CN212342117U

CN212342117U - Experimental device for comprehensive testing young modulus of metal wire

Info

Publication number: CN212342117U
Application number: CN202020986198.6U
Authority: CN
Inventors: 贾丽斯; 于成英; 王浩楠; 赖立强; 唐秋丽
Original assignee: Guangxi University Xingjian College of Science and Liberal Arts
Current assignee: Guangxi University Xingjian College of Science and Liberal Arts
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2021-01-12
Anticipated expiration: 2030-06-02

Abstract

The utility model discloses an experimental device for comprehensively testing Young modulus of a metal wire, which comprises a portal frame, a telescope support and a laser support; the parallel connecting rod of the portal frame is sequentially connected with a top plate, a light lever supporting plate, a sliding chute support and a first base; the top end of the metal wire is connected with the top plate, the middle part of the metal wire is connected with a metal wire clamping table, the bottom end of the metal wire is connected with a first blade support, and the optical lever support plate and the metal wire clamping table are used for supporting the front pin and the rear pin of the optical lever; the inner side of the upper frame of the first blade support is connected with a first blade, and the middle point of the outer side of the lower frame is connected with a weight; one end of the sliding groove support is fixedly connected with the door frame, the other end of the sliding groove support is provided with a sliding groove matched with the frame of the first blade support, the sliding groove support is further fixedly connected with a second blade, and the first blade and the second blade form a slit in the frame structure of the first blade support. The utility model discloses an experimental device of comprehensive testing wire Young modulus has solved big, the teaching inefficiency scheduling problem of current single principle experimental apparatus error.

Description

Experimental device for comprehensive testing young modulus of metal wire

Technical Field

The utility model relates to an experimental apparatus of wire Young's modulus especially relates to an experimental apparatus of comprehensive testing wire Young's modulus.

Background

At present, in a physical experiment for detecting the young modulus of a metal wire, a common device is a detection device adopting an optical lever method, the device amplifies a small rotating angle of an optical lever reflector and reflects the small rotating angle into linear displacement of a scale, two front feet of an optical lever are mainly placed on a fixed platform of the experiment device, a rear foot is placed on a measuring end face of the metal wire to be measured, when the metal wire is stressed to generate small extension, the optical lever rotates around the front foot by a small angle so as to drive the optical lever reflector to rotate by a corresponding small angle, and the scale is reflected between the optical lever reflector and an adjusting reflector, so that the small angular displacement is amplified into larger linear displacement.

In the physical experiment, measurement error is a common problem, repeated detection and experiment of the same experiment principle cannot avoid the error, and the experiment principle capable of measuring the Young modulus has a plurality of kinds, so students can not operate and know in the same device or the same experiment process.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides an experimental apparatus of comprehensive testing wire Young modulus aims at solving the lower problem of measuring error, experiment teaching efficiency in less experimentation.

The utility model discloses take following technical scheme to realize above-mentioned purpose:

an experimental device for comprehensively testing Young modulus of a metal wire comprises a portal frame, a telescope support and a laser support; the gantry comprises parallel connecting rods, and the parallel connecting rods are sequentially connected with a top plate, an optical lever supporting plate, a chute support and a first base from top to bottom; the top end of the metal wire is fixedly connected with the top plate, the middle part of the metal wire is fixedly connected with a metal wire clamping table, and the bottom end of the metal wire is fixedly connected with a first blade support; the first blade support is of a frame structure, the inner side of the upper frame is fixedly connected with a first blade, and the middle point of the outer side of the lower frame is connected with a weight; the optical lever supporting plate is connected with the parallel connecting rods in a sliding manner and locked through a first screw, wherein a through hole for accommodating the metal wire clamping table to slide vertically is formed in the optical lever supporting plate, the optical lever is fixedly connected with two front legs and one rear leg, the front legs are fixedly connected with a reflector, the front legs are placed on the optical lever supporting plate, and the rear legs are placed on the metal wire clamping table; one end of the sliding chute support is fixedly connected with the door frame, the other end of the sliding chute support is provided with a sliding chute matched with the side frame of the first blade support, the sliding chute support is also fixedly connected with a second blade, and the first blade and the second blade can form a slit in the frame structure of the first blade support; leveling screws are arranged at four corners of the base; the telescope support is sequentially connected with a scale matched with the reflector, a telescope and a second base for leveling, and the telescope support are slidably connected and locked through a second screw; the laser support is sequentially connected with a laser generator matched with the slit and a third base for leveling.

