CN116499893A - Bending test device and method for detecting bending resistance of composite material - Google Patents
Bending test device and method for detecting bending resistance of composite material Download PDFInfo
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- CN116499893A CN116499893A CN202310638667.3A CN202310638667A CN116499893A CN 116499893 A CN116499893 A CN 116499893A CN 202310638667 A CN202310638667 A CN 202310638667A CN 116499893 A CN116499893 A CN 116499893A
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- 238000001514 detection method Methods 0.000 abstract description 7
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
Abstract
The invention discloses a bending test device and a test method for detecting bending resistance of a composite material, relates to the technical field of test devices, and solves the problems that the efficiency of placing samples one by one is low, and the length of two ends of the sample needs to be measured by using measurement equipment when the samples are placed. A bending test device for detecting bending resistance of a composite material comprises a test device body, wherein a sample placing table is arranged on the outer surface of the test device body. According to the invention, a plurality of samples can be placed on the automatic sample replacing mechanism, in the process of using the equipment, the detected samples can be automatically replaced through the automatic sample replacing mechanism, and the positions of the samples can be automatically positioned through the automatic sample positioning mechanism in the replacing process, so that the detection efficiency, the detection accuracy and the convenience of the equipment are improved through the technical scheme.
Description
Technical Field
The invention relates to the technical field of testing devices, in particular to a bending testing device and a testing method for detecting bending resistance of a composite material.
Background
The matrix materials of the composite materials are divided into two main types of metal and nonmetal, and aluminum, magnesium, copper, titanium and alloys thereof are commonly used as metal matrixes. The non-metal matrix mainly comprises synthetic resin, rubber, ceramics, graphite, carbon and the like, the reinforcing material mainly comprises glass fiber, carbon fiber, boron fiber, aramid fiber, silicon carbide fiber, asbestos fiber, whisker and metal, in the process of developing the novel composite material, in order to obtain various values of the novel composite material, various different equipment is required to be used for detecting different aspects of the novel composite material, for example, when the bending resistance of the composite material is detected, a material bending mechanical property machine is required to be used for detecting the bending resistance of the composite material, and the material bending mechanical property machine can also be called as a bending test device for detecting the bending resistance of the composite material;
however, in the existing bending test device with bending resistance, the stress surface is different due to deformation of the sample in the test process, so as to influence the test operation and the test result, and the patent number CN204988904U, named as a device for testing the bending performance of a plate, solves the above problems by adopting a mode of controlling the gap between clamps and the stress surface through rotating the supporting surface, so as to improve the accuracy.
However, when the novel bending test device with bending resistance is used, the samples can be placed on the equipment one by one, the detection efficiency is low, and when the samples are placed on the equipment, the length of two sides of the samples is required to be measured by using a vernier caliper or other measuring devices, so that the center point of the bottom end of the samples can be aligned with the center point of the upper end surface of the sample placing table, and the placing mode is low in efficiency and low in precision; therefore, the existing requirements are not met, and a bending test device and a test method for detecting the bending resistance of the composite material are provided.
Disclosure of Invention
The invention aims to provide a bending test device and a test method for detecting bending resistance of a composite material, which are used for solving the problems that when the novel bending test device for detecting the bending resistance is used, samples can only be placed on equipment one by one, the detection efficiency is low, and when the samples are placed on the equipment, the lengths of two sides of the samples are required to be measured by using a vernier caliper or other measuring devices, so that the center point of the bottom end of the samples can be aligned with the center point of the upper end surface of a sample placing table, and the placing mode is low in efficiency, low in precision and the like.
In order to achieve the above purpose, the present invention provides the following technical solutions: the bending test device for detecting the bending resistance of the composite material comprises a test device body, wherein a sample placing table is arranged on the outer surface of the test device body, a lower pressure head is arranged above the sample placing table, an automatic sample replacing mechanism is arranged behind the sample placing table, and an automatic sample positioning mechanism is fixedly arranged at four end corners of the upper end surface of the automatic sample replacing mechanism;
the automatic sample replacing mechanism comprises a driving mechanism, a rack transmission mechanism and four sample placing boxes, wherein one sample is placed in each sample placing box, the four sample placing boxes can be moved between a sample placing table and a lower pressure head in turn through the driving mechanism, and the bottom ends of samples in the sample placing boxes between the sample placing table and the lower pressure head are attached to the upper end face of the sample placing table;
the four automatic sample positioning mechanisms comprise a transmission mechanism and two positioning clamps, the two positioning clamps on the same automatic sample positioning mechanism are inserted into two sides of the inside of the same sample placing box, and when the sample placing box moves to one side of the sample placing table, the transmission mechanism on the automatic sample positioning mechanism closest to the sample placing box is connected with the rack transmission mechanism, so that the two positioning clamps are pushed inwards simultaneously.
Preferably, the driving mechanism comprises a cylindrical metal shell, a stepping motor, a circular turntable, an inclined rectangular groove, an inclined panel, a transmission rotating shaft, an inclined fixing groove, a storage groove, an inclined fixing block, a fixing spring and a connecting rod, wherein the cylindrical metal shell is fixed on one side of the testing device body, the stepping motor is arranged on one side of the inside of the cylindrical metal shell, and an output shaft of the stepping motor is connected with the transmission rotating shaft through a coupling.
