CN221993172U - A high temperature tensile fixture for hard plastics - Google Patents
A high temperature tensile fixture for hard plastics Download PDFInfo
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- CN221993172U CN221993172U CN202323519753.7U CN202323519753U CN221993172U CN 221993172 U CN221993172 U CN 221993172U CN 202323519753 U CN202323519753 U CN 202323519753U CN 221993172 U CN221993172 U CN 221993172U
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- 229920003023 plastic Polymers 0.000 title claims abstract description 24
- 239000004033 plastic Substances 0.000 title claims abstract description 24
- 238000009864 tensile test Methods 0.000 claims abstract description 23
- 238000013459 approach Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 3
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
本申请属于塑料力学性能检测领域，特别涉及一种硬质塑料高温拉伸夹具，连接座，其固定端固定在拉力试验机上，其自由端上具有与试样所受的拉伸载荷的方向平行的固定钳面；固定片，其固定端固定在所述连接座上，自由端上铰接有转动轮；转动轮，其轮面上设置有突出轮面的活动钳，活动钳在转动轮旋转至预设角度时与固定钳面形成夹持试样的钳口；硬质塑料进行拉伸试验时试样不在钳口内滑动，而且操作简便，降低了高温试验时，操作人员夹持、取下试样的过程中高温烫伤的风险。
The present application belongs to the field of plastic mechanical property testing, and particularly relates to a high-temperature tensile clamp for hard plastics, comprising a connecting seat, a fixed end of which is fixed on a tensile testing machine, and a free end of which is provided with a fixed jaw surface parallel to the direction of the tensile load on the sample; a fixed plate, a fixed end of which is fixed on the connecting seat, and a rotating wheel is hinged on the free end; a rotating wheel, a wheel surface of which is provided with a movable jaw protruding from the wheel surface, and the movable jaw forms a jaw for clamping the sample with the fixed jaw surface when the rotating wheel is rotated to a preset angle; when the hard plastic is subjected to a tensile test, the sample does not slide in the jaws, and the operation is simple, thereby reducing the risk of high-temperature burns to operators in the process of clamping and removing the sample during high-temperature testing.
Description
Technical Field
The application belongs to the field of plastic mechanical property detection, and particularly relates to a high-temperature stretching clamp for hard plastic.
Background
The tensile test is a common mechanical test and is also an important index for measuring the mechanical properties of materials. The test is to apply a tensile load to a sample in the longitudinal axis direction at a prescribed test temperature, humidity and test speed, to measure the mechanical properties of the loaded plastic when the sample breaks, and to divide the load by the cross-sectional area of the sample to obtain the tensile strength.
The plastic tensile test specimen is a dumbbell-shaped thin plate, and the tensile test clamp has various forms and comprises a butt clamp, a wedge clamp and a pin hole clamp. When the opposite clamp and the wedge clamp are used for carrying out a tensile test, the two ends of the upper and lower chucks of the sample are difficult to ensure to be on the same axis when the sample is clamped; the test staff manually operates the clamp to clamp the test sample, so that sufficient clamping force is difficult to ensure, and the test sample is easy to slide in the jaw to fail the test; when the pin hole clamp is adopted, the stress at the pin hole part is concentrated, so that the sample chuck part is seriously deformed, and the accuracy of a tensile test curve is affected. The above-mentioned disadvantages of the stretching jig are more pronounced in high temperature tests.
Disclosure of utility model
The application aims at carrying out a tensile test on hard plastic, solving the problems that the clamping of a sample is unstable and reliable, the sample is broken in a clamp jaw, and the operations of clamping and taking down the sample are complicated and operators are easy to scald during the high-temperature tensile test, and providing a special clamp with simple structure and simple and convenient clamping and fastening of the sample, wherein the clamp comprises:
The fixed end of the connecting seat is fixed on the tensile testing machine, and the free end of the connecting seat is provided with a fixed clamp surface parallel to the direction of the tensile load applied by the sample;
The fixed end of the fixed sheet is fixed on the connecting seat, and the free end of the fixed sheet is hinged with a rotating wheel;
The movable pliers protruding out of the wheel surface are arranged on the wheel surface of the rotating wheel, and when the rotating wheel rotates to a preset angle, the movable pliers form a jaw for clamping a sample with the fixed pliers.
Preferably, the contact surface of the movable clamp and the sample comprises an arc surface.
Preferably, the movable jaw has serrations on the specimen contact surface.
Preferably, the rotatable wheel has a handle thereon.
Preferably, the movable jaw moves in a direction opposite to the tensile load applied to the specimen and gradually approaches the fixed jaw face.
Preferably, the fixed end of the connecting seat is provided with a connecting shaft, the connecting shaft is provided with a pin hole, the tensile testing machine is provided with a sleeve for inserting the connecting shaft, the sleeve is provided with a through hole matched with the pin hole, and the pin shaft passes through the through hole and the pin hole to fix the connecting shaft in the sleeve.
Preferably, the root of the connecting shaft has a threaded section with a nut thereon which is screwed into contact with the end face of the sleeve.
Preferably, the connecting seat is provided with a mounting groove for accommodating the fixing piece, and the fixing piece is arranged in the mounting groove and fixedly connected through a threaded fastener.
Preferably, the fixing jaw face has anti-slip knurling.
The advantages of the application include: the test sample does not slide in the jaw when the hard plastic is subjected to tensile test, and the operation is simple and convenient, so that the risk of high-temperature scalding in the process of clamping and taking down the test sample by an operator is reduced when the test sample is subjected to high-temperature test.
Drawings
FIG. 1 is an assembly view of a plastic high temperature stretching jig according to a preferred embodiment of the present application.
