JPS6294237A - Machine tool for sheet material working - Google Patents

Abstract

PURPOSE:To form a sharp cut surface as in the case of a single purpose machine by supporting a laser machining head on a floor type support frame other than the support frame of the machining head of a composite machine tool and applying said laser machining head to the surface of a sheet metal on a sheet placing table. CONSTITUTION:When moving to a laser machining operation, a cylinder 26 is extended to move a movable table 17 in a direction parting from a lower turret 3l, a window space 28 is formed right in front of the lower turret 3l, and a cradle device 32 is lifted up to form a sheet metal supporting surface which is continued to the movable table 17, with the top of the cradle device 32. And, a cutting operation is carried out for a sheet metal W which is interposedly held by a work holder 23 and moved on the sheet metal supporting surface, with a simultaneously lowered laser machining head L, as in the case of punching. When the cutting operation is completed, the cylinder 26 is contracted, a movable board part is inclined, and a cut-out piece is slid down on an inclined chute-type movable plate 42 and carried out into a collecting box out of the machine by means of a discharge conveyor provided right underneath. Accordingly, it is not necessary to wait for a punching head to damp down before starting operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a machine tool for sheet metal processing, and more particularly to a sheet metal processing machine tool equipped with a laser processing head.

[Conventional technology]

A variety of so-called compound machine tools, which are machine tools equipped with a laser processing head and at least one mechanical processing head for punching, shearing, etc., have been developed. A laser processing head is mounted close to the mechanical processing head on the same frame as the support frame of the target processing head.

For this reason, in conventional multi-tasking machine tools equipped with laser processing machines, vibrations from the mechanical processing 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 of the laser cutting to become uneven. Problems may occur, such as rough cutting or rough cut surfaces.

The above problem can be solved by using a structure for mounting the laser processing head on the support frame, for example, with an air cushion interposed therein, or by completely separating the operating time of the mechanical processing head and the operating time of the laser processing head. As the time period,
Furthermore, the problem can be resolved 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. A cut surface obtained by laser cutting cannot be as sharp as a cut surface made by a single-function machine dedicated to laser cutting, and furthermore, as mentioned above, another problem arises in that the processing time is extended.

[Problem that the invention seeks to solve]

This invention is a novel machine that can be used in a so-called multi-purpose machine tool equipped with a laser processing machine to make the laser cut surface as sharp as the cut surface made by a single-function machine without causing the other troubles mentioned above. The aim is to provide a sheet metal processing machine tool that is suitable for sheet metal processing.

[Means for solving problems]

Therefore, the present invention provides a floor-standing support frame that is separate and independent from the support frame of the mechanical processing head in the above-mentioned multitasking machine tool, and supports the laser processing head 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〕

Embodiments of a machine tool equipped with a punch processing head as a mechanical processing head will be described below based on the drawings.

Figure 1.2 is an overall front view and a side view, respectively, and this embodiment machine has a sheet metal mounting table (1) on which the sheet metal (W) can be freely moved on its upper surface, and its support frame (2). , upper and lower tool turrets (3U) (3J) and the turrets) (
A punching head (P) as a mechanical processing head consisting of a ram (5) that engages with a punch tool (4) supported by a punching tool (4) and drives up and down; It consists of a frame) fGl, and a laser oscillator (8) connected to a laser processing head (L) mounted on a separate support frame (7) erected in a tower shape around the support frame (6). ing.

(9) is the NC device, and (11) is the laser oscillator (8).
Q, which is a power supply device connected by ) and dac) (+2), will be described in detail below.

First, as shown in Fig. 3.4, the sheet metal mounting table part +1) is mounted on the rail (13) on the support frame (2).
a moving table (+5) f, which is movable along the rail (13) and driven to move by being screwed into a ball screw (+4+ (FIG. 4) 120), and the moving table (18
) fixed, table (country (country θη) sheet metal (W)
The sheet metal moving device (19) is configured to move in the X-axis direction (Fig. 3.4), and the sheet metal moving device (19) is screwed into a ball screw (21) installed within the casing. It consists of a support frame (23) and a work holder (23) fixed to the support frame (4).
3), the sheet metal (W) held at the − side by the moving table (+5) (1G+ and the sheet metal moving device α9) is moved relative to the support frame (2) (in the Y-axis direction);
By moving the support frame of the work holder (in the figure M (X-axis direction)), it can be moved to any position on the plane.

