A tensile testing machine for automobile copper alloy production and processing

Abstract

This invention discloses a tensile testing machine for automotive copper alloy production and processing, relating to the field of material testing technology. It includes a material storage and loading mechanism comprising a rotating frame, a connecting sleeve, a storage rack, and material clamps. The rotating frame is located on the left side of the tensile testing column. The connecting sleeve is fixed to the left side wall of the tensile testing column and movably sleeved onto one end of the rotating frame. The storage racks are movably sleeved onto the rotating frame. Each storage rack has elastic material clamps at its top and bottom. Through the cooperation of the rotating frame, connecting sleeve, storage rack, and material clamps, this invention can pre-fix multiple copper alloy lead screws to be tested vertically onto the storage rack. During the rotation of the rotating frame, the lead screws automatically enter the upper and lower clamping components, thus eliminating the tedious manual adjustment of the clamping position to ensure the lead screws are vertical, significantly shortening the loading time, and ensuring the stability of the lead screw clamping posture, thereby improving the accuracy of tensile test data.

Description

Technical Field

[0001] This invention relates to the field of materials testing technology, specifically a tensile testing machine for the production and processing of automotive copper alloys. Background Technology

[0002] Brass alloy lead screws are common components in automotive transmission and connection systems, and their mechanical properties directly affect the reliability and safety of the entire vehicle. During the production and processing of brass alloy lead screws, tensile testing is a necessary step to verify their tensile strength, yield strength, and other mechanical properties. Typically, a tensile testing machine is used to apply axial tensile force to the brass alloy lead screw under test, and tensile data is collected in real time to assess whether the material properties meet the usage requirements. With the automotive industry's ever-increasing demands for component quality, the efficiency and accuracy of tensile testing have become increasingly important.

[0003] However, existing tensile testing machines still have many shortcomings in practical use. On the one hand, the loading process of the copper alloy lead screw to be tested relies on repeated manual adjustment of the clamping position, making it difficult to ensure that the lead screw is kept in a vertical position quickly and stably. This not only consumes a lot of loading time, but also affects the accuracy of test data due to clamping posture deviations. On the other hand, removing the copper alloy lead screw after the test is inconvenient, especially for lead screws that have broken after the tensile test, whose upper and lower sections remain in the clamping mechanism and are difficult to remove quickly. These problems make the loading and unloading operations of existing tensile testing machines cumbersome and inefficient, making it difficult to meet the needs of mass production and high-precision testing of automotive copper alloy lead screws. Summary of the Invention

[0004] The purpose of this invention is to provide a tensile testing machine for the production and processing of automotive copper alloys, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tensile testing machine for automotive copper alloy production and processing, comprising a base and a tensile testing column disposed thereon, wherein the tensile testing column is provided with an upper clamping assembly, a lower clamping assembly, and a lead screw lifting assembly, the lower clamping assembly being located below the upper clamping assembly and connected to the lead screw lifting assembly; the upper clamping assembly comprising an upper connecting plate, an upper fixed clamping block, an upper movable clamping block, and an upper fastening handle, the lower clamping assembly comprising a lower connecting plate, a lower fixed clamping block, a lower movable clamping block, and a lower fastening handle, and further comprising: The material storage and feeding mechanism includes a rotating frame, a connecting sleeve, a material storage rack, and a material clamp. The rotating frame is located on the left side of the tensile test column. The connecting sleeve is fixed to the left side wall of the tensile test column and movably sleeved on one end of the rotating frame. The material storage rack is movably sleeved on the rotating frame. Each material storage rack is provided with an elastic material clamp at its top and bottom. The material discharge mechanism includes a rotating rod, a fixed shaft, and a connecting frame. The rotating rods are divided into two groups of two rods each. One group is located at the upper and lower ends of the upper movable clamping block, and the other group is located at the upper and lower ends of the lower movable clamping block. Each fixed shaft passes through the middle of the two rotating rods in the corresponding group to form an I-shaped structure. The connecting frame fixes both ends of each fixed shaft to the corresponding upper or lower connecting plate. When the upper and lower fastening handles are rotated, they respectively contact one end of the rotating rod in the corresponding group and drive the rotating rod to rotate around the fixed shaft.

