JPS637434Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser processing machine, and more particularly to a laser processing machine that can easily remove a workpiece cut out from a plate material by laser processing.

A typical laser processing machine with a fixed processing head is equipped with a material support table for supporting a plate, and a material transfer and positioning device for moving and positioning the plate back and forth, left and right. Further, a suction hole is provided below the processing head for absorbing assist gas and dust generated during laser processing.

When using a laser processing machine with the above configuration to cut out a plate material by laser processing, the gap between the workpiece cut off from the plate material and the plate material is extremely small, and the cutting process is performed by the suction action of the suction hole. Since the object tends to be sucked in, the workpiece tends to be inclined with respect to the plate material, and a galling phenomenon occurs between the cut hole in the plate material and the workpiece, making it difficult to remove the workpiece from the plate material. This is particularly noticeable when the plate material is thick.

Therefore, conventionally, at the stage where the workpiece is separated from the plate material, the workpiece is manually removed using a stone. Therefore,
Operators must monitor the laser processing machine,
There were problems with unmanned and fully automated systems.

The present invention was developed in view of the conventional problems as described above, and its purpose is to automatically and reliably remove workpieces cut from a plate, regardless of the thickness of the plate. The object of the present invention is to provide a laser processing machine with functions that can be obtained.

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

Referring to FIG. 1, in a laser processing machine 1, a laser beam oscillated by an oscillator section 3 having a built-in gas cooling adjustment device passes through a connection cover section 5 and is provided at the tip of a laser beam guide irradiation section 7. It is reflected vertically downward at the processing head. With respect to the irradiation optical axis axis 9 of the laser beam in this processing head, the laser beam is focused on a material (plate material) that has been transferred and positioned, for example, by a numerically controlled material transfer and positioning device 11, to form a desired shape. Perform cutting, etc. Further, slag, gas, etc. generated during processing are sucked and removed by a suction/discharge device 13. Incidentally, since this type of laser processing machine 1 is well known, a more detailed explanation will be omitted.

FIG. 2 is a plan view showing a part of the laser processing machine 1 in which an embodiment of the present invention is installed below the irradiation optical axis axis 9 in the processing head, and shows an adjacent plate material support table 15 ( (See Figure 1) is shown with the parts removed.

The rectangular lifting table 17 shown in the center of FIG. 2 is provided with suction holes 19 for sucking and discharging dissolved slag, gas, etc. at a position corresponding to the irradiation optical axis axis 9, and a large number of suction holes 19 are provided on the top surface. A ball bush 21 is provided. Further, in this embodiment, two sets of vibration generators 23, such as air vibrators, are provided on the lower surface of the lifting table 17.

More specifically, as can be understood from FIG. 3, the lifting table 17 is normally located at approximately the same height as the material supporting table 15, and is used when removing a workpiece separated from the material (plate material). , which is lowered to a position lower than the material support table 15, and is provided so as to be vertically movable. As is clear from FIGS. 3 and 4, the elevating table 15 has a double structure consisting of an upper table 17A and a lower table 17B. The upper table 17A is provided to be movable up and down with respect to the lower table 17B, and the ball bush 21 is attached to the lower table 17B so that the upper part protrudes from the upper table 17A, as can be understood from FIG. It is being Further, although detailed illustration is omitted, the vibration generator 23 is configured to operate the lower table 17A so as to generate vertical vibrations in the upper table 17A.
It is attached to B.

As can be understood from FIGS. 2 and 4, two guide posts 25 are fixed downwardly on the lower surface of the lower table 17B of the lifting table 17, and a base plate provided on the machine base 27 29,
Sleeve ball bushing 3 provided over 31
3 and can slide up and down.

Similar to the guide post 25 described above, a fluid pressure cylinder 35 (see FIG. 3), such as an air cylinder, is provided across the base plates 29 and 31, and the upper end of the piston rod 37 is connected to the lower surface of the lower table 17B of the lifting table 17. It is attached to.

As is clear from FIGS. 2 and 4, the upper end of a lower limit setting bolt 39 passing through the lower table 17B is attached to the lower surface of the upper table 17A of the lifting table 17, and a coil spring It is biased downward by an engine 41 like this. A butt bolt 43 is provided on the base plate 29 corresponding to each bolt 39 described above.

Base plate 29 on both left and right sides of FIG.
A bracket 4 is attached to the extrusion device board 45 provided above.
A slider 53 is provided with two guide bars 49 parallel to each other in the vertical direction in FIG. is provided.

An angle member 55 is attached to the slider 53 so as to face each other on the inside as shown in FIG. It is biased clockwise in FIG. 3 by a coil spring 63.

The oscillator 61 described above is an inverted triangular block as shown in FIG. A scraper bar 67 (see FIG. 2) is attached to connect the two, and a scraper 69 made of, for example, hard rubber is attached to the scraper bar 67.

The slider 53 described above is connected to the piston rod 71 of the fluid pressure cylinder 51 by a connecting member 73 on the outside of the guide bar 49, and the above-mentioned connecting member 73 is connected to the end of the movement range of the slider 53 on the extrusion device board 45 by a bracket 75. microswitches 77 and 79 that abut one outer end of member 73;
A plate cam 81 that comes into contact with the roller 65 of the rocker 61 described above is provided.

Furthermore, the lower table 1 in the lifting table 17
As shown in FIG. 3, an L-shaped bracket 83 is provided on the lower surface of 7B, and a dog member 8 is attached to the tip thereof.
5A and 85B are provided so as to be vertically adjustable and fixed, and micro switches 89 and 9 are mounted on a bracket 87 attached to a part of the base plate 29.
1 is provided to detect the lifting state of the lifting table 17 by coming into contact with the dog members 85A and 85B described above.

