JP3630848B2 - Work pallet for laser processing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a work pallet for a laser beam machine.
[0002]
[Prior art]
In order to automate laser processing, a workpiece pallet with a workpiece mounted in this way on a pallet shelf installed in a position adjacent to the laser processing device is mounted on a workpiece pallet in advance. Conventionally, a method of storing a plurality of workpiece pallets, taking out a work pallet to which a work necessary for processing is attached from the pallet shelf and supplying the work pallet to the laser processing apparatus, and storing the finished work pallet in the pallet shelf is conventional. Has been implemented since.
[0003]
A conventional work pallet 100 used in the above-described method has four sides framed by a C-shaped steel 101, for example, as shown in FIGS. It is a one-piece frame structure that is welded in combination in a grid pattern with the top face. Note that wheels 107 are provided on both sides of the work pallet for facilitating loading and unloading the work pallet 100 into and from the pallet shelf.
[0004]
[Problems to be solved by the invention]
When the workpiece placed on the workpiece pallet is laser processed, the laser beam that has passed through the cut portion of the workpiece is irradiated to the framework structure, and the framework structure is thermally expanded to distort the workpiece pallet. There is a problem that the workpiece placed on the pallet cannot be cut or a cutting failure occurs.
[0005]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a workpiece for a laser beam machine in which the framework structure of the workpiece pallet is not thermally expanded by laser light in a workpiece framework having an integral framework structure. Is to provide a pallet.
[0006]
[Means for Solving the Problems]
As a means for solving the above-mentioned problem, the work pallet for a laser beam machine according to claim 1, wherein a beam member made of a square pipe is assembled in a lattice shape inside the work pallet outer frame with the ridge line of the square pipe upward. A plurality of roof-shaped shading covers that match the shape of the square pipe are detachably mounted on the intermediate frame via a spacer having a small diameter, The gist is that an air layer for heat insulation is formed between the light shielding cover and the intermediate frame, and wheels for facilitating transfer of the work pallet are provided on the work pallet outer frame .
[0007]
Therefore, when laser processing a workpiece placed on the intermediate frame of the work pallet, the laser beam that has passed through the cut part of the workpiece is irradiated to the light shielding cover and is not irradiated to the intermediate frame, so that the intermediate frame is thermally expanded. Thus, the entire work pallet is not distorted, and the work placed on the work pallet cannot be cut or does not cause a cutting failure. In addition, even if the temperature of the light shielding cover rises, almost no heat is transferred to the square pipe, which is a beam member, due to the heat insulating effect of the air layer between the light shielding cover and the intermediate frame. Furthermore, since the work pallet is provided with wheels, the work pallet can be easily stored in or taken out from the pallet shelf .
[0008]
The work pallet for a laser beam machine according to claim 2 is provided with an intermediate frame in which a beam member made of a square pipe is combined in a lattice shape with a ridge line of the square pipe upward, inside the work pallet outer frame, A light shielding cover supporting member that supports a roof-shaped light shielding cover that is integrally formed in accordance with the shape of the square pipe is provided on the outer frame of the work pallet, and the light shielding cover is detachably placed on the intermediate frame, The gist is that an air layer for heat insulation is formed between the light shielding cover and the intermediate frame, and wheels for facilitating transfer of the work pallet are provided on the work pallet outer frame .
[0009]
Therefore, in addition to the same function and effect as those of the first aspect, since the light shielding cover is integrally formed, it can be easily attached to and detached from the intermediate frame. However, considering the weight of the shading cover, it is suitable for a relatively small work pallet that is not difficult to attach and detach .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a work pallet for a laser beam machine according to the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG.
[0013]
Referring to FIG. 1 and FIG. 2, the main structure of the work pallet 1 is an outer frame 3 of the work pallet, an intermediate frame 5 provided inside the outer frame 3, and an upper part of the intermediate frame 5. It consists of a plurality of light shielding covers 7A and the like.
[0014]
The outer frame 3 of the work pallet has, for example, a structure in which C-shaped steel is welded in a rectangular frame. The intermediate frame 5 has a welded structure in which beam members 9 are combined in a lattice shape and welded. In addition, it is desirable to use a pipe member having a square cross section for the beam member 9 and to combine the ridge line 11 of the square pipe member upward.
[0015]
Immediately above the beam member 9 of the intermediate frame 5, the light shielding cover 7A for shielding the laser beam LB is placed via a spacer 13 provided on the back surface. The shape of the light shielding cover 7 </ b> A is formed in a roof shape according to the rectangular pipe used for the beam member 9. The spacer 13 is desirably as thin as possible in order to reduce heat conduction.
