JP2504464B2 - Work table in thermal cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to, for example, a work table in a thermal cutting apparatus.

(Prior Art) Conventionally, for example, a laser cutting machine as a thermal cutting machine is mainly of a three-axis optical movement type. Part 3
The work table that conveys the work to the processing station in the axial light moving type laser processing machine has a loading / unloading station for carrying in / out (carrying in / out) of the work and a processing station for performing heat cutting processing on the work independently. Those that reciprocate between are usually. Therefore, when a predetermined cutting process is completed on the work placed on the work table positioned at the processing station, the work table is returned to the transfer station and replaced with a new work.

(Problems to be Solved by the Invention) By the way, since the work table independently reciprocates between the transfer station and the processing station, the work should be carried in and out after heat cutting. However, there is a problem that it takes a long time to carry out a series of thermal cutting processes for many works.

[Structure of the Invention] (Means for Solving Problems) In order to solve the above-mentioned conventional problems, the present invention includes a first table and a second table, and the first table is used as a processing station. A first transfer drive device for transferring between the loading / unloading stations is provided, a movable table for supporting the second table so as to be able to move up and down is provided at a position below the first table, and the second table is processed at the position below the first table. In order to transfer between the station and the loading / unloading station, a second transfer drive device for moving the movable table is provided, and a cylinder for moving up and down the second table of the movable table is provided.

(Operation) With the above configuration, the first table is transferred from the loading / unloading station to the processing station by driving the first transfer driving device. In addition, by moving the movable table in one direction by driving the second transfer driving device, the second table can be transferred integrally with the movable table from the processing station to the loading / unloading station at a position below the first table. After transferring the first table to the processing station and the second table to the loading / unloading station, respectively, the cylinder is operated to raise the second table,
Lift to the designated height. Then, while performing a thermal cutting process on the work supported by the first table,
When the processed work is supported by the second table, the processed work is carried out from the second table,
Next, the work to be processed is carried into the second table. At this time, raising the second table is
Not necessarily.

After carrying out the thermal cutting process on the work supported on the first table and carrying the work on the second table,
The second table is lowered by the operation of the cylinder to be positioned at a lower position of the first table (a position lower than the lower side of the first table). Next, the first table is transferred from the processing station to the loading / unloading station by driving the first transfer driving device. In addition, by moving the movable table in the other direction by driving the second transfer driving device, the second table can be integrally transferred with the movable table from the loading / unloading station to the processing station at a position below the first table.

After the first table is transferred to the carry-in / out station and the second table is transferred to the processing station, the second table is lifted by the operation of the cylinder and lifted to a predetermined height position. Then, the work supported by the second table is subjected to the thermal cutting process, the processed work is carried out from the first table, and the work to be processed next is carried into the first table.

Further, when performing the maintenance of the work table on the side of the loading / unloading station, the first table is driven by the first transfer drive device while the second table is positioned below the first table by the operation of the cylinder. Is transferred to the processing station, and at the same time, the second table is transferred to the processing station integrally with the movable table by driving the second transfer driving device. As a result, the upper side of the work table on the loading / unloading station side can be opened.

When performing maintenance on the processing station side of the work table, the first and second transfer drive devices are driven to transfer the first and second tables to the loading / unloading station, and the upper side of the work table on the processing station side is opened. To the state

(Example) Hereinafter, the Example of this invention is described in detail based on drawing.

Referring to FIG. 1, a work table 5 for mounting a work W is provided on a base 3 of a laser processing machine 1 as a thermal cutting processing device. The base 3
A guide guide 9 for guiding the gate-shaped X-axis carriage 7 when viewed from the left in FIG. 1 is provided extending in the left-right direction (hereinafter referred to as the X-axis direction). .

That is, the X-axis carriage 7 is moved in the X-axis direction by being guided by the guide guide 9 by a drive device (not shown).
A telescopic cover 11 is provided behind the base 3.

On the upper part of the X-axis carriage 7, there is provided a Y-axis carriage 13 which is movable in a direction (hereinafter, referred to as Y-axis direction) orthogonal to the paper surface in FIG. Thus, the Y-axis carriage 13 is moved in the Y-axis direction with respect to the X-axis carriage 7 by a drive device (not shown).

Front part of Y-axis carriage 13
In the figure, a processing head 15 is provided which is movable in the vertical direction (hereinafter referred to as the Z-axis direction). Its processing head
A nozzle for irradiating the laser beam LB at the lower end of 15
17 is installed. Thus, the machining head 15 is moved in the Z-axis direction with respect to the Y-axis carriage 13, and the position between the work W and the nozzle 17 is adjusted.

A box-shaped bed 19 is arranged near the right side of the base 3, and a laser oscillator 21 for oscillating a laser beam LB is provided on the bed 19. An overhead beam 23 is attached to the front portion of the racer oscillating device 21, and a tip portion of the overhead beam 23 is connected to the processing head 15.

