JPS6285804A - Automatic inspecting device for object to be inspected provided with punch hole - Google Patents

Abstract

PURPOSE:To process arithmetic and measurement results with higher precision by providing a teaching program generating means, an arithmetic statistical program generating means, etc. CONSTITUTION:The teaching program (TP) generating means 21 generates a TP file for teaching the storage control means 17 of a CPU 14, a measurement procedure and a measurement point and the arithmetic statistical program (EP) generating means (keyboard) 24 generates an EP files for items as to measurement results to be processed which are connected to the means 15 and arithmetic statistical processing means 18 of the CPU 14 and also generates a statistical processing program file for items necessary for the statistical processing. Consequently, the TP file is generated before automatic measurement by operating the means 21 and controlling the driving of pulse motors 6 and 7 for the movement of a mount table 2. Further, the EP file is generated by operating the keyboard 24 according to the display on a CRT 25. Therefore, an arithmetic program, etc., is used to process arithmetic and measurement results at high level.

Description

[Detailed Description of the Invention] <Prior Art> Generally, a universal projector is used for visual inspection and dimension measurement of precision machined parts (hereinafter referred to as inspected objects) provided with punched holes, such as IC lead frames. was used -C. Specifically, the object to be inspected is placed on the stage of a universal projector, the object is irradiated with light from below, the shape of the object is magnified with a zoom lens, and projected onto a screen, and the projected shape is Appearance inspection and dimension measurements were performed visually using crosshairs on a screen.

<Problems to be Solved by the Invention> In the appearance inspection and dimensional measurement of the inspected object using the conventional universal projector as described above, ■The appearance inspection and dimensional measurement use the crosshairs on the screen. This is done with the naked eye, so there is a problem with reading errors.Furthermore, various measurements are done manually, so if there are many measurement points on the object to be inspected, a large amount of measurement time is required. The problem is that it takes time to check whether the measurement results are within the tolerance range set in advance. Moreover, statistical processing of these measurement results is mainly done manually, so statistical processing is difficult. The problem is that it takes a lot of time and costs, and furthermore, due to the above problems, it is not possible to perform visual inspections and dimension measurements of many objects to be inspected within a specified time. There was a problem.

Means for Solving the Problems> In order to solve the above-mentioned conventional problems, an automatic inspection device for an object to be inspected according to the present invention has the following features: A stage that can be moved by the drive of a pulse motor, a linear scale for teaching the front and back of the measurement position of the object to be inspected, and an optical sensor for sensing the edges of the object to be inspected enlarged and projected on the screen. (b) a memory control means connected to the pulse motor of the universal projector, and an arithmetic and statistical processing means for creating an arithmetic program file and a statistical processing program file; (c) coordinates of a measurement point of the object to be inspected, the input side of which is connected to the optical sensor and linear scale of the universal projector, and the output side of which is connected to the storage control means of the central processing unit; measuring point coordinate determining means for determining the coordinates of the measuring point; A teaching program creating means, and (e) creating an arithmetic program file for the items to be calculated on the measurement results connected to the storage control means and the arithmetic and statistical processing means of the central processing unit, and for calculating the items necessary for statistical processing. (N) a calculation statistics program creation means for creating a statistical processing program file; (N) a program creation display means connected to the storage control means and the calculation statistics processing means of the central processing unit; It consists of a printing means for printing out the calculation and statistical processing results connected to the calculation and statistical processing means of the processing device, and the creation of the teaching program file is performed by operating the teaching program creation means prior to automatic measurement. The creation of the calculation program file is performed by controlling the drive of the pulse motor by the storage control means to move the writing table, and the creation of the calculation program file is performed by the calculation statistics program creation means in accordance with the display on the program creation display means. It is characterized by being able to perform operations in sequence.

Function> Due to the above configuration, the measurement procedure and measurement location can be taught in advance to the object to be inspected by the teaching program creation means prior to automatic measurement. Further, according to the display on the program creation display means, it is possible to select items to be calculated and statistically processed by the arithmetic and statistical program creation means. Then, the coordinates of the measurement point of the automatically measured object to be inspected are determined by the measurement point coordinate determination means, and a signal indicating the coordinates is calculated and statistically processed by the arithmetic and statistical processing means of the central processing unit. is printed out by the printing means. Note that the calculation results during automatic measurement are also displayed on the program creation display means.

