KR101122444B1 - Focus lense member for laser beam machining apparatus - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a focus lens member for a laser processing machine, wherein the focus lens member can be simply assembled through a slide insertion at one side of the laser output head, so that a spot point is accurately formed at the center point of the laser light. It is done.

Laser processing apparatus according to the present invention for achieving this object, a frame having a dust collector built therein, a laser oscillation device for generating a laser, a work shelf formed to position the workpiece, and a laser beam to the workpiece In the laser processing machine provided with a laser output head for outputting, the laser output head includes a slide-type focus lens member is assembled so that the spot point of the laser light is formed exactly at the center point in the nozzle body to which the output nozzle is coupled It is characterized by.

Laser, processing machine, output head, output nozzle, focus lens

Description

FOCUS LENSE MEMBER FOR LASER BEAM MACHINING APPARATUS}

The present invention relates to a focus lens member for a laser processing machine, and more particularly, it is possible to easily assemble the focus lens member through slide insertion at one side of the laser output head, so that the spot point at the center point of the laser light is accurately A focus lens member for a laser processing machine to be formed.

In general, as shown in FIGS. 1 to 3, a laser processing machine includes a frame 110 having a dust collector built therein, a laser oscillator 120 generating a laser, and a laser generated by the laser oscillator 120. Optical means comprising a plurality of optical lenses for guiding and focusing the beam to the machining position, the work shelf 10 on which the object is to be positioned, the cover 130 installed on the top of the frame 110 to be opened and closed, and laser machining. The unit 200 is included.

As illustrated in FIGS. 2 to 5, the laser processing unit 200 includes a plurality of optical lenses 201 and 202 for guiding and focusing a laser beam generated by the laser oscillation apparatus 120 to a processing position and A laser output head 210 for outputting a laser beam transmitted through the optical lenses 201 and 202 is provided.

The laser output head 210 is moved in the left-right direction (X-axis direction in FIG. 3) by the X-axis feeder 220, and the X-axis feeder 220 is Y-axis feeder 230 disposed on both left and right sides thereof. ) To move in the front-rear direction (Y-axis direction in FIG. 3).

The X-axis transfer unit 220, the driving belt 221 is fixed to the laser output head 210 on one side, guides the movement of the laser output head 210 to move in the left and right directions by the driving belt 221. The X-axis feed rail 222, a pair of moving frame 223 fixed to both ends of the left and right of the X-axis feed rail 222.

In addition, as shown in FIGS. 4 and 5, the driving belt 221 is driven by a driving motor (not shown) installed in the moving frame 223, and the laser output head is disposed on one side of the driving belt 221. The fixing bracket 218 of 210 is fixed.

Accordingly, the laser output head 210 is moved straight in the horizontal direction as the driving belt 221 is driven by a drive motor (not shown).

In addition, the laser output head 210 is precisely guided by the X-axis transfer rail 222 to move straight. The X-axis conveying rail 222 has a "c" shaped cross section with a groove, and the driving belt 221 is concealed in the groove of the X-axis conveying rail 222 so that various foreign matters are prevented from entering the driving belt 221. Is installed as a structure.

The pair of moving frames 223 move in the front-rear direction (Y-axis direction) by the Y-axis feeder 230 disposed on both left and right sides of the X-axis feeder 220. In addition, an optical lens 202 is fixed to an upper portion of one of the moving frames 223.

The Y-axis transfer unit 230 is a pair for guiding the movement of each moving frame 223 moving in the front-rear direction (Y-axis direction) by a pair of drive belts 232 driven by the drive motor 231. It includes a guide rod 233.

The pair of drive belts 232 are driven by the drive motor 231, and each moving frame 223 is fixed to one side of each drive belt 232, and according to the driving of the drive belts 232. The pair of moving frames 223 move forward and backward.

On the other hand, the laser output head 210, the head body 211, a pair of guide rollers 212 installed on the rear of the head body 211, the head body 211 as shown in Figure 4 to 6 To detect and measure a reflecting mirror 213 installed in the nozzle body 211b of the nozzle, an output nozzle 214 for outputting the laser beam reflected by the reflecting mirror 213 to the workpiece w, a machining range of the workpiece, and a machining height. The sensing unit 215 is included.

The rear of the head body 211 has a wire receiving portion 216 for accommodating a variety of control wires, the lower portion of the wire receiving portion 216 to prevent sagging to the lower working shelf 10 The wire holder 217 is installed.

Meanwhile, as illustrated in FIGS. 3 to 6, the X-axis guide rail 222 is made of aluminum, and the X-axis guide rail 222 has a hard anodizing coating layer (on the outer surface including the guide protrusion 224). 225) to maintain hardness, corrosion resistance, wear resistance, insulation and the like.

