JP2004361123A - Material testing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a material testing machine using wireless IC tags for setting the same test conditions on a plurality of specimens. <P>SOLUTION: The test conditions are recorded in a wireless IC tag 12A, and the wireless IC tag 12A is mounted on a pallet 12. Type differences, test maximum load, etc. of grippers 7 and 8 are recorded in wireless IC tags 30, and the wireless IC tags 30 are held by the grippers 7 and 8. A control unit 20 displays the type differences and test maximum load of the grippers transmitted from the wireless IC tags 30 on a monitor 24 on one hand and displays the test conditions transmitted from the wireless IC tag 12A on the monitor 24 on the other. Jig information and the test conditions are compared with each other. For example, in the case that the test conditions read from the wireless tag 12A of the pallet 12 are set on bending tests when grippers for tensile tests are mounted, Tests are disabled. Recommended jigs suitable for bending tests are displayed on the monitor 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a material testing machine for setting the same test conditions on a plurality of test pieces.
[0002]
[Background Art]
When testing a rubber or plastic test piece, a value obtained by averaging the results of tests performed on a plurality of test pieces is used. Therefore, it is necessary to input test conditions for a plurality of test pieces before the test. Therefore, setting the test conditions for each of the plurality of test pieces under the same test conditions is complicated.
[0003]
Conventionally, a bar code is provided on a pallet that accommodates and transports a plurality of test pieces, and a test condition or the like recorded on the bar code is read by a reader (Patent Document 1). However, since the barcode reader optically reads information, there is a problem that an installation place is restricted. There is also a limit on the amount of information that can be recorded.
[0004]
[Patent Document 1] JP-A-9-229836
[0005]
The present invention provides a material testing machine using a wireless tag that sets the same test conditions on a plurality of test pieces.
[0006]
[Means for Solving the Problems]
(1) The material testing machine according to the first aspect of the present invention is configured such that a load means for applying a load to a test piece via a jig according to a predetermined test condition and a wireless tag provided in the test piece transport container. Recognizing the test conditions of the test pieces contained in the test piece transport container based on the communication means for transmitting and receiving information and the information transmitted from the wireless tag and received by the communication means, and controlling the load means based on the test conditions And control means for applying a load to the test piece.
(2) Instead of providing a wireless tag in the test piece transport container, a wireless tag may be provided on the test piece and the test may be performed in the same manner.
(3) In the above-described material testing machine, a wireless tag that records information on the use of the jig (jig information) may be provided on the jig. In this case, the material testing machine compares the test condition output from the control unit with the jig information read from the wireless tag of the jig, and prohibits the test when the comparison result by the comparison unit does not match. May be further provided.
(4) The information output from the wireless tag may be an identification number of a transport container or a test piece, instead of the test condition itself. In this case, the control means has a database in which the identification numbers are associated with the test conditions, and is configured to search and output the test conditions from the database based on the received identification information.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
-First embodiment-
A material testing machine according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of the material testing machine. A pair of columns 2 are erected on both sides of the base 1, and upper ends of the pair of columns 2 are connected by a cross yoke 3. Screw rods (not shown) are respectively arranged along the columns 2 inside the pair of columns 2, and the screw rods are screwed to nuts provided inside the crosshead 4, respectively. That is, the crosshead 4 is horizontally suspended between the screw rods, and the crosshead 4 moves up and down by the rotation of the screw rods. An upper grip 7 is installed on the lower surface of the crosshead 4 via a load cell 6, and a lower grip 8 is installed on the base 1. The crosshead 4 is raised to apply a tensile load to the test piece TP between the upper and lower grips.
[0008]
The test piece TP is stored in the pallet 12 and transported by the belt conveyor 13. The test piece mounting robot 14 suctions one test piece TP from the pallet 12 with the suction device 15 and mounts the test piece TP on the upper and lower grips 7 and 8.
[0009]
FIG. 2 shows a pallet 12 which contains five rubber test pieces and transports them to a material testing machine. A so-called wireless tag 12A is mounted on the pallet 12. The wireless tag 12A has a built-in semiconductor memory. Data is written in the semiconductor memory in a non-contact manner using an inductive electromagnetic wave or a radio wave using the reader / writer 16. In addition, data is read from the semiconductor memory using the reader / writer 16 in a non-contact manner. Note that the reader / writer 16 is installed in the communicable area of the wireless tag 12A. In the example of FIG. 1, the test piece mounting robot 14 is installed.
[0010]
In the first embodiment, the test condition of the material testing machine is recorded on the wireless tag 12A of the pallet 12, and the material testing machine performs a test according to the test condition. As test conditions, test types such as tensile / compression / bending, test material, test piece dimensions and shape, test speed, maximum load, maximum displacement, data output format, and the like are recorded.
[0011]
The structure of the upper and lower grips 7, 8 is substantially the same, and FIG. 3 shows a schematic configuration thereof. The grips 7 and 8 include connecting rods 71 and 81, gripper bodies 72 and 82, and a pair of wedge-shaped gripping teeth 73 and 83. A file is formed on the gripping surface of the test piece. The gripper bodies 72 and 82 have opposed tapered surfaces, and gripping teeth 73 and 83 are slidably held on the tapered surfaces, respectively. The test piece TP can be sandwiched between the pair of gripping teeth by changing the relative positional relationship between the gripper bodies 72 and 82 and the pair of grippers 73 and 83 in the load axis direction by a mechanism (not shown). The gripping force of the test piece TP increases due to the wedge effect of the gripping teeth 73 and 83 when a tensile force acts on the test piece TP.
[0012]
A wireless tag 30 similar to the wireless tag 12A described above is mounted on the gripper bodies 72 and 82. Data is written to and read from the semiconductor memory of the wireless tag 30 in a non-contact manner by using a reader / writer 31 by induced electromagnetic waves or radio waves. The reader / writer 31 is installed in a communicable area of the wireless tag 30. In the example of FIG. 1, it is installed on the crosshead 4 and the base 1.
[0013]
In the first embodiment, the semiconductor memory of the wireless tag 30 of the grippers 7 and 8 has the identification number, the serial number, the manufacturing date, the purchase date, the tension / compression / The bending test type, load capacity, and the like are recorded. These pieces of recorded information are collectively called jig information, and based on the jig information, the suitability of the test conditions, the presentation of the optimal test method, and the suitability of the measuring instrument to be used are displayed on the display monitor 24.
[0014]
The types of grips for tensile tests are mainly fixed-position wedge grips for metal and plastic test pieces, or flat grips mainly for plastics, rubber, cloth, and fabric. As a type of the compression test platen, there are a fixed type platen and a keyboard type compression test jig used for a physical test. As the types of the bending test jig, there are a plastic three-point bending test jig, a small test three-point / 4-point bending test jig, a metal three-point bending test jig, and the like.
[0015]
When distinguishing the wireless tags 30 provided on the gripper bodies 72 and 82 of the upper and lower grippers 7 and 8, respectively, the reference numeral 30U is assigned to the wireless tag of the upper gripper 7 and the reference numeral 30L is assigned to the wireless tag of the lower gripper 8. To distinguish them. Similarly, the reader / writer 31 is distinguished by attaching the reference numeral 31U to the upper grip reader / writer and the reference numeral 31L to the lower grip reader / writer.
[0016]
The material testing machine includes a control device 20. As shown in FIG. 4, the control device 20 includes an arithmetic processing device 21 mainly composed of a CPU, a keyboard 22, a control panel 23 having a test start button 23a, and a monitor 24. The above-described reader / writers 16, 31U, 31L and the robot 14 are connected to the arithmetic processing unit 21. The test result is displayed on the monitor 24. The motor 25 is an electric motor for driving the screw rod, and its driving is controlled by the arithmetic processing unit 21. The test conditions are input by the operator from the keyboard 22 prior to the test, and are stored in the semiconductor memory of the wireless tag 12A from the arithmetic processing unit 21 via the reader / writer 16. Then, when executing the test, the test conditions are read from the wireless tag 12A.
[0017]
FIG. 5 is a flowchart showing a processing procedure of a program executed when the test start button 23a is operated. The program is stored in the arithmetic processing unit 21. In step S21, the jig information stored in the semiconductor memory of the wireless tag 30 is read via the reader / writer 31, and displayed on the monitor 24.
[0018]
In this embodiment, since it is assumed that the upper and lower grips 7, 8 are always used as a set, data is exchanged between the upper gripping wireless tag 30U and the reader / writer 31U. And The upper and lower grips 7, 8 may not always be used as a set, and in such a case, it is preferable to warn the user.
[0019]
After the information of the gripping tool is displayed in step S21, the process proceeds to step S22. In step S22, the test conditions stored in the semiconductor memory of the wireless tag 12A of the pallet 12 are read via the reader / writer 16, displayed on the monitor 24, and the process proceeds to step S23. In step S23, the read jig information is compared with the contents of the test conditions. As a result of the comparison in step S23, when the jig information and the contents of the test condition match, the process proceeds to step S26. In step S26, a test is performed according to the contents of the test conditions. In step S27, the test is continued until the end of the test is determined. When the end of the test is determined, the test ends.
[0020]
The material testing machine of the first embodiment performs a test on the five rubber test pieces TP stored in the pallet 12 under the same test conditions. The tests in steps S26 and S27 are roughly as follows. And executed. In step S26, the robot 14 sucks one test piece TP and attaches it to the grippers 7, 8. Thereafter, the test is performed according to the test conditions, and data is collected. Next, the first test piece TP is removed, the second test piece TP is set on the upper and lower grips 7 and 8 by the robot 14, and a test is performed under the same test conditions to collect data. If it is determined in step S27 that the test has been completed for the five test pieces TP, the test is terminated.
[0021]
As a result of the comparison in step S23, if the jig information does not match the content of the test condition, the process proceeds to step S24, and processing for inhibiting the test is performed. For example, the power supply circuit of the screw rod drive motor 25 is opened. Thereafter, in step S25, the fact that the test is prohibited is displayed on the monitor 24, and a warning is displayed on the monitor 24 that the jig information does not match the test condition.
[0022]
The comparison result of step S23 is determined to be inconsistent, for example, when the tensile test is recorded under the test conditions, but the type of the bending test jig is recorded in the jig information. . In this case, a message prompting replacement of the jig is displayed. For example, it is possible to display "The jig is different. Replace it with an appropriate jig." Alternatively, recommended jigs as shown in FIG. 6 may be displayed in a list format.
[0023]
As described above, in the material testing machine of this embodiment, when performing a test on a plurality of test pieces under the same test conditions, the pallet 12 is provided with the wireless tag 12A in which the test conditions are recorded, and is separated from the pallet 12. The information of the wireless tag 12A is read by the reader / writer 16 installed on the robot 14 which has been set. When the test start button 23a is operated, the jig information is read from the wireless tag 30 attached to the gripper, and the test conditions are read from the wireless tag 12A attached to the pallet 12, and the contents of the two are compared. If there is a mismatch between the two, the control device 20 prohibits the test and notifies the operator that the jig is inappropriate. Therefore, the following operation and effect can be obtained.
(1) The distance between the wireless tag 12A and the reader / writer 16 can be set to a value at which short-range wireless communication is possible, and when the space is limited as in an automatic material testing machine, a conventional optical bar can be used. The degree of freedom of setting the reader / writer 16 is higher than that of the code reader.
(2) Since the validity of the jig is determined by comparing the jig information with the test conditions, it is possible to prevent unreliable data collection due to use of an inappropriate jig.
(3) When the jig information is compared with the test conditions and the jig is inappropriate, if the best recommended jig is displayed in a list form, even an inexperienced worker can be properly operated. A jig can be selected.
[0025]
When comparing the jig information and the contents of the test conditions in step S23, the following items may be compared.
(1) Working load of gripper and maximum test load For example, when the working load of the gripper is 100 kg and the maximum test load is 500 kg, the test is prohibited and a warning is displayed.
(2) Type of grip and material of test piece For example, if the material of the test piece is metal when the grip is plastic, the test is prohibited and a warning is displayed.
[0026]
-Second embodiment-
Instead of recording the specific individual jig information such as the type of the gripper and the maximum test load on the wireless tag 30, the identification number of the jig may be recorded on the wireless tag 30. Instead of individually and individually recording test conditions such as test loads on the wireless tag 12A, the identification number of the pallet 12 may be recorded on the wireless tag 12A. In this case, based on the identification number, specific individual jig information such as a jig type and a test maximum load and test conditions are read from the database of the arithmetic processing unit 21. A material testing machine according to the second embodiment will be described.
[0027]
In the material testing machine according to the second embodiment, the identification number of the grip is written in the semiconductor memory of the wireless tag 30, and the control device 20 reads the identification number via the reader / writer 31. Further, the identification number of the pallet 12 is written in the semiconductor memory of the wireless tag 12A, and the control device 20 reads the identification number via the reader / writer 16. The identification number of the gripper and the identification number of the pallet are recorded in advance on the wireless tags 30, 12A via the reader / writer 31 or 16. In the storage area of the control device 20, a first storage area corresponding to the jig identification number and a second storage area corresponding to the pallet identification number are set in advance. The type of the gripper, the maximum test load, and the like are written in the first storage area, and the test conditions for each pallet are written in the second storage area. That is, the arithmetic processing unit 21 is provided with a jig database and a pallet test condition database for each identification number.
[0028]
The processing procedure of the second embodiment will be described with reference to the flowchart of FIG. 7 is started when the test start button 23a is operated. In step S11, the control device 20 reads the identification number of the gripper from the wireless tag 30 via the reader / writer 31. Further, the control device 20 reads the identification number of the pallet 12 from the wireless tag 12A via the reader / writer 16. In step S12, jig information corresponding to the identification number is read from the jig database provided in the arithmetic processing unit 21, and the process proceeds to step S13. In step S13, the read jig information is displayed on the monitor 24.
[0029]
In step S14, the test condition corresponding to the identification number of the pallet 12 is read from the test condition database provided in the arithmetic processing unit 21, and the process proceeds to step S15. In step S15, the read test conditions are displayed on the monitor 24, and a list of grips suitable for the test conditions is also displayed as recommended grips.
[0030]
Judging from this monitor screen, the operator inputs a test continuation instruction if the attached grip is in the recommended grip list. Thus, if step S16 is affirmed, the test is started in step 17, and if it is determined in step S18 that the test is finished, the test is finished. If there is no grip attached in the recommended grip list displayed in step S15, the operator instructs the test to be interrupted. In this case, step S16 is determined to be interrupted, and this processing ends.
[0031]
As described above, in the material testing machine according to the second embodiment, the identification number of the grip attached to the tester is read from the wireless tag, and the grip information read from the database of the arithmetic processing unit 21 is monitored. 24. Further, the identification number of the pallet 12 is read from the wireless tag 12A, and the test condition and the recommended jig read from the database of the arithmetic processing unit 21 are displayed on the monitor 24. When the operator determines that the grasping tool simultaneously displayed on the monitor 24 does not exist in the recommended grasping tool list created from the test conditions, the operator suspends the test. I do. As a result, effects similar to those of the first embodiment can be obtained.
[0032]
-Third embodiment-
Instead of providing a wireless tag on the pallet 12, a wireless tag 71 may be attached to the test piece TP as shown in FIGS. 8 (a) and 8 (b). The above-described test conditions and identification numbers are also recorded in the wireless tag 71, and a match / mismatch between the jig of the material testing machine and the test conditions is determined in the same manner as described above. Alternatively, a display similar to that of the above-described description S is also performed. The test pieces 70 are made of metal, for example, and are stacked and stored one by one in a magazine. As shown in FIG. 8B, it is preferable to mount the wireless tag 71 on the side surface of the test piece or on the upper and lower end surfaces of the test piece, as shown in FIG. A groove may be dug in the lamination surface of the test piece TP, and the wireless tag 71 may be accommodated in the groove.
[0033]
FIG. 9 shows an example of an automatic material testing machine when the wireless tag 71 is attached to the test piece TP as shown in FIG. The test pieces TP are stacked and stored in the storage section 101a of the test piece storage magazine 101. The test piece at the upper end of the test pieces TP stored in the test piece storage magazine 101 is sucked by the suction device 102 and transported by the transport device 103. When the motor 108 is rotated, the test piece receiving plate 109 rises upward, and one test piece TP can be pushed up to the upper part of the storage magazine 101. 110 is a threaded rod.
[0034]
The information of the wireless tag 71 is read by the reader / writer 104 during the transportation, and the test conditions are stored in the memory of the control circuit 105. The control circuit 105 sets test conditions for the material testing machine main body 106 according to the test conditions stored in the memory. Next, the test piece TP is transported to the size measuring device 107 by the suction device 102 and the transport device 103, and the test piece TP is measured. The test piece TP is set to 106 and the test of the test piece TP is performed according to the set test conditions.
[0035]
In the third embodiment described above, the wireless tag 71 is attached to the test piece TP, the same information as that in the first and second embodiments is recorded on the wireless tag 71, and the information is read. Performs automatic tester processing. Therefore, the same operation and effect as described above can be obtained.
[0036]
In the above, an example in which the wireless tag 30 is attached to the gripper body and the jig information and the test conditions are compared has been described. However, the present invention is not limited to this. For example, a wireless tag may be attached to the grip teeth. The information read from the gripping tooth wireless tag is also the jig information in this specification. The type of gripping tooth can be recorded on the wireless tag as jig information. If the material of the test piece to be used by the gripping teeth is different from the material of the test piece recognized from the test conditions, the test is prohibited and the monitor 24 is warned. It is preferable that the monitor 24 displays a grip tooth optimal for the test piece material recognized from the test conditions as a recommended grip tooth. Further, various kinds of information on the grip teeth may be displayed on the monitor 24.
[0037]
A wireless tag may be attached to the load cell. Information read from the wireless tag of the load cell is also the jig information in this specification. Load cell capacity can be recorded on the wireless tag as jig information. In this case, when the load cell capacity is 100 kg and the maximum test load is 500 kg, the test is prohibited and the monitor 24 is warned. It is preferable to display the optimum load cell capacity on the monitor 24 as a recommended load cell. Further, the load cell information may be displayed on the monitor 24.
[0038]
Alternatively, a wireless tag may be attached to the extensometer. Information read from the wireless tag of the extensometer is also jig information in this specification. When the jig information in this case is the maximum measurement distance of the extensometer, if the maximum measurement distance is 10 mm and the maximum measurement elongation is 25 mm as a test condition, the test is prohibited and a warning is issued to the monitor. It is preferable to display the extensometer having the optimum maximum measurement distance on the monitor 24 as the recommended extensometer. Further, the extensometer information may be displayed on the monitor 24.
[0039]
Although the load means in the above embodiment is constituted by a pair of screw rods and the crosshead 4, other types of load mechanisms of a material testing machine can be used. The control means is not limited to the embodiment. The wireless tag is provided with a semiconductor memory and can transmit and receive various kinds of information on the use of the jig by short-range communication. The type of the wireless tag is not limited as long as it can be attached to a test jig, a pallet, or a test piece. Absent. The test piece transport container is realized by the pallet 12, but the structure is not limited as long as one or more test pieces can be accommodated.
[0040]
【The invention's effect】
As described above, according to the present invention, the wireless tag is attached to the test piece transport container or the test piece itself, and the test condition and the identification number of the wireless tag are wirelessly read by the communication means. The degree of freedom of installation of communication means for reading data is improved as compared with a conventional bar code reader, and is effective when there is a restriction in space as in an automatic material testing machine.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of a material testing machine according to the present invention; FIG. 2 is a perspective view of a pallet; FIG. 3 is a view showing a schematic configuration of a gripper of FIG. 1; FIG. FIG. 5 is a flowchart showing a processing procedure of the first embodiment; FIG. 6 is a diagram showing a display example of a recommended gripping tool; FIG. 7 is a flowchart showing a processing procedure of the second embodiment; FIG. 8 is a perspective view of a test piece provided with a wireless tag. FIG. 9 is a view showing one embodiment of a material testing machine according to a third embodiment.
4: Cross head 7: Upper grip 8: Lower grip 20: Controllers 12A, 30, 30U, 30L: Wireless tags 15, 31, 31U, 31L: Reader / writer

Claims (5)

Loading means for applying a load to the test piece via a jig according to a predetermined test condition,
Communication means for exchanging information with a wireless tag provided in the test piece transport container,
Based on the information transmitted from the wireless tag and received by the communication means, the test condition of the test piece stored in the test piece transport container is recognized, and the load means is controlled based on the test condition to control the test piece. And a control means for applying a load to the material testing machine. Loading means for applying a load to the test piece via a jig according to a predetermined test condition,
Communication means for exchanging information with a wireless tag provided on the test piece;
Control means for recognizing a test condition of the test piece based on information transmitted from the wireless tag and received by the communication means, and controlling the load means based on the test condition to apply a load to the test piece. A material testing machine comprising: The material testing machine according to claim 1 or 2,
A wireless tag that records information on the use of the jig (jig information) is provided on the jig;
Comparison means for comparing the test condition output from the control means with the jig information read from the wireless tag of the jig;
A material testing machine further comprising prohibiting means for prohibiting a test when the comparison result by the comparing means does not match. The material testing machine according to claim 1,
The information output from the wireless tag is an identification number of the transport container,
A material testing machine, wherein the control means has a database in which the identification numbers are associated with the test conditions, and retrieves and outputs test conditions from the database based on the received identification information. The material testing machine according to claim 2,
The information output from the wireless tag is an identification number of the test piece,
A material testing machine, wherein the control means has a database in which the identification numbers are associated with the test conditions, and retrieves and outputs test conditions from the database based on the received identification information.

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