Preferably, four end corners of the outer surface of the transmission rotating shaft are respectively provided with an inclined plane fixing groove, the inside of the cylindrical metal shell is provided with a storage groove corresponding to the position of the inclined plane fixing groove, the inside of the storage groove is provided with an inclined plane fixing block, the surface of the inclined plane fixing block, which faces the inclined plane fixing groove, is clamped into the inside of the inclined plane fixing groove, and a fixing spring is connected between the inclined plane fixing block and the inner wall of the storage groove.
Preferably, the upper end face of the transmission rotating shaft is fixedly provided with a circular rotating table, four end corners on the outer side of the circular rotating table are respectively provided with a sample placing box, the lower end face of the sample placing box is provided with square through holes, two connecting rods are symmetrically arranged on two sides between the sample placing box and the circular rotating table, the connecting rods are connected with the circular rotating table through the rotating shaft, and the faces, facing the sample placing boxes, of the connecting rods are fixed with the sample placing boxes.
Preferably, a bevel board is arranged between the sample placing table and the circular turntable, two sides of the upper end face of the bevel board are inclined planes, an inclined plane rectangular groove is formed in the surface, facing the circular turntable, of the sample placing box, the shape of the inclined plane rectangular groove is matched with that of the top end of the bevel board, and the top end of the bevel board is clamped into the inside of the inclined plane rectangular groove on the outer surface of the sample placing box above the top end of the bevel board.
Preferably, the rack transmission mechanism comprises a lower rack and an upper rack, the lower rack is positioned on the upper side of the surface of the inclined panel, which faces the circular turntable, the upper rack is arranged below the lower rack, the lower end surface of the lower rack is provided with a tooth head only on the front half section, and the upper end surface of the upper rack is provided with a tooth head only on the rear half section.
Preferably, the four transmission mechanisms comprise arc-shaped metal shells, gear transmission rotating shafts, bevel gears A, bevel gears B, rotating shafts, bevel gears A, straight gears A, screw transmission rotating shafts, screws, inner thread sleeves, hemispherical fixing grooves, metal balls, springs and transmission gears, the four gear transmission rotating shafts are respectively located at four end angles of the outer surface of the circular rotary table, the transmission gears are arranged on the outer surface fixing sleeves of the gear transmission rotating shafts on the outer sides of the circular rotary table, the transmission gears closest to the bevel panels are located between the lower racks and the upper racks, and tooth heads of the transmission gears are matched with tooth grooves on the lower racks and the upper racks at the same time.
Preferably, one end of the gear transmission rotating shaft is inserted into the circular rotating table, a bevel gear A is arranged at the top end of the gear transmission rotating shaft inserted into the circular rotating table, a bevel gear B is meshed with the bevel gear A, the shaft center of the bevel gear B is connected with a rotating shaft, the top end of the rotating shaft is inserted into the arc-shaped metal shell, a bevel gear A is arranged at the top end of the rotating shaft inserted into the arc-shaped metal shell, a bevel gear B is meshed with the bevel gear A, a short rotating shaft is fixedly arranged at the shaft center of the bevel gear B, a spur gear B is fixedly arranged on one side of the bevel gear B and positioned on the outer surface of the short rotating shaft, a spur gear A is meshed with one side of the spur gear B, two screw transmission rotating shafts are symmetrically and fixedly connected with one side of the spur gear A, a screw is arranged on the outer side of the screw transmission rotating shaft, an inner thread sleeve connected with the screw is sleeved on one side of the outer surface of the screw, and the surface facing the inner thread sleeve is fixedly arranged between the inner thread sleeve and the inner thread sleeve.
Preferably, a plurality of metal balls are arranged at four end corners of the outer surface of the screw transmission rotating shaft, hemispherical fixing grooves corresponding to the positions of the metal balls are uniformly formed in the inner wall of the screw, the metal balls are clamped into the hemispherical fixing grooves, and a spring is connected to one side of the outer surface of the metal balls.
