JPH0214876Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the nozzle head of a laser processing machine, and improves workability in inspecting or replacing the nozzle part and lens part by making it possible to easily attach and detach the nozzle part from the head holder. be.

The head section of a laser processing machine is broadly divided into a head holder, a lens holder, a condensing lens, a nozzle holder, and a nozzle.
Conventionally, the head holder and the nozzle holder have been connected by screws or bolts, and some kind of tool must be used to attach and detach the nozzle holder.

By the way, the nozzle part is installed closest to the workpiece, and is frequently inspected and replaced because it is frequently damaged by flying spatter when cutting or drilling the workpiece. Furthermore, since the condenser lens is an important part that directly affects processing accuracy, it is inevitably inspected frequently.

As in the past, when the nozzle part had to be attached and detached using some kind of tool, it was difficult to operate the nozzle part or the lens part when inspecting or replacing it, and it required a lot of work time.

The purpose of this invention is to solve the above-mentioned inconveniences and to improve workability in inspecting and replacing the nozzle part and lens part by making it possible to easily attach and detach the nozzle part from the head holder.

An embodiment of this invention will be described below.

An example of a laser processing machine 1 is shown in FIG. A laser beam generated from the laser generator 3 passes through an extensible guide path 5 provided in the left-right direction (X direction) in the figure, is bent vertically downward by a reflecting mirror 7, and reaches a nozzle head 9. The nozzle head 9 is movable in the X direction by a screw 13 rotated by a motor M along a rail 11 extending in the X direction.
In addition, the plate material W is oriented in the direction perpendicular to the plane of the paper (Y
It is gripped by a clamper 17 running on a rail 15 extending in the Y direction and is movable in the Y direction. A plate material W that is movable in the Y direction can be processed into a desired two-dimensional shape using the nozzle head 9 that is movable in the X direction.

FIG. 2 shows an enlarged front view of the nozzle head 9. Figure 3 is a sectional view taken along the - arrow in Figure 2;
The figure is a sectional view taken along the - arrow in FIG. 3, and FIG. 5 is a sectional view taken along the - arrow in FIG.

The nozzle head 9 is attached below the head attachment part 19 with bolts 21. The head holder 23 of the nozzle head 9 has a cooling water inlet port WI and an outlet port.
Inlet port GI for WO and assist gas such as oxygen
A pressure gauge Me for the assist gas is also provided.
As shown in FIG. 4, a cylindrical lens holder 26 holding a condensing lens Le is removably screwed onto the lower part of the cylindrical lens holder 25. As shown in FIG. The lens holder 25 is housed inside the head holder 23 so as to be vertically adjustable. That is, a key groove is cut above the lens holder 25, and the lens holder 25 can be adjusted and moved up and down along a key 27 provided on the head holder 23 side. This adjustment movement is performed by lens holder 2.
Attach the head holder 23 to the screw 29 provided on the outer periphery of the head holder 23.
The inner screw of the rotating member 31 provided with the optical axis aligned is screwed together, and a pin is inserted into the hole 35 provided in the rotating member 31 through the window 33 of the head holder 23 (see Figure 2) and rotated. conduct. Note that the rotating member 3
The rotation amount of 1, that is, the lens position can be monitored from the window 33. Furthermore, the rotation is finely controlled by a click stop mechanism by providing a plurality of equally spaced shallow holes 37 on the upper surface of the rotating member 31 as shown in FIG. It allows for precise rotation in small amounts.

As is clear from FIG. 4, the lens holder 26 is provided facing near the lower end of the head holder 23, and can be easily inspected and removed by removing a nozzle holder 47, which will be described later, from the head holder 23. It is something. Further, as shown in FIG. 4, the nozzle section is composed of a nozzle 41, a nozzle chip 43, a nozzle mount 45, a nozzle holder 47, a presser plate 49, and an optical axis adjuster. The nozzle mount 45 is fixed to the nozzle holder 47 with a bolt 51 via a presser plate 49.
The center axis of the nozzle tip 43 can be adjusted in the horizontal direction using an optical axis adjustment screw 53. The details of the optical axis adjuster are shown in the notch in Fig. 3. Note that the sensor S attached to the nozzle 41 shown in FIG.
It measures the distance between the nozzle tip 43 and the plate material, and is used for appropriate automation.

Figure 5 shows the head holder 23 and nozzle holder 47.
The details of the joint with the The nozzle holder 47 is provided with three equally arranged claws 55, 55, and a gap 57 corresponding to the claws 55 is provided on the head holder 23 side.
A pawl holding portion is provided which engages when the pawl 55 is rotated in the direction of arrow A. Also, head holder 2
A locking pin 59 is provided on the nozzle holder 4.
The final rotational position of 7 is regulated. Further, the head holder 23 is provided with a fixture for fixing the nozzle holder 47. The fixing device includes a fixing pin 61,
It consists of a ball plunger 63 that brings the tip ball portion into contact with a groove provided in the fixing pin at a position where the fixing pin 61 is engaged with a pin hole provided in the pawl 55.

