Device for measuring scale distance after metal uniaxial stretching fracture
By designing a metal uniaxial tensile post-break gauge length measurement device that includes a positioning base, a threaded screw, a guide screw and other components, the problems of difficult fracture joints and inaccurate measurements are solved, and high-precision post-break gauge length measurement is achieved. and improvement of work efficiency.
Patent Information
- Application Number
- CN202420839038.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-22
AI Technical Summary
In the uniaxial tensile test of metal materials, slag drops, blocks, and irregularities occurred in the fracture, which led to difficulty in connecting the fracture and difficulty in measuring the gauge distance after the break independently. It was necessary for two people to complete it together, reducing work efficiency.
Design a metal uniaxial tensile post-fracture gauge length measuring device, including a positioning base, a threaded screw, a guide screw, a beam scale, a vernier cantilever screw and an adjusting screw knob. Through these components, the accurate docking and adjustment of the specimen fracture can be achieved High-precision measurement of gauge length after breaking.
It achieves high-precision measurement of the gauge length after fracture, simplifies the operation process, reduces the need for human collaboration, improves work efficiency, and solves the problems of difficult fracture docking and inaccurate measurement.
Smart Images
Figure CN222378981U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of metal material tensile testing, and in particular relates to a metal uniaxial tensile post-fracture gauge length measuring device. Background Art
[0002] Among the mechanical properties of metal materials, elongation after fracture is an important indicator reflecting the plasticity of metal materials. The larger the value, the better the plasticity of the metal material. The gage length after fracture is one of the important values for calculating the elongation after fracture. GB / T228.1□2021 stipulates the method for determining the elongation after fracture. The two parts of the fracture are tightly connected together to ensure that the axes of the two parts are on the same straight line. The gage length Lu of the sample is measured, and the gage length Lu and the original gage length Lo are substituted into the following formula to calculate the elongation after fracture A, A = (Lu-Lo) / Lo×100%
[0003] The marking of the original gauge length and the measurement of the gauge length after fracture are particularly important. Usually, the gauge length segment is marked on the surface of the specimen before the test (dots or markers, etc.); after the test, the test technicians align the fracture ends of the broken specimen based on personal experience, measure the gauge length segment with a caliper, and finally calculate the elongation after fracture of the specimen.
[0004] However, sometimes the fracture of the sample will have slag, pieces, irregular fracture, etc., so it is very difficult to accurately align the fracture. When the sample is a steel bar or round bar profile, a slight touch when aligning the fracture after pulling will cause the steel to roll unstable, resulting in inaccurate measurement of the gauge length after breaking. It is difficult for technicians to operate and measure independently, and two people are required to complete the measurement together, which greatly reduces work efficiency.
[0005] In view of the above factors, in order to solve the above problems, a metal uniaxial tension post-fracture gauge length measuring device is specially developed, which has a simple structure, convenient operation, time and labor saving, high measurement accuracy and high work efficiency. Utility Model Content
[0006] The utility model aims to provide a device for measuring the post-fracture gauge length of metal uniaxial tension to solve the problems raised in the above-mentioned background technology.
[0007] The purpose of the utility model is achieved through the following technical solutions: a metal uniaxial tensile post-fracture gauge length measuring device, comprising a positioning base, a sample support groove is opened on the positioning base, the sample support groove is designed to be an isosceles trapezoidal style with a wide top and a narrow bottom and a thick edge, a threaded screw is installed at one side edge of the positioning base, and the threaded screw is perpendicular to the edge of the positioning base;
[0008] A guide screw is installed away from the edge on the same side of the threaded screw, and the guide screw is perpendicular to the edge of the positioning base;
[0009] The guide screw is sleeved with a beam scale, and the other end of the beam scale is mechanically connected to the threaded screw by an adjusting screw knob;
[0010] The crossbeam scale is equipped with a vernier cantilever screw I and a vernier cantilever screw II of equal length.
[0011] Furthermore, the adjusting screw knob adjusts the beam scale to rise and fall on the threaded screw.
[0012] Furthermore, the guide screw is perpendicular to the edge of the positioning base and is higher than the threaded screw. The center point of the fixed end of the guide screw and the center point of the fixed end of the threaded screw are on the center line of the edge width.
[0013] Furthermore, one end of the vernier cantilever screw screw I is sleeved on the beam scale and a rotation locking button is installed, and the other end is installed with a vernier pointer I.
[0014] Furthermore, one end of the vernier cantilever screw screw II is sleeved on the beam scale and is equipped with a rotation locking button, and the other end is equipped with a vernier pointer II.
