JPH0526616B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a machine tool for sheet metal processing, and more specifically, a sheet metal mounting table equipped with a work holder that is movable to any position on a plane, and The present invention relates to a sheet metal processing machine tool that includes a punch processing head that performs punch processing on a sheet metal on a mounting table, and a laser processing head that performs laser processing on the sheet metal on the sheet metal mounting table.

[Conventional technology]

Machine tools equipped with a laser processing head and a punch processing head, so-called compound machine tools, have been developed, but in order to make the machine more compact, these machines are mounted on the same frame as the support frame for the mechanical processing head. A laser processing head is mounted adjacent to the mechanical processing head.

For this reason, in conventional multi-tasking machine tools equipped with laser processing machines, vibrations from the punching head side are inevitably transmitted to the laser processing head, causing subtle fluctuations in the adjustment of the laser beam and causing the cut surface during laser cutting to become inconsistent. If the cut surface is rough or has a rough cut surface, it may cause problems such as scratches.

The above problem can be solved by using a structure in which the laser processing head is mounted on the support frame, for example, with an interposed air mechanism, or by setting the operation time of the punch processing head and the operation time of the laser processing head to completely different time periods. In addition, this can be solved to some extent by setting the operation start time of the laser processing head after processing by the mechanical processing head has finished and a considerable amount of time has passed and the vibration of the frame has attenuated. In this case, the cut surface by laser cutting cannot be made as sharp as the cut surface by a single-function machine dedicated to laser cutting, and furthermore, as mentioned above, other problems arise such as the length of time required for processing.

[Problem that the invention seeks to solve]

This invention is a novel sheet metal that can be used in a so-called multi-purpose machine tool equipped with a laser processing machine, without causing the above-mentioned problems, and in addition, the laser cutting surface can be made as sharp as the cutting surface with a single-function machine. The company aims to provide processing machine tools.

[Means for solving problems]

Therefore, the present invention provides a multi-purpose machine tool as described above, in which a separate support frame is erected in a tower shape around the punching head support frame, and the laser processing head is supported on this separate support frame. It is proposed that the laser processing head be arranged to face the sheet metal surface on the sheet metal mounting table in the same way as the mechanical processing head.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a machine tool equipped with a punching head as a mechanical processing head will be described below with reference to the drawings.

Figures 1 and 2 are an overall front view and a side view, respectively.
This embodiment machine has a sheet metal mounting table part 1 on which the sheet metal W can be moved freely on its upper surface, a supporting frame 2 thereof, upper and lower tool turrets 3u, 3l, and a punch tool 4 supported by the turrets 3u. A punching head P as a mechanical processing head consisting of a ram 5 which is driven up and down by the punching head, a support frame (C-shaped frame) 6 for the punching head, and a tower-like structure erected around the support frame 6. It consists of a laser oscillator 8 connected to a laser processing head L mounted on a separate support frame 7.

9 is an NC device, and 11 is a power supply device connected to the laser oscillator 8 through a duct 12.

Each part will be explained in detail below.

First, as shown in FIGS. 3 and 4, the sheet metal mounting table section 1 is mounted on the rails 1 on the support frame 2.
3, and is driven to move by being screwed 20 into a ball screw 14 (FIG. 4) along the rail 13;
6, a blind-shaped movable table 17 which is present between the movable tables 15, 16 and will be described in detail later, and tables 15, 16, which are integrally connected 18 and fixed to one end side of the movable tables 15, 16. 17, and a sheet metal moving device 19 for moving the sheet metal W in the X-axis direction (Figs. 3 and 4), and the sheet metal moving device 19 is further screwed into a ball screw 21 installed within the casing. a support frame 22 and the support frame 2
The sheet metal W, which is held on one side by the work holder 23, is moved with respect to the support frame 2 along with the moving tables 15, 16 and the sheet metal moving device 19 ( By moving the support frame 22 of the work holder together (in the X-axis direction), the work holder can be moved to any arbitrary position on a plane.

