JP4817446B2 - Adsorption component interference determination method and adsorption component interference determination apparatus for electronic component mounting machine - Google Patents

Description

  The present invention relates to a suction component interference determination method and a suction component interference determination device of an electronic component mounting machine that sucks and mounts electronic components on a circuit board by sucking electronic components to a plurality of suction nozzles, respectively.

In an electronic component mounting machine that sucks electronic components to a plurality of suction nozzles, as shown in Patent Document 1 (Japanese Patent Laid-Open No. 2004-304120), electronic components sucked by two or more suction nozzles do not interfere with each other. It is necessary to do so. When determining the presence or absence of interference between the electronic components, as shown in FIG. 5, the rectangle inscribed by the electronic components is regarded as the component outer shape, and the component dimension variation or the electronic component mounting machine is surrounded around the component outer shape. A range in which electronic components may exist (hereinafter referred to as “component existence range”) is set by adding a margin for taking into account variations in accuracy, etc., and the component existence range of two electronic components is partially The presence or absence of interference between electronic components is determined based on whether or not they overlap.
JP 2004-304120 A

  In the conventional component existence range, the same margin is set in the X direction (horizontal direction) and the Y direction (vertical direction) with reference to a rectangle inscribed by the electronic component.

  Originally, the margin in the X direction and the margin in the Y direction should be different depending on the configuration of the electronic component mounting machine, component dimensional accuracy, positioning accuracy, etc., but conventionally the margin in the X direction and the margin in the Y direction are the same. Because it was set to a value, the larger margin had to be taken. As a result, when setting the component existence range, although the margin is originally in a small direction, it will take a larger margin than necessary, and even if the electronic components do not actually interfere with each other, There is a possibility that an erroneous determination is made that the electronic parts interfere with each other because the margin parts of the two parts existing ranges overlap.

  In addition, since the shape of the conventional component existence range is a rectangle that is larger by a margin than the rectangle in which the electronic component is inscribed, if the shape of the electronic component is not a rectangle, the component exists more than the range where the actual electronic component exists. The range is set too large. For this reason, as shown in FIG. 6, even when the electronic components do not actually interfere with each other, there is a possibility that the two component existence ranges partially overlap to make an erroneous determination that the electronic components interfere with each other.

  The present invention has been made in consideration of these circumstances. Therefore, the object of the present invention is to provide an electronic component mounting machine that can accurately determine the presence or absence of interference between electronic components attracted by two or more suction nozzles. To provide a suction component interference determination method and a suction component interference determination device.

In order to achieve the above-described object, the present invention sets the margin in the X direction and the margin in the Y direction separately in advance based on the external shape of the electronic component, and the range in which the electronic component may exist (hereinafter referred to as the electronic component). (Referred to as “component existence range”), and when performing suction component interference determination that determines whether or not electronic components sucked by two or more suction nozzles interfere with each other based on the component presence range , There is a possibility that one electronic component is divided into a plurality of elements in advance, and each element has an X-direction margin and a Y-direction margin individually set based on the outer shape of each element. An electronic component that determines a certain range (hereinafter referred to as “element existence range”) and is composed of a combination of a plurality of element existence ranges and adsorbs to two or more adsorption nozzles Whether to interfere or not is determined based on the element existence range, and when determining the element existence range, a lead row having the same length and width is handled as one element for each side of the electronic component. It is characterized by this. In the present invention, the X-direction margin and the Y-direction margin are considered in consideration of the fact that the X-direction margin and the Y-direction margin have different values depending on the configuration of the electronic component mounting machine, component dimensional accuracy, positioning accuracy, and the like. Are set to different values individually, the margin in the X direction and the margin in the Y direction can be set to the minimum necessary margins, respectively, and it is erroneously determined that the electronic components do not actually interfere with each other Can be prevented. Moreover, since the component existence range is set by adding the margin in the X direction and the margin in the Y direction on the basis of the outer shape of the electronic component, the shape of the component existence range is changed to the shape of the electronic component as shown in FIGS. It is possible to make the shape substantially similar to the outer shape, and it is possible to prevent an erroneous determination that a non-rectangular component shape in which electronic components do not interfere with each other actually interfere.

Furthermore, the present invention divides one electronic component into a plurality of elements in advance, and individually sets the margin in the X direction and the margin in the Y direction for each element based on the outer shape of each element. An electronic component that determines the range in which there is a possibility (hereinafter referred to as an “element presence range”), configures one component presence range as a combination of a plurality of element presence ranges, and is sucked by two or more suction nozzles It is characterized in that whether or not they interfere with each other is determined based on the element existence range. In this way, if one electronic component is divided into a plurality of elements and the presence / absence of interference is determined for each element, even if the outer shape of the electronic component is a relatively complicated shape, the presence / absence of interference Can be determined with high accuracy.

Furthermore, the present invention is, in determining the elements existing range, length and width for each side of the electronic components is characterized in that when handling the same lead column as a single element. In this way, the process of dividing one electronic component into a plurality of elements is easy.

Hereinafter, an embodiment embodying the best mode for carrying out the present invention will be described.
In the present embodiment, for example, a component mounting machine described in JP 2000-294990 A is used. Since the mechanical configuration of this component mounting machine may be the same as that described in the above publication, description thereof will be omitted and only the main part will be described.

  As shown in FIG. 1, a plurality of suction nozzles 1 to 12 arranged at predetermined intervals in the circumferential direction (rotation direction) with respect to a revolver type nozzle head 13 (rotating body) are assembled downward, and each suction nozzle 1 to 1 is assembled. An electronic component is attracted to 12 and mounted on a circuit board (not shown).

  In the present embodiment, the number of suction nozzles 1 to 12 is set to 12, so that a maximum of 12 parts can be sucked simultaneously (see FIG. 2). Although the diameters of the suction nozzles 1 to 12 may all be the same, suction nozzles having a plurality of types of nozzle diameters may be used according to the size of the parts to be sucked. In the present embodiment, for example, suction nozzles 1 to 12 having three types of nozzle diameters of large diameter, medium diameter, and small diameter are used, and the first suction nozzle 1 and the seventh suction nozzle located on the opposite side of 180 °. 7 uses a suction nozzle having an intermediate nozzle diameter so that medium-sized parts (for example, parts up to 10 mm × 10 mm) can be sucked, and further, a fourth suction nozzle 4 that is 90 ° apart from the first suction nozzle 1. The tenth suction nozzle 10 located on the opposite side of 180 ° uses a large-diameter suction nozzle so that large parts (for example, parts up to 20 mm × 20 mm) can be sucked, and the remaining eight suction nozzles 2, 3, 5, 6, 8, 9, 11, and 12 use a small-diameter suction nozzle so that small parts (for example, parts up to 5 mm × 4 mm) can be sucked.

  As shown in FIG. 2, if all the parts sucked by the 12 suction nozzles 1 to 12 are relatively small parts, it is possible to suck a maximum of 12 parts to all the suction nozzles 1 to 12. However, as shown in FIG. 3 and FIG. 4, when a large component (B, D, E, F) is adsorbed to the large-diameter suction nozzles 4, 10, the large component obstructs the adjacent small diameter. The suction nozzles 2, 3, 5, 6, 8, 9, 11, and 12 may not be able to suck parts.

  Each time the parts are picked up by the suction nozzles 1 to 12, the nozzle head 13 is rotated and the next suction nozzle is swung to the position (suction station) of the first suction nozzle 1 shown in FIG. The parts are picked up at the same position. After completing this part suction operation, all the parts sucked by the suction nozzles 1 to 12 are captured in the field of view of a camera (not shown), and the suction posture of each part is determined by image processing technology. Judgment and detection of missing parts are performed.

  By the way, as shown in FIG. 2, there is no problem if adjacent parts do not interfere with each other when the parts are sucked to the suction nozzles 1 to 12, but depending on the size and suction angle of the suction parts, FIG. As shown in the example of FIG. 4, adjacent suction parts (A to F) may interfere with each other. When such interference between the suction components occurs, the suction position of the components (A to F) shifts from the initial suction position and the mounting position on the circuit board shifts (the amount of shift from the initial suction position is unknown). Therefore, problems such as easy mounting failure occur.

  Therefore, in this embodiment, when the electronic components are sequentially picked up by two or more suction nozzles, it is determined whether the electronic component to be picked up interferes with other electronic components, and the electronic components interfere with each other. When the determination is made, the suction position of the electronic component to be sucked is offset-corrected in a direction that avoids component interference (in this embodiment, the outer diameter direction of the nozzle head 13).

  Conventionally, when determining the presence or absence of interference between electronic components, as shown in FIG. 5, a rectangle inscribed by the electronic component is regarded as a component outer shape, and component dimensional variations and electronic component mounting are placed around the component outer shape. The margin for taking into account machine accuracy variations is set to the same value in the X direction (horizontal direction) and the Y direction (vertical direction), and the range in which electronic components may exist (hereinafter referred to as “component existence range”) In other words, the presence or absence of interference between the electronic components is determined based on whether or not the component existence ranges of the two electronic components partially overlap.

  Originally, the margin in the X direction and the margin in the Y direction should be different depending on the configuration of the electronic component mounting machine, component dimensional accuracy, positioning accuracy, etc., but conventionally the margin in the X direction and the margin in the Y direction are the same. Because it was set to a value, the larger margin had to be taken. As a result, when setting the component existence range, although the margin is originally in a small direction, it will take a larger margin than necessary, and even if the electronic components do not actually interfere with each other, There is a possibility that an erroneous determination is made that the electronic parts interfere with each other because the margin parts of the two parts existing ranges overlap.

  In addition, since the shape of the conventional component existence range is a rectangle that is larger by a margin than the rectangle in which the electronic component is inscribed, if the shape of the electronic component is not a rectangle, the component exists more than the range where the actual electronic component exists. The range is set too large. For this reason, as shown in FIG. 6, even when the electronic components do not actually interfere with each other, there is a possibility that the two component existence ranges partially overlap to make an erroneous determination that the electronic components interfere with each other.

  Therefore, in this embodiment, as shown in FIGS. 7 and 8, there is a possibility that the electronic component exists by setting the margin in the X direction and the margin in the Y direction individually based on the outer shape of the electronic component. By determining the range (component existence range), the shape of the component existence range is substantially similar to the outer shape of the electronic component, and the margin in the X direction and the margin in the Y direction are individually set to different values. In this case, since the shape of the component existence range is substantially similar to the outer shape of the electronic component, if the shape of the electronic component is non-rectangular, the shape of the component existence range is also non-rectangular.

  Furthermore, in this embodiment, one electronic component is divided into a plurality of elements, and the margin in the X direction and the margin in the Y direction are individually set for each element based on the outer shape of each element. A range that may exist (hereinafter referred to as “element presence range”) is determined, and one component existence range is configured by a combination of a plurality of element existence ranges. It is determined based on the element existence range whether or not the electronic components sucked by the suction nozzle interfere with each other.

  In this case, when the element existence range is determined, a lead row having the same length and width is handled as one element for each side of the electronic component. In the example of FIG. 8, it is divided into seven elements ag. The positions (XY coordinates) of the elements a to g are set with the center of the electronic component as the reference position (the origin of the XY coordinates). The electronic components are not limited to those provided with lead rows on each of the four sides, but are provided with lead rows only on two opposite sides (such as SOP), and lead rows are provided only on one side. For parts (connectors and the like), a part existence range (element existence range) may be set.

  For example, as shown in FIGS. 9 and 10, when determining the presence or absence of interference between two electronic components A and B, each element existence range 1 a to 3 a of one electronic component A and each of the other electronic components B It is determined whether or not the element existence ranges 1b to 3b overlap each other. As shown in FIG. 9, if there is no overlapping element existence range, it is determined that the two electronic components A and B do not interfere with each other, and FIG. As shown, if even one overlapping element existence range exists, it is determined that the two electronic components A and B interfere.

  According to the present embodiment described above, when a margin is set around the outline of the electronic component to determine a range where the electronic component may exist (component existence range), the configuration of the electronic component mounting machine, In consideration of the fact that the margin in the X direction and the margin in the Y direction are different depending on the part dimensional accuracy, positioning accuracy, etc., the margin in the X direction and the margin in the Y direction are individually set to different values. Therefore, the margin in the X direction and the margin in the Y direction can be set to the minimum necessary margins, and it is possible to prevent erroneous determination that the electronic components do not actually interfere with each other. Moreover, since the component existence range is set by adding the margin in the X direction and the margin in the Y direction on the basis of the outer shape of the electronic component, the shape of the component existence range is changed to the shape of the electronic component as shown in FIGS. It is possible to make the shape substantially similar to the outer shape, and it is possible to prevent an erroneous determination that a non-rectangular component shape in which electronic components do not interfere with each other actually interfere.

