JPH0621700A - Inspecting apparatus for mounting line - Google Patents

Abstract

PURPOSE:To not only decide propriety of a component and to effectively and rapidly decide an operating state of a mounting machine in a previous process. CONSTITUTION:The inspecting apparatus has a mounting inspecting unit on a mounting line, receives a work 9 manufactured in a mounting unit of a previous process 6 to inspect propriety of the unit of the work 9, and comprises an absolute criterion A having a predetermined acceptance range for deciding propriety of a mounting state in the inspecting unit 7, a line monitoring reference L of a narrower range than the acceptance range of the criterion A therein, and previous process operating state deciding means 10 for judging the operating state of the unit of the process 6 based on inspection data out of the range of the reference L.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection device for a mounting line such as an electronic parts mounting line.

[0002]

2. Description of the Related Art In recent years, electronic components mounted on a printed circuit board have been made into chips and tend to be miniaturized. Accompanying this, it has become difficult to manually perform a quality inspection of electronic component mounting. The object of the quality inspection of the electronic component mounting includes the quality inspection of the solder paste printing state and the mounting state of the electronic component, and for example, conventionally, the following inspection device is used to inspect the solder paste printing state. is there.

In the system shown in FIG. 3, the board 2 sent from the previous step (cream solder printing machine) 1 is inspected by the mounting inspection machine 3 for its mounting state. The non-defective products are sent to the substrate stocker 5, respectively.

At this time, the mounting inspection machine 3 measures the area of the cream solder and the like (in the case where the previous step is an electronic component mounting machine, the mounting position, etc.), and the absolute judgment standard preset as shown in FIG. Based on A, those in the acceptable range are good (shown in g), and those outside the range are defective (shown in b).
To determine.

[0005]

However, in the above-mentioned conventional example, the mounting inspection machine 3 is a non-defective product based on the absolute judgment standard A,
Since only a defective product is determined, it is difficult to understand what the working situation of the mounting machine in the previous step 1 is, and to predict the dangerous state.

As a method for dealing with such a problem,
A person skilled in the art may easily think that the work status of the mounting machine in the previous step 1 is determined based on all the data measured by the mounting inspection machine 3 and the previous step 1 is monitored. However, in the case of this method, it takes time to process all the data, and there arises a problem that, for example, the timing of issuing the danger prediction information to the preceding process is tactually in time.

[0007]

In order to solve the above-mentioned problems, the present invention arranges a mounting inspection machine on a mounting line, receives a work produced by the mounting machine in the previous process, and mounts the work. In the inspection of the quality of the machine, the mounting inspection machine is provided with an absolute judgment standard having a predetermined pass range for judging the quality of the mounting state, and line monitoring within a narrow range within the pass range of the absolute judgment standard. It is characterized in that a standard is provided and a pre-process work status judging means for judging the work status of the mounting machine in the previous process is provided based on the inspection data outside the range of the line monitoring standard.

[0008]

According to the present invention, in addition to the absolute judgment standard for judging whether the product is a good product or a defective product, the line inspection standard for judging the working condition of the mounting machine in the previous process is provided in the mounting inspection machine. The work status of the mounting machine in the previous process can be determined based on the inspection data that is outside the line monitoring standard range (outside the pass range).

Therefore, it is possible to judge that the working condition of the mounting machine in the previous process is defective, for example, when the frequency number becomes a certain value or more according to the inspection data outside the range of the line monitoring standard, or the inspection is performed. Based on the data, the work accuracy of the mounting machine in the previous process can be specifically grasped, and the risk prediction data for the mounting machine in all processes can be obtained.

Further, since the above-mentioned risk prediction data is not obtained by processing all the inspection data but only by processing the inspection data outside the range of the line inspection standard, the judgment in a short time is possible. , Processing becomes possible.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, 6 is a mounting machine in the previous step, 7 is a mounting inspection machine, 8 is a mounting machine in the next step, and these are arranged on the mounting line. The board (work) 9 processed by the mounting machine in the previous step 6 is inspected by the mounting inspection machine 7 for the quality of the mounted state, and a good product is sent to the next step 8 and a defective product is sent to a board stocker or the like.

As shown in FIG. 2, the mounting inspection machine 7 is provided with an absolute judgment standard A having a predetermined acceptance range for judging the quality of the mounting state, and within the acceptance range of the absolute judgment standard A. A line monitoring standard L in a narrower range than the address is provided.

For example, when the mounting machine in the previous step 6 is a cream solder printing apparatus and the inspection object is the cream solder area, the absolute judgment standard A is in the range of S _{1 to} S ₄ , and the line monitoring standard L is. , S _{2 to} S ₃ are set (S ₁ <
S ₂ <S ₃ <S ₄ ... cream solder area).

The mounting inspection machine 7 is based on the absolute judgment standard A,
Those that are within this acceptable range are judged to be non-defective (indicated by g ₁ and g ₂ ), and those that are out of this range are determined to be defective (indicated by b). Send to.

Further, the mounting inspection machine 7 is subjected to the preceding process based on the inspection data (the one indicated by g ₂ corresponds to this) outside the line monitoring standard L and within the acceptance range of the absolute judgment standard A. Pre-process work status determination means 10 for determining the work status of the mounting machine 6 is additionally provided. Only the inspection data indicated by g ₂ is stored and saved by the determination means 10 (see FIG. 1).
And the work status of the mounting machine in the previous step 6 is determined based on these data. For example, when the occurrence frequency of the inspection data indicated by g ₂ becomes higher than the predetermined frequency, the danger prediction information (indicated by q in FIG. 1) is sent to the previous step 6 and the work status of the previous step 6 needs to be checked and corrected. It is possible to inform and prevent defective products from occurring. Also, based on the inspection data indicated by g ₂ , what kind of tendency the working condition of the mounting machine in the previous step 6 is (for example, solder bleeding or blurring) and how accurate it is, it is appropriate. It can be used as useful information in taking various kinds of processing.

In the preceding process work status judging means 10, g ₂
Since only the inspection data indicated by is handled, it is possible to process and judge in a short time. For example, risk prediction information (q)
Based on the above, even when the mounting machine in the previous step 6 is to be stopped urgently, it is possible to make a tact in time.

In the above embodiment, the front-step work status judging means 10 handles only the inspection data indicated by g ₂ , but in addition to this, it also operates so as to handle the inspection data indicated by b. be able to. Further, although a single line monitoring reference L is provided in the above embodiment, it is possible to provide a plurality of line monitoring references L.

[0019]

According to the present invention, it is possible to provide an inspection device in a mounting line which can not only judge whether a product is a good product or a defective product but also accurately and quickly judge the working condition of the mounting machine in the previous process. .

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a view showing the inspection standard.

FIG. 3 is a diagram showing a conventional example.

FIG. 4 is a view showing the inspection standard.

[Explanation of symbols]

 6 Pre-process 7 Mounting inspection machine 9 Work (board) 10 Pre-process work status judging means A Absolute judgment standard L Line monitoring standard

Claims (1)

[Claims] 1. A mounting inspection machine is arranged on a mounting line, receives a work produced by the mounting machine in the previous process, and inspects whether the mounting machine of the work is good or bad. With an absolute judgment standard having a predetermined pass range for judging, the line monitoring standard within a narrower range within the pass range of the absolute judgment standard is provided, and based on inspection data outside the range of the line monitoring standard, An inspection device in a mounting line, comprising a pre-process work status judging means for judging a work status of a mounting machine in a pre-process.