Yield strength testing machine and method based on aluminum shell of electronic product

Abstract

The invention relates to the technical field of yield strength testing, in particular to a yield strength testing machine and method based on an electronic product aluminum shell. Comprising a testing machine chuck, a bevel edge clamp used for clamping and positioning a test piece, an adjusting unit used for adjusting the clamping tightness of the bevel edge clamp and a connecting piece used for being connected with a testing machine, one end of the testing machine chuck is fixedly connected with the connecting piece, and the bevel edge clamp is installed in the other end of the testing machine chuck through the adjusting unit. A center calibration unit is placed between the bevel edge clamps; the center calibration unit comprises two end positioning assemblies used for positioning the end of the test piece and two clamping assemblies. In the test process, the test piece is firstly aligned with the center calibration unit, and then the side tooth groove is formed in the inner side of the bevel edge clamp, so that inclination is prevented in the process that the center calibration unit is connected with the bevel edge clamp, and the accuracy of a test result is further improved.

Description

Technical Field

[0001] This invention relates to a yield strength testing machine and method for aluminum casings of electronic products, and particularly to a yield strength testing machine and method for aluminum casings of electronic products, belonging to the field of yield strength testing technology. Background Technology

[0002] The equipment used for testing the yield strength of aluminum casings for electronic products is a microcomputer-controlled electronic universal testing machine. This equipment uses precision clamps to hold a standard "dumbbell" shaped specimen cut from the casing and applies an axial tensile load at a constant rate. The core of the test is the extensometer, which is in close contact with the surface of the specimen. It can accurately measure micron-level deformation in real time and automatically plot the stress-strain curve. For aluminum alloy materials without a clear yield plateau, the system automatically calculates and reports its key indicator—the specified plastic elongation strength (Rp0.2), which is the stress value when 0.2% plastic deformation occurs, according to national standards (such as GB / T). This allows for an accurate assessment of the shell material's ability to resist permanent deformation, providing core data support for product structural design and quality control. If the test piece is tilted during the testing process, it will cause errors between the test results and the actual situation, resulting in inaccurate test results. Therefore, it is urgent to improve the yield strength testing machine and method based on the aluminum shell of electronic products to solve the above-mentioned problems. Summary of the Invention

[0003] The purpose of this invention is to provide a yield strength testing machine and method for aluminum casings of electronic products, in order to solve the problem that if the test piece is tilted during the testing process, it will cause errors between the test results and the actual situation, resulting in inaccurate test results.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A yield strength testing machine and method for aluminum casings of electronic products includes a testing machine chuck, a beveled clamp for clamping and positioning the test piece, an adjustment unit for adjusting the clamping tightness of the beveled clamp, and a connector for connecting to the testing machine. One end of the testing machine chuck is fixedly connected to the connector, and the other end of the testing machine chuck is internally fitted with the beveled clamp via the adjustment unit. A center calibration unit is placed between the beveled clamps. The center calibration unit includes two end positioning components for positioning the end of the test piece and two clamping components. The end positioning components are connected by a guide component, and the end positioning components and clamping components are rotatably connected. The test piece is disposed on one side of the guide component.

[0005] Preferably, the end positioning component includes a positioning plate, and a T-shaped positioning groove is provided at one end of the positioning plate near the test piece. The positioning groove is equipped with a pad to prevent damage to the test piece caused by excessive clamping force and an anti-slip pad. A first connecting groove and a second connecting groove are respectively provided on the upper and lower ends of the positioning plate. A reset spring is fixedly connected to the bottom end of both the first connecting groove and the second connecting groove.

[0006] Preferably, the pad includes a T-shaped plate with multiple anti-slip holes inside, and the T-shaped plate is made of alloy material.

[0007] Preferably, the upper and lower ends of the second connecting groove opening are both arc-shaped, and the thickness of the pad is half the depth of the positioning groove.