In addition, the output nozzle 214 of the laser output head 210 is a nozzle hole for outputting the laser beam reflected by the reflector 213 on the workpiece (w) on the nozzle body (211b) to the workpiece (w) side. 214a, and an air supply hose 214b for supplying air is connected to the side of the output nozzle 214.

This output nozzle 214 is coupled to the nozzle body 211b through the threaded portion (S). When the output nozzle 214 is coupled, the focus lens member FL is interposed between the output nozzles 214 so that a spot of the laser comb is formed.

Accordingly, the output nozzle 214 has a locking jaw 4 formed therein, the focus lens member FL is interposed on the assembly, and is placed on the O-ring 6.

In addition, the sensing unit 215, as shown in Figures 4 to 6, the lower end of the contact body 215a in contact with the workpiece (w), the elastic body 215b for elastically supporting the contact body 215a, And a contact switch 215c in contact with the top of the contact 215a.

The sensing unit 215 is a contact switch 215c when the upper end of the contact 215a does not contact the contact 215d while the lower end of the contact 215a is in direct contact with the workpiece w. ) Is off. In addition, the sensing unit 215, the contact switch 215c is turned on when the upper end of the contact 215a contacts the contact 215d.

Such a laser processing machine generates combustion gases, odors, etc. according to combustion as the object is processed by a laser beam, and the combustion gases, odors, etc. are filtered by a dust collector, not shown in the frame 110. It is discharged to the outside.

On the other hand, such a laser processing machine, when irradiating a laser on the surface of the object (W), it is very important to accurately form a laser focus (focus). That is, the diameter SP of the spot point irradiated to the surface of the object to be processed W should be as small as 0.1 to 0.3 mm.

In order to realize the optimum diameter SP of the spot, the focus lens member FL, which is assembled to the output nozzle 214, must be assembled to be positioned on a horizontal posture and a center line, as shown in FIG. do. Accordingly, the center point with respect to the spot point of the laser light passing through the focus lens member FL is formed on the center line.

However, since the coupling of the output nozzle 214 to the nozzle body 211b is coupled by using the screw portion S, either side of the focus lens member FL is pressed first due to the mismatch of the threads, and thus the assembly of the output nozzle 214 is performed in a horizontal position. There is a problem.

As a result, the focus lens member FL is assembled to one side on the center line, as shown in FIG. 7B and FIG. 7C, so that laser light is refracted and the spot point is changed. do.

When the focus lens member FL is assembled after cleaning and removing the output nozzle 214 from the nozzle body 211b once or twice a week when the workpiece is automatically measured and manipulated. As shown in (c), there is a problem that problems that are out of position occur.

As described above, the misassembly of the focus lens member FL is inconvenient to recalibrate the mechanical deviation by changing the center point with respect to the spot point.

The present invention has been proposed to solve the above problems of the prior art, and an object of the present invention is to be able to assemble the focus lens member through a slide insertion method in one side of the laser output head.

Another object of the present invention is to make the spot of the laser light formed at the center point.

Still another object of the present invention is to enable insertion and withdrawal of the focus lens member to the output nozzle by simply adopting a slide method.

It is still another object of the present invention to integrate components of the nozzle body and the output nozzle in the laser output head by applying the focus lens member, thereby reducing components.

Laser processing machine of the present invention for achieving this object, a frame having a dust collector built therein, a laser oscillation device for generating a laser, a work shelf formed to position the workpiece, and outputs the laser beam to the workpiece In the laser processing machine provided with a laser output head, the laser output head is characterized in that the slide-type focus lens member is assembled so that the spot of the laser light is formed exactly at the center point inside the nozzle body to which the output nozzle is coupled. .

The nozzle body has an insertion hole formed to have a rectangular size into which the focus lens member can be inserted, a support jaw formed so that the focus lens member slides along the inner circumferential surface from the insertion hole, and the front and side surfaces of the support jaw are assembled. Characterized in that it comprises an assembly protrusion formed to feel.

The focus lens member includes a slide plate formed to a predetermined thickness, an assembly groove formed on the front and side surfaces of the slide plate, a lens insertion hole formed to penetrate through a predetermined size in the center of one side of the slide plate, and the lens. It is characterized in that it comprises a focus lens which is airtightly assembled using a rubber pad and an O-ring in the insertion hole.

The lens insertion hole may include an insertion hole formed to have a size into which the focus lens can be inserted, a support hole protruding to catch the focus lens inserted through the insertion hole, and an enlarged upper and lower hole than the insertion hole. It characterized in that it comprises a lens fixing groove.

According to the present invention, as the assembly of the focus lens member to the nozzle body by applying the side-sliding method there is an effect that the assembly is made simply.

