JP2773940B2 - Turret punch press - Google Patents

Description

The present invention relates to a turret punch press, and more particularly, to a turret punch press having a laser processing head on an upper turret.

(Prior Art) A laser / punch combined processing machine having a laser processing head mounted on a turret punch press and having a punching function and a laser processing function has been developed. Conventional laser-punch combined processing machines generally have a laser processing head mounted on the frame of the turret punch press, and in rare cases, a technology of mounting the laser processing head on the upper turret of the turret punch press is also proposed. Have been.

(Problems to be Solved by the Invention) In a configuration in which a laser processing head is mounted on a frame in a turret punch press, the punching position and the laser processing position in the turret punch press do not match and are separated from each other. When creating a program, an offset is required according to punching processing and laser processing, and sometimes an accident due to a program error may occur.

On the other hand, in the configuration in which the laser processing head is mounted on the upper turret in the turret punch press, the punching position and the laser processing position can be matched, and there is no need for offset when creating a processing program. There is a problem that a plurality of bend mirrors are required in an optical path configuration for guiding a laser beam to a processing head, and the optical path configuration is complicated.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the conventional problems as described above, in the present invention, a waveguide member connected to a laser processing head mounted on an upper turret in a turret punch press. Is guided to the upper end side through the axis of the rotating shaft supporting the upper turret, and the second waveguide member connected to the laser oscillator provided apart from the turret and the waveguide member are connected to the upper end side of the rotating shaft. They are connected by.

(Operation) According to the above configuration, the waveguide member connected to the laser processing head mounted on the upper turret is connected to the second waveguide member connected to the laser oscillator at the upper end side of the rotation shaft supporting the upper turret. Therefore, the laser beam can be guided to the laser processing head with a very simple configuration. In addition, there is a degree of freedom in the optical path for guiding the laser beam,
This prevents the optical path from being entangled even by intense vibration during punching.

(Embodiment) Referring to FIG. 1, in a turret punch press, a fan-shaped or disk-shaped upper turret 1 supporting a number of punches (not shown) is rotated by an upper frame 5 via an upper rotation shaft 3. It is freely supported. Further, a lower turret 7 supporting a number of dies (not shown) corresponding to the punches is connected to a lower frame 11 via a lower rotation shaft 9.
It is supported rotatably.

The upper turret 1 and the lower turret 7 are vertically opposed to each other, and are rotated by motors (not shown) on the upper and lower sprockets 13 and 15 attached to the ends of the upper and lower rotating shafts 3 and 9. Chains 17, 19 are hung. That is, the upper and lower turrets 1 and 7 are configured to rotate synchronously.

A laser processing head 21 is mounted in one of the punch mounting holes 1H formed in the upper turret 1 so that the work W can be laser-processed in the turret punch press. In the laser processing head 21, an inner cylinder 25 is vertically movably mounted in an outer cylinder 23 mounted in the punch mounting hole 1H, and a nozzle, a condensing lens 27 and an optical fiber A support member 31 supporting one end of the waveguide member 29 is supported so as to be vertically adjustable. In addition,
Since various configurations can be adopted for the structure for ejecting the assist gas from the nozzle, the description of the structure for ejecting the assist gas is omitted.

The inner cylinder 25 is supported in an anti-vibration state by an appropriate cushioning device 33 such as an air cushion or a coil spring interposed between the inner cylinder 25 and the outer cylinder 23, and is mounted at an appropriate position such as a frame or a turret. For example, it is lowered by an appropriate pressing device 35 such as a small air cylinder. The axis of the inner cylinder 25 is formed by, for example, a taper portion formed on the outer peripheral surface of the inner cylinder 25 and a taper portion formed on the inner peripheral surface of the outer cylinder 23 when the inner cylinder 25 is lowered by the pressing device 35. The engagement of the engagement portion 37 coincides with the axis of the outer cylinder 23, so that accurate positioning is performed.

The support member 31 is adjusted up and down by a suitable up and down adjustment device 39 such as a screw, for example, and one end of the waveguide member 29 supported by the support member 31 is attached to the condenser lens 27. It is provided so as to irradiate a laser beam in the proximity and downward.

