CN210322564U - Novel ring-on-ring biaxial bending strength test fixture and positioning cover thereof - Google Patents
Novel ring-on-ring biaxial bending strength test fixture and positioning cover thereof Download PDFInfo
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- CN210322564U CN210322564U CN201920937079.9U CN201920937079U CN210322564U CN 210322564 U CN210322564 U CN 210322564U CN 201920937079 U CN201920937079 U CN 201920937079U CN 210322564 U CN210322564 U CN 210322564U
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Abstract
The utility model discloses a novel ring-on-ring biax bending strength test fixture and location lid thereof. An accommodating cavity is formed in the bottom of the positioning cover, and the size of the accommodating cavity corresponds to that of the test sample; the bottom of the positioning cover is provided with an installation mechanism; the top of the positioning cover is provided with a channel, and the size of the channel corresponds to that of the loading ring mounting part; the channel position is designed as follows: when the positioning cover is installed on the support ring installation part through the installation mechanism, the middle shaft of the loading ring is overlapped with the middle shaft of the support ring; the position of the containing cavity is designed as follows: when the positioning cover is installed on the supporting ring installation part through the installation mechanism, the central axis of the accommodating cavity is overlapped with the central axis of the supporting ring. The clamp comprises the positioning cover, a support ring mounting part, a loading ring and a loading ring mounting part. The utility model discloses a location lid can realize that centraxonial quick, the accurate alignment between loading ring, support ring and test sample improves the rate of accuracy of efficiency of software testing and test result, and sample piece can be accomodate to anchor clamps, prevents its sputtering.
Description
Technical Field
The utility model relates to a biax bending test instrument, especially a location lid in ring-on-ring biax bending strength test instrument to and contain the novel ring-on-ring biax bending strength test fixture of this location lid.
Background
A ring-on-ring biaxial bending test (ring-on-ring biaxial bending test) is a classic method for testing the bending strength of structural ceramics. According to the ASTM standard, the clamp consists of a loading clamp comprising a loading ring mounting part, a loading ring, and a support clamp consisting of a support ring mounting part, a support ring (as shown in fig. 1), the test specimen is positioned between the loading ring and the support ring, the relative movement of the upper and lower rings in the vertical direction produces the bending of the test specimen, the bending strength is the maximum stress of the test specimen at the time of bending fracture between the upper and lower rings.
However, the clamp design has many problems in the actual use process. Firstly, when the clamp and the sample are installed, the positioning of the middle shafts of the loading ring and the support ring is required to be accurate to 0.5% of the diameter of the support ring, the positioning of the middle shafts of the sample and the upper and lower rings is required to be accurate to 2% of the diameter of the support ring, if the offset of the centers of the loading ring, the sample and the upper and lower rings is too large, stress distribution is uneven, the fracture starting point is always located near the loading ring, and in actual operation, due to large manual alignment error, the loading ring, the lower and upper rings cannot be accurately centered. In addition, in the process of relative movement of the loading ring and the support ring, the sample is displaced, and the line or point contact stress and friction force between the upper ring and the lower ring and the sample can cause the stress concentration phenomenon, so that the sample is broken under the stress except the actual bending strength, and the experimental result is inaccurate. In addition, the device leads to the sample fracture back to be difficult to collect owing to lack the structure that holds the sample, and the experiment of the later stage of being not convenient for is gone on.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: in response to the above-identified problems, a locating cap is provided that assists in aligning the loading ring, the support ring, and the central axis of the test specimen. So as to carry out high-precision and quick alignment on the middle shafts of the loading ring, the supporting ring and the test sample.
The utility model adopts the technical scheme as follows:
a positioning cover for a ring-on-ring biaxial bending strength test fixture comprises a loading ring mounting part with a loading ring at the bottom and a support ring mounting part with a support ring at the top, wherein the two mounting parts (the loading ring mounting part and the support ring mounting part) are arranged oppositely, and the top of the support ring is used for placing a test sample; an accommodating cavity for accommodating a test sample is formed in the bottom of the positioning cover, and the size of the accommodating cavity corresponds to that of the test sample; the bottom of the positioning cover is provided with an installation mechanism for installing the positioning cover on the support ring installation part; the top of the containing cavity extends along the top direction of the positioning cover and is provided with a channel, the size of the channel corresponds to that of the loading ring mounting part, and the loading ring mounting part can axially move along the channel in the channel when being arranged in the channel; the channel position is designed as follows: when the positioning cover is installed on the support ring installation part through the installation mechanism, the center shaft of the loading ring connected with the loading ring installation part arranged in the channel is overlapped with the center shaft of the support ring connected with the support ring installation part; the position of the containing cavity is designed as follows: when the positioning cover is installed on the supporting ring installation part through the installation mechanism, the central axis of the accommodating cavity is overlapped with the central axis of the supporting ring.