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 7.

FIG. 1 is a block diagram showing the outline of the apparatus of the present invention, in which 1 is a universal projector, 11 is a measurement point coordinate determining means, 1
4 is a central processing unit, 21 is a teaching program creation means, 24 is a keyboard as a calculation/statistics program creation means, and 25 is a CR as a display means for program creation.
T display, 26 indicates printing means. Measurement point coordinate determining means 1, 1 is counter 2 and CPUZ-801
3, and the central processing unit 14 consists of a storage control means 15 and an arithmetic and statistical processing means 18.

The universal projector 1 includes a stage 2 consisting of an X/table 2x, a Y table 2y, a linear scale 3, a zoom lens 4, and a shape of the object to be inspected placed on the stage 2 as a light source (
(not shown), the screen 5 which is enlarged and projected by the zoom lens 4, and the X/table 2x of the document stand x -
A pulse motor 6 that drives the X-coordinate axis in the X-axis direction, a pulse motor 7 that drives the Y/table 2y of the document table in the Y-axis direction, and a cross carved in the center of the screen 5! II 8 and an optical sensor 9 provided at a predetermined interval.

As shown in FIGS. 2(A), (B), and (C), the linear scale 3 consists of an X linear scale 3x and a Y linear scale 3y.
The Y-linear scale 3y is fixed in the X-axis direction of the coordinate axes, and the Y-linear scale 3y is fixed in the y-axis direction.

As shown in FIG. 2(A), the center of the X-table 2X is made of transparent glass 10 so that the object to be inspected can be placed on it and irradiated with light from a light source. Further, the pulse motors 6 and 7 are connected to the memory control means 1 of the central processing unit 14.
The drive is controlled by 5.

The optical sensor 9 captures the edge of the object to be inspected enlarged and projected on the screen 5 as it changes from bright to dark or from dark to bright.
The reading signal (trigger) is sent to the counter 12. Counter 12 has)X table 2XY table 2y
A pulse signal indicating the X-coordinate and X-coordinate generated by the movement in the X-axis direction and the y-axis direction is also input, and the X-coordinate value and the X-coordinate value are displayed. CPUZ-8
013 is the optical sensor outputted from the counter 12.
In response to the reading signal (trigger) from 9 and the above-mentioned pulse signal, it reads the linear scale 3 and also controls the optical sensor 9 and the linear scale 3.

The storage control means 15 of the central processing unit 14 is a CPU8086.
・Comprised of a cPtJ 8087 16 and a data collection disk 17, the arithmetic and statistical processing means 18 is a cPtJ 8086.80.
87 19 and a program disk 20.

The storage control means 15 reads and stores the linear scale values sent from the CPUZ-8013, and also operates a pulse motor 6 to move the X/table 2X and Y/table 2y of the stage in a predetermined direction for inspection. and 7. The arithmetic and statistical processing means executes the storage control means (1) according to a preset arithmetic program.
Performs calculations for appearance inspection and dimensional measurement of the inspected object based on the information stored in 5, and displays the calculation results and statistical processing results based on the calculation results on the CRT display 25, printer 27, and X-Y plotter 28. To operate.

The central processing unit 14 is provided with two disks, one disk for programs and one disk for data collection. The program disk contains a teaching program (hereinafter referred to as MPF) for teaching this device the measurement procedure and measurement points for the object to be inspected in advance, and a teaching program to teach the measurement procedure and measurement points of the object to be inspected based on the measurement point values automatically measured according to the teaching program. A calculation program (hereinafter referred to as MPP) that calculates the external shape and dimensions of an object and compares it with preset tolerances, and a statistical processing program that statistically processes the measurement and calculation results are stored. .

The measurement points to be taught to the above-mentioned MPF are limited to five types: point, circle, ellipse, square shape, and pitch, and input can be performed by hand using an operation terminal 22, which will be described later.

In addition, the above MPP performs calculations based on the data of the five types of measurement points, and can be broadly classified into calculation commands such as coordinates, distances, angles, intersections, lines, divisions, areas, tangents, pitches, etc. By using these, it is possible to calculate the position and dimensions of almost any part of the object to be inspected.

In addition, the above statistical processing program is equipped with measurement data This makes it possible to perform fine-grained quality control and to respond quickly to the field.