A, a method for operating a bending test device for detecting bending resistance of a composite material, wherein the method comprises the following steps; a sample is placed in the four sample placement boxes, then a stepping motor is started, a transmission rotating shaft connected with the sample placement boxes can be driven to rotate by the stepping motor, when the transmission rotating shaft rotates, a round rotary table arranged at the top end of the sample placement boxes can also rotate along with the transmission rotating shaft, when the round rotary table rotates, the sample placement boxes connected with the round rotary table through a connecting rod also rotate along with the round rotary table, when one sample placement box moves to one side of the inclined plate to be contacted with the inclined plate, and the stepping motor further pushes upwards when the stepping motor continues to rotate, the top end of the inclined plate is inserted into the inclined rectangular groove arranged on the outer surface of the sample placement box along with the movement of the sample placement box pushed upwards, and the sample placement box is lowered in the inserting process, and the bottom end of the sample positioned in the sample placement box is contacted with the upper end surface of the sample placement table along with the lowering of the sample placement box;
step B, performing a step B; in the process of rotating the transmission rotating shaft, the inclined surface fixing blocks clamped in the inclined surface fixing grooves on the outer surface of the transmission rotating shaft can be pushed outwards, the inclined surface fixing blocks can squeeze the fixing springs in the process of being pushed outwards, and as the interval angle between each inclined surface fixing groove is ninety degrees, each time the transmission rotating shaft rotates ninety degrees, the four inclined surface fixing blocks are respectively clamped in the inclined surface fixing grooves different from the original inclined surface fixing grooves, so that the transmission rotating shaft is fixed;
step C; when the round turntable rotates clockwise, the transmission gear positioned on the outer side also moves along with the round turntable, when the transmission gear moves to one side of the lower rack and the round turntable continues to rotate, the transmission gear is meshed with the lower rack and rotates clockwise along with the rotation of the round turntable, when the transmission gear rotates, the bevel gear A is driven to rotate, the bevel gear A drives the bevel gear B and the bevel gear A to rotate, the bevel gear A drives the bevel gear B and the spur gear B (518) to rotate, the spur gear B drives the spur gear A to synchronously rotate along with the spur gear A, the metal ball of the screw transmission rotating shaft is clamped into the hemispherical fixing groove of the screw, so that the screw and the screw transmission rotating shaft synchronously rotate, when the screw rotates, the inner thread sleeve which is sleeved on the outer surface of the screw and is connected with the screw through threads, but cannot rotate, moves inwards along with the outer surface of the screw, and the positioning clamps fixed with the screw also move inwards along with the movement of the screw, when two positioning clamps positioned inside the same sample placement box simultaneously move inwards, the two positioning clamps automatically adjust the positions of the sample positioned between the two positioning clamps, so that the sample positioning clamps move anticlockwise, and the sample placement point of the sample placement box is aligned with the sample placement center point of the sample positioning box, and the sample placement box is positioned between the sample positioning boxes, and the sample positioning box is positioned anticlockwise, and the sample positioning point is opposite to the sample positioning platform, and the sample positioning platform is positioned on the sample positioning platform, and rotates, and the sample positioning platform positioning device;
step D, performing step D; when both ends of the locating clamp are attached to the sample, but the screw transmission rotating shaft for driving the screw to rotate is further rotated, a plurality of hemispherical fixing grooves are formed in the inner wall of the screw, a plurality of metal balls connected with the springs and clamped into the hemispherical fixing grooves are arranged on the outer surface of the screw transmission rotating shaft, the screw transmission rotating shaft drives the screw to rotate through the metal balls clamped into the hemispherical fixing grooves, and when the locating clamp cannot be moved inwards again, the metal balls are pushed inwards when the screw transmission rotating shaft is rotated, so that the springs are extruded, and at the moment, the rotating screw transmission rotating shaft can not drive the screw to rotate continuously.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the four end corners on the outer side of the circular turntable are respectively provided with one sample placing box, when samples are placed, one sample can be placed in the four sample placing boxes respectively, after the samples are detected by using equipment, the samples can be automatically replaced by the automatic sample replacing mechanism, in the detection process, the detected samples can be taken out, and new samples are placed in, so that the detection efficiency of the equipment is improved by the technical scheme;
2. according to the invention, in the process of replacing the sample, the two positioning clamps automatically move inwards to hold the sample between the two positioning clamps, so that the middle point of the lower end surface of the positioning clamp can be aligned to the center point of the upper end surface of the sample placing table, and the convenience and the detection accuracy of the device are improved through the technical scheme.
Drawings
FIG. 1 is a schematic diagram of the overall mechanism of the present invention;
FIG. 2 is a front view of the overall structure of the automatic sample exchange mechanism of the present invention in partial internal view;
FIG. 3 is a side view of the internal structure of FIG. 2A in accordance with the present invention;
FIG. 4 is a side view of the automatic sample changing mechanism of the present invention;
FIG. 5 is a side view of the automatic sample exchange mechanism of the present invention without the cylindrical metal housing and circular turret;
FIG. 6 is a side view of the internal structure of FIG. 4B in accordance with the present invention;
FIG. 7 is a top view of the internal structure of FIG. 6 at C in accordance with the present invention;
fig. 8 is a side view of the internal structure of fig. 7D in accordance with the present invention.
