CN114002064A - Multi-medium-based biaxial stretching instrument capable of adopting and disassembling clamp - Google Patents
Multi-medium-based biaxial stretching instrument capable of adopting and disassembling clamp Download PDFInfo
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- CN114002064A CN114002064A CN202111289153.9A CN202111289153A CN114002064A CN 114002064 A CN114002064 A CN 114002064A CN 202111289153 A CN202111289153 A CN 202111289153A CN 114002064 A CN114002064 A CN 114002064A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- General Health & Medical Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the field of material structure research and material mechanical property test, and particularly relates to a biaxial stretching instrument based on a multi-medium removable clamp, which comprises: the device comprises a power assembly, a cavity, a guide rail, a clamp loading platform, a ball screw and a displacement sensor; the power assembly is arranged outside the cavity; the guide rail is arranged in the cavity; the clamp loading platform is arranged on the guide rail; the ball screw penetrates through the clamp loading platform and the cavity wall to be connected with the power assembly; the displacement sensor penetrates through the wall of the cavity to correspond to the clamp loading platform and is used for detecting the moving distance of the clamp loading platform; the invention provides a stable and large space for the tensile test of the middle test piece in the medium in the cavity, can add various media in the space to simulate the state of the test piece in a real service state as much as possible, and simultaneously, is matched with an environmental scanning electron microscope to carry out real-time dynamic monitoring on the test piece, analyzes and calculates the cracks on the surface of the test piece, and obtains more reliable and accurate data.
Description
Technical Field
The invention belongs to the field of material structure research and material mechanical property test, and particularly relates to a biaxial stretching instrument capable of adopting a detachable clamp based on multiple media.
Background
The research on the microstructure deformation, damage and damage mechanism of the material under the action of load has important practical significance on the development of material science. The mechanical property of the material is influenced by various factors, wherein the temperature and the medium are one of important factors influencing the mechanical property of the material, particularly for the high-tech fields of aerospace, robots, navigation, submarines and the like, people frequently explore extreme environments such as outer space, deep sea, polar regions and the like in order to deal with environmental deterioration and resource exhaustion, and obviously, the judgment of the conventional mechanical property test on the property of the material has no scientificity and practicability for guiding the design and the use of the material under the complex environment. However, at present, the domestic material stretching device mainly works in the atmospheric environment, and cannot effectively analyze materials in extreme environments (high temperature, low temperature, acidity and alkalinity), so that the limitation of material analysis is caused. Therefore, how to provide a material mechanical property testing device, which can dynamically monitor the micro deformation damage of the test piece material under various different media and environments in the whole process is a technical problem that needs to be solved by technical personnel in the field.
The clamp is a core component of the stretching device, and has non-negligible influence on the reliability and stability of the mechanical property test of the material, and currently, most of clamps of the stretching device adopt a fixing mode of half-welding on a workbench, so that the clamp has certain inconvenience on the installation and the disassembly of a test piece, is not beneficial to clamping the test piece with a specific shape, and has great influence on the practicability of the device.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a biaxial stretching instrument based on a multi-medium detachable clamp, which comprises: the device comprises a power assembly 1, a cavity 4, a guide rail 5, a clamp loading platform 6, a ball screw 9 and a displacement sensor 11; the power assembly 1 is arranged outside the cavity 4; the guide rail 5 is arranged inside the cavity 4; the clamp loading table 6 is arranged on the guide rail 4; the ball screw 9 penetrates through the clamp loading platform 6 and the cavity wall to be connected with the power assembly 1; the displacement sensor 11 penetrates through the cavity wall to correspond to the clamp loading platform 6 and is used for detecting the moving distance of the clamp loading platform 6.
Preferably, the power assembly 1 comprises a stepping motor 101, a reducer 102 and a coupling 103; a rotating shaft of the stepping motor 101 is connected with the reducer 102; the speed reducer 102 is connected to one end of the ball screw 9 via a coupling 103.
Preferably, the cavity 4 is a cuboid cavity with an opening at the upper end, and the interior of the cavity is coated with anticorrosive paint.