The positioning cover is mounted on the supporting ring mounting part through the mounting mechanism, so that the relative position between the positioning cover and the supporting ring mounting part is determined, and further the relative position between the accommodating cavity and the supporting ring can be determined. The relative position of the loading ring and the containing cavity can be determined by arranging a channel on the positioning cover. Therefore, the relative positions of the loading ring, the supporting ring and the test sample can be determined, the middle shafts of the loading ring, the supporting ring and the test sample are aligned, the concentricity of the loading ring, the supporting ring and the test sample is improved, the alignment speed is high, the result is accurate, and errors cannot occur. The size of the containing cavity designed by the positioning cover corresponds to that of the test sample, so that the position of the test sample can be prevented from deviating in the test process, the middle shafts of the support ring, the loading ring and the test sample in the test process are kept consistent, and stress concentration is avoided to a certain extent.
Further, the mounting mechanism is designed to: when the positioning cover is installed on the supporting ring installation part, the accommodating cavity of the positioning cover forms a closed space.
The closed containing cavity can effectively prevent the broken test sample from sputtering all around.
Further, the mounting mechanism comprises at least one limiting structure which can uniquely determine the position of the positioning cover mounted on the mounting part of the support ring. Namely, the installation mechanism can uniquely determine the pose of the positioning cover on the mounting part of the support ring. It should be noted that, because of the symmetry relationship, the attitude of the object is still the same as the original attitude after the object is rotated and flipped, that is, "uniquely determined" here, only the overall attitude is considered, and the local position is not considered. For example, the circular rings are regarded as the same posture in any state of rotating around the circular mandrel.
Furthermore, one limiting structure at least surrounds the periphery of part of the support ring mounting part. Namely, the limiting structure is positioned around the mounting part of the support ring when the positioning cover is mounted.
Further, the mounting mechanism at least comprises two limiting structures which are oppositely arranged. The pose of the positioning cover can be accurately determined by the two relative positions.
In order to solve all or part of the problems, the invention also provides a novel ring-on-ring biaxial bending strength test fixture which comprises a support ring, a support ring installation part, a loading ring installation part and the positioning cover, wherein the loading ring installation part and the support ring installation part are arranged oppositely, the loading ring is installed at the bottom of the loading ring installation part, the support ring is installed at the top of the support ring installation part, the positioning cover is installed on the loading ring installation part through an installation mechanism, and the loading ring installation part is arranged in a channel of the positioning cover.
When the fixture is installed, the loading ring, the supporting ring and the middle shaft of the test sample can be quickly and accurately aligned, and the position of the test sample can be prevented from deflecting in the test process.
Further, at least one of the loading ring and the supporting ring is arranged at the middle part of the bottom of the corresponding installation part. I.e. the loading ring and/or the support ring is mounted centrally to the corresponding mounting.
And a storage cavity is formed in the top of the supporting ring mounting part. The containing cavity can collect the broken test sample.
Further, the opening of the receiving cavity is positioned in the support ring. This further ensures a stable supporting action of the support ring mounting part on the support ring.
Further, the inner diameter of the channel of the positioning cover is 0.05mm longer than the diameter of the loading ring mounting part. Therefore, the movable tolerance can be reserved between the channel and the loading ring mounting part, and the mutual abrasion is reduced.
Further, the surface of the channel of the retaining cap, and/or the side of the load ring mounting portion corresponding to the channel, is smooth.
Because the loading ring installation department needs the activity in the passageway (test process), the wearing and tearing between above-mentioned design can effectively reduce loading ring installation department and passageway, prevent that the later stage location from appearing the error.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the locating cover of the design can restrict the loading ring, the support ring and the test sample, so that the manual correction error is prevented from occurring to the middle shafts of the loading ring, the support ring and the test sample, the fixture installation and calibration time is shortened, and the test efficiency is improved.
2. The positioning cover can prevent broken sample fragments from sputtering everywhere, and has good limiting effect on the moving space of the sample fragments.
