CN220304996U - Light stretching clamp for nylon plate - Google Patents
Light stretching clamp for nylon plate Download PDFInfo
- Publication number
- CN220304996U CN220304996U CN202321715063.6U CN202321715063U CN220304996U CN 220304996 U CN220304996 U CN 220304996U CN 202321715063 U CN202321715063 U CN 202321715063U CN 220304996 U CN220304996 U CN 220304996U
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- Prior art keywords
- clamp
- stretching
- test piece
- groove
- piece
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- 239000004677 Nylon Substances 0.000 title claims abstract description 25
- 229920001778 nylon Polymers 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 46
- 238000009864 tensile test Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000011374 ultra-high-performance concrete Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a nylon plate light stretching clamp, which comprises: an upper clamp and a lower clamp; the upper clamp and the lower clamp are symmetrically arranged and are respectively connected with an upper stretching table and a lower stretching table of the testing machine; the opposite sides of the upper clamp and the lower clamp are respectively provided with grooves with the same shape and corresponding positions; the corners of the grooves are arc-shaped; the shape of the groove is matched with that of the tensile test piece; the notch size of the groove is matched with the size of the tensile test piece; the upper clamp and the lower clamp are both made of cast nylon. The utility model adopts cast nylon to manufacture the stretching clamp, which has light weight, can lead the test piece to bear the stretching load mainly in the test process, and avoids the influence of the excessive weight of the clamp on the axial stretching strength of the test piece; the cast nylon material is hard, has excellent pressure resistance and bending resistance, is easy to process into various shapes, has high fitting precision with a test piece during test, can bear large load when the clamp is used, has no large deformation after repeated use, and has longer service life.
Description
Technical Field
The utility model relates to a test tool, in particular to a light stretching clamp for a nylon plate.
Background
The tensile property of ultra-high performance concrete is closely related to the crack resistance, and is an important parameter to be considered in the design of some concrete structures, such as bridge decks, water tanks, retaining dams and the like.
The tensile strength of the ultra-high performance concrete is generally obtained through a splitting strength test or conversion of an empirical formula related to compressive strength, and the method is difficult to effectively characterize the real tensile strength and tensile deformation of the ultra-high performance concrete. Therefore, the prior art generally adopts an axle center tensile test of the ultra-high performance concrete to determine the mechanical property of the ultra-high performance concrete.
However, in the conventional axial tensile test, the tensile clamp is generally made of steel. When a tensile test piece made of ultra-high performance concrete is pulled in the test process, the weight of the steel clamp below is born, and the tensile test is started after the load is balanced. Due to the density of 7850kg/m 3 The left and right sides, the weight of the steel clamp is large, and the initial cracks appear on the test piece before the tensile test formally starts, even the test piece is directly pulled apart, and the accuracy of the test result is affected.
Disclosure of Invention
In order to solve the problems, the utility model discloses a nylon plate light stretching clamp.
The utility model discloses a nylon plate light stretching clamp, which comprises: an upper clamp and a lower clamp;
the upper clamp and the lower clamp are symmetrically arranged and are respectively connected with an upper stretching table and a lower stretching table of the testing machine;
the opposite sides of the upper clamp and the lower clamp are respectively provided with grooves with the same shape and corresponding positions;
the corners of the grooves are arc-shaped;
the shape of the groove is matched with that of the tensile test piece;
the notch size of the groove is matched with the size of the tensile test piece;
the upper clamp and the lower clamp are both made of cast nylon.
Preferably, the stretching jig further comprises: an upper connection hole, a lower connection hole, an upper steel connection piece and a lower steel connection piece;
the upper connecting hole is arranged at one end of the upper clamp, which is connected with the upper stretching table;
the lower connecting hole is arranged at one end of the lower clamp, which is connected with the lower stretching table;
the upper steel connecting piece passes through the upper connecting hole, one end of the upper steel connecting piece is connected with the upper clamp, and the other end of the upper steel connecting piece is connected with the upper stretching table;
the lower steel connecting piece passes through the lower connecting hole, one end of the lower steel connecting piece is connected with the lower clamp, and the other end of the lower steel connecting piece is connected with the lower stretching table.
Optionally, the thickness of one side of the upper clamp connected with the upper stretching table is 60-70 mm;
optionally, a thickness of a side of the lower clamp connected with the lower stretching table is 60-70 mm.
Optionally, the thickness of the two side edges of the upper clamp is 50-60 mm;
optionally, the thickness of the two side edges of the lower clamp is 50-60 mm.
Optionally, the width of the groove is 105-110 mm.
Optionally, the height of the groove is 105-110 mm.
