Magnesium alloy extrusion test system

Abstract

The invention relates to the technical field of magnesium alloy extrusion tests, in particular to a magnesium alloy extrusion test system which comprises a top plate and a bottom plate, the four corners of the inner sides of the top plate and the bottom plate are fixedly connected through stand columns, the four corners of the outer wall of the bottom plate are fixedly connected with electric push rods through supporting frames, and the tail ends of output shafts of the electric push rods are fixedly connected with push plates. A power assembly is installed on the inner wall of the upper portion of the top plate, and an extrusion assembly is installed below a base in the power assembly. Through cooperation of the hydraulic cylinder, the outer edge pressing block, the center pressing block, the base, the magnesium alloy block and the pressure sensor, due to the fact that in the whole equipment, pressure of the pressure sensor is transmitted layer by layer, and the pressure sensor does not make direct contact with the magnesium alloy block, it can be effectively avoided that when the magnesium alloy block is damaged in a test, the magnesium alloy block is damaged; and the pressure sensor is easily damaged due to direct contact between the pressure sensor and the magnesium alloy block or cannot be taken out due to sinking into the magnesium alloy block.

Description

Technical Field

[0001] This invention relates to the field of magnesium alloy extrusion testing technology, specifically to a magnesium alloy extrusion testing system. Background Technology

[0002] Magnesium alloys are alloys composed of magnesium as a base and other elements. Their characteristics include low density, high strength, high elastic modulus, good heat dissipation, good shock absorption, greater impact load capacity than aluminum alloys, and good resistance to corrosion from organic substances and alkalis. The main alloying elements include aluminum, zinc, manganese, cerium, thorium, and small amounts of zirconium or cadmium. Currently, magnesium-aluminum alloys are the most widely used, followed by magnesium-manganese alloys and magnesium-zinc-zirconium alloys, mainly used in aerospace, transportation, chemical, and rocket industries. It is the lightest of the practical metals, possessing high strength and rigidity. Magnesium alloys require strength testing after production and processing, necessitating the use of magnesium alloy extrusion testing equipment.

[0003] Existing aluminum-magnesium alloy extrusion testing equipment includes a base plate, a test platform located above the base plate, and a lifting plate located above the test platform. However, although it can quickly clamp and fix the aluminum-magnesium alloy block, making the clamping efficiency of the testing equipment higher, once the magnesium alloy block is damaged during the test, the pressure sensor is easily damaged or trapped in the magnesium alloy block and cannot be removed because it is in direct contact with the magnesium alloy block. Furthermore, it still has the problem that the detection position is too limited when performing extrusion testing on the magnesium alloy block, and it cannot quickly perform extrusion testing at different positions as needed. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that when the magnesium alloy block test is damaged, the pressure sensor is easily damaged or trapped in the magnesium alloy block and cannot be removed because it is in direct contact with the magnesium alloy block. In addition, the device still has the problem that the detection position is too singular when performing extrusion test on the magnesium alloy block, and it is not possible to quickly perform extrusion test on different positions as needed. Therefore, a magnesium alloy extrusion test system is proposed.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A magnesium alloy extrusion testing system is designed, comprising a top plate and a bottom plate. The four inner corners of the top plate and the bottom plate are fixedly connected by columns. A magnesium alloy block is placed on the top of the bottom plate. The four outer corners of the bottom plate are fixedly connected to an electric push rod by a support frame. A push plate is fixedly connected to the end of the output shaft of the electric push rod. A power assembly is installed on the upper inner wall of the top plate. An extrusion assembly is installed below the base of the power assembly.

[0007] This setup: Through the design of four electric push rods and push plates, the electric push rods in multiple positions are controlled to start synchronously, so that the output shaft of the electric push rod can drive the push plate to move inward, so that the push plate pushes the magnesium alloy block to the center of the base plate. The upper surface of the base plate can be machined to have a low coefficient of friction so that the magnesium alloy block can move freely.

