JP2514810Y2 - Processing head in laser processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to improvement of a processing head in a laser processing machine.

(Prior Art) Conventionally, a processing head in a laser processing machine is, for example,
The work placed on the work table is relatively moved in the X-axis, Y-axis, and Z-axis directions, and the work is subjected to predetermined heat cutting processing. The processing head generally performs processing while maintaining a slight amount of clearance (about 0.3 to 0.5 mm) from the upper surface of the work.

(Problems to be solved by the invention) By the way, when scraps generated during laser processing overlap with the work without falling off from the shooter or jump out onto the work top surface, they may collide with the processing head and damage the processing head. is there.

Therefore, in the conventional machining head, in order to minimize damage, a V-shaped groove is provided on the outer periphery of the pipe-shaped member in the middle of the machining head, and the V-groove serves as a fuse to apply an external force to the machining head. At that time, a means to break only the lower part of the processing head was taken. However, once broken, it takes a lot of time for replacement, manpower is required, productivity cannot be improved, and it is necessary to have spare parts, so that there is a problem that cost cannot be reduced.

The object of the present invention is to provide a laser processing machine which, in order to improve the above-mentioned problems, does not break the parts even if the processing head collides with scrap, protects the processing head, improves productivity and reduces cost. It is to provide a processing head.

(Means for Solving the Problem) In view of the conventional problems as described above, the present invention divides the processing head in the laser processing machine into an upper processing head as a fixed support portion and a lower processing head having an irradiation port. The upper processing head is provided with a suction member capable of integrally sucking the lower processing head and detaching the lower processing head from the upper processing head when an external force is applied. The positioning concave portion is provided, and the upper processing head is provided with a positioning convex portion that engages with the positioning concave portion.

(Operation) By adopting the processing head in the laser processing machine of the present invention, the upper and lower processing heads are integrated via the suction member, so that when an external force is applied to the lower processing head, suction of the adsorbent is performed. When the external force exceeds the force, the lower machining head is disengaged from the upper machining head. For this reason, since no excessive force is applied to the processing head, damage to the processing head is prevented.

When the lower processing head is integrated with the upper processing head again, the lower processing head is accurately positioned with respect to the upper processing head by engaging the V-shaped positioning recess and the positioning projection.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

As a laser processing machine, a laser processing dedicated machine, punch
There is a laser compound processing machine, but in this example punching
An example of a laser composite processing machine will be described.

Referring to FIG. 3, punch / laser combined processing machine 1
Is composed of a punching machine 3 and a laser processing apparatus 5 provided near the punching machine 3.

The punching machine 3 is composed of a rectangular frame 7, and an upper frame 9 of the frame 7 has a hydraulic cylinder 11 vertically provided with a striker. Further, an upper turret 15 is rotatably supported on a shaft 13 provided on the upper frame 9, and a lower turret 21 is rotatably supported on a shaft 19 provided on a lower frame 17 of the frame 7. A plurality of punches 23 are provided on the circumference of the upper turret 15, and the punches 23 are provided on the circumference of the lower turret 21.
The die 25 is mounted at a position corresponding to.

With the above configuration, the upper turret 15 and the lower turret 21 can be rotated in synchronization with each other. Hydraulic cylinder 11 with a striker suspended from the upper frame 9
Is operated to strike the punch 23 provided on the upper turret 15 and cooperate with the die 25 provided on the lower turret 21 to perform a desired punching process on the work W.

The laser processing device 5 includes a laser beam 27 on the side of the frame 7 of the punching machine 3 (on the right side in FIG. 3).
Is provided with a laser oscillator 29. The laser processing head holding arm 31 is horizontally extended from the laser oscillator 29 in the upper frame 9 of the frame 7 without contacting the frame 9, and the laser processing head 33 is vertically provided from the tip of the laser processing head holding arm 31. Has been done.

A nozzle 35 is provided below the laser processing head 33,
A reflecting mirror 37 that bends the laser beam 27 is provided in the laser processing head holding arm 31.

With the above configuration, the laser beam 27 oscillated by the laser oscillator 29 is bent by the reflecting mirror 37, and the workpiece W is irradiated with the assist gas from the nozzle 35 of the laser processing head 3 to perform laser cutting processing.

On the other hand, the work positioning device 39 for gripping and positioning the work W is provided with a fixed table 41 and left and right movable tables guided on horizontal guide rails (not shown) on the left and right sides of the fixed table 41. A carriage base 43 is straddlingly connected to the movable table.

Although not shown, the carriage base 43 is provided with a nut member 45 driven by an electric motor or the like, and a first lead screw 47 screwed to the nut member 45 is provided below the upper frame 9. By driving the electric motor, the carriage base 43 is moved in the front-rear direction (left-right direction in FIG. 3) and positioned. Although not shown, a second lead screw 49 driven by an electric motor or the like extends in the left-right direction (direction orthogonal to the drawing in FIG. 3) on the carriage base 43, and the carriage 51 is screwed. is there. A plurality of clamp devices 53 are arranged on the carriage 51.

With the above configuration, the work W is once held by the plurality of clamping devices 53, and the carriage base 43 is numerically controlled to a desired punching position or laser processing position.
Alternatively, the work W is moved and positioned by controlling the position of the clamp device 53.

Next, the laser processing head 33, which is the main part of this embodiment, will be described in more detail.

Referring to FIGS. 1 and 2, a laser processing head
The reference numeral 33 is vertically attached to the tip of the laser processing head holding arm 31 by being fastened by a bolt 55 or the like.