[0006] Preferably, a control assembly is provided at the top right of the base.

[0007] Preferably, a test groove is provided on the front side of the tensile test column; the upper clamping assembly is fixedly installed at the top of the inner end of the test groove; and the lower clamping assembly is movably installed in the test groove and located below the upper clamping assembly.

[0008] Preferably, the upper clamping assembly includes a fixed block, an upper connecting plate, an upper fixed clamping block, an upper movable clamping block, and an upper fastening handle; the fixed block is fixedly installed at the inner top of the test slide; the upper connecting plate is fixedly installed on the front side of the fixed block; the upper fixed clamping block is fixedly installed on the left side of the bottom front end of the upper connecting plate; the upper movable clamping block is movably installed on the right side of the bottom front end of the upper connecting plate; and the upper fastening handle is movably installed on the right side of the bottom front end of the upper connecting plate.

[0009] Preferably, an upper screw is fixedly provided on the middle left side of the upper fastening handle. The upper screw is movably installed on the right end of the front bottom of the upper connecting plate by means of a thread, and the left end of the upper screw is movably connected to the upper movable clamping block.

[0010] Preferably, the lower clamping assembly includes a lifting slider, a lower connecting plate, a lower fixed clamping block, a lower movable clamping block, and a lower fastening handle; the lifting slider is movably installed in the test slide groove and located below the fixed block, and is connected to the lead screw lifting assembly; the lower connecting plate is fixedly installed on the front side of the lifting slider; the lower fixed clamping block is fixedly installed on the left side of the top front end of the lower connecting plate; the lower movable clamping block is movably located on the right side of the top front end of the lower connecting plate; and the lower fastening handle is movably installed on the right end of the top front end of the lower connecting plate.

[0011] Preferably, a lower screw is fixedly provided at the middle of the left side of the lower fastening throttle, and the lower screw is movably installed at the right end of the front top of the lower connecting plate by means of a thread. The left end of the lower screw is movably connected to the lower movable clamping block; a tension sensor is provided inside the lower clamping assembly.

[0012] Preferably, each of the storage racks is provided with a sliding hole, and the storage rack is movably sleeved on the rotating frame through the sliding hole.

[0013] Preferably, the two fixed shafts are respectively disposed between the upper screw and the upper connecting plate, and between the lower screw and the lower connecting plate.

[0014] Preferably, the upper and lower fastening handles contact the right ends of the corresponding set of rotating rods when they are rotated, so that the rotating rods rotate about the fixed axis and pull out the clamped sample.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention adds a material storage and feeding mechanism to a tensile testing machine. Through the cooperation of a rotating frame, connecting sleeve, material storage rack, and material clamp, multiple copper alloy lead screws to be tested can be pre-fixed vertically on the material storage rack. During the rotation of the rotating frame, the lead screws automatically enter the upper and lower clamping components, thereby eliminating the tedious operation of manually adjusting the clamping position to ensure the lead screws are vertical, significantly shortening the loading time, and ensuring the stability of the lead screw clamping posture, thus improving the accuracy of tensile test data. This invention features a discharge mechanism at the upper and lower clamping components. Utilizing an I-shaped linkage structure formed by a rotating rod triggered by the rotation of the tightening handle and a fixed shaft, the tested copper alloy lead screw is automatically discharged. For an intact lead screw, both ends can be discharged simultaneously; for a broken lead screw, the upper and lower sections can be removed separately. This achieves a fast and convenient discharge operation, effectively improving the overall efficiency of tensile testing. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure is provided for embodiments of the present invention; Figure 2 This is a schematic diagram of the upper clamping component and the lower clamping component provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the material storage and feeding mechanism provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the storage rack structure provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the material discharge mechanism provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the feeding state structure provided in an embodiment of the present invention.

[0017] In the diagram: 1. Base; 2. Control assembly; 301. Tensile test column; 302. Test slide; 303. Upper clamping assembly; 3031. Fixing block; 3032. Upper connecting plate; 3033. Upper fixed clamping block; 3034. Upper movable clamping block; 3035. Upper fastening handle; 304. Lower clamping assembly; 3041. Lifting slider; 3042. Lower connecting plate; 3043. Lower fixed clamping block; 3044. Lower movable clamping block; 3045. Lower fastening handle; 401. Rotating frame; 402. Connecting sleeve; 403. Material storage rack; 404. Material clamp; 405. Sliding hole; 501. Rotating rod; 502. Fixed shaft; 503. Connecting frame. Detailed Implementation

[0018] 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. 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.

[0019] This embodiment describes a tensile testing machine for automotive copper alloy production and processing, such as... Figures 1 to 6 As shown, it includes a base 1, and a control assembly 2 is provided at the top right of the base 1; the tensile test parameters are controlled by the control assembly 2, and the test data is acquired and displayed.

[0020] At other levels, this embodiment also provides a tensile testing mechanism, such as... Figure 1 and Figure 2 As shown, the tensile testing mechanism includes a tensile testing column 301, a testing slide 302, an upper clamping assembly 303, and a lower clamping assembly 304.

[0021] In this embodiment, as Figure 1 As shown, the tensile test column 301 is fixedly installed at the top left of the base 1. The test slide 302 is opened in the middle of the front side of the tensile test column 301. The tensile test column 301 is equipped with a screw lifting assembly. The upper clamping assembly 303 is set at the top of the test slide 302, and the lower clamping assembly 304 is set at the lower middle of the test slide 302. The automotive copper alloy lead screw to be tested is clamped by the upper clamping assembly 303 and the lower clamping assembly 304. Then, the lower clamping assembly 304 is driven to descend along the test slide 302 by the lead screw lifting assembly inside the tensile test column 301 to conduct a tensile test.

[0022] In this embodiment, as Figure 2As shown, the upper clamping assembly 303 includes a fixed block 3031, an upper connecting plate 3032, an upper fixed clamping block 3033, an upper movable clamping block 3034, and an upper fastening handle 3035. The fixed block 3031 is fixedly installed inside the top of the test slide 302. The upper connecting plate 3032 is fixedly installed on the front side of the fixed block 3031. The upper fixed clamping block 3033 is fixedly installed on the left side of the bottom front side of the upper connecting plate 3032. The upper movable clamping block 3034 is movably installed on the right side of the bottom front side of the upper connecting plate 3032. The upper fastening handle 3035 is movably installed on the right side of the bottom front side of the upper connecting plate 3032. An upper screw is fixedly installed in the middle of the left side of the upper fastening handle 3035. The upper screw is movably installed on the right side of the bottom front side of the upper connecting plate 3032 by thread. The left end of the upper screw is movably connected to the upper movable clamping block 3034. By rotating the upper fastening handle 3035 upwards, the upper screw connected to it is driven to rotate, causing the upper movable clamping block 3034 to move away from the upper fixed clamping block 3033 along with the upper screw and the upper fastening handle 3035. This gradually increases the distance between the upper fixed clamping block 3033 and the upper movable clamping block 3034, so that the copper alloy lead screw to be tested can be placed in. After the copper alloy lead screw is placed in, the upper fastening handle 3035 is rotated downwards, causing the upper movable clamping block 3034 to move upwards to the upper fixed clamping block 3033 to stably clamp the copper alloy lead screw.

