CN213779749U - Three-point bending deflection measuring device - Google Patents
Three-point bending deflection measuring device Download PDFInfo
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- CN213779749U CN213779749U CN202022729323.8U CN202022729323U CN213779749U CN 213779749 U CN213779749 U CN 213779749U CN 202022729323 U CN202022729323 U CN 202022729323U CN 213779749 U CN213779749 U CN 213779749U
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- threaded rod
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- 238000013001 point bending Methods 0.000 title claims abstract description 32
- 238000005452 bending Methods 0.000 claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model relates to a mechanical device, more specifically relate to a three point bending amount of deflection measuring device, the amount of deflection of mainly used dynamic measurement sample in three point bending test. The device includes crooked pressure head, base, extensometer, range finding support, and specific structure is as follows: the bending pressure head is of a fixed rod and pressure head up-down combined structure, the distance measuring support is of a concave support and threaded rod up-down combined structure, a threaded hole is formed in the bottom surface of the concave base, and the threaded rod is in threaded connection with the threaded hole; the upper end of the threaded rod is connected with the bottom surface of the concave support, the tops of the two sides of the concave support are symmetrically provided with a support 45-degree knife edge corresponding to one end of the extensometer, and the two sides of the top end of the bottom of the pressure head are symmetrically provided with a pressure head 45-degree knife edge corresponding to the other end of the extensometer. The utility model has the advantages of simple integral structure, compare the amount of deflection of traditional three point bending device distance measurement sample that can push down through the pressure head to reach the purpose of the real-time amount of deflection of output sample.
Description
Technical Field
The utility model relates to a mechanical device, more specifically relate to a three point bending amount of deflection measuring device, the amount of deflection of mainly used dynamic measurement sample in three point bending test.
Background
The traditional three-point bending device can only measure the result after the three-point bending experiment, but cannot dynamically measure the dynamic deflection of the sample under the three-point bending condition for deeper analysis. With the development of material science, researchers pay attention to the result of the material after service, and pay more attention to the deformation behavior of the material under dynamic load, so that a three-point bending clamp aiming at the problems is needed to be invented.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a three point bending deflection measuring device, its simple structure, the practicality is strong, low cost, and can guarantee better experiment precision
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a three point bending deflection measuring device, the device includes crooked pressure head, base, extensometer, range finding support, and concrete structure is as follows:
the bending pressure head is of a fixed rod and pressure head up-down combined structure, the distance measuring support is of a concave support and threaded rod up-down combined structure, a threaded hole is formed in the bottom surface of the concave base, and the threaded rod is in threaded connection with the threaded hole; the upper end of the threaded rod is connected with the bottom surface of the concave support, the tops of the two sides of the concave support are symmetrically provided with a support 45-degree knife edge corresponding to one end of the extensometer, and the two sides of the top end of the bottom of the pressure head are symmetrically provided with a pressure head 45-degree knife edge corresponding to the other end of the extensometer.
The three-point bending deflection measuring device is characterized in that a bending pressure head and a concave base are arranged up and down oppositely, a sample is horizontally arranged at the top tips of the two sides of the concave base, so that two supporting points are formed between the concave base and the bottom surface of the sample, the bottom tip of the pressure head corresponds to the central line of the top surface of the sample, and a downward pressing stress point is formed between the pressure head and the top surface of the sample.
In the three-point bending deflection measuring device, the vertical surface of a 45-degree knife edge of the pressure head is positioned at the inner side, the inclined surface is positioned at the outer side, and the opening is downward; the vertical surface of the 45-degree knife edge of the bracket is positioned on the inner side, the inclined surface is positioned on the outer side, and the opening is arranged on the side.
The three-point bending deflection measuring device adopts one or two extensometers.
The three-point bending deflection measuring device is characterized in that the threaded rod and the base are fixed through an upper nut and a lower nut.
The three-point bending deflection measuring device is characterized in that a fixed rod on the upper portion of a bending pressure head is fixed through an upper fixture of a fatigue machine, and a threaded rod of a distance measuring support is fixed through a lower fixture of the fatigue machine.
The utility model has the advantages and beneficial effects that:
1. the utility model has the advantages of simple integral structure, compare the amount of deflection of traditional three point bending device distance measurement sample that can push down through crooked pressure head to reach the purpose of the real-time amount of deflection of output sample.
2. The utility model discloses the distance of ranging support and crooked pressure head is adjusted to the rotatory threaded rod of accessible before the installation extensometer to find the position that is fit for fixed extensometer, and the available nut of ranging support is fixed in on the base.
3. The utility model discloses it has the same 45 edge of a knife to open on crooked pressure head and range finding support to guarantee that the extensometer can fix and accurately measure the amount of deflection.
Drawings
FIG. 1 is a three-dimensional assembly drawing of a three-point bending deflection measuring device.
Fig. 2 is a three-point view of a three-point bending deflection measuring apparatus, in which: (a) front view, (b) left view, and (c) top view.
Fig. 3 is a partially enlarged view of the three-point bending deflection measuring apparatus.
In the figure: 1-bending pressure head, 11-fixing rod, 12-pressure head, 13-pressure head 45-degree knife edge, 14-tip, 2-sample, 3-base, 4-extensometer, 5-ranging bracket, 51-bracket, 52-threaded rod, 53-bracket 45-degree knife edge and 6-nut.
Detailed Description
The invention will be described in detail with reference to the following description and embodiments, which are given by way of illustration in the accompanying drawings:
as shown in fig. 1-3, the three-point bending deflection measuring device of the present invention comprises the following components: crooked pressure head 1, sample 2, base 3, extensometer 4, range finding support 5, the concrete structure is as follows:
the bending pressure head 1 and the concave base 3 are arranged up and down oppositely, the bending pressure head 1 is of an upper and lower combined structure of a fixed rod 11 and a pressure head 12, the sample 2 is horizontally arranged at the top tips of the two sides of the concave base 3, so that two supporting points are formed between the concave base 3 and the bottom surface of the sample 2, the bottom tip 14 of the pressure head 12 corresponds to the central line of the top surface of the sample 2, and a lower pressure stress point is formed between the pressure head 12 and the top surface of the sample 2.
The distance measuring bracket 5 is an upper and lower combined structure of a concave bracket 51 and a threaded rod 52, a threaded hole is formed in the bottom surface of the concave base 3, the threaded rod 52 is in threaded connection with the threaded hole, and the threaded rod 52 and the concave base 3 are fixed through an upper nut 6 and a lower nut 6; the upper end of the threaded rod 52 is connected with the bottom surface of the concave support 51, the tops of the two sides of the concave support 51 are symmetrically provided with a support 45-degree knife edge 53 corresponding to one end of the extensometer 4, and the two sides of the top end 14 of the bottom of the pressure head 12 are symmetrically provided with a pressure head 45-degree knife edge 13 corresponding to the other end of the extensometer 4.
Wherein, the vertical surface of the 45-degree pressure head knife edge 13 is positioned at the inner side, the inclined surface is positioned at the outer side, and the opening is downward; the vertical surface of the 45-degree knife edge 53 of the bracket is positioned on the inner side, the inclined surface is positioned on the outer side, and the opening is arranged on the side; one or two extensometers 4 are adopted according to the requirement, and when the two extensometers are used, the average value can be obtained, so that the measured deflection is more accurate.
The utility model discloses in, range finding support 5 can be fixed to the screw hole that 3 bottom surfaces of base set up to adjust the initial distance between range finding support 5 and the crooked pressure head 1, base 3 can support sample 2 in three point bending test simultaneously.
The utility model discloses in, threaded rod 52 of 5 lower parts of range finding support installs in the screw hole department of base 3, reciprocates through rotatory threaded rod 52, can adjust the distance of range finding support 5 and crooked pressure head 1, and the part that the threaded rod 52 lower extreme exposes is fixed with anchor clamps on tired machine. A45-degree knife edge is formed on the bracket 51 at the upper part of the distance measuring bracket 5, so that the extensometer 4 can be conveniently installed.