In order to prevent the bottom surface of the work holder from interfering with the movable table snout even when the work holder (23) is moved, the movable table (+7) has a blind-like shape as a whole, and chains (24) at both left and right ends thereof. is a support rail (2) 0 having a downward open end (25a>) provided on the lower surface of the inner side of the left and right moving table (15) θG).
(Fig. 4), supported by the turret (3u) (sl)
By connecting the end of fAU to the support frame (6) via the cylinder (26) and leaving the opposite end free, the support rail □□□ can be moved as the work holder (23) moves. As the movable table (17) moves forward (fourth right row in the figure), a large number of elongated plates that constitute the substantial upper surface of the movable table (17) descend in order from the open end (25a) of the support rail (251), and the work holder (23 ), (Fig. 4 one-dot chain line→two-point filler).Conversely, if the work holder (23) moves backwards (42nd left), the support rail track will go under the two-dot chain line. Moving from the illustration in the direction shown by the dashed-dotted line, the free side end of the movable table (I7) is lifted, and a substantial sheet metal support plane is constituted by a large number of elongated plates (b).

The base 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 is provided with the same horizontal width as the movable table 07) as follows. It is possible to create a window space □□□ that can be opened and closed freely.

That is, the device is the frame side mounting bracket of the cylinder (26), (3+) is the swinging fulcrum of the cylinder mount, and (26)
a) is a cylinder rod, and the chain (24+ end) of the movable table θη is connected to the end of the rod (26a). There is a certain width between the lower turret (si) located far from the lower turret (37) and the position shown in Figure 8 (a) attached as much as possible to (31) and the lower turret (si). The window space ball is moved between the positions shown in FIG. 8 (b) and 4, where the window space ball is formed.

In other words, the cylinder (2) contracts and the movable table (
17) is pulled towards the direction of (3z) with the support rail (2 yen above the lower turret), the window space disappears and the movable table θ is turreted with the upper surface (3u)C'3g) All of the sheet metal support planes in front The state shown in FIG. 8 (a), which constitutes the The laser processing head (
The state shown in FIGS. 8(B), (C) and 4, in which the lower part of L) is a window space, is the state during laser processing operation. 2
A pedestal device 02 for a laser processing head (L) as described below is provided directly below the barrel.

That is, as shown in a side view in FIG. 4 and an enlarged front view in FIG.
) consists of a lift frame side which is attached to the lift frame (35) so as to be able to rise and fall through a slide guide +341, and a cylinder for driving the rise and fall of the lift frame (35). A vertical plate (37) portion at both ends to which the rod (36a) end of the driving cylinder (36) is attached and the vertical plate +37) portion is provided so as to protrude horizontally and in the upper direction. It consists of a horizontal plate (38) part, and the horizontal plate (38) part is swingable via hinges (41) and fixing plate parts (39) at both left and right ends fixed between the vertical plates. A movable plate (42
The movable plate (44 part is the vertical plate (37
) The cylinder (4) placed between the cylinder (4) becomes horizontal as shown in Figure 4.5 due to its expansion, and its upper surface forms the supporting surface for the sheet metal (W) during laser processing, and the cylinder (
43), it becomes the inclined state shown in FIG. 8(d), and its upper surface constitutes the chute surface of the cutting piece (Wa).

(441 is a shaft connected to the pinion (4) that engages with the rack (4) fixed to the back of the left and right vertical plates (371) (44 and the rack (a) and pinion (40) Synchronize the vertical movement of the vertical plate 0η,
Elevating frame (3 metal bodies are designed to move up and down while maintaining horizontality.

In addition, [47] is a suction port for slag, dust, etc. generated during laser cutting, which is formed in the center of the movable plate (4).
+481 is the suction port (suction pipe following 4η, G191
is a water surface ejector installed directly below the suction port (47).

51) is a reinforcement pad for the above-mentioned fixed nap.

Next, a description will be given of the laser processing head (L) which is vertically installed from the laser oscillator (8) and penetrates through the support seven frames (6) of the punch processing head (P). ) is a laser beam guide tube 6a [Co., Ltd.] that extends and contracts like a telescope and extends from a laser oscillator (8), and the intermediate guide 153 is driven up and down to move the lower part of the guide tube to the sheet metal ( W) an elevating drive device 64 that moves up and down between a position as close as possible to the surface (dotted chain line in Figure 6) and a position that is greatly elevated (solid line in Figure 6);
It consists of a focus adjustment device (to) at the lower end of the guide tube. The elevating drive device 541 has a cylinder (51) connected to a movable plate 6D that is vertically slidable and fixed to an intermediate guide cylinder base via a bracket (51).
By expanding the cylinder, the state shown by the dashed line in FIG. 6 is obtained, and by contracting, the state shown by the solid line is obtained.

The main body side of the cylinder (to) is connected to a support plate 6υ hanging from the separately installed tower-like support frame (7), and a rail on which the movable plate 6η engages and slides. The bolt is also fixed to the support plate 6D, and the laser processing head (L) is connected to the punch processing head (P).
) passes through the support frame (6), but is not supported at all by the support frame (6), and is entirely supported by the support plate 6υ, that is, the support frame (7).

(Foundation) is a slide bearing member for a rail can fixed on the back side of the moving plate 6η, and the 1lis trowel is a processing head (L).
The limit switch for detecting the intermediate lowering position and the limit switch for detecting the lowest lowering position, Fi71FA, are dogs corresponding to each of the above-mentioned limit switches.

A focusing barrel holding a condensing lens σ0 with seven flange-shaped portions (a9a) formed in the middle is fitted into the lower end of the guide barrel so as to be slidable up and down (Fig. 7). A disk member σj that contacts the surface of the sheet metal (W) via a connecting rod σ2 is fixed to the seven flange-shaped portions (53a) at the lower end, and the disk member σJ is connected to the guide tube l! Part i3 has a cylinder ■, and the focal position is adjusted by slightly moving the focus adjustment tube up and down with respect to this disc member σJ, and the focus adjustment tube II has the following: A focus adjustment device (to) is provided.

That is, a nut member σ◇ is fixed at a proper position on the seven flange-shaped portions (69a), and a motor (c) with a speed reduction mechanism is installed on the seventh lung portion (53a) at the lower end of the guide cylinder on the nut member a. A screw member 6e fixed to the output shaft of the motor (c) is screwed into the flange-shaped portion 7 (69).
The focus is adjusted by moving a) up and down. ◇ ση is a proximity switch that detects the upper and lower limits of the 7 flange-shaped parts (a9a), and when the proximity switch ση is turned on, the motor ( c) is stopped, but the 7 flange-like part (6
The vertical strokes of 9a) are also mechanically stopped by the respective next stoppers.

That is, the ascending end is regulated by the urethane rubber σ fixed on the upper surface of the 7-lung portion (69a) coming into contact with the lower surface of the 7-lung portion (53a) at the lower end of the guide tube, and the lower end of the screw member σe is regulated. The descending end is regulated by the seventh rung part (69a) of the focus adjustment barrel coming into contact with the annular urethane rubber member υ provided on the seventh rung part (76a).

Note that the motor σ9 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 tube can be adjusted more accurately by remote control.

@2 is a free-rotating ball provided on the lower surface of the disc member ff3, and the ball z is in rolling contact with the sheet metal (W) surface.

