CN214584518U - Bidirectional tensile testing machine for thin film material - Google Patents
Bidirectional tensile testing machine for thin film material Download PDFInfo
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- CN214584518U CN214584518U CN202120455296.1U CN202120455296U CN214584518U CN 214584518 U CN214584518 U CN 214584518U CN 202120455296 U CN202120455296 U CN 202120455296U CN 214584518 U CN214584518 U CN 214584518U
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Abstract
The utility model discloses a biaxial tension tester for thin film materials, which comprises a square casing, a biaxial tension test device and a heating device, wherein the biaxial tension test device and the heating device are positioned in the casing; the base is arranged at the center of the bottom surface in the shell; the four stretching units are symmetrically arranged around the periphery of the base in a left-right mode and a front-back mode, the first stretching unit and the second stretching unit are located on the left side and the right side of the base, and the third stretching unit and the fourth stretching unit are located on the front side and the back side of the base; the film material is stretched left and right by pushing and pulling the clamp to move under the driving of the motor I; and the film material is stretched forwards and backwards by pushing and pulling the clamp to move under the driving of the motor II. The tensile testing machine can realize the characteristics of biaxial tension and uniaxial tension of film materials with different proportions and different stretching speeds.
Description
Technical Field
The utility model belongs to the technical field of film tensile test instrument technique and specifically relates to a biaxial tension test machine for film material.
Background
The stretching of the polymer film is a process combining multiple processing steps and multiple processing parameters. Due to the long-chain characteristic of the polymer, the molecular chain orientation induced by external force is one of the effective methods for improving the mechanical property of the polymer film. The current polymer film stretch forming process can be divided into a dry process and a wet process according to the difference of preparation methods. The dry process is simple to operate, is suitable for industrial production, is widely applied to the production of polymer films, and can be divided into a unidirectional stretching process and a bidirectional stretching process.
The biaxial stretching process is stretching the sheet in both the longitudinal and transverse directions below the melting point. The stretching in both directions may be performed simultaneously (simultaneous stretching) or sequentially (sequential stretching).
The biaxial tension tester is provided with a tension sensor, and can detect the mechanical properties of the sample such as stress, strain and the like in real time when the film is stretched. However, the equipment value is high, and the equipment is mainly equipped in some large petrochemical companies in China. Because the research and development of the biaxial tension experimental device has the advantages of not small technical difficulty, high research and development cost and small market scale, only a few enterprises carry out related research and design, and the problems in the aspects of control precision, tension uniformity and the like exist, so that the biaxial tension experimental device cannot provide substantial help for the research of the film tension process at present.
Disclosure of Invention
The utility model aims at providing a biaxial tension test machine for film material.
The utility model provides a biaxial tension test machine, including square casing, biaxial tension test device, heating device and control system. A biaxial tension test device and a heating device are arranged in the square casing. The biaxial tension test device comprises a base made of carbon steel, four tension units, two motors and two lead screws. The base is arranged at the center of the inner bottom surface of the machine shell. The four stretching units are symmetrically arranged around the periphery of the base in a left-right mode and a front-back mode, the first stretching unit and the second stretching unit are located on the left side and the right side of the base, and the third stretching unit and the fourth stretching unit are located on the front side and the back side of the base. Each stretching unit comprises a clamp, a first connecting rod, a first reversing arm, a second connecting rod, a second reversing arm and a third connecting rod; the four clamps are oppositely arranged on the base in pairs, the front end of each clamp is used for clamping a tested film material, and the tail ends of the four clamps are sequentially connected with a first connecting rod, a first reversing arm, a second connecting rod, a second reversing arm and a third connecting rod; the first motor is connected with the first lead screw through an elastic coupling, two ends of the first lead screw are respectively connected with the third connecting rod of the first stretching unit and the second stretching unit through lead screw nuts, and the first motor is driven to push and pull the clamp to move so as to stretch the film material left and right; the motor II is connected with the screw II through an elastic coupling, and two ends of the screw II are respectively connected with the third stretching unit and the third connecting rod of the fourth stretching unit through screw nuts; and the film material is stretched forwards and backwards by pushing and pulling the clamp to move under the driving of the motor II.
The heating device comprises a heater I, a heater II and a temperature measuring instrument; the heater I is arranged in a cavity in the base, the heater II is arranged above the base, and the temperature measuring instrument is arranged above the heater II and is a non-contact temperature measuring device adopting a thermocouple to measure temperature. And the horizontal position and the vertical height position of the heater II can be adjusted. The bottom of the machine shell is provided with a supporting cabinet, a lifting cylinder is arranged in the supporting cabinet and used for adjusting and changing the vertical height position of the heater II.
And a force measuring sensor is arranged on the second connecting rod close to the door body. The structure of the testing machine also comprises a control system. The first motor, the second motor, the force measuring sensor, the two heaters and the temperature measuring instrument are all electrically connected to the control system.
Preferably, the clamp holding portion is provided with anti-slip threads.
Preferably, the tested film material is a cross-shaped test piece.
Preferably, the front face of the machine shell is provided with a door body, the side faces of the periphery of the machine shell are provided with visible windows, and the windows are sealed by transparent materials.
