JPH07151663A - Universal test equipment - Google Patents

Abstract

PURPOSE:To provide a test equipment suitable for the behavior test of a test object subjected to repetitive application of pressure in a specified pattern. CONSTITUTION:The universal test equipment 2 comprises a controller unit 1, a receiving table unit 11 for mounting a liquid containing bag as a test object, and a slide table 9 having the rear surface secured with a press table 9a. Up/ down movement of the slide table is controlled by means of the control unit provided with an input unit comprising buttons 21, 23 for inputting the conditions of pressure application pattern in the repetitive test, e.g. a load value and a duration of pressure application.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal testing device,
More specifically, the present invention relates to a universal testing apparatus capable of performing a test in which a predetermined pattern of pressure is repeatedly applied to a test body.

[0002]

2. Description of the Related Art Conventionally, as a universal testing apparatus, Japanese Patent Laid-Open No.
As disclosed in JP-A-217239, pressing means for pressing a test body, driving means for driving the pressing means, a sensor for detecting a load applied to the test body by displacement of the pressing means, There is known a universal testing apparatus including control means for controlling the pressure means and display means for displaying the control content of the control means and the detection result of the sensor. Further, in Japanese Unexamined Patent Publication No. 5-34215, a computer starts measurement based on a load applied by a manual universal testing machine and collects measurement data from the measuring machine for a predetermined load. A predetermined calculation is performed based on this sampling data, various numerical values and a related chart are displayed on the display device based on this calculation information, and are also stored in the storage device, and are stored in the storage device of the load applied by the testing machine. When the ratio to the maximum load decreased, the measurement of one test piece is finished, and after repeating the series of processes until a predetermined number of test pieces are finished, a table of test results and a relational diagram are output by a printer. An automatic measuring method using a manual universal testing machine is disclosed.

[0003]

By the way, for example, in order to test the durability of a bag for containing a liquid, a pressure is applied to the bag in a liquid containing state so as to gradually increase its size.
A bag breaking test is performed to detect the pressure at which this breaks. However, if the bag containing the liquid is repeatedly pressurized due to, for example, vibration during transportation, the liquid will leak even if the peak pressure is smaller than the pressure applied when the bag is broken, as found by the bag breaking test. May occur. In the automatic measuring method using the above-mentioned known universal testing device or manual universal testing machine,
A simulation test that assumes an environment in which a predetermined pattern of pressure, such as vibration during transportation, is repeated is not expected, and this type of test cannot be performed efficiently and accurately as it is. Is difficult.

The present invention has been made in view of the above problems, and an object of the present invention is suitable for testing the behavior of a test body when pressure is repeatedly applied to the test body in a predetermined pattern. It is to provide a universal testing device.

[0005]

In order to achieve the above object, the present invention provides a pressurizing means for applying a pressure to a test body, a drive means for driving the pressurizing means, and a drive means. A universal testing apparatus having control means for controlling, wherein an input device for inputting information regarding a pressure pattern is provided, and a pressure is applied by the pressure means with a predetermined pressure pattern based on data input by the input device. It is characterized in that the control means is configured so that the operation is repeated for the test body.

In the present invention, first, the information regarding the pressure pattern is input by the input device. This information includes, for example, the peak value of pressurization, how to increase the pressure from the start of pressurization to the peak value, how to decrease the pressure from the peak value to the minimum pressure, and the duration of the minimum pressure. Can be mentioned. Based on this input information, the control means controls the drive means to cause the test body to repeat the pressurizing operation in a predetermined pressurizing pattern. The end of the repeating of the pressurizing operation is performed by inputting the repeating number of the pressurizing operation and the pressurizing operation repeating time of the predetermined pattern, for example, by the above-mentioned input device, and the completion of the execution of the input number or the elapse of the input time. Can be set in. Also, instead of this, or in addition to this, based on the pressure detection means for detecting the pressure applied to the test body, the predetermined change in the pressure value detected by the pressure detection means or the comparison result with the predetermined pressure value. Then, the control means may be provided with a comparing means for outputting a pressurizing operation end signal, and the repeating of the pressurizing operation may be ended by the operation end signal from the comparing means. The predetermined pressure value may be input by the input device itself, or like the automatic measuring method disclosed in the above-mentioned Japanese Patent Laid-Open No. 5-34215, the predetermined pressure value is used to determine the measurement end time. The ratio of the load to be applied to the maximum load stored in the storage device may be input by the input device.

[0006]

EXAMPLE An example applied to a universal testing apparatus suitable for the bag breaking test of the liquid containing bag of the present invention will be described below.
FIG. 1 is a front view of a universal test apparatus according to this embodiment, and FIG. 2 is a right side view thereof. This universal testing apparatus is composed of a universal testing machine body 1 and a controller unit 2 provided on the side of the testing machine body. First, the universal testing machine body 1 will be described. The universal testing machine body 1 has a housing portion 5 for housing the servo motor 3, the pressure sensor 4 and the like at the bottom thereof.
Is formed, and the slide plate 9 is mounted on the accommodating portion 5 by two ball screws 6, 7 and guide rods 8, 8 extending vertically upward, and the ball screws 6, 7 and guides are provided on the upper part. A cover portion 10 for positioning the upper ends of the rods 8 is formed. Then, a cradle unit 11 for mounting the test body on the upper wall of the accommodation portion 5
Is fixed. A pressure table 9a is fixed to the lower surface of the slide plate 9.

The lower end of one of the ball screws is connected to the servomotor 3 through a reduction gear device. Further, the ball screws are connected at their lower end portions inside the accommodating portion 5 and at their upper end portions inside the cover portion 10 via connecting gears, respectively. The slide plate 9 is screwed onto these ball screws. As a result, the servo motor 3 operates, and the slide plate 9 moves up and down while being guided by the guide rod.

FIG. 3 is a partial sectional perspective view of the cradle unit 11. The cradle unit 11 has a circular upper wall portion that serves as a test body mounting portion, and has a hollow cylindrical pedestal body 12 placed on the upper wall of the accommodating portion 5, and the cradle body 1
The cover member 13 for positioning 2 and preventing the contained liquid from scattering around when the liquid containing bag is broken.
It has and. In the hollow inside of the cradle body 12,
The pressure receiving shaft 14 of the pressure sensor 4 formed of, for example, a load cell accommodated in the accommodating portion 5 extends through a hole formed in the upper wall of the accommodating portion 5, and its tip portion is the back surface of the upper wall of the cradle main body 12. Is in contact with. Thereby, the load applied to the test body placed on the upper wall portion of the cradle main body 12 can be detected by the movement of the pressure receiving shaft 14 due to the deflection of the upper wall of the cradle main body 12. In addition, the cover member 13
Is an inner cylinder portion 15 having a positioning hollow portion into which the cradle main body 12 enters, a hollow cylindrical outer cylinder portion 16 surrounding the inner cylinder portion 15, and an inner surface of the outer cylinder portion 16 and It has an annular connecting portion 17 that connects the outer surface of the tubular portion 15. The outer surface of the inner tubular portion 15, the upper surface of the annular connecting portion 17, and the outer tubular portion 1
6 Since the liquid containing bag as the test body is ruptured and the leaked contained liquid flows into the annular groove formed by the outer surface, the outer cylinder portion 16 is provided so that the flowing liquid can be discharged to the outside. A drain hole is formed, and a drain port 18 is formed on the outer wall of the outer cylindrical portion 16 corresponding to the hole.
Further, in the illustrated example, the liquid in the groove is drain port 18
The upper surface of the annular connecting portion 17 is formed so as to be lowered toward the drain port portion 18 so as to be smoothly discharged from the inside (see FIG. 2). In addition, the drain port 1 is usually used.
8 is used by connecting a drain pipe (not shown).
A link-shaped seal member 19 is attached to an inner surface portion of the inner tubular portion 15 that faces the peripheral surface of the cradle main body 12. An annular lip 20 having a free end extending above the connecting portion is attached to the upper edge of the outer tubular portion 16. The lip 20 is formed of a flexible material, preferably an elastic material (eg, rubber material).

FIG. 4 is an explanatory view of a state in which pressurization is started on the liquid containing bag A which is a test body. As can be seen from this figure, the pressure table 9a on the lower surface of the slide plate 9 has a circular recess formed on the lower surface, and the bottom surface of the recess and the upper surface of the upper wall of the cradle main body 12 are formed. The test body is pressurized between them. The inner diameter L ₁ of the flange portion around the circular recess is set to be slightly larger than the outer diameter of the inner tubular portion 15 of the cover member 13, and the outer diameter L ₂ of the outer tubular portion 16 of the cover member 13 is set. It is set so that a large gap does not occur between the attached lip 20 and, preferably, the lip 20 can be hermetically attached. As a result, when the pressure is applied to the test body by approaching the cradle main body 12 of the pressure table 9a, the lip 20 of the cover member 13 is brought into close contact with the outer periphery of the flange portion of the pressure table 9a, and the pressure is applied. A substantially sealed space is formed by the base 9a, the lip 20, and the inner and outer cylindrical portions 16 of the cover member 13 and the connecting portion,
Even if the liquid containing bag A as the test body is broken instantaneously, the contained liquid does not scatter out of this space. The height of the flange portion is set so that the lip 20 of the cover member 13 can be brought into close contact with the outer periphery of the flange portion of the pressurizing table 9a at the time when the pressurization of the specimen is started in this way. It is desirable to set the thickness more than the original thickness.

Next, the controller unit 2 will be described. The controller unit 2 of this embodiment is shown in FIG.
As shown in, a button 21 for inputting numerical values for setting test conditions, test selection buttons 22, 23, 24 for selecting one of the bag break test, repetition test and constant pressure test,
The universal tester main body 1 is provided with a speed control photograph 25 for adjusting the ascending / descending speed of the slide plate 9, an emergency stop photograph 26, a test start button 27, a liquid crystal display 28, and a printer 29. Then, in addition to these buttons and photographing, signals from the pressure sensor 4 of the universal tester body 1 are received inside, and the printer 29, the liquid crystal display 28, and the universal tester body 1 are also received. A control unit for controlling the servo motor 3 and the like is stored. Figure 5
It is a block diagram of this control part. This control unit includes a servo motor drive circuit 30, an operation controller 31 to which the above-mentioned buttons and photographing, and a liquid crystal display 28 are connected, the servo motor drive circuit 30 and the operation controller 31, and the pressure sensor 4 described above. And a main controller 32 connected to the printer 29. The main controller 32 includes a CPU having a RAM (random access memory) and a ROM (read only memory) attached thereto, and outputs a control signal to each unit by executing a control program stored in the ROM. Captures detection signals. It should be noted that three keys (F1, F1) provided additionally to the group of keys for inputting numerical values in FIG.
2, F3) are keys which are used when, for example, the test conditions set by using the numerical input buttons are read out and executed, and the test conditions stored in the RAM or the like are read out.

The operation of the universal test apparatus configured as described above will be described. First, the test condition is input using the test selection key and the numerical value input key. FIG. 6A is an explanatory diagram showing an example of a time change of a load applied to a test body in a bag breaking test, FIG. 6B is a repeated test, and FIG. 6C is a constant pressure test.

In the bag breakage test, for example, as shown in FIG. 6 (a), the slide plate 9 of the universal testing machine is lowered at a constant speed adjusted by the speed control photographing 25 of the controller unit 2 to test the test piece. Is detected using the detection output of the pressure sensor 4 (for example, it is determined that bag breakage has occurred due to a change in the detection weight from increase to decrease), and the bag is broken. This is a test in which the peak value of the load immediately before is measured, and whether or not bag breakage occurs by pressurizing the test body until a preset peak load is reached.

In the former type of bag breaking test, there are no specific test conditions other than the descending speed of the slide plate 9. Therefore, for example, after pressing the test selecting key 22 for the bag breaking test, the enter key 33 is pressed. By pressing, the program is presumed to be regarded as the former type of bag-breaking test using the speed corresponding to the adjustment position of the speed control photograph 25 when the enter key 33 is pressed. In the latter bag breaking test, the peak load is input from the numerical value input keys after pressing the test selection key 22 for the bag breaking test,
Moreover, it is programmed to consider that the latter type of bag breaking test is performed by pressing the enter key 33 and using the speed corresponding to the adjustment position of the speed control photograph 25 when the enter key 33 is pressed. Here, the input test conditions are stored in the RAM of the CPU together with the type of test.

The repetitive test is a test in which a pressurizing pattern such as between times t _{0 and} t ₁ is repeated, as shown in FIG. 6 (b), for example. For example, in the illustrated example, pressurization start (t
_{From 0} ) to the first load value P ₁ and the load value P ₁
When the pressure sensor 4 detects that the load value is reached, the load value becomes P ₃
Until the load value P ₃ is reached, the load is maintained for T ₁ hours after the pressure sensor 4 detects that the load value P ₃ is reached, and the pressure is increased until the load value becomes P ₂ when T ₁ elapses. ,
The load is maintained for T ₂ hours after the pressure sensor 4 detects that the load value P ₂ has been reached, and the pressure is lowered until the load value becomes 0 at the time when this T _{2 has} elapsed, and the load value becomes 0. When that happens, one pattern ends here, and the second pattern of pressing continues with the same pattern. In the case of this example, after pressing the test selection key 23 for the repeat test, using the numerical value input keys, the load value P ₁ , the duration time 0, the load value P ₃ , the duration time T ₁ , the load value P ₂ , and the continuation are performed. By inputting the weight value and the continuation time alternately while pressing the enter key 33, such as time 0, load value P ₃ , duration T ₂ , and by inputting the number of repetitions as necessary, the enter key It is programmed so that it is regarded as a repetitive test using the speed corresponding to the adjustment position of the speed control photograph 25 when 33 is pressed. Also in this case, the input test conditions are stored in the RAM of the CPU together with the type of test.