[0008] Preferably, the clamping assembly includes a rotating plate, a pad is fixedly connected to the middle of one end of the rotating plate near the test piece, a connecting block and a positioning pin adapted to the first connecting groove and the second connecting groove are fixedly connected to the end of the rotating plate with the pad, and a through-rotating shaft is fixedly connected to the connecting block inside one end of the rotating plate.

[0009] Preferably, the edge of the positioning pin away from the rotating plate is arc-shaped, the other end of the connecting block is slidably connected to the inside of the positioning plate through the first connecting groove, and the connecting block is fixedly connected to the reset spring installed inside the first connecting groove. A magnetic block is installed inside the arc-shaped end of the positioning pin.

[0010] Preferably, the guiding assembly includes a first guide plate, the first guide plate having a guide groove inside, a sliding assembly slidably connected inside the guide groove, the sliding assembly being fixedly connected to both sides of a second guide plate, and a slot being provided at one end of the first guide plate and the second guide plate near the end positioning assembly for facilitating the installation of a metal extensometer during testing.

[0011] Preferably, the lateral projection of the first guide plate is U-shaped, the lateral projection of the second guide plate is T-shaped, and one end of the second guide plate is disposed inside the first guide plate.

[0012] Preferably, the sliding assembly includes a slider fixedly connected to the second guide plate, and the slider has balls rotatably connected to both sides for contacting the inner wall of the guide groove. At least two sliders are provided on either side of the first guide plate.

[0013] Preferably, it includes the following steps: Step 1: Install the test machine chuck onto the test machine. After installation, install the test piece onto one side of the center calibration unit. Step 2: The test piece is fixed by connecting both ends of the test piece to the end positioning components and clamping components; During the fixing process, the test piece is installed inside the positioning groove, and the rotating plate is connected to the positioning plate by rotating. During the connection process, the positioning pin enters the second connecting groove and is magnetically fixed with the return spring. Step 3: During the fixing process, the guide component automatically adjusts and adapts to the length of the test piece; Step 4: After the test piece is connected to the test machine chuck, install the two ends of the center calibration unit at the ends of the two test machine chucks respectively. After installation, control the inclined clamp to clamp the two ends of the center calibration unit through the adjustment unit. During the clamping process, the rotating plate moves towards the positioning plate to further clamp and fix the test piece. During the fixing process, the slots on the outer side of the positioning plate and the rotating plate are matched with the slots inside the inclined clamp and automatically adjusted. Step 5: After the overall fixation is completed, fix and connect the metal extensometer to both ends of the test piece through the slot; Step 6: Power on the testing machine and control its operation to test the test piece. During the test, analyze the test records to obtain the yield strength test results.

[0014] The present invention has at least the following beneficial effects: 1. In this invention, by setting a central calibration unit, during the testing process, the test piece is first aligned with the central calibration unit, and then a side tooth groove is opened on the inner side of the inclined clamp to prevent tilting during the connection between the central calibration unit and the inclined clamp, thereby further improving the accuracy of the test results. 2. In this invention, the positioning groove can automatically align the central calibration unit with the test piece during the connection process. The pad can prevent damage to the test piece. The reset spring and connecting block can allow the rotating plate to move laterally during rotation. 3. In this invention, the guide component can help the test piece be placed correctly. At the same time, during the test, the ball bearings can effectively reduce the internal movement of the guide component, which may affect the test results. In addition, the slot can facilitate the installation of the metal extensometer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the central calibration unit structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the end positioning component structure of the present invention; Figure 5 This is a schematic diagram of the installation position of the return spring in this invention; Figure 6 This is a schematic diagram of the reset spring structure of the present invention; Figure 7 This is a schematic diagram of the guiding component structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 9 For the present invention Figure 7 Enlarged structural diagram at point C.

