Jig set

Abstract

To provide a jig set in which a jig set and a sample do not cause resonance in a vibration test in a range of 2000 Hz or lower, and a harmful effect to the vibration test can be suppressed.SOLUTION: A jig set is used for fitting a sample 30 to a test device 6, and comprises: a jig body 10 whose five surfaces other than a surface into which the sample 30 is inserted, are fixed by bolts 4a; and a test device adapter 20 for connecting the jig body 10 by the bolt 4c. The test device adapter 20 is fixed to the connection part 5 of the test device 6 by the bolt 4b, and the jig body 10 and the test device adapter 20 are formed of materials obtained by cutting aluminum whose thickness is 30 mm or more and 50 mm or less, and an interval of the bolt holes 4, is 20 mm or more and 100 mm or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a jig set consisting of a jig body and a test device adapter used in tests to evaluate the environmental resistance performance of electronic devices against vibration, and in particular to a jig set that reduces the effect of the jig body resonating with a specimen being tested on the test results. [Background technology]

[0002] [Prior Art] In the past, in tests to evaluate the environmental resistance of electronic devices, when creating jigs to simulate the mounting points of the test specimen (imitating the actual mounting conditions), the mounting structure was reproduced by welding flat plates.

[0003] [Conventional jig set: Figure 6] A conventional jig set will be described with reference to Fig. 6. Fig. 6 is a schematic diagram of a conventional jig set. As shown in FIG. 6, the conventional jig set is composed of a jig body 1, a test device adaptor 2, a jig fixing metal fitting 3, and a bolt 4.

[0004] The jig body 1 is shaped like an aluminum box and has four sides, excluding the front and back sides into which the test specimen 30 is inserted, and each of these sides has multiple bolt holes for connecting to the jig fixing bracket 3. The test apparatus adaptor 2 is in the form of a flat aluminum plate, and is provided with a number of bolt holes for fixing the jig main body 1, which is connected via a jig fixing metal fitting 3, to the test apparatus.

[0005] The jig fixing metal fitting 3 is an L-shaped metal fitting and is provided with a plurality of bolt holes for connecting to the jig body 1 and the adaptor 2 for the test device. The bolts 4 secure the jig body 1 to the jig fixing metal fitting 3, and secure the jig fixing metal fitting 3 to the test device adaptor 2. Note that bolts are also used to secure the test device adaptor 2 to the test device. In FIG. 6, the front side of the inserted test specimen 30 faces upwards, the rear side faces downwards, and a connection cable is drawn out from the rear side.

[0006] [Change in specimen direction: Figure 7] The conventional jig set is capable of being separated into individual parts so that the installation (test) direction of the specimen 30 can be changed. The individual parts are reassembled and fastened with bolts 4 to change the direction of the specimen 30.

[0007] Fig. 7 shows an example in which the test direction of the specimen 30 is changed. Fig. 7 is a schematic diagram showing an example in which the test direction of the specimen is changed. In FIG. 7(a), the front surface of the test piece 30 faces sideways, and the short side of the front surface faces the flat surface of the adaptor 2 for the test device. In FIG. 7(b), the front surface of the test piece 30 faces sideways, and the long side of the front surface faces the flat surface of the adaptor 2 for the test device.

[0008] [Related Technology] As a related prior art, there is Patent No. 3275340 "Vibration Testing Apparatus" (Patent Document 1). Patent Document 1 describes a vibration test device that tests the vibration resistance of electronic devices transported on a transport line. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent No. 3275340 Summary of the Invention [Problem to be solved by the invention]

[0010] However, the conventional jig set described above has a welded structure of a flat plate, so when a vibration test of 2000 Hz or less is performed, the natural frequency of the jig set is 1000 Hz or less. If this matches the natural frequency of the test specimen of 500 to 700 Hz, there is a problem that resonance occurs between the jig set and the test specimen, which can have an adverse effect on the vibration test.