The CRT display 25 is connected to the storage control means 15 and the arithmetic and statistical processing means 18 of the central processing unit 14, and displays the conditions for job selection, teaching data, direct mode data, statistical processing data, and automatic measurement. (Execution mode) Displays calculation result data, etc. Particularly noteworthy is B: if the measurement result is outside the tolerance (internal standard or external standard), a warning display (
For example, items that are within the standard are displayed in white, items that are within the acceptable tolerance range are displayed in yellow, and items that are outside the acceptable tolerance range are displayed in red, etc.).

The printer 27 is connected to the arithmetic and statistical processing means 18 of the central processing unit 14, and prints out arithmetic results during automatic measurement, statistical processing results, inspection tables, arithmetic programs, and the like.

The x-y plotter 28 is used for statistical processing requiring plotting.

The operation terminal 22 for performing teaching operations is connected to the storage control means 15 of the central processing unit, and its outline is shown in FIG. That is, the operation terminal 22 includes a joystick 22a for moving the workpiece table 2, a liquid crystal display section 22b, and a selection of measurement point items taught in the teaching program (for example, points, lines, circles, ellipses, etc.). It consists of a term switch 22c for performing selection) and a speed control switch 22d for controlling the moving speed of the stage 2. The actual teaching operation is performed according to the display on the liquid crystal display section 22b without looking at the display on the CRT display 25.

Further, the digitizer 23 is connected to the storage control means 1 of the central processing unit.
5, and when performing teaching work, you can set the drawing on the digitizer and use the touch pen to input the starting and ending points between the measurement points necessary for measurement from the drawing.

The keyboard 24 is connected to the memory control means 15 and the arithmetic and statistical processing means 19 of the central processing unit, and is used to input the file name of the teaching program, create the arithmetic program file, perform statistical processing, and select the job menu.

When measuring an object to be inspected, first place the object to be inspected on the glass surface 10 of the X/table 2x of the mounting stage 2 of the universal projection PIk1. Place it so that its long axis (longitudinal axis) is almost parallel. In this case, since this device automatically searches and determines the coordinates, it is not necessary to place them accurately (in parallel). Measurement of the object to be inspected placed in this way is carried out according to the measurement flowchart shown in FIG.

First, the liquid crystal display section 22b of the operation terminal 22
Create a teaching program file (MPF file) according to the Japanese display (or the Japanese display on the CRT display 25) (Figure 4 Step ■
). To create this MPF file, first number the drawing of the object to be inspected enlarged and projected on the screen, and move the stage 2 of the universal projector 1 using the shift stick 22a of the operation terminal 22 according to the number. Enter each measurement point. This teaching work is done using optical sensors.
At step 9, while determining the brightness and darkness of the edges of the object to be inspected, as shown in FIG. Similarly, the required number of inputs are made for measurement, and when this teaching work is completed, the information is automatically stored in the data collection disk 17 of the central processing unit.

Next, a calculation program file (MPP file) is created by programming the measurement points taught in step (2) above to obtain the necessary measurement results using calculation commands. B's MPP file creation work is performed by operating the keyboard 24 according to the items displayed on the CRT display 25.

For example, in the case of the object to be inspected as shown in FIG.
1, the distance MA between the circle 102 and the center, the line (point 103, point 10
4) Distance between center of circle 102 glB1 Radius of circle 101 C
The MPP file for obtaining the following is a program as shown in FIG. In the program shown in FIG. 7, KOUSA, 1°CIR, LENG, LINE103
．． 104. EN, SEN, LENG, DIA, 1
01. R.A.D.

101 is the label name, TOLE is the tolerance command, LENG
is the command to find the distance, 101P and 102P are each 4
The center coordinates of circles 101 and 102, and LINE indicate a command to obtain a line.

When the creation of the MPF file and the MPP file are completed as described above, the MPF file and the MPP file are compiled by the central processing unit 14 to create an object program (step 4 in FIG. 4).

Next, start the above object program and check whether the device operates and the measurements are performed correctly according to the MPF in step ① above (Step ① in Figure 4).
If the device operates as specified and the measurement is performed correctly, automatic measurement of the object to be inspected is performed for the first time (Step 4 in FIG. 4).

