JP2519242B2 - Dust collector for thermal cutting equipment - 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 collector in a thermal cutting apparatus.

(Prior Art) For example, laser light is a non-metallic material because of its excellent properties.
It is widely used for drilling metal such as cemented carbide and stainless steel, and cutting metal and ceramics.

In the case of cutting the above-mentioned metals, the laser beam irradiation portion is blown with an assist gas such as oxygen,
Many cutting and processing devices are used to improve the processing efficiency by blowing out molten metal.

A hole cutting and a cutting process, for example, in a laser beam machine as a thermal cutting machine uses a material removing function based on melting and evaporation of a work by a laser beam, and gas and dust are generated. In a laser beam machine such as a light moving type, the gas and dust are generally collected in a dust collecting chamber provided under the work table and kept at a negative pressure, and are passed from a blower to the atmosphere via a duct, a filter, or the like. Has been discharged.

(Problems to be Solved by the Invention) By the way, in the conventional laser beam machine of the light moving type or the like, the opening of the dust collecting chamber provided below the work table should be wide according to the moving range of the machining head. Because of this, and because it effectively sucked in gas and dust, a large-capacity exhaust fan had to be installed.

Therefore, during work, suction is performed from unnecessary portions and wasteful discharge is performed.

The object of the present invention is to reduce the suction amount from an unnecessary portion which is not cut in order to improve the above problems, and can easily and surely collect dust and the like to enhance the dust collecting effect. Another object of the present invention is to provide a dust collector for a thermal cutting device.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention collects dust or the like generated by the thermal cutting process at a lower portion of a work table in the thermal cutting device. A dust device is provided, and an appropriate number of dust collecting pipes are provided in the dust collecting device, and a plurality of spiral holes for sucking dust and the like are provided in the lower part of the dust collecting pipe along the longitudinal direction of the dust collecting pipe. The dust collecting device in the thermal cutting processing device is configured by being provided at appropriate intervals.

(Operation) By adopting the dust collector of the present invention, when dust or the like generated by the thermal cutting process falls from the work table, a plurality of dust collecting pipes provided in the lower portion of the dust collecting pipe provided in the dust collector are provided. Dust or the like is easily and surely sucked into the dust collecting tube through the spiral hole of the. Thus, the dust collecting effect is enhanced as compared with the conventional one.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to the drawings.

Referring to FIGS. 1, 2, and 3, a work table 5 for mounting a work W is provided on a base 3 of a laser processing machine 1 as a thermal cutting processing device. Guide guides 9 for guiding the gate-shaped X-axis carriage 7 on both left and right sides in FIG. 3 of the base 3.
Are provided so as to extend in the left-right direction (hereinafter referred to as the X-axis direction) in FIGS. 1 and 2. That is, the X-axis carriage 7 is moved in the X-axis direction by being guided by the guide guide 9 by a drive device (not shown). A telescopic cover 11 is provided above the right guide guide 9 in FIG.
Is provided.

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 carriage 15 which is movable in the Y-axis direction is supported on the upper frame 13. As shown in FIG. 2, the upper frame 13 is provided with, for example, two guide rails 17 extending in parallel in the vertical direction. Between the guide rails 17, a motor 19 attached to the X-axis carriage 7 is provided. A rotatable ball screw 21 is provided in parallel with the guide rail 17. A nut member (not shown) is screwed onto the ball screw 21, and the Y-axis carriage 15 is attached to the nut member.

Therefore, when the motor 19 is driven, the ball screw 21 is rotated, and the Y-axis carriage 15 is rotated through the nut member.
Are moved in the Y-axis direction.

The Y-axis carriage 15 is provided with a machining head 23. The machining head 23 is guided by a guide guide (not shown) attached to the Y-axis carriage 15, and is driven by a drive unit (not shown) in FIGS. 1 and 3. It is moved in the vertical direction (hereinafter referred to as the Z-axis direction).

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

In the laser oscillating device 27, a laser beam LB composed of, for example, a mixed gas of He, N ₂ and CO ₂ is oscillated, and a nozzle provided at the tip of the processing head 23 along the path as shown in FIGS. From 31, the work W placed on the work table 5 is applied with an assist gas such as oxygen and subjected to a predetermined cutting process.

When the desired processing is applied to the work W, the processing head 23 is moved in the X-axis, Y-axis and Z-axis directions for processing.

The concrete structure of the work table 5 is shown in FIGS. 4 and 5. In FIGS. 4 and 5,
The main body of the work table 5 is a support frame 33A, 33B having two long sides and a support frame 35A, 35B having two short sides.
It consists of a framework. Its support frame 33A
A plurality of work support bars 37 are supported on and 33B at appropriate intervals. Each work support bar 37 is provided with a plurality of support pins 39 at appropriate intervals in the vertical direction in FIG. 5, and the work W to be machined is placed and processed on the plurality of support pins 39. It is like this.

A support frame 41 supported by the support frames 33A and 33B is attached to the support frames 33A and 33B at approximately the center in the longitudinal direction. Its support frame 41
The plurality of support pins 39 are provided above the support pins 39 at appropriate intervals in the vertical direction in FIG.

In the vicinity of the support frames 33A, 33B in the support frame 41, the support blocks 43A, 43B are
It is supported by multiple pins as if sandwiched between. Rotatable rods 45A, 45B are supported in the lower portions of the support blocks 43A, 43B, and the rods 45A, 45B are supported in the lower portions of the support frames 35A, 35B as shown in FIG.

On the rods 45A and 45B, a plurality of box-shaped support frames 47 extending in the vertical direction in FIG. 5 and swinging at appropriate intervals in the horizontal direction are swingably supported. On each of the support frames 47, a plurality of free bearing devices 49 as rotatable supports that support the work W when the work W is transferred are provided at appropriate intervals in the vertical direction in FIG. .

Thus, when the work W is cut and processed, the work W is supported by the plurality of support pins 39, and when the work W is transferred before or after the cut W, a plurality of free bearing devices 49 are provided. Swings and projects above the support pin 39, and the work W is supported by the plurality of free bearing devices 49.

In the lower part of the support frame 33B, for example, a hollow prismatic duct 51 extending in the left-right direction in FIG. 5 is provided. On the side wall of the duct 51, for example, on the lower side in FIG. 5, a suction pipe 53, which is a plurality of dust collecting pipes extending in the vertical direction, is attached to the bracket 55 at appropriate intervals in the horizontal direction.
It is cantilevered through.

A damper 57 is provided at a connecting portion between the side wall of the duct 51 and each suction cylinder 53, and the damper 57 can be opened and closed by, for example, a rotary solenoid or a mechanical mechanism. Each damper 57 is a limit switch,
It is designed to be opened by confirming that the suction cylinder 53 works with a dog or the like. By opening and closing the damper 57, each suction cylinder
53 is communicated with or cut off from the duct 51.

The lower end of the suction cylinder 53 in FIG. 5 has a conical shape, and dust or the like generated during cutting is sucked from the tip and a plurality of holes provided in the lower portion of the suction cylinder 53. It has become.

Thus, the work W is placed in the dust collecting chamber corresponding to the processing head 23.
Dust, etc., generated during the cutting process of the
The air is sent to the duct 51 with the open 57, and is discharged to the outside by an air blower (not shown). The dust collecting chamber to which the processing head 23 does not correspond is shut off by the damper 57.

At the bottom of the support frames 33A and 33B, the suction cylinders 5 are provided.
A dust collection chamber 59 having an inverted quadrangular pyramid shape surrounding 3 is attached. The dust collection chamber 59 is divided into a plurality of partitions for each suction cylinder 53 by a plurality of partition plates 61, and the bottom surface of the dust collection chamber 59 is open.

In the lower part of the dust collection chamber 59, a plurality of, for example, two transport vehicles 63 for storing the slag and discharging it to the outside are arranged. In each of the carriages 63, a plurality of partition plates 65 having the same width as the partition plate 61 in the dust collection chamber 59 are provided and partitioned,
The top surface is open. It should be noted that in the state in which the carrier 63 is arranged in the lower part of the dust collection chamber 59, the partition plate 65 is
Will be almost matched with.

