JPS637386Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a laser processing head device for attaching to a turret punch press, and more specifically, it is capable of being easily attached to and detached from the die holder of a punch press without using tools. The present invention relates to a laser processing head device which can be held in a locked state without using a fixing device or the like after adjusting the focal position of a condensing lens.

Conventionally, when processing materials with high tensile strength using a punch press, or when processing a hole larger than the punch diameter using nibbling, there were problems such as adverse effects on the punch and die or large noise. There was a problem. For this reason, there are punch presses equipped with plasma arc cutting equipment, but they have drawbacks such as the cutting surface being sloped, toxic gas being generated during processing, and the life of the plasma arc nozzle being short. It was not possible to effectively solve the problem.

Further, a turret punch press equipped with a laser processing device has been developed, but conventionally, a turret punch press generally has a structure in which a laser processing head is mounted on the frame of the turret punch press. Therefore, it is easily affected by vibration during punching process,
In particular, tools are required to attach and detach the machining head, making it difficult to attach and detach. Further, when moving and positioning the workpiece, it is necessary to perform positional correction depending on punching processing and laser processing.

The present invention was devised in view of the above-mentioned conventional problems, and consists of a laser processing head mounted on the upper turret of a turret punch press so that the punching processing position and the laser processing position coincide. In addition, in order to avoid the adverse effects of vibration during punching, the laser processing head is detachably attached to the upper turret.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

FIG. 1 shows a side view of a turret punch press 1 with an NC device that has implemented this invention. a fixed table 7 that supports a plate-shaped workpiece W (workpiece W);
A turret device 19 includes a workpiece positioning device 9 for positioning the workpiece W, a disk-shaped upper turret 13 equipped with a laser processing head 10 and a punch 11, and a disk-shaped lower turret 17 equipped with a die 15. and is provided. Further, a ram body 23 equipped with a striker 21 for striking the punch 11 of the upper turret 13 is mounted on the frame 5 so as to be movable up and down.

The fixed table 7 is provided on a lower frame 29 located below the bosom portion 3 of the C-shaped frame 5, and the workpiece positioning device 9 is
A movable table 3 supported so as to be movable in the left and right direction via a rail 31 installed on the lower frame 29
3, a carriage 37 supported so as to be movable in the front and back direction via a rail 35 built on the movable table 33, and a clamp 39 provided on the carriage 37 for clamping the workpiece W. The workpiece W can be positioned in the front, rear, left and right directions with respect to the turret device 19.

The turret device 19 includes an upper frame 41 located above the pocket portion 3 as described above.
A disc-shaped upper turret 13 is rotatably supported via a rotating shaft 43, and a disc-shaped lower part is rotatably supported via a rotating shaft 45 by a lower frame 29 located below the pocket portion 3. Turret 1
The upper turret 13 and the lower turret 17 are synchronously rotated in the same direction by a rotation drive device (not shown) such as a servo motor. A plurality of punches 11 are supported near the outer periphery of the upper turret 13, and a plurality of dies 15 corresponding to the plurality of punches 11 are supported on the lower turret 17.

The ram main body 23 is vertically movably supported by the upper frame 41 and is located above the circular locus drawn by the plurality of punches 11 supported by the upper turret 13.
A striking element 21 for striking the punch 11 is attached.

As shown in FIG. 2, the laser processing head 10 mainly includes a laser beam focusing device 47, an elevating device 49 that moves the focusing device 47 up and down, an assist gas injection device 51, and a workpiece W. It is composed of a holding plate holding device 53.

The laser beam focusing device 47 is removably housed inside a pipe 55 inserted into the upper mold holder 13a of the upper turret 13. That is, the cylindrical outer frame 57 of the light condensing device 47 is
It is removably screwed onto the inner surface of the pipe 55 to adjust the light condensing device 47 in the vertical direction. A nut 59 for fixing the outer frame 57 is screwed into the inner surface of the pipe 55 at the lower part of the outer frame 57. Further, on the inner peripheral surface of the upper part of the outer frame 57,
A ring-shaped convex portion 61 is formed, and a nut 6 screwed into the convex portion 61 and the inner surface of the outer frame 57 is formed.
3 holds a ring 65 and a condensing lens 67 between them. A gap formed between the edge of the outer periphery of the condensing lens 67 and the inner surface of the outer frame 57 is
Reference numeral 69 is for suppressing the temperature rise of the condensing lens 67 that occurs when the laser beam passes through the condensing lens 67 by supplying cooling water.