The further technical scheme is that the experimental device further comprises coordinate paper on the other side of the slit relative to the laser support.

The utility model has the advantages that:

the utility model discloses an adopt the experiment principle of two kinds of differences to measure the tensile volume of wire simultaneously, ask the average to the numerical value that detects again, can reduce the error, simultaneously, once the experiment can make the student operate and understand two kinds of young modulus measuring experiment principles, improves teaching efficiency.

Drawings

FIG. 1 is a diagram: experimental apparatus's of integrated test wire Young modulus structure chart.

FIG. 2 is a diagram of: a portal structure chart of experimental apparatus of integrated test wire Young modulus.

FIG. 3 is a diagram of: a structure chart of first blade support of integrated test wire Young's modulus.

In the figure: 1. a gantry; 11. parallel connecting rods; 12. a top plate; 13. an optical lever support plate; 130. a through hole; 14. a chute support; 140. a chute; 15. a first base; 151. leveling screws; 2. a telescope support; 21. a scale; 22. a telescope; 23. a second base; 3. a laser support; 31. a laser generator; 32. a third base; 4. a metal wire; 41. a wire clamping table; 42. a first blade holder; 421. a first blade; 422. a second blade; 420. a slit; 43. a weight; 5. an optical lever; 50. a reflective mirror; 51. a forefoot; 52. a rear foot.

Detailed Description

As shown in fig. 1 to 3, the present embodiment provides an experimental apparatus for comprehensively testing the young's modulus of a wire, which is used for measuring the young's modulus of a wire 4, and simultaneously measuring the elongation of the wire by comprehensively using a single slit diffraction method and an optical lever method, wherein the experimental apparatus comprises: comprises a portal 1, a telescope support 2 and a laser support 3; the portal frame 1 comprises parallel connecting rods 11, a top plate 12, an optical lever supporting plate 13, a sliding chute support 14 and a first base 15 are connected to the portal frame 1, a metal wire 4 to be detected is fixedly connected to the top plate 12, a metal wire clamping table 41 and a first blade support 42 are connected to the metal wire 4, the first blade support 42 is of a frame structure, the inner side of an upper frame is connected with a first blade 421, and the middle point of the outer side of a lower frame is connected with a weight 43;

the connection mode is that the parallel connecting rod 11 is sequentially connected with a top plate 12, an optical lever supporting plate 13, a chute bracket 14 and a first base 15 from top to bottom; the top end of the metal wire 4 is fixedly connected with the top plate 12 through a first fixing clamp, the middle part of the metal wire is connected with a metal wire clamping table 41 through a second fixing clamp, and the bottom end of the metal wire is fixedly connected with the middle point of the outer side of the upper frame of the first blade support 42 through a third fixing clamp; the optical lever support plate 13 is slidably connected with the parallel connecting rod 11 and locked by a first screw, the optical lever support plate 13 is provided with a through hole 130 for accommodating the metal wire clamping table 41 to slide vertically, the optical lever 5 is fixedly connected with two front legs 51 and a rear leg 52, the front ends are fixedly connected with a reflector 50, the front legs 51 are placed on the optical lever support plate 13, and the rear leg 52 is placed on the metal wire clamping table 41; one end of the chute support 14 is fixedly connected with the parallel connecting rod 11, the other end of the chute support 14 is provided with a chute 140 matched with the side frame of the first blade support 42, the chute support 14 is also fixedly connected with a second blade 422, and the first blade 421 and the second blade 422 form a slit 420 in the frame structure of the first blade support 42; leveling screws 151 are arranged at four corners of the first base 15;

the telescope support 2 is sequentially connected with a scale 21 matched with the reflector, a telescope 22 and a second base 23 for leveling, and the telescope 22 is slidably connected with the telescope support 2 and locked by a second screw; the laser bracket 3 is sequentially connected with a laser generator 31 matched with the slit 420 and a third base 32 for leveling, wherein the laser generator 31 is electrically connected with a power supply; the experimental principle and process of the optical lever and the single slit diffraction are the prior art, and are not described herein again; the distance between the telescope support 2, the laser support 3 and the gantry 1 can be adjusted according to the actual experimental environment, the scale range and the like, and is not limited herein; the principle of the experimental device of the embodiment is as follows:

in the experimental device of the embodiment, the side frame of the first blade support 42 is matched with the chute 140 of the chute support 14, and the chute 140 can limit the first blade support 42 to slide in the vertical direction under the action of external force, so that the opposite edges of the first blade 421 and the second blade 422 can form the slit 420 in the whole experimental process; the first blade support 42 is of a rigid structure, when the weight 43 is additionally arranged at the midpoint of the outer side of the lower frame of the first blade support, the metal wire 4 is deformed under the action of the gravity of the weight 43, namely the metal wire 4 is elongated, at the moment, on one hand, the metal wire clamping table 41 drives the rear foot 52 to move downwards (namely, the reflective mirror 50 rotates around the front foot 51 of the reflective mirror), and the length variation of the metal wire 4 can be measured and calculated through the matching of the telescope 22, the scale 21 and the reflective mirror 50; on the other hand, since the second blade 422 is fixedly connected with the chute support 14 and the first blade 421 is connected with the wire 4 through the first blade support 42, when the weight 43 is added, the first blade support 42 moves downwards along the chute 140 to drive the first blade 421 to move towards the second blade 422, so that the slit 420 between the first blade 421 and the second blade 422 becomes smaller, and the length variation of the wire 4 can be measured and calculated through the matching of the laser generator 31 and the slit 420; and the experimental error is reduced by an averaging mode, and experimental data measured by two principles can be completed through one experiment.

In another embodiment, the experimental apparatus further includes a coordinate paper on the other side of the slit 420 opposite to the laser holder 3, and the coordinate paper can facilitate measurement of the fringe spacing of single slit diffraction.

The utility model discloses an experimental apparatus of integrated test wire Young modulus measures the tensile strength of wire simultaneously through adopting the experimental principle of two kinds of differences, and the numerical value that detects is averaged again, can reduce the error, and simultaneously, once the experiment can make the student operate and understand two kinds of Young modulus measuring experimental principles, improves teaching efficiency.

Claims

1. An experimental device for comprehensively testing Young modulus of a metal wire is characterized by comprising a portal frame, a telescope support and a laser support; the gantry comprises parallel connecting rods, and the parallel connecting rods are sequentially connected with a top plate, an optical lever supporting plate, a chute support and a first base from top to bottom; the top end of the metal wire is fixedly connected with the top plate, the middle part of the metal wire is fixedly connected with a metal wire clamping table, and the bottom end of the metal wire is fixedly connected with a first blade support; the first blade support is of a frame structure, the inner side of the upper frame is fixedly connected with a first blade, and the middle point of the outer side of the lower frame is connected with a weight;

the optical lever supporting plate is connected with the parallel connecting rods in a sliding manner and locked through a first screw, wherein a through hole for accommodating the metal wire clamping table to slide vertically is formed in the optical lever supporting plate, the optical lever is fixedly connected with two front legs and one rear leg, the front legs are fixedly connected with a reflector, the front legs are placed on the optical lever supporting plate, and the rear legs are placed on the metal wire clamping table; one end of the sliding chute support is fixedly connected with the parallel connecting rod, the other end of the sliding chute support is provided with a sliding chute matched with the side frame of the first blade support, the sliding chute support is also fixedly connected with a second blade, and the first blade and the second blade can form a slit in the frame structure of the first blade support; leveling screws are arranged at four corners of the first base;

the telescope support is sequentially connected with a scale matched with the reflector, a telescope and a second base for leveling, and the telescope support are slidably connected and locked through a second screw;

the laser support is sequentially connected with a laser generator matched with the slit and a third base for leveling.

2. The experimental device for comprehensively testing the Young's modulus of the metal wire as claimed in claim 1, wherein the experimental device further comprises a coordinate paper on the other side of the slit opposite to the laser support.