JP3005515B2 - Centering method of drilling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for centering a drilling machine suitable for drilling a workpiece such as a ceramic green sheet or a printed circuit board.

[0002]

2. Description of the Related Art Conventionally, in this type of centering system, a camera unit is arranged on a machine base along with a punching unit provided with a punch, adjacent to the punching unit.
A centering camera is installed in the punching unit or camera unit, and the punching mark with the workpiece is moved from the work sending reference point to immediately below the centering camera, and the punching mark is imaged by the centering camera and linked. During teaching for binarization and detection (centering) with the processing device,
There is a controller that inputs a punch shape to a control unit that controls the work in the X-axis and Y-axis directions so that the perforated mark is located immediately below the corresponding punch. The control unit moves the workpiece artificially from the reference point, detects the center of the drilling mark with the centering camera, and inputs (teaches) the corresponding punch. Calculates the moving distance in the X-axis direction and the Y-axis direction necessary to move the punch mark to the corresponding punch at an appropriate distance, and moves the punch mark to immediately below the relevant punch. ing. Also,
In this centering system, when a work serving as a reference point is artificially moved and a reference hole is detected (centered) by a centering camera, and a corresponding punch is input (teaching), the centering is performed. There is also a control in which a punch is moved after moving a portion separated from the hole by a predetermined pitch to a corresponding punch which is fixed at a distance from the camera. The magnification of the lens of the centering camera used in such a centering system is uniform.

[0003]

The perforated marks and reference holes are different for each work, and even a single work has large and small diameter perforated marks and reference holes scattered. Drilling mark, reference hole is minimum diameter 0.1mm
To a maximum diameter of 5 mm. If a small-diameter drill mark or hole is to be captured at a magnification suitable for the small-diameter hole mark or hole, a part of the large-diameter drill mark or hole is imaged, so that the center of gravity can be measured (see FIG. 2 (monitor screen)). Otherwise, center detection (centering) cannot be performed, resulting in poor workability.
Conversely, when trying to capture a large-diameter drill mark or hole at a magnification suitable for it, the resolution of the small-diameter drill mark or hole is reduced and the centering accuracy is degraded. It is also difficult. For this reason, as a practical matter, although a centering camera having a magnification suitable for a perforated mark or hole having an intermediate diameter of 5 mm to 0.1 mm is captured, the centering accuracy and centering work are not suitable. In addition, there is a zoom centering camera with a variable magnification, but there is a problem in centering accuracy because the optical axis shifts.
Not suitable.

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional circumstances, and a technical problem is that a centering camera having an optimum magnification is used to form a perforated mark or a reference hole provided on a workpiece having a different plane area. An object of the present invention is to improve productivity as well as centering accuracy by imaging.

[0005]

According to a first aspect of the present invention, there is provided a camera unit installed adjacent to a punching unit or a camera unit installed adjacent to the punching unit. A plurality of different centering cameras are installed, and each piercing mark with a different plane area attached to the work is centered at an enlargement magnification corresponding to its diameter.
The gist of the present invention is to select a camera from among the plurality of centering cameras, take an image, and analyze the image to detect the center of the perforation mark. In a second aspect, a plurality of centering cameras having different magnifications of lenses are installed in a camera unit installed adjacent to the punching unit or the punching unit, and a reference area having a different plane area opened in the work is used. The centering camera of the magnification corresponding to the diameter of the hole
The gist of the present invention is to select one of the plurality of centering cameras, take an image, and analyze the image to detect the center of the reference hole.

According to the above technical means, the following effects are obtained. According to the centering method of the present drilling machine, a centering camera having an enlargement magnification for picking up a perforated mark and a reference hole with just the plane area thereof is selected and imaged. Is detected (centered). This centering (center detection) is defined as teaching, and at the time of centering (teaching), the punch shape is input to a control unit that moves and controls the work so that the perforated mark is located immediately below the corresponding punch. In addition, instead of performing centering at the time of teaching as described above, the centering (center detection) may be performed at the time of actual operation under the program control of moving the punching mark from the reference point and punching. The present invention may be applied to a case where a unit having a camera unit and a punching unit performs centering (center detection) by controlling and moving in the X-axis direction and the Y-axis direction. In this case, after centering, the work is fixedly fed to the position directly below the punch at a fixed distance from the centering camera, or the punch is fixedly sent to the punch at a fixed distance from the centering camera, and Position the punch on top and pierce each. In any case, highly accurate centering (center detection) can be performed regardless of the diameter of the perforated mark or the diameter of the hole. Therefore, the center of the centered (center detected) perforated mark or the reference hole can be accurately aligned with the punch axis.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of a centering method for a drilling machine according to the present invention. In this embodiment, a plurality of centering cameras a1, a2, a having different magnifications of lenses are provided in a camera unit A adjacent to the punching unit B.
An example in which 3, a4, a5, and a6 are installed is shown.

This camera unit A is set adjacent to a punching unit B provided with a punch b on the machine base 1 and is set on the same machine base 1. The side view of the camera unit A is the same as that of the punching unit B. It has a substantially U-shape in the lateral direction having a work W loading space 100 in the middle.