A support member 73 is mounted on the top of the pipe 55 so as to be detachable via a knob 75, and the support member 73 directs the horizontally incident laser light α toward the condenser lens 67. A reflective bend mirror 71 is fixed.

On the other hand, a support member 79 is rotatably provided near the rotation shaft 43 of the upper turret 13.
This support member 79 has a laser oscillator (not shown).
The laser beam β oscillated from the bend mirror 7
A bend mirror 77 is fixed to reflect the light toward 1. A pipe 81 bent at right angles is attached to the bend mirror 77, and one end of the pipe 83 is slidably attached to the right end of the pipe 81 via a spring 87 and a pin 85. It is inserted. Further, the other end of the pipe 83 is connected to a hole 73a provided in the side surface of the support member 73.
It is inserted freely into the

Note that a shutter for blocking the laser beam is provided at an appropriate location near the oscillator, and cooling channels may also be provided around the bend mirrors 71 and 77.

Next, the elevating device 49 that moves the light condensing device 47 up and down will be explained. In FIG. 2, a rotary drive device 89 is fixed to the upper turret 13 on the left side of the pipe 55, and this rotary drive device 89 is connected to an air micrometer that measures the amount of change in the thickness of the workpiece W. and a measuring device (not shown). A worm 91 is integrally attached to the rotation shaft of the rotation drive device 89. A worm wheel 93 screwed into the worm 91 is rotatably supported by a support member 97 via a bearing 95 provided around the pipe 55. Further, a nut 99 that is removably fitted into a recess 98 provided at the upper part of the worm wheel 93 rotates together with the worm wheel 93, and further, the nut 99 is attached to the upper part of the pipe 55. It is screwed into a threaded portion formed on the outer circumferential surface. On the other hand, a linear groove 101 is formed in the lower part of the pipe 55 in the vertical direction, and a key 103 fixed to the upper turret 13 is fixed to the upper turret 13 to prevent the pipe 55 from rotating.
It engages with the groove 101.

Next, the assist gas ejection device 51 will be explained. A nozzle 109 is attached to the inner surface of the lower part of the pipe 55, and a passage 107 is formed in the vertical direction inside the side wall of the pipe 55. A lower end of the passage 107 communicates with the inside of the pipe 55, and an upper end of the passage 107 communicates with the inside of the pipe 55.
It communicates with an introduction pipe 105 provided on the side surface of the tube. The introduction pipe 105 supplies assist gas from an assist gas generator (not shown) to the pipe 5.
It is intended for introduction into the tube of No. 5.

Next, to explain the plate holding device 53, an elastic member such as a spring is attached to the lower part of the pipe 55 so as to surround the nozzle 109.
11, an annular plate holding member 113 is supported, and a free bearing 115 is mounted on the lower surface of the plate holding member 113.

Next, the operation of this embodiment having the above configuration will be explained.

First, the workpiece W is positioned by the workpiece positioning device 9 controlled by the NC device. In this case, since the processing center (processing position) of the laser processing head 10 coincides with the processing position of the punch press 1, there is no need to make any special correction to the NC device. Next, the rotary drive device 89 is rotationally driven according to the thickness of the workpiece W by a plate thickness measuring device (not shown). The rotational drive device 8
The rotational force of 9 is transmitted to the worm wheel 93 via the worm 91, and the worm wheel 93 and the nut 99 screwed onto the outer peripheral surface of the pipe 55 work together to rotate around the pipe 55. do. On the other hand, since the pipe 55 does not rotate because the groove 101 provided at the lower part of the pipe 55 and the key 103 fixed to the upper turret 13 are fitted, the pipe 55 does not rotate. Due to the rotational force of the pipe 55
will move up and down. Therefore, depending on the thickness of the workpiece W, the light condensing device 47 provided inside the pipe 55 is always positioned at the optimum processing position by the lifting device 49.

