JP2001217600A - Component mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a component mounting device wherein appropriateness in kind, orientation, supply position, and the like of a component supplied from a supply part is confirmed before it is mounted, for preventing attaching error of a supplied component, defective sucking, defective article, and the like. SOLUTION: There are provided an imaging means 41 for imaging a component supplied from a supply part, a component registering means 42 where the image data for various reference components is stored in advance, a supplied component information storage means 43 where an image data for a component actually supplied from the supply part at operation is stored, a deciding means 44 where the image data at operation stored in the means 43 is compared to a corresponding reference image data stored in advance in the component registering means 42 for collation and judgement, and a control means 45 for controlling the operation state of the mounting device according to the deciding result by the deciding means 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component mounter for holding a component supplied from a supply unit and mounting the component on a mounted member.

[0002]

2. Description of the Related Art Conventionally, a head unit capable of moving up and down and rotatably mounted on a head unit movable over a component supply unit such as a tape feeder and a printed circuit board positioned at a predetermined working position is provided. 2. Description of the Related Art There is generally known a component mounter which sucks an electronic component and mounts the component at a predetermined position on a substrate.

[0003] In this type of component mounting machine, the type of components supplied from the supply unit is determined in advance in order to prevent a worker from mounting a wrong feeder cassette in the supply unit and generating a large number of defective products. Some methods take a check before implementation.

[0004] As a confirmation method, for example, an electronic component maker or a component packing maker reads an electronic code such as a barcode or a two-dimensional code attached to an electronic component assembly such as a feeder cassette by a reader. There is an electronic component assembly that determines whether or not an electronic component assembly is a component that is scheduled in advance as a mounting target (conventional example 1).

As another checking method, a measuring unit for measuring the characteristics of electronic components is provided, and the characteristics of the electronic components are measured using the measuring unit to specify the electronic components. There is one that makes the same determination as in (Example 2).

[0006]

However, since the above-described method of checking the prior art 1 can be applied only to an electronic component assembly to which an electronic code is attached, the applicable range is limited to a specific electronic component. Problem. In addition, since it is not possible to check the direction of the components supplied from the supply unit or the defect in the supply position, it is not possible to prevent the occurrence of defects due to these. Specifically, for example, a large number of defective products are generated due to the wrong direction of the components when taping the components of the tape feeder, or the supply position of the components is determined due to individual differences between tape reels. There is a possibility that problems such as frequent occurrence of suction failure due to deviation from the expected position may occur.

[0007] In the above-described method of confirming the second conventional example, it takes a long time to recognize a component. In addition, in the case of using a normal measurement unit, the applicable range is limited to a specific electronic component such as a small chip. There is a problem. On the other hand, it is conceivable that the measuring unit can be adapted to many kinds of components, but in this case, the measuring unit becomes large and expensive. Further, similarly to the first conventional example, it is not possible to confirm the direction of the component supplied from the supply unit or the defect of the supply position, so that it is not possible to prevent the occurrence of the defect due to these.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to confirm whether or not the type, direction, supply position, and the like of a component supplied from a supply unit are appropriate before mounting the component. Incorrect mounting of supply parts in the supply unit,
It is an object of the present invention to provide a component mounter capable of preventing defective suction, defective products, and the like.

[0009]

In order to solve the above-mentioned problems, a component mounter of the present invention holds a component supplied from a supply unit and mounts the component on a member to be mounted. Imaging means for imaging a component to be performed, component registration means for previously storing image data of various reference components,
Determining means for comparing image data obtained by imaging the component actually supplied from the supply unit during operation by the imaging means with corresponding reference image data stored in advance in the component registration means; Control means for controlling an operation state of the mounting machine in accordance with a result of the determination by the determination means.

[0010] According to this configuration, the image data of the component actually supplied from the supply unit during operation is compared with the corresponding reference image data stored in advance in the component registration means for collation determination. This makes it possible to check the suitability of the type, direction, supply position, and the like of the component supplied from the supply unit before mounting the component, and causes an error in mounting the supplied component in the supply unit, a suction failure, and a defective product. Etc. can be prevented beforehand.

[0011] The determination means may include:
When a configuration is adopted in which at least one of a mark, a color code, and a land pattern is determined as an identification element,
The component recognition accuracy is improved, and stable determination can be performed.

[0012]

Embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 schematically show a component mounter according to the present invention. A conveyor 2 for transporting a printed board is arranged on a base 1 of the component mounter, and a printed board 3 is transported on the conveyor 2 and stopped at a predetermined mounting work position. A component supply unit 4 is arranged on the side of the conveyor 2. The component supply unit 4 includes a component supply feeder, for example, a multi-row tape feeder 4a.

Above the base 1, a head unit 5 for mounting components is provided. The head unit 5 is movable across the component supply unit 4 and the component mounting unit where the printed circuit board 3 is located, and can move in the X-axis direction and the Y-axis direction as illustrated.

That is, a fixed rail 7 in the Y-axis direction and a ball screw shaft 8 rotated and driven by a Y-axis servomotor 9 are disposed on the base 1, and a head unit is mounted on the fixed rail 7. A support member 11 is provided, and a nut portion 12 provided on the support member 11 is screwed to the ball screw shaft 8. The support member 11 has X
An axial guide member 13 and a ball screw shaft 14 driven by an X-axis servo motor 15 are provided, and the head unit 5 is movably held by the guide member 13,
A nut (not shown) provided on the head unit 5 is screwed to the ball screw shaft 14. And
By the operation of the Y-axis servo motor 9, the support member 11
The head unit 5 is moved in the X-axis direction with respect to the support member 11 by the operation of the X-axis servo motor 15 while moving in the axial direction.

The head unit 5 is provided with a head 20 for picking up components. The head 20 can move up and down in the Z-axis direction and rotate the C-axis around the central axis of the head unit 5 with respect to the frame of the head unit 5, and is driven by an elevation drive mechanism and a rotation drive mechanism (not shown). . A nozzle 20a is provided at the tip of the head 20, and a component can be sucked by supplying a negative pressure to the nozzle 20a.

Further, the head unit 5 is equipped with a camera 21 as an image pickup means for picking up an image of a component supplied from the supply section and a lighting device 22 therefor. The camera 21
The illumination device 22 includes a CCD area sensor and outputs an image signal to an image processing unit 32 of a controller, which will be described later. Is configured to provide. Camera 21 and lighting device 2
2 is arranged side by side in the Y-axis direction on the side portion of the head 20 as shown in FIG. 2, so that a component supplied from the supply unit can be imaged at the supply position.

The above-mentioned component mounter has a controller for controlling the apparatus in a comprehensive manner. The controller includes a well-known CPU that executes a logical operation, a ROM that previously stores various programs for controlling the CPU, a RAM that temporarily stores various data during operation of the apparatus, and the like. The servo motors 9 and 15 are electrically connected to the controller. The driving of each servo motor 9 and the like is controlled by the controller according to a program stored in advance, so that a mounting operation described later is executed.

FIG. 3 shows a part of a control system included in the controller. The part supplied from the supply part and its vicinity are imaged at the supply position, and the shapes of parts and packages, land patterns, marks, and colors are taken. It shows an example of the configuration of a supply part confirmation unit that confirms the type of parts by recognizing codes and the like, and confirms the supply position, orientation, posture, etc. of parts.
It includes a main processing unit 30, a camera control unit 31, an image processing unit 32, a storage unit 33, a display unit 34, and an input unit 35.

The main processing unit 30 controls the imaging of the components supplied from the supply unit and the determination and control processing based thereon based on the components, and controls the components supplied from the supply unit by the camera 21 and the vicinity thereof. In addition to outputting a control signal to the camera control unit 31 to capture an image at the supply position, the image data at the supply position during operation output from the image processing unit 32 is stored in the corresponding reference image data stored in the component registration unit in advance. Then, based on the comparison result, the supply and stop of components in the supply unit are controlled, and an error message or the like urging replacement of the component set in the supply unit is issued.

The camera control section 31 is configured to control the operation of the camera 21 and the lighting device 22 based on a control signal from the main processing section 30.

The image processing section 32 performs a predetermined process on the image signal output from the camera 21 to extract a predetermined image such as a component image from the captured image, and to convert the image data into the above-described image data. It is configured to output to the main processing unit 30.

The storage unit 33 stores the parts actually supplied from the supply unit during operation and image data at supply positions near the parts, reference image data at supply positions of various reference parts, and the like.

The display unit 34 and the input unit 35
The input unit 35 includes an RT display and a keyboard.
Is configured to input component data, a program, and the like, while the display unit 34 is configured to display when inputting component data, and to display information when a supplied component is confirmed.

FIG. 4 is a functional block diagram of the above-mentioned supply component confirmation unit. The image pickup unit 41 captures an image of the component supplied from the supply unit at the supply position, and the supply unit of various reference components at the supply position. A component registration unit for storing image data in advance; a supply component information storage unit for storing image data of a component actually supplied from the supply unit during operation at a supply position; The image data at the time of operation stored in the storage unit is compared with the corresponding reference image data stored in the component registration unit 42 in advance, and the determination unit 44 performs collation determination. And control means 45 for controlling the operation state of the machine.

Here, the processing procedure in the above-mentioned supply component confirmation unit will be specifically described with reference to the flowchart of FIG.

First, it is determined whether a new supply unit has been set in the mounting machine (step S1).
In the case of "S", the part number A is set to "0" (step S2), and if the result of the determination is "NO", the step S
It returns to the process of 1.

Next, it is determined whether the number A is a component belonging to the supply unit newly set in the mounting machine (step S3). If the determination result is "NO", the next The part number A is updated to "A + 1" to check the part (step S4), and the process returns to step S3. Step S
If the determination result of step 3 is “YES”, it is determined whether or not the reference image data at the component supply position is registered in the component registration unit 42 as a template (step S5).
If the result of the determination is "NO", the process returns to step S3 via step S4. If the decision result in the step S5 is "YES", the camera which is the imaging means 41 is moved to the upper part of the supply part (step S6), and the actual image data at the supply position of the parts is taken into the supply part information storage means 43. (Step S7) The matching means 44 performs image matching determination between the reference image data and the actual image data (Step S8), and determines whether or not the matching ratio is equal to or greater than a set value (Step S9). Is "YE
If "S", the process returns to step S4. If the determination result in step S8 is "NO", an error is displayed,
Work instructions such as prompting replacement of the parts set in the supply unit or working with parts other than the parts for which an error has been determined are performed (step S10). The mounting operation is stopped until this work is completed. Is completed (step S1
1) Return to step S5.

Therefore, it is possible to check the suitability of the type, direction, supply position, and the like of the component supplied from the supply unit before mounting the component. It can be prevented beforehand.

As described above, the component mounter of the present invention is not limited to the specific configuration of the above-described embodiment, and it is needless to say that the configuration may be modified, added, or deleted as needed.

For example, in the above description, an example is shown in which the image data and the reference image data during the operation of the parts supplied from the supply unit are captured and stored at the supply position, but the present invention is not limited to this. Instead, the image data and the reference image data at the time of driving may be captured and stored at other positions.

In the above description, an example in which the image data at the time of driving and the reference image data are directly compared for determination is shown. However, the present invention is not limited to this. By performing predetermined signal processing on an image signal output from a camera as a means, an identification element of a component may be extracted from a captured image, and collation may be determined using the identification element. In such a case, if the determination means is configured to perform collation determination of at least one of the shape, surface character, mark, color code, and land pattern of the component as an identification element, the recognition accuracy of the component is improved and stable determination is performed. It can be carried out.

Specifically, for example, a fixed resistor, a Melf porcelain capacitor, etc. are identified by a color code, and SOP, P
LCC, QFP, and the like can be identified by surface characters, marks, and land patterns on the part. Similar distinctions can be made for the other mounted components, such as multilayer ceramic capacitors, tantalum electrolytic capacitors, aluminum electrolytic capacitors, chip film capacitors, chip inductors, semi-fixed volumes, mini-mold transistors, and power transistors, according to their respective features. it can.
The recognition accuracy of the component can be further improved by weighting the component shape, surface characters, marks, color codes, and land patterns, which are the component identification elements, according to the component to be mounted.

[0034]

As described above, according to the component mounter of the present invention, the component supplied from the supply unit is imaged using the imaging means, and the image data of various components used as a reference for the component registration means is obtained. On the other hand, the image data of the part actually supplied from the supply unit during operation is stored in the supply part information storage means, and the image data during operation is stored in the part registration means in advance by the determination means. The control unit controls the operating state of the mounting machine according to the result of the comparison by comparing the corresponding reference image data with the corresponding reference image data. Can be checked before mounting the component, and it is possible to prevent improper mounting of the supplied component in the supply unit, defective suction, occurrence of a defective product, and the like.

Further, if the determination means is configured to compare and determine at least one of a shape, a surface character, a mark, a color code, and a land pattern of the component as an identification element, the recognition accuracy of the component is improved and the component is stabilized. A determination can be made.

[Brief description of the drawings]

FIG. 1 is a plan view showing the overall configuration of a component mounter according to the present invention.

FIG. 2 is a front view illustrating the periphery of a head unit of the component mounter according to the present invention.

FIG. 3 is a block diagram illustrating an example of a hardware configuration of a supply component confirmation unit in a control system of the component mounter according to the present invention.

FIG. 4 is a functional block diagram showing a supply component confirmation unit of the component mounter according to the present invention.

FIG. 5 is a flowchart illustrating an example of a processing procedure in a supply component confirmation unit of the component mounter according to the present invention.

[Explanation of symbols]

 41 imaging means 42 parts registration means 43 supply parts information storage means 44 determination means 45 control means

Claims (2)

[Claims] 1. A component mounting machine that holds a component supplied from a supply unit and mounts the component on a mounted member, an imaging unit that captures an image of the component supplied from the supply unit, and an image of various reference components. A part registration unit for storing data in advance, and comparing image data obtained by imaging the part actually supplied from the supply unit during operation by the imaging unit with corresponding reference image data previously stored in the part registration unit. A component mounting machine comprising: a determination unit that performs collation determination by using the determination unit; and a control unit that controls an operation state of the mounting machine in accordance with a determination result by the determination unit. 2. The component mounter according to claim 1, wherein the determination unit performs a collation determination on at least one of a component shape, a surface character, a mark, a color code, and a land pattern as an identification element.