[0008] Preferably, the power assembly includes a hydraulic cylinder, which is fixedly connected to the upper center of the top plate. The output shaft of the hydraulic cylinder passes through the top plate, and a horizontal plate is fixedly connected to the end of the output shaft. A sliding rod is fixedly connected to both sides of the upper end of the horizontal plate. The outer wall of the sliding rod is slidably connected to the top plate. A second sliding rod is slidably connected to the inner walls of the four corners of the horizontal plate. A base is fixedly connected to the lower end of the second sliding rod.

[0009] This setup: Through the design of the horizontal plate, base, and pressure sensor, the hydraulic cylinder output shaft continuously applies pressure to the magnesium alloy block. The corresponding pressure sensor's lower detection head detects the specific pressure value in real time and transmits it to the external system via cable. Because the pressure of the pressure sensor is transmitted layer by layer in the overall equipment, the pressure sensor does not directly contact the magnesium alloy block.

[0010] Preferably, springs are provided on the upper part of the outer wall of the slide rod 2, and the two ends of the springs are fixedly connected to the base and the end plate of the slide rod 2, respectively. Multiple conical grooves are machined on the lower inner wall of the base.

[0011] Preferably, both ends of the outer side of the push plate are fixedly connected to slide rods three, and the outer walls of the slide rods three are slidably connected to the support frame.

[0012] Preferably, the inner center of the outer wall of the push plate is machined with an arc-shaped surface, and the inner side of the arc-shaped surface is in contact with the magnesium alloy block.

[0013] This feature: Through the design of the arc-shaped surface of the push plate end face and center, when multiple electric push rods are activated, the inner wall of the push plate is machined with an arc-shaped surface, while the end face of the push plate is still designed as a flat surface, which allows for the center positioning of cylindrical or square magnesium alloy blocks.

[0014] Preferably, the extrusion assembly includes a base located below the base. The upper end of the base is fixed with multiple tapered ribs, which are slidably connected to tapered grooves. The lower end of the base can be fitted with either an outer edge pressing block or a center pressing block.

[0015] Preferably, both the tapered ridge and the tapered groove are tapered in shape, wider at the top and narrower at the bottom.

[0016] This feature, through the design of conical protrusions, conical grooves, and outer edge or center pressure blocks, allows the corresponding base to be inserted into the conical groove via the conical protrusions, and the base to be aligned with the edge of the base (due to the conical design that is wider at the top and narrower at the bottom, the conical protrusions and conical grooves can move up and down synchronously after installation), thus completing the installation of the corresponding outer edge or center pressure block. The overall installation and disassembly process is relatively convenient, and it is designed as a base with replaceable test positions.

[0017] Preferably, a pressure sensor is fixedly connected to the center of the lower end of the cross plate, and the front side of the pressure sensor is connected to an external system via a cable.

[0018] The magnesium alloy extrusion testing system proposed in this invention has the following advantages:

[0019] Through the cooperation between the magnesium alloy block, the base plate, the curved surface, and the push plate, the magnesium alloy block to be tested is placed above the center of the base plate. Then, the electric push rods at multiple positions are started synchronously, so that the output shaft of the electric push rod can drive the push plate to move inward, so that the push plate pushes the magnesium alloy block to the exact center of the base plate. The upper surface of the base plate can be machined with a low coefficient of friction to allow the magnesium alloy block to move freely. The inner wall of the push plate is machined with a curved surface, while the end face of the push plate is still designed to be flat, so that cylindrical or square magnesium alloy blocks can be centered.

[0020] Through the cooperation of the hydraulic cylinder, outer edge pressure block, central pressure block, base, magnesium alloy block, and pressure sensor, the output shaft of the hydraulic cylinder can drive the pressure sensor and base downward through the cross plate until the outer edge pressure block or central pressure block contacts the magnesium alloy block. At this point, the base is blocked and no longer moves downward, while the cross plate can continue to drive the pressure sensor downward until the lower detection head of the pressure sensor is pressed against the base to start the test. The output shaft of the hydraulic cylinder continuously applies pressure to the magnesium alloy block, and the corresponding lower detection head of the pressure sensor detects the specific pressure value in real time and transmits it to the external system through a cable. Since the pressure of the pressure sensor is transmitted layer by layer in the whole device, and the pressure sensor does not directly contact the magnesium alloy block, this effectively avoids the problem that if the magnesium alloy block is damaged during the test, the pressure sensor will be easily damaged or become stuck in the magnesium alloy block and cannot be removed.