Detailed Description
In order to make the technical solution of the present application and its advantages more clear, the technical solution of the present application will be further and completely described in detail with reference to the accompanying drawings, it being understood that the specific embodiments described herein are only some of the embodiments of the present application, which are for explanation of the present application and not for limitation of the present application. It should be noted that, for convenience of description, only the part related to the present application is shown in the drawings, and other related parts may refer to the general design, and the embodiments of the present application and the technical features of the embodiments may be combined with each other to obtain new embodiments without conflict.
Furthermore, unless defined otherwise, technical or scientific terms used in the description of the application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the application pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," "outer," and the like as used in the description of the present application are merely used for indicating relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and that the relative positional relationships may be changed when the absolute position of the object to be described is changed, thus not being construed as limiting the application. The terms "first," "second," "third," and the like, as used in the description of the present application, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance to the various components. The use of the terms "a," "an," or "the" and similar referents in the description of the application are not to be construed as limiting the amount absolutely, but rather as existence of at least one. As used in this description of the application, the terms "comprises," "comprising," or the like are intended to cover an element or article that appears before the term as such, but does not exclude other elements or articles from the list of elements or articles that appear after the term.
Furthermore, unless specifically stated and limited otherwise, the terms "mounted," "connected," and the like in the description of the present application are used in a broad sense, and for example, the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements, and the specific meaning of the two elements can be understood by a person skilled in the art according to specific situations.
As shown in fig. 1, in order to solve the above problems, the present application provides a hard plastic high temperature stretching clamp, two clamps are respectively installed on a tensile testing machine, one is connected with a loading device of the tensile testing machine, the other end is connected and fixed with a base of the tensile testing machine, the clamp comprises:
a connecting seat 7, the fixed end of which is fixed on the tensile testing machine, and the free end of which is provided with a fixed clamp surface 8 parallel to the direction of the tensile load applied by the sample 9;
a fixed sheet 4, the fixed end of which is fixed on the connecting seat 7, and the free end of which is hinged with a rotating wheel 3;
The rotating wheel 3 is provided with a movable clamp 3 protruding out of the wheel surface, the movable clamp 3 forms a jaw for clamping the sample 9 with the fixed clamp surface 8 when the rotating wheel 3 rotates to a preset angle, the rotating wheel 3 rotates, the movable clamp 3 gradually approaches the fixed clamp surface 8 along with the rotating wheel 3, the gap between the movable clamp 3 and the fixed clamp surface 8 gradually decreases, and when the sample 9 is positioned in the gap between the movable clamp 3 and the fixed clamp surface 8, the movable clamp 3 rotates to a certain angle, and the movable clamp 3 and the fixed clamp surface 8 clamp the sample 9.
Preferably, the contact surface of the movable clamp 3 and the sample 9 comprises an arc surface, the arc surface enables the pretightening force of the movable clamp 3 and the sample 9 to be gradually compressed along with the rotation of the movable clamp 3, and conical teeth are distributed on the arc surface to prevent the sample 9 from sliding.
Preferably, the movable clamp 3 further comprises a plurality of triangular pyramids axially distributed on the rotating wheel 3, or a boss with saw teeth on the contact surface of the watch and the sample 9.
Preferably, the rotating wheel 3 is provided with a handle 2.
Preferably, the movable clamp 3 moves gradually to approach the fixed clamp surface 8 along the direction opposite to the tensile load applied by the sample 9, and the movable clamp 3 has self-locking capability when the sample 9 is loaded.
Preferably, the fixed end of the connecting seat 7 is provided with a connecting shaft, the connecting shaft is provided with a pin hole, the tensile testing machine is provided with a sleeve for inserting the connecting shaft, the sleeve is provided with a through hole matched with the pin hole, and the pin shaft passes through the through hole and the pin hole to fix the connecting shaft in the sleeve.
Preferably, the root of the connecting shaft has a threaded section with a nut 1 thereon, and the nut 1 is screwed into contact with the end face of the sleeve.
Preferably, the connecting seat 7 is provided with a mounting groove for accommodating the fixing piece 4, and the fixing piece 4 is placed in the mounting groove and fixedly connected through the threaded fastener 5.
The advantages of the application include: the test sample does not slide in the jaw when the hard plastic is subjected to tensile test, and the operation is simple and convenient, so that the risk of high-temperature scalding in the process of clamping and taking down the test sample by an operator is reduced when the test sample is subjected to high-temperature test.
The specific steps of the hard plastic tensile test are carried out by using the clamp: 1, respectively connecting and fixing two clamps with a loading end and a base of a tensile testing machine; 2, inserting a clamping part of the sample between a movable jaw and a fixed jaw surface of one of the clamps, pulling a handle, and clamping the sample; 3, moving the loading end of the testing machine to adjust to enable the clamping part at the other end of the sample to be inserted into the clamp, pulling the handle to clamp the sample; and 4, heating the temperature box to the test temperature, preserving heat, and starting the testing machine to start the tensile test after the specified constant temperature time is reached.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323519753.7U CN221993172U (en) | 2023-12-22 | 2023-12-22 | A high temperature tensile fixture for hard plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323519753.7U CN221993172U (en) | 2023-12-22 | 2023-12-22 | A high temperature tensile fixture for hard plastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221993172U true CN221993172U (en) | 2024-11-12 |
Family
ID=93368533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323519753.7U Active CN221993172U (en) | 2023-12-22 | 2023-12-22 | A high temperature tensile fixture for hard plastics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221993172U (en) |
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2023
- 2023-12-22 CN CN202323519753.7U patent/CN221993172U/en active Active
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