In the laser oscillating apparatus 21, for example H _e, N _2, CO laser beam LB consisting mixed gas of ₂ is oscillated, a nozzle 17 mounted on the tip portion of the machining head 15 follows a such paths shown by two-dot chain line Therefore, the work W placed on the work table 5 is applied with an assist gas such as oxygen and subjected to a predetermined heat cutting process.

When the desired processing is applied to the work W, the processing head 15 is moved in the X-axis, Y-axis and Z-axis directions for processing.

On the work table 5, there are respectively provided a plurality of processing work support bars 25 for supporting the work W when processing the work W and a work loading / unloading work support bar 27 for supporting the work W when loading / unloading the work W. Extends in the Y-axis direction and X
They are provided at appropriate intervals in the axial direction.

A work table 5 on which the work W is placed is provided on the base 3. More specifically, FIG.
As shown in FIGS. 3 and 4, the work table 5 can be inserted into and removed from the processing station S by a first table 5U, and the work table 5 can be inserted into and removed from the processing station S at a position below the first table 5U. It is composed of the second table 5D placed on the movable table 29. As shown in FIG. 4, support frames 31, 33 extending in the X-axis direction are integrated on both inner sides of the base 3, and the support frames 31, 33 are integrated.
Two guide rails 35A and 35 on both sides of 33
B; 37A and 37B are attached so as to extend in the X-axis direction.

A plurality of guide rollers 39 and 41 are rotatably supported on both outer sides of the first table 5U and the movable table 29, respectively. The plurality of guide rollers 39, 41 are connected to the guide rail 35.
A, 35B; 37A, 37B are mounted, and the first table 5U and the movable table 29 are independently guided in the X-axis direction through the guide rollers 39, 41 to the guide rails 35A, 35B; 37A, 37B. Are transported.

Since the second table 5D is placed on the movable table 29, the second table 5D is conveyed together with the movable table 29.

A first transfer driving device and a second transfer driving device for moving the first table 5U and the movable table 29 in the Y-axis direction are provided on the base 3. Since the respective transfer driving devices have substantially the same structure and are arranged above and below each other, the first transfer driving device of the first table 5U will be described.
With respect to the second transfer drive device of the movable table 29, the same parts are designated by the same reference numerals and detailed description thereof will be omitted.

The first transfer drive device of the first table 5U includes one drive source section 43 and three transmission sections 45, 47, 49 and the like. That is, in FIG. 2, the drive source portion 43 is located at the upper left corner on the base 3.
Are attached, and the transmission portions 45, 47, 49 are attached to the upper right corner, the lower right corner and the lower left corner on the base 3. The drive source unit 43 includes a drive motor 51, a drive sprocket 53, and the like. The transmission parts 45, 47 and 49 are respectively driven sprockets.
55,57,59 are installed.

The driven sprocket 55 of the transmission portion 45 and the driven sprocket 57 of the transmission portion 47 are connected by a connecting shaft 61 extending vertically in FIG. A chain 63 is wound around the drive sprocket 53 and the driven sprocket 55, and a chain 65 is wound around the driven sprocket 57 and the driven sprocket 59. Also, in FIG. 2 of the first table 5U, connecting portions 67A, 67B; 69A, 69B are attached to the upper and lower left and right end portions, respectively, and the connecting portions 67A, 67B; 69A, 69B are connected to the chain 63. , 65 are installed.

With the above configuration, when the drive motor 51 is driven, the chains 63, 65 wound between the drive sprocket 53 and the driven sprocket 55 and between the driven sprocket 57 and the driven sprocket 59 move in the same direction. Since the connecting portions 67A and 67B are attached to the chain 63 and the connecting portions 69A and 69B are attached to the chain 65, the first table 5U is moved in the left-right direction, that is, the Y-axis direction in FIG. In FIG. 2, the first table 5U is located at the left in the loading / unloading station H and the processing station S is located at the right. Therefore, the first table 5U is transferred between the carry-in / out station H and the processing station S.

The movable table 29 is also moved to the second table in the same manner as the first table 5U is transferred.
It is conveyed between the loading / unloading station H and the processing station S by the driving of the transfer driving device, and is moved to the movable table 29 and the first station.
For example, the table 5U and the table 5U are alternately taken in and out of the processing station S.

As shown in FIGS. 2 and 4, the movable base 29
A plurality of cylinders 71 are provided on the side wall of the. Further, in FIG. 2, a table guide 73 is attached to substantially the center of the left and right side walls of the second table 5D. A plurality of guide grooves 75 are formed in the movable table 29 at positions facing the table guide 73.

With the above configuration, the table guide 73 as shown in FIG.
Is mounted in the guide groove 75, and the movable table 29 is transferred to the processing station S and positioned,
By activating the cylinder 71, the second table
The 5D is lifted upward, positioned at a predetermined height, and subjected to a predetermined cutting process.

