CN217484018U - Young modulus experiment instrument - Google Patents
Young modulus experiment instrument Download PDFInfo
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- CN217484018U CN217484018U CN202221299067.6U CN202221299067U CN217484018U CN 217484018 U CN217484018 U CN 217484018U CN 202221299067 U CN202221299067 U CN 202221299067U CN 217484018 U CN217484018 U CN 217484018U
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Abstract
The utility model discloses a Young modulus experiment appearance, including the volume of awaiting measuring wire, still include base, scale, reflection component, go up the chuck, lower chuck, application of force screw rod and force sensor, reflection component includes platen, installing frame, speculum and moves sufficiently, the beneficial effects of the utility model are that, the upper and lower both ends of wire are fixed respectively through last chuck and lower chuck, and at this in-process, rotate through the application of force screw rod and exert pressure to the wire, at reflection component basis optical lever's principle, enlarge and show the deformation of wire on the scale, through the reading on the scale can be accurate obtain the deformation of wire, the rethread force sensor can record the pressure that the wire received this moment, can obtain the Young modulus of this wire, and it is convenient and accurate to measure.
Description
Technical Field
The utility model relates to a young modulus measures technical field, concretely relates to young modulus experiment appearance.
Background
Young's modulus is an important physical quantity describing the elastic deformation capability of a solid material, is one of the bases for selecting materials of mechanical components, and is a parameter commonly used in engineering technology.
Among the prior art, carry out tensile application to the measuring wire of awaiting measuring through balance weight or weight, then the deformation of rethread scale measurement wire under different pulling forces, this kind of experimental mode is when carrying out young modulus measurement, because the deformation of wire is generally less, when carrying out the measurement of wire deformation through the scale, appears measuring the inaccurate condition easily.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a young modulus experiment appearance, the utility model discloses a realize through following technical scheme.
A Young modulus experiment instrument comprises a metal wire to be measured, a base, a scale, a reflection assembly, an upper chuck, a lower chuck, a force application screw and a tension sensor; the upper surface of the base is symmetrically and fixedly connected with supporting rods in front and back, the top of each supporting rod is fixedly connected with a top plate, the right side of each top plate is fixedly connected with a support plate, and the scale is fixedly connected to the lower surface of the support plate;
the reflecting assembly comprises a bedplate, a mounting frame, a reflecting mirror and a movable foot; the front side and the rear side of the bedplate are symmetrically and fixedly connected with inserting sleeves, supporting rods on the front side and the rear side are respectively inserted and fixed in the inserting sleeves on the front side and the rear side, supports are symmetrically and fixedly connected with the front side and the rear side of the upper surface of the bedplate, the mounting frame is rotatably connected between the supports through rotating shafts which are symmetrical in the front and the rear direction, the reflector is fixedly connected to the right side of the mounting frame, and the movable foot is fixedly connected to the left side of the mounting frame;
the upper chuck is arranged below the top plate, and the lower chuck is connected in the bedplate in a sliding manner;
a mounting plate is fixedly connected between the support rods below the bedplate, the force application screw rod is meshed in the mounting plate, and a hand wheel is fixedly connected to the bottom of the force application screw rod;
the top of the tension sensor is fixedly connected with a U-shaped mounting rack, and the bottom of the lower chuck is rotatably connected between two vertical plates of the mounting rack.
Furthermore, a threaded sleeve is fixedly connected to the top plate at a position corresponding to the lower chuck, a tensioning screw rod is engaged in the threaded sleeve, the lower chuck is fixedly connected to the bottom of the tensioning screw rod, and a knob is fixedly connected to the top of the tensioning screw rod.
Furthermore, a horizontal clamping seat is fixedly connected to the top of the support at the front side, and when the movable foot is in a horizontal state, the distance between the toe of the movable foot and the axis of the rotating shaft is equal to the length of the horizontal clamping seat.
Further, shown scale is made for transparent material, and the lower surface of scale is equipped with the scale mark, the light trap has been seted up to the position that corresponds the scale on the mounting panel, and the upper surface of mounting panel still rigid coupling has the cover body, the internal light that is equipped with of cover.
Further, the telescope is fixed through the support and is arranged opposite to the reflector.
Furthermore, the tension meter is further included, and the tension meter is electrically connected with the tension sensor.
The beneficial effects of the utility model are that, the upper and lower both ends of wire are fixed respectively through last chuck and lower chuck, at this in-process, rotation through the application of force screw rod is exerted pressure to the wire, at the principle of reflection assembly according to the optical lever, enlarge and show the deformation of wire on the scale, through the deformation that obtains the wire that reading on the scale can be accurate, rethread force sensor can record the pressure that the wire received this moment, can obtain the young modulus of this wire, it is convenient and accurate to measure.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some examples of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1: the utility model discloses a structural schematic diagram of a Young modulus experimental instrument;
FIG. 2 is a schematic diagram: the utility model discloses a connection schematic diagram of a reflection assembly, a lower chuck, a force application screw rod and a tension sensor;
FIG. 3: the utility model discloses an installation schematic diagram of a reflector;
FIG. 4 is a schematic view of: the installation schematic diagram of the upper chuck of the utility model;
FIG. 5 is a schematic view of: the utility model discloses an installation schematic diagram of a scale;
FIG. 6: the schematic view of the light transmission groove of the utility model;
FIG. 7: a schematic diagram is kept away from in measurement of young modulus experiment appearance.