3. The fixture can ensure the stability of the loading ring, the supporting ring and the middle shaft of the test sample in the working process, and improve the test accuracy.
4. The clamp can collect broken samples, and ensures the integrity of sample fragments.
Drawings
FIG. 1 is a structural diagram of a conventional ring-on-ring biaxial bending strength test apparatus.
Fig. 2 is a structural view of the positioning cover of the present invention.
Fig. 3 is a cross-sectional view of the novel ring-on-ring biaxial bending strength test fixture of the present invention.
Fig. 4 is a perspective view of fig. 3.
The labels in the figure are: 1 is the location lid, and 1a is the location lid top, and 1b is installation mechanism, and 1c is the passageway, and 1d is for holding the chamber, and 2 is loading ring installation department, and 2a is the loading ring, and 3 is the test sample, and 4 is the support ring installation department, and 4a is the support ring, and 5 is the bracing piece.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
As shown in fig. 2, the embodiment discloses a positioning cover for a ring-on-ring biaxial bending strength test fixture, the ring-on-ring biaxial bending strength test fixture comprises a loading ring mounting part 2 with a loading ring 2a mounted at the bottom and a support ring mounting part 4 with a support ring 4a mounted at the top, the two mounting parts are arranged oppositely, and the top of the support ring 4a is used for placing a test sample 3. The bottom of the positioning cover 1 is provided with an accommodating cavity 1d for accommodating a test sample 3, and the size of the accommodating cavity 1d corresponds to that of the test sample 3, so that the test sample 3 cannot move left and right after being placed in the accommodating cavity 1 d. The bottom of the positioning cover 1 is designed with a mounting mechanism 1b for mounting the positioning cover 1 on the support ring mounting part 4. A channel 1c is formed in the top of the accommodating cavity 1d in the direction of the top 1a of the positioning cover, the size of the channel 1c corresponds to that of the loading ring mounting part 2, and when the loading ring mounting part 2 is arranged in the channel 1c, the loading ring mounting part can axially move along the channel 1c in the channel 1 c. The channel 1c position is designed as: when the positioning cover 1 is mounted on the support ring mounting part 4 by the mounting mechanism 1b, the central axis of the loading ring 2a connected with the loading ring mounting part 2 arranged in the channel 1c is overlapped (i.e. is consistent) with the central axis of the support ring 4a connected with the support ring mounting part 4; the position of the accommodation chamber 1d is designed to: when the positioning cap 1 is mounted to the support ring mounting portion 4 by the mounting mechanism 1b, the center axis of the accommodation chamber 1d overlaps the center axis of the support ring 4 a.
The following examples are described with reference to FIGS. 3-4.
Example two
The embodiment discloses a novel ring-on-ring biaxial bending strength test fixture, which comprises a loading ring installation part 2, a loading ring 2a, a support ring installation part 4, a support ring 4a and a positioning cover 1, wherein the loading ring installation part 2 and the support ring installation part 4 are arranged oppositely, the loading ring 2a is installed at the bottom of the loading ring installation part 2, the support ring 4a is installed at the top of the support ring installation part 4, and the positioning cover 1 is installed at the top of the support ring installation part 4 through an installation mechanism 1 b. On the locating cover 1, a channel 1c is provided for allowing the loading ring mounting part 2 to pass through, the size of the channel 1c corresponds to that of the loading ring mounting part 2, the loading ring mounting part 2 is arranged in the channel 1c, and the position of the channel 1c is designed as follows: when the loading ring mounting part 2 moves in the channel 1c, the central axis of the loading ring 2a is consistent with that of the supporting ring 4 a. At the bottom of the positioning cover 1, an accommodating chamber 1d for accommodating the test specimen 3 is opened. The size of the containing chamber 1d corresponds to the size of the test specimen 3. The central axis of the receiving cavity 1d is aligned with the central axis of the support ring 4a (when the positioning cap 1 is mounted on the support ring mounting part 4).