A manifold 93 for connecting fluid pressure piping is provided at the right end in FIG.

The apparatus of this embodiment described in detail above operates as follows.

In the above configuration, the elevating table 17
is held at approximately the same height position as the material support table 15, and laser processing is performed while moving the plate material in the front and back and left and right directions using the material transfer and positioning device 11.
When the workpiece is cut out from the plate material, the workpiece is placed on the lifting table 17. In the above state, when the vibration generator 23 is started and the lifting table 17 is lowered while vibrating, both the plate material and the workpiece are vibrated, so that there is a gap between the hole cut out of the workpiece from the plate material and the workpiece. Even if the galling phenomenon tends to occur in the plate, the galling phenomenon is eliminated by the vibration, so that the workpiece can be easily removed from the plate material.

The distance that the lifting table 17 descends while vibrating only needs to be a distance that allows the workpiece to completely come out from the cutout hole in the plate material, and is sufficient if it is slightly larger than the thickness of the plate to be processed. The distance that 17 descends while vibrating is approximately 10 mm. Note that the vibration generator 23 can be stopped as appropriate, such as by using a timer.

Lifting table 17 with the workpiece placed on it
When the bolt 39 comes into contact with the bolt 43, the upper table 17 of the elevating table 17
A will rise relative to the lower table 17B, and the ball bush 21 will be retracted from the upper table 17A. When the lifting table 17 is lowered to its lowest position and the dog member 85A operates the micro switch 89, the micro switch 8
In response to a lowering limit position arrival signal of the lifting table 17 from 9, the fluid pressure cylinder 51 is actuated to move the slider 53 upward in FIG.

The roller 65 supported by the slider 53 is controlled by the plate cam 81, and in FIG. 6
7 is brought close to the upper surface of the lifting table 17, and the scraper 69 attached to the scraper bar 67 is separated from the plate material and pushes the workpiece on the lifting table 17 upward in FIG. 2 (to the left in FIG. 3). It is discharged to the side of the laser processing machine 1.

The movement of the slider 53 for ejection is detected by the contact between the connecting member 73 and the micro switch 79, and the return stroke continues until the connecting member 73 contacts the micro switch 77, and then returns to the original position shown in FIG. It will return to .

As can be understood from the above description of the embodiments, the gist of the present invention is as stated in the claims for utility model registration. Elevating table 1 located at the lower position and movable up and down
7 is equipped with a vibration generator 23 for vibrating the lifting table 17 when the lifting table 17 is lowered. Further, the lifting table 17 can be raised and lowered to approximately the same height as the material support table 15 and to a position lower than the material support table 15.
7 is in the lowered state, the elevating table 17
A workpiece extrusion device is provided which includes a reciprocating scraper for laterally extruding the upper workpiece.

Therefore, in the present invention, the plate material is supported by the material support table 15 and the lifting table 17, and when the plate material is cut out by laser beam irradiation from the processing head, the material is not cut out from the plate material. The workpiece is then supported by the lifting table 17. Therefore, elevating table 17
When the workpiece is lowered, the workpiece is lifted up and down by the lifting table 17.
This means that it can be lowered while being placed on the board and removed from the board.

By the way, when a workpiece is cut out from a plate material by laser processing, the gap between the hole where the workpiece was cut out from the plate material and the workpiece is extremely small, and a galling phenomenon occurs, causing the workpiece to fall into the cutout hole of the plate material. It may get caught. Particularly when the plate material is relatively thick, even a slight inclination of the workpiece immediately causes a galling phenomenon, making it troublesome to remove the workpiece from the plate material.

However, in the present invention, the elevating table 1
Since the vibration generator 23 is attached to the lifting table 17, when the lifting table 17 is lowered, the lifting table 1
7 can be given vibration. Therefore, when the lifting table 17 is lowered to remove the workpiece from the plate material, the plate material and the workpiece are vibrated by lowering the lifting table 17 while vibrating. Even if a galling phenomenon occurs, it can be immediately canceled by vibration, so that the workpiece can be easily removed from the plate material.

After the elevating table 17 descends while vibrating and removes the workpiece from the plate material, the workpiece extrusion device is activated, and the workpiece on the elevating table 17 is pushed out to the side by the scraper, so that the workpiece is It can also be easily eliminated.

That is, according to the present invention, a workpiece separated from a plate material can be automatically removed without causing a galling phenomenon, and automation can be easily implemented.

Note that the present invention is not limited to the above-described embodiments, but can be implemented in other embodiments by making appropriate changes.

[Brief explanation of the drawing]

FIG. 1 is a side view of a laser processing machine shown as an example machine implementing the present invention, FIG.
The figure is a cross-sectional view taken along the - arrow in FIG. 2. DESCRIPTION OF SYMBOLS 1...Laser processing machine, 15...Material support table, 17...Elevating table, 23...Vibration generator, 69...Scraper.

Claims (1)

[Scope of utility model registration request] A laser processing machine is provided with a material transfer and positioning device 11 for moving and positioning a plate supported on a material support table 15, and a processing head for performing laser processing on the plate at a position above the material support table 15. , a lifting table 1 which can be raised and lowered and placed below the processing head.
7 is provided with an absorption hole 19 and the elevating table 17
A vibration generator 23 is attached and provided to generate vibrations in the lifting table 17 when the lifting table 17 is lowered, and the lifting table 17 is raised and lowered to a position approximately at the same height as the material supporting table 15 and a position lower than the material supporting table 15. The elevating table 17 can be freely provided.
A workpiece extrusion device comprising a reciprocably movable scraper for pushing out the workpiece on the lifting table 17 laterally when the lifting table 17 is in a descending state is arranged at a side position of the lifting table 17. A laser processing machine featuring: