JP2000141173A - Automatic cutting surface working device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely, automatically and quickly measure the current residual quantity of cutting in relation to the finished surface in the cutting working in a machining center by providing a long-distance measuring high sensitive CCD zoom camera near a spindle. SOLUTION: A long-distance measuring high sensitive CCD zoom camera 1 is provided near a spindle 5 of a machining center 2 at a position without a danger of hindering the cutting, and this CCD zoom camera 1 is provided with a lens cover to be automatically opened and closed so as to prevent the adhesion of the powdery dust. Plural number of the CCD zoom camera 1 are telescopically provided when necessary. In the case where plural number of this camera 1 are provided, more accurate measurement is possible by computing the mean value of the real value measured by each camera 1. A distance between a material 4 and the spindle 5 is measured by this CCD zoom camera 1 per unit of 1/1000 mm-1/100 mm, and the accurate cutting is thereby secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cutting at a machining center using a long-distance measurement high-sensitivity CCD zoom camera.

[0002]

2. Description of the Related Art Conventional machining in a machining center involves a slight change in tool length due to temperature, humidity, the state of a cutting edge of a tool, heat of a machine, etc. at the time. I used a touch sensor etc., but since the touch sensor etc. has to come in contact with the material or bring it to the very last point of the material, it absolutely requires a considerable time, it can not be unmanned, even a skilled mechanic, In many cases, the remaining movement amount was incorrect, causing the machining center to collide with the material and disrupt the machine accuracy.

[0003]

The disadvantages of the prior art are that it is difficult to completely automate it, and that it takes a considerable amount of time to reach the finished surface, which results in excessive cutting due to failure, It is often the case that a mistake is made and the machine collides and the machine accuracy is disrupted. In order to eliminate the drawbacks, the present invention, unlike touch sensors, does not directly contact the material, maintains a sufficient distance, avoids collisions due to mistakes, and uses the current remaining cutting on the finished surface. Research has been conducted on the task of automatically, quickly and safely measuring the amount.

[0004]

In order to safely, automatically, and quickly measure the current remaining cutting amount on a finished surface, a high-sensitivity CCD zoom camera capable of measuring over a long distance (1) It is to use. This long distance measurement high sensitivity C
Set the tool length of the CD zoom camera to be short, extend the camera by rapid traverse to the reference position with respect to the cut surface, stop automatically, and set the current distance between the material and the spindle (tool length) to 1 It is measured in units of / 1000 mm to 1/100 mm. Also, by using this long-distance measurement high-sensitivity CCD zoom camera, if a constant distance is maintained for all tools immediately before cutting, the tool can be calculated from the input tool length and the remaining travel distance. And avoid collisions caused by mistakes. After experimentation and theory, we found that this method was the best.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has a high-sensitivity CCD zoom camera for long-distance measurement near the spindle of a machining center so as to prevent cutting, and automatically opens and closes a lens cover to prevent dust and the like from adhering. Keep it. If necessary, the long-distance measurement high-sensitivity CCD zoom camera can be extended and contracted. As an application example, a plurality of long-distance measurement high-sensitivity CCD zoom cameras can be provided. If a plurality is provided, the flatness of the cut surface can be measured, and more accurate measurement can be performed by calculating the average value of the actually measured values from different visual fields. First, the present invention first sets a short tool length, performs surface cutting, and measures the remaining cutting amount from the cut surface using a long-distance measurement high-sensitivity CCD zoom camera.
The distance between the current material and the spindle is 1/1000 mm
Measure in units of up to 1/100 mm, correct the tool length, and perform cutting. Although the touch sensor, etc., comes into contact with the material or must be as close as possible to the material, it was not possible to extend the measuring device by rapid traverse to the reference position in the program, but the present invention is non-contact, In order to measure with a high-sensitivity CCD zoom camera that can measure while maintaining the distance, the built-in program extends the camera to the reference position in rapid traverse and automatically stops, autofocus, and adjusts the lens of the high-sensitivity CCD zoom camera. The focus is set within the depth of focus, and the program automatically detects the brightest focus position of the pixel's light sensitivity, so the distance between the current material and the spindle (tool length) is automatically and accurately determined. Can be measured. In order to program all of these operations, a horizontal machining center can be 360
人 Can be unmanned in surface cutting. Also, if all tools are kept at a fixed distance between the material and the tool immediately before cutting, the distance from the spindle to the material can be measured using a long-distance measurement high-sensitivity CCD zoom camera. Compare the input tool length with the work coordinates of the program, calculate the remaining travel distance, and if there is a possibility of collision,
By automatically correcting with a program, machining can be performed safely and accurately without causing collision between the machining center and the material. Furthermore, not only the distance between the material and the spindle (tool length) can be measured, but also the hole diameter can be measured by using a high-sensitivity CCD zoom camera. If the cutting edge of the tool is automatically adjusted, Automatic drilling is also possible for drilling. Although the present invention was experimentally converted into a macro by a program and performed, it was possible to automate more accurately, quickly and completely than conventional machining, and to safely cut.