The reference numbers are as follows:
a-metal wire, 1-base, 11-support rod, 12-top plate, 2-scale, 21-support plate, 22-graduation line, 23-light-transmitting groove, 24-cover body, 3-reflection assembly, 31-table plate, 32-installation frame, 33-reflector, 34-movable foot, 35-plug bush, 36-support, 37-rotating shaft, 38-horizontal clamping seat, 4-upper clamping head, 41-threaded sleeve, 42-tensioning screw, 43-knob, 5-lower clamping head, 6-force application screw, 61-installation plate, 62-hand wheel, 7-tension sensor, 71-installation frame, 8-telescope, 81-support and 9-tension meter.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-7, a young's modulus experimental instrument comprises a metal wire a to be measured, a base 1, a scale 2, a reflection assembly 3, an upper chuck 4, a lower chuck 5, a force application screw 6 and a tension sensor 7; the upper surface of the base 1 is symmetrically and fixedly connected with supporting rods 11 in front and back, the top of each supporting rod 11 is fixedly connected with a top plate 12, the right side of each top plate 12 is fixedly connected with a support plate 21, and the scale 2 is fixedly connected to the lower surface of each support plate 21;
the reflecting assembly 3 comprises a bedplate 31, a mounting frame 32, a reflecting mirror 33 and a movable foot 34; the front side and the rear side of the bedplate 31 are symmetrically and fixedly connected with inserting sleeves 35, the supporting rods 11 on the front side and the rear side are respectively inserted and fixed in the inserting sleeves 35 on the front side and the rear side, the front side and the rear side of the upper surface of the bedplate 31 are symmetrically and fixedly connected with supporting seats 36, the mounting frame 32 is rotatably connected between the supporting seats 36 through rotating shafts 37 which are symmetrical front to rear, the reflector 33 is fixedly connected to the right side of the mounting frame 32, and the movable foot 34 is fixedly connected to the left side of the mounting frame 32;
the upper chuck 4 is arranged below the top plate 12, and the lower chuck 5 is connected in the bedplate 31 in a sliding way;
a mounting plate 61 is fixedly connected between the support rods 11 below the bedplate 31, the force application screw 6 is meshed in the mounting plate 61, and the bottom of the force application screw 6 is fixedly connected with a hand wheel 62;
the top of the tension sensor 7 is fixedly connected with a U-shaped mounting frame 71, and the bottom of the lower chuck 5 is rotatably connected between two vertical plates of the mounting frame 71.
Preferably, a threaded sleeve 41 is fixedly connected to the top plate 12 at a position corresponding to the lower chuck 5, a tension screw 42 is engaged in the threaded sleeve 41, the lower chuck 5 is fixedly connected to the bottom of the tension screw 42, and a knob 43 is fixedly connected to the top of the tension screw 42.
Preferably, a horizontal clamping seat 38 is fixedly connected to the top of the front side support 36, and when the movable foot 34 is in a horizontal state, the distance between the toe of the movable foot 34 and the axis of the rotating shaft 37 is equal to the length of the horizontal clamping seat 38.
Preferably, the scale 2 that shows is made for transparent material, and the lower surface of scale 2 is equipped with scale mark 22, and the light-transmitting groove 23 has been seted up to the position that corresponds scale 2 on the mounting panel 21, and the upper surface of mounting panel 21 still rigid coupling has a cover body 24, is equipped with the light in the cover body 24.
Preferably, the telescope 8 is further included, the telescope 8 is fixed through a support 81, and the telescope 8 is arranged opposite to the reflecting mirror 33.
Preferably, the tension meter 9 is further included, and the tension meter 9 is electrically connected with the tension sensor 7.
The utility model discloses a concrete implementation does:
the upper end and the lower end of the metal wire A are fixed through the upper chuck 4 and the lower chuck 5 respectively, the tensioning screw rod 42 can be driven to move up and down in the threaded sleeve 41 through rotation of the knob 43, so that the metal wire A is tensioned, the force application screw rod 6 can be driven to rotate through the hand wheel 62, the metal wire A can be pulled when the force application screw rod 6 moves downwards in the mounting plate 61, and the tension force applied to the metal wire A can be measured through the tension sensor 7 and displayed on the tension meter 9.
In the measuring process, the toe of the movable foot 34 is placed on the lower chuck 5, when the lower chuck 5 moves downwards and tension is applied to the wire a, the assembly of the movable foot 34 is always placed on the lower chuck 5 under the action of gravity, and at this time, the angle between the mounting frame 32 and the reflector 33 changes.
When the metal wire A is in a tensioning state, resetting the tension meter 9, and measuring the length of the metal wire A between the upper chuck 4 and the lower chuck 5 by a measuring tape and recording the length as L; measuring an optical lever constant through a vernier caliper, namely the length of the horizontal clamping seat 38, and recording as D; the distance between the scale 2 and the axis of the rotating shaft 37 is marked as H; measuring the diameter of the metal wire A by a screw micrometer and marking as d;
as shown in FIG. 7, in the initial state, the normal of the reflector 33 forms an angle with the horizontal direction, and the scale x of the scale 2 can be seen in the telescope 8 1 When the metal wire a is elongated, a small elongation Δ L is generated, the toe of the movable foot 34 descends and drives the reflector 33 to rotate by a corresponding angle θ, according to the law of reflection of light, under the condition that the emergent light (i.e. the light entering the telescope 8) is not changed, the incident light rotates by 2 θ, and at the moment, the scale 2 of the scale 2 is seen in the telescope 8 as x 2 。
In the experiment, D > Δ L, so θ will be even small, 2 θ. From the geometry of fig. 1, we can see that 2 θ is very small:
ΔL≈D·θ，Δx≈H·2θ
therefore, the method comprises the following steps:
this makes it possible to amplify the small deformation Δ L of the wire a into a large displacement Δ x which can be easily measured.
The mass of the wire a can be measured on the load cell, and the tensile force of the wire a can be determined by the formula F ═ mg (g is a neutral acceleration).
And the deformation quantity delta L of the metal wire A under the action of external force, the length, the sectional area S and the acting force F of the metal wire A meet Hooke' S law:
the proportionality coefficient Y is the young's modulus of the wire a, from which it can be seen that:
for a cylindrical wire a with a diameter d, its young's modulus is:
the formula is as follows:
substituting, the following equation can be obtained:
in the above formula: m, L, H, D and D are obtained by measurement;
Δ x is read by the scale 2;
g and pi are constants, namely the Young modulus value of the metal wire A can be conveniently obtained through the formula.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The Young's modulus tester comprises a metal wire to be measured, and is characterized in that: the device also comprises a base, a scale, a reflection assembly, an upper chuck, a lower chuck, a force application screw and a tension sensor; the upper surface of the base is symmetrically and fixedly connected with supporting rods in front and back, the top of each supporting rod is fixedly connected with a top plate, the right side of each top plate is fixedly connected with a support plate, and the scale is fixedly connected to the lower surface of the support plate;
the reflecting assembly comprises a bedplate, a mounting frame, a reflecting mirror and a movable foot; the front side and the rear side of the bedplate are symmetrically and fixedly connected with plug bushes, the supporting rods on the front side and the rear side are respectively inserted and fixed in the plug bushes on the front side and the rear side, the front side and the rear side of the upper surface of the bedplate are symmetrically and fixedly connected with supports, the mounting frame is rotationally connected between the supports through rotating shafts which are symmetrical in the front and the rear direction, the reflector is fixedly connected to the right side of the mounting frame, and the movable foot is fixedly connected to the left side of the mounting frame;
the upper chuck is arranged below the top plate, and the lower chuck is connected in the bedplate in a sliding manner;
a mounting plate is fixedly connected between the support rods below the bedplate, the force application screw rod is meshed in the mounting plate, and a hand wheel is fixedly connected to the bottom of the force application screw rod;
the top of the tension sensor is fixedly connected with a U-shaped mounting rack, and the bottom of the lower chuck is rotatably connected between two vertical plates of the mounting rack.
2. The young's modulus tester as claimed in claim 1, wherein: the top plate is fixedly connected with a threaded sleeve corresponding to the lower chuck, a tensioning screw rod is engaged in the threaded sleeve, the lower chuck is fixedly connected to the bottom of the tensioning screw rod, and a knob is fixedly connected to the top of the tensioning screw rod.
3. The young's modulus tester as claimed in claim 1, wherein: the top of the support at the front side is fixedly connected with a horizontal clamping seat, and when the movable foot is in a horizontal state, the distance between the toe of the movable foot and the axis of the rotating shaft is equal to the length of the horizontal clamping seat.
4. The young's modulus tester as claimed in claim 1, wherein: the scale that shows is made for transparent material, and the lower surface of scale is equipped with the scale mark, the light trap has been seted up to the position that corresponds the scale on the mounting panel, and the upper surface of mounting panel still rigid coupling has the cover body, the internal light that is equipped with of cover.
5. The young's modulus tester as claimed in claim 1, wherein: the telescope is fixed through the support and is arranged right opposite to the reflector.
6. The young's modulus tester as claimed in claim 1, wherein: the tension meter is electrically connected with the tension sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221299067.6U CN217484018U (en) | 2022-05-26 | 2022-05-26 | Young modulus experiment instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221299067.6U CN217484018U (en) | 2022-05-26 | 2022-05-26 | Young modulus experiment instrument |
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| Publication Number | Publication Date |
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| CN217484018U true CN217484018U (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221299067.6U Active CN217484018U (en) | 2022-05-26 | 2022-05-26 | Young modulus experiment instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693378A (en) * | 2020-07-31 | 2020-09-22 | 西京学院 | Device for measuring Young modulus of metal wire |
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- 2022-05-26 CN CN202221299067.6U patent/CN217484018U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693378A (en) * | 2020-07-31 | 2020-09-22 | 西京学院 | Device for measuring Young modulus of metal wire |
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