In addition, by assembling and using the focus lens on the slide plate, the focus lens can be easily handled and can be cleaned and assembled.

In addition, by assembling the focus lens on the slide plate to configure the focus lens member, insertion and withdrawal of the nozzle body into and out of the insertion hole is simply performed in a sliding manner, so that the assembly work for the laser output head is easy.

In addition, the assembly of the focus lens member to the laser output head has an effect that there is no inconvenience to readjust the mechanical deviation as the spot point of the focus lens is reassembled correctly.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

4 to 6, the conventional laser output head 210, the head body 211, a pair of guide rollers 212 installed on the rear of the head body 211, the head body 211 To detect and measure a reflecting mirror 213 installed in the nozzle body 211b of the nozzle, an output nozzle 214 for outputting the laser beam reflected by the reflecting mirror 213 to the workpiece w, a machining range of the workpiece, and a machining height. The sensing unit 215 is included.

Since the above general structure has been described in the related art, duplicated description will be omitted.

Next, features of the laser output head 210 according to the present invention will be described in detail with reference to FIG.

In the laser output head 210 according to the present invention, as shown in FIG. 8, the spot point SP of the laser light is formed at the center point exactly inside the nozzle body 211b to which the output nozzle 214 is coupled. A sliding focus lens member (FL) is assembled.

The nozzle body 211b has an insertion hole 12 having a rectangular size into which the focus lens member FL can be inserted. In addition, the support body 14 is formed in the nozzle body 211b so that the focus lens member FL slides along the inner circumferential surface of the insertion hole 12. In addition, the support projections 14 are provided with assembly protrusions 16a and 16b on the front and side walls so as to feel the completion of the assembly.

The support jaw 14 is formed over the inner circumferential surface of the nozzle body 211b, so that the focus lens member FL can be firmly inserted.

The assembling protrusions 16a and 16b allow the focus lens member FL to be inserted to be correctly assembled at the correct position. The assembling protrusions 16a and 16b are preferably formed of domed protrusions to facilitate insertion and withdrawal of the focus lens member FL.

The focus lens member FL includes a slide plate 18 having a predetermined thickness, as shown in FIGS. 8 to 10. The slide plate 18 is formed of an insertion portion 18b in which the lens L is assembled and a handle portion 18a exposed to the outside of the insertion opening 12. The handle portion 18a may be formed in various forms as shown in (a) and (b) of FIG. 10, and is not limited to any one form.

The focus lens member FL may be applied to the laser output head 210 to reduce the number of parts by manufacturing the output nozzle 214 and the nozzle body 211b as a single body.

In the focus lens member FL, assembly grooves 19a and 19b are formed on the front and side surfaces of the slide plate 18. The assembling grooves 19a and 19b are formed at positions that can be assembled with the assembling protrusions 16a and 16b. In addition, the assembling grooves 19a and 19b are preferably formed to a depth that can be freely separated and coupled to the assembling protrusions 16a and 16b.

In addition, since the assembling grooves 19a and 19b are formed at positions where they can be assembled with the assembling protrusions 16a and 16b, the focus lens member FL is inserted through the insertion hole 12 of the nozzle body 211b. When inserted, the lens L causes the spot spot SP of the laser light to be automatically positioned at the center point.

As shown in FIGS. 10 to 12, the focus lens member FL has a lens insertion hole 20 penetrating a predetermined size in the center of the insertion portion 18b. In the lens insertion hole 20, an insertion hole 20a is formed at one side to a size into which the lens L may be inserted.

The lens insertion hole 20 is provided with a support hole 20b so that the lens L inserted through the insertion hole 20a is caught by the lens insertion hole 20. That is, the lens L is easily inserted through the insertion hole 20a, and is accurately seated through the support hole 20b. The lens L is not limited to one form, but may be formed in a concave or convex form, and may be variously changed as necessary.

In addition, the lens insertion hole 20 is formed with a lens fixing groove 20c which is enlarged than the insertion hole 20a so that the assembly of the lens L is firmly formed between the insertion hole 20a and the support hole 20b. have.

In addition, when assembling the lens (L) to the lens insertion hole 20, the rubber pad 23 and the O-ring 22 is interposed above and below so that it can be airtightly assembled without play. The O-ring 22 described above is assembled using the lens fixing groove 20c so that the lens L does not move.

The focus lens member FL is provided with a lens L that is airtightly assembled to the lens insertion hole 20 by using a rubber pad 23 and an O-ring 22. The lens L is preferably of a type such that the spot point SP of the laser light is formed at the center point.

Hereinafter, the effect | action of this invention made as mentioned above is demonstrated.