Further, since the elastic member 111 provided at the lower part of the pipe 55 urges the plate holding member 113 downward, the surface of the workpiece W is held by the free bearing 115 provided at the lower part of the plate holding member 113. Press.

Next, the laser beam β oscillated by a laser oscillation device (not shown) is reflected at right angles by the bend mirror 77, and the reflected laser beam α
is further reflected at right angles by the bend mirror 71. The reflected laser beam then enters the condenser lens 67 and is focused on the processing position of the workpiece W, thereby performing laser processing.

Further, during the laser processing, the assist gas introduced into the pipe 55 through the assist gas introduction pipe 105 and the passage 107 is injected from the nozzle 109 toward the processing surface of the workpiece W. , removal of the melted portion of the workpiece W, etc. are performed. Cooling water supplied from a water supply device (not shown) is circulated through a gap 69 formed at the outer edge of the condenser lens 67 to prevent the temperature of the condenser lens 67 from rising. do. Furthermore, in order to remove the laser processing head 10, as shown in FIG. 2, move the pipe 83 to the left and pull it out from the hole 73a of the support member 73.
The pipes 81 and 83 are rotated about the support member 79 in an appropriate direction. Then, the bend mirror 71 and the support member 73 are taken out upward, and then the pipe 55 is taken out from the upper turret 13, in this order.

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. The upper mold holder attached to the upper turret of the press is positioned below the striker, and this upper mold holder has an annular worm wheel formed with a recess on the upper surface and meshed with the worm. It is rotatably supported. A pipe having a nozzle at its lower end and a condensing lens inside is removably fitted into the upper mold holder.
The pipe is formed with a key groove that can be freely engaged and detached from the key attached to the upper turret, and a nut that can be freely engaged and detached from the recess of the worm wheel and rotates integrally with the worm wheel is attached to the pipe. It is screwed onto the outer circumferential surface.

Therefore, according to the present invention, when punching and laser processing are performed, for example, it is not necessary to correct the origin position. Further, the pipe can be attached and detached from the upper mold holder by simply engaging a key with a keyway and fitting a recess of a worm wheel with a nut, and is extremely easy to attach and detach. In other words, when replacing a condenser lens, etc., the pipe can be accurately positioned with respect to the upper mold by engaging the keyway with the key and fitting the recess of the worm wheel with the nut. Become. Further, since the pipes can be simply fitted and removed from the top and bottom, no tools are required.

Further, by rotating the worm wheel with a worm, the nut is rotated and the pipe is moved up and down, thereby adjusting the focal position of the condenser lens. At this time, due to the engagement between the worm and the worm wheel, the pipe does not rotate naturally due to external force, so a locking device or the like is not required, and the focus position can be easily adjusted.

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

[Brief explanation of the drawing]

Figure 1 is a side view of a turret punch press with NC mounting equipped with a laser processing head, and Figure 2 is a side view of a turret punch press with an NC attachment.
It is a partial side sectional view of the figure. Explanation of main symbols shown in the drawings: 1... Punch press, 13a... Mold holder, 47... Light condensing device.

Claims (1)

[Scope of utility model registration request] Upper turret 1 in turret punch press
A cylindrical upper mold holder 13a is attached to the turret punch press 3 and positioned below the striking member 21 of the turret punch press. A pipe 55 rotatably supported by the upper mold holder 13a, having a nozzle 109 at its lower end and a condensing lens 67 inside, is provided in the upper mold holder 13a so as to be able to be fitted into and removed from the pipe 55. A key groove 101 is formed in the pipe 55 and can be freely engaged and detached from the key 103 attached to the turret 13, and a nut 99 screwed onto the outer peripheral surface of the pipe 55 can be freely engaged and detached from the recess 98 of the worm wheel 93. A laser processing head device for mounting a turret punch press, characterized in that it is provided so as to rotate integrally with a worm wheel 93.