JPH08294849A - Device for turning object visible - Google Patents

Abstract

PURPOSE: To distinctly grasp the situation of an object in high speed rotation by image displaying the object in the stationary condition. CONSTITUTION: A device according to the present invention comprises a CCD camera 11 to photograph a work 14 rotating, an encoder 17 to emit the rotating condition signal of the work 14. a frequency counter 18 which performs an angle delay operation using a delay circuit on the basis of the signal given by the encoder 17 and photographs the condition of the rotational position of work 14 with shifted period by the CCD camera 11, and a TV monitor 15 which displays the obtained image from photographing as a stationary image. The condition of any rotational position of the work 14 in its rotating direction is photographed to produce an image, which is displayed on the TV monitor 15 as stationary image, and the work 14 in high speed rotation is image displayed in the stationary condition to serve for distinctly grasping the condition of the work 14 rotating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an object visualization apparatus for photographing a rotating object and displaying an image on the object, and observing the condition of a workpiece or tool in an NC machine tool or the condition of a rotating part of another rotating machine. It is suitable for use when

[0002]

2. Description of the Related Art FIG. 3 shows a general NC machine tool N
The external view of a C lathe is shown. As shown in the figure, the lathe body 1 is provided with a door 2 for covering the processing portion, and a series of processing is performed by the door 2
It is done inside the box so that cutting oil and chips do not scatter outside when the is closed. For this reason,
The operator cannot see the surface condition of the workpiece, chip shape, and various other machining phenomena during machining. That is, as shown in FIG. 4, the workpiece 3 and the cutting tool 4 in the box are
It is not possible to directly visually observe the positional relationship with, the surface state of the workpiece 3, the shape of the chips 5, and the like. The door 2 is provided with a viewing window 6, but the workpiece 3 is rotating at high speed,
The surface condition of the workpiece 3 and the cutting edge of the cutting tool 4 could not be seen. Therefore, it is necessary to change the machining conditions such as the depth of cut and the feed rate, that is, the NC program, by looking at the workpiece 3 after turning. However, in this case, the judgment material necessary for optimally changing the NC program is extremely scarce.

[0003]

In the conventional NC lathe,
Since a series of processing is performed in the box with the door 2 closed,
The operator cannot see the turning state during machining, and must judge the quality of machining by looking at the workpiece 3 that has been machined. Therefore, it has been difficult to set the optimum cutting conditions such as the cutting depth and the feed rate. Therefore, it is desired that the surface condition of the workpiece 3, the shape of the chips 5, and various other processing phenomena can be clearly understood during processing.

A general strobe device is used to photograph the condition of the workpiece 3 during machining and observe the positional relationship between the workpiece 3 and the cutting tool 4, the surface condition of the workpiece 3, the shape of the chips 5, and the like. However, when a general strobe device is used, the illumination time becomes shorter and the image becomes unclear as the rotation speed increases. Further, the strobe light bulb has a short life and is expensive, and the blinking illumination causes light to be emitted intermittently, which causes a problem that an operator is uncomfortable.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an object visualization device capable of displaying an image of an object in a high-speed rotation state as a stationary state.

[0006]

To achieve the above object, the structure of the present invention comprises: photographing means for photographing a rotating object; rotating state detecting means for outputting the rotating state of the rotating object; and the rotating state. The delay means for delaying the rotation angle of the rotating object on the basis of the signal output from the detecting means, and the photographing means operated on the basis of the signal output from the delay means to delay the object. It is characterized by comprising an operating means for photographing the state of the angular rotation position and a display means for displaying the image photographed by the photographing means as a still image.

[0007]

The rotation state detecting means outputs the rotation state of the rotating object, the delay means delays the rotation angle based on the output signal, and the actuating means operates the photographing means based on the output signal from the delay means. Is operated to capture an image of the rotational position of the object at a delayed angle, that is, the position that is out of synchronization with the rotational cycle of the object. The image photographed by the photographing means is displayed on the display means as a still image.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic structure of an object visualizing apparatus according to an embodiment of the present invention when applied to an NC lathe, and FIG. 2 shows a relationship between a rotating state of a workpiece and an image state.

As shown in FIG. 1, a phenomenon-synchronized black-and-white or color CCD camera (CCD camera) 11 and a directionally variable mirror box 12 are provided as NC lathe 1.
3, the image of the workpiece 14 as an object being turned through the mirror box 12 is photographed by the CCD camera 11, and the image is displayed as a still image in real time on the TV monitor 15 which is a display means. This is presented to the worker. Further, an encoder 17 as a rotation state detecting means is provided on the main shaft 16 for driving and rotating the workpiece 14, and a rotation speed signal from the encoder 17 is input to a frequency counter 18 as an operating means. CCD
The camera 11 photographs the state of an arbitrary rotational position of the workpiece 14 based on the signal from the frequency counter 18, and the photographed image is sent to the TV monitor 15 as a video signal. The imaging part is illuminated by the illumination device 19, but the illumination by the illumination device 19 does not need to blink in synchronization with the rotation of the main shaft 16, and may be continuous illumination.

A specific shooting situation will be described. CC
The D camera 11, the mirror box 12, and the lighting device 19 are attached to the NC lathe 13. At this time, the installation position as a reflection type using a mirror selects the front surface of the door 21 of the NC lathe 13 from the positional relationship between the cutting tool 20 and the workpiece 14. Further, two mirrors 22 for light are used in the mirror box 12, and the reversal of the image is prevented by the same principle as a pentamirror used in a single-lens reflex camera or the like. It is also possible to use a pentamirror. The viewing angle of the image can be swung up and down and left and right by operating the reflecting mirror 22 with a joystick. Incidentally, CC
The installation positions of the D camera 11, the mirror box 12, and the lighting device 19 are not necessarily limited to the front of the door 21,
For example, it may be the ceiling part.

