JP3128413B2 - Judgment method of interference state of mounted parts - 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 checking the interference (overlap, near-miss, etc.) between mounted components and detecting errors in the mounted data when preparing mounting data for electronic components.

[0002]

2. Description of the Related Art When preparing mounting data of an electronic component mounting apparatus, a method for checking whether the mounting data does not cause interference between components is disclosed in Japanese Patent Laid-Open No. 2-5 / 1990.
No. 499, “Interference check method”
No. 36975, “Method of detecting incorrect input of mounting data” can be cited. In the former interference check method, the component mounting space on the board is approximated by a rectangle obtained by projecting the component on the XY plane, and the overlap between the rectangles is determined. In addition, only for the overlapping combination, the part is modeled in a three-dimensional shape, and three-dimensional overlapping is checked. Further, in the latter method of detecting erroneous input of mounting data, an intersection between a line segment connecting the center positions of adjacent components and a side forming the contour of the component is determined, and an intersection point between the sides intersecting the line segment is determined. To determine whether the parts overlap.

[0003]

In the former interference check method, two-stage preparation of a two-dimensional shape and a three-dimensional shape is used.
Since the interference between components and the interference between the components and the inserter head, anvil, substrate holder, etc. are determined, the determination time is long although the accuracy is high. Also, in the latter mounting data erroneous input detection method, first, an intersection point between a line segment connecting the center positions of adjacent components and a side forming the contour of the component is obtained, and then the intersection of the sides intersecting this line segment is obtained. Since the state of the parts is determined by looking at the state, the determination time becomes longer.
Furthermore, neither of them considers the component mounting accuracy or component dimensional accuracy of the component insertion device or the component mounting device, and even if it is determined that there is no overlap in the interference check result, a near miss cannot be excluded and a mounting error cannot be eliminated. In fact, some parts are over-punched or galling due to part size errors. (Here, near miss refers to a state in which the spacing between components to be mounted abnormally approaches the allowable value. In this state, errors due to mounting accuracy on the mounting device side and dimensional accuracy on the component side are absorbed. In addition, normal mounting cannot be assured for the component concerned, and galling means that when a component is mounted at a position that abnormally approaches a component already mounted, it does not overlap with the already mounted component due to the above-mentioned error or the like. Even so, it refers to a mounting operation that touches the peripheral portion and pushes it away to cause a mounting displacement.)
SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for determining an interference state in which mounting data is evaluated with respect to interference between components simply and at high speed and in consideration of mounting accuracy and dimensional accuracy.

[0004]

According to the present invention, there is provided a method for judging an interference state of a component to be mounted, which defines an allowable minimum gap between components to be mounted, defines an outer periphery of a horizontal projection figure of each component as a contour of each component, Each virtual contour is obtained by enlarging the contour by at least half of the minimum allowable gap value. Then, from the mounting position information of the mounting data, it is detected whether or not the virtual contours of the respective parts intersect with each other, and the quality of the interference state between the parts is determined based on the detection result.

[0005]

The interference state between components is evaluated only by the intersection of the virtual contours of the components enlarged by the prescribed allowable minimum gap value, and the quality of the mounting data is determined.

[0006]

An embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram of a mounting data creation device used in the present invention. Reference numeral 11 denotes an input device including a keyboard, a floppy disk drive, and the like.
It has a data receiving function. Arithmetic processing unit 12
The storage device 14 stores the mounting data input or extracted from the input device 11 in the storage device 14, and determines whether interference occurs between components to be mounted based on the mounting data, as described later. Reference numeral 13 denotes an output device such as a CRT display device, which displays a mounting position, a mounting angle, a component type, and the like of the input electronic component, and displays a component interference determination result determined by the arithmetic processing device 12. .

FIG. 1 is a flowchart showing the algorithm of the method for judging the interference state of a mounted part according to the present invention. FIG.
FIG. 4 is an explanatory diagram showing a state where parts are in an interference state. Before executing the process of the flowchart of FIG. 1, the input data to be determined from the input device 11 is input to the arithmetic processing device and stored in the data storage device. Then, the mounting accuracy of the component mounting device that performs the mounting operation based on the mounting data and the allowable minimum gap value G between the components determined in consideration of the dimensional accuracy of the mounted component are stored in the data storage device. deep.

[0008] FIG. 1 and FIG. In STEP 1 of FIG. 1, two components 2, 3 for determining the interference state from the mounting position data of the data storage device 14
Select In STEP 2, first, the size data, the mounting position, and the mounting angle data relating to the selected component are extracted from the data storage device 14. Then, from the size data, contours 20 and 30 in the plane direction of each part (contours of the figure in which the part is projected on the horizontal plane) are obtained, and these contours are half of the minimum allowable gap value G stored in the data storage device. The virtual contour lines 21 and 31 which are enlarged only are calculated. STE
At P3, it is detected whether or not the virtual contour lines 21 and 31 intersect.

STEP 4 is a step of judging intersection,
If it is detected in STEP 3 that there is no intersection between the virtual contour lines, the process proceeds to STEP 5 and the two selected components 2
And 3 do not overlap or approach each other beyond the allowable minimum gap value G, that is, they are not in an interference state. On the other hand, if it is detected that the virtual contour lines intersect,
Proceeding to STEP 6, it is determined that the parts 2 and 3 are overlapping or approaching each other exceeding the allowable minimum gap value G, that is, are in an interference state.

STEP 7 is a step of judging whether or not the interference state has been checked for all components in the mounting data to be judged. If all the combinations have not been completed, the process returns to STEP 1 to execute the above-described interference check. repeat. When all the combinations are completed, the arithmetic processing unit stops the interference check, and when there is no intersection of the virtual contour lines for all the combinations, the mounting data is regarded as having no problem regarding the interference between the components, and the output device such as a CRT or the like is used. To that effect. On the other hand, if there are intersections of virtual contour lines for some combinations, the mounting data is determined to be defective with respect to inter-component interference, and a CRT or the like as an output device displays that fact and the relevant components and their mounting positions. .

In the present embodiment, when obtaining the virtual contour of the part, the part contour is enlarged by 1/2 of the minimum allowable gap value. The component outline may be enlarged by multiplying by a coefficient. Furthermore, in the present embodiment, the enlargement value of the component outline is the same for all the components to be mounted, but it is also possible to set each separately according to the type of the component.

[0012]

According to the present invention, since the interference state between components is evaluated only by the intersection of the calculated virtual contour lines, the quality of the mounting data can be determined easily and relatively quickly. Interference between components is determined by a virtual contour that takes into account the mounting accuracy of the component mounting device that executes the mounting data and the dimensional accuracy of the component to be mounted. It is not possible to mistakenly determine that there is no defect in the case of repeatedly striking or galling.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a procedure of a method for determining an interference state of a mounted component according to the present invention.

FIG. 2 is a block diagram showing a mounting data creation device used in the method for determining the interference state of a mounted component according to the present invention.

FIG. 3 is an explanatory diagram showing a state in which parts are in an interference state in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Input device 12 Arithmetic processing unit 13 Output device 14 Data storage device 2, 3 Parts 21, 31 Virtual contour line

Claims (1)

(57) [Claims] 1. A method for determining in advance whether or not overlapping or near-miss between components occurs at the time of mounting based on the mounting data, based on mounting data indicating at which position on the board which component is to be mounted. The minimum permissible gap between the components to be defined is defined, the outer periphery of the figure obtained by projecting each component on the horizontal plane is defined as the contour of each component, and the virtual contour obtained by enlarging the contour of each component by at least half of the permissible minimum gap value is defined as Determining from the mounting position information of the mounting data whether or not the virtual contours of each part intersect with each other, and determining whether the interference state between the parts is good or not based on the detection result. Judgment method.