[0016] In the diagram, 1. Testing machine chuck; 2. Angled clamp; 3. Central calibration unit; 31. End positioning assembly; 311. Positioning plate; 312. First connecting groove; 313. Second connecting groove; 314. Return spring; 315. Pad; 3151. T-shaped plate; 3152. Anti-slip hole; 316. Positioning groove; 32. Clamping assembly; 321. Rotating plate; 322. Locating pin; 323. Connecting block; 324. Rotating shaft; 33. Guide assembly; 331. First guide plate; 332. Guide groove; 333. Slot; 334. Second guide plate; 335. Sliding assembly; 3351. Slider; 3352. Ball bearing; 4. Connecting parts; 5. Adjustment unit; 6. Test piece. Detailed Implementation

[0017] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0018] like Figures 1-9 As shown, the yield strength testing machine and method based on the aluminum casing of electronic products provided in this embodiment includes a testing machine chuck 1, a beveled clamp 2 for clamping and positioning the test piece 6, an adjustment unit 5 for adjusting the clamping tightness of the beveled clamp 2, and a connector 4 for connecting to the testing machine. One end of the testing machine chuck 1 is fixedly connected to the connector 4, and the beveled clamp 2 is installed inside the other end of the testing machine chuck 1 through the adjustment unit 5. A center calibration unit 3 is placed between the beveled clamps 2. The center calibration unit 3 includes two end positioning components 31 for positioning the end of the test piece 6 and two clamping components 32. The end positioning components 31 are connected by a guide component 33, and the end positioning components 31 and the clamping components 32 are rotatably connected. The test piece 6 is placed on one side of the guide component 33.

[0019] As a further embodiment of the present invention, the end positioning component 31 includes a positioning plate 311. A T-shaped positioning groove 316 is formed at one end of the positioning plate 311 near the test piece 6. A non-slip pad 315 is installed inside the positioning groove 316 to prevent damage to the test piece 6 from excessive clamping force. A first connecting groove 312 and a second connecting groove 313 are respectively formed on the upper and lower sides of the positioning plate 311. A return spring 314 is fixedly connected to the bottom of both the first connecting groove 312 and the second connecting groove 313. The pad 315 includes a T-shaped plate body 31. 51. The T-shaped plate 3151 has multiple anti-slip holes 3152 inside. The T-shaped plate 3151 is made of alloy material. The upper and lower ends of the opening of the second connecting groove 313 are arc-shaped. The thickness of the pad 315 is half the depth of the positioning groove 316. Through the end positioning component 31 set above, the test piece 6 can be stably positioned. At the same time, the toothed groove on one side of the positioning plate 311 cooperates with the toothed groove of the inclined clamp 2, which can effectively avoid the problem of tilting after the positioning plate 311 is placed, and further improve the stability of the test piece 6 during the test. As a further embodiment of the present invention, the clamping assembly 32 includes a rotating plate 321. A pad 315 is fixedly connected to the middle of one end of the rotating plate 321 near the test piece 6. A connecting block 323 and a positioning pin 322, which are adapted to the first connecting groove 312 and the second connecting groove 313, are fixedly connected to one end of the rotating plate 321. A through-rotating shaft 324 is fixedly connected to the connecting block 323 inside one end of the rotating plate 321. The edge of the positioning pin 322 away from the rotating plate 321 is arc-shaped. The other end of the connecting block 323 is slidably connected to the positioning plate 311 through the first connecting groove 312. The connecting block 323 is fixedly connected to the reset spring 314 installed inside the first connecting groove 312. A magnetic block is installed inside the arc-shaped end of the positioning pin 322. Through the clamping assembly 32 configured above, the test piece 6 can be further clamped to ensure stability during the test. At the same time, the pad 315 can disperse the pressure and prevent damage to the test piece 6. As a further embodiment of the present invention, the guide component 33 includes a first guide plate 331, a guide groove 332 is provided inside the first guide plate 331, a sliding component 335 is slidably connected inside the guide groove 332, the sliding component 335 is fixedly connected to both sides of the second guide plate 334, and a slit groove 333 is provided at one end of the first guide plate 331 and the second guide plate 334 near the end positioning component 31 for facilitating the installation of a metal extensometer during the test. With the above configuration, test pieces 6 of different lengths can be tested. As a further embodiment of the present invention, the first guide plate 331 has a U-shaped lateral projection, the second guide plate 334 has a T-shaped lateral projection, and one end of the second guide plate 334 is disposed inside the first guide plate 331. Through the above arrangement, the stability of the guide assembly 33 during operation can be guaranteed. As a further embodiment of the present invention, the sliding component 335 includes a slider 3351 fixedly connected to the second guide plate 334. Both sides of the slider 3351 are rotatably connected with ball bearings 3352 for contacting the inner wall of the guide groove 332. At least two sliders 3351 are provided on either side of the first guide plate 331. Through the above arrangement, the smoothness of the movement of the second guide plate 334 can be further improved, and the accuracy of the test results can be avoided.

