JPH10185544A - Method and device for measuring size of sheet metal product and sheet metal working system using them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an unskilled operator to easily decide a spot to be inspected even and, at the same time, to quickly and easily store measured data so as to prevent the occurrence of a description mistake at the time of storing the data by measuring the size of the spot to be measured in accordance with instructions displayed on a display device and inputting the measured values to a prescribed computer. SOLUTION: A computer terminal (terminal) 12 for punching and pressing which numerically controls a punch press 10 used for punching a work piece composed of a sheet metal is connected to the press 10. A first measuring instrument 14 which measures the size of the spot to be worked of a punched product automatically sends measured data to the terminal 12 and a display device 16 displays the data, etc., stored in the terminal 2. A computer terminal 22 for press brake is connected to a press brake 20 which bends the sheet metal and a second measuring instrument 24 sends measured data to the terminal 22. A data management computer 34 collectively manages the measured data from the terminals 12 and 22. A working program preparing computer 30 prepares an NC program for controlling the punch press 10 and press brake 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring the dimensions of a sheet metal machined product for measuring various dimensions related to machining points in a product manufactured by a sheet metal machine tool. It relates to a sheet metal processing system.

[0002]

2. Description of the Related Art Conventionally, an inspection of whether or not a sheet metal processed product has been manufactured to a predetermined standard has been performed by a field worker or a person in charge of inspection using a vernier caliper, micrometer, retractor, three-dimensional measuring instrument. The measurement was performed using such a measuring device.

[0003]

At the time of the measurement, the worker or the like determines an inspection location with reference to work instructions, drawings, and the like. However, a great deal of experience is required to determine a specific inspection location, and it is difficult for an unskilled person to make this determination. In addition, in the measurement, it is difficult for an unskilled person to select which of the caliper, the micrometer, the retractor, and the three-dimensional measuring device to select. Furthermore, it is difficult for an unskilled person to determine how to apply the calipers or the like to an inspection product in order to perform an accurate inspection.

Further, in the conventional apparatus, it is necessary to write the measurement results and the measurement data in a form or the like, but it takes a lot of time to write the data and there is a possibility that a writing error may occur at the time of the writing.

[0005] Further, it is determined whether or not the inspection product is a passing product based on the measurement data, but this determination is also difficult for an unskilled person. In contrast to the above,
In Japanese Patent No. 4550, a product processed by a machine tool is measured by a measuring device, a measurement result is transmitted to an NC device, and the quality is determined and the processing data is corrected. The determination of the inspection location remains difficult for inexperienced persons.

[0006] In recent years, the technical level of field workers has become diversified, and unskilled persons having a low technical level are often required to carry out product inspections as described above. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art.

[0007]

A first feature of the present invention for achieving the above object is to display a measurement location of a sheet metal processed product on a display device and to display the location based on an instruction on the display device. And measuring a measured value of the processed sheet metal product and inputting the measured value from a predetermined measuring device to a predetermined computer via a communication line.

According to this feature, at the time of product inspection and dimension measurement, the measurement location is displayed on the display device, so that an unskilled person can easily determine the inspection location. Further, since the measurement data is automatically stored and stored, the measurement result and the measurement data can be easily stored, and there is no possibility that a description error occurs at that time.

A second feature of the present invention resides in a sheet metal working machine, a terminal computer for the sheet metal working machine for controlling the sheet metal working machine (hereinafter referred to as a terminal for the sheet metal working machine), and the sheet metal working machine. A measuring device for measuring the dimensions of the processed product, and a sheet metal working system comprising: the measuring device comprises an output device for outputting the measured dimensions, and the terminal comprises: A sheet metal working system comprising an input device for inputting dimensions of the sheet metal.

According to this feature, since the measurement data is automatically stored and stored, there is no possibility that a description error occurs when storing the measurement result and the measurement data.

[0011] It is desirable that the display device of the terminal also displays an instruction on the measurement location / measurement device. In this case, at the time of product inspection or dimension measurement, a measurement location or the like is displayed on the display device, so that an unskilled person can easily determine an inspection location.

[0012] Preferably, the terminal comprises a comparing device for comparing the measured value with a reference value. Further, the terminal determines whether or not the measurement data is within a predetermined error range, and outputs a command to correct NC data for the sheet metal working machine if the measurement data is not within the predetermined error range. It is desirable to do. In this case, it is automatically determined whether or not the measurement data is within the allowable error range, so that it can be easily determined whether or not the inspection product is a passing product.

[0013] The terminal desirably includes conversion means and conversion software for converting an actual measurement value to a theoretical dimension when one end of the dimension to be measured is at a point in space. Specifically, when one end of the dimension to be measured is the center of the machined hole and the other end is a predetermined other end, the conversion software sets the end of the hole to be actually measured to the other end. It is desirable to convert the dimension between the ends to the dimension between the center of the hole and the other end. In this case, when the modulus between the center of the hole and the other end has to be measured, and when the modulus between the end of the hole and the other end is measured, this data is obtained as follows. Converted to the dimension between the center and the other end. Therefore, it is not necessary to measure a dimension having the center of the hole as one end.

It is preferable that the terminal has a measuring point specifying means for specifying a point to be measured.

It is preferable that the measuring device is a mechanical measuring device such as a caliper micrometer.

A third feature of the present invention is that a first sheet metal working machine, a terminal for the sheet metal working machine for controlling the first sheet metal working machine, and a dimension of a product processed by the first sheet metal working machine. A first measuring device for measuring the temperature, a second sheet metal working machine, a terminal for the sheet metal working machine for controlling the second sheet metal working machine, and a dimension of a product processed by the second sheet metal working machine. A second measuring device for measuring, and a sheet metal working system comprising: each of the measuring devices includes an output device for outputting a measured dimension; and each of the terminals is connected to the output device from the output device. A sheet metal working system, comprising: an input device for inputting the dimensions of the device; and a data management computer that receives measurement data from the terminals and collectively manages the measurement data. It is in.

According to this feature, it is possible to collectively manage product data by a plurality of sheet metal working machines. For example, the NC data for punching can be corrected with reference to the data after bending.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a sheet metal working system according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of the one embodiment. As shown in FIG. 1, the system includes a punching station 11, a bending station 21, and an office 31.

The punching station 11 is a sheet metal working machine or a sheet metal working machine.
Is provided. The punch press 10 is connected to a punch press computer terminal 12 (hereinafter referred to as a terminal 12) for numerically controlling the punch press 10. The terminal 12 is provided with a receiver (receiver) 12a for receiving data from a measuring device described later.

The terminal 12 is also provided with a first measuring device 14 for measuring the size of a processed portion in a product punched by the punch press 10. This first measuring device functions as a product inspection device. The first measuring device is, for example, one of a caliper, a micrometer, a dial gauge, a retractor, a projector, an electric micrometer, a torque meter, and a three-dimensional measuring device (contact type, non-contact type). As shown in FIG. 4, the lengths A and B of the sides of the product, the distance C between the holes, the diameter D of the holes, and the like are measured. FIG. 9 shows a non-contact type three-dimensional measuring device that can be used in this embodiment. As shown in FIG. 9, in this measuring device, a work W placed on a rotary table 41 is measured by laser length measuring devices 43a, 43b, and 43c arranged in three different directions. The dimensions are calculated from the data. In addition, the laser length measuring device 43a,
Instead of 43b and 43c, the work W may be imaged by an imaging means such as a CCD camera to obtain measurement data and then the dimensions may be calculated.

Referring again to FIG. 1, the first measuring device 14 includes a transmitter (transmitter) 14a for wirelessly transmitting measured data (measured data) to the receiver 12a of the terminal. It is provided. Therefore, the measurement data from the measuring device 14 is automatically transmitted to the terminal 12 equipped with the receiver 12a. The transmitter 14a may transmit the measurement data to the receiver 12a by wire.

A display device 16 for displaying data and the like stored in the terminal 12 is connected to the terminal 12. The display device 16 uses various screen displays on the display device 16. Is provided with a touch screen 16a for inputting the above command.

The bending station 21 is provided with a press brake 20 for bending a sheet metal as a sheet metal working machine or a sheet metal machine tool. The press brake 20 is connected to a press brake computer terminal 22 having a receiver 22a. The second measuring device 24 for measuring the bent product is provided with a transmitter 24a. In addition, since the dimension measuring device of the product processed by the press brake requires the measurement of the angle in addition to the measurement of the flange length, the second measuring device 24 is used.
For example, two types such as a caliper and an angle gauge may be used. Therefore, the measurement data measured by the second measurement device 24 is wirelessly input to the terminal 22 via the transmitter 24a and the receiver 22a. The configuration and operation of the second measuring device 24 are the same as those of the first measuring device 4. The terminal 22 also has a touch screen 26a.
Is connected.

The office 31 is provided with a processing program creating computer 30 having an input device 32 and a data management computer 34 having a display device 36. These computers 30, 34 are connected to the terminals 12, 22 by a LAN network 28. The data management computer 34 collectively manages measurement data from the terminals 12 and 22. In addition, the machining program creating computer 3
Numeral 0 is for creating an NC program for controlling the punch press 10 and the press brake 20 and the like.
The NC program is transmitted to the terminals 12 and 22 and used to control the punch press 10 and the press brake 20. When the size of the system is small, for example, when only the punch press 10 exists as a machine tool, the data management computer 34 can be omitted. In this case, the punch press terminal 12 or the like functions as the data management computer.

FIGS. 2 and 3 are flowcharts showing the operation of the sheet metal working system.

As shown in FIG. 2, at step S1, drawing data for a sheet metal product is inputted from the input device 32 or the like to the machining program creating computer 30.

In step S3, (the computer 30
Based on the drawing data, CAD data and CAM data for punch press (NC for punch press)
Program) and CAM data for press brake (NC program for press brake).

In step S5, a screen for designating a measurement location (measurement dimension), a measurement reference value, a permissible error, a measurement device, and the like when inspecting the product is created. This operation is performed by the office 31
The inspection is performed by the inspector using the data management computer 34 or the processing program creation computer 30.
The screen for instructing the measurement location is created, for example, in the manner shown in FIGS. That is, for the product image W,
Measurement dimension codes A, B, C, D, E, F, G and arrow symbols accompanying them are added. Further, the instruction of the measuring device specifies which measuring device to use from among the available measuring devices (not shown). Further, the measurement reference value means a measurement theoretical value to be provided for a passing product, and the permissible error means an allowable error between measurement data and the theoretical value. Numerical values are displayed at appropriate positions on the screen (not shown).

In step S6, the punch press NC program created in step S3 is transmitted to the terminal 12, the punch press 10 is operated based on the program, and the sheet metal (workpiece) supplied to the punch press 10 is operated. ) Is drilled.

In step S7, a display screen for indicating the measurement location, measurement reference value, allowable error, and measurement device for the product W processed in step S5 is displayed on the display screen 16. For example, the measurement location is displayed as shown in FIG. In FIG. 4, it is instructed to measure the dimensions A, B, C, and D. The measurement reference value and the allowable error are numerically displayed at appropriate positions on the display device 16 (not shown).

In step S8, for example, as shown in FIG.
By pressing one of the positions C and D, the current dimension to be measured is specified. More specifically, the dimensions to be measured at present are specified by pressing the touch screen 16a at each position. For example, when the position of the dimension A is pressed, the dimension to be measured is specified as the dimension A. Note that, when specifying the dimensions to be measured, the terminal 12 can automatically specify the dimensions to be measured. That is, by appropriate control in the computer 12, on the display screen displayed as shown in FIG. Color to a specific color or the dimensional display (A, B, C,
By blinking D and the arrow symbol attached to this symbol), the location to be measured can be automatically specified. In this case, the field worker measures the corresponding dimension on the product based on the dimension whose color has changed or blinking on the screen.

In step S9, the site worker determines in step S
The measured dimensions specified (or specified) in 8 are
The measurement is performed using, for example, a caliper as the measuring device 14 (see FIG. 5). Thereby, for example, the dimension A is measured.

In step S11, the measurement data of the dimensions is transmitted to the terminal 12 via the transmitter 14a and the receiver 12a.

In step S13, the terminal 12 compares the measured data with a reference value and an allowable error.

As a result of the comparison in step S13, if the measured data exceeds the allowable error range, step S1
At 5, the user is notified that the product is not an acceptable product. This notification is performed, for example, by a sound of a buzzer or the like (not shown) provided in the terminal 12 or by a screen display on the display device 16. Thus, for example, when a site worker erroneously measures a dimension different from the specified dimension, the fact is notified.

The dimension C in FIG. 4 is the distance between the centers of the holes. In this case, the end point of the dimension exists in a space where no workpiece exists. Therefore, it is difficult to actually measure this distance. So in this case,
In step S8, an instruction to measure the distance between the ends of the hole is displayed together with the display of the dimension C. Then, in step S9, the distance between the ends of the hole is measured. In step 13, the actually measured distance (for example, the distance between the ends of the hole) is replaced by the distance between the centers of the holes (that is, the dimension C). ) Is performed. In the terminal 12,
A conversion unit (conversion software) for performing such conversion is provided.

In step S16, it is determined whether or not all the dimensions have been measured. If no, the process returns to step S8 until the measurement of dimensions B, C, and D is completed.
-Repeat the operation of S15. Note that the determination in step S16 can be automatically performed by the terminal 12. That is, the terminal 12 manages the dimensional measurement, and when the measurement of all the dimensions is not completed, the terminal 12 is notified. Further, as described above, when the terminal 12 automatically specifies the measured dimensions (see the description in step S8), the process proceeds to step S8.
At 16, the data in computer 12 is automatically updated to specify the next measured dimension and the process returns to step S8.

If it is determined in step S16 that all dimensions have been measured, the process proceeds to step S17.

In step S17, the measurement data is transmitted to the data management computer 34. This data is displayed on the display device 36 (see FIG. 8) and stored in an appropriate memory.

In step S18, the data management computer 34 determines whether or not each measurement data is within a predetermined allowable error range. To the computer 30 for processing program creation.

In step S19, the computer 30 for processing program creates the computer 3 for data management.
Based on the data from step 4, the NC program for punching and (if necessary) the CAD data are modified. Then, the process returns to step S6 to re-execute the punching.

If, for example, only a punch press exists as a sheet metal working machine in the system, the terminal computer 12 is connected to the processing program creating computer 30.
It can also be configured to fulfill all the functions of the data management computer 34. In this case, the operations in steps S3, S5, S17, S18, and S19 are also performed by the terminal computer 34.

If it is determined in step S18 that the measured data is within the allowable error range, the process proceeds to step S20.

In step S20, bending is performed in the press brake based on the CAM data (NC program for press brake) created in step S3.

In step S21, the dimensions and the like to be measured in the bent product are displayed on the display device 26 of the terminal 22.
(See FIG. 6). For example, dimensions E, F, and G to be measured are displayed as shown in FIG.

In step S22, the field worker presses any one of the dimensions E, F, and G (more specifically, the touch screen 26a) shown in FIG. Identify. The measurement dimensions (measurement points) are specified in the same manner as in step S8.
Instead of being performed by the operator, the terminal 22 can perform the processing automatically. In this case, for example, the dimensions to be measured are specified by changing the color of the display of the dimensions E, F, and G (FIG. 6) on the display device 26 or by blinking the dimension display sequentially.

In step S23, the field worker measures the dimensions specified in step 22 using a caliper and / or angle gauge as the second measuring device 24 (see FIG. 7). Thereby, for example, the dimension E is measured.

In step S25, the measurement data is transmitted from the second measurement device 24 to the transmitter 24a and the receiver 22a.
Is transmitted to the terminal 22 via the.

In step S27, the measurement data is compared with the measurement reference value and the allowable error in the terminal 22.
If the measurement data does not exist within the range of the allowable error, the fact is notified in step S29. This notification can be made by voice using a buzzer or the like (not shown) provided in the terminal 22 or by screen display on the display device 26.

In step S30, it is determined whether all dimensions have been measured. If the result is NO, the process returns to step S22, and the process returns to step S22 until the measurement of dimensions F and G is completed.
-Repeat the operation of S29.

In step S31, the measurement data is transmitted from the terminal 22 to the data management computer 34, displayed on the display device 36 of the computer 34 (see FIG. 8), and stored in an appropriate memory. You.

In step S33, the data management computer 34 determines whether or not each of the measurement data is within a predetermined allowable error range. To the computer 30 for processing program creation.

In step S35, the NC program for press brake and the CAD data (if necessary) are modified in the machining program creating computer 30 based on the measurement data from the data managing computer 34. Then, the flow returns to step S20 to execute the bending process again.

If it is determined in step S33 that the measured data is within the allowable error range, the process ends in step S37.

[0056]

According to the present invention, at the time of product inspection and dimension measurement, the measurement location is displayed on the display device, so that even an unskilled person can easily determine the inspection location. In addition, since the measurement data is automatically saved and stored, the measurement results and measurement data can be stored quickly and easily.
In addition, there is no possibility that a description error occurs during the storage. Further, since it is automatically determined whether or not the measurement data is within the allowable error range, it can be easily determined whether or not the inspection product is a pass product.

[Brief description of the drawings]

FIG. 1 is a block diagram of a sheet metal processing system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the sheet metal processing system.

FIG. 3 is a flowchart showing the operation of the sheet metal working system.

FIG. 4 is an explanatory diagram showing a display screen of a punch press terminal computer.

FIG. 5 is an explanatory diagram showing an aspect of dimension measurement for a punched product.

FIG. 6 is an explanatory view showing a display screen of a press brake terminal computer.

FIG. 7 is an explanatory diagram showing an aspect of dimension measurement of a bent product.

FIG. 8 is an explanatory view showing a display screen of a data management computer.

FIG. 9 is a schematic diagram of a non-contact three-dimensional measuring device.

[Explanation of symbols]

 Reference Signs List 10 punch press 12 punch press computer terminal 12a receiver 14 first measuring device 14a transmitter 16 first display device (CRT) 16a touch screen 20 press brake 22 press brake computer terminal 22a receiver 24 second measuring device 24a transmission Device 26 second display device 26a touch screen 28 LAN network 30 computer for processing program creation 32 input device 34 computer for data management 36 third display device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI G05B 19/404 G08C 19/00 301A G08C 19/00 301 G05B 19/18 E

Claims (12)

[Claims] 1. A measurement location of a sheet metal processed product is displayed on a display device, dimensions of the portion are measured based on an instruction on the display device, and a measured value of the measured sheet metal processed product is obtained by
A method for measuring dimensions of a processed sheet metal product, comprising inputting data from a predetermined measuring device to a predetermined computer via a communication line. 2. A computer for outputting a command of a measuring point of a sheet metal processed product, a display device for displaying the measuring point by a signal from the computer, and a measurement for measuring a dimension of the sheet metal processed product and representing the measurement result. A dimension measuring device for a sheet metal processed product, comprising: a measuring device for outputting data; and a receiver for receiving data from the measuring device. 3. The apparatus according to claim 2, wherein the measuring device includes a transmitter for transmitting a measurement result. 4. The apparatus according to claim 2, wherein the receiver is provided at a terminal for the sheet metal working machine for controlling the sheet metal working machine. 5. A sheet metal comprising: a sheet metal processing machine; a terminal for the sheet metal processing machine for controlling the sheet metal processing machine; and a measuring device for measuring dimensions of a product processed by the sheet metal processing machine. In the processing system, the terminal includes a display device for displaying a command of a measurement point of the sheet metal processed product, and the measurement device includes an output device for outputting a measured dimension. Processing system. 6. The sheet metal working system according to claim 5, wherein the terminal further comprises an input device for inputting a dimension from the output device. 7. The sheet metal working system according to claim 6, wherein an instruction on a measuring device is also displayed on a display device of the terminal. 8. The terminal according to claim 6, wherein the terminal includes a comparing device for comparing the measured value with a reference value.
The sheet metal processing system according to 1. 9. A first sheet metal working machine, a terminal for the sheet metal working machine for controlling the first sheet metal working machine, and a first terminal for measuring a dimension of a product processed by the first sheet metal working machine. A measuring device, a second sheet metal working machine, a terminal for the sheet metal working machine for controlling the second sheet metal working machine, and a second measurement for measuring a dimension of a product processed by the second sheet metal working machine. An apparatus, and a sheet metal processing system comprising: each of the measuring devices includes an output device for outputting a measured dimension; and each of the terminals is configured to input a dimension from each of the output devices. A sheet metal working system comprising: an input device; and a data management computer that receives measurement data from the terminals and collectively manages the measurement data. 10. The sheet metal processing system according to claim 9, wherein the data management computer includes a display device for displaying the measurement data on a screen at a time. 11. The terminal determines whether or not the measurement data is within a predetermined error range. If the measurement data is not within the predetermined error range, the terminal corrects NC data for the sheet metal working machine. The sheet metal processing system according to claim 5, wherein the command is output. 12. The data management computer determines whether the measured data is within a predetermined error range, and if not, corrects NC data for the sheet metal working machine. The sheet metal working system according to claim 9, wherein a command for performing the operation is output.