JPS63268566A - Thermal cutting device - Google Patents

Abstract

PURPOSE:To reduce the suction amt. from unnecessary part and to increase dust collection effect by a fan of small capacity by providing a dust collecting pipe inside each dust collecting chamber at the lower part of a work table and connecting each dust collecting pipe to a duct freely in its communication and cutting off. CONSTITUTION:The dust generated at the cutting time of a work is sucked from the plural holes provided at the tip and lower part of a suction cylinder 53 in the dust collection chamber to which a work head corresponds, fed into a duct 51 in the state of a damper 57 being open and exhausted outside by a fan. Only the dust collecting pipe of the dust collecting chamber at which the work head is located thus works, the dust collection chamber is made smaller than in the past and the dust generated in thermal cutting can be collected by the dust collecting pipe as well.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention relates to a thermal cutting processing device, and more specifically, gA
The present invention relates to a thermal cutting device equipped with a 1σ tube.

(Prior art) For example, the sea 1F light has a small size, so it can be used for non-metal,
It is widely used for drilling holes in metals such as cemented carbide and stainless steel, as well as cutting various metals and ceramics.

In the case of cutting the metals mentioned above, for example, assist gas such as oxygen is blown onto the laser beam irradiation point to blow away the molten metal. ing.

BACKGROUND ART Arrow drilling and cutting in a laser beam machine, which is a thermal cutting device, utilizes a material removal function based on melting and evaporation of a workpiece by a laser beam, and is accompanied by the generation of gas and dust. In laser processing machines such as optical movement type, this gas J3 and dust are generally collected in a dust collection chamber located below the work table and maintained at zero pressure, and are discharged through a vacuum cleaner, filter, etc. Emitted into the atmosphere.

(Problems to be Solved by the Invention) By the way, in a conventional optical moving type laser processing machine, the opening of the dust collection chamber provided below the work table is
It must be wide enough to accommodate the movement range of the processing head.
In addition, a large exhaust fan had to be installed to effectively suck out gas and dust.

Therefore, during work, suction was performed from unnecessary parts, resulting in wasteful discharge.

The purpose of the present invention is to reduce the amount of suction from unnecessary parts that are not cut, and to provide a dust collection pipe with a good dust collection effect using a small-capacity exhaust fan, in order to improve problem 1. An object of the present invention is to provide a thermal cutting processing device.

[Structure 1 of the Invention (Means for Solving the Problems) In order to achieve the above object, the present invention provides an X-axis gear 1 ledge that is movable in the X-axis direction with respect to the work table, and a Equipped with processing head
A Y-axis gear ledge that is movable in the Y-axis direction perpendicular to the axial direction is provided, and a dust collection chamber extending in the Y-axis direction is installed in each dust collection chamber that is located below the work table and divided into multiple sections in the X-axis direction. A thermal cutting device was constructed by providing pipes and connecting each dust collecting pipe to a duct so that they could be freely communicated with and cut off from each other.

(Function) By adopting the thermal cutting processing device of the present invention, when thermal cutting processing is performed by moving the processing head, the dust collection pipe of the fourth collection chamber where the processing head is located operates to operate, and the processing The dust collection pipe in the dust collection chamber where the head is not located will not work. The opening of the dust collection chamber is smaller than before, so it is possible to create a small exhaust system! Aircraft a can achieve the east coast effect of efficiency J.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIGS. 1, 2, and 3, laser processing t! as a thermal cutting device is used. A work table 5 on which a work W is placed is provided on the base 3 at 11. On both left and right sides of the base 3 in FIG. 3, guide guides 9 for guiding the gate-shaped X-axis carriage 7 extend in the left-right direction (hereinafter referred to as the X-axis direction) in FIGS. 1 and 2. It is currently provided. That is, the X-axis carriage 7 is guided by the guide 9 and moved in the X-axis direction by a drive device (not shown). A telescopic type cover 11 is provided on the upper part of the guide 9 on the right side in FIG.

The upper frame 13 of the X-axis carriage 7 extends in the left-right direction (hereinafter referred to as the Y-axis direction) in FIG.
A Y-axis gear ledge 15 that is movable in the Y-axis direction is supported on the upper frame 13. In the upper frame 13,
As shown in Figure 2, for example, two
Wooden guide rails 17 are provided, and between the guide rails 17, a pole screw 21 rotatable by a motor 19 attached to the X-axis carriage 7 is provided parallel to the guide rails 17. A nut member (not shown) is screwed onto the pole screw 21, and the Y-axis gear ledge 15 is attached to the nut member.

Therefore, when the motor 19 is driven, the pole screw 21 is rotated, and the Y-axis gear ledge 15 is moved in the Y-axis direction via the nut member.