Preferably, the jig loading table 6 includes a moving jig loading table 601, a fixed jig loading table 602, and a jig 603; the moving jig loading table 601 and the stationary jig loading table 602) are each provided with a wedge-shaped slot hole for loading the jig 603.
Further, the clamp 603 consists of an upper pressing sheet 6032 and a lower pressing sheet 6031, the upper pressing sheet and the lower pressing sheet have the same thickness and the same shape, are both wedge-shaped and are precisely fit with the wedge-shaped slot of the clamp loading table; the upper pressing sheet 6032 is connected with a cylindrical handle which is convenient to take out, the upper pressing sheet 6032 is connected with the lower pressing sheet 6031 through three bolts, and cuboids or cylindrical slotted holes are formed in the inner side of the upper pressing sheet and the lower pressing sheet and used for clamping samples in different shapes.
Further, the center lines of the wedge-shaped slot on the moving jig loading table 601 and the wedge-shaped slot on the stationary jig loading table 602 are aligned with each other in the horizontal plane.
Furthermore, two through screw holes are distributed on the upper half parts of the movable clamp loading table 601 and the fixed clamp loading table 602, and the through screw holes of the movable clamp loading table 601 correspond to the through screw holes of the fixed clamp loading table 602; through holes are provided in the movable jig mounting table 601 and the fixed jig mounting table 602, respectively.
Further, the thread direction in the through-screw holes in the moving jig loading table 601 and the stationary jig loading table 602 is the same.
Preferably, the ball screw 9 is a single-headed ball screw, and the screw thread is engaged with a through-screw hole in the movable jig loading table.
Preferably, the biaxial stretching machine further comprises a pressure sensor 10, one end of the pressure sensor 10 is fixed on the clamp loading platform 6, and the other end is fixed on the inner wall of the cavity 4, and is used for measuring the pressure of the clamp loading platform 6 in the stretching process.
The invention has the beneficial effects that:
the device is driven by a double-shaft motor, so that a stable and large space is provided for a tensile experiment of a middle test piece in a medium in a cavity, meanwhile, due to the existence of the cavity, various media such as an acidic medium, an alkaline medium and liquid nitrogen can be added to simulate the state of the test piece in a real service state as much as possible, and simultaneously, the device is matched with an environmental scanning electron microscope to carry out real-time dynamic monitoring on the test piece, so that cracks on the surface of the test piece are analyzed and calculated, and more reliable and accurate data are obtained; the invention adopts the design of the detachable clamp, can design a plurality of sets of different clamps for clamping test pieces with different shapes, and improves the service life and the application universality of the stretching instrument.
Drawings
FIG. 1 is a schematic structural diagram of a removable clamp biaxial stretcher based on multimedia of the invention;
FIG. 2 is a right side view of the removable multi-media based clamp biaxial stretcher of the present invention;
FIG. 3 is a top view of the removable multi-media based clamp biaxial stretcher of the present invention;
FIG. 4 is an overall assembly view of the removable fixture biaxial stretcher based on multiple media of the present invention;
FIG. 5 is a diagram of the removable clamp biaxial stretcher clamp based on multimedia of the present invention;
FIG. 6 is a block diagram of another embodiment of the removable multi-media based clamp biaxial stretcher clamp of the present invention;
the device comprises a power assembly 1, a power assembly 101, a stepping motor 102, a speed reducer 103 and a coupling; 4. a cavity; 5. a guide rail; 6. a clamp loading table 601, a movable clamp loading table 602, a fixed clamp loading table 603, a clamp 6031, a lower pressing sheet 6032 and an upper pressing sheet; 9. a ball screw; 10. a pressure sensor; 11. And a displacement sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A multi-media based removable clamp biaxial stretcher, as shown in fig. 1 and 4, the device comprising: the device comprises a power assembly 1, a cavity 4, a guide rail 5, a clamp loading platform 6, a ball screw 9 and a displacement sensor 11; the power assembly 1 is arranged outside the cavity 4; the guide rail 5 is arranged inside the cavity 4; the clamp loading table 6 is arranged on the guide rail 4; the ball screw 9 penetrates through the clamp loading platform 6 and the cavity wall to be connected with the power assembly 1; the displacement sensor 11 penetrates through the cavity wall to correspond to the clamp loading platform 6 and is used for detecting the moving distance of the clamp loading platform 6.
Preferably, the biaxial stretching device designed by the invention is of a structure combining a plane type and a vertical type.
Preferably, the biaxial stretching device designed by the invention has a front-back symmetrical spatial structure.
A specific embodiment of a power assembly, the power assembly comprises a stepping motor 101, a reducer 102 and a coupling 103; a rotating shaft of the stepping motor 101 is connected with the reducer 102; the speed reducer 102 is connected to one end of the ball screw 9 via a coupling 103. The stepping motor 101 is used for powering the clamp loading table 6; the speed reducer 102 is used for controlling the rotating speed of the stepping motor 101, so that an operator can control the tension of the biaxial stretching instrument more easily; the coupling 103 is used to transmit the power in the speed reducer 102 to the ball screw 9.
Preferably, two power assemblies 1 are arranged in the biaxial stretching machine, and each device in the two power assemblies 1 is the same, so that the driving force of the power assemblies is ensured to be the same.
Preferably, the stepping motor 101 is a 12V forward and reverse rotation miniature speed-adjustable direct current speed reduction motor, and the two drivers are controlled by the single chip microcomputer to drive the motors to run simultaneously.
An operating mode of a stepping motor, comprising: the displacement sensor of the device is a spring type self-resetting displacement sensor. The displacement sensor is placed in the middle of the two progressive motors and on the central axis of the whole device, is linked with the moving end loading table through a hole in the left end of the device, and measures the stretching amount or the compression amount of the test piece extruded after stretching.
The cavity 4 is a cuboid cavity with an opening at the upper end, and the interior of the cavity is coated with an anti-corrosion paint. The anticorrosion paint is arranged on the inner side of the cavity, so that various media such as an acidic medium, an alkaline medium and liquid nitrogen can be added into the cavity to simulate the state of the test piece in a real service state as much as possible, and meanwhile, the test piece is dynamically monitored in real time by matching with an environmental scanning electron microscope to analyze and calculate cracks on the surface of the test piece, so that more reliable and accurate data can be obtained.
The specific embodiment of the guide rail is a HIWIN alloy micro linear guide rail MGN 12; a guide rail 5 is provided on the bottom surface inside the cavity, and a jig loading table 6 is provided on the guide rail 5 so that the jig loading table 6 can slide on the guide rail 5.
Preferably, the biaxial stretching machine designed by the invention is provided with two guide rails which are uniformly arranged inside the cavity 4, so that the clamp loading platform 6 arranged on the guide rails can slide more easily, and the clamp loading platform 6 is prevented from being formed into the guide rails.
In one embodiment of the clamp loading station, the clamp loading station 6 includes a movable clamp loading station 601, a fixed clamp loading station 602, and a clamp 603; the moving jig loading table 601 and the stationary jig loading table 602) are each provided with a wedge-shaped slot hole for loading the jig 603.
Preferably, the center lines of the wedge-shaped slot on the moving clamp loading table 601 and the wedge-shaped slot on the fixed clamp loading table 602 are aligned with each other in a horizontal plane; when the material is subjected to a tension test, the stress on the material is more uniform, and the test result is more accurate.
Preferably, two through screw holes are distributed on the upper half parts of the movable clamp loading table 601 and the fixed clamp loading table 602, and the through screw holes of the movable clamp loading table 601 correspond to the through screw holes of the fixed clamp loading table 602; through holes are provided in the movable jig mounting table 601 and the fixed jig mounting table 602, respectively. The ball screw 9 is a single-head ball screw, and the screw thread is meshed with a through screw hole in the movable clamp loading platform. The inner through holes of the movable clamp loading table 601 and the fixed clamp loading table 602 are used for fixing the clamp 603, so that the clamp 603 is prevented from shaking.
Preferably, the thread direction in the through-screw holes in the moving jig loading table 601 and the stationary jig loading table 602 is the same.