In the figure: 1. a testing device body; 2. a sample placement stage; 3. a lower pressure head; 4. an automatic sample replacing mechanism; 401. a cylindrical metal housing; 402. a stepping motor; 403. a circular turntable; 404. a sample placement cartridge; 405. an inclined rectangular groove; 406. a bevel panel; 407. a lower rack; 408. a rack is arranged; 409. a transmission rotating shaft; 410. an inclined surface fixing groove; 411. a storage groove; 412. an inclined plane fixing block; 413. a fixed spring; 414. a connecting rod; 5. an automatic sample positioning mechanism; 501. an arc-shaped metal housing; 502. a gear drive shaft; 503. bevel gear a; 504. bevel gear B; 505. a rotating shaft; 506. bevel gears A; 507. spur gear a; 508. a screw drive spindle; 509. a screw; 510. an internal thread sleeve; 511. a positioning clamp; 512. hemispherical fixing grooves; 513. a metal ball; 514. a spring; 515. a transmission gear; 516. a short rotating shaft; 517. bevel gear B; 518. spur gear B.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1 to 6, an embodiment of the present invention provides: the bending test device for detecting the bending resistance of the composite material comprises a test device body 1, wherein a sample placing table 2 is arranged on the outer surface of the test device body 1, a lower pressure head 3 is arranged above the sample placing table 2, an automatic sample replacing mechanism 4 is arranged behind the sample placing table 2, and an automatic sample positioning mechanism 5 is fixedly arranged at four end corners of the upper end surface of the automatic sample replacing mechanism 4;
the automatic sample replacing mechanism 4 comprises a driving mechanism, a rack transmission mechanism and four sample placing boxes 404, wherein one sample is placed in each sample placing box 404, the four sample placing boxes 404 can be moved between the sample placing table 2 and the lower pressure head 3 in turn through the driving mechanism, and the bottom end of the sample in the sample placing box 404 positioned between the sample placing table 2 and the lower pressure head 3 is attached to the upper end surface of the sample placing table 2;
the four sample automatic positioning mechanisms 5 comprise a transmission mechanism and two positioning clamps 511, the two positioning clamps 511 on the same sample automatic positioning mechanism 5 are inserted into two sides of the interior of the same sample placing box 404, and when the sample placing box 404 moves to one side of the sample placing table 2, the transmission mechanism on the sample automatic positioning mechanism 5 closest to the sample placing box 404 is connected with the rack transmission mechanism, so that the two positioning clamps 511 are pushed inwards simultaneously.
Further, the driving mechanism comprises a cylindrical metal housing 401, a stepping motor 402, a circular turntable 403, an inclined rectangular groove 405, an inclined panel 406, a transmission rotating shaft 409, an inclined fixing groove 410, a receiving groove 411, an inclined fixing block 412, a fixing spring 413 and a connecting rod 414, wherein the cylindrical metal housing 401 is fixed on one side of the testing device body 1, the stepping motor 402 is arranged on one side of the inside of the cylindrical metal housing 401, and an output shaft of the stepping motor 402 is connected with the transmission rotating shaft 409 through a coupling; four end corners of the outer surface of the transmission rotating shaft 409 are respectively provided with an inclined surface fixing groove 410, a containing groove 411 corresponding to the inclined surface fixing groove 410 is arranged in the cylindrical metal shell 401, an inclined surface fixing block 412 is arranged in the containing groove 411, the surface, facing the inclined surface fixing groove 410, of the inclined surface fixing block 412 is clamped into the inside of the inclined surface fixing groove 410, and a fixing spring 413 is connected between the inclined surface fixing block 412 and the inner wall of the containing groove 411; the upper end face of the transmission rotating shaft 409 is fixedly provided with a circular rotating table 403, four end corners on the outer side of the circular rotating table 403 are respectively provided with a sample placing box 404, the lower end face of the sample placing box 404 is provided with square through holes, two connecting rods 414 are symmetrically arranged on two sides between the sample placing box 404 and the circular rotating table 403, the connecting rods 414 are connected with the circular rotating table 403 through the rotating shaft, and the face, facing the sample placing box 404, on the connecting rods 414 is fixed with the sample placing box 404; a bevel board 406 is arranged between the sample placing table 2 and the circular turntable 403, two sides of the upper end face of the bevel board 406 are inclined planes, a bevel rectangular groove 405 is arranged on the surface, facing the circular turntable 403, of the sample placing box 404, the shape of the bevel rectangular groove 405 is matched with that of the top end of the bevel board 406, and the top end of the bevel board 406 is clamped into the inside of the bevel rectangular groove 405 on the outer surface of the sample placing box 404 above the bevel rectangular groove; the rack transmission mechanism comprises a lower rack 407 and an upper rack 408, wherein the lower rack 407 is positioned on the upper side of the surface of the inclined panel 406 facing the circular turntable 403, the upper rack 408 is arranged below the lower rack 407, the lower end surface of the lower rack 407 is provided with a tooth head only on the front half section, and the upper end surface of the upper rack 408 is provided with a tooth head only on the rear half section;
working principle: when the device is used, the use condition of each mechanism is checked, the device is moved to a working area and connected with a power supply, one sample is placed in the four sample placement boxes 404 respectively, then a stepping motor 402 is started, a transmission rotating shaft 409 connected with the sample placement boxes is driven to rotate by the stepping motor 402, a round rotary table 403 positioned at the top end of the transmission rotating shaft 409 rotates, when the round rotary table 403 rotates, the sample placement boxes 404 connected with the round rotary table 403 through a connecting rod 414 also rotate, when one sample placement box 404 moves to one side of the inclined plate 406 to be contacted with the inclined plate, the sample placement boxes 404 are pushed upwards when the stepping motor 402 continues to rotate, the top end of the inclined plate 406 is inserted into the inclined rectangular groove 405 positioned on the outer surface of the sample placement box 404 along with the movement of the pushed sample placement box 404, and the sample placement box 404 descends along with the descent of the sample placement box 404 in the insertion process, and the bottom end of the sample positioned in the sample placement box is contacted with the upper end surface of the sample placement platform 2;
in the process of rotating the transmission rotating shaft 409, the inclined plane fixing blocks 412 clamped in the inclined plane fixing grooves 410 on the outer surface of the transmission rotating shaft 409 are pushed outwards, the inclined plane fixing blocks 412 are extruded to fix the springs 413 in the process of being pushed outwards, and as the interval angle between each inclined plane fixing groove 410 is ninety degrees, each time the transmission rotating shaft 409 rotates ninety degrees, the four inclined plane fixing blocks 412 are respectively clamped into the inner parts of the inclined plane fixing grooves 410 different from the original inclined plane fixing grooves 410, so that the transmission rotating shaft 409 is fixed, and the inclined plane plate 406 is accurately clamped into the inner parts of the inclined plane rectangular grooves 405 through the technical scheme, so that the accuracy of the automatic sample replacing mechanism 4 is improved.