A machining head 23 is provided on the Y-axis gear ledge 15, and the machining head 23 is guided by a guide (not shown) attached to the Y-axis gear ledge 15, and is driven by a drive device (not shown) in FIGS. 1 and 3. Vertical direction (hereinafter referred to as Z
This is called the axial direction. ).

A box-shaped head 25 is provided near the left side of the base 3 in FIG. 1, and a laser oscillation device 27 for oscillating the laser beam LB is provided on the head 25. . An overhead beam 29 is attached to the front part of the laser oscillation device 27, and the overhead beam 29 is connected to the processing head 23.

In the laser oscillation device 27, for example, He, N2.

A radar beam 1B made of a mixed gas of CO2 is oscillated, and the processing head 23 follows a path as shown in FIGS. 1 and 2.
A nozzle 31 provided at the tip of the workpiece W is applied with an assist gas such as oxygen to the workpiece W placed on the worktable 5 to perform a predetermined cutting process.

Note that when performing desired processing on the workpiece W, the processing head 23 is moved in the X-axis, Y-axis, and Z-axis directions to perform the processing. 'The specific structure of the work table 5 is shown in FIGS. 4 and 5. Fourth
In the figure and FIG. 5, the main body of the work table 5 is 2
It is constructed of support frames 33A, 33B made up of long sides of wood and support frames 35Δ, 35B made up of two short sides. A plurality of workpiece support bars 37 are supported at appropriate intervals on the support frames 33A and 33B. Each of the workpiece support bars 37 is provided with a plurality of support bins 39 at appropriate intervals in the vertical direction in FIG. 5, and the workpieces W to be processed are placed on the plurality of support bins 39 and processed. It looks like this.

A support frame 41 supported by the support frames 33A and 33B is attached approximately at the center in the longitudinal direction of the support frames 33A and 33B. On the support frame 41, the plurality of support bins 39 are arranged at appropriate intervals in the vertical direction in FIG.

Support frames 33A, 3 in the support frame 41
In the vicinity of 3B, support blocks 43A and 43B are supported by a plurality of bins so as to sandwich the support frame 41. Support block 43A.

Inside the lower part of 43B are rotatable mouth rads 45A and 45B.
The rods 45A and 45B are supported at the bottom of the support frames 35A and 35B, as shown in FIG.

A plurality of box-shaped support frames 47 are swingably supported on the rods 45A and 458, extending in the vertical direction in FIG. 5 and at appropriate intervals in the left-right direction.

On each support frame 47, a plurality of free bearing devices 49 are provided at appropriate intervals in the vertical direction in FIG. 5 as rotatable supports that support the workpiece W when the workpiece W is transferred. .

Therefore, when cutting the workpiece W, the workpiece W is supported by the plurality of support bins 39, and the workpiece W is
When the workpiece W is transferred before or after cutting, the plurality of free bearing devices 49 swing and protrude above the support bin 39, and the plurality of free bearing devices 49 support the workpiece W.

A hollow prismatic duct 51, for example, extending in the left-right direction in FIG. 5 is provided at the lower part of the support frame 33 [3. On one side wall of the duct 51, for example, on the lower side in FIG. 5, suction cylinders 53, which are a plurality of dust collecting pipes extending vertically, are cantilevered through brackets 55 at appropriate intervals in the horizontal direction. There is.

A damper 57 is provided at the connection between the side wall of the duct 51 and each suction tube 53, and the damper 57 can be opened and closed by, for example, a rotary solenoid or a mechanical mechanism. Each damper 57 is controlled by a limit switch, dog, etc. to actuate the suction cylinder 53.
It is designed to open by pressing H. By opening and closing the damper 57, each suction cylinder 53 is communicated with or disconnected from the duct 51.

As shown in FIG. 5, the lower part of the tip of the suction tube 53 has a conical shape, so that dust generated during cutting can be sucked through the plurality of holes provided at the tip and the bottom of the suction tube 53. It has become.

Therefore, the workpiece W is placed in the dust collection chamber corresponding to the processing head 23.
Dust generated during the cutting process is sucked in through a plurality of holes provided at the tip and bottom of the suction cylinder 53, and is sent into the duct 51 with the damper 57 open, and is removed by the exhaust ff1i (not shown). It is blocked off.

At the lower part of the support frames 33A, 33B, a dust collection chamber 59, which surrounds each suction tube 53 and has a shape of, for example, an inverted quadrangular pyramid, is attached. The dust collection chamber 59 is partitioned into Fi numbers for each suction R53 by a plurality of partition plates 61, and the dust collection chamber 59
The bottom of 9 is open.