Compared with the prior art, the utility model discloses an useful part lies in:
(1) the biaxial tension tester has the advantages of simple structure and simple operation, and can realize biaxial tension and uniaxial tension of film materials with different proportions and different stretching speeds.
(2) The biaxial tension tester can ensure that the test piece material can be uniformly stretched in four horizontal directions or two opposite directions.
(3) The biaxial tension tester enables the deformation area of the material to be in different temperature ranges, and increases the research range of the mechanical property of the material.
(4) The biaxial tension tester has the advantages of wide use configuration and element sources, low manufacturing cost, high economic benefit, convenient processing and manufacturing and easy realization of industrial production.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a top view of the biaxial tension tester of the present invention.
Fig. 2 is a front view of the biaxial tension tester.
Figure 3 is a schematic diagram of a cross-shaped test piece.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1-3, the utility model provides a biaxial tension tester for film material, including square casing 1, biaxial tension test device, heating device and control system. The front surface of the machine shell is provided with a door body 2, the side surfaces of the periphery of the machine shell are provided with visual windows 3, and the windows are sealed by transparent materials. A biaxial tension test device and a heating device are arranged in the machine shell. The biaxial tension test device comprises a base 4 made of carbon steel, four tension units, two motors (a motor I5 and a motor II 6) and two lead screws (a lead screw I7 and a lead screw II 8). The base is arranged at the center of the inner bottom surface of the machine shell. The four stretching units are symmetrically arranged around the periphery of the base in a left-right mode and a front-back mode, the first stretching unit and the second stretching unit are located on the left side and the right side of the base, and the third stretching unit and the fourth stretching unit are located on the front side and the back side of the base. The tested film material is a cross-shaped test piece. Each stretching unit comprises a clamp 9, a first connecting rod 10, a first reversing arm 11, a second connecting rod 12, a second reversing arm 13 and a third connecting rod 14. The four clamps are oppositely arranged on the base in pairs, the front end of each clamp is used for clamping a tested film material, and the tail end of each clamp is sequentially connected with the first connecting rod 10, the first reversing arm 11, the second connecting rod 12, the second reversing arm 13 and the third connecting rod 14. The clamping part of the clamp is provided with anti-skidding lines to prevent skidding. The first reversing arm and the second reversing arm are fixed with the bottom surface of the machine shell through a connecting plate 23. The first motor 5 is connected with the first lead screw 7 through an elastic coupling 15, and two ends of the first lead screw are respectively connected with the third connecting rod of the first stretching unit and the second stretching unit through lead screw nuts 16. A guide rail 25 is provided parallel to the screw. The film material is stretched left and right by pushing and pulling the clamp to move under the driving of the motor I. The second motor 6 is connected with the second lead screw 8 through an elastic coupling 15, and two ends of the second lead screw are respectively connected with the third connecting rod of the third stretching unit and the third connecting rod of the fourth stretching unit through lead screw nuts 16. A guide rail 25 is arranged parallel to the screw rod. And the film material is stretched forwards and backwards by pushing and pulling the clamp to move under the driving of the motor II. And a second connecting rod close to the machine shell door body 2 is provided with a load cell 22.
The heating device comprises a heater I17, a heater II 18 and a temperature measuring instrument 19. And the heating power of the heater I and the heater II is 2-5 KW. The heater I is arranged in a cavity in the base, the heater II is arranged above the base, and the temperature measuring instrument is arranged above the heater II and is a non-contact temperature measuring device adopting a thermocouple to measure temperature. And the horizontal position and the vertical height position of the heater II can be adjusted. The heater II is arranged on the horizontal guide rail 24 and can slide on the horizontal guide rail to adjust the horizontal position of the heater II. Moreover, the central position of the horizontal guide rail is fixedly connected with the upper part of the telescopic upright rod 26, the bottom of the machine shell is provided with a supporting cabinet 20, and the front side of the supporting cabinet is provided with a door body. The support cabinet is internally provided with a lifting cylinder 21, a telescopic shaft of the lifting cylinder is a telescopic vertical rod 26, and the heater II and the horizontal guide rail 24 can move up and down along with the telescopic vertical rod 26 as a whole under the control of the lifting cylinder so as to adjust and change the height position of the heater II. Compressed air is used as a power source to drive the lifting cylinder.
The construction of the tester also includes a control system (not shown). The first motor, the second motor, the force measuring sensor, the two heaters and the temperature measuring instrument are all electrically connected to the control system.
The method for performing the biaxial tension test by using the tensile testing machine comprises the following steps:
firstly, four clamps respectively clamp four ends of a cross-shaped test piece, and the stretching proportion and the stretching speed are set;
secondly, heating to enable the temperature of the deformation area of the cross-shaped test piece to reach and be kept at the set temperature for 1-2 minutes;
thirdly, closing heating, performing biaxial tension, and measuring performance parameters of the cross-shaped test piece in the tension process by using a force transducer; the system carries out statistics and recording on the parameters to generate a biaxial tension mechanical property result at the temperature.