[0020] like Figures 1-9 As shown in this embodiment, the principle of the yield strength testing machine and method based on the aluminum casing of electronic products is as follows: Includes the following steps: Step 1: Install the test machine chuck 1 on the test machine. After installation, install the test piece 6 on one side of the center calibration unit 3. Step 2: The test piece 6 is fixed by connecting both ends of the test piece 6 to the end positioning component 31 and the clamping component 32; During the fixing process, the test piece 6 is installed inside the positioning groove 316, and the rotating plate 321 is rotated to connect with the positioning plate 311. During the connection process, the positioning pin 322 enters the second connecting groove 313 and is magnetically fixed with the return spring 314. Step 3: During the fixing process, the guide component 33 automatically adjusts and adapts to the length of the test piece 6; Step 4: After the test piece 6 is connected to the test machine chuck 1, install the two ends of the center calibration unit 3 at the ends of the two test machine chucks 1 respectively. After installation, control the inclined clamp 2 to clamp the two ends of the center calibration unit 3 through the adjustment unit 5. During the clamping process, the rotating plate 321 moves towards the positioning plate 311 to further clamp and fix the test piece 6. During the fixing process, the slots on the outer side of the positioning plate 311 and the rotating plate 321 are matched with the internal slots of the inclined clamp 2 and automatically adjusted. Step 5: After the overall fixation is completed, fix and connect the metal extensometer to both ends of the test piece 6 through the slot 333; Step 6: Power on the testing machine and control its operation to test test piece 6. During the test, analyze the test records to obtain the yield strength test results.

[0021] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0022] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0023] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A yield strength testing machine and method for aluminum casings of electronic products, comprising a testing machine chuck (1), a beveled clamp (2) for clamping and positioning a test piece (6), an adjustment unit (5) for adjusting the clamping tightness of the beveled clamp (2), and a connector (4) for connecting to the testing machine, characterized in that: One end of the test machine chuck (1) is fixedly connected to a connector (4), and the other end of the test machine chuck (1) is equipped with a bevel clamp (2) through an adjustment unit (5). A center calibration unit (3) is placed between the bevel clamps (2). The central calibration unit (3) includes two end positioning components (31) for positioning the end of the test piece (6) and two clamping components (32). The end positioning components (31) are connected to each other through a guide component (33). The end positioning components (31) and the clamping components (32) are rotatably connected. The test piece (6) is disposed on one side of the guide component (33).

2. The yield strength testing machine and method for aluminum casings of electronic products according to claim 1, characterized in that: The end positioning component (31) includes a positioning plate (311). The positioning plate (311) has a T-shaped positioning groove (316) at one end near the test piece (6). The positioning groove (316) is equipped with a non-slip pad (315) to prevent damage to the test piece (6) by excessive clamping force. The positioning plate (311) has a first connecting groove (312) and a second connecting groove (313) on its upper and lower sides, respectively. The bottom of the first connecting groove (312) and the second connecting groove (313) are fixedly connected with a return spring (314).

3. The yield strength testing machine and method for aluminum casings of electronic products according to claim 2, characterized in that: The pad (315) includes a T-shaped plate (3151), and the T-shaped plate (3151) has multiple anti-slip holes (3152) inside. The T-shaped plate (3151) is made of alloy material.