[0023] In this embodiment, as Figure 2 As shown, the lower clamping assembly 304 includes a lifting slider 3041, a lower connecting plate 3042, a lower fixed clamping block 3043, a lower movable clamping block 3044, and a lower fastening handle 3045. The lifting slider 3041 is movably installed inside the test slide 302 and is located below the fixed block 3031. The lifting slider 3041 is connected to the screw lifting assembly inside the tensile test column 301. The lower connecting plate 3042 is fixedly installed on the front side of the lifting slider 3041, and the lower fixed clamping block 3043 is fixedly installed on the lower... The lower movable clamping block 3044 is movably positioned to the right of the front top of the lower connecting plate 3042, slightly to the left of the top front of the connecting plate 3042. The lower fastening handle 3045 is movably mounted on the right end of the front top of the lower connecting plate 3042. A lower screw is fixedly installed in the middle of the left side of the lower fastening handle 3045. The lower screw is movably mounted on the right end of the front top of the lower connecting plate 3042 via a thread. The left end of the lower screw is movably connected to the lower movable clamping block 3044. A tension sensor is provided inside the lower clamping assembly 304. By rotating the lower fastening handle 3045 upwards, the lower screw connected to it is rotated, causing the lower movable clamping block 3044 to move away from the lower fixed clamping block 3043 along with the lower screw and the lower fastening handle 3045. This gradually increases the distance between the lower fixed clamping block 3043 and the lower movable clamping block 3044, so that the copper alloy lead screw of the car to be tested can be placed in. After the copper alloy lead screw is placed in, the lower fastening handle 3045 is rotated downwards, causing the lower movable clamping block 3044 to move downwards to the lower fixed clamping block 3043 to stably clamp the copper alloy lead screw. The upper end of the automotive copper alloy lead screw to be tested is clamped by the upper fixed clamping block 3033 and the upper movable clamping block 3034, and the lower end of the automotive copper alloy lead screw to be tested is clamped by the lower fixed clamping block 3043 and the lower movable clamping block 3044. After setting the parameters by the control assembly 2, the lead screw lifting assembly inside the tensile test column 301 drives the lifting slider 3041 to descend, so as to drive the lower clamping assembly 304 to descend along the test slide 302 to increase the distance between the upper clamping assembly 303 and the lower clamping assembly 304, thereby continuously increasing the tensile force applied to the copper alloy lead screw. The tensile force data is obtained by the tensile force sensor provided in the lower clamping assembly 304, and is processed and displayed in real time by the control assembly 2.

[0024] At other levels, this embodiment also provides a material storage and feeding mechanism, such as... Figure 1 , Figure 3 and Figure 4 As shown, the material storage and feeding mechanism includes a rotating frame 401, a connecting sleeve 402, a material storage rack 403, a material clamp 404, and a sliding hole 405.

[0025] In this embodiment, as Figure 3 and Figure 6 As shown, the rotating frame 401 is located on the left side of the tensile test column 301, the connecting sleeve 402 is movably sleeved on one end of the rotating frame 401 near the tensile test column 301, the connecting sleeve 402 is fixedly installed on the left side wall of the tensile test column 301, and there are several storage racks 403, all of which are movably sleeved on the rotating frame 401. The tensile test column 301 and the rotating frame 401 are connected by the connecting sleeve 402, so that the rotating frame 401 can rotate on the left side of the tensile test column 301. When the rotating frame 401 is rotated in the direction of the control assembly 2 to be parallel to the front side of the tensile test column 301, the storage rack 403 can be moved to the test slide 302.

[0026] In this embodiment, as Figure 4 As shown, there are two material clamps 404 on each storage rack 403, and they are fixedly installed at the top and bottom of the storage rack 403 respectively. The material clamps 404 are made of elastic material. There are three sliding holes 405 on each storage rack 403. The storage rack 403 is sleeved on the rotating frame 401 through the sliding holes 405. By inserting both ends of the automotive copper alloy lead screw to be tested into the clamps 404 at both ends of each storage rack 403, the copper alloy lead screw is fixed in position on the storage rack 403 and kept vertical. By loading multiple storage racks 403 containing the copper alloy lead screws to be tested onto the rotating frame 401, it is possible to quickly load materials during tensile testing. During loading, as the rotating frame 401 is rotated towards the front of the tensile test column 301 from the control assembly 2, the outermost storage rack 403 is aligned with the upper clamping assembly 303 and the lower clamping assembly 304, allowing the copper alloy lead screw to automatically enter the upper clamping assembly 303 and the lower clamping assembly 304. After placement, the upper clamping assembly 403 is rotated... After tightening the upper and lower tightening handles 3035 and 3045, the copper alloy lead screw can be quickly clamped. At this time, the material clamp 404 has not yet separated from the copper alloy lead screw. Afterwards, simply rotate the rotating frame 401 in the opposite direction to automatically separate the material clamp 404 from the copper alloy lead screw. Then, remove the empty storage rack 403 from the rotating frame 401. After placing the copper alloy lead screw for the tensile test through the above process, the lead screw remains vertical, saving the process of repeatedly adjusting the clamping position to keep the copper alloy lead screw vertical during manual clamping. The quick loading of the copper alloy lead screw through the storage and feeding mechanism saves the loading time during the test and improves the accuracy of the test data.

[0027] At other levels, this embodiment also provides a discharge mechanism, such as Figure 5 As shown, there are two discharge mechanisms, which are respectively located at the upper clamping assembly 303 and the lower clamping assembly 304. The discharge mechanism includes a rotating rod 501, a fixed shaft 502 and a connecting frame 503.

[0028] In this embodiment, as Figure 5 As shown, each set of rotating rods 501 has two rods. The two sets of rotating rods 501 are respectively set at the upper and lower ends of the upper movable clamping block 3034 and the lower movable clamping block 3044. Two fixed shafts 502 are respectively set between the upper screw and the upper connecting plate 3032 and between the lower screw and the lower connecting plate 3042. The two fixed shafts 502 pass through the middle of each rotating rod 501 and form an I-shaped structure with the two sets of rotating rods 501. The fixed shafts 502 are movably connected to the rotating rods 501. There are two sets of connecting frames 503, which are respectively fixedly installed at both ends of each fixed shaft 502 and respectively fixedly connected to the upper connecting plate 3032 and the lower connecting plate 3042. By rotating the upper fastening handle 3035 upwards, the distance between the upper movable clamping block 3034 and the upper fixed clamping block 3033 increases, facilitating the removal of the copper alloy lead screw. When the upper fastening handle 3035 is rotated upwards, it contacts the right end of the rotating rod 501, causing the rotating rod 501 to rotate about the fixed shaft 502. The right end of the rotating rod 501 rotates towards the tensile test column 301, while the left end rotates away from the tensile test column 301, allowing the upper fixed clamping block 3033 and the upper movable clamping block 3034 to clamp together for tensile testing. The copper alloy lead screw is simultaneously pulled out by the upper and lower rotating rods 501 for quick unloading. The copper alloy lead screw between the lower fixed clamping block 3043 and the lower movable clamping block 3044 can also be pulled out by rotating the lower fastening handle 3045 upwards. For copper alloy lead screws that have not broken after tensile testing, the upper fastening handle 3035 and the lower fastening handle 3045 can be rotated simultaneously to remove the entire copper alloy lead screw. For broken copper alloy lead screws, the upper fastening handle 3035 and the lower fastening handle 3045 can be rotated separately to remove the upper and lower sections of the copper alloy lead screw respectively.

[0029] Working principle: When using this invention, the two ends of the automotive copper alloy lead screw to be tested are first inserted into the material clamps 404 at the top and bottom of each storage rack 403, respectively. The material clamps 404 are made of elastic material and have elasticity, which can stably fix the copper alloy lead screw on the storage rack 403 and keep it in a vertical state. Then, multiple storage racks 403 containing the copper alloy lead screw to be tested are sequentially connected to the rotating frame 401 through the sliding holes 405, thereby completing the batch loading preparation. Subsequently, the rotating frame 401 is rotated towards the control assembly 2 via the connecting sleeve 402, making the rotating frame 401 parallel to the front side of the tensile test column 301, and aligning the outermost storage rack 403 with the upper clamping assembly 303 and the lower clamping assembly 304, so that the copper alloy lead screw automatically enters the upper clamping assembly 303 and the lower clamping assembly 304; then, the upper fastening handle 3035 and the lower fastening handle 3045 are rotated respectively, driving the upper screw and the lower screw to rotate, so that the upper movable clamping block 3034 moves upward to the fixed clamping block 3033 and the lower movable clamping block 3044 moves downward to the fixed clamping block 3043, clamping the upper and lower ends of the copper alloy lead screw. At this time, the material clamp 404 has not yet separated from the copper alloy lead screw. Rotating the rotating frame 401 in the opposite direction will automatically separate the material clamp 404 from the copper alloy lead screw, and then the empty storage rack 403 is removed, thus completing the loading process.