Further, each of the four transmission mechanisms comprises an arc-shaped metal shell 501, a gear transmission rotating shaft 502, a bevel gear A503, a bevel gear B504, a rotating shaft 505, a bevel gear A506, a straight gear A507, a screw transmission rotating shaft 508, a screw 509, an internal thread sleeve 510, a hemispherical fixing groove 512, a metal ball 513, a spring 514 and a transmission gear 515, wherein the four gear transmission rotating shafts 502 are respectively positioned at four end angles of the outer surface of the circular turntable 403, the transmission gear 515 is fixedly sleeved on the outer surface of the gear transmission rotating shaft 502 positioned at the outer side of the circular turntable 403, the transmission gear 515 closest to the bevel panel 406 is positioned between the lower rack 407 and the upper rack 408, and tooth heads of the transmission gear 515 are simultaneously matched with tooth grooves on the lower rack 407 and the upper rack 408; one end of the gear transmission rotating shaft 502 is inserted into the circular rotating table 403, a bevel gear A503 is arranged at the top end of the gear transmission rotating shaft 502 inserted into the circular rotating table 403, a bevel gear B504 is meshed with the bevel gear A503, the shaft center of the bevel gear B504 is connected with a rotating shaft 505, the top end of the rotating shaft 505 is inserted into the arc-shaped metal shell 501, a bevel gear A506 is arranged at the top end of the rotating shaft 505 inserted into the arc-shaped metal shell 501, a bevel gear B517 is meshed with the bevel gear A506, a short rotating shaft 516 is fixedly arranged at the shaft center of the bevel gear B517, a spur gear B518 is fixedly arranged on one side of the bevel gear B517 and positioned on the outer surface of the short rotating shaft 516, a spur gear A507 is meshed with one side of the spur gear B518, two screw transmission rotating shafts 508 are symmetrically and fixedly connected with two sides of the spur gear A507, a screw 509 is arranged on the outer side of the screw transmission rotating shaft 508, one side of the screw 509 is sleeved with an inner thread sleeve 510 connected with the screw thread of the screw transmission rotating shaft, and the surface facing the inner thread sleeve 510 on the positioning clamp 511 is fixedly arranged between the inner thread sleeve 510 and the inner thread sleeve 510; the four end corners of the outer surface of the screw transmission rotating shaft 508 are respectively provided with a plurality of metal balls 513, the inner wall of the screw 509 is uniformly provided with hemispherical fixing grooves 512 corresponding to the positions of the metal balls 513, the metal balls 513 are clamped into the hemispherical fixing grooves 512, and one side of the outer surface of the metal balls 513 is connected with springs 514;
when the round turntable 403 rotates clockwise, the transmission gear 515 positioned on the outer side also moves along with the round turntable 403, when the transmission gear 515 moves to one side of the lower rack 407 and the round turntable 403 continues to rotate, the transmission gear 515 is meshed with the lower rack 407 and rotates clockwise along with the rotation of the round turntable 403, when the transmission gear 515 rotates, the bevel gear A503 is driven to rotate, the bevel gear A503 drives the bevel gear B504 and the bevel gear A506 to rotate, the bevel gear A506 drives the bevel gear B517 and the straight gear B518 to rotate, the straight gear B518 drives the straight gear A507, the screw transmission rotating shaft 508 rotates synchronously along with the straight gear A507, and a metal ball 513 of the screw transmission rotating shaft 508 is clamped into a hemispherical fixing groove 512 of the screw 509, so that the screw 509 and the screw transmission rotating shaft 508 synchronously rotate; when both ends of the positioning clamp 511 are attached to the sample, but the screw transmission rotating shaft 508 for driving the screw 509 to rotate is still continuously rotating, a plurality of hemispherical fixing grooves 512 are formed in the inner wall of the screw 509, a plurality of metal balls 513 connected with springs 514 and clamped into the hemispherical fixing grooves 512 are formed in the outer surface of the screw transmission rotating shaft 508, the screw transmission rotating shaft 508 drives the screw 509 to rotate through the metal balls 513 clamped into the hemispherical fixing grooves 512, and when the positioning clamp 511 cannot continuously move inwards any more, but the screw transmission rotating shaft 508 is still rotating, the metal balls 513 are pushed inwards so as to squeeze the springs 514, and at the moment, the rotating screw transmission rotating shaft 508 cannot drive the screw 509 to continuously rotate.