In order to prevent the bottom surface of the work holder from interfering with the movable table 17 even when the work holder 23 is moved, the entire movable table 17 is shaped like a blind, and the chains 24 at both left and right ends are connected to the left and right ends of the movable table 17. moving tables 15, 16
The ends of the turrets 3u and 3l are connected to the support frame 6 via cylinders 26, and the ends of the turrets 3u and 3l are connected to the support frame 6 via cylinders 26. By making the portion free, if the support rail 25 moves forward as the work holder 23 moves (the fourth
(Right row in the figure), a large number of elongated plates 27 constituting the substantial upper surface of the movable table 17 descend in order from the open end 25a of the support rail 25 and slip under the work holder 23. (Figure 4, one-dot chain line→two-dot chain line). Conversely, when the work holder 23 moves backward (left row in FIG. 4), the support rail 25 moves from the direction shown by the two-dot chain line to the direction shown by the one-dot chain line, and the free side end of the movable table 17 is lifted, and a large number of The elongated plate 27 also constitutes a substantial sheet metal bearing plane.

At the proximal end of the laser processing head L side connected to the frame 6 by the cylinder 26 of the movable table 17 as described above, a window space 28 which can be opened and closed and has the same left and right width as the movable table 17 is provided as follows. It is designed so that it can be formed.

That is, 29 is a frame side mounting bracket of the cylinder 26, 31 is a swinging fulcrum of the cylinder 26, and 26a is a cylinder rod.
The chain 24 end of the movable table 17 is connected to the end 6a, and as the cylinder 26 expands and contracts, the base end of the movable table 17 is connected to the lower turret 3l.
The window space 28 of a certain width is formed between the position shown in FIG. 8A, which is as close as possible to the lower turret 3l, and the lower turret 3l, which is far away from the lower turret 3l. It is designed to move between positions.

In other words, the cylinder 26 contracts and the movable table 17 is pulled toward the lower turret 3l on the support rail 25, and the window space disappears, and the upper surface of the movable table 17 is closed to the entire sheet metal support plane in front of the turrets 3u and 3l. The state shown in FIG. 8A is during punching operation, and the cylinder 2
6 is extended and the movable table 17 is moved on the rail 25 in a direction away from the lower turret 3l,
The states shown in FIGS. 8(b), 8(c) and 4, in which the window space 28 is formed below the laser processing head L vertically installed from the laser oscillator 8, are the states during laser processing operation. A pedestal device 32 for a laser processing head L as described below is provided directly below the window 28 of the table that opens and closes.

That is, as shown in a side view in FIG. 4 and an enlarged front view in FIG. The lifting frame 35 is attached to the lifting frame 35 so as to be able to rise and fall freely through the
The lift frame 35 has the slide guide 34 attached to its back surface, and the rod 3 of the drive cylinder 36 to its front surface.
It consists of a vertical plate 37 section at both ends to which the end 6a is attached, and a horizontal plate 38 section provided horizontally overhanging the top of the vertical plate 37 section. Consisting of a fixed plate 39 portion at both left and right ends, and a movable plate 42 portion swingably provided via a hinge 41, the movable plate 42 portion has a cylinder 43 disposed between it and the vertical plate 37. When the cylinder 43 expands, it becomes horizontal as shown in Figures 4 and 5, and its upper surface forms a support surface for the sheet metal W during laser processing, and when the cylinder 43 contracts, it becomes horizontal as shown in Figures 8-D. In a tilted state,
The upper surface constitutes the shoot surface of the cutout piece Wa.

Reference numeral 44 denotes a shaft connected to a pinion 46 that meshes with a rack 45 fixed to the back surface of the left and right vertical plates 37, and the vertical movement of the left and right vertical plates 37 is synchronized by the shaft 44, the rack 45, and the pinion 46. The entire elevating frame 35 is raised and lowered while keeping it horizontal.

Further, 47 is a suction port formed at the center of the movable plate 42 for removing slag, dust, etc. generated during laser cutting, and 48 is a suction pipe following the suction port 47;
49 is a water mist ejector provided directly below the suction port 47.

Reference numeral 51 indicates a reinforcing groove for the fixing plate 39.

Next, the laser processing head L that is vertically installed from the laser oscillator 8 and passes through the support frame 6 of the punch processing head P will be explained.
The processing head L is a laser beam guide tube 5 extending from a laser oscillator 8 and expanding and contracting in a telescopic shape.
2, 53, the intermediate guide cylinder 53 is driven up and down to move the lower end of the guide cylinder to a position as close as possible to the sheet metal surface W on the table 1 (dotted chain line in Fig. 6) and a position where it is greatly elevated ( It is comprised of an elevating drive device 54 that moves up and down between the guide tube (solid line in FIG. 6), and a focus adjustment device 55 at the lower end of the guide tube. Lifting drive device 5
4, a cylinder 58 is connected 59 to a movable plate 57 which is fixed to an intermediate guide cylinder 53 via a bracket 56 and can slide up and down, and when the cylinder 58 is expanded, the state shown by the dashed line in FIG. Due to the contraction, the state shown by the solid line is obtained.

The main body side of the cylinder 58 is connected 62 to a support plate 61 hanging from the separately installed tower-like support frame 7, and the rail 63 on which the movable plate 57 engages and slides is also connected to the support plate 61. Although the laser processing head L passes through the support frame 6 of the punch processing head P, it is not supported by the support frame 6 at all, and is entirely attached to the support plate 61. In other words, support frame 7
is supported by.

64 is a rail 63 fixed to the back surface of the movable plate 57
Slide bearing members 65 and 66 are respectively a limit switch for detecting the intermediate lowering position and a limit switch for detecting the lowest lowering position of the processing head L.
7 and 68 are the limit switches 65 and 6, respectively.
It is a dog corresponding to 6.

At the lower end of the guide tube 53, a flange-shaped portion 6 is provided in the middle.
A focusing barrel 69 holding a condensing lens 71 formed with a lens 9a is fitted in a vertically slidable manner (FIG. 7), and a flange-shaped portion 53a at the lower end of the guide barrel 53 is fitted.
A disk member 73 that contacts the surface of the sheet metal W via a connecting rod 72 is fixed to the disk member 73.
When the guide cylinder 53 is lowered due to the extension of the cylinder 58, it is always in close contact with the surface of the sheet metal W with an appropriate pressure. The focal position is adjusted by slightly moving up and down, and the focus adjustment tube 69 is equipped with a focus adjustment device 5 as follows.
5 is provided.

That is, a nut member 74 is fixed at a proper position on the flange-shaped portion 69a, and a screw member 76 is fixed to the nut member 74 to the output shaft of a motor 75 with a speed reduction mechanism installed upright on the flange portion 53a at the lower end of the guide cylinder. They are screwed together, and the rotation of the motor 75 moves the flange-shaped portion 69a up and down to adjust the focal point.

Proximity switches 77 and 78 detect the upper and lower limits of the flange-shaped portion 69a, respectively. When the proximity switches 77 and 78 are turned on, the motor 75 is stopped, but the upper and lower stroke ends of the flange-shaped portion 69a are at their respective stoppers. It can also be stopped mechanically.

That is, the urethane rubber 79 fixed to the upper surface of the flange-shaped portion 69a comes into contact with the lower surface of the flange portion 53a at the lower end of the guide cylinder 53, thereby regulating the ascending end, and the flange portion 76 at the lower end of the screw member 76
The descending end is regulated by the flange portion 69a of the focus adjustment tube 69 coming into contact with the annular urethane rubber 81 provided at a.

The motor 75 with a speed reduction mechanism may be a normal analog motor or a servo motor. In the case of a servo motor, the height of the focusing cylinder 69 can be adjusted more accurately by remote control.

Reference numeral 82 denotes an idling ball provided on the lower surface of the disc member 73, and the ball 82 rolls into contact with the surface of the sheet metal W.

Next, the tower-shaped support frame 7 of the laser processing head L will be explained. A fence 85 of a predetermined height is provided around the laser processing head L in order to prevent workers performing installation work, inspection work, etc. of the laser processing head L from falling.

The machine tool of this embodiment is constructed as described above and operates as follows.

