Device and method for detecting size of impact sample

Abstract

The invention provides a device and a method for detecting the size of an impact sample, and relates to the technical field of mechanical property detection. The device comprises a U-shaped base, a rectangular frame and a pressing rod. The U-shaped base is in a right-angle U shape, and a V-shaped positioning guide rail is arranged in the middle of the U-shaped base. The core part of the rectangular frame is of a hollow structure, and the U-shaped base is nested in the rectangular frame and is fixed through a fixing bolt to form a sample groove; a connecting rod with a handle is arranged at the other end of the pressing rod, and the connecting rod is fixed through the boss after being inserted into the through hole of the support; by adjusting the relative position of the U-shaped base and the rectangular frame, the lower edge of the pressing rod makes contact with the sample, and rapid detection of the size of the sample is achieved. According to the invention, multiple pieces of size information of the sample can be obtained through one-time detection and calibration, compared with a traditional manual and instrument measurement mode, the detection time of a single sample is greatly shortened, the rapid detection requirement of a large batch of samples can be met, the detection efficiency is effectively improved, the detection period is shortened, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of mechanical property testing technology, and more particularly to a device and method for testing the size of impact specimens. Background Technology

[0002] In the testing of metallic materials, the Charpy impact test is a widely used method to evaluate the toughness of materials under high-speed impact loads, ensuring product quality and safety. This test has extremely stringent requirements for the dimensional accuracy of the impact specimens, as even minute deviations in specimen dimensions can significantly affect the test results, leading to inaccuracies and consequently impacting the evaluation of material properties.

[0003] Currently, common methods for measuring the dimensions of Charpy impact test specimens mainly rely on traditional measuring tools, such as micrometers and vernier calipers, as well as optical measuring equipment, such as projectors. When using micrometers and vernier calipers, manual operation is required to measure each dimension of the specimen individually. This method can meet the testing needs for a small number of specimens, but when testing a large batch of specimens, the measurement efficiency is extremely low. Furthermore, manual operation is prone to introducing human error; differences in measurement techniques and force applied by different operators can lead to inconsistencies in the measurement results, affecting the accuracy and reliability of the test results.

[0004] While optical measurement equipment improves measurement accuracy to some extent, its operation is relatively complex and requires professional personnel. Moreover, each measurement requires a series of tedious operations such as sample positioning and focusing, resulting in slow measurement speeds that are difficult to meet the demands of rapid testing in large-scale production.

[0005] Based on the aforementioned technical problems, a rapid detection device for impact specimen size is proposed, which can quickly and accurately detect the size of Charpy impact specimens. Summary of the Invention

[0006] To address the aforementioned technical problems of complex procedures and low efficiency in detecting major dimensions of impact specimens in existing technologies, this invention provides a device and method for detecting the dimensions of impact specimens. This invention enables rapid and accurate measurement of Charpy impact specimen dimensions, improving detection efficiency and precision while reducing human error.

[0007] The technical means employed in this invention are as follows: An impact specimen size detection device includes a U-shaped base, a rectangular frame, and a pressure rod. The U-shaped base is a right-angled U-shape, and a V-shaped positioning guide rail is provided in the middle of the U-shaped base. The core of the rectangular frame is hollow, and the U-shaped base is nested inside the rectangular frame and fixed by fixing bolts to form a specimen groove. One end of the pressure rod has a boss, and the other end has a connecting rod with a handle. The connecting rod is inserted into the through hole of the support and fixed by the boss. By adjusting the relative position of the U-shaped base and the rectangular frame, the lower edge of the pressure rod contacts the specimen, thereby achieving rapid detection of the specimen size.

[0008] Furthermore, the V-shaped positioning guide rail of the U-shaped base is matched with the V-shaped notch of the standard impact specimen, and the guide rail angle of the V-shaped positioning guide rail is 45°±2°, which is used to guide the placement of the specimen notch.

[0009] Furthermore, the fixing bolt passes through the threaded through hole on the side frame of the rectangular frame to fix the U-shaped base inside the rectangular frame, ensuring the stability of the sample slot; the relative position of the U-shaped base and the rectangular frame can be adjusted by tightening the bolt to adapt to the testing requirements of different samples.

[0010] Furthermore, the distance between the two arms of the U-shaped base matches the length of the standard impact specimen, and the distance between the two arms is 55±0.6mm.