The waveguide member 29 is made of an optical fiber or a hollow waveguide or the like in which the inner peripheral surface of a flexible thin nickel pipe is coated with a germanium thin film to increase the reflectivity of the inner surface. It has a function of guiding a laser beam from one end to the other end. In the present embodiment, the other end of the waveguide member 29 reaches the upper end of the upper rotating shaft 3 through a hole formed in the axis of the upper rotating shaft 3. Then, close to the upper end surface of the waveguide member 29,
The tip of a second waveguide member 43 whose base is connected to the laser oscillator 41 is opposed. The tip of the second waveguide member 43 is supported by a holder 45 that is rotatable relative to the upper rotation shaft 3 and is supported by a part of the upper frame 5. The axes are aligned.

The diameter of the second waveguide member 43 is smaller than the diameter of the waveguide member 29, and the diameter of the second waveguide member 43 is smaller than that of the second waveguide member 29 so that the laser beam can be transmitted from one waveguide member 43 to the other waveguide member 29. Wave guide member 2
It is desirable to keep the 9,43 ends in contact or in close proximity to each other.

When both the waveguide members 29 and 43 are optical fibers, a concave portion 47 having an appropriate shape is formed at the upper end of the upper rotating shaft 3 and the refractive index of the concave portion 47 is substantially the same as the refractive index of the optical fiber. A structure in which the laser beam is transmitted in a state in which the material of the liquid (for example, liquid glycerin, etc.) is filled and the ends of both the waveguide members 29 and 43 are immersed in this material, thereby reducing the loss. Thus, transmission can be performed.

In the lower turret 7, the laser processing head
One end of a suction duct 49 is connected to the die mounting hole 7H corresponding to 21. The suction duct 49 is connected to a suction hole 9H provided at the center of the lower rotary shaft 9 through a groove 49G formed on the lower surface of the lower turret 7, and the suction hole 9H is connected to an appropriate suction device such as a blower. Connected to 51.

In the above configuration, after performing punching on the work W by the punch and the die in the turret punch press, to perform laser processing, the upper and lower turrets 1 and 7 are rotated, and the laser processing head 21 is moved to the turret. It is indexed and positioned below a striker (not shown) provided in the punch press. And the pressing device 35
By lowering the inner cylinder 25 to position it, the laser oscillator 41 is driven, and if necessary, the suction device 51 is operated to perform laser processing.

The laser beam oscillated by the laser oscillator 41 is guided to the upper end position of the upper rotating shaft 3 by the second waveguide member 43 and transmitted to the waveguide member 29 provided at the center of the upper rotating shaft 3. It is guided to the laser processing head 21 by the member 29. Then, the condenser lens 27 provided in the laser processing head 21
And the laser beam is used for laser processing.

It should be noted that the present invention is not limited to only the above-described embodiment, but can be implemented in other modes by making appropriate changes. For example, as a configuration of the suction unit on the lower turret 7 side, instead of the configuration of the duct in the above embodiment, as shown in FIG. A connection port connected to the suction device 51 via a flexible duct below the support block 53 that supports the lower surface.
A sliding block 59 having a shooter portion 57 for discharging scrap during punching is provided, and the sliding block 59 is switched in position by a silicon cylinder 61 in accordance with punching or laser processing. It is also possible.

Further, as a configuration for lowering the inner cylinder 25 provided in the laser processing head 211, it is also possible to lower the inner cylinder 25 by a striker movably provided in a turret punch press, in this case, The pressing device 35 can be omitted.

Further, the upper end of the waveguide member 29 is directed horizontally at an appropriate position, and the end of the second waveguide member 43 is directed horizontally. It is also possible to adopt a configuration in which they are joined together.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, one end of a flexible waveguide member is connected to the laser processing head mounted on the upper turret. The other end of the waveguide member is guided to the upper end through the axis of the upper rotation shaft supporting the upper turret, and the upper end is optically connected to the second waveguide member connected to the laser oscillator. Since the configuration is such that the degree of freedom of the optical path for guiding the laser beam from the laser oscillator to the laser processing head is large, and the configuration of the optical path is extremely simple as compared with the related art,
This prevents the optical path from being twisted due to vibration or the like.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a schematic explanatory view, and FIG. 2 is an explanatory view of another embodiment. DESCRIPTION OF SYMBOLS 1 ... Upper turret, 29, 43 ... Waveguide member 3 ... Upper rotating shaft, 41 ... Laser oscillator

Claims (1)

(57) [Claims] 1. A waveguide member connected to a laser processing head mounted on an upper turret in a turret punch press is guided to an upper end side through an axis of a rotation shaft supporting the upper turret, and is provided separately from the turret. A turret punch press, wherein a second waveguide member connected to the laser oscillator and the waveguide member are connected at an upper end side of a rotating shaft.