[0015] Furthermore, the lower ends of the vernier pointer I and the vernier pointer II are at the same height and are located above the center line of the sample supporting groove of the positioning base.
[0016] Furthermore, the adjusting screw knob enables the vernier pointer I and the vernier pointer II to be raised or lowered to an appropriate height to measure the post-break gauge length.
[0017] Furthermore, a layer of absorbent cotton with a thickness of 1 cm is laid in the sample supporting groove in the positioning base.
[0018] Furthermore, a magnetic plate with a thickness of 0.5 cm is laid in the sample supporting groove in the positioning base.
[0019] Compared with the prior art, the utility model has the following beneficial effects:
[0020] The utility model has the characteristics of simple structure, convenient operation, time-saving and labor-saving, high measurement accuracy, high work efficiency, etc. It can solve the cumbersome process that requires two people to work together to complete the accurate connection of the fracture due to the phenomenon of slag, block, irregular fracture and other phenomena on the fracture of the sample after uniaxial tensile fracture, and the difficulty of independent post-fracture gauge measurement. It greatly improves work efficiency.
[0021] The utility model solves the problem that after a steel bar or round bar profile sample is pulled apart, slag or chunks fall off, and a slight touch during alignment of irregular fractures may cause rolling instability of the steel, thereby causing inaccurate measurement of the gauge length after fracture. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a main schematic diagram of the utility model;
[0023] Figure 2 It is a side view schematic diagram of the utility model;
[0024] Figure 3 It is a top view schematic diagram of the utility model. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0028] like Figure 1-3 As shown, a metal uniaxial tensile post-fracture gauge length measuring device comprises a positioning base 1, a sample support groove is provided on the positioning base 1, the sample support groove is designed to be an isosceles trapezoidal shape with a width at the top and a narrowness at the bottom and a thickness edge, a threaded screw 2 is installed at one side edge of the positioning base 1, and the threaded screw 2 is perpendicular to the edge of the positioning base 1;
[0029] A guide screw 3 is installed away from the edge of the same side of the threaded screw 2, and the guide screw 3 is perpendicular to the edge of the positioning base 1;
[0030] The guide screw 3 is sleeved with a beam scale 4, and the other end of the beam scale 4 is mechanically connected to the threaded screw 2 by an adjusting screw knob 5;
[0031] The crossbeam scale 4 is installed with a vernier cantilever screw 1 8 and a vernier cantilever screw 1 I9 of equal length.
[0032] The specimen support groove in the positioning base 1 is designed to be an isosceles trapezoidal shape that is wide at the top and narrow at the bottom and has an edge of a certain thickness, which is conducive to the accurate docking of the two parts of steel bars, round bar profile tensile specimens of different diameters and plate and strip tensile specimens of different thicknesses in the specimen support groove after breaking.
[0033] In order to facilitate the adjustment of the height of the beam scale 4 in use, the adjusting screw knob 5 adjusts the rise and fall of the beam scale 4 on the threaded screw 2.
[0034] In order to ensure that the beam scale 4 moves on the guide screw 3 and the threaded screw 2 when in use, the guide screw 3 is perpendicular to the edge of the positioning base 1 and is higher than the threaded screw 2, and the center point of the fixed end of the guide screw 3 and the center point of the fixed end of the threaded screw 2 are on the center line of the edge width;
[0035] In order to facilitate the measurement of the post-break gauge length by the vernier pointer I 6 in the use state, one end of the vernier cantilever screw I 8 is sleeved on the beam scale 4 and a rotation locking button is installed, and the vernier pointer I 6 is installed on the other end.
[0036] In order to facilitate the measurement of the post-break gauge length by the vernier pointer II 7 in the use state, one end of the vernier cantilever screw I I9 is sleeved on the beam scale 4 and a rotation locking button is installed, and the other end is installed with the vernier pointer II 7. The lower ends of the vernier pointer I6 and the vernier pointer II 7 are at the same height and are located above the center line of the sample support groove of the positioning base 1.
[0037] In order to facilitate use, the lower ends of the vernier pointer I 6 and the vernier pointer II 7 are adjusted to the same height and above the center line of the sample support groove of the base 1. In this way, the vernier pointers 6 and 7 can be raised or lowered to an appropriate height to measure the post-break gauge length through the height adjustment screw knob 5 after the post-break gauge is aligned. The adjustment screw knob 5 can raise or lower the vernier pointer I 6 and the vernier pointer II 7 to an appropriate height to measure the post-break gauge length.
[0038] In order to ensure that the two parts of the steel bar and round bar profile specimens are closely butted together after breaking, and the axes of the two parts are located on the same straight line during use, and to prevent the aligned specimens from directly contacting the bottom surface of the support groove, because even a slight touch will cause the steel to roll and become unstable, thereby causing inaccurate post-break gauge length measurement, a layer of absorbent cotton with a thickness of 1 cm is laid in the specimen support groove of the positioning base 1.
[0039] In order to ensure that the two parts of the steel bar and round bar profile specimens are closely connected after breaking, and the axes of the two parts are located on the same straight line, so as to prevent the aligned specimen from directly contacting the bottom surface of the support groove, because even a slight touch will cause the steel to roll and become unstable, thereby causing inaccurate post-break gauge length measurement, another form of the positioning base is to lay a magnetic plate with a thickness of 0.5 cm in the specimen support groove of the positioning base 1.
[0040] During operation, the two parts of the steel bars, round bar profile tensile specimens with different diameters and specifications and the plate and strip tensile specimens with different thicknesses are accurately connected in the specimen support groove; the tooth patterns are aligned and the splicing is complete, the cursor pointer I and the cursor pointer II on the beam scale can be moved, and the cursor pointer I and the cursor pointer II are raised or lowered to an appropriate height to measure the post-break gauge length by adjusting the spiral knob, so that the post-break steel bar length can be measured, and then the post-break steel bar elongation can be obtained. The utility model has the advantages of simple structure, convenient operation, time and labor saving, high measurement accuracy and high working efficiency, and a metal uniaxial tensile post-break gauge length measuring device.
[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A device for measuring the post-fracture gauge length of metal uniaxial tension, characterized in that: The positioning base (1) comprises a sample support groove, the sample support groove is designed to be an isosceles trapezoidal shape that is wide at the top and narrow at the bottom and has a thick edge, a threaded screw (2) is installed at one side edge of the positioning base (1), and the threaded screw (2) is perpendicular to the edge of the positioning base (1); A guide screw (3) is installed away from the edge on the same side as the threaded screw (2), and the guide screw (3) is perpendicular to the edge of the positioning base (1); The guide screw (3) is sleeved with a beam scale (4), and the other end of the beam scale (4) is mechanically connected to the threaded screw (2) via an adjusting screw knob (5); The crossbeam scale (4) is equipped with a vernier cantilever screw I (8) and a vernier cantilever screw II (9) of equal length.
2. The metal uniaxial tension post-fracture gauge length measuring device according to claim 1, characterized in that: The adjusting screw knob (5) adjusts the crossbeam scale (4) to rise and fall on the threaded screw (2).
3. The metal uniaxial tension post-fracture gauge length measuring device according to claim 2, characterized in that: The guide screw (3) is perpendicular to the edge of the positioning base (1) and is higher than the threaded screw (2). The center point of the fixed end of the guide screw (3) and the center point of the fixed end of the threaded screw (2) are on the center line of the edge width.
4. The metal uniaxial tension post-fracture gauge length measuring device according to claim 3, characterized in that: One end of the vernier cantilever screw rod I (8) is sleeved on the crossbeam scale (4) and is equipped with a rotation locking button, and the other end is equipped with a vernier pointer I (6).
5. The metal uniaxial tension post-fracture gauge length measuring device according to claim 4, characterized in that: One end of the vernier cantilever screw screw II (9) is sleeved on the crossbeam scale (4) and is equipped with a rotation locking button, and the other end is equipped with a vernier pointer II (7).
6. The metal uniaxial tension post-fracture gauge length measuring device according to claim 5, characterized in that: The lower ends of the vernier pointer I (6) and the vernier pointer II (7) are at the same height and are located above the center line of the sample supporting groove of the positioning base (1).
7. The metal uniaxial tension post-fracture gauge length measuring device according to claim 6, characterized in that: The adjusting screw knob (5) enables the cursor pointer I (6) and the cursor pointer II (7) to be raised or lowered to a suitable height to measure the post-break gauge length.
8. The metal uniaxial tension post-fracture gauge length measuring device according to claim 7, characterized in that: A layer of absorbent cotton with a thickness of 1 cm is laid in the sample support groove in the positioning base (1).
9. The metal uniaxial tension post-fracture gauge length measuring device according to claim 8, characterized in that: A magnetic attraction plate with a thickness of 0.5 cm is laid in the sample support groove of the positioning base (1).