That is, during punching, the pedestal device 32 is lowered, the cylinder 26 is contracted, the movable table 17 is drawn near the lower turret 3l (FIG. 8A), and the movable table 17 and the left and right movements are performed. Sheet metal W with tables 15 and 16
The sheet metal W, which is held between the work holders 23 on the support plane, is punched while being moved in the X and Y axis directions according to a predetermined NC program. At this time, the movable table 17 is mounted on and supported by rails 25 provided on the lower surfaces of the inner sides of the movable tables 15 and 16 on both sides, and as the work holder 23 moves, that is, the rails 25 move, the movable table 17 is supported as shown in the solid line and chain line in FIG. The work holder 23 moves up and down while changing its downward bending point as shown in the figure, allowing the work holder 23 to move as close as possible to the lower turret 3l.

Note that the punched pieces produced by the above-mentioned punching process are discharged to the outside of the machine or to the front through a communication passage (not shown) in the frame 6.

When moving to laser processing operation,
As shown in FIG. 4, first, the cylinder 26 is extended to move the movable table 17 in a direction away from the lower turret 3l, and a window space 28 is formed immediately in front of the lower turret 3l (eighth (Fig. B), the pedestal device 32 is then raised, and the upper surface of the pedestal device 32, that is, the horizontal plate 38 portion forms a sheet metal support surface that is continuous with the movable table 17 that has been moved as described above (Fig. 8). Figure c). At the same time, the laser processing head L that has descended also cuts the sheet metal W that is held by the work holder 23 and moves on the sheet metal support surface in the same way as in the punching process described above, and when the cutting is completed, the cylinder 43 is contracted. The movable plate 42 portion is tilted, the cutout piece Wa is slid down the tilted chute-shaped movable plate 42, and is removed from the machine by a discharge conveyor 86 (FIG. 2, FIG. 8 D) disposed directly below. It is carried out into the collection box 87.

During this laser processing, the movable table 17
moves up and down while changing its downward bending point as the work holder 23 moves, that is, the rail 25 moves, allowing the work holder 23, that is, the sheet metal W, to move as close as possible to the lower turret 3l. In addition, the laser processing head L is operated by the limit switch 65.
is raised to an intermediate height detected by.

Note that at the start of this laser processing, the processing head L is supported by the support frame 6 of the punch processing head P.
Since the punching is performed separately and independently from the punching head P, the punching can be started immediately after preparations such as lifting of the pedestal device 32 and lowering of the processing head L are completed, and vibration damping of the punching head P and its support frame 6 is performed. There is no need to wait.

〔Effect of the invention〕

As is clear from the above explanation, although the sheet metal processing machine tool according to the present invention is a so-called compound machine tool equipped with a laser processing machine, it has problems such as prolonging the overall processing time due to the reasons stated at the beginning. Composite processing can be performed in the shortest possible time without causing problems, and the laser cut surface can be made as constant and sharp as the cut surface made by a single-function laser processing machine. In addition, a separate tower-shaped support frame was erected around the punch processing head support frame to serve as the support frame for the laser processing head.In other words, both of these support frames were put together on one side of the sheet metal mounting table. Since the sheet metal mounting table is arranged so that three sides thereof are open, a layout that facilitates loading and unloading of sheet metals to and from the table can be obtained, and the planar space occupation rate can also be reduced.

[Brief explanation of the drawing]

FIG. 1 shows a sheet metal processing machine tool according to the present invention.
FIG. 2 is a front view of the embodiment, FIG. 2 is a side view, FIG. 3 is a plan view of the sheet metal mounting table, and FIG.
Fig. 5 is a front view of the pedestal device (a view taken from the - arrow in Fig. 4), Fig. 6 is a front view of the laser processing head, and Fig. 7 is an enlarged front view of the focus adjustment device. FIG. 8 is an explanatory diagram of the operation. DESCRIPTION OF SYMBOLS 1... Sheet metal mounting table, 6... Support frame, 7... Support frame, 8... Laser oscillator, 19... Sheet metal moving device, P... Punching head, L... Laser processing head, W... sheet metal.

Claims (1)

[Claims] 1. A sheet metal mounting table equipped with a work holder that is movable to any position on a plane, a punching head that punches the sheet metal on the sheet metal mounting table, and a laser beam applied to the sheet metal on the sheet metal mounting table. A sheet metal processing machine tool including a laser processing head that performs processing, wherein a separate support frame is erected in a tower shape around the punch processing head support frame, and the laser processing head is raised and lowered from above the punch processing head. A sheet metal processing machine tool that is supported freely.