A method of operating a bending test device for detecting bending resistance of a composite material comprising the steps of:
step A: a sample is placed in the four sample placement boxes 404, then the stepping motor 402 is started, the transmission rotating shaft 409 connected with the sample placement boxes 404 can be driven to rotate by the stepping motor 402, when the transmission rotating shaft 409 rotates, the round turntable 403 positioned at the top end of the sample placement boxes 404 can also rotate along with the transmission rotating shaft, when the round turntable 403 rotates, the sample placement boxes 404 connected with the round turntable 403 through the connecting rod 414 also rotate along with the round turntable, when one sample placement box 404 moves to one side of the inclined panel 406 to be contacted with the sample placement boxes, and the stepping motor 402 further rotates, the sample placement boxes 404 are pushed upwards, the top ends of the inclined panel 406 are inserted into the inclined rectangular grooves 405 positioned on the outer surface of the sample placement boxes 404 along with the movement of the sample placement boxes 404, and the bottom ends of the samples positioned in the sample placement boxes 404 are contacted with the upper end surface of the sample placement platform 2 along with the descent of the sample placement boxes 404;
step B, performing a step B; in the process of rotating the transmission rotating shaft 409, the inclined plane fixing blocks 412 clamped in the inclined plane fixing grooves 410 on the outer surface of the transmission rotating shaft 409 are pushed outwards, the inclined plane fixing blocks 412 can squeeze the fixing springs 413 in the process of being pushed outwards, and as the interval angle between each inclined plane fixing groove 410 is ninety degrees, each time the transmission rotating shaft 409 rotates ninety degrees, the four inclined plane fixing blocks 412 are respectively clamped in the inside of the inclined plane fixing grooves 410 different from the original inclined plane fixing grooves, so that the transmission rotating shaft 409 is fixed;
step C; when the round turntable 403 rotates clockwise, the transmission gear 515 positioned on the outer side also moves along with the round turntable 403, when the transmission gear 515 moves to one side of the lower rack 407 and the round turntable 403 continues to rotate, the transmission gear 515 is meshed with the lower rack 407 and rotates clockwise along with the rotation of the round turntable 403, when the transmission gear 515 rotates, the bevel gear A503 is driven to rotate, the bevel gear A503 drives the bevel gear B504 and the bevel gear A506 to rotate, the bevel gear A506 drives the bevel gear B517 and the straight gear B518 to rotate, the straight gear B518 drives the straight gear A507, the screw transmission rotating shaft 508 rotates synchronously along with the straight gear A507, and a metal ball 513 of the screw transmission rotating shaft 508 is clamped into a hemispherical fixing groove 512 of the screw 509, so that the screw 509 and the screw transmission rotating shaft 508 synchronously rotate;
step D, performing step D; when both ends of the positioning clamp 511 are attached to the sample, but the screw transmission shaft 508 for driving the screw 509 to rotate is still continuously rotating, a plurality of hemispherical fixing grooves 512 are formed in the inner wall of the screw 509, a plurality of metal balls 513 connected with springs 514 and clamped into the hemispherical fixing grooves 512 are formed in the outer surface of the screw transmission shaft 508, the screw transmission shaft 508 drives the screw 509 to rotate through the metal balls 513 clamped into the hemispherical fixing grooves 512, and when the positioning clamp 511 cannot continuously move inwards any more, but the screw transmission shaft 508 is still rotating, the metal balls 513 are pushed inwards to press the springs 514, and at the moment, the rotating screw transmission shaft 508 cannot drive the screw 509 to continuously rotate.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. Bending test device for detecting bending resistance of composite materials, comprising a test device body (1), characterized in that: the automatic test device is characterized in that a sample placing table (2) is arranged on the outer surface of the test device body (1), a lower pressure head (3) is arranged above the sample placing table (2), an automatic sample replacing mechanism (4) is arranged behind the sample placing table (2), and an automatic sample positioning mechanism (5) is fixedly arranged at four end corners of the upper end face of the automatic sample replacing mechanism (4);
the automatic sample replacing mechanism (4) comprises a driving mechanism, a rack transmission mechanism and four sample placing boxes (404), wherein one sample is placed in each sample placing box (404), the four sample placing boxes (404) can be moved between the sample placing table (2) and the lower pressure head (3) in turn through the driving mechanism, and the bottom end of the sample in the sample placing box (404) between the sample placing table (2) and the lower pressure head (3) is attached to the upper end face of the sample placing table (2);
the four automatic sample positioning mechanisms (5) comprise a transmission mechanism and two positioning clamps (511), the two positioning clamps (511) located on the same automatic sample positioning mechanism (5) are inserted into two sides of the inside of the same sample placing box (404), and when the sample placing box (404) moves to one side of the sample placing table (2), the transmission mechanism on the automatic sample positioning mechanism (5) closest to the sample placing box (404) is connected with the rack transmission mechanism, so that the two positioning clamps (511) are pushed inwards simultaneously.
2. A bending test apparatus for detecting bending resistance of a composite material according to claim 1, wherein: the driving mechanism comprises a cylindrical metal shell (401), a stepping motor (402), a circular turntable (403), an inclined rectangular groove (405), an inclined panel (406), a transmission rotating shaft (409), an inclined fixing groove (410), a containing groove (411), an inclined fixing block (412), a fixing spring (413) and a connecting rod (414), wherein the cylindrical metal shell (401) is fixed on one side of the testing device body (1), the stepping motor (402) is mounted on one side of the inner portion of the cylindrical metal shell (401), and an output shaft of the stepping motor (402) is connected with the transmission rotating shaft (409) through a coupling.
