JPS61102507A - Measurement inspection system - Google Patents

Abstract

PURPOSE:To perform measurement and inspection of a worked product continuously without interruption of the line loading of a work by picking an image of the worked product during the line loading and comparing it with a reference picture. CONSTITUTION:The reference picture of a reference product is sent out via a circuit between a N/C device 11 and a measuring instrument. These NC data are inputted to a frame memory 9 via CPU 13 and picture information based on N/C data is stored. A CCD line sensor 1 is provided on a load line of the work W of a working machine such as a sheet metal machine and picture information of the worked product is stored in a frame memory 7 via a driving circuit 3 and a timing circuit 5 by the video signal taking-in command from CPU 13. Picture informations of memories 3, 7 are compared with a comparator 15 and the quality of the worked product is discriminated with CPU 13. Accordingly, the measurement and inspection of each worked product can be performed one by one without interruption of the line loading.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a measurement and inspection system that measures and inspects a product processed by a processing machine, such as a sheet metal processing machine equipped with an NC device.

[Technical Background of the Invention and Problems Therewith] Conventionally, in general, product inspection after the completion of processing work, such as in a sheet metal processing machine equipped with an NC device, involves an operator measuring product dimensions using a measuring device such as a caliper. This can be done by oneself, or by taking the product out of the processing machine and setting it on a measuring device at another location, and then inspecting the product dimensions using a touch sensor method using a measuring probe. In addition, in the case of machine tools such as machining centers that have an automatic tool changer (ATC), after machining is completed, the tool is replaced with a measurement probe while the workpiece is set on the table, and the machined product is measured and inspected. be.

However, with the first two measurement and inspection methods, when a large number of products are processed continuously, it is difficult to perform measurement and inspection for each product one by one. The procedure involved randomly extracting samples, subjecting them to statistical processing, and conducting product inspections. It was also difficult to inspect the product immediately after finishing the processing. On the other hand, in the third measurement and inspection system, the measurement and inspection of the processed product is performed every time the product processing is completed, so there is a problem that it cannot be used when a large number of products are processed continuously.

[Purpose of the Invention] The present invention has been made in view of the above-mentioned conventional problems, and provides a measurement and inspection method that enables continuous measurement and inspection of two products during line loading of workpieces. It serves the system.

[Summary of the Invention] This invention includes an input device for a reference image of a product, a device for recording it, a device for capturing an image of a processed product, a storage device thereof, and a device for recording a reference image of a processed product by comparing video data from both of the storage devices. This is a measurement and inspection system that does not include a comparison device to determine whether the product is good or bad.It takes an image of a processed product during line loading of a workpiece, and compares it with a reference image to determine whether the product is good or bad.

[Embodiment of the Invention] FIG. 1 shows an embodiment of the invention. The CCD line sensor 1 is installed on the load line of a workpiece W, such as a sheet metal processing machine, and is connected to a frame memory 7 through a drive circuit 3 and a timing circuit 5.
Sends the product video signal to the system and converts it into two values.

The system also includes another frame memory 9, N
A video signal of a reference product input through the CC input purchase 11 and the CPU 13 is stored.

The video signal from the frame memory 7.9 is sent to the comparator 15.
The comparison signals are processed by the CPU 13, and the quality of the processed product is determined.

The video 1g stored in the frame memory 7.9 can also be monitored by the video monitor television 21 through the switching circuit 17 and one timing circuit under the control of the CPU 13.

It drives the rollers to feed the CPU 13.
The operation is controlled by a signal from the timing circuit 25 and the amplifier circuit 27.

The CPU 13 communicates with the NC device of the separate machining unit using contact signals through the contact input circuit 29 and the contact output circuit 31, which will be described later, and performs line sensing every time the machining unit ff1l+ completes product machining.

The operation of the groove bottom measurement and inspection system will be explained next. FIGS. 2 and 3 show flowcharts. First, a line connection is made between the NC device 11 and the measuring device for sending the reference image of the reference product, and then the NC and data are sent. The line is disconnected. (Step 5l-
53) Thereafter, the measuring device causes the frame memory 9 to generate a reference image based on the obtained NC data. (
Step 54) When the sheet metal processing machine finishes processing the product, the NC device 11
A signal indicating the completion of machining is given to the measuring device. (Step 55) The CPIJ 13 in the FA issues a command to the CCD line sensor 1 to take in a video signal, and causes the frame memory 3 to store information on both edges of the processed product. Subsequently, the image information from the frame memory 3.9 is compared, and the CP
At U13, the quality of the processed product is determined. (Step 56゜Here, if the difference between the processed product and the reference product is too large and exceeds the allowable range, the processed product is considered defective and is notified to the operator by an alarm or other warning means. If the product is found to be in good condition, an acceptance signal and other signals are generated to determine that the product is in good condition.

In this way, the CCD line sensor 1 installed on the load line of the workpiece W captures the image information into the frame memory 3 each time a processed product passes, and compares it with the image data of the reference product to determine whether the product is good or bad. It is. Therefore, each processed product can be measured and inspected one by one without interrupting line loading.

Effects of the Invention This invention compares the image information of a processed product with the image information of a reference product and performs measurement inspection, so a CCD line sensor or other image capturing means for the processed product is installed on the load line of the workpiece. If installed, there is an advantage that each processed product can be measured and inspected accurately.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of the present invention, and FIGS. 2 and 3 show operational flowcharts p-1 to p-1 of the embodiment. 1... CCD line pincer, 7... frame holder 1
ノ, 9... Frame memory, 11... NCH placement, 1
3...CPU.

Claims (1)

[Claims] A measurement device comprising a product reference image input device and its storage device, a processed product image collection device and its storage device, and a comparison device that compares the video data from both storage devices and determines the quality of the processed product. Inspection system.