A specific embodiment of the clamp is shown in figure 5, and the clamp consists of an upper pressing sheet 6032 and a lower pressing sheet 6031, wherein the upper pressing sheet and the lower pressing sheet have the same thickness and the same shape, are both wedge-shaped and are precisely matched with a wedge-shaped slot hole of a clamp loading platform; the upper pressing sheet 6032 is connected with a cylindrical handle which is convenient to take out, the upper pressing sheet 6032 is connected with the lower pressing sheet 6031 through bolts, and cuboids or cylindrical slotted holes are formed in the inner side of the upper pressing sheet and the lower pressing sheet and used for clamping samples in different shapes.
Preferably, bolt holes are formed at corresponding positions of the upper pressure plate 6032 and the lower pressure plate 6031, and bolts are inserted through the bolt holes to fix the upper pressure plate and the lower pressure plate.
Preferably, 3 bolt holes are formed, so that the upper pressing plate and the lower pressing plate are fixed more stably.
As shown in fig. 6, the upper pressing plate and the lower pressing plate are provided with semi-cylindrical grooves at corresponding positions, and the two semi-cylindrical grooves correspond to each other to form a cylindrical groove.
In one embodiment of the ball screw, the ball screw 9 is a single-ended ball screw, and the screw thread is engaged with a through-going screw hole in the movable clamp loading table.
Preferably, the biaxial stretching machine designed by the invention is provided with two ball screws so as to control the clamp loading table to move back and forth.
A displacement sensor is a spring type self-resetting displacement sensor, as shown in figure 2, a displacement sensor 11 penetrates through the wall of a cavity to correspond to a clamp loading table 6; that is, the sensing end of the displacement sensor 11 passes through the cavity wall and then is attached to the clamp loading table 6, and when the clamp loading table 6 moves, the sensing end of the displacement sensor is separated from the clamp loading table 6, so that the sensing end measures the moving distance of the clamp loading table 6.
A displacement sensor based displacement test comprising: the displacement sensor of the device is a spring type self-resetting displacement sensor. The displacement sensor is placed in the middle of the two progressive motors and on the central axis of the whole device, is linked with the moving end loading table through a hole in the left end of the device, and measures the stretching amount or the compression amount of the test piece extruded after stretching.
A pressure sensor is a threaded tension-compression sensor, one end of a pressure sensor 10 is fixed on a clamp loading table 6, and the other end of the pressure sensor is fixed on the inner wall of a cavity 4 and used for measuring the pressure of the clamp loading table 6 in the stretching process.
A force measurement based on a pressure sensor comprises a sensor of the device, namely a thread type tension and compression sensor. The left end of the tension and compression sensor is connected with the right end of the fixed end clamp loading platform, the other end of the tension and compression sensor is connected and fixed with the right end wall of the device, and the whole part of the tension and compression sensor is fixed on the central axis of the device. The lower end of the fixed end loading platform is connected with a sliding rail at the bottom of the device through a sliding groove, the fixed end loading platform is fixedly connected with one side of the sensor, and only small and negligible displacement occurs when stretching or extruding movement is carried out. The fixed positions of the tension and compression sensor and the loading platform are on the central axis of the whole device, so that the force measured by the tension and compression sensor is the force borne by the test piece.
The cavity of the whole device is a closed space, so that the experiment can be carried out under ordinary conditions, and liquid media such as purified water, tap water and the like can be injected into the cavity. Because the cavity is coated with the anticorrosive paint, the device can also measure the tensile and compressive deformation of the test piece under corrosive liquid media or low-temperature media such as saline water, hydrochloric acid, alkaline water, liquid nitrogen and the like. In addition, the device is made of a heat-resistant material, so that the amount of tensile and compressive deformation of the test piece at high temperature can also be measured.
The detachable clamp biaxial stretching instrument based on the multimedia can realize the following functions and indexes: 1. carrying out operations such as stretching and compressing on the test piece; 2. the rotating speed and the rotating direction of the motor are controlled in real time, the switching process is stable, and no impact and useless stroke exist; 3. the loading process is stable, and the operation of the stepping motor is synchronous; 4. the loading stress and the displacement can be recorded simultaneously; 5. the measurement precision is high.
In the description of the present invention, it is to be understood that the terms "top", "bottom", "one end", "upper", "one side", "inner", "front", "rear", "center", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a can adopt biaxial stretching appearance of dismantling anchor clamps based on multimedium which characterized in that includes: the device comprises a power assembly (1), a cavity (4), a guide rail (5), a clamp loading platform (6), a ball screw (9) and a displacement sensor (11); the power assembly (1) is arranged outside the cavity (4); the guide rail (5) is arranged inside the cavity (4); the clamp loading table (6) is arranged on the guide rail (4); the ball screw (9) penetrates through the clamp loading platform (6) and the cavity wall to be connected with the power assembly (1); the displacement sensor (11) penetrates through the wall of the cavity to correspond to the clamp loading platform (6) and is used for detecting the moving distance of the clamp loading platform (6).
2. The biaxial stretching machine based on the multimedia removable clamp according to claim 1, characterized in that the power assembly (1) comprises a stepping motor (101), a reducer (102) and a coupler (103); the rotating shaft of the stepping motor (101) is connected with the reducer (102); the speed reducer (102) is connected with one end of the ball screw (9) through a coupling (103).
3. The biaxial stretching machine based on multi-media removable fixture of claim 1, characterized in that the cavity (4) is a rectangular parallelepiped cavity with an open upper end, and the interior of the cavity is coated with an anticorrosive paint.
4. The multi-media based removable clamp biaxial stretching machine according to claim 1, wherein the clamp loading table (6) comprises a moving clamp loading table (601), a fixed clamp loading table (602), and a clamp (603); the middle positions of the inner sides of the movable clamp loading platform (601) and the fixed clamp loading platform (602) are respectively provided with a wedge-shaped slotted hole, and the wedge-shaped slotted holes are used for loading the clamps (603).
5. The biaxial stretching machine based on the removable multi-media clamp of claim 4, wherein the clamp (603) is composed of an upper pressing sheet (6032) and a lower pressing sheet (6031), the upper pressing sheet and the lower pressing sheet have the same thickness and shape, are both wedge-shaped and are precisely matched with the wedge-shaped slot of the clamp loading platform; the upper pressing sheet (6032) is connected with a cylindrical handle to be taken out conveniently, the upper pressing sheet (6032) is connected with the lower pressing sheet (6031) through three bolts, and cuboids or cylindrical slotted holes are formed in the inner sides of the upper pressing sheet and the lower pressing sheet and used for clamping samples in different shapes.
6. The multi-media based removable clamp biaxial stretching machine of claim 4, wherein the median lines of the wedge slots on the moving clamp loading table (601) and the fixed clamp loading table (602) are aligned with each other in a horizontal plane.
7. The biaxial stretching machine based on multi-media removable clamp of claim 4, characterized in that the upper half of the movable clamp loading platform (601) and the fixed clamp loading platform (602) are distributed with two through screw holes, and the through screw holes of the movable clamp loading platform (601) correspond to the through screw holes of the fixed clamp loading platform (602); through holes are respectively formed in the movable clamp loading platform (601) and the fixed clamp loading platform (602).
8. The multi-media based removable clamp biaxial stretcher according to claim 7, wherein the thread direction in the through-screw holes in the moving clamp loading table (601) and the fixed clamp loading table (602) is the same.
9. A multi-media based dual-axis stretching machine with removable jaws, according to claim 1, wherein the ball screw (9) is a single head ball screw, the screw thread engaging through screw holes in the moving jaw loading table.
10. The biaxial stretching machine based on multimedia detachable fixture as claimed in claim 1, characterized in that the biaxial stretching machine further comprises a pressure sensor (10), one end of the pressure sensor (10) is fixed on the fixture loading platform (6), and the other end is fixed on the inner wall of the cavity (4) for measuring the pressure of the fixture loading platform (6) during stretching.
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| CN202111289153.9A CN114002064A (en) | 2021-11-02 | 2021-11-02 | Multi-medium-based biaxial stretching instrument capable of adopting and disassembling clamp |
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| CN202111289153.9A CN114002064A (en) | 2021-11-02 | 2021-11-02 | Multi-medium-based biaxial stretching instrument capable of adopting and disassembling clamp |
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Cited By (1)
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| CN114527068A (en) * | 2022-03-17 | 2022-05-24 | 扬州大学 | Organic glass casting molding bonding strength testing device and using method |
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