Optionally, the diameters of the upper connecting hole and the lower connecting hole are 40-50 mm.
Compared with the prior art, the utility model has the following beneficial effects:
(1) The casting nylon is adopted to manufacture the stretching clamp, so that the weight of the casting nylon is lighter, a test piece can mainly bear a stretching load in the test process, the influence of the excessive weight of the clamp on the axial stretching strength of the test piece is avoided, and the accuracy of test data is ensured;
(2) The cast nylon has high crystallinity, hard self material, excellent pressure resistance, wear resistance and bending resistance, is easy to process into various shapes, is convenient to process, has higher fitting precision with a test piece during test, can bear larger load when the clamp is used, has no larger deformation after repeated use, and has longer service life;
(3) According to the utility model, the corners are arranged in the arc shape, so that the damage of the test piece caused by the local loading of the test piece can be effectively avoided, and the accuracy of the test result is influenced.
Drawings
FIG. 1 is a schematic structural view of a lightweight nylon sheet stretching jig of the present utility model.
In the figure, 1 is a groove of an upper clamp; 2 is an upper connecting hole; 3 is an angular aperture; 4 is the side of the upper clamp; 5 is an arc section of the lower clamp; 6 is the top edge of the upper clamp; 7 is a lower connecting hole; 8 is the bottom edge of the lower clamp.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.
The utility model discloses a nylon plate light stretching clamp, which comprises: an upper clamp and a lower clamp;
the upper clamp and the lower clamp are made of cast nylon, and the density is 1150kg/m only 3 Left and right. In this embodiment, the upper and lower clamps are each cut from a cast nylon sheet having a thickness of 50mm to 150mm and a shape as shown in fig. 1. The upper clamp and the lower clamp are both used for fixing the tensile test piece and transmitting load in the test process.
The utility model adopts cast nylon to manufacture the stretching clamp, which has lighter weight, can lead the test piece to bear the stretching load mainly in the test process, and avoids the influence of the excessive weight of the clamp on the axial stretching strength of the test piece.
The upper clamp and the lower clamp are symmetrically arranged and are respectively connected with an upper stretching table and a lower stretching table of the testing machine;
in this embodiment, the upper and lower clamps are connected to the upper and lower stretching tables by pins via steel connectors having pin holes. In other embodiments, the upper and lower clamps may be connected by connectors, bolts or screw-thread steel made of other materials such as iron and copper.
Optionally, the thickness of the side of the upper clamp that is connected to the upper stretching table (top side 4 in fig. 1) is 60-70 mm;
alternatively, the thickness of the side (bottom side 7 in fig. 1) of the lower clamp to which the lower stretching stage is connected is 60 to 70mm.
Optionally, the thickness of the two side edges 4 of the upper clamp is 50-60 mm;
optionally, the thickness of both sides of the lower clamp is 50-60 mm.
The opposite sides of the upper clamp and the lower clamp are respectively provided with a groove 1 with the same shape and corresponding position;
the shape of the groove 1 is matched with the shape of the tensile test piece. The notch size of the groove 1 is matched with the size of the tensile test piece;
the stretching clamp is made of the cast nylon, the cast nylon has high crystallinity, is hard in self material, has excellent pressure resistance, wear resistance and bending resistance, is easy to process into various shapes, and is convenient to process;
according to the utility model, the grooves 1 are arranged on the upper clamp and the lower clamp relatively, the shape of the groove 1 is arranged according to the standard size of the test piece, the fitting precision of the groove 1 and the test piece is higher during the test, the clamp can bear larger load during the use, and the clamp has no larger deformation after repeated use, and has longer service life.
Alternatively, the width of the groove 1 is 105-110 mm.
Alternatively, the height of the groove 1 is 105-110 mm.
The width and the height of the groove 1 are set in the range, so that the matching degree with the test piece is optimal, the test piece can mainly bear tensile load, and the test result is more accurate.
In one embodiment, as shown in fig. 1, the groove 1 is divided into an upper part and a lower part, the shape of the upper part is similar to that of Chinese characters 'eight', and two sides of the upper part are arc-shaped sections 5; the lower part is rectangular in shape and is provided with corner holes 3 at the corners where the upper part meets the lower part. Preferably, the longitudinal length of the arc-shaped section 5 is 80-85 mm; the diameter of the corner hole 3 is 5-8 mm.
The longitudinal length of the arc-shaped section 5, the diameter of the angular hole 3 and the coordinates of the points on the arc-shaped section 5 are referred to in the diagram A.1 of the group standard Ultra High Performance Concrete (UHPC) technical requirement T/CECS 10107-2020.