  As a result, it becomes possible to produce even a recipe that could not be produced due to erroneous determination that there is interference between electronic components in the prior art, and the range of recipes that can be produced can be expanded. Moreover, in the electronic component mounting machine equipped with the revolver type nozzle head 13, the arrangement of the electronic components to the suction nozzles 1 to 12 can be optimized, and the electronic components can be efficiently suctioned. Production time can be shortened. Further, even an electronic component that has been erroneously determined to interfere with the conventional technology and has been forced to perform offset correction of the suction position can be normally suctioned without offset correction, and deterioration of the suction rate due to offset correction can be avoided.

In the present invention, one electronic component is divided into a plurality of elements. However , as in Reference Examples 1 and 2 shown in FIGS. 7 and 8, there is a component that is substantially similar to the external shape of the electronic component. It is also conceivable to set the range and determine the presence or absence of interference between the electronic components based on whether or not the component existence ranges of the two electronic components partially overlap.

  In addition, the present invention is not limited to the electronic component mounting machine on which the revolver type nozzle head 13 is mounted. The present invention is widely applied to an electronic component mounting machine that sucks and mounts electronic components on a plurality of suction nozzles. Can be implemented.

It is a bottom view of the nozzle head which shows one Example of this invention. It is a bottom view of a nozzle head showing a state where an electronic component is sucked by a suction nozzle. It is a bottom view of the nozzle head which shows a mode that the electronic component attracted | sucked to the suction nozzle interferes (case 1). It is a bottom view of the nozzle head which shows a mode that the electronic component attracted | sucked to the suction nozzle interferes (example 2). It is a figure explaining the setting method of the conventional margin and component presence range. It is a figure explaining the example mistakenly determined that electronic parts interfere with each other in the related art even when there is actually no possibility of interference between electronic parts. Ru Figure der explaining a method of setting the margin and the component present ranges in reference example 1 related to the present invention. Ru Figure der explaining a method of setting the margin and the component present ranges in reference example 2 related to the present invention. It is a figure explaining the example determined with no interference of two electronic components A and B. FIG. It is a figure explaining the example determined with two electronic components A and B having interference.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1-12 ... Adsorption nozzle, 13 ... Nozzle head, AG ... Electronic component

Claims (2)

In the adsorption component interference determination method of an electronic component mounting machine that adsorbs electronic components to a plurality of suction nozzles and mounts them on a circuit board,
A range in which the electronic component may exist (hereinafter referred to as “component existence range”) is determined in advance by individually setting a margin in the X direction and a margin in the Y direction based on the outline of the electronic component. When performing the suction component interference determination for determining whether or not the electronic components sucked by two or more suction nozzles interfere with each other based on the component existence range ,
There is a possibility that one electronic component is divided into a plurality of elements in advance, and each element has an X-direction margin and a Y-direction margin individually set based on the outer shape of each element. Whether a certain range (hereinafter referred to as “element existence range”) is determined, one component existence range is configured by a combination of a plurality of element existence ranges, and electronic components adsorbed by two or more adsorption nozzles interfere with each other Is determined based on the element existence range,
When determining the element existence range, a lead row having the same length and width is handled as one element for each side of the electronic component, and a suction component interference determination method for an electronic component mounting machine. In the adsorption component interference determination device of an electronic component mounting machine that adsorbs electronic components to a plurality of suction nozzles and mounts them on a circuit board,
Stores a range (hereinafter referred to as “component existence range”) in which the electronic component may exist in advance, which is obtained by individually setting a margin in the X direction and a margin in the Y direction based on the outline of the electronic component in advance Storage means for
Interference determining means for determining whether or not electronic components sucked by two or more suction nozzles interfere with each other based on the component existence range ;
The component existence range is composed of a combination of a plurality of element existence ranges by dividing one electronic component into a plurality of elements,
Each element existence range is determined by handling a lead row having the same length and width for each side of the electronic component as one element when dividing the electronic component into a plurality of elements. A margin in the X direction and a margin in the Y direction are individually set based on the outer shape.
The said interference determination means determines whether the electronic components adsorbed by two or more adsorption nozzles interfere based on the said element presence range, The adsorption component interference determination apparatus of the electronic component mounting machine characterized by the above-mentioned .

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