The measurement values automatically measured according to the MPF are processed according to the MPP by the arithmetic and statistical processing means 18 of the central processing unit, the measurement results are displayed on the CRT display 25, tolerance verification is also performed, and the results are printed out on the printer 27. (Step ■ in Figure 4). Then, statistical processing is performed based on the measured data file, but the items necessary for statistical processing are
5, so all you have to do is operate the keyboard 24 accordingly, and by doing so, you can perform general statistical processing as well as special statistical processing (Step ■ in Figure 4).
. The data statistically processed in step ① above is C
It is displayed on the RT display recorder 25 and printed out on the printer 27 (step ■ in FIG. 4). Furthermore, for statistical processing that requires plotting, the processing results are printed out on the X-Y plotter 28.

The operating status of the apparatus of the present invention has been explained above based on the measurement flowchart shown in FIG. All you have to do is change the MPP file in step (2) above.

In the detailed description of the present invention, specific terms have been used for clarity; however, the present invention is not limited to these terms and may be applied in the same manner to achieve the same purpose. shall be understood to include all operative technical equivalents.

Effects> As mentioned above, the automatic inspection device using the universal projector of the present invention has the following advantages: ■ The programming required for self-determination can be easily performed even by a person who is not familiar with computers; .It is possible to perform more advanced calculations and process measurement results by making full use of calculation programs and statistical processing programs.
■Measurement is performed by detecting the edge of the object to be inspected with an optical sensor, so there is no reading error during measurement. ■Furthermore, computer numerical control (C
(NC) increases the measurement speed and saves labor; ■Furthermore, tolerance verification can be performed while measuring the inspected item, so if there is a defective item, it will be indicated on the CRT display. Since a trigger is output when a warning appears, it is optimal for process control.
For reasons of ~ ■, it can be easily incorporated into production lines as an on-site inspection device, and ■ it is suitable for in-depth measurements and quality control in high-tech fields and various industries that require positional and dimensional accuracy. It has the effect of being an enemy device.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an overview of the device of the present invention, and Figure 2 (
A), CB), and (C) are a plan view, front view, and side view showing the positional relationship between the stage and the linear scale, respectively. Fig. 3 is a plan view showing the configuration of the oberesin terminal, and Fig. 4 is a plan view showing the positional relationship between the stage and the linear scale. A measurement diagram for operating the device of the present invention, Fig. 5 is a diagram showing the starting point and end point between the measurement points of the object to be inspected during teaching work, and Fig. 6 is a diagram showing the measurement point of the object to be inspected. FIG. 7, a plan view showing one embodiment, shows a program showing an example of an MPP file. l- Universal projector, 2... Stage, 3 Linear scale, 5- Screen, 6.7 Pulse motor, 9 Optical sensor, 11 Measurement point coordinate determining means, 14 Central processing unit, 15 Memory control means, 18. Arithmetic and statistical processing means, 21.. Teaching program creation means, 24. Arithmetic and statistical program creation means, 25.. CRT disk play (display means for program creation), 26. Printing means patent applicant Asaka Riken Kogyo. Agent Co., Ltd. Patent Attorney Hideaki Sato Group 2, P3

Claims (1)

[Scope of Claims] (a) A stage on which an object to be inspected having a punched hole is placed and movable by the drive of a pulse motor, and a linear system for teaching the front and back of the measurement position of the object to be inspected. (b) a memory control means connected to a pulse motor of the universal projector; (c) a central processing unit comprising an arithmetic and statistical processing means for creating an arithmetic program file and a statistical processing program file; (d) measurement point coordinate determination means for determining the coordinates of a measurement point of the object to be inspected, the side being connected to the storage control means of the central processing unit; (e) a teaching program creation means for creating a teaching program file for teaching measurement procedures and measurement points for the object to be inspected; (e) connected to the storage control means and the arithmetic and statistical processing means of the central processing unit; (f) a memory of the central processing unit; and (f) a memory of the central processing unit. (g) a display means for creating a program connected to the control means and the arithmetic and statistical processing means; and (g) a printing means for printing out the results of arithmetic and statistical processing, which is connected to the arithmetic and statistical processing means of the central processing unit. The teaching program file is created prior to automatic measurement by operating the teaching program creation means and controlling the drive of the pulse motor by the storage control means to move the writing stage. . An automatic inspection device for an object to be inspected provided with punched holes, characterized in that the creation of the calculation program file is performed by operating the calculation statistics program creation means in accordance with the display of the program creation display means.