The nozzle head 9 having the above structure is extremely easy to attach and detach from the head holder. That is, while pulling the fixing pin 61 with one hand, pull the nozzle 4 with the other hand.
1 in the opposite direction of arrow A in FIG. 5 and pull it out downward. In Fig. 4, nozzle 4
It will be understood that if 1 is removed, the condenser lens Le can also be inspected. When attaching the nozzle section to the head holder 23, it is of course possible to perform the operation in the opposite direction, but the claw 55
If a tapered surface is provided at the advancing front end of the fixing pin 61, and a spring (not shown) is provided to apply force to the fixing pin 61 in the engaging direction (direction toward the center in FIG. 5), the fixing pin 6
It is possible to engage without operating 1. Note that by using the optical axis adjustment screw 53, before attaching the nozzle section to the head holder 23,
Or later, the optical axis and the nozzle axis can be accurately aligned.

The nozzle head 9 according to the embodiment described above has the effect that the nozzle portion can be attached and detached very easily, and the attachment and detachment operation, which conventionally took a considerable amount of time using some kind of tool, can be done in a few seconds. Furthermore, as is clear from the description of the configuration in the above embodiment, the lens section can be inspected with the nozzle section removed, making inspection and replacement of the nozzle section and lens section easy. In addition, since the structure does not connect the cooling water inlet and outlet ports or the assist gas inlet port to the nozzle part, the strength requirements of the nozzle part can be lowered, so the nozzle part is made of light aluminum alloy, etc. It can be manufactured.

As can be understood from the above description of the embodiments, the present invention is such that a cylindrical lens holder 25 is provided in the head holder 23 of the nozzle head 9 in a laser processing machine so as to be movable up and down, and the lower end of the lens holder 25 is A lens holder 26 holding a condensing lens Le is removably attached to the lens holder 26, and the lens holder 26 is provided facing near the lower end of the head holder 23. An annular nozzle holder 47, which is provided with a locking part formed in a shape of 1 and a locking part that can be freely engaged and detached, is detachably installed, and the center of the nozzle 41 supported by this nozzle holder 47 is aligned with the optical axis of the laser beam. It can be adjusted freely to suit.

As is clear from the above structure, in the present invention, the lower end of the cylindrical lens holder 25, which is vertically movable in the head holder 23 of the nozzle head 9 in the laser processing machine, is provided with a lens holder holding the condensing lens Le. The body 26 is detachably attached, and the lens holder 26 is attached to the head holder 23.
It is facing near the lower end of. Therefore, the nozzle holder 47 detachably attached to the lower end of the head holder 23 is attached to the head holder 23.
By removing the lens holder 26 from the lens holder 25, the lens holder 26 can be easily attached to and detached from the lens holder 25. In other words, the condensing lens Le can be easily inspected and removed and replaced.

Further, the attachment and detachment of the nozzle holder 47 to and from the head holder 23 is carried out by engaging and disengaging the locked portion provided on the nozzle holder 47 with respect to the locking portion formed on the head holder 23, so that it can be done in one-touch operation. It can be quickly attached and detached.

Furthermore, since the nozzle 41 supported by the nozzle holder 47 is adjustable so that its center is aligned with the optical axis of the laser beam, for example, the jet axis of the assist gas and the optical axis coincide with each other, resulting in a good It is capable of laser processing.

[Brief explanation of the drawing]

The drawings all show examples, and FIG. 1 is a side view showing an example of a laser processing machine, FIG. 2 is a front view showing an enlarged view of the nozzle head, and FIG. 3 is a cross-sectional view taken along the - arrow in FIG. 4 is a sectional view taken along the - arrow in FIG. 3, and FIG. 5 is a sectional view taken along the - arrow in FIG. 2. 1... Laser processing machine, 9... Nozzle head,
23... Head holder, 25... Lens holder,
31...Rotating member, 33...Window, 41...Nozzle, 45...Nozzle mount, 55...Claw, 57
...Gap, A...Engagement direction, WI...Cooling water inlet port, WO...Cooling water outlet port, GI...Assist gas inlet port, W...Plate material.

Claims (1)

[Scope of utility model registration request] A cylindrical lens holder 25 is provided in a head holder 23 of a nozzle head 9 in a laser processing machine so as to be movable up and down, and a lens holder 26 holding a condensing lens Le is attached to the lower end of this lens holder 25.
At the same time, this lens holder 26 is provided facing near the lower end of the head holder 23, and the lens holder 26 is provided at the lower end of the head holder 23.
An annular nozzle holder 47 having a locking part formed on the head holder 23 and a removably locked part is removably attached, and the center of the nozzle 41 supported by this nozzle holder 47 is set to the laser beam. A nozzle head for a laser processing machine, characterized in that the nozzle head is adjustable to align with the optical axis.