[0021] The user can easily install the corresponding base (with an outer edge pressure block or a center pressure block) by using the fit between the base, outer edge pressure block, center pressure block, base, conical protrusion, and conical slide groove. Then, the user inserts the corresponding base into the conical slide groove through the conical protrusion and aligns the edges of the base with the base (the conical design, wider at the top and narrower at the bottom, allows the conical protrusion and slide groove to move up and down synchronously after installation). This completes the installation of the corresponding outer edge pressure block or center pressure block. Because the overall installation and disassembly process is convenient and the base is designed with replaceable test positions, it effectively avoids the problem of the test position being too limited when performing extrusion tests on magnesium alloy blocks, making it impossible to quickly perform extrusion tests on different positions as needed. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the outer edge detection state of the present invention;

[0023] Figure 2 For the present invention Figure 1 A diagram of the structure viewed from below;

[0024] Figure 3 For the present invention Figure 1 A schematic diagram of the main view structure in the image;

[0025] Figure 4 For the present invention Figure 1 A schematic diagram of the left-side view structure in the image;

[0026] Figure 5 This is a schematic diagram of the central detection state of the present invention;

[0027] Figure 6 For the present invention Figure 5 A diagram of the structure viewed from below;

[0028] Figure 7 For the present invention Figure 2 Schematic diagram of the structure at point A in the diagram;

[0029] Figure 8 For the present invention Figure 6 The structural diagram at point B in the diagram.

[0030] In the diagram: 1. Top plate, 2. Column, 3. Base plate, 4. Extrusion assembly, 401. Base, 402. Outer edge pressure block, 403. Conical protrusion, 404. Center pressure block, 5. Power assembly, 501. Slide rod one, 502. Horizontal plate, 503. Spring, 504. Slide rod two, 505. Base, 506. Conical slide groove, 507. Hydraulic cylinder, 6. Pressure sensor, 7. Cable, 8. Electric push rod, 9. Push plate, 10. Slide rod three, 11. Support frame, 12. Magnesium alloy block, 13. Arc surface. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings:

[0032] See attached document Figure 1-8 In this embodiment, a magnesium alloy extrusion testing system includes a top plate 1 and a bottom plate 3. The four inner corners of the top plate 1 and the bottom plate 3 are fixedly connected by columns 2. A magnesium alloy block 12 is placed on the top of the bottom plate 3. The shape of the magnesium alloy block 12 is not limited. This system can perform positioning and testing on cylindrical and square magnesium alloy blocks 12. The four outer corners of the bottom plate 3 are fixedly connected to an electric push rod 8 by a support frame 11. A push plate 9 is fixedly connected to the end of the output shaft of the electric push rod 8. The model of the electric push rod 8 can be determined according to the specific application.

[0033] A power assembly 5 is installed on the upper inner wall of the top plate 1. A pressing assembly 4 is installed below the base 505 in the power assembly 5. Slide rods 10 are fixed to both ends of the outer side of the push plate 9. The outer walls of slide rods 10 are slidably connected to the support frame 11. An arc surface 13 is machined at the center of the inner side of the outer wall of the push plate 9. The inner side of the arc surface 13 is in contact with the magnesium alloy block 12. A pressure sensor 6 is fixed to the center of the lower end of the horizontal plate 502. The front side of the pressure sensor 6 is connected to the external system through a cable 7. The model of the pressure sensor 6 can be determined according to the specific application.