[0006]

Since the present invention has the above-described configuration,
Unlike when using a touch sensor, etc., collisions due to mistakes are avoided, and rapid, automated, safe, and accurate cutting can be performed.

[Brief description of the drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a configuration diagram of a surface processing when cutting is performed using the present invention (flow chart).

[Explanation of symbols]

 1 High-sensitivity CCD zoom camera for long distance measurement 2 Machining center 3 Tool 4 Material 5 Spindle

[Procedure amendment]

[Submission date] January 25, 1999 (1999.1.2
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

In order to safely, automatically, and quickly measure the current remaining cutting amount on a finished surface, a high-sensitivity CCD zoom camera capable of measuring over a long distance (1) It is to use. This long distance measurement high sensitivity C
The CD zoom camera is extended rapidly to the reference position on the cut surface with the tool length set to a short tool length, automatically stopped, and the distance between the current material and the spindle (tool length) is set to 1 It is measured in units of / 1000 mm to 1/100 mm. Since a high-sensitivity CCD zoom camera is used, it is possible to automatically measure and process holes. Also, by using this long-distance measurement high-sensitivity CCD zoom camera, if a constant distance is maintained for all tools immediately before cutting, the tool can be calculated from the input tool length and the remaining travel distance. And avoid collisions caused by mistakes.
After experimentation and theory, we found that this method was the best.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has a high-sensitivity CCD zoom camera for long-distance measurement near the spindle of a machining center so as to prevent cutting, and automatically opens and closes a lens cover to prevent dust from adhering. deep.
If necessary, the long-distance measurement high-sensitivity CCD zoom camera can be extended and contracted. As an application example, a plurality of long-distance measurement high-sensitivity CCD zoom cameras can be provided. If a plurality is provided, the flatness of the cut surface can be measured, and more accurate measurement can be performed by calculating the average value of the actually measured values from different visual fields. First, the present invention sets the tool length to a short value and performs surface cutting, and calculates the remaining cutting amount from the cut surface,
Measure in 1/1000 mm to 1/100 mm units, correct the tool length, and perform cutting. Since the touch sensor, etc., must be brought into contact with the material or as close as possible to the material, it was not possible to extend the measuring device at the rapid traverse to the reference position in the program, but the present invention is non-contact, To measure with a high-sensitivity CCD zoom camera that can measure while maintaining the distance, with the program incorporated,
Extend the camera to the reference position by fast forward and stop automatically, adjust the focus of the lens of the high-sensitivity CCD zoom camera within the depth of focus with auto focus, and furthermore, the brightest focal position of the light sensitivity of the pixel, By automatically sensing with the program, the distance (tool length) between the current material and the spindle can be automatically measured with high accuracy. Since all these operations are programmed, a horizontal machining center can be unmanned in 360 ° surface cutting.
Also, if all tools are kept at a fixed distance between the material and the tool immediately before cutting, the distance from the spindle to the material can be measured using a long-distance measurement high-sensitivity CCD zoom camera. Compare the input tool length with the work coordinates of the program, calculate the remaining travel distance, and if there is a possibility of collision, correct it automatically by the program so that the machining center and the material do not collide, safely,
Can be processed accurately. In addition to measuring the distance between the material and the spindle (tool length), by using a high-sensitivity CCD zoom camera, it is possible to analyze pixel signals with a program and measure the hole diameter and the like. If the cutting edge is automatically adjusted, automatic cutting can be performed even in drilling. Although the present invention was experimentally converted into a macro by a program and performed, it was possible to automate more accurately, quickly and completely than conventional machining, and to safely cut.

Claims (1)

[Claims] 1. A long-distance measurement high-sensitivity CCD zoom camera (1) in a cutting process in a machining center,
An automatic cutting machine equipped with (1) near the spindle.