In the constant pressure test, for example, as shown in FIG. 6C, a predetermined load P is continuously applied for a predetermined duration T or until bag breakage occurs, and the presence or absence of bag breakage during that time is measured. It is a test. In this test, after pressing the test selection key 24 for the constant pressure test, by inputting the overweight value P and the duration T as necessary using the enter key 33, the speed at which the enter key 33 is pressed is set. It is programmed so that it is regarded as a constant pressure test using a speed corresponding to the adjusted position of the control photograph 25. Again, the input test conditions are the RA of the CPU as well as the type of test.
Stored in M.

After selecting the test type and inputting the test conditions in the procedure corresponding to the program as described above, the test body is placed on the cradle main body 12 of the universal testing machine and the test start is started. This test start instruction is given, for example, by pressing the start button after pressing the test selection key. As a result, the servo motor 3 is controlled while reading the detection output of the pressure sensor 4 based on the test conditions stored together with the type of test, and the test body is pressed to perform the test. Furthermore, the history of the load on the test body is graphically displayed in real time based on the output of the pressure sensor 4 during the test. That is, the graph itself shown in FIGS. 6A to 6C is displayed. Then, for example, in the bag breaking test, as described in accordance with the upper right area of FIG.
The peak value P of the load immediately before the bag is broken, the time t ₁ from the start of pressurization until the bag is broken, and the load value is 0 after the start of pressurization and after the bag is broken.
The time t2 and so on are displayed on the liquid crystal display 28.
It is preferable that the actual screen of the liquid crystal display 28 also displays these calculated values together with the graph of the load history as shown in FIG.

In any of the tests, if it is found from the detection output of the pressure sensor 4 that the bag is broken during the test, the load peak value immediately before the bag is broken is displayed at that time. Then the test ends.

After the test is completed, the printer 29 automatically displays the graph displayed on the liquid crystal display 28, and the servo motor 3 is controlled to slide to a height that does not interfere with the mounting of the next test body. Raise plate 9. Here, the rise of the slide plate 9 after the end of this test and the fall of the slide plate 9 after the start of the test until the pressurizing table 9a of the slide plate 9 comes into contact with the test body to start pressurization shortens the test time. For this reason, the speed control is performed at a relatively high speed, which is different from the speed setting by the shooting 25.

In the display by the liquid crystal display 28, it is desirable that the scale of the time axis which is the horizontal axis of the load history graph can be switched by a photographing operation or the like. Further, in the above embodiment, the load cell is used as the pressure sensor 4, but other sensors may be used. In addition, the controller unit 2
For example, by connecting a personal computer or the like via an interface 40 shown in FIG. 5, input setting of test conditions from an external device such as a personal computer, storage of test result data,
You may be able to organize. In addition, the controller unit 2 is also connected to a reading device for reading data stored and recorded in a recording medium such as an IC card, and data of test conditions recorded in the recording medium created by an external device such as a personal computer. May be read from the recording medium and used. Further, a data writing device for a recording medium such as an IC card may be connected to the controller unit 2 in the same manner and the test result may be written in the recording medium. Further, although the above-mentioned embodiment has described the example in which the liquid storage bag A is used as the test body, the universal testing apparatus of the present invention is for a simulation test or the like assuming an environment in which pressurization of a predetermined pattern is repeated. Widely applicable to universal testing equipment.

[0020]

According to the present invention, the information about the pressure pattern is input by the input device, and the drive means is controlled by the control means on the basis of the input information, so that the test body is applied with the predetermined pressure pattern. Since the pressurizing operation is repeated in this manner, there is an excellent effect that the behavior of the test body can be automatically tested when the test body is repeatedly pressed in a predetermined pattern.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration of a universal testing device according to an embodiment.

FIG. 2 is a right side view of the test apparatus.

FIG. 3 is a partial cross-sectional perspective view of a part of the test apparatus.

FIG. 4 is an explanatory diagram of an operation of the test apparatus.

FIG. 5 is a block diagram of a control unit of the test apparatus.

FIG. 6A is an explanatory diagram of a bag breaking test using the same test apparatus. (B) is explanatory drawing of a repeated test using the same test apparatus. (C) is explanatory drawing of a constant pressure test using the same test device.

[Explanation of symbols]

 1 Universal testing machine 2 Controller unit 9 Slide plate 9a Pressure base 11 Receiving base unit 13 Cover member

Claims (1)

[Claims] 1. A pressurizing means for applying a pressure to a test body,
A universal testing apparatus having a driving means for driving the pressurizing means and a control means for controlling the driving means is provided with an input device for inputting information on a pressurizing pattern, and based on the data input by the input device. A universal testing apparatus characterized in that the control means is configured so that the pressing operation by the pressing means is repeated on the test body in a predetermined pressing pattern.