of the work table 1 before the torch 3, so the movement of the torch 3 is restricted by the suction hood 5. Otherwise, the suction hood may be damaged. For this reason, it is necessary to expand the moving area of the suction hood beyond the working area, resulting in an increase in the size of the device.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a dust collecting apparatus for a processing machine, which has a simple structure, can be reduced in cost, and can be downsized. .

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the dust collecting apparatus for a processing machine according to the present invention is firstly a collection apparatus for a laser or plasma processing machine equipped with a processing torch installed so as to be movable in a plane on a work table. In the dust device, a suction hood that is movable in conjunction with a torch carriage to which the torch is attached and that has a suction port facing the torch and an exhaust port connected to a dust collector is arranged, and the hood is A water tank is formed directly below the torch, and spatters generated during processing can be primarily collected in the water tank.

Secondly, in a dust collecting apparatus such as a laser or plasma processing machine equipped with a processing torch that is capable of plane movement on a work table, it moves in conjunction with a torch carriage to which the torch is attached. A suction hood that has a suction port facing the torch and an exhaust port connected to the dust collector is provided, and this hood has a pretreatment for dust gas in the middle of the route from the suction port to the exhaust port. A filter is provided.

Thirdly, in a dust collector such as a laser or plasma processing machine equipped with a processing torch that is capable of plane movement on a work table, it moves in conjunction with a torch carriage to which the torch is attached. Provide a suction hood that is enabled and has a suction port facing the torch and an exhaust port connected to the dust collector, and open the bottom of the hood facing the torch to face the work table floor. The opening is provided with brush means between it and the work table floor.

Fourthly, in a dust collecting apparatus such as a laser or plasma processing machine equipped with a processing torch that is capable of plane movement on a work table, it moves in conjunction with a torch carriage to which the torch is attached. A suction hood is provided which has a suction port facing the torch and an exhaust port connected to the dust collector, and a water tank is provided below the suction port of the hood, and the torch carriage is provided above the water tank. A cylindrical body that is movable in synchronism with a torch that moves along is accommodated, and this cylindrical body has a suction port facing the torch and an exhaust port opening in the suction hood.

Fifth, in a dust collecting apparatus such as a laser or plasma processing machine equipped with a processing torch that is capable of plane movement on a work table, it moves in conjunction with a torch carriage to which the torch is attached. A suction hood is provided which has a suction port facing the torch and an exhaust port connected to the dust collector, and the suction port of this hood is synchronized with the torch moving along the torch carriage. A movable cylinder is provided, and a suction port that faces the torch and an exhaust port that opens into the suction hood are formed in this cylinder. The torch synchronous movement mechanism of the cylinder is transferred to the carriage. And a roller part which rolls on the rail part and is attached to the cylinder body, and the torch and the cylinder body are connected in a loop to form an S-shaped loop in the cylinder body part. The elastic means is provided at the connecting portion of the wire means with the torch.

In the fourth or fifth configuration, the cylindrical body is faced with or immersed in a water tank portion formed in the suction hood.

[0013]

[Action]

 According to the first configuration, the harmful dust gas generated in the vicinity of the processing position passes through the suction port of the suction hood that is interlocked with the processing torch carriage, and first reaches the water tank portion provided in the suction hood, Here, large dust such as spatter is cooled in the water tank and submerges in the hood without sticking to it. The dust gas in which large dust is trapped is cooled, and the suction hood itself is also water-cooled, so it is not deformed by the heat generated during processing, and the dust gas that has passed through the water tank is exhausted from the suction hood. Go through the mouth, pass through a flexible duct, etc., and reach the dust collector. A large amount of this dust gas is trapped in the water tank in advance, so the dust collector load can be reduced.

Further, according to the second configuration, the harmful dust gas generated in the vicinity of the processing position passes through the intake port of the suction hood that is interlocked with the processing torch carriage, and is used for pretreatment of the dust gas. Reach the filter. This filter traps relatively large particles in the dust gas, thus causing wear and damage to the duct and amplifying the dust collector load. Then, the dust gas filtered by the filter passes through the exhaust port of the suction hood, passes through the flexible duct, etc., and reaches the dust collector.

According to the third invention configuration, when there are many residual cuts and the like generated during processing, they are not deposited in the suction hood but can be deposited on the table container floor below the hood. The accumulated debris is accumulated in the internal area surrounded by the brush provided under the suction hood and does not leak outside.

