JP4083295B2 - Component mounting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a component mounting apparatus, and more particularly, to a component mounting apparatus in which components sequentially supplied from a component supply device such as a tape feeder at a predetermined feed amount are sucked by a suction nozzle and mounted on a substrate.
[0002]
[Prior art]
Conventionally, in a component mounting device (chip mounter) that mounts electronic components (hereinafter referred to as components) on a substrate, components that are intermittently supplied from a tape feeder (component supply device) are adsorbed by an adsorption nozzle, and are sequentially placed on the substrate. Transported and mounted. Since normal parts are not necessarily picked up in the correct posture, the picking posture of the parts is picked up by a recognition device such as a CCD camera, image recognition of the parts is performed, and the parts are displaced from the center position of the picking nozzle. After the inclination amount is corrected, the component is mounted on the board.
[0003]
[Problems to be solved by the invention]
In such a component mounting apparatus, if the feeder feed pitch is deviated, if the adsorption nozzle adsorbs the component, the deviation between the adsorption center and the component center increases and the deviation correction amount increases, or the component In some cases, the suction nozzle hits the end of the part when picking up the part, so that the suction is performed in a standing state or obliquely. In particular, when suction is performed in a standing state or at an angle, there is a problem that horizontal suction is not performed and it is difficult to recognize the suction posture, resulting in poor mounting.
[0004]
In addition, depending on the part's suction posture, a part recognition error may occur or the part will be discarded because it is determined that the part is standing, but if the cause is a pitch shift of the feeder, the cause is visually There was a problem that it was not possible to find it, and it was necessary to perform the recovery operation many times.
[0005]
Accordingly, the present invention has been made to solve such a problem, and eliminates a suction failure due to a shift in the component feed amount (pitch) of the component supply device, and ensures a correct component mounting. The issue is to provide
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, in the present invention, a component that is sequentially supplied from a component supply device at a predetermined feed amount is sucked by a suction nozzle, and the component sucked by the suction nozzle in the component mounting device that is mounted on the substrate means for detecting a deviation between the suction center and the component center of the when the detected deviation exceeds a predetermined amount, and employs a configuration having a unit that advances the feed amount 1 pitch.
[0007]
In such a configuration, since the feed amount (pitch) of the component supply device can be corrected based on the deviation between the component center and the suction center, it is possible to prevent suction failure due to pitch deviation and reduce board mounting failure. Become.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
[0009]
FIG. 1 shows a component mounting apparatus (chip mounter) according to an embodiment of the present invention. A suction head 1 having a suction nozzle 1a for sucking a component 3 supplied from a plurality of tape feeders 2 is shown. Is provided. As shown in FIG. 2, the suction head 1 is configured to move in the XY direction by an XY drive mechanism 11 driven by a control device 10 such as a CPU. The suction nozzle 1 a is configured to be able to rotate θ around the nozzle axis by the θ rotation mechanism 13.
[0010]
The tape feeder 2 takes out the tape 2a storing the components 3 to be supplied to the plurality of recesses 2b from a supply reel (not shown) and supplies the components. The teeth of the ratchet 17 that is intermittently driven by the ratchet drive mechanism 16 The parts 3 are sequentially supplied at a predetermined feed pitch by sequentially engaging 17a with holes 2c formed on the side of the tape 2a.
[0011]
When the component 3 is mounted on the substrate, the suction head 1 moves to the position of the feeder 2, and the components 3 sequentially supplied from the feeder are sucked by the suction nozzle 1 a and transported via the transport belt 4. Sequentially transported and mounted on top. Since the normal component 3 is not necessarily picked up in the correct posture, the picked-up posture of the component is captured by the component recognition camera 6 such as a CCD camera while being transferred to the substrate, and the image processing device 14 recognizes the image of the component. The component 3 is mounted on the substrate 5 after correcting the deviation and the inclination amount of the component from the center position of the suction nozzle obtained based on this image recognition.
[0012]
In such a configuration, the component mounting apparatus sequentially sucks the components 3 from the feeder 2 in accordance with the component mounting data stored in the memory 15 of FIG. 2, and sets the suction posture based on the images of the components captured by the component recognition camera 6. After the correction, the component 3 is mounted at a predetermined position on the substrate 5.
[0013]
In this component mounting, the feeding position of the feeder and the suction position by the suction nozzle are set in advance so that the suction nozzle sucks the center of the component. Since the deviation becomes large and it becomes difficult to perform horizontal suction depending on the part, the detection of the pitch deviation as shown in FIG. 3A is started.
[0014]
In this pitch shift detection, since the component 3 is sucked by the suction nozzle 1a in step S1, the recognition posture is imaged by the recognition camera 6 in step S2, and the image processing unit 14 performs image processing to recognize the center O of the component. In step S3, the distance Ly in the feed direction Y between the center O and the center (suction center) P of the nozzle is calculated. Subsequently, in step S4, it is determined whether or not the distance Ly is larger than a predetermined value, for example, 1.7 mm. If it is small, the deviation is small, so that it is determined to be normal (step S6).
[0015]
In the present invention, when such a pitch deviation occurs, an automatic return operation (recovery) as shown in FIG. 3B is performed. Step S11 shows the pitch shift detection shown in FIG. 3A, and step S12 is the same as the determination in step S4. If it is determined that a pitch deviation has occurred, one pitch of the feeder is knocked in step S13. This is done by controlling the ratchet drive mechanism 16 via the control device 10 and advancing the ratchet 17 by one extra pitch. As a result, the deviation in the Y direction is eliminated, and the component suction operation is resumed in step S14.
[0016]
In the above embodiment, the suction displacement is detected by the recognition camera. However, the laser recognition processing unit recognizes the suction posture by irradiating the suction part with a laser band instead of the recognition camera and measuring the shadow. You may make it calculate Ly.
[0017]
【The invention's effect】
As described above, according to the present invention, the feeding amount (pitch) of the feeder is corrected based on the deviation between the component center and the suction center. Defects can be reduced. In addition, the number of parts discarded due to poor suction can be reduced to reduce the loss of parts, and the system is less likely to stop due to poor recognition, improving the productivity of the board.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the overall configuration of a component mounting apparatus.
FIG. 2 is a configuration diagram illustrating a mechanism for detecting a feed pitch deviation of a feeder.
FIG. 3 is a flowchart showing a flow for detecting a feeder feed pitch deviation and a flow for automatically returning when a pitch deviation is detected.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Adsorption head 1a Adsorption nozzle 2 Feeder 2a Tape 3 Parts 6 Recognition camera 16 Ratchet drive mechanism 17 Ratchet

Claims (1)

In a component mounting device that sucks a component that is sequentially supplied from a component supply device with a predetermined feed amount by a suction nozzle and mounts it on a substrate,
Means for detecting a deviation between the suction center of the part sucked by the suction nozzle and the center of the part;
When the detected deviation exceeds a predetermined amount, and means that advances the feed amount one pitch,
A component mounting apparatus characterized by comprising:

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