The corner of the groove 1 is arc-shaped, and the corner is provided with the corner hole 3, so that local damage of stress at the corner of the tensile test piece can be effectively avoided, and the error of the test result is larger.
Preferably, the stretching jig further comprises: an upper connection hole 2, a lower connection hole 7, an upper steel connection piece and a lower steel connection piece;
the upper steel connecting piece passes through the upper connecting hole 2 to connect the upper clamp with the upper stretching table through a pin bolt;
the lower steel connecting piece passes through the lower connecting hole 7 to connect the lower clamp with the lower stretching table through a pin bolt;
alternatively, the diameters of the upper and lower connection holes 2 and 7 are 40 to 50mm.
In this embodiment, the main function of the upper and lower connection holes 2 and 7 is to facilitate the steel connection member to pass through, and to fix the upper and lower clamps to the testing machine. The embodiment is provided with the steel connecting piece and the connecting hole to connect the upper clamp and the lower clamp with the corresponding stretching table, so that the utility model is convenient to detach, repair and replace different test pieces, and is suitable for more scenes.
Compared with the prior art, the utility model has the following beneficial effects:
(1) The casting nylon is adopted to manufacture the stretching clamp, so that the weight of the casting nylon is lighter, a test piece can mainly bear a stretching load in the test process, the influence of the excessive weight of the clamp on the axial stretching strength of the test piece is avoided, and the accuracy of test data is ensured;
(2) The cast nylon has high crystallinity, hard self material, excellent pressure resistance, wear resistance and bending resistance, is easy to process into various shapes, is convenient to process, has higher fitting precision with a test piece during test, can bear larger load when the clamp is used, has no larger deformation after repeated use, and has longer service life;
(3) According to the utility model, the corners are arranged in the arc shape, so that the damage of the test piece caused by the local loading of the test piece can be effectively avoided, and the accuracy of the test result is influenced.
The foregoing description is only a few examples of the present application and is not intended to limit the present application in any way, and although the present application is disclosed in the preferred examples, it is not intended to limit the present application, and any person skilled in the art may make some changes or modifications to the disclosed technology without departing from the scope of the technical solution of the present application, and the technical solution is equivalent to the equivalent embodiments.
Claims (7)
1. A nylon sheet lightweight stretching jig, comprising: an upper clamp and a lower clamp;
the upper clamp and the lower clamp are symmetrically arranged and are respectively connected with an upper stretching table and a lower stretching table of the testing machine;
the opposite sides of the upper clamp and the lower clamp are respectively provided with grooves with the same shape and corresponding positions;
the corners of the grooves are arc-shaped;
the shape of the groove is matched with that of the tensile test piece;
the notch size of the groove is matched with the size of the tensile test piece;
the upper clamp and the lower clamp are both made of cast nylon.
2. The stretching clamp of claim 1, further comprising: an upper connection hole, a lower connection hole, an upper steel connection piece, and a lower steel connection piece;
the upper connecting hole is arranged at one end of the upper clamp, which is connected with the upper stretching table;
the lower connecting hole is arranged at one end of the lower clamp, which is connected with the lower stretching table;
the upper steel connecting piece passes through the upper connecting hole, one end of the upper steel connecting piece is connected with the upper clamp, and the other end of the upper steel connecting piece is connected with the upper stretching table;
the lower steel connecting piece passes through the lower connecting hole, one end of the lower steel connecting piece is connected with the lower clamp, and the other end of the lower steel connecting piece is connected with the lower stretching table.
3. The stretching jig according to claim 1, wherein a thickness of a side of the upper jig connected to the upper stretching stage is 60 to 70mm;
the thickness of one side of the lower clamp connected with the lower stretching table is 60-70 mm.
4. The stretching jig according to claim 1, wherein the thickness of both side edges of the upper jig is 50 to 60mm;
the thickness of the two side edges of the lower clamp is 50-60 mm.
5. The stretching clamp of claim 1, wherein the groove has a width of 105-110 mm.
6. Stretching clamp according to claim 1, characterized in that the height of the groove is 105-110 mm.
7. The stretching jig according to claim 2, wherein the diameters of the upper and lower connection holes are each 40 to 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321715063.6U CN220304996U (en) | 2023-07-03 | 2023-07-03 | Light stretching clamp for nylon plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321715063.6U CN220304996U (en) | 2023-07-03 | 2023-07-03 | Light stretching clamp for nylon plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220304996U true CN220304996U (en) | 2024-01-05 |
Family
ID=89348748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321715063.6U Active CN220304996U (en) | 2023-07-03 | 2023-07-03 | Light stretching clamp for nylon plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220304996U (en) |
-
2023
- 2023-07-03 CN CN202321715063.6U patent/CN220304996U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |