JP2514023Y2 - Thermal cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a thermal cutting machine equipped with a device for removing dross attached to an unloading device used for thermal cutting a pipe-shaped material.

[Prior Art] When heat cutting a large-diameter pipe (hereinafter referred to as a work) with a laser beam, the work is chucked on a rotary chuck arranged on an XY table that is numerically controlled to form a shaft center of the work. Processing is performed with a laser processing device having a right angle beam axis. In this case, in order to block irradiation of the light beam penetrating the work on the opposite inner surface of the work and to prevent the dross from adhering to the inner surface of the work,
By forming a hole in the side surface of the shielding pipe (hereinafter referred to as a pipe) attached to the unloading device, disposing a heat sink inside the pipe so as to face the hole, and inserting the pipe into the work shaft core. Japanese Patent Laid-Open No. 53-89098 discloses a method of protecting the inner surface of a work and collecting dross from a hole on the side surface of a pipe by suction.
Has been proposed.

[Problems to be solved by the invention] However, in the method of the above-mentioned Japanese Patent Laid-Open No. 53-89098, when processing a small-diameter pipe, dross is seized on the heat sink and cannot be collected by suction, and is deposited. Since the holes on the side surface of the pipe may be blocked, the collection efficiency of the dross at the time of cutting becomes poor and there is a quality problem that the dross (deposit) protruding from the hole to the outer surface of the pipe damages the inner surface of the work. Also, if there is a recovery device that automatically takes out the cut work from the pipe with a robot hand, etc., the work is caught because the dross (deposit) is projected on the surface of the pipe and the work is difficult to collect. Next, it was a hindrance to automation. In order to prevent the above problems in advance, a person must regularly scrape off the deposits inside the pipe with a stick or the like, which requires man-hours for removing the deposits, resulting in an increase in cost.

The present invention was developed in view of the above problems, and automatically removes the deposit of dross that sticks to the inside of the pipe by cutting, thereby solving the quality problem caused by damage to the inside of the work and eliminating the deposit. The purpose is to reduce costs by eliminating the required man-hours.

[Means and Actions for Solving the Problems] A thermal cutting machine of the present invention is a chuck for rotating a chuck to rotate a workpiece, a beam for cutting the workpiece, and a beam inserted into the workpiece to insert the workpiece. An unloading device equipped with a recovery pipe for accumulating dross generated at the time of cutting with a beam, a rod-shaped removing means for removing dross accumulated in the recovery pipe by pushing it down in the recovery pipe, and this removing means And a control unit that drives and controls the removing unit at a constant frequency.

With the above configuration, the dross generated when the pipe-shaped work is heat-cut by laser light or the like is collected by the collection pipe attached to the unloading device,
After that, a reciprocating removal means is inserted into the recovery pipe at a constant frequency from the tip side of the recovery pipe, the dross accumulated inside the pipe is pierced, and the recovery device connected to the unloading device is used for recovery. ing.

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

(First Embodiment) FIG. 1 is a perspective view of a dross removing device provided in a thermal cutting machine showing a first embodiment of the present invention, and FIGS. 2 (a) and 2 (b).
Is a view in the direction of arrow B and a view in the direction of arrow C of FIG. 1, FIG. 3 is an explanatory view showing the application of the dross removing device, FIG. 4 is an explanatory view of a recovery pipe, and FIG. It is explanatory drawing of the state which is cutting the workpiece | work with a laser processing apparatus. FIG. 6 is an explanatory diagram showing a dross removal state. It should be noted that FIGS. 1 and 2A and 2B show a state in which the dross removing device is not performing the dross removing operation.

In FIG. 3, a chucking device 3 for chucking a small diameter pipe (hereinafter referred to as a work) 2 as a member to be processed is provided on the nozzle 1 side of a laser processing device (not shown).
The axis of the workpiece chucked by the chucking device 3 and the beam axis from the nozzle 1 are controlled to intersect at a right angle. Further, an unloading device 4 that can move back and forth is provided at a position facing the chucking device 3, and a dross removing device 5 is provided behind (to the left in the figure) the unloading device 4.
Are arranged.

The chucking device 3 is a rotary chuck 6 which is numerically controlled to be movable and rotatable in the direction of arrow XX '.
Has several claws 7 for the work chuck,
It has a mechanism (not shown) for automatically feeding the work 2 into the nail. The work 2 is rotary chuck 6 with each claw 7.
It is chucked by being protruded by a predetermined amount so as to be coaxial with the axis of the shaft, and is rotatable around this shaft together with the rotary chuck 6 and the claw 7.

The unloading device 4 is controlled by a drive device (not shown) so as to reciprocate between the chucking device 3 and the dross removing device 5 along the guide shaft 10 on the base 11 in the arrow YY 'direction. Has been done. The support base 12 that moves on the guide shaft 10 has a rotary portion 14 that rotates through 90 ° each via a receiving shaft 13 on the upper portion thereof. The rotary unit 14 is driven by a motor 15 having an index. Hollow support arms 16 and 16 are attached to both sides of the rotary portion 14,
A recovery pipe 18 inserted into the work 2 to be cut is connected to the end of each support arm. As shown in FIG. 4, holes 20 are formed in the side surface of the tip of the pipe 18 in correspondence with the position of the laser light emitted from the nozzle 1 of the laser processing machine. Note that the screws 22, 22 screwed to the rotary portion 14 are plugs for closing the mounting holes used when increasing the number of support arms. Reference numeral 23 is a lid that is removed when cleaning the recovery passage inside the rotary portion 14. Further, 24 is a communication pipe that connects the recovery pipe 18 and the recovery passage to a recovery device (not shown).

The dross removing device 5 is shown in FIGS. 1 and 2 (a).
As shown in (b), a pair of bearing boxes 31 and 31 are mounted at two upper and lower positions on the mounting base 30 so that their axes are parallel to each other. A cylinder 33 is mounted between the pair of bearing boxes 31, 31 in parallel with the bearing box via a seat 32. Further, shafts 34, 34 are inserted through the bearing boxes 31, respectively, and a stay 35 is provided at the end of each shaft 34, 34.
Are mounted vertically. The tip of the rod 36 of the cylinder 33 is connected to the stay 35 via a joint 37. A solid rod member (removal means) 40 inserted into the recovery pipe 18 is attached to the stay 35 by the shaft 34.
It is attached via a receiving member 41 so as to be attached in parallel with (see FIG. 2 (a)). Therefore, by the operation of the cylinder 33, the rod member 40 is moved to the unloading device 4 via the shaft 34 supported by each bearing box 31.
Reciprocating on the extension line of the axis of the recovery pipe 18.

Dross removal by the dross removing device having the above configuration is performed as follows.

In FIG. 5, the work 2 that is projected and chucked by a predetermined amount reaches the position of the nozzle 1 of the laser processing machine by the chucking device 3. Next, the unloading device 4 is driven (Y direction), and the recovery pipe 18 is inserted into the work 2 so as to be coaxial with the work axis. Then, the hole 1 of the recovery pipe 18 is positioned at the laser light irradiation position (beam axis position) of the nozzle 1. afterwards,
The work 2 is rotated by the chucking device 3 and irradiated with laser light to cut the work 2. The dross 44 generated at this time is collected from the holes 20 of the recovery pipe 18 and recovered by the recovery device via the communication pipe 24, and a part thereof is accumulated as the dross deposit 45 inside the recovery pipe 18. .

After cutting the work 2, the unloading device 4 retracts while holding the cut small piece work 46 in the recovery pipe 18 (Y direction), and the rotary portion 14 is rotated 90 ° by the motor 15 to vertically move the recovery pipe 18. Position it above and collect the recovery pipe 18
The smaller piece workpiece 46 is carried out. Then, it is further rotated by 90 ° so that the recovery pipe 18 on which the dross has accumulated faces the rod member 40 of the dross removing device 5.

Next, the cylinder 33 of the dross removing device 5 is driven to insert the rod member 40 into the recovery pipe 18. The first
In the state of FIGS. 2A and 2B, the origin of the cylinder 33 is set to the push-out position of the rod 36, so that the rod member 40 is in the normal retracted position. Therefore, when the series of operations described above is performed, the cylinder 33 performs a retracting operation, and the rod member 40 is inserted into the recovery pipe 18 in conjunction with each other,
The dross 45 accumulated in the pipe 18 is pushed down (6th
(Fig.) After a certain period of time, the cylinder 33 pushes out and returns to the origin. The dross that has been pushed down in the pipe is collected via the communication pipe 24.