Next, the tower-shaped support frame (7) of the laser processing head (L) will be explained.
) consists of a ceiling plate installed on four pillars erected directly from the floor (F), and the laser processing head (L) is installed and inspected on the ceiling plate. In order to prevent workers from falling while performing work, etc., a fence (c) of a predetermined height is installed around the area.

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

That is, during punching, the pedestal device (32+) is set to the lowered position, and the cylinder (26) is contracted to draw the movable table (I7) to the lower position (36) (Fig. 8 (a)). , the movable table 07) and the left and right movable tables (+5) (16) together with the sheet metal (
The sheet metal (W) held between the work holders (23) is punched while moving in the X and Y axis directions according to a predetermined NC program. At this time, the movable table αη is the movable table on both sides (+
5) (As the work holder (23) moves while being supported on the rail (A) provided on the lower surface of the inner side of lφ, that is, as the rail (C) moves, it moves as shown between the solid line and chain line in Figure 4. , are raised and lowered while changing their downward bending points, allowing the work holder (23) to move as close as possible to the lower tower (31').

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

When shifting to laser processing operation, as shown in Fig. 4, first extend the cylinder (2 (2) and lower the movable table θη) ((a7) in the direction away from the Move and create a window space (2) just in front of the lower turret (31).
(FIG. 8 (b)), then raise the pedestal device (c) and raise the top surface of the pedestal device (a, that is, the horizontal plate (t)).
The movable table (+7
) to form a continuous sheet metal bearing surface (Fig. 8 (c)).

Even if the laser cutting machine (L) descends at the same time, once the cutting is completed, the cylinder (43) is contracted to tilt the movable plate-shaped portion, and the cutout piece (Wa) is moved into the tilted chute-shaped movable It slides down on the plate (2) and is carried out into the collection box (b) outside the machine by the discharge conveyor (Fig. 2, Fig. 8 (d)) located directly below.

During this laser processing, the movable table θη moves up and down while changing its downward bending point as the work holder (B) moves, that is, the rail (to) moves.
2) In other words, allow movement as close as possible to the lower turret of the sheet metal (W) (31>).Also, the laser processing head (
L) is raised to an intermediate height detected by the limit switch haze.

In addition, the start of this laser processing is carried out separately and independently from the supporting frame (6) of the punch processing head (P), so that the support of the processing head (L) is performed separately and independently from the supporting frame (6) of the punch processing head (P).
As soon as preparations such as lifting of the punching head (P) and lowering of the processing head (L) are completed, the punching process can be started immediately, and there is no need to wait for vibration damping of the punching head (P) and its support frame (6).

Further, it goes without saying that the punch processing head (P) in the above embodiment may be replaced with another mechanical processing head such as tapping processing or shearing processing.

〔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 does not suffer from problems such as an increase in the overall processing time due to the reasons stated at the beginning. Composite machining can be performed in the shortest possible time without any 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.

[Brief explanation of drawings]

Fig. 1 is a front view of one embodiment of the sheet metal working machine tool according to the present invention, Fig. 2 is a side view of the same, Fig. 3 is a plan view of the sheet metal mounting table section, and Fig. 4 is a movable table and a pedestal. A side view of the device (viewed along the line IV-W in Figure 3), Figure 5 is a front view of the pedestal device (viewed along the line v-v in Figure 4), and Figure 6 shows the laser processing head. , FIG. 7 is an enlarged front view of the focus adjustment device, and FIG. 8 is an explanatory diagram of the operation. (1)...Sheet metal mounting table (6)...Support frame (7)...Support frame (8)...Laser oscillator θ9)...Sheet metal moving device (P)...Punching processing Head (L)...Laser processing head (W)...Sheet metal Figure 6 Figure 7

Claims (1)

[Claims] A support frame for the mechanical processing head, comprising a sheet metal mounting table that freely moves the sheet metal on the upper surface, and a mechanical processing head that performs processing such as punching and shearing on the sheet metal on the mounting table. A sheet metal processing machine tool, characterized in that it is provided with a laser processing head that is supported by a support frame separate from the machine and faces the sheet metal on the above-mentioned mounting table.