[0011] Furthermore, the rectangular frame is provided with supports on both sides, with a countersunk hole at one end and a through hole with a notch at the other end.

[0012] The present invention also provides a method for detecting the size of an impact specimen, comprising the following steps: The U-shaped base is nested inside the rectangular frame and fixed with fixing bolts to form a sample groove; Place the impact specimen into the specimen slot with the notch facing down along the V-shaped positioning guide rail; Press in the pressure bar and adjust the relative position of the U-shaped base and the rectangular frame so that the lower edge of the pressure bar contacts the sample; By checking whether the sample can be placed in the sample slot and whether the pressure bar can be pressed in, the length, notch position, and ligament width of the sample can be quickly determined to be qualified.

[0013] Furthermore, if the notch direction of the specimen is placed along the V-shaped positioning guide rail of the U-shaped base, and the length dimension of the impact specimen exceeds the positive tolerance or the perpendicularity and parallelism of the specimen end face do not meet the standard requirements, the specimen cannot be placed in the specimen slot, and the specimen length dimension is unqualified.

[0014] Furthermore, if the length of the sample exceeds the negative tolerance when it is placed, a feeler gauge can be used to verify whether it is qualified.

[0015] Furthermore, when placing the sample on the V-shaped positioning guide rail of the sample slot, if the notch position is not centered or not parallel to the end face, the sample cannot be placed in the sample slot, and the notch size of the sample is unqualified.

[0016] Further, press in the pressure rod, adjust the relative position of the U-shaped base and the rectangular fixing frame so that the lower edge of the pressure rod contacts the sample, tighten the fixing bolts, and ensure that the distance from the lower edge of the pressure rod to the cutting edge of the V-shaped positioning guide rail is 8±0.075mm of the sample ligament width. If the sample ligament width is out of tolerance, the guide rod cannot be pressed in, and the sample ligament width dimension is unqualified.

[0017] Compared with the prior art, the present invention has the following advantages: 1. This invention can obtain multiple dimensional information of a sample in a single test and calibration. Compared with traditional manual and instrument measurement methods, it greatly shortens the test time of a single sample, meets the rapid test requirements of a large number of samples, effectively improves test efficiency, reduces the test cycle, and lowers production costs.

[0018] 2. This invention measures the three-dimensional dimensional parameters of impact specimens, effectively improving the detection efficiency and measurement accuracy of impact specimens, and realizing high-efficiency and high-precision measurement of the dimensions and notch angle parameters of impact specimens.

[0019] 3. This invention enables rapid acceptance of the processing quality of impact test specimens before testing, further ensuring the processing quality of the samples and shortening the test preparation time. This tooling is safe, reliable, and easy to use. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is the overall assembly diagram of the device in this embodiment.

[0022] Figure 2 shows the three views of the rectangle in this embodiment: (a) is the front view of the rectangle, (b) is the left view of the rectangle, and (c) is the top view of the rectangle.

[0023] Figure 3 is a schematic diagram of the pressure bar in this embodiment. (a) is a top view of the pressure bar, and (b) is a left view of the pressure bar.

[0024] In the diagram: 1. Pressure bar; 2. U-shaped base; 3. Rectangular frame; 4. Sample; 5. Fixing bolt. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0029] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0030] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0031] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0032] like Figure 1 As shown in Figure 3, the present invention provides an impact sample size detection device, which includes a U-shaped base 2, a rectangular frame 3, a pressure rod 1, and fixing bolts 5.

[0033] The U-shaped base 2 is in the shape of a right-angled "U". The distance between the two arms of the U is 55±0.6mm, which is consistent with the upper deviation of the standard impact specimen 4 length of 55±0.6mm. The width is about 150mm, which can accommodate 15 impact specimens 4 side by side. The middle position of the U-shaped base 2 is designed with a "V" shaped positioning guide rail parallel to the two wings of the U. The guide rail is designed with an angle of 45°±2°, which is perfectly matched with the standard impact V-groove. The core of the rectangular frame 3 is rectangular and hollow. The U-shaped base 2 is fitted into the core of the rectangular frame 3. Threaded through holes are opened on both sides of the side frame of the rectangular frame 3. The U-shaped base 2 is fixed by bolts through the threaded through holes of the rectangular frame 3. The two sides of the rectangular frame 3 are designed as supports. One end of the support has a countersunk hole and the other end is designed as a through hole with a notch. One end of the pressure rod 1 is designed with a boss, and the other end is designed as a connecting rod with a handle. The connecting rod has a boss. One end of the pressure rod 1 can be inserted into the countersunk hole of the rectangular frame 3 support, and the other end is first inserted into the support through the connecting rod and then enters the boss.

[0034] A method for detecting four dimensions of impact specimens: The U-shaped base 2 is fitted into the rectangular frame 3. The U-shaped base 2 is fixed by bolts through the horizontal threaded through hole of the rectangular frame 3, so that the whole device can form a solid sample groove. In this mating structure of rectangular frame 3 and U-shaped base 2, the notch direction of sample 4 is placed along the "V" shaped positioning guide rail of U-shaped base 2. If the length dimension of impact sample 4 exceeds the positive tolerance or the perpendicularity and parallelism of the end face of sample 4 do not meet the standard requirements, sample 4 cannot be placed in the sample slot and the length dimension of sample 4 is unqualified. If the length dimension of sample 4 exceeds the negative tolerance when it is placed, a feeler gauge can be used to verify whether it is qualified. When placing sample 4 according to the "V" shaped positioning guide rail of the sample groove, if the notch position is not centered or not parallel to the end face, sample 4 cannot be placed in the sample groove and the notch size of sample 4 is unqualified. Press in the pressure rod 1, adjust the relative position of the U-shaped base 2 and the rectangular frame 3 so that the lower edge of the pressure rod 1 contacts the sample 4, tighten the bolts, and ensure that the distance from the lower edge of the pressure rod 1 to the cutting edge of the "V"-shaped positioning guide is 8 ± 0.075 mm of the ligament width of the sample 4. If the ligament width of the sample 4 is out of tolerance, the pressure rod 1 cannot be pressed in, and the ligament width dimension of the sample 4 is unqualified.

[0035] Through the implementation of the above technical solution, the main dimensions of the impact sample 4, such as the length, parallelism and perpendicularity of the end face, notch position, notch angle and ligament width, can be quickly and easily detected in one go. Unqualified samples 4 are directly rejected. 10-15 samples 4 can be detected at the same time each time.

[0036] Example 1 like Figure 1 As shown in Figure -3, a batch of standard Charpy impact test specimens 4, made of Q235 steel, with standard dimensions of 55mm × 10mm × 10mm, featuring a V-notch with a depth of 2mm, a notch angle of 45°, and a notch root radius of 0.25mm, totaling 60 specimens 4. The optimal implementation method for conducting the test using the device of this invention is as follows: 1. Processing of main components of the device The U-shaped base 2 is in the shape of a right-angled "U". The distance between the two arms of the U is 55.6mm and the width is about 150mm. The middle position of the U-shaped base 2 is designed with a "V" shaped positioning guide rail parallel to the two wings of the U. The guide rail is designed with an angle of 45°±2°, as shown in Figure 2.

[0037] The core of the rectangular frame 3 is rectangular and hollow, with supports on both sides. One end of the support has a countersunk hole, and the other end has a through hole with a notch, as shown in Figure 3.

[0038] One end of the pressure rod 1 is designed with a boss, and the other end is designed as a connecting rod with a handle, the connecting rod also having a boss. One end of the pressure rod 1 can be inserted into the countersunk hole of the rectangular frame 3 support, and the other end is first inserted into the support via the connecting rod and then into the boss.

[0039] 2. Assembly of device components: The U-shaped base 2 is fitted into the rectangular frame 3, and the U-shaped base 2 is fixed by bolts through the horizontal threaded through hole of the rectangular frame 3, so that the whole device can form a solid sample groove.

[0040] Place a qualified sample 4 with the notch facing down into the sample slot. Press in the pressure rod 1, adjust the relative position of the U-shaped base 2 and the rectangular frame 3 so that the lower edge of the pressure rod 1 contacts the sample 4, tighten the bolts, and ensure that the distance from the lower edge of the pressure rod 1 to the cutting edge of the "V"-shaped positioning guide is 8mm, which is the width of the ligament of the sample 4.

[0041] 3. Implementation of impact test specimen testing plan: The test apparatus, adjusted according to the component assembly scheme, was used to test 60 standard impact specimens using both the optimal implementation method of this invention and manual inspection. The detection capabilities and efficiency of the two methods were compared and analyzed, as shown in Table 1.

[0042] Table 1. Comparison of the detection capabilities and detection times for four dimensions of impact specimens between the two methods:

[0043] As can be seen from the above specific embodiments, the failure rates of the two methods for impact specimen 4 are comparable. The detection efficiency of the present invention is significantly higher than that of manual inspection, saving at least twice the time. The rapid size detection method for Charpy impact specimen 4 proposed in this invention can achieve rapid and accurate size detection for specimens 4 with conventional shapes, and has good practicality and promotion value. It can provide strong support for the performance testing of metallic materials and quality control in related industries.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for detecting the size of an impact specimen, characterized in that, The device includes a U-shaped base, a rectangular frame, and a pressure rod. The U-shaped base is a right-angled U-shape, and a V-shaped positioning guide rail is provided in the middle of the U-shaped base. The core of the rectangular frame is hollow, and the U-shaped base is nested inside the rectangular frame and fixed by fixing bolts to form a sample groove. One end of the pressure rod has a boss, and the other end has a connecting rod with a handle. The connecting rod is inserted into the through hole of the support and fixed by the boss. By adjusting the relative position of the U-shaped base and the rectangular frame, the lower edge of the pressure rod contacts the sample, enabling rapid detection of the sample size.

2. The impact specimen size detection device according to claim 1, characterized in that, The V-shaped positioning guide rail of the U-shaped base is matched with the V-shaped notch of the standard impact specimen. The guide rail angle of the V-shaped positioning guide rail is 45°±2°, which is used to guide the placement of the specimen notch.

3. The impact specimen size detection device according to claim 1, characterized in that, The fixing bolts pass through the threaded through holes on the side frame of the rectangular frame to fix the U-shaped base inside the rectangular frame, ensuring the stability of the sample slot. The relative position of the U-shaped base and the rectangular frame can be adjusted by tightening the bolts to adapt to the testing requirements of different samples.

4. The impact specimen size detection device according to claim 1, characterized in that, The distance between the two arms of the U-shaped base matches the length of the standard impact specimen, and the distance between the two arms is 55±0.6mm.

5. The device for detecting the size of impact specimens according to claim 1, characterized in that, The rectangular frame is provided with supports on both sides, with a countersunk hole at one end and a through hole with a notch at the other end.

6. A method for detecting the size of an impact specimen, implemented based on the impact specimen size detection device according to any one of claims 1-5, characterized in that, Includes the following steps: The U-shaped base is nested inside the rectangular frame and fixed with fixing bolts to form a sample groove; Place the impact specimen into the specimen slot with the notch facing down along the V-shaped positioning guide rail; Press in the pressure bar and adjust the relative position of the U-shaped base and the rectangular frame so that the lower edge of the pressure bar contacts the sample; By checking whether the sample can be placed in the sample slot and whether the pressure bar can be pressed in, the length, notch position, and ligament width of the sample can be quickly determined to be qualified.

7. The method for detecting the size of an impact specimen according to claim 6, characterized in that, The notch of the specimen is placed along the V-shaped positioning guide rail of the U-shaped base. If the length dimension of the impact specimen exceeds the positive tolerance or the perpendicularity and parallelism of the specimen end face do not meet the standard requirements, the specimen cannot be placed in the specimen slot and the length dimension of the specimen is unqualified.

8. The method for detecting the size of an impact specimen according to claim 6, characterized in that, If the length of the sample exceeds the negative tolerance when placing the sample, a feeler gauge can be used to verify whether it is qualified.

9. The method for detecting the size of an impact specimen according to claim 6, characterized in that, When placing the sample in the V-shaped positioning guide rail of the sample slot, if the notch position is not centered or not parallel to the end face, the sample cannot be placed in the sample slot and the notch size of the sample is unqualified.

10. The method for detecting the size of an impact specimen according to claim 6, characterized in that, Press in the pressure rod, adjust the relative position of the U-shaped base and the rectangular fixing frame so that the lower edge of the pressure rod contacts the sample, tighten the fixing bolts, and ensure that the distance from the lower edge of the pressure rod to the cutting edge of the V-shaped positioning guide rail is 8 ± 0.075 mm of the sample ligament width. If the sample ligament width is out of tolerance, the guide rod cannot be pressed in, and the sample ligament width dimension is unqualified.

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