In this camera unit A, a plurality of centering cameras (specifically, CCD cameras) a1, a2, a3, a4, a having different magnifications of lenses are provided in the upper half A 'thereof.
5 is mounted in a penetrating manner so that the lens directly faces the work W.

The magnification of the lens is, for example, for an object having a diameter of 5 mm, an object having a diameter of 4.0 mm, an object having a diameter of 2.5 mm, an object having a diameter of 1 mm, and an object having a diameter of 0.5 mm. , For objects with a diameter of 0.1 mm, etc.
The perforation mark w having a diameter is determined by moving the work W itself mechanically or artificially from the reference point for sending out the work W to the position immediately below the centering camera a1 for an enlargement magnification of 5 mm. Similarly, the piercing mark w is moved to a position immediately below the centering camera a2 for the enlargement magnification of 4.0 mm, and similarly, each of the piercing marks w is moved to the centering cameras a3, a4, a5, and a6 having the enlargement magnification corresponding to the diameter. W is moved from the transmission reference point, an image is taken, and the image is analyzed to detect (center) the center of each perforation mark w.

Centering cameras a1, a2, a3, a4, a
The resolution of 5, a6 is constant. More specifically, the same or similar pixel area range of a pixel memory that binarizes and temporarily stores the data by an image processing device (not shown) associated with the centering cameras a1, a2, a3, a4, a5, and a6. , A hole mark image having a diameter of 5 mm, 4.0 mm, 2.5 mm, 1 mm, 0.5 mm, or 0.1 mm can be searched and centered. Actually, it is displayed on a monitor (not shown), and the display is searched from the center of the XY cursor to detect the center of the perforated mark w.

At the time of teaching for centering, a punch shape having a diameter and a shape corresponding to the perforation mark w is input to a control unit (not shown).

A control unit (not shown) controls the centering cameras a1, a2, a
Calculate the moving distance in the X-axis direction and the Y-axis direction necessary to move the perforated mark w to the corresponding punch b, which is a fixed distance from 3, a4, a5, a6. After the mark w is moved to the position immediately below the corresponding punch b, a program for driving the punch b is stored. Therefore, the centering of the drilling marks w of 5 mm diameter, 4.0 mm diameter, 2.5 mm diameter, 1 mm diameter, 0.5 mm diameter, 0.1 mm diameter can be performed with high precision, and the drilling precision is greatly improved together with teaching work. I do.

The centering cameras a1, a2, a3, a
4, a5 and a6 can be freely provided in the punching unit B having the punch b, and although not shown, the present invention is directed to centering cameras a1, a2, a3, a4, a5 and a6.
After moving a part that is a predetermined pitch away from the hole to the corresponding punch b, which is at a fixed distance to the punch, the plane area opened in the work at the time of the centering of the control system for driving the punch b ... The centering cameras a1, a2, a3, a4, and a5 having suitable magnifications among the centering cameras a1, a2, a3, a4, and a5 having different magnifications are provided for different reference holes.
Is selected, an image is taken, and the centering method of detecting the center of the reference hole by image analysis is also included.

The enlargement magnification of each centering camera is not limited to the diameter of the hole mark and the reference hole in the embodiment, and the enlargement magnification is further subdivided to install a large number of centering cameras. Each centering camera can be freely selected and used, and the number of centering cameras can be reduced according to the size of the drilling mark of the workpiece or the size of the reference hole (two to four types having different magnification ratios). Is also free.

[0016]

According to the present invention, at the time of centering, a perforated mark or a reference hole is imaged by a centering camera having a magnification which magnifies the plane area of the hole and the image is analyzed, and the centering is performed. Therefore, accurate and speedy centering can be performed. Therefore, it is extremely easy to catch a small-diameter drilling mark or hole, so that the centering operation is simplified, and high-precision drilling can be promised regardless of the diameter of the drilling mark or the diameter of the hole.

[Brief description of the drawings]

FIG. 1 is a perspective view of a drilling machine for performing a centering method.

FIG. 2 is a monitor screen showing a state where the center of gravity is being measured.
(A), (b), (c), and (d) show monitor screens for measuring the center of gravity.

[Explanation of symbols]

A: Camera unit a1, a2, a3, a4, a
5, a6: Centering camera W: Work
w: Perforation mark B: Punching unit
b: Punch

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23Q 17/22 B23Q 17/24 B26D 5/34 B23B 49/00

Claims (2)

(57) [Claims] 1. A camera unit installed adjacent to a punching unit or a plurality of centering cameras each having a different magnification of a lens installed in the punching unit, and each of the perforations having different plane areas provided on a workpiece. The mark ,
A plurality of centering cameras with an enlargement magnification corresponding to the diameter
A centering method for a drilling machine, wherein a centering of a drilling mark is detected by selecting an image from a plurality of centering cameras , analyzing the image, and detecting the center of the drilling mark. 2. A camera unit installed adjacent to a punching unit or a plurality of centering cameras each having a different magnification of a lens is installed in the punching unit, and a plane having different plane areas opened in a workpiece is provided. the pores of the use,
A plurality of centering cameras with an enlargement magnification corresponding to the diameter
A centering method for a drilling machine, wherein the centering method is performed by selecting an image from a plurality of centering cameras, capturing an image, and analyzing the image to detect the center of a reference hole.