Therefore, the slag generated during the cutting process of the work W drops from the work table 5, passes through each dust collection chamber partitioned by the partition plate 61 of the dust collection chamber 59, and is partitioned by the partition plate 65 in the carrier 63. Is stored in a room. When the slag is full in each of the transport vehicles 63, each of the transport vehicles 63 is carried outside and removed.

As shown in FIGS. 6 and 7, the specific structure of each of the suction cylinders 53 includes a cylindrical tube-shaped tip portion 53A, a cylindrical body portion 53B, and a ring-shaped collar rear portion 53C. Has become. The rear portion 53C is attached to the duct 51 with, for example, bolts. Moreover, the fifth portion is provided at the rear portion 53C.
As shown in the figure, a damper 57 that can be opened and closed is provided.

In the longitudinal direction FIG. 6 of the body portion 53B, a plurality of spiral holes 67 are formed at appropriate intervals in the left-right direction in the lower portion from the axial center portion in the left-right direction. The holes 67 are formed more densely, for example, as they approach the tip portion 53A. The pitch of the holes 67 and the opening area of the holes 67 are appropriately determined depending on the dust collecting ability.

Thus, an air blower (not shown) is operated to draw air through the duct 51 from the plurality of spiral holes 67 and, if necessary, the holes at the tip. That is, in the body portion 53B, the wind caused by the air spirals around and is sucked into the body portion 53B.
Therefore, the workpiece W is heat-cut by the laser beam LB from the processing head 23 and the assist gas, but dust generated at that time falls around the suction cylinders 53 from above. The dust or the like that has fallen is sucked into the body portion 53C from the plurality of holes 67 by the spiral wind of the air, and is discharged to the outside by the blower via the duct 51.

Thus, by providing the spiral holes 67 at appropriate intervals in the longitudinal direction of the suction cylinders 53 in the lower portion of each suction cylinder 53,
In the suction cylinder 53, the wind from the suctioned air turns spirally,
Dust that has fallen around the outside of the suction cylinder 53 is not covered by the holes 67.
Is easily and surely sucked into the suction cylinder 53.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. In the above-described embodiment, it is desirable to provide a guide fin along the hole of the suction cylinder 53 in order to induce a more spiral wind.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, an appropriate number of dust collecting pipes are provided in the dust collecting device provided at the lower portion of the work table, and the dust collecting pipes are provided. Since a plurality of spiral holes for inhaling dust etc. are provided in the lower part of the dust pipe at appropriate intervals along the longitudinal direction of the dust collecting pipe, the dust generated by the thermal cutting process has a plurality of spirals. The dust is easily and reliably sucked into the dust collection tube through the hole. Therefore, it is possible to enhance the dust collecting effect as compared with the conventional one, and it is possible to use a small-sized exhaust fan.

[Brief description of drawings]

FIG. 1 is a front view of a laser processing machine as a thermal cutting apparatus 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. is there. FIG. 4 is a front view of a work table, which is the main part of this embodiment, and FIG. 5 is a plan view showing a partial cross section of FIG. FIG. 6 is a front view of a suction cylinder as a dust collecting pipe, and FIG.
It is the development view which expanded the figure. [Explanation of the symbols showing the main parts of the drawing] 1 ... Laser processing machine, 5 ... Work table 51 ... Duct, 53 ... Suction cylinder 57 ... Damper, 59 ... Dust collection chamber 61 ... Partition plate

Claims (2)

(57) [Claims] 1. A dust collector for collecting dust and the like generated by the heat cutting process is provided at a lower portion of a work table in the heat cutter, and an appropriate number of dust collecting pipes are provided in the dust collector. A dust collecting device in a thermal cutting apparatus, characterized in that a plurality of spiral holes for sucking dust and the like are provided in the lower part of the dust collecting pipe at appropriate intervals along the longitudinal direction of the dust collecting pipe. . 2. The thermal cutting process according to claim 1, wherein the dust collecting device comprises a plurality of dust collecting chambers, and a dust collecting pipe is provided in each of the dust collecting chambers. Dust collector in equipment.