3. A bending test apparatus for detecting bending resistance of a composite material according to claim 2, wherein: four end angles of transmission pivot (409) surface all are equipped with an inclined plane fixed slot (410), the inside of cylindrical metal casing (401) is equipped with accomodate groove (411) corresponding with inclined plane fixed slot (410) position, the inside of accomodating groove (411) is equipped with inclined plane fixed block (412), the inside of inclined plane fixed slot (410) is gone into towards the face card of inclined plane fixed block (412) in inclined plane fixed block (410), be connected with a fixed spring (413) between inclined plane fixed block (412) and the inner wall of accomodating groove (411).
4. A bending test apparatus for detecting bending resistance of a composite material according to claim 2, wherein: the device is characterized in that a round rotary table (403) is fixedly arranged on the upper end face of the transmission rotary shaft (409), one sample placing box (404) is arranged at four end corners on the outer side of the round rotary table (403), square through holes are formed in the lower end face of the sample placing box (404), two connecting rods (414) are symmetrically arranged on two sides between the sample placing box (404) and the round rotary table (403), the connecting rods (414) are connected with the round rotary table (403) through the rotary shaft, and the faces, facing the sample placing box (404), of the connecting rods (414) are fixed with the sample placing box (404).
5. A bending test apparatus for detecting bending resistance of a composite material according to claim 4, wherein: the sample placing table is characterized in that an inclined plate (406) is arranged between the sample placing table (2) and the circular turntable (403), two sides of the upper end face of the inclined plate (406) are inclined faces, an inclined rectangular groove (405) is formed in the face, facing the circular turntable (403), of the sample placing box (404), the shape of the inclined rectangular groove (405) is matched with that of the top end of the inclined plate (406), and the top end of the inclined plate (406) is clamped into the inside of the inclined rectangular groove (405) on the outer surface of the sample placing box (404) above the inclined plate.
6. A bending test apparatus for detecting bending resistance of a composite material according to claim 5, wherein: the rack transmission mechanism comprises a lower rack (407) and an upper rack (408), wherein the lower rack (407) is positioned on the inclined panel (406) towards the upper side of the surface of the circular turntable (403), the upper rack (408) is arranged below the lower rack (407), the lower end surface of the lower rack (407) is provided with a tooth head only in the first half section, and the upper end surface of the upper rack (408) is provided with a tooth head only in the second half section.
7. A bending test apparatus for detecting bending resistance of a composite material according to claim 5, wherein: the four transmission mechanisms comprise an arc-shaped metal shell (501), a gear transmission rotating shaft (502), a bevel gear A (503), a bevel gear B (504), a rotating shaft (505), a bevel gear A (506), a straight gear A (507), a screw transmission rotating shaft (508), a screw (509), an internal thread sleeve (510), a hemispherical fixing groove (512), a metal ball (513), a spring (514) and a transmission gear (515), wherein the four gear transmission rotating shafts (502) are respectively positioned at four end angles of the outer surface of the circular turntable (403), the transmission gear (515) is arranged on the outer surface fixing sleeve of the gear transmission rotating shaft (502) at the outer side of the circular turntable (403), the transmission gear (515) closest to the bevel panel (406) is positioned between the lower rack (407) and the upper rack (408), and tooth heads of the transmission gear (515) are simultaneously matched with tooth grooves on the lower rack (407) and the upper rack (408).
8. A bending test apparatus for detecting bending resistance of a composite material according to claim 7, wherein: one end of the gear transmission rotating shaft (502) is inserted into the circular rotating table (403), a bevel gear A (503) is arranged at the top end of the gear transmission rotating shaft (502) inserted into the circular rotating table (403), a bevel gear B (504) is meshed with the bevel gear A (503), the shaft center of the bevel gear B (504) is connected with a rotating shaft (505), the top end of the rotating shaft (505) is inserted into the arc-shaped metal shell (501), a bevel gear A (506) is arranged at the top end of the rotating shaft (505) inserted into the arc-shaped metal shell (501), a bevel gear B (517) is meshed with the bevel gear A (506), a short rotating shaft (516) is fixedly arranged at the shaft center of the bevel gear B (517), a spur gear B (518) is fixedly arranged on one side of the bevel gear B (517) and is fixedly provided with a spur gear B (507), two screw transmission rotating shafts (508) are symmetrically and fixedly connected with two sides of the spur gear A (507), a screw (509) is arranged on the outer side of the screw transmission rotating shaft (508), a (509) is meshed with a bevel gear B (517), a short rotating shaft (517), a is fixedly provided with a short rotating shaft (516), one side of the bevel gear B (517) is fixedly provided with a) and the outer surface of the spur gear B (516) is fixedly provided with a and the spur gear B (518), and the spur gear is fixedly provided with a and the other side of the spur gear (518) is fixedly provided with a and the spur (518) and the spur (and the other side. The surface of the locating clamp (511) facing the internal thread sleeve (510) is fixed with the internal thread sleeve (510).