[0011] Patent Document 1 does not disclose a configuration for preventing resonance between the jig set and the specimen in the case of vibration testing up to 2000 Hz.

[0012] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a jig set that can prevent resonance between the jig set and the test piece in the case of vibration testing up to 2000 Hz, thereby reducing adverse effects on the vibration test. [Means for solving the problem]

[0013] The present invention, which aims to solve the problems of the above-mentioned conventional examples, provides a jig set for attaching a specimen to a test apparatus, comprising a jig body formed by fixing five faces excluding the face for inserting the specimen with bolts, and a test apparatus adapter which connects the jig body to the test apparatus with bolts, the jig body and the test apparatus adapter being formed from cut-out aluminum material having a thickness of 30 mm or more and 50 mm or less, and the spacing between the bolt holes is 20 mm or more and 100 mm or less.

[0014] The present invention is characterized in that, in the above-mentioned jig set, the test apparatus adapter has a plurality of bolt holes and contacts any one of the five faces of the jig body to fix the jig body to the test apparatus.

[0015] The present invention is characterized in that, in the above-mentioned jig set, the jig body to which the specimen is attached is set so that its center of gravity is located within 50 mm from the center of the adaptor for the test device.

[0016] The present invention is characterized in that in the jig set described above, the corners of the jig body are cut or recesses are formed on the five surfaces.

[0017] The present invention is characterized in that, in the above-mentioned jig set, even if the installation direction of the specimen is changed, the position of the center of gravity of the jig body to which the specimen is attached is installed within 50 mm of the center position of the test equipment adapter. Effect of the Invention

[0018] According to the present invention, a jig set is provided which comprises a jig body formed by fixing five faces excluding the face for inserting a test specimen with bolts, and a test equipment adapter which connects the jig body to a test equipment with bolts, the jig body and the test equipment adapter being formed from cut-out aluminum material having a thickness of 30 mm or more and 50 mm or less, and the spacing between the bolt holes is 20 mm or more and 100 mm or less. This has the effect of preventing resonance between the test specimen and the jig set in vibration tests up to 2000 Hz, thereby reducing adverse effects on the test results. [Brief description of the drawings]

[0019] [Figure 1] FIG. [Diagram 2] FIG. 1 is a schematic diagram showing a state in which a specimen is attached to a test apparatus (1). [Diagram 3] FIG. 2 is a schematic diagram showing a method for installing the jig set on a test device. [Figure 4] FIG. 2 is a schematic diagram showing a state (2) in which a specimen is attached to a test apparatus. [Diagram 5] FIG. 3 is a schematic diagram showing the state (3) in which the test specimen is attached to the test apparatus. [Figure 6] FIG. 1 is a schematic diagram of a conventional jig set. [Figure 7] FIG. 1 is a schematic diagram of a jig set showing an example in which the test direction of a conventional specimen is changed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. [Outline of the embodiment] The jig set (this jig set) according to an embodiment of the present invention is used to attach a specimen to a test device, and comprises a jig body formed by fixing five faces excluding the face for inserting the specimen with bolts, and a test device adapter to which the jig body is fixed with bolts. The jig body and the test device adapter are formed from cut-out aluminum material having a thickness of 30 mm or more and 50 mm or less, and the spacing between the bolt holes is 20 mm or more and 100 mm or less, so that the specimen and the jig set do not resonate in vibration tests up to 2000 Hz, reducing the adverse effects on the test results.

[0021] In addition, the center of gravity of the jig body to which the test specimen is attached is located within 50 mm of the center of the test equipment adapter, which reduces the effect of mass imbalance during vibration testing and does not adversely affect the test results. Even within this 50 mm range, half the spacing between the bolt holes (20 mm or more and 100 mm or less) is an appropriate value.

[0022] [This jig set: Figures 1 and 2] This jig set will be described with reference to Figures 1 and 2. Figure 1 is a schematic diagram of this jig set, and Figure 2 is a schematic diagram of a state (1) in which a specimen is attached to a test device. This jig set is composed of a jig body 10, a test device adapter 20, and a bolt 4.

[0023] Each surface of the jig body 10 is fixed by a bolt 4, and the jig body 10 is attached to a test device adapter 20 by the bolts 4. Here, the bolts 4 that fix each surface of the jig body 10 are referred to as bolts 4a, the bolts 4 that fix the jig body 10 to the adapter 20 for the test device are referred to as bolts 4c, and the bolts 4 that fix the adapter 20 for the test device to the connection portion 5 of the test device 6 are referred to as bolts 4b, but bolts 4a, 4b, and 4c may be collectively referred to as bolts 4.

[0024] [Jig body 10] As shown in Fig. 1, the jig body 10 has a hollow box shape with five sides made of cut aluminum metal plates. One side of the box is open, and the side (front) serves as an insertion opening through which the test piece 30 is inserted. Although a metal plate is provided on the rear side opposite the front, there is a space for drawing out the wiring.

[0025] The metal plate has a thickness of 30 mm to 50 mm, and the distance between bolt holes 13 (described later) is 20 mm to 100 mm. It is known from experiments and CAE (Computer Aided Engineering) analysis that under these conditions, the jig body 10 and the specimen 30 do not resonate in vibration tests up to 2000 Hz.

[0026] The size of the jig set is changed depending on the size of the test piece, but the thickness of the metal plate and the distance between the bolt holes 13 are such that no resonance occurs if the above conditions are met. That is, the natural frequency of the specimen 30 is 500 to 700 Hz, and the natural frequency of the jig body 10 including the metal plate is 1000 to 2000 Hz, so that no resonance occurs.

[0027] The jig body 10 has two first surfaces 11 having the largest area, two second surfaces 12 connecting the two first surfaces 11, and a second surface 12 is also used on the back surface opposite the insertion opening. In other words, three second surfaces 12 are used.

[0028] The corner of the first surface 11 opposite the insertion opening is cut diagonally to reduce weight. In other words, the first surface 11 is a hexagon with two diagonally cut sides. The back surface opposite the insertion opening has a diagonally cut portion, making it narrower in area, and the second surface 12 is attached to the narrower portion. The wiring connected to the specimen 30 is pulled out from the space formed on the back side of the diagonally cut portion.

[0029] Both the first surface 11 and the second surface 12 are formed with a plurality of bolt holes 13, and the first surface 11 and the second surface 12 are connected by fixing them with a bolt 4 using any of the bolt holes 13, and further, the jig body 10 is fixed to an adapter 20 for a test device.

[0030] Further, in the bolt through-holes 13 in the first surface 11 and the second surface 12, storage holes (bolt through-holes) 14 for storing the heads of the bolts 4 are formed so that the heads of the bolts 4 do not protrude. In addition, the first surface 11 and the second surface 12 are formed with a plurality of recesses (concave portions) 15 to reduce weight. The depth of the recesses 15 is 20 mm or more and 40 mm or less, and the recesses do not penetrate all the way through.

[0031] [Test equipment adapter 20] The test device adaptor 20 is connected to the jig body 10 and fixes the jig body 10 to the connection portion 5 of the test device 6 . The test device adaptor 20 is an octagonal flat plate cut out of aluminum, and is provided with a number of bolt holes 22 as well as a number of storage holes 21 for storing the heads of the bolts 4b.

[0032] The storage hole 21 is provided with a bolt through hole for connecting the test device adaptor 20 to the connection portion 5 with a bolt 4b. The bolt holes 22 are for fixing the jig body 10 to the test device adaptor 20 with bolts 4c.

[0033] The flat plate of the test device adaptor 20 has a thickness of 30 mm to 50 mm, and the distance between the formed bolt holes 22 is 20 mm to 100 mm. Under these conditions, the test device adaptor 20 and the test specimen 30 do not resonate with each other in vibration tests up to 2000 Hz.

[0034] Also, a storage hole 21 is formed at the center position of the test device adapter 20 (hidden in Figs. 1 and 2, but shown in Fig. 3 described later), and the jig body 10 is installed and connected to the test device adapter 20 so that the position of the center of gravity of the jig body 10 storing the test specimen 30 calculated by CAE analysis is within 50 mm from the center position of the test device adapter 20. This makes it possible to reduce the bias of the mass during the vibration test, and does not adversely affect the test results.

[0035] [Bolt 4] The bolt 4a is a bolt for connecting the first surface 11 and the second surface 12 of the jig body 10. The bolt 4b is a bolt for connecting the jig body 10 to the adaptor 20 for the test device. The bolt 4c is a bolt for connecting the test apparatus adapter 20 to the connection portion 5 of the test apparatus 6. The bolt 4c is not shown in FIGS.

[0036] The bolt 4 is composed of a male thread 5a and a female thread 5b. The male thread 5a is inserted from the storage hole 21, passed through the bolt hole 22, and fixed to the female thread 5b provided on the opposite side. The female thread 5b is fixed to an aluminum metal plate in advance. In addition, a storage hole 21 may be provided at one end of the bolt hole 22 to store the head of the male thread 5a, and a storage hole 21 may be provided at the other end of the bolt hole 22 to store the female thread 5b portion.

[0037] [Installation method: Figure 3] A method for installing the jig set in the test apparatus 6 will be described with reference to Fig. 3. Fig. 3 is a schematic diagram showing a method for installing the jig set in the test apparatus. As shown in FIG. 3, in this jig set, first, the adaptor 20 for the test device is fixed to the connection portion 5 of the test device 6 .

[0038] Specifically, the connection part 5 is provided with a female thread 5b for fixing the bolt 4b (male thread 5a). After aligning the test equipment adapter 20, the bolt 4b is inserted into the storage hole 21, inserted into the bolt hole 22 formed within the storage hole 21, and turned into the female thread 5b to fix the bolt 4b, thereby connecting the test equipment adapter 20 to the connection part 5.

[0039] Secondly, the jig body 10 is fixed to the adaptor 20 for the test device. Specifically, in Figure 3, the jig body 10 is aligned, and the bolt 4c is inserted into the storage hole 14 that stores the bolt 4c formed on the surface of the jig body 10 that contacts the test device adapter 20, and then inserted into the bolt-through hole 13 formed within the storage hole 14. The bolt 4c is then turned and fixed into the female thread 5b provided on the back surface of the test device adapter 20 that corresponds to the bolt-through hole 13, thereby connecting the jig body 10 to the test device adapter 20. Here, the jig body 10 housing the test specimen 30 calculated by CAE analysis is installed and connected so that its center of gravity is within 50 mm from the center of the adapter 20 for the test device.

[0040] Third, the specimen 30 is fixed to the jig body 10 . Specifically, the test piece 30 with a cable is inserted through an opening in the jig body 10 for inserting the test piece 30, and is then pushed all the way in and fixed to the jig body 10 with fasteners or studs or the like.

[0041] [Installed on the test equipment (2): Figure 4] An example in which the direction in which the specimen 30 is attached to the test apparatus 6 is changed will be described with reference to Fig. 4. Fig. 4 is a schematic diagram showing a state (2) in which the specimen is attached to the test apparatus. When changing the direction of the specimen 30, the direction in which the specimen 30 is placed in the test device adaptor 20 of the jig body 10 in which the specimen 30 is housed is changed. In FIG. 4, the insertion opening for the specimen 30 faces sideways, and the test is performed with the specimen 30 laid down.

[0042] [Installed on the test equipment (3): Figure 5] An example in which the direction in which the specimen 30 is attached to the test apparatus 6 is further changed will be described with reference to Fig. 5. Fig. 5 is a schematic diagram showing a state (3) in which the specimen is attached to the test apparatus. In FIG. 5, the insertion opening for the specimen 30 faces sideways, and the test is performed with the specimen 30 in an upright position.

[0043] As described above, the orientation of the specimen 30 can be changed by changing the connection direction between the jig body 10 and the test device adapter 20, making it possible to perform testing with the specimen 30 in any orientation. Even if the orientation of the specimen 30 is changed, the jig body 10 containing the specimen 30 is set so that its center of gravity is within 50 mm from the center of the adapter 20 for the test device.

[0044] In addition, CAE analysis is repeated to optimize the shape of the jig body 10 and the shape of the test device adapter 20 so as to prevent resonance with the test specimen 30, thereby developing the optimal jig body 10 and test device adapter 20.

[0045] Furthermore, this jig set can be applied not only to vibration tests but also to impact tests, in which impacts are repeatedly applied to the specimen 30 in the same direction as in the vibration tests.

[0046] [Effects of the embodiment] This jig set is used to attach the specimen 30 to the test equipment 6, and comprises a jig body 10 formed by fixing five faces excluding the face into which the specimen 30 is inserted with bolts 4a, and a test equipment adapter 20 which connects the jig body 10 with bolts 4c, the test equipment adapter 20 being fixed to the connection portion 5 of the test equipment 6 with bolts 4b, the jig body 10 and the test equipment adapter 20 being formed from cut-out aluminum material having a thickness of 30 mm or more and 50 mm or less, and the spacing between the four bolt holes is 20 mm or more and 100 mm or less, which has the effect of reducing the possibility of the specimen 30 and this jig set resonating in vibration tests up to 2000 Hz, thereby reducing adverse effects on the test results.

[0047] Furthermore, with this jig set, the position of the center of gravity of the jig body 10 to which the specimen 30 is attached is within 50 mm of the center of the test equipment adapter 20, which has the effect of reducing the effect of mass imbalance during vibration testing and reducing adverse effects on the test results. [Industrial Applicability]

[0048] INDUSTRIAL APPLICABILITY The present invention is suitable for a jig set that can prevent resonance between the jig set and a specimen in a vibration test up to 2000 Hz, thereby reducing adverse effects on the vibration test. [Explanation of symbols]

[0049] REFERENCE SIGNS LIST 1,10...jig body, 2,20...adapter for test device, 3...fixture for fixing jig, 4,4a,4b,4c...bolt, 5...connection portion, 5a...male thread, 5b...female thread, 6...test device, 11...first surface, 12...second surface, 13...bolt through hole, 14...storage hole (bolt through hole), 15...recess (recess), 21...storage hole (bolt through hole), 22...bolt hole, 30...test specimen

Claims

1. A jig set for attaching a specimen to a test device, A jig body formed by fixing five surfaces, excluding the surface into which the specimen is inserted, with bolts; a test device adapter for connecting the jig body to the test device with a bolt; A jig set characterized in that the jig body and the test device adapter are formed from cut-out aluminum material having a thickness of 30 mm or more and 50 mm or less, and the spacing between the bolt holes is 20 mm or more and 100 mm or less.

2. The jig set according to claim 1, characterized in that the test device adapter has a plurality of bolt holes and contacts any one of five faces of the jig body to fix the jig body to the test device.

3. 3. The jig set according to claim 1, wherein the jig body, to which the specimen is attached, is installed so that the position of the center of gravity of the jig body is within 50 mm from the center position of the adaptor for the test device.

4. 3. The jig set according to claim 1, wherein the jig body has corners cut off or recesses formed on the five surfaces.

5. A jig set as described in claim 1 or 2, characterized in that even if the installation direction of the test specimen is changed, the position of the center of gravity of the jig body to which the test specimen is attached is installed within 50 mm of the center position of the test equipment adapter.

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