[0016]
Note that wheels 15 are provided on both side surfaces of the work pallet for facilitating the transfer of the work pallet 1.
[0017]
Referring to FIG. 3, according to the work pallet 1 configured as described above, when the work W placed on the work pallet 1 is laser processed by a laser processing machine (not shown), a laser processing head (illustrated) is shown. The light shielding cover 7A blocks the laser beam LB from (omitted). Even if the temperature of the light shielding cover 7A rises, almost no heat is transmitted to the beam member 9 due to the heat insulating effect of the air layer 17 between the light shielding cover 7A and the beam member 9. In addition, since the heat transfer to the beam member 9 through the spacer 13 is minute, it can be ignored.
[0018]
Therefore, the intermediate frame 5 composed of the beam member 9 does not thermally expand. That is, the work pallet 1 is not thermally deformed, and the work placed on the work pallet cannot be cut or does not cause a cutting failure.
[0019]
When laser processing is performed using the work pallet 1 described above, even when the light shielding cover 7A has a hole, the flow of the assist gas is dispersed by the air layer 17 as shown in FIG. It is possible to prevent the beam member 9 from being cut by being not sufficiently supplied to 9.
[0020]
FIG. 4 shows a second embodiment of the work pallet 1. Instead of the spacer 13, a screw hole is provided in the light shielding cover 7B, and a male screw 19 is screwed into the screw hole to attach the light shielding cover 7B. It is placed on the beam member 9.
[0021]
5 and 6 show a third embodiment of the work pallet 1, and the light shielding cover 7C is adapted to the arrangement of the beam members 9 of the intermediate frame 5 provided inside the outer frame 3 of the work pallet. Then, the cross-sectional members are combined in a lattice shape and integrally welded, and the light shielding cover 7C is mounted on the plurality of light shielding cover support members 21 provided around the outer frame 3 of the work pallet 1. It is what I put. The light shielding cover support member 21 is provided so that the light shielding cover 7C is supported at a position slightly above the beam member 9 made of a square pipe. Since the light shielding cover 7C is integrally formed, it is very easy to attach / detach the intermediate frame 5 to / from the beam member 9. However, considering the weight of the light shielding cover 7C, the light shielding cover 7C is suitable for a relatively small work pallet that is not difficult to attach and detach.
[0022]
【The invention's effect】
According to the invention of claim 1 or claim 2 , even if the work pallet is irradiated with laser light, the work pallet is not deformed by thermal expansion, so that the work placed on the work pallet becomes uncuttable, There will be no cutting defects. Furthermore, since the work pallet is provided with wheels, the work pallet can be easily stored in or taken out from the pallet shelf. According to the invention of claim 2, in a relatively small work pallet that is not difficult to attach and detach, since the light shielding cover is integrally formed, it is very easy to attach and detach to the intermediate frame .
[Brief description of the drawings]
FIG. 1 is a perspective view of a work pallet for a laser beam machine according to the present invention.
2 is a cross-sectional view taken along the line II-II in FIG. 1. FIG. 3 is an explanatory diagram of the action of the air layer when the light shielding cover of the work pallet is perforated by laser light.
FIG. 4 is a diagram showing a second embodiment of a work pallet.
FIG. 5 is a plan view of a part of the work pallet, showing a third embodiment of the work pallet;
6 shows a third embodiment of the work pallet, and is a partial front view of FIG. 5. FIG.
FIG. 7 is a plan view of a conventional work pallet.
8 is a front view of the conventional work pallet shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Work pallet 3 Outer frame 5 Intermediate frame 7 Light shielding cover 9 Beam member 11 Edge line 13 Spacer 15 Wheel 17 Air layer 21 Light shielding cover support member

Claims (2)

Provided on the inner side of the work pallet outer frame is an intermediate frame in which beam members made of square pipes are combined in a lattice shape with the ridges of the square pipes facing upward, and a plurality of shapes are formed on the intermediate frame to match the shape of the square pipes. A roof-shaped light-shielding cover is detachably mounted between the square pipe via a small-diameter spacer, an air layer for heat insulation is formed between the light-shielding cover and the intermediate frame, and the workpiece A work pallet for a laser beam machine, wherein wheels for facilitating transfer of the work pallet are provided on a pallet outer frame . A roof shape in which a beam member made of a square pipe is combined inside the work pallet outer frame in a lattice shape with the ridgeline of the square pipe upward, and is configured integrally with the shape of the square pipe A light shielding cover support member for supporting the light shielding cover is provided on the outer frame of the work pallet, the light shielding cover is detachably mounted on the intermediate frame, and heat insulating air is provided between the light shielding cover and the intermediate frame. A work pallet for a laser beam machine, wherein a layer is formed, and a wheel for facilitating transfer of the work pallet is provided on the outer frame of the work pallet .

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