EXAMPLE III
The embodiment discloses a novel ring-on-ring biaxial bending strength test fixture, which comprises a loading ring installation part 2, a loading ring 2a, a support ring installation part 4, a support ring 4a and a positioning cover 1, wherein the diameter of the loading ring 2a is smaller than that of the support ring 4a, the support ring installation part 4 is installed on a support rod 5, the loading ring installation part 2 and the support ring installation part 4 are arranged oppositely, the loading ring 2a is installed in the middle of the bottom of the loading ring installation part 2, the support ring 4a is installed in the middle of the top of the support ring installation part 4, and the positioning cover 1 is arranged on the support ring installation part. An installation mechanism 1b is designed around the bottom of the positioning cover 1 and is used for being stably installed around the top of the loading ring installation part 2. In one embodiment, the mounting mechanism 1b comprises two opposite limiting structures, each of which surrounds a part of the circumference of the support ring mounting portion 4, and the sum of the lengths of the two limiting structures at least reaches the length of the major arc around the support ring mounting portion 4 to form a closed ring or a similar closed ring (a ring with a gap). The middle part of the bottom of the positioning cover 1 is provided with an accommodating cavity 1d, and the size of the accommodating cavity 1d corresponds to that of the test sample 3, so that the test sample 3 cannot move left and right in the accommodating cavity 1 d. The central axis of the receiving cavity 1d coincides with the central axis of the support ring 4a, so that the central axis of the test specimen 3 coincides with the central axis of the support ring 4 a. On the top 1a of the positioning cover, a channel 1c with the size corresponding to the size of the loading ring mounting part 2 is arranged at the position corresponding to the central axis of the accommodating cavity 1d, the central axis of the channel 1c is consistent with that of the accommodating cavity 1d, and the loading ring mounting part 2 is arranged in the channel 1 c. Thus, after the loading ring assembly, the supporting ring assembly and the positioning cover 1 are installed, the consistency of the central axes of the loading ring assembly, the supporting ring assembly and the positioning cover is ensured.
Example four
The embodiment discloses a novel ring-on-ring biaxial bending strength test fixture, which comprises a loading ring installation part 2, a loading ring 2a, a support ring installation part 4, a support ring 4a and a positioning cover 1, wherein the loading ring installation part 2 and the support ring installation part 4 are arranged relatively, the loading ring 2a is installed in the middle of the bottom of the loading ring installation part 2, the support ring 4a is installed in the middle of the top of the support ring installation part 4, the lower part of the positioning cover 1 is installed at the top of the support ring installation part 4, and a tenon-and-mortise structure is formed by the positioning cover and the support. In one embodiment, the positioning cap 1 has a recess formed in the middle of the bottom, and the inner diameter of the recess corresponds to the outer diameter of the support ring mounting part 4, so that when the support ring mounting part 4 is mounted in the recess, the surrounding of the recess forms a surrounding structure for the support ring mounting part 4. In the middle of this recess, further seted up and held chamber 1d, the size of this holding chamber 1d corresponds with test sample 3 to make test sample 3 can't move about in this holding chamber 1 d. And, because the recess that the bottom of position lid 1 was designed plays the closed action to holding chamber 1d for broken sample is restricted in the closed space that recess and holding chamber 1d formed in the testing process. The central axis of the accommodating cavity 1d is consistent with the central axis of the supporting ring 4 a. A channel 1c is arranged in the center of the top of the accommodating cavity 1d and faces the direction of the top 1a of the positioning cover, and the inner diameter of the channel 1c is 0.05mm larger than the diameter of the loading ring mounting part 2. The loading ring mounting part 2 is disposed in the passage 1 c.
EXAMPLE five
This embodiment is an optimization of any of the above described clamp embodiments. At least one (preferably both) of the side surface of the passage 1c of the positioning cap 1 and the side surface of the loading ring mounting portion 2 (corresponding to the inner surface of the passage 1c) is polished.
Sixth, this embodiment discloses the structure of the support ring mounting part 4 of the clamp according to any of the above embodiments. In the middle of the holder mounting portion 4, a storage chamber 4b for storing sample pieces is opened within the diameter of the holder 4 a. In one embodiment, the receiving cavity 4b is in the shape of a vertical barrel.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A positioning cover for a ring-on-ring biaxial bending strength test fixture comprises a loading ring mounting part (2) with a loading ring (2a) mounted at the bottom and a support ring mounting part (4) with a support ring (4a) mounted at the top, wherein the two mounting parts (2 and 4) are arranged oppositely, and a test sample is placed at the top of the support ring (4 a); the test device is characterized in that an accommodating cavity (1d) for accommodating a test sample is formed in the bottom of the positioning cover (1), and the size of the accommodating cavity (1d) corresponds to that of the test sample; the bottom of the positioning cover (1) is provided with an installation mechanism (1b) for installing the positioning cover (1) on the support ring installation part (4); the top (1a) of the accommodating cavity extends along the top direction of the positioning cover (1) and is provided with a channel (1c), the size of the channel (1c) corresponds to that of the loading ring mounting part (2), and the loading ring mounting part (2) can axially move along the channel (1c) in the channel (1c) when being arranged in the channel (1 c); the position of the channel (1c) is designed as follows: when the positioning cover (1) is installed on the supporting ring installation part (4) through the installation mechanism (1b), the middle shaft of a loading ring (2a) connected with the loading ring installation part (2) arranged in the channel (1c) is overlapped with the middle shaft of the supporting ring (4a) connected on the supporting ring installation part (4); the position of the accommodating cavity (1d) is designed as follows: when the positioning cover (1) is mounted on the support ring mounting part (4) through the mounting mechanism (1b), the central axis of the accommodating cavity (1d) is overlapped with the central axis of the support ring (4 a).
2. Positioning cover according to claim 1, characterized in that the mounting means (1b) are designed to: when the positioning cover (1) is installed on the supporting ring installation part (4), the accommodating cavity (1d) of the positioning cover (1) forms a closed space.
3. Positioning cover according to claim 1, characterized in that the mounting means (1b) comprise at least one stop structure which uniquely determines the position of the positioning cover (1) on the support ring mounting (4).
4. The retaining cap according to claim 3, characterized in that the mounting means (1b) comprise at least two oppositely arranged stop formations, each of which surrounds at least part of the circumference of the support ring mounting (4).
5. The utility model provides a novel ring-on-ring biax flexural strength test fixture, its includes support ring (4a), support ring installation department (4), loading ring (2a) and loading ring installation department (2), loading ring installation department (2) with support ring installation department (4) set up relatively, loading ring (2a) install in loading ring installation department (2) bottom, support ring (4a) install in support ring installation department (4) top, its characterized in that, test fixture still include according to one of claims 1-4 the location lid, location lid (1) through installation mechanism (1b) install in on loading ring installation department (2), loading ring installation department (2) set up in passageway (1c) of location lid (1).
6. The new ring-on-ring biaxial bending strength test jig according to claim 5, wherein at least one of the loading ring (2a) and the support ring (4a) is installed at the bottom center portion of the corresponding installation portion.
7. The new ring-on-ring biaxial bending strength test jig of claim 5, wherein the inner diameter of the passage (1c) of the positioning cap (1) is 0.05mm longer than the diameter of the loading ring mounting part (2).
8. The novel ring-on-ring biaxial bending strength test fixture as claimed in any one of claims 5 to 7, wherein a receiving cavity (4b) is formed at the top of the support ring mounting portion (4).
9. The new ring-on-ring biaxial bending strength test fixture as set forth in claim 8, wherein an opening of said receiving cavity (4b) is located inside said support ring (4 a).
10. A novel ring-on-ring biaxial bending strength test jig as set forth in any one of claims 5, 6, 7 and 9, wherein the surface of the passage (1c) of the positioning cap (1) and/or the side of the loading ring mounting part (2) corresponding to the passage (1c) is smooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937079.9U CN210322564U (en) | 2019-06-20 | 2019-06-20 | Novel ring-on-ring biaxial bending strength test fixture and positioning cover thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937079.9U CN210322564U (en) | 2019-06-20 | 2019-06-20 | Novel ring-on-ring biaxial bending strength test fixture and positioning cover thereof |
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| Publication Number | Publication Date |
|---|---|
| CN210322564U true CN210322564U (en) | 2020-04-14 |
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| CN201920937079.9U Active CN210322564U (en) | 2019-06-20 | 2019-06-20 | Novel ring-on-ring biaxial bending strength test fixture and positioning cover thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160866A (en) * | 2019-06-20 | 2019-08-23 | 四川大学 | A kind of novel ring-on-ring Biaxial flexturefirings test fixture and its locating cover |
-
2019
- 2019-06-20 CN CN201920937079.9U patent/CN210322564U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160866A (en) * | 2019-06-20 | 2019-08-23 | 四川大学 | A kind of novel ring-on-ring Biaxial flexturefirings test fixture and its locating cover |
| CN110160866B (en) * | 2019-06-20 | 2024-02-06 | 四川大学 | Ring-on-ring biax bending strength test fixture and location lid thereof |
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