A pulse output from an encoder 17 provided on the main shaft 16 is used as an electronic shutter timing signal for the CCD camera 11. At this time, the encoder 17
Outputs a plurality of pulse signals which are rotation number signals indicating the rotation state of the main shaft 16 (rotation state of the workpiece 14). Among them, a pulse signal of TTL level is used once for each rotation. This pulse signal is input to the external frequency counter 18 via a cable. The inputted pulse is used as a shutter trigger pulse of the CCD camera 11 by a delay circuit as a delay means provided in the frequency counter 18 and 0 to 36 depending on the operator's need.
After performing an angle delay operation within the range of 0 degree, it is output as a shutter trigger pulse of the CCD camera 11. Here, the pulse delay operation is performed by slightly shifting the synchronization of the shutter timing of the camera with the rotation cycle of the spindle 16, and the photographing rotation angle position of the workpiece 14 is changed by the delay amount. That is, it becomes possible for the worker to observe the arbitrary surface on the circumference of the workpiece as a visualized image.

The CCD camera 11 receives the pulse for the shutter trigger and receives the pulse for the set exposure time (for example, 1 /
Operate the electronic shutter 1 (times / rotation) for 10000 seconds). The video signal obtained there is output to the image field memory built in the main body of the CCD camera 11. Until the next shutter trigger pulse is input, the image stored in this image field memory
A still image is held and displayed on the screen of the TV monitor 15. That is, as shown in FIG. 2, the image when the shutter trigger pulse is input is until the next shutter trigger pulse is input, that is, the workpiece 1
Hold display is performed while 4 rotates once. When this is photographed by general stroboscopic photography, blackout occurs due to the interruption of the photographing situation and flicker occurs on the screen.
By holding and displaying as a still image on the screen of the TV monitor 15, it is possible to eliminate the blackout, eliminate the flicker of the screen, and display a bright and clear image.

According to the above-mentioned object visualization device, the surface state of the workpiece during high-speed rotation can be observed as a stationary state, so that the finished state can be confirmed even during machining, and furthermore, chipping of the tool can be easily detected. Moreover, since the shape and entanglement of the chips can be clearly observed, it becomes possible to easily judge the quality of the processing conditions such as the cutting depth and the feed rate. In addition, since the slight movement of the cutting edge of the cutting tool 20 can be seen very well, the delicate cutting edge path and the workpiece 1
It is possible to clearly grasp the unevenness of the shape of No. 4 and the processing progress. Further, during machining, many fine scratches on the surface of the work piece 14 caused by the chips colliding with the outer periphery of the work piece 14 can be clearly observed in the image even during NC machining. Therefore, by using the object visualization device, the surface state of the workpiece 14, the shape of the chips, and various other processing phenomena can be clearly understood even during processing. Furthermore, if the processing conditions are changed while visually observing the processing phenomenon (for example, changing the feed or the override), the optimum processing conditions can be easily determined.

In the above embodiment, the object visualizing device is N
Although the example applied when observing the workpiece 14 of the C-lathe 13 has been described, the object visualization device of the present invention is not limited to this, and can be used in various devices and machines such as a rotating tool of a machining center and other rotating equipment. It can be applied when observing or monitoring a rotating object.

[0015]

The object visualization device of the present invention is based on a photographing means for photographing a rotating object, a rotation state detecting means for outputting the rotation state of the rotating object, and a signal output from the rotation state detecting means. A delay means for delaying the rotation angle of the rotating object; an actuating means for actuating the photographing means on the basis of a signal output from the delay means to photograph the state of the rotated position of the delayed angle of the object; Since the image capturing means is provided with a display means for displaying the image as a still image, the image capturing means is operated based on the output signal of the rotation state of the object, and the state of the rotational position deviated from the rotation cycle of the object is captured. It is possible to display the image captured by the display means as a still image. As a result, it is possible to display an image of an arbitrary surface in the rotation direction of the object in the high-speed rotation state as a stationary state, and it is possible to clearly understand the situation of the rotating object.

[Brief description of drawings]

FIG. 1 is a diagram showing an object visualization device NC according to an embodiment of the present invention.
The principal part block diagram applied to the lathe.

FIG. 2 is an explanatory diagram of a relationship between a rotation state of a workpiece and an image state.

FIG. 3 is an external view of a general NCNC lathe.

FIG. 4 is a detailed view of a processing unit.

[Explanation of symbols]

11 Black and White or Color CCD Camera (CCD Camera) 12 Mirror Box 13 NC Lathe 14 Workpiece 15 TV Monitor 16 Spindle 17 Encoder 18 Frequency Counter 19 Illuminator 20 Bytes 21 Door 22 Reflector

Claims (1)

[Claims] 1. A photographing means for photographing a rotating object, a rotation state detecting means for outputting a rotation state of the rotating object,
A delay unit for delaying the rotation angle of the rotating object based on a signal output from the rotating state detecting unit; and a photographing unit operating based on the signal output from the delay unit to operate the object. An object visualization device comprising: an actuating means for photographing a state of a rotational position at a delayed angle; and a display means for displaying an image photographed by the photographing means as a still image.