Quality control device, control method thereof, and storage device

Abstract

The quality management apparatus includes: a device information acquisition unit that acquires data of a device state value indicating a state of the production facility observed when a product is processed by the production facility; and a product information acquisition unit that acquires data from products processed by the production facility The measured data of the product state value indicating the state of the product. When it is determined that a certain product is a nonconforming product, it is determined whether the product state value of the defective product is an abnormal value by comparing it with the conforming product distribution of the product state value, and the conforming product by comparing with the equipment state value The distributions are compared to determine whether the equipment status value when processing the defective product is an abnormal value, and when it is determined that the product status value and the equipment status value related to the defective product are all abnormal There is an abnormality in the production equipment.

Description

technical field [0001] The present invention relates to a technique for managing the quality of a production line. Background technique [0002] In production lines that are becoming increasingly automated and labor-saving, inspection devices are installed in the middle or final process of the production line to automatically detect defective products or classify defective products. In addition, an attempt is also made to infer the main cause of failure from the inspection results of the inspection equipment, and to make use of it in quality control and maintenance of production equipment. [0003] In such a quality management system, if the judgment criteria for inspection and the management criteria for quality are not properly set, the efficiency of the production line may decrease. The reason for this is that, for example, if the standard is too loose, it will lead to an increase in defective products, the burden of visual inspection, and the cost of discarding non-conf...

AI Technical Summary

Problems solved by technology

[0003] In such a quality management system, if the inspection criteria and quality management criteria are not properly set, the efficiency of the production line may decrease.

The reason for this is that, for example, if the standard is too loose, it will lead to an increase in defective products, the burden of visual inspection, and the cost of discarding non-conforming products. Conversely, if the standard is too strict, it will lead to increased , there will be situations where qualified products are unnecessarily excluded or the production equipment is abnormally detected by mistake, and the production line is stopped in vain due to abnormality

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