According to the fourth configuration, the harmful dust gas generated at the processing position is sucked and guided by the cylinder facing the torch and introduced into the suction hood. Large dust such as spatter is put through the cylinder into the water in the water tank provided under the hood suction, where it is cooled and submerged without sticking. Since the water tank is formed in the suction hood, a small amount of water is sufficient, and the cylinder and the hood are cooled and dust gas is cooled. Since the amount of water in the water tank is small, it is easy to treat, and thermal deformation can be prevented by the cooling effect of the peripheral area.

According to the fifth configuration, when the processing torch moves in the longitudinal direction of the suction hood, the cylindrical body is stopped at the work table end, and when the torch further moves to the table end side, the torch both ends are moved. Since the elastic expansion / contraction means for connection with the wire means connected to the expandable / contractible expands / contracts, the torch can be moved without applying an excessive load to the tubular body and torch. Since the torch and cylinder move in conjunction with other movements in the center of the work table, dust gas is always sucked directly under the machining position, and efficient dust collection can be performed.

[0018]

【Example】

 Hereinafter, a specific embodiment of the dust collector for a processing machine according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a suction hood 10 constituting an essential part of the dust collecting apparatus according to the first embodiment. This is the torch carriage 2 of the laser or plasma processing machine shown in FIGS. It is attached to the lower surface. That is, the suction hood 10 shown in FIG. 1 will be described with reference to FIG. 8. The suction hood 10 is formed by a box-shaped container, which is arranged under the torch carriage 2 and fixed thereto. When the carriage 2 is guided and moved by the work table 1, the carriage 2 is mounted so as to move back and forth in the table container 4 together with the carriage 2. The suction hood 10 is composed of a front chamber portion 12 and a rear chamber portion 14. The rear chamber portion 14 side is attached to the carriage 2, and the front chamber portion 12 travels on the front surface portion of the carriage 2 immediately below the torch 3. Has been extended to. The width of the suction hood 10 is set so as to substantially match the inner diameter of the table container 4, and the hood side surface is movable along with the carriage 2 along the inner side surface of the table container 4. The upper surface of the front chamber portion 12 of the suction hood 10 is opened over the moving range of the torch 3 traveling along the carriage 2, and the suction portion introduces dust gas generated during processing by the processing torch 3. It has a mouth of 16. The rear chamber portion 14 arranged at the lower portion of the torch carriage 2 has an exhaust port 18 formed on the bottom surface thereof and is connected to the flexible duct 6. The flexible duct 6 is connected to the rear wall of the table container 4, and is connected to the dust collector 7 installed outside the table container 4 via the flexible duct 6.

In the structure of the suction hood 10 as described above, the upper surface portions of the front chamber portion 12 and the rear chamber portion 14 described above are set to be on the same plane, but the depth of the front chamber portion 12 is equal to that of the rear chamber portion 14. The depth is set deeper than that, and water 20 is put in the bottom portion of the front chamber 12 to be used as a water tank. Therefore, this water tank portion is located below the torch 3, and when processing by the torch 3, the spatter is received in the water 20 in the water tank portion and cooled by the water 20. A partition wall 22 is formed between the front chamber portion 12 and the rear chamber portion 14, and a ventilation window 24 is opened in an upper portion of the partition wall 22. The dust gas introduced from the suction port 16 at the time of processing and entering the front chamber portion 12 can flow to the rear chamber portion 14 through the ventilation window 24. Needless to say, the ventilation window 24 is set above the water level of the water tank.

Further, in this embodiment, the flow path in the suction hood 10 from the suction port 16 to the exhaust port 18 is cut off, specifically, between the ventilation window 24 in the rear chamber portion 14 and the exhaust port 18. The pre-processing filter 26 is arranged so as to do so. The filter 26 traps spatters or the like in the dust gas with the water 20 in the water tank, and then filters relatively larger particles from the gas introduced into the rear chamber 14.

Further, a drain port 28 is provided on the side of the suction hood 10 on the side of the front chamber 12 and a dust outlet 30 is provided on the side of the rear chamber 14.

In the first embodiment configured as described above, the harmful dust gas generated in the vicinity of the processing torch 3 is sucked from the intake port 16. The spatter generated at the time of processing is high in temperature, and the deposited spatter may stick to the bottom of the front chamber 12, but in the embodiment, since it is cooled by the water 20 in the water tank, there is no fear of sticking. Further, the water 20 can be drained from the drain port 28 as needed. The dust gas from which the spatter and the like has been removed further passes through one or a plurality of ventilation windows 24 and reaches the dust gas pretreatment filter 26. The relatively large particles in the dust gas are filtered by this filter 26, pass through the exhaust port 18, pass through the duct 6, and reach the dust collector 7. By using this hood 10, the preduster 8 is unnecessary. Further, since heavy substances such as spatter or residual chips generated during processing are dipped and collected in the water tank portion 20, they may be post-treated by drainage. Since the amount of this treated water is considerably smaller than the volume of the suction hood 10, the treated amount can be small. The dust discharge port 30 has one end fixed by a stopper so as to be openable and closable, and is opened to replace the filter 26 and discharge dust accumulated before and after the filter.

Next, FIG. 2 shows a second embodiment. In the second embodiment, water 20 is not put into the front chamber 12, and heavy objects such as spatter and residual debris generated during processing are accumulated and collected at the bottom of the front chamber 12. . In order to discharge the deposits, the bottom of the front chamber 12 can be opened and closed, and the opening / closing bottom 32 is opened and discharged as necessary. Since other configurations are similar to those of the first embodiment, the same constituent members are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, spatters, residual debris, and the like are collected on the openable / closable hood front chamber bottom 32, so that this deposit can be discharged whenever necessary.

FIG. 3 shows a third embodiment. In this embodiment, the bottom of the front chamber 12 of the suction hood 10 is opened, and the wire brush 36 is attached to the bottom opening side surface 34. If there are many residual cuts that occur during processing, it is better not to deposit the residual cuts on the bottom of the front chamber, let the bottom pass, and accumulate under the hood. In this case, the wire brush 36 prevents the dust from leaking from under the hood.

FIG. 4 shows the structure of the suction hood 10 used in the dust collector of the fourth embodiment. In this fourth embodiment, the suction port 16 of the suction hood 10 is provided with a cylindrical body 38 that moves laterally in conjunction with the torch 3. That is, the torch 3 can be moved laterally along the carriage 2, and the suction port 16 is opened so as to cover the entire lateral movement range, but dust gas is not introduced into the suction hood 10. In order to perform it accurately, it is projected upward from the suction port 16 so as to face the torch 3. This cylindrical body 38 has a substantially square cross-sectional area with a minimum cross-sectional area for sucking the dust gas ejected from the torch 3 side during processing so as not to diffuse the suction gas, and is attached to the suction port 16 to form a rectangular shape. It is mounted so as to be laterally movable along the suction port 16 of the cross section. The lower portion of the tubular body 38 is immersed in the water 20 in the water tank portion formed in the front chamber portion 12, and spatter and the like introduced from the tubular body suction port 40 opened at the upper end of the tubular body 38 inside the tubular body 38. I am trying to drop it on the water surface. An exhaust window 42, which is connected to and communicates with the ventilation window 24 formed in the chamber partition wall 22, is formed on the rear surface above the water level surface of the cylindrical body 38. In this embodiment, since the tubular body 38 moves laterally, the ventilation window 24 formed in the chamber partition wall 22 is formed over the entire length in the hood width direction, and the tubular body exhaust window 42 is always formed regardless of the moving position of the tubular body 38. Is communicated with the hood chamber ventilation window 24.

A mechanism for moving the tubular body 38 synchronously with the torch 3 is shown in FIGS. The beam portion of the gate-shaped torch carriage 2 mounted on the work table 1 is provided with a lateral movement mechanism of the torch 3, which is constituted by a pinion rack mechanism or a screw rod mechanism as shown in the drawing. In the illustrated example, a motor 44 is attached to one end of the carriage beam portion, and a screw rod 46 that is rotationally driven by this is horizontally installed. The torch 3 has a moving nut (not shown) that is screwed into the screw rod 46, so that the torch 3 can be moved to any position.

On the other hand, a plate 48 extending upward from the upper edge of the tubular body 38 is provided, to which a pair of rolling rollers 50R and 50L are attached, and a plate 2 of the carriage 2 is provided along the moving direction of the tubular body 38. It is adapted to roll on a rail 52 which is passed between legs and arranged in parallel with the screw rod 46. The plate 48 and the torch 3 are connected by the loop wire 54. One end of the loop wire 54 is connected to one side surface portion of the torch 3 via a spring 56 as an elastic expansion / contraction means, and the plate 48 is passed through guide rollers 58LU, 58LD provided on one end side leg portion of the carriage 2. While being linked to the tubular body 38 via the S-shaped loop portion 60 provided on the side of the torch 3, a spring 52 is also provided on the opposite side surface of the torch 3 via the guide rollers 58RU and 58RD on the leg side of the other end side of the carriage 2. Are connected via.

As shown in detail in FIG. 6, the S-shaped loop portion 60 on the side of the tubular body 38 that is linked to the loop wire 54 is composed of reversing rollers provided on the plate 48, which rolls to the left. The first reversing roller 62L is arranged above the roller 50L, and the second reversing roller 62R is mounted coaxially with the right rolling roller 50R. As a result, when the torch 3 moves to the right in FIG. 6 (arrow T), the wire 54 in the plate 48 portion moves to the left (arrow W), and the tubular body 38 integrated with the plate 48 becomes the same as the torch 38. Move in the direction. In particular, in this embodiment, the ends of the loop wire 54 are provided with springs 52 on both sides of the torch 3, and the tubular body 38 is regulated by the hood suction port 16 before the torch 3 reaches the movable end. From this state, the movement of the torch 3 is further allowed by the expansion and contraction of the spring 52. The rest of the configuration may be the same as that of the first embodiment, but the rear chamber 14 does not necessarily require a filter.

According to such an embodiment, first, spatter and dust gas generated near the processing torch 3 enter the inside of the cylinder 38 through the suction port 40 of the cylinder 38. At this time, spatter and large dust enter the water 20 and are cooled, so that they are submerged in the bottom of the water without sticking to the cylindrical body 38 and the inner wall of the front chamber 12. Thereafter, the dust gas passes through the upper exhaust window 42 of the cylindrical body 38, passes through the ventilation window 24 of the chamber partition wall 22, is exhausted from the exhaust port 18 of the rear chamber section 14, and is collected by the dust collector 7. Therefore, the suction hood 10 is prevented from being deformed by the heat generated during processing due to the cooling action of the water 20. Further, the drainage port 28 can discharge the water 20 as needed, and since this is a small amount, the water treatment is easy.

Further, in this embodiment, the tubular body 38 is moved in synchronization with the torch 3, but this is performed by the loop wire 54 and is connected to the torch 3 by the spring 56, so that the torch 3 is connected. Although the cylindrical body 38 reaches the work table 1 before 3 and stops, the spring 56 expands and contracts to adjust the length of the wire 54. Therefore, the processing torch 3 is easily moved to the work table 1 (torch carriage 2). Can move to the edge. As a result, it is possible to efficiently perform the dust gas suction action by the tubular body 38 without causing the movement obstacle of the torch 3.

Therefore, in the dust collector according to the present embodiment, spatter generated during processing can be collected and removed without being fixed to the hood side, and the heat of the hood 20 generated by the heat generated during processing can be collected. Deformation can be prevented. When moving, the cylinder 38 can be moved in conjunction with the torch 3 when working near the center of the work table 1, and the springs 56 at both ends of the torch 3 expand and contract as necessary at the end of the work table 1. As a result, the torch 3 can be moved smoothly, so that the cylindrical body 38 and the torch 3 are not damaged. Further, since the amount of water used is small, there is an advantage that water treatment is easy.

[0034]

[Effect of device]

 As described above in detail, by using the suction hood of the dust collector according to the present invention, it is possible to efficiently suck the dust gas generated in the vicinity of the processing position and prevent the abrasion and damage of the duct due to the suction gas. Since the pre-duster used to reduce the dust collector load is no longer required, it is possible to reduce the installation area and cost, and to eliminate the reduction in suction force due to pressure loss in the pre-duster. In addition, since the cylinder is placed at the hood suction port and moved in synchronization with the torch, the dust collection function can be performed efficiently, and movement obstacles due to the dimensional difference between the torch and the cylinder at the moving end can be improved. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a suction hood used in a dust collector according to a first embodiment.

FIG. 2 is a perspective view of a suction hood used in the dust collector according to the second embodiment.

FIG. 3 is a perspective view of a suction hood used in the dust collector according to the third embodiment.

FIG. 4 is a perspective view of a suction hood used in the dust collector according to the fourth embodiment.

FIG. 5 is an explanatory view of a moving mechanism of a cylinder attached to a suction hood used in the dust collector of the fourth embodiment.

FIG. 6 is an explanatory diagram of an S-shaped loop portion provided on the plate of the cylindrical body according to the fourth embodiment.

FIG. 7 is an overall configuration diagram of a conventional dust collector.

FIG. 8 is a cross-sectional configuration diagram of a conventional dust collector.

[Explanation of symbols]

 1 Working Table 2 Torch Carriage 3 Processing Torch 4 Table Container 5 Conventional Suction Hood 6 Flexible Duct 7 Dust Collector 8 Preduster 10 Suction Hood 12 Front Chamber 14 Rear Chamber 16 Suction Port 18 Exhaust Port 20 Water 22 Chamber Partition Wall 24 Ventilation Window 26 Pretreatment filter 28 Drain port 30 Dust discharge port 32 Opening / closing bottom 34 Front chamber bottom opening side face 36 Wire brush 38 Cylinder 40 Cylinder suction port 42 Cylinder exhaust window 44 Motor 46 Screw rod 48 Plate 50R, 50L Rolling roller 52 rail 54 loop wire 56 spring 58LU, 58LD guide roller 58RU, 58RD guide roller 60 S-shaped loop portion 62R, 62L reversing roller

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B23K 26/16

Claims (6)

[Scope of utility model registration request] 1. In a dust collecting device such as a laser or plasma processing machine equipped with a processing torch that is capable of plane movement on a work table, it is movable in conjunction with a torch carriage to which the torch is attached. A suction hood having a suction port facing the torch and an exhaust port connected to a dust collector is also arranged, and a water tank portion is formed directly below the torch in the hood to prevent spatter generated during processing from the water tank. A dust collector for a processing machine, which is capable of performing primary dust collection at the section. 2. A dust collecting apparatus such as a laser or plasma processing machine equipped with a processing torch that is capable of plane movement on a work table, and is movable in association with a torch carriage to which the torch is attached. A suction hood having a suction port facing the torch and an exhaust port connected to a dust collector is arranged, and a pretreatment filter for dust gas is arranged in the hood on the way to the suction port and the exhaust port. A dust collector for a processing machine, which is characterized in that 3. A dust collecting apparatus such as a laser or plasma processing machine equipped with a processing torch that is planarly movable on a work table, and is movable in association with a torch carriage to which the torch is attached. A suction hood having a suction port facing the torch and an exhaust port connected to the dust collector is arranged, and the bottom of the hood facing the torch is opened to face the work table floor, and the opening is Is a dust collector for a processing machine, characterized in that brush means is provided between the work table and the floor. 4. In a dust collecting device such as a laser or plasma processing machine equipped with a processing torch installed so as to be planarly movable on a work table, the dust collection device is movable in association with a torch carriage to which the torch is attached. A suction hood having a suction port facing the torch and an exhaust port connected to the dust collector is arranged, and a water tank portion is provided below the suction port of the hood to move above the water tank portion along the torch carriage. A dust collector for a processing machine, which accommodates a cylindrical body that is movable in synchronization with the torch, and has a suction port facing the torch and an exhaust port opening in the suction hood. . 5. In a dust collecting device such as a laser or plasma processing machine equipped with a processing torch installed so as to be planarly movable on a work table, it can be moved in conjunction with a torch carriage to which the torch is attached. A suction hood having a suction port facing the torch and an exhaust port connected to the dust collector is arranged, and the suction port of the hood is movable in synchronization with the torch moving along the torch carriage. A tubular body is provided, and a suction port that faces the torch and an exhaust port that opens into the suction hood are formed in the tubular body. The torch synchronous movement mechanism of the tubular body includes a rail portion passed to the carriage and A wire hand that has a roller part that is rolled and attached to the cylindrical body, and that connects the torch and the cylindrical body in a loop to form an S-shaped loop in the cylindrical body part. A dust collector for a processing machine, comprising a step, and elastic expansion / contraction means provided at a connecting portion of the wire means with the torch. 6. The cylindrical body is faced with or immersed in a water tank formed in a suction hood.
Alternatively, the dust collector of the processing machine according to item 5.