Thus, the first table 5U and the second table 5D are
For example, the loading / unloading station H and the processing station S are alternately loaded / unloaded. Since there is a space for placing the three-dimensional work W on the first table 5U, the three-dimensional work W is placed on the first table 5U and the first table 5U is transferred to the processing station S. Work W of three-dimensional object
A predetermined cutting process is performed on the.

Further, a flat plate-shaped work W is placed on the second table 5D placed on the movable base 29, and the movable base 29 is conveyed from the carry-in / out station H to the processing station S to be a predetermined flat work W. Is cut.

Therefore, the work W of the three-dimensional object is placed on the first table 5U.
However, a flat work W is placed on the second table 5D,
For example, the three-dimensional object and the flat plate-shaped work W can be efficiently cut by being alternately conveyed from the carry-in / out station H to the processing station S.

Each of the first table 5U and the second table 5D has a plurality of processing work support bars 25 and a loading / unloading work support bar 27 extending in the vertical direction (Y-axis direction) in FIG.
Are provided at appropriate intervals in the left-right direction (X-axis direction). A plurality of support pins 77 are erected on each work support bar 25, and a three-dimensional object or a flat work W is placed on the support pins 77 for cutting.

In addition, the second on the base 3 in the processing station S
In the drawing, a plurality of retracting clamps C are attached to the upper side, and an origin alignment pin P is provided on the upper right side in FIG. And the home position alignment pin P
The abutting work W can be positioned.

Further, a free bearing device 79 as a plurality of supports is erected on each of the carry-in / out work support bars 27,
The free bearing device 79 has, for example, a pair of loading / unloading work support bars 27 that are adjacent to each other so that the support pins 77 project from the plane supporting the work W when the work W is transported (loaded / unloaded). It is rotated. A drive device 81 for rotating the pair of loading / unloading work support bars 27 is shown in FIGS.
Shown in Figures and 7.

In FIGS. 5, 6, and 7, the first table
A support plate 83 is integrated with the outer end portion of 5U, and a pair of loading / unloading work support bars 27 are rotatably supported on both sides of the support plate 83 via brackets 85A and 85B. As shown in FIG. 7, the free bearing device 79 of the loading / unloading work support bar 27 is provided with a support column 79C which is erected on the loading / unloading work support bar 27 and a free rotatable member above the support column 79C. It consists of a bearing 79F.

At the tip portions of the pair of loading / unloading work support bars 27,
The pinions 87A and 87B are keyed with the keys 89A and 89B and fixed with a set screw or the like. The pinion 87
Racks 91A and 91B are meshed with A and 87B.
91A and 91B are attached to the support plate 83 with a plurality of bolts and the like via support blocks 93A and 93B.

A plurality of holder blocks 95 are fixed by bolts 97 to the right side of the center of the support plate 83 in FIG. An air cylinder 99 is fixed to the holder block 95 with a plurality of bolts 101. A piston rod 103 is attached to the air cylinder 99 in the left-right direction in FIG. 5, and bars 105A and 105B are attached to the left and right ends of the piston rod 103 in FIG. 5, respectively. The racks 91A and 91B are attached to the bars 105A and 105B.

With the above structure, when the air cylinder 99 is operated to move the piston rod 103 to the left in FIG. 6, for example, the racks 91A and 91B move in the same direction via the bars 105A and 105B.

When racks 91A and 91B move to the left, pinion 87A and 8
7B rotates counterclockwise in FIG. As the pinions 87A and 87B rotate, the pair of loading / unloading work support bars 27 mounted on the pinions 87A and 87B rotate counterclockwise, for example, 90 degrees. By rotating the pair of work support bars 27, the plurality of free bearing devices 79 erected on the pair of work support bars 27 are replaced by the plurality of support pins 77 erected on the machining work support bar 25. Will be sunk against.

Therefore, since the pair of loading and unloading work support bars 27 are rotated, the work W and the free bearing device 79 as a support are not damaged. In addition, a large-sized drive device for rotating the pair of loading / unloading work support bars 7 is not required, and a small device is sufficient, and the device can be mounted in a small space.

A drive device 107 for rotating the pair of loading / unloading work support bars 27 attached to the second table 5D is provided in the frame of the work table 5D as shown in FIG. The drive device 107 has substantially the same structure as the drive device 81 for rotating the pair of loading / unloading work support bars 27 attached to the first table 5U, and thus detailed description thereof will be omitted.

Therefore, the plurality of loading / unloading work support bars 27 attached to the second table 5D are rotated in pairs adjacent to each other.

By the way, the present invention is not limited to the above-mentioned embodiments, but can be implemented in other modes by making appropriate changes. For example, by placing the three-dimensional object work W on the first table 5U and the flat plate-shaped work W on the second table 5D, it is possible to perform a predetermined cutting process by using the three-dimensional object and the flat-plate work W together. Can be useful.

The operation of the invention according to this embodiment is summarized as follows.

That is, the first table is driven by the first transfer driving device.
5U is transferred from the loading / unloading station H to the processing station S. Further, by moving the movable table 29 to the left by driving the second transfer driving device, the second table 5D is integrated with the movable table 29 from the processing station S to the loading / unloading station H at a position below the first table 5U. Transfer to. After transferring the first table 5U to the processing station S and the second table 5D to the loading / unloading station H, the second table is lifted by the operation of the cylinder 71 and lifted to a predetermined height position. Then, when the work W supported by the first table 5U is subjected to thermal cutting, and the work W after processing is supported by the second table 5D, the work W after processing is performed.
Workpiece W to be processed from the second table 5D
Are loaded into the second table 5D. At this time, it is not always necessary to raise the second table 5D.

Laser processing is performed on the work W supported by the first table 5U, and after the work W is carried into the second table 5D, the second table 5D is lowered by the operation of the cylinder 71 to move the work table W below the first table 5U. Position it (position lower than the lower side of the first table). Next, the first table 5U is transferred from the processing station S to the loading / unloading station H by driving the first transfer driving device. Also, the second
By moving the movable table 29 to the right by driving the transfer driving device, the second table 5D can be integrally transferred with the movable table 29 from the loading / unloading station H to the processing station S at a position below the first table 5U.

After the first table 5U is transferred to the loading / unloading station H and the second table 5D is transferred to the processing station S, the second table 5D is lifted by the operation of the cylinder 71 and lifted to a predetermined height position. Then, the work W supported by the second table 5D is laser-processed, the processed work W is carried out from the first table 5U, and the work W to be processed next is carried into the first table 5U. .

Further, when performing the maintenance of the work table 5 on the side of the loading / unloading station H, the operation of the cylinder 71 causes the second table 5D to be located below the first table 5U, and First by driving
The table 5U is transferred to the processing station S, and the second table 5D is transferred to the processing station S integrally with the movable table 29 by driving the second transfer driving device.
As a result, the upper side of the work table 5 on the loading / unloading station H side can be opened.

When performing maintenance on the processing station S side of the work table 5, the first and second transfer drive devices are driven to transfer the first and second tables 5U and 5D to the loading / unloading station H, and the work table 5 is moved. The upper side of the processing station S side is opened.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, while performing the thermal cutting process on the work supported by the first table or the second table, Second
Since the work can be carried in and out (carrying in and out) with respect to the table or the first table, the work supported by the first table or the second table is cut, and then the second table or The work supported by the first table can be immediately prepared for the heat cutting process, and the processing time of a series of heat cutting processes performed on many works can be shortened.

Also, a first transfer drive device that transfers the first table between the processing station and the loading / unloading station, and a second transfer drive device that transfers the second table between the processing station and the loading / unloading station at a position below the first table. By providing the devices separately, it is possible to open the upper side of the working table side of the work table or the upper side of the carry-in / out station side, and the maintenance of the work station side and the carry-in / out station side of the work table becomes easy.

Further, by providing the movable table below the first table so as to vertically move the second table, the second table is raised with respect to the movable table in order to lift the second table to a predetermined height position. It is sufficient to reduce the capacity of the cylinder to reduce the cost.
By shortening the lifting time of the second table, it is possible to further improve the shortening of the processing time of a series of thermal cutting processes.

[Brief description of drawings]

FIG. 1 is a schematic front view of a laser beam machine according to an embodiment of the present invention. 2 is a plan view of the work table, FIG. 3 is a front view of FIG. 2, and FIG. 4 is a left side view of FIG. FIG. 5 is an enlarged plan view of the V arrow section in FIG. 2, FIG. 6 is a VI arrow view in FIG. 5, and FIG. 7 is a sectional view taken along the line VII-VII in FIG. [Explanation of symbols showing main parts of drawing] 1 ... Laser processing machine, 3 ... base 5 ... work table, 5U ... first table 5D ... second table, 25 ... work support bar for processing 27 …… Work loading / unloading work support bar, 29 …… Movable base 71 …… Cylinder, 77 …… Support pin 79 …… Free bearing device, 81 …… Drive device 87A, 87B …… Pinion, 91A, 91B …… Rack

Claims (1)

(57) [Claims] 1. A first transfer drive device, which comprises a first table and a second table, transfers the first table between a processing station and a loading / unloading station, and a second table is provided below the first table. A movable table for supporting the movable table is provided so as to be movable up and down, and a second transfer drive device for moving the movable table is provided for transferring the second table between the processing station and the loading / unloading station below the first table. A work table in a thermal cutting apparatus, characterized in that a table is provided with a cylinder for moving the second table up and down.