A plurality of transport vehicles 63, for example two, for storing the slag and discharging it to the outside are arranged in the lower part of the dust collection chamber 59. Inside each transport vehicle 63 is a partition plate 6 in the dust collection chamber 59.
1 and a plurality of partition plates 65 in between are provided to partition the space, and the top surface is open. Note that when the transport vehicle 63 is delivered to the lower part of the dust collection chamber 59, the partition plate 6
5 almost coincides with the partition plate 61.

Therefore, the slag generated during the cutting process of the workpiece W falls from the worktable 5 and is removed from the partition plate 61 of the dust collection chamber 59.
The dust passes through each of the dust collection chambers partitioned into two, and is stored in a room partitioned by a partition plate 65 in the transport vehicle 63. When each transport vehicle 63 is full of slag, each transport vehicle 63 is transported outside and removed.

As shown in FIGS. 6 and 7, the specific structure of each suction tube 53 consists of a conical tube-shaped tip portion 53A, a cylindrical body portion 53B, and a ring-shaped collar rear portion 53C. ing. The rear portion 53C is attached to the duct 51 with, for example, bolts. Moreover, the rear part 53C
As shown in FIG. 5, a damper 57 that can be opened and closed is provided.

A plurality of spiral-shaped holes 67 are bored at appropriate intervals in the left-right direction in the lower part of the shaft center in the left-right direction in FIG. 6 in the longitudinal direction of the body portion 53B. For example, the holes 67 are formed more densely as they approach the tip 53A. Note that the hole 1 of the hole 67 and the opening area of the hole 67 are determined as appropriate depending on the dust collection ability.

Then, a blower (not shown) is operated, and air is sucked in through the duct 51 through the plurality of spiral-shaped holes 67 and, if necessary, the hole at the tip. That is, inside the body part 53B, the wind of air turns spirally and is sucked into the body part 53B. Therefore, the laser beam L from the processing head 23
The workpiece W is thermally cut by B and assist gas, but the dust generated at that time flows into each suction cylinder 5 from above.
Fall around 3. The fallen dust and the like are sucked into the body portion 53C through the plurality of holes 67 by the spiral wind of the air, and are discharged to the outside by an exhaust fan via the duct 51.

In this way, by providing the spiral holes 67 at appropriate intervals in the longitudinal direction of each suction cylinder 53 in the lower part of each suction cylinder 53, the wind generated by the suction air rotates in a spiral shape within the suction cylinder 53. Dust that has fallen around the outside of the suction tube 53 is
It is easily and reliably sucked into the suction cylinder 53 through the hole 67.

Note that the present invention is not limited to the above-mentioned embodiments,
By making appropriate changes, other embodiments can be implemented. In the embodiment described above, it is desirable to provide guide fins or the like along the hole of the suction tube 53 in order to induce a more spiral wind.

[Effect of the Invention 1] As understood from the description of the embodiments above, according to the present invention, the collection of W71@ located below the work table and extending in the Y-axis direction g! In addition to installing the pipes at appropriate intervals in a dust collection room partitioned by multiple partition plates, each 1! The processing head is located because the dust pipe is connected to the duct so that communication can be cut off freely! Only the dust collection pipe in the dust room operates. As a result, the dust collection chamber is smaller than in the past, and the dust collection tube can collect dust generated during thermal cutting.

Therefore, an efficient dust collection effect can be obtained with a small-sized exhaust fan.

[Brief explanation of the drawing]

Fig. 1 is a front view of a laser processing device as a thermal cutting processing device which is an embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a right side view of Fig. 1. be. FIG. 4 is a front view of the work table which is the main part of this embodiment, and FIG. 5 is a plan view showing a partial cross section of FIG. 4. Figure 6 is a front view of the suction tube as a dust collection pipe, and Figure 7 is the
This is a developed view of the figure. [D2 code representing the main parts of the drawing] 1... Laser processing 1ff5... Work table 51... Duct 53... Suction tube 57... Damper 59.
...Dust collection room 61... Partition plate agent Patent attorney Yasuo Miyoshi 3rd cause

Claims (2)

[Claims] (1) An X that can move freely in the X-axis direction relative to the work table
A Y-axis carriage is provided, and the X-axis carriage is equipped with a processing head and is movable in the Y-axis direction perpendicular to the X-axis direction. A thermal cutting processing device characterized in that a dust collecting pipe extending in the Y-axis direction is provided in each dust collecting chamber, and each dust collecting pipe is connected to a duct so as to be freely communicated with and interrupted. (2) The thermal cutting processing apparatus according to claim 1, characterized in that a damper is provided between each of the dust collecting pipes and the duct and can be opened and closed according to the position of the processing head.