The laser processing head 33 is composed of an upper processing head 33a as a fixed support, a lower processing head 33b having an irradiation opening, and a suction member 57. The upper processing head 33a has a cylindrical shape and supports the suction member 57 at its lower end. The case 59 and the flange portion 63 of the positioning member 61 for positioning the lower processing head 33b, which will be described later, are overlapped and coupled with each other by bolts 65 and the like.

The positioning member 61 has a cylindrical body 67 on the lower surface of the flange 63.
And a locking member 69 is embedded in a plurality of places on the lower surface of the cylindrical body 67. As shown in detail in FIG. 2, the locking member 69 has a case 73 in which a steel ball 71 as a positioning convex portion is provided at a tip end thereof so as to be retractable, and is embedded in the cylindrical body 67.
In order to always urge the 71 in the protruding direction, a case 75 such as a spring is built in the case 73. Further, a detecting member 77 such as a limit switch is provided on the side surface of the cylindrical body 67 of the positioning member 61.

The attracting member 57 is, for example, a ring-shaped magnet, is mounted in the case 59, and can be attracted and detached between the lower surface of the attracting member 57 and a magnet base 79 provided in a lower processing head 33b described later. Has become.

The lower processing head 33b is vertically connected to the magnet base 79 by a bolt 81 or the like, and a nozzle 35 is provided at the lower end of the cylindrical lower processing head 33b. The magnet base 79 is provided with a V-shaped conical hole 83 as a V-shaped positioning recess into which the steel ball 71 of the locking member 69 is fitted in a proper position for positioning, and a detection portion (not shown) of the detection member 77.
Are provided so as to come into contact with and separate from the upper surface of the magnet base 79.

In the above configuration, the upper processing head 33a and the lower processing head 33b are integrally connected by the magnet that is the attraction member 57, and the workpiece W is cut by the laser beam 27 and the injection of the assist gas.

At this time, scraps and the like generated by the processing are not dropped from the shooter and overlap the work W, or when the work W or the processing head 33 is moved in a state of jumping to the upper surface of the work W, the work W or the processing head 33 is provided on the lower processing head 33b. It collides with the nozzle 35. Then, when a force to break the processing head 33 is generated, and this force becomes equal to or greater than the attraction force of the magnet that is the attraction member 57, the magnet base 79 supporting the lower processing head 33b is separated from the attraction member 57 and the lower processing head.
33b drops, and the limit switch, which is the detection member 77, operates to stop the laser processing apparatus 5.

When reassembling, attach the steel ball 71 of the locking member 69 to the magnet base.
Positioning is performed by matching with the conical hole 83 provided in 79, and the magnet that is the attraction member 57 is operated to integrate the upper and lower processing heads 33a and 33b.

As described above, when an external force equal to or greater than the set suction force of the suction member 57 is applied to the lower processing head 33b, the lower processing head 33b comes off the upper processing head 33a, so that the processing head 33 is protected without damaging the member. can do.
Thus, it is possible to save labor and time for exchanging the damaged parts, eliminate the need for preparing spare parts, and improve productivity and reduce cost.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. For example, in the present embodiment, an example in which a magnet is used as the attraction member has been described, but a pneumatically operated attraction pad type may be used, and a limit switch may be used as the detection member, but a proximity switch or the like may be used.

[Effects of the Invention] As can be understood from the above description of the embodiments, in short, the present invention relates to a processing head in a laser processing machine,
The upper processing head serving as a fixed support portion and the lower processing head having an irradiation port are separately provided, and the lower processing head can be integrally attracted to the upper processing head, and the lower processing head is moved from the upper processing head when an external force acts. A removable suction member is provided, V-shaped positioning recesses are provided at a plurality of locations on the lower processing head, and positioning projections that engage with the positioning recesses are provided on the upper processing head.

As is apparent from the above configuration, in the present invention, the machining head is divided into an upper machining head and a lower machining head, and the upper and lower machining heads are integrally suction-coupled via a suction member. The connection by suction of the suction member,
Since the connection is such that the upper and lower processing heads are separated from each other when an external force is applied, the lower processing head is separated from the upper processing head when an external force is applied, and damage to the processing head can be prevented. .

Further, since V-shaped positioning recesses are provided at a plurality of locations on the lower processing head, and positioning projections that engage with the positioning recesses are provided on the upper processing head, the lower processing head is lower than the upper processing head. When the two are integrally adsorbed and coupled, the lower machining head is accurately centered and positioned with respect to the upper machining head by the engagement between the V-shaped positioning concave portion and the positioning convex portion. Is a good one.

Therefore, if the lower processing head is separated from the upper processing head and then the lower processing head is again attracted and connected to the upper processing head, it will be connected in the same state as before the separation, and the lower processing head will be centered and positioned. There is no need to do it again.

[Brief description of drawings]

FIG. 1 shows the main part of the present invention. FIG. 3 is an enlarged view of an arrow I in FIG. 3, FIG. 2 is an enlarged view of an arrow II in FIG. 1, and FIG. It is a side view of the punch laser complex processing machine of an Example. 1 ... Punch / laser combined processing machine, 5 ... Laser processing device 33 ... Laser processing head, 33a ... Upper processing head 33b ... Lower processing head, 57 ... Adsorption member

Claims (1)

(57) [Scope of utility model registration request] 1. A processing head (33) in a laser processing machine.
Is divided into an upper processing head (33a) as a fixed support portion and a lower processing head (33b) having an irradiation opening,
The lower processing head (33b) can be integrally attracted to the upper processing head (33a) and the upper processing head (33
A suction member (57) capable of detaching the lower processing head (33b) from a) is provided, and V-shaped positioning recesses (83) are provided at a plurality of locations on the lower processing head, and the positioning recesses (83) are provided on the upper processing head. Positioning protrusions (71) that engage with
A processing head in a laser processing machine, characterized by comprising: