CN110031204B - Anti-fatigue test fixture - Google Patents
Anti-fatigue test fixture Download PDFInfo
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- CN110031204B CN110031204B CN201910407205.4A CN201910407205A CN110031204B CN 110031204 B CN110031204 B CN 110031204B CN 201910407205 A CN201910407205 A CN 201910407205A CN 110031204 B CN110031204 B CN 110031204B
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 50
- 230000002929 anti-fatigue Effects 0.000 title claims abstract description 41
- 238000012360 testing method Methods 0.000 claims abstract description 89
- 238000005452 bending Methods 0.000 claims description 32
- 230000007246 mechanism Effects 0.000 claims description 22
- 230000006835 compression Effects 0.000 description 15
- 238000007906 compression Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides an anti-fatigue test fixture, and relates to the technical field of anti-fatigue tests. The fatigue resistance test fixture comprises a driver, a telescopic piece, a fixed pressing piece and a movable pressing piece. The driver is connected with the telescopic piece, and the telescopic piece is connected with the movable pressing piece, and fixed pressing piece and the movable pressing piece are arranged at opposite intervals. The fixed pressfitting piece is used for fixing one end of the test sample, and the movable pressfitting piece is used for fixing the other end of the test sample. The movable pressing piece can move close to or far away from the fixed pressing piece under the driving of the telescopic piece so as to push and pull the test sample. The anti-fatigue test fixture is simple in structure, convenient to operate, flexible to use, high in efficiency and good in universality, and can be used for efficiently completing the anti-fatigue test of a test sample.
Description
Technical Field
The invention relates to the technical field of anti-fatigue tests, in particular to an anti-fatigue test fixture.
Background
At present, the boards such as soft boards and soft and hard boards are increasingly applied to electronic products, and the requirements of the electronic products on the bending resistance of soft board areas are also higher. If the bending resistance performance can not meet the product requirement, the whole module can be scrapped, the economic loss is large, and the customer experience can be seriously influenced.
Therefore, it is necessary to perform bending-resistant fatigue test on the plate material before shipping, and particularly, it is necessary to perform bending-resistant fatigue test on the flexible module. Most of the existing testing devices are only suitable for torsion testing or dead bending testing, and do not have the anti-fatigue testing function of stretching and bending.
Disclosure of Invention
The invention aims to provide the anti-fatigue test fixture, which can realize the anti-fatigue test of flexible bending of a flexible board area of a flexible board or a flexible-rigid board, has high test efficiency and convenient use, can effectively intercept the delivery of bad products, and improves the product yield.
The invention improves the technical problems by adopting the following technical proposal.
The invention provides an anti-fatigue test fixture which comprises a driver, a telescopic piece, a fixed pressing piece and a movable pressing piece. The driver is connected with the telescopic piece, the telescopic piece with the movable pressing piece is connected, fixed pressing piece with the relative interval of movable pressing piece sets up. The fixed pressing piece is used for fixing one end of the test sample, and the movable pressing piece is used for fixing the other end of the test sample. The movable pressing piece can move close to or away from the fixed pressing piece under the drive of the telescopic piece so as to push and pull the test sample.
Further, the telescopic piece comprises a cam mechanism and a push-pull shaft, the cam mechanism is connected with the driver, one end of the push-pull shaft is connected with the cam mechanism, and the other end of the push-pull shaft is connected with the movable pressing piece.
Further, the cam mechanism comprises a cam and a connecting arm, the cam is connected with the output end of the driver, the connecting arm is connected with the cam, and the push-pull shaft is hinged with the connecting arm.
Further, the push-pull shaft comprises a first connecting section, a second connecting section and an adjusting rod, one end of the adjusting rod is in threaded connection with the first connecting section, the other end of the adjusting rod is in threaded connection with the second connecting section, and the adjusting rod is used for adjusting the distance between the first connecting section and the second connecting section.
One end of the first connecting section, which is far away from the adjusting rod, is connected with the cam mechanism, and one end of the second connecting section, which is far away from the adjusting rod, is connected with the movable pressing piece.
Further, the fixed pressing piece comprises a fixed support and a first pressing block, wherein the first pressing block is installed on the fixed support, and the first pressing block and the fixed support are used for clamping the test sample.
Further, the fixed support comprises a main body frame, a pre-pressing cross beam and a pre-folding piece, wherein the pre-folding piece is arranged on one side of the main body frame, which is close to the movable pressing piece, and extends towards the direction of the movable pressing piece. The pre-pressing cross beam is arranged above the pre-folding piece and used for pre-pressing and attaching the test sample to the pre-folding piece.
Further, the fixed support also comprises a pre-pressing bottom plate, and the pre-pressing bottom plate is arranged on one side of the main body frame, which is close to the movable pressing piece, and extends towards the direction of the movable pressing piece; the pre-pressing bottom plate is arranged in parallel with the pre-folding piece and is positioned on one side, far away from the pre-pressing cross beam, of the pre-folding piece.
Further, the movable pressing piece comprises a movable support and a second pressing block, the second pressing block is installed on the movable support, and the second pressing block and the movable support are used for clamping the test sample.
Further, a connecting support is arranged on the movable support, and the telescopic piece is connected with the connecting support.
Further, the movable support comprises a frame, wherein a linear guide rail is arranged on the frame, and the movable support is arranged on the linear guide rail and can move along the linear guide rail.
The anti-fatigue test fixture provided by the invention has the following beneficial effects:
the anti-fatigue test fixture provided by the invention has the advantages that the fixed pressing piece is used for fixing one end of a test sample, and the movable pressing piece is used for fixing the other end of the test sample. The movable pressing piece is driven by the driver and the telescopic piece to do reciprocating motion so as to push and pull the test sample, so that the test sample performs stretching and bending cyclic motion, and fatigue resistance test is realized. The anti-fatigue test fixture is simple to operate, high in test efficiency, capable of effectively intercepting bad products and improving quality of products leaving factories.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a first view angle of an anti-fatigue testing fixture according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a test sample of the anti-fatigue test fixture according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a structure of a second view angle of the anti-fatigue testing jig according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a motion principle of a telescopic member of an anti-fatigue test fixture according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a connection structure between a second pressing block and a movable support of an anti-fatigue test fixture according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a fixing support of an anti-fatigue test fixture according to an embodiment of the present invention.
Icon: 100-an anti-fatigue test fixture; 101-a frame; 103-linear guide rails; 105-armrests; 110-a driver; 111-cams; 113-a connecting arm; 115-cam mechanism; 120-telescoping pieces; 121-push-pull shaft; 123-a first connection section; 124-a second connection section; 125-adjusting the rod; 1231-a first hinge hole; 1241-a second hinge hole; 140-fixing the pressing piece; 141-a first briquetting; 150-fixing the support; 151-a main body frame; 152-pre-flaps; 153-pre-pressing the bottom plate; 155-pre-pressing the cross beam; 156-a first bending space; 157-a second bending space; 160-a movable pressing piece; 161-a cradle; 1611-a first elastic member; 1613-pivoting the shaft; 163-connecting the brackets; 164-fixing plate; 165-connecting blocks; 166-connecting rod; 170-a second briquetting; 171-a first end; 173-a second end; 191-start button; 192-stop button; 193-reset button; 194-display screen; 200-test sample; 210-a fixed end; 230-test area; 231-a first bending section; 233-a second bending section; 235-third bending section.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship conventionally put in use of the product of the present invention, or the azimuth or positional relationship conventionally understood by those skilled in the art, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
The terms "first", "second", and the like, are used merely for distinguishing the description and have no special meaning.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed" and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a first view angle of an anti-fatigue test fixture 100 according to an embodiment of the invention, please refer to fig. 1.
The anti-fatigue test fixture 100 provided by the embodiment of the invention comprises a frame 101, and a driver 110, a telescopic member 120, a fixed pressing member 140 and a movable pressing member 160 which are arranged on the frame 101. The driver 110 is connected with the telescopic member 120, the telescopic member 120 is connected with the movable pressing member 160, and the fixed pressing member 140 and the movable pressing member 160 are arranged at opposite intervals. The fixing pressing member 140 is used for fixing one end of the test sample 200, and the movable pressing member 160 is used for fixing the other end of the test sample 200. The movable pressing member 160 can move toward or away from the fixed pressing member 140 under the driving of the telescopic member 120 to push and pull the test sample 200, so that the test sample 200 can perform reciprocating stretching and bending actions. The anti-fatigue test fixture 100 can be used for anti-fatigue test of a flexible circuit board to improve the factory yield of the flexible circuit board. Of course, the present invention is not limited to this, and may be applied to an anti-fatigue test of a soft board portion of a soft and hard board.
Fig. 2 is a schematic structural diagram of a test sample 200 of the anti-fatigue test fixture 100 according to an embodiment of the present invention, please refer to fig. 2. Specifically, the test sample 200 is exemplified by a flexible board, i.e., a flexible circuit board, whose two ends are non-bending regions, i.e., fixing ends 210, respectively fixed on the jig; the middle portion is the inflection region, namely the fatigue test area 230. In the fatigue test of the flexible circuit board, the test area 230 of the flexible circuit board is subjected to reciprocating stretching and bending actions, and when the flexible circuit board is bent, the flexible circuit board is bent to form a Z-shaped structure, as shown in fig. 2, and the Z-shaped structure comprises a first bending section 231, a second bending section 233 and a third bending section 235.
Referring to fig. 1, the fixing pressing member 140 includes a fixing support 150 and a first pressing block 141, the first pressing block 141 is mounted on the fixing support 150, and a fixing end 210 for clamping the test sample 200 is disposed between the first pressing block 141 and the fixing support 150. The movable press-fit 160 includes a movable support 161 and a second press block 170, the second press block 170 being mounted on the movable support 161, and another fixed end 210 for clamping the test sample 200 between the second press block 170 and the movable support 161. The positions of the first pressing block 141 and the second pressing block 170 correspond to each other, the first pressing block 141 and the second pressing block 170 are arranged at intervals, and a gap is reserved for accommodating the test area 230 of the test sample 200.
Fig. 3 is a schematic structural diagram of a second view angle of the anti-fatigue test fixture 100 according to an embodiment of the present invention, and fig. 4 is a schematic motion diagram of the expansion member 120 of the anti-fatigue test fixture 100 according to an embodiment of the present invention, please refer to fig. 3 and 4. The telescopic member 120 includes a push-pull shaft 121 and a cam mechanism 115, the driver 110 is connected to the cam mechanism 115, the cam mechanism 115 is connected to one end of the push-pull shaft 121, and the other end of the push-pull shaft 121 is connected to the cradle 161. The driver 110 is started to drive the cam mechanism 115 to rotate, and the cam mechanism 115 rotates to drive the push-pull shaft 121 to reciprocate, so that the movable support 161 and the second pressing block 170 on the movable support 161 are driven to reciprocate together, and the second pressing block 170 is far away from or near to the first pressing block 141. The test region 230 of the test sample 200 is bent when the second press block 170 moves close to the first press block 141, and the test region 230 of the test sample 200 is stretched when the second press block 170 moves away from the first press block 141. During the back and forth reciprocating motion of the movable press-fit 160, the test region 230 of the test specimen 200 is repeatedly stretched and bent, and an anti-fatigue test is achieved.
In the present embodiment, the driver 110 employs a rotary motor. The cam mechanism 115 includes a cam 111, a connecting arm 113, and a protection cover (not shown), the cam 111 is sleeved on an output shaft of the driver 110, the connecting arm 113 is mounted on the cam 111, and the connecting arm 113 is connected to the push-pull shaft 121. The driver 110 drives the cam 111 to rotate, and the connecting arm 113 mounted on the cam 111 rotates along with the cam 111 to drive the push-pull shaft 121 and the movable pressing member 160 to reciprocate together. Optionally, the cam 111 is disposed in a protective cover, which protects the cam 111 from foreign matters such as dust and particles falling into the cam 111.
The overall length of the push-pull shaft 121 can be adjusted to facilitate adjustment of the limit position reached by the movable press-fit 160. Specifically, the push-pull shaft 121 includes a first connection section 123, a second connection section 124, and an adjustment lever 125, one end of the first connection section 123 is provided with a first hinge hole 1231, and the other end is provided with an internal thread. The second connecting section 124 has a second hinge hole 1241 at one end and an internal thread at the other end. Both ends of the adjusting rod 125 are provided with external threads which are respectively matched with the internal threads of the first connecting section 123 and the internal threads of the second connecting section 124. One end of the first connecting section 123 provided with a first hinge hole 1231 is sleeved on the connecting arm 113 through the first hinge hole 1231, so that the first connecting section 123 is hinged with the connecting arm 113, and the other end of the first connecting section 123 is in threaded connection with one end of the adjusting rod 125. One end of the second connection section 124 is hinged to the movable support 161 through a second hinge hole 1241, and the other end is screw-coupled to the other end of the adjustment lever 125. The first connecting section 123 and the second connecting section 124 are connected through the adjusting rod 125 and are respectively in threaded connection with the adjusting rod 125, and the whole length of the push-pull shaft 121 can be adjusted through the adjusting rod 125, so that the limiting position of the movable support 161 is adjusted, and finally the pulling and pressing force, namely the bending degree and the stretching degree, of the test sample 200 in the test process are adjusted. Of course, the entire length of the push-pull shaft 121 is not limited thereto, and other structures may be employed instead of the screw adjustment method described above. For example, the push-pull shaft 121 is a multi-section sleeve sleeving structure, and the adjacent two sleeves can slide relatively to adjust the overall length of the push-pull shaft 121. After the entire length of the push-pull shaft 121 is adjusted by the relative sliding, the sleeve is fixed by a fastener such as a screw or a pin, and the sleeve is prevented from being displaced during the reciprocating motion. In addition, there are other length adjustment manners, which may be used to adjust the overall length of the push-pull shaft 121, and are not particularly limited herein.
Optionally, a connection bracket 163 is disposed on the movable support 161 near one end of the second connection section 124, the connection bracket 163 includes a fixing plate 164 and two connection blocks 165 disposed on the fixing plate 164, the fixing plate 164 is fixedly connected to the movable support 161, and a connection rod 166 is disposed between the two connection blocks 165. The second hinge hole 1241 is sleeved on the connecting rod 166, so as to realize the hinge connection between the second connecting section 124 of the push-pull shaft 121 and the movable support 161. In order to ensure the uniformity of the stress of the test sample 200 each time, the frame 101 is provided with a linear guide 103, and the movable support 161 is mounted on the linear guide 103 and moves along the linear guide 103 during the reciprocating motion, so that the movable support 161 can reciprocate along a straight line.
In this embodiment, the reciprocating linear motion of the movable support 161 is implemented by a combination of the cam mechanism 115 and the push-pull shaft 121, and in other embodiments, the reciprocating linear motion may be implemented by a crank-slider mechanism, a rack-and-pinion assembly, a linear cylinder, a screw-nut assembly, or the like, which is not particularly limited herein.
Fig. 5 is a schematic diagram of a connection structure between the second pressing block 170 and the movable support 161 of the anti-fatigue test fixture 100 according to an embodiment of the present invention, please refer to fig. 5. In this embodiment, the second press block 170 is connected to the cradle 161. Optionally, a hinge is provided on the movable support 161, and the second pressing block 170 is sleeved on the hinge 1613. The second press block 170 includes opposite first and second ends 171 and 173, and a fixed end 210 for clamping the test sample 200 between the first end 171 and the cradle 161. When a downward external force is applied to the second end 173, the first end 171 is away from the cradle 161, so that a clamping space is formed between the first end 171 and the cradle 161 to facilitate insertion of one end of the test sample 200 into the clamping space. When the external force of the second end 173 is removed, the first end 171 approaches the cradle 161, clamping the test sample 200. Optionally, a first mounting groove is formed at the second end 173, a second mounting groove is formed on the movable support 161, the position of the second mounting groove corresponds to the position of the first mounting groove, a first elastic member 1611 is disposed between the second pressing block 170 and the movable support 161, one end of the first elastic member 1611 abuts against the first mounting groove, and the other end abuts against the second mounting groove. The first elastic member 1611 may be a compression spring, so that after the external force of the second end portion 173 disappears, the first end portion 171 clamps the test sample 200 more firmly under the restoring force of the first elastic member 1611. Of course, the one end of the test sample 200 is not limited to this, and may be fixed by adhesion, bolting, or clamping, other than the above-described clamping method, and is not particularly limited.
Similarly, the first pressing block 141 is hinged to the fixing support 150, and the other fixing end 210 for clamping the test sample 200 is between the first pressing block 141 and the fixing support 150. The clamping principle is the same as that of the second pressing block 170 and the movable support 161, and will not be described again here. Of course, the fixing pressing member 140 may also be used to fix the test sample 200 by bonding, bolting or clamping, and the like, which is not limited herein.
Optionally, the fixed support 150 is provided with a plurality of first pressing blocks 141, the movable support 161 is provided with a plurality of second pressing blocks 170, and the number of the first pressing blocks 141 is the same as the number of the second pressing blocks 170, and the positions of the first pressing blocks and the second pressing blocks correspond to each other. Thus, fatigue resistance tests can be simultaneously performed on a plurality of test samples 200, and the test efficiency is improved. In this embodiment, the number of the first pressing blocks 141 and the number of the second pressing blocks 170 are six, respectively, so that the fatigue resistance test can be performed on six test samples 200 at the same time. Of course, five, eight, ten, etc. are also possible, and are not particularly limited herein.
To ensure that the zigzag bending is achieved during testing, the test specimen 200 is zigzag pre-folded prior to the test. And, a pre-pressing guide structure is provided on the fixing support 150 so as to facilitate bending of the Z-shaped structure in the test process.
Fig. 6 is a schematic structural diagram of a fixing support 150 of the anti-fatigue test fixture 100 according to an embodiment of the present invention, please refer to fig. 6. Optionally, the fixing support 150 includes a body frame 151, a pre-compression beam 155, a pre-compression bottom plate 153, and a pre-flap 152. The pre-pressing bottom plate 153 and the pre-folding piece 152 are arranged on one side of the main body frame 151 close to the movable support 161 and extend towards the direction close to the movable support 161. The pre-compression beam 155 is detachably connected to the main body frame 151, and in this embodiment, one end of the pre-compression beam 155 is connected to one side of the main body frame 151 through a bolt, and the other end of the pre-compression beam 155 is connected to the other side of the main body frame 151 through a bolt. The pre-compression cross beam 155 is close to the pre-folded piece 152 and is arranged parallel to the pre-folded piece 152, the pre-compression cross beam 155 is located above the pre-folded piece 152, and a first bending space 156 is formed between the pre-compression cross beam 155 and the pre-folded piece 152. After the flexible circuit board is mounted, the pre-pressing beam 155 is pressed on the test area 230 of the flexible circuit board, so that a part of the flexible circuit board is attached to the pre-folded piece 152, that is, the pre-folded piece 152 and the pre-pressing beam 155 guide the flexible circuit board to form a first bending section 231 of a Z-shaped structure. Because both ends of the pre-pressing cross member 155 are respectively connected with the main body frame 151 by bolts, the distance between the pre-pressing cross member 155 and the pre-folding piece 152 can be adjusted by the bolts, thereby adjusting the pre-pressing force on the test sample 200.
The pre-compression bottom plate 153 is located at a side of the pre-folding piece 152 away from the pre-compression cross beam 155, and the pre-compression bottom plate 153 and the pre-folding piece 152 are relatively parallel. A second bending space 157 is formed between the pre-compression bottom plate 153 and the pre-folded piece 152. In the process of compressing the flexible circuit board, a part of the flexible circuit board enters the second bending space 157, and the pre-bending piece 152 and the pre-pressing bottom plate 153 guide the flexible circuit board to form the second bending section 233 and the third bending section 235, so that the flexible circuit board is bent in a Z-shaped structure in the test process.
In addition, the anti-fatigue test fixture 100 further comprises a counter, and an operation button, a display screen 194 and a travel sensing piece are further arranged on the frame 101. The operation buttons include a start button 191, a stop button 192, and a reset button 193, which are connected to the driver 110, and when the start button 191 is pressed, the driver 110 is powered on to start operation. When the stop button 192 is pressed, the drive 110 is powered off, and stops operating. Pressing the reset button 193, the cradle 161 moves to an initial position, facilitating the installation or removal of the test sample 200. The stroke sensing piece is installed on the movable support 161, and the stroke sensing piece is connected with a counter, and the counter is used for recording the reciprocating motion times of the movable support 161, so that the test times of the fatigue resistance test are recorded, and the test times are displayed on the display screen 194 in real time.
Optionally, the rack 101 is further provided with a handrail 105, so that the rack 101 can be moved conveniently, and the anti-fatigue test fixture 100 is more flexible to use and convenient to operate.
The fatigue resistance test fixture 100 provided by the invention has the following working principle:
one fixed end 210 of the test sample 200 is fixed between the first pressing block 141 and the fixed support 150, and the other fixed end 210 of the test sample 200 is fixed between the second pressing block 170 and the movable support 161. The pre-compression beam 155 is pressed against the pre-folded piece 152 to pre-compress the test specimen 200 on the pre-folded piece 152. The driver 110 is started, the driver 110 drives the cam mechanism 115 to rotate, the cam mechanism 115 drives the connecting arm 113 to rotate, the connecting arm 113 drives the push-pull shaft 121 to reciprocate, and the push-pull shaft 121 drives the movable support 161 to reciprocate back and forth along the linear guide rail 103 through the connecting bracket 163. The test sample 200 is fixed at one end of the second press block 170 and the movable support 161 to reciprocate with the movable support 161, thereby realizing cyclic stretching and compression of the test sample 200. Due to the arrangement of the pre-pressing cross beam 155, the pre-folding piece 152 and the pre-pressing bottom plate 153, the test sample 200 is bent in a Z-shaped structure in the compressed process, and the fatigue resistance test is completed. The movable support 161 is provided with a stroke sensing piece which is connected with a counter and can record the reciprocating times of the movable support 161, thereby recording the test times of the fatigue resistance test.