The utility model discloses in, dead lever 11 on 1 upper portion of crooked pressure head is the metal pole, and the fatigue machine of being convenient for fastens and crooked loading test. A45-degree knife edge is formed on the pressure head 12 at the lower part of the bending pressure head 1, and the knife edge is completely the same as that of the distance measuring support 5 and used for installing the extensometer 4.
The working process of the utility model is as follows:
when a three-point bending test is performed on the sample 2, first, the fixing rod 11 at the upper part of the bending ram 1 is fixed by the upper jig of the fatigue machine so as to be movable only up and down. The threaded rod 52 at the lower part of the distance measuring bracket 5 is matched with the base 3, the distance is adjusted, and the distance is fixed by the nut 6. The threaded rod 52 of the distance measuring stand 5 is then fixed with the lower clamp of the fatigue machine. The sample 2 is then placed on the base 3 and the distance between the bending ram 1 and the sample 2 is adjusted to just touch. The extensometer 4 is fixed on the knife edges of the bending pressure head 1 and the distance measuring support 5, and if the extensometer 4 cannot be tightly installed, the distance between the distance measuring support 5 and the bending pressure head 1 can be adjusted by rotating the threaded rod 52 on the distance measuring support 5.
The result shows, the utility model discloses can be used for the dynamic deflection of dynamic measurement sample under three point bending to carry out deeper material scientific research.
Claims (6)
1. The utility model provides a three point bending deflection measuring device which characterized in that, the device includes crooked pressure head, base, extensometer, range finding support, and concrete structure is as follows:
the bending pressure head is of a fixed rod and pressure head up-down combined structure, the distance measuring support is of a concave support and threaded rod up-down combined structure, a threaded hole is formed in the bottom surface of the concave base, and the threaded rod is in threaded connection with the threaded hole; the upper end of the threaded rod is connected with the bottom surface of the concave support, the tops of the two sides of the concave support are symmetrically provided with a support 45-degree knife edge corresponding to one end of the extensometer, and the two sides of the top end of the bottom of the pressure head are symmetrically provided with a pressure head 45-degree knife edge corresponding to the other end of the extensometer.
2. A three point bending deflection measuring device as defined in claim 1 wherein the bending ram is positioned opposite the concave base from top to bottom, the test specimen is positioned horizontally on top of the concave base at the top of the concave base such that two support points are formed between the concave base and the bottom of the test specimen, the bottom of the ram is positioned opposite the centerline of the top of the test specimen such that a lower pressure stress point is formed between the ram and the top of the test specimen.
3. A three point bending deflection measuring device as defined in claim 1 wherein the 45 ° edge of the ram is located on the inside in elevation, on the outside in inclination and open to the side down; the vertical surface of the 45-degree knife edge of the bracket is positioned on the inner side, the inclined surface is positioned on the outer side, and the opening is arranged on the side.
4. A three point bending deflection measuring device according to claim 1, wherein one or two extensometers are used.
5. A three point bending deflection measuring device as defined in claim 1, wherein the threaded rod is secured to the base by upper and lower nuts.
6. A three point bending deflection measuring device as defined in claim 1, wherein the fixed rod on the upper part of the bending ram is fixed by the upper clamp of the fatigue machine and the threaded rod of the distance measuring stand is fixed by the lower clamp of the fatigue machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022729323.8U CN213779749U (en) | 2020-11-23 | 2020-11-23 | Three-point bending deflection measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022729323.8U CN213779749U (en) | 2020-11-23 | 2020-11-23 | Three-point bending deflection measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213779749U true CN213779749U (en) | 2021-07-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022729323.8U Active CN213779749U (en) | 2020-11-23 | 2020-11-23 | Three-point bending deflection measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213779749U (en) |
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2020
- 2020-11-23 CN CN202022729323.8U patent/CN213779749U/en active Active
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