9. A bending test apparatus for detecting bending resistance of a composite material according to claim 8, wherein: four end angles of the outer surface of the screw transmission rotating shaft (508) are respectively provided with a plurality of metal balls (513), the inner wall of the screw (509) is uniformly provided with hemispherical fixing grooves (512) corresponding to the positions of the metal balls (513), the metal balls (513) are clamped into the hemispherical fixing grooves (512), and one side of the outer surface of each metal ball (513) is connected with a spring (514).
10. A method of operating a bending test device for detecting bending resistance of a composite material comprising the steps of:
step A; a sample is placed in the four sample placement boxes (404), then a stepping motor (402) is started, a transmission rotating shaft (409) connected with the sample placement boxes can be driven to rotate through the stepping motor (402), when the transmission rotating shaft (409) rotates, a round rotary table (403) positioned at the top end of the sample placement boxes can rotate along with the rotation of the round rotary table (403), when the round rotary table (403) rotates, the sample placement boxes (404) connected with the round rotary table (403) through a connecting rod (414) also rotate along with the rotation of the round rotary table, when one sample placement box (404) moves to one side of the inclined plate (406) to be contacted with the inclined plate, and when the stepping motor (402) continues to rotate, the sample placement box (404) can be pushed upwards, along with the movement of the sample placement box (404) pushed upwards, the top end of the inclined plate (406) can be inserted into the inclined rectangular groove (405) positioned at the outer surface of the sample placement box (404), and along with the lowering of the sample placement box (404), the bottom end of the sample placement box (404) positioned in the sample placement box can be contacted with the sample placement table (2);
step B, performing a step B; in the rotating process of the transmission rotating shaft (409), inclined surface fixing blocks (412) clamped in inclined surface fixing grooves (410) on the outer surface of the transmission rotating shaft (409) are pushed outwards, the inclined surface fixing blocks (412) squeeze fixing springs (413) in the outwards pushing process, and as the interval angle between each inclined surface fixing groove (410) is ninety degrees, each time the transmission rotating shaft (409) rotates ninety degrees, four inclined surface fixing blocks (412) are respectively clamped in the inclined surface fixing grooves (410) different from the original inclined surface fixing grooves, so that the transmission rotating shaft (409) is fixed;
step C; when the round turntable (403) rotates clockwise, the transmission gear (515) positioned on the outer side also moves along with the round turntable (403), when the transmission gear (515) moves to one side of the lower rack (407) and the round turntable (403) continues to rotate, the transmission gear (515) is meshed with the lower rack (407) and rotates clockwise along with the rotation of the round turntable (403), when the transmission gear (515) rotates, the bevel gear A (503) is driven to rotate, the bevel gear A (503) drives the bevel gear B (504) and the bevel gear A (506) to rotate, the bevel gear A (506) drives the bevel gear B (517) and the straight gear B (518) to rotate, the straight gear B (518) drives the straight gear A (507), the screw transmission rotating shaft (508) rotates synchronously along with the straight gear A (507), the metal balls (513) of the screw transmission rotating shaft (508) are clamped into the hemispherical fixing grooves (512) of the screw transmission shaft (509) so that the screw (509) rotates synchronously with the screw transmission shaft (508), when the transmission gear (509) rotates, the screw transmission shaft (509) rotates synchronously, the screw transmission shaft (509) is connected with the screw transmission shaft (509) in a rotating sleeve can not rotate along with the inner thread (509) and can not rotate along with the screw transmission shaft (509), the positioning clamps (511) fixed with the screw (509) move inwards along with the movement of the screw, when two positioning clamps (511) positioned in the same sample placing box (404) move inwards at the same time, the positions of samples positioned between the two positioning clamps are automatically adjusted, so that the center point of the bottom surface of the samples is aligned with the center point of the top end of the sample placing table (2), and when the transmission gear (515) passes through the lower rack (407), the transmission gear is meshed with the upper rack (408), so that the rotating shaft (505) is driven to rotate anticlockwise, and when the rotating shaft (505) rotates anticlockwise, the two positioning clamps (511) move outwards at the same time, so that the positioning of the samples is relieved;
step D, performing step D; when both ends of the locating clamp (511) are attached to the sample, but the screw transmission rotating shaft (508) for driving the screw (509) to rotate is still continuously rotated, a plurality of hemispherical fixing grooves (512) are formed in the inner wall of the screw (509), a plurality of metal balls (513) connected with springs (514) and clamped into the hemispherical fixing grooves (512) are arranged on the outer surface of the screw transmission rotating shaft (508), the screw transmission rotating shaft (508) drives the screw (509) to rotate through the metal balls (513) clamped into the hemispherical fixing grooves (512), and when the locating clamp (511) cannot continuously move inwards any more, but the screw transmission rotating shaft (508) is still rotating, the metal balls (513) are pushed inwards, so that the springs (514) are extruded, and the rotating screw transmission rotating shaft (508) can not drive the screw (509) to continuously rotate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117367998A (en) * | 2023-12-05 | 2024-01-09 | 山东悦龙橡塑科技有限公司 | Hose detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117367998A (en) * | 2023-12-05 | 2024-01-09 | 山东悦龙橡塑科技有限公司 | Hose detection device |
| CN117367998B (en) * | 2023-12-05 | 2024-02-13 | 山东悦龙橡塑科技股份有限公司 | Hose detection device |
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