In the above description, the dross is removed after cutting the work once. However, the present invention is not limited to this, and may be performed after cutting a predetermined number of times or after a predetermined time has passed, and may be performed at a predetermined frequency.

Therefore, since the dross cannot be recovered due to the accumulation of dross inside the recovery pipe, continuous and stable cutting can be performed.

In the above embodiment, the removing means is a solid rod member and the end face is flat. However, as shown in FIG.
A rod-shaped pipe 48 with an edge having an edge portion 47 at the tip can also be used.

When using this edged pipe 48 as a removal means,
When inserted in the recovery pipe 18, the force can be concentrated on the edge portion 47, and even if the dross is strongly burned and deposited in the pipe 18, it can be chipped off with a force smaller than that of the solid rod member. Will be able to.

(Second Embodiment) FIG. 8 is a side view of an essential part of the second embodiment, and FIG. 9 is an explanatory view of a removing means to be mounted. In addition, in the present embodiment, a configuration different from the configuration of the first embodiment will be described, and the same reference numerals will be used for the similar configurations and detailed description thereof will be omitted.

In the figure, a rod member 40 as a dross removing means is provided with an actuator 50 attached to a stay 35 and a joint member 51.
Is rotatably connected via. Also, the rod member 40 is
It is rotatably supported by a guide 53 provided on the lower side of the L-shaped attachment fitting 52 attached to the stay 35.
The guide 53 also regulates the deflection of the rod member 40.

As shown schematically in FIG. 9, the rod member 40 is formed by engraving and quenching moderately fine meshes 55 in a file-like pattern, as schematically shown in FIG.

According to the dross removing device having the above configuration, the first
In the dross removing step according to the embodiment, the rod member 40 is inserted into the recovery pipe 18 while being rotated by the actuator 50.

Therefore, according to the present embodiment, since the dross is removed while being crushed, even the dross that is extremely hard deposited can be removed.

In addition, in each of the above-mentioned embodiments, the explanation is made such that the support base of the unloading device advances and retreats in the YY ′ direction and the rotary part rotates 180 °, but the invention is not limited to this, and a workpiece chucking device and a dross removing device. If the dross removing device is arranged so as not to interfere with the unloader device, the rotary portion can be rotated by an appropriate angle corresponding to the removing means. Further, the design can be changed so that the support base is rotated in the horizontal position.

[Advantage of the Invention] According to the present invention, since the dross deposits generated during the thermal cutting of the pipe can be automatically removed, the quality problem due to the damage on the inner surface of the cut product can be solved and the cost reduction due to the unmanned operation Can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view of a dross removing device included in a thermal cutting machine according to a first embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are B direction and C in FIG. Directional view, third
FIG. 4 is an explanatory diagram showing the application of the dross removing device, FIG. 4 is an explanatory diagram of a recovery pipe, FIG. 5 is an explanatory diagram when cutting a workpiece, and FIG. 6 is an explanation of a dross removing state. FIGS. 7 and 8 are other examples of the removing means, FIG. 8 is a side view of an essential part of the second embodiment of the present invention, and FIG. 9 is an explanatory view of another example of the removing means. 2 ... Work, 3 ... Chucking device 4 ... Unloading device 5 ... Dross removing device, 18 ... Recovery pipe 31 ... Bearing box, 33 ... Cylinder 34 ... Shaft, 35 ... Stay 40 ... … Rod members (removal means) 44,45 …… Dross 48… Pipes (removal means)

Claims (1)

(57) [Scope of utility model registration request] 1. A rotary chuck that chucks and rotates a work, a beam that cuts the work, and a collection that inserts into the work and deposits dross generated when the work cuts the beam inside. A holding device to which a pipe is attached, rod-shaped removing means for removing dross accumulated in the recovery pipe by pushing it down in the recovery pipe, a drive device for reciprocating the removing means, and the removing means at a constant frequency. A thermal cutting machine, characterized by comprising: a control means for driving and controlling.