In summary, the anti-fatigue test fixture 100 provided by the invention has the following beneficial effects:
according to the anti-fatigue test fixture 100 provided by the invention, the driver 110 drives the cam mechanism 115 to rotate, so that the push-pull shaft 121 and the movable support 161 are driven to reciprocate, the anti-fatigue test of the test sample 200 is realized, a plurality of test samples 200 can be tested at the same time, the test efficiency is high, and the yield of products leaving a factory is effectively ensured. Secondly, the anti-fatigue test fixture 100 is not only suitable for anti-fatigue tests of flexible circuit boards and rigid-flex boards, but also can be used for tests of other products, and has wide application range and high universality.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications, combinations and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The anti-fatigue test fixture is characterized by comprising a driver, a telescopic piece, a fixed pressing piece and a movable pressing piece;
the driver is connected with the telescopic piece, the telescopic piece is connected with the movable pressing piece, and the fixed pressing piece and the movable pressing piece are oppositely arranged at intervals; the fixed pressing piece is used for fixing one end of the test sample, and the movable pressing piece is used for fixing the other end of the test sample;
the movable pressing piece can move close to or away from the fixed pressing piece under the drive of the telescopic piece so as to push and pull the test sample;
the fixed pressing piece comprises a fixed support and a first pressing block, the first pressing block is arranged on the fixed support, and the first pressing block and the fixed support are used for clamping the test sample; the fixing support comprises a main body frame, a pre-pressing cross beam, a pre-pressing bottom plate and a pre-folding piece, wherein the pre-pressing bottom plate and the pre-folding piece are arranged on one side of the main body frame, which is close to the movable pressing piece, and extend towards the direction of the movable pressing piece; the pre-pressing cross beam is arranged above the pre-folding piece and is used for pre-pressing and attaching the test sample to the pre-folding piece so as to form a first folding section of the test sample;
the pre-pressing bottom plate is arranged in parallel with the pre-folding piece and is positioned at one side of the pre-folding piece far away from the pre-pressing cross beam; the pre-bending piece and the pre-pressing bottom plate guide the test sample to form a second bending section and a third bending section;
the movable pressing piece comprises a movable support and a second pressing block, the second pressing block is arranged on the movable support, and the second pressing block and the movable support are used for clamping the test sample.
2. The fatigue test fixture according to claim 1, wherein the telescoping member comprises a cam mechanism and a push-pull shaft, the cam mechanism is connected with the driver, one end of the push-pull shaft is connected with the cam mechanism, and the other end is connected with the movable pressing member.
3. The fatigue test fixture of claim 2, wherein the cam mechanism comprises a cam and a connecting arm, the cam is connected with the output end of the driver, the connecting arm is connected with the cam, and the push-pull shaft is hinged with the connecting arm.
4. The fatigue test fixture according to claim 2, wherein the push-pull shaft comprises a first connecting section, a second connecting section and an adjusting rod, one end of the adjusting rod is in threaded connection with the first connecting section, the other end of the adjusting rod is in threaded connection with the second connecting section, and the adjusting rod is used for adjusting the distance between the first connecting section and the second connecting section;
one end of the first connecting section, which is far away from the adjusting rod, is connected with the cam mechanism, and one end of the second connecting section, which is far away from the adjusting rod, is connected with the movable pressing piece.
5. The fatigue test fixture according to claim 1, wherein the movable support is provided with a connecting bracket, and the telescopic member is connected with the connecting bracket.
6. The fatigue test fixture according to claim 1, further comprising a frame, wherein a linear guide is provided on the frame, and the cradle is mounted on the linear guide and is movable along the linear guide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910407205.4A CN110031204B (en) | 2019-05-16 | 2019-05-16 | Anti-fatigue test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910407205.4A CN110031204B (en) | 2019-05-16 | 2019-05-16 | Anti-fatigue test fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110031204A CN110031204A (en) | 2019-07-19 |
| CN110031204B true CN110031204B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910407205.4A Active CN110031204B (en) | 2019-05-16 | 2019-05-16 | Anti-fatigue test fixture |
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