First, the nozzle body 211b and the output nozzle 214 constituting the laser output head 210 of the laser processing machine may be manufactured in one piece and in a separate type for convenience of production. An insertion hole 12 into which the focus lens member FL is to be inserted is formed in any one of the nozzle body 211b and the output nozzle 21. The focus lens member FL is configured to form a spot point SP of the laser light at the center point.

The focus lens member FL is formed to facilitate insertion and withdrawal from the insertion hole 12.

Looking at the assembly of the focus lens member FL, the rubber pad 23 is first interposed in the support hole 20b in the lens insertion hole 20 formed in the insertion portion 18b of the slider plate 18. At this time, the lens L, which has been cleaned through the insertion hole 20a, is assembled to be in close contact with the rubber pad 23 of the support hole 20b.

Then, the assembly of the lens L is finished by inserting the lens L into the lens fixing groove 20c using the O-ring 22 so as to be fixed.

As described above, the focus lens member FL, in which the cleaned lens L is assembled, is held by the handle portion 18a at the insertion hole 12 of the laser output head 210 and the insertion portion 18b is pushed. Put it in.

The focus lens member FL slides and supports the base jaw 14 through the insertion hole 12. At this time, the assembling grooves 19a and 19b formed in the insertion portion 18b of the slide plate 18 are coupled with the assembling protrusions 16a and 16b formed around the support jaw 14.

The combination of the assembling grooves 19a and 19b and the assembling protrusions 16a and 16b allows the focus lens member FL to be firmly coupled to the laser output head 210. Thereby, since the position of the lens L does not change, it is not necessary to adjust the mechanical deviation again.

The laser output head 210 to which the focus lens member FL is coupled may perform precision work because there is no flow of the spot formed at the center point of the laser light even if the laser output head 210 is moved along the XY axis by the operation of the laser processing machine. It becomes possible.

1 is a perspective view showing a laser processing machine according to an embodiment of the present invention.

Figure 2 is an exploded perspective view showing a laser processing machine according to an embodiment of the present invention.

3 is a plan view showing a laser processing unit of the laser processing machine according to the present invention;

4 is a front view seen from the arrow A direction in FIG.

FIG. 5 is a side view seen from the arrow C direction of FIG. 4; FIG.

FIG. 6 is a partial cross-sectional view schematically showing the laser output head shown in FIG. 4. FIG.

FIG. 7 is a view showing a state of assembling and misassembly of the lens shown in FIG. 6; FIG.

8 is a view showing a focus lens member according to an embodiment of the present invention.

FIG. 9 is a cross-sectional view of the insertion hole shown in FIG. 8;

Fig. 10 is a plan view showing an embodiment (a) and (b) of the focus lens member shown in Fig. 8;

FIG. 11 is a side sectional view showing the focus lens member shown in FIG. 10; FIG.

FIG. 12 is an exploded view showing the focus lens member shown in FIG. 11; FIG.

<Brief description of symbols for the main parts of the drawings>

FL: Focus Lens member 211b: nozzle body

12: insertion hole 14: base jaw

16a, 16b: Assembling protrusion 18: Slide plate

19a, 19b: Assembly groove 20: Lens insertion hole

22: O-ring 20a: insertion hole

20b: support hole 20c: lens fixing groove

Claims (4)

Frame 110 having a dust collector built therein, a laser oscillator 120 for generating a laser, a working shelf 10 formed to position a workpiece, and a laser output head for outputting a laser beam to the workpiece In the laser processing machine provided with (210), The laser output head 210 includes a slide-type focus lens member FL assembled so that the spot point SP of the laser light is exactly formed at the center point within the nozzle body 211b to which the output nozzle 214 is coupled. Focus lens member for a laser processing machine comprising a. The method of claim 1, The nozzle body 211b has an insertion hole 12 formed in a rectangular size into which the focus lens member FL can be inserted, and a support formed so that the focus lens member FL slides along the inner circumferential surface from the insertion hole 12. A focus lens member for a laser processing machine, comprising a jaw (14) and an assembling protrusion (16a) (16b) formed on the front and side surfaces on which the support jaw (14) is formed. The method of claim 1, The focus lens member FL may include a slide plate 18 having a predetermined thickness; Assembly grooves (19a) (19b) formed on the front and side surfaces of the slide plate (18); An insertion hole 20a having a size into which the lens L is inserted into one side of the slide plate 18, a support hole 20b formed to catch the lens L, and an enlarged upper and lower portions than the insertion hole 20a. A lens insertion hole 20 formed by a lens fixing groove 20c formed between the holes; And a lens (L) hermetically assembled with a rubber pad (23) and an O-ring (22) in the lens insertion hole (20). The method of claim 1, The laser output head 210 is a focus lens member for a laser processing machine, characterized in that the application of the focus lens member (FL) can integrate the nozzle body (211b) and the output nozzle (214) into a single body.

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