JPH0419006A - Processing method and device - Google Patents

Abstract

PURPOSE:To make constant pitch processing effectively despite dispersing inter- mark distance by holding two processing parts at a specified distance, sensing two marks on a work to be processed, determining the specified positions, and performing automatic processing simultaneously. CONSTITUTION:On a table 30 a printed circuit board is placed and fixed, and marks are positioned facing cameras 43, 45, and the deviation at the time is calculated. An aligning machine 20 is controlled, and the table 30 and printed circuit board are are moved in a single piece, and after the mark face center is put identical to a fixed point in the view field of the cameras 43, 45, the intended processing is conducted by two processing parts 44, 46. In case the mark pitch is provided with dispersion, the face center of one mark is put identical to the fixed point in the view field of one of the cameras if the weight of one mark is greater than the other, and alignment of single sided referencing is made so that the face center of the other lies on the line tying the fixed points in the view fields of the two cameras 43, 45. If the weights of two marks are the same, aligning shall be made so that the face centers of the two marks present the same dislocation from respective fixed points - i.e., such aligning as distributed evenly about the center.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a method for marking at least two machining locations on a workpiece that is marked at a machining location or at a position spaced apart from the machining location by a predetermined distance. The present invention relates to a device that detects marks based on marks and simultaneously performs processing.

There are various types of conventional machining techniques, such as drilling, tapping, and inserting bottles into holes, but all of them require alignment between the machining location of the workpiece and the machining part of the processing machine prior to machining. It is.

The second positioning can be performed manually while monitoring the mark attached to the processing area using a magnifying monitor, but this requires skill and is inefficient.

To solve this problem, it is possible to adopt an automatic alignment method. In other words, a CCD camera that detects the mark position on the workpiece as an image output is prepared as a substitute for the human eye, and a processing machine is placed opposite the camera across a space, so that the camera and processing machine are integrated. Join. Then, a table to place the workpiece is placed between the camera and the processing machine,
The above integrated camera and processing lf! Alternatively, either one of the tables can be made movable by integrally connecting it with a matching machine that performs fine movement control according to the image output of the camera. In this way, the mark on the workpiece placed on the table is converted to the image output of the camera and taken out, and the face center of the mark is detected by, for example, performing binarization and face center calculation. Next, an alignment machine is used to align the machined part or As a result of controlling the position of the workpiece, the processing section is automatically brought to face the center of the face of the mark on the workpiece, and processing is performed in this state.

The above is a case where processing is performed at one location on the workpiece, but in the case of a workpiece such as a printed circuit board, it is necessary to drill holes at at least two points, for example, for inserting a slot.

This case is also basically the same as above, and after machining at one location, the workpieces are aligned by the distance between the marks, and then the same alignment and machining operations as above are repeated and drilling is performed.

Problems to be Solved by the Invention As described above, the method of automatically determining the face center of each mark one by one and matching the position of the mark with the position of the processing part for processing is as follows.
Although it is more efficient than manual operation, it is still not sufficient.

In addition, for workpieces such as printed circuit boards mentioned above, marks indicating processing locations are formed by printing, but the distance between the marks may not necessarily reach a predetermined value due to thermal deformation of one or both of the board and printing plate. However, it may vary. In the conventional technology, in this case as well, machining is performed faithfully to the center of the face of each mark, and as a result, variations in the distance between the two marks remain.For example, when the machining location is a guide bottle insertion hole, etc., there are two cases in which the bottle cannot be inserted.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an apparatus that can simultaneously perform machining at a plurality of predetermined locations separated by a predetermined distance based on two points among the plurality of processing locations. In other words, the present invention is an apparatus for simultaneously performing machining on at least two machining locations of a workpiece having marks attached at a plurality of machining locations or at positions spaced apart from the machining locations by a predetermined distance. , a processing machine having at least two processing sections arranged at a predetermined interval, a table disposed opposite to the processing section on which a workpiece is placed, and a table integrally coupled with the processing machine and configured to hold a workpiece. It consists of a shared or separate camera for detecting each mark, and an alignment machine in which one or both of the imaged processing machine and camera or the table are coupled to perform fine movement control according to the camera output. .

Note that the processing parts of the processing machine are fixed at a predetermined distance apart, and when processing something at a different distance from this, adjust the distance according to the type of workpiece before fixing the machine. will be carried out.

In more than just the operation, when the workpiece is placed on the table, image output corresponding to the two marks is detected by the camera, and its face-centered coordinates are calculated.

In addition, if the two marks are within the field of view of one camera and there is no problem with the accuracy of face center calculation, one camera can be shared; in other cases, images are output using separate cameras. Take out. Based on this image output, the coordinates of the center of the face of each of the two marks based on the camera field of view are determined, and based on this, the table (workpiece) connected to the alignment machine, the processing W1, or both are controlled. Each mark face center and each processing part are made to face each other, and processing is performed in this state.

In addition, if the distance between the face centers differs from the distance between the machined parts due to printing misalignment of marks, etc., the line connecting the mark face centers and the machined part can be connected by the same alignment as described above. However, in the second state, there is a misalignment between the center of the mark face and the opposing position of the processed part. Therefore, if one of the two marks can be used as a reference, the alignment machine will perform alignment to match the face center of that mark with the processed part of one, and the weight of both marks as the reference will be equal. In the case of , the deviation is distributed to the center, and then processing is performed.

In FIG. 1.2 showing the front and side views of the 1-sho embodiment, there is no alignment on the base 10. ! The base of the alignment fi 20 is fixed, and the alignment 8! 20 has a movement control unit in two orthogonal XY directions (left and right directions of the page and directions orthogonal to the page) and the θ direction (C rotation direction), and The lower surface of a table 30 on which a workpiece is placed is integrally fixed onto two pillars 21 and 22 that project upward. At the rear of the alignment W120 (to the left in FIG. 2), the base 1
The base of a support 40 is fixed on the support 40.
is the same configuration on the left, masonry two supports 41.42 (but 42
is not shown. In FIG. 2, supports 41 and 42 are omitted to avoid complication of the drawing. The rear end of each arm is integrated by a connecting member, and the overall side surface shape is shaped like this. A left camera 43 and a left processing section (drill in this example) 44 are fixed to the upper and lower arm ends of the left support 31, respectively, and the imaging surface and the processing blade section are opposed to each other with the table 30 in between. are doing. Similarly, a right camera 45 and a right processing section 46 are fixed to the upper and lower arms of the right support 42 (not shown) at a predetermined distance to the right, respectively, and take images with the table 30 in between. The surface and the processing blade portion thereof face each other.

In addition, in the table 30, each of the processing parts 44.4
Through-holes are drilled in a part of the daple facing 6 and other necessary parts, and the processed parts 44 and 46 are formed during processing.
The processing knife is made to protrude from the top of the table. In addition, the 8 images from the left and right cameras 43 and 45 are introduced into a processing section (not shown), where they are subjected to binarization processing, face center calculation, and deviation calculation processing, and the deviation signals are sent to the matching machine 20. It is added as a movement control signal in each direction of XYθ.

The processing for the above items is carried out as follows.

For example, in the case of drilling guide holes for inserting guide pins at two predetermined positions on a workpiece made of a printed circuit board, marks are printed in advance on the printed circuit board at predetermined positions corresponding to the guide hole pitch. Also, the processing section 44
．． 46 (cameras each integrated with them 43.45
) are adjusted so that their spacing is the same as the predetermined guide hole pitch.

First, a printed circuit board is placed on the table 30 and fixed by a clamp W1 structure (not shown). As a result, each mark faces the camera 43.45, and the deviation (
The deviation of the mark face center from a predetermined fixed point within the camera field of view is calculated, and based on that, the alignment 19120 is controlled by the control I.
As a result, the table 30 and the printed circuit board are moved together, the center of the mark surface is aligned with a fixed point within the field of view of the camera, and processing is then performed by the processing sections 44 and 46.

The above is a case where the mark pitch completely matches the guide hole pitch, but there may be variations in the mark pitch. In this case, if the weight of one mark is larger than the other, the face center of one mark should match the fixed point in the field of view of one camera, and the face center of the other mark should match the fixed point in the field of view of both cameras. The one-sided reference is aligned so that it is located on the connecting line.

Furthermore, if the weights of both marks are equal, alignment, that is, alignment of center distribution, is performed so that the center of the faces of both marks have the same deviation from each fixed point.

In the above embodiment, the camera and the processing section are placed one above the other, but the same effect can be achieved even if the positions of the two are swapped.Also, the camera and the processing section are placed on the same side, either above or below, and the position is adjusted after alignment. The same effect can be achieved by moving the two by a certain amount of positional deviation and performing the processing, or by printing alignment marks on the workpiece itself in advance with the alignment marks shifted by the distance between the camera and the processing part. The same goes for In addition, in the above embodiment, the alignment machine is integrated with the table to control the movement of the workpiece, but conversely, the integrated camera and processing section are combined with the alignment machine to control the movement. The same effect can be obtained even if both are combined with different matching machines. In addition, in the above embodiment, separate cameras were placed to face each mark at two locations, but if the mark positions are close and imaging is possible within the field of view of one camera,
For example, the same effect can be achieved by aligning the marks so that the center of the face of each mark is located at two predetermined points on a coordinate system defined within the field of view of the camera.

The effects of the invention are as described above, and the present invention maintains at least two processing parts at a predetermined immediate separation, detects two marks on the workpiece to determine their predetermined positions, or removes the marks as necessary. Since the gaps in the distance are automatically processed at the same time based on one side and in the centrally distributed position, work efficiency can be significantly improved, and processing is always performed at constant intervals regardless of variations in the distance between marks. Therefore, it does not cause any hindrance to subsequent processes.

[Brief explanation of the drawing]

FIG. 1.2 is a front view and a side view, respectively, showing an embodiment of the present invention. 20: Aligning machine 30; Table 43.45: Camera 44.46: Processing section

Claims (1)

[Claims] 1. A device that simultaneously processes at least two processing points on a workpiece with marks placed at multiple processing points or positions spaced apart from the processing points by a predetermined distance. a processing machine having at least two processing sections, a table disposed opposite to the processing section and on which a workpiece is placed, and a shared table that is integrally coupled with the processing machine and detects each mark on the workpiece. Alternatively, a processing device comprising separate cameras and an alignment machine that is coupled to either or both of the integrated processing machine and camera or the table and performs fine movement control according to the camera output.