Precise scribing device for notch sensitive material tensile sample

Abstract

The utility model discloses a notch sensitive material tensile sample accurate lineation device which comprises a protection assembly, a supporting assembly used for supporting is arranged on the upper portion of an inner cavity of the protection assembly, a sample is placed on the top of the supporting assembly, and a UV area light source is arranged at the bottom of the inner cavity of the protection assembly. The two sides of the protection assembly are each provided with a positioning assembly used for positioning the supporting assembly. The device is composed of the protection assembly, the supporting assembly, the UV area light source and the positioning assembly, a plurality of samples with the surfaces sprayed or brushed with photosensitive paint or UV ink can be placed through the supporting assembly, and the photosensitive paint or UV ink on the samples on the supporting assembly can be illuminated through the UV area light source; the photosensitive paint or the UV ink can change color to generate traces for measurement, so that the problem of insufficient manual scribing, mechanical scribing and laser scribing in the prior art can be solved, the gauge length consistency is ensured and the damage is reduced when the tensile property of the magnesium alloy material is tested, and the magnesium alloy material is not easily scratched and blurred during hanging extension.

Description

Technical Field

[0001] The utility model relates to the technical field of tensile specimen marking, in particular to a precise marking device for a tensile specimen of a notch-sensitive material. Background Art

[0002] Fracture is the most common orthopedic disease. The fracture internal fixation devices made of stainless steel or titanium alloy that are widely used in clinical practice have many disadvantages, such as too high elastic modulus, stress shielding, biological inertness, metal artifacts, and the need for secondary surgery to remove them after implantation.

[0003] In recent years, the research and development of a new generation of biomedical metal materials with biodegradable and absorbable properties, represented by biodegradable magnesium alloys, has been rapid. The characteristics of magnesium alloys that are easy to corrode and degrade in the human body environment and have good biosafety can completely change the design and function of existing medical metal implants. The density, Young's modulus, and yield strength of magnesium alloys are closer to those of cortical bones. Currently, tens of thousands of biodegradable magnesium alloy fracture fixation bone screws have been sold. As a medical device, the mechanical properties and degradation properties of magnesium alloys must also be considered in the manufacturing process.

[0004] Magnesium alloys used in implant materials generally have high tensile properties, usually around 500MPa. High-strength magnesium alloys generally have low elongation after fracture and are more sensitive to notches or surface defects. The presence of surface defects will significantly reduce the elongation after fracture. The general elongation after fracture of magnesium alloys is required to be between 3% and 10%. According to GB / T16865-2023, the gauge length of conventional specimens is generally 25mm.

[0005] At present, there are usually three types of marking when conducting mechanical property testing:

[0006] 1. Manual marking. The disadvantages of this method are: the influence of manual error is more significant due to the small gauge length, and the manual marking is easy to smear during the mounting extensometer, resulting in unclear marking. For products with low elongation, the error is higher.

[0007] Second, mechanical scribing is used. The disadvantage of this method is that the physical damage caused by mechanical scribing will cause premature fracture along the notch due to the notch sensitivity of the material, resulting in inaccurate performance testing.

[0008] 3. Laser scribing. The disadvantage of this method is that magnesium has active chemical properties and is flammable in the air. Laser scribing is prone to fire even with a lower-power semiconductor laser, which is not safe enough.

[0009] To this end, we propose a precise scoring device for tensile specimens of notch-sensitive materials. Utility Model Content

[0010] The utility model aims to provide a precise marking device for a tensile specimen of a notch-sensitive material, which is used to solve the problems raised by the above-mentioned background technology.

[0011] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0012] A device for accurately marking a tensile specimen of a notch-sensitive material, comprising:

[0013] A protective component, wherein a supporting component is provided at the upper part of the inner cavity thereof, a sample is placed on the top of the supporting component, a UV surface light source is provided at the bottom of the inner cavity of the protective component, and positioning components for positioning the supporting component are provided on both sides of the protective component;

[0014] Among them, the supporting component includes a support plate which is detachably connected to the protective component through a positioning component, and the top of the support plate is provided with a plurality of regularly distributed light-transmitting slits along its width direction, and the top of the support plate is provided with a plurality of first grooves for forming a sample placement space along its length direction, and the plurality of first grooves are equidistantly distributed, and the light-transmitting slits and the first grooves are connected to each other.

[0015] As a preferred technical solution, a second groove is opened at the center of the bottom of the inner cavity of the first groove, the first groove is a rectangular groove, and the second groove is a V-shaped groove.

[0016] As a preferred technical solution, the protection component includes a shell, a baffle is integrally formed on the top of the shell, the support plate is arranged on the baffle, and the UV surface light source is installed at the bottom of the inner cavity of the shell.

[0017] As a preferred technical solution, a mounting groove adapted to the support plate is provided at the center of the baffle surface, and a baffle ring is integrally formed on the top of the baffle.