[0030] After the copper alloy lead screw is clamped and stabilized, the test parameters are set by the control assembly 2. The lead screw lifting assembly inside the tensile test column 301 drives the lifting slider 3041 to descend along the test slide 302, which in turn moves the lower clamping assembly 304 downward as a whole, so that the distance between the upper clamping assembly 303 and the lower clamping assembly 304 continuously increases, thereby applying axial tensile force to the copper alloy lead screw. At the same time, the tensile sensor installed in the lower clamping assembly 304 collects tensile force data in real time, which is processed and displayed in real time by the control assembly 2, thereby obtaining the tensile strength, yield strength and other mechanical performance indicators of the copper alloy lead screw.

[0031] After the tensile test is completed, rotate the upper fastening handle 3035 or the lower fastening handle 3045 upwards. On the one hand, this increases the distance between the upper movable clamping block 3034 and the upper fixed clamping block 3033, and the distance between the lower movable clamping block 3044 and the lower fixed clamping block 3043, thereby loosening the sample. On the other hand, during the rotation, the fastening handle contacts the right end of the corresponding set of rotating rods 501, causing the rotating rods 501 to rotate about the fixed shaft 502. That is, the right end of the rotating rods 501 rotates towards the tensile test column 301, and the left end rotates away from the tensile test column 301. The copper alloy lead screw clamped by the I-shaped structure formed by the upper and lower rotating rods 501 and the fixed shaft 502 is pulled out simultaneously. For a complete lead screw that has not broken, the upper and lower fastening handles 3035 and 3045 can be rotated simultaneously to remove it in one go. For a broken lead screw, the upper and lower sections can be removed separately by rotating the upper and lower fastening handles 3035 and 3045 respectively. In this way, the batch vertical pre-storage and rapid alignment clamping of copper alloy lead screws are realized through the material storage and feeding mechanism. The lower clamping component 304 is driven to rise and fall by the lead screw lifting assembly to apply tension, and the tension sensor collects the data. The automatic material feeding is realized through the linkage of the I-shaped structure formed by the fastening handle, rotating rod 501, and fixed shaft 502 in the material feeding mechanism. This improves the efficiency and data accuracy of the tensile test of automotive copper alloy lead screws.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tensile testing machine for automotive copper alloy production and processing, comprising a base (1) and a tensile testing column (301) disposed thereon, wherein the tensile testing column (301) is provided with an upper clamping assembly (303), a lower clamping assembly (304) and a lead screw lifting assembly, wherein the lower clamping assembly (304) is located below the upper clamping assembly (303) and connected to the lead screw lifting assembly; the upper clamping assembly (303) comprises an upper connecting plate (3032), an upper fixed clamping block (3033), an upper movable clamping block (3034) and an upper fastening handle (3035), and the lower clamping assembly (304) comprises a lower connecting plate (3042), a lower fixed clamping block (3043), a lower movable clamping block (3044) and a lower fastening handle (3045), characterized in that, Also includes: The material storage and feeding mechanism includes a rotating frame (401), a connecting sleeve (402), a material storage rack (403), and a material clamp (404). The rotating frame (401) is located on the left side of the tensile test column (301). The connecting sleeve (402) is fixed to the left side wall of the tensile test column (301) and movably sleeved on one end of the rotating frame (401). The material storage rack (403) is movably sleeved on the rotating frame (401). Each material storage rack (403) is provided with an elastic material clamp (404) at its top and bottom. The material discharge mechanism includes a rotating rod (501), a fixed shaft (502), and a connecting frame (503). The rotating rod (501) is divided into two groups of two rods each. One group is located at the upper and lower ends of the upper movable clamping block (3034), and the other group is located at the upper and lower ends of the lower movable clamping block (3044). Each fixed shaft (502) passes through the middle of the two rotating rods (501) of the corresponding group to form an I-shaped structure. The connecting frame (503) fixes both ends of each fixed shaft (502) to the corresponding upper connecting plate (3032) or lower connecting plate (3042). When the upper fastening handle (3035) and the lower fastening handle (3045) rotate, they respectively contact one end of the rotating rod (501) of the corresponding group and drive the rotating rod (501) to rotate around the fixed shaft (502).