[0034] See attached document Figure 1-8 In this embodiment, the power assembly 5 includes a hydraulic cylinder 507, which is fixedly connected to the upper center of the top plate 1. The model of the hydraulic cylinder 507 can be determined according to the specific application. The output shaft of the hydraulic cylinder 507 passes through the top plate 1, and a horizontal plate 502 is fixedly connected to the end of the output shaft of the hydraulic cylinder 507. A sliding rod 501 is fixedly connected to both sides of the upper end of the horizontal plate 502. The outer wall of the sliding rod 501 is slidably connected to the top plate 1. Sliding rods 504 are slidably connected to the inner walls of the four corners of the horizontal plate 502. The lower end of the slide bar 504 is fixedly connected to a base 505. Springs 503 are provided on the upper part of the outer wall of the slide bar 504. The elastic coefficient of the springs 503 can be determined according to the specific application. Since the four springs 503 are only used for the reset of the base 505 and do not require a large elastic force, and the compression detection value is large, the influence of the springs on the final value can be ignored. The two ends of the springs 503 are fixedly connected to the end plates of the base 505 and the slide bar 504 respectively. Multiple conical grooves 506 are machined on the lower inner wall of the base 505.

[0035] See attached document Figure 1-8In this embodiment, the extrusion assembly 4 includes a base 401, which is located below the base 505. The upper end of the base 401 is fixed with multiple tapered ribs 403. The tapered ribs 403 are slidably connected to the tapered grooves 506. The lower end of the base 401 can be equipped with two different designs: an outer edge pressing block 402 and a central pressing block 404. Both the tapered ribs 403 and the tapered grooves 506 are tapered designs that are wider at the top and narrower at the bottom. Due to the tapered design that is wider at the top and narrower at the bottom, the tapered ribs 403 and the tapered grooves 506 can move up and down synchronously after installation.

[0036] Working principle:

[0037] When this magnesium alloy extrusion testing system is needed, the user can first place the magnesium alloy block 12 to be tested above the center of the base plate 3. Then, the electric push rods 8 at multiple positions are started simultaneously, so that the output shaft of the electric push rod 8 can drive the push plate 9 to move inward, so that the push plate 9 pushes the magnesium alloy block 12 to the center of the base plate 3. The upper surface of the base plate 3 can be machined with a design with a low coefficient of friction so that the magnesium alloy block 12 can move freely. The inner wall of the push plate 9 is machined with an arc surface 13, while the end face of the push plate 9 is still designed as a flat surface, so that the cylindrical or square magnesium alloy block 12 can be centered.

[0038] After positioning, the user can remove the corresponding base 401 (with outer edge pressure block 402 or center pressure block 404) as needed. Then, the corresponding base 401 is inserted into the conical groove 506 through the conical protrusion 403, and the edge of the base 401 is aligned with that of the base 505 (due to the conical design that is wider at the top and narrower at the bottom, the conical protrusion 403 and the conical groove 506 can move up and down synchronously after installation). This completes the installation of the corresponding outer edge pressure block 402 or center pressure block 404. Since the overall installation and disassembly process is relatively convenient and the base is designed to be interchangeable for test positions, this effectively avoids the problem that the test position is too singular when performing extrusion tests on magnesium alloy blocks, making it impossible to quickly perform extrusion tests on different positions as needed.

[0039] After the base 401 of the corresponding pressure block is installed, the output shaft of the hydraulic cylinder 507 extends. The output shaft of the hydraulic cylinder 507 can drive the pressure sensor 6 and the base 505 to move downward through the horizontal plate 502 until the outer edge pressure block 402 or the center pressure block 404 contacts the magnesium alloy block 12. At this point, the base 505 is blocked and no longer moves downward, while the horizontal plate 502 can continue to drive the pressure sensor 6 to move downward until the lower detection head of the pressure sensor 6 abuts against the base 505. The test begins, and the output shaft of the hydraulic cylinder 507 continuously applies pressure to the magnesium alloy block 12. The lower detection head of the corresponding pressure sensor 6 detects the pressure. The head detects the specific pressure value in real time and transmits it to the external system via cable 7. (Since the springs 503 at all four locations are only used for the reset of the base 505 and do not require a large elastic force, and the pressure detection value is large, the influence of the springs on the final value can be ignored.) In the overall device, the pressure of the pressure sensor 6 is transmitted layer by layer, and the pressure sensor 6 does not directly contact the magnesium alloy block 12. In this way, the problem that the pressure sensor 6 is easily damaged or trapped in the magnesium alloy block and cannot be removed is effectively avoided once the magnesium alloy block is damaged during the test.

[0040] In use, the entire device can be placed in the corresponding test chamber and adjusted by the external space so that the magnesium alloy block 12 can be subjected to axial pressure under specific parameters such as temperature, extrusion speed and pressing force during the test, thereby detecting data under different conditions.

[0041] Finally, the specific test results can be judged by whether there is a rapid pressure drop at the hydraulic cylinder controlled by the PLC system or by directly observing whether there is an obvious dent on the surface of the magnesium alloy block 12. The specific test process can also be divided into several modes, such as setting a specific oil pressure to observe whether the magnesium alloy block 12 exhibits the above-mentioned problems under the corresponding oil pressure, or by conducting a limit test and gradually increasing the specific oil pressure value until the target oil pressure or limit is reached. After the test is completed, the electric push rod and hydraulic cylinder can be controlled to reset, and the magnesium alloy block 12 can be removed. The specific control process in this case can be controlled by a PLC controller, which may include structures such as electric push rods and hydraulic cylinders. The control content may include specific data control such as self-locking, linkage, synchronous start and stop, and extension and retraction speed.

[0042] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art will understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A magnesium alloy extrusion testing system, comprising a top plate (1) and a bottom plate (3), wherein the four inner corners of the top plate (1) and the bottom plate (3) are fixedly connected by columns (2), characterized in that: A magnesium alloy block (12) is placed on top of the base plate (3). The four corners of the outer wall of the base plate (3) are fixedly connected to the electric push rod (8) through the support frame (11). The output shaft end of the electric push rod (8) is fixedly connected to the push plate (9). A power assembly (5) is installed on the upper inner wall of the top plate (1). An extrusion assembly (4) is installed below the base (505) in the power assembly (5).

2. The magnesium alloy extrusion testing system according to claim 1, characterized in that: The power assembly (5) includes a hydraulic cylinder (507), which is fixedly connected to the upper center of the top plate (1). The output shaft of the hydraulic cylinder (507) passes through the top plate (1), and a horizontal plate (502) is fixedly connected to the end of the output shaft of the hydraulic cylinder (507). A sliding rod (501) is fixedly connected to both sides of the upper end of the horizontal plate (502). The outer wall of the sliding rod (501) is slidably connected to the top plate (1). A sliding rod (504) is slidably connected to the inner walls of the four corners of the horizontal plate (502). A base (505) is fixedly connected to the lower end of the sliding rod (504).

3. The magnesium alloy extrusion testing system according to claim 2, characterized in that: Springs (503) are provided on the upper part of the outer wall of the slide bar 2 (504). The two ends of the springs (503) are fixedly connected to the base (505) and the end plate of the slide bar 2 (504) respectively. Multiple conical grooves (506) are processed on the lower inner wall of the base (505).

4. The magnesium alloy extrusion testing system according to claim 1, characterized in that: Both ends of the outer side of the push plate (9) are fixedly connected to slide rods three (10), and the outer walls of the slide rods three (10) are slidably connected to the support frame (11).

5. The magnesium alloy extrusion testing system according to claim 1, characterized in that: The inner center of the outer wall of the push plate (9) is machined with an arc-shaped surface (13), and the inner side of the arc-shaped surface (13) is in contact with the magnesium alloy block (12).

6. The magnesium alloy extrusion testing system according to claim 1, characterized in that: The extrusion assembly (4) includes a base (401) located below the base (505). The upper end of the base (401) is fixed with multiple tapered ribs (403), which are slidably connected to tapered grooves (506). The lower end of the base (401) can be fitted with two different designs: an outer edge pressure block (402) and a center pressure block (404).

7. The magnesium alloy extrusion testing system according to claim 6, characterized in that: Both the tapered rib (403) and the tapered groove (506) are tapered designs that are wider at the top and narrower at the bottom.

8. The magnesium alloy extrusion testing system according to claim 2, characterized in that: A pressure sensor (6) is fixedly connected to the center of the lower end of the horizontal plate (502), and the front side of the pressure sensor (6) is connected to an external system via a cable (7).

Images