[0018] As a preferred technical solution, the positioning assembly includes through grooves opened on both sides of the retaining ring surface, the inner cavity of the through groove is movably connected with a positioning block, and one side of the bottom of the positioning block contacts the top of the support plate.

[0019] As a preferred technical solution, a support is movably provided on one side of the surface of the positioning block, and the top and bottom ends of the support are fixedly connected to the inner wall surface of the through groove.

[0020] As a preferred technical solution, the surface of the support is rotationally connected to the penetration point of the positioning block via a damping shaft.

[0021] The utility model has at least the following beneficial effects:

[0022] The present application is mainly composed of a protective component, a supporting component, a UV surface light source and a positioning component. The supporting component can be used to place multiple samples sprayed or painted with photosensitive paint or UV ink. The UV surface light source can illuminate the photosensitive paint or UV ink on multiple samples on the supporting component. The photosensitive paint or UV ink can change color to produce traces for measurement, thereby overcoming the problems of existing manual scribing, mechanical scribing and laser scribing, ensuring the consistency of the gauge length and reducing damage when testing the tensile properties of magnesium alloy materials, and not being easily scratched or blurred during mounting and extension. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural stereoscopic schematic diagram of a precise marking device for a tensile specimen of a notch-sensitive material according to the utility model;

[0024] Figure 2 It is a schematic diagram of a three-dimensional cross-section of the structure of a precise marking device for a tensile specimen of a notch-sensitive material according to the utility model;

[0025] Figure 3 It is a structural stereoscopic schematic diagram of a protective component of a precise marking device for a tensile specimen of a notch-sensitive material according to the utility model;

[0026] Figure 4 This utility model is a precise marking device for tensile specimens of notch-sensitive materials Figure 2 A schematic diagram of the enlarged structure of point A;

[0027] Figure 5 The utility model is a structural stereoscopic schematic diagram of a positioning block and a supporting column of a precise marking device for a tensile specimen of a notch-sensitive material.

[0028] In the figure: 1. protection component; 11. shell; 111. retaining ring; 12. baffle; 13. mounting groove; 2. support component; 21. support plate; 22. light-passing slit; 23. first groove; 231. second groove; 3. sample; 4. UV surface light source; 5. positioning component; 51. through groove; 52. positioning block; 521. pillar. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-Figure 5The embodiment of the utility model provides a precise marking device for a tensile specimen of a notch-sensitive material, comprising: a protective component 1, a supporting component 2 for supporting a sample 3, a UV surface light source 4, and a positioning component 5 for positioning the supporting component 2, wherein the supporting component 2 is arranged at the upper part of the inner cavity of the protective component 1, the UV surface light source 4 is arranged at the bottom of the inner cavity of the protective component 1, and the positioning component 5 is provided on both sides of the protective component 1; the supporting component 2 comprises a support plate 21 which is detachably connected to the protective component 1 through the positioning component 5, a plurality of regularly distributed light-transmitting slits 22 are provided on the top of the support plate 21 along its width direction, the light-transmitting slits 22 can be designed and processed according to the required gauge spacing, a plurality of first grooves 23 for forming a space for placing the sample 3 are provided on the top of the support plate 21 along its length direction, the plurality of first grooves 23 are equidistantly distributed, and the light-transmitting slits 22 and the first grooves 23 are connected to each other.

[0031] It should be noted that the principle of the above-mentioned UV surface light source 4 is existing technology, so it will not be described in detail in this technical solution.

[0032] A second groove 231 is provided at the center of the bottom of the inner cavity of the first groove 23 . The first groove 23 is a rectangular groove, and the second groove 231 is a V-shaped groove. Plates can be placed through the first groove 23 , and rods can be placed through the second groove 231 .

[0033] Among them, the protective component 1 includes a shell 11, a baffle 12 is integrally formed on the top of the shell 11, the baffle 12 is horizontally arranged, the support plate 21 is arranged on the baffle 12, and the UV surface light source 4 is installed at the bottom of the inner cavity of the shell 11. Through the coordinated use of the shell 11 and the baffle 12, light leakage can be prevented.

[0034] Among them, a mounting groove 13 adapted to the support plate 21 is opened at the center of the surface of the baffle 12, and a retaining ring 111 is integrally formed on the top of the baffle 12. The wall thickness of the retaining ring 111 is less than the wall thickness of the shell 11. By placing the support plate 21 in the inner cavity of the mounting groove 13, the support plate 21 can be supported by the top of the shell 11. Through the coordinated setting of the mounting groove 13 and the retaining ring 111, a limiting effect can be played on the four sides of the support plate 21 to prevent the support plate 21 from shaking in the inner cavity of the mounting groove 13.

[0035] Among them, the positioning component 5 includes a through groove 51 opened on both sides of the surface of the retaining ring 111, and the inner cavity of the through groove 51 is movably connected with a positioning block 52. One side of the bottom of the positioning block 52 contacts the top of the support plate 21. The positioning block 52 can limit the support plate 21, effectively preventing the support plate 21 from shaking up and down in the inner cavity of the installation groove 13, and at the same time facilitate the assembly operation of the support component 2 and the protective component 1, and facilitate the subsequent replacement of different support components 2 according to actual marking requirements.

[0036] Among them, a pillar 521 is movably provided on one side of the surface of the positioning block 52, and the top and bottom ends of the pillar 521 are fixedly connected to the inner wall surface of the through groove 51. By moving the positioning block 52, the positioning block 52 can be rotated in the inner cavity of the through groove 51 with the pillar 521 as the axis. When the through groove 51 is separated from the top of the support plate 21, the support plate 21 can be unlocked; when the through groove 51 is rotated to the top of the support plate 21, the support plate 21 can be positioned.

[0037] Among them, the surface of the pillar 521 is rotationally connected to the penetration point of the positioning block 52 through the damping shaft. The rotational connection between the positioning block 52 and the pillar 521 is realized through the damping shaft, which can maintain the torsion angle fixing function and ensure that the positioning block 52 does not loosen after rotation, thereby helping to improve the positioning effect of the positioning block 52.

[0038] The working principle of the utility model is: first, the surface of the processed plate-shaped or rod-shaped sample 3 is cleaned to remove the surface processing oil film, and the surface of the sample 3 is sprayed or painted with photosensitive paint or UV ink, and then dried;

[0039] Secondly, place the dried sample 3 on the support plate 21. Multiple samples 3 can be placed in sequence. When the sample 3 is in the shape of a plate, it is placed in the inner cavity of the first groove 23; when the sample 3 is in the shape of a rod, it is placed in the inner cavity of the second groove 231. The positions of the samples 3 are adjusted so that the ends of the samples 3 are aligned and the symmetry center of the sample 3 is aligned with the center of the support plate 21.

[0040] Next, the UV surface light source 4 is turned on, so that the specific ultraviolet light emitted by the UV surface light source 4 irradiates the sample 3 through the light-passing slit 22. Since the photosensitive paint or UV ink is sensitive to ultraviolet light, the ultraviolet light will produce a photochemical reaction on the photosensitive paint or UV ink of the sample 3, causing the photosensitive paint or UV ink to change color to yellow or other colors, forming a marking line different from the original color;

[0041] Finally, the cured engraved lines can be used as marking lines without damaging the magnesium alloy substrate and are not easily scratched or blurred during mounting and extension.

[0042] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for accurately marking tensile specimens of notch-sensitive materials, characterized in that: include: A protection component (1) having an upper inner cavity provided with a support component (2) for supporting, a sample (3) placed on the top of the support component (2), a UV surface light source (4) provided at the bottom of the inner cavity of the protection component (1), and positioning components (5) for positioning the support component (2) provided on both sides of the protection component (1); The support assembly (2) comprises a support plate (21) which is detachably connected to the protection assembly (1) through a positioning assembly (5); a plurality of regularly distributed light-transmitting slits (22) are provided on the top of the support plate (21) along its width direction; a plurality of first grooves (23) for forming a space for placing a sample (3) are provided on the top of the support plate (21) along its length direction; the plurality of first grooves (23) are equidistantly distributed; and the light-transmitting slits (22) and the first grooves (23) are interconnected.

2. The device for accurately marking a tensile specimen of a notch-sensitive material according to claim 1, characterized in that: A second groove (231) is provided at the center of the bottom of the inner cavity of the first groove (23); the first groove (23) is a rectangular groove, and the second groove (231) is a V-shaped groove.

3. The device for accurately marking a tensile specimen of a notch-sensitive material according to claim 1, characterized in that: The protective component (1) comprises a shell (11), a baffle (12) is integrally formed on the top of the shell (11), the support plate (21) is arranged on the baffle (12), and the UV surface light source (4) is installed at the bottom of the inner cavity of the shell (11).

4. The device for accurately marking a tensile specimen of a notch-sensitive material according to claim 3, characterized in that: A mounting groove (13) adapted to the support plate (21) is provided at the center of the surface of the baffle plate (12), and a baffle ring (111) is integrally formed on the top of the baffle plate (12).

5. The device for accurately marking a tensile specimen of a notch-sensitive material according to claim 4, characterized in that: The positioning assembly (5) comprises through grooves (51) formed on both sides of the surface of the retaining ring (111), the inner cavity of the through groove (51) being movably connected to a positioning block (52), and one side of the bottom of the positioning block (52) is in contact with the top of the support plate (21).

6. The device for accurately marking a tensile specimen of a notch-sensitive material according to claim 5, characterized in that: A support (521) is movably provided on one side of the surface of the positioning block (52), and the top and bottom ends of the support (521) are fixedly connected to the inner wall surface of the through groove (51).

7. The device for accurately marking a tensile specimen of a notch-sensitive material according to claim 6, characterized in that: The surface of the support (521) is rotatably connected to the penetration point of the positioning block (52) via a damping shaft.

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