2. The tensile testing machine for automotive copper alloy production and processing according to claim 1, characterized in that: The control assembly (2) is located at the top right of the base (1).

3. The tensile testing machine for automotive copper alloy production and processing according to claim 1, characterized in that: The front side of the tensile test column (301) is provided with a test groove (302); the upper clamping assembly (303) is fixedly installed at the top of the inside of the test groove (302); the lower clamping assembly (304) is movably installed in the test groove (302) and located below the upper clamping assembly (303).

4. A tensile testing machine for automotive copper alloy production and processing according to claim 3, characterized in that: The upper clamping assembly (303) includes a fixed block (3031), an upper connecting plate (3032), an upper fixed clamping block (3033), an upper movable clamping block (3034), and an upper fastening handle (3035); the fixed block (3031) is fixedly installed at the top of the inside of the test slide (302); the upper connecting plate (3032) is fixedly installed on the front side of the fixed block (3031); the upper fixed clamping block (3033) is fixedly installed on the left side of the bottom front side of the upper connecting plate (3032); the upper movable clamping block (3034) is movably disposed on the right side of the bottom front side of the upper connecting plate (3032); and the upper fastening handle (3035) is movably installed on the right side of the bottom front side of the upper connecting plate (3032).

5. A tensile testing machine for automotive copper alloy production and processing according to claim 4, characterized in that: An upper screw is fixedly installed in the middle of the left side of the upper fastening handle (3035). The upper screw is movably installed on the right end of the front bottom of the upper connecting plate (3032) by means of a thread. The left end of the upper screw is movably connected to the upper movable clamping block (3034).

6. A tensile testing machine for automotive copper alloy production and processing according to claim 3, characterized in that: The lower clamping assembly (304) includes a lifting slider (3041), a lower connecting plate (3042), a lower fixed clamping block (3043), a lower movable clamping block (3044), and a lower fastening handle (3045). The lifting slider (3041) is movably installed in the test slide (302) and located below the fixed block (3031), and is connected to the lead screw lifting assembly. The lower connecting plate (3042) is fixedly installed on the front side of the lifting slider (3041). The lower fixed clamping block (3043) is fixedly installed on the left side of the top front end of the lower connecting plate (3042). The lower movable clamping block (3044) is movably installed on the right side of the top front end of the lower connecting plate (3042). The lower fastening handle (3045) is movably installed on the right side of the top front end of the lower connecting plate (3042).

7. A tensile testing machine for automotive copper alloy production and processing according to claim 6, characterized in that: A lower screw is fixedly installed in the middle of the left side of the lower fastening handle (3045). The lower screw is movably installed on the right end of the front top of the lower connecting plate (3042) by thread. The left end of the lower screw is movably connected to the lower movable clamping block (3044). A tension sensor is provided inside the lower clamping assembly (304).

8. A tensile testing machine for automotive copper alloy production and processing according to claim 1, characterized in that: Each of the storage racks (403) has a sliding hole (405), and the storage rack (403) is movably sleeved on the rotating frame (401) through the sliding hole (405).

9. A tensile testing machine for automotive copper alloy production and processing according to claim 1, characterized in that: The two fixed shafts (502) are respectively disposed between the upper screw and the upper connecting plate (3032) and between the lower screw and the lower connecting plate (3042).

10. A tensile testing machine for automobile copper alloy production and processing according to claim 9, characterized in that: When the upper fastening handle (3035) and the lower fastening handle (3045) are rotated, they respectively contact the right end of the corresponding set of rotating rods (501) so that the rotating rods (501) rotate about the fixed shaft (502) and pull out the clamped sample.

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