The method for performing the unidirectional tensile test by using the tensile testing machine comprises the following steps:
firstly, two clamps in opposite directions respectively clamp two ends of a cross-shaped test piece, and the stretching proportion and the stretching speed are set;
secondly, heating to enable the temperature of the deformation area of the cross-shaped test piece to reach and be kept at the set temperature for 1-2 minutes;
thirdly, closing heating, performing unidirectional stretching, and measuring performance parameters of the cross-shaped test piece in the stretching process through a force transducer; the system carries out statistics and recording on the parameters to generate a result of the uniaxial tension mechanical property at the temperature.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (9)
1. A biaxial tension tester for thin film materials is characterized by comprising a square casing, a biaxial tension test device and a heating device, wherein the biaxial tension test device and the heating device are positioned in the casing; the base is arranged at the center of the bottom surface in the shell; the four stretching units are symmetrically arranged around the periphery of the base in a left-right mode and a front-back mode, the first stretching unit and the second stretching unit are located on the left side and the right side of the base, and the third stretching unit and the fourth stretching unit are located on the front side and the back side of the base; each stretching unit comprises a clamp, a first connecting rod, a first reversing arm, a second connecting rod, a second reversing arm and a third connecting rod; the four clamps are oppositely arranged on the base in pairs, the front end of each clamp is used for clamping a tested film material, and the tail ends of the four clamps are sequentially connected with a first connecting rod, a first reversing arm, a second connecting rod, a second reversing arm and a third connecting rod; the first motor is connected with the first lead screw through an elastic coupling, two ends of the first lead screw are respectively connected with the third connecting rod of the first stretching unit and the second stretching unit through lead screw nuts, and the first motor is driven to push and pull the clamp to move so as to stretch the film material left and right; the motor II is connected with the screw II through an elastic coupling, and two ends of the screw II are respectively connected with the third stretching unit and the third connecting rod of the fourth stretching unit through screw nuts; and the film material is stretched forwards and backwards by pushing and pulling the clamp to move under the driving of the motor II.
2. The biaxial tension tester for thin film materials as set forth in claim 1, wherein said heating means comprises a heater i, a heater ii and a thermometer; the heater I is arranged in a cavity in the base, the heater II is arranged above the base, and the temperature measuring instrument is arranged above the heater II and is a non-contact temperature measuring device adopting a thermocouple to measure temperature.
3. The biaxial stretching testing machine for film materials as set forth in claim 2, wherein the horizontal position and the vertical height position of said heater ii are adjustable.
4. The machine for testing the biaxial tension of the thin film material according to claim 3, wherein the second link rod near the door body is provided with a load cell.
5. The machine according to claim 4, further comprising a control system, wherein the first motor, the second motor, the load cell, the two heaters, and the temperature detector are electrically connected to the control system.
6. The biaxial tension tester for thin film materials as set forth in claim 1, wherein the holding portion of the jig is provided with an anti-slip pattern.
7. The biaxial tension tester for film materials as recited in claim 1, wherein the film material to be tested is a cross-shaped test piece.
8. The machine according to claim 1, wherein the door is disposed on the front surface of the machine casing, the visual windows are disposed on the peripheral side surfaces of the machine casing, and the windows are sealed by transparent materials.
9. The machine according to claim 1, wherein a supporting cabinet is arranged at the bottom of the machine shell, and a lifting cylinder is arranged in the supporting cabinet and used for adjusting and changing the vertical height position of the heater II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120455296.1U CN214584518U (en) | 2021-03-03 | 2021-03-03 | Bidirectional tensile testing machine for thin film material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120455296.1U CN214584518U (en) | 2021-03-03 | 2021-03-03 | Bidirectional tensile testing machine for thin film material |
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| CN214584518U true CN214584518U (en) | 2021-11-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544332A (en) * | 2022-03-03 | 2022-05-27 | 重庆科技学院 | Dynamic mechanical analysis system for simultaneously loading thermal power and electricity |
| CN115127909A (en) * | 2022-07-27 | 2022-09-30 | 西南石油大学 | Special fixture for high-temperature high-pressure oil well pipe erosion corrosion test |
| CN118464635A (en) * | 2024-07-12 | 2024-08-09 | 中太(苏州)氢能源科技有限公司 | Biaxial stretching fatigue test method for storage tank film |
-
2021
- 2021-03-03 CN CN202120455296.1U patent/CN214584518U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544332A (en) * | 2022-03-03 | 2022-05-27 | 重庆科技学院 | Dynamic mechanical analysis system for simultaneously loading thermal power and electricity |
| CN114544332B (en) * | 2022-03-03 | 2024-01-16 | 重庆科技学院 | Dynamic mechanical analysis system for simultaneous loading of thermoelectric power |
| CN115127909A (en) * | 2022-07-27 | 2022-09-30 | 西南石油大学 | Special fixture for high-temperature high-pressure oil well pipe erosion corrosion test |
| CN118464635A (en) * | 2024-07-12 | 2024-08-09 | 中太(苏州)氢能源科技有限公司 | Biaxial stretching fatigue test method for storage tank film |
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