4. The yield strength testing machine and method for aluminum casings of electronic products according to claim 2, characterized in that: The upper and lower ends of the opening of the second connecting groove (313) are both arc-shaped, and the thickness of the pad (315) is half the depth of the positioning groove (316).

5. The yield strength testing machine and method for aluminum casings of electronic products according to claim 1, characterized in that: The clamping assembly (32) includes a rotating plate (321). A pad (315) is fixedly connected to the middle of one end of the rotating plate (321) near the test piece (6). A connecting block (323) and a positioning pin (322) that are adapted to the first connecting groove (312) and the second connecting groove (313) are fixedly connected to one end of the rotating plate (321). A through-hole rotating shaft (324) is fixedly connected to the connecting block (323) inside one end of the rotating plate (321).

6. The yield strength testing machine and method for aluminum casings of electronic products according to claim 5, characterized in that: The positioning pin (322) has an arc-shaped edge at one end away from the rotating plate (321). The other end of the connecting block (323) is slidably connected to the inside of the positioning plate (311) through the first connecting groove (312). The connecting block (323) is fixedly connected to the reset spring (314) installed inside the first connecting groove (312). A magnetic block is installed inside the arc-shaped end of the positioning pin (322).

7. The yield strength testing machine and method for aluminum casings of electronic products according to claim 1, characterized in that: The guide assembly (33) includes a first guide plate (331), a guide groove (332) is provided inside the first guide plate (331), a sliding assembly (335) is slidably connected inside the guide groove (332), the sliding assembly (335) is fixedly connected to both sides of the second guide plate (334), and a slit groove (333) is provided at one end of the first guide plate (331) and the second guide plate (334) near the end positioning assembly (31) for facilitating the installation of the metal extensometer during the test.

8. The yield strength testing machine and method for aluminum casings of electronic products according to claim 7, characterized in that: The first guide plate (331) has a U-shaped lateral projection, and the second guide plate (334) has a T-shaped lateral projection. One end of the second guide plate (334) is located inside the first guide plate (331).

9. The yield strength testing machine and method for aluminum casings of electronic products according to claim 7, characterized in that: The sliding assembly (335) includes a slider (3351) fixedly connected to the second guide plate (334). Both sides of the slider (3351) are rotatably connected with ball bearings (3352) for contacting the inner wall of the guide groove (332). There are at least two sliders (3351) provided on either side of the first guide plate (331).

10. The yield strength testing machine and method for aluminum casings of electronic products according to any one of claims 1-9, characterized in that: Includes the following steps: Step 1: Install the test machine chuck (1) on the test machine. After installation, install the test piece (6) on one side of the center calibration unit (3). Step 2: The test piece (6) is fixed by connecting both ends of the test piece (6) to the end positioning component (31) and the clamping component (32); During the fixing process, the test piece (6) is installed inside the positioning groove (316), and the rotating plate (321) is rotated to connect with the positioning plate (311). During the connection process, the positioning pin (322) enters the second connecting groove (313) and is magnetically fixed with the reset spring (314). Step 3: During the fixing process, the guide component (33) automatically adjusts and adapts to the length of the test piece (6); Step 4: After the test piece (6) is connected to the test machine chuck (1), the two ends of the center calibration unit (3) are installed at the ends of the two test machine chucks (1). After installation, the inclined clamp (2) is controlled by the adjustment unit (5) to clamp the two ends of the center calibration unit (3). During the clamping process, the rotating plate (321) moves towards the positioning plate (311) to further clamp and fix the test piece (6). During the fixing process, the slots opened on the outside of the positioning plate (311) and the rotating plate (321) are matched with the slots inside the inclined clamp (2) and automatically adjusted. Step 5: After the overall fixation is completed, fix and connect the metal extensometer to both ends of the test piece (6) through the slot (333); Step 6: Power on the testing machine and control its operation to test the test piece (6). During the test, analyze the test records to obtain the yield strength test results.

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